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* [Bug c++/67376] New: Comparison with pointer to past-the-end of array fails inside constant expression
@ 2015-08-27 23:00 ldionne.2 at gmail dot com
2015-08-29 15:49 ` [Bug c++/67376] " trippels at gcc dot gnu.org
` (7 more replies)
0 siblings, 8 replies; 9+ messages in thread
From: ldionne.2 at gmail dot com @ 2015-08-27 23:00 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67376
Bug ID: 67376
Summary: Comparison with pointer to past-the-end of array fails
inside constant expression
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: ldionne.2 at gmail dot com
Target Milestone: ---
The following code fails to compile on GCC trunk:
struct array {
int elems_[1];
};
constexpr array a{{0}};
static_assert(a.elems_ != a.elems_ + 1, "");
The error (formatted to fit the report) is
[snip]: error: non-constant condition for static assertion
static_assert(a.elems_ != a.elems_ + 1, "");
^
[snip]: error: ‘(((const int*)(& a.array::elems_)) !=
(((const int*)(& a.array::elems_)) + 4u))’
is not a constant expression
static_assert(a.elems_ != a.elems_ + 1, "");
^
It seems like GCC does not like the fact that we're comparing a past-the-end
pointer. But then again, that's weird because the following code works fine:
constexpr int a[1] = {0};
static_assert(a != a + 1, "");
Live example: http://melpon.org/wandbox/permlink/4QKMVN5vm3ePJcpY
>From gcc-bugs-return-495764-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 27 23:05:40 2015
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From: "juergen.reuter at desy dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/67377] New: gcc 6.0 fails to compile on Darwin 14
Date: Thu, 27 Aug 2015 23:05:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?idg377
Bug ID: 67377
Summary: gcc 6.0 fails to compile on Darwin 14
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: juergen.reuter at desy dot de
Target Milestone: ---
When compiling gcc (svn r227279) on Darwin 14.5.0 with Xcode 6.4, clang Apple
LLVM version 6.1.0 (clang-602.0.53) (based on LLVM 3.6.0svn)
Target: x86_64-apple-darwin14.5.0, I get the compile error:
test -f config.h || (rm -f stamp-h1 &&
/Applications/Xcode.app/Contents/Developer/usr/bin/make stamp-h1)
true "AR_FLAGS=rc" "CC_FOR_BUILD=gcc" "CFLAGS=-g " "CXXFLAGS=-g "
"CFLAGS_FOR_BUILD=-g -O2" "CFLAGS_FOR_TARGET=-g -O2"
"INSTALL=/opt/local/bin/ginstall -c" "INSTALL_DATA=/opt/local/bin/ginstall -c
-m 644" "INSTALL_PROGRAM=/opt/local/bin/ginstall -c"
"INSTALL_SCRIPT=/opt/local/bin/ginstall -c" "LDFLAGS=-Wl,-no_pie "
"LIBCFLAGS=-g -O2" "LIBCFLAGS_FOR_TARGET=-g -O2"
"MAKE=/Applications/Xcode.app/Contents/Developer/usr/bin/make"
"MAKEINFO=makeinfo --split-sizeP00000 --split-sizeP00000
--split-sizeP00000 " "PICFLAG=" "PICFLAG_FOR_TARGET=" "SHELL=/bin/sh"
"EXPECT=expect" "RUNTEST=runtest" "RUNTESTFLAGS=" "exec_prefix=/usr/local"
"infodir=/usr/local/share/info" "libdir=/usr/local/lib" "prefix=/usr/local"
"tooldir=/usr/local/x86_64-apple-darwin14.5.0" "AR=ar" "AS=as" "CC=gcc"
"CXX=g++ -std=gnu++98"
"LD=/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld"
"LIBCFLAGS=-g -O2" "NM=nm" "PICFLAG=" "RANLIB=ranlib" "DESTDIR=" DO=all
multi-do # /Applications/Xcode.app/Contents/Developer/usr/bin/make
/Applications/Xcode.app/Contents/Developer/usr/bin/make all-am
true DO=all multi-do # /Applications/Xcode.app/Contents/Developer/usr/bin/make
test -f config.h || (rm -f stamp-h1 &&
/Applications/Xcode.app/Contents/Developer/usr/bin/make stamp-h1)
make[3]: Nothing to be done for `all'.
g++ -std=gnu++98 -fno-PIE -c -DTARGET_NAME=\"x86_64-apple-darwin14.5.0\" -g
-DIN_GCC -fno-strict-aliasing -fno-exceptions -fno-rtti
-fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings
-Wcast-qual -Wno-format -Wmissing-format-attribute -Woverloaded-virtual
-pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings
-fno-common -DHAVE_CONFIG_H -I. -I. -I../../gcc -I../../gcc/.
-I../../gcc/../include -I./../intl -I../../gcc/../libcpp/include
-I/usr/local//include -I/usr/local//include -I/usr/local//include
-I../../gcc/../libdecnumber -I../../gcc/../libdecnumber/dpd -I../libdecnumber
-I../../gcc/../libbacktrace -o toplev.o -MT toplev.o -MMD -MP -MF
./.deps/toplev.TPo ../../gcc/toplev.c
clang: warning: treating 'c' input as 'c++' when in C++ mode, this behavior is
deprecated
[....]
../../gcc/toplev.c:1320:10: error: use of undeclared identifier
'flag_loop_block'
|| flag_loop_block
^
../../gcc/toplev.c:1321:10: error: use of undeclared identifier
'flag_loop_interchange'
|| flag_loop_interchange
^
../../gcc/toplev.c:1322:10: error: use of undeclared identifier
'flag_loop_strip_mine'
|| flag_loop_strip_mine
^
This has probably to do with changes from Yosemite 10.10.4->10.10.5, or with
Xcode 6.4 (quite unlikely) or any changes in gcc between r226713 and r227279.
When using r276713, toplevel.c compiles but then I'm stuck with:
The directory that should contain system headers does not exist:
/usr/include
What puzzles me is that MAC OS X/clang tries to compile the C code in gcc by
means of g++ -std=gnu++98 and then issuing a warning that this behavior is
deprecated. I'll do a few check, but someone else should have been stumbled
over those things, too.
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug c++/67376] Comparison with pointer to past-the-end of array fails inside constant expression
2015-08-27 23:00 [Bug c++/67376] New: Comparison with pointer to past-the-end of array fails inside constant expression ldionne.2 at gmail dot com
@ 2015-08-29 15:49 ` trippels at gcc dot gnu.org
2015-09-04 14:07 ` trippels at gcc dot gnu.org
` (6 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: trippels at gcc dot gnu.org @ 2015-08-29 15:49 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67376
Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |columbo@gmx-topmail.de
--- Comment #1 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
*** Bug 67380 has been marked as a duplicate of this bug. ***
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug c++/67376] Comparison with pointer to past-the-end of array fails inside constant expression
2015-08-27 23:00 [Bug c++/67376] New: Comparison with pointer to past-the-end of array fails inside constant expression ldionne.2 at gmail dot com
2015-08-29 15:49 ` [Bug c++/67376] " trippels at gcc dot gnu.org
@ 2015-09-04 14:07 ` trippels at gcc dot gnu.org
2015-09-04 14:24 ` trippels at gcc dot gnu.org
` (5 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: trippels at gcc dot gnu.org @ 2015-09-04 14:07 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67376
Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |trippels at gcc dot gnu.org
Resolution|--- |DUPLICATE
--- Comment #2 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
dup.
*** This bug has been marked as a duplicate of bug 52902 ***
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug c++/67376] Comparison with pointer to past-the-end of array fails inside constant expression
2015-08-27 23:00 [Bug c++/67376] New: Comparison with pointer to past-the-end of array fails inside constant expression ldionne.2 at gmail dot com
2015-08-29 15:49 ` [Bug c++/67376] " trippels at gcc dot gnu.org
2015-09-04 14:07 ` trippels at gcc dot gnu.org
@ 2015-09-04 14:24 ` trippels at gcc dot gnu.org
2015-09-04 15:06 ` [Bug c++/67376] [5/6 regression] " trippels at gcc dot gnu.org
` (4 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: trippels at gcc dot gnu.org @ 2015-09-04 14:24 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67376
Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |NEW
Last reconfirmed| |2015-09-04
Resolution|DUPLICATE |---
Ever confirmed|0 |1
--- Comment #3 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Not a dup, sorry.
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug c++/67376] [5/6 regression] Comparison with pointer to past-the-end of array fails inside constant expression
2015-08-27 23:00 [Bug c++/67376] New: Comparison with pointer to past-the-end of array fails inside constant expression ldionne.2 at gmail dot com
` (2 preceding siblings ...)
2015-09-04 14:24 ` trippels at gcc dot gnu.org
@ 2015-09-04 15:06 ` trippels at gcc dot gnu.org
2015-09-04 15:27 ` trippels at gcc dot gnu.org
` (3 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: trippels at gcc dot gnu.org @ 2015-09-04 15:06 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67376
Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |rejects-valid
Summary|Comparison with pointer to |[5/6 regression] Comparison
|past-the-end of array fails |with pointer to
|inside constant expression |past-the-end of array fails
| |inside constant expression
--- Comment #4 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Started with r214941.
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug c++/67376] [5/6 regression] Comparison with pointer to past-the-end of array fails inside constant expression
2015-08-27 23:00 [Bug c++/67376] New: Comparison with pointer to past-the-end of array fails inside constant expression ldionne.2 at gmail dot com
` (3 preceding siblings ...)
2015-09-04 15:06 ` [Bug c++/67376] [5/6 regression] " trippels at gcc dot gnu.org
@ 2015-09-04 15:27 ` trippels at gcc dot gnu.org
2015-09-04 15:30 ` msebor at gcc dot gnu.org
` (2 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: trippels at gcc dot gnu.org @ 2015-09-04 15:27 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67376
--- Comment #5 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
And:
static_assert(a.elems_ + 1, "");
started to get rejected with r212499.
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug c++/67376] [5/6 regression] Comparison with pointer to past-the-end of array fails inside constant expression
2015-08-27 23:00 [Bug c++/67376] New: Comparison with pointer to past-the-end of array fails inside constant expression ldionne.2 at gmail dot com
` (4 preceding siblings ...)
2015-09-04 15:27 ` trippels at gcc dot gnu.org
@ 2015-09-04 15:30 ` msebor at gcc dot gnu.org
2015-10-16 8:27 ` rguenth at gcc dot gnu.org
2016-04-02 17:15 ` msebor at gcc dot gnu.org
7 siblings, 0 replies; 9+ messages in thread
From: msebor at gcc dot gnu.org @ 2015-09-04 15:30 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67376
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |msebor at gcc dot gnu.org
--- Comment #6 from Martin Sebor <msebor at gcc dot gnu.org> ---
It also fails for pointers into the array (e.g., if the number of elements in
elems_ is changed to 2). However, it doesn't fail when the operands of the ==
operator are exchanged.
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug c++/67376] [5/6 regression] Comparison with pointer to past-the-end of array fails inside constant expression
2015-08-27 23:00 [Bug c++/67376] New: Comparison with pointer to past-the-end of array fails inside constant expression ldionne.2 at gmail dot com
` (5 preceding siblings ...)
2015-09-04 15:30 ` msebor at gcc dot gnu.org
@ 2015-10-16 8:27 ` rguenth at gcc dot gnu.org
2016-04-02 17:15 ` msebor at gcc dot gnu.org
7 siblings, 0 replies; 9+ messages in thread
From: rguenth at gcc dot gnu.org @ 2015-10-16 8:27 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67376
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |5.3
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug c++/67376] [5/6 regression] Comparison with pointer to past-the-end of array fails inside constant expression
2015-08-27 23:00 [Bug c++/67376] New: Comparison with pointer to past-the-end of array fails inside constant expression ldionne.2 at gmail dot com
` (6 preceding siblings ...)
2015-10-16 8:27 ` rguenth at gcc dot gnu.org
@ 2016-04-02 17:15 ` msebor at gcc dot gnu.org
7 siblings, 0 replies; 9+ messages in thread
From: msebor at gcc dot gnu.org @ 2016-04-02 17:15 UTC (permalink / raw)
To: gcc-bugs
[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #1: Type: text/plain; charset="UTF-8", Size: 5759417 bytes --]
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67376
--- Comment #17 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Sat Apr 2 17:14:48 2016
New Revision: 234698
URL: https://gcc.gnu.org/viewcvs?rev=234698&root=gcc&view=rev
Log:
PR c++/67376 - [5/6 regression] Comparison with pointer to past-the-end
of array fails inside constant expression
PR c++/70170 - [6 regression] bogus not a constant expression error comparing
pointer to array to null
PR c++/70172 - incorrect reinterpret_cast from integer to pointer error
on invalid constexpr initialization
PR c++/70228 - insufficient detail in diagnostics for a constexpr out of bounds
array subscript
gcc/testsuite/ChangeLog:
2016-04-02 Martin Sebor <msebor@redhat.com>
PR c++/67376
PR c++/70170
PR c++/70172
PR c++/70228
* g++.dg/cpp0x/constexpr-array-ptr10.C: New test.
* g++.dg/cpp0x/constexpr-array-ptr9.C: New test.
* g++.dg/cpp0x/constexpr-nullptr-1.C: New test.
* g++.dg/cpp0x/constexpr-array5.C: Adjust text of expected diagnostic.
* g++.dg/cpp0x/constexpr-string.C: Same.
* g++.dg/cpp0x/constexpr-wstring2.C: Same.
* g++.dg/cpp0x/pr65398.C: Same.
* g++.dg/ext/constexpr-vla1.C: Same.
* g++.dg/ext/constexpr-vla2.C: Same.
* g++.dg/ext/constexpr-vla3.C: Same.
* g++.dg/ubsan/pr63956.C: Same.
gcc/cp/ChangeLog:
2016-04-02 Martin Sebor <msebor@redhat.com>
PR c++/67376
PR c++/70170
PR c++/70172
PR c++/70228
* constexpr.c (diag_array_subscript): New function.
(cxx_eval_array_reference): Detect out of bounds array indices.
gcc/ChangeLog:
2016-04-02 Martin Sebor <msebor@redhat.com>
PR c++/67376
* fold-const.c (maybe_nonzero_address): New function.
(fold_comparison): Call it. Fold equality and relational
expressions involving null pointers.
(tree_single_nonzero_warnv_p): Call maybe_nonzero_address.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-array-ptr10.C
trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-array-ptr9.C
trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-nullptr-1.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/constexpr.c
trunk/gcc/fold-const.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-array5.C
trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-string.C
trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-wstring2.C
trunk/gcc/testsuite/g++.dg/cpp0x/pr65398.C
trunk/gcc/testsuite/g++.dg/ext/constexpr-vla1.C
trunk/gcc/testsuite/g++.dg/ext/constexpr-vla2.C
trunk/gcc/testsuite/g++.dg/ext/constexpr-vla3.C
trunk/gcc/testsuite/g++.dg/ubsan/pr63956.C
>From gcc-bugs-return-520943-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 02 17:15:42 2016
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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++/70228] insufficient detail in diagnostics for a constexpr out of bounds array subscript
Date: Sat, 02 Apr 2016 17:15:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70228
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Sat Apr 2 17:14:48 2016
New Revision: 234698
URL: https://gcc.gnu.org/viewcvs?rev=234698&root=gcc&view=rev
Log:
PR c++/67376 - [5/6 regression] Comparison with pointer to past-the-end
of array fails inside constant expression
PR c++/70170 - [6 regression] bogus not a constant expression error comparing
pointer to array to null
PR c++/70172 - incorrect reinterpret_cast from integer to pointer error
on invalid constexpr initialization
PR c++/70228 - insufficient detail in diagnostics for a constexpr out of bounds
array subscript
gcc/testsuite/ChangeLog:
2016-04-02 Martin Sebor <msebor@redhat.com>
PR c++/67376
PR c++/70170
PR c++/70172
PR c++/70228
* g++.dg/cpp0x/constexpr-array-ptr10.C: New test.
* g++.dg/cpp0x/constexpr-array-ptr9.C: New test.
* g++.dg/cpp0x/constexpr-nullptr-1.C: New test.
* g++.dg/cpp0x/constexpr-array5.C: Adjust text of expected diagnostic.
* g++.dg/cpp0x/constexpr-string.C: Same.
* g++.dg/cpp0x/constexpr-wstring2.C: Same.
* g++.dg/cpp0x/pr65398.C: Same.
* g++.dg/ext/constexpr-vla1.C: Same.
* g++.dg/ext/constexpr-vla2.C: Same.
* g++.dg/ext/constexpr-vla3.C: Same.
* g++.dg/ubsan/pr63956.C: Same.
gcc/cp/ChangeLog:
2016-04-02 Martin Sebor <msebor@redhat.com>
PR c++/67376
PR c++/70170
PR c++/70172
PR c++/70228
* constexpr.c (diag_array_subscript): New function.
(cxx_eval_array_reference): Detect out of bounds array indices.
gcc/ChangeLog:
2016-04-02 Martin Sebor <msebor@redhat.com>
PR c++/67376
* fold-const.c (maybe_nonzero_address): New function.
(fold_comparison): Call it. Fold equality and relational
expressions involving null pointers.
(tree_single_nonzero_warnv_p): Call maybe_nonzero_address.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-array-ptr10.C
trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-array-ptr9.C
trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-nullptr-1.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/constexpr.c
trunk/gcc/fold-const.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-array5.C
trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-string.C
trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-wstring2.C
trunk/gcc/testsuite/g++.dg/cpp0x/pr65398.C
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>From gcc-bugs-return-520942-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 02 17:15:42 2016
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Subject: [Bug c++/70172] incorrect reinterpret_cast from integer to pointer error on invalid constexpr initialization
Date: Sat, 02 Apr 2016 17:15:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70172
--- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Sat Apr 2 17:14:48 2016
New Revision: 234698
URL: https://gcc.gnu.org/viewcvs?rev=234698&root=gcc&view=rev
Log:
PR c++/67376 - [5/6 regression] Comparison with pointer to past-the-end
of array fails inside constant expression
PR c++/70170 - [6 regression] bogus not a constant expression error comparing
pointer to array to null
PR c++/70172 - incorrect reinterpret_cast from integer to pointer error
on invalid constexpr initialization
PR c++/70228 - insufficient detail in diagnostics for a constexpr out of bounds
array subscript
gcc/testsuite/ChangeLog:
2016-04-02 Martin Sebor <msebor@redhat.com>
PR c++/67376
PR c++/70170
PR c++/70172
PR c++/70228
* g++.dg/cpp0x/constexpr-array-ptr10.C: New test.
* g++.dg/cpp0x/constexpr-array-ptr9.C: New test.
* g++.dg/cpp0x/constexpr-nullptr-1.C: New test.
* g++.dg/cpp0x/constexpr-array5.C: Adjust text of expected diagnostic.
* g++.dg/cpp0x/constexpr-string.C: Same.
* g++.dg/cpp0x/constexpr-wstring2.C: Same.
* g++.dg/cpp0x/pr65398.C: Same.
* g++.dg/ext/constexpr-vla1.C: Same.
* g++.dg/ext/constexpr-vla2.C: Same.
* g++.dg/ext/constexpr-vla3.C: Same.
* g++.dg/ubsan/pr63956.C: Same.
gcc/cp/ChangeLog:
2016-04-02 Martin Sebor <msebor@redhat.com>
PR c++/67376
PR c++/70170
PR c++/70172
PR c++/70228
* constexpr.c (diag_array_subscript): New function.
(cxx_eval_array_reference): Detect out of bounds array indices.
gcc/ChangeLog:
2016-04-02 Martin Sebor <msebor@redhat.com>
PR c++/67376
* fold-const.c (maybe_nonzero_address): New function.
(fold_comparison): Call it. Fold equality and relational
expressions involving null pointers.
(tree_single_nonzero_warnv_p): Call maybe_nonzero_address.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-array-ptr10.C
trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-array-ptr9.C
trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-nullptr-1.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/constexpr.c
trunk/gcc/fold-const.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-array5.C
trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-string.C
trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-wstring2.C
trunk/gcc/testsuite/g++.dg/cpp0x/pr65398.C
trunk/gcc/testsuite/g++.dg/ext/constexpr-vla1.C
trunk/gcc/testsuite/g++.dg/ext/constexpr-vla2.C
trunk/gcc/testsuite/g++.dg/ext/constexpr-vla3.C
trunk/gcc/testsuite/g++.dg/ubsan/pr63956.C
>From gcc-bugs-return-520940-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 02 17:15:41 2016
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Subject: [Bug c++/70170] [6 regression] bogus not a constant expression error comparing pointer to array to null
Date: Sat, 02 Apr 2016 17:15:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70170
--- Comment #12 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Sat Apr 2 17:14:48 2016
New Revision: 234698
URL: https://gcc.gnu.org/viewcvs?rev=234698&root=gcc&view=rev
Log:
PR c++/67376 - [5/6 regression] Comparison with pointer to past-the-end
of array fails inside constant expression
PR c++/70170 - [6 regression] bogus not a constant expression error comparing
pointer to array to null
PR c++/70172 - incorrect reinterpret_cast from integer to pointer error
on invalid constexpr initialization
PR c++/70228 - insufficient detail in diagnostics for a constexpr out of bounds
array subscript
gcc/testsuite/ChangeLog:
2016-04-02 Martin Sebor <msebor@redhat.com>
PR c++/67376
PR c++/70170
PR c++/70172
PR c++/70228
* g++.dg/cpp0x/constexpr-array-ptr10.C: New test.
* g++.dg/cpp0x/constexpr-array-ptr9.C: New test.
* g++.dg/cpp0x/constexpr-nullptr-1.C: New test.
* g++.dg/cpp0x/constexpr-array5.C: Adjust text of expected diagnostic.
* g++.dg/cpp0x/constexpr-string.C: Same.
* g++.dg/cpp0x/constexpr-wstring2.C: Same.
* g++.dg/cpp0x/pr65398.C: Same.
* g++.dg/ext/constexpr-vla1.C: Same.
* g++.dg/ext/constexpr-vla2.C: Same.
* g++.dg/ext/constexpr-vla3.C: Same.
* g++.dg/ubsan/pr63956.C: Same.
gcc/cp/ChangeLog:
2016-04-02 Martin Sebor <msebor@redhat.com>
PR c++/67376
PR c++/70170
PR c++/70172
PR c++/70228
* constexpr.c (diag_array_subscript): New function.
(cxx_eval_array_reference): Detect out of bounds array indices.
gcc/ChangeLog:
2016-04-02 Martin Sebor <msebor@redhat.com>
PR c++/67376
* fold-const.c (maybe_nonzero_address): New function.
(fold_comparison): Call it. Fold equality and relational
expressions involving null pointers.
(tree_single_nonzero_warnv_p): Call maybe_nonzero_address.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-array-ptr10.C
trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-array-ptr9.C
trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-nullptr-1.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/constexpr.c
trunk/gcc/fold-const.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-array5.C
trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-string.C
trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-wstring2.C
trunk/gcc/testsuite/g++.dg/cpp0x/pr65398.C
trunk/gcc/testsuite/g++.dg/ext/constexpr-vla1.C
trunk/gcc/testsuite/g++.dg/ext/constexpr-vla2.C
trunk/gcc/testsuite/g++.dg/ext/constexpr-vla3.C
trunk/gcc/testsuite/g++.dg/ubsan/pr63956.C
>From gcc-bugs-return-520944-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 02 17:17:19 2016
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Subject: [Bug c++/67376] [5/6 regression] Comparison with pointer to past-the-end of array fails inside constant expression
Date: Sat, 02 Apr 2016 17:17:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67376
--- Comment #18 from Martin Sebor <msebor at gcc dot gnu.org> ---
The outstanding problems mentioned in comment #10 have been fixed in 6.0 via
r234698.
>From gcc-bugs-return-520945-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 02 17:18:21 2016
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Subject: [Bug c++/70170] [6 regression] bogus not a constant expression error comparing pointer to array to null
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70170
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 by r234698.
>From gcc-bugs-return-520946-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 02 17:18:21 2016
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Subject: [Bug c++/55004] [meta-bug] constexpr issues
Date: Sat, 02 Apr 2016 17:18:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55004
Bug 55004 depends on bug 70170, which changed state.
Bug 70170 Summary: [6 regression] bogus not a constant expression error comparing pointer to array to null
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70170
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
>From gcc-bugs-return-520949-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 02 17:19:37 2016
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Subject: [Bug c++/70228] insufficient detail in diagnostics for a constexpr out of bounds array subscript
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70228
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
Fixed in r234698.
>From gcc-bugs-return-520947-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 02 17:19:01 2016
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Subject: [Bug c++/70172] incorrect reinterpret_cast from integer to pointer error on invalid constexpr initialization
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #6 from Martin Sebor <msebor at gcc dot gnu.org> ---
Fixed by r234698.
>From gcc-bugs-return-520948-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 02 17:19:01 2016
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/55004] [meta-bug] constexpr issues
Date: Sat, 02 Apr 2016 17:19:00 -0000
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Bug 55004 depends on bug 70172, which changed state.
Bug 70172 Summary: incorrect reinterpret_cast from integer to pointer error on invalid constexpr initialization
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70172
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
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Subject: [Bug fortran/61627] specification expression ICE with version 4.7.1 and 4.8.2, incorrect output with 4.4.7 and 4.9.0
Date: Sat, 02 Apr 2016 18:41:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |nathan at gcc dot gnu.org
--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Compiling the test in comment 0 gives an ICE after revision r234636
pr61627.f90:4:0:
end program
internal compiler error: in output_constructor_regular_field, at varasm.c:4968
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70514] Variable length arrays lead to garbage in another array
Date: Sat, 02 Apr 2016 19:53:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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CC| |msebor at gcc dot gnu.org
Resolution|--- |INVALID
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
There are known problems with VLAs in G++ (see bug 16994) but I don't think
this is one of them. I suspect the problem you are seeing is due to the
sort_of_sieve() function writing past the end of the variable length array
allocated in factorize() as underlined below. With that fixed, the output is
as expected. I'm going to close this report as invalid but feel free to reopen
it if you think I missed something.
As an aside, even though I would expect Address Sanitizer to find the bug in
the program, it doesn't (or at least not reliably and it when it does catch it,
it fails to indicate what caused it). I would view that as a bug in the
sanitizer and suggest opening one for it.
void sort_of_sieve(bool primes[], int n) {
for (int i = 2; i <= n; i++) {
^^^^^^
primes[i] = true;
}
}
void factorize(int n, int OUT[]) {
bool primes[n];
^
int factors = 0;
sort_of_sieve(primes, n);
^
With -fsanitize=address, when the program does crash (it doesn't always), I get
one of the following two reports:
ASAN:DEADLYSIGNAL
=================================================================
==20465==ERROR: AddressSanitizer: stack-overflow on address 0x7fffdeac0000 (pc
0x000000400be7 bp 0x7fffdeabd330 sp 0x7fffdeabd2e0 T0)
#0 0x400be6 in factorize(int, int*) (/home/msebor/build/tmp/a.out+0x400be6)
#1 0x400d19 in main (/home/msebor/build/tmp/a.out+0x400d19)
#2 0x7fbd9661157f in __libc_start_main (/lib64/libc.so.6+0x2057f)
#3 0x4009a8 in _start (/home/msebor/build/tmp/a.out+0x4009a8)
SUMMARY: AddressSanitizer: stack-overflow
(/home/msebor/build/tmp/a.out+0x400be6) in factorize(int, int*)
==20465==ABORTING
or this one:
=================================================================
==20463==ERROR: AddressSanitizer: stack-buffer-underflow on address
0x7fff54492d01 at pc 0x000000400be4 bp 0x7fff54492c80 sp 0x7fff54492c78
WRITE of size 4 at 0x7fff54492d01 thread T0
#0 0x400be3 in factorize(int, int*) (/home/msebor/build/tmp/a.out+0x400be3)
#1 0x400d19 in main (/home/msebor/build/tmp/a.out+0x400d19)
#2 0x7faa9866c57f in __libc_start_main (/lib64/libc.so.6+0x2057f)
#3 0x4009a8 in _start (/home/msebor/build/tmp/a.out+0x4009a8)
Address 0x7fff54492d01 is located in stack of thread T0 at offset 1 in frame
#0 0x400c8c in main (/home/msebor/build/tmp/a.out+0x400c8c)
This frame has 1 object(s):
[32, 232) 'fact'
HINT: this may be a false positive if your program uses some custom stack
unwind mechanism or swapcontext
(longjmp and C++ exceptions *are* supported)
SUMMARY: AddressSanitizer: stack-buffer-underflow
(/home/msebor/build/tmp/a.out+0x400be3) in factorize(int, int*)
Shadow bytes around the buggy address:
0x10006a88a550: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x10006a88a560: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x10006a88a570: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x10006a88a580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x10006a88a590: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x10006a88a5a0:[f1]f1 f1 f1 00 00 00 00 00 00 00 00 00 00 00 00
0x10006a88a5b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 f4 f4 f4
0x10006a88a5c0: f3 f3 f3 f3 00 00 00 00 00 00 00 00 00 00 00 00
0x10006a88a5d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x10006a88a5e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x10006a88a5f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Shadow byte legend (one shadow byte represents 8 application bytes):
Addressable: 00
Partially addressable: 01 02 03 04 05 06 07
Heap left redzone: fa
Heap right redzone: fb
Freed heap region: fd
Stack left redzone: f1
Stack mid redzone: f2
Stack right redzone: f3
Stack partial redzone: f4
Stack after return: f5
Stack use after scope: f8
Global redzone: f9
Global init order: f6
Poisoned by user: f7
Container overflow: fc
Array cookie: ac
Intra object redzone: bb
ASan internal: fe
Left alloca redzone: ca
Right alloca redzone: cb
==20463==ABORTING
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From: "zsojka at seznam dot cz" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/70509] wrong code with extract from a v64qi
Date: Sat, 02 Apr 2016 19:54:00 -0000
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--- Comment #2 from Zdenek Sojka <zsojka at seznam dot cz> ---
(In reply to Zdenek Sojka from comment #0)
> First broken dump seems to be .forwprop, where is:
.forwprop4 , that is. The problem might be that simplify_bitfield_ref() does:
tree-ssa-forwprop.c
...
1793: index = build_int_cst (TREE_TYPE (TREE_TYPE (m)), idx * size);
...
which builds the index of type "unsigned char", which wraps around from 256 to
0.
Is there any reason to have index of type "TREE_TYPE (TREE_TYPE (m))" in that
statement? or am I reading the code incorrectly?
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Subject: [Bug bootstrap/70173] make distclean: leaves stage_final and libcc1/compiler-name.h
Date: Sun, 03 Apr 2016 01:47:00 -0000
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-03
CC| |segher at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #3 from Segher Boessenkool <segher at gcc dot gnu.org> ---
It also leaves gnattools/config.cache and an empty gotools/ .
Confirmed.
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Subject: [Bug target/70416] [SH]: error: 'asm' operand requires impossible reload when building ruby2.3
Date: Sun, 03 Apr 2016 03:33:00 -0000
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--- Comment #23 from Oleg Endo <olegendo at gcc dot gnu.org> ---
(In reply to Oleg Endo from comment #21)
> I'll see if there's some other way...
With the patch below, I get
sum: 3342539 -> 3342639 +100 / +0.002992 %
for the CSiBE set. The increases are because r14 is used as an alias for r15
and the extra checks in the pattern only look for r15. However, it seems that
for most cases it's good enough the code size increases as mentioned in comment
#18.
I guess the proper solution for this issue would be running an
address-mode-selection optimization pass after reload to fix up the reload
choices. Probably it would also be beneficial when using LRA.
I'm now re-testing the patch on sh-elf.
Index: gcc/config/sh/sh.md
===================================================================
--- gcc/config/sh/sh.md (revision 234506)
+++ gcc/config/sh/sh.md (working copy)
@@ -2242,14 +2242,23 @@
[(set_attr "type" "arith")])
;; Old reload might generate add insns directly (not through the expander) for
-;; the memory address of complex insns like atomic insns when reloading.
+;; address register calculations when reloading, in which case it won't try
+;; the addsi_scr pattern. Because reload will sometimes try to validate
+;; the generated insns and their constraints, this pattern must be
+;; recognizable during and after reload. However, when reload generates
+;; address register calculations for the stack pointer, we don't allow this
+;; pattern. This will make reload prefer using indexed @(reg + reg) address
+;; modes when the displacement of a @(disp + reg) doesn't fit.
(define_insn_and_split "*addsi3"
[(set (match_operand:SI 0 "arith_reg_dest" "=r")
(plus:SI (match_operand:SI 1 "arith_reg_operand" "r")
(match_operand:SI 2 "arith_or_int_operand" "rn")))]
"TARGET_SH1 && !sh_lra_p ()
- && reload_completed
- && !reg_overlap_mentioned_p (operands[0], operands[1])"
+ && (reload_completed || reload_in_progress)
+ && !reg_overlap_mentioned_p (operands[0], operands[1])
+ && (!reload_in_progress
+ || ((!REG_P (operands[1]) || REGNO (operands[1]) != SP_REG)
+ && (!REG_P (operands[2]) || REGNO (operands[2]) != SP_REG)))"
"#"
"&& 1"
[(set (match_dup 0) (plus:SI (match_dup 0) (match_dup 2)))]
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--- Comment #3 from Marc Glisse <glisse at gcc dot gnu.org> ---
(In reply to Zdenek Sojka from comment #2)
> (In reply to Zdenek Sojka from comment #0)
> > First broken dump seems to be .forwprop, where is:
>
> .forwprop4 , that is. The problem might be that simplify_bitfield_ref() does:
> tree-ssa-forwprop.c
> ...
> 1793: index = build_int_cst (TREE_TYPE (TREE_TYPE (m)), idx * size);
> ...
>
> which builds the index of type "unsigned char", which wraps around from 256
> to 0.
> Is there any reason to have index of type "TREE_TYPE (TREE_TYPE (m))" in
> that statement?
Rereading this a few years later, I have no idea why I used that type.
bitsize_int would make more sense...
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Subject: [Bug target/67391] [SH] Convert clrt addc to normal add insn
Date: Sun, 03 Apr 2016 04:40:00 -0000
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--- Comment #34 from Oleg Endo <olegendo at gcc dot gnu.org> ---
The patches for this PR (r228176, r228201) have triggered PR 70416.
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Subject: [Bug preprocessor/70518] New: Conditional compilation of #line directives
Date: Sun, 03 Apr 2016 06:05:00 -0000
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Bug ID: 70518
Summary: Conditional compilation of #line directives
Product: gcc
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Created attachment 38167
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template file
I am generating C code based on a template file. The result has #line
directives that switch between the template and the generated code. If any of
those #line directives appear within a disabled #if-block, then they are
currently being skipped. This leads to weird behavior and misleading error
messages.
Let me explain my setup. (It's actually from an old fork of Bison.) The
template file consists of blocks of text delimited by "$". These blocks are
inserted into the generated code, with #line directives before and after.
Block 1 contains an #if. Block 2 contains the matching #endif, followed by
something that depends on the line number. I've added two examples, one that
causes a compile error (for the file:line in the error message), and one that
uses __FILE__ and __LINE__. Block 3 is extra padding.
Here is main.c (generated) with the first two blocks inserted from the
template, and the #if disabled:
#include <stdio.h>
#define FOO 0
int main(int argc, char *argv[])
{
#line 2 "template.c" /* start block 1 */
#if FOO
#line 8 "main.c" /* end block 1 */
int foo;
int bar;
#line 4 "template.c" /* start block 2 */
#endif
int oops[-1];
printf("%s:%d\n", __FILE__, __LINE__);
#line 15 "main.c" /* end block 2 */
return 0;
}
Because the #if is disabled, it is interpreting the location of "oops" to be
template.c:8 (from "start block 1" plus 6 lines) instead of its actual location
at template.c:5 (equal to "start block 2" plus 1 line)
And consistent with that, __FILE__ and __LINE__ on the next line are
template.c:9 instead of template.c:6.
Should #line be processed unconditionally? I know the preprocessor has to keep
track of nested #if blocks so that it can find the matching #endif when the
block is disabled. This seems like a corner case that I don't know if the C
standard ever considers. If so, it may simplify the next part.
The bug: Misleading error messages. It opens template.c and prints line 8
from it (assuming this file exists and has at least 8 lines). It's not the
offending line; it could be any text:
template.c: In function ‘main’:
template.c:8:6: error: size of array ‘oops’ is negative
/* template.c line 8 */
^
Also note the "In function ‘main’" message is using template.c instead of the
actual file that main appears in (main.c) and that __FILE__ is set to at the
start of its definition.
Somehow clang prints out the right offending statement but keeps the
"template.c:8" text:
template.c:8:11: error: 'oops' declared as an array with a negative size
int oops[-1];
^~
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--- Comment #1 from Kyle Guinn <elyk03 at gmail dot com> ---
Created attachment 38168
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generated code
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Subject: [Bug c++/70514] Variable length arrays lead to garbage in another array
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--- Comment #3 from Chris Warrick <kwpolska at gmail dot com> ---
Well, that is a typo. But would writing past the limits really have such
unusual effects? And why does clang++ not crash?
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Subject: [Bug target/70510] ICE: output_operand: invalid %-code with -mavx512bw -masm=intel when emitting vpbroatcast
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Kirill Yukhin <kyukhin at gcc dot gnu.org> changed:
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--- Comment #1 from Kirill Yukhin <kyukhin at gcc dot gnu.org> ---
will take a look.
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Subject: [Bug target/64393] ICE: in extract_insn, at recog.c:2327 (unrecognizable insn) with -mavx512vbmi
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Done
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Subject: [Bug tree-optimization/70509] wrong code with extract from a v64qi
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--- Comment #4 from Zdenek Sojka <zsojka at seznam dot cz> ---
(In reply to Marc Glisse from comment #3)
> Rereading this a few years later, I have no idea why I used that type.
> bitsize_int would make more sense...
I've already tried this:
--- gcc/tree-ssa-forwprop.c (revision 234698)
+++ gcc/tree-ssa-forwprop.c (working copy)
@@ -1773,7 +1773,7 @@
if (code == VEC_PERM_EXPR)
{
- tree p, m, index, tem;
+ tree p, m, tem;
unsigned nelts;
m = gimple_assign_rhs3 (def_stmt);
if (TREE_CODE (m) != VECTOR_CST)
@@ -1790,9 +1790,8 @@
p = gimple_assign_rhs2 (def_stmt);
idx -= nelts;
}
- index = build_int_cst (TREE_TYPE (TREE_TYPE (m)), idx * size);
tem = build3 (BIT_FIELD_REF, TREE_TYPE (op),
- unshare_expr (p), op1, index);
+ unshare_expr (p), op1, bitsize_int(idx * size));
gimple_assign_set_rhs1 (stmt, tem);
fold_stmt (gsi);
update_stmt (gsi_stmt (*gsi));
x86_64 bootstrap finished (the code is likely not triggered), regtest running.
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--- Comment #5 from Zdenek Sojka <zsojka at seznam dot cz> ---
(In reply to Zdenek Sojka from comment #4)
> x86_64 bootstrap finished (the code is likely not triggered), regtest
> running.
It also fixes several wrong-code testcases that I failed to reduce to a
reasonable size, thus were unreported. During testcase reduction, there started
to be out-of-bounds vector indexes, that I fail to detect (with
-fsanitize=undefined).
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Subject: [Bug tree-optimization/70509] wrong code with extract from a v64qi
Date: Sun, 03 Apr 2016 08:23:00 -0000
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--- Comment #6 from Marc Glisse <glisse at gcc dot gnu.org> ---
(In reply to Zdenek Sojka from comment #5)
> It also fixes several wrong-code testcases that I failed to reduce to a
> reasonable size, thus were unreported.
Nice. While you are looking at those values that don't fit anymore with AVX512,
there is one place I forgot when I patched the neighbors in simplify-rtx.c:3668
if (sel & (1 << UINTVAL (j)))
The 1 is supposed to be HOST_WIDE_INT_1U.
(IIRC we will be in trouble if there is ever an AVX1024 with vectors of chars,
as even hwi will be too small...)
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Subject: [Bug tree-optimization/70509] wrong code with extract from a v64qi
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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> ---
(In reply to Zdenek Sojka from comment #4)
> (In reply to Marc Glisse from comment #3)
> > Rereading this a few years later, I have no idea why I used that type.
> > bitsize_int would make more sense...
>
> I've already tried this:
> - index = build_int_cst (TREE_TYPE (TREE_TYPE (m)), idx * size);
> tem = build3 (BIT_FIELD_REF, TREE_TYPE (op),
> - unshare_expr (p), op1, index);
> + unshare_expr (p), op1, bitsize_int(idx * size));
Please put space in between bitsize_int and (. Otherwise LGTM, but testcase
needs to be added too, see how testsuite/gcc.target/i386/avx512bw-*.c dg-do run
tests look like. Please post to gcc-patches once you have that.
- if (sel & (1 << UINTVAL (j)))
+ if (sel & (HOST_WIDE_INT_1U << UINTVAL (j)))
change in simplify-rtx.c is preapproved, but it would be nice to have a
testcase.
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Subject: [Bug c++/70514] Variable length arrays lead to garbage in another array
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
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--- Comment #4 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
(In reply to Chris Warrick from comment #3)
> Well, that is a typo. But would writing past the limits really have such
> unusual effects? And why does clang++ not crash?
Chance? https://gcc.gnu.org/wiki/FAQ#undefinedbut
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Subject: [Bug c++/70514] Variable length arrays lead to garbage in another array
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--- Comment #5 from Chris Warrick <kwpolska at gmail dot com> ---
Thanks for debugging my code, and sorry for wasting time.
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Subject: [Bug preprocessor/70518] Conditional compilation of #line directives
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
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--- Comment #2 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
(In reply to Kyle Guinn from comment #0)
> Should #line be processed unconditionally? I know the preprocessor has to
> keep track of nested #if blocks so that it can find the matching #endif when
> the block is disabled. This seems like a corner case that I don't know if
> the C standard ever considers. If so, it may simplify the next part.
I would be surprised if GCC and Clang are not following the standard here,
since #line also determines __FILE__ and __LINE__.
> The bug: Misleading error messages. It opens template.c and prints line 8
> from it (assuming this file exists and has at least 8 lines). It's not the
> offending line; it could be any text:
Well, it is the line that the file tells gcc to look up. A work-around would be
to reset #line to the proper place after the #endif.
> Also note the "In function ‘main’" message is using template.c instead of
> the actual file that main appears in (main.c) and that __FILE__ is set to at
> the start of its definition.
Indeed that looks wrong to me. Perhaps worth opening a different PR to track
that issue.
> Somehow clang prints out the right offending statement but keeps the
> "template.c:8" text:
Probably it keeps track of both the "preprocessor" location and the actual
source location. Not sure how it does that efficiently or if there is some
other heuristic involved. GCC is quite far away from being able to do that.
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Subject: [Bug c++/70514] Variable length arrays lead to garbage in another array
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--- Comment #6 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
(In reply to Chris Warrick from comment #5)
> Thanks for debugging my code, and sorry for wasting time.
No problem. It is a pity that GCC static analysis capabilities are not powerful
enough to catch this case, but -fsanitize is your friend. Perhaps useful:
https://gcc.gnu.org/wiki/FAQ#misoptimization
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--- Comment #35 from Oleg Endo <olegendo at gcc dot gnu.org> ---
Author: olegendo
Date: Sun Apr 3 12:50:54 2016
New Revision: 234702
URL: https://gcc.gnu.org/viewcvs?rev=234702&root=gcc&view=rev
Log:
gcc/
PR target/70416
PR target/67391
* config/sh/sh.md (*addsi3): Allow pattern when reload_in_progress is
set, but not for SP_REG operands.
gcc/testsuite/
PR target/70416
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* gcc.target/sh/torture/pr70416.c: New.
Added:
trunk/gcc/testsuite/gcc.target/sh/torture/pr70416.c
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trunk/gcc/ChangeLog
trunk/gcc/config/sh/sh.md
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug target/70416] [SH]: error: 'asm' operand requires impossible reload when building ruby2.3
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--- Comment #24 from Oleg Endo <olegendo at gcc dot gnu.org> ---
Author: olegendo
Date: Sun Apr 3 12:50:54 2016
New Revision: 234702
URL: https://gcc.gnu.org/viewcvs?rev=234702&root=gcc&view=rev
Log:
gcc/
PR target/70416
PR target/67391
* config/sh/sh.md (*addsi3): Allow pattern when reload_in_progress is
set, but not for SP_REG operands.
gcc/testsuite/
PR target/70416
PR target/67391
* gcc.target/sh/torture/pr70416.c: New.
Added:
trunk/gcc/testsuite/gcc.target/sh/torture/pr70416.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/sh/sh.md
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-520972-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 03 12:58:18 2016
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Subject: [Bug target/70416] [SH]: error: 'asm' operand requires impossible reload when building ruby2.3
Date: Sun, 03 Apr 2016 12:58:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70416
--- Comment #25 from Oleg Endo <olegendo at gcc dot gnu.org> ---
Tests on sh-elf looked good. I'll wait for the nightly sh4-linux test results
and backport the patch to GCC 5.
>From gcc-bugs-return-520973-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 03 13:25:23 2016
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From: "manu at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/70173] make distclean: leaves stage_final and libcc1/compiler-name.h
Date: Sun, 03 Apr 2016 13:25:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70173
Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |manu at gcc dot gnu.org
--- Comment #4 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
See also PR45503
(In reply to Eric Gallager from comment #2)
> (In reply to Andrew Pinski from comment #1)
> > Most people don't use distclean or build in the source directory. Most
> > people use a separate build directory and just wipe out that build directory.
>
> I use a separate build directory, but I also use make distclean, and I've
> also noticed the issue described in this bug, I just never got around to
> filing it. If gcc is going to provide a distclean target, it should DTRT.
Indeed. I also do not understand why the build system does not clearly forbid
from building in the source directory since that is clearly not supported.
>From gcc-bugs-return-520974-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 03 13:54:19 2016
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From: "manu at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/44949] extend Wparentheses from & to &Date: Sun, 03 Apr 2016 13:54:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=44949
Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-03
CC| |manu at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #2 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
(In reply to Marc Glisse from comment #1)
> Created attachment 24935 [details]
> hack
>
> It is an easy enough hack to call the Wparentheses code for &= and others
> (the warning says "&" instead of "&=", it isn't a clean patch) so I can test
> on real code. And it seems painful. It warns on code like: a |= b & c; where
> it is quite clear we could never intend (a|=b)&c;. Restricting the warning
> to the case where the result of the expression is used should improve
> things, except that I don't know how to access that information...
I think the problem cannot be solved like this because assignment operators
have a different precedence than their non-assignment equivalents. That is,
i&=c|b;
i = i & c|b;
are not equivalent. Do you want to warn about the above?
It would probably help you to create a very long testcase listing everything
you wish to warn and not warn about, then start from a new function instead
from warn_about_parentheses. If it turns out that some parts can be shared,
then great. (In any case, the warnings in warn_about_parentheses are very
clumsy and obscure: Clang provides a better explanation about what is wrong and
how to fix it, so starting from scratch seems better).
It may also be worth looking at the point where we give:
case MODIFY_EXPR:
if (!TREE_NO_WARNING (expr)
&& warn_parentheses)
{
warning (OPT_Wparentheses,
"suggest parentheses around assignment used as truth
value");
TREE_NO_WARNING (expr) = 1;
}
break;
since it may be the point to catch most of:
if (i&=2 == 0)
but you may need to revert the hack done here:
if (code == NOP_EXPR)
ret.original_code = MODIFY_EXPR;
else
{
TREE_NO_WARNING (ret.value) = 1;
ret.original_code = ERROR_MARK;
}
and devise a way to keep the info that this was originally more than an
assignment operator (set ret.original_code to BIT_AND_EXPR, etc ?).
>From gcc-bugs-return-520975-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 03 13:58:21 2016
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From: "jason.vas.dias at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/70519] New: genmatch fails to compile under gcc-5.2.0 - missing '-lstdc++' .
Date: Sun, 03 Apr 2016 13:58:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70519
Bug ID: 70519
Summary: genmatch fails to compile under gcc-5.2.0 - missing
'-lstdc++' .
Product: gcc
Version: 5.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
Assignee: unassigned at gcc dot gnu.org
Reporter: jason.vas.dias at gmail dot com
Target Milestone: ---
I am trying to build gcc-5.3.0 with gcc-5.2.0 , on an x86-64 (Haswell) Linux
box, and am getting this unexpected compilation failure building the unmodified
gcc-5.3.0 source after configuration, with 'make' :
<quote><pre>
/usr/build/linux/gcc-5.3.0/./prev-gcc/xg++
-B/usr/build/linux/gcc-5.3.0/./prev-gcc/ -B/usr/x86_64-pc-linux-gnu/bin/
-nostdinc++
-B/usr/build/linux/gcc-5.3.0/prev-x86_64-pc-linux-gnu/libstdc++-v3/src/.libs
-B/usr/build/linux/gcc-5.3.0/prev-x86_64-pc-linux-gnu/libstdc++-v3/libsupc++/.libs
-I/usr/build/linux/gcc-5.3.0/prev-x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu
-I/usr/build/linux/gcc-5.3.0/prev-x86_64-pc-linux-gnu/libstdc++-v3/include
-I/usr/os_src/gcc-5.3.0/libstdc++-v3/libsupc++
-L/usr/build/linux/gcc-5.3.0/prev-x86_64-pc-linux-gnu/libstdc++-v3/src/.libs
-L/usr/build/linux/gcc-5.3.0/prev-x86_64-pc-linux-gnu/libstdc++-v3/libsupc++/.libs
-g -O2 -gtoggle -DIN_GCC -fno-exceptions -fno-rtti
-fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings
-Wcast-qual -Wmissing-format-attribute -Woverloaded-virtual -pedantic
-Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -DHAVE_CONFIG_H
-DGENERATOR_FILE -static-libstdc++ -static-libgcc -o build/genmatch \
build/genmatch.o ../libcpp/libcpp.a ../libiberty/libiberty.a build/errors.o
build/vec.o build/hash-table.o .././libiberty/libiberty.a
build/genmatch.o: In function `lower_cond(operand*) [clone .constprop.91]':
genmatch.c:(.text+0xc7a): undefined reference to `operator new(unsigned long)'
genmatch.c:(.text+0xe2e): undefined reference to `operator new(unsigned long)'
genmatch.c:(.text+0x125d): undefined reference to `operator new(unsigned long)'
genmatch.c:(.text+0x146b): undefined reference to `operator new(unsigned long)'
genmatch.c:(.text+0x15ef): undefined reference to `operator new(unsigned long)'
build/genmatch.o:genmatch.c:(.text+0x17b5): more undefined references to
`operator new(unsigned long)' follow
build/genmatch.o: In function `main':
genmatch.c:(.text.startup+0x6015): undefined reference to `operator
delete(void*)'
genmatch.c:(.text.startup+0x60d6): undefined reference to `operator
new(unsigned long)'
genmatch.c:(.text.startup+0x6148): undefined reference to `operator
new(unsigned long)'
collect2: error: ld returned 1 exit status
Makefile:2613: recipe for target 'build/genmatch' failed
</pre></quote>
Adding '-lstdc++' to the xg++ command above enables it to succeed .
Why the missing '-lstdc++' ? Intentional ? An error ?
Only when compiling under 5.2.0 ?
I can check in a Makefile.in patch if it would help ...
>From gcc-bugs-return-520976-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 03 14:06:34 2016
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Subject: [Bug c++/70336] [5/6 regression] Incorrect Wconversion warning
Date: Sun, 03 Apr 2016 14:06:00 -0000
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Patrick Palka <ppalka at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ppalka at gcc dot gnu.org
--- Comment #2 from Patrick Palka <ppalka at gcc dot gnu.org> ---
Another test case:
void bla(unsigned char buffer, int offset)
{
buffer = buffer | (unsigned char)(offset & 255);
}
GCC 5/6 warn, 4.9 doesn't.
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From: "jason.vas.dias at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/70519] genmatch fails to compile under gcc-5.2.0 - missing '-lstdc++' .
Date: Sun, 03 Apr 2016 14:10:00 -0000
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--- Comment #1 from Jason Vas Dias <jason.vas.dias at gmail dot com> ---
And it happens for gcov also:
<quote><pre>
/usr/build/linux/gcc-5.3.0/./prev-gcc/xg++
-B/usr/build/linux/gcc-5.3.0/./prev-gcc/ -B/usr/x86_64-pc-linux-gnu/bin/
-nostdinc++
-B/usr/build/linux/gcc-5.3.0/prev-x86_64-pc-linux-gnu/libstdc++-v3/src/.libs
-B/usr/build/linux/gcc-5.3.0/prev-x86_64-pc-linux-gnu/libstdc++-v3/libsupc++/.libs
-I/usr/build/linux/gcc-5.3.0/prev-x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu
-I/usr/build/linux/gcc-5.3.0/prev-x86_64-pc-linux-gnu/libstdc++-v3/include
-I/usr/os_src/gcc-5.3.0/libstdc++-v3/libsupc++
-L/usr/build/linux/gcc-5.3.0/prev-x86_64-pc-linux-gnu/libstdc++-v3/src/.libs
-L/usr/build/linux/gcc-5.3.0/prev-x86_64-pc-linux-gnu/libstdc++-v3/libsupc++/.libs
-g -O2 -gtoggle -DIN_GCC -fno-exceptions -fno-rtti
-fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings
-Wcast-qual -Wmissing-format-attribute -Woverloaded-virtual -pedantic
-Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -DHAVE_CONFIG_H
-static-libstdc++ -static-libgcc gcov.o libcommon.a ../libcpp/libcpp.a
../libbacktrace/.libs/libbacktrace.a ../libiberty/libiberty.a
../libdecnumber/libdecnumber.a -o gcov
libcommon.a(pretty-print.o): In function `pretty_printer::~pretty_printer()':
pretty-print.c:(.text+0x1ce): undefined reference to `operator delete(void*)'
libcommon.a(input.o): In function `diagnostic_file_cache_init() [clone
.part.5]':
input.c:(.text+0x1da): undefined reference to `operator new[](unsigned long)'
libcommon.a(input.o): In function `diagnostic_file_cache_fini()':
input.c:(.text+0x88d): undefined reference to `operator delete[](void*)'
collect2: error: ld returned 1 exit status
Makefile:2673: recipe for target 'gcov' failed
make[3]: *** [gcov] Error 1
make[3]: *** Waiting for unfinished jobs....
make[3]: Leaving directory '/usr/build/linux/gcc-5.3.0/gcc'
Makefile:4411: recipe for target 'all-stage2-gcc' failed
make[2]: *** [all-stage2-gcc] Error 2
make[2]: Leaving directory '/usr/build/linux/gcc-5.3.0'
Makefile:21905: recipe for target 'stage2-bubble' failed
make[1]: *** [stage2-bubble] Error 2
make[1]: Leaving directory '/usr/build/linux/gcc-5.3.0'
Makefile:902: recipe for target 'all' failed
make: *** [all] Error 2
[root@[Linux]:/usr/build/linux/gcc-5.3.0 [5067] 14:07:38 #:111!:1990]
$ cd gcc
[root@[Linux]:/usr/build/linux/gcc-5.3.0/gcc [5067] 14:08:10 #:112!:1991]
$ /usr/build/linux/gcc-5.3.0/./prev-gcc/xg++
-B/usr/build/linux/gcc-5.3.0/./prev-gcc/ -B/usr/x86_64-pc-linux-gnu/bin/
-nostdinc++
-B/usr/build/linux/gcc-5.3.0/prev-x86_64-pc-linux-gnu/libstdc++-v3/src/.libs
-B/usr/build/linux/gcc-5.3.0/prev-x86_64-pc-linux-gnu/libstdc++-v3/libsupc++/.libs
-I/usr/build/linux/gcc-5.3.0/prev-x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu
-I/usr/build/linux/gcc-5.3.0/prev-x86_64-pc-linux-gnu/libstdc++-v3/include
-I/usr/os_src/gcc-5.3.0/libstdc++-v3/libsupc++
-L/usr/build/linux/gcc-5.3.0/prev-x86_64-pc-linux-gnu/libstdc++-v3/src/.libs
-L/usr/build/linux/gcc-5.3.0/prev-x86_64-pc-linux-gnu/libstdc++-v3/libsupc++/.libs
-g -O2 -gtoggle -DIN_GCC -fno-exceptions -fno-rtti
-fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings
-Wcast-qual -Wmissing-format-attribute -Woverloaded-virtual -pedantic
-Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -DHAVE_CONFIG_H
-static-libstdc++ -static-libgcc gcov.o libcommon.a ../libcpp/libcpp.a
../libbacktrace/.libs/libbacktrace.a ../libiberty/libiberty.a
../libdecnumber/libdecnumber.a -o gcov
libcommon.a(pretty-print.o): In function `pretty_printer::~pretty_printer()':
pretty-print.c:(.text+0x1ce): undefined reference to `operator delete(void*)'
libcommon.a(input.o): In function `diagnostic_file_cache_init() [clone
.part.5]':
input.c:(.text+0x1da): undefined reference to `operator new[](unsigned long)'
libcommon.a(input.o): In function `diagnostic_file_cache_fini()':
input.c:(.text+0x88d): undefined reference to `operator delete[](void*)'
collect2: error: ld returned 1 exit status
[root@[Linux]:/usr/build/linux/gcc-5.3.0/gcc [5067] 14:08:21 #:113!:1992]
$ /usr/build/linux/gcc-5.3.0/./prev-gcc/xg++
-B/usr/build/linux/gcc-5.3.0/./prev-gcc/ -B/usr/x86_64-pc-linux-gnu/bin/
-nostdinc++
-B/usr/build/linux/gcc-5.3.0/prev-x86_64-pc-linux-gnu/libstdc++-v3/src/.libs
-B/usr/build/linux/gcc-5.3.0/prev-x86_64-pc-linux-gnu/libstdc++-v3/libsupc++/.libs
-I/usr/build/linux/gcc-5.3.0/prev-x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu
-I/usr/build/linux/gcc-5.3.0/prev-x86_64-pc-linux-gnu/libstdc++-v3/include
-I/usr/os_src/gcc-5.3.0/libstdc++-v3/libsupc++
-L/usr/build/linux/gcc-5.3.0/prev-x86_64-pc-linux-gnu/libstdc++-v3/src/.libs
-L/usr/build/linux/gcc-5.3.0/prev-x86_64-pc-linux-gnu/libstdc++-v3/libsupc++/.libs
-g -O2 -gtoggle -DIN_GCC -fno-exceptions -fno-rtti
-fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings
-Wcast-qual -Wmissing-format-attribute -Woverloaded-virtual -pedantic
-Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -DHAVE_CONFIG_H
-static-libstdc++ -static-libgcc gcov.o libcommon.a ../libcpp/libcpp.a
../libbacktrace/.libs/libbacktrace.a ../libiberty/libiberty.a
../libdecnumber/libdecnumber.a -o gcov -lstdc++
[root@[Linux]:/usr/build/linux/gcc-5.3.0/gcc [5067] 14:08:33 #:114!:1993]
$ echo $?
0
</pre></quote>
>From gcc-bugs-return-520978-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 03 14:19:54 2016
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From: "jason.vas.dias at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/70519] genmatch fails to compile under gcc-5.2.0 - missing '-lstdc++' .
Date: Sun, 03 Apr 2016 14:19:00 -0000
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--- Comment #2 from Jason Vas Dias <jason.vas.dias at gmail dot com> ---
In fact, it happens for EVERY executable produced by stage2 compiler!
Why is this - do I need to add '-lstdc++' to LDFLAGS or to
--with-stage1-ldflags / --with-boot-ldflags in order to build gcc-5.3.0 ?
>From gcc-bugs-return-520979-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 03 14:20:57 2016
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Subject: [Bug testsuite/70520] New: Incorrect child stack alignment in c-c++-common/asan/clone-test-1.c
Date: Sun, 03 Apr 2016 14:20:00 -0000
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Bug ID: 70520
Summary: Incorrect child stack alignment in
c-c++-common/asan/clone-test-1.c
Product: gcc
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c-c++-common/asan/clone-test-1.c has
int main(int argc, char **argv) {
int i;
const int kStackSize = 1 << 20;
char child_stack[kStackSize + 1];
char *sp = child_stack + kStackSize; /* Stack grows down. */
printf("Parent: %p\n", sp);
pid_t clone_pid = clone(Child, sp, CLONE_FILES | CLONE_VM, NULL, 0, 0, 0);
There is no guarantee that "sp" will be aligned at 16 bytes, which
is required by x86 psABIs.
>From gcc-bugs-return-520980-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 03 14:24:56 2016
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Subject: [Bug testsuite/70520] Incorrect child stack alignment in c-c++-common/asan/clone-test-1.c
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--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
Also see:
https://llvm.org/bugs/show_bug.cgi?id=27191
>From gcc-bugs-return-520981-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 03 14:32:40 2016
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Subject: [Bug fortran/65795] Segfault (invalid write) for ALLOCATE statement involving COARRAYS
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vehre at gcc dot gnu.org changed:
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--- Comment #3 from vehre at gcc dot gnu.org ---
Initial patch submitted:
https://gcc.gnu.org/ml/fortran/2016-04/msg00009.html
awaiting review.
>From gcc-bugs-return-520982-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 03 15:13:02 2016
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Subject: [Bug middle-end/70457] ICE (segfault) in gimple_expand_builtin_pow on powerpc64le-linux-gnu
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--- Comment #11 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Jakub, thanks, I've verified that works and makes for a much better patch.
Will post shortly on gcc-patches.
>From gcc-bugs-return-520983-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 03 15:22:32 2016
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Subject: [Bug target/54700] Optimize away x<0 as mask argument of a blend.
Date: Sun, 03 Apr 2016 15:22:00 -0000
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--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
This was missing a simple testcase, but now we can write one (in C++):
typedef int vec __attribute__((vector_size(32)));
vec f(vec x){
return x<0?2:1;
}
vpxor %xmm1, %xmm1, %xmm1
vpcmpgtd %ymm0, %ymm1, %ymm1
vmovdqa .LC1(%rip), %ymm0
vpblendvb %ymm1, .LC0(%rip), %ymm0, %ymm0
IIUC, we could skip vpcmpgtd and pass ymm0 directly to vpblendvb.
>From gcc-bugs-return-520984-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 03 16:12:24 2016
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Subject: [Bug fortran/66911] ICE on allocate character with source as a derived type component
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--- Comment #7 from vehre at gcc dot gnu.org ---
For 6.0 the pr is fixed already.
For gcc-5 a patch is available in:
https://gcc.gnu.org/ml/fortran/2016-04/msg00010.html
awaiting review.
>From gcc-bugs-return-520985-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 03 16:14:26 2016
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Subject: [Bug fortran/67538] ICE with invalid source allocation
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vehre at gcc dot gnu.org changed:
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--- Comment #4 from vehre at gcc dot gnu.org ---
Patch submitted as:
https://gcc.gnu.org/ml/fortran/2016-04/msg00011.html
awaiting review.
>From gcc-bugs-return-520986-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 03 17:02:22 2016
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From: "vehre at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/69659] [6 Regression] ICE on using option -frepack-arrays, in gfc_conv_descriptor_data_get
Date: Sun, 03 Apr 2016 17:02:00 -0000
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vehre at gcc dot gnu.org changed:
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--- Comment #5 from vehre at gcc dot gnu.org ---
Created attachment 38169
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38169&action=edit
Patch proposal to fix the ICE.
Hi Gerhard,
although I am doing gfortran bugfixing for quite some time now, I haven't done
the "validation run with option -frepack-arrays" yet. I found that I could add
RUNTESTFLAGS="--target_board=unix/-frepack-arrays"
to the make check-fortran run, but this presents me with a multitude of failing
testcases. So obviously I am doing something wrong.
Attached is a patch that fixes the issue for some of the testcases you
enumerated in comment #1. I haven't busied myself to check each of the
testcases, but picked about 5 from the list and checked, that the patch fixes
the issue.
Can you confirm that the patch fixes the issue in all cases and does not raise
new issues?
Regards,
Andre
>From gcc-bugs-return-520987-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 03 18:53:50 2016
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From: "glaubitz at physik dot fu-berlin.de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/70416] [SH]: error: 'asm' operand requires impossible reload when building ruby2.3
Date: Sun, 03 Apr 2016 18:53:00 -0000
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--- Comment #26 from John Paul Adrian Glaubitz <glaubitz at physik dot fu-berlin.de> ---
(In reply to Oleg Endo from comment #23)
> I guess the proper solution for this issue would be running an
> address-mode-selection optimization pass after reload to fix up the reload
> choices. Probably it would also be beneficial when using LRA.
Compiling with -mlra did indeed help, however as seen in comment #9, it
triggered a different compiler bug. Workaround was to compile just vm.c with
-mlra, the rest without.
Adrian
>From gcc-bugs-return-520988-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 03 20:46:56 2016
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Subject: [Bug c/65403] -Wno-error=<not implemented> is an error
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
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--- Comment #6 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #5)
> -Werror=unknown-warning should not be ignored, as -Werror=unknown-warning
> implies also -Wunknown-warning (unlike -Wno-error=, which doesn't imply
> anything).
Are you talking about my patch in comment #4? I think it doesn't ignore
-Werror=unknown-warning See the hunk in opts.c.
>From gcc-bugs-return-520989-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 03 21:30:29 2016
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From: "meiomorphism at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70521] New: [C++14] nonempty constexpr noexcept constructor rejected
Date: Sun, 03 Apr 2016 21:30:00 -0000
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Bug ID: 70521
Summary: [C++14] nonempty constexpr noexcept constructor
rejected
Product: gcc
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Created attachment 38170
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38170&action=edit
test case
The following code is rejected by gcc 5.2.1.
====
#include <cassert>
struct A
{
int v;
constexpr A() noexcept : v(3) { assert(v != 0); }
};
int main() { }
====
====
$ g++ -std=c++14 err.cpp
err.cpp: In constructor ‘constexpr A::A()’:
err.cpp:6:53: error: member ‘A::v’ must be initialized by mem-initializer in
‘constexpr’ constructor
constexpr A() noexcept : v(3) { assert(v != 0); }
^
err.cpp:5:9: note: declared here
int v;
^
====
The mem-initializer in question is clearly present. clang 3.6.2 and 3.7.0
accept this code without diagnostics.
Removing any of "constexpr", "noexcept", or the "assert()" call results in the
code being accepted.
>From gcc-bugs-return-520990-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 03 21:44:25 2016
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Subject: [Bug c++/70522] New: Hidden friend functions block qualified name lookup into nested unnamed namespace
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This program should compile without error:
namespace N {
struct S {
friend void f(S&) {}
};
namespace {
int f;
}
}
int main() {
N::f = 42;
}
yet GCC 6 diagnoses:
prog.cc: In function 'int main()':
prog.cc:11:5: error: 'f' is not a member of 'N'
N::f = 42;
^
prog.cc:11:5: note: suggested alternative:
prog.cc:6:13: note: 'N::{anonymous}::f'
int f;
^
The program compiles correctly if either the friend declaration of f is
commented out, or the unnamed namespace is made an inline namespace.
Language lawyer justification:
The friend declaration of f is not visible to name lookup of N::f per
[namespace.memdef]/3, so the set of declarations S'(N,f) described in
[namespace.qual]/2 is empty. Name lookup should continue into namespaces
"nominated by using directives" in N; unnamed namespaces are such namespaces
per [namespace.unnamed]/1.
>From gcc-bugs-return-520991-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 03 22:11:39 2016
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Subject: [Bug c/68845] -Werror=array-bounds=[12] doesn't turn warning into error
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Last reconfirmed| |2016-04-03
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--- Comment #5 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
(In reply to Franz Sirl from comment #3)
> Created attachment 37035 [details]
> Alias -Warray-bounds to Warray-bounds=
>
> Tentative patch, no regressions. Please commit if OK, I don't have valid
> credentials anymore.
If you want to see this in GCC 6, you need to get it approved ASAP.
>From gcc-bugs-return-520992-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 03 22:26:26 2016
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Subject: [Bug middle-end/35587] -Warray-bounds does not work at all or does not find all trivial cases, and :works only with -O2 or -O3
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CC| |Gildos at gmail dot com
--- Comment #9 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
*** Bug 57367 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-520993-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 03 22:26:26 2016
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Subject: [Bug c++/57367] Missing warning: array subscript is above array bounds
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=57367
Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
CC| |manu at gcc dot gnu.org
Resolution|--- |DUPLICATE
--- Comment #8 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
A variant that is not optimized out, yet not warned until -O2:
void foo(int *p);
void warning(void)
{
int pippo[100];
pippo[1] = 0;
pippo[100] = 0;
foo(pippo ) ;
}
also Dup.
*** This bug has been marked as a duplicate of bug 35587 ***
>From gcc-bugs-return-520994-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 03 23:07:32 2016
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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/69659] [6 Regression] ICE on using option -frepack-arrays, in gfc_conv_descriptor_data_get
Date: Sun, 03 Apr 2016 23:07:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69659
--- Comment #6 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
I have run
make -k -j8 check-gfortran
RUNTESTFLAGS="--target_board=unix'{-m32/-frepack-arrays,-m64/-frepack-arrays,-m32,-m64}'"
Before the patch, the number of FAILs is 1123, 234 of them being related to
ICES.
After the patch, the number of FAILs is 497, 18 of them being related to ICES.
These unfixed ICEs are related to compilations with -Warray-temporaries, e.g.,
gfortran.dg/dependency_3[56].f90
gfortran.dg/inline_(sum|transpose)_1.f90
and the errors are of kind
in gfc_format_decoder, at fortran/error.c:937
I'll try to fill a new PR for this problem.
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Subject: [Bug middle-end/68933] ICE when mixing "-fprofile-arcs -ftest-coverage" and "-fcoarray=lib"
Date: Sun, 03 Apr 2016 23:44:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68933
--- Comment #2 from Zaak <zbeekman at gmail dot com> ---
I have confirmed this is a problem on OS X as well, although perhaps the
diagnostics are slightly different?
$ /usr/local/bin/gfortran -I/usr/local/homebrew/Cellar/mpich/3.2/include
-fcoarray=lib -fprofile-arcs -ftest-coverage coarray_distributed_transpose.F90
-c -v
Using built-in specs.
COLLECT_GCC=/usr/local/bin/gfortran
Target: x86_64-apple-darwin14.5.0
Configured with: ../configure --build=x86_64-apple-darwin14.5.0
--prefix=/usr/local/homebrew/Cellar/gcc/5.3.0
--libdir=/usr/local/homebrew/Cellar/gcc/5.3.0/lib/gcc/5
--enable-languages=c,c++,objc,obj-c++,fortran --program-suffix=-5
--with-gmp=/usr/local/opt/gmp --with-mpfr=/usr/local/opt/mpfr
--with-mpc=/usr/local/opt/libmpc --with-isl=/usr/local/opt/isl
--with-system-zlib --enable-libstdcxx-time=yes --enable-stage1-checking
--enable-checking=release --enable-lto --with-build-config=bootstrap-debug
--disable-werror --with-pkgversion='Homebrew gcc 5.3.0'
--with-bugurl=https://github.com/Homebrew/homebrew/issues --enable-plugin
--disable-nls --enable-multilib
Thread model: posix
gcc version 5.3.0 (Homebrew gcc 5.3.0)
COLLECT_GCC_OPTIONS='-mmacosx-version-min=10.10.5' '-I'
'/usr/local/homebrew/Cellar/mpich/3.2/include' '-fcoarray=lib' '-fprofile-arcs'
'-ftest-coverage' '-c' '-v' '-mtune=core2'
/usr/local/homebrew/Cellar/gcc/5.3.0/libexec/gcc/x86_64-apple-darwin14.5.0/5.3.0/f951
coarray_distributed_transpose.F90
-cpp=/var/folders/4t/my3vyzsx7pg80tc_cxhyfc7h0000gp/T//ccN09K7q.f90 -quiet -v
-I /usr/local/homebrew/Cellar/mpich/3.2/include -D__DYNAMIC__
coarray_distributed_transpose.F90 -fPIC -quiet -dumpbase
coarray_distributed_transpose.F90 -mmacosx-version-min=10.10.5 -mtune=core2
-auxbase coarray_distributed_transpose -version -fcoarray=lib -fprofile-arcs
-ftest-coverage -fintrinsic-modules-path
/usr/local/homebrew/Cellar/gcc/5.3.0/lib/gcc/5/gcc/x86_64-apple-darwin14.5.0/5.3.0/finclude
-o /var/folders/4t/my3vyzsx7pg80tc_cxhyfc7h0000gp/T//ccK2CN3d.s
GNU Fortran (Homebrew gcc 5.3.0) version 5.3.0 (x86_64-apple-darwin14.5.0)
compiled by GNU C version 5.3.0, GMP version 6.1.0, MPFR version
3.1.3-p2, MPC version 1.0.3
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
ignoring nonexistent directory
"/usr/local/homebrew/Cellar/gcc/5.3.0/lib/gcc/5/gcc/x86_64-apple-darwin14.5.0/5.3.0/../../../../../../x86_64-apple-darwin14.5.0/include"
#include "..." search starts here:
#include <...> search starts here:
/usr/local/homebrew/Cellar/mpich/3.2/include
/usr/local/homebrew/Cellar/gcc/5.3.0/lib/gcc/5/gcc/x86_64-apple-darwin14.5.0/5.3.0/finclude
/usr/local/homebrew/Cellar/gcc/5.3.0/lib/gcc/5/gcc/x86_64-apple-darwin14.5.0/5.3.0/include
/usr/local/include
/usr/local/homebrew/Cellar/gcc/5.3.0/include
/usr/local/homebrew/Cellar/gcc/5.3.0/lib/gcc/5/gcc/x86_64-apple-darwin14.5.0/5.3.0/include-fixed
/usr/include
End of search list.
GNU Fortran2008 (Homebrew gcc 5.3.0) version 5.3.0 (x86_64-apple-darwin14.5.0)
compiled by GNU C version 5.3.0, GMP version 6.1.0, MPFR version
3.1.3-p2, MPC version 1.0.3
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
coarray_distributed_transpose.F90:111:0:
use run_size
^
internal compiler error: Segmentation fault: 11
coarray_distributed_transpose.F90:111:0: internal compiler error: Abort trap: 6
gfortran: internal compiler error: Abort trap: 6 (program f951)
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://github.com/Homebrew/homebrew/issues> for instructions.
>From gcc-bugs-return-520995-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 03 23:44:26 2016
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Subject: [Bug middle-end/68933] ICE when mixing "-fprofile-arcs -ftest-coverage" and "-fcoarray=lib"
Date: Sun, 03 Apr 2016 23:44:00 -0000
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--- Comment #1 from Zaak <zbeekman at gmail dot com> ---
I have confirmed this is a problem on OS X as well, although perhaps the
diagnostics are slightly different?
$ /usr/local/bin/gfortran -I/usr/local/homebrew/Cellar/mpich/3.2/include
-fcoarray=lib -fprofile-arcs -ftest-coverage coarray_distributed_transpose.F90
-c -v
Using built-in specs.
COLLECT_GCC=/usr/local/bin/gfortran
Target: x86_64-apple-darwin14.5.0
Configured with: ../configure --build=x86_64-apple-darwin14.5.0
--prefix=/usr/local/homebrew/Cellar/gcc/5.3.0
--libdir=/usr/local/homebrew/Cellar/gcc/5.3.0/lib/gcc/5
--enable-languages=c,c++,objc,obj-c++,fortran --program-suffix=-5
--with-gmp=/usr/local/opt/gmp --with-mpfr=/usr/local/opt/mpfr
--with-mpc=/usr/local/opt/libmpc --with-isl=/usr/local/opt/isl
--with-system-zlib --enable-libstdcxx-time=yes --enable-stage1-checking
--enable-checking=release --enable-lto --with-build-config=bootstrap-debug
--disable-werror --with-pkgversion='Homebrew gcc 5.3.0'
--with-bugurl=https://github.com/Homebrew/homebrew/issues --enable-plugin
--disable-nls --enable-multilib
Thread model: posix
gcc version 5.3.0 (Homebrew gcc 5.3.0)
COLLECT_GCC_OPTIONS='-mmacosx-version-min=10.10.5' '-I'
'/usr/local/homebrew/Cellar/mpich/3.2/include' '-fcoarray=lib' '-fprofile-arcs'
'-ftest-coverage' '-c' '-v' '-mtune=core2'
/usr/local/homebrew/Cellar/gcc/5.3.0/libexec/gcc/x86_64-apple-darwin14.5.0/5.3.0/f951
coarray_distributed_transpose.F90
-cpp=/var/folders/4t/my3vyzsx7pg80tc_cxhyfc7h0000gp/T//ccN09K7q.f90 -quiet -v
-I /usr/local/homebrew/Cellar/mpich/3.2/include -D__DYNAMIC__
coarray_distributed_transpose.F90 -fPIC -quiet -dumpbase
coarray_distributed_transpose.F90 -mmacosx-version-min=10.10.5 -mtune=core2
-auxbase coarray_distributed_transpose -version -fcoarray=lib -fprofile-arcs
-ftest-coverage -fintrinsic-modules-path
/usr/local/homebrew/Cellar/gcc/5.3.0/lib/gcc/5/gcc/x86_64-apple-darwin14.5.0/5.3.0/finclude
-o /var/folders/4t/my3vyzsx7pg80tc_cxhyfc7h0000gp/T//ccK2CN3d.s
GNU Fortran (Homebrew gcc 5.3.0) version 5.3.0 (x86_64-apple-darwin14.5.0)
compiled by GNU C version 5.3.0, GMP version 6.1.0, MPFR version
3.1.3-p2, MPC version 1.0.3
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
ignoring nonexistent directory
"/usr/local/homebrew/Cellar/gcc/5.3.0/lib/gcc/5/gcc/x86_64-apple-darwin14.5.0/5.3.0/../../../../../../x86_64-apple-darwin14.5.0/include"
#include "..." search starts here:
#include <...> search starts here:
/usr/local/homebrew/Cellar/mpich/3.2/include
/usr/local/homebrew/Cellar/gcc/5.3.0/lib/gcc/5/gcc/x86_64-apple-darwin14.5.0/5.3.0/finclude
/usr/local/homebrew/Cellar/gcc/5.3.0/lib/gcc/5/gcc/x86_64-apple-darwin14.5.0/5.3.0/include
/usr/local/include
/usr/local/homebrew/Cellar/gcc/5.3.0/include
/usr/local/homebrew/Cellar/gcc/5.3.0/lib/gcc/5/gcc/x86_64-apple-darwin14.5.0/5.3.0/include-fixed
/usr/include
End of search list.
GNU Fortran2008 (Homebrew gcc 5.3.0) version 5.3.0 (x86_64-apple-darwin14.5.0)
compiled by GNU C version 5.3.0, GMP version 6.1.0, MPFR version
3.1.3-p2, MPC version 1.0.3
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
coarray_distributed_transpose.F90:111:0:
use run_size
^
internal compiler error: Segmentation fault: 11
coarray_distributed_transpose.F90:111:0: internal compiler error: Abort trap: 6
gfortran: internal compiler error: Abort trap: 6 (program f951)
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://github.com/Homebrew/homebrew/issues> for instructions.
>From gcc-bugs-return-520997-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 06:22:03 2016
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Subject: [Bug target/67172] [5/6 regression] i686-w64-mingw32 dwarf2 bootstrap fails with undefined reference to __EH_FRAME_BEGIN__
Date: Mon, 04 Apr 2016 06:22:00 -0000
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
CC| |ebotcazou at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |ebotcazou at gcc dot gnu.org
--- Comment #8 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Fixing.
>From gcc-bugs-return-520998-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 07:07:35 2016
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Subject: [Bug c++/70521] [C++14] nonempty constexpr noexcept constructor rejected
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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 #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
This got fixed on the trunk (for 6.1) with r233514 aka PR65985 and
on the 5 branch with r233812.
>From gcc-bugs-return-520999-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 07:36:43 2016
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Subject: [Bug tree-optimization/70509] wrong code with extract from a v64qi
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--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #7)
> - if (sel & (1 << UINTVAL (j)))
> + if (sel & (HOST_WIDE_INT_1U << UINTVAL (j)))
>
> change in simplify-rtx.c is preapproved, but it would be nice to have a
> testcase.
Note I haven't succeeded with creating a testcase for this.
To trigger that one needs a problematic VEC_MERGE inside of VEC_SELECT,
and most of the VEC_SELECTS have VEC_CONCAT as their first operand, the
exception
are e.g. broadcasts, but following doesn't trigger it anyway:
#include <x86intrin.h>
__v64qi
f1 (__m512i a, __m512i b)
{
__v64qi c = (__v64qi) _mm512_mask_blend_epi8 (0x1234ffffffffULL, a, b);
__v64qi d = (__v64qi) { 0 };
return __builtin_shuffle (c, d);
}
So it is likely just a theoretical fix for now.
>From gcc-bugs-return-521000-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 07:44:57 2016
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Subject: [Bug c++/70507] integer overflow builtins not constant expressions
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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| |jason at gcc dot gnu.org
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
For GCC's own instrumentation you should obviously not use these builtins, but
the corresponding internal functions, otherwise you take address of something
that doesn't need to be addressable.
Whether we want to mark the builtins as constexpr is for us to decide,
I bet as they are storing to what the last argument points to, it could be only
usable in C++14 and later constexprs, right?
>From gcc-bugs-return-521001-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 07:46:25 2016
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Yeah, you should wrap the body into a BIND_EXPR in the FE.
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Subject: [Bug c++/70505] [4.9/5/6 Regression] Constexpr failure when template type specified
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Subject: [Bug c++/70505] [4.9/5/6 Regression] Constexpr failure when template type specified
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----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
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CC| |jakub at gcc dot gnu.org,
| |jason at gcc dot gnu.org
Summary|Constexpr failure when |[4.9/5/6 Regression]
|template type specified |Constexpr failure when
| |template type specified
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
This is rejected since r196724.
>From gcc-bugs-return-521004-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 07:59:59 2016
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Subject: [Bug c++/70512] [6 Regression] ICE on valid code on x86_64-linux-gnu: canonical types differ for identical types
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----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
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CC| |jakub at gcc dot gnu.org
Target Milestone|--- |6.0
Summary|ICE on valid code on |[6 Regression] ICE on valid
|x86_64-linux-gnu: canonical |code on x86_64-linux-gnu:
|types differ for identical |canonical types differ for
|types |identical types
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r222419.
struct __attribute__ ((__may_alias__)) S
{
S& operator= (int)
{
return *this;
}
};
works properly.
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Subject: [Bug c/70523] New: Inconsistent casting of floats to unsigned short
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Bug ID: 70523
Summary: Inconsistent casting of floats to unsigned short
Product: gcc
Version: 4.8.4
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Created attachment 38171
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38171&action=edit
Test program
Casting of float expression to unsigned short gives different result when cast
is performed via intermediate variable. Specifically:
#include <stdio.h>
int main()
{
float f = 1.7857142687f;
printf("%.10f\n", f);
unsigned short b = 28;
unsigned short a = (unsigned short)(b * f);
printf("%u\n", a);
float temp = b * f;
a = (unsigned short)temp;
printf("%u\n", a);
return 0;
}
Output:
1.7857142687
49
50
Reproduced only for 32-bit compilation.
On 64-bit compilers both outputs are 50.
Optimization level shall be default.
If optimization level is -O2 or higher both outputs are 50.
Similar to bug 47297, but here value of float expression is well within range
of unsigned short, so behaviour should be defined.
>From gcc-bugs-return-521006-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 08:04:50 2016
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Subject: [Bug c++/70513] [4.9/5/6 Regression] ICE on invalid C++ code on x86_64-linux-gnu: Segmentation fault
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What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-04
CC| |jakub at gcc dot gnu.org
Target Milestone|--- |4.9.4
Summary|ICE on invalid C++ code on |[4.9/5/6 Regression] ICE on
|x86_64-linux-gnu: |invalid C++ code on
|Segmentation fault |x86_64-linux-gnu:
| |Segmentation fault
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
ICEs even in -std=c++98 mode starting with r165935, before that it has been
rejected:
pr70503.C:4:17: error: expected unqualified-id before ‘{’ token
pr70503.C:4:29: error: ‘c’ does not name a type
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Subject: [Bug middle-end/70307] [6 Regression] ICE: in gimplify_expr, at gimplify.c:10915 on valid code
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70307
--- Comment #5 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Mon Apr 4 08:11:46 2016
New Revision: 234706
URL: https://gcc.gnu.org/viewcvs?rev=234706&root=gcc&view=rev
Log:
PR c/70307
* c-fold.c (c_fully_fold_internal): Handle VEC_COND_EXPR.
* gcc.dg/torture/pr70307.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr70307.c
Modified:
trunk/gcc/c/ChangeLog
trunk/gcc/c/c-fold.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug middle-end/70307] [6 Regression] ICE: in gimplify_expr, at gimplify.c:10915 on valid code
Date: Mon, 04 Apr 2016 08:13:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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--- Comment #6 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-521009-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 08:17:25 2016
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Subject: [Bug c/70523] Inconsistent casting of floats to unsigned short
Date: Mon, 04 Apr 2016 08:17:00 -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
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
That is the effect of excess precision on i387, see PR333.
You can either use -msse2 -mfpmath=sse if your CPU is capable of SSE2,
or -fexcess-precision=standard for slower, but guaranteed excess precision
according to target macros, or -ffloat-store for even slower behavior.
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Subject: [Bug c/70523] Inconsistent casting of floats to unsigned short
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Sorry for typo, I meant PR323.
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Subject: [Bug ipa/70348] [6 Regression][openacc] ICE in visit_ref_for_mod_analysis, at ipa-prop.c
Date: Mon, 04 Apr 2016 08:27:00 -0000
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
So, given this is a P1, is anyone working on it?
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Subject: [Bug preprocessor/70518] Conditional compilation of #line directives
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I'd say the problem is on the side of your generator, you should be putting the
#line 4 after #endif or switch to main.c earlier.
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Subject: [Bug c++/70336] [5/6 regression] Incorrect Wconversion warning
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r217279, both for C and C++.
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug hsa/70402] HSA: SBR instruction can be undefined
Date: Mon, 04 Apr 2016 08:47:00 -0000
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Mon Apr 4 08:46:51 2016
New Revision: 234707
URL: https://gcc.gnu.org/viewcvs?rev=234707&root=gcc&view=rev
Log:
Fix PR hsa/70402
PR hsa/70402
* hsa-gen.c (gen_hsa_insns_for_switch_stmt): Guard index
value that is really in range handled by SBR instruction.
* hsa-brig.c (emit_switch_insn): Do not emit unconditional
jump.
* hsa-dump.c (dump_hsa_insn_1): Do not dump default BB.
* hsa.h (hsa_insn_sbr::m_default_bb): Remove field.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/hsa-brig.c
trunk/gcc/hsa-dump.c
trunk/gcc/hsa-gen.c
trunk/gcc/hsa.h
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Subject: [Bug hsa/70402] HSA: SBR instruction can be undefined
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Martin Liška <marxin at gcc dot gnu.org> changed:
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug lto/68881] [6 Regression] UNRESOLVED/FAIL: gcc.dg/lto/attr-weakref-1 -O2 -flto
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--- Comment #17 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Author: hubicka
Date: Mon Apr 4 09:26:29 2016
New Revision: 234708
URL: https://gcc.gnu.org/viewcvs?rev=234708&root=gcc&view=rev
Log:
PR ipa/68881
* cgraph.h (symtab_node::copy_visibility_from): New function.
* symtab.c (symtab_node::copy_visibility_from): New function.
* ipa-visibility.c (optimize_weakref): New function.
(function_and_variable_visibility): Use it.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/cgraph.h
trunk/gcc/ipa-visibility.c
trunk/gcc/symtab.c
>From gcc-bugs-return-521017-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 09:31:04 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/70484] [4.9/5/6 Regression] Wrong optimization with aliasing and access via char
Date: Mon, 04 Apr 2016 09:31:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70484
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Apr 4 09:30:16 2016
New Revision: 234709
URL: https://gcc.gnu.org/viewcvs?rev=234709&root=gcc&view=rev
Log:
2016-04-04 Richard Biener <rguenther@suse.de>
PR rtl-optimization/70484
* rtl.h (canon_output_dependence): Declare.
* alias.c (canon_output_dependence): New function.
* dse.c (record_store): Use canon_output_dependence rather
than canon_true_dependence.
* gcc.dg/torture/pr70484.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr70484.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/alias.c
trunk/gcc/dse.c
trunk/gcc/rtl.h
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-521018-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 09:33:16 2016
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Subject: [Bug fortran/65795] Segfault (invalid write) for ALLOCATE statement involving COARRAYS
Date: Mon, 04 Apr 2016 09:33:00 -0000
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--- Comment #4 from vehre at gcc dot gnu.org ---
Author: vehre
Date: Mon Apr 4 09:32:28 2016
New Revision: 234710
URL: https://gcc.gnu.org/viewcvs?rev=234710&root=gcc&view=rev
Log:
gcc/fortran/ChangeLog:
2016-04-04 Andre Vehreschild <vehre@gcc.gnu.org>
PR fortran/65795
* trans-array.c (gfc_array_allocate): When the array is a coarray,
do not nullyfing its allocatable components in array_allocate, because
the nullify missed the array ref and nullifies the wrong component.
Cosmetics.
gcc/testsuite/ChangeLog:
2016-04-04 Andre Vehreschild <vehre@gcc.gnu.org>
PR fortran/65795
* gfortran.dg/coarray_allocate_6.f08: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/coarray_allocate_6.f08
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/trans-array.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/65795] Segfault (invalid write) for ALLOCATE statement involving COARRAYS
Date: Mon, 04 Apr 2016 09:34:00 -0000
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--- Comment #5 from vehre at gcc dot gnu.org ---
Author: vehre
Date: Mon Apr 4 09:33:54 2016
New Revision: 234711
URL: https://gcc.gnu.org/viewcvs?rev=234711&root=gcc&view=rev
Log:
gcc/fortran/ChangeLog:
2016-04-04 Andre Vehreschild <vehre@gcc.gnu.org>
PR fortran/65795
* trans-array.c (gfc_array_allocate): When the array is a coarray,
do not nullyfing its allocatable components in array_allocate, because
the nullify missed the array ref and nullifies the wrong component.
Cosmetics.
gcc/testsuite/ChangeLog:
2016-04-04 Andre Vehreschild <vehre@gcc.gnu.org>
PR fortran/65795
* gfortran.dg/coarray_allocate_6.f08: New test.
Added:
branches/gcc-5-branch/gcc/testsuite/gfortran.dg/coarray_allocate_6.f08
Modified:
branches/gcc-5-branch/gcc/fortran/ChangeLog
branches/gcc-5-branch/gcc/fortran/trans-array.c
branches/gcc-5-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-521020-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 09:37:36 2016
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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/70484] [4.9/5 Regression] Wrong optimization with aliasing and access via char
Date: Mon, 04 Apr 2016 09:37:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |6.0
Summary|[4.9/5/6 Regression] Wrong |[4.9/5 Regression] Wrong
|optimization with aliasing |optimization with aliasing
|and access via char |and access via char
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed on trunk sofar.
>From gcc-bugs-return-521022-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 09:40:30 2016
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Subject: [Bug fortran/70397] [5/6 Regression] ice while allocating ultimate polymorphic
Date: Mon, 04 Apr 2016 09:40:00 -0000
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vehre at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |FIXED
--- Comment #6 from vehre at gcc dot gnu.org ---
No complaints so far, closing.
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Subject: [Bug fortran/65795] Segfault (invalid write) for ALLOCATE statement involving COARRAYS
Date: Mon, 04 Apr 2016 09:40:00 -0000
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--- Comment #6 from vehre at gcc dot gnu.org ---
Waiting one week for regression reports before closing.
>From gcc-bugs-return-521023-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 09:41:56 2016
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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/70524] New: [5/6 Regression] ICE when using -frepack-arrays -Warray-temporaries
Date: Mon, 04 Apr 2016 09:41:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70524
Bug ID: 70524
Summary: [5/6 Regression] ICE when using -frepack-arrays
-Warray-temporaries
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: dominiq at lps dot ens.fr
CC: manu at gcc dot gnu.org, vehre at gcc dot gnu.org
Target Milestone: ---
While investigating pr69659, I noticed that compiling the tests
gfortran.dg/dependency_3[56].f90
gfortran.dg/inline_(sum|transpose)_1.f90
with -frepack-arrays -Warray-temporaries gives an ICE
in gfc_format_decoder, at fortran/error.c:937
While bisecting I have found that the ICE was non-deterministic.
The change occurred between revisions r218255 (2014-12-02, warnings) and
r218414 (2014-12-05, non-deterministic ICE).
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Subject: [Bug fortran/70524] [5/6 Regression] ICE when using -frepack-arrays -Warray-temporaries
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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| |2016-04-04
Known to work| |4.9.3
Ever confirmed|0 |1
Known to fail| |5.3.0, 6.0
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Subject: [Bug fortran/66911] ICE on allocate character with source as a derived type component
Date: Mon, 04 Apr 2016 09:48:00 -0000
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--- Comment #8 from vehre at gcc dot gnu.org ---
Author: vehre
Date: Mon Apr 4 09:47:47 2016
New Revision: 234712
URL: https://gcc.gnu.org/viewcvs?rev=234712&root=gcc&view=rev
Log:
gcc/fortran/ChangeLog:
2016-04-04 Andre Vehreschild <vehre@gmx.de>
PR fortran/66911
* trans-stmt.c (gfc_trans_allocate): Get the deferred length of an
expression by converting the expression when the length is not set
in the symbol's ts.
gcc/testsuite/ChangeLog:
2016-04-04 Andre Vehreschild <vehre@gmx.de>
PR fortran/66911
* gfortran.dg/deferred_character_16.f90: New test.
Added:
branches/gcc-5-branch/gcc/testsuite/gfortran.dg/deferred_character_16.f90
Modified:
branches/gcc-5-branch/gcc/fortran/ChangeLog
branches/gcc-5-branch/gcc/fortran/trans-stmt.c
branches/gcc-5-branch/gcc/testsuite/ChangeLog
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Subject: [Bug c++/70336] [5/6 regression] Incorrect Wconversion warning
Date: Mon, 04 Apr 2016 10:05:00 -0000
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 38172
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38172&action=edit
gcc6-pr70336.patch
IMNSHO -Wconversion is totally useless warning, and one where if you want to
avoid "false positives", we'd need to implement full VRP in the FEs.
Anyway, given say:
void
f1 (unsigned char * x, int y, int z)
{
x[z / 8] |= (unsigned char) (0x80 >> y);
}
unsigned char
f2 (unsigned char x, int y)
{
x = x | (unsigned char) (0x80 >> y);
return x;
}
unsigned char
f3 (unsigned char x, int y)
{
x = x | (unsigned char) (y & 255);
return x;
}
unsigned char
f4 (unsigned char x, int y)
{
x = x | (unsigned char) (y & 127);
return x;
}
unsigned char
f5 (unsigned char x, unsigned char y)
{
x = x | (unsigned char) (y & 255);
return x;
}
the attached patch disables the warning on f4, and on f5 we don't warn already
before. Perhaps the match.pd change should be guarded with GIMPLE? The
match.pd change is responsible for getting rid of the explicit unsigned char
casts early. Though, if you in the above testcase remove all the explicit
(unsigned char) casts, already gcc 4.9 and earlier warn.
As for the 0x80 >> whatever case, we'd need to handle that in
unsafe_conversion_p as another case (though, the question is if at least on
some targets with negative or other out of bound shift counts we don't
sometimes get (in UB code) values where conversion would alter the values).
And the y & 255 case is also questionable, there it wants to warn that for
negative y the value would change and unsafe_conversion_p for whatever reason
handles unsigned vs. signed mask constant differently for that exact case.
>From gcc-bugs-return-521027-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 10:18:42 2016
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Subject: [Bug ipa/70348] [6 Regression][openacc] ICE in visit_ref_for_mod_analysis, at ipa-prop.c
Date: Mon, 04 Apr 2016 10:18:00 -0000
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Thomas Schwinge <tschwinge at gcc dot gnu.org> changed:
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--- Comment #7 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
(In reply to Nathan Sidwell from comment #5)
> the intended current implementation is to treat 'sum' as firstprivate.
Not actively looking into that one at the moment, but:
> however, putting in an explicit firstprivate causes another different ICE
> (in lower_oacc_reductions) -- regardless of whether 'sum' is a parameter,
> or a local (initialized) variable. Clearly at least two other bugs lurk.
I highly suspect (will test) that ICE to be fixed by patch that I'm currently
preparing for trunk (already fixed on gomp-4_0-branch).
(In reply to Jakub Jelinek from comment #6)
> So, given this is a P1, is anyone working on it?
So, assigning to me for the moment; will then re-evaluate the status after the
ICE's fixed.
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Subject: [Bug fortran/66911] ICE on allocate character with source as a derived type component
Date: Mon, 04 Apr 2016 10:19:00 -0000
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--- Comment #9 from vehre at gcc dot gnu.org ---
Waiting one week for regressions before closing.
>From gcc-bugs-return-521029-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 10:24:14 2016
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Subject: [Bug fortran/70524] [5/6 Regression] ICE when using -frepack-arrays -Warray-temporaries
Date: Mon, 04 Apr 2016 10:24:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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>From gcc-bugs-return-521030-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 10:25:18 2016
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Subject: [Bug bootstrap/70519] genmatch fails to compile under gcc-5.2.0 - missing '-lstdc++' .
Date: Mon, 04 Apr 2016 10:25:00 -0000
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
xg++ from stage1 should already add -lstdc++. Sth else weird is going on for
you.
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Subject: [Bug c++/70513] [4.9/5/6 Regression] ICE on invalid C++ code on x86_64-linux-gnu: Segmentation fault
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Subject: [Bug testsuite/70516] [4.9/5/6 Regression] Regtesting acats hangs on x86_64-apple-darwin15.4
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Subject: [Bug c++/70512] [6 Regression] ICE on valid code on x86_64-linux-gnu: canonical types differ for identical types
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Subject: [Bug c++/70505] [4.9/5/6 Regression] Constexpr failure when template type specified
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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Subject: [Bug c++/70336] [5/6 regression] Incorrect Wconversion warning
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--- Comment #5 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #4)
> Created attachment 38172 [details]
> gcc6-pr70336.patch
>
> IMNSHO -Wconversion is totally useless warning, and one where if you want to
> avoid "false positives", we'd need to implement full VRP in the FEs.
What does VRP has to do with this case? This is just that the GCC FEs still
suck by doing early folding after Clang showed almost a decade ago that early
folding is evil and useless.
Also current -Wconversion sucks mostly because of PR40752, which has a patch
that was rejected on purist but IMHO completely non-practical reasons. Also
because, despite doing useless early folding, the current folding is not
powerful enough to analyse relatively simple expressions such as
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=38522#c3.
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Subject: [Bug libstdc++/70503] [4.9/5/6 Regression] extern "C" functions in src/c++11/thread.cc are global in libstdc++.a
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>From gcc-bugs-return-521038-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 10:32:12 2016
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Subject: [Bug c/70378] wrong warning with -Wconversion with explicit cast
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--- Comment #3 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
(In reply to Manuel López-Ibáñez from comment #2)
> Simpler testcase:
>
> typedef unsigned int uint32_t;
> void foo(char a, uint32_t b)
> {
> b = (uint32_t)((b * 10) + (uint32_t)a);
> }
>
> Something must be removing the explicit cast or messing up the expression.
Perhaps a duplicate of PR70336. It seems that the move to match.pd just added
more early folding that removes explicit casts.
>From gcc-bugs-return-521037-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 10:32:12 2016
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Subject: [Bug c++/70501] [6 Regression] internal compiler error: in verify_ctor_sanity, at cp/constexpr.c:2249
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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Subject: [Bug tree-optimization/70499] internal compiler error: in make_ssa_name_fn, at tree-ssanames.c:266
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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> ---
Confirmed.
264 gcc_assert (TREE_CODE (var) == VAR_DECL
265 || TREE_CODE (var) == PARM_DECL
266 || TREE_CODE (var) == RESULT_DECL
267 || (TYPE_P (var) && is_gimple_reg_type (var)));
268
(gdb) p var
$1 = <record_type 0x7ffff5137738 SIMD>
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Subject: [Bug fortran/67538] ICE with invalid source allocation
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--- Comment #5 from vehre at gcc dot gnu.org ---
Author: vehre
Date: Mon Apr 4 10:32:32 2016
New Revision: 234714
URL: https://gcc.gnu.org/viewcvs?rev=234714&root=gcc&view=rev
Log:
gcc/fortran/ChangeLog:
2016-04-04 Andre Vehreschild <vehre@gcc.gnu.org>
PR fortran/67538
* resolve.c (resolve_allocate_expr): Emit error message when no
array spec and no array valued source= expression is given in an
F2008 allocate() for an array to allocate.
gcc/testsuite/ChangeLog:
2016-04-04 Andre Vehreschild <vehre@gcc.gnu.org>
PR fortran/67538
* gfortran.dg/allocate_with_source_19.f08: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/allocate_with_source_19.f08
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/resolve.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/67538] ICE with invalid source allocation
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--- Comment #6 from vehre at gcc dot gnu.org ---
Waiting one week for regressions before closing.
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Subject: [Bug fortran/70524] [5/6 Regression] ICE when using -frepack-arrays -Warray-temporaries
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70524
--- Comment #1 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
What is the gfc_warning* call that produces the ICE? Backtrace?
It seems gfortran is generating a NULL loc or loc->lb, or it is keeping an
invalid value of loc->nextc or loc->lb->line. This might be due to passing the
wrong thing to the call or not setting up gfc_current_locus correctly. This for
sure pre-dates the move to the new diagnostics: now we assert when checking
whereas before the wrong loc was simply treated as unknown loc (building with
--disable-checking should do just that and not ICE).
>From gcc-bugs-return-521043-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 10:49:21 2016
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Subject: [Bug c++/70336] [5/6 regression] Incorrect Wconversion warning
Date: Mon, 04 Apr 2016 10:49:00 -0000
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 38173
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38173&action=edit
gcc6-pr70336.patch
Patch to revert (for GENERIC only) the match.pd change that causes this
regression.
>From gcc-bugs-return-521044-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 10:50:16 2016
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Subject: [Bug target/70525] New: generating 'vpandn' without the mode suffix, gnu as fails to assemble (-mavx512bw)
Date: Mon, 04 Apr 2016 10:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70525
Bug ID: 70525
Summary: generating 'vpandn' without the mode suffix, gnu as
fails to assemble (-mavx512bw)
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Keywords: assemble-failure
Severity: normal
Priority: P3
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Reporter: zsojka at seznam dot cz
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Target: x86_64-pc-linux-gnu
Created attachment 38174
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38174&action=edit
reduced testcase
Output:
$ gcc -O -mavx512bw testcase.c
/tmp/ccuJjUxJ.s: Assembler messages:
/tmp/ccuJjUxJ.s:8: Error: operand type mismatch for `vpandn'
@@ -5,7 +5,7 @@
foo:
.LFB0:
.cfi_startproc
- vpandn %zmm0, %zmm1, %zmm0
+ vpandnq %zmm0, %zmm1, %zmm0
ret
.cfi_endproc
.LFE0:
Fixes the assembly (similar fix applies for the intel syntax). (vpandnd can be
used as well)
Both the "vpandnq" and "vpandnd" instructions should be available in the
"foundation" instruction set with -mavx512f, but -mavx512bw is needed to force
generation of the instruction. I will create a missed-optimization for this,
unless I am wrong.
>From gcc-bugs-return-521045-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 10:52:13 2016
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Subject: [Bug c++/70336] [5/6 regression] Incorrect Wconversion warning
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--- Comment #7 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #6)
> Created attachment 38173 [details]
> gcc6-pr70336.patch
>
> Patch to revert (for GENERIC only) the match.pd change that causes this
> regression.
Does it fix also PR70378?
>From gcc-bugs-return-521046-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 10:56:21 2016
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Subject: [Bug c++/70336] [5/6 regression] Incorrect Wconversion warning
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--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The above patch (untested so far) should get rid of the regression, thus we'd
warn exactly where 4.9 warned.
But, consider say:
void
f1 (unsigned char * x, int y, int z)
{
x[z / 8] |= (unsigned char) (0x80 >> y);
}
unsigned char
f2 (unsigned char x, int y)
{
x = x | (unsigned char) (0x80 >> y);
return x;
}
unsigned char
f3 (unsigned char x, int y)
{
x = x | (unsigned char) (y & 255);
return x;
}
unsigned char
f4 (unsigned char x, int y)
{
x = x | (unsigned char) (y & 127);
return x;
}
unsigned char
f5 (unsigned char x, unsigned char y)
{
x = x | (unsigned char) (y & 255);
return x;
}
unsigned char
f6 (unsigned char x, int y)
{
x = (unsigned char) (y & 255);
return x;
}
void
f7 (unsigned char * x, int y, int z)
{
x[z / 8] |= (0x80 >> y);
}
unsigned char
f8 (unsigned char x, int y)
{
x = x | (0x80 >> y);
return x;
}
unsigned char
f9 (unsigned char x, int y)
{
x = x | (y & 255);
return x;
}
unsigned char
f10 (unsigned char x, int y)
{
x = x | (y & 127);
return x;
}
unsigned char
f11 (unsigned char x, unsigned char y)
{
x = x | (y & 255);
return x;
}
unsigned char
f12 (unsigned char x, int y)
{
x = (y & 255);
return x;
}
Here -Wconversion will warn for many casesm even in 4.9, eventhough one could
argue that say in the f4 case nothing is lost during conversion, or that
without the explicit casts we should have known that nothing is altered during
the implicit conversions. Which is why I've been talking about VRP, when we
start adding further and further cases where the implicit conversions can't
alter the values, we'll reimplement big part of VRP in the FEs. And this has
nothing to do with not really delayed folding (even when both C and C++ FEs now
actually delay folding to some extents), to avoid the "false positives" from
-Wconversion you then want more folding rather than less folding.
>From gcc-bugs-return-521047-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 10:57:59 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70525] generating 'vpandn' without the mode suffix, gnu as fails to assemble (-mavx512bw)
Date: Mon, 04 Apr 2016 10:57:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-04
CC| |jakub at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I'll have a look.
>From gcc-bugs-return-521048-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 10:58:35 2016
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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/70524] [5/6 Regression] ICE when using -frepack-arrays -Warray-temporaries
Date: Mon, 04 Apr 2016 10:58:00 -0000
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--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> What is the gfc_warning* call that produces the ICE? Backtrace?
For gfortran.dg/dependency_35.f90, the backtrace is
/opt/gcc/_clean/gcc/testsuite/gfortran.dg/dependency_35.f90:6:0:
pure function bar(i,j)
in gfc_format_decoder, at fortran/error.c:937
...
frame #9: 0x0000000100ca2116 f951`fancy_abort(file=<unavailable>,
line=<unavailable>, function=<unavailable>) + 38 at diagnostic.c:1329
frame #10: 0x00000001000313c4 f951`::gfc_format_decoder(pp=<unavailable>,
text=<unavailable>, spec=<unavailable>, precision=<unavailable>,
wide=<unavailable>, plus=<unavailable>, hash=false) + 244 at error.c:937
frame #11: 0x0000000100ca7012 f951`pp_format(pp=0x00000001424015e0,
text=0x00007fff5fbfeb40) + 2274 at pretty-print.c:633
frame #12: 0x0000000100ca2831
f951`diagnostic_report_diagnostic(context=0x00000001416248c0,
diagnostic=0x00007fff5fbfeb40) + 401 at diagnostic.c:825
frame #13: 0x00000001000310b9 f951`::gfc_warning(opt=174, gmsgid="Creating
array temporary at %L", ap=<unavailable>) + 217 at error.c:794
frame #14: 0x0000000100031dd7 f951`gfc_warning(opt=<unavailable>,
gmsgid=<unavailable>) + 135 at error.c:825
frame #15: 0x00000001000e185b
f951`gfc_trans_dummy_array_bias(sym=0x0000000142704d00,
tmpdesc=0x000000014215ba20, block=0x00007fff5fbff070) + 2571 at
trans-array.c:6167
frame #16: 0x00000001000f7a7e
f951`gfc_trans_deferred_vars(proc_sym=0x0000000142704d00,
block=0x00007fff5fbff070) + 910 at trans-decl.c:4037
frame #17: 0x00000001000fa714
f951`gfc_generate_function_code(ns=<unavailable>) + 1332 at trans-decl.c:6258
frame #18: 0x00000001000d8322
f951`gfc_generate_module_code(ns=0x0000000144013400) + 370 at trans.c:2058
frame #19: 0x000000010008bbaf f951`gfc_parse_file() + 160 at parse.c:5600
frame #20: 0x000000010008bb0f f951`gfc_parse_file() + 1247
frame #21: 0x00000001000d1979 f951`::gfc_be_parse_file() + 57 at
f95-lang.c:201
frame #22: 0x000000010099fa8c f951`::compile_file() + 60 at toplev.c:465
frame #23: 0x0000000100d879df f951`toplev::main(int, char**) + 1154 at
toplev.c:1988
frame #24: 0x0000000100d8755d f951`toplev::main(this=<unavailable>,
argc=<unavailable>, argv=<unavailable>) + 733
frame #25: 0x0000000100d893b9 f951`main(argc=4, argv=0x00007fff5fbff300) +
41 at main.c:39
>From gcc-bugs-return-521049-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 11:08:16 2016
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Subject: [Bug c++/70336] [5/6 regression] Incorrect Wconversion warning
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--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Manuel López-Ibáñez from comment #7)
> (In reply to Jakub Jelinek from comment #6)
> > Created attachment 38173 [details]
> > gcc6-pr70336.patch
> >
> > Patch to revert (for GENERIC only) the match.pd change that causes this
> > regression.
>
> Does it fix also PR70378?
Of course it doesn't, how could it?
PR70378 is not a (recent) regression, I can reproduce it all the way back to
r130377.
>From gcc-bugs-return-521050-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 11:18:38 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/64387] ICE: in extract_insn, at recog.c:2327 (unrecognizable insn) with -ffloat-store -mavx512er
Date: Mon, 04 Apr 2016 11:18:00 -0000
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Kirill Yukhin <kyukhin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |kyukhin at gcc dot gnu.org
Resolution|--- |FIXED
--- Comment #6 from Kirill Yukhin <kyukhin at gcc dot gnu.org> ---
Done
>From gcc-bugs-return-521051-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 11:19:53 2016
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From: "clyon at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/62254] [4.9/5/6 Regression] gcc-4.9 ICEs on linux kernel zlib for armv3
Date: Mon, 04 Apr 2016 11:19:00 -0000
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Christophe Lyon <clyon at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Resolution|FIXED |---
--- Comment #18 from Christophe Lyon <clyon at gcc dot gnu.org> ---
I think you forgot to re-open this bug.
>From gcc-bugs-return-521052-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 11:21:39 2016
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From: "vehre at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/70524] [5/6 Regression] ICE when using -frepack-arrays -Warray-temporaries
Date: Mon, 04 Apr 2016 11:21:00 -0000
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--- Comment #3 from vehre at gcc dot gnu.org ---
Oh no, not again gfc_trans_dummy_array_bias...
>From gcc-bugs-return-521053-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 11:44:16 2016
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From: "jandemooij+gccbugs at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/70526] New: GCC 6 miscompiles Firefox JIT compiler
Date: Mon, 04 Apr 2016 11:44:00 -0000
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Bug ID: 70526
Summary: GCC 6 miscompiles Firefox JIT compiler
Product: gcc
Version: 6.0
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Created attachment 38175
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38175&action=edit
Reduced testcase
See https://bugzilla.mozilla.org/show_bug.cgi?id=1245783
I managed to reduce it to the attached test case.
$ g++ --version
g++-6 (Ubuntu 6-20160319-0ubuntu11) 6.0.0 20160319 (experimental) [trunk
revision 234350]
$ g++-6 -O3 -Wall -o test test.cpp
$ ./test
Fail
It does not print "Fail" with -O0 or with g++ 5.3.1
The problem seems to be on this line:
return TypedOrValueRegister(type, ToAnyRegister(value));
It looks like we read a bogus/uninitialized value from the stack and use that
instead of the result of the ToAnyRegister call.
>From gcc-bugs-return-521054-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 11:51:01 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/70527] New: Missed fold for "(long int) x * 12 - (long int)(x + 1) * 12"
Date: Mon, 04 Apr 2016 11:51:00 -0000
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Bug ID: 70527
Summary: Missed fold for "(long int) x * 12 - (long int)(x + 1)
* 12"
Product: gcc
Version: 6.0
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Given below test:
long unsigned int foo (int x)
{
return (long unsigned int) x * 12 - (long unsigned int)(x + 1) * 12;
}
long int bar (int x)
{
return (long int) x * 12 - (long int)(x + 1) * 12;
}
The 004t.gimple dump is like:
foo (int x)
{
long unsigned int D.1762;
D.1762 = 18446744073709551604;
return D.1762;
}
bar (int x)
{
long int D.1764;
long int D.1765;
long int D.1766;
int D.1767;
long int D.1768;
long int D.1769;
D.1765 = (long int) x;
D.1766 = D.1765 * 12;
D.1767 = x + 1;
D.1768 = (long int) D.1767;
D.1769 = D.1768 * -12;
D.1764 = D.1766 + D.1769;
return D.1764;
}
Seems "(long int) x * 12 - (long int)(x + 1) * 12" is missed in
generic-simplify.
>From gcc-bugs-return-521055-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 11:54:30 2016
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From: "trippels at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70528] New: [5/6 Regression] bogus error: constructor required before non-static data member
Date: Mon, 04 Apr 2016 11:54:00 -0000
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Bug ID: 70528
Summary: [5/6 Regression] bogus error: constructor required
before non-static data member
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Since r225189 LLVM trunk (since commit be4ea76eaa0 ) doesn't build anymore:
In file included from
/usr/lib/gcc/x86_64-pc-linux-gnu/6.0.0/include/g++-v6/bits/move.h:57:0,
from
/usr/lib/gcc/x86_64-pc-linux-gnu/6.0.0/include/g++-v6/bits/stl_pair.h:59,
from
/usr/lib/gcc/x86_64-pc-linux-gnu/6.0.0/include/g++-v6/utility:70,
from
/usr/lib/gcc/x86_64-pc-linux-gnu/6.0.0/include/g++-v6/algorithm:60,
from /home/markus/llvm/include/llvm/ADT/StringRef.h:14,
from /home/markus/llvm/include/llvm/ADT/StringMap.h:17,
from /home/markus/llvm/include/llvm/Support/Host.h:17,
from /home/markus/llvm/include/llvm/ADT/Hashing.h:49,
from /home/markus/llvm/include/llvm/ADT/ArrayRef.h:13,
from /home/markus/llvm/include/llvm/ADT/DenseMapInfo.h:17,
from /home/markus/llvm/include/llvm/ADT/DenseMap.h:17,
from
/home/markus/llvm/lib/Bitcode/Writer/ValueEnumerator.h:17,
from
/home/markus/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp:14:
/usr/lib/gcc/x86_64-pc-linux-gnu/6.0.0/include/g++-v6/type_traits: In
substitution of ‘template<class _Tp, class> static std::true_type
std::__do_is_default_constructible_impl::__test(int) [with _Tp =
llvm::ValueEnumerator::MDRange; <template-parameter-1-2> = <missing>]’:
/usr/lib/gcc/x86_64-pc-linux-gnu/6.0.0/include/g++-v6/type_traits:879:35:
required from ‘struct
std::__is_default_constructible_impl<llvm::ValueEnumerator::MDRange>’
/usr/lib/gcc/x86_64-pc-linux-gnu/6.0.0/include/g++-v6/type_traits:143:12:
required from ‘struct
std::__and_<std::__not_<std::is_void<llvm::ValueEnumerator::MDRange> >,
std::__is_default_constructible_impl<llvm::ValueEnumerator::MDRange> >’
/usr/lib/gcc/x86_64-pc-linux-gnu/6.0.0/include/g++-v6/type_traits:883:12:
required from ‘struct
std::__is_default_constructible_atom<llvm::ValueEnumerator::MDRange>’
/usr/lib/gcc/x86_64-pc-linux-gnu/6.0.0/include/g++-v6/type_traits:904:12:
required from ‘struct
std::__is_default_constructible_safe<llvm::ValueEnumerator::MDRange, false>’
/usr/lib/gcc/x86_64-pc-linux-gnu/6.0.0/include/g++-v6/type_traits:910:12:
required from ‘struct
std::is_default_constructible<llvm::ValueEnumerator::MDRange>’
/usr/lib/gcc/x86_64-pc-linux-gnu/6.0.0/include/g++-v6/type_traits:143:12: [
skipping 6 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable
]
/usr/lib/gcc/x86_64-pc-linux-gnu/6.0.0/include/g++-v6/type_traits:715:12:
required from ‘struct
std::is_abstract<llvm::detail::AlignerImpl<llvm::detail::DenseMapPair<unsigned
int, llvm::ValueEnumerator::MDRange> [1], llvm::SmallDenseMap<unsigned int,
llvm::ValueEnumerator::MDRange, 1u>::LargeRep, char, char, char, char, char,
char, char, char> >’
/home/markus/llvm/include/llvm/Support/AlignOf.h:79:13: required from
‘constexpr const unsigned int
llvm::AlignOf<llvm::detail::AlignerImpl<llvm::detail::DenseMapPair<unsigned
int, llvm::ValueEnumerator::MDRange> [1], llvm::SmallDenseMap<unsigned int,
llvm::ValueEnumerator::MDRange, 1u>::LargeRep, char, char, char, char, char,
char, char, char> >::Alignment’
/home/markus/llvm/include/llvm/Support/AlignOf.h:86:52: required from ‘struct
llvm::AlignOf<llvm::detail::AlignerImpl<llvm::detail::DenseMapPair<unsigned
int, llvm::ValueEnumerator::MDRange> [1], llvm::SmallDenseMap<unsigned int,
llvm::ValueEnumerator::MDRange, 1u>::LargeRep, char, char, char, char, char,
char, char, char> >’
/home/markus/llvm/include/llvm/Support/AlignOf.h:251:8: required from ‘struct
llvm::AlignedCharArrayUnion<llvm::detail::DenseMapPair<unsigned int,
llvm::ValueEnumerator::MDRange> [1], llvm::SmallDenseMap<unsigned int,
llvm::ValueEnumerator::MDRange, 1u>::LargeRep, char, char, char, char, char,
char, char, char>’
/home/markus/llvm/include/llvm/ADT/DenseMap.h:759:59: required from ‘class
llvm::SmallDenseMap<unsigned int, llvm::ValueEnumerator::MDRange, 1u>’
/home/markus/llvm/lib/Bitcode/Writer/ValueEnumerator.h:100:39: required from
here
/usr/lib/gcc/x86_64-pc-linux-gnu/6.0.0/include/g++-v6/type_traits:868:48:
error: constructor required before non-static data member for
‘llvm::ValueEnumerator::MDRange::First’ has been parsed
template<typename _Tp, typename = decltype(_Tp())>
^~~~~
/usr/lib/gcc/x86_64-pc-linux-gnu/6.0.0/include/g++-v6/type_traits:868:48:
error: constructor required before non-static data member for
‘llvm::ValueEnumerator::MDRange::Last’ has been parsed
/usr/lib/gcc/x86_64-pc-linux-gnu/6.0.0/include/g++-v6/type_traits:868:48:
error: constructor required before non-static data member for
‘llvm::ValueEnumerator::MDRange::NumStrings’ has been parsed
markus@x4 llvm_build % cat BitcodeWriter.ii
template <typename _Tp> struct integral_constant {
static constexpr _Tp value = 0;
};
template <bool, typename> struct conditional;
template <typename...> struct A;
template <typename _B1, typename _B2>
struct A<_B1, _B2> : conditional<_B1::value, _B2>::type {};
struct B : integral_constant<bool> {};
struct C {
template <typename _Tp, typename = decltype(_Tp())>
static integral_constant<bool> __test(int);
};
template <typename _Tp> struct L : C { typedef decltype(__test<_Tp>(0)) type;
};
template <typename _Tp> struct M : A<B, L<_Tp>> {};
template <typename _Tp> struct N : M<_Tp>::type {};
struct D {
static integral_constant<bool> __test();
};
template <typename> struct __is_implicitly_default_constructible_impl : D {
typedef decltype(__test()) type;
};
template <typename>
struct F : __is_implicitly_default_constructible_impl<int>::type {};
template <typename _Tp> struct O : A<N<_Tp>, F<_Tp>> {};
template <bool> struct G;
template <bool, typename _Iftrue> struct conditional { typedef _Iftrue type; };
template <typename _T2> struct H {
template <typename _U1 = int, typename _U2 = _T2,
typename G<A<O<_U1>, O<_U2>>::value>::type = true>
H();
};
template <typename ValueT, typename BucketT = H<ValueT>> struct I {
BucketT storage;
};
struct J {
struct K {
int First = 0;
};
I<K> FunctionMDInfo;
};
markus@x4 llvm_build % clang++ -std=c++11 -c BitcodeWriter.ii
markus@x4 llvm_build % icpc -wd3802 -std=c++11 -c BitcodeWriter.ii
markus@x4 llvm_build % g++ -std=c++11 -c BitcodeWriter.ii
BitcodeWriter.ii: In substitution of ‘template<class _Tp, class> static
integral_constant<bool> C::__test(int) [with _Tp = J::K;
<template-parameter-1-2> = <missing>]’:
BitcodeWriter.ii:13:68: required from ‘struct L<J::K>’
BitcodeWriter.ii:7:8: required from ‘struct A<B, L<J::K> >’
BitcodeWriter.ii:14:32: required from ‘struct M<J::K>’
BitcodeWriter.ii:15:32: required from ‘struct N<J::K>’
BitcodeWriter.ii:7:8: required from ‘struct A<N<J::K>, F<J::K> >’
BitcodeWriter.ii:24:32: required from ‘struct O<J::K>’
BitcodeWriter.ii:7:8: required from ‘struct A<O<int>, O<J::K> >’
BitcodeWriter.ii:29:58: required by substitution of ‘template<class _U1,
class _U2, typename G<A<O<_U1>, O<_U2> >::value>::type <anonymous> >
H<_T2>::H() [with _U1 = int; _U2 = J::K; typename G<A<O<_U1>, O<_U2>
>::value>::type <anonymous> = <missing>]’
BitcodeWriter.ii:32:65: required from ‘struct I<J::K>’
BitcodeWriter.ii:39:8: required from here
BitcodeWriter.ii:10:47: error: constructor required before non-static data
member for ‘J::K::First’ has been parsed
template <typename _Tp, typename = decltype(_Tp())>
^~~~~
>From gcc-bugs-return-521056-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 11:58:07 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/70499] internal compiler error: in make_ssa_name_fn, at tree-ssanames.c:266
Date: Mon, 04 Apr 2016 11:58:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
einline produces the broken SSA name initially (in some way). Created by
#2 0x0000000000da59f9 in gimple_regimplify_operands (stmt=
<gimple_call 0x7ffff515bab0>, gsi_p=0x7fffffff8c50)
at /space/rguenther/src/svn/trunk/gcc/gimplify-me.c:303
303 temp = make_ssa_name (temp);
(gdb) l
298 }
299 if (need_temp)
300 {
301 tree temp = create_tmp_reg (TREE_TYPE (lhs));
302 if (gimple_in_ssa_p (cfun))
303 temp = make_ssa_name (temp);
304 gimple_set_lhs (stmt, temp);
305 post_stmt = gimple_build_assign (lhs, temp);
(gdb) p debug_gimple_stmt (stmt)
# .MEM = VDEF <.MEM>
MEM[(struct SIMD *)_1] = SIMD::operator* (&hx, hy);
the code is really weird.
if (is_gimple_reg_type (TREE_TYPE (lhs)))
need_temp = true;
else if (TYPE_MODE (TREE_TYPE (lhs)) != BLKmode)
{
if (is_gimple_call (stmt))
{
tree fndecl = gimple_call_fndecl (stmt);
if (!aggregate_value_p (TREE_TYPE (lhs), fndecl)
&& !(fndecl && DECL_RESULT (fndecl)
&& DECL_BY_REFERENCE (DECL_RESULT (fndecl))))
need_temp = true;
}
else
need_temp = true;
}
the is_gimple_reg_type case should be the only thing necessary. But the
whole function is a totally weird beast. I'm not going to touch that
but try papering over this mess in some way (probably how this shit
evolved...).
So instead of the above we'll get re-gimplified
D.27340 = SIMD::operator* (&hx, hy);
MEM[(struct SIMD *)_1] = D.27340;
Index: gcc/gimplify-me.c
===================================================================
--- gcc/gimplify-me.c (revision 234705)
+++ gcc/gimplify-me.c (working copy)
@@ -299,7 +299,8 @@ gimple_regimplify_operands (gimple *stmt
if (need_temp)
{
tree temp = create_tmp_reg (TREE_TYPE (lhs));
- if (gimple_in_ssa_p (cfun))
+ if (gimple_in_ssa_p (cfun)
+ && is_gimple_reg_type (TREE_TYPE (lhs)))
temp = make_ssa_name (temp);
gimple_set_lhs (stmt, temp);
post_stmt = gimple_build_assign (lhs, temp);
>From gcc-bugs-return-521057-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 12:08:46 2016
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From: "gcc@axel-naumann.de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70529] New: Unhelpful diagnostic for hex float literals, inconsistent parsing
Date: Mon, 04 Apr 2016 12:08:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70529
Bug ID: 70529
Summary: Unhelpful diagnostic for hex float literals,
inconsistent parsing
Product: gcc
Version: 6.0
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auto d = 0x123p-2;
with g++ prog.cc -Wall -Wextra -std=c++14 -fsyntax-only
produces
prog.cc:1:10: error: exponent has no digits
auto d = 0x123p-2;
^~~~~~
That's a gross misrepresentation of the source code ;-) IIUC
https://github.com/gcc-mirror/gcc/commit/14c36b1402b82304739e865a27cb1aed0d87ec73
removed hex float literal support for c++ std <= 14, making this code
ill-formed.
OTOH this behavior is inconsistent, in that hex float literals with positive
exponents remain valid, even for above invocation.
A more helpful diagnostic (similar to "use of C++1z hexadecimal floating
constant") would be really good to have for people upgrading to GCC 6 without
also upgrading to c++1z. At least for those people with hex floats with
negative exponents :-)
Thanks for considering!
Axel.
>From gcc-bugs-return-521058-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 12:10:36 2016
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From: "safinaskar at mail dot ru" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/70530] New: You should probably add addressof (a) != addressof (b) check to std::swap
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Bug ID: 70530
Summary: You should probably add addressof (a) != addressof (b)
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C++ standard says standard library functions may assume rvalue reference
arguments are unique, i. e. are not aliased to any other arguments (final draft
C++14 N3690 17.6.4.9). I think this implies that move assignment for standard
classes assume there will be no move assignment to itself. Also, I think this
is good idea for other classes to assume the same.
As well as I know there is no any mention in the standard that std::swap
argument should not point to the same object. So, code "swap (a, a)" is legit.
Moreover, this code can appear in real programs. For example, this is code from
http://en.cppreference.com/w/cpp/algorithm/iter_swap (as on 2016-04-02):
// libstdc++'s general std::iter_swap just calls std::swap in c++11 mode
template<class ForwardIt>
void selection_sort(ForwardIt begin, ForwardIt end)
{
for (ForwardIt i = begin; i != end; ++i)
std::iter_swap(i, std::min_element(i, end));
}
Current libstdc++ implementation of std::swap calls move constructor (ctor) one
time and move assignment (op=) two times. If we call std::swap (a, a), then
there will be move op= to itself.
So, I think std::move should check whatever its arguments point to the same
object.
It seems all standard classes will work correctly currently if we call
std::swap (a, a) in stdlibc++. I. e. I cannot think about some concrete
libstdc++ class where std::swap (a, a) will cause any damage. But still
assuming rvalue reference is unique is good idea for other libraries, too. And
this is possible that some library author will assume this and std::swap (a, a)
will fail.
So, what to do? My proposed solution is to fix std::swap. But there are other
variants, of course. For example, remove rvalue ref uniqueness assumption from
the standard. Or add requirement for code which calls std::swap. Even if you
decide to fix std::swap, I think it still be good idea to modify the standard.
For example, to stay explicitly that a = std::move (a) is not allowed for
standard classes, that this is recommended for other class to assume there will
be no code "a = std::move (a)", that swap (a, a) is allowed and for this reason
current libstdc++'s swap implementation is not allowed
>From gcc-bugs-return-521059-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 12:16:04 2016
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Subject: [Bug rtl-optimization/70526] GCC 6 miscompiles Firefox JIT compiler
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |trippels at gcc dot gnu.org
Resolution|--- |INVALID
--- Comment #1 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
-Wstrict-aliasing=2 warns:
markus@x4 tmp % g++ -O2 -Wstrict-aliasing=2 test_fire.cpp
test_fire.cpp: In instantiation of ‘const T* AlignedStorage2<T>::addr() const
[with T = Register]’:
test_fire.cpp:41:52: required from here
test_fire.cpp:13:34: warning: dereferencing type-punned pointer will break
strict-aliasing rules [-Wstrict-aliasing]
const T* addr() const { return reinterpret_cast<const T*>(u.mBytes); }
-fno-strict-aliasing fixes the issue, thus invalid.
>From gcc-bugs-return-521060-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 12:26:06 2016
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Subject: [Bug c++/70528] [5/6 Regression] bogus error: constructor required before non-static data member
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--- Comment #1 from Ville Voutilainen <ville.voutilainen at gmail dot com> ---
A shorter reproducer for the funny part where the error arises:
template <class T, class U = decltype(T())>
struct I {
};
struct J {
struct K {
int First = 0;
};
I<K> FunctionMDInfo;
};
>From gcc-bugs-return-521061-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 12:31:50 2016
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Subject: [Bug other/70433] backslashes lost in dot file
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vries at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |patch
--- Comment #2 from vries at gcc dot gnu.org ---
https://gcc.gnu.org/ml/gcc-patches/2016-04/msg00161.html
>From gcc-bugs-return-521062-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 12:34:41 2016
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Subject: [Bug c++/70528] [5/6 Regression] bogus error: constructor required before non-static data member
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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>From gcc-bugs-return-521063-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 12:35:39 2016
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Subject: [Bug c++/70336] [5/6 regression] Incorrect Wconversion warning
Date: Mon, 04 Apr 2016 12:35:00 -0000
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--- Comment #10 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #8)
> Here -Wconversion will warn for many casesm even in 4.9, eventhough one
> could argue that say in the f4 case nothing is lost during conversion, or
There is an explicit cast, so this case is exactly equivalent to:
unsigned char
foo (unsigned char x, unsigned char y)
{
x = x | y;
return x;
}
This seems to me the same case as PR40752, and I would be happy not warning
about those and Ian agreed with me, thus I proposed a patch to that effect.
> Which is why I've been talking about VRP,
> when we start adding further and further cases where the implicit
> conversions can't alter the values, we'll reimplement big part of VRP in the
> FEs. And this has nothing to do with not really delayed folding (even when
> both C and C++ FEs now actually delay folding to some extents), to avoid the
> "false positives" from -Wconversion you then want more folding rather than
> less folding.
Of course, more intelligent static analysis (CCP, VRP, IPA) in the FEs would be
very useful, specially for other warnings such as -Wsign-compare. Clang is
doing some form of CCP and callgraph analysis to improve diagnostics and it is
still faster than GCC FEs.
But from reading the list of -Wconversion bugs in bugzilla, this is not what
people complain about. They complain about explicit casts being ignored, about
not being able to silence warnings for bit-fields and noisy warnings about
implicit integral promotions with operands of the same type, where the result
is converted back to the same type again. None of those need VRP to be fixed,
AFAICT.
In most cases, one wants enough analysis to see through implicit casts. This is
what shorten_compare et al. are doing. However, the fact that they are
optimisations and not analysis make them clumsy to use by -Wconversion and they
do not make distinctions between implicit vs. explicit casts, which is very
important for -Wconversion.
>From gcc-bugs-return-521064-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 12:37:09 2016
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Subject: [Bug c++/70528] [5/6 Regression] bogus error: constructor required before non-static data member
Date: Mon, 04 Apr 2016 12:37:00 -0000
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Seems related to PR 58328
>From gcc-bugs-return-521065-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 12:38:13 2016
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Subject: [Bug tree-optimization/70527] Missed fold for "(long int) x * 12 - (long int)(x + 1) * 12"
Date: Mon, 04 Apr 2016 12:38:00 -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> ---
Note the issue is (non-)canonicalization of (long)(x + 1). For optimal
re-assoc you'd want to canonicalize this to (long)x + 1L (with x + 1
having undefined behavior on overflow) and then to (long)x * 12 + 12.
But generally you do _not_ want to do this because you lose value-range info
and carry out the op in a larger mode (the former means the reverse transform
is not valid).
Generic folding has very limited capabilities here and GIMPLE reassoc currently
refuses to associate signed ops at all.
>From gcc-bugs-return-521066-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 12:39:56 2016
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Subject: [Bug c++/70531] New: Turning optimisation level 2 causes the output program to go into infinite loop
Date: Mon, 04 Apr 2016 12:39:00 -0000
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Bug ID: 70531
Summary: Turning optimisation level 2 causes the output program
to go into infinite loop
Product: gcc
Version: 5.3.1
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Created attachment 38176
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38176&action=edit
Source file causing the bug
While solving algorithm problems, I stumbled on a problem which I think is a
bug within the g++ compiler. You can see the source code in the attachment. If
I compile with g++ $(srcfile) -o output, the resulting executable works as
expected. But when I turn optimisations (-O2), resulting executable goes into
infinite loop and I must terminate it. This behaviour doesn't happen if I try
to use clang++ (both with optimisation on and off). I am using fedora 23 with
g++ version 5.3.1. If you need anything else, tell me.
>From gcc-bugs-return-521067-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 12:41:33 2016
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Subject: [Bug c++/53220] [4.7/4.8 Regression] g++ mis-compiles compound literals
Date: Mon, 04 Apr 2016 12:41:00 -0000
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--- Comment #22 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The added diagnostic rejects this, which clang and EDG accept:
extern "C" int printf(const char*, ...);
int main() {
using A = int[1];
printf("%p\n", A{1} );
}
ts.c:4:18: error: taking address of temporary array
printf("%p\n", A{1} );
^~~~
This doesn't use compound literals, and seems like valid C++ according to
[conv.array].
>From gcc-bugs-return-521068-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 12:47:13 2016
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Subject: [Bug c++/70528] [5/6 Regression] bogus error: constructor required before non-static data member
Date: Mon, 04 Apr 2016 12:47:00 -0000
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--- Comment #3 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #2)
> Seems related to PR 58328
Hmm, does it makes sense to compute exception specifications even with
-fno-exceptions (LLVM default build flag)?
>From gcc-bugs-return-521069-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 12:52:23 2016
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Subject: [Bug c++/70528] [5/6 Regression] bogus error: constructor required before non-static data member
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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> ---
In PR58328 there is no explicit ctor at all, in this case the source actually
has
K() = default;
With
K() {}
it works.
>From gcc-bugs-return-521071-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 12:54:51 2016
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Subject: [Bug rtl-optimization/70526] GCC 6 miscompiles Firefox JIT compiler
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--- Comment #2 from Marc Glisse <glisse at gcc dot gnu.org> ---
(In reply to Markus Trippelsdorf from comment #1)
> -Wstrict-aliasing=2 warns:
>
> markus@x4 tmp % g++ -O2 -Wstrict-aliasing=2 test_fire.cpp
> test_fire.cpp: In instantiation of ‘const T* AlignedStorage2<T>::addr()
> const [with T = Register]’:
> test_fire.cpp:41:52: required from here
> test_fire.cpp:13:34: warning: dereferencing type-punned pointer will break
> strict-aliasing rules [-Wstrict-aliasing]
> const T* addr() const { return reinterpret_cast<const T*>(u.mBytes); }
>
> -fno-strict-aliasing fixes the issue, thus invalid.
Isn't that a bit fast? -Wstrict-aliasing=3 doesn't warn, the read and the write
are both done in type Register. Reducing a bit:
typedef unsigned uint32_t;
template<typename T>
struct AlignedStorage2
{
char mBytes[sizeof(T)];
const T* addr() const { return reinterpret_cast<const T*>(mBytes); }
T* addr() { return reinterpret_cast<T*>(mBytes); }
};
struct Register {
uint32_t reg_;
};
class TypedOrValueRegister
{
AlignedStorage2<Register> typed;
__attribute__((noinline)) Register& dataTyped() { return *typed.addr(); }
public:
TypedOrValueRegister(Register reg)
{
dataTyped() = reg;
}
Register typedReg() const { return *typed.addr(); }
};
int main() {
Register reg = { 10u };
if (TypedOrValueRegister(reg).typedReg().reg_ != 10)
__builtin_abort();
return 0;
}
>From gcc-bugs-return-521070-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 12:54:31 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70362] Segmentation fault compiling scalar-by-value-4_x.c for ARM arch < 4
Date: Mon, 04 Apr 2016 12:54:00 -0000
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--- Comment #8 from Nick Clifton <nickc at gcc dot gnu.org> ---
(In reply to Ramana Radhakrishnan from comment #6)
> Fails at O0 in this case, I cannot type. I still think this is a tail from
> PR62254 and that should just be reopened.
I cannot reproduce this failure. Ie when I compile this test case everything
works, at -O0 all the way up to -O3.
This is with today's mainline sources, which has *both* of the patches from PR
62254 applied. These sources no longer contain this assertion:
gcc_assert (REG_P (operands[0]));
although they do contain:
gcc_assert (REG_P (outval) || SUBREG_P (outval));
If the problem really does exist, could someone tell me what outval looks like
when the assertion is triggered ?
Cheers
Nick
>From gcc-bugs-return-521072-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 12:56:08 2016
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Subject: [Bug target/62254] [4.9/5/6 Regression] gcc-4.9 ICEs on linux kernel zlib for armv3
Date: Mon, 04 Apr 2016 12:56:00 -0000
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--- Comment #19 from Nick Clifton <nickc at gcc dot gnu.org> ---
(In reply to Julien Margetts from comment #17)
> The following test case still fails with the patch applied (originally bug
> 70362)
>
> arm-none-eabi-gcc -march=armv3m -c -o c_compat_x_tst.o
> gcc/testsuite/gcc.dg/compat/scalar-by-value-4_x.c
I cannot reproduce this failure. Ie when I compile this test case everything
works, at -O0 all the way up to -O3.
This is with today's mainline sources, which has *both* of the patches from
this PR applied. These sources no longer contain this assertion:
gcc_assert (REG_P (operands[0]));
although they do contain:
gcc_assert (REG_P (outval) || SUBREG_P (outval));
If the problem really does exist, could someone tell me what outval looks like
when the assertion is triggered ?
Cheers
Nick
>From gcc-bugs-return-521073-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 13:00:36 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/70530] [DR2468] You should probably add addressof (a) != addressof (b) check to std::swap
Date: Mon, 04 Apr 2016 13:00:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |SUSPENDED
Last reconfirmed| |2016-04-04
Summary|You should probably add |[DR2468] You should
|addressof (a) != addressof |probably add addressof (a)
|(b) check to std::swap |!= addressof (b) check to
| |std::swap
Ever confirmed|0 |1
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Askar Safin from comment #0)
> C++ standard says standard library functions may assume rvalue reference
> arguments are unique, i. e. are not aliased to any other arguments (final
> draft C++14 N3690 17.6.4.9). I think this implies that move assignment for
> standard classes assume there will be no move assignment to itself. Also, I
> think this is good idea for other classes to assume the same.
That rule is actually defective, see:
http://cplusplus.github.io/LWG/lwg-active.html#2468
> As well as I know there is no any mention in the standard that std::swap
> argument should not point to the same object. So, code "swap (a, a)" is
> legit. Moreover, this code can appear in real programs. For example, this is
> code from http://en.cppreference.com/w/cpp/algorithm/iter_swap (as on
> 2016-04-02):
>
> // libstdc++'s general std::iter_swap just calls std::swap in c++11 mode
> template<class ForwardIt>
> void selection_sort(ForwardIt begin, ForwardIt end)
> {
> for (ForwardIt i = begin; i != end; ++i)
> std::iter_swap(i, std::min_element(i, end));
> }
>
> Current libstdc++ implementation of std::swap calls move constructor (ctor)
> one time and move assignment (op=) two times. If we call std::swap (a, a),
> then there will be move op= to itself.
>
> So, I think std::move should check whatever its arguments point to the same
> object.
That would not be conforming.
> It seems all standard classes will work correctly currently if we call
> std::swap (a, a) in stdlibc++. I. e. I cannot think about some concrete
> libstdc++ class where std::swap (a, a) will cause any damage. But still
> assuming rvalue reference is unique is good idea for other libraries, too.
> And this is possible that some library author will assume this and std::swap
> (a, a) will fail.
>
> So, what to do? My proposed solution is to fix std::swap. But there are
> other variants, of course. For example, remove rvalue ref uniqueness
> assumption from the standard. Or add requirement for code which calls
> std::swap. Even if you decide to fix std::swap, I think it still be good
> idea to modify the standard. For example, to stay explicitly that a =
> std::move (a) is not allowed for standard classes, that this is recommended
> for other class to assume there will be no code "a = std::move (a)", that
> swap (a, a) is allowed and for this reason current libstdc++'s swap
> implementation is not allowed
The more likely direction is to require self-move (and therefore self-swap) to
be valid for all standard classes.
>From gcc-bugs-return-521074-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 13:04:40 2016
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Subject: [Bug tree-optimization/70527] Missed fold for "(long int) x * 12 - (long int)(x + 1) * 12"
Date: Mon, 04 Apr 2016 13:04:00 -0000
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--- Comment #2 from Marc Glisse <glisse at gcc dot gnu.org> ---
(In reply to amker from comment #0)
> Seems "(long int) x * 12 - (long int)(x + 1) * 12" is missed in
> generic-simplify.
Interestingly, we manage just fine if 12 is replaced with a variable. The issue
seems to be that we replace a-y*12 by a+y*-12 before we detect the common
factor, so it might be as simple as moving code around. Although recognizing
constant factors that differ only by their sign seems useful as well.
>From gcc-bugs-return-521075-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 13:30:54 2016
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Subject: [Bug target/70525] generating 'vpandn' without the mode suffix, gnu as fails to assemble (-mavx512bw)
Date: Mon, 04 Apr 2016 13:30:00 -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 38177
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38177&action=edit
gcc6-pr70525.patch
As the patch shows, I see numerous problems. E.g. the use of <mask_operand3_1>
in define_insn that really wasn't meant to be masked and doesn't have
<mask_name> in the name, but the use of <mask_operand3_1> still makes it
masked.
Or the existence of masked V*[QH]I andnot - we really can't support there, as
there are no VPANDNB and VPANDNW instructions. Plus we have to make sure we
emit vpandnq or vpandnd for all 512-bit modes, there is no such vpandn
instruction.
>From gcc-bugs-return-521076-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 13:45:25 2016
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Subject: [Bug lto/68881] [6 Regression] UNRESOLVED/FAIL: gcc.dg/lto/attr-weakref-1 -O2 -flto
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Jan Hubicka <hubicka at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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Resolution|--- |FIXED
--- Comment #18 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-521077-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 13:50:22 2016
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Subject: [Bug rtl-optimization/70526] GCC 6 miscompiles Firefox JIT compiler
Date: Mon, 04 Apr 2016 13:50:00 -0000
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--- Comment #3 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Started with r223126. Richi?
>From gcc-bugs-return-521080-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 13:57:40 2016
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Subject: [Bug rtl-optimization/70526] GCC 6 miscompiles Firefox JIT compiler
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
This changed with r223126.
The *.optimized dump is the same between r223124 and r223126, but already there
we can see that SRA used the TypedOrValueRegister type for the read:
MEM[(struct &)&D.2403] ={v} {CLOBBER};
_2 = TypedOrValueRegister::dataTyped (&D.2403);
MEM[(struct Register *)_2] = 10;
SR.8_7 = MEM[(struct TypedOrValueRegister *)&D.2403];
D.2403 ={v} {CLOBBER};
if (SR.8_7 != 10)
and then the scheduler swaps the store of 10 with the load from the memory.
I'd say this testcase is invalid, but with placement new it would not be
invalid, the question is if it would still misbehave then.
>From gcc-bugs-return-521079-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 13:57:40 2016
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Subject: [Bug tree-optimization/68953] [6 Regression] [graphite] Wrong code w/ -O[12] -floop-nest-optimize
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--- Comment #4 from vries at gcc dot gnu.org ---
Created attachment 38178
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38178&action=edit
UDIFF
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Subject: [Bug tree-optimization/68953] [6 Regression] [graphite] Wrong code w/ -O[12] -floop-nest-optimize
Date: Mon, 04 Apr 2016 13:57:00 -0000
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--- Comment #3 from vries at gcc dot gnu.org ---
A way to look at the problem is to compare against the dump info for the
variant without the extra (redundant) dimension.
So, compare dump-info for -DEXTRADIM={0,1} for this source:
...
#if EXTRADIM
int yu[4][1] = { { 1 }, { 2 }, { 3 }, { 4 } };
int
main (void)
{
int zh, ro;
for (zh = 0; zh < 2; ++zh)
for (ro = 0; ro < 3; ++ro)
yu[ro][0] = yu[zh + 1][0];
return yu[0][0]; /* Should be 2, but returns 3. */
}
#else
int yu[4] = { 1, 2, 3, 4 };
int
main (void)
{
int zh, ro;
for (zh = 0; zh < 2; ++zh)
for (ro = 0; ro < 3; ++ro)
yu[ro] = yu[zh + 1];
return yu[0]; /* Returns 3. */
}
#endif
...
This shows a bit of the unified diff of the dump info. The fact that the data
references show no reads, is probably already indicative of a problem:
...
data references (
- reads: { S_4[i1, i2] -> [1, 1 + i1] : i1 >= 0 and i1 <= 1 and i2 <= 2 and i2
>= 0 }
- must_writes: { S_4[i1, i2] -> [1, i2] : i2 >= 0 and i2 <= 2 and i1 >= 0 and
i1 <= 1 }
+ reads: { }
+ must_writes: { S_4[i1, 0] -> [1, 0, 0] : i1 >= 0 and i1 <= 1 }
may_writes: { }
)
data dependences (
-{ S_4[i1, i2] -> S_4[i1, i2'] : i2' >= 1 + i1 and i2' <= 1 + i1 + i2 and i2'
>= 1 + i2 and i2' <= 2; S_4[0, i2] -> S_4[1, i2'] : i2' >= 2 - i2 and \
i2' <= i2 and i2 <= 2; S_4[0, 0] -> S_4[1, 0] }
+{ S_4[0, 0] -> S_4[1, 0] }
)
...
>From gcc-bugs-return-521081-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 14:01:21 2016
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Subject: [Bug c++/70531] Turning optimisation level 2 causes the output program to go into infinite loop
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James Greenhalgh <jgreenhalgh at gcc dot gnu.org> changed:
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--- Comment #1 from James Greenhalgh <jgreenhalgh at gcc dot gnu.org> ---
Try compiling and running with -fsanitize=undefined. You have a bug in your
logic that results in an out-of-bounds memory access:
.../ab2.cpp:97:26: runtime error: index -1 out of bounds for type 'long long
int [101]'
.../ab2.cpp:97:18: runtime error: index -1 out of bounds for type 'long long
int [101][101][101]'
Segmentation fault (core dumped)
(At least) this condition is in the wrong place:
if (xs > xe || ys > ye)
return 0;
When rec is called with arguments (0, -1, 0, -1) (as it will be), this
condition comes after the memory dereference at:
if (dp[xs][xe][ys][ye] != -1)
return dp[xs][xe][ys][ye];
So you will be trying to access dp[0][-1][0][-1] - which is invalid.
I haven't fully audited your code for other logic errors. Please check your
algorithm. For simple inputs I always get a crash, not an infinite loop - but
such is the nature of undefined behaviour. If your bug report relies on
particular input to cause the loop, you'll need to provide that. As it stands,
this looks invalid, but feel free to reopen it after you have audited your code
for other undefined sequences.
>From gcc-bugs-return-521082-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 14:06:42 2016
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Subject: [Bug target/70117] ppc long double isinf() is wrong?
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>From gcc-bugs-return-521083-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 14:09:42 2016
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Subject: [Bug libstdc++/70437] [6 Regression] Instantiation loop with pair and is_constructible
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--- Comment #1 from Ville Voutilainen <ville.voutilainen at gmail dot com> ---
Mine.
>From gcc-bugs-return-521084-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 14:12:45 2016
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Subject: [Bug target/70117] ppc long double isinf() is wrong?
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--- Comment #13 from Michael Meissner <meissner at gcc dot gnu.org> ---
In gcc/builtins.c it is probably better to use:
const struct real_format *fmt = FLOAT_MODE_FORMAT (mode);
if (fmt == &ibm_extended_double)
{
// ...
}
>From gcc-bugs-return-521085-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 14:30:31 2016
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Subject: [Bug libstdc++/70437] [6 Regression] Instantiation loop with pair and is_constructible
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--- Comment #2 from Ville Voutilainen <ville.voutilainen at gmail dot com> ---
Created attachment 38179
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First stab at a patch
Initial patch done, testsuite additions to follow, will submit once
compile-farm testing is done.
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Subject: [Bug c++/70528] [5/6 Regression] bogus error: constructor required before non-static data member
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Patrick Palka <ppalka at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #5 from Patrick Palka <ppalka at gcc dot gnu.org> ---
If comment #1 should be accepted, then should this be accepted too?
template <class T, class U = decltype(T())>
struct I {
};
struct J {
struct K {
int First = J::N;
};
I<K> FunctionMDInfo;
static const int N = 0;
};
>From gcc-bugs-return-521087-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 14:38:09 2016
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Subject: [Bug c++/70528] [5/6 Regression] bogus error: constructor required before non-static data member
Date: Mon, 04 Apr 2016 14:38:00 -0000
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--- Comment #6 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
(In reply to Patrick Palka from comment #5)
> If comment #1 should be accepted, then should this be accepted too?
>
> template <class T, class U = decltype(T())>
> struct I {
> };
>
> struct J {
> struct K {
> int First = J::N;
> };
> I<K> FunctionMDInfo;
> static const int N = 0;
> };
Clang rejects both.
>From gcc-bugs-return-521088-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 14:47:52 2016
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Subject: [Bug tree-optimization/70499] internal compiler error: in make_ssa_name_fn, at tree-ssanames.c:266
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The function needs to deal with cases where e.g. DECL_VALUE_EXPR is added to
various VAR_DECLs and the IL needs to be updated accordingtly. It is mostly
used by OpenMP lowering, and that is done not in SSA form, so that is why most
of its testcase coverage is without SSA.
Anyway, for the testcase, it would be perhaps better to use
typedef double v4df __attribute__((vector_size (32)));
and use v4df instead of __m256d (and immintrin.h include).
Is it inentional that hx and hy are uninitialized and y is unused? Shouldn't
hx be initialized to Value().data and hy to y.Value().data ?
>From gcc-bugs-return-521089-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 14:51:49 2016
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Subject: [Bug c++/70528] [5/6 Regression] bogus error: constructor required before non-static data member
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--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Yeah, and it rejects both #c1 and #c5 and the variants with K() = default;
So, unlike PR58328 here both compilers agree, and the disagreement is just
whether it is ok for libstdc++ to use the decltype?
>From gcc-bugs-return-521090-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 14:59:37 2016
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Subject: [Bug testsuite/70516] [4.9/5/6 Regression] Regtesting acats hangs on x86_64-apple-darwin15.4
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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> ---
Can you bisect it? There aren't that many changes that could affect anything
at all.
Any Ada processes (compiler or some testcase) hang?
>From gcc-bugs-return-521091-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 15:03:39 2016
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Subject: [Bug tree-optimization/70499] internal compiler error: in make_ssa_name_fn, at tree-ssanames.c:266
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--- Comment #4 from Matthias Hochsteger <matthias.hochsteger at tuwien dot ac.at> ---
This testcase is just a very striped-down version of the actual code to
reproduce the error, so it may seem useless at some spots, like the missing
initialization.
We already have a workaround by adding additional
__attribute__((__always_inline__))
to the methods of SIMD, in this sense it's no critical bug.
This code is part of a cross-platform project. We are including immintrin.h
since it is supplied by all used compilers. I am not sure how
typedef double v4df __attribute__((vector_size (32)));
behaves on others, but we will give it a try.
Thanks,
Matthias
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Subject: [Bug c++/70507] integer overflow builtins not constant expressions
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--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Thank you for the suggestion.
Storing values via pointers is not C++ 14 specific so the answer to your
question is that having the builtins be treated as constexpr would be useful in
both C++ 11 and C++ 14 modes. The modified example below should help explain
it:
constexpr int mul (int x, int y, int z = 0)
{
return __builtin_mul_overflow *(x, y, &z) ? 0 : z;
}
constexpr int z = mul (1234, 5678);
>From gcc-bugs-return-521093-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 15:13:02 2016
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Subject: [Bug c++/70528] [5/6 Regression] bogus error: constructor required before non-static data member
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--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I don't know how to implement is_default_constructible without using that
decltype, or something similar that will cause the same problem.
If we had a __is_constructible(_Tp, _Args...) builtin we could use that (for
is_constructible, and then define is_default_constructible in terms of that).
>From gcc-bugs-return-521094-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 15:18:24 2016
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Subject: [Bug tree-optimization/70499] internal compiler error: in make_ssa_name_fn, at tree-ssanames.c:266
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I haven't been talking on what you should be using in your project, but rather
what testcase we want to include in GCC sources. And there the immintrin.h
dependency IMHO is unnecessary etc.
>From gcc-bugs-return-521095-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 15:22:32 2016
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70499
--- Comment #6 from Matthias Hochsteger <matthias.hochsteger at tuwien dot ac.at> ---
Oh, now I get it, sorry for the misunderstanding.
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From: "ppalka at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70528] [5/6 Regression] bogus error: constructor required before non-static data member
Date: Mon, 04 Apr 2016 15:27:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70528
--- Comment #9 from Patrick Palka <ppalka at gcc dot gnu.org> ---
Here's something strange.
gcc rejects and clang accepts the following test case, but if decltype (A()) is
replaced by decltype (T()) then gcc accepts and clang rejects it.
template <class T>
struct H
{
template <typename A = T, typename = decltype (A())>
H ();
};
template <class T>
struct I {
H<T> u;
};
struct J {
struct K {
int First = 0;
};
I<K> FunctionMDInfo;
};
The error is still
error: constructor required before non-static data member for ‘J::K::First’ has
been parsed
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Subject: [Bug middle-end/70457] ICE (segfault) in gimple_expand_builtin_pow on powerpc64le-linux-gnu
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--- Comment #12 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Author: wschmidt
Date: Mon Apr 4 15:42:19 2016
New Revision: 234716
URL: https://gcc.gnu.org/viewcvs?rev=234716&root=gcc&view=rev
Log:
[gcc]
2016-04-04 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
Jakub Jelinek <jakub@redhat.com>
PR middle-end/70457
* tree-inline.c (estimate_num_insn): Use gimple_call_builtin_p
to ensure a call statement is compatible with a built-in's
prototype.
* tree-ssa-math-opts.c (pass_optimize_windening_mul::execute):
Likewise.
[gcc/testsuite]
2016-04-04 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
Jakub Jelinek <jakub@redhat.com>
PR middle-end/70457
* gcc.dg/torture/pr70457.c: New.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr70457.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-inline.c
trunk/gcc/tree-ssa-math-opts.c
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Subject: [Bug middle-end/70457] ICE (segfault) in gimple_expand_builtin_pow on powerpc64le-linux-gnu
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--- Comment #13 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Author: wschmidt
Date: Mon Apr 4 15:45:59 2016
New Revision: 234717
URL: https://gcc.gnu.org/viewcvs?rev=234717&root=gcc&view=rev
Log:
[gcc]
2016-04-04 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
Jakub Jelinek <jakub@redhat.com>
PR middle-end/70457
* tree-inline.c (estimate_num_insn): Use gimple_call_builtin_p
to ensure a call statement is compatible with a built-in's
prototype.
* tree-ssa-math-opts.c (execute_cse_sincos_1): Likewise.
(pass_cse_sincos::execute): Likewise.
(pass_optimize_widening_mul::execute): Likewise.
[gcc/testsuite]
2016-04-04 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
Jakub Jelinek <jakub@redhat.com>
PR middle-end/70457
* gcc.dg/torture/pr70457.c: New.
Added:
branches/gcc-5-branch/gcc/testsuite/gcc.dg/torture/pr70457.c
Modified:
branches/gcc-5-branch/gcc/ChangeLog
branches/gcc-5-branch/gcc/testsuite/ChangeLog
branches/gcc-5-branch/gcc/tree-inline.c
branches/gcc-5-branch/gcc/tree-ssa-math-opts.c
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Subject: [Bug middle-end/70457] ICE (segfault) in gimple_expand_builtin_pow on powerpc64le-linux-gnu
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--- Comment #14 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Author: wschmidt
Date: Mon Apr 4 15:47:51 2016
New Revision: 234718
URL: https://gcc.gnu.org/viewcvs?rev=234718&root=gcc&view=rev
Log:
[gcc]
2016-04-04 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
Jakub Jelinek <jakub@redhat.com>
PR middle-end/70457
* tree-inline.c (estimate_num_insn): Use gimple_call_builtin_p
to ensure a call statement is compatible with a built-in's
prototype.
* tree-ssa-math-opts.c (execute_cse_sincos_1): Likewise.
(execute_cse_sincos): Likewise.
(execute_optimize_widening_mul): Likewise.
[gcc/testsuite]
2016-04-04 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
Jakub Jelinek <jakub@redhat.com>
PR middle-end/70457
* gcc.dg/torture/pr70457.c: New.
Added:
branches/gcc-4_9-branch/gcc/testsuite/gcc.dg/torture/pr70457.c
Modified:
branches/gcc-4_9-branch/gcc/ChangeLog
branches/gcc-4_9-branch/gcc/testsuite/ChangeLog
branches/gcc-4_9-branch/gcc/tree-inline.c
branches/gcc-4_9-branch/gcc/tree-ssa-math-opts.c
>From gcc-bugs-return-521100-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 15:49:36 2016
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Subject: [Bug middle-end/70457] ICE (segfault) in gimple_expand_builtin_pow on powerpc64le-linux-gnu
Date: Mon, 04 Apr 2016 15:49:00 -0000
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--- Comment #15 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Matthias, the code is now fixed everywhere upstream. Do you need a merge into
ibm/gcc-5-branch?
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Subject: [Bug middle-end/70457] ICE (segfault) in gimple_expand_builtin_pow on powerpc64le-linux-gnu
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Bill Schmidt <wschmidt at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #16 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-521102-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 15:50:45 2016
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From: "ville.voutilainen at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70528] [5/6 Regression] bogus error: constructor required before non-static data member
Date: Mon, 04 Apr 2016 15:50:00 -0000
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--- Comment #10 from Ville Voutilainen <ville.voutilainen at gmail dot com> ---
(In reply to Jonathan Wakely from comment #8)
> I don't know how to implement is_default_constructible without using that
> decltype, or something similar that will cause the same problem.
>
> If we had a __is_constructible(_Tp, _Args...) builtin we could use that (for
> is_constructible, and then define is_default_constructible in terms of that).
It would be possible to push the use of the decltype into a separate trait,
which sorta-kinda papers over the problem, but then we have an
is_default_constructible that gives different results depending on where you
use it for such a nested type (before or after it's been parsed completely),
which is surely ill-formed NDR, and possibly an ODR violation as well. I can't
fathom how a builtin would change that problem.
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Subject: [Bug ipa/66223] [5/6 Regression] Diagnostic of pure virtual function call broken, including __cxa_pure_virtual
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66223
--- Comment #14 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Author: hubicka
Date: Mon Apr 4 15:54:39 2016
New Revision: 234719
URL: https://gcc.gnu.org/viewcvs?rev=234719&root=gcc&view=rev
Log:
PR ipa/66223
* ipa-devirt.c (maybe_record_node): Do not optimize cxa_pure_virtual
calls when sanitizing.
(possible_polymorphic_call_target_p)" FIx formating.
* g++.dg/ipa/devirt-51.C: New testcase.
Added:
trunk/gcc/testsuite/g++.dg/ipa/devirt-51.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/ipa-devirt.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-521104-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 15:55:39 2016
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From: "hubicka at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/66223] [5 Regression] Diagnostic of pure virtual function call broken, including __cxa_pure_virtual
Date: Mon, 04 Apr 2016 15:55:00 -0000
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Jan Hubicka <hubicka at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[5/6 Regression] Diagnostic |[5 Regression] Diagnostic
|of pure virtual function |of pure virtual function
|call broken, including |call broken, including
|__cxa_pure_virtual |__cxa_pure_virtual
--- Comment #15 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Fixed on mainline.
>From gcc-bugs-return-521105-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 15:58:53 2016
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From: "andre.simoesdiasvieira at arm dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/70379] c99_classification_macros_c++98.cc failing with newlib
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Andre Vieira <andre.simoesdiasvieira at arm dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #2 from Andre Vieira <andre.simoesdiasvieira at arm dot com> ---
Yaakov fixed this in newlib, commit hash
b9bbe1bccb1254ce891fc92961be2ec3cd3f6e4a
Thanks, closing ticket.
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Subject: [Bug c++/70529] Unhelpful diagnostic for hex float literals, inconsistent parsing
Date: Mon, 04 Apr 2016 16:01:00 -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> ---
So what do you suggest?
The thing is,
0x123p2
in C++11/C++14 is a single preprocessing token, but
0x123p-2
or
0x123p+2
are 3 preprocessing tokens:
pp-number:
digit
. digit
pp-number digit
pp-number identifier-nondigit
pp-number e sign
pp-number E sign
.
and identifier-nondigit is also a..z A..Z _ among others.
Only in C++17 0x123p-2 is a single preprocessing token, as
pp-number p sign
pp-number P sign
is added.
If you use -pedantic, then you'll get a warning (or with -pedantic-errors
error)
for all uses of hexadecimal floats.
So, either use the GNU extension modes (-std=gnu++11, -std=gnu++14), or wait
for -std=c++17.
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Subject: [Bug bootstrap/70173] make distclean: leaves stage_final and libcc1/compiler-name.h
Date: Mon, 04 Apr 2016 16:38:00 -0000
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--- Comment #5 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Author: segher
Date: Mon Apr 4 16:37:58 2016
New Revision: 234721
URL: https://gcc.gnu.org/viewcvs?rev=234721&root=gcc&view=rev
Log:
gnattools: Clean config.cache (PR70173)
The config.cache file should be deleted by "make distclean", just like
config.log and config.status . The directory itself is still not deleted
(just like the gotools and libcc1 directories).
gnattools/
PR bootstrap/70173
* Makefile.in (distclean): Also delete config.cache .
Modified:
trunk/gnattools/ChangeLog
trunk/gnattools/Makefile.in
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Subject: [Bug libstdc++/70379] c99_classification_macros_c++98.cc failing with newlib
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |craie at acm dot org
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
*** Bug 70176 has been marked as a duplicate of this bug. ***
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Subject: [Bug libstdc++/70176] Regression with C++03 Issue cstdio
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I'm closing this as a dup of PR 70379, please reopen and provide preprocessed
source if this is still a problem with the latest newlib code.
*** This bug has been marked as a duplicate of bug 70379 ***
>From gcc-bugs-return-521110-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 16:55:01 2016
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From: "cesar at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/70373] [openacc] ICE with reduction clause in set_parm_rtl, at cfgexpand.c
Date: Mon, 04 Apr 2016 16:55:00 -0000
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cesar at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |cesar at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |cesar at gcc dot gnu.org
--- Comment #1 from cesar at gcc dot gnu.org ---
This problem fails for similar reasons to PR70289. My forthcoming gimplifier
patch does resolve this issue.
>From gcc-bugs-return-521111-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 17:04:25 2016
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From: "vincent.picaud at laposte dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70532] New: An "constexpr + variable template" example that gives an "internal compiler error"
Date: Mon, 04 Apr 2016 17:04:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70532
Bug ID: 70532
Summary: An "constexpr + variable template" example that gives
an "internal compiler error"
Product: gcc
Version: 5.3.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: vincent.picaud at laposte dot net
Target Milestone: ---
Created attachment 38180
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38180&action=edit
code to reproduce bug + compilation error message
Dear GCC developpers,
-----------
* Maybe I found an internal bug in g++ 5.3.1
* The small code in attachement compiled with:
g++ -std=c++14 -v bugG++.cpp -o bugG++
gives an internal error:
bugG++.cpp:43:15: internal compiler error: Segmentation fault
constexpr int VariableTemplate =
^
0x84ce14 crash_signal
../../src/gcc/toplev.c:383
....
* The program compiles using clang++-3.7
------------
Beside that, I really love g++.
It is really a great compiler!
Thanks
VP
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/70307] [6 Regression] ICE: in gimplify_expr, at gimplify.c:10915 on valid code
Date: Mon, 04 Apr 2016 17:21:00 -0000
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--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Mon Apr 4 17:20:53 2016
New Revision: 234723
URL: https://gcc.gnu.org/viewcvs?rev=234723&root=gcc&view=rev
Log:
PR middle-end/70307
* gcc.dg/torture/pr70307.c: Add -Wno-psabi to dg-options. Prune
rs6000 ABI warnings.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/torture/pr70307.c
>From gcc-bugs-return-521113-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 17:28:12 2016
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From: "hubicka at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70018] [4.9/5/6 Regression] Possible issue around IPO and C++ comdats discovered as pure/const
Date: Mon, 04 Apr 2016 17:28:00 -0000
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Jan Hubicka <hubicka at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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Assignee|unassigned at gcc dot gnu.org |hubicka at gcc dot gnu.org
--- Comment #11 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
For
int *a;
bool t()
{
return *a==*a;
}
we get
$ more t.C.*original
;; Function bool t() (null)
;; enabled by -tree-original
return <retval> = 1;
even at -O0 while I think very stupid compiler is allowed to keep the memory
access.
In fact clang does precisely that:
_Z1tv: # @_Z1tv
.cfi_startproc
# BB#0:
pushq %rbp
.Ltmp0:
.cfi_def_cfa_offset 16
.Ltmp1:
.cfi_offset %rbp, -16
movq %rsp, %rbp
.Ltmp2:
.cfi_def_cfa_register %rbp
movq a, %rax
movl (%rax), %ecx
movq a, %rax
cmpl (%rax), %ecx
sete %dl
andb $1, %dl
movzbl %dl, %eax
popq %rbp
retq
.Ltmp3:
I am trying to make conservatively correct fix for this. I suppose we can still
discover functions seen as const/pure as pure and incrementally teach optimizer
that given function does possibly use global memory state but it doesn't depend
on it. It should be still correct to CSE those functions.
For that we finally need to cleanup pure/const/looping flags into sane form
(i.e. clobber memory/has side effects/is CSEable and uses no memory/is CSEable
and uses memory)
>From gcc-bugs-return-521114-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 17:54:58 2016
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Subject: [Bug c++/70512] [6 Regression] ICE on valid code on x86_64-linux-gnu: canonical types differ for identical types
Date: Mon, 04 Apr 2016 17:54:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mpolacek at gcc dot gnu.org
--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Jakub's testcase points to the issue here: in the original testcase, when we
parse the member declaration (operator=), we create a method with type struct
S, but because we haven't yet parsed the trailing attribute, the type doesn't
have any attributes, thus
7925 /* If the pointed-to type has the may_alias attribute set, force
7926 a TYPE_REF_CAN_ALIAS_ALL pointer to be generated. */
7927 if (lookup_attribute ("may_alias", TYPE_ATTRIBUTES (to_type)))
7928 can_alias_all = true;
in build_pointer_type_for_mode doesn't trigger. Some time after that we parse
the trailing attribute:
21318 /* Look for trailing attributes to apply to this class. */
21319 if (cp_parser_allow_gnu_extensions_p (parser))
21320 attributes = cp_parser_gnu_attributes_opt (parser);
And then we somehow arrive at finish_return_stmt -- and that will try to
convert 'this' to 'struct S', so it calls build_pointer_type again, but this
time we see the attribute and thus set TYPE_REF_CAN_ALIAS_ALL.
>From gcc-bugs-return-521115-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 18:16:25 2016
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Subject: [Bug tree-optimization/70357] [openacc][gomp4] ICE on reduction (+:sum) private (sum)
Date: Mon, 04 Apr 2016 18:16:00 -0000
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cesar at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
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CC| |cesar at gcc dot gnu.org
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Ever confirmed|0 |1
--- Comment #1 from cesar at gcc dot gnu.org ---
This should clearly be an error. My forthcoming patch for PR70289 will resolve
this issue.
>From gcc-bugs-return-521116-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 18:24:14 2016
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Subject: [Bug middle-end/70533] New: reductions on reference-typed variables are broken in OpenACC
Date: Mon, 04 Apr 2016 18:24:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70533
Bug ID: 70533
Summary: reductions on reference-typed variables are broken in
OpenACC
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Keywords: openacc
Severity: normal
Priority: P3
Component: middle-end
Assignee: cesar at gcc dot gnu.org
Reporter: cesar at gcc dot gnu.org
CC: tschwinge at gcc dot gnu.org
Target Milestone: ---
Target: x86_64-linux-gnu
Created attachment 38181
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38181&action=edit
reference reduction test case
I see this error when I try to build the attached test case in trunk:
reference-reduction.f90:5:0:
!$acc parallel reduction(+:v1) copy(v1)
internal compiler error: in lower_oacc_reductions, at omp-low.c:5589
0xd54cba lower_oacc_reductions
/home/cesar/openacc/trunk/gcc-mainline/gcc/omp-low.c:5589
0xd85065 lower_omp_target
/home/cesar/openacc/trunk/gcc-mainline/gcc/omp-low.c:16735
0xd86196 lower_omp_1
/home/cesar/openacc/trunk/gcc-mainline/gcc/omp-low.c:17050
0xd86692 lower_omp
/home/cesar/openacc/trunk/gcc-mainline/gcc/omp-low.c:17143
0xd85db4 lower_omp_1
/home/cesar/openacc/trunk/gcc-mainline/gcc/omp-low.c:16991
0xd86692 lower_omp
/home/cesar/openacc/trunk/gcc-mainline/gcc/omp-low.c:17143
0xd88482 execute_lower_omp
/home/cesar/openacc/trunk/gcc-mainline/gcc/omp-low.c:17878
0xd88526 execute
/home/cesar/openacc/trunk/gcc-mainline/gcc/omp-low.c:17915
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
I posted a patch to fix this issue several months ago, but that patch was never
reviewed <https://gcc.gnu.org/ml/gcc-patches/2016-02/msg01476.html>. I'll
rebase that patch and post it again.
>From gcc-bugs-return-521117-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 18:31:50 2016
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Subject: [Bug c++/70512] [6 Regression] ICE on valid code on x86_64-linux-gnu: canonical types differ for identical types
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Nathan Sidwell <nathan at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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CC| |nathan at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |nathan at gcc dot gnu.org
--- Comment #3 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Marek, I suspected something like what you say happening, I think we then need
to go through all the 'struct S' types created during the parse and modify
them?
Are you working on that? If so, please reassign this bug.
>From gcc-bugs-return-521118-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 18:38:35 2016
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Subject: [Bug c++/70512] [6 Regression] ICE on valid code on x86_64-linux-gnu: canonical types differ for identical types
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I'd note that we likely need to modify them in-place, as PARM_DECLs etc. with
those types already will be around.
for (t = TYPE_POINTER_TO (to_type); t; t = TYPE_NEXT_PTR_TO (t))
and
for (t = TYPE_REFERENCE_TO (to_type); t; t = TYPE_NEXT_REF_TO (t))
walking perhaps should do it.
>From gcc-bugs-return-521119-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 18:55:45 2016
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Subject: [Bug c++/70512] [6 Regression] ICE on valid code on x86_64-linux-gnu: canonical types differ for identical types
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70512
--- Comment #5 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
(In reply to Nathan Sidwell from comment #3)
> Are you working on that? If so, please reassign this bug.
I'm not currently. But I think the approach you outlines makes sense; I just
didn't get round to write any code.
>From gcc-bugs-return-521120-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 19:30:49 2016
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From: "cesar at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/70534] New: openacc parallel reductions aren't neutered
Date: Mon, 04 Apr 2016 19:30:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70534
Bug ID: 70534
Summary: openacc parallel reductions aren't neutered
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: cesar at gcc dot gnu.org
Reporter: cesar at gcc dot gnu.org
CC: tschwinge at gcc dot gnu.org
Target Milestone: ---
Created attachment 38182
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38182&action=edit
parallel reduction
The attached test case demonstrates a race condition on the code generated for
acc parallel reduction finalizers. According the OpenACC 2.0a spec, all of the
gang-private copies of the reduction variables are supposed to be combined with
the reduction operator with the original reduction variable at the end of the
parallel region. What's happen now is, there's no code to neuter the worker and
vector threads, so instead of preforming the reduction operation num_gangs
times, it potentially happens num_gangs * num_workers * vector_length times. A
solution to this problem would be to teach lower_oacc_reductions how to neuter
worker and vector threads for parallel reductions.
For clarification, this problem does not impact acc loop reductions inside acc
parallel regions. It only affects reductions on acc parallel constructs.
>From gcc-bugs-return-521121-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 19:31:15 2016
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Subject: [Bug middle-end/70534] openacc parallel reductions aren't neutered
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>From gcc-bugs-return-521122-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 19:43:36 2016
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Subject: [Bug middle-end/70535] New: broken nested reductions in openacc parallel regions
Date: Mon, 04 Apr 2016 19:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70535
Bug ID: 70535
Summary: broken nested reductions in openacc parallel regions
Product: gcc
Version: 6.0
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Keywords: openacc
Severity: normal
Priority: P3
Component: middle-end
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Created attachment 38183
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38183&action=edit
nested reductions
The attached test case demonstrates how the original reduction variable on the
host isn't being updated when the same variable is used in an acc parallel and
acc loop reduction.
It seems like the private 'acc parallel reduction' variable isn't being
remapped within the acc parallel region.
>From gcc-bugs-return-521124-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 19:54:17 2016
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Subject: [Bug c++/70532] An "constexpr + variable template" example that gives an "internal compiler error"
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
This problem is a duplicate of bug 70353 which has recently been fixed in 6.0
but not on the 5.x branch.
*** This bug has been marked as a duplicate of bug 70353 ***
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Subject: [Bug c++/70353] [5 regression] ICE on __PRETTY_FUNCTION__ in a constexpr function
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CC| |vincent.picaud at laposte dot net
--- Comment #19 from Martin Sebor <msebor at gcc dot gnu.org> ---
*** Bug 70532 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-521126-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 20:03:31 2016
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Subject: [Bug c++/70353] [5 regression] ICE on __PRETTY_FUNCTION__ in a constexpr function
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--- Comment #20 from Martin Sebor <msebor at gcc dot gnu.org> ---
*** Bug 66460 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-521127-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 20:03:32 2016
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Subject: [Bug c++/55004] [meta-bug] constexpr issues
Date: Mon, 04 Apr 2016 20:03:00 -0000
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Bug 55004 depends on bug 66460, which changed state.
Bug 66460 Summary: ICE using __func__ in constexpr function.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66460
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Subject: [Bug c++/66460] ICE using __func__ in constexpr function.
Date: Mon, 04 Apr 2016 20:03:00 -0000
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--- Comment #10 from Martin Sebor <msebor at gcc dot gnu.org> ---
Bug 70353 is a duplicate of this one. Although this report predates the
latter, I'm closing this one since 70353 is the one the fix for 6.0 has been
committed under.
*** This bug has been marked as a duplicate of bug 70353 ***
>From gcc-bugs-return-521128-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 20:22:56 2016
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Subject: [Bug rtl-optimization/70461] [6 Regression] Performance regression after r234527
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Alexander Fomin <afomin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Attachment #38134|0 |1
is obsolete| |
--- Comment #5 from Alexander Fomin <afomin at gcc dot gnu.org> ---
Created attachment 38184
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38184&action=edit
Another reproducer
Thanks, performance is back on Core CPUs.
However, I've noticed that given a slightly different testcase compiled with
-m32 -O2 we also generate extra insns for the loop (the degradation can be seen
on some other CPUs, e.g. when specifying -march=slm).
What I see in RTL ira dump is (with some identical lines removed):
+---------------------------------------------------------------+
| Before r234527 | After r234527 |
---------------------------------------+-------------------------
| Assigning 0 to a26r113 | Assigning 4 to a14r144 |
| Assigning 0 to a27r181 | Assigning 4 to a42r113 |
| Spilling a29r178 for a28r180 | Assigning 4 to a46r137 |
| Assigning 0 to a28r180 | Assigning 4 to a50r128 |
| Assigning 0 to a30r137 | Assigning 4 to a54r121 |
| Assigning 0 to a31r177 | Assigning 4 to a26r113 |
| Spilling a33r174 for a32r176 | Assigning 4 to a30r137 |
| Assigning 0 to a32r176 | Assigning 4 to a34r128 |
| Assigning 0 to a34r128 | Assigning 4 to a38r121 |
| Assigning 0 to a35r173 | |
| Spilling a37r170 for a36r172 | |
| Assigning 0 to a36r172 | |
| Assigning 0 to a38r121 | |
| Assigning 0 to a39r169 | |
| Spilling a41r166 for a40r168 | |
| Assigning 0 to a40r168 | |
| a41(r166,l1) -- (...) assign memory | |
| a29(r178,l1) -- (...) assign memory | |
| a33(r174,l1) -- (...) assign memory | |
| a37(r170,l1) -- (...) assign memory | |
+--------------------------------------+------------------------+
Looks like we don't consider spilling and memory more profitable anymore...
Could you please take a look?
>From gcc-bugs-return-521129-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 20:48:02 2016
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Subject: [Bug middle-end/14505] __builtin_constant_p(__func__) is not true
Date: Mon, 04 Apr 2016 20:48:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|NEW |RESOLVED
CC| |msebor at gcc dot gnu.org
Resolution|--- |WONTFIX
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
The documented purpose of the __builtin_constant_p intrinsic is "to determine
if a value is known to be constant at compile time." C11 specifies the
identifier as "static const char __func__[] = "..." defined at function scope.
While __func__ does qualify as an /address constant/ its value, or the address
of any other object with static storage duration, isn't known to GCC at compile
time.
Since no further update to this request has been made in over 10 years, and
since implementing it would result in an inconsistency with other static const
arrays (which are not treated as a constant expression by GCC), I'm going to
close it as WONTFIX.
If you have a compelling reason for this enhancement that would outweigh or
render moot the concerns above please feel free to reopen the request and
provide your rationale.
>From gcc-bugs-return-521130-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 21:41:59 2016
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Subject: [Bug rtl-optimization/30971] Wrong return value (Tail call optimization)
Date: Mon, 04 Apr 2016 21:41:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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--- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
In the absence of the requested feedback I'm going to close this bug report as
invalid. Please feel free to reopen it if you feel it is valid, and provide
additional information in support of it.
>From gcc-bugs-return-521131-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 22:00:38 2016
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Subject: [Bug target/70359] [6 Regression] Code size increase for ARM compared to gcc-5.3.0
Date: Mon, 04 Apr 2016 22:00:00 -0000
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--- Comment #15 from Fredrik Hederstierna <fredrik.hederstierna@securitas-direct.com> ---
Created attachment 38185
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tok.c
I took another example for CSiBE and stripped it down. I'm not 100% sure it is
the exact same issue, but looks similar so I attached it.
This gives bigger code for -Os -mcpu=arm966e-s -marm, and also for
-mcpu=cortex-m3, though arm7tdmi and cortex-m0 resulted in small code.
gcc 5.3.0:
00000000 <test>:
0: e92d4010 push {r4, lr}
4: e1a04000 mov r4, r0
8: ebfffffe bl 0 <next>
c: e3500000 cmp r0, #0
10: 0a000003 beq 24 <test+0x24>
14: e59f002c ldr r0, [pc, #44] ; 48 <test+0x48>
18: ebfffffe bl 0 <dump>
1c: e1a00004 mov r0, r4
20: eafffff8 b 8 <test+0x8>
24: e1a00004 mov r0, r4
28: ebfffffe bl 0 <next>
2c: e3500000 cmp r0, #0
30: 0a000002 beq 40 <test+0x40>
34: e59f000c ldr r0, [pc, #12] ; 48 <test+0x48>
38: ebfffffe bl 0 <dump>
3c: eafffff8 b 24 <test+0x24>
40: e1a00004 mov r0, r4
44: e8bd8010 pop {r4, pc}
48: 00000000 andeq r0, r0, r0
master:
00000000 <test>:
0: e92d4070 push {r4, r5, r6, lr}
4: e1a04000 mov r4, r0
8: ebfffffe bl 0 <next>
c: e59f5048 ldr r5, [pc, #72] ; 5c <test+0x5c>
10: e3500000 cmp r0, #0
14: 1a000006 bne 34 <test+0x34>
18: e1a00004 mov r0, r4
1c: ebfffffe bl 0 <next>
20: e59f5034 ldr r5, [pc, #52] ; 5c <test+0x5c>
24: e3500000 cmp r0, #0
28: 1a000006 bne 48 <test+0x48>
2c: e1a00004 mov r0, r4
30: e8bd8070 pop {r4, r5, r6, pc}
34: e1a00005 mov r0, r5
38: ebfffffe bl 0 <dump>
3c: e1a00004 mov r0, r4
40: ebfffffe bl 0 <next>
44: eafffff1 b 10 <test+0x10>
48: e1a00005 mov r0, r5
4c: ebfffffe bl 0 <dump>
50: e1a00004 mov r0, r4
54: ebfffffe bl 0 <next>
58: eafffff1 b 24 <test+0x24>
5c: 00000000 andeq r0, r0, r0
>From gcc-bugs-return-521133-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 22:19:26 2016
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Subject: [Bug c++/58062] [C++11] bogus __func__ lookup in lambda body
Date: Mon, 04 Apr 2016 22:19:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
C++ was clarified via core issue #1172
(www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#1772) to define the
__func__ identifier "at the beginning of the compound-statement of the
lambda-expression" rendering this bug report no longer valid (at least not in
C++ 14). I don't think it's worth implementing something different for C++ 11
so I'm closing this report as invalid. (I note that this is also consistent
with what Clang does.)
>From gcc-bugs-return-521132-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 22:19:26 2016
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Subject: [Bug c++/54367] [meta-bug] lambda expressions
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Bug 54367 depends on bug 58062, which changed state.
Bug 58062 Summary: [C++11] bogus __func__ lookup in lambda body
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58062
What |Removed |Added
----------------------------------------------------------------------------
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Resolution|--- |INVALID
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Subject: [Bug target/67172] [5/6 regression] i686-w64-mingw32 dwarf2 bootstrap fails with undefined reference to __EH_FRAME_BEGIN__
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--- Comment #9 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Author: ebotcazou
Date: Mon Apr 4 22:29:02 2016
New Revision: 234727
URL: https://gcc.gnu.org/viewcvs?rev=234727&root=gcc&view=rev
Log:
PR target/67172
* libgcc2.c (L__main): Undefine __LIBGCC_EH_FRAME_SECTION_NAME__ if
__MINGW32__ is defined.
Modified:
trunk/libgcc/ChangeLog
trunk/libgcc/libgcc2.c
>From gcc-bugs-return-521135-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 22:30:33 2016
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Subject: [Bug target/67172] [5/6 regression] i686-w64-mingw32 dwarf2 bootstrap fails with undefined reference to __EH_FRAME_BEGIN__
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67172
--- Comment #10 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Author: ebotcazou
Date: Mon Apr 4 22:29:45 2016
New Revision: 234728
URL: https://gcc.gnu.org/viewcvs?rev=234728&root=gcc&view=rev
Log:
PR target/67172
* libgcc2.c (L__main): Undefine __LIBGCC_EH_FRAME_SECTION_NAME__ if
__MINGW32__ is defined.
Modified:
branches/gcc-5-branch/libgcc/ChangeLog
branches/gcc-5-branch/libgcc/libgcc2.c
>From gcc-bugs-return-521136-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 22:31:50 2016
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From: "ebotcazou at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/67172] [5/6 regression] i686-w64-mingw32 dwarf2 bootstrap fails with undefined reference to __EH_FRAME_BEGIN__
Date: Mon, 04 Apr 2016 22:31:00 -0000
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #11 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
This will be fixed in 5.4 and later.
>From gcc-bugs-return-521137-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 22:56:02 2016
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From: "ed at catmur dot co.uk" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70536] New: g++ doesn't emit DW_AT_name for DW_TAG_GNU_formal_parameter_pack
Date: Mon, 04 Apr 2016 22:56:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70536
Bug ID: 70536
Summary: g++ doesn't emit DW_AT_name for
DW_TAG_GNU_formal_parameter_pack
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: ed at catmur dot co.uk
Target Milestone: ---
Per http://wiki.dwarfstd.org/index.php?title=C%2B%2B0x:_Variadic_templates
DW_TAG_GNU_formal_parameter_pack should have a DW_AT_name:
17$: DW_TAG_formal_parameter_pack
DW_AT_name("args")
18$: DW_TAG_formal_parameter
! no DW_AT_name attribute
DW_AT_type(reference to 13$)
(...)
I think this is just a typo in gcc/dwarf2out.c:
diff --git a/gcc/dwarf2out.c b/gcc/dwarf2out.c
index d48895c..d5e09d0 100644
--- a/gcc/dwarf2out.c
+++ b/gcc/dwarf2out.c
@@ -17497,7 +17497,7 @@ gen_formal_parameter_pack_die (tree parm_pack,
&& subr_die);
parm_pack_die = new_die (DW_TAG_GNU_formal_parameter_pack, subr_die,
parm_pack);
- add_src_coords_attributes (parm_pack_die, parm_pack);
+ add_name_and_src_coords_attributes (parm_pack_die, parm_pack);
for (arg = pack_arg; arg; arg = DECL_CHAIN (arg))
{
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Ed Catmur <ed at catmur dot co.uk> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ed at catmur dot co.uk
--- Comment #1 from Ed Catmur <ed at catmur dot co.uk> ---
Created attachment 38186
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38186&action=edit
dw_tag_gnu_formal_parameter_pack_dw_at_name.patch
Patch.
>From gcc-bugs-return-521139-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 04 23:07:11 2016
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Subject: [Bug middle-end/14505] __builtin_constant_p(__func__) is not true
Date: Mon, 04 Apr 2016 23:07:00 -0000
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Alex Rosenberg <alexr at leftfield dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |ASSIGNED
Resolution|WONTFIX |---
--- Comment #4 from Alex Rosenberg <alexr at leftfield dot org> ---
In the new world where C++ constexpr can do this kind of thing, I wonder if
this definition for __builtin_constant_p() is still desirable.
(This bug hasn't been updated in a decade because I was busy working on LLVM
instead.)
Since Clang tries for reasonable compatibility with GCC language extensions
like this, having a more rational definition of __builtin_constant_p() going
forward would be desirable for both compilers.
>From gcc-bugs-return-521140-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 00:01:24 2016
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Subject: [Bug target/70117] ppc long double isinf() is wrong?
Date: Tue, 05 Apr 2016 00:01:00 -0000
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--- Comment #14 from Alan Modra <amodra at gmail dot com> ---
> if (fmt == &ibm_extended_double)
No, there is mips_extended_format too.
>From gcc-bugs-return-521141-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 00:24:20 2016
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Subject: [Bug middle-end/14505] __builtin_constant_p(__func__) is not true
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |NEW
--- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
Thank you for the feedback.
Having __builtin_constant_p(__func__) return 1 in C++ constexpr contexts makes
sense since it's accepted there (starting with r234530) and treated as a
constant expression. That it doesn't in 6.0 is likely an oversight. However,
as evident from a recent discussion on core@lists.isocpp.org, whether or not
__func__ was or is intended be allowed in constexpr functions to begin with is
a subject of ongoing discussion.
On the other hand, it wouldn't be right to do the same thing outside constexpr
constexts or in GCC (i.e., in C mode, as in the example in comment #0) unless
__func__ (or similar objects) really were treated as a compile-time constant.
Of course, if the GCC definition for __builtin_constant_p() were to change, the
value it returned for a given expression would be subject to this new
definition. If that's the direction you would like to go I suggest to start by
coming up with and proposing the new definition to see what implementation
changes it might require and whether there is consensus to adopt it.
(I've reset the status from Assigned back to New since you didn't assign the
bug to anyone when reopening it.)
>From gcc-bugs-return-521142-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 01:20:46 2016
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From: "ppalka at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70452] [5/6 Regression] Regression in C++ parsing performance between 4.9.3 and 5.3.1
Date: Tue, 05 Apr 2016 01:20:00 -0000
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--- Comment #9 from Patrick Palka <ppalka at gcc dot gnu.org> ---
Author: ppalka
Date: Tue Apr 5 01:20:00 2016
New Revision: 234732
URL: https://gcc.gnu.org/viewcvs?rev=234732&root=gcc&view=rev
Log:
Remove class cache_map and use ggc hash_maps instead (PR c++/70452)
gcc/cp/ChangeLog:
PR c++/70452
* cp-tree.h (class cache_map): Remove.
* constexpr.c (cv_cache): Change type to
GTY((deletable)) hash_map<tree, tree> *.
(maybe_constant_value): Adjust following the change to cv_cache.
(clear_cv_cache): New static function.
(clear_cv_and_fold_caches): Use it.
* cp-gimplify.c (fold_cache): Change type to
GTY((deletable)) hash_map<tree, tree> *.
(clear_fold_cache): Adjust following the change to fold_cache.
(cp_fold): Likewise.
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/constexpr.c
trunk/gcc/cp/cp-gimplify.c
trunk/gcc/cp/cp-tree.h
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From: "guy at ivorydungeon dot net" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug driver/70537] New: ICE segfault compiling jar with gcj
Date: Tue, 05 Apr 2016 03:06:00 -0000
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Bug ID: 70537
Summary: ICE segfault compiling jar with gcj
Product: gcc
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I am attempting to compile an existing jar (source:
https://github.com/antlr/antlr4/ - jar:
http://www.antlr.org/download/antlr-4.5.3-complete.jar) to native object using
gcj and am consistently hitting an internal compiler error as shown below:
$ gcj -Wall -fpic -c antlr-4.5.3-complete.jar -o antlr-4.5.3-complete.o
In file included from org/antlr/v4/codegen/model/AddToLabelList.java:46:0,
from org/antlr/v4/codegen/model/Action.java:81,
from org/antlr/v4/codegen/LexerFactory.java:35,
from org/antlr/v4/codegen/DefaultOutputModelFactory.java:144,
from org/antlr/v4/codegen/CodeGenPipeline.java:126,
from org/antlr/v4/codegen/CodeGeneratorExtension.java:95,
from org/antlr/v4/codegen/CodeGenerator.java:51,
from org/antlr/v4/codegen/BlankOutputModelFactory.java:128,
from org/antlr/v4/codegen/ActionTranslator.java:114,
from org/antlr/v4/codegen/ActionTranslator.java:183,
from org/antlr/v4/automata/TailEpsilonRemover.java:80,
from org/antlr/v4/automata/ParserATNFactory.java:98,
from org/antlr/v4/automata/LexerATNFactory.java:96,
from org/antlr/v4/automata/ATNVisitor.java:61,
from org/antlr/v4/automata/ATNPrinter.java:137,
from org/antlr/v4/automata/ATNOptimizer.java:168,
from org/antlr/v4/automata/ATNFactory.java:1,
from org/antlr/v4/automata/ATNFactory.java:58,
from
org/antlr/v4/analysis/LeftRecursiveRuleTransformer.java:273,
from org/antlr/v4/analysis/LeftRecursiveRuleAnalyzer.java:438,
from org/antlr/v4/analysis/LeftRecursiveRuleAnalyzer.java:74,
from org/antlr/v4/analysis/LeftRecursiveRuleAltInfo.java:65,
from org/antlr/v4/analysis/LeftRecursionDetector.java:153,
from org/antlr/v4/analysis/AnalysisPipeline.java:49,
from <built-in>:3:
org/antlr/v4/codegen/model/AltBlock.java:50:0: internal compiler error:
Segmentation fault
This output is from gcj 5.2.1 provided by Ubuntu's gcj-jdk package:
$ gcj -v
Using built-in specs.
Reading specs from /usr/lib/gcc/x86_64-linux-gnu/5/libgcj.spec
rename spec startfile to startfileorig
rename spec lib to liborig
COLLECT_GCC=gcj
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/5/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu 5.2.1-22ubuntu2'
--with-bugurl=file:///usr/share/doc/gcc-5/README.Bugs
--enable-languages=c,ada,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-5 --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --with-system-zlib
--disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo
--with-java-home=/usr/lib/jvm/java-1.5.0-gcj-5-amd64/jre --enable-java-home
--with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-5-amd64
--with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-5-amd64
--with-arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar
--enable-objc-gc --enable-multiarch --disable-werror --with-arch-32=i686
--with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib
--with-tune=generic --enable-checking=release --build=x86_64-linux-gnu
--host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 5.2.1 20151010 (Ubuntu 5.2.1-22ubuntu2)
But it also occurs in 5.3.0 as provided by Arch gcc-gcj
Sometimes the error will manifest as either:
*** Error in `/usr/lib/gcc/x86_64-linux-gnu/5/jc1': free(): invalid next size
(fast): 0x00000000024337d0 ***
or
*** Error in `/usr/lib/gcc/x86_64-linux-gnu/5/jc1': corrupted double-linked
list: 0x000000000342a820 ***
followed by hanging indefinitely
>From gcc-bugs-return-521144-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 04:40:32 2016
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From: "jim at meyering dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70538] New: deprecated "access declaration" evokes gcc_unreachable ICE
Date: Tue, 05 Apr 2016 04:40:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70538
Bug ID: 70538
Summary: deprecated "access declaration" evokes gcc_unreachable
ICE
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: jim at meyering dot net
Target Milestone: ---
While attempting to emit a diagnostic following this warning,
x.ii:11:3: warning: access declarations are deprecated in favour of
using-declarations; suggestion: add the ‘using’ keyword [-Wdeprecated]
gcc reaches a gcc_unreachable call at gcc/cp/pt.c:17317:
17312 /* Look for the clone. */
17313 FOR_EACH_CLONE (clone, spec)
17314 if (DECL_NAME (clone) == DECL_NAME (tmpl))
17315 return clone;
17316 /* We should always have found the clone by now. */
17317 gcc_unreachable ();
17318 return NULL_TREE;
Here is a 'creduce'd input that triggers that error:
$ g++ --version|head -1 && cat x.ii && ./cc1plus x.ii
g++ (GCC) 6.0.0 20160405 (experimental)
struct A;
template <typename> class C;
using PathComponentPiece = C<int>;
class B {
B(int);
template <typename T> B(T);
B(C<A>);
};
template <typename> class C : B {
using base_type = B;
base_type::base_type;
PathComponentPiece m_fn1() {}
};
x.ii:11:3: warning: access declarations are deprecated in favour of
using-declarations; suggestion: add the ‘using’ keyword [-Wdeprecated]
base_type::base_type;
^~~~~~~~~
x.ii: In substitution of ‘template<class T> C<A>::C(T) [with T = int]’:
x.ii:11:14: recursively required by substitution of ‘template<class T>
C<A>::C(T) [with T = int]’
x.ii:11:14: required from ‘class C<int>’
x.ii:12:30: required from here
x.ii:11:14: internal compiler error: in instantiate_template_1, at
cp/pt.c:17317
base_type::base_type;
^~~~~~~~~
0x62362a instantiate_template_1
../../gcc/cp/pt.c:17317
0x623a1c instantiate_template(tree_node*, tree_node*, int)
../../gcc/cp/pt.c:17449
0x624326 fn_type_unification(tree_node*, tree_node*, tree_node*, tree_node*
const*, unsigned int, tree_node*, unification_kind_t, int, bool, bool)
../../gcc/cp/pt.c:17808
0x5d085d add_template_candidate_real
../../gcc/cp/call.c:3089
0x5d0fbc add_template_candidate
../../gcc/cp/call.c:3171
0x5d0fbc add_candidates
../../gcc/cp/call.c:5344
0x5ce443 build_user_type_conversion_1
../../gcc/cp/call.c:3687
0x5cee30 implicit_conversion
../../gcc/cp/call.c:1863
0x5d02b8 add_function_candidate
../../gcc/cp/call.c:2121
0x5d0f5f add_candidates
../../gcc/cp/call.c:5354
0x5d14f4 build_new_method_call_1
../../gcc/cp/call.c:8293
0x5d14f4 build_new_method_call(tree_node*, tree_node*, vec<tree_node*, va_gc,
vl_embed>**, tree_node*, int, tree_node**, int)
../../gcc/cp/call.c:8489
0x6b5bce locate_fn_flags
../../gcc/cp/method.c:900
0x6b65d8 synthesized_method_walk
../../gcc/cp/method.c:1477
0x6b6f54 deduce_inheriting_ctor(tree_node*)
../../gcc/cp/method.c:1711
0x61273c tsubst_decl
../../gcc/cp/pt.c:11941
0x614b94 tsubst(tree_node*, tree_node*, int, tree_node*)
../../gcc/cp/pt.c:12817
0x6238b5 instantiate_template_1
../../gcc/cp/pt.c:17398
0x623a1c instantiate_template(tree_node*, tree_node*, int)
../../gcc/cp/pt.c:17449
0x623480 instantiate_template_1
../../gcc/cp/pt.c:17307
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
>From gcc-bugs-return-521145-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 04:46:46 2016
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From: "jim at meyering dot net" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70538] deprecated "access declaration" evokes gcc_unreachable ICE
Date: Tue, 05 Apr 2016 04:46:00 -0000
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--- Comment #1 from jim at meyering dot net ---
FYI, that same ICE strikes also with gcc-4.9.3, gcc-5.1.0 and gcc-5.3.0 when
using -std=c++11
>From gcc-bugs-return-521146-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 04:49:17 2016
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Subject: [Bug c++/70538] deprecated "access declaration" evokes gcc_unreachable ICE
Date: Tue, 05 Apr 2016 04:49:00 -0000
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--- Comment #2 from jim at meyering dot net ---
Small correction:
It's not "while attempting to emit...", but rather "after emitting that
warning".
>From gcc-bugs-return-521147-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 05:23:56 2016
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From: "su at cs dot ucdavis.edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70540] New: ICE on invalid code on x86_64-linux-gnu in cxx_incomplete_type_diagnostic, at cp/typeck2.c:569
Date: Tue, 05 Apr 2016 05:23:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70540
Bug ID: 70540
Summary: ICE on invalid code on x86_64-linux-gnu in
cxx_incomplete_type_diagnostic, at cp/typeck2.c:569
Product: gcc
Version: 6.0
Status: UNCONFIRMED
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Target Milestone: ---
The following code causes an ICE when compiled with the current GCC trunk on
x86_64-linux-gnu in both 32-bit and 64-bit modes.
It is a regression from 5.3.x.
$ g++-trunk -v
Using built-in specs.
COLLECT_GCC=g++-trunk
COLLECT_LTO_WRAPPER=/usr/local/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/6.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto
--prefix=/usr/local/gcc-trunk --disable-bootstrap
Thread model: posix
gcc version 6.0.0 20160404 (experimental) [trunk revision 234712] (GCC)
$
$ g++-5.3 -c small.cpp
small.cpp: In function ‘void foo()’:
small.cpp:4:8: error: ‘f’ does not name a type
auto f = [&] { return f; };
^
$
$ g++-trunk -c small.cpp
small.cpp: In lambda function:
small.cpp:4:25: error: use of ‘f’ before deduction of ‘auto’
auto f = [&] { return f; };
^
small.cpp:4:25: error: use of ‘foo()::<lambda()>::<f capture>’ before deduction
of ‘auto’
small.cpp:4:28: internal compiler error: in cxx_incomplete_type_diagnostic, at
cp/typeck2.c:569
auto f = [&] { return f; };
^
0x6ce8e3 cxx_incomplete_type_diagnostic(tree_node const*, tree_node const*,
diagnostic_t)
../../gcc-source-trunk/gcc/cp/typeck2.c:569
0x765f99 complete_type_or_maybe_complain(tree_node*, tree_node*, int)
../../gcc-source-trunk/gcc/cp/typeck.c:150
0x7c37fc apply_deduced_return_type(tree_node*, tree_node*)
../../gcc-source-trunk/gcc/cp/semantics.c:9226
0x7342a2 cp_parser_lambda_body
../../gcc-source-trunk/gcc/cp/parser.c:10256
0x7342a2 cp_parser_lambda_expression
../../gcc-source-trunk/gcc/cp/parser.c:9756
0x734c9c cp_parser_primary_expression
../../gcc-source-trunk/gcc/cp/parser.c:4933
0x736d26 cp_parser_postfix_expression
../../gcc-source-trunk/gcc/cp/parser.c:6690
0x73fe6c cp_parser_unary_expression
../../gcc-source-trunk/gcc/cp/parser.c:7988
0x7406c7 cp_parser_cast_expression
../../gcc-source-trunk/gcc/cp/parser.c:8665
0x740cc5 cp_parser_binary_expression
../../gcc-source-trunk/gcc/cp/parser.c:8767
0x7415b0 cp_parser_assignment_expression
../../gcc-source-trunk/gcc/cp/parser.c:9055
0x7419ea cp_parser_constant_expression
../../gcc-source-trunk/gcc/cp/parser.c:9323
0x742174 cp_parser_initializer_clause
../../gcc-source-trunk/gcc/cp/parser.c:20793
0x74391b cp_parser_initializer
../../gcc-source-trunk/gcc/cp/parser.c:20734
0x752bce cp_parser_init_declarator
../../gcc-source-trunk/gcc/cp/parser.c:18604
0x7532b0 cp_parser_simple_declaration
../../gcc-source-trunk/gcc/cp/parser.c:12379
0x7535c1 cp_parser_block_declaration
../../gcc-source-trunk/gcc/cp/parser.c:12248
0x754018 cp_parser_declaration_statement
../../gcc-source-trunk/gcc/cp/parser.c:11860
0x7326db cp_parser_statement
../../gcc-source-trunk/gcc/cp/parser.c:10528
0x732ffc cp_parser_statement_seq_opt
../../gcc-source-trunk/gcc/cp/parser.c:10806
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
$
----------------------------------
void
foo ()
{
auto f = [&] { return f; };
}
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Subject: [Bug sanitizer/70541] New: unnoticed invalid dereference when using address sanitizer
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Bug ID: 70541
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sanitizer
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Component: sanitizer
Assignee: unassigned at gcc dot gnu.org
Reporter: christof.warlich at siemens dot com
CC: dodji at gcc dot gnu.org, dvyukov at gcc dot gnu.org,
jakub at gcc dot gnu.org, kcc at gcc dot gnu.org
Target Milestone: ---
The code below was ccompiled as:
$ gcc -fsanitize=address -fno-omit-frame-pointer -g sanitize.c
When executing the result, the sanitizer only complains about the
invalid dereference of the second printf statement, while the first
one goes unnoticed.
#include
#include
struct Simple {
int value;
};
int f(struct Simple simple) {
return simple.value;
}
int g(int value) {
return value;
}
int main() {
struct Simple *psimple = (struct Simple *) malloc(sizeof(struct Simple));
psimple->value = 42;
free(psimple);
printf("%d\n", f(*psimple));
int *pint = (int *) malloc(sizeof(int));
*pint = 24;
free(pint);
printf("%d\n", g(*pint));
return 0;
}
$ gcc-5 -v
Using built-in specs.
COLLECT_GCC=gcc-5
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/5/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu
5.3.0-3ubuntu1~14.04' --with-bugurl=file:///usr/share/doc/gcc-5/README.Bugs
--enable-languages=c,ada,c++,java,go,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-5 --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=gcc4-compatible --disable-libstdcxx-dual-abi
--enable-gnu-unique-object --disable-vtable-verify --enable-libmpx
--enable-plugin --with-system-zlib --disable-browser-plugin
--enable-java-awt=gtk --enable-gtk-cairo
--with-java-home=/usr/lib/jvm/java-1.5.0-gcj-5-amd64/jre --enable-java-home
--with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-5-amd64
--with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-5-amd64
--with-arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar
--enable-objc-gc --enable-multiarch --disable-werror --with-arch-32=i686
--with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib
--with-tune=generic --enable-checking=release --build=x86_64-linux-gnu
--host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 5.3.0 20151204 (Ubuntu 5.3.0-3ubuntu1~14.04)
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Subject: [Bug c++/70540] [6 Regression] ICE on invalid code on x86_64-linux-gnu in cxx_incomplete_type_diagnostic, at cp/typeck2.c:569
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-invalid-code
CC| |mpolacek at gcc dot gnu.org
Target Milestone|--- |6.0
Summary|ICE on invalid code on |[6 Regression] ICE on
|x86_64-linux-gnu in |invalid code on
|cxx_incomplete_type_diagnos |x86_64-linux-gnu in
|tic, at cp/typeck2.c:569 |cxx_incomplete_type_diagnos
| |tic, at cp/typeck2.c:569
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Started with r225272.
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Subject: [Bug c++/70540] ICE on invalid code on x86_64-linux-gnu in cxx_incomplete_type_diagnostic, at cp/typeck2.c:569
Date: Tue, 05 Apr 2016 06:29:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|6.0 |4.9.4
Summary|[6 Regression] ICE on |ICE on invalid code on
|invalid code on |x86_64-linux-gnu in
|x86_64-linux-gnu in |cxx_incomplete_type_diagnos
|cxx_incomplete_type_diagnos |tic, at cp/typeck2.c:569
|tic, at cp/typeck2.c:569 |
--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Eh, no, that is just a change of default -std. With -std=c++14 even g++4.9
ICEs.
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Subject: [Bug c++/70540] ICE on invalid code on x86_64-linux-gnu in cxx_incomplete_type_diagnostic, at cp/typeck2.c:569
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Subject: [Bug middle-end/14505] __builtin_constant_p(__func__) is not true
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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 #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Returning 1 for addresses of objects is highly undesirable. Not only it isn't
really constant on many targets or with many options (e.g. in shared libraries,
or PIE executables), but even in position dependent code you don't know the
address at compile time, only at link time. And, as we don't return 1 for any
object addresses, so why should __func__ be an exception?
Try:
int
foo ()
{
static int a;
static const int b = 3;
static const char c[3] = "ab";
static const char *d = "cd";
static const char *const e = "ef";
return 1 * __builtin_constant_p (&a)
+ 2 * __builtin_constant_p (&b)
+ 4 *__builtin_constant_p (c)
+ 8 * __builtin_constant_p (c[0])
+ 16 *__builtin_constant_p (d)
+ 32 * __builtin_constant_p (d[0])
+ 64 *__builtin_constant_p (e)
+ 128 * __builtin_constant_p (e[0]);
}
The returned value is 8 + 32 + 128, which is IMHO right, what is really
constant are the individual characters of the string literals.
So, if you want to test whether __func__ is constant, you should test whether
e.g. __func__[0] is __builtin_constant_p, the address of that can be anything
and is not known at compile time.
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Subject: [Bug middle-end/14505] __builtin_constant_p(__func__) is not true
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--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Talking about clang, it gets it wrong, returns 0.
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Subject: [Bug c++/70540] ICE on invalid code on x86_64-linux-gnu in cxx_incomplete_type_diagnostic, at cp/typeck2.c:569
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--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
commit f153f0531fbf0c8a5454ba6662b8819a6831bea6
Author: jason <jason@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Sun Mar 17 02:41:22 2013 +0000
PR c++/54277
* cp-tree.h (WILDCARD_TYPE_P): Split out from...
(MAYBE_CLASS_TYPE_P): ...here.
* semantics.c (lambda_capture_field_type): Only build a
magic decltype for wildcard types.
(lambda_proxy_type): Likewise.
(finish_non_static_data_member): Get the quals from
the object.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@196747
138bc75d-0d04-0410-961f-82ee72b054a4
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Subject: [Bug target/70510] ICE: output_operand: invalid %-code with -mavx512bw -masm=intel when emitting vpbroatcast
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--- Comment #2 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Kirill Yukhin from comment #1)
> will take a look.
I have patch in testing:
-- cut here--
diff --git a/gcc/config/i386/sse.md b/gcc/config/i386/sse.md
index 5fd650f..16ec696 100644
--- a/gcc/config/i386/sse.md
+++ b/gcc/config/i386/sse.md
@@ -705,7 +705,8 @@
;; Pointer size override for scalar modes (Intel asm dialect)
(define_mode_attr iptr
- [(V32QI "b") (V16HI "w") (V8SI "k") (V4DI "q")
+ [(V64QI "b") (V32HI "w") (V16SI "k") (V8DI "q")
+ (V32QI "b") (V16HI "w") (V8SI "k") (V4DI "q")
(V16QI "b") (V8HI "w") (V4SI "k") (V2DI "q")
(V8SF "k") (V4DF "q")
(V4SF "k") (V2DF "q")
--cut here--
>From gcc-bugs-return-521156-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 06:41:45 2016
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug java/70537] ICE segfault compiling jar with gcj
Date: Tue, 05 Apr 2016 06:41:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70537
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-05
CC| |aph at gcc dot gnu.org,
| |jakub at gcc dot gnu.org
Component|driver |java
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Trying this with current trunk I get:
.../gcc/gcj -B .../gcc/ -B .../x86_64-pc-linux-gnu/libjava/ -bootclasspath
.../x86_64-pc-linux-gnu/libjava/libgcj-6.0.0.jar -Wall -fpic -c
antlr-4.5.3-complete.jar -o antlr-4.5.3-complete.o
In file included from org/antlr/v4/codegen/CodeGenPipeline.java:126:0,
from org/antlr/v4/codegen/CodeGeneratorExtension.java:126,
from org/antlr/v4/codegen/CodeGenerator.java:82,
from org/antlr/v4/codegen/BlankOutputModelFactory.java:128,
from org/antlr/v4/codegen/ActionTranslator.java:145,
from org/antlr/v4/codegen/ActionTranslator.java:338,
from org/antlr/v4/automata/TailEpsilonRemover.java:111,
from org/antlr/v4/automata/ParserATNFactory.java:98,
from org/antlr/v4/automata/LexerATNFactory.java:96,
from org/antlr/v4/automata/ATNVisitor.java:123,
from org/antlr/v4/automata/ATNPrinter.java:168,
from org/antlr/v4/automata/ATNOptimizer.java:199,
from org/antlr/v4/automata/ATNFactory.java:63,
from org/antlr/v4/automata/ATNFactory.java:89,
from
org/antlr/v4/analysis/LeftRecursiveRuleTransformer.java:304,
from org/antlr/v4/analysis/LeftRecursiveRuleAnalyzer.java:469,
from org/antlr/v4/analysis/LeftRecursiveRuleAnalyzer.java:415,
from org/antlr/v4/analysis/LeftRecursiveRuleAltInfo.java:220,
from org/antlr/v4/analysis/LeftRecursionDetector.java:184,
from org/antlr/v4/analysis/AnalysisPipeline.java:173,
from <built-in>:127:
org/antlr/v4/codegen/DefaultOutputModelFactory.java:144:0: internal compiler
error: in operator[], at vec.h:714
0x609cc5 vec<int, va_heap, vl_embed>::operator[](unsigned int)
../../gcc/vec.h:714
0x609cc5 vec<int, va_heap, vl_ptr>::operator[](unsigned int)
../../gcc/vec.h:1180
0x609cc5 rewrite_reflection_indexes(void*)
../../gcc/java/jcf-parse.c:752
0x5d6cad make_class_data(tree_node*)
../../gcc/java/class.c:2180
0x5da106 finish_class()
../../gcc/java/class.c:2242
0x610c6e parse_class_file
../../gcc/java/jcf-parse.c:1661
0x611b38 parse_zip_file_entries
../../gcc/java/jcf-parse.c:2107
0x611b38 java_parse_file()
../../gcc/java/jcf-parse.c:1934
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
>From gcc-bugs-return-521157-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 06:57:31 2016
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From: "gcc@axel-naumann.de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70529] Unhelpful diagnostic for hex float literals, inconsistent parsing
Date: Tue, 05 Apr 2016 06:57:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70529
--- Comment #2 from Axel Naumann <gcc@axel-naumann.de> ---
Hi Jakub,
Thanks for your reply!
Let me try to explain better then.
This code
auto a = 0x123p2;
auto b = 0x123p-2;
compiles just fine until the recent hexfloat change. Now, the second line will
trigger an error message that does not mention C++1z or hexfloat support in
general. The first line continues to compile.
This is misleading. In my point of view, the fact that the diagnostic is
justified by the tokenization behavior is not relevant for user-level
diagnostics.
Take an arbitrary user, upgrading from GCC 5.x to 6.0. They will see an error
about a missing exponent - which is simply false (the code proves the
diagnostic wrong) and doesn't tell the developer what needs to be fixed (let
alone why).
You asked for it, so here is my wish list:
- for C++ < 1z, do not support hexfloats, neither with "unsigned" not negative
exponents. Or support both, as a GCC extention that's enabled by default - like
in the GCC 5 times.
- if you remove support for C++ < 1z, state that hexfloats are unsupported in
C++ < 1z.
Cheers, Axel.
NB: Even if I would buy into the argument that diagnostics are limited by the
tokens, I don't yet see why 'P' ends up being concated to the pp-number token
in C++ < 1z.
>From gcc-bugs-return-521158-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 07:13:52 2016
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From: "m.ostapenko at samsung dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/70541] unnoticed invalid dereference when using address sanitizer
Date: Tue, 05 Apr 2016 07:13:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70541
Maxim Ostapenko <m.ostapenko at samsung dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |m.ostapenko at samsung dot com
--- Comment #1 from Maxim Ostapenko <m.ostapenko at samsung dot com> ---
This bug also happens on current trunk. Consider slightly reduced testcase
(just part of Christof's one):
#include <stdlib.h>
#include <stdio.h>
struct Simple {
int value;
};
int f(struct Simple simple) {
return simple.value;
}
int main() {
int *pint = (int *) malloc(sizeof(int));
*pint = 24;
free(pint);
printf("%d\n", g(*pint));
return 0;
}
Corresponding gimple dump:
main ()
{
int D.3060;
int D.3061;
{
struct Simple * psimple;
psimple = malloc (4);
psimple->value = 42;
free (psimple);
D.3060 = f (*psimple); <===========================
printf ("%d\n", D.3060);
D.3061 = 0;
return D.3061;
}
D.3061 = 0;
return D.3061;
}
Here, GCC propagates *psimple directly to f() without creating temporary
variable and ASan is unable to check it because it doesn't sanitize gimple
calls arguments.
I think the easiest way to fix this would be adding arguments checks in
maybe_instrument_call, something like this:
@@ -2060,7 +2067,20 @@ maybe_instrument_call (gimple_stmt_iterator *iter)
return true;
}
- return false;
+ bool instrumented = false;
+ HOST_WIDE_INT args_num = gimple_call_num_args (stmt);
+ for (int i = 0; i < args_num; ++i)
+ {
+ if (is_arg_deref_p (TREE_CODE (gimple_call_arg (stmt, i))))
+ {
+ instrument_derefs (iter, gimple_call_arg (stmt, i),
+ gimple_location (stmt), false);
+ instrumented = true;
+ }
+ }
+ if (instrumented)
+ gsi_next (iter);
+ return instrumented;
>From gcc-bugs-return-521159-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 07:30:41 2016
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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/70541] unnoticed invalid dereference when using address sanitizer
Date: Tue, 05 Apr 2016 07:30:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-05
CC| |marxin at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
At -O0 indeed the dereferences in function argument list are not instrumented:
[ab.c:24:3] _7 = f ([ab.c:24:3] *psimple_3);
doesn't have corresponding ASAN_CHECK added.
At -O2, everything is reported, but there is another issue, we lose the
location
of the first read - before einline we have:
[ab.c:24:3] _7 = f ([ab.c:24:3] *psimple_3);
[ab.c:24:3] __builtin_printf ([ab.c:24:21] "%d\n", _7);
but after einline:
simple = [ab.c:24:3] *psimple_3;
[ab.c:8:16] _14 = [ab.c:8:16] simple.value;
_18 = _14;
[ab.c:24:3] _7 = _18;
[ab.c:24:3] __builtin_printf ([ab.c:24:21] "%d\n", _7);
as the simple = *psimple_3; statement has gimple_location UNKNOWN_LOCATION,
we actually end up reporting it at the spot of the second invalid memory access
(because it inherits the location from the previous statement, which is the
other __asan_report_store4 call). In this case, we could either also look at
EXPR_LOCATION of the MEM_REF if gimple_location is UNKNOWN_LOCATION, or we'd
need to look at the inliner and figure out what location we want for the
parameter read.
>From gcc-bugs-return-521160-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 07:35:32 2016
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From: "vsevolod.livinskij at frtk dot ru" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70542] New: [6 Regression] Wrong code with -O3 -mavx2.
Date: Tue, 05 Apr 2016 07:35:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70542
Bug ID: 70542
Summary: [6 Regression] Wrong code with -O3 -mavx2.
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: vsevolod.livinskij at frtk dot ru
Target Milestone: ---
Created attachment 38187
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38187&action=edit
Reproducer.
Test case produces incorrect result with -O3 -mavx2 (and -march=knl and
-march=skylake-avx512. Everything works fine with gcc version 4.9.4 20160401
(prerelease) (Revision=234686) and gcc version 5.3.1 20160401
(Revision=234686).
Output:
g++ -O2 -mavx2 repr.cpp; ./a.out
1540
> g++ -O3 -mavx2 repr.cpp; ./a.out
1204
GCC version:
> g++ -v
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/export/users/vlivinsk/gcc-trunk/bin/libexec/gcc/x86_64-pc-linux-gnu/6.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /export/users/vlivinsk/gcc-trunk/gcc/configure
--with-arch=corei7 --with-cpu=corei7 --enable-clocale=gnu --with-system-zlib
--enable-shared --with-demangler-in-ld --enable-cloog-backend=isl
--with-fpmath=sse --enable-checking=release --enable-languages=c,c++,lto
--with-gmp=/export/users/vlivinsk/gcc-trunk/gmp-6.1.0/bin
--with-mpfr=/export/users/vlivinsk/gcc-trunk/mpfr-3.1.3/bin
--with-mpc=/export/users/vlivinsk/gcc-trunk/mpc-1.0.3/bin
--prefix=/export/users/vlivinsk/gcc-trunk/bin
Thread model: posix
gcc version 6.0.0 20160404 (experimental) (Revision=234705)
Test:
#include <cstdlib>
int a[520];
short b[482];
short c[480];
int d[963];
short e[320];
int main() {
for (int i = 0; i < 520; ++i)
a[i] = -636544305;
for (int i = 0; i < 386; ++i)
b[i] = -31804;
for (long i = 1; i <= 112; ++i) {
c[i] = b[i] >> ((a[i] & 1587842570) - 1510214139);
if (a[i])
d[i] = i;
e[i] = 7 << ((2312631697 - b[i]) - 2312663500);
}
unsigned long long g = 0;
for (int i = 0; i < 111; ++i) {
g = e[i] + g;
}
if (g != 1540)
abort();
}
>From gcc-bugs-return-521161-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 07:39:00 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70542] [6 Regression] Wrong code with -O3 -mavx2.
Date: Tue, 05 Apr 2016 07:39:00 -0000
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Vsevolod Livinskiy <vsevolod.livinskij at frtk dot ru> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #38187|0 |1
is obsolete| |
--- Comment #1 from Vsevolod Livinskiy <vsevolod.livinskij at frtk dot ru> ---
Created attachment 38188
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38188&action=edit
Correct reproducer.
I've mixed up reproducers.
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug sanitizer/70541] unnoticed invalid dereference when using address sanitizer
Date: Tue, 05 Apr 2016 07:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70541
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Maxim Ostapenko from comment #1)
> @@ -2060,7 +2067,20 @@ maybe_instrument_call (gimple_stmt_iterator *iter)
> return true;
> }
If the function call returns a struct, then your patch wouldn't instrument it.
You need the bool instrumented = false; already above
if (gimple_store_p (stmt))
and set instrumented = true; there instead of gsi_next (iter); return true;
> - return false;
> + bool instrumented = false;
> + HOST_WIDE_INT args_num = gimple_call_num_args (stmt);
> + for (int i = 0; i < args_num; ++i)
> + {
> + if (is_arg_deref_p (TREE_CODE (gimple_call_arg (stmt, i))))
I'm not aware of any is_arg_deref_p predicate.
IMHO you should test:
if (!is_gimple_reg (gimple_call_arg (stmt, i)))
> + {
> + instrument_derefs (iter, gimple_call_arg (stmt, i),
> + gimple_location (stmt), false);
> + instrumented = true;
> + }
> + }
> + if (instrumented)
> + gsi_next (iter);
> + return instrumented;
As for the location_t thing, the fix would be to do in instrument_derefs
something like:
if (location == UNKNOWN_LOCATION)
location = EXPR_LOCATION (t);
after the early bail outs.
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Subject: [Bug tree-optimization/70499] internal compiler error: in make_ssa_name_fn, at tree-ssanames.c:266
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--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Apr 5 08:05:06 2016
New Revision: 234738
URL: https://gcc.gnu.org/viewcvs?rev=234738&root=gcc&view=rev
Log:
2016-04-05 Richard Biener <rguenther@suse.de>
PR middle-end/70499
* gimplify-me.c (gimple_regimplify_operands): Do not rewrite
non-register type temporaries into SSA.
* g++.dg/torture/pr70499.C: New testcase.
Added:
trunk/gcc/testsuite/g++.dg/torture/pr70499.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gimplify-me.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug target/70525] generating 'vpandn' without the mode suffix, gnu as fails to assemble (-mavx512bw)
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Apr 5 08:15:09 2016
New Revision: 234739
URL: https://gcc.gnu.org/viewcvs?rev=234739&root=gcc&view=rev
Log:
PR target/70525
* config/i386/sse.md (*andnot<mode>3): Simplify assertions.
Use vpandn<ssemodesuffix> for V16SI/V8DImode, vpandnq for
V32HI/V64QImode, don't use <mask_operand3_1>, fix up formatting.
(*andnot<mode>3_mask): Remove insn with VI12_AVX512VL iterator.
* gcc.target/i386/pr70525.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr70525.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/sse.md
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug target/70510] ICE: output_operand: invalid %-code with -mavx512bw -masm=intel when emitting vpbroatcast
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Kirill Yukhin <kyukhin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Last reconfirmed| |2016-04-05
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Subject: [Bug target/70510] ICE: output_operand: invalid %-code with -mavx512bw -masm=intel when emitting vpbroatcast
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--- Comment #3 from Kirill Yukhin <kyukhin at gcc dot gnu.org> ---
(In reply to Uroš Bizjak from comment #2)
> (In reply to Kirill Yukhin from comment #1)
> > will take a look.
>
> I have patch in testing:
>
Oh, great! Thanks!
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Subject: [Bug target/70525] generating 'vpandn' without the mode suffix, gnu as fails to assemble (-mavx512bw)
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Apr 5 08:23:46 2016
New Revision: 234740
URL: https://gcc.gnu.org/viewcvs?rev=234740&root=gcc&view=rev
Log:
PR target/70525
* config/i386/sse.md (*andnot<mode>3): Simplify assertions.
Use vpandn<ssemodesuffix> for V16SI/V8DImode, vpandnq for
V32HI/V64QImode, don't use <mask_operand3_1>, fix up formatting.
(*andnot<mode>3_mask): Remove insn with VI12_AVX512VL iterator.
* gcc.target/i386/pr70525.c: New test.
Added:
branches/gcc-5-branch/gcc/testsuite/gcc.target/i386/pr70525.c
Modified:
branches/gcc-5-branch/gcc/ChangeLog
branches/gcc-5-branch/gcc/config/i386/sse.md
branches/gcc-5-branch/gcc/testsuite/ChangeLog
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Subject: [Bug target/70542] [6 Regression] Wrong code with -O3 -mavx2.
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Looking into this.
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Subject: [Bug target/70525] generating 'vpandn' without the mode suffix, gnu as fails to assemble (-mavx512bw)
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed for 5.4+ (4.9 didn't support AVX512-BW at all).
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Subject: [Bug middle-end/70499] internal compiler error: in make_ssa_name_fn, at tree-ssanames.c:266
Date: Tue, 05 Apr 2016 08:34:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
Component|tree-optimization |middle-end
Known to work| |6.0
--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed on trunk sofar.
>From gcc-bugs-return-521171-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 08:36:48 2016
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Subject: [Bug target/70117] ppc long double isinf() is wrong?
Date: Tue, 05 Apr 2016 08:36:00 -0000
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--- Comment #15 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Alan Modra from comment #14)
> > if (fmt == &ibm_extended_double)
>
> No, there is mips_extended_format too.
As said above the best is to provide optabs for all three fns and optimal
implementations in the backend - that will disable the folding as well.
Emitting a comparison as we do now is stupid and inefficient given that
only the value of one of the double matters anyway.
>From gcc-bugs-return-521172-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 08:49:22 2016
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Subject: [Bug c++/70543] New: [6 Regression] wrong non-const error for enable_if and constexpr function
Date: Tue, 05 Apr 2016 08:49:00 -0000
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Bug ID: 70543
Summary: [6 Regression] wrong non-const error for enable_if and
constexpr function
Product: gcc
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The code below compiles fine on GCC 5 (with -std=c++11 or -std=c++14), while on
GCC 6 (r234732) it says:
error: size of array 'foo' is not an integral constant-expression
char foo[value];
#include <type_traits>
#include <tuple>
template <typename Tuple> struct X
{
template <unsigned int I = 0> static constexpr
typename std::enable_if<I == std::tuple_size<Tuple>::value,
unsigned int>::type
calc (void)
{
return 0;
}
template <unsigned int I = 0> static constexpr
typename std::enable_if<I < std::tuple_size<Tuple>::value,
unsigned int>::type
calc (void)
{
return sizeof (typename std::tuple_element<I, Tuple>::type)
+ calc<I + 1> ();
}
static constexpr unsigned int value = calc ();
char foo[value];
};
>From gcc-bugs-return-521173-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 08:56:50 2016
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Subject: [Bug c++/70543] [6 Regression] wrong non-const error for enable_if and constexpr function
Date: Tue, 05 Apr 2016 08:56:00 -0000
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--- Comment #1 from Oleg Endo <olegendo at gcc dot gnu.org> ---
A slightly reduced version:
#include <type_traits>
template <typename Tuple> struct X
{
template <unsigned int I = 0> static constexpr
typename std::enable_if< I == 5, unsigned int>::type
calc (void)
{
return 0;
}
template <unsigned int I = 0> static constexpr
typename std::enable_if< I != 5, unsigned int>::type
calc (void)
{
return 1 + calc<I + 1> ();
}
static constexpr unsigned int value = calc (); // <<<<<<<
char foo[value];
};
If the marked line is changed to
static constexpr unsigned int value = calc<0> ();
it compiles fine.
>From gcc-bugs-return-521174-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 08:59:19 2016
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Subject: [Bug c++/70544] New: Overload resolution with explicitly specified template arguments
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Bug ID: 70544
Summary: Overload resolution with explicitly specified template
arguments
Product: gcc
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When compiling this program:
template <class... Args>
void F(Args&&...);
template <class T, class... Args>
int F(Args&&...);
int main() {
int{F<int>(0)};
}
Expected behavior: compile error (call to `F` is ambiguous).
Actual behaviour: compiles successfully.
Comment from Richard Smith: "I suspect this might be fallout from GCC's
workaround for core issue 1395 (after substituting explicitly-specified
template arguments, the first 'F' has one pack element deduced and the second
'F' has none, so I suspect the second may look more specialized under GCC's
approach to 1395 but not Clang's)."
Note that the following program gets rejected by GCC (as expected):
template <class T>
void F(T);
template <class T, class U>
void F(U);
int main() {
F<int>(0);
}
>From gcc-bugs-return-521175-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 08:59:54 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70542] [6 Regression] Wrong code with -O3 -mavx2.
Date: Tue, 05 Apr 2016 08:59:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-05
Ever confirmed|0 |1
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r233068.
Slightly cleaned up testcase:
int a[113], d[113];
short b[113], c[113], e[113];
int
main ()
{
int i;
long j;
unsigned long long g = 0;
for (i = 0; i < 113; ++i)
{
a[i] = -636544305;
b[i] = -31804;
}
for (j = 1; j <= 112; ++j)
{
c[j] = b[j] >> ((a[j] & 1587842570) - 1510214139);
if (a[j])
d[j] = j;
e[j] = 7 << ((2312631697 - b[j]) - 2312663500);
}
for (i = 0; i < 111; ++i)
g = e[i] + g;
if (g != 1540)
__builtin_abort ();
return 0;
}
>From gcc-bugs-return-521176-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 09:04:22 2016
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From: "vries at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/70545] New: [openacc] gfortran.dg/goacc/kernels-loop-n.f95 not parallelized
Date: Tue, 05 Apr 2016 09:04:00 -0000
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Bug ID: 70545
Summary: [openacc] gfortran.dg/goacc/kernels-loop-n.f95 not
parallelized
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: enhancement
Priority: P3
Component: tree-optimization
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Consider this testcase (gfortran.dg/goacc/kernels-loop-n.f95):
...
module test
contains
subroutine foo(n)
implicit none
integer :: n
integer, dimension (0:n-1) :: a, b, c
integer :: i, ii
do i = 0, n - 1
a(i) = i * 2
end do
do i = 0, n -1
b(i) = i * 4
end do
!$acc kernels copyin (a(0:n-1), b(0:n-1)) copyout (c(0:n-1))
do ii = 0, n - 1
c(ii) = a(ii) + b(ii)
end do
!$acc end kernels
do i = 0, n - 1
if (c(i) .ne. a(i) + b(i)) call abort
end do
end subroutine foo
end module test
...
Note that the n parameter of foo translates to a restrict reference:
...
foo (integer(kind=4) & restrict n)
...
Parallelization fails because these statement cannot be disambiguated:
...
Stmt *_9 = 0;
conflicts with entry/exit stmt: _7 = *_6;
entry/exit not ok: FAILED
...
Looking at the first basic block, we can see the stmts:
...
<bb 2>:
# VUSE <.MEM_3(D)>
_5 = *.omp_data_i_4(D).n;
# VUSE <.MEM_3(D)>
_6 = *_5;
# VUSE <.MEM_3(D)>
_7 = *_6;
_8 = _7 + -1;
# VUSE <.MEM_3(D)>
_9 = *.omp_data_i_4(D).ii;
# .MEM_10 = VDEF <.MEM_3(D)>
*_9 = 0;
if (_8 >= 0)
goto <bb 4>;
else
goto <bb 3>;
...
The '*_9 = 0' is a store to the iteration counter ii, and '_7 = *_6' is a load
of 'n'.
AFAIU, They are not disambiguated because fipa-pta ignores restrict (see
PR68787 - fipa-pta to interpret restrict).
The store has the expected points-to information in pta:
...
_9 = { D.3639 }
...
But the load does not translate back to the load from restrict reference:
...
_7 = { ESCAPED NONLOCAL }
...
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Subject: [Bug tree-optimization/68787] fipa-pta to interpret restrict
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68787
--- Comment #3 from vries at gcc dot gnu.org ---
(In reply to vries from comment #2)
> This is in particular problematic for fortran and fopenmp/fopenacc, where
> the non-aliasing of parameters arrays in fortran is implemented by annotated
> those parameters with restrict in the fortran frontend.
See f.i. PR70545 - '[openacc] gfortran.dg/goacc/kernels-loop-n.f95 not
parallelized'
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Subject: [Bug c++/70543] [6 Regression] wrong non-const error for enable_if and constexpr function
Date: Tue, 05 Apr 2016 09:11:00 -0000
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--- Comment #2 from Oleg Endo <olegendo at gcc dot gnu.org> ---
(In reply to Oleg Endo from comment #1)
>
> If the marked line is changed to
>
> static constexpr unsigned int value = calc<0> ();
>
> it compiles fine.
However, if doing that "trick" in the bigger production code, there is some new
error:
c++/6.0.0/type_traits:868:48: error: constructor required before non-static
data member for '...' has been parsed
template<typename _Tp, typename = decltype(_Tp())>
^~~~
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Subject: [Bug libstdc++/66693] [C++17] std::tuple_size fails with const std::array
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This was fixed (thanks, Ville).
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Subject: [Bug tree-optimization/68787] fipa-pta to interpret restrict
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
One possibility would be to re-run non-IPA PTA just to compute restrict info,
that is, instead of bailing out when cfun->gimple_df->ipa_pta just not update
SSA pointer-info but still call compute_dependence_clique. Requires
splitting of compute_points_to_sets into the actual compute and SSA
pointer-info
update parts.
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Subject: [Bug c++/70543] [6 Regression] wrong non-const error for enable_if and constexpr function
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Subject: [Bug c++/70540] [4.9/5/6 Regression] ICE on invalid code on x86_64-linux-gnu in cxx_incomplete_type_diagnostic, at cp/typeck2.c:569
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Subject: [Bug c++/70536] g++ doesn't emit DW_AT_name for DW_TAG_GNU_formal_parameter_pack
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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> ---
Please post patches to gcc-patches@gcc.gnu.org and make sure they pass
bootstrap & regtest
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Subject: [Bug sanitizer/70541] unnoticed invalid dereference when using address sanitizer
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--- Comment #4 from Maxim Ostapenko <m.ostapenko at samsung dot com> ---
(In reply to Jakub Jelinek from comment #3)
> (In reply to Maxim Ostapenko from comment #1)
> > @@ -2060,7 +2067,20 @@ maybe_instrument_call (gimple_stmt_iterator *iter)
> > return true;
> > }
>
> If the function call returns a struct, then your patch wouldn't instrument
> it.
> You need the bool instrumented = false; already above
> if (gimple_store_p (stmt))
> and set instrumented = true; there instead of gsi_next (iter); return true;
>
> > - return false;
> > + bool instrumented = false;
> > + HOST_WIDE_INT args_num = gimple_call_num_args (stmt);
> > + for (int i = 0; i < args_num; ++i)
> > + {
> > + if (is_arg_deref_p (TREE_CODE (gimple_call_arg (stmt, i))))
>
> I'm not aware of any is_arg_deref_p predicate.
> IMHO you should test:
> if (!is_gimple_reg (gimple_call_arg (stmt, i)))
>
> > + {
> > + instrument_derefs (iter, gimple_call_arg (stmt, i),
> > + gimple_location (stmt), false);
> > + instrumented = true;
> > + }
> > + }
> > + if (instrumented)
> > + gsi_next (iter);
> > + return instrumented;
>
Thanks, looks better now?
diff --git a/gcc/asan.c b/gcc/asan.c
index 47bfdcd..c51e629 100644
--- a/gcc/asan.c
+++ b/gcc/asan.c
@@ -1766,6 +1766,8 @@ instrument_derefs (gimple_stmt_iterator *iter, tree t,
tree type, base;
HOST_WIDE_INT size_in_bytes;
+ if (location == UNKNOWN_LOCATION)
+ location = EXPR_LOCATION (t);
type = TREE_TYPE (t);
switch (TREE_CODE (t))
@@ -2049,6 +2051,7 @@ maybe_instrument_call (gimple_stmt_iterator *iter)
gsi_insert_before (iter, g, GSI_SAME_STMT);
}
+ bool instrumented = false;
if (gimple_store_p (stmt))
{
tree ref_expr = gimple_call_lhs (stmt);
@@ -2056,11 +2059,22 @@ maybe_instrument_call (gimple_stmt_iterator *iter)
gimple_location (stmt),
/*is_store=*/true);
- gsi_next (iter);
- return true;
+ instrumented = true;
}
- return false;
+ HOST_WIDE_INT args_num = gimple_call_num_args (stmt);
+ for (int i = 0; i < args_num; ++i)
+ {
+ if (!is_gimple_reg (gimple_call_arg (stmt, i)))
+ {
+ instrument_derefs (iter, gimple_call_arg (stmt, i),
+ gimple_location (stmt), false);
+ instrumented = true;
+ }
+ }
+ if (instrumented)
+ gsi_next (iter);
+ return instrumented;
}
> As for the location_t thing, the fix would be to do in instrument_derefs
> something like:
> if (location == UNKNOWN_LOCATION)
> location = EXPR_LOCATION (t);
> after the early bail outs.
Hm, even with if (location == UNKNOWN_LOCATION) location = EXPR_LOCATION (t); I
don't see reasonable line in -O2 case:
1 #include <stdio.h>
2 #include <stdlib.h>
3
4 struct Simple {
5 int value;
6 };
7
8 int f(struct Simple simple) {
9 return simple.value;
10 }
11
12 int g(int value) {
13 return value;
14 }
15
16 int main() {
17 struct Simple *psimple = (struct Simple *) malloc(sizeof(struct Simple));
18 psimple->value = 42;
19 free(psimple);
20 printf("%d\n", f(*psimple));
21 return 0;
22 }
$ ./a.out
==29898==ERROR: AddressSanitizer: heap-use-after-free on address 0x60200000eff0
at pc 0x0000004055a6 bp 0x7ffc6b5632c0 sp 0x7ffc6b5632a0
READ of size 4 at 0x60200000eff0 thread T0
#0 0x4055a5 in main /tmp/test2.c:22
#1 0x7f8e6df32ec4 in __libc_start_main
(/lib/x86_64-linux-gnu/libc.so.6+0x21ec4)
#2 0x4055f9 (/tmp/a.out+0x4055f9)
$ cat test2.c.126t.asan1
main ()
{
int simple$value;
struct Simple * psimple;
<bb 2>:
[test2.c:17:18] psimple_3 = malloc (4);
[test2.c:17:18] # DEBUG psimple => psimple_3
[test2.c:19:3] free (psimple_3);
ASAN_CHECK (6, psimple_3, 4, 8);
simple$value_6 = MEM[(struct Simple *)psimple_3];
# DEBUG simple$value => simple$value_6
[test2.c:20:3] printf ([test2.c:20:10] "%d\n", simple$value_6);
return 0;
}
Perhaps we indeed should look at the inliner.
>From gcc-bugs-return-521186-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 09:21:13 2016
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Subject: [Bug rtl-optimization/70526] GCC 6 miscompiles Firefox JIT compiler
Date: Tue, 05 Apr 2016 09:21:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |alias, wrong-code
Status|RESOLVED |ASSIGNED
Last reconfirmed| |2016-04-05
Resolution|INVALID |---
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Let me have a look - the source looks good to me (yeah, maybe some placement
new is missing, but as that is a no-op it doesn't matter to the middle-end).
>From gcc-bugs-return-521187-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 09:35:25 2016
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Subject: [Bug tree-optimization/70546] New: ifconvert if(cond) ++count; to count += cond;
Date: Tue, 05 Apr 2016 09:35:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70546
Bug ID: 70546
Summary: ifconvert if(cond) ++count; to count += cond;
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Keywords: missed-optimization
Severity: enhancement
Priority: P3
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Target: x86_64-*-*
In the example from http://stackoverflow.com/q/36414959/1918193 we fail to
vectorize f0 (using g++ -O3) because of the condition in the loop. However, if
I manually change the condition as in the #else case, the vectorizer is happy
and we get a very nice performance boost. Could ifconvert (or some other phi
optimization pass) handle this transformation? n is a local variable, so we
shouldn't even need -ftree-loop-if-convert-stores. At -O1, it is also a clear
win with the random distribution, but it becomes a slight loss if the vector v
is sorted in increasing order and a big loss for the decreasing order, so I
don't know for sure under which condition this should be done.
#include <algorithm>
#include <chrono>
#include <random>
#include <iomanip>
#include <iostream>
#include <vector>
using namespace std;
using namespace std::chrono;
vector<int> v(1'000'000);
int f0()
{
int n = 0;
for (int i = 1; i < v.size()-1; ++i) {
int a = v[i-1];
int b = v[i];
int c = v[i+1];
#ifndef IMPROVED
if (a < b && b < c) ++n;
#else
n += (a < b && b < c);
#endif
}
return n;
}
int f1()
{
int n = 0;
for (int i = 1; i < v.size()-1; ++i)
if (v[i-1] < v[i] && v[i] < v[i+1])
++n;
return n;
}
int main()
{
auto benchmark = [](int (*f)()) {
const int N = 100;
volatile long long result = 0;
vector<long long> timings(N);
for (int i = 0; i < N; ++i) {
auto t0 = high_resolution_clock::now();
result += f();
auto t1 = high_resolution_clock::now();
timings[i] = duration_cast<nanoseconds>(t1-t0).count();
}
sort(timings.begin(), timings.end());
cout << fixed << setprecision(6) << timings.front()/1'000'000.0 << "ms
min\n";
cout << timings[timings.size()/2]/1'000'000.0 << "ms median\n" << "Result:
" << result/N << "\n\n";
};
mt19937 generator (31415); // deterministic seed
uniform_int_distribution<> distribution(0, 1023);
for (auto& e: v)
e = distribution(generator);
benchmark(f0);
benchmark(f1);
cout << "\ndone\n";
return 0;
}
>From gcc-bugs-return-521188-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 09:45:04 2016
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Subject: [Bug fortran/70235] [4.9/5 Regression] Incorrect output with PF format
Date: Tue, 05 Apr 2016 09:45:00 -0000
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--- Comment #27 from dominiq at gcc dot gnu.org ---
Author: dominiq
Date: Tue Apr 5 09:44:17 2016
New Revision: 234741
URL: https://gcc.gnu.org/viewcvs?rev=234741&root=gcc&view=rev
Log:
2016-04-05 Jerry DeLisle <jvdelisle@gcc.gnu.org>
Dominique d'Humieres <dominiq@lps.ens.fr>
PR libgfortran/70235
* io/write_float.def: Fix PF format for negative values of the scale
factor.
2016-04-05 Dominique d'Humieres <dominiq@lps.ens.fr>
Jerry DeLisle <jvdelisle@gcc.gnu.org>
* gfortran.dg/fmt_pf.f90: New test.
Added:
branches/gcc-5-branch/gcc/testsuite/gfortran.dg/fmt_pf.f90
Modified:
branches/gcc-5-branch/gcc/testsuite/ChangeLog
branches/gcc-5-branch/libgfortran/ChangeLog
branches/gcc-5-branch/libgfortran/io/write_float.def
>From gcc-bugs-return-521189-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 09:53:38 2016
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Subject: [Bug bootstrap/60244] GCC-trunk rev.207809, Segmentation fault when executing ".../xgcc -dumpspecs"
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--- Comment #11 from VladimÃr ÄŒunát <vcunat at gmail dot com> ---
OK, I'm abandoning this problem, regardless of which package actually causes
the problem. I can't see how to progress and I've got some workarounds for my
case: either downgrading to binutils-2.25.1 or upgrading the whole toolchain
(including gcc).
>From gcc-bugs-return-521190-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 09:58:52 2016
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Subject: [Bug c++/70529] Unhelpful diagnostic for hex float literals, inconsistent parsing
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |manu at gcc dot gnu.org
--- Comment #3 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #1)
> So, either use the GNU extension modes (-std=gnu++11, -std=gnu++14), or wait
> for -std=c++17.
According to the manual, if an extension is not incompatible with the base
standard, it should not be disabled:
"When a base standard is specified, the compiler accepts all programs following
that standard plus those using GNU extensions that do not contradict it."
If one wants to distinguish between exponents with sign and without, it would
be better if libcpp parses the hext-float while keeping track of the location_t
of the sign (or UNKNOWN_LOCATION if not present). Then give a pedwarn
(conditional on -Wpedantic) if location_t != UNKNOWN_LOCATION for the relevant
standards. Having the location of the sign also will allow gcc to give a more
precise warning:
warning: signed exponent in hexadecimal float is a GNU extension [-Wpedantic]
auto d = 0x123p-2;
^
>From gcc-bugs-return-521191-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 10:02:02 2016
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Subject: [Bug fortran/70235] [4.9/5 Regression] Incorrect output with PF format
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--- Comment #28 from dominiq at gcc dot gnu.org ---
Author: dominiq
Date: Tue Apr 5 10:01:17 2016
New Revision: 234742
URL: https://gcc.gnu.org/viewcvs?rev=234742&root=gcc&view=rev
Log:
2016-04-05 Jerry DeLisle <jvdelisle@gcc.gnu.org>
Dominique d'Humieres <dominiq@lps.ens.fr>
PR libgfortran/70235
* io/write_float.def: Fix PF format for negative values of the scale
factor.
2016-04-05 Dominique d'Humieres <dominiq@lps.ens.fr>
Jerry DeLisle <jvdelisle@gcc.gnu.org>
* gfortran.dg/fmt_pf.f90: New test.
Added:
branches/gcc-4_9-branch/gcc/testsuite/gfortran.dg/fmt_pf.f90
Modified:
branches/gcc-4_9-branch/gcc/testsuite/ChangeLog
branches/gcc-4_9-branch/libgfortran/ChangeLog
branches/gcc-4_9-branch/libgfortran/io/write_float.def
>From gcc-bugs-return-521192-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 10:08:23 2016
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Subject: [Bug target/70542] [6 Regression] Wrong code with -O3 -mavx2.
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
This goes wrong during the REE pass.
>From gcc-bugs-return-521193-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 10:08:55 2016
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From: "glisse at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/70547] New: Optimize multiplication of booleans to bit_and
Date: Tue, 05 Apr 2016 10:08:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70547
Bug ID: 70547
Summary: Optimize multiplication of booleans to bit_and
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Keywords: missed-optimization
Severity: enhancement
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: glisse at gcc dot gnu.org
Target Milestone: ---
int f(int a,int b,int c,int d){
return (a<b)*(c<d);
}
produces
_3 = a_1(D) < b_2(D);
_4 = (int) _3;
_7 = c_5(D) < d_6(D);
_8 = (int) _7;
_9 = _4 * _8;
return _9;
Since we know that _4 and _8 are in the range [0, 1], we could replace the
multiplication with a cheaper AND.
>From gcc-bugs-return-521194-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 10:11:26 2016
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From: "vries at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/68787] fipa-pta to interpret restrict
Date: Tue, 05 Apr 2016 10:11:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68787
--- Comment #5 from vries at gcc dot gnu.org ---
Created attachment 38189
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38189&action=edit
patch to recompute restrict info after ipa-pta
(In reply to Richard Biener from comment #4)
> One possibility would be to re-run non-IPA PTA just to compute restrict info,
> that is, instead of bailing out when cfun->gimple_df->ipa_pta just not update
> SSA pointer-info but still call compute_dependence_clique. Requires
> splitting of compute_points_to_sets into the actual compute and SSA
> pointer-info
> update parts.
That sound similar to what I've tried here:
https://gcc.gnu.org/ml/gcc-patches/2015-12/msg01257.html .
Attaching a more minimal version.
But it doesn't affect the testcase, and I'm not sure how it could (perhaps it
will affect another test-case, I'm not sure).
For the listed testcase, after ipa-pta we have:
...
__attribute__((noclone, noinline))
bar (intD.6 * aD.1755, intD.6 * bD.1756)
{
# PT = nonlocal
intD.6 * a_2(D) = aD.1755;
# PT = nonlocal
intD.6 * b_4(D) = bD.1756;
intD.6 _6;
intD.6 _7;
...
There's nothing to take advantage of by trying to reannotate with restrict.
>From gcc-bugs-return-521195-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 10:13:38 2016
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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/70526] GCC 6 miscompiles Firefox JIT compiler
Date: Tue, 05 Apr 2016 10:13:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70526
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Looks like a SRA bug to me replacing
D.2447 = MEM[(const struct Register &)&D.2394];
D.2404 = D.2447;
_5 = D.2404.reg_;
with
SR.8_3 = MEM[(struct TypedOrValueRegister *)&D.2394];
SR.7_4 = SR.8_3;
_5 = SR.7_4;
notice how it changes the alias type of the access of D.2394.
Will attempt to totally scalarize D.2447 (UID: 2447):
...
Created a replacement for D.2447 offset: 0, size: 32: SR.8
Access trees for D.2447 (UID: 2447):
access { base = (2447)'D.2447', offset = 0, size = 32, expr = D.2447.reg_, type
= uint32_t, non_addressable = 0, reverse = 0, grp_read = 1, grp_write = 1,
grp_assignment_read = 1, grp_assignment_write = 1, grp_scalar_read = 1,
grp_scalar_write = 0, grp_total_scalarization = 1, grp_hint = 1, grp_covered =
1, grp_unscalarizable_region = 0, grp_unscalarized_data = 0, grp_partial_lhs =
0, grp_to_be_replaced = 1, grp_to_be_debug_replaced = 0, grp_maybe_modified =
0, grp_not_necessarilly_dereferenced = 0
notice the bogus ->expr, possibly created from the D.2404 accesses.
Created a replacement for D.2404 offset: 0, size: 32: SR.7
Access trees for D.2404 (UID: 2404):
access { base = (2404)'D.2404', offset = 0, size = 32, expr = D.2404.reg_, type
= uint32_t, non_addressable = 0, reverse = 0, grp_read = 1, grp_write = 1,
grp_assignment_read = 1, grp_assignment_write = 1, grp_scalar_read = 1,
grp_scalar_write = 0, grp_total_scalarization = 0, grp_hint = 0, grp_covered =
1, grp_unscalarizable_region = 0, grp_unscalarized_data = 0, grp_partial_lhs =
0, grp_to_be_replaced = 1, grp_to_be_debug_replaced = 0, grp_maybe_modified =
0, grp_not_necessarilly_dereferenced = 0
Indeed the issue seems to be a simple typo and the following fixes it:
Index: gcc/tree-sra.c
===================================================================
--- gcc/tree-sra.c (revision 234736)
+++ gcc/tree-sra.c (working copy)
@@ -1673,7 +1673,7 @@ build_ref_for_offset (location_t loc, tr
}
else
{
- off = build_int_cst (reference_alias_ptr_type (base),
+ off = build_int_cst (reference_alias_ptr_type (prev_base),
base_offset + offset / BITS_PER_UNIT);
base = build_fold_addr_expr (unshare_expr (base));
}
>From gcc-bugs-return-521196-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 10:16:55 2016
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Subject: [Bug fortran/70235] [4.9/5 Regression] Incorrect output with PF format
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |FIXED
--- Comment #29 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Closing as FIXED.
>From gcc-bugs-return-521197-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 10:17:28 2016
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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/70547] Optimize multiplication of booleans to bit_and
Date: Tue, 05 Apr 2016 10:17:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70547
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-05
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
>From gcc-bugs-return-521198-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 10:25:01 2016
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/70474] [4.9 Regression] Several hundred asan failures with 4.9.4 on x86_64-apple-darwin15
Date: Tue, 05 Apr 2016 10:25:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70474
--- Comment #4 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
As reported in bugzilla the patch fixes the issue. What is your plan about it?
TIA
Dominique
> Le 31 mars 2016 à 11:26, m.ostapenko at samsung dot com <gcc-bugzilla@gcc.gnu.org> a écrit :
>
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70474
>
> --- Comment #1 from Maxim Ostapenko <m.ostapenko at samsung dot com> ---
> Created attachment 38143
> --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38143&action=edit
> Proposed patch.
>
> Does this patch fix the problem?
>
> --
> You are receiving this mail because:
> You reported the bug.
>From gcc-bugs-return-521199-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 10:31:38 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/70546] ifconvert if(cond) ++count; to count += cond; fails because of mergephi and failed loop header copying
Date: Tue, 05 Apr 2016 10:31:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70546
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-05
Summary|ifconvert if(cond) ++count; |ifconvert if(cond) ++count;
|to count += cond; |to count += cond; fails
| |because of mergephi and
| |failed loop header copying
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
I think the issue is that the increment of n is in the latch block and that
we didn't properly copy the loop header:
;; Function int f0() (_Z2f0v, funcdef_no=3715, decl_uid=71164, cgraph_uid=957,
symbol_order=963)
fix_loop_structure: fixing up loops for function
Disambiguating loop 1 with multiple latches
Merged latch edges of loop 1
It is mergephi that merges the header and latch PHIs:
<bb 3>:
# n_1 = PHI <0(2), n_2(6)>
# i_3 = PHI <1(2), _22(6)>
_8 = (long unsigned int) i_3;
_33 = MEM[(int * *)&v];
...
if (_29 != 0)
goto <bb 5>;
else
goto <bb 6>;
<bb 5>:
n_30 = n_1 + 1;
<bb 6>:
# n_2 = PHI <n_1(4), n_30(5)>
goto <bb 3>;
to
<bb 3>:
# n_1 = PHI <0(2), n_30(5), n_1(4)>
# i_3 = PHI <1(2), _22(5), _22(4)>
_8 = (long unsigned int) i_3;
...
if (_29 != 0)
goto <bb 5>;
else
goto <bb 3>;
<bb 5>:
n_30 = n_1 + 1;
goto <bb 3>;
creating multiple latches. We still fail to copy loop headers properly
for -fdisable-tree-mergephi[123] though.
So the issues are elsewhere and tree ifcvt should handle this fine
already.
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Subject: [Bug fortran/52788] -fbounds-check fails for 2-rank allocatable arrays when reading
Date: Tue, 05 Apr 2016 10:33:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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--- Comment #4 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Duplicate of pr30802?
No objection, thus marked as duplicate.
*** This bug has been marked as a duplicate of bug 30802 ***
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Subject: [Bug fortran/30802] out of bounds error array I/O not picked up with -fbounds-check
Date: Tue, 05 Apr 2016 10:33:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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CC| |Edouard.Canot at irisa dot fr
--- Comment #7 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
*** Bug 52788 has been marked as a duplicate of this bug. ***
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Subject: [Bug fortran/27766] [meta-bug] -fbounds-check related bugs
Date: Tue, 05 Apr 2016 10:33:00 -0000
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Bug 27766 depends on bug 52788, which changed state.
Bug 52788 Summary: -fbounds-check fails for 2-rank allocatable arrays when reading
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52788
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>From gcc-bugs-return-521203-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 10:38:22 2016
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Subject: [Bug libfortran/69788] FAIL: gfortran.dg/derived_constructor_comps_6.f90 -O0 execution test
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>From gcc-bugs-return-521205-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 10:43:25 2016
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Subject: [Bug tree-optimization/68787] fipa-pta to interpret restrict
Date: Tue, 05 Apr 2016 10:43:00 -0000
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--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Oh, and with LTO you _should_ see all pointed-to objects and thus restrict
should be no longer necessary... (well, in theory)
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Subject: [Bug tree-optimization/68787] fipa-pta to interpret restrict
Date: Tue, 05 Apr 2016 10:43:00 -0000
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--- Comment #6 from rguenther at suse dot de <rguenther at suse dot de> ---
On Tue, 5 Apr 2016, vries at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68787
>
> --- Comment #5 from vries at gcc dot gnu.org ---
> Created attachment 38189
> --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38189&action=edit
> patch to recompute restrict info after ipa-pta
>
> (In reply to Richard Biener from comment #4)
> > One possibility would be to re-run non-IPA PTA just to compute restrict info,
> > that is, instead of bailing out when cfun->gimple_df->ipa_pta just not update
> > SSA pointer-info but still call compute_dependence_clique. Requires
> > splitting of compute_points_to_sets into the actual compute and SSA
> > pointer-info
> > update parts.
>
> That sound similar to what I've tried here:
> https://gcc.gnu.org/ml/gcc-patches/2015-12/msg01257.html .
>
> Attaching a more minimal version.
>
> But it doesn't affect the testcase, and I'm not sure how it could (perhaps it
> will affect another test-case, I'm not sure).
>
> For the listed testcase, after ipa-pta we have:
> ...
> __attribute__((noclone, noinline))
> bar (intD.6 * aD.1755, intD.6 * bD.1756)
> {
> # PT = nonlocal
> intD.6 * a_2(D) = aD.1755;
> # PT = nonlocal
> intD.6 * b_4(D) = bD.1756;
> intD.6 _6;
> intD.6 _7;
> ...
>
> There's nothing to take advantage of by trying to reannotate with restrict.
True. If there's a IPA effect of restrict to be exposed it won't help.
Note that the issue with IPA PTA is that if you enable restrict tags
to be used you can end up with
static foo (int *p) { ... }
bar (int * __restrict p) { ... foo (p); /* p is restrict */ ... }
baz (int * p) { ... foo (p); /* p is not restrict */ ... }
and this breaks down having p in foo be { NONLOCAL, restrict-tag }
and the current handling making p in foo restrict (well, the current
handling can't assign cliques to functions in IPA mode, but you
see one of several issues). Similarly recursion of bar will not
properly handle restrict I believe.
The current restrict tag handling is quite (too) conservative so
it might work in its current state only handling the
must-point-to-restrict (or NULL) case. You can always try ...
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Subject: [Bug sanitizer/70474] [4.9 Regression] Several hundred asan failures with 4.9.4 on x86_64-apple-darwin15
Date: Tue, 05 Apr 2016 10:46:00 -0000
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--- Comment #5 from Maxim Ostapenko <m.ostapenko at samsung dot com> ---
Eh, just forgot about this one, sorry. Will post the patch shortly.
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Subject: [Bug rtl-optimization/70542] [6 Regression] Wrong code with -O3 -mavx2.
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Subject: [Bug fortran/68226] [4.9/5/6 Regression] [OOP] ICE on assignment of pointer-valued function to allocatable
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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>From gcc-bugs-return-521209-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 11:10:25 2016
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Subject: [Bug tree-optimization/70341] [4.9/5/6 Regression] Code size increase due to earlier switch case lowering.
Date: Tue, 05 Apr 2016 11:10:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Priority|P3 |P2
Host|linux |
Target Milestone|--- |4.9.4
>From gcc-bugs-return-521210-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 11:10:55 2016
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Subject: [Bug c/70436] [4.9/5/6 Regression] -Wparentheses missing ambiguous else warning
Date: Tue, 05 Apr 2016 11:10:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Priority|P3 |P2
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>From gcc-bugs-return-521211-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 11:21:53 2016
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/65438] Unnecessary ptr check
Date: Tue, 05 Apr 2016 11:21:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
Status|WAITING |RESOLVED
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--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
No feedback after more than a year. Closing as INVALID.
>From gcc-bugs-return-521212-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 11:32:15 2016
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From: "ville at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/70437] [6 Regression] Instantiation loop with pair and is_constructible
Date: Tue, 05 Apr 2016 11:32:00 -0000
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--- Comment #3 from ville at gcc dot gnu.org ---
Author: ville
Date: Tue Apr 5 11:31:30 2016
New Revision: 234743
URL: https://gcc.gnu.org/viewcvs?rev=234743&root=gcc&view=rev
Log:
PR libstdc++/70437
* include/bits/stl_pair.h (_ConstructiblePair,
_ImplicitlyConvertiblePair, _MoveConstructiblePair,
_ImplicitlyMoveConvertiblePair): Add shortcut conditions
for same-type cases.
* testsuite/20_util/pair/70437.cc: New.
Added:
trunk/libstdc++-v3/testsuite/20_util/pair/70437.cc
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/bits/stl_pair.h
>From gcc-bugs-return-521213-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 11:48:18 2016
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/70526] [6 Regression] GCC 6 miscompiles Firefox JIT compiler
Date: Tue, 05 Apr 2016 11:48:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P1
Component|rtl-optimization |tree-optimization
Target Milestone|--- |6.0
Summary|GCC 6 miscompiles Firefox |[6 Regression] GCC 6
|JIT compiler |miscompiles Firefox JIT
| |compiler
--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
The issue is actually older so I'll backport this with my next batch(es).
>From gcc-bugs-return-521214-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 11:53:22 2016
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From: "chefmax at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug sanitizer/70474] [4.9 Regression] Several hundred asan failures with 4.9.4 on x86_64-apple-darwin15
Date: Tue, 05 Apr 2016 11:53:00 -0000
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--- Comment #6 from chefmax at gcc dot gnu.org ---
Author: chefmax
Date: Tue Apr 5 11:52:34 2016
New Revision: 234744
URL: https://gcc.gnu.org/viewcvs?rev=234744&root=gcc&view=rev
Log:
Cherry-pick r224315,221379 and r241487 from upstream.
libsanitizer/
PR sanitizer/70474
* asan/asan_mac.cc (GetMacosVersionInternal): Cherry pick
upstream r241487, 221379 and r224315.
(void MaybeReexec): Cherry pick upstream r241487.
* asan/asan_mac.h (enum MacosVersion): Cherry pick upstream r224315.
Modified:
branches/gcc-4_9-branch/libsanitizer/ChangeLog
branches/gcc-4_9-branch/libsanitizer/asan/asan_mac.cc
branches/gcc-4_9-branch/libsanitizer/asan/asan_mac.h
>From gcc-bugs-return-521215-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 12:09:44 2016
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/70437] [6 Regression] Instantiation loop with pair and is_constructible
Date: Tue, 05 Apr 2016 12:09:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-521216-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 12:35:11 2016
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Subject: [Bug rtl-optimization/70542] [6 Regression] Wrong code with -O3 -mavx2.
Date: Tue, 05 Apr 2016 12:35:00 -0000
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 38190
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38190&action=edit
gcc6-pr70542.patch
Untested fix.
>From gcc-bugs-return-521217-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 12:38:42 2016
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug sanitizer/70474] [4.9 Regression] Several hundred asan failures with 4.9.4 on x86_64-apple-darwin15
Date: Tue, 05 Apr 2016 12:38:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-521218-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 12:55:33 2016
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Subject: [Bug rtl-optimization/70542] [6 Regression] Wrong code with -O3 -mavx2.
Date: Tue, 05 Apr 2016 12:55:00 -0000
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 38191
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38191&action=edit
gcc6-pr70542.patch
Perhaps better fix. Looking at PR64286, the comment is right, if we change
somehow the definition for VECTOR_MODE_P, we need to make sure all uses are
modified, or none. But there is tons of reasons why some of them could fail,
e.g. for the copy_needed case there is lots of tests that can fail, but even
for the !copy_needed case it could fail to get recognized etc., and we are
unable to handle all the uses as a single transaction.
>From gcc-bugs-return-521219-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 13:07:11 2016
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Subject: [Bug testsuite/70520] Incorrect child stack alignment in c-c++-common/asan/clone-test-1.c
Date: Tue, 05 Apr 2016 13:07:00 -0000
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H.J. Lu <hjl.tools at gmail dot com> changed:
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----------------------------------------------------------------------------
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Last reconfirmed| |2016-04-05
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--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> ---
It has been fixed upstream by
commit 5e263ef18766b562a05aa6736d6c7ea3c8af3b4e
Author: Reid Kleckner <rnk@google.com>
Date: Mon Apr 4 18:27:32 2016 +0000
Apply suggestion from HJ Lu to avoid misaligned stack in test
Fixes PR27191
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@265322
91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/asan/TestCases/Linux/clone_test.cc
b/test/asan/TestCases/Linux/clone_test.cc
index e9c1f16..f6eb261 100644
--- a/test/asan/TestCases/Linux/clone_test.cc
+++ b/test/asan/TestCases/Linux/clone_test.cc
@@ -22,7 +22,7 @@ int Child(void *arg) {
int main(int argc, char **argv) {
const int kStackSize = 1 << 20;
- char child_stack[kStackSize + 1];
+ char __attribute__((aligned(16))) child_stack[kStackSize + 1];
char *sp = child_stack + kStackSize; // Stack grows down.
printf("Parent: %p\n", sp);
pid_t clone_pid = clone(Child, sp, CLONE_FILES | CLONE_VM, NULL);
>From gcc-bugs-return-521220-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 13:14:10 2016
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Subject: [Bug testsuite/70520] Incorrect child stack alignment in c-c++-common/asan/clone-test-1.c
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
That is very weird placement of the attribute, then it is array of overaligned
chars rather than aligned array of normal chars.
>From gcc-bugs-return-521221-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 13:19:20 2016
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Subject: [Bug c++/70539] New: ICE on invalid code on x86_64-linux-gnu in cxx_incomplete_type_diagnostic, at cp/typeck2.c:569
Date: Tue, 05 Apr 2016 13:19:00 -0000
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Bug ID: 70539
Summary: ICE on invalid code on x86_64-linux-gnu in
cxx_incomplete_type_diagnostic, at cp/typeck2.c:569
Product: gcc
Version: 6.0
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The following code causes an ICE when compiled with the current GCC trunk on
x86_64-linux-gnu in both 32-bit and 64-bit modes.
It is a regression from 5.3.x.
$ g++-trunk -v
Using built-in specs.
COLLECT_GCC=g++-trunk
COLLECT_LTO_WRAPPER=/usr/local/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/6.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto
--prefix=/usr/local/gcc-trunk --disable-bootstrap
Thread model: posix
gcc version 6.0.0 20160404 (experimental) [trunk revision 234712] (GCC)
$
$ g++-5.3 -c small.cpp
small.cpp: In function ‘void foo()’:
small.cpp:4:8: error: ‘f’ does not name a type
auto f = [&] { return f; };
^
$
$ g++-trunk -c small.cpp
small.cpp: In lambda function:
small.cpp:4:25: error: use of ‘f’ before deduction of ‘auto’
auto f = [&] { return f; };
^
small.cpp:4:25: error: use of ‘foo()::<lambda()>::<f capture>’ before deduction
of ‘auto’
small.cpp:4:28: internal compiler error: in cxx_incomplete_type_diagnostic, at
cp/typeck2.c:569
auto f = [&] { return f; };
^
0x6ce8e3 cxx_incomplete_type_diagnostic(tree_node const*, tree_node const*,
diagnostic_t)
../../gcc-source-trunk/gcc/cp/typeck2.c:569
0x765f99 complete_type_or_maybe_complain(tree_node*, tree_node*, int)
../../gcc-source-trunk/gcc/cp/typeck.c:150
0x7c37fc apply_deduced_return_type(tree_node*, tree_node*)
../../gcc-source-trunk/gcc/cp/semantics.c:9226
0x7342a2 cp_parser_lambda_body
../../gcc-source-trunk/gcc/cp/parser.c:10256
0x7342a2 cp_parser_lambda_expression
../../gcc-source-trunk/gcc/cp/parser.c:9756
0x734c9c cp_parser_primary_expression
../../gcc-source-trunk/gcc/cp/parser.c:4933
0x736d26 cp_parser_postfix_expression
../../gcc-source-trunk/gcc/cp/parser.c:6690
0x73fe6c cp_parser_unary_expression
../../gcc-source-trunk/gcc/cp/parser.c:7988
0x7406c7 cp_parser_cast_expression
../../gcc-source-trunk/gcc/cp/parser.c:8665
0x740cc5 cp_parser_binary_expression
../../gcc-source-trunk/gcc/cp/parser.c:8767
0x7415b0 cp_parser_assignment_expression
../../gcc-source-trunk/gcc/cp/parser.c:9055
0x7419ea cp_parser_constant_expression
../../gcc-source-trunk/gcc/cp/parser.c:9323
0x742174 cp_parser_initializer_clause
../../gcc-source-trunk/gcc/cp/parser.c:20793
0x74391b cp_parser_initializer
../../gcc-source-trunk/gcc/cp/parser.c:20734
0x752bce cp_parser_init_declarator
../../gcc-source-trunk/gcc/cp/parser.c:18604
0x7532b0 cp_parser_simple_declaration
../../gcc-source-trunk/gcc/cp/parser.c:12379
0x7535c1 cp_parser_block_declaration
../../gcc-source-trunk/gcc/cp/parser.c:12248
0x754018 cp_parser_declaration_statement
../../gcc-source-trunk/gcc/cp/parser.c:11860
0x7326db cp_parser_statement
../../gcc-source-trunk/gcc/cp/parser.c:10528
0x732ffc cp_parser_statement_seq_opt
../../gcc-source-trunk/gcc/cp/parser.c:10806
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
$
----------------------------------
void
foo ()
{
auto f = [&] { return f; };
}
>From gcc-bugs-return-521223-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 13:23:44 2016
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Subject: [Bug c++/70539] ICE on invalid code on x86_64-linux-gnu in cxx_incomplete_type_diagnostic, at cp/typeck2.c:569
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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> ---
Dup?
*** This bug has been marked as a duplicate of bug 70540 ***
>From gcc-bugs-return-521222-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 13:23:44 2016
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Subject: [Bug c++/70540] [4.9/5/6 Regression] ICE on invalid code on x86_64-linux-gnu in cxx_incomplete_type_diagnostic, at cp/typeck2.c:569
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--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
*** Bug 70539 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-521224-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 13:27:58 2016
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Subject: [Bug testsuite/70520] Incorrect child stack alignment in c-c++-common/asan/clone-test-1.c
Date: Tue, 05 Apr 2016 13:27:00 -0000
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--- Comment #4 from Andreas Schwab <schwab@linux-m68k.org> ---
Does this really make a difference? I think the attribute still applies to the
object, not the type.
>From gcc-bugs-return-521225-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 13:36:19 2016
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Subject: [Bug libstdc++/70503] [4.9/5/6 Regression] extern "C" functions in src/c++11/thread.cc are global in libstdc++.a
Date: Tue, 05 Apr 2016 13:36:00 -0000
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Tue Apr 5 13:35:32 2016
New Revision: 234746
URL: https://gcc.gnu.org/viewcvs?rev=234746&root=gcc&view=rev
Log:
Ensure std::thread helpers have internal linkage
PR libstdc++/70503
* src/c++11/thread.cc (execute_native_thread_routine,
execute_native_thread_routine_compat): Give internal linkage.
* testsuite/30_threads/thread/70503.cc: New test.
Added:
trunk/libstdc++-v3/testsuite/30_threads/thread/70503.cc
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/src/c++11/thread.cc
>From gcc-bugs-return-521226-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 13:38:36 2016
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Subject: [Bug libstdc++/70548] New: gdb pretty printers hang and spin cpu in gdb session.
Date: Tue, 05 Apr 2016 13:38:00 -0000
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Bug ID: 70548
Summary: gdb pretty printers hang and spin cpu in gdb session.
Product: gcc
Version: unknown
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Assignee: unassigned at gcc dot gnu.org
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Created attachment 38192
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38192&action=edit
stack trace for spinning gdb.
At first I opened this bug,
https://sourceware.org/bugzilla/show_bug.cgi?id=19894
because I had no idea who owned the pretty printers, they referred me here....
gdb spins a cpu and hangs, and the stack trace shows its buried in the pretty
printer. When I disable the pretty printer, I have no problem except that I
can't see my variables in the debugger. :-)
The stack trace is attached.
Thanks.
>From gcc-bugs-return-521227-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 13:54:15 2016
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Subject: [Bug c/70475] -Wmisleading-indentation quetionable in Eigen
Date: Tue, 05 Apr 2016 13:54:00 -0000
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Patrick Palka <ppalka at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2016-04-05
Assignee|unassigned at gcc dot gnu.org |ppalka at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #3 from Patrick Palka <ppalka at gcc dot gnu.org> ---
It doesn't make much sense that we warn for:
if (a) do_stuff();
do_other_stuff();
but not for
if (a) do_stuff();
do_other_stuff();
or for
if (a) do_stuff();
do_other_stuff();
So I agree that the warning is questionable. I'll propose a patch.
>From gcc-bugs-return-521228-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 14:00:28 2016
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Subject: [Bug target/69331] [6 regression] FAIL: 20_util/shared_ptr/thread/default_weaktoshared.cc execution test
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Bill Seurer <seurer at linux dot vnet.ibm.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |seurer at linux dot vnet.ibm.com
--- Comment #8 from Bill Seurer <seurer at linux dot vnet.ibm.com> ---
This affects powerpc64 little endian as well but not apparently big endian.
>From gcc-bugs-return-521229-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 14:10:50 2016
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Subject: [Bug libstdc++/70503] [4.9/5 Regression] extern "C" functions in src/c++11/thread.cc are global in libstdc++.a
Date: Tue, 05 Apr 2016 14:10:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |6.0
Summary|[4.9/5/6 Regression] extern |[4.9/5 Regression] extern
|"C" functions in |"C" functions in
|src/c++11/thread.cc are |src/c++11/thread.cc are
|global in libstdc++.a |global in libstdc++.a
Known to fail|6.0 |
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Fixed on trunk so far.
>From gcc-bugs-return-521230-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 14:13:44 2016
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Subject: [Bug libstdc++/69331] [6 regression] FAIL: 20_util/shared_ptr/thread/default_weaktoshared.cc execution test
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|target |libstdc++
--- Comment #9 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Changing component to libstdc++ since it's not limited to any single target, or
family of targets.
>From gcc-bugs-return-521231-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 14:23:28 2016
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Subject: [Bug libstdc++/69331] [6 regression] FAIL: 20_util/shared_ptr/thread/default_weaktoshared.cc execution test
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--- Comment #10 from Andreas Schwab <schwab@linux-m68k.org> ---
It really affects all targets and is not a new problem. You can find thousands
of hits on gcc-testresults.
>From gcc-bugs-return-521232-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 14:27:42 2016
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Subject: [Bug tree-optimization/70526] [5 Regression] GCC 6 miscompiles Firefox JIT compiler
Date: Tue, 05 Apr 2016 14:27:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P1 |P2
Known to work| |6.0
Target Milestone|6.0 |5.4
Summary|[6 Regression] GCC 6 |[5 Regression] GCC 6
|miscompiles Firefox JIT |miscompiles Firefox JIT
|compiler |compiler
--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed on trunk sofar.
>From gcc-bugs-return-521233-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 14:27:44 2016
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Subject: [Bug tree-optimization/70526] [5 Regression] GCC 6 miscompiles Firefox JIT compiler
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--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Apr 5 14:26:59 2016
New Revision: 234749
URL: https://gcc.gnu.org/viewcvs?rev=234749&root=gcc&view=rev
Log:
2016-04-05 Richard Biener <rguenther@suse.de>
PR tree-optimization/70526
* tree-sra.c (build_ref_for_offset): Use prev_base to
extract the alias pointer type.
* g++.dg/torture/pr70526.C: New testcase.
Added:
trunk/gcc/testsuite/g++.dg/torture/pr70526.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-sra.c
>From gcc-bugs-return-521234-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 14:40:50 2016
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Subject: [Bug libstdc++/69331] [6 regression] FAIL: 20_util/shared_ptr/thread/default_weaktoshared.cc execution test
Date: Tue, 05 Apr 2016 14:40:00 -0000
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--- Comment #11 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Yes, I'm pretty sure it's not a regression.
>From gcc-bugs-return-521235-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 14:46:26 2016
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Subject: [Bug libstdc++/69331] [6 regression] FAIL: 20_util/shared_ptr/thread/default_weaktoshared.cc execution test
Date: Tue, 05 Apr 2016 14:46:00 -0000
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--- Comment #12 from Christophe Lyon <clyon at gcc dot gnu.org> ---
How do people handle this in practice? I mean it's creating a lot of noise when
you are trying to track regressions.
That's the main reason why I refrained from automating sending regression
warnings :)
>From gcc-bugs-return-521236-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 14:58:40 2016
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Subject: [Bug c++/70539] ICE on invalid code on x86_64-linux-gnu in cxx_incomplete_type_diagnostic, at cp/typeck2.c:569
Date: Tue, 05 Apr 2016 14:58:00 -0000
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--- Comment #2 from Zhendong Su <su at cs dot ucdavis.edu> ---
(In reply to Marek Polacek from comment #1)
> Dup?
>
> *** This bug has been marked as a duplicate of bug 70540 ***
Sorry for the noise; it wasn't intentional. The server somehow wasn't
responding, and I clicked submit a second time.
>From gcc-bugs-return-521237-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 14:59:02 2016
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Subject: [Bug c/70475] -Wmisleading-indentation quetionable in Eigen
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Patrick Palka <ppalka at gcc dot gnu.org> changed:
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--- Comment #4 from Patrick Palka <ppalka at gcc dot gnu.org> ---
The fix to PR c/68187 made resolving this PR a bit more complicated. I'll let
David handle it :)
>From gcc-bugs-return-521238-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 15:05:48 2016
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Subject: [Bug c++/70513] [4.9/5/6 Regression] ICE on invalid C++ code on x86_64-linux-gnu: Segmentation fault
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
I think I see what's happening. I should have a fix soon.
>From gcc-bugs-return-521239-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 15:06:03 2016
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Subject: [Bug libstdc++/69331] FAIL: 20_util/shared_ptr/thread/default_weaktoshared.cc execution test
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Jeffrey A. Law <law at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[6 regression] FAIL: |FAIL:
|20_util/shared_ptr/thread/d |20_util/shared_ptr/thread/d
|efault_weaktoshared.cc |efault_weaktoshared.cc
|execution test |execution test
--- Comment #13 from Jeffrey A. Law <law at redhat dot com> ---
Based on c#10 and c#11, removing regression marker. If Jon can get this fixed,
he'd have final say on whether or not to include the fix in gcc-6.
>From gcc-bugs-return-521240-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 15:08:17 2016
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Subject: [Bug libstdc++/70463] always use first element of mutex pool in src/c++11/shared_ptr.cc
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This would shift the address right to remove the bits that are always zero:
--- a/libstdc++-v3/src/c++11/shared_ptr.cc
+++ b/libstdc++-v3/src/c++11/shared_ptr.cc
@@ -41,7 +41,9 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
const unsigned char invalid = mask + 1;
inline unsigned char key(const void* addr)
- { return _Hash_impl::hash(addr) & mask; }
+ {
+ const int zero_bits = __builtin_ctz(alignof(shared_ptr<void>));
+ return _Hash_impl::hash(addzero_bitsaligned) & mask; }
/* Returns different instances of __mutex depending on the passed address
* in order to limit contention.
>From gcc-bugs-return-521241-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 15:10:19 2016
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Subject: [Bug libstdc++/70463] always use first element of mutex pool in src/c++11/shared_ptr.cc
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Oops, clipboard fail, that's not what I thought I was pasting, this is:
--- a/libstdc++-v3/src/c++11/shared_ptr.cc
+++ b/libstdc++-v3/src/c++11/shared_ptr.cc
@@ -41,7 +41,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
const unsigned char invalid = mask + 1;
inline unsigned char key(const void* addr)
- { return _Hash_impl::hash(addr) & mask; }
+ {
+ const int zero_bits = __builtin_ctz(alignof(shared_ptr<void>));
+ return _Hash_impl::hash(uintptr_t(addr) >> zero_bits) & mask;
+ }
/* Returns different instances of __mutex depending on the passed address
* in order to limit contention.
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Subject: [Bug c++/70549] New: insn does not satisfy its constraints aarch64 gcc-4.8
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70549
Bug ID: 70549
Summary: insn does not satisfy its constraints aarch64 gcc-4.8
Product: gcc
Version: 4.8.4
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: softadmin.lesia at obspm dot fr
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Hello
i m hitting that
error: insn does not satisfy its constraints
(insn 1160 16 17 33 (set (reg:SF 1 x1)
(const_double:SF 1.0e+0 [0x0.8p+1])) sparse-iter/src/ccg_res.cpp:71 37
{*movsf_aarch64}
(nil))
sparse-iter/src/ccg_res.cpp:209:1: internal compiler error: in
reload_cse_simplify_operands, at postreload.c:411
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-4.8/README.Bugs> for instructions.
on
Processor : AArch64 Processor rev 1 (aarch64)
processor : 0
model name : APM X-Gene Mustang board
cpu MHz : 2400.00
fpu : yes
with
gcc (Debian/Linaro 4.8.4-1) 4.8.4
and this command line
g++ -O3 -fPIC -DADD_ -Wall -fopenmp -std=c++11 -DHAVE_CUBLAS
-DMIN_CUDA_ARCH=200 -I/usr/local/cuda/include -I./include -I./control
-I./sparse-iter/include -I./sparse-iter/control -c -o sparse-iter/src/cbicg.o
sparse-iter/src/cbicg.cpp
sparse-iter/src/ccg_res.cpp: In function ‘magma_int_t
magma_ccg_res(magma_c_matrix, magma_c_matrix, magma_c_matrix*,
magma_c_solver_par*, magma_queue_t)’:
>From gcc-bugs-return-521243-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 15:20:43 2016
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Subject: [Bug c++/70549] insn does not satisfy its constraints aarch64 gcc-4.8
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--- Comment #1 from softadmin.lesia at obspm dot fr ---
Created attachment 38193
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38193&action=edit
preprocessed source
>From gcc-bugs-return-521244-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 15:22:13 2016
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Subject: [Bug libstdc++/69331] FAIL: 20_util/shared_ptr/thread/default_weaktoshared.cc execution test
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Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ubizjak at gmail dot com
--- Comment #14 from Uroš Bizjak <ubizjak at gmail dot com> ---
Also fails on alpha [1].
[1] https://gcc.gnu.org/ml/gcc-testresults/2016-04/msg00299.html
>From gcc-bugs-return-521245-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 15:25:09 2016
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From: "ktkachov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70549] insn does not satisfy its constraints aarch64 gcc-4.8
Date: Tue, 05 Apr 2016 15:25:00 -0000
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ktkachov at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |aarch64
Status|UNCONFIRMED |RESOLVED
CC| |ktkachov at gcc dot gnu.org
Known to work| |4.9.4, 5.3.1, 6.0
Resolution|--- |WONTFIX
Known to fail| |4.8.5
--- Comment #2 from ktkachov at gcc dot gnu.org ---
I can reproduce with 4.8 but not with 4.9 or higher.
4.8 is no longer maintained, please try a more recent release.
>From gcc-bugs-return-521246-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 15:42:02 2016
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Subject: [Bug c/70550] New: -Wuninitialized false positives in OpenMP code
Date: Tue, 05 Apr 2016 15:42:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70550
Bug ID: 70550
Summary: -Wuninitialized false positives in OpenMP code
Product: gcc
Version: 6.0
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#ifdef __SIZEOF_INT128__
typedef __int128 T;
#else
typedef long long T;
#endif
void bar (T);
#pragma omp declare target (bar)
void
foo (void)
{
{
int i;
#pragma omp target defaultmap(tofrom:scalar) /* { dg-bogus "is used
uninitialized in this function" } */
{
i = 26;
bar (i);
}
}
{
T j;
#pragma omp target defaultmap(tofrom:scalar) /* { dg-bogus "is used
uninitialized in this function" } */
{
j = 37;
bar (j);
}
}
{
int i;
#pragma omp target /* { dg-bogus "is used
uninitialized in this function" } */
{
i = 26;
bar (i);
}
}
{
T j;
#pragma omp target /* { dg-bogus "is used
uninitialized in this function" } */
{
j = 37;
bar (j);
}
}
{
int i;
#pragma omp target firstprivate (i) /* { dg-warning "is
used uninitialized in this function" } */
{
i = 26;
bar (i);
}
}
{
T j;
#pragma omp target firstprivate (j) /* { dg-warning "is
used uninitialized in this function" } */
{
j = 37;
bar (j);
}
}
{
int i;
#pragma omp target private (i) /* { dg-bogus "is used
uninitialized in this function" } */
{
i = 26;
bar (i);
}
}
{
T j;
#pragma omp target private (j) /* { dg-bogus "is used
uninitialized in this function" } */
{
j = 37;
bar (j);
}
}
}
shows some warnings that are IMNSHO desirable (explicit uses of firstprivate
clause with uninitialized var), and others where it is undesirable (mostly
implicit clauses).
>From gcc-bugs-return-521247-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 15:42:14 2016
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Subject: [Bug c/70550] -Wuninitialized false positives in OpenMP code
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-05
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
Target Milestone|--- |6.0
Ever confirmed|0 |1
>From gcc-bugs-return-521248-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 15:52:00 2016
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Subject: [Bug c++/70549] insn does not satisfy its constraints aarch64 gcc-4.8
Date: Tue, 05 Apr 2016 15:51:00 -0000
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--- Comment #3 from julien.brule at obspm dot fr ---
Le 05/04/2016 17:24, ktkachov at gcc dot gnu.org a écrit :
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70549
>
> ktkachov at gcc dot gnu.org changed:
>
> What |Removed |Added
> ----------------------------------------------------------------------------
> Target| |aarch64
> Status|UNCONFIRMED |RESOLVED
> CC| |ktkachov at gcc dot gnu.org
> Known to work| |4.9.4, 5.3.1, 6.0
> Resolution|--- |WONTFIX
> Known to fail| |4.8.5
>
> --- Comment #2 from ktkachov at gcc dot gnu.org ---
> I can reproduce with 4.8 but not with 4.9 or higher.
> 4.8 is no longer maintained, please try a more recent release.
>
sorry to bother you but i'm stuck with the 4.8
is there a way to make it work ?
thanks
>From gcc-bugs-return-521249-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 15:52:33 2016
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Subject: [Bug middle-end/70550] -Wuninitialized false positives in OpenMP code
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 38194
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38194&action=edit
gcc6-pr70550.patch
Untested fix.
>From gcc-bugs-return-521250-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 16:05:14 2016
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Subject: [Bug c++/70513] [4.9/5/6 Regression] ICE on invalid C++ code on x86_64-linux-gnu: Segmentation fault
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--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
No, I misunderstood, that would make us accept the code. But at least I have
simpler testcase:
struct S
{
enum E : int;
enum S::E : int { foo } e;
};
>From gcc-bugs-return-521251-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 16:27:25 2016
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Subject: [Bug target/70510] ICE: output_operand: invalid %-code with -mavx512bw -masm=intel when emitting vpbroatcast
Date: Tue, 05 Apr 2016 16:27:00 -0000
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--- Comment #4 from uros at gcc dot gnu.org ---
Author: uros
Date: Tue Apr 5 16:26:40 2016
New Revision: 234752
URL: https://gcc.gnu.org/viewcvs?rev=234752&root=gcc&view=rev
Log:
PR target/70510
* config/i386/sse.md (iptr): Add V64QI, V32HI, V16SI and V8DI modes.
testsuite/ChangeLog:
PR target/70510
* gcc.target/i386/pr70510.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr70510.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/sse.md
trunk/gcc/testsuite/ChangeLog
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From: "ktkachov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70549] insn does not satisfy its constraints aarch64 gcc-4.8
Date: Tue, 05 Apr 2016 16:28:00 -0000
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ktkachov at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |clyon at gcc dot gnu.org
--- Comment #4 from ktkachov at gcc dot gnu.org ---
Hmm, I can't seem to find a particular commit or PR from a quick scan of the
logs.
But then again, the "insn does not satisfy its constraints" is a fairly common
ICE.
your GCC reports "gcc (Debian/Linaro 4.8.4-1) 4.8.4"
Therefore I'd report it to Linaro.
Christophe, can you help with this?
>From gcc-bugs-return-521253-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 16:35:38 2016
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Subject: [Bug c++/70551] New: member function of template instantiated even though only declaration is needed
Date: Tue, 05 Apr 2016 16:35:00 -0000
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Bug ID: 70551
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This code fails to compile:
template<typename T>
struct X
{
X(X&&) { static_assert(sizeof(T) < 1, "Intentional Failure"); }
};
auto impl() -> X<int>;
auto test() -> decltype(impl())
{
return impl();
}
int main()
{
test();
}
My understanding is that it should compile just fine. I admit, I started a
discussion on stackoverflow for this (see
http://stackoverflow.com/questions/36371571/clang-and-gcc-vs-msvc-and-icc-is-a-static-assert-in-the-copy-move-constructor-r)
Citing from the answer I deem correct:
Copy elision requires declaration of copy/move constructors but doesn't require
definition.
Member function definitions of templates are not instantiated unless their
definitions are required.
If a definition is not instantiated it cannot be tested for being ill-formed.
References:
14.7.1.1 …The implicit instantiation of a class template specialization causes
the implicit instantiation of the declarations, but not of the definitions,
default arguments, or exception-specifications of the class member functions…
14.7.1.2 Unless a member of a class template… has been explicitly instantiated
or explicitly specialized, the specialization of the member is implicitly
instantiated when the specialization is referenced in a context that requires
the member definition to exist…
>From gcc-bugs-return-521254-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 16:40:51 2016
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Subject: [Bug c++/70452] [5/6 Regression] Regression in C++ parsing performance between 4.9.3 and 5.3.1
Date: Tue, 05 Apr 2016 16:40:00 -0000
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--- Comment #10 from Patrick Palka <ppalka at gcc dot gnu.org> ---
Author: ppalka
Date: Tue Apr 5 16:40:00 2016
New Revision: 234753
URL: https://gcc.gnu.org/viewcvs?rev=234753&root=gcc&view=rev
Log:
Fix PR c++/70452 (regression in C++ parsing performance)
gcc/cp/ChangeLog:
PR c++/70452
* constexpr.c (struct fundef_copy): New struct.
(struct fundef_copies_table_t): New struct.
(fundef_copies_table): New static variable.
(maybe_initialize_fundef_copies_table): New static function.
(get_fundef_copy): New static function.
(save_fundef_copy): New static function.
(cxx_eval_call_expression): Use get_fundef_copy, and
save_fundef_copy.
(constexpr_call_table): Add "deletable" GTY marker.
gcc/testsuite/ChangeLog:
PR c++/70452
* g++.dg/ext/constexpr-vla4.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/ext/constexpr-vla4.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/constexpr.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug libstdc++/70463] always use first element of mutex pool in src/c++11/shared_ptr.cc
Date: Tue, 05 Apr 2016 16:53:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |INVALID
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #0)
> From https://bugzilla.redhat.com/show_bug.cgi?id=1315388
>
>
> const unsigned char mask = 0xf;
>
> inline unsigned char key(const void* addr)
> { return _Hash_impl::hash(addr) & mask; }
>
> This always returns 0 when addresses are 4-byte aligned.
Bah, no it doesn't. That's what std::hash<void*> does, but not
_Hash_impl::hash.
>From gcc-bugs-return-521256-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 16:59:36 2016
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Subject: [Bug tree-optimization/70509] wrong code with extract from a v64qi
Date: Tue, 05 Apr 2016 16:59:00 -0000
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--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Apr 5 16:58:50 2016
New Revision: 234754
URL: https://gcc.gnu.org/viewcvs?rev=234754&root=gcc&view=rev
Log:
PR tree-optimization/70509
* tree-ssa-forwprop.c (simplify_bitfield_ref): Use bitsize_int instead
of the vector base type for index.
* gcc.target/i386/avx512bw-pr70509.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/avx512bw-pr70509.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-forwprop.c
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/67376] [5 regression] Comparison with pointer to past-the-end of array fails inside constant expression
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |6.0
Summary|[5/6 regression] Comparison |[5 regression] Comparison
|with pointer to |with pointer to
|past-the-end of array fails |past-the-end of array fails
|inside constant expression |inside constant expression
Known to fail|6.0 |
--- Comment #19 from Martin Sebor <msebor at gcc dot gnu.org> ---
With the change committed in r234698 this is no longer a GCC 6 regression so
I'm adjusting the regression marker but leaving it for 5 since the change
hasn't been backported to the 5.x branch.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70509
--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Apr 5 17:01:52 2016
New Revision: 234755
URL: https://gcc.gnu.org/viewcvs?rev=234755&root=gcc&view=rev
Log:
PR tree-optimization/70509
* simplify-rtx.c (simplify_binary_operation_1) <case VEC_SELECT>:
Shift HOST_WIDE_INT_1U instead of 1.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/simplify-rtx.c
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Subject: [Bug c++/70551] member function of template instantiated even though only declaration is needed
Date: Tue, 05 Apr 2016 17:05:00 -0000
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Your interpretation would mean that whether a compiler performs copy elision
would change whether a program is well-formed or not (rather than only changing
whether any side effects of the constructor call happen). That is not a
reasonable interpretation IMHO.
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Subject: [Bug rtl-optimization/70542] [6 Regression] Wrong code with -O3 -mavx2.
Date: Tue, 05 Apr 2016 17:06:00 -0000
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--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Apr 5 17:05:23 2016
New Revision: 234756
URL: https://gcc.gnu.org/viewcvs?rev=234756&root=gcc&view=rev
Log:
PR rtl-optimization/70542
* ree.c (add_removable_extension): For VECTOR_MODE_P punt
if there are any uses other than insn or debug insns.
* gcc.dg/torture/pr70542.c: New test.
* gcc.target/i386/avx2-pr70542.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr70542.c
trunk/gcc/testsuite/gcc.target/i386/avx2-pr70542.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/ree.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug rtl-optimization/70542] [6 Regression] Wrong code with -O3 -mavx2.
Date: Tue, 05 Apr 2016 17:09:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug libstdc++/70503] [4.9/5 Regression] extern "C" functions in src/c++11/thread.cc are global in libstdc++.a
Date: Tue, 05 Apr 2016 17:28:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70503
--- Comment #5 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Jonathan Wakely from comment #4)
> Fixed on trunk so far.
The testcase probably needs some special handling due to -static, it fails on
Fedora 23 with:
spawn -ignore SIGHUP /ssd/uros/gcc-build/./gcc/xg++ -shared-libgcc
-B/ssd/uros/gcc-build/./gcc -nostdinc++
-L/ssd/uros/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/src
-L/ssd/uros/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/src/.libs
-L/ssd/uros/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/libsupc++/.libs
-B/usr/local/x86_64-pc-linux-gnu/bin/ -B/usr/local/x86_64-pc-linux-gnu/lib/
-isystem /usr/local/x86_64-pc-linux-gnu/include -isystem
/usr/local/x86_64-pc-linux-gnu/sys-include
-B/ssd/uros/gcc-build/x86_64-pc-linux-gnu/./libstdc++-v3/src/.libs
-D_GLIBCXX_ASSERT -fmessage-length=0 -ffunction-sections -fdata-sections -g -O2
-D_GNU_SOURCE -DLOCALEDIR="." -nostdinc++
-I/ssd/uros/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu
-I/ssd/uros/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/include
-I/home/uros/gcc-svn/trunk/libstdc++-v3/libsupc++
-I/home/uros/gcc-svn/trunk/libstdc++-v3/include/backward
-I/home/uros/gcc-svn/trunk/libstdc++-v3/testsuite/util
/home/uros/gcc-svn/trunk/libstdc++-v3/testsuite/30_threads/thread/70503.cc
-std=gnu++11 -static -fno-diagnostics-show-caret -fdiagnostics-color=never
./libtestc++.a -Wl,--gc-sections
-L/ssd/uros/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/src/filesystem/.libs -lm
-o ./70503.exe
/usr/bin/ld: cannot find -lm
/usr/bin/ld: cannot find -lc
collect2: error: ld returned 1 exit status
compiler exited with status 1
output is:
/usr/bin/ld: cannot find -lm
/usr/bin/ld: cannot find -lc
collect2: error: ld returned 1 exit status
FAIL: 30_threads/thread/70503.cc (test for errors, line 30)
FAIL: 30_threads/thread/70503.cc (test for errors, line 31)
FAIL: 30_threads/thread/70503.cc (test for excess errors)
Excess errors:
/usr/bin/ld: cannot find -lm
/usr/bin/ld: cannot find -lc
and:
spawn -ignore SIGHUP /ssd/uros/gcc-build/./gcc/xg++ -shared-libgcc
-B/ssd/uros/gcc-build/./gcc -nostdinc++
-L/ssd/uros/gcc-build/x86_64-pc-linux-gnu/32/libstdc++-v3/src
-L/ssd/uros/gcc-build/x86_64-pc-linux-gnu/32/libstdc++-v3/src/.libs
-L/ssd/uros/gcc-build/x86_64-pc-linux-gnu/32/libstdc++-v3/libsupc++/.libs
-B/usr/local/x86_64-pc-linux-gnu/bin/ -B/usr/local/x86_64-pc-linux-gnu/lib/
-isystem /usr/local/x86_64-pc-linux-gnu/include -isystem
/usr/local/x86_64-pc-linux-gnu/sys-include -m32
-B/ssd/uros/gcc-build/x86_64-pc-linux-gnu/32/libstdc++-v3/src/.libs
-D_GLIBCXX_ASSERT -fmessage-length=0 -ffunction-sections -fdata-sections -g -O2
-D_GNU_SOURCE -DLOCALEDIR="." -nostdinc++
-I/ssd/uros/gcc-build/x86_64-pc-linux-gnu/32/libstdc++-v3/include/x86_64-pc-linux-gnu
-I/ssd/uros/gcc-build/x86_64-pc-linux-gnu/32/libstdc++-v3/include
-I/home/uros/gcc-svn/trunk/libstdc++-v3/libsupc++
-I/home/uros/gcc-svn/trunk/libstdc++-v3/include/backward
-I/home/uros/gcc-svn/trunk/libstdc++-v3/testsuite/util
/home/uros/gcc-svn/trunk/libstdc++-v3/testsuite/30_threads/thread/70503.cc -m32
-std=gnu++11 -static -fno-diagnostics-show-caret -fdiagnostics-color=never
./libtestc++.a -Wl,--gc-sections
-L/ssd/uros/gcc-build/x86_64-pc-linux-gnu/32/libstdc++-v3/src/filesystem/.libs
-lm -o ./70503.exe
/usr/bin/ld: cannot find -lm
/usr/bin/ld: cannot find -lc
collect2: error: ld returned 1 exit status
compiler exited with status 1
output is:
/usr/bin/ld: cannot find -lm
/usr/bin/ld: cannot find -lc
collect2: error: ld returned 1 exit status
FAIL: 30_threads/thread/70503.cc (test for errors, line 30)
FAIL: 30_threads/thread/70503.cc (test for errors, line 31)
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70513] [4.9/5/6 Regression] ICE on invalid C++ code on x86_64-linux-gnu: Segmentation fault
Date: Tue, 05 Apr 2016 17:36:00 -0000
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--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
All right, I've got it now: we need to catch the extra qualification, similarly
as in
struct T
{
struct U;
struct T::U {};
};
I've got a patch.
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70552] New: __builtin_constant_p fails to reflect the constness of constexpr calls
Date: Tue, 05 Apr 2016 17:37:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70552
Bug ID: 70552
Summary: __builtin_constant_p fails to reflect the constness of
constexpr calls
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
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Target Milestone: ---
While testing the __builtin_constant_p() intrinsic to better understand the
motivation for and problems with bug 14505, I discovered that the built-in
doesn't behave as documented for calls to constexpr functions as arguments
except in constexpr contexts, or unless optimization is enabled. For example,
the following program compiles successfully (i.e., both static assertions pass)
but then aborts at runtime.
Since not every call to a given constexpr function is necessarily a core
constant expression (i.e., a compile-time constant), for the instrinsic to be
useful with C++ constexpr expressions it needs to return the same result for
the same argument regardless of the context in which it's invoked.
This may be related to the problem as pointed out in comment #6 on bug 65656,
though the complaint there seems to be about the built-in yielding false
negatives due to folding non-constexpr expressions too early, while the problem
here seems to be that the built-in isn't attempting to fold the constexpr
function call at all without optimization.
$ cat t.c && /build/gcc-trunk/gcc/xgcc -B /build/gcc-trunk/gcc -Wall -Wextra
-Wpedantic -xc++ t.c && ./a.out
constexpr int foo () { return 1; }
#define A(e) static_assert ((e), #e)
A (1 == foo ());
A (1 == __builtin_constant_p (foo ()));
int main ()
{
if (!__builtin_constant_p (foo ()))
__builtin_abort ();
}
Aborted
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Subject: [Bug c++/70552] __builtin_constant_p fails to reflect the constness of constexpr calls
Date: Tue, 05 Apr 2016 17:42:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
Blocks| |55004
Known to fail| |4.9.3, 5.3.0, 6.0
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
The test case aborts at runtime with all versions that support constexpr,
though with 5.1 and prior it also fails the second static_assert (i.e., the one
involving __builtin_constant_p), and optimization has no effect on it.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55004
[Bug 55004] [meta-bug] constexpr issues
>From gcc-bugs-return-521266-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 17:45:45 2016
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Subject: [Bug c++/70452] [5/6 Regression] Regression in C++ parsing performance between 4.9.3 and 5.3.1
Date: Tue, 05 Apr 2016 17:45:00 -0000
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--- Comment #11 from Patrick Palka <ppalka at gcc dot gnu.org> ---
gcc 5 shows:
Execution times (seconds)
phase setup : 0.00 ( 0%) usr 0.00 ( 0%) sys 0.01 ( 0%) wall
1311 kB ( 0%) ggc
phase parsing : 2.10 (100%) usr 0.28 (100%) sys 2.37 (100%)
wall 516276 kB (100%) ggc
|name lookup : 0.03 ( 1%) usr 0.00 ( 0%) sys 0.02 ( 1%) wall
83 kB ( 0%) ggc
|overload resolution : 0.02 ( 1%) usr 0.00 ( 0%) sys 0.01 ( 0%) wall
628 kB ( 0%) ggc
preprocessing : 0.01 ( 0%) usr 0.06 (21%) sys 0.06 ( 3%) wall
2048 kB ( 0%) ggc
parser (global) : 0.04 ( 2%) usr 0.04 (14%) sys 0.09 ( 4%) wall
16180 kB ( 3%) ggc
parser function body : 2.05 (98%) usr 0.18 (64%) sys 2.22 (93%) wall
498040 kB (96%) ggc
TOTAL : 2.10 0.28 2.38
517605 kB
trunk now shows:
Execution times (seconds)
phase setup : 0.00 ( 0%) usr 0.00 ( 0%) sys 0.01 ( 1%) wall
1287 kB ( 1%) ggc
phase parsing : 1.31 (100%) usr 0.21 (100%) sys 1.51 (99%)
wall 203649 kB (99%) ggc
|name lookup : 0.02 ( 2%) usr 0.00 ( 0%) sys 0.03 ( 2%) wall
81 kB ( 0%) ggc
|overload resolution : 0.04 ( 3%) usr 0.00 ( 0%) sys 0.04 ( 3%) wall
628 kB ( 0%) ggc
preprocessing : 0.02 ( 2%) usr 0.08 (38%) sys 0.08 ( 5%) wall
2048 kB ( 1%) ggc
parser (global) : 0.02 ( 2%) usr 0.02 (10%) sys 0.06 ( 4%) wall
7735 kB ( 4%) ggc
parser function body : 1.27 (97%) usr 0.11 (52%) sys 1.37 (90%) wall
193854 kB (95%) ggc
TOTAL : 1.31 0.21 1.52
204947 kB
Hmm, peak memory usage is still about 50MB more than 4.9...
>From gcc-bugs-return-521267-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 17:46:34 2016
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Subject: [Bug libstdc++/70503] [4.9/5 Regression] extern "C" functions in src/c++11/thread.cc are global in libstdc++.a
Date: Tue, 05 Apr 2016 17:46:00 -0000
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--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
That should be fixed at r234757
>From gcc-bugs-return-521268-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 17:52:11 2016
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Subject: [Bug testsuite/70553] New: pr70496.c should exclude Thumb only targets
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Bug ID: 70553
Summary: pr70496.c should exclude Thumb only targets
Product: gcc
Version: 6.0
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CC: ramana.radhakrishnan at arm dot com
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Target: arm-none-eabi
gcc.target/arm/pr70496.c fails with the following error when targeting
Cortex-M3:
"selected processor does not support ARM opcodes"
Since the test contains a .arm directive, it should skip Thumb only devices.
>From gcc-bugs-return-521269-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 17:52:56 2016
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Subject: [Bug libstdc++/70554] New: [6 Regression] _GLIBCXX_ATOMIC_BUILTINS changed value
Date: Tue, 05 Apr 2016 17:52:00 -0000
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Bug ID: 70554
Summary: [6 Regression] _GLIBCXX_ATOMIC_BUILTINS changed value
Product: gcc
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Target Milestone: ---
https://gcc.gnu.org/ml/gcc-patches/2016-03/msg01159.html observes that r232147
changed the value of _GLIBCXX_ATOMIC_BUILTINS in libstdc++, which affects how
atomic ref-counting is done. Previously most targets used atomics for
ref-counts, but now many targets will use the generic fallback which relies on
a mutex.
Code compiled with previous releases will still be using atomics, but code
compiled with gcc-6 will lock a mutex and then perform a non-atomic
increment/decrement, possibly concurrently with other threads that aren't using
the mutex.
This needs to be fixed for gcc-6.
>From gcc-bugs-return-521270-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 17:53:34 2016
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Subject: [Bug libstdc++/70554] [6 Regression] _GLIBCXX_ATOMIC_BUILTINS changed value
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2016-04-05
Target Milestone|--- |6.0
Ever confirmed|0 |1
>From gcc-bugs-return-521271-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 17:57:19 2016
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Subject: [Bug c++/70552] __builtin_constant_p fails to reflect the constness of constexpr calls
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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CC| |jakub at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I believe that has been intentional change not to "inline" constexpr functions
in non-constexpr contexts, unless inlining is enabled, so that one can actually
step through them etc.
>From gcc-bugs-return-521272-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 17:59:14 2016
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Subject: [Bug libstdc++/70554] [6 Regression] _GLIBCXX_ATOMIC_BUILTINS changed value
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>From gcc-bugs-return-521273-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 18:04:40 2016
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Subject: [Bug target/70510] ICE: output_operand: invalid %-code with -mavx512bw -masm=intel when emitting vpbroatcast
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--- Comment #5 from uros at gcc dot gnu.org ---
Author: uros
Date: Tue Apr 5 18:03:55 2016
New Revision: 234758
URL: https://gcc.gnu.org/viewcvs?rev=234758&root=gcc&view=rev
Log:
PR target/70510
* config/i386/sse.md (iptr): Add V64QI, V32HI, V16SI and V8DI modes.
testsuite/ChangeLog:
PR target/70510
* gcc.target/i386/pr70510.c: New test.
Added:
branches/gcc-5-branch/gcc/testsuite/gcc.target/i386/pr70510.c
Modified:
branches/gcc-5-branch/gcc/ChangeLog
branches/gcc-5-branch/gcc/config/i386/sse.md
branches/gcc-5-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-521274-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 18:16:17 2016
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Subject: [Bug c++/70551] member function of template instantiated even though only declaration is needed
Date: Tue, 05 Apr 2016 18:16:00 -0000
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--- Comment #2 from Roland B <rbock at eudoxos dot de> ---
(In reply to Jonathan Wakely from comment #1)
> Your interpretation would mean that whether a compiler performs copy elision
> would change whether a program is well-formed or not (rather than only
> changing whether any side effects of the constructor call happen). That is
> not a reasonable interpretation IMHO.
I see your point, but when I remove the definition from the code, it compiles
just fine, because the definition is irrelevant in case of copy elision.
So I could have the move constructor's declaration in file A and the definition
in file B. If the definition is irrelevant, why would it matter whether or not
I include the file B containing the definition?
>From gcc-bugs-return-521275-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 18:31:49 2016
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Subject: [Bug c/70475] -Wmisleading-indentation quetionable in Eigen
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |manu at gcc dot gnu.org
--- Comment #5 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
(In reply to Markus Trippelsdorf from comment #2)
> (In reply to Markus Trippelsdorf from comment #1)
> > See discussion in PR69415.
>
> Sorry wrong bug number.
> IMHO it is OK to warn for the code above.
I also agree with this and I think the warning seems appropriate. An even
clearer case:
if (a) not_error();
goto everything_ok;
goto error;
or what about:
if (a)
not_error();
goto everything_ok;
goto error;
This is not Python! :-)
Note that you can easily silence the warning with explicit braces.
I think we discussed adding a heuristic for column 1 such that we would not
warn for:
else
do_stuff();
more_stuff();
if (a) do_stuff();
more_stuff();
However, I'm not sure it was ever added.
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Subject: [Bug tree-optimization/70547] Optimize multiplication of booleans to bit_and
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
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--- Comment #2 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
Hum, perhaps we should warn about such nonsense code, as suggested in PR45780:
warning: arithmetic applied to boolean expression
return (a<b)*(c<d);
^
&&
It could be simply a bug.
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Subject: [Bug target/70510] ICE: output_operand: invalid %-code with -mavx512bw -masm=intel when emitting vpbroatcast
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--- Comment #6 from uros at gcc dot gnu.org ---
Author: uros
Date: Tue Apr 5 18:48:26 2016
New Revision: 234760
URL: https://gcc.gnu.org/viewcvs?rev=234760&root=gcc&view=rev
Log:
PR target/70510
* config/i386/sse.md (iptr): Add V16SI and V8DI modes.
Modified:
branches/gcc-4_9-branch/gcc/ChangeLog
branches/gcc-4_9-branch/gcc/config/i386/sse.md
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Subject: [Bug target/70510] ICE: output_operand: invalid %-code with -mavx512bw -masm=intel when emitting vpbroatcast
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Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
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Assignee|kyukhin at gcc dot gnu.org |ubizjak at gmail dot com
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--- Comment #7 from Uroš Bizjak <ubizjak at gmail dot com> ---
Fixed everywhere.
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Subject: [Bug libstdc++/70554] [6 Regression] _GLIBCXX_ATOMIC_BUILTINS changed value
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Tue Apr 5 19:03:46 2016
New Revision: 234761
URL: https://gcc.gnu.org/viewcvs?rev=234761&root=gcc&view=rev
Log:
Restore atomic builtins usage in libstdc++-v3
PR libstdc++/70554
* acinclude.m4 (GLIBCXX_ENABLE_ATOMIC_BUILTINS): Don't test
__atomic_fetch_add for bool.
* configure: Regenerate.
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/acinclude.m4
trunk/libstdc++-v3/configure
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Subject: [Bug libstdc++/70554] [6 Regression] _GLIBCXX_ATOMIC_BUILTINS changed value
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Done.
>From gcc-bugs-return-521281-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 19:19:44 2016
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Subject: [Bug tree-optimization/70547] Optimize multiplication of booleans to bit_and
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--- Comment #3 from Marc Glisse <glisse at gcc dot gnu.org> ---
In this case, the code was deliberately written this way, presumably to avoid
the branching in &&. Using & would be better (and that's what I am suggesting
we optimize it to), but * doesn't seem nonsensical to me. (we can still add a
warning if you want)
PR 45780 seems to be about something completely different, and the code here
would not trigger the warning requested there (the result is the same if we
replace bool by int everywhere).
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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++/70552] __builtin_constant_p fails to reflect the constness of constexpr calls
Date: Tue, 05 Apr 2016 19:23:00 -0000
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--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Yes, thanks for pointing that out. I think the change is r233671. I certainly
agree that it's useful to be able to step through constexpr functions in
non-constexpr contexts. In the test case below, however, the definition of
foo() isn't emitted into the object file so it cannot be stepped into. The
builtin simply returns the wrong result. I hope we can make it so that it
returns the useful result I described in comment #0 while still maintaining the
useful debuggability outside of constexpr contexts.
>From gcc-bugs-return-521283-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 19:34:38 2016
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Subject: [Bug c++/70552] __builtin_constant_p fails to reflect the constness of constexpr calls
Date: Tue, 05 Apr 2016 19:34:00 -0000
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--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
As an aside, Clang does evaluate both __builtin_constant_p(foo()) expressions
in the test case consistently to 1, and like GCC, also without emitting code
for foo(). Also like GCC, it emits a definition of foo() if it's called in the
program outside of a constexpr context (such as the __builtin_constant_p
argument).
>From gcc-bugs-return-521284-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 20:31:34 2016
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Subject: [Bug c++/70549] insn does not satisfy its constraints aarch64 gcc-4.8
Date: Tue, 05 Apr 2016 20:31:00 -0000
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--- Comment #5 from softadmin.lesia at obspm dot fr ---
finally i can use gcc 4.9
thanks
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Subject: [Bug ipa/66223] [5 Regression] Diagnostic of pure virtual function call broken, including __cxa_pure_virtual
Date: Tue, 05 Apr 2016 20:59:00 -0000
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--- Comment #16 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Author: hubicka
Date: Tue Apr 5 20:58:56 2016
New Revision: 234762
URL: https://gcc.gnu.org/viewcvs?rev=234762&root=gcc&view=rev
Log:
PR ipa/66223
* ipa-devirt.c (maybe_record_node): Fix comment; use
SANITIZE_UNREACHABLE instead of SANITIZE_UNDEFINED.
* g++.dg/ipa/devirt-51.C: Use -fsanitize=unreachable.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/ipa-devirt.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/g++.dg/ipa/devirt-51.C
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Subject: [Bug c++/70336] [5/6 regression] Incorrect Wconversion warning
Date: Tue, 05 Apr 2016 21:34:00 -0000
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--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Apr 5 21:33:37 2016
New Revision: 234764
URL: https://gcc.gnu.org/viewcvs?rev=234764&root=gcc&view=rev
Log:
PR c++/70336
* match.pd (nested int casts): Limit to GIMPLE.
* c-c++-common/pr70336.c: New test.
* gcc.dg/torture/builtin-isinf_sign-1.c (foo): Guard tests
no longer optimized away at -O0 with #ifndef __OPTIMIZE__.
Added:
trunk/gcc/testsuite/c-c++-common/pr70336.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/match.pd
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/torture/builtin-isinf_sign-1.c
>From gcc-bugs-return-521287-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 21:35:26 2016
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Subject: [Bug c++/70336] [5 regression] Incorrect Wconversion warning
Date: Tue, 05 Apr 2016 21:35:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[5/6 regression] Incorrect |[5 regression] Incorrect
|Wconversion warning |Wconversion warning
--- Comment #12 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed for 6+.
>From gcc-bugs-return-521288-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 21:45:23 2016
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Subject: [Bug fortran/65173] ICE while compiling wrong code
Date: Tue, 05 Apr 2016 21:45:00 -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> ---
Further reduced test:
implicit none
type :: param_t
character(1), dimension(256), allocatable :: names
end type param_t
end
% gfc-trunk pr65173.f90
pr65173.f90:3:55:
character(1), dimension(256), allocatable :: names
1
Error: Allocatable component of structure at (1) must have a deferred shape
f951: internal compiler error: gfc_resolve_expr(): Bad expression type
0x824c5e3 gfc_internal_error(char const*, ...)
../../trunk/gcc/fortran/error.c:1314
0x82b8817 gfc_resolve_expr(gfc_expr*)
../../trunk/gcc/fortran/resolve.c:6409
0x82c15ed resolve_index_expr
../../trunk/gcc/fortran/resolve.c:10958
0x82c16df resolve_charlen
../../trunk/gcc/fortran/resolve.c:11003
0x82c621d resolve_fl_derived0
../../trunk/gcc/fortran/resolve.c:13208
0x82c6bf7 resolve_fl_derived
../../trunk/gcc/fortran/resolve.c:13413
0x82c7656 resolve_symbol
../../trunk/gcc/fortran/resolve.c:13687
0x82de443 do_traverse_symtree
../../trunk/gcc/fortran/symbol.c:3817
0x82cb17f resolve_types
../../trunk/gcc/fortran/resolve.c:15476
0x82cb550 gfc_resolve(gfc_namespace*)
../../trunk/gcc/fortran/resolve.c:15586
0x82a6718 resolve_all_program_units
../../trunk/gcc/fortran/parse.c:5552
0x82a6718 gfc_parse_file()
../../trunk/gcc/fortran/parse.c:5804
0x82f40f5 gfc_be_parse_file
../../trunk/gcc/fortran/f95-lang.c:201
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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++/70555] New: ICE in expand_expr_real_1 accessing a multi-dimensional VLA via lambda-capture
Date: Tue, 05 Apr 2016 21:57:00 -0000
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Bug ID: 70555
Summary: ICE in expand_expr_real_1 accessing a
multi-dimensional VLA via lambda-capture
Product: gcc
Version: 6.0
Status: UNCONFIRMED
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Priority: P3
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Target Milestone: ---
The following test case derived from g++.dg/cpp1y/vla7.C causes an ICE in
todays's trunk of 6.0 as well as in 5.x and 4.9.3.
$ cat t.c && /build/gcc-trunk/gcc/xgcc -B /build/gcc-trunk/gcc -S -Wall -Wextra
-Wpedantic -xc++ t.c
int f (int n)
{
int x[n][n];
[&x](int i) {
x[0][i] = 0;
}(5);
}
t.c: In function ‘int f(int)’:
t.c:3:13: warning: ISO C++ forbids variable length array ‘x’ [-Wvla]
int x[n][n];
^
t.c:3:13: warning: ISO C++ forbids variable length array ‘x’ [-Wvla]
t.c:8:1: warning: no return statement in function returning non-void
[-Wreturn-type]
}
^
t.c: In lambda function:
t.c:5:15: warning: ‘<anonymous>’ is used uninitialized in this function
[-Wuninitialized]
[&x](int i) {
^
t.c:6:11: warning: ‘<anonymous>’ is used uninitialized in this function
[-Wuninitialized]
x[0][i] = 0;
~~~~~~^
t.c:5:15: internal compiler error: in expand_expr_real_1, at expr.c:9651
[&x](int i) {
^
0x10a80e1f expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
/src/gcc/trunk/gcc/expr.c:9645
0x10a77f2f expand_expr_real(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
/src/gcc/trunk/gcc/expr.c:7962
0x10a56cf7 expand_expr
/src/gcc/trunk/gcc/expr.h:256
0x10a7939f expand_expr_real_2(separate_ops*, rtx_def*, machine_mode,
expand_modifier)
/src/gcc/trunk/gcc/expr.c:8181
0x1087a59b expand_gimple_stmt_1
/src/gcc/trunk/gcc/cfgexpand.c:3654
0x1087a8eb expand_gimple_stmt
/src/gcc/trunk/gcc/cfgexpand.c:3714
0x1088403f expand_gimple_basic_block
/src/gcc/trunk/gcc/cfgexpand.c:5720
0x10886267 execute
/src/gcc/trunk/gcc/cfgexpand.c:6335
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
>From gcc-bugs-return-521290-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 22:03:30 2016
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Subject: [Bug c++/70555] ICE in expand_expr_real_1 accessing a multi-dimensional VLA via lambda-capture
Date: Tue, 05 Apr 2016 22:03:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
Blocks| |16994
Known to fail| |4.9.3, 5.3.0, 6.0
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Based on the dg-error directive, vla7.C is apparently invalid (though I'm not
sure I see support for it being invalid in the WG21 N3366 referenced in the
error message printed by GCC), but this test case seems valid to me. Hence
ice-on-valid-code.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=16994
[Bug 16994] [meta-bug] VLA and C++
>From gcc-bugs-return-521291-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 22:20:14 2016
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Subject: [Bug c++/70555] ICE in expand_expr_real_1 accessing a multi-dimensional VLA via lambda-capture
Date: Tue, 05 Apr 2016 22:20:00 -0000
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--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Actually, I did find where N3366
(http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2013/n3639.html) disallows
the test case in vla7.C:
Change in 8.3.4 dcl.array paragraph 1 ...:
In a declaration T D where D has the form
D1 [ expression opt ] attribute-specifier-seq opt
and the type of the identifier in the declaration T D1 is
"derived-declarator-type-list T", then the type of the identifier of D is an
array type; [...] T is called the array element type; this type shall not be a
[...] an array of unknown or runtime bound...
According to this specification (which was never ratified and ended up being
removed from the final C++ standard), the test case in comment #0 would also be
ill-formed. Yet, GCC accepts such VLAs in most (all?) other contexts, so I'm
not sure that rejecting them here is helpful (though it certainly is
inconsistent).
I'm going to leave this as ice-on-valid code since as long as such arrays are
accepted in other contexts I think it makes sense to accept it here (and also
in vla7.C).
>From gcc-bugs-return-521293-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 22:29:30 2016
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Subject: [Bug c++/69733] -Wignored-qualifiers points to wrong const
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-05
CC| |manu at gcc dot gnu.org
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>From gcc-bugs-return-521292-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 22:29:08 2016
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Subject: [Bug other/8757] GCC crash when sizeof (long) > sizeof (char *), (splay_tree_compare_fn)strcmp is wrong
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
CC| |manu at gcc dot gnu.org
Resolution|--- |FIXED
--- Comment #6 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
It seems this was fixed a long time ago. Oldest ICE-on-valid!
>From gcc-bugs-return-521294-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 22:33:13 2016
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Subject: [Bug c/8960] invalid error mode `SI' applied to inappropriate type
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords|ice-on-valid-code |
Last reconfirmed|2008-12-06 09:37:22 |2016-4-5
Version|3.3 |6.0
Summary|Segfault with __attribute__ |invalid error mode `SI'
|((mode (...))) in |applied to inappropriate
|start_function:5702 |type
--- Comment #13 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
Not an ICE
>From gcc-bugs-return-521295-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 22:38:19 2016
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Subject: [Bug c++/14379] accepts invalid duplicate definition of member template
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords|ice-on-valid-code |
Last reconfirmed|2012-01-22 00:00:00 |2016-4-5
CC| |manu at gcc dot gnu.org
Summary|ICE in tsubst with |accepts invalid duplicate
|declaring then defining a |definition of member
|member template |template
--- Comment #4 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
Not an ICE.
>From gcc-bugs-return-521296-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 22:42:39 2016
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Subject: [Bug target/45683] Segmentation fault on large unsigned integer values in C99 mode
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What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
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CC| |manu at gcc dot gnu.org
Version|4.4.2 |6.0
Ever confirmed|0 |1
--- Comment #4 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
Still fails with 6.0
>From gcc-bugs-return-521297-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 22:43:48 2016
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Subject: [Bug rtl-optimization/46002] ICE: in update_copy_costs, at ira-color.c:319 with -fira-algorithm=priority
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----------------------------------------------------------------------------
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--- Comment #6 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
No answer in years, closing.
>From gcc-bugs-return-521298-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 22:58:20 2016
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Subject: [Bug c++/70556] New: ICE in cxx_eval_vec_init_1 on a ill-formed lambda capture of a VLA in a template
Date: Tue, 05 Apr 2016 22:58:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70556
Bug ID: 70556
Summary: ICE in cxx_eval_vec_init_1 on a ill-formed lambda
capture of a VLA in a template
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: msebor at gcc dot gnu.org
Target Milestone: ---
The following ill-formed snippet causes an ICE with today's trunk of GCC 6.0
and all prior versions. In case someone wonders, I ran into it by accident (by
making a typo while writing a test case for a different bug), not by
deliberately trying to break things.
$ cat t.c && /build/gcc-trunk/gcc/xgcc -B /build/gcc-trunk/gcc -S -Wall -Wextra
-Wpedantic -xc++ t.c
template <int N>
int f (int n)
{
int x[1][n];
return [x[0]] /* () { return 0; } */;
}
int i = f<1>(1);
t.c: In function ‘int f(int)’:
t.c:6:12: error: expected ‘,’ before ‘[’ token
return [x[0]] /* () { return 0; } */;
^
t.c:6:12: error: expected identifier before ‘[’ token
t.c: In lambda function:
t.c:6:39: error: expected ‘{’ before ‘;’ token
return [x[0]] /* () { return 0; } */;
^
t.c: In instantiation of ‘int f(int) [with int N = 1]’:
t.c:9:15: required from here
t.c:4:7: warning: ISO C++ forbids variable length array [-Wvla]
int x[1][n];
^
t.c:6:10: internal compiler error: in tree_to_uhwi, at tree.c:7345
return [x[0]] /* () { return 0; } */;
^
0x11504c5b tree_to_uhwi(tree_node const*)
/src/gcc/trunk/gcc/tree.c:7345
0x106f2157 cxx_eval_vec_init_1
/src/gcc/trunk/gcc/cp/constexpr.c:2469
0x106f242f cxx_eval_vec_init_1
/src/gcc/trunk/gcc/cp/constexpr.c:2521
0x106f29d3 cxx_eval_vec_init
/src/gcc/trunk/gcc/cp/constexpr.c:2591
0x106f8ffb cxx_eval_constant_expression
/src/gcc/trunk/gcc/cp/constexpr.c:3872
0x106fa4af cxx_eval_outermost_constant_expr
/src/gcc/trunk/gcc/cp/constexpr.c:4110
0x106fb2cb maybe_constant_value_1
/src/gcc/trunk/gcc/cp/constexpr.c:4298
0x106fb487 maybe_constant_value(tree_node*, tree_node*)
/src/gcc/trunk/gcc/cp/constexpr.c:4322
0x106fb9f3 fold_non_dependent_expr(tree_node*)
/src/gcc/trunk/gcc/cp/constexpr.c:4401
0x1046d70b massage_init_elt
/src/gcc/trunk/gcc/cp/typeck2.c:1229
0x1046e6f7 process_init_constructor_record
/src/gcc/trunk/gcc/cp/typeck2.c:1401
0x1046f66f process_init_constructor
/src/gcc/trunk/gcc/cp/typeck2.c:1609
0x1046cdab digest_init_r
/src/gcc/trunk/gcc/cp/typeck2.c:1123
0x1046d04b digest_init(tree_node*, tree_node*, int)
/src/gcc/trunk/gcc/cp/typeck2.c:1162
0x10601473 finish_compound_literal(tree_node*, tree_node*, int)
/src/gcc/trunk/gcc/cp/semantics.c:2732
0x106d7307 build_lambda_object(tree_node*)
/src/gcc/trunk/gcc/cp/lambda.c:114
0x104346ef tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
/src/gcc/trunk/gcc/cp/pt.c:17123
0x1042c083 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
/src/gcc/trunk/gcc/cp/pt.c:15802
0x10425f4b tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
/src/gcc/trunk/gcc/cp/pt.c:15114
0x10425e73 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
/src/gcc/trunk/gcc/cp/pt.c:15104
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
>From gcc-bugs-return-521299-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 23:06:02 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70018] [4.9/5/6 Regression] Possible issue around IPO and C++ comdats discovered as pure/const
Date: Tue, 05 Apr 2016 23:06:00 -0000
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--- Comment #12 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Created attachment 38195
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38195&action=edit
Patch I am testing
This patch handles const->pure transition for all functions detected const that
are not necessarily binding to current def. I think this is best we can do
without tracking down constness from the FE (i.e. before the folding).
The patch tries to be careful to optimize some cases (such as take into account
that inlined functions will bind locally).
I will try to collect some data on code quality effect.
>From gcc-bugs-return-521300-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 23:12:44 2016
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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++/70556] ICE in cxx_eval_vec_init_1 on a ill-formed lambda capture of a VLA in a template
Date: Tue, 05 Apr 2016 23:12:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-invalid-code
Blocks| |16994
Known to fail| |4.9.3, 5.3.0, 6.0
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
This is only tangentially related to VLAs in that the immediate cause apparent
from the stack trace is cxx_eval_vec_init_1() making the assumption that the
upper bound of the VLA is a constant expression.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=16994
[Bug 16994] [meta-bug] VLA and C++
>From gcc-bugs-return-521301-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 23:40:20 2016
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From: "acahalan at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug other/70557] New: uint64_t zeroing on 32-bit hardware
Date: Tue, 05 Apr 2016 23:40:00 -0000
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Bug ID: 70557
Summary: uint64_t zeroing on 32-bit hardware
Product: gcc
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Created attachment 38196
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C source, gcc 5.3.0 assembly output, IDA Pro disassembly
This is C with gcc 5.3.0 targeting the MCF5272 coldfire (m68k w/o alignment
constraint).
To clear 8 bytes of memory, gcc should always issue a pair of clr.L
instructions.
This applies both when the address is known to the linker (the address should
be contained in an instruction that loads an address register) and when the
address is supplied as a function argument (the address should be loaded into a
register which the clr.L will then use).
Because the hardware is 32-bit, a 64-bit value should be handled the same as a
pair of 32-bit values. Because there is no alignment requirement, 8 adjacent
8-bit values (total of 64 bits) should likewise be handled the same.
All 6 cases (3 access sizes times 2 ways to address the data) are shown in the
provided attachment. Only one of the 6 cases seems optimal, the one named
"clear32p" which takes a pointer to a pair of 32-bit values as a function
argument. The case named "clear32", referring to global data, isn't bad... but
really the address should be loaded into an address register to save 2 bytes.
Though not the worst for performance (that honor going to the 8-bit functions),
the 64-bit functions are particularly painful to look at. With these, gcc
clears out two different registers and then moves both of them into memory. An
obvious optimization would be to clear only a single register and use it twice.
Another obvious optimization would be to directly clear the memory via a clr.L
that uses memory addressing, either absolute or register-based as appropriate,
though loading an address register is even better.
In any case, the 6 functions in this example should compile to 2 distinct kinds
of result. The access size should not change the resulting assembly.
>From gcc-bugs-return-521302-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 23:42:27 2016
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From: "jmargetts at ocz dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/62254] [4.9/5/6 Regression] gcc-4.9 ICEs on linux kernel zlib for armv3
Date: Tue, 05 Apr 2016 23:42:00 -0000
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--- Comment #20 from Julien Margetts <jmargetts at ocz dot com> ---
It is the gcc_assert (REG_P (operands[0])); in arm_reload_in_hi which fires,
which as far as I can see is still in trunk today.
At this point rtx operands[0] looks like this:
08 2d c2 7a 53 2b 00 00
The first pass through this code (no assert) looks like this:
80 b8 c1 7a 53 2b 00 00
NOTE: This was recreated by merging both patches from trunk into otherwise
unchanged 4.9.3 release sources, as I am trying to back port this fix to 4.9.3
>From gcc-bugs-return-521303-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 23:48:09 2016
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Subject: [Bug c++/70512] [6 Regression] ICE on valid code on x86_64-linux-gnu: canonical types differ for identical types
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--- Comment #6 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Author: nathan
Date: Tue Apr 5 23:47:21 2016
New Revision: 234768
URL: https://gcc.gnu.org/viewcvs?rev=234768&root=gcc&view=rev
Log:
PR c++/70512
* class.c (fixup_may_alias): New.
(fixup_attribute_variants): Call it.
* g++.dg/ext/attribute-may-alias-5.C: New.
Added:
trunk/gcc/testsuite/g++.dg/ext/attribute-may-alias-5.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/class.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-521304-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 05 23:49:53 2016
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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++/70512] [6 Regression] ICE on valid code on x86_64-linux-gnu: canonical types differ for identical types
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Nathan Sidwell <nathan at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #7 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Fixed r234768.
>From gcc-bugs-return-521305-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 00:29:22 2016
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Subject: [Bug target/69617] PowerPC/e6500: Atomic byte/halfword operations not properly supported
Date: Wed, 06 Apr 2016 00:29:00 -0000
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Scott wood <scottwood at freescale dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |scottwood at freescale dot com
--- Comment #1 from Scott wood <scottwood at freescale dot com> ---
Decorated storage (lbdx and such) requires cache-inhibited memory, and the
operations are defined by each SoC rather than by the e6500 core -- this makes
it unusable by GCC. The non-decorated l[bh]arx/st[bh]cx. could be used,
though.
>From gcc-bugs-return-521306-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 02:51:35 2016
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Subject: [Bug other/70557] uint64_t zeroing on 32-bit hardware
Date: Wed, 06 Apr 2016 02:51:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70557
--- Comment #1 from Albert Cahalan <acahalan at gmail dot com> ---
For the 32-bit i386, gcc 4.8.4 doesn't zero a pair of registers. I doubt gcc is
doing the best for -Os regarding addressing, but at least the i386 is getting
better code than the m68k coldfire.
>From gcc-bugs-return-521307-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 03:23:05 2016
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Subject: [Bug c++/70452] [5/6 Regression] Regression in C++ parsing performance between 4.9.3 and 5.3.1
Date: Wed, 06 Apr 2016 03:23:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70452
--- Comment #12 from Patrick Palka <ppalka at gcc dot gnu.org> ---
Turns out that a single line of code is responsible for the 50MB increase in
memory usage relative to 4.9, and that's the call to unshare_expr in
cxx_eval_call_expression:
/* Associate the bindings with the remapped parms. */
tree bound = new_call.bindings;
tree remapped = parms;
while (bound)
{
tree oparm = TREE_PURPOSE (bound);
tree arg = TREE_VALUE (bound);
gcc_assert (DECL_NAME (remapped) == DECL_NAME (oparm));
/* Don't share a CONSTRUCTOR that might be changed. */
arg = unshare_expr (arg); // <-------
ctx->values->put (remapped, arg);
bound = TREE_CHAIN (bound);
remapped = DECL_CHAIN (remapped);
}
We unshare each function argument unconditionally even though it's only
necessary to do so for CONSTRUCTORs. This apparently creates a lot of garbage.
I wonder if guarding the unsharing with "TREE_CODE (arg) == CONSTRUCTOR" would
be sufficient?
>From gcc-bugs-return-521308-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 05:24:57 2016
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Subject: [Bug c++/70558] New: POD datatype array crash in initialization when using optimization
Date: Wed, 06 Apr 2016 05:24:00 -0000
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Bug ID: 70558
Summary: POD datatype array crash in initialization when using
optimization
Product: gcc
Version: 5.2.1
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Created attachment 38197
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38197&action=edit
Contains example code to reproduce this problem
I have created a simple POD class named Double, which encapsulates 'double'
type so that comparison operators can be handled in a numerically correct
fashion. This is in the attached .tar.gz file.
My problem is that if a create a fixed array with it and try to initialize all
elements in a single statement then it crashes only when optimization is
enabled.
E.g.:
Double v[3];
v[0] = v[1] = v[2] = 0.0; // <- crash here with -O or -O2 or -O3
Funnily enough, this does not crash if you do
v[0] = 0.0;
v[1] = 0.0;
v[2] = 0.0;
To reproduce this error,
1. Untar the attached file and go to the directory
tar -xvzf double-pod-crash.tar.gz
cd double-pod-crash/
2. Run 'make' and execute the test file.
make
./test # <- This segfaults at the above statement
I saw the crash to be at the above statement by using gdb after recompiling
with -g option.
Please let me know a solution to this problem.
>From gcc-bugs-return-521309-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 05:27:03 2016
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Subject: [Bug target/69617] PowerPC/e6500: Atomic byte/halfword operations not properly supported
Date: Wed, 06 Apr 2016 05:27:00 -0000
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--- Comment #2 from Sebastian Huber <sebastian.huber@embedded-brains.de> ---
Yes, sorry, I meant the load with reservation and store conditional
instructions.
>From gcc-bugs-return-521310-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 07:22:23 2016
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From: "mh+gcc at glandium dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/70559] New: Miscompilation of nsTextFormatter.cpp from Firefox with -Os -fomit-frame-pointer
Date: Wed, 06 Apr 2016 07:22:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70559
Bug ID: 70559
Summary: Miscompilation of nsTextFormatter.cpp from Firefox
with -Os -fomit-frame-pointer
Product: gcc
Version: 4.9.3
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We've recently switched to GCC 4.8 to build Firefox (yeah, I know...), and
valgrind detected an error that we subsequently identified as what looks like a
GCC codegen/ipa bug. I was able to reproduce with GCC 4.9.3 from Debian
(4.9.3-12) on x86-64. It doesn't reproduce with GCC 5, however.
Command line to reproduce:
$ g++ -std=gnu++11 -g -Os -fomit-frame-pointer -fno-exceptions
nsTextFormatter.ii -S -o nsTextFormatter.s
Look at the resulting assembly, and look at what corresponds to
nsTextFormatter.cpp:857 (search for ".loc 1 857). It looks like the following:
.loc 1 857 0
movl 0(%rbp), %eax
leaq 2(%rbp), %r12
.LVL184:
testw %ax, %ax
je .L526
The corresponding C++ is:
while ((c = *aFmt++) != 0) {
where c is a char16_t and aFmt a const char16_t*.
Note how it's using movl to read *aFmt, instead of movw. Which means it can
read 2 bytes past the end of aFmt (and it does, that's what valgrind complains
about, and it does so while reading at a 2-aligned address, so it's not about
the read being considered safe because always 4-aligned, although it might be a
misevaluation of that).
Building with -fno-omit-frame-pointer, the assembly looks like:
.loc 1 857 0
movw (%r12), %ax
leaq 2(%r12), %r13
.LVL183:
testw %ax, %ax
je .L525
>From gcc-bugs-return-521311-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 07:37:37 2016
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Subject: [Bug ipa/70559] Miscompilation of nsTextFormatter.cpp from Firefox with -Os -fomit-frame-pointer
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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> ---
Please attach preprocessed nsTextFormatter.ii.
>From gcc-bugs-return-521312-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 07:43:31 2016
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From: "mh+gcc at glandium dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug ipa/70559] Miscompilation of nsTextFormatter.cpp from Firefox with -Os -fomit-frame-pointer
Date: Wed, 06 Apr 2016 07:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70559
--- Comment #2 from Mike Hommey <mh+gcc at glandium dot org> ---
Created attachment 38198
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38198&action=edit
nsTextFormatter.ii
Err, sorry.
>From gcc-bugs-return-521314-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 07:46:21 2016
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Subject: [Bug c++/70430] Incorrect result for logical "and" operation with mixed vector and scalar
Date: Wed, 06 Apr 2016 07:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70430
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Apr 6 07:45:34 2016
New Revision: 234772
URL: https://gcc.gnu.org/viewcvs?rev=234772&root=gcc&view=rev
Log:
2016-04-06 Richard Biener <rguenther@suse.de>
Backport from mainline
2016-03-30 Richard Biener <rguenther@suse.de>
PR middle-end/70450
* fold-const.c (extract_muldiv_1): Fix thinko in wide_int::from
usage.
* gcc.dg/torture/pr70450.c: New testcase.
2016-03-22 Richard Biener <rguenther@suse.de>
PR middle-end/70333
* fold-const.c (extract_muldiv_1): Properly perform multiplication
in the wide type.
* gcc.dg/torture/pr70333.c: New testcase.
2016-04-04 Richard Biener <rguenther@suse.de>
PR rtl-optimization/70484
* rtl.h (canon_output_dependence): Declare.
* alias.c (canon_output_dependence): New function.
* dse.c (record_store): Use canon_output_dependence rather
than canon_true_dependence.
* gcc.dg/torture/pr70484.c: New testcase.
2016-03-31 Richard Biener <rguenther@suse.de>
PR c++/70430
* typeck.c (cp_build_binary_op): Fix operand order of vector
conditional in truth op handling.
* g++.dg/ext/vector30.C: New testcase.
Added:
branches/gcc-5-branch/gcc/testsuite/g++.dg/ext/vector30.C
branches/gcc-5-branch/gcc/testsuite/gcc.dg/torture/pr70333.c
branches/gcc-5-branch/gcc/testsuite/gcc.dg/torture/pr70450.c
branches/gcc-5-branch/gcc/testsuite/gcc.dg/torture/pr70484.c
Modified:
branches/gcc-5-branch/gcc/ChangeLog
branches/gcc-5-branch/gcc/alias.c
branches/gcc-5-branch/gcc/cp/ChangeLog
branches/gcc-5-branch/gcc/cp/typeck.c
branches/gcc-5-branch/gcc/dse.c
branches/gcc-5-branch/gcc/fold-const.c
branches/gcc-5-branch/gcc/rtl.h
branches/gcc-5-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-521316-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 07:46:21 2016
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Subject: [Bug target/70333] [5 Regression] Test miscompiled with -O0.
Date: Wed, 06 Apr 2016 07:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70333
--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Apr 6 07:45:34 2016
New Revision: 234772
URL: https://gcc.gnu.org/viewcvs?rev=234772&root=gcc&view=rev
Log:
2016-04-06 Richard Biener <rguenther@suse.de>
Backport from mainline
2016-03-30 Richard Biener <rguenther@suse.de>
PR middle-end/70450
* fold-const.c (extract_muldiv_1): Fix thinko in wide_int::from
usage.
* gcc.dg/torture/pr70450.c: New testcase.
2016-03-22 Richard Biener <rguenther@suse.de>
PR middle-end/70333
* fold-const.c (extract_muldiv_1): Properly perform multiplication
in the wide type.
* gcc.dg/torture/pr70333.c: New testcase.
2016-04-04 Richard Biener <rguenther@suse.de>
PR rtl-optimization/70484
* rtl.h (canon_output_dependence): Declare.
* alias.c (canon_output_dependence): New function.
* dse.c (record_store): Use canon_output_dependence rather
than canon_true_dependence.
* gcc.dg/torture/pr70484.c: New testcase.
2016-03-31 Richard Biener <rguenther@suse.de>
PR c++/70430
* typeck.c (cp_build_binary_op): Fix operand order of vector
conditional in truth op handling.
* g++.dg/ext/vector30.C: New testcase.
Added:
branches/gcc-5-branch/gcc/testsuite/g++.dg/ext/vector30.C
branches/gcc-5-branch/gcc/testsuite/gcc.dg/torture/pr70333.c
branches/gcc-5-branch/gcc/testsuite/gcc.dg/torture/pr70450.c
branches/gcc-5-branch/gcc/testsuite/gcc.dg/torture/pr70484.c
Modified:
branches/gcc-5-branch/gcc/ChangeLog
branches/gcc-5-branch/gcc/alias.c
branches/gcc-5-branch/gcc/cp/ChangeLog
branches/gcc-5-branch/gcc/cp/typeck.c
branches/gcc-5-branch/gcc/dse.c
branches/gcc-5-branch/gcc/fold-const.c
branches/gcc-5-branch/gcc/rtl.h
branches/gcc-5-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-521313-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 07:46:01 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70333] [5 Regression] Test miscompiled with -O0.
Date: Wed, 06 Apr 2016 07:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70333
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-521317-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 07:46:21 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70450] [6 Regression] Wrong code with -O0 and -O1.
Date: Wed, 06 Apr 2016 07:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70450
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Apr 6 07:45:34 2016
New Revision: 234772
URL: https://gcc.gnu.org/viewcvs?rev=234772&root=gcc&view=rev
Log:
2016-04-06 Richard Biener <rguenther@suse.de>
Backport from mainline
2016-03-30 Richard Biener <rguenther@suse.de>
PR middle-end/70450
* fold-const.c (extract_muldiv_1): Fix thinko in wide_int::from
usage.
* gcc.dg/torture/pr70450.c: New testcase.
2016-03-22 Richard Biener <rguenther@suse.de>
PR middle-end/70333
* fold-const.c (extract_muldiv_1): Properly perform multiplication
in the wide type.
* gcc.dg/torture/pr70333.c: New testcase.
2016-04-04 Richard Biener <rguenther@suse.de>
PR rtl-optimization/70484
* rtl.h (canon_output_dependence): Declare.
* alias.c (canon_output_dependence): New function.
* dse.c (record_store): Use canon_output_dependence rather
than canon_true_dependence.
* gcc.dg/torture/pr70484.c: New testcase.
2016-03-31 Richard Biener <rguenther@suse.de>
PR c++/70430
* typeck.c (cp_build_binary_op): Fix operand order of vector
conditional in truth op handling.
* g++.dg/ext/vector30.C: New testcase.
Added:
branches/gcc-5-branch/gcc/testsuite/g++.dg/ext/vector30.C
branches/gcc-5-branch/gcc/testsuite/gcc.dg/torture/pr70333.c
branches/gcc-5-branch/gcc/testsuite/gcc.dg/torture/pr70450.c
branches/gcc-5-branch/gcc/testsuite/gcc.dg/torture/pr70484.c
Modified:
branches/gcc-5-branch/gcc/ChangeLog
branches/gcc-5-branch/gcc/alias.c
branches/gcc-5-branch/gcc/cp/ChangeLog
branches/gcc-5-branch/gcc/cp/typeck.c
branches/gcc-5-branch/gcc/dse.c
branches/gcc-5-branch/gcc/fold-const.c
branches/gcc-5-branch/gcc/rtl.h
branches/gcc-5-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-521315-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 07:46:21 2016
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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/70484] [4.9 Regression] Wrong optimization with aliasing and access via char
Date: Wed, 06 Apr 2016 07:46:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |5.4.0
Summary|[4.9/5 Regression] Wrong |[4.9 Regression] Wrong
|optimization with aliasing |optimization with aliasing
|and access via char |and access via char
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Apr 6 07:45:34 2016
New Revision: 234772
URL: https://gcc.gnu.org/viewcvs?rev=234772&root=gcc&view=rev
Log:
2016-04-06 Richard Biener <rguenther@suse.de>
Backport from mainline
2016-03-30 Richard Biener <rguenther@suse.de>
PR middle-end/70450
* fold-const.c (extract_muldiv_1): Fix thinko in wide_int::from
usage.
* gcc.dg/torture/pr70450.c: New testcase.
2016-03-22 Richard Biener <rguenther@suse.de>
PR middle-end/70333
* fold-const.c (extract_muldiv_1): Properly perform multiplication
in the wide type.
* gcc.dg/torture/pr70333.c: New testcase.
2016-04-04 Richard Biener <rguenther@suse.de>
PR rtl-optimization/70484
* rtl.h (canon_output_dependence): Declare.
* alias.c (canon_output_dependence): New function.
* dse.c (record_store): Use canon_output_dependence rather
than canon_true_dependence.
* gcc.dg/torture/pr70484.c: New testcase.
2016-03-31 Richard Biener <rguenther@suse.de>
PR c++/70430
* typeck.c (cp_build_binary_op): Fix operand order of vector
conditional in truth op handling.
* g++.dg/ext/vector30.C: New testcase.
Added:
branches/gcc-5-branch/gcc/testsuite/g++.dg/ext/vector30.C
branches/gcc-5-branch/gcc/testsuite/gcc.dg/torture/pr70333.c
branches/gcc-5-branch/gcc/testsuite/gcc.dg/torture/pr70450.c
branches/gcc-5-branch/gcc/testsuite/gcc.dg/torture/pr70484.c
Modified:
branches/gcc-5-branch/gcc/ChangeLog
branches/gcc-5-branch/gcc/alias.c
branches/gcc-5-branch/gcc/cp/ChangeLog
branches/gcc-5-branch/gcc/cp/typeck.c
branches/gcc-5-branch/gcc/dse.c
branches/gcc-5-branch/gcc/fold-const.c
branches/gcc-5-branch/gcc/rtl.h
branches/gcc-5-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-521318-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 07:46:51 2016
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Subject: [Bug c++/70430] Incorrect result for logical "and" operation with mixed vector and scalar
Date: Wed, 06 Apr 2016 07:46:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |5.4.0
Resolution|--- |FIXED
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-521319-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 07:52:06 2016
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Subject: [Bug tree-optimization/70115] [5 Regression] gcc ICE at -O2 (seg fault) and above on valid code on x86_64-linux-gnu
Date: Wed, 06 Apr 2016 07:52:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70115
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Apr 6 07:51:19 2016
New Revision: 234773
URL: https://gcc.gnu.org/viewcvs?rev=234773&root=gcc&view=rev
Log:
2016-04-06 Richard Biener <rguenther@suse.de>
Backport from mainline
2016-03-01 Richard Biener <rguenther@suse.de>
PR middle-end/70022
* fold-const.c (fold_indirect_ref_1): Fix range checking for
vector BIT_FIELD_REF extract.
* gcc.dg/pr70022.c: New testcase.
2016-03-07 Richard Biener <rguenther@suse.de>
PR tree-optimization/70115
* tree-ssa-loop-ivcanon.c (propagate_into_all_uses): Remove.
(propagate_constants_for_unrolling): Use replace_uses_by.
* gcc.dg/torture/pr70115.c: New testcase.
2016-03-29 Richard Biener <rguenther@suse.de>
PR middle-end/70424
* ipa-prop.c (ipa_compute_jump_functions_for_edge): Always
use alignment returned by get_pointer_alignment_1 if it is
bigger than BITS_PER_UNIT.
* builtins.c (get_pointer_alignment_1): Do not return true
for alignment extracted from SSA info.
Added:
branches/gcc-5-branch/gcc/testsuite/gcc.dg/pr70022.c
branches/gcc-5-branch/gcc/testsuite/gcc.dg/torture/pr70115.c
Modified:
branches/gcc-5-branch/gcc/ChangeLog
branches/gcc-5-branch/gcc/builtins.c
branches/gcc-5-branch/gcc/ipa-prop.c
branches/gcc-5-branch/gcc/testsuite/ChangeLog
branches/gcc-5-branch/gcc/tree-ssa-loop-ivcanon.c
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Subject: [Bug middle-end/70424] [4.9/5 Regression] Pointer derived from integer gets reduced alignment
Date: Wed, 06 Apr 2016 07:52:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70424
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Apr 6 07:51:19 2016
New Revision: 234773
URL: https://gcc.gnu.org/viewcvs?rev=234773&root=gcc&view=rev
Log:
2016-04-06 Richard Biener <rguenther@suse.de>
Backport from mainline
2016-03-01 Richard Biener <rguenther@suse.de>
PR middle-end/70022
* fold-const.c (fold_indirect_ref_1): Fix range checking for
vector BIT_FIELD_REF extract.
* gcc.dg/pr70022.c: New testcase.
2016-03-07 Richard Biener <rguenther@suse.de>
PR tree-optimization/70115
* tree-ssa-loop-ivcanon.c (propagate_into_all_uses): Remove.
(propagate_constants_for_unrolling): Use replace_uses_by.
* gcc.dg/torture/pr70115.c: New testcase.
2016-03-29 Richard Biener <rguenther@suse.de>
PR middle-end/70424
* ipa-prop.c (ipa_compute_jump_functions_for_edge): Always
use alignment returned by get_pointer_alignment_1 if it is
bigger than BITS_PER_UNIT.
* builtins.c (get_pointer_alignment_1): Do not return true
for alignment extracted from SSA info.
Added:
branches/gcc-5-branch/gcc/testsuite/gcc.dg/pr70022.c
branches/gcc-5-branch/gcc/testsuite/gcc.dg/torture/pr70115.c
Modified:
branches/gcc-5-branch/gcc/ChangeLog
branches/gcc-5-branch/gcc/builtins.c
branches/gcc-5-branch/gcc/ipa-prop.c
branches/gcc-5-branch/gcc/testsuite/ChangeLog
branches/gcc-5-branch/gcc/tree-ssa-loop-ivcanon.c
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/70022] [4.9/5 Regression] ICE: in tree_to_shwi, at tree.c:7328 with out-of-bounds vector index
Date: Wed, 06 Apr 2016 07:52:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70022
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Apr 6 07:51:19 2016
New Revision: 234773
URL: https://gcc.gnu.org/viewcvs?rev=234773&root=gcc&view=rev
Log:
2016-04-06 Richard Biener <rguenther@suse.de>
Backport from mainline
2016-03-01 Richard Biener <rguenther@suse.de>
PR middle-end/70022
* fold-const.c (fold_indirect_ref_1): Fix range checking for
vector BIT_FIELD_REF extract.
* gcc.dg/pr70022.c: New testcase.
2016-03-07 Richard Biener <rguenther@suse.de>
PR tree-optimization/70115
* tree-ssa-loop-ivcanon.c (propagate_into_all_uses): Remove.
(propagate_constants_for_unrolling): Use replace_uses_by.
* gcc.dg/torture/pr70115.c: New testcase.
2016-03-29 Richard Biener <rguenther@suse.de>
PR middle-end/70424
* ipa-prop.c (ipa_compute_jump_functions_for_edge): Always
use alignment returned by get_pointer_alignment_1 if it is
bigger than BITS_PER_UNIT.
* builtins.c (get_pointer_alignment_1): Do not return true
for alignment extracted from SSA info.
Added:
branches/gcc-5-branch/gcc/testsuite/gcc.dg/pr70022.c
branches/gcc-5-branch/gcc/testsuite/gcc.dg/torture/pr70115.c
Modified:
branches/gcc-5-branch/gcc/ChangeLog
branches/gcc-5-branch/gcc/builtins.c
branches/gcc-5-branch/gcc/ipa-prop.c
branches/gcc-5-branch/gcc/testsuite/ChangeLog
branches/gcc-5-branch/gcc/tree-ssa-loop-ivcanon.c
>From gcc-bugs-return-521322-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 07:53:17 2016
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Subject: [Bug tree-optimization/70115] [5 Regression] gcc ICE at -O2 (seg fault) and above on valid code on x86_64-linux-gnu
Date: Wed, 06 Apr 2016 07:53:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70115
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |5.4.0
Resolution|--- |FIXED
--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug tree-optimization/68963] [4.9 Regression] O3 vs. O2 discards part of loop and terminates early
Date: Wed, 06 Apr 2016 07:58:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68963
--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Apr 6 07:57:47 2016
New Revision: 234774
URL: https://gcc.gnu.org/viewcvs?rev=234774&root=gcc&view=rev
Log:
2016-04-06 Richard Biener <rguenther@suse.de>
Backport from mainline
2016-02-24 Richard Biener <rguenther@suse.de>
PR middle-end/68963
* tree-ssa-loop-niter.c (derive_constant_upper_bound_ops): Fix
bogus check.
(record_nonwrapping_iv): Do not fall back to the low/high bound
for non-constant IV bases if the stmt is not always executed.
* gcc.dg/torture/pr68963.c: New testcase.
Added:
branches/gcc-5-branch/gcc/testsuite/gcc.dg/torture/pr68963.c
Modified:
branches/gcc-5-branch/gcc/ChangeLog
branches/gcc-5-branch/gcc/testsuite/ChangeLog
branches/gcc-5-branch/gcc/tree-ssa-loop-niter.c
>From gcc-bugs-return-521324-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 08:10:31 2016
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Subject: [Bug middle-end/69983] [6 Regression] FAIL: gcc.dg/graphite/scop-sor.c scan-tree-dump-times graphite "number of SCoPs: 1" 1
Date: Wed, 06 Apr 2016 08:10:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69983
--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Apr 6 08:09:40 2016
New Revision: 234775
URL: https://gcc.gnu.org/viewcvs?rev=234775&root=gcc&view=rev
Log:
2016-04-06 Richard Biener <rguenther@suse.de>
Backport from mainline
2016-02-24 Richard Biener <rguenther@suse.de>
Jakub Jelinek <jakub@redhat.com>
PR middle-end/69760
* tree-scalar-evolution.c (interpret_rhs_expr): Re-write
conditionally executed ops to well-defined overflow behavior.
* gcc.dg/torture/pr69760.c: New testcase.
2016-03-01 Richard Biener <rguenther@suse.de>
PR tree-optimization/69983
* tree-chrec.c (eq_evolutions_p): Handle conversions, compare
types and fall back to operand_equal_p.
* gcc.dg/graphite/isl-codegen-loop-dumping.c: Adjust.
Added:
branches/gcc-5-branch/gcc/testsuite/gcc.dg/torture/pr69760.c
Modified:
branches/gcc-5-branch/gcc/ChangeLog
branches/gcc-5-branch/gcc/testsuite/ChangeLog
branches/gcc-5-branch/gcc/testsuite/gcc.dg/graphite/isl-codegen-loop-dumping.c
branches/gcc-5-branch/gcc/tree-chrec.c
branches/gcc-5-branch/gcc/tree-scalar-evolution.c
>From gcc-bugs-return-521325-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 08:10:32 2016
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Subject: [Bug tree-optimization/69760] [4.9/5 Regression] Wrong 64-bit memory address caused by an unneeded overflowing 32-bit integer multiplication on x86_64 under -O2 and -O3 code optimization
Date: Wed, 06 Apr 2016 08:10:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69760
--- Comment #15 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Apr 6 08:09:40 2016
New Revision: 234775
URL: https://gcc.gnu.org/viewcvs?rev=234775&root=gcc&view=rev
Log:
2016-04-06 Richard Biener <rguenther@suse.de>
Backport from mainline
2016-02-24 Richard Biener <rguenther@suse.de>
Jakub Jelinek <jakub@redhat.com>
PR middle-end/69760
* tree-scalar-evolution.c (interpret_rhs_expr): Re-write
conditionally executed ops to well-defined overflow behavior.
* gcc.dg/torture/pr69760.c: New testcase.
2016-03-01 Richard Biener <rguenther@suse.de>
PR tree-optimization/69983
* tree-chrec.c (eq_evolutions_p): Handle conversions, compare
types and fall back to operand_equal_p.
* gcc.dg/graphite/isl-codegen-loop-dumping.c: Adjust.
Added:
branches/gcc-5-branch/gcc/testsuite/gcc.dg/torture/pr69760.c
Modified:
branches/gcc-5-branch/gcc/ChangeLog
branches/gcc-5-branch/gcc/testsuite/ChangeLog
branches/gcc-5-branch/gcc/testsuite/gcc.dg/graphite/isl-codegen-loop-dumping.c
branches/gcc-5-branch/gcc/tree-chrec.c
branches/gcc-5-branch/gcc/tree-scalar-evolution.c
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Subject: [Bug target/67478] gcc-5.1.0/gcc-5.2.0 undefined symbol std::__once_callable in AIX 6.1
Date: Wed, 06 Apr 2016 08:11:00 -0000
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Qingshan Zhang <qshanz at cn dot ibm.com> changed:
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----------------------------------------------------------------------------
CC| |qshanz at cn dot ibm.com
--- Comment #8 from Qingshan Zhang <qshanz at cn dot ibm.com> ---
Hi, would you please share me how to fix this issue ?
>From gcc-bugs-return-521327-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 08:12:30 2016
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From: "qshanz at cn dot ibm.com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/67478] gcc-5.1.0/gcc-5.2.0 undefined symbol std::__once_callable in AIX 6.1
Date: Wed, 06 Apr 2016 08:12:00 -0000
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--- Comment #9 from Qingshan Zhang <qshanz at cn dot ibm.com> ---
Or do we have any work round for this issue ? Thank you.
>From gcc-bugs-return-521328-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 08:25:47 2016
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70558] POD datatype array crash in initialization when using optimization
Date: Wed, 06 Apr 2016 08:25:00 -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> ---
inline Double &operator =(const double &other) { x = other; }
you fail to return *this:
> g++-5 test.cpp -O -std=c++11 -Wall
In file included from test.cpp:3:0:
Double.h: In member function ‘Double& Double::operator=(const double&)’:
Double.h:24:63: warning: no return statement in function returning non-void
[-Wreturn-type]
inline Double &operator =(const double &other) { x = other; }
>From gcc-bugs-return-521329-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 08:29:07 2016
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/70557] uint64_t zeroing on 32-bit hardware
Date: Wed, 06 Apr 2016 08:29:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Keywords| |missed-optimization
Component|other |target
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
This is a known bug (partly) as GCC currently has no way to combine small
stores
into a larger one (apart from BB vectorization if the result fits a vector
store).
Too lazy to find the duplicate but you can search for it yourself.
Eventually there's a m68k target piece left, so keeping open as target bug.
>From gcc-bugs-return-521330-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 08:46:18 2016
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Subject: [Bug middle-end/70550] -Wuninitialized false positives in OpenMP code
Date: Wed, 06 Apr 2016 08:46:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Attachment #38194|0 |1
is obsolete| |
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 38199
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38199&action=edit
gcc6-pr70550.patch
Updated patch to also handle implicit firstprivate on task/taskloop.
>From gcc-bugs-return-521332-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 08:47:57 2016
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Subject: [Bug target/70557] uint64_t zeroing on 32-bit hardware
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
PR22141 ? We really should tackle that as late GIMPLE pass for GCC 7.
>From gcc-bugs-return-521331-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 08:47:10 2016
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From: "pault at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/43207] [OOP] invalid (pointer) assignment to and from abstract non-polymorphic expressions
Date: Wed, 06 Apr 2016 08:47:00 -0000
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Paul Thomas <pault at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |pault at gcc dot gnu.org
Assignee|janus at gcc dot gnu.org |unassigned at gcc dot gnu.org
Summary|[OOP] invalid pointer |[OOP] invalid (pointer)
|assignment => type%parent |assignment to and from
| |abstract non-polymorphic
| |expressions
--- Comment #12 from Paul Thomas <pault at gcc dot gnu.org> ---
Have changed the title to reflect the fact that the original ICE was fixed.
Have also unassigned Janus, since he has been inactive for quite a long time.
Paul
>From gcc-bugs-return-521333-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 08:47:57 2016
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From: "ramana at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/62254] [4.9/5/6 Regression] gcc-4.9 ICEs on linux kernel zlib for armv3
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--- Comment #21 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> ---
(In reply to Nick Clifton from comment #19)
> (In reply to Julien Margetts from comment #17)
> > The following test case still fails with the patch applied (originally bug
> > 70362)
> >
> > arm-none-eabi-gcc -march=armv3m -c -o c_compat_x_tst.o
> > gcc/testsuite/gcc.dg/compat/scalar-by-value-4_x.c
>
>
> I cannot reproduce this failure. Ie when I compile this test case
> everything works, at -O0 all the way up to -O3.
>
> This is with today's mainline sources, which has *both* of the patches from
> this PR applied. These sources no longer contain this assertion:
>
> gcc_assert (REG_P (operands[0]));
>
> although they do contain:
>
> gcc_assert (REG_P (outval) || SUBREG_P (outval));
>
>
> If the problem really does exist, could someone tell me what outval looks
> like when the assertion is triggered ?
I can't seem to make this fire on trunk anymore and it does look like I was
using a stale build. Sorry about the noise on trunk.
Ramana
>
> Cheers
> Nick
>From gcc-bugs-return-521334-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 08:59:26 2016
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Subject: [Bug fortran/55427] [OOP] ICE with class-array-pointer result
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Paul Thomas <pault at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |dominiq at lps dot ens.fr
--- Comment #3 from Paul Thomas <pault at gcc dot gnu.org> ---
Dear Valery,
This is fixed on trunk and GNU Fortran (GCC) 5.1.1 20150618 (Red Hat 5.1.1-4).
Your example even runs correctly!
I have added Dominique to the CC list in the hope that he can pin down better
when it was fixed. He seems to maintain the world's largest collection of
archaic gcc's :-)
This can be closed once we pin down approximately when it was fixed.
Cheers
Paul
>From gcc-bugs-return-521335-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 09:11:39 2016
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Subject: [Bug fortran/59093] Segfault in gfc_trans_pointer_assignment
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Paul Thomas <pault at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |damian at sourceryinstitute dot or
| |g, pault at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |pault at gcc dot gnu.org
--- Comment #10 from Paul Thomas <pault at gcc dot gnu.org> ---
It is the same as PR34640, which was already assigned to me, PR57116 and is
related to PR40737.
Paul
>From gcc-bugs-return-521336-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 09:25:09 2016
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Subject: [Bug fortran/65438] Unnecessary ptr check
Date: Wed, 06 Apr 2016 09:25:00 -0000
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--- Comment #4 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
Created attachment 38200
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38200&action=edit
patch
>From gcc-bugs-return-521337-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 09:28:42 2016
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Subject: [Bug fortran/65438] Unnecessary ptr check
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Thomas Schwinge <tschwinge at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Severity|normal |minor
--- Comment #5 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
(In reply to Dominique d'Humieres from comment #1)
> > The function check_array_not_assumed (openmp.c) performs an unnecessary
> > check on pointers.
>
> Does this refer to sym->attr.pointer in the lines
>
> if (sym->as && sym->as->type == AS_DEFERRED && sym->attr.pointer
> && !sym->attr.contiguous)
>
> ?
I have now looked this up in our old internal development tree, and found the
patch that I just attached, which goes with a note by Jim stating that it
"removes a needless pointer check. Cesar consulted on this patch". Cesar,
please resolve this in GCC trunk (low priority).
>From gcc-bugs-return-521338-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 09:54:52 2016
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Subject: [Bug libstdc++/63345] Multiple undefined behaviors (static_cast<>) in libstdc++-v3/include/bits
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Malcolm Parsons <malcolm.parsons at gmail dot com> changed:
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CC| |malcolm.parsons at gmail dot com
--- Comment #9 from Malcolm Parsons <malcolm.parsons at gmail dot com> ---
Created attachment 38201
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38201&action=edit
fix undefined behaviour in stl_tree.h
(In reply to Jonathan Wakely from comment #8)
> I believe all the real problems are fixed now.
Clang 3.8.0 still reports undefined behaviour in stl_tree.h using GCC 5.3.0:
lib/gcc/x86_64-unknown-linux-gnu/5.3.0/../../../../include/c++/5.3.0/bits/stl_tree.h:1910:28:
runtime error: upcast of address 0x00000225d260 with insufficient space for an
object of type 'std::_Rb_tree_node<std::pair<const void *const,
testing::(anonymous namespace)::MockObjectState> >'
0x00000225d260: note: pointer points here
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 60 d2 25 02 00
00 00 00 60 d2 25 02
^
The attached patch fixes it for me.
>From gcc-bugs-return-521339-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 10:13:29 2016
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Subject: [Bug libstdc++/63345] Multiple undefined behaviors (static_cast<>) in libstdc++-v3/include/bits
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--- Comment #10 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Malcolm Parsons from comment #9)
> Created attachment 38201 [details]
> fix undefined behaviour in stl_tree.h
>
> (In reply to Jonathan Wakely from comment #8)
> > I believe all the real problems are fixed now.
>
> Clang 3.8.0 still reports undefined behaviour in stl_tree.h using GCC 5.3.0:
>
> lib/gcc/x86_64-unknown-linux-gnu/5.3.0/../../../../include/c++/5.3.0/bits/
> stl_tree.h:1910:28: runtime error: upcast of address 0x00000225d260 with
> insufficient space for an object of type 'std::_Rb_tree_node<std::pair<const
> void *const, testing::(anonymous namespace)::MockObjectState> >'
> 0x00000225d260: note: pointer points here
> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 60 d2 25 02
> 00 00 00 00 60 d2 25 02
> ^
That's expected, as some of the fixes are only on trunk, not the gcc-5 branch.
> The attached patch fixes it for me.
That seems to be a backport of r223746 from trunk, right? I'll look into
applying that to the gcc-5 branch.
>From gcc-bugs-return-521340-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 10:27:57 2016
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Subject: [Bug c++/70513] [4.9/5/6 Regression] ICE on invalid C++ code on x86_64-linux-gnu: Segmentation fault
Date: Wed, 06 Apr 2016 10:27:00 -0000
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--- Comment #5 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
But unfortunately that patch fixes Comment 3 but not the original testcase...
>From gcc-bugs-return-521341-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 10:32:13 2016
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Subject: [Bug tree-optimization/70177] [6 Regression] ICE in extract_ops_from_tree starting with r233660
Date: Wed, 06 Apr 2016 10:32:00 -0000
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--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Apr 6 10:31:27 2016
New Revision: 234776
URL: https://gcc.gnu.org/viewcvs?rev=234776&root=gcc&view=rev
Log:
2016-04-06 Richard Biener <rguenther@suse.de>
Backport from mainline
2016-03-11 Jakub Jelinek <jakub@redhat.com>
PR tree-optimization/70177
* gimple-expr.h (extract_ops_from_tree_1): Renamed to ...
(extract_ops_from_tree): ... this. In the 2 argument
overload remove _1 suffix.
* gimple-expr.c (extract_ops_from_tree_1): Renamed to ...
(extract_ops_from_tree): ... this.
* gimple.c (gimple_build_assign, gimple_assign_set_rhs_from_tree):
Adjust callers.
* tree-ssa-loop-niter.c (derive_constant_upper_bound): Likewise.
* tree-ssa-forwprop.c (defcodefor_name): Call 3 operand
extract_ops_from_tree instead of 2 operand one.
* gcc.dg/pr70177.c: New test.
Added:
branches/gcc-5-branch/gcc/testsuite/gcc.dg/pr70177.c
Modified:
branches/gcc-5-branch/gcc/ChangeLog
branches/gcc-5-branch/gcc/gimple-expr.c
branches/gcc-5-branch/gcc/gimple-expr.h
branches/gcc-5-branch/gcc/gimple.c
branches/gcc-5-branch/gcc/testsuite/ChangeLog
branches/gcc-5-branch/gcc/tree-ssa-forwprop.c
branches/gcc-5-branch/gcc/tree-ssa-loop-niter.c
>From gcc-bugs-return-521342-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 10:44:11 2016
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From: "malcolm.parsons at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/63345] Multiple undefined behaviors (static_cast<>) in libstdc++-v3/include/bits
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--- Comment #11 from Malcolm Parsons <malcolm.parsons at gmail dot com> ---
(In reply to Jonathan Wakely from comment #10)
> > The attached patch fixes it for me.
>
> That seems to be a backport of r223746 from trunk, right? I'll look into
> applying that to the gcc-5 branch.
It looks like it. Thanks.
>From gcc-bugs-return-521344-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 11:04:46 2016
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Subject: [Bug libstdc++/70560] Review configure checks for _GLIBCXX_ATOMIC_BUILTINS and atomicity_dir
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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>From gcc-bugs-return-521343-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 11:04:35 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/70560] New: Review configure checks for _GLIBCXX_ATOMIC_BUILTINS and atomicity_dir
Date: Wed, 06 Apr 2016 11:04:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70560
Bug ID: 70560
Summary: Review configure checks for _GLIBCXX_ATOMIC_BUILTINS
and atomicity_dir
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Target Milestone: ---
Thomas pointed out at https://gcc.gnu.org/ml/gcc-patches/2016-03/msg01159.html
that we test for atomics that work on bool, short and int when defining
_GLIBCXX_ATOMIC_BUILTINS, and then if that's defined we use atomics on
_Atomic_word:
# Set atomicity_dir to builtins if all but the long long test above passes.
if test "$glibcxx_cv_atomic_bool" = yes \
&& test "$glibcxx_cv_atomic_short" = yes \
&& test "$glibcxx_cv_atomic_int" = yes; then
AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS, 1,
[Define if the compiler supports C++11 atomics.])
atomicity_dir=cpu/generic/atomicity_builtins
fi
But _Atomic_word might not be one of those types, e.g. for sparc:
#ifdef __arch64__
typedef long _Atomic_word;
#else
typedef int _Atomic_word;
#endif
The choice of atomicity_dir (i.e. whether to use atomics for _Atomic_word or
not) should be based on tests that actually use that type, and that type only.
I think it should be OK to relax the checks so that atomic builtins are used
for _Atomic_word on targets where _GLIBCXX_ATOMIC_BUILTINS previously wasn't
defined. In that case new code would use the builtins via the inline functions
in <ext/atomicity.h>, and old code would continue to use the non-inline
functions defined in libstdc++.so. Those non-inline functions would now come
from cpu/generic/atomicity_builtins/atomicity.h and so would also use atomic
builtins.
It would not be OK to stop using atomics for _Atomic_word on targets where
_GLIBCXX_ATOMIC_BUILTINS was previously defined. In that case, old code would
use the inlined builtins but new code would call non-inline functions in
cpu/generic/atomicity_mutex/atomicity.h (or a target-specific one) which might
expect to be able to use non-atomic operations protected by a critical section.
That expectation would not hold if other code is modifying the shared variable
directly, outside the critical section.
We could also review whether the __atomic_add_dispatch and
__exchange_and_add_dispatch functions in <ext/atomicity.h> really give much
benefit for anything except the old COW std::string. For std::shared_ptr,
std::future etc. it might make sense to simplify things and use atomics
unconditionally without checking __gthread_active_p().
>From gcc-bugs-return-521345-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 11:14:48 2016
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Subject: [Bug target/60290] 32-bit g++.dg/cilk-plus/CK/catch_exc.cc FAILs on Solaris/x86
Date: Wed, 06 Apr 2016 11:14:00 -0000
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Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target|i386-pc-solaris2.1[01] |i386-pc-solaris2.1[012]
Status|UNCONFIRMED |ASSIGNED
URL| |https://gcc.gnu.org/ml/gcc-
| |patches/2016-04/msg00292.ht
| |ml
Last reconfirmed| |2016-04-06
Host|i386-pc-solaris2.1[01] |i386-pc-solaris2.1[012]
Assignee|unassigned at gcc dot gnu.org |ro at gcc dot gnu.org
Target Milestone|--- |6.0
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Build|i386-pc-solaris2.1[01] |i386-pc-solaris2.1[012]
--- Comment #7 from Rainer Orth <ro at gcc dot gnu.org> ---
Mine, patch posted.
>From gcc-bugs-return-521346-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 11:49:42 2016
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Subject: [Bug middle-end/70561] New: Crash in recog_for_combine_1
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Bug ID: 70561
Summary: Crash in recog_for_combine_1
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Target: s390x
This code in recog_for_combine_1 doesn't look right:
--
if (num_clobbers_to_add)
{
rtx newpat = gen_rtx_PARALLEL (VOIDmode,
rtvec_alloc (GET_CODE (pat) == PARALLEL
? (XVECLEN (pat, 0)
+ num_clobbers_to_add)
: num_clobbers_to_add + 1));
if (GET_CODE (pat) == PARALLEL)
for (i = 0; i < XVECLEN (pat, 0); i++)
XVECEXP (newpat, 0, i) = XVECEXP (pat, 0, i);
else
XVECEXP (newpat, 0, 0) = pat;
add_clobbers (newpat, insn_code_number);
for (i = XVECLEN (newpat, 0) - num_clobbers_to_add;
i < XVECLEN (newpat, 0); i++)
{
if (REG_P (XEXP (XVECEXP (newpat, 0, i), 0)) <=============== crash
&& ! reg_dead_at_p (XEXP (XVECEXP (newpat, 0, i), 0), insn))
return -1;
...
--
For me, there is a crash in the marked line (for some pattern I'm working on)
with "i == 1" because "XVECEXP (newpat, 0, 1)" is "(nil)". If
"num_clobbers_to_add" is > 0, and the original "pat" is not a parallel, only
the first element of newpat is initialised, but the remaining elements are
still accessed. There probably should be something like this in the for loop?
for (...)
{
if (XVECEXP (newpat, 0, i))
/* generate clobber from scratch and store it in XVECEXP (newpat, 0, i)
*/
--
Probably triggered by this splitter:
[(parallel
[(set (match_operand:GPR 0 "nonimmediate_operand" "")
(and:GPR (not:GPR (match_operand:GPR 1 "nonimmediate_operand" ""))
(match_operand:GPR 2 "nonimmediate_operand" "")))
(clobber (reg:CC CC_REGNUM))])]
==>
[
(parallel
[(set (match_dup 3) (and:GPR (match_dup 1) (match_dup 2)))
(clobber (reg:CC CC_REGNUM))])
(parallel
[(set (match_dup 0) (xor:GPR (match_dup 3) (match_dup 2)))
(clobber (reg:CC CC_REGNUM))])]
>From gcc-bugs-return-521347-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 11:51:00 2016
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Subject: [Bug middle-end/70561] Crash in recog_for_combine_1
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--- Comment #1 from Dominik Vogt <vogt at linux dot vnet.ibm.com> ---
P.S.:
(gdb) p debug_rtx(pat)
(set (reg:SI 67 [+4 ])
(and:SI (not:SI (subreg:SI (reg/v:DI 65 [ b+-4 ]) 4))
(mem:SI (plus:DI (reg:DI 2 %r2 [ a ])
(const_int 4 [0x4])) [1 *a_2(D)+4 S4 A32])))
$13 = void
(gdb) p debug_rtx(newpat)
(parallel [
(set (reg:SI 67 [+4 ])
(and:SI (not:SI (subreg:SI (reg/v:DI 65 [ b+-4 ]) 4))
(mem:SI (plus:DI (reg:DI 2 %r2 [ a ])
(const_int 4 [0x4])) [1 *a_2(D)+4 S4 A32])))
(nil)
])
$14 = void
>From gcc-bugs-return-521348-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 11:52:45 2016
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Subject: [Bug c++/70549] insn does not satisfy its constraints aarch64 gcc-4.8
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--- Comment #6 from Christophe Lyon <clyon at gcc dot gnu.org> ---
I've reproduced it too with our latest 4.8, and I confirm it compiles OK with
the very first commit in branch 4.9.
Since you switched to 4.9, I will not investigate more.
>From gcc-bugs-return-521349-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 12:06:25 2016
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Subject: [Bug middle-end/70561] Crash in recog_for_combine_1
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--- Comment #2 from Dominik Vogt <vogt at linux dot vnet.ibm.com> ---
(Ah, probably add_clobbers should have added the clobber, but it hasn't. It
doesn't have any code for that pattern.)
>From gcc-bugs-return-521350-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 12:19:33 2016
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Subject: [Bug target/70557] uint64_t zeroing on 32-bit hardware
Date: Wed, 06 Apr 2016 12:19:00 -0000
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--- Comment #4 from Albert Cahalan <acahalan at gmail dot com> ---
Mostly it's more like PR58741 because of the long long issue.
PR22141 (and PR23684 which is a better match) is about merging small things.
Two of the six examples here show that problem, those being the ones with a
loop over char.
The problem that prompted this bug report and determined the bug title is
different. It's in some way the opposite. When I ask gcc to store a 64-bit zero
value, gcc makes a 64-bit zero value in memory (two identical 32-bit halves in
a pair of 32-bit registers) and then stores that to memory.
There are many ways that this is wrong, and I worry that fixing one problem may
hide the other problems. Depending on compiler internals that I don't
understand, this could perhaps be four bugs:
1. When the two halves of a 64-bit value are identical, there is no need to
load values into two different registers. This is true for many constant
values, though obviously -1 and 0 would be most popular. Other popular values
would be the constants for computing a Hamming weight. AFAIK, this optimization
should apply whenever dealing with values that are larger than registers, such
as 128-bit values on 64-bit platforms.
2. When the address is to be encoded in the instruction that writes to memory,
it is best to directly clear the memory without first generating the constant
in registers. AFAIK, this optimization should apply to most CISC machines. The
fact that there is a special instruction for storing a 0 makes the optimization
more important.
3. When the address is to be encoded in an instruction, sometimes it is best to
place the address in a register and then use that register to supply the
address for storing to memory. This tends to apply when doing lots of writes,
when an address register happens to be available, and when optimizing for size.
AFAIK this optimization applies to most machines.
4. When using an address register to supply the location for storing, often it
is best to use autoincrement addressing instead of distinct offsets. This
usually generates smaller code. AFAIK this applies to many machines, including
at least: arm, m68k, and ppc.
(and also the store-merge issue, which makes 5)
>From gcc-bugs-return-521352-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 12:43:39 2016
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Subject: [Bug c++/39159] unhelpful attribute warning on matching declaration after definition
Date: Wed, 06 Apr 2016 12:43:00 -0000
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Gert <gw.fossdev at gmail dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #5 from Gert <gw.fossdev at gmail dot com> ---
Created attachment 38202
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38202&action=edit
Proposed patch to silence the warning if the new attribute is same
Hello,
I propose the attached patch for this. I'm flying blind here and the patch is
not yet tested.
The idea is to search whether the attribute to be applied is already set and if
this is the case, to not emit a warning, and otherwise to rephrase the warning
pointing out that a different attribute was specified.
The code was inspired by the lines starting from 589 in the same file
gcc/attribs.c.
Now since I don't know whether simple_cst_equal really compares the value of
the attribute, or just some attribute type, it may be that the code does not do
what I hope to achieve.
Any comments how to improve the patch are very welcome.
Best,
Gert
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Subject: [Bug middle-end/70550] -Wuninitialized false positives in OpenMP code
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Apr 6 12:42:24 2016
New Revision: 234779
URL: https://gcc.gnu.org/viewcvs?rev=234779&root=gcc&view=rev
Log:
PR middle-end/70550
* tree.h (OMP_CLAUSE_FIRSTPRIVATE_IMPLICIT): Define.
* gimplify.c (gimplify_adjust_omp_clauses_1): Set it for implicit
firstprivate clauses.
* omp-low.c (lower_send_clauses): Set TREE_NO_WARNING for
OMP_CLAUSE_FIRSTPRIVATE_IMPLICIT !by_ref vars in task contexts.
(lower_omp_target): Set TREE_NO_WARNING for
non-addressable possibly uninitialized vars which are copied into
addressable temporaries or copied for GOMP_MAP_FIRSTPRIVATE_INT.
* c-c++-common/gomp/pr70550-1.c: New test.
* c-c++-common/gomp/pr70550-2.c: New test.
Added:
trunk/gcc/testsuite/c-c++-common/gomp/pr70550-1.c
trunk/gcc/testsuite/c-c++-common/gomp/pr70550-2.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gimplify.c
trunk/gcc/omp-low.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree.h
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Subject: [Bug target/67478] gcc-5.1.0/gcc-5.2.0 undefined symbol std::__once_callable in AIX 6.1
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--- Comment #10 from David Edelsohn <dje at gcc dot gnu.org> ---
The libstdc++ build process was updated to recognize LTS symbols. Please use
GCC 5.3 or later.
>From gcc-bugs-return-521355-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 12:51:42 2016
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Subject: [Bug c++/39159] unhelpful attribute warning on matching declaration after definition
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--- Comment #6 from Gert <gw.fossdev at gmail dot com> ---
I forgot to mention: the patch is against 5.3.0.
>From gcc-bugs-return-521354-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 12:51:08 2016
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From: "acahalan at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/70557] uint64_t zeroing on 32-bit hardware
Date: Wed, 06 Apr 2016 12:51:00 -0000
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--- Comment #5 from Albert Cahalan <acahalan at gmail dot com> ---
This example shows the most simple form of the problem:
unsigned long long ull;
void simple64(void){
ull = 0;
}
NOTE: In the assembly below, I might have missing/excess parentheses. Assembler
syntax varies.
gcc generates:
clr.L %d0
clr.L %d1
move.L %d0,ull
move.L %d1,ull+4
As you can see, two registers are set to the same value. It's better to set
just one, and even better to directly address memory with a clr.L instruction.
Also, given that this code was optimized for size and there was an address
register free, gcc should have put the address of ull into a register and then
used that, preferably with autoincrement addressing.
I'd like to see something like this:
movea.L ull, %a0
clr.L (%a0)+
clr.L (%a0)
When optimizing for speed and registers are not available, maybe this:
clr.L ull
clr.L ull+4
(the code is larger with those 6-byte instructions though, and it might
actually run slower especially considering the small cache)
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Subject: [Bug fortran/55427] [OOP] ICE with class-array-pointer result
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
CC|dominiq at lps dot ens.fr |
--- Comment #4 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> This is fixed on trunk and GNU Fortran (GCC) 5.1.1 20150618 (Red Hat 5.1.1-4).
> Your example even runs correctly!
The ICE is gone with at least 4.9.3, but this leads to wrong code
F
Program received signal SIGSEGV: Segmentation fault - invalid memory reference.
Backtrace for this error:
#0 0x1026dd7b2
#1 0x1026ddf6e
#2 0x7fff8f042529
#3 0x1026d7b38
#4 0x1026d7cd0
Segmentation fault
> I have added Dominique to the CC list in the hope that he can pin down
> better when it was fixed. He seems to maintain the world's largest collection
> of archaic gcc's :-)
Well this fall in one my blind spots!-(
The ICE disappeared between revisions r201266 (2013-07-26, ICE) and r201631
(2013-08-09, wrong code). In this range, I see r201284 (pr57285), r201286
(pr57991), r201294 (pr58009), r201328 and r201329 (pr57530), r201521 (pr57306),
and r201526 (pr57987). I did not look in detail at these PRs, but I think it is
related to/duplicate of pr57530.
The wrong code has been fixed between revisions r219797 (2015-01-17, wrong
code) and r219823 (2015-01-18, expected results). In this range, I see r219798
(pr60334), r219801 (pr61275, pr60357), r219802 (pr64578), r219814 (pr55901),
and r219818 (pr57959). I let you pick the candidate.
> This can be closed once we pin down approximately when it was fixed.
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Subject: [Bug target/70557] uint64_t zeroing on 32-bit hardware
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
In that case it is a backend enhancement request. Backends have many ways how
to deal with this, starting from specialized patterns, or using the lower
subreg passes, using their own splitters etc. and many of the actively
maintained backends handle this right.
>From gcc-bugs-return-521358-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 13:03:54 2016
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From: "baradi09 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/70562] New: User defined assignment does not distinguish between ranks
Date: Wed, 06 Apr 2016 13:03:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70562
Bug ID: 70562
Summary: User defined assignment does not distinguish between
ranks
Product: gcc
Version: 5.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: baradi09 at gmail dot com
Target Milestone: ---
User defined assignment for derived types fails to compile, if the signature of
the various assignments only differ in their rank. The snippet further below
fails to compile with the error message
generic :: assignment(=) => assignScalar, assignArray
1
Error: ‘assignscalar’ and ‘assignarray’ for GENERIC ‘=’ at (1) are ambiguous
although the two interfaces are not ambiguous, as their differ in ther ranks.
Best regards, Bálint
module typedefs
implicit none
type :: tt
integer :: data(2)
contains
procedure :: assignScalar
procedure :: assignArray
generic :: assignment(=) => assignScalar, assignArray
end type tt
contains
subroutine assignScalar(this, other)
class(tt), intent(inout) :: this
class(*), intent(in) :: other
print *, "assignScalar"
end subroutine assignScalar
subroutine assignArray(this, other)
class(tt), intent(inout) :: this
class(*), intent(in) :: other(:)
print *, "assignScalar"
end subroutine assignArray
end module typedefs
>From gcc-bugs-return-521359-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 13:10:49 2016
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Subject: [Bug middle-end/70561] Crash in recog_for_combine_1
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Dominik Vogt <vogt at linux dot vnet.ibm.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #3 from Dominik Vogt <vogt at linux dot vnet.ibm.com> ---
Solved with Uli's help by removing the "parallal" from the
define_insn_and_split.
>From gcc-bugs-return-521360-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 13:20:35 2016
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Subject: [Bug fortran/60853] Failure to disambiguate generic with unlimited polymorphic
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60853
Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |baradi09 at gmail dot com
--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
*** Bug 70562 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-521361-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 13:20:35 2016
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Subject: [Bug fortran/70562] User defined assignment does not distinguish between ranks
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Duplicate of pr60853.
*** This bug has been marked as a duplicate of bug 60853 ***
>From gcc-bugs-return-521362-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 13:24:21 2016
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Subject: [Bug middle-end/70550] -Wuninitialized false positives in OpenMP code
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-521363-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 13:31:26 2016
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Subject: [Bug fortran/55427] [OOP] ICE with class-array-pointer result
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Paul Thomas <pault at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from Paul Thomas <pault at gcc dot gnu.org> ---
>From the ChangeLogs, one of r219801 (pr61275, pr60357) or r219802 (pr64578)
look the most likely to me.
Closing the PR
Paul
>From gcc-bugs-return-521364-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 13:32:30 2016
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Subject: [Bug ipa/70348] [6 Regression][openacc] ICE in visit_ref_for_mod_analysis, at ipa-prop.c
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Thomas Schwinge <tschwinge at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|tschwinge at gcc dot gnu.org |cesar at gcc dot gnu.org
--- Comment #8 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
Cesar is now looking into resolving the OpenACC reduction issues.
>From gcc-bugs-return-521365-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 13:46:54 2016
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Subject: [Bug ipa/70559] Miscompilation of nsTextFormatter.cpp from Firefox with -Os -fomit-frame-pointer
Date: Wed, 06 Apr 2016 13:46:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-06
Known to work| |5.3.0
Ever confirmed|0 |1
Known to fail| |4.8.5, 4.9.3
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed with 4.9.3 and branch head and 4.8.[15].
int dosprintf(SprintfState*, const char16_t*, __va_list_tag*) (struct
SprintfState * aState, const char16_t * aFmt, struct * aAp)
{
..
char16_t c;
..
<bb 328>:
# aFmt_8 = PHI <aFmt_89(D)(334), aFmt_596(327)>
# DEBUG aFmt => aFmt_8
[/home/glandium/gecko/xpcom/glue/nsTextFormatter.cpp : 857:24] aFmt_95 =
aFmt_8 + 2;
[/home/glandium/gecko/xpcom/glue/nsTextFormatter.cpp : 857:24] # DEBUG aFmt
=> aFmt_95
[/home/glandium/gecko/xpcom/glue/nsTextFormatter.cpp : 857:3] c_96 =
[/home/glandium/gecko/xpcom/glue/nsTextFormatter.cpp : 857] *aFmt_8;
[/home/glandium/gecko/xpcom/glue/nsTextFormatter.cpp : 857:3] # DEBUG c =>
c_96
[/home/glandium/gecko/xpcom/glue/nsTextFormatter.cpp : 857:3] if (c_96 != 0)
so everything fine on GIMPLE. GCC 5 is confirmed fixed.
>From gcc-bugs-return-521366-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 13:54:13 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/70519] genmatch fails to compile under gcc-5.2.0 - missing '-lstdc++' .
Date: Wed, 06 Apr 2016 13:54:00 -0000
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--- Comment #4 from Jason Vas Dias <jason.vas.dias at gmail dot com> ---
Thanks for having a look at this, Richard .
Yes, "some weirdness" is definitely going on -
but I'd like to determine precisely which "weirdness".
This occurred when building my new LFS system's system compiler
for the first time, with a GCC-5.2.0 instance built for RHEL-6,
whose installation directories were all mounted with the 'bind'
option ( /usr/lib/gcc/x86_64-redhat-linux/5.2.0 ,
/usr/libexec/gcc/x86_64-redhat-linux/5.2.0 , etc. )
and where $PATH picked up all gcc binaries from a
'bin/' directory containing links like :
gcc -> /${path_to_rhel6_usr_bin}/gcc5.2.0
... etc.
My configure options were :
/usr/os_src/gcc-5.3.0/configure --prefix=/usr --libdir=/usr/lib64
--enable-shared \
--enable-languages=all \
--enable-bootstrap \
--enable-multilib \
--with-cpu-64=haswell \
--with-cpu-32=atom \
--with-arch-64=x86-64 \
--with-tune-64=haswell \
--with-arch-32=i686 \
--with-tune-32=atom \
--enable-targets=all \
--enable-threads=posix \
--enable-lto \
--enable-serial-configure \
--enable-checking=release \
--with-stage1-ldflags='-L/usr/lib64 -L/usr/local/lib64 -L/usr/lib32
-L/usr/local/lib32
-Wl,-R,/usr/lib64:/usr/local/lib64:/usr/lib32:/usr/local/lib32' \
--with-gmp=/usr --with-gmp-lib=/usr/lib64 \
--with-mpfr=/usr --with-mpfr-lib=/usr/lib64 \
--with-mpc=/usr --with-mpc-lib=/usr/lib64 \
--with-isl=/usr --with-isl-lib=/usr/lib64 \
--with-cloog=/usr --with-cloog-lib=/usr/lib64 \
--with-gnu-ld \
--with-gnu-as \
--enable-linker-build-id \
--disable-libunwind-exceptions \
--disable-nls \
--enable-version-specific-runtime-libs \
--enable-__cxa_atexit \
--without-x \
--disable-gtk-cairo \
--with-java-home=/usr/lib/jvm/java-1.5.0-gcj-1.5.0.0/jre \
--enable-libgcj-multifile \
--with-ecj-jar=/usr/share/java/eclipse-ecj.jar \
--with-system-zlib \
--enable-java-home \
--with-arch-directory=x86_64 \
--disable-libjava-multilib \
--build=x86_64-pc-linux-gnu \
--host=x86_64-pc-linux-gnu
I had to radically modify the ./gcc/Makefile of the build directory
to add '-static-libstdc++ -lstdc++' to EVERY executable's link command ,
finally the 'make' completed with 0 exit status, and 'make DESTDIR=... install'
created the installation directory , and the test suite passed (with some
expected failures - details on request).
The translated gcc/Makefile.in produced a gcc/Makefile containing :
LDFLAGS = -static-libstdc++ -static-libgcc
Note: no -lstdc++ - I think the '-static-libstdc++' option on its own
does NOT imply '-lstdc++' - you have to add it to actually link against
libstdc++.a .
So that is what I did , modifying the above lines:
NEEDS_STDCXX = -static-libstdc++ -lstdc++
LDFLAGS = -static-libgcc $(NEEDS_STDCXX)
and I had to add this into many other places where an executable
is being produced and LDFLAGS is not referenced:
...
ALL_LINKERFLAGS = $(ALL_CXXFLAGS) -static-libgcc $(NEEDS_STDCXX)
...
# For stage1 and when cross-compiling use the build libcpp which is
# built with NLS disabled. For stage2+ use the host library and
# its dependencies.
ifeq ($(build_objdir),$(build_libobjdir))
BUILD_CPPLIB = $(build_libobjdir)/libcpp/libcpp.a
else
BUILD_CPPLIB = $(CPPLIB) $(LIBIBERTY)
build/genmatch$(build_exeext): BUILD_LIBDEPS += $(LIBINTL_DEP) $(LIBICONV_DEP)
build/genmatch$(build_exeext): BUILD_LIBS += $(LIBINTL) $(LIBICONV)
$(NEEDS_STDCXX)
endif
...
I suggest making the gcc/Makefile.in / $TOPDIR/{configure.ac,Makefile.am}
add '-lstdc++' every time it writes '-static-libstdc++' to the Makefile ,
eg. $TOPDIR/configure.ac @ line 1376:
# Check whether -static-libstdc++ -static-libgcc is supported.
have_static_libs=no
if test "$GCC" = yes; then
saved_LDFLAGS="$LDFLAGS"
LDFLAGS="$LDFLAGS -static-libstdc++ -static-libgcc"
# ^- add ' -lstdc++' here
@ line 1718:
[stage1_ldflags=
# In stage 1, default to linking libstdc++ and libgcc statically with GCC
# if supported. But if the user explicitly specified the libraries to use,
# trust that they are doing what they want.
if test "$stage1_libs" = "" -a "$have_static_libs" = yes; then
stage1_ldflags="-static-libstdc++ -static-libgcc"
# ^- add ' -lstdc++' here
fi])
@ line 1741:
[poststage1_ldflags=
# In stages 2 and 3, default to linking libstdc++ and libgcc
# statically. But if the user explicitly specified the libraries to
# use, trust that they are doing what they want.
if test "$poststage1_libs" = ""; then
poststage1_ldflags="-static-libstdc++ -static-libgcc"
# ^- add ' -lstdc++' here
fi])
I can't put my finger on the component that is meant to add '-lstdc++'
to the poststage1_ldflags if not above modified lines ATM - what is meant
to be doing this ?
I will try building with the configure.ac so modified next time.
This problem has not occurred building gcc-5.2.0 or previous GCC releases .
>From gcc-bugs-return-521367-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 14:06:40 2016
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From: "cesar at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug ipa/70348] [6 Regression][openacc] ICE in visit_ref_for_mod_analysis, at ipa-prop.c
Date: Wed, 06 Apr 2016 14:06:00 -0000
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--- Comment #9 from cesar at gcc dot gnu.org ---
The patch I posted for PR70289 a couple of days ago also resolves this issue:
https://gcc.gnu.org/ml/gcc-patches/2016-04/msg00202.html
>From gcc-bugs-return-521368-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 14:07:17 2016
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Subject: [Bug target/70559] Miscompilation of nsTextFormatter.cpp from Firefox with -Os -fomit-frame-pointer
Date: Wed, 06 Apr 2016 14:07:00 -0000
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Seems this got fixed (or is dup of) PR64905, r220416 in particular, but you
want r220414 and r220441 too.
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Subject: [Bug bootstrap/70519] genmatch fails to compile under gcc-5.2.0 - missing '-lstdc++' .
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
If you link with g++ or xg++ instead of gcc or xgcc, then the driver is adding
-lstdc++ automatically.
>From gcc-bugs-return-521370-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 14:32:49 2016
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Subject: [Bug fortran/66605] -Wunused-parameter causes internal compiler error with gfortran 5.1.0
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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--- Comment #20 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Fixed on trunk (6.0), closing.
>From gcc-bugs-return-521371-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 14:36:58 2016
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Subject: [Bug c++/68159] Demangler crash (GDB PR 19190)
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Paul Brannan <curlypaul924 at gmail dot com> changed:
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--- Comment #8 from Paul Brannan <curlypaul924 at gmail dot com> ---
I am able to reproduce this segfault with the above instructions on gdb 7.11.
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Subject: [Bug c++/70501] [6 Regression] internal compiler error: in verify_ctor_sanity, at cp/constexpr.c:2249
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--- Comment #3 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
https://gcc.gnu.org/ml/gcc-patches/2016-04/msg00191.html
but read the thread for why that's not the best patch. Continuing ...
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Subject: [Bug c++/70543] [6 Regression] wrong non-const error for enable_if and constexpr function
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70543
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-06
CC| |jakub at gcc dot gnu.org,
| |jason at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The #c0 changed behavior with r226652.
And the #c2 looks like PR70528.
>From gcc-bugs-return-521374-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 15:46:38 2016
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Subject: [Bug fortran/47040] Make error message for empty array constructor more helpful/correct
Date: Wed, 06 Apr 2016 15:46:00 -0000
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--- Comment #6 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Patch submitted at https://gcc.gnu.org/ml/fortran/2016-04/msg00024.html.
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Subject: [Bug fortran/52393] I/O: "READ format" statement with parenthesed default-char-expr
Date: Wed, 06 Apr 2016 16:11:00 -0000
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--- Comment #5 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Note that the following test compiles with gfortran from at least 4.8 up to
trunk (6.0)
PROGRAM ReadMeTwo
IMPLICIT NONE
CHARACTER(10) :: var
READ '('//'A)', var
PRINT *, var
END PROGRAM ReadMeTwo
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Subject: [Bug bootstrap/70519] genmatch fails to compile under gcc-5.2.0 - missing '-lstdc++' .
Date: Wed, 06 Apr 2016 16:35:00 -0000
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--- Comment #6 from Jason Vas Dias <jason.vas.dias at gmail dot com> ---
Yes, Jakub, thanks, I know :
> If you link with g++ or xg++ instead of gcc or xgcc, then the driver is adding
> -lstdc++ automatically.
But it is not ME linking, it is the gcc-5.3.0 Makefile.in / configure.ac
scripts .
It seems to me on cursory inspection of these huge scripts that neither of them
are explicitly adding '-lstdc' anywhere onto the link lines for xg++ links, nor
to LDFLAGS or ALL_LINKERFLAGS or BUILD_LDFLAGS or any link line containing
LDFLAGS
, as shown by this grep in the unmodified GCC 5.3.0 source directory:
[root@localhost:/usr/os_src/gcc-5.3.0 [4360] 16:23:17 #:8!:4399]
$ egrep '(LINKER|LD)FLAGS' Makefile.in Makefile.def Makefile.tpl
gcc/Makefile.in | egrep -i stdc\\+\\+\|stdc\[xp\]+
[root@localhost:/usr/os_src/gcc-5.3.0 $
ie. no references to 'stdc++' or stdcxx (case insensitive) in any line
containing
LDFLAGS or LINKER in any make script .
So it is very difficult to find the exact line of code that is meant to be
adding the '-lstdc++' and somehow failed to do so in my case !
Is it meant to be added to LDFLAGS during the stage2 gcc configure using xg++
as the compiler ($CC) ? A search of the huge configure.ac scripts yields no
results :
$ egrep '(LINKER|LD)FLAGS' configure.ac gcc/configure.ac | egrep -i
stdc\\+\\+\|stdc\[xp]+
configure.ac: LDFLAGS="$LDFLAGS -static-libstdc++ -static-libgcc"
$
So how are the build scripts meant to be adding '-lstdc++' to the link lines
of executables produced by the stage2 xg++ ? This is far from clear.
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From: "yves.vandriessche at intel dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/63336] cilkplus array notation ICE in find_rank
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Yves Vandriessche <yves.vandriessche at intel dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |yves.vandriessche at intel dot com
--- Comment #8 from Yves Vandriessche <yves.vandriessche at intel dot com> ---
reconfirming for g++ (Ubuntu 5.2.1-22ubuntu2) 5.2.1 20151010
compiling with -std-gnu++11 -fcilkplus
I did find a workaround: I do not get the error if I avoid using the array
notation extension on a member. Using a local variable that takes on the
pointer value of the member compiles perfectly.
> struct Test {
> int nrows;
> int * rows;
> Test(int _nrows, int * in_rows): nrows(_nrows) {
> rows = new int[nrows + 1];
>
> // internal compiler error: in find_rank, at c-family/array-notation-common.c:244
> rows[0:nrows+1] = 0;
>
> // // workaround
> // int * _rows = rows;
> // _rows[0:nrows+1] = 0;
> }
> };
>
> int main() {
> Test t{1024*1024, nullptr};
> }
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Subject: [Bug c++/70563] New: SFINEA fails when trying invalid template instantiation
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Bug ID: 70563
Summary: SFINEA fails when trying invalid template
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Product: gcc
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vogt@fermi03:~/temp2> cat test_SFINAE_with_template_binding.ii
# 1 "test_SFINAE_with_template_binding.cc"
# 1 "<built-in>"
# 1 "<command-line>"
# 1 "/usr/include/stdc-predef.h" 1 3 4
# 1 "<command-line>" 2
# 1 "test_SFINAE_with_template_binding.cc"
template<typename... T> using void_t = void;
template<typename T> struct TemporaryBindObject
{
};
struct MyTrueType
{
static constexpr bool value = true;
};
struct MyFalseType
{
static constexpr bool value = false;
};
template<template<typename...> class Dest> struct TestValidBind
{
template<typename T, typename = void_t<>> struct toTypesOf : MyFalseType
{};
template<template<typename...> class Src, typename... Ts> struct
toTypesOf<Src<Ts...>, void_t<Dest<Ts...,float>>> : MyTrueType
{};
};
template<typename T> struct OneParamStruct
{
};
template<typename T1, typename T2> struct TwoParamStruct
{
};
using tmp = TemporaryBindObject<int>;
int main()
{
bool value1 =
TestValidBind<TwoParamStruct>::toTypesOf<TemporaryBindObject<int>>::value;
bool value2 =
TestValidBind<OneParamStruct>::toTypesOf<TemporaryBindObject<int>>::value;
}
vogt@fermi03:~/temp2> g++-5 -std=c++11 test_SFINAE_with_template_binding.ii
test_SFINAE_with_template_binding.cc: In function ‘int main()’:
test_SFINAE_with_template_binding.cc:41:16: error: incomplete type
‘TestValidBind<OneParamStruct>::toTypesOf<TemporaryBindObject<int> >’ used in
nested name specifier
bool value2 =
TestValidBind<OneParamStruct>::toTypesOf<TemporaryBindObject<int>>::value;
^
vogt@fermi03:~/temp2> g++-5 --version
g++-5 (SUSE Linux) 5.3.1 20160301 [gcc-5-branch revision 233849]
Copyright (C) 2015 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
The example works with clang. I am not a standard expert to decide who is
right. Actually, a simplified version works with gcc, however I don't see the
reason why this shouldn't, see http://stackoverflow.com/a/36411945/5085250
Same problem with
vogt@fermi03:~/temp2> g++-6 --version
g++-6 (SUSE Linux) 6.0.0 20160324 (experimental) [trunk revision 234449]
Copyright (C) 2016 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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Subject: [Bug rtl-optimization/70398] [6 Regression] gcc.dg/vect/slp-multitypes-9.c FAILs with -fno-tree-loop-optimize -fno-tree-ter
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--- Comment #3 from Vladimir Makarov <vmakarov at gcc dot gnu.org> ---
Author: vmakarov
Date: Wed Apr 6 16:48:36 2016
New Revision: 234792
URL: https://gcc.gnu.org/viewcvs?rev=234792&root=gcc&view=rev
Log:
2016-04-06 Vladimir Makarov <vmakarov@redhat.com>
PR rtl-optimization/70398
* lra-constraints.c (process_address_1): Check zero scale and code
for reloading with zero scale.
2016-04-06 Vladimir Makarov <vmakarov@redhat.com>
PR rtl-optimization/70398
* testsuite/gcc.target/aarch64/pr70398.c: New.
Added:
trunk/gcc/testsuite/gcc.target/aarch64/pr70398.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/lra-constraints.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/66487] sanitizer/warnings for lifetime DSE
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Jan Hubicka <hubicka at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-06
Summary|[6 Regression] Firefox |sanitizer/warnings for
|segfault with LTO enabled |lifetime DSE
Ever confirmed|0 |1
Severity|normal |enhancement
--- Comment #19 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Martin, I suppose the sanitizer bits can be tracked as enhancement and not
regression. It is a firefox bug so I suppose we can declare this a
non-regression.
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Subject: [Bug c++/70029] [6 Regression] ICE with C++11 and -flto
Date: Wed, 06 Apr 2016 16:58:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70029
--- Comment #7 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Hmm, both options sounds quite involved. Perhaps for stage4 we can simply drop
the sanity check and add yet another FIXME to the verifier? Alias.c is
relatively robust about walking to main variants so I can't think of wrong code
issue caused by this.
Honza
Index: tree.c
===================================================================
--- tree.c (revision 234761)
+++ tree.c (working copy)
@@ -13584,7 +13584,8 @@ verify_type (const_tree t)
debug_tree (ct);
error_found = true;
}
- if (TYPE_MAIN_VARIANT (t) == t && ct && TYPE_MAIN_VARIANT (ct) != ct)
+ /* FIXME: this is volated by C++ frontend as discussed in PR70029. */
+ if (TYPE_MAIN_VARIANT (t) == t && ct && TYPE_MAIN_VARIANT (ct) != ct && 0)
{
error ("TYPE_CANONICAL of main variant is not main variant");
debug_tree (ct);
Index: testsuite/g++.dg/torture/pr70029.C
===================================================================
--- testsuite/g++.dg/torture/pr70029.C (revision 0)
+++ testsuite/g++.dg/torture/pr70029.C (working copy)
@@ -0,0 +1,11 @@
+/* { dg-do compile } */
+/* { dg-options "-std=c++11 -g -flto" } */
+/* { dg-require-effective-target lto } */
+struct A
+{
+ A();
+ int foo() && __attribute__ ((__warn_unused_result__)) { return 0; }
+};
+
+A a;
+
>From gcc-bugs-return-521382-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 16:59:19 2016
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From: "jason.vas.dias at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/70519] genmatch fails to compile under gcc-5.2.0 - missing '-lstdc++' .
Date: Wed, 06 Apr 2016 16:59:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70519
--- Comment #7 from Jason Vas Dias <jason.vas.dias at gmail dot com> ---
So since I've produced a working Stage3 compiler in the build directory, './',
'./prev-gcc' should be the directory containing the Stage2 gcc build, and
it does in my case, with a config.log :
$ grep '^LDFLAGS=' prev-gcc/config.log
LDFLAGS='-static-libstdc++ -static-libgcc '
Now I think that this command should produce the output :
$ grep '^LDFLAGS=' prev-gcc/config.log
LDFLAGS='-static-libstdc++ -static-libgcc -lstdc++'
because we know that all the executables are produced with xg++
given the '-nostdlib' option, and all C++ executables should be
linked against libstdc++ .
My question is simply why isn't the missing '-lstdc++' there ?
Next question: where is the code that is meant to be adding it somehow ?
>From gcc-bugs-return-521383-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 17:07:14 2016
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Subject: [Bug bootstrap/70519] genmatch fails to compile under gcc-5.2.0 - missing '-lstdc++' .
Date: Wed, 06 Apr 2016 17:07:00 -0000
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--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Where do you see -nostdlib being used? I see it neither in your #c0, nor in
#c1.
Looking at my buildlog, -nostdlib is used to link only some libraries, like
libstdc++.so.6 itself, or libvtv, libsanitizer libraries, libcc1/libcc1plugin,
libcilkrts, libgcj, libgcj_bc, libgij, libjvm, libgcj-tools, but certainly not
when linking build/*, or gcov, or cc1, ...
>From gcc-bugs-return-521384-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 17:12:41 2016
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From: "jason.vas.dias at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/70519] genmatch fails to compile under gcc-5.2.0 - missing '-lstdc++' .
Date: Wed, 06 Apr 2016 17:12:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70519
--- Comment #9 from Jason Vas Dias <jason.vas.dias at gmail dot com> ---
(In reply to Jakub Jelinek from comment #8)
> Where do you see -nostdlib being used? I see it neither in your #c0, nor in
> #c1.
> Looking at my buildlog, -nostdlib is used to link only some libraries, like
> libstdc++.so.6 itself, or libvtv, libsanitizer libraries,
> libcc1/libcc1plugin, libcilkrts, libgcj, libgcj_bc, libgij, libjvm,
> libgcj-tools, but certainly not when linking build/*, or gcov, or cc1, ...
Yes, sorry, -nostdlib is not being used explicitly - but we seem to be
getting the same effect with xg++ .
The problem is then that the stage2 xg++ is not adding -lstd++ automatically,
and the scripts are not adding it to the stage2 configure's LDFLAGS - I think
they should be, or the part of them that is meant to be doing this has failed
to do so in my case .
Any pointers as to where precisely in the build script code to look for where
-lstdc++ should be being added to the stage2 build LDFLAGS , or is it that
xg++ should have been adding -lstdc++ if required , but wasn't ?
Some clarification on that last point would be greatly appreciated.
>From gcc-bugs-return-521385-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 17:23:09 2016
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From: "rcc.dark at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/70564] New: Problem with std::experimental::not_fn
Date: Wed, 06 Apr 2016 17:23:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70564
Bug ID: 70564
Summary: Problem with std::experimental::not_fn
Product: gcc
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Hi all. The following code does not compile under MinGW-64 GCC 5.2.0 / Linux-64
GCC 5.3.1:
#include <experimental/functional>
#include <array>
int main( )
{
auto lambda = [](auto i) {
return i == 5;
};
std::array<int, 100> arr;
std::find_if(arr.begin( ), arr.end( ), std::experimental::not_fn(lambda));
}
Inside std::find_if, an object of the _Iter_Pred class is created:
_Iter_pred(_Predicate __pred)
: _M_pred(__pred)
{ }
which calls _Not_fn<PRED>(_Not_fn<PRED>&) since __pred is an lvalue. However,
between these _Not_fn constructors:
template<typename _Fn2>
explicit
_Not_fn(_Fn2&& __fn) : _M_fn(std::forward<_Fn2>(__fn)) { }
_Not_fn(const _Not_fn& __fn) = default;
_Not_fn(_Not_fn&& __fn) = default;
the first one wins and triggers an error.
>From gcc-bugs-return-521386-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 17:24:36 2016
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/70519] genmatch fails to compile under gcc-5.2.0 - missing '-lstdc++' .
Date: Wed, 06 Apr 2016 17:24:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70519
--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Jason Vas Dias from comment #9)
> (In reply to Jakub Jelinek from comment #8)
> > Where do you see -nostdlib being used? I see it neither in your #c0, nor in
> > #c1.
> > Looking at my buildlog, -nostdlib is used to link only some libraries, like
> > libstdc++.so.6 itself, or libvtv, libsanitizer libraries,
> > libcc1/libcc1plugin, libcilkrts, libgcj, libgcj_bc, libgij, libjvm,
> > libgcj-tools, but certainly not when linking build/*, or gcov, or cc1, ...
>
> Yes, sorry, -nostdlib is not being used explicitly - but we seem to be
> getting the same effect with xg++ .
Only you seem to be getting that effect, for everybody else it works just fine.
So the question is why it doesn't work for you.
>From gcc-bugs-return-521387-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 17:39:01 2016
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From: "yves.vandriessche at intel dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70565] New: ICE at gimplify.c:8832 (cilkplus array extension)
Date: Wed, 06 Apr 2016 17:39:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70565
Bug ID: 70565
Summary: ICE at gimplify.c:8832 (cilkplus array extension)
Product: gcc
Version: 5.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Created attachment 38203
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38203&action=edit
test case producing ICE in gimplify_expr, at gimplify.c:8832
using: gcc (Ubuntu 5.2.1-22ubuntu2) 5.2.1 20151010
running on: Ubuntu-5.10
Attached file produces the following ICE
> test.cpp:11:18: internal compiler error: in gimplify_expr, at gimplify.c:8832
with the guilty code segment in question being:
> cilk_for ( int row = 0; row < nrows; row++ ) {
> int row_nnz = nrows/2;
> int col_offsets[row_nnz];
> col_offsets[:] = __sec_implicit_index(0);
> }
Note that I do not get an ICE when using a regular 'for' instead of the above
'cilk_for'.
>From gcc-bugs-return-521388-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 17:44:07 2016
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Subject: [Bug c++/70565] ICE at gimplify.c:8832 (cilkplus array extension)
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70565
--- Comment #1 from Yves Vandriessche <yves.vandriessche at intel dot com> ---
Additionally, the same internal compile error is produced when substituting:
> cilk_for ( int row = 0; row < nrows; row++ ) {
with
>#pragma omp parallel scheduler(dynamic, 256)
> for ( int row = 0; row < nrows; row++ ) {
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Subject: [Bug preprocessor/69391] [5/6 Regression] Incorrect __LINE__ expansion with -ftrack-macro-expansion=0 on g++5.2
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69391
--- Comment #6 from Richard Henderson <rth at gcc dot gnu.org> ---
Author: rth
Date: Wed Apr 6 18:35:16 2016
New Revision: 234794
URL: https://gcc.gnu.org/viewcvs?rev=234794&root=gcc&view=rev
Log:
PR preprocessor/61817
PR preprocessor/69391
* internal.h (_cpp_builtin_macro_text): Update decl.
* macro.c (_cpp_builtin_macro_text): Accept location for __LINE__.
(builtin_macro): Accept a second location for __LINE__.
(enter_macro_context): Compute both virtual and real expansion
locations for the macro.
* gcc.dg/pr61817-1.c: New test.
* gcc.dg/pr61817-2.c: New test.
* gcc.dg/pr69391-1.c: New test.
* gcc.dg/pr69391-2.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/pr61817-1.c
trunk/gcc/testsuite/gcc.dg/pr61817-2.c
trunk/gcc/testsuite/gcc.dg/pr69391-1.c
trunk/gcc/testsuite/gcc.dg/pr69391-2.c
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/libcpp/ChangeLog
trunk/libcpp/internal.h
trunk/libcpp/macro.c
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Subject: [Bug preprocessor/61817] Inconsistent location of tokens in the expansion list of a built-in macro
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61817
--- Comment #4 from Richard Henderson <rth at gcc dot gnu.org> ---
Author: rth
Date: Wed Apr 6 18:35:16 2016
New Revision: 234794
URL: https://gcc.gnu.org/viewcvs?rev=234794&root=gcc&view=rev
Log:
PR preprocessor/61817
PR preprocessor/69391
* internal.h (_cpp_builtin_macro_text): Update decl.
* macro.c (_cpp_builtin_macro_text): Accept location for __LINE__.
(builtin_macro): Accept a second location for __LINE__.
(enter_macro_context): Compute both virtual and real expansion
locations for the macro.
* gcc.dg/pr61817-1.c: New test.
* gcc.dg/pr61817-2.c: New test.
* gcc.dg/pr69391-1.c: New test.
* gcc.dg/pr69391-2.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/pr61817-1.c
trunk/gcc/testsuite/gcc.dg/pr61817-2.c
trunk/gcc/testsuite/gcc.dg/pr69391-1.c
trunk/gcc/testsuite/gcc.dg/pr69391-2.c
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/libcpp/ChangeLog
trunk/libcpp/internal.h
trunk/libcpp/macro.c
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Richard Henderson <rth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from Richard Henderson <rth at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug preprocessor/60723] Line directives with incorrect system header flag
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Bug 60723 depends on bug 61817, which changed state.
Bug 61817 Summary: Inconsistent location of tokens in the expansion list of a built-in macro
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61817
What |Removed |Added
----------------------------------------------------------------------------
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Resolution|--- |FIXED
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Subject: [Bug preprocessor/69391] [5 Regression] Incorrect __LINE__ expansion with -ftrack-macro-expansion=0 on g++5.2
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Richard Henderson <rth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |NEW
Summary|[5/6 Regression] Incorrect |[5 Regression] Incorrect
|__LINE__ expansion with |__LINE__ expansion with
|-ftrack-macro-expansion=0 |-ftrack-macro-expansion=0
|on g++5.2 |on g++5.2
--- Comment #7 from Richard Henderson <rth at gcc dot gnu.org> ---
Fixed for gcc6.
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From: "dan at reactivated dot net" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/70566] New: Bad ARM code generated for evaluating unsigned int bitfield value
Date: Wed, 06 Apr 2016 19:36:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70566
Bug ID: 70566
Summary: Bad ARM code generated for evaluating unsigned int
bitfield value
Product: gcc
Version: 5.3.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: dan at reactivated dot net
Target Milestone: ---
Created attachment 38204
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38204&action=edit
main.c test case source
I have reproduced on gcc-4.9.2, gcc-4.9.3, and gcc-5.3.1 in Debian.
System type: ODROID-U2 (Exynos4412) ARMv7
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/arm-linux-gnueabihf/5/lto-wrapper
Target: arm-linux-gnueabihf
Configured with: ../src/configure -v --with-pkgversion='Debian 5.3.1-13'
--with-bugurl=file:///usr/share/doc/gcc-5/README.Bugs
--enable-languages=c,ada,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-5 --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-libitm
--disable-libquadmath --enable-plugin --with-system-zlib
--disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo
--with-java-home=/usr/lib/jvm/java-1.5.0-gcj-5-armhf/jre --enable-java-home
--with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-5-armhf
--with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-5-armhf
--with-arch-directory=arm --with-ecj-jar=/usr/share/java/eclipse-ecj.jar
--enable-objc-gc --enable-multiarch --disable-sjlj-exceptions
--with-arch=armv7-a --with-fpu=vfpv3-d16 --with-float=hard --with-mode=thumb
--enable-checking=release --build=arm-linux-gnueabihf
--host=arm-linux-gnueabihf --target=arm-linux-gnueabihf
Thread model: posix
gcc version 5.3.1 20160323 (Debian 5.3.1-13)
With a struct set up with bitfield values like this:
struct mystruct {
unsigned int uid_set : 1;
unsigned int is_loaded : 1;
unsigned int nonexistent : 1;
};
The following C code is compiled to bad ARMv7 assembly under certain
circumstances at -O2:
if (!user->is_loaded)
set_is_loaded (user, 1);
The resultant bad assembly is:
14: 7803 ldrb r3, [r0, #0]
16: 079b lsls r3, r3, #30
18: d400 bmi.n 1c <on_get_all_finished+0x8>
1a: d000 beq.n 1e <on_get_all_finished+0xa>
1c: 4770 bx lr
1e: e7ef b.n 0 <set_is_loaded.part.0>
In the bitfield, uid_set is bit 0 and is_loaded is bit 1.
The assembly loads the bitfield value and shifts left to have the value of
is_loaded at bit 31. So the "bmi" instruction makes perfect sense: if is_loaded
is set, jump to some code that is not going to call set_is_loaded.
The following "beq" instruction is bad. Here we have is_loaded at bit 31, but
we also have uid_set at bit 30. So the value of uid_set is clearly going to
influence the code behaviour here: if uid_set is 1, we will not call
set_is_loaded.
This issue originates from freedesktop's accountsservice where I noticed the
incorrect runtime behaviour.
I am attaching a minimal test case which you can compile with:
gcc -O2 -g -c main.c -o out.o
gcc -c other.c -o other.o
gcc other.o out.o -o prog
Run with:
./prog 0
./prog 1
The argument controls the value of uid_set. It should have no effect on the
runtime behaviour, but you'll notice that myfunc is only called when the arg is
0.
Unfortunately I couldn't figure out how to slim down the test case into a
single file, as that resulted in different (working) asm being generated.
I'm also attaching the preprocessed version of main.c.
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Subject: [Bug c/70566] Bad ARM code generated for evaluating unsigned int bitfield value
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--- Comment #1 from Daniel Drake <dan at reactivated dot net> ---
Created attachment 38205
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38205&action=edit
other.c test case source
>From gcc-bugs-return-521396-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 19:38:15 2016
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From: "dan at reactivated dot net" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/70566] Bad ARM code generated for evaluating unsigned int bitfield value
Date: Wed, 06 Apr 2016 19:38:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70566
--- Comment #2 from Daniel Drake <dan at reactivated dot net> ---
Created attachment 38206
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38206&action=edit
main.i preprocessed output
>From gcc-bugs-return-521397-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 20:29:33 2016
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From: "ian_harvey at bigpond dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/52393] I/O: "READ format" statement with parenthesed default-char-expr
Date: Wed, 06 Apr 2016 20:29:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52393
--- Comment #6 from Ian Harvey <ian_harvey at bigpond dot com> ---
The code in #5 is missing the initial parenthesised expression that exposes the
flaw in parsing logic - the left hand operand of the string concatenation needs
to be `('(')`, and not just the string literal.
>From gcc-bugs-return-521398-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 20:48:47 2016
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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/52393] I/O: "READ format" statement with parenthesed default-char-expr
Date: Wed, 06 Apr 2016 20:48:00 -0000
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--- Comment #7 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> The code in #5 is missing the initial parenthesised expression that exposes
> the flaw in parsing logic - the left hand operand of the string concatenation
> needs to be `('(')`, and not just the string literal.
Indeed! Note that gfortran accepts '(' // ('A)'), or ('(' // 'A)'). AFAICT the
problem occurs only when the first substring is enclosed in parentheses.
>From gcc-bugs-return-521399-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 21:40:44 2016
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Subject: [Bug fortran/52884] double precision constants promoted to 16 byte by -fdefault-real-8
Date: Wed, 06 Apr 2016 21:40:00 -0000
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--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
I am planning to submit the following patch
--- ../_clean/gcc/fortran/invoke.texi 2016-03-13 09:07:16.000000000 +0100
+++ gcc/fortran/invoke.texi 2016-04-06 20:44:26.000000000 +0200
@@ -361,9 +361,10 @@ it does not promote variables with expli
@opindex @code{fdefault-double-8}
Set the @code{DOUBLE PRECISION} type to an 8 byte wide type. Do nothing if
this
is already the default. If @option{-fdefault-real-8} is given,
-@code{DOUBLE PRECISION} would instead be promoted to 16 bytes if possible, and
+@code{DOUBLE PRECISION} would instead be promoted to 16 bytes if possible,
+as well as double real constants like @code{1.d0}, and
@option{-fdefault-double-8} can be used to prevent this. The kind of real
-constants like @code{1.d0} will not be changed by @option{-fdefault-real-8}
+constants like @code{1.0_8} will not be changed by @option{-fdefault-real-8}
though, so also @option{-fdefault-double-8} does not affect it.
@item -finteger-4-integer-8
>From gcc-bugs-return-521400-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 21:43:59 2016
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Subject: [Bug fortran/67039] Documentation of pseudorandom number intrinsics is incorrect
Date: Wed, 06 Apr 2016 21:43:00 -0000
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--- Comment #6 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
I am planning to submit the following patch
--- ../_clean/gcc/fortran/intrinsic.texi 2016-01-04 19:51:09.000000000
+0100
+++ gcc/fortran/intrinsic.texi 2016-04-06 17:15:01.000000000 +0200
@@ -12628,10 +12628,12 @@ Does not return anything.
See @code{RAND} and @code{IRAND} for examples.
@item @emph{Notes}:
-The Fortran 2003 standard specifies the intrinsic @code{RANDOM_SEED} to
-initialize the pseudo-random numbers generator and @code{RANDOM_NUMBER}
-to generate pseudo-random numbers. Please note that in
-GNU Fortran, these two sets of intrinsics (@code{RAND},
+The Fortran standard specifies the intrinsic subroutines
+@code{RANDOM_SEED} to initialize the pseudo-random numbers
+generator and @code{RANDOM_NUMBER} to generate pseudo-random numbers.
+These subroutines should be used in new codes.
+
+Please note that in GNU Fortran, these two sets of intrinsics (@code{RAND},
@code{IRAND} and @code{SRAND} on the one hand, @code{RANDOM_NUMBER} and
@code{RANDOM_SEED} on the other hand) access two independent
pseudo-random number generators.
>From gcc-bugs-return-521401-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 23:03:06 2016
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Subject: [Bug c++/70567] New: internal compiler error: in retrieve_specialization, at cp/pt.c:1020
Date: Wed, 06 Apr 2016 23:03:00 -0000
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Bug ID: 70567
Summary: internal compiler error: in retrieve_specialization,
at cp/pt.c:1020
Product: gcc
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1. cat y.C:
template < class > struct allocator_traits;
template < class > class allocator;
template < class _Ty > struct allocator_traits <allocator < _Ty > >
{
typedef _Ty value_type;
typedef value_type *pointer;
template < class _Other > using rebind_traits =
allocator_traits < allocator < _Other > >;
};
int test()
{
allocator_traits<allocator<int> >::rebind_traits<void*>::pointer pt;
}
2. ./xgcc -std=c++11 -S -B. y.c
y.C: In substitution of 'template<class _Other> using rebind_traits =
allocator_traits<allocator<_Ty> > [with _Other = int]':
y.C:12:58: required from here
y.C:8:46: internal compiler error: in retrieve_specialization, at cp/pt.c:1020
allocator_traits < allocator < _Other > >;
^
>From gcc-bugs-return-521402-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 23:04:01 2016
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Subject: [Bug c++/70567] internal compiler error: in retrieve_specialization, at cp/pt.c:1020
Date: Wed, 06 Apr 2016 23:04:00 -0000
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--- Comment #1 from baoshan <pangbw at gmail dot com> ---
This issue is seen from 4.8 to 5.0.
>From gcc-bugs-return-521403-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 06 23:08:07 2016
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From: "ppalka at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/70436] [4.9/5/6 Regression] -Wparentheses missing ambiguous else warning
Date: Wed, 06 Apr 2016 23:08:00 -0000
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--- Comment #13 from Patrick Palka <ppalka at gcc dot gnu.org> ---
Author: ppalka
Date: Wed Apr 6 23:07:21 2016
New Revision: 234801
URL: https://gcc.gnu.org/viewcvs?rev=234801&root=gcc&view=rev
Log:
Fix new -Wparentheses warnings encountered during bootstrap
gcc/ChangeLog:
PR c/70436
* gimplify.c (gimplify_omp_ordered): Add explicit braces to
resolve a future -Wparentheses warning.
* omp-low.c (scan_sharing_clauses): Likewise.
* tree-parloops.c (eliminate_local_variables): Likewise.
gcc/cp/ChangeLog:
PR c/70436
* cp-tree.h (FOR_EACH_CLONE): Restructure macro to avoid
potentially generating a future -Wparentheses warning in its
callers.
gcc/fortran/ChangeLog:
PR c/70436
* openmp.c (gfc_find_omp_udr): Add explicit braces to resolve a
future -Wparentheses warning.
gcc/testsuite/ChangeLog:
PR c/70436
* g++.dg/plugin/pragma_plugin.c (handle_pragma_sayhello): Add
explicit braces to resolve a future -Wparentheses warning.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/cp-tree.h
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/openmp.c
trunk/gcc/gimplify.c
trunk/gcc/omp-low.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/g++.dg/plugin/pragma_plugin.c
trunk/gcc/tree-parloops.c
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From: "ppalka at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/70436] [4.9/5/6 Regression] -Wparentheses missing ambiguous else warning
Date: Wed, 06 Apr 2016 23:11:00 -0000
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--- Comment #14 from Patrick Palka <ppalka at gcc dot gnu.org> ---
Author: ppalka
Date: Wed Apr 6 23:10:14 2016
New Revision: 234802
URL: https://gcc.gnu.org/viewcvs?rev=234802&root=gcc&view=rev
Log:
Fix C++ side of PR c/70436 (missing -Wparentheses warnings)
gcc/cp/ChangeLog:
PR c/70436
* parser.c (cp_parser_iteration_statement): New parameter IF_P.
Pass it through to cp_parser_already_scoped_statement.
(cp_parser_already_scoped_statement): New parameter IF_P. Pass
it through to cp_parser_statement.
(cp_parser_statement): Pass IF_P through to
cp_parser_iteration_statement.
(cp_parser_pragma): Adjust call to
cp_parser_iteration_statement.
gcc/testsuite/ChangeLog:
PR c/70436
* g++.dg/warn/Wparentheses-29.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/warn/Wparentheses-29.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/cp/parser.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-521405-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 00:36:03 2016
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Subject: [Bug tree-optimization/68953] [6 Regression] [graphite] Wrong code w/ -O[12] -floop-nest-optimize
Date: Thu, 07 Apr 2016 00:36:00 -0000
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--- Comment #5 from vries at gcc dot gnu.org ---
Created attachment 38207
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38207&action=edit
demonstrator patch
In add_pdr_constraints, for the EXTRADIM=0 case we have:
...
accesses: { S_4[i1, i2] -> [1, 1 + i1] }
subscript_sizes: { [1, i1] : i1 >= 0 and i1 <= 3 }
intersection: { S_4[i1, i2] -> [1, 1 + i1] : i1 >= -1 and i1 <= 2 }
...
but for the EXTRADIM=1 case, we have:
...
accesses: { S_4[i1, i2] -> [1, 0, 1 + i1] }
subscript_sizes: { [1, i1, 0] : i1 >= 0 and i1 <= 3 }
intersection: { S_4[-1, i2] -> [1, 0, 0] }
...
Actually, the accesses are ordered:
[alias set, last subscript, first subscript]
and the subscript sizes are ordered:
[alias set range, first subscript range, last subscript range]
and that explains why intersection gives unintended results.
The patch changes the order of the subscript functions (that was the easiest
for me to implement) to:
[alias set, first subscript, last subscript]
and we get a more reasonable intersection (similar to the EXTRADIM=0 case):
...
accesses: { S_4[i1, i2] -> [1, 1 + i1, 0] }
subscript_sizes: { [1, i1, 0] : i1 >= 0 and i1 <= 3 }
intersection: { S_4[i1, i2] -> [1, 1 + i1, 0] : i1 >= -1 and i1 <= 2 }
...
and consequently, correct dependences, and the wrong-code issue is fixed.
Atm though I've got no clue about the overall effect of this change, or what
the actual fix should look like.
>From gcc-bugs-return-521406-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 00:46:24 2016
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Subject: [Bug tree-optimization/68953] [6 Regression] [graphite] Wrong code w/ -O[12] -floop-nest-optimize
Date: Thu, 07 Apr 2016 00:46:00 -0000
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--- Comment #6 from vries at gcc dot gnu.org ---
(In reply to vries from comment #5)
> The patch changes the order of the subscript functions
Oops, that's accesses, actually.
> (that was the easiest
> for me to implement) to:
> [alias set, first subscript, last subscript]
>From gcc-bugs-return-521407-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 01:16:38 2016
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Subject: [Bug target/70568] New: PowerPC64: union of floating and fixed doesn't use POWER8 GPR/VSR moves
Date: Thu, 07 Apr 2016 01:16:00 -0000
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Bug ID: 70568
Summary: PowerPC64: union of floating and fixed doesn't use
POWER8 GPR/VSR moves
Product: gcc
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The following test case from both glibc and openlibm:
typedef union
{
float value;
/* FIXME: Assumes 32 bit int. */
unsigned int word;
} ieee_float_shape_type;
/* Get a 32 bit int from a float. */
#define GET_FLOAT_WORD(i,d) \
do { \
ieee_float_shape_type gf_u; \
gf_u.value = (d); \
(i) = gf_u.word; \
} while (0)
int foo(float d)
{
int i;
GET_FLOAT_WORD(i, d);
return i;
}
Uses the stack to do the conversion:
foo:
stfs 1,-16(1)
ori 2,2,0
lwa 3,-16(1)
LLVM does what I expect:
foo:
xscvdpspn 0, 1
xxsldwi 0, 0, 0, 3
mfvsrwz 3, 0
extsw 3, 3
>From gcc-bugs-return-521408-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 01:56:29 2016
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Subject: [Bug target/70568] PowerPC64: union of floating and fixed doesn't use POWER8 GPR/VSR moves
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-07
Ever confirmed|0 |1
--- Comment #1 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Confirmed. Still better is
xscvdpspn 0,1
mfvsrd 3,0
srdi 3,3,32
>From gcc-bugs-return-521409-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 02:02:43 2016
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Subject: [Bug target/70568] PowerPC64: union of floating and fixed doesn't use POWER8 GPR/VSR moves
Date: Thu, 07 Apr 2016 02:02:00 -0000
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--- Comment #2 from Segher Boessenkool <segher at gcc dot gnu.org> ---
sradi, that is.
>From gcc-bugs-return-521410-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 03:18:59 2016
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From: "mario.silva.costa at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/70569] New: configure: error: source directory already configured; run "make distclean" there first
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Bug ID: 70569
Summary: configure: error: source directory already configured;
run "make distclean" there first
Product: gcc
Version: 6.0
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Priority: P3
Component: libstdc++
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Created attachment 38208
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38208&action=edit
libstdc++-v3 config.log
on ubuntu 14.04 64 bit.
./configure --disable-multilib && make
fails to compile.
mkdir -p -- x86_64-pc-linux-gnu/libstdc++-v3
Checking multilib configuration for libstdc++-v3...
Configuring stage 1 in x86_64-pc-linux-gnu/libstdc++-v3
configure: creating cache ./config.cache
checking build system type... x86_64-pc-linux-gnu
checking host system type... x86_64-pc-linux-gnu
checking target system type... x86_64-pc-linux-gnu
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for a thread-safe mkdir -p... /bin/mkdir -p
checking for gawk... gawk
checking whether make sets $(MAKE)... yes
configure: error: source directory already configured; run "make distclean"
there first
make[2]: *** [configure-stage1-target-libstdc++-v3] Error 1
make[2]: Leaving directory `/home/atritoman/gcc'
make[1]: *** [stage1-bubble] Error 2
make[1]: Leaving directory `/home/atritoman/gcc'
make: *** [all] Error 2
>From gcc-bugs-return-521411-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 03:25:35 2016
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Subject: [Bug bootstrap/70569] configure: error: source directory already configured; run "make distclean" there first
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|libstdc++ |bootstrap
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Most people don't build in the src directory and it is not supported at least
as far as I know.
Please read the installation directions for more details.
>From gcc-bugs-return-521412-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 03:33:25 2016
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From: "ndkrempel at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70570] New: Assembler error "symbol already defined" from nested lambdas and function-static variable
Date: Thu, 07 Apr 2016 03:33:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70570
Bug ID: 70570
Summary: Assembler error "symbol already defined" from nested
lambdas and function-static variable
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: ndkrempel at gmail dot com
Target Milestone: ---
Created attachment 38209
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38209&action=edit
Minimal test case, compile with g++ -std=c++14
Referring to a function-static variable from within both of two nested lambda
functions (the outer one being generic/polymorphic) causes an assembler error
(symbol already defined).
Minimal test case attached, tested on g++ 5.3.0.
>From gcc-bugs-return-521413-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 05:19:26 2016
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From: "yselkowi at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/51749] Including <algorithm> pollutes global namespace
Date: Thu, 07 Apr 2016 05:19:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=51749
--- Comment #32 from Yaakov Selkowitz <yselkowi at redhat dot com> ---
In an effort to enable C99-in-C++ functionality on newlib-based targets
(including Cygwin and RTEMS), we just overhauled our feature test macros to be
functionally compatible with glibc's. Ignoring the lack of missing long double
real and complex math functions (which are anyways guarded separately), we were
able to thereby enable the rest of _GLIBCXX_USE_C99* functionality without the
-D_GNU_SOURCE hack.
Our approach was (in glibc terms):
* enable __USE_ISOC99 in features.h if defined(__cplusplus), for C99-in-TR1;
* enable __USE_ISOC11 in features.h if __cplusplus >= 201103L, for *quick_exit
in C++11.
* define the _POSIX_* capability macros in <unistd.h> regardless of
__USE_POSIX*, for gthr-posix.h.
Note that the public -D_ISOC*_SOURCE macros were NOT defined in g++.
However, we don't need ftello64 (Cygwin's off_t is naturally 64-bit) nor do we
have the locale_t group of functions, which according to the Linux man-pages
are SUSv4. These functions may be best served by their own special guards.
>From gcc-bugs-return-521414-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 05:43:08 2016
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From: "su at cs dot ucdavis.edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70571] New: ICE on valid code on x86_64-linux-gnu in verify_ctor_sanity, at cp/constexpr.c:2259
Date: Thu, 07 Apr 2016 05:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70571
Bug ID: 70571
Summary: ICE on valid code on x86_64-linux-gnu in
verify_ctor_sanity, at cp/constexpr.c:2259
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: su at cs dot ucdavis.edu
Target Milestone: ---
The following code causes an ICE when compiled with the current GCC trunk on
x86_64-linux-gnu in both 32-bit and 64-bit modes.
This is a regression from 5.3.x.
$ g++-trunk -v
Using built-in specs.
COLLECT_GCC=g++-trunk
COLLECT_LTO_WRAPPER=/usr/local/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/6.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto
--prefix=/usr/local/gcc-trunk --disable-bootstrap
Thread model: posix
gcc version 6.0.0 20160406 (experimental) [trunk revision 234771] (GCC)
$
$ g++-5.3 -c small.cpp
$
$ g++-trunk -c small.cpp
small.cpp: In function ‘void foo(vec, vec, int)’:
small.cpp:4:14: internal compiler error: in verify_ctor_sanity, at
cp/constexpr.c:2348
x = (z == y);
^
0x845da7 verify_ctor_sanity
../../gcc-source-trunk/gcc/cp/constexpr.c:2347
0x85314f cxx_eval_bare_aggregate
../../gcc-source-trunk/gcc/cp/constexpr.c:2382
0x84ddb0 cxx_eval_constant_expression
../../gcc-source-trunk/gcc/cp/constexpr.c:3862
0x85192d cxx_eval_binary_expression
../../gcc-source-trunk/gcc/cp/constexpr.c:1716
0x84d414 cxx_eval_constant_expression
../../gcc-source-trunk/gcc/cp/constexpr.c:3795
0x854639 cxx_eval_outermost_constant_expr
../../gcc-source-trunk/gcc/cp/constexpr.c:4110
0x855c8b potential_constant_expression_1
../../gcc-source-trunk/gcc/cp/constexpr.c:5093
0x741eb4 cp_parser_constant_expression
../../gcc-source-trunk/gcc/cp/parser.c:9334
0x742614 cp_parser_initializer_clause
../../gcc-source-trunk/gcc/cp/parser.c:20793
0x741c91 cp_parser_assignment_expression
../../gcc-source-trunk/gcc/cp/parser.c:9074
0x744329 cp_parser_expression
../../gcc-source-trunk/gcc/cp/parser.c:9222
0x744a9f cp_parser_expression_statement
../../gcc-source-trunk/gcc/cp/parser.c:10683
0x7327eb cp_parser_statement
../../gcc-source-trunk/gcc/cp/parser.c:10534
0x73349c cp_parser_statement_seq_opt
../../gcc-source-trunk/gcc/cp/parser.c:10806
0x73358f cp_parser_compound_statement
../../gcc-source-trunk/gcc/cp/parser.c:10760
0x751dcf cp_parser_function_body
../../gcc-source-trunk/gcc/cp/parser.c:20653
0x751dcf cp_parser_ctor_initializer_opt_and_function_body
../../gcc-source-trunk/gcc/cp/parser.c:20689
0x752871 cp_parser_function_definition_after_declarator
../../gcc-source-trunk/gcc/cp/parser.c:25351
0x753467 cp_parser_function_definition_from_specifiers_and_declarator
../../gcc-source-trunk/gcc/cp/parser.c:25263
0x753467 cp_parser_init_declarator
../../gcc-source-trunk/gcc/cp/parser.c:18429
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
$
--------------------------------------------------------------
typedef int vec __attribute__ ((vector_size (sizeof (int))));
void foo (vec x, vec y, int z)
{
x = (z == y);
}
>From gcc-bugs-return-521415-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 06:21:30 2016
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From: "su at cs dot ucdavis.edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70572] New: ICE on code with decltype (auto) on x86_64-linux-gnu in digest_init_r, at cp/typeck2.c:1103 with -std=c++14
Date: Thu, 07 Apr 2016 06:21:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70572
Bug ID: 70572
Summary: ICE on code with decltype (auto) on x86_64-linux-gnu
in digest_init_r, at cp/typeck2.c:1103 with -std=c++14
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: su at cs dot ucdavis.edu
Target Milestone: ---
The following code causes an ICE when compiled with the current GCC trunk on
x86_64-linux-gnu in both 32-bit and 64-bit modes.
It also affects 4.9.x and later, which support -std=c++14.
$ g++-trunk -v
Using built-in specs.
COLLECT_GCC=g++-trunk
COLLECT_LTO_WRAPPER=/usr/local/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/6.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto
--prefix=/usr/local/gcc-trunk --disable-bootstrap
Thread model: posix
gcc version 6.0.0 20160406 (experimental) [trunk revision 234771] (GCC)
$
$ g++-trunk -c -std=c++14 small.cpp
small.cpp: In function ‘int foo()’:
small.cpp:3:23: internal compiler error: in digest_init_r, at cp/typeck2.c:1103
decltype (auto) a = foo; // OK: decltype (auto) a = &foo;
^~~
0x6cd59c digest_init_r
../../gcc-source-trunk/gcc/cp/typeck2.c:1099
0x6cf2ea digest_init_flags
../../gcc-source-trunk/gcc/cp/typeck2.c:1168
0x6cf2ea store_init_value(tree_node*, tree_node*, vec<tree_node*, va_gc,
vl_embed>**, int)
../../gcc-source-trunk/gcc/cp/typeck2.c:802
0x62fbf4 check_initializer
../../gcc-source-trunk/gcc/cp/decl.c:6162
0x659865 cp_finish_decl(tree_node*, tree_node*, bool, tree_node*, int)
../../gcc-source-trunk/gcc/cp/decl.c:6810
0x752f9f cp_parser_init_declarator
../../gcc-source-trunk/gcc/cp/parser.c:18658
0x753750 cp_parser_simple_declaration
../../gcc-source-trunk/gcc/cp/parser.c:12379
0x753a61 cp_parser_block_declaration
../../gcc-source-trunk/gcc/cp/parser.c:12248
0x7544b8 cp_parser_declaration_statement
../../gcc-source-trunk/gcc/cp/parser.c:11860
0x732b7b cp_parser_statement
../../gcc-source-trunk/gcc/cp/parser.c:10528
0x73349c cp_parser_statement_seq_opt
../../gcc-source-trunk/gcc/cp/parser.c:10806
0x73358f cp_parser_compound_statement
../../gcc-source-trunk/gcc/cp/parser.c:10760
0x751dcf cp_parser_function_body
../../gcc-source-trunk/gcc/cp/parser.c:20653
0x751dcf cp_parser_ctor_initializer_opt_and_function_body
../../gcc-source-trunk/gcc/cp/parser.c:20689
0x752871 cp_parser_function_definition_after_declarator
../../gcc-source-trunk/gcc/cp/parser.c:25351
0x753467 cp_parser_function_definition_from_specifiers_and_declarator
../../gcc-source-trunk/gcc/cp/parser.c:25263
0x753467 cp_parser_init_declarator
../../gcc-source-trunk/gcc/cp/parser.c:18429
0x753750 cp_parser_simple_declaration
../../gcc-source-trunk/gcc/cp/parser.c:12379
0x753a61 cp_parser_block_declaration
../../gcc-source-trunk/gcc/cp/parser.c:12248
0x75c5d0 cp_parser_declaration
../../gcc-source-trunk/gcc/cp/parser.c:12145
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
$
--------------------------------------------------------------
int foo ()
{
decltype (auto) a = foo; // OK: decltype (auto) a = &foo;
return 0;
}
>From gcc-bugs-return-521416-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 06:35:06 2016
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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++/61198] Crash when selecting specializations through aliases.
Date: Thu, 07 Apr 2016 06:35:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61198
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |pangbw at gmail dot com
--- Comment #12 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
*** Bug 70567 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-521417-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 06:35:06 2016
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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++/70567] internal compiler error: in retrieve_specialization, at cp/pt.c:1020
Date: Thu, 07 Apr 2016 06:35:00 -0000
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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|--- |DUPLICATE
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
This got fixed with r218955, and the ICE started with r181118 when template
aliases have been introduced.
In r234337 it has been backported to 4.9, so it is fixed on all currently
supported releases.
*** This bug has been marked as a duplicate of bug 61198 ***
>From gcc-bugs-return-521418-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 07:11:25 2016
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Subject: [Bug c++/70571] [6 Regression] ICE on valid code on x86_64-linux-gnu in verify_ctor_sanity, at cp/constexpr.c:2259
Date: Thu, 07 Apr 2016 07:11:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70571
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-07
CC| |jakub at gcc dot gnu.org,
| |nathan at gcc dot gnu.org
Target Milestone|--- |6.0
Summary|ICE on valid code on |[6 Regression] ICE on valid
|x86_64-linux-gnu in |code on x86_64-linux-gnu in
|verify_ctor_sanity, at |verify_ctor_sanity, at
|cp/constexpr.c:2259 |cp/constexpr.c:2259
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r229128, most likely dup of PR70501.
>From gcc-bugs-return-521419-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 07:11:30 2016
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Subject: [Bug testsuite/70516] [4.9/5/6 Regression] Regtesting acats hangs on x86_64-apple-darwin15.4
Date: Thu, 07 Apr 2016 07:11:00 -0000
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--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Can you bisect it? There aren't that many changes that could affect
> anything at all.
The problem is non-deterministic: it occurs less than once every two tests. So
r234234 is the first revision for which I saw it, but it does not mean that it
could not have occurred before it. The main change in the reported range was
the update of Tcl to 8.6 from 8.5, but it does not seem to be the culprit.
> Any Ada processes (compiler or some testcase) hang?
AFAICT no, but there is at least one expect process hanging. If I kill it,
regtesting completes after eventually running some gnat tests. Before killing
the expect process I see
[Book15] gcc/build_c% lf gcc/testsuite/ada/acats-parallel/
1/ 108/ 117/ 126/ 135/ 144/ 153/ 162/ 171/ 180/ 19/ 199/ 207/
216/ 225/ 25/ 34/ 43/ 52/ 61/ 70/ 8/ 89/ 98/
10/ 109/ 118/ 127/ 136/ 145/ 154/ 163/ 172/ 181/ 190/ 2/ 208/
217/ 226/ 26/ 35/ 44/ 53/ 62/ 71/ 80/ 9/ 99/
100/ 11/ 119/ 128/ 137/ 146/ 155/ 164/ 173/ 182/ 191/ 20/ 209/
218/ 227/ 27/ 36/ 45/ 54/ 63/ 72/ 81/ 90/ finished
101/ 110/ 12/ 129/ 138/ 147/ 156/ 165/ 174/ 183/ 192/ 200/ 21/
219/ 228/ 28/ 37/ 46/ 55/ 64/ 73/ 82/ 91/
102/ 111/ 120/ 13/ 139/ 148/ 157/ 166/ 175/ 184/ 193/ 201/ 210/
22/ 229/ 29/ 38/ 47/ 56/ 65/ 74/ 83/ 92/
103/ 112/ 121/ 130/ 14/ 149/ 158/ 167/ 176/ 185/ 194/ 202/ 211/
220/ 23/ 3/ 39/ 48/ 57/ 66/ 75/ 84/ 93/
104/ 113/ 122/ 131/ 140/ 15/ 159/ 168/ 177/ 186/ 195/ 203/ 212/
221/ 230/ 30/ 4/ 49/ 58/ 67/ 76/ 85/ 94/
105/ 114/ 123/ 132/ 141/ 150/ 16/ 169/ 178/ 187/ 196/ 204/ 213/
222/ 231/ 31/ 40/ 5/ 59/ 68/ 77/ 86/ 95/
106/ 115/ 124/ 133/ 142/ 151/ 160/ 17/ 179/ 188/ 197/ 205/ 214/
223/ 232/ 32/ 41/ 50/ 6/ 69/ 78/ 87/ 96/
107/ 116/ 125/ 134/ 143/ 152/ 161/ 170/ 18/ 189/ 198/ 206/ 215/
224/ 24/ 33/ 42/ 51/ 60/ 7/ 79/ 88/ 97/
after killing it, the gcc/testsuite/ada/acats-parallel directory is gone.
Killing the last make gives something such as
/opt/gcc/logs/check_a-234697p25.log:/bin/sh: line 30: 3681 Killed: 9
make check-acats1 check-acats2 check-acats3 check-acats4 check-acats5
check-acats6 check-acats7 check-acats8 check-acats9 check-acats10 check-acats11
check-acats12 check-acats13 check-acats14 check-acats15 check-acats16
check-acats17 check-acats18 check-acats19 check-acats20 check-acats21
check-acats22 check-acats23 check-acats24 check-acats25 check-acats26
check-acats27 check-acats28 check-acats29 check-acats30 check-acats31
check-acats32 check-acats33 check-acats34 check-acats35 check-acats36
check-acats37 check-acats38 check-acats39 check-acats40 check-acats41
check-acats42 check-acats43 check-acats44 check-acats45 check-acats46
check-acats47 check-acats48 check-acats49 check-acats50 check-acats51
check-acats52 check-acats53 check-acats54 check-acats55 check-acats56
check-acats57 check-acats58 check-acats59 check-acats60 check-acats61
check-acats62 check-acats63 check-acats64 check-acats65 check-acats66
check-acats67 check-acats68 check-acats69 check-acats70 check-acats71
check-acats72 check-acats73 check-acats74 check-acats75 check-acats76
check-acats77 check-acats78 check-acats79 check-acats80 check-acats81
check-acats82 check-acats83 check-acats84 check-acats85 check-acats86
check-acats87 check-acats88 check-acats89 check-acats90 check-acats91
check-acats92 check-acats93 check-acats94 check-acats95 check-acats96
check-acats97 check-acats98 check-acats99 check-acats100 check-acats101
check-acats102 check-acats103 check-acats104 check-acats105 check-acats106
check-acats107 check-acats108 check-acats109 check-acats110 check-acats111
check-acats112 check-acats113 check-acats114 check-acats115 check-acats116
check-acats117 check-acats118 check-acats119 check-acats120 check-acats121
check-acats122 check-acats123 check-acats124 check-acats125 check-acats126
check-acats127 check-acats128
>From gcc-bugs-return-521420-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 07:16:18 2016
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Subject: [Bug c++/70572] [4.9/5/6 Regression] ICE on code with decltype (auto) on x86_64-linux-gnu in digest_init_r, at cp/typeck2.c:1103 with -std=c++14
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-07
CC| |jakub at gcc dot gnu.org,
| |jason at gcc dot gnu.org
Target Milestone|--- |4.9.4
Summary|ICE on code with decltype |[4.9/5/6 Regression] ICE on
|(auto) on x86_64-linux-gnu |code with decltype (auto)
|in digest_init_r, at |on x86_64-linux-gnu in
|cp/typeck2.c:1103 with |digest_init_r, at
|-std=c++14 |cp/typeck2.c:1103 with
| |-std=c++14
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
ICE started with r197248, before that it has been rejected with
pr70572.C: In function ‘int foo()’:
pr70572.C:3:4: error: expected primary-expression before ‘decltype’
decltype (auto) a = foo;
^
pr70572.C:3:4: error: expected ‘;’ before ‘decltype’
>From gcc-bugs-return-521421-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 07:20:14 2016
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Subject: [Bug testsuite/70516] [4.9/5/6 Regression] Regtesting acats hangs on x86_64-apple-darwin15.4
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Perhaps just tcl bug on your platform then?
Do you have some revision where you can reliably not reproduce the hang (say
with 100 invocations)? Otherwise I kind of don't understand the Regression
marking.
>From gcc-bugs-return-521422-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 07:20:26 2016
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Subject: [Bug sanitizer/70573] New: FAIL: c-c++-common/asan/halt_on_error-1.c -O* execution test x86_64-apple-darwin15
Date: Thu, 07 Apr 2016 07:20:00 -0000
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Bug ID: 70573
Summary: FAIL: c-c++-common/asan/halt_on_error-1.c -O*
execution test x86_64-apple-darwin15
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: sanitizer
Assignee: unassigned at gcc dot gnu.org
Reporter: dominiq at lps dot ens.fr
CC: dodji at gcc dot gnu.org, dvyukov at gcc dot gnu.org,
howarth.at.gcc.testresults at gmail dot com,
iains at gcc dot gnu.org, jakub at gcc dot gnu.org, kcc at gcc dot gnu.org
Target Milestone: ---
Host: x86_64-apple-darwin15
Target: x86_64-apple-darwin15
Build: x86_64-apple-darwin15
The test c-c++-common/asan/halt_on_error-1.c fails on darwin at run time.
AFAICT the test has never succeeded.
>From gcc-bugs-return-521423-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 07:31:26 2016
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Subject: [Bug testsuite/70516] [4.9/5/6 Regression] Regtesting acats hangs on x86_64-apple-darwin15.4
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--- Comment #5 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Perhaps just tcl bug on your platform then?
> Do you have some revision where you can reliably not reproduce the hang
> (say with 100 invocations)? Otherwise I kind of don't understand
> the Regression marking.
Regtesting all languages on my machine takes between 4 and 5 hours (at -j8), so
I never test any revision more than once. I typically do a couple regtestings
every day and I have never seen any hanging before March 16 for trunk.
>From gcc-bugs-return-521424-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 08:10:52 2016
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Subject: [Bug sanitizer/70573] FAIL: c-c++-common/asan/halt_on_error-1.c -O* execution test x86_64-apple-darwin15
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Yury Gribov <y.gribov at samsung dot com> changed:
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--- Comment #1 from Yury Gribov <y.gribov at samsung dot com> ---
Could you provide details of the fail?
>From gcc-bugs-return-521425-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 08:16:06 2016
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Subject: [Bug sanitizer/70573] FAIL: c-c++-common/asan/halt_on_error-1.c -O* execution test x86_64-apple-darwin15
Date: Thu, 07 Apr 2016 08:16:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-07
Ever confirmed|0 |1
--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Could you provide details of the fail?
The best I can do from the little I understand is
[Book15] f90/bug% gcc6 -fsanitize-recover=address
/opt/gcc/_clean/gcc/testsuite/c-c++-common/asan/halt_on_error-1.c
[Book15] f90/bug% ./a.out
Abort
[Book15] f90/bug% printenv ASAN_OPTIONS
[Book15] f90/bug% setenv ASAN_OPTIONS "halt_on_error=false"
[Book15] f90/bug% ./a.out
Abort
[Book15] f90/bug% printenv ASAN_OPTIONS
halt_on_error=false
>From gcc-bugs-return-521426-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 08:16:32 2016
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/66487] sanitizer/warnings for lifetime DSE
Date: Thu, 07 Apr 2016 08:16:00 -0000
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--- Comment #20 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Jan Hubicka from comment #19)
> Martin, I suppose the sanitizer bits can be tracked as enhancement and not
> regression. It is a firefox bug so I suppose we can declare this a
> non-regression.
Sure, maybe I would return to support of MSAN in GCC 7.
>From gcc-bugs-return-521427-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 08:18:07 2016
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Subject: [Bug testsuite/70516] [4.9/5/6 Regression] Regtesting acats hangs on x86_64-apple-darwin15.4
Date: Thu, 07 Apr 2016 08:18:00 -0000
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The thing is that there were no changes in the acats testsuite in the last 1.5
years, and if you say there is no ada process hanging around, it is unlikely
gcc/ada changes affect it either.
>From gcc-bugs-return-521428-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 08:31:27 2016
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Subject: [Bug target/70566] [4.9/5/6 Regression] Bad ARM code generated for evaluating unsigned int bitfield value
Date: Thu, 07 Apr 2016 08:31:00 -0000
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ktkachov at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |arm
Status|UNCONFIRMED |NEW
Known to work| |4.8.5
Keywords| |wrong-code
Last reconfirmed| |2016-04-07
Component|c |target
CC| |ktkachov at gcc dot gnu.org
Ever confirmed|0 |1
Summary|Bad ARM code generated for |[4.9/5/6 Regression] Bad
|evaluating unsigned int |ARM code generated for
|bitfield value |evaluating unsigned int
| |bitfield value
Target Milestone|--- |4.9.5
Known to fail| |4.9.4, 5.3.1, 6.0
--- Comment #3 from ktkachov at gcc dot gnu.org ---
Confirmed on active branches.
I get MYFUNC printed only when running ./prog 0.
At -O0 or with GCC 4.8 I get MYFUNC printed when
running both "./prog 0" and "prog 1".
So this looks like a regression from 4.9 onwards.
>From gcc-bugs-return-521429-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 09:01:17 2016
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Subject: [Bug target/70566] [4.9/5/6 Regression] Bad ARM code generated for evaluating unsigned int bitfield value
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ktkachov at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|unassigned at gcc dot gnu.org |ktkachov at gcc dot gnu.org
--- Comment #4 from ktkachov at gcc dot gnu.org ---
The culprit seems to be the peephole in thumb2.md at line 1539.
Adding -fno-peephole2 gives the correct behaviour.
>From gcc-bugs-return-521430-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 09:11:09 2016
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Subject: [Bug target/70566] [4.9/5/6 Regression] Bad ARM code generated for evaluating unsigned int bitfield value
Date: Thu, 07 Apr 2016 09:11:00 -0000
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ktkachov at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
CC| |rearnsha at arm dot com
--- Comment #5 from ktkachov at gcc dot gnu.org ---
I think the peephole to transform the 1-bit zero_extract + compare-with-zero
into an lsls (from a tst-immediate) is not valid for positions other than zero
(i.e. when the shift would be by 31). But that case should already be handled
by the peephole below it at line 1567 in thumb2.md.
So I propose we just delete the one at line 1539.
Richard, what do you think?
>From gcc-bugs-return-521431-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 09:25:55 2016
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Subject: [Bug sanitizer/70573] FAIL: c-c++-common/asan/halt_on_error-1.c -O* execution test x86_64-apple-darwin15
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--- Comment #3 from Yury Gribov <y.gribov at samsung dot com> ---
Problem is that we don't have access to Darwin hardware. Perhaps you could get
a failing stacktrace via gdb?
>From gcc-bugs-return-521432-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 09:39:36 2016
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Subject: [Bug target/70566] [4.9/5/6 Regression] Bad ARM code generated for evaluating unsigned int bitfield value
Date: Thu, 07 Apr 2016 09:39:00 -0000
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--- Comment #6 from ktkachov at gcc dot gnu.org ---
Ah, on second glance the peephole looks correct in itself, but the second
branch following the bmi uses an incorrect condition code.
So we have:
tst r3, #2
bne .L3
beq .L6
being transformed into:
ldrb r3, [r0] @ zero_extendqisi2
lsls r3, r3, #30
bmi .L3
beq .L6
The beq needs to be updated to be the opposite of bmi. That is, bpl
>From gcc-bugs-return-521433-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 09:44:50 2016
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--- Comment #4 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Problem is that we don't have access to Darwin hardware. Perhaps you could
> get a failing stacktrace via gdb?
(lldb) run
Process 79186 launched:
'/Users/dominiq/Documents/Fortran/g95bench/win/f90/bug/a.out' (x86_64)
Process 79186 stopped
* thread #1: tid = 0x29c6013, 0x00007fff9225df06
libsystem_kernel.dylib`__pthread_kill + 10, queue = 'com.apple.main-thread',
stop reason = signal SIGABRT
frame #0: 0x00007fff9225df06 libsystem_kernel.dylib`__pthread_kill + 10
libsystem_kernel.dylib`__pthread_kill:
-> 0x7fff9225df06 <+10>: jae 0x7fff9225df10 ; <+20>
0x7fff9225df08 <+12>: movq %rax, %rdi
0x7fff9225df0b <+15>: jmp 0x7fff922587cd ; cerror_nocancel
0x7fff9225df10 <+20>: retq
(lldb) bt
* thread #1: tid = 0x29c6013, 0x00007fff9225df06
libsystem_kernel.dylib`__pthread_kill + 10, queue = 'com.apple.main-thread',
stop reason = signal SIGABRT
* frame #0: 0x00007fff9225df06 libsystem_kernel.dylib`__pthread_kill + 10
frame #1: 0x00007fff96b934ec libsystem_pthread.dylib`pthread_kill + 90
frame #2: 0x00007fff880276e7 libsystem_c.dylib`abort + 129
frame #3: 0x00007fff8802785e libsystem_c.dylib`abort_report_np + 181
frame #4: 0x00007fff8804da14 libsystem_c.dylib`__chk_fail + 48
frame #5: 0x00007fff8804d9e4 libsystem_c.dylib`__chk_fail_overflow + 16
frame #6: 0x00007fff8804da7a libsystem_c.dylib`__memset_chk + 37
frame #7: 0x0000000100000f4f a.out`main + 42 at halt_on_error-1.c:12
frame #8: 0x00007fff924055ad libdyld.dylib`start + 1
>From gcc-bugs-return-521434-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 09:46:48 2016
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Subject: [Bug target/70566] [4.9/5/6 Regression] Bad ARM code generated for evaluating unsigned int bitfield value
Date: Thu, 07 Apr 2016 09:46:00 -0000
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--- Comment #7 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
(In reply to ktkachov from comment #6)
> Ah, on second glance the peephole looks correct in itself, but the second
> branch following the bmi uses an incorrect condition code.
> So we have:
> tst r3, #2
> bne .L3
> beq .L6
>
> being transformed into:
> ldrb r3, [r0] @ zero_extendqisi2
> lsls r3, r3, #30
> bmi .L3
> beq .L6
>
>
> The beq needs to be updated to be the opposite of bmi. That is, bpl
Sounds like the peephole is missing a reg-dead check on the condition code
value.
>From gcc-bugs-return-521435-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 09:50:36 2016
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Subject: [Bug target/70566] [4.9/5/6 Regression] Bad ARM code generated for evaluating unsigned int bitfield value
Date: Thu, 07 Apr 2016 09:50:00 -0000
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--- Comment #8 from ktkachov at gcc dot gnu.org ---
(In reply to Richard Earnshaw from comment #7)
> (In reply to ktkachov from comment #6)
> > Ah, on second glance the peephole looks correct in itself, but the second
> > branch following the bmi uses an incorrect condition code.
> > So we have:
> > tst r3, #2
> > bne .L3
> > beq .L6
> >
> > being transformed into:
> > ldrb r3, [r0] @ zero_extendqisi2
> > lsls r3, r3, #30
> > bmi .L3
> > beq .L6
> >
> >
> > The beq needs to be updated to be the opposite of bmi. That is, bpl
>
> Sounds like the peephole is missing a reg-dead check on the condition code
> value.
Yep, that seems to do the trick. I'll test a patch.
Thanks Richard.
>From gcc-bugs-return-521436-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 11:00:14 2016
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Subject: [Bug libstdc++/70564] Problem with std::experimental::not_fn
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----------------------------------------------------------------------------
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Rodrigo from comment #0)
> which calls _Not_fn<PRED>(_Not_fn<PRED>&) since __pred is an lvalue.
> However, between these _Not_fn constructors:
>
> template<typename _Fn2>
> explicit
> _Not_fn(_Fn2&& __fn) : _M_fn(std::forward<_Fn2>(__fn)) { }
>
> _Not_fn(const _Not_fn& __fn) = default;
> _Not_fn(_Not_fn&& __fn) = default;
>
> the first one wins and triggers an error.
Oops, that constructor needs to be constrained.
>From gcc-bugs-return-521437-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 11:02:06 2016
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Subject: [Bug libstdc++/51749] Including <algorithm> pollutes global namespace
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--- Comment #33 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Thanks for the info. The locale_t functionality is the main thing that will
need work, but it's good to know you were able to get everything else working
well.
>From gcc-bugs-return-521438-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 11:07:15 2016
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Subject: [Bug target/70566] [4.9/5/6 Regression] Bad ARM code generated for evaluating unsigned int bitfield value
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>From gcc-bugs-return-521439-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 11:44:18 2016
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Subject: [Bug libgomp/69414] [OpenACC] "!$acc update self" does not provide expected result
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--- Comment #5 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
Author: tschwinge
Date: Thu Apr 7 11:43:30 2016
New Revision: 234806
URL: https://gcc.gnu.org/viewcvs?rev=234806&root=gcc&view=rev
Log:
[PR libgomp/69414] Fix handling of subarrays with update directive
libgomp/
Backport trunk r234428:
2016-03-23 James Norris <jnorris@codesourcery.com>
Daichi Fukuoka <dc-fukuoka@sgi.com>
PR libgomp/69414
* oacc-mem.c (delete_copyout, update_dev_host): Fix device address.
* testsuite/libgomp.oacc-c-c++-common/update-1.c: Additional tests.
* testsuite/libgomp.oacc-c-c++-common/update-1-2.c: Likewise.
* testsuite/libgomp.oacc-fortran/update-1.f90: New file.
Added:
branches/gcc-5-branch/libgomp/testsuite/libgomp.oacc-fortran/update-1.f90
Modified:
branches/gcc-5-branch/libgomp/ChangeLog
branches/gcc-5-branch/libgomp/oacc-mem.c
branches/gcc-5-branch/libgomp/testsuite/libgomp.oacc-c-c++-common/update-1-2.c
branches/gcc-5-branch/libgomp/testsuite/libgomp.oacc-c-c++-common/update-1.c
>From gcc-bugs-return-521440-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 11:47:45 2016
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Subject: [Bug libgomp/69414] [OpenACC] "!$acc update self" does not provide expected result
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Thomas Schwinge <tschwinge at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Version|5.3.0 |5.0
Resolution|--- |FIXED
Assignee|jnorris at gcc dot gnu.org |tschwinge at gcc dot gnu.org
Target Milestone|--- |5.4
--- Comment #6 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
In r234806 now also fixed on gcc-5-branch.
>From gcc-bugs-return-521441-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 12:04:08 2016
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Subject: [Bug target/70574] New: [5/6 Regression] wrong code with -mavx2, read of partially initialised stack variable
Date: Thu, 07 Apr 2016 12:04:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70574
Bug ID: 70574
Summary: [5/6 Regression] wrong code with -mavx2, read of
partially initialised stack variable
Product: gcc
Version: unknown
Status: UNCONFIRMED
Keywords: wrong-code
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: zsojka at seznam dot cz
Target Milestone: ---
Target: x86_64-pc-linux-gnu
Created attachment 38210
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38210&action=edit
reduced testcase
Output:
$ gcc -O -fPIC -frerun-cse-after-loop -fno-tree-ccp -mcmodel=medium -mavx2
testcase.c
$ valgrind -q ./a.out
==1282== Conditional jump or move depends on uninitialised value(s)
==1282== at 0x400653: main (in /home/zso/gcc-bug/89/a.out)
==1282==
Aborted
The problem most likely is (intel sytax):
...
foo:
...
mov DWORD PTR -52[rbp], edi # %sfp, u64_0
mov QWORD PTR -64[rbp], rcx # %sfp, u128_1
1) mov BYTE PTR -48[rbp], -1 # %sfp,
vpxor xmm2, xmm2, xmm2 # tmp120
2) vpinsrb xmm2, xmm2, BYTE PTR -48[rbp], 1 # tmp120, tmp120, %sfp,
vmovd xmm4, DWORD PTR -64[rbp] # tmp124, %sfp
mov eax, 0 # tmp126,
vpinsrb xmm4, xmm4, eax, 1 # tmp125, tmp124, tmp126,
3) vmovd xmm3, DWORD PTR -48[rbp] # tmp129, %sfp
...
1 stores a "byte" -1, 2 reads "byte" -1, 3 reads "dword" -1 (3 bytes of
garbage)
$ gcc -v
Using built-in specs.
COLLECT_GCC=/repo/gcc-trunk/binary-latest/bin/x86_64-pc-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-234794-checking-yes-rtl-df-nographite/bin/../libexec/gcc/x86_64-pc-linux-gnu/6.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++
--enable-checking=yes,rtl,df --without-cloog --without-ppl --without-isl
--disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-234794-checking-yes-rtl-df-nographite
Thread model: posix
gcc version 6.0.0 20160406 (experimental) (GCC)
>From gcc-bugs-return-521442-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 12:14:00 2016
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Subject: [Bug target/64386] ICE: in extract_insn, at recog.c:2327 (unrecognizable insn) with -mavx512bw
Date: Thu, 07 Apr 2016 12:13:00 -0000
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Kirill Yukhin <kyukhin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #4 from Kirill Yukhin <kyukhin at gcc dot gnu.org> ---
Done.
>From gcc-bugs-return-521443-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 12:25:45 2016
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From: "valeryweber at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/70575] New: write syntax check
Date: Thu, 07 Apr 2016 12:25:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70575
Bug ID: 70575
Summary: write syntax check
Product: gcc
Version: 6.0
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Assignee: unassigned at gcc dot gnu.org
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Hi All
Should gfortran complain about the syntax of the following code?
v
gcc version 6.0.0 20160330 (experimental) (GCC)
cat t.f90
subroutine foo()
write(*,*) , 1
end subroutine foo
>From gcc-bugs-return-521444-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 13:16:16 2016
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70574] [5/6 Regression] wrong code with -mavx2, read of partially initialised stack variable
Date: Thu, 07 Apr 2016 13:16:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-07
CC| |jakub at gcc dot gnu.org,
| |vmakarov at gcc dot gnu.org
Target Milestone|--- |5.4
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r210824.
>From gcc-bugs-return-521446-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 13:50:44 2016
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Subject: [Bug tree-optimization/70577] New: prefetch.c scan-tree-dump-times aprefetch failures
Date: Thu, 07 Apr 2016 13:50:00 -0000
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Bug ID: 70577
Summary: prefetch.c scan-tree-dump-times aprefetch failures
Product: gcc
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PASS: gcc.dg/tree-ssa/prefetch-5.c (test for excess errors)
FAIL: gcc.dg/tree-ssa/prefetch-5.c scan-tree-dump-times aprefetch "Issued
prefetch" 2
FAIL: gcc.dg/tree-ssa/prefetch-5.c scan-tree-dump-times aprefetch "Not
prefetching" 1
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Subject: [Bug c++/70576] New: G++ compiles and links invalid code when shadowing global function in function scope
Date: Thu, 07 Apr 2016 13:50:00 -0000
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Bug ID: 70576
Summary: G++ compiles and links invalid code when shadowing
global function in function scope
Product: gcc
Version: 5.3.0
Status: UNCONFIRMED
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Priority: P3
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Assignee: unassigned at gcc dot gnu.org
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int foo() { return 2; }
int main() {
int& foo();
foo() = 42; // Segfault
}
First detected here:
https://stackoverflow.com/questions/36477542/what-does-int-foo-mean-in-c
Compiles with GCC 4.7.4, 4.8.5, 4.9.3 and 5.3.0 without any warnings with -Wall
-Wextra -Wshadow.
Clang errors with:
test.cpp:3:8: error: functions that differ only in their return type cannot be
overloaded
int& foo();
~~~~ ^
test.cpp:1:5: note: previous definition is here
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Subject: [Bug tree-optimization/70577] tree-ssa/prefetch-5.c scan-tree-dump-times aprefetch failures
Date: Thu, 07 Apr 2016 13:51:00 -0000
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vries at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
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Ever confirmed|0 |1
--- Comment #1 from vries at gcc dot gnu.org ---
Confirmed: https://gcc.gnu.org/ml/gcc-testresults/2016-04/msg00602.html :
...
FAIL: gcc.dg/tree-ssa/prefetch-5.c scan-tree-dump-times aprefetch "Issued
prefetch" 2
FAIL: gcc.dg/tree-ssa/prefetch-5.c scan-tree-dump-times aprefetch "Not
prefetching" 1
...
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Subject: [Bug c++/70414] Function declaration in other scope: type safety violation
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Jaak Ristioja <jaak at ristioja dot ee> changed:
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----------------------------------------------------------------------------
CC| |jaak at ristioja dot ee
--- Comment #3 from Jaak Ristioja <jaak at ristioja dot ee> ---
*** Bug 70576 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-521448-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 13:54:38 2016
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Subject: [Bug c++/70576] G++ compiles and links invalid code when shadowing global function in function scope
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Jaak Ristioja <jaak at ristioja dot ee> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #1 from Jaak Ristioja <jaak at ristioja dot ee> ---
OFTC #gcc [16:54:00] <denim_chicken> jotik: that the code doesn't get rejected
is a bug in gcc: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70414
*** This bug has been marked as a duplicate of bug 70414 ***
>From gcc-bugs-return-521450-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 14:11:53 2016
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From: "rogero at howzatt dot demon.co.uk" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug preprocessor/69650] [6 Regression] ICE in linemap_line_start, at libcpp/line-map.c:803
Date: Thu, 07 Apr 2016 14:11:00 -0000
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--- Comment #39 from Roger Orr <rogero at howzatt dot demon.co.uk> ---
The resolution of this issue causes a problem for me as it results in
compilation errors in our build.
We are compiling with distcc which AIUI distributes the pre-processed
intermediate output.
With revision 234480 we get no warnings logged and clean compilation.
With revision 234481 we get a number of warnings logged - but this interacts
unfortunately with -Werror (which we also set) and so quite a number of our
compilations fail.
(I cannot as yet detect a pattern with which compilations are affected, but the
set is consistent on a rebuild.)
I can reproduce the distcc problem by using -E to generate pre-processed source
and compiling this.
Note: the pre-processed intermediate output does not change between 234480 and
234481, it's the compilation of this pre-processed output that fails.
Unfortunately the failing code is proprietary so I am not at liberty to upload
the pre-processed output, I have attempted to produce some smaller examples but
so far with no success.
Could the generation of the warning be made dependent upon a more specific
warning flag?
>From gcc-bugs-return-521451-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 14:25:45 2016
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Subject: [Bug tree-optimization/70577] tree-ssa/prefetch-5.c scan-tree-dump-times aprefetch failures
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--- Comment #2 from vries at gcc dot gnu.org ---
https://gcc.gnu.org/ml/gcc-regression/2016-03/msg00336.html :
Regressions on trunk at revision 234600 vs revision 234546
>From gcc-bugs-return-521453-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 14:35:33 2016
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Subject: [Bug fortran/70575] write syntax check
Date: Thu, 07 Apr 2016 14:35:00 -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
Resolution|--- |INVALID
--- Comment #1 from kargl at gcc dot gnu.org ---
Add -std=f95 to your command line.
troutmask:sgk[206] gfc6 -c -std=f95 a.f90
a.f90:2:13:
write(*,*) , 1
1
Error: GNU Extension: Comma before i/o item list at (1)
troutmask:sgk[207]
>From gcc-bugs-return-521454-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 14:35:41 2016
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Subject: [Bug c++/69855] Missing diagnostic for overload that only differs by return type
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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CC| |stackoverflow_dl@gmx-topmai
| |l.de
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
*** Bug 70414 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-521452-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 14:35:33 2016
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70414] Function declaration in other scope: type safety violation
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This is a dup of a bug I opened recently.
*** This bug has been marked as a duplicate of bug 69855 ***
>From gcc-bugs-return-521455-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 14:45:01 2016
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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug debug/70578] New: internal compiler error: in output_index_string, at dwarf2out.c with -gsplit-dwarf
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Bug ID: 70578
Summary: internal compiler error: in output_index_string, at
dwarf2out.c with -gsplit-dwarf
Product: gcc
Version: 6.0
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Severity: normal
Priority: P3
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Created attachment 38211
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38211&action=edit
preprocessed
With
Target: x86_64-pc-linux-gnu
Configured with: /home/marek/src/gcc/configure --enable-languages=c,c++,objc
--enable-checking=yes -with-system-zlib --disable-bootstrap --disable-libvtv
--disable-libcilkrts --disable-libitm --disable-libgomp --disable-libcc1
--disable-libstdcxx-pch --disable-libssp --disable-isl --disable-libatomic
Thread model: posix
gcc version 6.0.0 20160407 (experimental) (GCC)
I see:
$ ./cc1plus -fpreprocessed q.ii -quiet -g3 -gsplit-dwarf -O -w
q.ii:763:1: internal compiler error: in output_index_string, at
dwarf2out.c:25505
}
^
0xa09c4e output_index_string(indirect_string_node**, unsigned int*)
/home/marek/src/gcc/gcc/dwarf2out.c:25505
0xa1978e void hash_table<indirect_string_hasher,
xcallocator>::traverse_noresize<unsigned int*,
&(output_index_string(indirect_string_node**, unsigned int*))>(unsigned int*)
/home/marek/src/gcc/gcc/hash-table.h:950
0xa09dd7 output_indirect_strings
/home/marek/src/gcc/gcc/dwarf2out.c:25550
0xa0e8d6 dwarf2out_finish
/home/marek/src/gcc/gcc/dwarf2out.c:27680
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
>From gcc-bugs-return-521456-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 14:49:46 2016
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Subject: [Bug tree-optimization/70577] tree-ssa/prefetch-5.c scan-tree-dump-times aprefetch failures
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vries at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |hubicka at gcc dot gnu.org
--- Comment #3 from vries at gcc dot gnu.org ---
Offending commit: https://gcc.gnu.org/ml/gcc-cvs/2016-03/msg00744.html :
...
Author: hubicka
Date: Wed Mar 30 14:30:57 2016
New Revision: 234572
URL: https://gcc.gnu.org/viewcvs?rev=234572&root=gcc&view=rev
Log:
* tree-ssa-loop-niter.c (idx_infer_loop_bounds): We can't get realistic
estimates here.
* tree-ssa-loop-unswitch.c (tree_unswitch_single_loop): Use also
max_loop_iterations_int.
(tree_unswitch_outer_loop): Likewise.
* tree-ssa-loop-ivopts.c (avg_loop_niter): Likewise.
* tree-vect-loop.c (vect_analyze_loop_2): Likewise.
...
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Subject: [Bug debug/70578] internal compiler error: in output_index_string, at dwarf2out.c with -gsplit-dwarf
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #38211|0 |1
is obsolete| |
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Created attachment 38212
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38212&action=edit
preprocessed
Updated preprocessed file.
>From gcc-bugs-return-521458-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 15:03:43 2016
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Subject: [Bug sanitizer/70573] FAIL: c-c++-common/asan/halt_on_error-1.c -O* execution test x86_64-apple-darwin15
Date: Thu, 07 Apr 2016 15:03:00 -0000
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--- Comment #5 from Yury Gribov <y.gribov at samsung dot com> ---
Created attachment 38213
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38213&action=edit
Proposed patch
Ah, so the problem is caused by _FORTIFY_SOURCE being enabled on Darwin by
default. This check precedes ASan and causes app to abort too early. Could you
test the attached patch?
>From gcc-bugs-return-521459-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 15:06:55 2016
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/70574] [5/6 Regression] wrong code with -mavx2, read of partially initialised stack variable
Date: Thu, 07 Apr 2016 15:06:00 -0000
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Actually, I believe the bug is already at fwprop1.
We have:
(insn 247 246 18 2 (set (reg:DI 301 [ u128_0 ])
(const_int 0 [0])) pr70574.c:7 85 {*movdi_internal}
(nil))
(insn 18 247 19 2 (set (reg:QI 115)
(not:QI (subreg:QI (reg:DI 301 [ u128_0 ]) 0))) pr70574.c:8 506
{*one_cmplqi2_1}
(nil))
...
(insn 31 30 32 2 (set (reg:SI 128)
(subreg:SI (reg:QI 115) 0)) pr70574.c:8 86 {*movsi_internal}
(nil))
and fwprop1 does:
In insn 31, replacing
(subreg:SI (reg:QI 115) 0)
with (const_int -1 [0xffffffffffffffff])
Changes to insn 31 not profitable
Setting REG_EQUAL note
and that turns insn 31 into:
(insn 31 29 32 2 (set (reg:SI 128)
(subreg:SI (reg:QI 115) 0)) pr70574.c:8 86 {*movsi_internal}
(expr_list:REG_EQUAL (const_int -1 [0xffffffffffffffff])
(expr_list:REG_DEAD (reg:QI 115)
(nil))))
(and correctly modifies insn 18 first to (set (reg:QI 115) (const_int -1))).
The bug is in the REG_EQUAL note, (subreg:SI (reg:QI 115) 0), a paradoxical
subreg of QImode -1, is not equivalent to SImode -1. So, either fwprop should
have replaced it the paradoxical subreg with CONST_INT, or it shouldn't add the
REG_EQUAL note.
>From gcc-bugs-return-521460-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 15:09:41 2016
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Comment on attachment 38213
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Proposed patch
Perhaps just use __builtin_memset instead of memset instead?
>From gcc-bugs-return-521461-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 15:28:30 2016
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Subject: [Bug preprocessor/69650] [6 Regression] ICE in linemap_line_start, at libcpp/line-map.c:803
Date: Thu, 07 Apr 2016 15:28:00 -0000
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--- Comment #40 from Bernd Schmidt <bernds at gcc dot gnu.org> ---
The message previously was a plain printf, not a warning or error so it would
not have interrupted compilation. Did you get the message with earlier
compilers, or did it start to appear recently?
>From gcc-bugs-return-521462-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 15:41:21 2016
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Subject: [Bug sanitizer/70573] FAIL: c-c++-common/asan/halt_on_error-1.c -O* execution test x86_64-apple-darwin15
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--- Comment #7 from Yury Gribov <y.gribov at samsung dot com> ---
Right. Dominique, can you check if s/memset/__builtin_memset/g fixes the issue?
>From gcc-bugs-return-521463-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 15:49:24 2016
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Subject: [Bug target/59683] ICE: in classify_argument, at config/i386/i386.c:6637 with #pragma GCC target("avx512f")
Date: Thu, 07 Apr 2016 15:49:00 -0000
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--- Comment #3 from Kirill Yukhin <kyukhin at gcc dot gnu.org> ---
This hunk from Jakub's fix for PR61925 makes test working:
diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index a41efa4..6aebaed 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -4962,6 +4962,15 @@ static GTY(()) tree ix86_previous_fndecl;
void
ix86_reset_previous_fndecl (void)
{
+ tree new_tree = target_option_current_node;
+ cl_target_option_restore (&global_options, TREE_TARGET_OPTION (new_tree));
+ if (TREE_TARGET_GLOBALS (new_tree))
+ restore_target_globals (TREE_TARGET_GLOBALS (new_tree));
+ else if (new_tree == target_option_default_node)
+ restore_target_globals (&default_target_globals);
+ else
+ TREE_TARGET_GLOBALS (new_tree) = save_target_globals_default_opts ();
+
ix86_previous_fndecl = NULL_TREE;
}
>From gcc-bugs-return-521464-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 16:06:03 2016
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From: "rogero at howzatt dot demon.co.uk" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug preprocessor/69650] [6 Regression] ICE in linemap_line_start, at libcpp/line-map.c:803
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--- Comment #41 from Roger Orr <rogero at howzatt dot demon.co.uk> ---
I have seen the message before: for example from a build with revision
line-map.c: file "/usr/include/asm/sockios.h" left but not entered
I've only noticed it with builds from gcc-trunk, which I tested with back in
Dec/Jan. I saw this message from some compilation but it seemed benign...
I have not seen this message with builds from gcc 5.3.0 and before, but it is
possible I've simply not noticed as it does gets a bit buried in the build
logs.
>From gcc-bugs-return-521465-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 16:12:52 2016
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Subject: [Bug c++/70452] [5/6 Regression] Regression in C++ parsing performance between 4.9.3 and 5.3.1
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--- Comment #13 from Patrick Palka <ppalka at gcc dot gnu.org> ---
Author: ppalka
Date: Thu Apr 7 16:12:05 2016
New Revision: 234810
URL: https://gcc.gnu.org/viewcvs?rev=234810&root=gcc&view=rev
Log:
Avoid needless unsharing during constexpr evaluation (PR c++/70452)
gcc/cp/ChangeLog:
PR c++/70452
* constexpr.c (find_constructor): New function.
(unshare_constructor): New function.
(cxx_eval_call_expression): Use unshare_constructor instead of
unshare_expr.
(find_array_ctor_elt): Likewise.
(cxx_eval_vec_init_1): Likewise.
(cxx_eval_store_expression): Likewise.
(cxx_eval_constant_expression): Likewise.
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/constexpr.c
>From gcc-bugs-return-521466-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 16:13:47 2016
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Subject: [Bug sanitizer/70573] FAIL: c-c++-common/asan/halt_on_error-1.c -O* execution test x86_64-apple-darwin15
Date: Thu, 07 Apr 2016 16:13:00 -0000
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--- Comment #8 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Right. Dominique, can you check if s/memset/__builtin_memset/g fixes the issue?
The test succeeds with the following patch
--- ../_clean/gcc/testsuite/c-c++-common/asan/halt_on_error-1.c 2015-11-23
10:17:05.000000000 +0100
+++ gcc/testsuite/c-c++-common/asan/halt_on_error-1.c 2016-04-07
18:10:11.000000000 +0200
@@ -9,7 +9,7 @@ volatile int ten = 10;
int main() {
char x[10];
- memset(x, 0, ten + 1);
+ __builtin_memset(x, 0, ten + 1);
asm volatile ("" : : : "memory");
volatile int res = x[ten];
x[ten] = res + 3;
Thanks.
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Subject: [Bug target/70566] [4.9/5/6 Regression] Bad ARM code generated for evaluating unsigned int bitfield value
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--- Comment #9 from ktkachov at gcc dot gnu.org ---
Patch posted at:
https://gcc.gnu.org/ml/gcc-patches/2016-04/msg00351.html
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Subject: [Bug testsuite/70553] pr70496.c should exclude Thumb only targets
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--- Comment #1 from Thomas Preud'homme <thopre01 at gcc dot gnu.org> ---
Author: thopre01
Date: Thu Apr 7 16:19:20 2016
New Revision: 234811
URL: https://gcc.gnu.org/viewcvs?rev=234811&root=gcc&view=rev
Log:
2016-04-07 Thomas Preud'homme <thomas.preudhomme@arm.com>
gcc/testsuite/
PR testsuite/70553
* gcc.target/arm/pr70496.c: Also require arm_arm_ok effective target.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.target/arm/pr70496.c
>From gcc-bugs-return-521469-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 16:20:38 2016
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Subject: [Bug sanitizer/70573] FAIL: c-c++-common/asan/halt_on_error-1.c -O* execution test x86_64-apple-darwin15
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--- Comment #9 from Yury Gribov <y.gribov at samsung dot com> ---
Better do the same for halt_on_error-2.
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Subject: [Bug middle-end/70579] New: [gomp4] -O0 execution testing FAILs for libgomp.oacc-c-c++-common/host_data-1.c
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Bug ID: 70579
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PASSes in trunk.
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Subject: [Bug fortran/60751] Extra comma in WRITE statement not diagnosed
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What |Removed |Added
----------------------------------------------------------------------------
CC| |valeryweber at hotmail dot com
--- Comment #16 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
*** Bug 70575 has been marked as a duplicate of this bug. ***
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Subject: [Bug middle-end/70580] New: [gomp4] -O0 execution testing FAILs for libgomp.oacc-c-c++-common/if-1.c
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Bug ID: 70580
Summary: [gomp4] -O0 execution testing FAILs for
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Product: gcc
Version: 6.0
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PASSes in trunk.
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Subject: [Bug fortran/70575] write syntax check
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
Resolution|INVALID |DUPLICATE
--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
*** This bug has been marked as a duplicate of bug 60751 ***
>From gcc-bugs-return-521474-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 16:33:46 2016
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Subject: [Bug target/70581] New: [6 regression] gcc.dg/lto/simd-function FAILs
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Bug ID: 70581
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Host: i386-pc-solaris2.1[012]
Target: i386-pc-solaris2.1[012]
Build: i386-pc-solaris2.1[012]
After 20160401, the gcc.dg/lto/simd-function testcase began to FAIL on
Solaris/x86
with /bin/as:
FAIL: gcc.dg/lto/simd-function c_lto_simd-function_0.o assemble, -fopenmp-simd
-O3 -ffast-math -mavx2 -flto -flto-partition=max
UNRESOLVED: gcc.dg/lto/simd-function
c_lto_simd-function_0.o-c_lto_simd-function_0.o execute -fopenmp-simd -O3
-ffast-math -mavx2 -flto -flto-partition=max
UNRESOLVED: gcc.dg/lto/simd-function
c_lto_simd-function_0.o-c_lto_simd-function_0.o link -fopenmp-simd -O3
-ffast-math -mavx2 -flto -flto-partition=max
Assembler: simd-function_0.c
"/var/tmp//ccw.aGWM.s", line 850 : Invalid instruction argument
Near line: " vmulps %zmm1, %zmm0, %zmm0"
"/var/tmp//ccw.aGWM.s", line 858 : Illegal mnemonic
Near line: " vpxord %zmm3, %zmm3, %zmm3"
"/var/tmp//ccw.aGWM.s", line 858 : Syntax error
Near line: " vpxord %zmm3, %zmm3, %zmm3"
"/var/tmp//ccw.aGWM.s", line 860 : Invalid instruction argument
Near line: " vmulps %zmm1, %zmm0, %zmm0"
"/var/tmp//ccw.aGWM.s", line 863 : Illegal mnemonic
Near line: " vpcmpd $4, %zmm3, %zmm2, %k1"
"/var/tmp//ccw.aGWM.s", line 863 : Syntax error
Near line: " vpcmpd $4, %zmm3, %zmm2, %k1"
"/var/tmp//ccw.aGWM.s", line 866 : Illegal mnemonic
Near line: " kmovw %k1, %eax"
"/var/tmp//ccw.aGWM.s", line 866 : Syntax error
Near line: " kmovw %k1, %eax"
"/var/tmp//ccw.aGWM.s", line 870 : Invalid instruction argument
Near line: " vmovaps %zmm0, -120(%ebp){%k1}"
"/var/tmp//ccw.aGWM.s", line 872 : Invalid instruction argument
Near line: " vmovaps -120(%ebp), %zmm0"
for both 32 and 64-bit. It seems the compiler started to emit avx512f insns
despite the -mavx2. Either the testcase needs to be amended requiring the
corresponding effective-target, or the compiler fixed not to emit those unless
told to...
Here's a diff between the assembler outputs from 20160401 and 20160407:
--- /homes/ro/simd-function_0.s 2016-04-07 18:05:16.449629000 +0200
+++ simd-function_0.s 2016-04-07 18:06:05.170292167 +0200
[...]
@@ -846,6 +846,39 @@
leal -4(%ecx), %esp
ret
.size _ZGVdM8vv_my_mul, .-_ZGVdM8vv_my_mul
+ .p2align 4,,15
+ .globl _ZGVeN16vv_my_mul
+ .type _ZGVeN16vv_my_mul, @function
+_ZGVeN16vv_my_mul:
+ vmulps %zmm1, %zmm0, %zmm0
+ ret
+ .size _ZGVeN16vv_my_mul, .-_ZGVeN16vv_my_mul
+ .p2align 4,,15
+ .globl _ZGVeM16vv_my_mul
+ .type _ZGVeM16vv_my_mul, @function
+_ZGVeM16vv_my_mul:
+ leal 4(%esp), %ecx
+ vpxord %zmm3, %zmm3, %zmm3
+ andl $-64, %esp
+ vmulps %zmm1, %zmm0, %zmm0
+ pushl -4(%ecx)
+ pushl %ebp
+ vpcmpd $4, %zmm3, %zmm2, %k1
+ movl %esp, %ebp
+ pushl %ecx
+ kmovw %k1, %eax
+ subl $308, %esp
+ testw %ax, %ax
+ je .L89
+ vmovaps %zmm0, -120(%ebp){%k1}
+.L89:
+ vmovaps -120(%ebp), %zmm0
+ addl $308, %esp
+ popl %ecx
+ popl %ebp
+ leal -4(%ecx), %esp
+ ret
+ .size _ZGVeM16vv_my_mul, .-_ZGVeM16vv_my_mul
.comm x,16384,32
.section .rodata
.align 4
Rainer
>From gcc-bugs-return-521475-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 16:34:14 2016
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Subject: [Bug target/70581] [6 regression] gcc.dg/lto/simd-function FAILs
Date: Thu, 07 Apr 2016 16:34:00 -0000
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Rainer Orth <ro at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Target Milestone|--- |6.0
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Subject: [Bug ipa/70582] New: [6 regression] gcc.dg/attr-weakref-1.c FAILs
Date: Thu, 07 Apr 2016 16:42:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70582
Bug ID: 70582
Summary: [6 regression] gcc.dg/attr-weakref-1.c FAILs
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: ipa
Assignee: unassigned at gcc dot gnu.org
Reporter: ro at gcc dot gnu.org
CC: hubicka at gcc dot gnu.org
Target Milestone: ---
Host: i386-pc-solaris2.1[012]
Target: i386-pc-solaris2.1[012]
Build: i386-pc-solaris2.1[012]
After 20160401, gcc.dg/attr-weakref-1.c started to FAIL on Solaris/x86 with
/bin/as:
FAIL: gcc.dg/attr-weakref-1.c (test for excess errors)
WARNING: gcc.dg/attr-weakref-1.c compilation failed to produce executable
Excess errors:
Assembler: attr-weakref-1.c
"/var/tmp//ccUSaysF.s", line 171 : Multiply defined symbol: "Wv3a"
I'm attaching the assembler output. When using gas, this still works since
.weakref is used there.
Most likely caused by the recent patch for PR ipa/68881.
Rainer
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Subject: [Bug ipa/70582] [6 regression] gcc.dg/attr-weakref-1.c FAILs
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--- Comment #1 from Rainer Orth <ro at gcc dot gnu.org> ---
Created attachment 38214
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38214&action=edit
assembler output
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Rainer Orth <ro at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Target Milestone|--- |6.0
>From gcc-bugs-return-521479-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 16:52:47 2016
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Subject: [Bug testsuite/70581] [6 regression] gcc.dg/lto/simd-function FAILs
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2016-04-07
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Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 38215
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38215&action=edit
gcc6-pr70581.patch
Your assembler is too old. Untested fix.
>From gcc-bugs-return-521480-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 16:59:02 2016
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Subject: [Bug sanitizer/70573] FAIL: c-c++-common/asan/halt_on_error-1.c -O* execution test x86_64-apple-darwin15
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--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Of course. Patch changing both is preapproved.
>From gcc-bugs-return-521481-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 17:05:45 2016
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Subject: [Bug preprocessor/70518] Conditional compilation of #line directives
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--- Comment #4 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
On Sun, 3 Apr 2016, elyk03 at gmail dot com wrote:
> Should #line be processed unconditionally? I know the preprocessor has to keep
It should not be processed in skipped blocks. See C11 6.10.1#6: "Each
directive’s condition is checked in order. If it evaluates to false
(zero), the group that it controls is skipped: directives are processed
only through the name that determines the directive in order to keep track
of the level of nested conditionals; the rest of the directives’
preprocessing tokens are ignored, as are the other preprocessing tokens in
the group.".
This means, for example, that
#if 0
#line invalid line directive
#endif
is valid, whereas that #line directive would not be valid outside #if 0.
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--- Comment #42 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
(In reply to Roger Orr from comment #41)
> I have seen the message before: for example from a build with revision
>
> line-map.c: file "/usr/include/asm/sockios.h" left but not entered
You can also simply filter every '^# [0-9]' line from the preprocessed output
before compiling. There must be some broken linemarker, perhaps as a result of
copy-pasting from another preprocessed file.
I wonder, don't we give a precise location now for the broken linemarker?
Perhaps we should control this with -Wlinemarker, such that people can use
-Wno-linemarker. We may have underestimated how much broken code might be out
there.
>From gcc-bugs-return-521483-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 17:11:05 2016
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Subject: [Bug preprocessor/70518] Conditional compilation of #line directives
Date: Thu, 07 Apr 2016 17:11:00 -0000
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #5 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
(In reply to joseph@codesourcery.com from comment #4)
> On Sun, 3 Apr 2016, elyk03 at gmail dot com wrote:
>
> > Should #line be processed unconditionally? I know the preprocessor has to keep
>
> It should not be processed in skipped blocks. See C11 6.10.1#6
I think that settles it.
It might be worth it to open a different PR saying that the caret line should
use the real source location and ignore line directives (and linemarkers). That
seems hard to fix, though.
>From gcc-bugs-return-521484-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 17:25:38 2016
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Subject: [Bug preprocessor/69650] [6 Regression] ICE in linemap_line_start, at libcpp/line-map.c:803
Date: Thu, 07 Apr 2016 17:25:00 -0000
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--- Comment #43 from Bernd Schmidt <bernds at gcc dot gnu.org> ---
I suspect the message Roger quoted was from the earlier version with the
printf; that one didn't give a location.
I advocate no action until we have a reproducer so we can know what's going on.
>From gcc-bugs-return-521486-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 17:29:35 2016
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Subject: [Bug c++/70452] [5/6 Regression] Regression in C++ parsing performance between 4.9.3 and 5.3.1
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--- Comment #14 from Patrick Palka <ppalka at gcc dot gnu.org> ---
trunk is now at
Execution times (seconds)
phase setup : 0.00 ( 0%) usr 0.00 ( 0%) sys 0.01 ( 1%) wall
1287 kB ( 1%) ggc
phase parsing : 1.28 (100%) usr 0.20 (100%) sys 1.48 (99%)
wall 156462 kB (99%) ggc
|name lookup : 0.03 ( 2%) usr 0.01 ( 5%) sys 0.04 ( 3%) wall
81 kB ( 0%) ggc
|overload resolution : 0.04 ( 3%) usr 0.00 ( 0%) sys 0.05 ( 3%) wall
628 kB ( 0%) ggc
preprocessing : 0.03 ( 2%) usr 0.04 (20%) sys 0.09 ( 6%) wall
2048 kB ( 1%) ggc
parser (global) : 0.02 ( 2%) usr 0.07 (35%) sys 0.06 ( 4%) wall
7735 kB ( 5%) ggc
parser function body : 1.23 (96%) usr 0.09 (45%) sys 1.33 (89%) wall
146667 kB (93%) ggc
TOTAL : 1.28 0.20 1.49
157759 kB
The remaining extra memory and runtime overhead relative to 4.9 is mostly due
to the constexpr_call_table which caches the result of each constexpr call
that's been evaluated. This table now gets cleared during GC though which in
real programs triggers frequently enough that its size won't be a problem.
>From gcc-bugs-return-521485-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 17:29:19 2016
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Subject: [Bug c/66425] (void) cast doesn't suppress __attribute__((warn_unused_result))
Date: Thu, 07 Apr 2016 17:29:00 -0000
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costinc at gmail dot com changed:
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CC| |costinc at gmail dot com
--- Comment #23 from costinc at gmail dot com ---
I've just been bitten by this.
The problem isn't the attribute, it's the on-by-default warning. Why force
people to move from one convention of ignoring expression results to another?
I've just wasted one hour of my life. On the opposite side of the scale there
are people using prettier ways to ignore expression results. I really hope
someone, somewhere, was deterred from ignoring a result using a much uglier
method than (void) and, because of it, fixed a real bug (this must be the only
scenario that favors disallowing (void), deterrence through repugnance, am I
wrong?).
Note that casting to void seems to be mentioned in the standard precisely for
discarding expression results:
"Any expression can be explicitly converted to type “cv void.†The expression
value is discarded."
At best, this warning should be restricted to gnu99 or similar.
And if the attribute and it's associated warning are supposed to apply only to
important security related code then where is the warning for non-security
related code? The warning name pretty clearly relates to the general problem.
Isn't that confusing?
My 2c: Clang did the right thing.
Please, at least make the warning off-by-default.
>From gcc-bugs-return-521487-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 17:50:30 2016
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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 testsuite/70581] [6 regression] gcc.dg/lto/simd-function FAILs
Date: Thu, 07 Apr 2016 17:50:00 -0000
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--- Comment #2 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> --- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
> Created attachment 38215
> --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38215&action=edit
> gcc6-pr70581.patch
>
> Your assembler is too old. Untested fix.
Just tried it: with /bin/as, the test becomes unsupported because the
avx512f test fails, with gas it passes as before.
Thanks.
Rainer
>From gcc-bugs-return-521488-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 17:51:02 2016
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Subject: [Bug c++/70583] New: [6 Regression] FAIL: g++.old-deja/g++.abi/vtable2.C -std=gnu++98 execution test
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Bug ID: 70583
Summary: [6 Regression] FAIL: g++.old-deja/g++.abi/vtable2.C
-std=gnu++98 execution test
Product: gcc
Version: 6.0
Status: UNCONFIRMED
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Reporter: danglin at gcc dot gnu.org
Target Milestone: ---
Host: hppa64-hp-hpux11.11
Target: hppa64-hp-hpux11.11
Build: hppa2.0w-hp-hpux11.11
spawn /test/gnu/gcc/objdir/gcc/testsuite/g++/../../xg++
-B/test/gnu/gcc/objdir/g
cc/testsuite/g++/../../
/test/gnu/gcc/gcc/gcc/testsuite/g++.old-deja/g++.abi/vta
ble2.C -fno-diagnostics-show-caret -fdiagnostics-color=never -nostdinc++
-I/test
/gnu/gcc/objdir/hppa64-hp-hpux11.11/libstdc++-v3/include/hppa64-hp-hpux11.11
-I/
test/gnu/gcc/objdir/hppa64-hp-hpux11.11/libstdc++-v3/include
-I/test/gnu/gcc/gcc
/libstdc++-v3/libsupc++ -I/test/gnu/gcc/gcc/libstdc++-v3/include/backward
-I/tes
t/gnu/gcc/gcc/libstdc++-v3/testsuite/util -fmessage-length=0 -std=gnu++98
-fno-s
trict-aliasing
-L/test/gnu/gcc/objdir/hppa64-hp-hpux11.11/./libstdc++-v3/src/.li
bs -B/test/gnu/gcc/objdir/hppa64-hp-hpux11.11/./libstdc++-v3/src/.libs
-L/test/g
nu/gcc/objdir/hppa64-hp-hpux11.11/./libstdc++-v3/src/.libs -lm -o ./vtable2.exe
PASS: g++.old-deja/g++.abi/vtable2.C -std=gnu++98 (test for excess errors)
Setting LD_LIBRARY_PATH to
.:/test/gnu/gcc/objdir/hppa64-hp-hpux11.11/./libstdc+
+-v3/src/.libs:/test/gnu/gcc/objdir/hppa64-hp-hpux11.11/./libstdc++-v3/src/.libs
:/test/gnu/gcc/objdir/gcc:.:/test/gnu/gcc/objdir/hppa64-hp-hpux11.11/./libstdc++
-v3/src/.libs:/test/gnu/gcc/objdir/hppa64-hp-hpux11.11/./libstdc++-v3/src/.libs:
/test/gnu/gcc/objdir/gcc
spawn [open ...]
FAIL: g++.old-deja/g++.abi/vtable2.C -std=gnu++98 execution test
Test returns 5 and fails in this hunk:
if (! CMP_VPTR (vtbl, &S3_s3))
return 5;
Breakpoint 1, main ()
at /test/gnu/gcc/gcc/gcc/testsuite/g++.old-deja/g++.abi/vtable2.C:175
175 if (! CMP_VPTR (vtbl, &S3_s3))
(gdb) p vtbl
$1 = (ptrdiff_t *) 0x80000001000001d0 <vtable for S4+40>
(gdb) p S3_s3
$2 = {<text variable, no debug info>} 0x40000000000034c0 <S3::s3()>
(gdb) p &S3_s3
$3 = (<text variable, no debug info> *) 0x40000000000034c0 <S3::s3()>
(gdb) stepi
0x400000000000366c 175 if (! CMP_VPTR (vtbl, &S3_s3))
(gdb)
0x4000000000003670 175 if (! CMP_VPTR (vtbl, &S3_s3))
(gdb)
0x4000000000003674 175 if (! CMP_VPTR (vtbl, &S3_s3))
(gdb)
0x4000000000003678 175 if (! CMP_VPTR (vtbl, &S3_s3))
(gdb)
0x400000000000367c 175 if (! CMP_VPTR (vtbl, &S3_s3))
(gdb)
0x4000000000003680 175 if (! CMP_VPTR (vtbl, &S3_s3))
(gdb)
176 return 5;
This is with revision 234788. Revision 234427 was okay.
Similar fails:
FAIL: g++.old-deja/g++.abi/vtable2.C -std=gnu++11 execution test
FAIL: g++.old-deja/g++.abi/vtable2.C -std=gnu++14 execution test
>From gcc-bugs-return-521489-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 17:57:54 2016
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Subject: [Bug c++/70584] New: constexpr variables cannot be used as intrinsic arguments where an immediate is expected
Date: Thu, 07 Apr 2016 17:57:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70584
Bug ID: 70584
Summary: constexpr variables cannot be used as intrinsic
arguments where an immediate is expected
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: daniel.gutson at tallertechnologies dot com
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Created attachment 38216
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38216&action=edit
test case
The following code causes gcc to complain that the last argument should be an
8-bit immediate value:
#include <wmmintrin.h>
int main()
{
__m128i r;
constexpr auto index = 1;
r = _mm_aeskeygenassist_si128(r, index);
}
This fails with -O0 but not with -O3.
The arguments to reproduce the issue are:
g++ -std=c++14 -msse -msse2 -maes -O0 tst.cpp -o tst
I attached the code anyway.
FWIW, this works in clang both for -O0 and for -O3. I think that constexpr
variables should be valid immediate arguments.
This bug affects the development of template metaprograms.
If there is agreement that this should be fixed, feel free to assign this to
andres.tiraboschi@tallertechnologies.com .
>From gcc-bugs-return-521490-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 18:00:58 2016
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From: "joseph at codesourcery dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70117] ppc long double isinf() is wrong?
Date: Thu, 07 Apr 2016 18:00:00 -0000
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--- Comment #16 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
On Tue, 5 Apr 2016, amodra at gmail dot com wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70117
>
> --- Comment #14 from Alan Modra <amodra at gmail dot com> ---
> > if (fmt == &ibm_extended_double)
>
> No, there is mips_extended_format too.
I think that's now unused after the removal of IRIX support, and so should
be removed from GCC. (The support for that format in fp-bit.[ch] is also
now unused.)
>From gcc-bugs-return-521491-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 18:12:01 2016
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From: "joseph at codesourcery dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70529] Unhelpful diagnostic for hex float literals, inconsistent parsing
Date: Thu, 07 Apr 2016 18:12:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70529
--- Comment #4 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
On Tue, 5 Apr 2016, manu at gcc dot gnu.org wrote:
> According to the manual, if an extension is not incompatible with the base
> standard, it should not be disabled:
In general, this extension *is* incompatible with the base standard -
there are cases where a program is valid with both versions of pp-numbers,
but with different semantics. See gcc.dg/c90-hexfloat-2.c, for example.
That case involves pp-numbers such as 0x1p+f that aren't valid to convert
to tokens. But you could produce other examples involving concatenation
that are valid without hex floats but not with them, e.g.:
#define a0x123p b
#define concat(x, y) x##y
concat(a, 0x123p-2)
which is valid without hex floats (expanding to b-2), but invalid with
them because of an invalid concatenation. So any extended pp-number
syntax that include valid hex floats also introduces errors on valid code.
It should be possible to lex according to the selected standard, but track
that a pp-token could be a hex float together with the following two
pp-tokens (+ or - and the exponent with possible suffix) and then handle
things specially if that sequence of pp-tokens ends up getting converted
to tokens.
>From gcc-bugs-return-521492-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 18:15:12 2016
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Subject: [Bug target/70381] On powerpc, -mfloat128 is on by default for all VSX systems
Date: Thu, 07 Apr 2016 18:15:00 -0000
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Michael Meissner <meissner at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Last reconfirmed| |2016-04-07
Resolution|FIXED |---
Ever confirmed|0 |1
--- Comment #3 from Michael Meissner <meissner at gcc dot gnu.org> ---
Unfortunately the fix checked disables building the software emulation
functions in libgcc.
This is due to #pragma GCC target ("vsx,float128") does not enable the
__float128 keyword, so the test fails.
>From gcc-bugs-return-521493-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 19:38:25 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70584] constexpr variables cannot be used as intrinsic arguments where an immediate is expected
Date: Thu, 07 Apr 2016 19:38:00 -0000
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--- Comment #1 from Daniel Gutson <daniel.gutson at tallertechnologies dot com> ---
Additional data: an enumerator works:
int main()
{
__m128i r;
//constexpr auto index = 1;
enum { index = 1 };
r = _mm_aeskeygenassist_si128(r, index);
}
>From gcc-bugs-return-521494-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 19:50:33 2016
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From: "rs2740 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70585] New: Bogus 'ambiguous template instantiation' error with partial specializations involving a pack expansion
Date: Thu, 07 Apr 2016 19:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70585
Bug ID: 70585
Summary: Bogus 'ambiguous template instantiation' error with
partial specializations involving a pack expansion
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Assignee: unassigned at gcc dot gnu.org
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Target Milestone: ---
Repro:
template<class> class meow;
template<class...> struct purr;
template<class T, class... Ts>
struct purr<T, meow<Ts>...> {};
template<class... Ts>
struct purr<int, meow<Ts>...> {};
template struct purr<int, meow<int>>;
gcc HEAD 6.0.0 20160407 (experimental) on Wandbox prints:
prog.cc:10:17: error: ambiguous template instantiation for 'struct purr<int,
meow<int> >'
template struct purr<int, meow<int>>;
^~~~~~~~~~~~~~~~~~~~
prog.cc:6:8: note: candidates are: template<class T, class ... Ts> struct
purr<T, meow<Ts>...> [with T = int; Ts = {int}]
struct purr<T, meow<Ts>...> {};
^~~~~~~~~~~~~~~~~~~~
prog.cc:8:8: note: template<class ... Ts> struct purr<int,
meow<Ts>...> [with Ts = {int}]
struct purr<int, meow<Ts>...> {};
^~~~~~~~~~~~~~~~~~~~~~
prog.cc:10:17: error: explicit instantiation of 'struct purr<int, meow<int> >'
before definition of template
template struct purr<int, meow<int>>;
^~~~~~~~~~~~~~~~~~~~
Clang compiles this code.
>From gcc-bugs-return-521495-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 20:07:59 2016
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From: "chengniansun at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/70586] New: wrong code at -O2 and -O3 on x86_64-linux-gnu in 32-bit and 64-bit modes
Date: Thu, 07 Apr 2016 20:07:00 -0000
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Bug ID: 70586
Summary: wrong code at -O2 and -O3 on x86_64-linux-gnu in
32-bit and 64-bit modes
Product: gcc
Version: 6.0
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The following code is miscompiled by the trunk at -O2 and -O3 on
x86_64-linux-gnu in 32-bit and 64-bit modes.
This also affects gcc-4.8 and later versions.
$: gcc-trunk -v
Using built-in specs.
COLLECT_GCC=gcc-trunk
COLLECT_LTO_WRAPPER=/usr/local/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/6.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto
--prefix=/usr/local/gcc-trunk --disable-bootstrap
Thread model: posix
gcc version 6.0.0 20160407 (experimental) [trunk revision 234805] (GCC)
$:
$: gcc-trunk -w -m32 small.c -O3 ; ./a.out
Floating point exception (core dumped)
$: gcc-trunk -w -m32 small.c -O2 ; ./a.out
Floating point exception (core dumped)
$: gcc-trunk -w -m32 small.c -O1 ; ./a.out
$: gcc-4.8 -w small.c -O3 ; ./a.out
Floating point exception (core dumped)
$: gcc-4.7 -w small.c -O3 ; ./a.out
$:
$: cat small.c
int a, e, f;
short b, c, d;
int fn1(p1, p2) { return p2 == 0 || p1 && p2 == 1 ? p1 : p1 % p2; }
static short fn2() {
int g, h, i = fn1(c, f);
f = fn1(d, 2);
g = fn1(b, c);
h = fn1(g > 0, c);
c = (3 >= h ^ 7) <= fn1(i, c);
if (fn1(e, 1))
return a;
}
int main() {
fn2();
return 0;
}
$:
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Subject: [Bug tree-optimization/70586] [4.9/5/6 Regression] wrong code at -O2 and -O3 on x86_64-linux-gnu in 32-bit and 64-bit modes
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-07
CC| |jakub at gcc dot gnu.org
Target Milestone|--- |4.9.4
Summary|wrong code at -O2 and -O3 |[4.9/5/6 Regression] wrong
|on x86_64-linux-gnu in |code at -O2 and -O3 on
|32-bit and 64-bit modes |x86_64-linux-gnu in 32-bit
| |and 64-bit modes
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r195751, which means that most likely it has been latent before.
>From gcc-bugs-return-521497-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 20:33:37 2016
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Subject: [Bug tree-optimization/70586] [4.9/5/6 Regression] wrong code at -O2 and -O3 on x86_64-linux-gnu in 32-bit and 64-bit modes
Date: Thu, 07 Apr 2016 20:33:00 -0000
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
int a, e, f;
short b, c, d;
int
foo (int x, int y)
{
return (y == 0 || (x && y == 1)) ? x : x % y;
}
static short
bar (void)
{
int i = foo (c, f);
f = foo (d, 2);
int g = foo (b, c);
int h = foo (g > 0, c);
c = (3 >= h ^ 7) <= foo (i, c);
if (foo (e, 1))
return a;
return 0;
}
int
main ()
{
bar ();
return 0;
}
I think this goes wrong during ifcombine, will have a look tomorrow.
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From: "manu at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70529] Unhelpful diagnostic for hex float literals, inconsistent parsing
Date: Thu, 07 Apr 2016 20:39:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70529
--- Comment #5 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
(In reply to joseph@codesourcery.com from comment #4)
> On Tue, 5 Apr 2016, manu at gcc dot gnu.org wrote:
>
> > According to the manual, if an extension is not incompatible with the base
> > standard, it should not be disabled:
>
> In general, this extension *is* incompatible with the base standard -
> there are cases where a program is valid with both versions of pp-numbers,
> but with different semantics. See gcc.dg/c90-hexfloat-2.c, for example.
Oh, well, then current status makes sense.
> It should be possible to lex according to the selected standard, but track
> that a pp-token could be a hex float together with the following two
> pp-tokens (+ or - and the exponent with possible suffix) and then handle
> things specially if that sequence of pp-tokens ends up getting converted
> to tokens.
Perhaps something simpler like this could be enough to inform naive users like
me?
Index: expr.c
===================================================================
--- expr.c (revision 233781)
+++ expr.c (working copy)
@@ -568,11 +568,26 @@ cpp_classify_number (cpp_reader *pfile,
{
if (DIGIT_SEP (*str))
SYNTAX_ERROR_AT (virtual_location,
"digit separator adjacent to exponent");
else
- SYNTAX_ERROR_AT (virtual_location, "exponent has no digits");
+ {
+ if (radix == 16 && !CPP_OPTION (pfile, extended_numbers))
+ {
+ const cpp_token *tok2 = cpp_get_token (parse_in);
+ const cpp_token *tok3 = cpp_get_token (parse_in);
+ if ((tok2 == CPP_MINUS || tok2 == CPP_PLUS)
+ && tok3 == CPP_NUMBER)
+ {
+ if (CPP_OPTION (pfile, cplusplus))
+ SYNTAX_ERROR_AT (virtual_location, "hexadecimal
floating constant with signed exponent requires C99");
+ else
+ SYNTAX_ERROR_AT (virtual_location, "hexadecimal
floating constant with signed exponent requires C++1z");
+ }
+ }
+ SYNTAX_ERROR_AT (virtual_location, "exponent has no
digits");
+ }
}
do
{
seen_digit_sep = DIGIT_SEP (*str);
str++;
It would be better to say:
prog.cc:1:10: error: hexadecimal floating constant with signed exponent
requires C++1z
auto d = 0x123p-2;
~~~~~~^~
but I have no idea how to create ranges dynamically in the new rich_loc world.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70529] Unhelpful diagnostic for hex float literals, inconsistent parsing
Date: Thu, 07 Apr 2016 20:47:00 -0000
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
But that wouldn't make any difference between 0x123p-2 and 0x123p - 2
(or some of them coming from macro, other not etc.).
So perhaps you want to also check the locus of each of the tokens and find out
if they are actually consecutive in the source.
>From gcc-bugs-return-521500-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 21:07:28 2016
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From: "andres.tiraboschi at tallertechnologies dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70584] constexpr variables cannot be used as intrinsic arguments where an immediate is expected
Date: Thu, 07 Apr 2016 21:07:00 -0000
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--- Comment #2 from Andrés AgustÃn Tiraboschi <andres.tiraboschi at tallertechnologies dot com> ---
#include <wmmintrin.h>
int main()
{
__m128i r;
constexpr auto index = 1;
enum {index2 = index};
r = _mm_aeskeygenassist_si128(r, index2);
}
This works also.
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/60751] Extra comma in WRITE statement not diagnosed
Date: Thu, 07 Apr 2016 21:12:00 -0000
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--- Comment #17 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Note that the extra comma is used in the following tests:
gfortran.dg/array_constructor_49.f90
gfortran.dg/integer_exponentiation_6.F90
gfortran.dg/graphite/pr38083.f90
Any reason to keep it?
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Subject: [Bug fortran/66643] Missing compilation error for formatted data transfer without format
Date: Thu, 07 Apr 2016 21:14:00 -0000
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--- Comment #6 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Note the extra comma in gfortran.dg/integer_exponentiation_6.F90 (see pr60751).
Any reason to keep it?
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Subject: [Bug c++/70529] Unhelpful diagnostic for hex float literals, inconsistent parsing
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--- Comment #7 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #6)
> But that wouldn't make any difference between 0x123p-2 and 0x123p - 2
> (or some of them coming from macro, other not etc.).
> So perhaps you want to also check the locus of each of the tokens and find
> out if they are actually consecutive in the source.
Hm, true. That seems more complicated. Possible, but too complicated for me
right now. Perhaps Axel wants to give it a try if he thinks it is important
enough.
Otherwise, perhaps worth mentioning that signed hexadecimal floats are only
available in C++1z in porting_to.html.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug testsuite/70581] [6 regression] gcc.dg/lto/simd-function FAILs
Date: Thu, 07 Apr 2016 21:46:00 -0000
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Apr 7 21:45:26 2016
New Revision: 234817
URL: https://gcc.gnu.org/viewcvs?rev=234817&root=gcc&view=rev
Log:
PR testsuite/70581
* gcc.dg/lto/simd-function_0.c: New test.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/lto/simd-function_0.c
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From: "manu at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70529] Unhelpful diagnostic for hex float literals, inconsistent parsing
Date: Thu, 07 Apr 2016 21:57:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70529
--- Comment #8 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
(In reply to Axel Naumann from comment #2)
> You asked for it, so here is my wish list:
> - for C++ < 1z, do not support hexfloats, neither with "unsigned" not
> negative exponents.
Since "unsigned" exponents are supported by standard C++11, g++ has to support
them.
> Or support both, as a GCC extention that's enabled by
> default - like in the GCC 5 times.
Given Joseph comments, it seems the "signed" extension is incompatible with
standard C++ < 1z. That is, the same valid program may behave differently
whether the extension is enabled or not.
> - if you remove support for C++ < 1z, state that hexfloats are unsupported
> in C++ < 1z.
Only "signed" exponents are unsupported. My patch above tries to catch this
case and give a better error message, but it is not as trivial as I thought.
> NB: Even if I would buy into the argument that diagnostics are limited by
> the tokens, I don't yet see why 'P' ends up being concated to the pp-number
> token in C++ < 1z.
You have to run g++ (actually, cc1plus) under a debugger to see why. See
lex_number. Doing it in a different way would probably break a lot of other
things.
>From gcc-bugs-return-521506-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 22:16:24 2016
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From: "anlauf at gmx dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/69654] ICE in gfc_trans_structure_assign
Date: Thu, 07 Apr 2016 22:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69654
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> ---
Slightly reduced test case:
Module foo_pointers_class
implicit none
type :: ty_foo_pointers
class(*),pointer :: foo => NULL()
end type ty_foo_pointers
type :: ty_class_basis
end type ty_class_basis
End Module foo_pointers_class
Module foo_class
use foo_pointers_class
implicit none
type,extends(ty_class_basis) :: ty_foo2
type(ty_foo_pointers) :: foo
end type ty_foo2
End Module foo_class
Module foo_scripts_mod
use foo_class, only: ty_foo2
implicit none
contains
subroutine foo_script1
type(ty_foo2) :: foo2
Call foo_init2(foo2)
end subroutine foo_script1
subroutine foo_init2(self)
type(ty_foo2),target :: self
end subroutine foo_init2
End Module foo_scripts_mod
The ICE goes away when the pointer initialization is removed.
I think there are similar (related?) PRs.
>From gcc-bugs-return-521507-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 22:21:15 2016
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From: "joseph at codesourcery dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70529] Unhelpful diagnostic for hex float literals, inconsistent parsing
Date: Thu, 07 Apr 2016 22:21:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70529
--- Comment #9 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
On Thu, 7 Apr 2016, manu at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70529
>
> --- Comment #8 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
> (In reply to Axel Naumann from comment #2)
> > You asked for it, so here is my wish list:
> > - for C++ < 1z, do not support hexfloats, neither with "unsigned" not
> > negative exponents.
>
> Since "unsigned" exponents are supported by standard C++11, g++ has to support
> them.
They aren't supported in the sense of being valid floating-literals.
It's simply the case that if the 'p' or 'P' is followed by a digit, rather
than by '+' or '-', then it forms part of the pp-number whatever standard
version is in use (and so none of the lexical complications arise that
occur in the p+ / p- / P+ / P- cases, so handling p<digit> as an extension
is easy).
>From gcc-bugs-return-521508-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 22:34:28 2016
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From: "rs2740 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70587] New: 0e1_p+0 should not be parsed as a single pp-number in C++14 and earlier
Date: Thu, 07 Apr 2016 22:34:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70587
Bug ID: 70587
Summary: 0e1_p+0 should not be parsed as a single pp-number in
C++14 and earlier
Product: gcc
Version: 6.0
Status: UNCONFIRMED
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p/P followed by +/- is not part of the pp-number production in C++ before
C++17, but GCC includes them anyway. This results in the following code being
erroneously rejected in C++11/14 mode:
long double operator""_p(long double) { return {}; }
auto x = 0e1_p+0; // should be parsed as 0e1_p + 0
// but parsed as a single pp-number instead and rejected
>From gcc-bugs-return-521509-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 23:04:11 2016
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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++/70588] New: [5/6 regression] SIGBUS on a VLA larger than SIZE_MAX / 2
Date: Thu, 07 Apr 2016 23:04:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70588
Bug ID: 70588
Summary: [5/6 regression] SIGBUS on a VLA larger than SIZE_MAX
/ 2
Product: gcc
Version: 6.0
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Similarly to bug 69517, r218655 (partially) removed from G++ support for
"Runtime-sized arrays with automatic storage duration" specified in WG21 N3639
(http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2013/n3639.html), leaving
only support for ordinary C VLAs. The support, introduced in r198745 and
available in GCC 4.9, included limited detection of common VLA errors such as
overflow in the VLA bounds. When compiled with GCC 4.9 in c++1y mode the
program below is instrumented by GCC to detect the overflow and throw an
exception. However, when compiled with GCC 5 or 6, the same program either
crashes at runtime due to the stack overflow or simply runs to completion.
This is not a new or surprising discovery but because the problem is distinct
from bug 69517 I raise a separate bug for it for the record.
$ cat v.c && /home/msebor/build/gcc-4.9.3/gcc/xg++
-B/home/msebor/build/gcc-4.9.3/gcc -L
/home/msebor/build/gcc-4.9.3/x86_64-unknown-linux-gnu/libstdc++-v3/src/.libs
-O2 -Wall -Wextra -Wpedantic -std=c++1y -xc++ v.c && ./a.out
void g (void*) { }
void f (__SIZE_TYPE__ n)
{
char a[n];
g (a);
}
int main ()
{
volatile __SIZE_TYPE__ n = __SIZE_MAX__ / 2 + 1;
try {
f (n);
__builtin_printf ("VLA bounds overflow failed to throw\n");
}
catch (...) {
__builtin_printf ("VLA bounds overflow detected\n");
}
}
VLA bounds overflow detected
$ ~/bin/gcc-5.1.0/bin/g++ -O2 -Wall -Wextra -Wpedantic -std=c++14 -xc++ v.c &&
./a.out
v.c: In function ‘void f(long unsigned int)’:
v.c:5:13: warning: ISO C++ forbids variable length array ‘a’ [-Wvla]
char a[n];
^
VLA bounds overflow failed to throw
$ ~/bin/gcc-5.1.0/bin/g++ -Wall -Wextra -Wpedantic -std=c++14 -xc++ v.c &&
./a.out
v.c: In function ‘void f(long unsigned int)’:
v.c:5:13: warning: ISO C++ forbids variable length array ‘a’ [-Wvla]
char a[n];
^
Bus error (core dumped)
>From gcc-bugs-return-521510-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 23:18:44 2016
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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++/70588] [5/6 regression] SIGBUS on a VLA larger than SIZE_MAX / 2
Date: Thu, 07 Apr 2016 23:18:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70588
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Known to work| |4.9.3
Keywords| |wrong-code
Last reconfirmed| |2016-04-07
Assignee|unassigned at gcc dot gnu.org |msebor at gcc dot gnu.org
Depends on| |69517
Ever confirmed|0 |1
Known to fail| |5.3.0, 6.0
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
I'm marking this bug as dependent on bug 69517 since it makes sense to address
both at the same time and wouldn't do much good if one was fixed but not the
other. I'm also working on a patch for both bugs so I'm assigning it to
myself.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69517
[Bug 69517] [5/6 regression] SEGV on a VLA with excess initializer elements
>From gcc-bugs-return-521511-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 07 23:31:11 2016
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From: "meissner at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70589] New: PowerPC target attribute/pragma cannot set/disable -mfloat128
Date: Thu, 07 Apr 2016 23:31:00 -0000
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Bug ID: 70589
Summary: PowerPC target attribute/pragma cannot set/disable
-mfloat128
Product: gcc
Version: 6.0
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The new -mfloat128 support in PowerPC GCC 6 cannot be set via a target
attribute or a target pragma.
The reason for this is the __float128 and __ibm128 keywords must be created at
program initialization type complete with the appropriate types. If you change
the float128 setting to on from being off, the keywords are not created.
This was noticed that libgcc's emulation routines did not configure properly
when the default for -mfloat128 was set off for PR 70381.
As a work around, I will submit a patch shortly to disable -mfloat128 or
-mfloat128-hardware from being set via the target attribute or target pragma.
However, a longer term fix should be to make it work.
>From gcc-bugs-return-521512-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 00:42:07 2016
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Subject: [Bug c++/70587] 0e1_p+0 should not be parsed as a single pp-number in C++14 and earlier
Date: Fri, 08 Apr 2016 00:42:00 -0000
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
It's rejected in -std=gnu++11 and gnu++14 mode, but not -std=c++11 / c++14,
which agrees with the documentation for -std:
> when a GNU dialect of a standard is specified, all features supported by the compiler are enabled, even when those features change the meaning of the base standard. As a result, some strict-conforming programs may be rejected.
Hex literals have been supported as a GNU extension for many years, that's one
of the reasons they are being standardized for C++17.
>From gcc-bugs-return-521513-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 00:43:02 2016
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Subject: [Bug c++/70587] 0e1_p+0 should not be parsed as a single pp-number in C++14 and earlier
Date: Fri, 08 Apr 2016 00:43:00 -0000
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Once more, with line breaks:
when a GNU dialect of a standard is specified, all features supported by the
compiler are enabled, even when those features change the meaning of the base
standard. As a result, some strict-conforming programs may be rejected.
>From gcc-bugs-return-521514-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 00:45:50 2016
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Subject: [Bug c++/70587] 0e1_p+0 should not be parsed as a single pp-number in C++14 and earlier
Date: Fri, 08 Apr 2016 00:45:00 -0000
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TC <rs2740 at gmail dot com> changed:
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--- Comment #3 from TC <rs2740 at gmail dot com> ---
Bah, wrong version field. This should be against 5 (because I was using
Coliru), but I neglected to test 6.
>From gcc-bugs-return-521515-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 02:12:46 2016
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Subject: [Bug target/70117] ppc long double isinf() is wrong?
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--- Comment #17 from Alan Modra <amodra at gcc dot gnu.org> ---
Author: amodra
Date: Fri Apr 8 02:11:52 2016
New Revision: 234821
URL: https://gcc.gnu.org/viewcvs?rev=234821&root=gcc&view=rev
Log:
PR70117, ppc long double isinf
gcc/
PR target/70117
* builtins.c (fold_builtin_classify): For IBM extended precision,
look at just the high-order double to test for NaN.
(fold_builtin_interclass_mathfn): Similarly for Inf. For isnormal
test just the high double for Inf but both doubles for subnormal
limit.
gcc/testsuite/
* gcc.target/powerpc/pr70117.c: New.
Added:
trunk/gcc/testsuite/gcc.target/powerpc/pr70117.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/builtins.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug middle-end/70579] [gomp4] -O0 execution testing FAILs for libgomp.oacc-c-c++-common/host_data-1.c
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>From gcc-bugs-return-521517-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 06:37:55 2016
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Subject: [Bug middle-end/70580] [gomp4] -O0 execution testing FAILs for libgomp.oacc-c-c++-common/if-1.c
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>From gcc-bugs-return-521518-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 06:57:40 2016
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Subject: [Bug c++/70588] [5/6 regression] SIGBUS on a VLA larger than SIZE_MAX / 2
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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CC| |jakub at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
This IMNSHO doesn't qualify as a regression. It has been an experimental
feature that has been intentionally removed because it has been removed from
the standard.
>From gcc-bugs-return-521519-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 07:00:44 2016
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Subject: [Bug c++/70529] Unhelpful diagnostic for hex float literals, inconsistent parsing
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--- Comment #10 from Axel Naumann <gcc@axel-naumann.de> ---
(In reply to joseph@codesourcery.com from comment #9)
> On Thu, 7 Apr 2016, manu at gcc dot gnu.org wrote:
> It's simply the case that if the 'p' or 'P' is followed by a digit, rather
> than by '+' or '-', then it forms part of the pp-number whatever standard
> version is in use
See, and that's the part I cannot find in the standard. I don't see 'P' or 'p'
being part of a pp-number, according to [lex.ppnumber] in C++14. I don't see
0x123P2 being a valid pp-number in C++14.
(In reply to Manuel López-Ibáñez from comment #8)
> (In reply to Axel Naumann from comment #2)
> > NB: Even if I would buy into the argument that diagnostics are limited by
> > the tokens, I don't yet see why 'P' ends up being concated to the pp-number
> > token in C++ < 1z.
>
> You have to run g++ (actually, cc1plus) under a debugger to see why. See
> lex_number. Doing it in a different way would probably break a lot of other
> things.
I meant to say "I don't yet see why 'P' is *meant* to end up being concated to
the pp-number token in C++ < 1z."
>From gcc-bugs-return-521520-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 07:05:41 2016
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Subject: [Bug tree-optimization/68953] [6 Regression] [graphite] Wrong code w/ -O[12] -floop-nest-optimize
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vries at gcc dot gnu.org changed:
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Keywords| |patch
--- Comment #7 from vries at gcc dot gnu.org ---
https://gcc.gnu.org/ml/gcc-patches/2016-04/msg00373.html
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From: "trippels at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70590] New: [6 Regression] r234810 causes error: location references block not in block tree
Date: Fri, 08 Apr 2016 07:07:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70590
Bug ID: 70590
Summary: [6 Regression] r234810 causes error: location
references block not in block tree
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: trippels at gcc dot gnu.org
CC: ppalka at gcc dot gnu.org
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Since r234810 Firefox doesn't build anymore on ppc64le:
trippels@gcc2-power8 xslt % /home/trippels/gcc_test/usr/local/bin/c++ -c -w -O2
-std=gnu++0x txMozillaXMLOutput.ii
/home/trippels/gecko-dev/dom/xslt/xslt/txMozillaXMLOutput.cpp: In member
function ‘MozExternalRefCountType nsNodeInfoManager::Release()’:
/home/trippels/gecko-dev/dom/xslt/xslt/txMozillaXMLOutput.cpp:1081:1: error:
location references block not in block tree
}
^
&_cycleCollectorGlobal.D.86308
D.356459 = nsCycleCollectingAutoRefCnt::decr (D.356455, this,
&_cycleCollectorGlobal.D.86308, 0B);
/home/trippels/gecko-dev/dom/xslt/xslt/txMozillaXMLOutput.cpp:1081:1: internal
compiler error: verify_gimple failed
0x10b189e3 verify_gimple_in_cfg(function*, bool)
../../gcc/gcc/tree-cfg.c:5125
0x109ba45f execute_function_todo
../../gcc/gcc/passes.c:1958
0x109bb223 do_per_function
../../gcc/gcc/passes.c:1652
0x109bb42f execute_todo
../../gcc/gcc/passes.c:2010
Reducing...
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From: "dront78 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug translation/70591] New: add ability to use a fallback LANGUAGE variable instead of primary language
Date: Fri, 08 Apr 2016 07:37:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70591
Bug ID: 70591
Summary: add ability to use a fallback LANGUAGE variable
instead of primary language
Product: gcc
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based on
https://www.google.ru/search?q=gcc+use+LANGUAGE&ie=utf-8&oe=utf-8&gws_rd=cr&ei=_l4HV8aSKIaqswHfzqzoCA#q=gcc+localization
the localized output it seems very annoying to a lot of people including me )
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Subject: [Bug c++/70529] Unhelpful diagnostic for hex float literals, inconsistent parsing
Date: Fri, 08 Apr 2016 08:00:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70529
--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
pp-number:
digit
. digit
pp-number digit
pp-number identifier-nondigit
pp-number e sign
pp-number E sign
pp-number .
identifier-nondigit:
nondigit
universal-character-name
other implementation-defined characters
nondigit: one of
a b c d e f g h i j k l m
n o p q r s t u v w x y z
A B C D E F G H I J K L M
N O P Q R S T U V W X Y Z _
digit: one of
0 1 2 3 4 5 6 7 8 9
sign: one of
+ -
Thus
0x123P2
is valid pp-number, because it starts with a digit, is followed by nondigit,
then 3 times digit, then nondigit and then another digit, all matching the
above grammar. But 0x123P-2 is not a pp-number, because in the grammar
sign is only allowed after e or E letters.
0.123P2E-3E+3e-2E+2 is also a pp-number. After lexing this one is of course
rejected, because it is not a valid floating point constant.
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Subject: [Bug testsuite/70581] [6 regression] gcc.dg/lto/simd-function FAILs
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70581
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Should be fixed now. Yeah, if you as doesn't support AVX512-F, UNSUPPORTED is
the only thing we can do.
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Subject: [Bug fortran/70592] New: Addressing error in dynamically-allocated character array
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70592
Bug ID: 70592
Summary: Addressing error in dynamically-allocated character
array
Product: gcc
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Created attachment 38217
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38217&action=edit
failing test case
The attached code incorrectly prints '666666' as its last line instead of
'123456' apparently because the program thinks that the addresses of all
elements of the array are the same.
The compiler also produces the somewhat cryptic warning
CHARACTER(len=:), DIMENSION(:), POINTER :: cp
^
Warning: '.cp' is used uninitialized in this function [-Wuninitialized]
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Subject: [Bug c++/70529] Unhelpful diagnostic for hex float literals, inconsistent parsing
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--- Comment #12 from Axel Naumann <gcc@axel-naumann.de> ---
Thanks for explaining, Jakub - I missed the identifier-nondigit.
Then it's really a matter of making the diagnostic more informative.
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Subject: [Bug middle-end/70579] [gomp4] -O0 execution testing FAILs for libgomp.oacc-c-c++-common/host_data-1.c
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--- Comment #1 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
Author: tschwinge
Date: Fri Apr 8 08:31:40 2016
New Revision: 234823
URL: https://gcc.gnu.org/viewcvs?rev=234823&root=gcc&view=rev
Log:
[PR testsuite/70579, PR testsuite/70580] Fix test cases failing because of the
compiler's "avoid offloading" decision
libgomp/
PR testsuite/70579
PR testsuite/70580
* testsuite/libgomp.oacc-c-c++-common/host_data-1.c: Initialize
the runtime for acc_device_nvidia.
* testsuite/libgomp.oacc-c-c++-common/if-1.c: Cope with
"avoid offloading" situation.
* libgomp.texi (Enabling OpenACC): Elaborate on interactions of
"avoid offloading".
Modified:
branches/gomp-4_0-branch/libgomp/ChangeLog.gomp
branches/gomp-4_0-branch/libgomp/libgomp.texi
branches/gomp-4_0-branch/libgomp/testsuite/libgomp.oacc-c-c++-common/host_data-1.c
branches/gomp-4_0-branch/libgomp/testsuite/libgomp.oacc-c-c++-common/if-1.c
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Subject: [Bug middle-end/70580] [gomp4] -O0 execution testing FAILs for libgomp.oacc-c-c++-common/if-1.c
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--- Comment #1 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
Author: tschwinge
Date: Fri Apr 8 08:31:40 2016
New Revision: 234823
URL: https://gcc.gnu.org/viewcvs?rev=234823&root=gcc&view=rev
Log:
[PR testsuite/70579, PR testsuite/70580] Fix test cases failing because of the
compiler's "avoid offloading" decision
libgomp/
PR testsuite/70579
PR testsuite/70580
* testsuite/libgomp.oacc-c-c++-common/host_data-1.c: Initialize
the runtime for acc_device_nvidia.
* testsuite/libgomp.oacc-c-c++-common/if-1.c: Cope with
"avoid offloading" situation.
* libgomp.texi (Enabling OpenACC): Elaborate on interactions of
"avoid offloading".
Modified:
branches/gomp-4_0-branch/libgomp/ChangeLog.gomp
branches/gomp-4_0-branch/libgomp/libgomp.texi
branches/gomp-4_0-branch/libgomp/testsuite/libgomp.oacc-c-c++-common/host_data-1.c
branches/gomp-4_0-branch/libgomp/testsuite/libgomp.oacc-c-c++-common/if-1.c
>From gcc-bugs-return-521530-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 08:35:32 2016
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Subject: [Bug middle-end/70593] [6 Regression] Miscompilation of xen starting with r226901
Date: Fri, 08 Apr 2016 08:35:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P1
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-08
Target Milestone|--- |6.0
Ever confirmed|0 |1
>From gcc-bugs-return-521529-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 08:35:15 2016
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Subject: [Bug middle-end/70593] New: [6 Regression] Miscompilation of xen starting with r226901
Date: Fri, 08 Apr 2016 08:35:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70593
Bug ID: 70593
Summary: [6 Regression] Miscompilation of xen starting with
r226901
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: jakub at gcc dot gnu.org
Target Milestone: ---
__attribute__((noinline, noclone)) unsigned long
foo (unsigned long x, unsigned long y, unsigned z)
{
unsigned long a, b, c, d = z;
asm volatile ("xorl\t%k1, %k1\n\txorl\t%k2, %k2\n\txorl\t%k3,
%k3\n\tmovl\t$7, %k0"
: "=&c" (d), "=&D" (a), "=&S" (b), "=&r" (c) : "0" (d), "1"
(x), "2" (y), "3" (d) : "memory");
return d;
}
int
main ()
{
if (foo (1, 2, 3) != 7)
__builtin_abort ();
return 0;
}
is miscompiled on x86_64-linux at -O2 starting with r226901, -O2
-fno-tree-coalesce-vars works. The return value d is in %rcx at the end of the
inline asm, but with -O2 the copy of %rcx to %rax is lost.
>From gcc-bugs-return-521531-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 08:38:49 2016
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Subject: [Bug testsuite/70579] [gomp4] -O0 execution testing FAILs for libgomp.oacc-c-c++-common/host_data-1.c
Date: Fri, 08 Apr 2016 08:38:00 -0000
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Thomas Schwinge <tschwinge at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Component|middle-end |testsuite
Resolution|--- |FIXED
--- Comment #2 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
.
>From gcc-bugs-return-521532-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 08:39:07 2016
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Subject: [Bug testsuite/70580] [gomp4] -O0 execution testing FAILs for libgomp.oacc-c-c++-common/if-1.c
Date: Fri, 08 Apr 2016 08:39:00 -0000
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Thomas Schwinge <tschwinge at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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Resolution|--- |FIXED
--- Comment #2 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
.
>From gcc-bugs-return-521533-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 08:47:26 2016
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/70593] [6 Regression] Miscompilation of xen starting with r226901
Date: Fri, 08 Apr 2016 08:47:00 -0000
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Simplified testcase:
__attribute__((noinline, noclone)) unsigned long
foo (unsigned x)
{
unsigned long a, c = x;
asm volatile ("xorl\t%k1, %k1\n\tmovl\t$7, %k0"
: "=c" (c), "=a" (a) : "0" (c), "1" (c) : "memory");
return c;
}
int
main ()
{
if (foo (3) != 7)
__builtin_abort ();
return 0;
}
The *.optimized dump looks good:
c_2 = (long unsigned int) x_1(D);
__asm__ __volatile__("xorl %k1, %k1
movl $7, %k0" : "=c" c_5, "=a" a_6 : "0" c_2, "1" c_2 : "memory");
return c_5;
but in *.expand we have incorrect:
(note 1 0 4 NOTE_INSN_DELETED)
(note 4 1 2 2 [bb 2] NOTE_INSN_BASIC_BLOCK)
(insn 2 4 3 2 (set (reg/v:SI 88 [ x ])
(reg:SI 5 di [ x ])) pr70593.c:3 -1
(nil))
(note 3 2 6 2 NOTE_INSN_FUNCTION_BEG)
(insn 6 3 9 2 (set (reg/v:DI 87 [ <retval> ])
(zero_extend:DI (reg/v:SI 88 [ x ]))) pr70593.c:4 -1
(nil))
(insn 9 6 7 2 (parallel [
(set (reg:DI 89 [ c ])
(asm_operands/v:DI ("xorl %k1, %k1
movl $7, %k0") ("=c") 0 [
(reg/v:DI 87 [ <retval> ])
(reg/v:DI 87 [ <retval> ])
]
[
(asm_input:DI ("0") pr70593.c:5)
(asm_input:DI ("1") pr70593.c:5)
]
[] pr70593.c:5))
(set (reg:DI 90 [ a ])
(asm_operands/v:DI ("xorl %k1, %k1
movl $7, %k0") ("=a") 1 [
(reg/v:DI 87 [ <retval> ])
(reg/v:DI 87 [ <retval> ])
]
[
(asm_input:DI ("0") pr70593.c:5)
(asm_input:DI ("1") pr70593.c:5)
]
[] pr70593.c:5))
(clobber (mem:BLK (scratch) [0 A8]))
(clobber (reg:CCFP 18 fpsr))
(clobber (reg:CC 17 flags))
]) pr70593.c:5 -1
(nil))
(insn 7 9 8 2 (set (reg/v:DI 87 [ <retval> ])
(reg:DI 89 [ c ])) pr70593.c:5 -1
(nil))
(insn 8 7 13 2 (set (reg/v:DI 87 [ <retval> ])
(reg:DI 90 [ a ])) pr70593.c:5 -1
(nil))
(insn 13 8 14 2 (set (reg/i:DI 0 ax)
(reg/v:DI 87 [ <retval> ])) pr70593.c:7 -1
(nil))
(insn 14 13 0 2 (use (reg/i:DI 0 ax)) pr70593.c:7 -1
(nil))
insn 8 really shouldn't be there.
>From gcc-bugs-return-521534-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 08:53:30 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug preprocessor/69650] [6 Regression] ICE in linemap_line_start, at libcpp/line-map.c:803
Date: Fri, 08 Apr 2016 08:53:00 -0000
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--- Comment #44 from Roger Orr <rogero at howzatt dot demon.co.uk> ---
Created attachment 38218
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38218&action=edit
Intermediate file
I am as yet unable to upload the code for an example.
However, I've attached a file containing the generated line directives using
grep "#" rsMessaging.cxx.ii > lineDirectives
from one of the troublesome pre-processsed output files (rsMessaging.cxx.ii).
As far as I can tell the directives are correct.
The .ii file generates the following diagnostic when compiled:
$ /var/tmp/gcc-trunk-234481/install/bin/g++ -std=c++14 -O3 -Werror -c
rsMessaging.cxx.ii
In file included from
/opt/reactor-buildkit/B2BH-BK2GIT44-1/poco/include/Poco/Net/IPAddress.h:379:0,
from
/home/rorr/linuxdev109ws_9119/rorr_linuxdev109ws_9119/Reactor5/project/prj-lcc-device-longer-name/reactor/src/base/messaging/messaging/rsHintServerBase.hxx:18,
from
/home/rorr/linuxdev109ws_9119/rorr_linuxdev109ws_9119/Reactor5/project/prj-lcc-device-longer-name/reactor/src/base/messaging/src/rsMessaging.cxx:15:
/home/rorr/linuxdev109ws_9119/rorr_linuxdev109ws_9119/Reactor5/project/prj-lcc-device-longer-name/reactor/src/base/hxx/rsEnumMnemonic.hxx:117:165:
error: file
"/home/rorr/linuxdev109ws_9119/rorr_linuxdev109ws_9119/Reactor5/project/prj-lcc-device-longer-name/reactor/src/base/messaging/messaging/rsHintServerBase.hxx"
linemarker ignored due to incorrect nesting [-Werror]
^
/home/rorr/linuxdev109ws_9119/rorr_linuxdev109ws_9119/Reactor5/project/prj-lcc-device-longer-name/reactor/src/base/hxx/rsEnumMnemonic.hxx:212:154:
error: file
"/home/rorr/linuxdev109ws_9119/rorr_linuxdev109ws_9119/Reactor5/project/prj-lcc-device-longer-name/reactor/src/base/messaging/src/rsMessaging.cxx"
linemarker ignored due to incorrect nesting [-Werror]
cc1plus: all warnings being treated as errors
>From gcc-bugs-return-521535-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 09:02:09 2016
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Subject: [Bug tree-optimization/68756] [6 Regression] ICE w/ -O1 -floop-nest-optimize and isl 0.15: isl-0.15/isl_id.c:213: unable to find id
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68756
vries at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-08
CC| |vries at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #4 from vries at gcc dot gnu.org ---
Confirmed with r231093 (2015-12-01 daily bump revision)
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From: "burnus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70594] New: [6 Regression] -fcompare-debug failure
Date: Fri, 08 Apr 2016 09:11:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70594
Bug ID: 70594
Summary: [6 Regression] -fcompare-debug failure
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: burnus at gcc dot gnu.org
CC: ppalka at gcc dot gnu.org
Target Milestone: ---
No example as I failed to reduce one; I also tried to use a reduced set of
flags; this set worked on the original file - but not on the delta-reduced
file. All of those point to a memory-related issue. Interestingly, with
-save-temps it didn't occur while w/o -save-temps, the result differed as
follows (two lines shifted down by five lines):
--- /tmp/ccRrTlry.gkd 2016-04-08 09:12:27.463899521 +0200
+++ /tmp/ccV2i7s5.gk.gkd 2016-04-08 09:12:35.739842097 +0200
@@ -74901,2 +74900,0 @@
-29: void yyreduce = <<< error >>>;
-1861: void yyerrlab = <<< error >>>;
@@ -74906,0 +74905,2 @@
+29: void yyreduce = <<< error >>>;
+1861: void yyerrlab = <<< error >>>;
Bisecting GCC points to Patrick Palka's commit r234753:
Fix PR c++/70452 (regression in C++ parsing performance)
gcc/cp/ChangeLog:
PR c++/70452
* constexpr.c (struct fundef_copy): New struct.
(struct fundef_copies_table_t): New struct.
(fundef_copies_table): New static variable.
(maybe_initialize_fundef_copies_table): New static function.
(get_fundef_copy): New static function.
(save_fundef_copy): New static function.
(cxx_eval_call_expression): Use get_fundef_copy, and
save_fundef_copy.
(constexpr_call_table): Add "deletable" GTY marker.
gcc/testsuite/ChangeLog:
PR c++/70452
* g++.dg/ext/constexpr-vla4.C: New test.
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Subject: [Bug c++/70594] [6 Regression] -fcompare-debug failure
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Tobias Burnus <burnus at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |6.0
>From gcc-bugs-return-521538-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 09:17:25 2016
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From: "rogero at howzatt dot demon.co.uk" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug preprocessor/69650] [6 Regression] ICE in linemap_line_start, at libcpp/line-map.c:803
Date: Fri, 08 Apr 2016 09:17:00 -0000
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--- Comment #45 from Roger Orr <rogero at howzatt dot demon.co.uk> ---
While investigating the problem I am experiencing I have found it is stable
across g++ builds - I have tried a build using revision 234741 which has the
identical diagnostic output from the compilation.
However, small changes to the source code -- such as changing the length of the
directory paths involved -- can change whether or not the diagnostic is
produced.
In the example I posted, if I change path "/home/rorr/linuxdev109ws_9119/..."
to "/home/rorr/..." in the line directives of the ii file the compilation
succeeds without problem.
Hence it is not clear to me whether this diagnostic is the root problem or
merely a symptom of a different problem - possibly a memory overwrite or use of
an uninitialised variable whose value depends on the history of the memory
location.
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Subject: [Bug middle-end/70593] [6 Regression] Miscompilation of xen starting with r226901
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |aoliva at gcc dot gnu.org,
| |bernds at gcc dot gnu.org,
| |law at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Conflict graph:
After sorting:
Sorted Coalesce list:
(10000, 0) c_2 <-> c_5
(10000, 0) c_2 <-> a_6
(10000, 0) c_5 <-> _7(D)
Partition map
Partition 0 (x_1(D) - 1 )
Partition 1 (c_2 - 2 )
Partition 2 (c_5 - 5 )
Partition 3 (a_6 - 6 )
Partition 4 (_7(D) - 7 )
Coalesce list: (2)c_2 & (5)c_5 [map: 1, 2] : Success -> 1
Coalesce list: (2)c_2 & (6)a_6 [map: 1, 3] : Success -> 1
Coalesce list: (5)c_2 & (7)_7(D) [map: 1, 4] : Success -> 1
After Coalescing:
Partition map
Partition 0 (x_1(D) - 1 )
Partition 1 (c_2 - 2 5 6 7 )
There should be some conflict that a_6 and c_5 can't be in the same partitions,
they are different vars, and used in different asm outputs. But guess what
confuses the coalesce handling is that that have matching constraint and the
same value in those.
Perhaps just build_ssa_conflict_graph isn't ready to handle statements with
multiple SSA_OP_DEFs (where we need to arrange for conflicts in between the
partitions in different outputs)?
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Subject: [Bug target/70566] [4.9/5/6 Regression] Bad ARM code generated for evaluating unsigned int bitfield value
Date: Fri, 08 Apr 2016 09:40:00 -0000
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--- Comment #10 from ktkachov at gcc dot gnu.org ---
Author: ktkachov
Date: Fri Apr 8 09:39:44 2016
New Revision: 234825
URL: https://gcc.gnu.org/viewcvs?rev=234825&root=gcc&view=rev
Log:
[ARM] PR target/70566 Check that condition register is dead in tst-imm ->
lsls-imm Thumb2 peepholes
PR target/70566
* config/arm/thumb2.md (tst + branch-> lsls + branch
peephole below *orsi_not_shiftsi_si): Require that condition
register is dead after the peephole.
(second peephole after the above): Likewise.
* gcc.c-torture/execute/pr70566.c: New test.
Added:
trunk/gcc/testsuite/gcc.c-torture/execute/pr70566.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/arm/thumb2.md
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/70594] [6 Regression] -fcompare-debug failure
Date: Fri, 08 Apr 2016 09:41:00 -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> ---
Without the testcase it is hard to guess.
But one guess is that if in case of GC the cache is wiped and recreating it may
create something -fcompare-debug cares about (e.g. creation of new decls - we
care not about exact values of DECL_UID, but about their order), then the
deletable cache is a serious problem, because with -g and with -g0 there is
likely different amount of memory used, which means ggc_collect at different
times and thus we could be using the cache successfully with -g and not without
-g or vice versa.
>From gcc-bugs-return-521542-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 09:42:18 2016
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From: "ktkachov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70566] [4.9/5] Bad ARM code generated for evaluating unsigned int bitfield value
Date: Fri, 08 Apr 2016 09:42:00 -0000
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ktkachov at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |6.0
Summary|[4.9/5/6 Regression] Bad |[4.9/5] Bad ARM code
|ARM code generated for |generated for evaluating
|evaluating unsigned int |unsigned int bitfield value
|bitfield value |
Known to fail|6.0 |
--- Comment #11 from ktkachov at gcc dot gnu.org ---
Fixed on trunk.
The patch backports cleanly to 4.9 and 5 branches and bootstrap and test looks
good.
I'll ask for a backport after a bit of time on trunk
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Subject: [Bug c++/70594] [6 Regression] -fcompare-debug failure
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Perhaps a way to reduce this (though not as a -fcompare-debug failure) would be
to see if on the original testcase you get different code generation or
different -fdump-final-insns= dump between normal GC parameters and additional
--param ggc-min-expand=0 --param ggc-min-heapsize=0
Though it would be best to verify first if before the problematic commit you
get the same code generation (and same -fdump-final-insns=).
>From gcc-bugs-return-521544-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 10:24:41 2016
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Subject: [Bug middle-end/70593] [6 Regression] Miscompilation of xen starting with r226901
Date: Fri, 08 Apr 2016 10:24:00 -0000
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
And there is another thing special on this testcase - a_6 has zero uses, so
isn't live.
If both the values would be live after the asm, there would be an conflict
added, even during the SSA_OP_DEF processing of one of the defs vs. the other
one.
So, I see generally two solutions: ensure conflict between multiple SSA_OP_DEFs
of GIMPLE_ASM even if they aren't live, or during expansion for output operands
of GIMPLE_ASM which have zero uses don't try to move them to any pseudo etc.
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Subject: [Bug sanitizer/70541] unnoticed invalid dereference when using address sanitizer
Date: Fri, 08 Apr 2016 10:47:00 -0000
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--- Comment #5 from chefmax at gcc dot gnu.org ---
Author: chefmax
Date: Fri Apr 8 10:46:13 2016
New Revision: 234827
URL: https://gcc.gnu.org/viewcvs?rev=234827&root=gcc&view=rev
Log:
2016-04-08 Maxim Ostapenko <m.ostapenko@samsung.com>
PR sanitizer/70541
* asan.c (instrument_derefs): If we get unknown location, extract it
with EXPR_LOCATION.
(maybe_instrument_call): Instrument gimple_call's arguments if needed.
* c-c++-common/asan/pr70541.c: New test.
Added:
trunk/gcc/testsuite/c-c++-common/asan/pr70541.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/asan.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-521546-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 11:05:18 2016
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Subject: [Bug testsuite/70595] New: Cilk Plus testsuite needs massive cleanup
Date: Fri, 08 Apr 2016 11:05:00 -0000
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Bug ID: 70595
Summary: Cilk Plus testsuite needs massive cleanup
Product: gcc
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Prompted by the tentative patch to support SPARC in libcilkrts (PR
target/68945),
I looked into the current Cilk Plus testsuite and found tons of issues, way
beyond
what it takes to support a new target:
* Every single execution test explicitly lists the targets to run on, often
even
twice (in the dg-do target selector and then again when adding -lcilkrts via
dg-options). This is completely unmaintainable and should be replaced by a
target selector. I'm using the current check_libcilkrts_available, renamed
to
cilkplus_runtime, for thta purpose. There's no need to add -lcilkrts at all;
-fcilkplus already does this when linking.
* Two tests (c-c++-common/cilk-plus/CK/pr63307.c and
c-c++-common/cilk-plus/SE/ef_error3.c)
are pure compile tests and don't need a target selector at all.
* This only leaves us with c-c++-common/cilk-plus/SE/ef_error2.c, where the
expected
warning is x86-specific, thus the target selector needs to stay.
With those changes and the cleaned-up sparc port, I could successfully run the
cilk-plus testsuite on Solaris/SPARC, too.
But there's more cleanup possible/necessary:
* Two tests (c-c++-common/cilk-plus/AN/decl-ptr-colon.c and
c-c++-common/cilk-plus/AN/vla.c)
live in a common directory, but are restricted to target c. Unless someone
can educate me otherwise, they simply should be moved to gcc.dg/cilk-plus,
losing the target selector.
* Every since testcase is compiled/linked with -fcilkplus, most (all?) of them
specifying this explicitly via ad-options. This is plain silly and should be
moved into the framework.
* Many tests are run at several optimization levels. This cries for using
the torture framework instead of doing it explicitly.
There may be more, but that's what I've found so far. I'm attaching my current
patch for reference, but this is clearly gcc-7 material.
Rainer
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Subject: [Bug testsuite/70595] Cilk Plus testsuite needs massive cleanup
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--- Comment #1 from Rainer Orth <ro at gcc dot gnu.org> ---
Created attachment 38219
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38219&action=edit
Initial patch
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Subject: [Bug testsuite/70595] Cilk Plus testsuite needs massive cleanup
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Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2016-04-08
Assignee|unassigned at gcc dot gnu.org |ro at gcc dot gnu.org
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Ever confirmed|0 |1
--- Comment #2 from Rainer Orth <ro at gcc dot gnu.org> ---
Mine.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70590] [6 Regression] r234810 causes error: location references block not in block tree
Date: Fri, 08 Apr 2016 11:09:00 -0000
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
trippels@gcc2-power8 xslt % cat txMozillaXMLOutput.ii
struct nsCycleCollectionParticipant;
struct A {
void incr(void *, nsCycleCollectionParticipant *);
void decr(void *, nsCycleCollectionParticipant *);
};
template <class T> struct B {
T *assign_with_AddRef_aRawPtr;
T *assign_assuming_AddRef_oldPtr;
void operator=(T *) {
assign_with_AddRef_aRawPtr->AddRef();
assign_assuming_AddRef_oldPtr->Release();
}
};
struct nsCycleCollectionParticipant {};
struct C {
struct cycleCollection : nsCycleCollectionParticipant {
static constexpr nsCycleCollectionParticipant *GetParticipant() {
return &_cycleCollectorGlobal;
}
} static _cycleCollectorGlobal;
void AddRef() { mRefCnt.incr(0, cycleCollection::GetParticipant()); }
void Release() { mRefCnt.decr(0, cycleCollection::GetParticipant()); }
A mRefCnt;
};
struct D {
D(bool);
B<C> mNodeInfoManager;
};
D::D(bool) { mNodeInfoManager = 0; }
trippels@gcc2-power8 xslt % c++ -c -O2 txMozillaXMLOutput.ii
txMozillaXMLOutput.ii: In member function ‘void C::AddRef()’:
txMozillaXMLOutput.ii:29:36: error: location references block not in block tree
D::D(bool) { mNodeInfoManager = 0; }
^
&_cycleCollectorGlobal
A::incr (D.2923, 0B, &_cycleCollectorGlobal);
txMozillaXMLOutput.ii:29:36: internal compiler error: verify_gimple failed
0x10b189e3 verify_gimple_in_cfg(function*, bool)
../../gcc/gcc/tree-cfg.c:5125
0x109ba45f execute_function_todo
../../gcc/gcc/passes.c:1958
0x109bb223 do_per_function
../../gcc/gcc/passes.c:1652
0x109bb42f execute_todo
../../gcc/gcc/passes.c:2010
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Subject: [Bug c++/70590] [6 Regression] r234810 causes error: location references block not in block tree
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
location references block not in block tree generally means insufficient
unsharing, where some function that got through gimple-low.c where
TREE_SET_BLOCK has been used on some of the trees is sharing trees with a
different function.
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Subject: [Bug middle-end/70593] [6 Regression] Miscompilation of xen starting with r226901
Date: Fri, 08 Apr 2016 11:15:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70593
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 38220
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38220&action=edit
gcc6-pr70593.patch
Untested fix.
>From gcc-bugs-return-521552-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 11:18:47 2016
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From: "ro at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/68945] enable libcilkrts on SPARC
Date: Fri, 08 Apr 2016 11:18:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68945
Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
CC| |ro at gcc dot gnu.org
Depends on| |70595
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Target Milestone|--- |7.0
--- Comment #5 from Rainer Orth <ro at gcc dot gnu.org> ---
Since Stefan hasn't followed up and I'm currently looking at other libcilkrts
issues
anyway, I'm taking over from here.
I think I've addressed all review comments. The necessary testsuite changes
have been split out into PR testsuite/70595.
I'm attaching my current patch, which allows all cilk-plus testcases to PASS
on 32-bit Solaris 12/SPARC. The picture is different for 64-bit, though, where
a couple of the execution tests FAIL in a way I cannot yet make sense of: they
all
die with SIGBUS like this:
Thread 2 received signal SIGSEGV, Segmentation fault.
[Switching to Thread 1 (LWP 1)]
0xffffffff7f614d14 in elf_rtbndr () from /usr/lib/sparcv9/ld.so.1
(gdb) where
#0 0xffffffff7f614d14 in elf_rtbndr () from /usr/lib/sparcv9/ld.so.1
#1 0xffffffff7efd8e6c in _ti_bind_clear () from /lib/64/libc.so.1
#2 0xffffffff7f6335e8 in elf_bndr () from /usr/lib/sparcv9/ld.so.1
I suspect this is due to libcilkrts messing around with the internals of
a __builtin_setjmp/__builtin_longjmp jmpbuf in
libcilkplus/runtime/cilk_fiber-unix.cpp (cilk_fiber_sysdep::run), but haven't
yet pinpointed what's actually
wrong. Calls for more investigation.
Rainer
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70595
[Bug 70595] Cilk Plus testsuite needs massive cleanup
>From gcc-bugs-return-521553-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 11:19:51 2016
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Subject: [Bug target/68945] enable libcilkrts on SPARC
Date: Fri, 08 Apr 2016 11:19:00 -0000
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Rainer Orth <ro at gcc dot gnu.org> changed:
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is obsolete| |
--- Comment #6 from Rainer Orth <ro at gcc dot gnu.org> ---
Created attachment 38221
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38221&action=edit
Cleaned-up patch
>From gcc-bugs-return-521554-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 11:32:54 2016
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From: "zsojka at seznam dot cz" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/70596] New: [6 Regression] -fcompare-debug failure with one extra NOTE_INSN_DELETED
Date: Fri, 08 Apr 2016 11:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70596
Bug ID: 70596
Summary: [6 Regression] -fcompare-debug failure with one extra
NOTE_INSN_DELETED
Product: gcc
Version: unknown
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Priority: P3
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Target: x86_64-pc-linux-gnu
Created attachment 38222
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38222&action=edit
reduced testcase
Compiler output:
$ gcc testcase.c -O2 -fno-dce -fschedule-insns -fno-tree-coalesce-vars
-fno-tree-dce -fno-tree-fre -fno-tree-pre -fcompare-debug -mavx512f
x86_64-pc-linux-gnu-gcc: error: testcase.c: -fcompare-debug failure (length)
$ diff -u testcase*gkd
@@ -648,7 +648,6 @@
(note # 0 0 NOTE_INSN_DELETED)
(note # 0 0 NOTE_INSN_DELETED)
(note # 0 0 NOTE_INSN_DELETED)
-(note # 0 0 NOTE_INSN_DELETED)
(insn/f:TI # 0 0 2 (set (reg:DI 39 r10)
(plus:DI (reg/f:DI 7 sp)
(const_int 8 [0x8]))) testcase.c:5# {*leadi}
The .reload dump is the first one where is one more NOTE_INSN_DELETED.
$ grep -c NOTE_INSN_DELETED *.c.*
...
testcase.c.255r.ira:155
testcase.c.256r.reload:646
testcase.c.257r.postreload:646
...
testcase.c.gk.255r.ira:155
testcase.c.gk.256r.reload:647
testcase.c.gk.257r.postreload:647
...
>From gcc-bugs-return-521555-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 11:35:20 2016
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Subject: [Bug preprocessor/69650] [6 Regression] ICE in linemap_line_start, at libcpp/line-map.c:803
Date: Fri, 08 Apr 2016 11:35:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69650
--- Comment #46 from Bernd Schmidt <bernds at gcc dot gnu.org> ---
I tried compiling this file, with C or C++, with or without -fpreprocessed, all
sorts of options including -std=c++14 -O3, and did not get a compilation
failure.
Can anyone else reproduce this?
>From gcc-bugs-return-521556-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 11:53:51 2016
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From: "ppalka at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70590] [6 Regression] r234810 causes error: location references block not in block tree
Date: Fri, 08 Apr 2016 11:53:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70590
--- Comment #3 from Patrick Palka <ppalka at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #2)
> location references block not in block tree generally means insufficient
> unsharing, where some function that got through gimple-low.c where
> TREE_SET_BLOCK has been used on some of the trees is sharing trees with a
> different function.
That makes sense. So in cxx_eval_call_expression we should unconditionally
unshare the result of the call because the two caches (fundef_copies_table and
constexpr_call_table) may cause us to share the same trees in different
functions. Alternatively we can just call unshare_expr once in the top-level
cxx_eval_outermost_constant_expression, I think. Markus, does this patch fix
the build for you?
diff --git a/gcc/cp/constexpr.c b/gcc/cp/constexpr.c
index 7f4bb04..b2e27c1 100644
--- a/gcc/cp/constexpr.c
+++ b/gcc/cp/constexpr.c
@@ -4140,6 +4140,7 @@ cxx_eval_outermost_constant_expr (tree t, bool
allow_non_constant,
r = cxx_eval_constant_expression (&ctx, r,
false, &non_constant_p, &overflow_p);
+ r = unshare_expr (r);
verify_constant (r, allow_non_constant, &non_constant_p, &overflow_p);
>From gcc-bugs-return-521557-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 11:58:14 2016
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Subject: [Bug tree-optimization/68756] [6 Regression] ICE w/ -O1 -floop-nest-optimize and isl 0.15: isl-0.15/isl_id.c:213: unable to find id
Date: Fri, 08 Apr 2016 11:58:00 -0000
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--- Comment #5 from vries at gcc dot gnu.org ---
Failure no longer reproducible after r232812, "new scop schedule for isl-0.15"
>From gcc-bugs-return-521558-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 12:00:49 2016
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Subject: [Bug c++/70590] [6 Regression] r234810 causes error: location references block not in block tree
Date: Fri, 08 Apr 2016 12:00:00 -0000
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--- Comment #4 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
(In reply to Patrick Palka from comment #3)
> (In reply to Jakub Jelinek from comment #2)
> > location references block not in block tree generally means insufficient
> > unsharing, where some function that got through gimple-low.c where
> > TREE_SET_BLOCK has been used on some of the trees is sharing trees with a
> > different function.
>
> That makes sense. So in cxx_eval_call_expression we should unconditionally
> unshare the result of the call because the two caches (fundef_copies_table
> and constexpr_call_table) may cause us to share the same trees in different
> functions. Alternatively we can just call unshare_expr once in the
> top-level cxx_eval_outermost_constant_expression, I think. Markus, does
> this patch fix the build for you?
No. It now ICEs: in maybe_constant_value_1, at cp/constexpr.c:4328
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Subject: [Bug c++/70590] [6 Regression] r234810 causes error: location references block not in block tree
Date: Fri, 08 Apr 2016 12:04:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70590
--- Comment #5 from Patrick Palka <ppalka at gcc dot gnu.org> ---
(In reply to Markus Trippelsdorf from comment #4)
> (In reply to Patrick Palka from comment #3)
> > (In reply to Jakub Jelinek from comment #2)
> > > location references block not in block tree generally means insufficient
> > > unsharing, where some function that got through gimple-low.c where
> > > TREE_SET_BLOCK has been used on some of the trees is sharing trees with a
> > > different function.
> >
> > That makes sense. So in cxx_eval_call_expression we should unconditionally
> > unshare the result of the call because the two caches (fundef_copies_table
> > and constexpr_call_table) may cause us to share the same trees in different
> > functions. Alternatively we can just call unshare_expr once in the
> > top-level cxx_eval_outermost_constant_expression, I think. Markus, does
> > this patch fix the build for you?
>
> No. It now ICEs: in maybe_constant_value_1, at cp/constexpr.c:4328
What about just this instead?
diff --git a/gcc/cp/constexpr.c b/gcc/cp/constexpr.c
index 7f4bb04..7f485d2 100644
--- a/gcc/cp/constexpr.c
+++ b/gcc/cp/constexpr.c
@@ -1558,7 +1558,7 @@ cxx_eval_call_expression (const constexpr_ctx *ctx, tree
t,
}
pop_cx_call_context ();
- return unshare_constructor (result);
+ return unshare_expr (result);
}
/* FIXME speed this up, it's taking 16% of compile time on sieve testcase. */
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Subject: [Bug tree-optimization/68756] [6 Regression] ICE w/ -O1 -floop-nest-optimize and isl 0.15: isl-0.15/isl_id.c:213: unable to find id
Date: Fri, 08 Apr 2016 12:06:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68756
--- Comment #6 from Arseny Solokha <asolokha at gmx dot com> ---
(In reply to vries from comment #5)
> Failure no longer reproducible after r232812, "new scop schedule for
> isl-0.15"
There are four snippets in this PR. All except the first one (snippet 1 from
#c0) are still reproducible w/ gcc-6.0.0-alpha20160403.
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Subject: [Bug c++/70498] Libiberty Demangler segfaults (3)
Date: Fri, 08 Apr 2016 12:07:00 -0000
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--- Comment #1 from Bernd Schmidt <bernds at gcc dot gnu.org> ---
Author: bernds
Date: Fri Apr 8 12:06:59 2016
New Revision: 234828
URL: https://gcc.gnu.org/viewcvs?rev=234828&root=gcc&view=rev
Log:
Handle an overflow case (PR70498, patch by Marcel Böhme).
PR c++/70498
* cplus-dem.c (gnu_special): Handle case where consume_count returns
-1.
Modified:
trunk/libiberty/ChangeLog
trunk/libiberty/cplus-dem.c
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Subject: [Bug go/70597] New: [6 Regression] cmd/go: deduplicate gccgo afiles by package path, not *Package
Date: Fri, 08 Apr 2016 12:08:00 -0000
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Bug ID: 70597
Summary: [6 Regression] cmd/go: deduplicate gccgo afiles by
package path, not *Package
Product: gcc
Version: 6.0
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see https://go-review.googlesource.com/#/c/21692/
fixes building the golang-goprotobuf package with gccgo, which worked with GCC
5.
original report at
https://bugs.launchpad.net/ubuntu/+source/gccgo-6/+bug/1566552
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Subject: [Bug c++/69687] Buffer Overflow in libiberty
Date: Fri, 08 Apr 2016 12:11:00 -0000
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--- Comment #12 from Bernd Schmidt <bernds at gcc dot gnu.org> ---
Author: bernds
Date: Fri Apr 8 12:10:21 2016
New Revision: 234829
URL: https://gcc.gnu.org/viewcvs?rev=234829&root=gcc&view=rev
Log:
Fix memory allocation size overflows (PR69687, patch by Marcel Böhme)
PR c++/69687
* cplus-dem.c: Include <limits.h> if available.
(INT_MAX): Define if necessary.
(remember_type, remember_Ktype, register_Btype, string_need):
Abort if we detect cases where we the size of the allocation would
overflow.
Modified:
trunk/libiberty/ChangeLog
trunk/libiberty/cplus-dem.c
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Subject: [Bug c++/70590] [6 Regression] r234810 causes error: location references block not in block tree
Date: Fri, 08 Apr 2016 12:12:00 -0000
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--- Comment #6 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
(In reply to Patrick Palka from comment #5)
> (In reply to Markus Trippelsdorf from comment #4)
> > (In reply to Patrick Palka from comment #3)
> > > (In reply to Jakub Jelinek from comment #2)
> > > > location references block not in block tree generally means insufficient
> > > > unsharing, where some function that got through gimple-low.c where
> > > > TREE_SET_BLOCK has been used on some of the trees is sharing trees with a
> > > > different function.
> > >
> > > That makes sense. So in cxx_eval_call_expression we should unconditionally
> > > unshare the result of the call because the two caches (fundef_copies_table
> > > and constexpr_call_table) may cause us to share the same trees in different
> > > functions. Alternatively we can just call unshare_expr once in the
> > > top-level cxx_eval_outermost_constant_expression, I think. Markus, does
> > > this patch fix the build for you?
> >
> > No. It now ICEs: in maybe_constant_value_1, at cp/constexpr.c:4328
>
> What about just this instead?
This one fixes the issue. Firefox now builds fine. Thanks.
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Subject: [Bug c++/69687] Buffer Overflow in libiberty
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Bernd Schmidt <bernds at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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CC| |bernds at gcc dot gnu.org
Resolution|--- |FIXED
--- Comment #13 from Bernd Schmidt <bernds at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug c++/70492] Libiberty Demangler segfaults (2)
Date: Fri, 08 Apr 2016 12:28:00 -0000
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Bernd Schmidt <bernds at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Bernd Schmidt <bernds at gcc dot gnu.org> ---
Fixed. Commit message went to a different PR unfortunately.
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Subject: [Bug c++/70498] Libiberty Demangler segfaults (3)
Date: Fri, 08 Apr 2016 12:29:00 -0000
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Bernd Schmidt <bernds at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |bernds at gcc dot gnu.org
--- Comment #2 from Bernd Schmidt <bernds at gcc dot gnu.org> ---
That was the commit for 70492, sorry.
>From gcc-bugs-return-521568-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 12:33:40 2016
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From: "rogero at howzatt dot demon.co.uk" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug preprocessor/69650] [6 Regression] ICE in linemap_line_start, at libcpp/line-map.c:803
Date: Fri, 08 Apr 2016 12:33:00 -0000
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--- Comment #47 from Roger Orr <rogero at howzatt dot demon.co.uk> ---
Sorry, I wasn't clear enough. I'm unfortunately not at present able to post the
whole source file.
The file I posted *only* contains the line directives, so people can confirm
whether there were any problems with them. (That file compiles fine for me too)
There seems to be some interaction with some other part of the compilation, I'm
trying to get a example I can post but this is proving troublesome.
>From gcc-bugs-return-521569-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 12:35:56 2016
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From: "ppalka at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70594] [6 Regression] -fcompare-debug failure
Date: Fri, 08 Apr 2016 12:35:00 -0000
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--- Comment #3 from Patrick Palka <ppalka at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #1)
> Without the testcase it is hard to guess.
> But one guess is that if in case of GC the cache is wiped and recreating it
> may create something -fcompare-debug cares about (e.g. creation of new decls
> - we care not about exact values of DECL_UID, but about their order), then
> the deletable cache is a serious problem, because with -g and with -g0 there
> is likely different amount of memory used, which means ggc_collect at
> different times and thus we could be using the cache successfully with -g
> and not without -g or vice versa.
I'm having trouble imagining a scenario where the order of two decls changes
due to the tables getting deleted. Clearing of the tables would cause copy_fn
to get called a few more times in the subsequent constexpr call evaluations,
causing later DECL_UIDs to be bigger but still in the same order I think.
And I don't think the remapped decls of a copied constexpr function body could
ever be visible to the callee so their particular DECL_UIDs shouldn't matter...
>From gcc-bugs-return-521570-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 12:36:17 2016
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Subject: [Bug tree-optimization/70577] [6 regression] tree-ssa/prefetch-5.c scan-tree-dump-times aprefetch failures
Date: Fri, 08 Apr 2016 12:36:00 -0000
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Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ro at gcc dot gnu.org
Target Milestone|--- |6.0
Summary|tree-ssa/prefetch-5.c |[6 regression]
|scan-tree-dump-times |tree-ssa/prefetch-5.c
|aprefetch failures |scan-tree-dump-times
| |aprefetch failures
--- Comment #4 from Rainer Orth <ro at gcc dot gnu.org> ---
This is a regression from the gcc-5 branch.
>From gcc-bugs-return-521571-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 12:37:12 2016
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Subject: [Bug preprocessor/69650] [6 Regression] ICE in linemap_line_start, at libcpp/line-map.c:803
Date: Fri, 08 Apr 2016 12:37:00 -0000
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--- Comment #48 from Bernd Schmidt <bernds at gcc dot gnu.org> ---
Try running cc1plus with valgrind to see whether that detects anything
untoward.
>From gcc-bugs-return-521572-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 12:37:12 2016
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Subject: [Bug c/70436] [4.9/5/6 Regression] -Wparentheses missing ambiguous else warning
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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 #15 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
It's now up to me to handle the C FE side.
>From gcc-bugs-return-521573-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 12:47:57 2016
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Subject: [Bug tree-optimization/70577] [6 regression] tree-ssa/prefetch-5.c scan-tree-dump-times aprefetch failures
Date: Fri, 08 Apr 2016 12:47:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |marxin at gcc dot gnu.org
--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
Hi.
It shows that after Honza's change, 'estimated_stmt_executions_int' return -1
for all 3 situations.
Thus 'Issued prefetch' is not printed to the dump file.
However, before Honza's patch was applied, estimated_stmt_executions_int
returns strange results for following 2 loops:
struct tail0
{
int xxx;
int yyy[2];
};
int loop0 (int n, struct tail0 *x)
{
int i, s = 0;
for (i = 0; i < n; i++)
s += x->yyy[i];
return s;
}
returns 3, however:
struct tail1
{
int xxx;
int yyy[1];
};
int loop1 (int n, struct tail1 *x)
{
int i, s = 0;
for (i = 0; i < n; i++)
s += x->yyy[i];
return s;
}
returns -1. Well, I would expect here to we given value 2. According to tree
dump file, both loops have exactly the same CFG.
Martin
>From gcc-bugs-return-521574-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 13:39:55 2016
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From: "tschwinge at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/70598] New: Fortran OpenACC host_data construct ICE
Date: Fri, 08 Apr 2016 13:39:00 -0000
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Bug ID: 70598
Summary: Fortran OpenACC host_data construct ICE
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Keywords: openacc
Severity: major
Priority: P3
Component: fortran
Assignee: cltang at gcc dot gnu.org
Reporter: tschwinge at gcc dot gnu.org
CC: jakub at gcc dot gnu.org
Target Milestone: ---
As once reported in
<http://news.gmane.org/find-root.php?message_id=%3C87r3j4lcrd.fsf%40kepler.schwinge.homeip.net%3E>
and thereabouts, there is no execution (libgomp) testing of the Fortran OpenACC
host_data construct, and the one test case present on gomp-4_0-branch,
libgomp.oacc-fortran/host_data-1.f90, runs into an ICE (for trunk as well as
gomp-4_0-branch). Please have a look at that, and also increase test coverage
(for example, by translating C/C++ execution (libgomp) test cases, if
applicable).
As the implementation of OpenACC host_data/use_device has been completely
re-done during patch review (to match OpenMP's use_device_ptr clause), I
suppose it's possible that there is some middle end infrastructure missing to
deal with constructs generated by the Fortran front end. Maybe Jakub can
advise on that, in case he's already started implementing the Fortran support
for OpenMP (which is currently missing). Or maybe the ICE is due to something
completely different. ;-)
>From gcc-bugs-return-521575-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 13:40:52 2016
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70598
Thomas Schwinge <tschwinge at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2016-04-08
Target Milestone|--- |7.0
Ever confirmed|0 |1
>From gcc-bugs-return-521576-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 14:01:05 2016
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From: "graemehattan7 at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70599] New: Crash when adding debug symbols to a program making heavy use of nested templates.
Date: Fri, 08 Apr 2016 14:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70599
Bug ID: 70599
Summary: Crash when adding debug symbols to a program making
heavy use of nested templates.
Product: gcc
Version: 5.3.0
Status: UNCONFIRMED
Severity: major
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: graemehattan7 at hotmail dot com
Target Milestone: ---
This issue was found while trying to compile the source code for the aprinter
3D printer firmware - https://github.com/ambrop72/aprinter
Normal compilation works fine, the issue is when I try to add the -g option for
a debug build. When I do this, the compilation resources increase until 100%
cpu and memory are used. Eventually I get the following message:
arm-none-eabi-gcc: internal compiler error: Killed (program cc1plus)
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
The aprinter software makes heavy use of nested templates, I imagine that this
is what trigger the issue. I have attached the pre-processor output from the
file that fails. Unfortunately this is quite large due to the number of headers
defining template classes.
The issue can be reproduced with the following command -
arm-none-eabi-gcc -g -x c++ -c -mcpu=cortex-m3 -mthumb -Wall -Wextra
-Wfatal-errors -Wno-unused -Wno-sign-compare -std=c++11 -fno-access-control
aprinter-nixbuild.ii
Note that there will be a lot of compiler warnings produced (~750 MB!) if the
-Wno-unused flag is removed. This is in part because of the very long type
names produced by template nesting.
Additional info:
arm-none-eabi-gcc -v
Using built-in specs.
COLLECT_GCC=/nix/store/hq0izgjckpfiw9mmbh4lz2skfx70bzlw-gcc-arm-embedded-fromsrc-5.3.0/bin/arm-none-eabi-gcc
COLLECT_LTO_WRAPPER=/nix/store/hq0izgjckpfiw9mmbh4lz2skfx70bzlw-gcc-arm-embedded-fromsrc-5.3.0/libexec/gcc/arm-none-eabi/5.3.0/lto-wrapper
Target: arm-none-eabi
Configured with: ../gcc-5.3.0/configure --target=arm-none-eabi
--prefix=/nix/store/hq0izgjckpfiw9mmbh4lz2skfx70bzlw-gcc-arm-embedded-fromsrc-5.3.0
--with-sysroot=/nix/store/hq0izgjckpfiw9mmbh4lz2skfx70bzlw-gcc-arm-embedded-fromsrc-5.3.0/arm-none-eabi
--enable-interwork --disable-nls
--with-build-time-tools=/nix/store/hq0izgjckpfiw9mmbh4lz2skfx70bzlw-gcc-arm-embedded-fromsrc-5.3.0/arm-none-eabi/bin
--enable-poison-system-directories --enable-lto --enable-gold
--disable-decimal-float --disable-libffi --disable-libgomp
--disable-libquadmath --disable-libssp --disable-libstdcxx-pch
--disable-threads --disable-shared --disable-tls --with-newlib
--disable-libunwind-exceptions --enable-checking=release
--enable-languages=c,c++
Thread model: single
gcc version 5.3.0 (GCC)
The compiler was built via the nix-build derivation included in aprinter -
https://github.com/ambrop72/aprinter/blob/master/nix/gcc-arm-embedded-fromsrc.nix
This includes some (small) custom patches which are included in the aprinter
code. As far as I can see they are unrelated to the issue.
I have also tried to use the arm-none-eabi compiler in the Ubunutu 15.10
repositories (4.9.3) and have the same issue -
arm-none-eabi-gcc -v
Using built-in specs.
COLLECT_GCC=arm-none-eabi-gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/arm-none-eabi/4.9.3/lto-wrapper
Target: arm-none-eabi
Configured with: ../src/configure --build=x86_64-linux-gnu --prefix=/usr
--includedir='/usr/lib/include' --mandir='/usr/lib/share/man'
--infodir='/usr/lib/share/info' --sysconfdir=/etc --localstatedir=/var
--disable-silent-rules --libdir='/usr/lib/lib/x86_64-linux-gnu'
--libexecdir='/usr/lib/lib/x86_64-linux-gnu' --disable-maintainer-mode
--disable-dependency-tracking --mandir=/usr/share/man
--enable-languages=c,c++,lto --enable-multilib --disable-decimal-float
--disable-libffi --disable-libgomp --disable-libmudflap --disable-libquadmath
--disable-libssp --disable-libstdcxx-pch --disable-nls --disable-shared
--disable-threads --disable-tls --build=x86_64-linux-gnu --target=arm-none-eabi
--with-system-zlib --with-gnu-as --with-gnu-ld
--with-pkgversion=15:4.9.3+svn227297-1 --without-included-gettext
--prefix=/usr/lib --infodir=/usr/share/doc/gcc-arm-none-eabi/info
--htmldir=/usr/share/doc/gcc-arm-none-eabi/html
--pdfdir=/usr/share/doc/gcc-arm-none-eabi/pdf --bindir=/usr/bin
--libexecdir=/usr/lib --libdir=/usr/lib --disable-libstdc++-v3
--host=x86_64-linux-gnu --with-headers=no --without-newlib
--with-multilib-list=armv6-m,armv7-m,armv7e-m,armv7-r CFLAGS='-g -O2
-fstack-protector-strong' CPPFLAGS=-D_FORTIFY_SOURCE=2 CXXFLAGS='-g -O2
-fstack-protector-strong' FCFLAGS='-g -O2 -fstack-protector-strong' FFLAGS='-g
-O2 -fstack-protector-strong' GCJFLAGS='-g -O2 -fstack-protector-strong'
LDFLAGS='-Wl,-Bsymbolic-functions -Wl,-z,relro' OBJCFLAGS='-g -O2
-fstack-protector-strong' OBJCXXFLAGS='-g -O2 -fstack-protector-strong'
INHIBIT_LIBC_CFLAGS=-DUSE_TM_CLONE_REGISTRY=0 AR_FOR_TARGET=arm-none-eabi-ar
AS_FOR_TARGET=arm-none-eabi-as LD_FOR_TARGET=arm-none-eabi-ld
NM_FOR_TARGET=arm-none-eabi-nm OBJDUMP_FOR_TARGET=arm-none-eabi-objdump
RANLIB_FOR_TARGET=arm-none-eabi-ranlib READELF_FOR_TARGET=arm-none-eabi-readelf
STRIP_FOR_TARGET=arm-none-eabi-strip
Thread model: single
gcc version 4.9.3 20150529 (prerelease) (15:4.9.3+svn227297-1)
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From: "graemehattan7 at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70599] Crash when adding debug symbols to a program making heavy use of nested templates.
Date: Fri, 08 Apr 2016 14:11:00 -0000
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--- Comment #1 from Graeme <graemehattan7 at hotmail dot com> ---
Created attachment 38223
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38223&action=edit
Pre-processed source file, gzipped to get around size limit.
>From gcc-bugs-return-521578-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 14:12:31 2016
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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++/70588] [5/6 regression] SIGBUS on a VLA larger than SIZE_MAX / 2
Date: Fri, 08 Apr 2016 14:12:00 -0000
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--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Jakub, feel free to remove the regression marker if you don't think it's
appropriate.
>From gcc-bugs-return-521579-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 14:21:17 2016
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From: "bernds at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/70600] New: Missed tree optimization with multiple additions in different types.
Date: Fri, 08 Apr 2016 14:21:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70600
Bug ID: 70600
Summary: Missed tree optimization with multiple additions in
different types.
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: bernds at gcc dot gnu.org
Target Milestone: ---
Target: x86_64-pc-linux-gnu
The following is a testcase reduced from a Linux kernel file. Compile with -O2
on x86_64-linux.
There are two additions, the first in type unsigned long, the second one after
casting the first result to unsigned int. Together, they end up as a no-op, but
this is not caught during tree optimization. The combiner finally manages to
eliminate them, with the help of a note added by fwprop.
(I was looking at whether we could eliminate the creation of REG_EQUAL notes
from fwprop, and found only three cases out of a set of 4492 source files where
they changed code generation; this was one of them.)
int p (long mem_map, long page, unsigned int *p, unsigned int *frag)
{
unsigned int _83 = *p;
long _142 = page - mem_map;
long _143 = _142 / 56;
unsigned long _144 = _143;
unsigned long _145 = _144 << 12;
unsigned long _146 = _145 + 0xc0000000;
unsigned int _147 = _146;
unsigned int _190 = _83 + 0x40000000;
unsigned int _149 = _147 + _190;
return _149;
}
>From gcc-bugs-return-521580-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 14:32:32 2016
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Subject: [Bug fortran/70592] Addressing error in dynamically-allocated character array
Date: Fri, 08 Apr 2016 14:32:00 -0000
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |kargl at gcc dot gnu.org
Known to work| |5.3.1, 6.0
--- Comment #1 from kargl at gcc dot gnu.org ---
On i686-*-freebsd, I get
laptop-kargl:kargl[220] ./z
6 1 6
1 679608344 2 679608345
3 679608346 4 679608347
5 679608348 6 679608349
123456
On x86_64-*-freebsd, I get
troutmask:sgk[203] gfc6 -o z a.f90
troutmask:sgk[204] ./z
6 1 6
1 8615239704 2 8615239705
3 8615239706 4 8615239707
5 8615239708 6 8615239709
123456
troutmask:sgk[205] gfc5 -o z a.f90
troutmask:sgk[206] ./z
6 1 6
1 8615239704 2 8615239705
3 8615239706 4 8615239707
5 8615239708 6 8615239709
123456
So, the appears to be fixed on both trunk and the 5-branch.
>From gcc-bugs-return-521581-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 14:38:09 2016
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Subject: [Bug tree-optimization/70586] [4.9/5/6 Regression] wrong code at -O2 and -O3 on x86_64-linux-gnu in 32-bit and 64-bit modes
Date: Fri, 08 Apr 2016 14:38:00 -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 #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 38224
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38224&action=edit
gcc6-pr70586.patch
Untested fix. In my understanding, even const functions can contain floating
point math (that could raise floating point exceptions) or integer
division/modulo without constant divisor, at least our pure/const discovery
doesn't care about those, and I bet the vast majority of floating point const
functions could in some cases raise exceptions etc.
Thus IMHO for ifcombine no side effects discovery even const calls are
problematic, we shouldn't move calls to them before conditions that originally
guarded them, as in this example where the (after fnsplit) condition in the
caller checks that the second argument is not 0 and only calls the const
function if the second argument is non-zero, but ifcombine arranges for the
condition to be tested only after the call instead of before it.
>From gcc-bugs-return-521582-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 14:41:05 2016
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Subject: [Bug c++/70590] [6 Regression] r234810 causes error: location references block not in block tree
Date: Fri, 08 Apr 2016 14:41:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70590
--- Comment #7 from Patrick Palka <ppalka at gcc dot gnu.org> ---
Reduced :
// PR c++/70590
// { dg-options "-O2" }
int a;
constexpr int *
foo ()
{
return &a;
}
void blah (int *);
int
bar ()
{
blah (foo ());
}
int
baz ()
{
blah (foo ());
}
>From gcc-bugs-return-521583-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 14:42:01 2016
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Subject: [Bug c++/70594] [6 Regression] -fcompare-debug failure
Date: Fri, 08 Apr 2016 14:42:00 -0000
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--- Comment #4 from Tobias Burnus <burnus at gcc dot gnu.org> ---
Created attachment 38225
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38225&action=edit
test.ii test case (g++ -O1 -fcompare-debug)
(In reply to Jakub Jelinek from comment #1)
> Without the testcase it is hard to guess.
I now tried to compile LLVM with -fcompare-debug - and I guessed correctly, one
of the files also fails there (lib/Support/CommandLine.cpp).
I am not sure whether it is the same issue, but it is a debug miscompare.
Contrary to my original file, it also fails when a .ii is generated with "-E";
additionally, it also fails already with -O1 and it reduced more readily (for
my original example, it seemed to depend much more on the memory layout such
that comment lines were kept).
The somewhat reduced example is attached; it fails here (and hopefully
elsewhere) using "g++ -O1 -fcompare-debug" with: "g++: error: test.ii:
-fcompare-debug failure".
>From gcc-bugs-return-521584-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 14:49:26 2016
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Subject: [Bug c++/70590] [6 Regression] r234810 causes error: location references block not in block tree
Date: Fri, 08 Apr 2016 14:49:00 -0000
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--- Comment #8 from Patrick Palka <ppalka at gcc dot gnu.org> ---
(In reply to Markus Trippelsdorf from comment #6)
> (In reply to Patrick Palka from comment #5)
> > (In reply to Markus Trippelsdorf from comment #4)
> > > (In reply to Patrick Palka from comment #3)
> > > > (In reply to Jakub Jelinek from comment #2)
> > > > > location references block not in block tree generally means insufficient
> > > > > unsharing, where some function that got through gimple-low.c where
> > > > > TREE_SET_BLOCK has been used on some of the trees is sharing trees with a
> > > > > different function.
> > > >
> > > > That makes sense. So in cxx_eval_call_expression we should unconditionally
> > > > unshare the result of the call because the two caches (fundef_copies_table
> > > > and constexpr_call_table) may cause us to share the same trees in different
> > > > functions. Alternatively we can just call unshare_expr once in the
> > > > top-level cxx_eval_outermost_constant_expression, I think. Markus, does
> > > > this patch fix the build for you?
> > >
> > > No. It now ICEs: in maybe_constant_value_1, at cp/constexpr.c:4328
> >
> > What about just this instead?
>
> This one fixes the issue. Firefox now builds fine. Thanks.
Markus, when you have time, can you please test this patch?
diff --git a/gcc/cp/constexpr.c b/gcc/cp/constexpr.c
index 649d336..6acd5fc 100644
--- a/gcc/cp/constexpr.c
+++ b/gcc/cp/constexpr.c
@@ -4144,6 +4144,9 @@ cxx_eval_outermost_constant_expr (tree t, bool
allow_non_constant,
r = cxx_eval_constant_expression (&ctx, r,
false, &non_constant_p, &overflow_p);
+ if (r != t
+ && TREE_CODE (r) != CONSTRUCTOR)
+ r = unshare_expr (r);
verify_constant (r, allow_non_constant, &non_constant_p, &overflow_p);
It is one that I'm more comfortable with.(In reply to Markus Trippelsdorf from
comment #6)
> (In reply to Patrick Palka from comment #5)
> > (In reply to Markus Trippelsdorf from comment #4)
> > > (In reply to Patrick Palka from comment #3)
> > > > (In reply to Jakub Jelinek from comment #2)
> > > > > location references block not in block tree generally means insufficient
> > > > > unsharing, where some function that got through gimple-low.c where
> > > > > TREE_SET_BLOCK has been used on some of the trees is sharing trees with a
> > > > > different function.
> > > >
> > > > That makes sense. So in cxx_eval_call_expression we should unconditionally
> > > > unshare the result of the call because the two caches (fundef_copies_table
> > > > and constexpr_call_table) may cause us to share the same trees in different
> > > > functions. Alternatively we can just call unshare_expr once in the
> > > > top-level cxx_eval_outermost_constant_expression, I think. Markus, does
> > > > this patch fix the build for you?
> > >
> > > No. It now ICEs: in maybe_constant_value_1, at cp/constexpr.c:4328
> >
> > What about just this instead?
>
> This one fixes the issue. Firefox now builds fine. Thanks.
When you have time, could you please test this patch?
diff --git a/gcc/cp/constexpr.c b/gcc/cp/constexpr.c
index 7f4bb04..b66cbad 100644
--- a/gcc/cp/constexpr.c
+++ b/gcc/cp/constexpr.c
@@ -4143,6 +4143,12 @@ cxx_eval_outermost_constant_expr (tree t, bool
allow_non_constant,
verify_constant (r, allow_non_constant, &non_constant_p, &overflow_p);
+ /* Unshare the result unless it's a CONSTRUCTOR in which case it's already
+ unshared. */
+ if (r != t
+ && TREE_CODE (r) != CONSTRUCTOR)
+ r = unshare_expr (r);
+
/* Mutable logic is a bit tricky: we want to allow initialization of
constexpr variables with mutable members, but we can't copy those
members to another constexpr variable. */
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Subject: [Bug c++/70590] [6 Regression] r234810 causes error: location references block not in block tree
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Patrick Palka <ppalka at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |ppalka at gcc dot gnu.org
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Subject: [Bug c++/70590] [6 Regression] r234810 causes error: location references block not in block tree
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--- Comment #9 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Which hunk do you want me to test?
>From gcc-bugs-return-521587-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 15:10:47 2016
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Subject: [Bug c++/70590] [6 Regression] r234810 causes error: location references block not in block tree
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--- Comment #10 from Patrick Palka <ppalka at gcc dot gnu.org> ---
(In reply to Markus Trippelsdorf from comment #9)
> Which hunk do you want me to test?
The last one, sorry about the garbled message.
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Subject: [Bug c++/70594] [6 Regression] -fcompare-debug failure
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--- Comment #5 from Patrick Palka <ppalka at gcc dot gnu.org> ---
(In reply to Tobias Burnus from comment #4)
> Created attachment 38225 [details]
> test.ii test case (g++ -O1 -fcompare-debug)
>
> (In reply to Jakub Jelinek from comment #1)
> > Without the testcase it is hard to guess.
>
> I now tried to compile LLVM with -fcompare-debug - and I guessed correctly,
> one of the files also fails there (lib/Support/CommandLine.cpp).
>
> I am not sure whether it is the same issue, but it is a debug miscompare.
> Contrary to my original file, it also fails when a .ii is generated with
> "-E"; additionally, it also fails already with -O1 and it reduced more
> readily (for my original example, it seemed to depend much more on the
> memory layout such that comment lines were kept).
>
> The somewhat reduced example is attached; it fails here (and hopefully
> elsewhere) using "g++ -O1 -fcompare-debug" with: "g++: error: test.ii:
> -fcompare-debug failure".
Same here. Some observations:
Reverting the portion of the patch that added the "deletable" GTY tag to
constexpr_call_table fixes the failure.
Making get_fundef_copy() to always allocate a new function (thus making it as
if the fundef_copies_table didn't exist) doesn't fix the failure.
So it seems that adding the "deletable" GTY tag to constexpr_call_table is
responsible for this regression, and not the new fundef_copies_table. Still
have no idea why or how though.
>From gcc-bugs-return-521589-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 15:19:59 2016
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Subject: [Bug c++/70588] [5/6 regression] SIGBUS on a VLA larger than SIZE_MAX / 2
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Blocks| |16994
--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
I should add that the test case in comment #0 isn't the best. It just squeaks
by in 4.9.3 because of the optimization. Without optimization, it crashes too.
This is because the code that implements the bounds overflow detection has a
bug that prevents it from reliably detecting the SIZE_MAX / 2 + 1 case. It
works correctly for larger values (SIZE_MAX / 2 + 2 to SIZE_MAX) but only for
one-dimensional VLAs, and fails for things like char a[2][N] for very large N.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=16994
[Bug 16994] [meta-bug] VLA and C++
>From gcc-bugs-return-521591-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 15:24:58 2016
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Subject: [Bug fortran/68887] [6 regression] gfortran.dg/coarray/event_[12].f90 -fcoarray=lib -O2 -lcaf_single -latomic fails
Date: Fri, 08 Apr 2016 15:24:00 -0000
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Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |afanfa at gcc dot gnu.org
--- Comment #4 from Rainer Orth <ro at gcc dot gnu.org> ---
Tobias, Alessandro,
could you shed some light what should happen here? This is a regression after
all.
Thanks.
Rainer
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Subject: [Bug c++/70590] [6 Regression] r234810 causes error: location references block not in block tree
Date: Fri, 08 Apr 2016 15:24:00 -0000
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--- Comment #11 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
(In reply to Patrick Palka from comment #10)
> (In reply to Markus Trippelsdorf from comment #9)
> > Which hunk do you want me to test?
>
> The last one, sorry about the garbled message.
Firefox compiles fine with this one, too.
>From gcc-bugs-return-521592-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 15:34:48 2016
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Subject: [Bug debug/70599] Crash when adding debug symbols to a program making heavy use of nested templates.
Date: Fri, 08 Apr 2016 15:34:00 -0000
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ktkachov at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |compile-time-hog,
| |memory-hog
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-08
CC| |ktkachov at gcc dot gnu.org
Component|c++ |debug
Ever confirmed|0 |1
--- Comment #2 from ktkachov at gcc dot gnu.org ---
Confirmed that adding -g does indeed use up much more memory and gets killed by
my machine too, whereas without -g it succeeds, producing an assembly file with
313851 lines.
Generating debug info is known to increase memory usage, but I don't know if
such an increase is expected for a file of type.
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Subject: [Bug c++/70590] [6 Regression] r234810 causes error: location references block not in block tree
Date: Fri, 08 Apr 2016 15:39:00 -0000
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--- Comment #12 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Patrick Palka from comment #8)
> --- a/gcc/cp/constexpr.c
> +++ b/gcc/cp/constexpr.c
> @@ -4143,6 +4143,12 @@ cxx_eval_outermost_constant_expr (tree t, bool
> allow_non_constant,
>
> verify_constant (r, allow_non_constant, &non_constant_p, &overflow_p);
>
> + /* Unshare the result unless it's a CONSTRUCTOR in which case it's already
> + unshared. */
> + if (r != t
> + && TREE_CODE (r) != CONSTRUCTOR)
> + r = unshare_expr (r);
> +
> /* Mutable logic is a bit tricky: we want to allow initialization of
> constexpr variables with mutable members, but we can't copy those
> members to another constexpr variable. */
Wouldn't it be better to move it even further down, so that we don't unshare
even when actually not returning r or something based on it?
E.g. (completely untested)?
--- gcc/cp/constexpr.c.jj 2016-04-07 23:27:44.000000000 +0200
+++ gcc/cp/constexpr.c 2016-04-08 17:36:49.774326934 +0200
@@ -4168,6 +4168,11 @@ cxx_eval_outermost_constant_expr (tree t
return error_mark_node;
else if (non_constant_p && TREE_CONSTANT (r))
{
+ /* Unshare the result unless it's a CONSTRUCTOR in which case it's
+ already unshared. */
+ if (r != t && TREE_CODE (r) != CONSTRUCTOR)
+ r = unshare_expr (r);
+
/* This isn't actually constant, so unset TREE_CONSTANT. */
if (EXPR_P (r))
r = copy_node (r);
@@ -4179,6 +4184,10 @@ cxx_eval_outermost_constant_expr (tree t
}
else if (non_constant_p || r == t)
return t;
+ /* Unshare the result unless it's a CONSTRUCTOR in which case it's
+ already unshared. */
+ else if (r != t && TREE_CODE (r) != CONSTRUCTOR)
+ r = unshare_expr (r);
if (TREE_CODE (r) == CONSTRUCTOR && CLASS_TYPE_P (TREE_TYPE (r)))
{
>From gcc-bugs-return-521594-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 15:41:46 2016
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From: "stefan.teleman at oracle dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/68945] enable libcilkrts on SPARC
Date: Fri, 08 Apr 2016 15:41:00 -0000
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--- Comment #7 from Stefan Teleman <stefan.teleman at oracle dot com> ---
> Since Stefan hasn't followed up and I'm currently looking at other
> libcilkrts issues anyway, I'm taking over from here.
Had every intention to follow-up with a cleaned-up patch, but did not find
the time to re-do the patch.
I will look into the SIGBUS crashes on SPARC64 and see what i come up
with.
>From gcc-bugs-return-521595-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 15:47:34 2016
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From: "zmi007 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/70601] New: [OOP] ICE on procedure pointer component call
Date: Fri, 08 Apr 2016 15:47:00 -0000
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Bug ID: 70601
Summary: [OOP] ICE on procedure pointer component call
Product: gcc
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I am playing around with procedure pointer components and get ICE
module_gfortran_bug.f90:62:0:
call concrete % run()
internal compiler error: in fold_convert_loc, at fold-const.c:2256
on the following code with gfortran-6 [trunk revision 234449]. Note that I am
not sure if the code is valid, but ifort 16 is able to compile it.
! code
module abstract_type_module
implicit none
private
public :: abstract_type
type, abstract :: abstract_type
procedure (abstract_type_procedure1), pointer :: run => NULL()
end type abstract_type
abstract interface
subroutine abstract_type_procedure1(this)
import :: abstract_type
class(abstract_type), intent(inout) :: this
end subroutine abstract_type_procedure1
end interface
end module abstract_type_module
module concrete_type_module
use abstract_type_module
implicit none
private
public :: concrete_type
type, extends(abstract_type) :: concrete_type
contains
procedure , pass :: init => init_concrete_type
end type concrete_type
contains
subroutine run_concrete_type(this)
implicit none
class(abstract_type), intent(inout) :: this
select type (this)
type is (concrete_type)
write(*,*) "run_concrete_type"
class default
write(*,*) "?"
end select
end subroutine run_concrete_type
subroutine init_concrete_type(this)
implicit none
class(concrete_type), intent(inout) :: this
this % run => run_concrete_type
write(*,*) "init_concrete_type"
end subroutine init_concrete_type
end module concrete_type_module
program test
use concrete_type_module
implicit none
type(concrete_type) :: concrete
call concrete % init()
call concrete % run()
end program test
>From gcc-bugs-return-521596-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 15:50:57 2016
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Subject: [Bug c++/70588] SIGBUS on a VLA larger than SIZE_MAX / 2
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[5/6 regression] SIGBUS on |SIGBUS on a VLA larger than
|a VLA larger than SIZE_MAX |SIZE_MAX / 2
|/ 2 |
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Also, I kind of don't understand why is it so important to diagnose SIZE_MAX /
2 VLAs, when already significantly smaller VLAs will not really work on most
systems (say with most Linux defaults usually something over 10MB or so
already).
As the VLAs in C++ are just an extension, IMHO it is better to keep it closer
to the C VLAs (not throw etc.).
>From gcc-bugs-return-521597-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 15:53:14 2016
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Subject: [Bug tree-optimization/70600] Missed tree optimization with multiple additions in different types.
Date: Fri, 08 Apr 2016 15:53:00 -0000
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Marc Glisse <glisse at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
We could match a pattern (a±c1)±(b±c2) with intermediate conversions, or try to
generalize reassoc, but in this particular case, it mostly looks like yet
another example for the missing narrowing pass. _146 has a single use, which is
a narrowing conversion to a "good" type (not something like a 16 bit 'short' on
a platform where all arithmetic insns are for 32 bits), so I can't see any
reason not to perform the addition (with a constant) in the narrower mode, and
transitively the shift as well.
>From gcc-bugs-return-521598-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 16:10:16 2016
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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/70601] [OOP] ICE on procedure pointer component call
Date: Fri, 08 Apr 2016 16:10:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
WORKSFORME (x86_64-apple-darwin15) from 4.8 up to trunk (6.0).
>From gcc-bugs-return-521599-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 16:15:54 2016
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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++/70588] SIGBUS on a VLA larger than SIZE_MAX / 2
Date: Fri, 08 Apr 2016 16:15:00 -0000
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--- Comment #6 from Martin Sebor <msebor at gcc dot gnu.org> ---
I agree that the SIZE_MAX/2 limit isn't very useful. A lower limit would be
more useful (I proposed one on the order of tens of kilobytes to megabytes in
my patch for bug 69517). Jason and I have been discussing making the limit
customizable somehow (see
https://gcc.gnu.org/ml/gcc-patches/2016-04/msg00368.html for some ideas --
suggestions for better solutions are welcome).
Other than that, while I also agree with the goal of keeping C++ VLAs close to
C, since overflowing the stack is the most serious shortcoming of the latter,
detecting and preventing that condition (as well as detecting excess
initializers in the G++ extension) by throwing an exception is an important
improvement that makes the feature safer to use. It is in line with how
overflowing array bounds in the array new expression is handled.
(As an aside, since C doesn't have exceptions, trapping or aborting in case of
bound overflow might be worth considering as a stopgap solution.)
>From gcc-bugs-return-521600-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 16:16:51 2016
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From: "rogero at howzatt dot demon.co.uk" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug preprocessor/69650] [6 Regression] ICE in linemap_line_start, at libcpp/line-map.c:803
Date: Fri, 08 Apr 2016 16:16:00 -0000
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--- Comment #49 from Roger Orr <rogero at howzatt dot demon.co.uk> ---
Alas, valgrind finds nothing untoward.
make MAKEINFO=true STAGE1_CXXFLAGS="-g -O0" clean-stage1
make MAKEINFO=true STAGE1_CXXFLAGS="-g -O0" all-stage1
valgrind /var/tmp/gcc-trunk-234481/build/gcc/cc1plus -fpreprocessed direct.ii
-quiet -dumpbase direct.ii -mtune=generic -march=x86-64 -auxbase direct -O3
-Werror -std=c++14 -fmax-errors=1 -o /tmp/ccGReQOF.s
I've also tried a build with -fsanitize=address,undefined but this too reports
no problems.
Running under gdb and breaking at libcpp/directives.c:1057 I can see the
following:
(gdb) p MAIN_FILE_P(map)
$17 = true
# This is the reason why it is trying to print the message
if (reason == LC_LEAVE)
{
const line_map_ordinary *from;
if (MAIN_FILE_P (map)
|| (/*...*/))
{
cpp_warning ( // ...
(gdb) p map
$18 = (const line_map_ordinary *) 0x7fffec6ddfe0
(gdb) p *map
$19 = {<line_map> = {start_location = 2779096485, reason = 165}, to_file =
0xa5a5a5a5a5a5a5a5 <error: Cannot access memory at address 0xa5a5a5a5a5a5a5a5>,
to_line = 2779096485,
included_from = -1515870811, sysp = 165 'â–’', m_column_and_range_bits = 165,
m_range_bits = 165}
# These values look concerning ... what do they mean and where do they come
from?!
'map' comes from line 979:
const line_map_ordinary *map = LINEMAPS_LAST_ORDINARY_MAP (line_table);
(gdb) p line_table
$20 = (line_maps *) 0x7fffecf8b000
(gdb) p *line_table
$21 = {info_ordinary = {maps = 0x7fffec9f4000, allocated = 16384, used = 4097,
cache = 4096}, info_macro = {maps = 0x0, allocated = 0, used = 0, cache = 0},
depth = 3,
trace_includes = false, highest_location = 485446816, highest_line =
485446816, max_column_hint = 256, reallocator = 0x25409c0
<realloc_for_line_map(void*, size_t)>,
round_alloc_size = 0x11bf0fa <ggc_round_alloc_size(unsigned long)>,
location_adhoc_data_map = {htab = 0x60b00000ad80, curr_loc = 4140, allocated =
8192, data = 0x7fffeb80c000},
builtin_location = 1, seen_line_directive = true, default_range_bits = 5,
num_optimized_ranges = 486644, num_unoptimized_ranges = 4140}
This code is unknown to me, so I am not sure where to look next ...
>From gcc-bugs-return-521601-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 16:26:06 2016
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Subject: [Bug fortran/70601] [OOP] ICE on procedure pointer component call
Date: Fri, 08 Apr 2016 16:26:00 -0000
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--- Comment #2 from zmi <zmi007 at gmail dot com> ---
and this one?
program test
use concrete_type_module
implicit none
type(concrete_type), allocatable :: concrete
allocate(concrete)
call concrete % init()
call concrete % run()
end program test
>From gcc-bugs-return-521602-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 16:27:13 2016
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/39159] unhelpful attribute warning on matching declaration after definition
Date: Fri, 08 Apr 2016 16:27:00 -0000
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--- Comment #7 from Martin Sebor <msebor at gcc dot gnu.org> ---
I'm not an expert in this area but the approach seems reasonable to me. I
didn't test it in 5.x but with 6.0, it doesn't make a difference because
simple_cst_equal() cannot compare TREE_LISTs. Using attribute_value_equal()
instead does work.
>From a user's point of view, though, it would be helpful if the diagnostic
included the names of the "new" attributes that are being ignored, and pointed
to the location of the previous "old" declaration that the current one
conflicts with. The former should be a matter of concatenating the names of
the new attributes into a string and making that part of the warning. The
latter can be done by calling:
inform (DECL_SOURCE_LOCATION (TYPE_FIELDS (*anode)), "previous declaration
here");
To get the patch reviewed and ultimately approved, you should rebase it to the
current trunk, add tests and ChangeLog entries, and post it to gcc-patches.
>From gcc-bugs-return-521603-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 16:34:48 2016
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Subject: [Bug fortran/70601] [OOP] ICE on procedure pointer component call
Date: Fri, 08 Apr 2016 16:34:00 -0000
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--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> and this one?
> ...
It gives
call concrete % run()
internal compiler error: in fold_convert_loc, at fold-const.c:2256
>From gcc-bugs-return-521604-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 16:35:11 2016
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From: "bernds at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug preprocessor/69650] [6 Regression] ICE in linemap_line_start, at libcpp/line-map.c:803
Date: Fri, 08 Apr 2016 16:35:00 -0000
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--- Comment #50 from Bernd Schmidt <bernds at gcc dot gnu.org> ---
The 0xa5 bytes probably come from ggc-page, which tries to poison freed memory.
This does suggest that there's a use-after-free issue here.
At the step after "p map", try "watch -l map->to_file" followed by "run", which
should get you to the point where the memory is overwritten.
>From gcc-bugs-return-521605-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 16:50:03 2016
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Subject: [Bug preprocessor/69650] [6 Regression] ICE in linemap_line_start, at libcpp/line-map.c:803
Date: Fri, 08 Apr 2016 16:50:00 -0000
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--- Comment #51 from Roger Orr <rogero at howzatt dot demon.co.uk> ---
Thanks, I hope to try that on Monday.
The function gets called multiple times, so I need to identify the last time.
The memory must have changed *during* the call to do_linemarker as the new_file
variable is set from map on line 981:
const char *new_file = ORDINARY_MAP_FILE_NAME (map);
but the same call executed now fails:
(gdb) p ORDINARY_MAP_FILE_NAME (map)
$3 = 0xa5a5a5a5a5a5a5a5 <error: Cannot access memory at address
0xa5a5a5a5a5a5a5a5>
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Subject: [Bug bootstrap/70519] genmatch fails to compile under gcc-5.2.0 - missing '-lstdc++' .
Date: Fri, 08 Apr 2016 16:51:00 -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 #11 from Jim Wilson <wilson at gcc dot gnu.org> ---
The -lstdc++ is added by lang_specific_driver in g++spec.c. g++spec.o is
linked into xg++. In the function lang_specific_driver, library is set to 1 if
the input file is not a header file, and then near the bottom a generate_option
call adds the -lstdc++ to the command line options. You should debug
lang_specific_driver to see why it isn't working.
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From: "rogero at howzatt dot demon.co.uk" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug preprocessor/69650] [6 Regression] ICE in linemap_line_start, at libcpp/line-map.c:803
Date: Fri, 08 Apr 2016 16:55:00 -0000
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--- Comment #52 from Roger Orr <rogero at howzatt dot demon.co.uk> ---
Ah - added print of *pfile->line_table at line 978 and compared with the value
when we error.
978 struct line_maps *line_table = pfile->line_table;
$3702 = {info_ordinary = {maps = 0x7fffec65d000, allocated = 4096, used = 4096,
cache = 4095}, info_macro = {maps = 0x0, allocated = 0, used = 0, cache = 0},
depth = 8,
trace_includes = false, highest_location = 511461984, highest_line =
511461856, max_column_hint = 128, reallocator = 0x25409c0
<realloc_for_line_map(void*, size_t)>,
round_alloc_size = 0x11bf0fa <ggc_round_alloc_size(unsigned long)>,
location_adhoc_data_map = {htab = 0x60b00000ad80, curr_loc = 4884, allocated =
8192, data = 0x7fffeb7ab000},
builtin_location = 1, seen_line_directive = true, default_range_bits = 5,
num_optimized_ranges = 500030, num_unoptimized_ranges = 4884}
(gdb) p *pfile->line_table
$3703 = {info_ordinary = {maps = 0x7fffec993000, allocated = 16384, used =
4097, cache = 4096}, info_macro = {maps = 0x0, allocated = 0, used = 0, cache =
0}, depth = 8,
trace_includes = false, highest_location = 511470272, highest_line =
511470272, max_column_hint = 256, reallocator = 0x25409c0
<realloc_for_line_map(void*, size_t)>,
round_alloc_size = 0x11bf0fa <ggc_round_alloc_size(unsigned long)>,
location_adhoc_data_map = {htab = 0x60b00000ad80, curr_loc = 4885, allocated =
8192, data = 0x7fffeb7ab000},
builtin_location = 1, seen_line_directive = true, default_range_bits = 5,
num_optimized_ranges = 500031, num_unoptimized_ranges = 4885}
The 'mapos' address has changed and the allocated size has changed from 4096 to
16384. The 'map' variable points 0x1ffe0 bytes beyond the *old* value of maps.
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Subject: [Bug fortran/70601] [OOP] ICE on procedure pointer component call
Date: Fri, 08 Apr 2016 16:55:00 -0000
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--- Comment #4 from zmi <zmi007 at gmail dot com> ---
ok, my fault)
ice on allocatable type only
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Subject: [Bug c++/70594] [6 Regression] -fcompare-debug failure
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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> ---
(In reply to Tobias Burnus from comment #4)
> Created attachment 38225 [details]
> test.ii test case (g++ -O1 -fcompare-debug)
>
> (In reply to Jakub Jelinek from comment #1)
> > Without the testcase it is hard to guess.
>
> I now tried to compile LLVM with -fcompare-debug - and I guessed correctly,
> one of the files also fails there (lib/Support/CommandLine.cpp).
>
> I am not sure whether it is the same issue, but it is a debug miscompare.
> Contrary to my original file, it also fails when a .ii is generated with
> "-E"; additionally, it also fails already with -O1 and it reduced more
> readily (for my original example, it seemed to depend much more on the
> memory layout such that comment lines were kept).
>
> The somewhat reduced example is attached; it fails here (and hopefully
> elsewhere) using "g++ -O1 -fcompare-debug" with: "g++: error: test.ii:
> -fcompare-debug failure".
That looks like a different issue though, perhaps make_fancy_decl_name should
not add DECL_UID to the names, but just D.xxxx instead, either when
-fdump-final-insns= option is used only, or always?
E.g. if the FIELD_DECLs or VAR_DECLs etc. have no name and different DECL_UIDs,
they will then show up in -fdump-final-insns= dumps, which have means to
print xxxx instead of actual uids, but in the SSA fancy names doesn't know
there are any uids embedded in there.
That said, if the constexpr processing in case the cache has been emptied can
create new decls, then I generally don't see how the desirable same order of
uids for the same things could be ever guaranteed.
Consider constexpr handling of some function (which puts it into cache), that
creates DECL_UIDs 37, 38, 39. Then some further parsing is performed, and
DECL_UIDs 40, 41, 42 are created. Then we do constexpr handling for the same
function, if we find it in the cache, we don't generate new uids, otherwise, if
GC happens after DECL_UID 42 generation, we need to redo the constexpr handling
and create DECL_UIDs 43, 44, 45.
Now the important question is if these decls (VAR_DECLs, CONST_DECLs,
FIELD_DECLs, PARM_DECLs, RESULT_DECLs, FUNCTION_DECLs) can ever make it into
the IL or not. If they would be just temporaries during the constexpr
processing, perhaps we are fine if we fix up the tree-sra.c case, but the #c0
hints perhaps something different.
The Declarations used... list that #c0 differs on is sorted by DECL_UID.
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Subject: [Bug preprocessor/69650] [6 Regression] ICE in linemap_line_start, at libcpp/line-map.c:803
Date: Fri, 08 Apr 2016 17:08:00 -0000
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--- Comment #53 from Bernd Schmidt <bernds at gcc dot gnu.org> ---
Hmm. Something got reallocated perhaps? It's not entirely obvious to me where
that would happen. Does the following help at all?
Index: directives.c
===================================================================
--- directives.c (revision 234831)
+++ directives.c (working copy)
@@ -977,6 +977,8 @@ do_linemarker (cpp_reader *pfile)
{
struct line_maps *line_table = pfile->line_table;
const line_map_ordinary *map = LINEMAPS_LAST_ORDINARY_MAP (line_table);
+ bool main_file_p = MAIN_FILE_P (map);
+ const line_map_ordinary *from = INCLUDED_FROM (pfile->line_table, map);
const cpp_token *token;
const char *new_file = ORDINARY_MAP_FILE_NAME (map);
linenum_type new_lineno;
@@ -1048,10 +1050,9 @@ do_linemarker (cpp_reader *pfile)
if (reason == LC_LEAVE)
{
- const line_map_ordinary *from;
- if (MAIN_FILE_P (map)
+ if (main_file_p
|| (new_file
- && (from = INCLUDED_FROM (pfile->line_table, map)) != NULL
+ && from != NULL
&& filename_cmp (ORDINARY_MAP_FILE_NAME (from), new_file) != 0))
{
cpp_warning (pfile, CPP_W_NONE,
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Subject: [Bug bootstrap/66638] [6 Regression] profiledbootstrap failure on x86-64 with LTO
Date: Fri, 08 Apr 2016 17:09:00 -0000
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--- Comment #7 from ctice at gcc dot gnu.org ---
Author: ctice
Date: Fri Apr 8 17:09:09 2016
New Revision: 234832
URL: https://gcc.gnu.org/viewcvs?rev=234832&root=gcc&view=rev
Log:
Unify changes with Android's GCC 4.9 compiler.
Add the following changes from the Android
GCC 4.9 compiler (mostly adding fixes for aarch64):
Fix mingw build breakage
1) Add missing _GCOV_fopen if !__KERNEL__
2) Use _fullpath
Backport Cortex-A57's machine description support from trunk
Adjust generic move costs for aarch64. Backport from trunk
Enable C++ exceptions and RTTI by default.
Modify LINK_SPEC to pass --fix-cortex-a53-843419 as default
Rename libstdc++.so to libgnustl_shared.so when enabling bionic libs.
Drop mips64r2 from Android compiler's multilib
Merge "Drop mips64r2 from Android compiler's multilib"
Adjust several costs for AArch64:
Refactor aarch64_address_costs; add cost tables for Cortex-A7;
better estimate cost of building a constant; wrap aarch64_rtx_costs
to dump verbose output; factor out common MULT cases; det default
costs and handle vector modes; cost memory accesses using address
costs; better cost logical operations; improve costs for div/mod and
sign/zero extend operations; cost comparisons, flag setting
operators and IF_THEN_ELSE; cost more Floating point RTX; cost
TRUNCATE, SET, SYMBOL_REF, HIGH and LO_SUM; dump a message if we are
unable to cost an insn; fix typos in cost data structure.
Add several improvements for AArch64 (Backported from GCC 5):
(spill code - swap order in shr patterns; spill code - swap order in
shl pattern; fix aarch64_rtx_costs of PLUS/MINUS; cost operand 0 in
FP compare-with-0.0 case; properly cost FABD pattern; properly
handle mvn-register and add EON+shift pattern and cost
appropriately).
Disable inlining of memcpy for x86 with 'rep movs'.
Default to TLS guard for x86 stack-protector.
Change gcc BASE-VER from 4.9.x-google to 4.9.x
Cherry pick the following fixes from trunk: PR bootstrap/66638, 67954
(svn rev 230894, PR tree-optimization/65447,
PR tree-optimization/52563, tree-optimization/62173,
PR tree-optimization/48052, PR 64878, PR65048, PR65177, PR65735.
Port revision 219584 from linaro/gcc-4_9-branch
Fix for arm64 bad code for copysignl.
Added:
branches/google/gcc-4_9-mobile/gcc/sancov.c
branches/google/gcc-4_9-mobile/gcc/testsuite/gcc.dg/sancov/
branches/google/gcc-4_9-mobile/gcc/testsuite/gcc.dg/sancov/asan.c
branches/google/gcc-4_9-mobile/gcc/testsuite/gcc.dg/sancov/basic0.c
branches/google/gcc-4_9-mobile/gcc/testsuite/gcc.dg/sancov/basic1.c
branches/google/gcc-4_9-mobile/gcc/testsuite/gcc.dg/sancov/basic2.c
Modified:
branches/google/gcc-4_9-mobile/ChangeLog
branches/google/gcc-4_9-mobile/config/futex.m4
branches/google/gcc-4_9-mobile/configure
branches/google/gcc-4_9-mobile/configure.ac
branches/google/gcc-4_9-mobile/gcc/BASE-VER
branches/google/gcc-4_9-mobile/gcc/ChangeLog
branches/google/gcc-4_9-mobile/gcc/Makefile.in
branches/google/gcc-4_9-mobile/gcc/builtins.def
branches/google/gcc-4_9-mobile/gcc/cfghooks.c
branches/google/gcc-4_9-mobile/gcc/cfgloop.c
branches/google/gcc-4_9-mobile/gcc/cfgloop.h
branches/google/gcc-4_9-mobile/gcc/common.opt
branches/google/gcc-4_9-mobile/gcc/config/aarch64/aarch64-cores.def
branches/google/gcc-4_9-mobile/gcc/config/aarch64/aarch64-elf-raw.h
branches/google/gcc-4_9-mobile/gcc/config/aarch64/aarch64-linux.h
branches/google/gcc-4_9-mobile/gcc/config/aarch64/aarch64-protos.h
branches/google/gcc-4_9-mobile/gcc/config/aarch64/aarch64-tune.md
branches/google/gcc-4_9-mobile/gcc/config/aarch64/aarch64.c
branches/google/gcc-4_9-mobile/gcc/config/aarch64/aarch64.md
branches/google/gcc-4_9-mobile/gcc/config/aarch64/aarch64.opt
branches/google/gcc-4_9-mobile/gcc/config/i386/i386.c
branches/google/gcc-4_9-mobile/gcc/config/linux-android.h
branches/google/gcc-4_9-mobile/gcc/config/mips/t-linux-android64
branches/google/gcc-4_9-mobile/gcc/configure
branches/google/gcc-4_9-mobile/gcc/doc/invoke.texi
branches/google/gcc-4_9-mobile/gcc/except.c
branches/google/gcc-4_9-mobile/gcc/expmed.c
branches/google/gcc-4_9-mobile/gcc/gcov-io.h
branches/google/gcc-4_9-mobile/gcc/loop-init.c
branches/google/gcc-4_9-mobile/gcc/lra-constraints.c
branches/google/gcc-4_9-mobile/gcc/omp-low.c
branches/google/gcc-4_9-mobile/gcc/params.def
branches/google/gcc-4_9-mobile/gcc/passes.def
branches/google/gcc-4_9-mobile/gcc/sanitizer.def
branches/google/gcc-4_9-mobile/gcc/testsuite/ChangeLog
branches/google/gcc-4_9-mobile/gcc/testsuite/gcc.dg/tree-ssa/scev-3.c
branches/google/gcc-4_9-mobile/gcc/testsuite/gcc.dg/tree-ssa/scev-4.c
branches/google/gcc-4_9-mobile/gcc/tree-cfg.c
branches/google/gcc-4_9-mobile/gcc/tree-cfg.h
branches/google/gcc-4_9-mobile/gcc/tree-chrec.c
branches/google/gcc-4_9-mobile/gcc/tree-chrec.h
branches/google/gcc-4_9-mobile/gcc/tree-pass.h
branches/google/gcc-4_9-mobile/gcc/tree-scalar-evolution.c
branches/google/gcc-4_9-mobile/gcc/tree-scalar-evolution.h
branches/google/gcc-4_9-mobile/gcc/tree-ssa-loop-ivopts.c
branches/google/gcc-4_9-mobile/gcc/tree-ssa-loop-niter.c
branches/google/gcc-4_9-mobile/gcc/tree-ssa-loop-niter.h
branches/google/gcc-4_9-mobile/gcc/tree-ssa-threadedge.c
branches/google/gcc-4_9-mobile/gcc/tree-ssa-threadupdate.c
branches/google/gcc-4_9-mobile/gcc/tree-ssa-threadupdate.h
branches/google/gcc-4_9-mobile/libgcc/libgcov-util.c
branches/google/gcc-4_9-mobile/libstdc++-v3/Makefile.in
branches/google/gcc-4_9-mobile/libstdc++-v3/acinclude.m4
branches/google/gcc-4_9-mobile/libstdc++-v3/configure
branches/google/gcc-4_9-mobile/libstdc++-v3/configure.ac
branches/google/gcc-4_9-mobile/libstdc++-v3/doc/Makefile.in
branches/google/gcc-4_9-mobile/libstdc++-v3/include/Makefile.in
branches/google/gcc-4_9-mobile/libstdc++-v3/libsupc++/Makefile.in
branches/google/gcc-4_9-mobile/libstdc++-v3/po/Makefile.in
branches/google/gcc-4_9-mobile/libstdc++-v3/python/Makefile.in
branches/google/gcc-4_9-mobile/libstdc++-v3/src/Makefile.am
branches/google/gcc-4_9-mobile/libstdc++-v3/src/Makefile.in
branches/google/gcc-4_9-mobile/libstdc++-v3/src/c++11/Makefile.in
branches/google/gcc-4_9-mobile/libstdc++-v3/src/c++98/Makefile.in
branches/google/gcc-4_9-mobile/libstdc++-v3/testsuite/Makefile.in
>From gcc-bugs-return-521613-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 17:09:57 2016
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From: "ctice at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug testsuite/52563] FAIL: gcc.dg/tree-ssa/scev-[3,4].c scan-tree-dump-times optimized "&a" 1
Date: Fri, 08 Apr 2016 17:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52563
--- Comment #10 from ctice at gcc dot gnu.org ---
Author: ctice
Date: Fri Apr 8 17:09:09 2016
New Revision: 234832
URL: https://gcc.gnu.org/viewcvs?rev=234832&root=gcc&view=rev
Log:
Unify changes with Android's GCC 4.9 compiler.
Add the following changes from the Android
GCC 4.9 compiler (mostly adding fixes for aarch64):
Fix mingw build breakage
1) Add missing _GCOV_fopen if !__KERNEL__
2) Use _fullpath
Backport Cortex-A57's machine description support from trunk
Adjust generic move costs for aarch64. Backport from trunk
Enable C++ exceptions and RTTI by default.
Modify LINK_SPEC to pass --fix-cortex-a53-843419 as default
Rename libstdc++.so to libgnustl_shared.so when enabling bionic libs.
Drop mips64r2 from Android compiler's multilib
Merge "Drop mips64r2 from Android compiler's multilib"
Adjust several costs for AArch64:
Refactor aarch64_address_costs; add cost tables for Cortex-A7;
better estimate cost of building a constant; wrap aarch64_rtx_costs
to dump verbose output; factor out common MULT cases; det default
costs and handle vector modes; cost memory accesses using address
costs; better cost logical operations; improve costs for div/mod and
sign/zero extend operations; cost comparisons, flag setting
operators and IF_THEN_ELSE; cost more Floating point RTX; cost
TRUNCATE, SET, SYMBOL_REF, HIGH and LO_SUM; dump a message if we are
unable to cost an insn; fix typos in cost data structure.
Add several improvements for AArch64 (Backported from GCC 5):
(spill code - swap order in shr patterns; spill code - swap order in
shl pattern; fix aarch64_rtx_costs of PLUS/MINUS; cost operand 0 in
FP compare-with-0.0 case; properly cost FABD pattern; properly
handle mvn-register and add EON+shift pattern and cost
appropriately).
Disable inlining of memcpy for x86 with 'rep movs'.
Default to TLS guard for x86 stack-protector.
Change gcc BASE-VER from 4.9.x-google to 4.9.x
Cherry pick the following fixes from trunk: PR bootstrap/66638, 67954
(svn rev 230894, PR tree-optimization/65447,
PR tree-optimization/52563, tree-optimization/62173,
PR tree-optimization/48052, PR 64878, PR65048, PR65177, PR65735.
Port revision 219584 from linaro/gcc-4_9-branch
Fix for arm64 bad code for copysignl.
Added:
branches/google/gcc-4_9-mobile/gcc/sancov.c
branches/google/gcc-4_9-mobile/gcc/testsuite/gcc.dg/sancov/
branches/google/gcc-4_9-mobile/gcc/testsuite/gcc.dg/sancov/asan.c
branches/google/gcc-4_9-mobile/gcc/testsuite/gcc.dg/sancov/basic0.c
branches/google/gcc-4_9-mobile/gcc/testsuite/gcc.dg/sancov/basic1.c
branches/google/gcc-4_9-mobile/gcc/testsuite/gcc.dg/sancov/basic2.c
Modified:
branches/google/gcc-4_9-mobile/ChangeLog
branches/google/gcc-4_9-mobile/config/futex.m4
branches/google/gcc-4_9-mobile/configure
branches/google/gcc-4_9-mobile/configure.ac
branches/google/gcc-4_9-mobile/gcc/BASE-VER
branches/google/gcc-4_9-mobile/gcc/ChangeLog
branches/google/gcc-4_9-mobile/gcc/Makefile.in
branches/google/gcc-4_9-mobile/gcc/builtins.def
branches/google/gcc-4_9-mobile/gcc/cfghooks.c
branches/google/gcc-4_9-mobile/gcc/cfgloop.c
branches/google/gcc-4_9-mobile/gcc/cfgloop.h
branches/google/gcc-4_9-mobile/gcc/common.opt
branches/google/gcc-4_9-mobile/gcc/config/aarch64/aarch64-cores.def
branches/google/gcc-4_9-mobile/gcc/config/aarch64/aarch64-elf-raw.h
branches/google/gcc-4_9-mobile/gcc/config/aarch64/aarch64-linux.h
branches/google/gcc-4_9-mobile/gcc/config/aarch64/aarch64-protos.h
branches/google/gcc-4_9-mobile/gcc/config/aarch64/aarch64-tune.md
branches/google/gcc-4_9-mobile/gcc/config/aarch64/aarch64.c
branches/google/gcc-4_9-mobile/gcc/config/aarch64/aarch64.md
branches/google/gcc-4_9-mobile/gcc/config/aarch64/aarch64.opt
branches/google/gcc-4_9-mobile/gcc/config/i386/i386.c
branches/google/gcc-4_9-mobile/gcc/config/linux-android.h
branches/google/gcc-4_9-mobile/gcc/config/mips/t-linux-android64
branches/google/gcc-4_9-mobile/gcc/configure
branches/google/gcc-4_9-mobile/gcc/doc/invoke.texi
branches/google/gcc-4_9-mobile/gcc/except.c
branches/google/gcc-4_9-mobile/gcc/expmed.c
branches/google/gcc-4_9-mobile/gcc/gcov-io.h
branches/google/gcc-4_9-mobile/gcc/loop-init.c
branches/google/gcc-4_9-mobile/gcc/lra-constraints.c
branches/google/gcc-4_9-mobile/gcc/omp-low.c
branches/google/gcc-4_9-mobile/gcc/params.def
branches/google/gcc-4_9-mobile/gcc/passes.def
branches/google/gcc-4_9-mobile/gcc/sanitizer.def
branches/google/gcc-4_9-mobile/gcc/testsuite/ChangeLog
branches/google/gcc-4_9-mobile/gcc/testsuite/gcc.dg/tree-ssa/scev-3.c
branches/google/gcc-4_9-mobile/gcc/testsuite/gcc.dg/tree-ssa/scev-4.c
branches/google/gcc-4_9-mobile/gcc/tree-cfg.c
branches/google/gcc-4_9-mobile/gcc/tree-cfg.h
branches/google/gcc-4_9-mobile/gcc/tree-chrec.c
branches/google/gcc-4_9-mobile/gcc/tree-chrec.h
branches/google/gcc-4_9-mobile/gcc/tree-pass.h
branches/google/gcc-4_9-mobile/gcc/tree-scalar-evolution.c
branches/google/gcc-4_9-mobile/gcc/tree-scalar-evolution.h
branches/google/gcc-4_9-mobile/gcc/tree-ssa-loop-ivopts.c
branches/google/gcc-4_9-mobile/gcc/tree-ssa-loop-niter.c
branches/google/gcc-4_9-mobile/gcc/tree-ssa-loop-niter.h
branches/google/gcc-4_9-mobile/gcc/tree-ssa-threadedge.c
branches/google/gcc-4_9-mobile/gcc/tree-ssa-threadupdate.c
branches/google/gcc-4_9-mobile/gcc/tree-ssa-threadupdate.h
branches/google/gcc-4_9-mobile/libgcc/libgcov-util.c
branches/google/gcc-4_9-mobile/libstdc++-v3/Makefile.in
branches/google/gcc-4_9-mobile/libstdc++-v3/acinclude.m4
branches/google/gcc-4_9-mobile/libstdc++-v3/configure
branches/google/gcc-4_9-mobile/libstdc++-v3/configure.ac
branches/google/gcc-4_9-mobile/libstdc++-v3/doc/Makefile.in
branches/google/gcc-4_9-mobile/libstdc++-v3/include/Makefile.in
branches/google/gcc-4_9-mobile/libstdc++-v3/libsupc++/Makefile.in
branches/google/gcc-4_9-mobile/libstdc++-v3/po/Makefile.in
branches/google/gcc-4_9-mobile/libstdc++-v3/python/Makefile.in
branches/google/gcc-4_9-mobile/libstdc++-v3/src/Makefile.am
branches/google/gcc-4_9-mobile/libstdc++-v3/src/Makefile.in
branches/google/gcc-4_9-mobile/libstdc++-v3/src/c++11/Makefile.in
branches/google/gcc-4_9-mobile/libstdc++-v3/src/c++98/Makefile.in
branches/google/gcc-4_9-mobile/libstdc++-v3/testsuite/Makefile.in
>From gcc-bugs-return-521612-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 17:09:57 2016
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From: "ctice at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/65447] AArch64: iv-opt causes bad addressing
Date: Fri, 08 Apr 2016 17:09:00 -0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65447
--- Comment #5 from ctice at gcc dot gnu.org ---
Author: ctice
Date: Fri Apr 8 17:09:09 2016
New Revision: 234832
URL: https://gcc.gnu.org/viewcvs?rev=234832&root=gcc&view=rev
Log:
Unify changes with Android's GCC 4.9 compiler.
Add the following changes from the Android
GCC 4.9 compiler (mostly adding fixes for aarch64):
Fix mingw build breakage
1) Add missing _GCOV_fopen if !__KERNEL__
2) Use _fullpath
Backport Cortex-A57's machine description support from trunk
Adjust generic move costs for aarch64. Backport from trunk
Enable C++ exceptions and RTTI by default.
Modify LINK_SPEC to pass --fix-cortex-a53-843419 as default
Rename libstdc++.so to libgnustl_shared.so when enabling bionic libs.
Drop mips64r2 from Android compiler's multilib
Merge "Drop mips64r2 from Android compiler's multilib"
Adjust several costs for AArch64:
Refactor aarch64_address_costs; add cost tables for Cortex-A7;
better estimate cost of building a constant; wrap aarch64_rtx_costs
to dump verbose output; factor out common MULT cases; det default
costs and handle vector modes; cost memory accesses using address
costs; better cost logical operations; improve costs for div/mod and
sign/zero extend operations; cost comparisons, flag setting
operators and IF_THEN_ELSE; cost more Floating point RTX; cost
TRUNCATE, SET, SYMBOL_REF, HIGH and LO_SUM; dump a message if we are
unable to cost an insn; fix typos in cost data structure.
Add several improvements for AArch64 (Backported from GCC 5):
(spill code - swap order in shr patterns; spill code - swap order in
shl pattern; fix aarch64_rtx_costs of PLUS/MINUS; cost operand 0 in
FP compare-with-0.0 case; properly cost FABD pattern; properly
handle mvn-register and add EON+shift pattern and cost
appropriately).
Disable inlining of memcpy for x86 with 'rep movs'.
Default to TLS guard for x86 stack-protector.
Change gcc BASE-VER from 4.9.x-google to 4.9.x
Cherry pick the following fixes from trunk: PR bootstrap/66638, 67954
(svn rev 230894, PR tree-optimization/65447,
PR tree-optimization/52563, tree-optimization/62173,
PR tree-optimization/48052, PR 64878, PR65048, PR65177, PR65735.
Port revision 219584 from linaro/gcc-4_9-branch
Fix for arm64 bad code for copysignl.
Added:
branches/google/gcc-4_9-mobile/gcc/sancov.c
branches/google/gcc-4_9-mobile/gcc/testsuite/gcc.dg/sancov/
branches/google/gcc-4_9-mobile/gcc/testsuite/gcc.dg/sancov/asan.c
branches/google/gcc-4_9-mobile/gcc/testsuite/gcc.dg/sancov/basic0.c
branches/google/gcc-4_9-mobile/gcc/testsuite/gcc.dg/sancov/basic1.c
branches/google/gcc-4_9-mobile/gcc/testsuite/gcc.dg/sancov/basic2.c
Modified:
branches/google/gcc-4_9-mobile/ChangeLog
branches/google/gcc-4_9-mobile/config/futex.m4
branches/google/gcc-4_9-mobile/configure
branches/google/gcc-4_9-mobile/configure.ac
branches/google/gcc-4_9-mobile/gcc/BASE-VER
branches/google/gcc-4_9-mobile/gcc/ChangeLog
branches/google/gcc-4_9-mobile/gcc/Makefile.in
branches/google/gcc-4_9-mobile/gcc/builtins.def
branches/google/gcc-4_9-mobile/gcc/cfghooks.c
branches/google/gcc-4_9-mobile/gcc/cfgloop.c
branches/google/gcc-4_9-mobile/gcc/cfgloop.h
branches/google/gcc-4_9-mobile/gcc/common.opt
branches/google/gcc-4_9-mobile/gcc/config/aarch64/aarch64-cores.def
branches/google/gcc-4_9-mobile/gcc/config/aarch64/aarch64-elf-raw.h
branches/google/gcc-4_9-mobile/gcc/config/aarch64/aarch64-linux.h
branches/google/gcc-4_9-mobile/gcc/config/aarch64/aarch64-protos.h
branches/google/gcc-4_9-mobile/gcc/config/aarch64/aarch64-tune.md
branches/google/gcc-4_9-mobile/gcc/config/aarch64/aarch64.c
branches/google/gcc-4_9-mobile/gcc/config/aarch64/aarch64.md
branches/google/gcc-4_9-mobile/gcc/config/aarch64/aarch64.opt
branches/google/gcc-4_9-mobile/gcc/config/i386/i386.c
branches/google/gcc-4_9-mobile/gcc/config/linux-android.h
branches/google/gcc-4_9-mobile/gcc/config/mips/t-linux-android64
branches/google/gcc-4_9-mobile/gcc/configure
branches/google/gcc-4_9-mobile/gcc/doc/invoke.texi
branches/google/gcc-4_9-mobile/gcc/except.c
branches/google/gcc-4_9-mobile/gcc/expmed.c
branches/google/gcc-4_9-mobile/gcc/gcov-io.h
branches/google/gcc-4_9-mobile/gcc/loop-init.c
branches/google/gcc-4_9-mobile/gcc/lra-constraints.c
branches/google/gcc-4_9-mobile/gcc/omp-low.c
branches/google/gcc-4_9-mobile/gcc/params.def
branches/google/gcc-4_9-mobile/gcc/passes.def
branches/google/gcc-4_9-mobile/gcc/sanitizer.def
branches/google/gcc-4_9-mobile/gcc/testsuite/ChangeLog
branches/google/gcc-4_9-mobile/gcc/testsuite/gcc.dg/tree-ssa/scev-3.c
branches/google/gcc-4_9-mobile/gcc/testsuite/gcc.dg/tree-ssa/scev-4.c
branches/google/gcc-4_9-mobile/gcc/tree-cfg.c
branches/google/gcc-4_9-mobile/gcc/tree-cfg.h
branches/google/gcc-4_9-mobile/gcc/tree-chrec.c
branches/google/gcc-4_9-mobile/gcc/tree-chrec.h
branches/google/gcc-4_9-mobile/gcc/tree-pass.h
branches/google/gcc-4_9-mobile/gcc/tree-scalar-evolution.c
branches/google/gcc-4_9-mobile/gcc/tree-scalar-evolution.h
branches/google/gcc-4_9-mobile/gcc/tree-ssa-loop-ivopts.c
branches/google/gcc-4_9-mobile/gcc/tree-ssa-loop-niter.c
branches/google/gcc-4_9-mobile/gcc/tree-ssa-loop-niter.h
branches/google/gcc-4_9-mobile/gcc/tree-ssa-threadedge.c
branches/google/gcc-4_9-mobile/gcc/tree-ssa-threadupdate.c
branches/google/gcc-4_9-mobile/gcc/tree-ssa-threadupdate.h
branches/google/gcc-4_9-mobile/libgcc/libgcov-util.c
branches/google/gcc-4_9-mobile/libstdc++-v3/Makefile.in
branches/google/gcc-4_9-mobile/libstdc++-v3/acinclude.m4
branches/google/gcc-4_9-mobile/libstdc++-v3/configure
branches/google/gcc-4_9-mobile/libstdc++-v3/configure.ac
branches/google/gcc-4_9-mobile/libstdc++-v3/doc/Makefile.in
branches/google/gcc-4_9-mobile/libstdc++-v3/include/Makefile.in
branches/google/gcc-4_9-mobile/libstdc++-v3/libsupc++/Makefile.in
branches/google/gcc-4_9-mobile/libstdc++-v3/po/Makefile.in
branches/google/gcc-4_9-mobile/libstdc++-v3/python/Makefile.in
branches/google/gcc-4_9-mobile/libstdc++-v3/src/Makefile.am
branches/google/gcc-4_9-mobile/libstdc++-v3/src/Makefile.in
branches/google/gcc-4_9-mobile/libstdc++-v3/src/c++11/Makefile.in
branches/google/gcc-4_9-mobile/libstdc++-v3/src/c++98/Makefile.in
branches/google/gcc-4_9-mobile/libstdc++-v3/testsuite/Makefile.in
>From gcc-bugs-return-521615-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 17:10:08 2016
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From: "ctice at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/48052] loop not vectorized if index is "unsigned int"
Date: Fri, 08 Apr 2016 17:10:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=48052
--- Comment #18 from ctice at gcc dot gnu.org ---
Author: ctice
Date: Fri Apr 8 17:09:09 2016
New Revision: 234832
URL: https://gcc.gnu.org/viewcvs?rev=234832&root=gcc&view=rev
Log:
Unify changes with Android's GCC 4.9 compiler.
Add the following changes from the Android
GCC 4.9 compiler (mostly adding fixes for aarch64):
Fix mingw build breakage
1) Add missing _GCOV_fopen if !__KERNEL__
2) Use _fullpath
Backport Cortex-A57's machine description support from trunk
Adjust generic move costs for aarch64. Backport from trunk
Enable C++ exceptions and RTTI by default.
Modify LINK_SPEC to pass --fix-cortex-a53-843419 as default
Rename libstdc++.so to libgnustl_shared.so when enabling bionic libs.
Drop mips64r2 from Android compiler's multilib
Merge "Drop mips64r2 from Android compiler's multilib"
Adjust several costs for AArch64:
Refactor aarch64_address_costs; add cost tables for Cortex-A7;
better estimate cost of building a constant; wrap aarch64_rtx_costs
to dump verbose output; factor out common MULT cases; det default
costs and handle vector modes; cost memory accesses using address
costs; better cost logical operations; improve costs for div/mod and
sign/zero extend operations; cost comparisons, flag setting
operators and IF_THEN_ELSE; cost more Floating point RTX; cost
TRUNCATE, SET, SYMBOL_REF, HIGH and LO_SUM; dump a message if we are
unable to cost an insn; fix typos in cost data structure.
Add several improvements for AArch64 (Backported from GCC 5):
(spill code - swap order in shr patterns; spill code - swap order in
shl pattern; fix aarch64_rtx_costs of PLUS/MINUS; cost operand 0 in
FP compare-with-0.0 case; properly cost FABD pattern; properly
handle mvn-register and add EON+shift pattern and cost
appropriately).
Disable inlining of memcpy for x86 with 'rep movs'.
Default to TLS guard for x86 stack-protector.
Change gcc BASE-VER from 4.9.x-google to 4.9.x
Cherry pick the following fixes from trunk: PR bootstrap/66638, 67954
(svn rev 230894, PR tree-optimization/65447,
PR tree-optimization/52563, tree-optimization/62173,
PR tree-optimization/48052, PR 64878, PR65048, PR65177, PR65735.
Port revision 219584 from linaro/gcc-4_9-branch
Fix for arm64 bad code for copysignl.
Added:
branches/google/gcc-4_9-mobile/gcc/sancov.c
branches/google/gcc-4_9-mobile/gcc/testsuite/gcc.dg/sancov/
branches/google/gcc-4_9-mobile/gcc/testsuite/gcc.dg/sancov/asan.c
branches/google/gcc-4_9-mobile/gcc/testsuite/gcc.dg/sancov/basic0.c
branches/google/gcc-4_9-mobile/gcc/testsuite/gcc.dg/sancov/basic1.c
branches/google/gcc-4_9-mobile/gcc/testsuite/gcc.dg/sancov/basic2.c
Modified:
branches/google/gcc-4_9-mobile/ChangeLog
branches/google/gcc-4_9-mobile/config/futex.m4
branches/google/gcc-4_9-mobile/configure
branches/google/gcc-4_9-mobile/configure.ac
branches/google/gcc-4_9-mobile/gcc/BASE-VER
branches/google/gcc-4_9-mobile/gcc/ChangeLog
branches/google/gcc-4_9-mobile/gcc/Makefile.in
branches/google/gcc-4_9-mobile/gcc/builtins.def
branches/google/gcc-4_9-mobile/gcc/cfghooks.c
branches/google/gcc-4_9-mobile/gcc/cfgloop.c
branches/google/gcc-4_9-mobile/gcc/cfgloop.h
branches/google/gcc-4_9-mobile/gcc/common.opt
branches/google/gcc-4_9-mobile/gcc/config/aarch64/aarch64-cores.def
branches/google/gcc-4_9-mobile/gcc/config/aarch64/aarch64-elf-raw.h
branches/google/gcc-4_9-mobile/gcc/config/aarch64/aarch64-linux.h
branches/google/gcc-4_9-mobile/gcc/config/aarch64/aarch64-protos.h
branches/google/gcc-4_9-mobile/gcc/config/aarch64/aarch64-tune.md
branches/google/gcc-4_9-mobile/gcc/config/aarch64/aarch64.c
branches/google/gcc-4_9-mobile/gcc/config/aarch64/aarch64.md
branches/google/gcc-4_9-mobile/gcc/config/aarch64/aarch64.opt
branches/google/gcc-4_9-mobile/gcc/config/i386/i386.c
branches/google/gcc-4_9-mobile/gcc/config/linux-android.h
branches/google/gcc-4_9-mobile/gcc/config/mips/t-linux-android64
branches/google/gcc-4_9-mobile/gcc/configure
branches/google/gcc-4_9-mobile/gcc/doc/invoke.texi
branches/google/gcc-4_9-mobile/gcc/except.c
branches/google/gcc-4_9-mobile/gcc/expmed.c
branches/google/gcc-4_9-mobile/gcc/gcov-io.h
branches/google/gcc-4_9-mobile/gcc/loop-init.c
branches/google/gcc-4_9-mobile/gcc/lra-constraints.c
branches/google/gcc-4_9-mobile/gcc/omp-low.c
branches/google/gcc-4_9-mobile/gcc/params.def
branches/google/gcc-4_9-mobile/gcc/passes.def
branches/google/gcc-4_9-mobile/gcc/sanitizer.def
branches/google/gcc-4_9-mobile/gcc/testsuite/ChangeLog
branches/google/gcc-4_9-mobile/gcc/testsuite/gcc.dg/tree-ssa/scev-3.c
branches/google/gcc-4_9-mobile/gcc/testsuite/gcc.dg/tree-ssa/scev-4.c
branches/google/gcc-4_9-mobile/gcc/tree-cfg.c
branches/google/gcc-4_9-mobile/gcc/tree-cfg.h
branches/google/gcc-4_9-mobile/gcc/tree-chrec.c
branches/google/gcc-4_9-mobile/gcc/tree-chrec.h
branches/google/gcc-4_9-mobile/gcc/tree-pass.h
branches/google/gcc-4_9-mobile/gcc/tree-scalar-evolution.c
branches/google/gcc-4_9-mobile/gcc/tree-scalar-evolution.h
branches/google/gcc-4_9-mobile/gcc/tree-ssa-loop-ivopts.c
branches/google/gcc-4_9-mobile/gcc/tree-ssa-loop-niter.c
branches/google/gcc-4_9-mobile/gcc/tree-ssa-loop-niter.h
branches/google/gcc-4_9-mobile/gcc/tree-ssa-threadedge.c
branches/google/gcc-4_9-mobile/gcc/tree-ssa-threadupdate.c
branches/google/gcc-4_9-mobile/gcc/tree-ssa-threadupdate.h
branches/google/gcc-4_9-mobile/libgcc/libgcov-util.c
branches/google/gcc-4_9-mobile/libstdc++-v3/Makefile.in
branches/google/gcc-4_9-mobile/libstdc++-v3/acinclude.m4
branches/google/gcc-4_9-mobile/libstdc++-v3/configure
branches/google/gcc-4_9-mobile/libstdc++-v3/configure.ac
branches/google/gcc-4_9-mobile/libstdc++-v3/doc/Makefile.in
branches/google/gcc-4_9-mobile/libstdc++-v3/include/Makefile.in
branches/google/gcc-4_9-mobile/libstdc++-v3/libsupc++/Makefile.in
branches/google/gcc-4_9-mobile/libstdc++-v3/po/Makefile.in
branches/google/gcc-4_9-mobile/libstdc++-v3/python/Makefile.in
branches/google/gcc-4_9-mobile/libstdc++-v3/src/Makefile.am
branches/google/gcc-4_9-mobile/libstdc++-v3/src/Makefile.in
branches/google/gcc-4_9-mobile/libstdc++-v3/src/c++11/Makefile.in
branches/google/gcc-4_9-mobile/libstdc++-v3/src/c++98/Makefile.in
branches/google/gcc-4_9-mobile/libstdc++-v3/testsuite/Makefile.in
>From gcc-bugs-return-521614-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 17:09:58 2016
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From: "ctice at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/64878] [5 Regression] Miscompilation of nntpgrab
Date: Fri, 08 Apr 2016 17:10:00 -0000
X-Bugzilla-Reason: CC
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64878
--- Comment #10 from ctice at gcc dot gnu.org ---
Author: ctice
Date: Fri Apr 8 17:09:09 2016
New Revision: 234832
URL: https://gcc.gnu.org/viewcvs?rev=234832&root=gcc&view=rev
Log:
Unify changes with Android's GCC 4.9 compiler.
Add the following changes from the Android
GCC 4.9 compiler (mostly adding fixes for aarch64):
Fix mingw build breakage
1) Add missing _GCOV_fopen if !__KERNEL__
2) Use _fullpath
Backport Cortex-A57's machine description support from trunk
Adjust generic move costs for aarch64. Backport from trunk
Enable C++ exceptions and RTTI by default.
Modify LINK_SPEC to pass --fix-cortex-a53-843419 as default
Rename libstdc++.so to libgnustl_shared.so when enabling bionic libs.
Drop mips64r2 from Android compiler's multilib
Merge "Drop mips64r2 from Android compiler's multilib"
Adjust several costs for AArch64:
Refactor aarch64_address_costs; add cost tables for Cortex-A7;
better estimate cost of building a constant; wrap aarch64_rtx_costs
to dump verbose output; factor out common MULT cases; det default
costs and handle vector modes; cost memory accesses using address
costs; better cost logical operations; improve costs for div/mod and
sign/zero extend operations; cost comparisons, flag setting
operators and IF_THEN_ELSE; cost more Floating point RTX; cost
TRUNCATE, SET, SYMBOL_REF, HIGH and LO_SUM; dump a message if we are
unable to cost an insn; fix typos in cost data structure.
Add several improvements for AArch64 (Backported from GCC 5):
(spill code - swap order in shr patterns; spill code - swap order in
shl pattern; fix aarch64_rtx_costs of PLUS/MINUS; cost operand 0 in
FP compare-with-0.0 case; properly cost FABD pattern; properly
handle mvn-register and add EON+shift pattern and cost
appropriately).
Disable inlining of memcpy for x86 with 'rep movs'.
Default to TLS guard for x86 stack-protector.
Change gcc BASE-VER from 4.9.x-google to 4.9.x
Cherry pick the following fixes from trunk: PR bootstrap/66638, 67954
(svn rev 230894, PR tree-optimization/65447,
PR tree-optimization/52563, tree-optimization/62173,
PR tree-optimization/48052, PR 64878, PR65048, PR65177, PR65735.
Port revision 219584 from linaro/gcc-4_9-branch
Fix for arm64 bad code for copysignl.
Added:
branches/google/gcc-4_9-mobile/gcc/sancov.c
branches/google/gcc-4_9-mobile/gcc/testsuite/gcc.dg/sancov/
branches/google/gcc-4_9-mobile/gcc/testsuite/gcc.dg/sancov/asan.c
branches/google/gcc-4_9-mobile/gcc/testsuite/gcc.dg/sancov/basic0.c
branches/google/gcc-4_9-mobile/gcc/testsuite/gcc.dg/sancov/basic1.c
branches/google/gcc-4_9-mobile/gcc/testsuite/gcc.dg/sancov/basic2.c
Modified:
branches/google/gcc-4_9-mobile/ChangeLog
branches/google/gcc-4_9-mobile/config/futex.m4
branches/google/gcc-4_9-mobile/configure
branches/google/gcc-4_9-mobile/configure.ac
branches/google/gcc-4_9-mobile/gcc/BASE-VER
branches/google/gcc-4_9-mobile/gcc/ChangeLog
branches/google/gcc-4_9-mobile/gcc/Makefile.in
branches/google/gcc-4_9-mobile/gcc/builtins.def
branches/google/gcc-4_9-mobile/gcc/cfghooks.c
branches/google/gcc-4_9-mobile/gcc/cfgloop.c
branches/google/gcc-4_9-mobile/gcc/cfgloop.h
branches/google/gcc-4_9-mobile/gcc/common.opt
branches/google/gcc-4_9-mobile/gcc/config/aarch64/aarch64-cores.def
branches/google/gcc-4_9-mobile/gcc/config/aarch64/aarch64-elf-raw.h
branches/google/gcc-4_9-mobile/gcc/config/aarch64/aarch64-linux.h
branches/google/gcc-4_9-mobile/gcc/config/aarch64/aarch64-protos.h
branches/google/gcc-4_9-mobile/gcc/config/aarch64/aarch64-tune.md
branches/google/gcc-4_9-mobile/gcc/config/aarch64/aarch64.c
branches/google/gcc-4_9-mobile/gcc/config/aarch64/aarch64.md
branches/google/gcc-4_9-mobile/gcc/config/aarch64/aarch64.opt
branches/google/gcc-4_9-mobile/gcc/config/i386/i386.c
branches/google/gcc-4_9-mobile/gcc/config/linux-android.h
branches/google/gcc-4_9-mobile/gcc/config/mips/t-linux-android64
branches/google/gcc-4_9-mobile/gcc/configure
branches/google/gcc-4_9-mobile/gcc/doc/invoke.texi
branches/google/gcc-4_9-mobile/gcc/except.c
branches/google/gcc-4_9-mobile/gcc/expmed.c
branches/google/gcc-4_9-mobile/gcc/gcov-io.h
branches/google/gcc-4_9-mobile/gcc/loop-init.c
branches/google/gcc-4_9-mobile/gcc/lra-constraints.c
branches/google/gcc-4_9-mobile/gcc/omp-low.c
branches/google/gcc-4_9-mobile/gcc/params.def
branches/google/gcc-4_9-mobile/gcc/passes.def
branches/google/gcc-4_9-mobile/gcc/sanitizer.def
branches/google/gcc-4_9-mobile/gcc/testsuite/ChangeLog
branches/google/gcc-4_9-mobile/gcc/testsuite/gcc.dg/tree-ssa/scev-3.c
branches/google/gcc-4_9-mobile/gcc/testsuite/gcc.dg/tree-ssa/scev-4.c
branches/google/gcc-4_9-mobile/gcc/tree-cfg.c
branches/google/gcc-4_9-mobile/gcc/tree-cfg.h
branches/google/gcc-4_9-mobile/gcc/tree-chrec.c
branches/google/gcc-4_9-mobile/gcc/tree-chrec.h
branches/google/gcc-4_9-mobile/gcc/tree-pass.h
branches/google/gcc-4_9-mobile/gcc/tree-scalar-evolution.c
branches/google/gcc-4_9-mobile/gcc/tree-scalar-evolution.h
branches/google/gcc-4_9-mobile/gcc/tree-ssa-loop-ivopts.c
branches/google/gcc-4_9-mobile/gcc/tree-ssa-loop-niter.c
branches/google/gcc-4_9-mobile/gcc/tree-ssa-loop-niter.h
branches/google/gcc-4_9-mobile/gcc/tree-ssa-threadedge.c
branches/google/gcc-4_9-mobile/gcc/tree-ssa-threadupdate.c
branches/google/gcc-4_9-mobile/gcc/tree-ssa-threadupdate.h
branches/google/gcc-4_9-mobile/libgcc/libgcov-util.c
branches/google/gcc-4_9-mobile/libstdc++-v3/Makefile.in
branches/google/gcc-4_9-mobile/libstdc++-v3/acinclude.m4
branches/google/gcc-4_9-mobile/libstdc++-v3/configure
branches/google/gcc-4_9-mobile/libstdc++-v3/configure.ac
branches/google/gcc-4_9-mobile/libstdc++-v3/doc/Makefile.in
branches/google/gcc-4_9-mobile/libstdc++-v3/include/Makefile.in
branches/google/gcc-4_9-mobile/libstdc++-v3/libsupc++/Makefile.in
branches/google/gcc-4_9-mobile/libstdc++-v3/po/Makefile.in
branches/google/gcc-4_9-mobile/libstdc++-v3/python/Makefile.in
branches/google/gcc-4_9-mobile/libstdc++-v3/src/Makefile.am
branches/google/gcc-4_9-mobile/libstdc++-v3/src/Makefile.in
branches/google/gcc-4_9-mobile/libstdc++-v3/src/c++11/Makefile.in
branches/google/gcc-4_9-mobile/libstdc++-v3/src/c++98/Makefile.in
branches/google/gcc-4_9-mobile/libstdc++-v3/testsuite/Makefile.in
>From gcc-bugs-return-521616-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 17:21:16 2016
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Received: (qmail 6843 invoked by uid 48); 8 Apr 2016 17:21:03 -0000
From: "su at cs dot ucdavis.edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/70602] New: wrong code at -O1 and above on x86_64-linux-gnu in 32-bit mode (and at -Os only in 64-bit mode)
Date: Fri, 08 Apr 2016 17:21:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70602
Bug ID: 70602
Summary: wrong code at -O1 and above on x86_64-linux-gnu in
32-bit mode (and at -Os only in 64-bit mode)
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: su at cs dot ucdavis.edu
Target Milestone: ---
The current gcc trunk miscompiles the following code on x86_64-linux-gnu at -O1
and above in the 32-bit mode and at -Os only in the 64-bit mode.
This is a regression from 5.3.x.
$ gcc-trunk -v
Using built-in specs.
COLLECT_GCC=gcc-trunk
COLLECT_LTO_WRAPPER=/usr/local/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/6.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto
--prefix=/usr/local/gcc-trunk --disable-bootstrap
Thread model: posix
gcc version 6.0.0 20160408 (experimental) [trunk revision 234826] (GCC)
$
$ gcc-trunk -m32 -O0 small.c; ./a.out
$ gcc-5.3 -m32 -O1 small.c; ./a.out
$
$ gcc-trunk -m32 -O1 small.c
$ ./a.out
Segmentation fault (core dumped)
$
-----------------------------------------
#pragma pack(1)
struct S0
{
int f0:1;
int f1:20;
};
int a, b, c;
int
main ()
{
for (; a < 1; a++)
{
struct S0 e[] = { {0, 9}, {0, 9}, {0, 9}, {0, 0}, {0, 9}, {0, 9}, {0, 9},
{0, 0}, {0, 9}, {0, 9}, {0, 9}, {0, 0}, {0, 9}, {0, 9},
{0, 9}, {0, 0}, {0, 9}, {0, 9}, {0, 9}, {0, 0}, {0, 9}
};
b = b || e[0].f0;
c = e[0].f1;
}
return 0;
}
>From gcc-bugs-return-521617-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 17:22:03 2016
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Subject: [Bug target/70574] [5/6 Regression] wrong code with -mavx2, read of partially initialised stack variable
Date: Fri, 08 Apr 2016 17:22:00 -0000
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Apr 8 17:21:17 2016
New Revision: 234833
URL: https://gcc.gnu.org/viewcvs?rev=234833&root=gcc&view=rev
Log:
PR rtl-optimization/70574
* fwprop.c (forward_propagate_and_simplify): Don't add
REG_EQUAL note if DF_REF_REG (use) is a paradoxical subreg.
(try_fwprop_subst): Don't add REG_EQUAL note if there are any
paradoxical subregs within *loc.
* gcc.target/i386/avx2-pr70574.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/avx2-pr70574.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/fwprop.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-521618-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 17:25:50 2016
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Subject: [Bug tree-optimization/48052] loop not vectorized if index is "unsigned int"
Date: Fri, 08 Apr 2016 17:25:00 -0000
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--- Comment #19 from amker at gcc dot gnu.org ---
I think this is fixed now.
>From gcc-bugs-return-521619-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 17:26:51 2016
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Subject: [Bug rtl-optimization/70602] [6 Regression] wrong code at -O1 and above on x86_64-linux-gnu in 32-bit mode (and at -Os only in 64-bit mode)
Date: Fri, 08 Apr 2016 17:26:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-08
CC| |mpolacek at gcc dot gnu.org
Target Milestone|--- |6.0
Summary|wrong code at -O1 and above |[6 Regression] wrong code
|on x86_64-linux-gnu in |at -O1 and above on
|32-bit mode (and at -Os |x86_64-linux-gnu in 32-bit
|only in 64-bit mode) |mode (and at -Os only in
| |64-bit mode)
Ever confirmed|0 |1
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Seems like it started with
commit 331e4fdb71a64cd1f37866075a06d4de4497c95c
Author: alalaw01 <alalaw01@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Fri Mar 11 12:08:01 2016 +0000
Fix PR/70013
gcc:
PR tree-optimization/70013
* tree-sra.c (analyze_access_subtree): Also set grp_unscalarized_data
for constant-pool entries.
gcc/testsuite:
* gcc.dg/tree-ssa/sra-20.c: New.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@234138
138bc75d-0d04-0410-961f-82ee72b054a4
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Subject: [Bug middle-end/70593] [6 Regression] Miscompilation of xen starting with r226901
Date: Fri, 08 Apr 2016 17:29:00 -0000
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Apr 8 17:28:20 2016
New Revision: 234834
URL: https://gcc.gnu.org/viewcvs?rev=234834&root=gcc&view=rev
Log:
PR middle-end/70593
* tree-ssa-coalesce.c (build_ssa_conflict_graph): For stmt
with multiple SSA_NAME defs, force the outputs other than first
to be live before calling live_track_process_def on each output.
* gcc.target/i386/pr70593.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr70593.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-coalesce.c
>From gcc-bugs-return-521622-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 17:30:38 2016
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Subject: [Bug middle-end/70593] [6 Regression] Miscompilation of xen starting with r226901
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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.
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Subject: [Bug target/70574] [5 Regression] wrong code with -mavx2, read of partially initialised stack variable
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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
Summary|[5/6 Regression] wrong code |[5 Regression] wrong code
|with -mavx2, read of |with -mavx2, read of
|partially initialised stack |partially initialised stack
|variable |variable
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed on the trunk so far.
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Subject: [Bug rtl-optimization/70602] [6 Regression] wrong code at -O1 and above on x86_64-linux-gnu in 32-bit mode (and at -Os only in 64-bit mode)
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |alan.lawrence at arm dot com,
| |jakub at gcc dot gnu.org,
| |jamborm at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The bug is in addition of
+ MEM[(struct S0[21] *)&*.LC0].f1 = SR.7_2;
for constant_decl_p (root->base) we really can't ever store anything there, we
can just read it.
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Subject: [Bug rtl-optimization/70602] [6 Regression] wrong code at -O1 and above on x86_64-linux-gnu in 32-bit mode (and at -Os only in 64-bit mode)
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The following patch fixes this:
--- gcc/tree-sra.c (revision 234833)
+++ gcc/tree-sra.c (working copy)
@@ -2743,6 +2743,9 @@ generate_subtree_copies (struct access *
gimple_stmt_iterator *gsi, bool write,
bool insert_after, location_t loc)
{
+ /* Never write anything into constant pool decls. */
+ if (!write && constant_decl_p (agg))
+ return;
do
{
if (chunk_size && access->offset >= start_offset + chunk_size)
but I wonder if it just isn't a band-aid. Though, from what I remember about
SRA, when there are gaps it sometimes just does this weird copying there and
back. Martin, your thoughts on this?
>From gcc-bugs-return-521625-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 18:34:18 2016
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Subject: [Bug debug/70578] internal compiler error: in output_index_string, at dwarf2out.c with -gsplit-dwarf
Date: Fri, 08 Apr 2016 18:34:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2016-04-08
Assignee|unassigned at gcc dot gnu.org |ccoutant at gmail dot com
Ever confirmed|0 |1
>From gcc-bugs-return-521626-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 18:47:45 2016
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From: "mhadji at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70603] New: gcc alignas issue with pointers to template class
Date: Fri, 08 Apr 2016 18:47:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70603
Bug ID: 70603
Summary: gcc alignas issue with pointers to template class
Product: gcc
Version: 4.9.2
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I am using gcc 4.9.2 and I am trying to properly align statically initialized
arrays for use with AVX. Here is the gist of the code that segfaults due to
alignment issues:
#include <iostream>
#include <cstddef>
struct B {
alignas(32) double x[1] = {0};
};
struct A
{
A() { b1 = new B(); b2 = new B(); }
B* b1;
B* b2;
};
int main(int argc, char** argv) {
A a;
int ret = (ptrdiff_t) a.b1->x % 32 + (ptrdiff_t) a.b2->x % 32;
std::cout << (ptrdiff_t) a.b1->x % 32 << "," << (ptrdiff_t) a.b2->x % 32 <<
"\n";
return ret;
}
On my system array a.b2->x is not aligned on a 32 byte boundary. The size of x
does not matter, as long as it is an array (so "double x = 0" works fine). If I
make the pointers to B statically allocated members instead, it works properly.
If I create local variables *b1 and *b2 inside main, it works properly. If I
use dynamically allocated arrays inside class A and posix_malloc, it works
properly.
>From gcc-bugs-return-521627-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 19:02:06 2016
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Subject: [Bug c++/70603] gcc alignas issue with pointers to class
Date: Fri, 08 Apr 2016 19:02:00 -0000
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--- Comment #1 from Marios Hadjieleftheriou <mhadji at gmail dot com> ---
I just tried using 5.2.0 and I get the same issue.
>From gcc-bugs-return-521628-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 19:10:57 2016
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Subject: [Bug c/70604] New: switch statement optimization creates dead code
Date: Fri, 08 Apr 2016 19:10:00 -0000
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Bug ID: 70604
Summary: switch statement optimization creates dead code
Product: gcc
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Created attachment 38226
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38226&action=edit
iscsi_target.i.gz
The linux kernel has a new tool named "objtool" which follows all possible code
paths for every .o file, looking for abnormalities. In rare cases it has
stumbled on a gcc optimization issue related to switch statements, which leaves
some dead code (unreachable instructions) laying around, resulting in increased
code size and confusing assembler code.
Note: For some reason the likelihood of seeing this problem seems to have
diminished from gcc 5.3.1 to gcc 6.0. We've seen the problem in three separate
object files in the kernel with gcc 5.3.1, but with gcc 6.0 there's only one
known occurrence of this issue. Further, even in that one case, the size of
the dead code has decreased from several instructions in 5.3.1 to only a single
unreachable instruction in 6.0.
Here are the relevant assembler code excerpts, using gcc 6.0:
iscsit_handle_task_mgt_cmd:
[...snip...]
jmp *.L6212+64(%rip) #
.section .rodata
.align 8
.align 4
.L6212:
.quad .L6211
.quad .L6070
.quad .L6214
.quad .L6214
.quad .L6214
.quad .L6214
.quad .L6082
.quad .L6089
.quad .L6096
.text
[...snip...]
jmp .L6196 #
.L6211:
movl $8, %esi #, _315
.L6213:
movq $.LC48, %rdi #,
There's an indirect jump instruction in .text, along with a jump table in
.rodata, which is a common pattern for switch statements. But this one's a
little different than the normal pattern: the indirect jump is hard-coded to
use a single entry in the jump table. The other jump table entries are unused.
Further, the code referenced in one of the entries (.L6211) is dead code and
completely unreachable from anywhere in the function.
Note that the -fsanitize=unreachable option is enabled, but this seems
unrelated: __builtin_unreachable() doesn't appear to have been used for this
code path, and the unreachable code block doesn't have a call to
__ubsan_handle_builtin_unreachable.
So to summarize, the issues are:
1) dead code in .text (in this case, the function only has one unreachable
instruction)
2) mostly unused (and completely unnecessary) jump table in .rodata
3) unnecessary indirect jump (a direct jump could be used instead)
$ gcc -v
Using built-in specs.
COLLECT_GCC=/usr/bin/gcc
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-redhat-linux/6.0.0/lto-wrapper
Target: x86_64-redhat-linux
Configured with: ../configure --enable-bootstrap
--enable-languages=c,c++,objc,obj-c++,fortran,ada,go,lto --prefix=/usr
--mandir=/usr/share/man --infodir=/usr/share/info
--with-bugurl=http://bugzilla.redhat.com/bugzilla --enable-shared
--enable-threads=posix --enable-checking=release --enable-multilib
--with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions
--enable-gnu-unique-object --enable-linker-build-id
--with-linker-hash-style=gnu --enable-plugin --enable-initfini-array
--disable-libgcj --with-isl --enable-libmpx --enable-gnu-indirect-function
--with-tune=generic --with-arch_32=i686 --build=x86_64-redhat-linux
Thread model: posix
gcc version 6.0.0 20160311 (Red Hat 6.0.0-0.17) (GCC)
$ gcc -Wp,-MD,drivers/target/iscsi/.iscsi_target.o.d -nostdinc
-I./arch/x86/include -Iarch/x86/include/generated/uapi
-Iarch/x86/include/generated -Iinclude -I./arch/x86/include/uapi
-Iarch/x86/include/generated/uapi -I./include/uapi -Iinclude/generated/uapi
-include ./include/linux/kconfig.h -D__KERNEL__ -Wall -Wundef
-Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common
-Werror-implicit-function-declaration -Wno-format-security -std=gnu89 -mno-sse
-mno-mmx -mno-sse2 -mno-3dnow -mno-avx -m64 -falign-jumps=1 -falign-loops=1
-mno-80387 -mno-fp-ret-in-387 -mpreferred-stack-boundary=3 -mskip-rax-setup
-mtune=generic -mno-red-zone -mcmodel=kernel -funit-at-a-time
-maccumulate-outgoing-args -DCONFIG_AS_CFI=1 -DCONFIG_AS_CFI_SIGNAL_FRAME=1
-DCONFIG_AS_CFI_SECTIONS=1 -DCONFIG_AS_FXSAVEQ=1 -DCONFIG_AS_SSSE3=1
-DCONFIG_AS_CRC32=1 -DCONFIG_AS_AVX=1 -DCONFIG_AS_AVX2=1 -DCONFIG_AS_SHA1_NI=1
-DCONFIG_AS_SHA256_NI=1 -pipe -Wno-sign-compare -fno-asynchronous-unwind-tables
-fno-delete-null-pointer-checks -O2 --param=allow-store-data-races=0
-Wframe-larger-than=1024 -fno-stack-protector -Wno-unused-but-set-variable
-fomit-frame-pointer -fno-var-tracking-assignments
-Wdeclaration-after-statement -Wno-pointer-sign -fno-strict-overflow
-fconserve-stack -Werror=implicit-int -Werror=strict-prototypes
-Werror=date-time -Werror=incompatible-pointer-types -DCC_HAVE_ASM_GOTO
-fsanitize=shift -fsanitize=integer-divide-by-zero -fsanitize=unreachable
-fsanitize=vla-bound -fsanitize=null -fsanitize=signed-integer-overflow
-fsanitize=bounds -fsanitize=object-size -fsanitize=returns-nonnull-attribute
-fsanitize=bool -fsanitize=enum -fsanitize=alignment
-Wno-maybe-uninitialized -D"KBUILD_STR(s)=#s"
-D"KBUILD_BASENAME=KBUILD_STR(iscsi_target)"
-D"KBUILD_MODNAME=KBUILD_STR(iscsi_target_mod)" -c -o
drivers/target/iscsi/iscsi_target.o drivers/target/iscsi/iscsi_target.c
This is with upstream Linux tag v4.6-rc2. I've attached a gzipped version of
the .i file and will also attach the Linux .config file.
>From gcc-bugs-return-521629-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 19:11:56 2016
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Subject: [Bug c/70604] switch statement optimization creates dead code
Date: Fri, 08 Apr 2016 19:11:00 -0000
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--- Comment #1 from Josh Poimboeuf <jpoimboe at redhat dot com> ---
Created attachment 38227
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38227&action=edit
Linux .config
>From gcc-bugs-return-521630-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 19:16:44 2016
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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++/70594] [6 Regression] -fcompare-debug failure
Date: Fri, 08 Apr 2016 19:16:00 -0000
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Nathan Sidwell <nathan at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |nathan at gcc dot gnu.org
--- Comment #7 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
The change in debug generation causes purtabations in when GC happens. Such
that in onecase we find a cached result, and in the other case we do not.
When we don't we end up here:
0 allocate_decl_uid () at ../../../src/gcc/tree.c:990
#1 0x0000000001362a01 in copy_node_stat (node=0x7ffff6093e10) at
../../../src/gcc/tree.c:1157
#2 0x00000000010f1a97 in copy_decl_no_change (decl=0x7ffff6093e10,
id=0x7fffffffb120) at ../../../src/gcc/tree-inline.c:5444
#3 0x00000000010e0ebe in remap_decl (decl=0x7ffff6093e10, id=0x7fffffffb120)
at ../../../src/gcc/tree-inline.c:357
#4 0x00000000010f45fe in copy_fn (fn=0x7ffff6168c40, parms=@0x7ffff6683a28:
0x0, result=@0x7ffff6683a30: 0xafafafafafafafaf)
at ../../../src/gcc/tree-inline.c:6148
#5 0x00000000009ec170 in get_fundef_copy (fun=0x7ffff6168c40) at
../../../src/gcc/cp/constexpr.c:1021
copy_node_stat allocates a new UID for decls. so despite its name
'copy_decl_no_change' does cause a change.
That decl never escapes out of the const-expr machinery, but of cause causes
later decls to have different numberings. (which is what we're observing).
I suppose the constexpr machinery could restore the next_decl_uid (and perhaps
others?) after copy_fn -- or somewhere in that call chain. But that does seem
rather icky.
Alternatively copy_decl_no_change could not allocate new UIDs?
Anyway, hope that helps.
For reference, the difference happens with a call to finish_return_stmt at
parser.c:11808 when input_location == 17095968. We eventually end up in
cxx_eval_call_expression where the call:
constexpr_call **slot
= constexpr_call_table->find_slot (&new_call, INSERT);
(line 1433) finds a non-empty slot in one case and not in the other.
(constexpr_call_table is a deletable hash)
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From: "ppalka at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70590] [6 Regression] r234810 causes error: location references block not in block tree
Date: Fri, 08 Apr 2016 20:17:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70590
--- Comment #13 from Patrick Palka <ppalka at gcc dot gnu.org> ---
Author: ppalka
Date: Fri Apr 8 20:17:10 2016
New Revision: 234837
URL: https://gcc.gnu.org/viewcvs?rev=234837&root=gcc&view=rev
Log:
Fix PR c++/70590 (error: location references block not in block tree)
gcc/cp/ChangeLog:
PR c++/70590
PR c++/70452
* constexpr.c (cxx_eval_outermost_expression): Call unshare_expr
on the result if it's not a CONSTRUCTOR.
gcc/testsuite/ChangeLog:
PR c++/70590
PR c++/70452
* g++.dg/pr70590.C: New test.
* g++.dg/pr70590-2.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/pr70590-2.C
trunk/gcc/testsuite/g++.dg/pr70590.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/constexpr.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-521632-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 20:17:56 2016
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Subject: [Bug c++/70452] [5/6 Regression] Regression in C++ parsing performance between 4.9.3 and 5.3.1
Date: Fri, 08 Apr 2016 20:17:00 -0000
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--- Comment #15 from Patrick Palka <ppalka at gcc dot gnu.org> ---
Author: ppalka
Date: Fri Apr 8 20:17:10 2016
New Revision: 234837
URL: https://gcc.gnu.org/viewcvs?rev=234837&root=gcc&view=rev
Log:
Fix PR c++/70590 (error: location references block not in block tree)
gcc/cp/ChangeLog:
PR c++/70590
PR c++/70452
* constexpr.c (cxx_eval_outermost_expression): Call unshare_expr
on the result if it's not a CONSTRUCTOR.
gcc/testsuite/ChangeLog:
PR c++/70590
PR c++/70452
* g++.dg/pr70590.C: New test.
* g++.dg/pr70590-2.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/pr70590-2.C
trunk/gcc/testsuite/g++.dg/pr70590.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/constexpr.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-521633-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 20:25:23 2016
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Subject: [Bug c++/70590] [6 Regression] r234810 causes error: location references block not in block tree
Date: Fri, 08 Apr 2016 20:25:00 -0000
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Patrick Palka <ppalka at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #14 from Patrick Palka <ppalka at gcc dot gnu.org> ---
Fixed...
>From gcc-bugs-return-521634-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 20:42:37 2016
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Subject: [Bug c++/70594] [6 Regression] -fcompare-debug failure
Date: Fri, 08 Apr 2016 20:42:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jason at gcc dot gnu.org
--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Nathan Sidwell from comment #7)
> copy_node_stat allocates a new UID for decls. so despite its name
> 'copy_decl_no_change' does cause a change.
>
> That decl never escapes out of the const-expr machinery, but of cause causes
> later decls to have different numberings. (which is what we're observing).
>
> I suppose the constexpr machinery could restore the next_decl_uid (and
> perhaps others?) after copy_fn -- or somewhere in that call chain. But that
> does seem rather icky.
Yeah, that is not really the right thing.
> Alternatively copy_decl_no_change could not allocate new UIDs?
copy_fn is used solely by the constexpr stuff, so the primary question is if we
really need to duplicate any decls for those or not. Changing
copy_decl_no_change is undesirable, it is used for plenty of other cases.
But, to avoid any decl remapping one could just use another function for that,
or could abuse
id->prevent_decl_creation_for_types = true;
id->remapping_type_depth = 1;
etc. The thing is, what is copy_fn copying the fn from (constexpr function
with just parsed body, or parsed and already genericized, or parsed,
genericized and gimplified, or even after some GIMPLE optimizations) and what
undesirable effects not copying the decl might have (e.g. during GIMPLE phases
perhaps DECL_VALUE_EXPR could be set for various decls, or their alignment
could be changed, whatever other changes are done) and what exactly Patrick's
patch did (did we in the past always copy_fn just once each constexpr, but now
we do it multiple times, if we GC in between)?
>From gcc-bugs-return-521635-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 20:46:16 2016
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Subject: [Bug c++/70594] [6 Regression] -fcompare-debug failure
Date: Fri, 08 Apr 2016 20:46:00 -0000
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--- Comment #9 from Patrick Palka <ppalka at gcc dot gnu.org> ---
(In reply to Nathan Sidwell from comment #7)
> The change in debug generation causes purtabations in when GC happens.
> Such that in onecase we find a cached result, and in the other case we do
> not. When we don't we end up here:
>
> 0 allocate_decl_uid () at ../../../src/gcc/tree.c:990
> #1 0x0000000001362a01 in copy_node_stat (node=0x7ffff6093e10) at
> ../../../src/gcc/tree.c:1157
> #2 0x00000000010f1a97 in copy_decl_no_change (decl=0x7ffff6093e10,
> id=0x7fffffffb120) at ../../../src/gcc/tree-inline.c:5444
> #3 0x00000000010e0ebe in remap_decl (decl=0x7ffff6093e10,
> id=0x7fffffffb120) at ../../../src/gcc/tree-inline.c:357
> #4 0x00000000010f45fe in copy_fn (fn=0x7ffff6168c40, parms=@0x7ffff6683a28:
> 0x0, result=@0x7ffff6683a30: 0xafafafafafafafaf)
> at ../../../src/gcc/tree-inline.c:6148
> #5 0x00000000009ec170 in get_fundef_copy (fun=0x7ffff6168c40) at
> ../../../src/gcc/cp/constexpr.c:1021
>
> copy_node_stat allocates a new UID for decls. so despite its name
> 'copy_decl_no_change' does cause a change.
>
> That decl never escapes out of the const-expr machinery, but of cause causes
> later decls to have different numberings. (which is what we're observing).
>
> I suppose the constexpr machinery could restore the next_decl_uid (and
> perhaps others?) after copy_fn -- or somewhere in that call chain. But that
> does seem rather icky.
>
> Alternatively copy_decl_no_change could not allocate new UIDs?
The decls belonging to a copy of a function must have new UIDs though because
their uids are used to track their mutable values (within the
constexpr_ctx::values hash_map). So if the decls of two copies of the same
function didn't have different uids then e.g. recursive function calls wouldn't
get evaluated properly.
>
> Anyway, hope that helps.
>
> For reference, the difference happens with a call to finish_return_stmt at
> parser.c:11808 when input_location == 17095968. We eventually end up in
> cxx_eval_call_expression where the call:
> constexpr_call **slot
> = constexpr_call_table->find_slot (&new_call, INSERT);
> (line 1433) finds a non-empty slot in one case and not in the other.
> (constexpr_call_table is a deletable hash)
>From gcc-bugs-return-521636-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 20:56:47 2016
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From: "nuclearlee at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/70605] New: allocatable character scalar in type empty after assign
Date: Fri, 08 Apr 2016 20:56:00 -0000
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Bug ID: 70605
Summary: allocatable character scalar in type empty after
assign
Product: gcc
Version: 5.3.0
Status: UNCONFIRMED
Severity: critical
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: nuclearlee at gmail dot com
Target Milestone: ---
Created attachment 38228
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38228&action=edit
Testcode containing a program containing a subroutine that accepts a variable
length character and an string (in) as an allocatable scalar (inout)
I've found that if I pass an allocatable scalar character string
(character(len=:), allocatable :: string) that is contained in a type to a
subroutine, allocate it in the subroutine, set it, it is passed back as
allocated, but it is empty. If I pass an allocatable scalar character to the
same subroutine, but it is not in a type, the return is as expected.
The test code I'm attaching contains a subroutine that concatenates an input
string to an allocatable scalar character, and returns the concatenated string.
I've tested in windows (from equation.com) and ubuntu with gfotran 4.8, 4.9 and
5.3, and all return the same empty string for the allocatable scalar in a type.
I've also compiled it with ifort 16 (just checking to see if something compiles
it correctly), and it returns correctly for both situations.
In ubuntu compiled with the command
gfortran-5 -std=f2008 -o call_test call_test.f90
and the results I get from the gcc 5.3:
~/testcode$ ./call_test_f.exe
string_in, string_cat_with_comma result: hello, hello
added hello to get
str_len1, strlen2, tot_len: 7 0 8
string_in, string_cat_with_comma result: goodbye, ,goodbye
added goodbye to get
str_len1, strlen2, tot_len: 8 0 9
string_in, string_cat_with_comma result: waithere, ,waithere
added waithere to get
**********
string_in, string_cat_with_comma result: hello, hello
added hello to get hello
str_len1, strlen2, tot_len: 7 5 13
string_in, string_cat_with_comma result: goodbye, hello,goodbye
added goodbye to get hello,goodbye
str_len1, strlen2, tot_len: 8 13 22
string_in, string_cat_with_comma result: waithere, hello,goodbye,waithere
added waithere to get hello,goodbye,waithere
>From gcc-bugs-return-521637-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 20:58:57 2016
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Subject: [Bug c++/70594] [6 Regression] -fcompare-debug failure
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--- Comment #10 from Patrick Palka <ppalka at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #8)
> (In reply to Nathan Sidwell from comment #7)
> > copy_node_stat allocates a new UID for decls. so despite its name
> > 'copy_decl_no_change' does cause a change.
> >
> > That decl never escapes out of the const-expr machinery, but of cause causes
> > later decls to have different numberings. (which is what we're observing).
> >
> > I suppose the constexpr machinery could restore the next_decl_uid (and
> > perhaps others?) after copy_fn -- or somewhere in that call chain. But that
> > does seem rather icky.
>
> Yeah, that is not really the right thing.
>
> > Alternatively copy_decl_no_change could not allocate new UIDs?
>
> copy_fn is used solely by the constexpr stuff, so the primary question is if
> we really need to duplicate any decls for those or not. Changing
> copy_decl_no_change is undesirable, it is used for plenty of other cases.
> But, to avoid any decl remapping one could just use another function for
> that, or could abuse
> id->prevent_decl_creation_for_types = true;
> id->remapping_type_depth = 1;
> etc. The thing is, what is copy_fn copying the fn from (constexpr function
> with just parsed body, or parsed and already genericized, or parsed,
> genericized and gimplified, or even after some GIMPLE optimizations) and
Looks like it's copying the fn after it's been parsed and genericized.
> what undesirable effects not copying the decl might have (e.g. during GIMPLE
> phases perhaps DECL_VALUE_EXPR could be set for various decls, or their
> alignment could be changed, whatever other changes are done) and what
> exactly Patrick's patch did (did we in the past always copy_fn just once
> each constexpr, but now we do it multiple times, if we GC in between)?
Before the patch the function was copied for each constexpr call that's
evaluated. After the patch the function is copied only if the freelist is
empty (in practice this means after GC or during recursive constexpr calls to
the same function).
>From gcc-bugs-return-521638-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 20:59:53 2016
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Subject: [Bug c++/70594] [6 Regression] -fcompare-debug failure
Date: Fri, 08 Apr 2016 20:59:00 -0000
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--- Comment #11 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Patrick's original patch did 2 things AFAICT
1) make constexpr_call_table GC deletable
2) add the fundef_copies_table etc.
The failure we're observing is of constexpr_call_table losing information,
which then causes the changing calls of copy_fn. Now, we'd still see that
changing behaviour without #2. But I don't think we get it without #1. The
logic in cxx_eval_call_expression is (pseudo code-ish):
entry = constexpr_call_table->find_or_insert (...)
if (entry->value)
return entry->value
fn = get_fundef_copy (...)
result = evaluate (...)
entry->value = result;
return result;
Those are the only uses of the call_table and get_fundef_copy.
So restoring constexpr_call_table to non-deletableness is the safe patch. We
still get the fundef_copy improvement.
>From gcc-bugs-return-521639-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 21:07:55 2016
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Subject: [Bug c++/70594] [6 Regression] -fcompare-debug failure
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--- Comment #12 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
(In reply to Patrick Palka from comment #9)
> The decls belonging to a copy of a function must have new UIDs though
> because their uids are used to track their mutable values (within the
> constexpr_ctx::values hash_map). So if the decls of two copies of the same
> function didn't have different uids then e.g. recursive function calls
> wouldn't get evaluated properly.
One could probably add something like DECL_CONTEXT(decl) into the hash's eq
function?
>From gcc-bugs-return-521640-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 21:09:09 2016
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Subject: [Bug c++/70594] [6 Regression] -fcompare-debug failure
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--- Comment #13 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Nathan Sidwell from comment #11)
> Patrick's original patch did 2 things AFAICT
> 1) make constexpr_call_table GC deletable
> 2) add the fundef_copies_table etc.
>
> The failure we're observing is of constexpr_call_table losing information,
> which then causes the changing calls of copy_fn. Now, we'd still see that
> changing behaviour without #2. But I don't think we get it without #1. The
> logic in cxx_eval_call_expression is (pseudo code-ish):
>
> entry = constexpr_call_table->find_or_insert (...)
> if (entry->value)
> return entry->value
>
> fn = get_fundef_copy (...)
> result = evaluate (...)
> entry->value = result;
>
> return result;
>
> Those are the only uses of the call_table and get_fundef_copy.
>
> So restoring constexpr_call_table to non-deletableness is the safe patch.
> We still get the fundef_copy improvement.
If you remove the deletableness, then I'd say it is really important to empty
the whole freelist at least at the end of parsing, so that when GIMPLE
optimizations and RTL optimizations run memory is not occupied by those
anymore.
And perhaps instead of GC use some LRU eviction from the freelist if there are
too many constexpr functions on the freelist (but it certainly shouldn't be
dependent on stuff like free memory or GC etc.), so that builds are
reproduceable. There could be some --param with some sane defaults on how many
functions in freelist can be kept.
>From gcc-bugs-return-521641-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 21:10:37 2016
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Subject: [Bug ipa/70348] [6 Regression][openacc] ICE in visit_ref_for_mod_analysis, at ipa-prop.c
Date: Fri, 08 Apr 2016 21:10:00 -0000
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--- Comment #10 from cesar at gcc dot gnu.org ---
Author: cesar
Date: Fri Apr 8 21:09:47 2016
New Revision: 234840
URL: https://gcc.gnu.org/viewcvs?rev=234840&root=gcc&view=rev
Log:
gcc/
PR lto/70289
PR ipa/70348
PR tree-optimization/70373
PR middle-end/70533
PR middle-end/70534
PR middle-end/70535
* gimplify.c (gimplify_adjust_omp_clauses): Add or adjust data
clauses for acc parallel reductions as necessary. Error on those
that are private.
* omp-low.c (scan_sharing_clauses): Don't install variables which
are used in acc parallel reductions.
(lower_rec_input_clauses): Remove dead code.
(lower_oacc_reductions): Add support for reference reductions.
(lower_reduction_clauses): Remove dead code.
(lower_omp_target): Don't remap variables appearing in acc parallel
reductions.
* tree.h (OMP_CLAUSE_MAP_IN_REDUCTION): New macro.
gcc/testsuite/
* c-c++-common/goacc/reduction-5.c: New test.
* c-c++-common/goacc/reduction-promotions.c: New test.
* gfortran.dg/goacc/reduction-3.f95: New test.
* gfortran.dg/goacc/reduction-promotions.f90: New test.
libgomp/
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-gang-np-1.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-gw-np-1.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-1.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-2.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-3.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-4.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-vector-p-1.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-vector-p-2.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-worker-p-1.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-wv-p-1.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-wv-p-2.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-wv-p-3.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-1.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-2.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-3.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-4.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/par-reduction-1.c: Add test
coverage.
* testsuite/libgomp.oacc-c-c++-common/par-reduction-2.c: Likewise.
* testsuite/libgomp.oacc-c-c++-common/parallel-dims.c: Likewise.
* testsuite/libgomp.oacc-c-c++-common/parallel-reduction.c: New test.
* testsuite/libgomp.oacc-c-c++-common/pr70289.c: New test.
* testsuite/libgomp.oacc-c-c++-common/pr70373.c: New test.
* testsuite/libgomp.oacc-c-c++-common/reduction-1.c: Add test
coverage.
* testsuite/libgomp.oacc-c-c++-common/reduction-2.c: Likewise.
* testsuite/libgomp.oacc-c-c++-common/reduction-3.c: Likewise.
* testsuite/libgomp.oacc-c-c++-common/reduction-4.c: Likewise.
* testsuite/libgomp.oacc-c-c++-common/reduction-5.c: Likewise.
* testsuite/libgomp.oacc-c-c++-common/reduction-6.c: New test.
* testsuite/libgomp.oacc-c-c++-common/reduction.h: New test.
* testsuite/libgomp.oacc-fortran/parallel-reduction.f90: New test.
* testsuite/libgomp.oacc-fortran/pr70289.f90: New test.
* testsuite/libgomp.oacc-fortran/reduction-1.f90: Add test coverage.
* testsuite/libgomp.oacc-fortran/reduction-2.f90: Likewise.
* testsuite/libgomp.oacc-fortran/reduction-3.f90: Likewise.
* testsuite/libgomp.oacc-fortran/reduction-4.f90: Likewise.
* testsuite/libgomp.oacc-fortran/reduction-5.f90: Likewise.
* testsuite/libgomp.oacc-fortran/reduction-6.f90: Likewise.
* testsuite/libgomp.oacc-fortran/reduction-7.f90: New test.
Added:
trunk/gcc/testsuite/c-c++-common/goacc/reduction-5.c
trunk/gcc/testsuite/c-c++-common/goacc/reduction-promotions.c
trunk/gcc/testsuite/gfortran.dg/goacc/reduction-3.f95
trunk/gcc/testsuite/gfortran.dg/goacc/reduction-promotions.f90
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gang-np-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gv-np-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gw-np-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-2.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-3.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-4.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-vector-p-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-vector-p-2.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-worker-p-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-wv-p-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-wv-p-2.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-wv-p-3.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-2.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-3.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-4.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/parallel-reduction.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/pr70289.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/pr70373.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-6.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction.h
trunk/libgomp/testsuite/libgomp.oacc-fortran/parallel-reduction.f90
trunk/libgomp/testsuite/libgomp.oacc-fortran/pr70289.f90
trunk/libgomp/testsuite/libgomp.oacc-fortran/reduction-7.f90
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gimplify.c
trunk/gcc/omp-low.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree.h
trunk/libgomp/ChangeLog
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/par-reduction-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/par-reduction-2.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/parallel-dims.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-2.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-3.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-4.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-5.c
trunk/libgomp/testsuite/libgomp.oacc-fortran/reduction-1.f90
trunk/libgomp/testsuite/libgomp.oacc-fortran/reduction-2.f90
trunk/libgomp/testsuite/libgomp.oacc-fortran/reduction-3.f90
trunk/libgomp/testsuite/libgomp.oacc-fortran/reduction-4.f90
trunk/libgomp/testsuite/libgomp.oacc-fortran/reduction-5.f90
trunk/libgomp/testsuite/libgomp.oacc-fortran/reduction-6.f90
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70534
--- Comment #1 from cesar at gcc dot gnu.org ---
Author: cesar
Date: Fri Apr 8 21:09:47 2016
New Revision: 234840
URL: https://gcc.gnu.org/viewcvs?rev=234840&root=gcc&view=rev
Log:
gcc/
PR lto/70289
PR ipa/70348
PR tree-optimization/70373
PR middle-end/70533
PR middle-end/70534
PR middle-end/70535
* gimplify.c (gimplify_adjust_omp_clauses): Add or adjust data
clauses for acc parallel reductions as necessary. Error on those
that are private.
* omp-low.c (scan_sharing_clauses): Don't install variables which
are used in acc parallel reductions.
(lower_rec_input_clauses): Remove dead code.
(lower_oacc_reductions): Add support for reference reductions.
(lower_reduction_clauses): Remove dead code.
(lower_omp_target): Don't remap variables appearing in acc parallel
reductions.
* tree.h (OMP_CLAUSE_MAP_IN_REDUCTION): New macro.
gcc/testsuite/
* c-c++-common/goacc/reduction-5.c: New test.
* c-c++-common/goacc/reduction-promotions.c: New test.
* gfortran.dg/goacc/reduction-3.f95: New test.
* gfortran.dg/goacc/reduction-promotions.f90: New test.
libgomp/
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-gang-np-1.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-gw-np-1.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-1.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-2.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-3.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-4.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-vector-p-1.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-vector-p-2.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-worker-p-1.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-wv-p-1.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-wv-p-2.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-wv-p-3.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-1.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-2.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-3.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-4.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/par-reduction-1.c: Add test
coverage.
* testsuite/libgomp.oacc-c-c++-common/par-reduction-2.c: Likewise.
* testsuite/libgomp.oacc-c-c++-common/parallel-dims.c: Likewise.
* testsuite/libgomp.oacc-c-c++-common/parallel-reduction.c: New test.
* testsuite/libgomp.oacc-c-c++-common/pr70289.c: New test.
* testsuite/libgomp.oacc-c-c++-common/pr70373.c: New test.
* testsuite/libgomp.oacc-c-c++-common/reduction-1.c: Add test
coverage.
* testsuite/libgomp.oacc-c-c++-common/reduction-2.c: Likewise.
* testsuite/libgomp.oacc-c-c++-common/reduction-3.c: Likewise.
* testsuite/libgomp.oacc-c-c++-common/reduction-4.c: Likewise.
* testsuite/libgomp.oacc-c-c++-common/reduction-5.c: Likewise.
* testsuite/libgomp.oacc-c-c++-common/reduction-6.c: New test.
* testsuite/libgomp.oacc-c-c++-common/reduction.h: New test.
* testsuite/libgomp.oacc-fortran/parallel-reduction.f90: New test.
* testsuite/libgomp.oacc-fortran/pr70289.f90: New test.
* testsuite/libgomp.oacc-fortran/reduction-1.f90: Add test coverage.
* testsuite/libgomp.oacc-fortran/reduction-2.f90: Likewise.
* testsuite/libgomp.oacc-fortran/reduction-3.f90: Likewise.
* testsuite/libgomp.oacc-fortran/reduction-4.f90: Likewise.
* testsuite/libgomp.oacc-fortran/reduction-5.f90: Likewise.
* testsuite/libgomp.oacc-fortran/reduction-6.f90: Likewise.
* testsuite/libgomp.oacc-fortran/reduction-7.f90: New test.
Added:
trunk/gcc/testsuite/c-c++-common/goacc/reduction-5.c
trunk/gcc/testsuite/c-c++-common/goacc/reduction-promotions.c
trunk/gcc/testsuite/gfortran.dg/goacc/reduction-3.f95
trunk/gcc/testsuite/gfortran.dg/goacc/reduction-promotions.f90
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gang-np-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gv-np-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gw-np-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-2.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-3.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-4.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-vector-p-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-vector-p-2.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-worker-p-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-wv-p-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-wv-p-2.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-wv-p-3.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-2.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-3.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-4.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/parallel-reduction.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/pr70289.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/pr70373.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-6.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction.h
trunk/libgomp/testsuite/libgomp.oacc-fortran/parallel-reduction.f90
trunk/libgomp/testsuite/libgomp.oacc-fortran/pr70289.f90
trunk/libgomp/testsuite/libgomp.oacc-fortran/reduction-7.f90
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gimplify.c
trunk/gcc/omp-low.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree.h
trunk/libgomp/ChangeLog
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/par-reduction-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/par-reduction-2.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/parallel-dims.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-2.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-3.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-4.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-5.c
trunk/libgomp/testsuite/libgomp.oacc-fortran/reduction-1.f90
trunk/libgomp/testsuite/libgomp.oacc-fortran/reduction-2.f90
trunk/libgomp/testsuite/libgomp.oacc-fortran/reduction-3.f90
trunk/libgomp/testsuite/libgomp.oacc-fortran/reduction-4.f90
trunk/libgomp/testsuite/libgomp.oacc-fortran/reduction-5.f90
trunk/libgomp/testsuite/libgomp.oacc-fortran/reduction-6.f90
>From gcc-bugs-return-521645-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 21:10:38 2016
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From: "cesar at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/70535] broken nested reductions in openacc parallel regions
Date: Fri, 08 Apr 2016 21:10:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70535
--- Comment #1 from cesar at gcc dot gnu.org ---
Author: cesar
Date: Fri Apr 8 21:09:47 2016
New Revision: 234840
URL: https://gcc.gnu.org/viewcvs?rev=234840&root=gcc&view=rev
Log:
gcc/
PR lto/70289
PR ipa/70348
PR tree-optimization/70373
PR middle-end/70533
PR middle-end/70534
PR middle-end/70535
* gimplify.c (gimplify_adjust_omp_clauses): Add or adjust data
clauses for acc parallel reductions as necessary. Error on those
that are private.
* omp-low.c (scan_sharing_clauses): Don't install variables which
are used in acc parallel reductions.
(lower_rec_input_clauses): Remove dead code.
(lower_oacc_reductions): Add support for reference reductions.
(lower_reduction_clauses): Remove dead code.
(lower_omp_target): Don't remap variables appearing in acc parallel
reductions.
* tree.h (OMP_CLAUSE_MAP_IN_REDUCTION): New macro.
gcc/testsuite/
* c-c++-common/goacc/reduction-5.c: New test.
* c-c++-common/goacc/reduction-promotions.c: New test.
* gfortran.dg/goacc/reduction-3.f95: New test.
* gfortran.dg/goacc/reduction-promotions.f90: New test.
libgomp/
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-gang-np-1.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-gw-np-1.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-1.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-2.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-3.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-4.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-vector-p-1.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-vector-p-2.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-worker-p-1.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-wv-p-1.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-wv-p-2.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-wv-p-3.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-1.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-2.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-3.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-4.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/par-reduction-1.c: Add test
coverage.
* testsuite/libgomp.oacc-c-c++-common/par-reduction-2.c: Likewise.
* testsuite/libgomp.oacc-c-c++-common/parallel-dims.c: Likewise.
* testsuite/libgomp.oacc-c-c++-common/parallel-reduction.c: New test.
* testsuite/libgomp.oacc-c-c++-common/pr70289.c: New test.
* testsuite/libgomp.oacc-c-c++-common/pr70373.c: New test.
* testsuite/libgomp.oacc-c-c++-common/reduction-1.c: Add test
coverage.
* testsuite/libgomp.oacc-c-c++-common/reduction-2.c: Likewise.
* testsuite/libgomp.oacc-c-c++-common/reduction-3.c: Likewise.
* testsuite/libgomp.oacc-c-c++-common/reduction-4.c: Likewise.
* testsuite/libgomp.oacc-c-c++-common/reduction-5.c: Likewise.
* testsuite/libgomp.oacc-c-c++-common/reduction-6.c: New test.
* testsuite/libgomp.oacc-c-c++-common/reduction.h: New test.
* testsuite/libgomp.oacc-fortran/parallel-reduction.f90: New test.
* testsuite/libgomp.oacc-fortran/pr70289.f90: New test.
* testsuite/libgomp.oacc-fortran/reduction-1.f90: Add test coverage.
* testsuite/libgomp.oacc-fortran/reduction-2.f90: Likewise.
* testsuite/libgomp.oacc-fortran/reduction-3.f90: Likewise.
* testsuite/libgomp.oacc-fortran/reduction-4.f90: Likewise.
* testsuite/libgomp.oacc-fortran/reduction-5.f90: Likewise.
* testsuite/libgomp.oacc-fortran/reduction-6.f90: Likewise.
* testsuite/libgomp.oacc-fortran/reduction-7.f90: New test.
Added:
trunk/gcc/testsuite/c-c++-common/goacc/reduction-5.c
trunk/gcc/testsuite/c-c++-common/goacc/reduction-promotions.c
trunk/gcc/testsuite/gfortran.dg/goacc/reduction-3.f95
trunk/gcc/testsuite/gfortran.dg/goacc/reduction-promotions.f90
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gang-np-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gv-np-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gw-np-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-2.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-3.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-4.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-vector-p-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-vector-p-2.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-worker-p-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-wv-p-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-wv-p-2.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-wv-p-3.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-2.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-3.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-4.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/parallel-reduction.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/pr70289.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/pr70373.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-6.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction.h
trunk/libgomp/testsuite/libgomp.oacc-fortran/parallel-reduction.f90
trunk/libgomp/testsuite/libgomp.oacc-fortran/pr70289.f90
trunk/libgomp/testsuite/libgomp.oacc-fortran/reduction-7.f90
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gimplify.c
trunk/gcc/omp-low.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree.h
trunk/libgomp/ChangeLog
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/par-reduction-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/par-reduction-2.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/parallel-dims.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-2.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-3.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-4.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-5.c
trunk/libgomp/testsuite/libgomp.oacc-fortran/reduction-1.f90
trunk/libgomp/testsuite/libgomp.oacc-fortran/reduction-2.f90
trunk/libgomp/testsuite/libgomp.oacc-fortran/reduction-3.f90
trunk/libgomp/testsuite/libgomp.oacc-fortran/reduction-4.f90
trunk/libgomp/testsuite/libgomp.oacc-fortran/reduction-5.f90
trunk/libgomp/testsuite/libgomp.oacc-fortran/reduction-6.f90
>From gcc-bugs-return-521643-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 21:10:37 2016
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From: "cesar at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/70533] reductions on reference-typed variables are broken in OpenACC
Date: Fri, 08 Apr 2016 21:10:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70533
--- Comment #1 from cesar at gcc dot gnu.org ---
Author: cesar
Date: Fri Apr 8 21:09:47 2016
New Revision: 234840
URL: https://gcc.gnu.org/viewcvs?rev=234840&root=gcc&view=rev
Log:
gcc/
PR lto/70289
PR ipa/70348
PR tree-optimization/70373
PR middle-end/70533
PR middle-end/70534
PR middle-end/70535
* gimplify.c (gimplify_adjust_omp_clauses): Add or adjust data
clauses for acc parallel reductions as necessary. Error on those
that are private.
* omp-low.c (scan_sharing_clauses): Don't install variables which
are used in acc parallel reductions.
(lower_rec_input_clauses): Remove dead code.
(lower_oacc_reductions): Add support for reference reductions.
(lower_reduction_clauses): Remove dead code.
(lower_omp_target): Don't remap variables appearing in acc parallel
reductions.
* tree.h (OMP_CLAUSE_MAP_IN_REDUCTION): New macro.
gcc/testsuite/
* c-c++-common/goacc/reduction-5.c: New test.
* c-c++-common/goacc/reduction-promotions.c: New test.
* gfortran.dg/goacc/reduction-3.f95: New test.
* gfortran.dg/goacc/reduction-promotions.f90: New test.
libgomp/
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-gang-np-1.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-gw-np-1.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-1.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-2.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-3.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-4.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-vector-p-1.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-vector-p-2.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-worker-p-1.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-wv-p-1.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-wv-p-2.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-wv-p-3.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-1.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-2.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-3.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-4.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/par-reduction-1.c: Add test
coverage.
* testsuite/libgomp.oacc-c-c++-common/par-reduction-2.c: Likewise.
* testsuite/libgomp.oacc-c-c++-common/parallel-dims.c: Likewise.
* testsuite/libgomp.oacc-c-c++-common/parallel-reduction.c: New test.
* testsuite/libgomp.oacc-c-c++-common/pr70289.c: New test.
* testsuite/libgomp.oacc-c-c++-common/pr70373.c: New test.
* testsuite/libgomp.oacc-c-c++-common/reduction-1.c: Add test
coverage.
* testsuite/libgomp.oacc-c-c++-common/reduction-2.c: Likewise.
* testsuite/libgomp.oacc-c-c++-common/reduction-3.c: Likewise.
* testsuite/libgomp.oacc-c-c++-common/reduction-4.c: Likewise.
* testsuite/libgomp.oacc-c-c++-common/reduction-5.c: Likewise.
* testsuite/libgomp.oacc-c-c++-common/reduction-6.c: New test.
* testsuite/libgomp.oacc-c-c++-common/reduction.h: New test.
* testsuite/libgomp.oacc-fortran/parallel-reduction.f90: New test.
* testsuite/libgomp.oacc-fortran/pr70289.f90: New test.
* testsuite/libgomp.oacc-fortran/reduction-1.f90: Add test coverage.
* testsuite/libgomp.oacc-fortran/reduction-2.f90: Likewise.
* testsuite/libgomp.oacc-fortran/reduction-3.f90: Likewise.
* testsuite/libgomp.oacc-fortran/reduction-4.f90: Likewise.
* testsuite/libgomp.oacc-fortran/reduction-5.f90: Likewise.
* testsuite/libgomp.oacc-fortran/reduction-6.f90: Likewise.
* testsuite/libgomp.oacc-fortran/reduction-7.f90: New test.
Added:
trunk/gcc/testsuite/c-c++-common/goacc/reduction-5.c
trunk/gcc/testsuite/c-c++-common/goacc/reduction-promotions.c
trunk/gcc/testsuite/gfortran.dg/goacc/reduction-3.f95
trunk/gcc/testsuite/gfortran.dg/goacc/reduction-promotions.f90
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gang-np-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gv-np-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gw-np-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-2.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-3.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-4.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-vector-p-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-vector-p-2.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-worker-p-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-wv-p-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-wv-p-2.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-wv-p-3.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-2.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-3.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-4.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/parallel-reduction.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/pr70289.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/pr70373.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-6.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction.h
trunk/libgomp/testsuite/libgomp.oacc-fortran/parallel-reduction.f90
trunk/libgomp/testsuite/libgomp.oacc-fortran/pr70289.f90
trunk/libgomp/testsuite/libgomp.oacc-fortran/reduction-7.f90
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gimplify.c
trunk/gcc/omp-low.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree.h
trunk/libgomp/ChangeLog
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/par-reduction-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/par-reduction-2.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/parallel-dims.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-2.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-3.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-4.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-5.c
trunk/libgomp/testsuite/libgomp.oacc-fortran/reduction-1.f90
trunk/libgomp/testsuite/libgomp.oacc-fortran/reduction-2.f90
trunk/libgomp/testsuite/libgomp.oacc-fortran/reduction-3.f90
trunk/libgomp/testsuite/libgomp.oacc-fortran/reduction-4.f90
trunk/libgomp/testsuite/libgomp.oacc-fortran/reduction-5.f90
trunk/libgomp/testsuite/libgomp.oacc-fortran/reduction-6.f90
>From gcc-bugs-return-521642-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 21:10:37 2016
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From: "cesar at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/70373] [openacc] ICE with reduction clause in set_parm_rtl, at cfgexpand.c
Date: Fri, 08 Apr 2016 21:10:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70373
--- Comment #2 from cesar at gcc dot gnu.org ---
Author: cesar
Date: Fri Apr 8 21:09:47 2016
New Revision: 234840
URL: https://gcc.gnu.org/viewcvs?rev=234840&root=gcc&view=rev
Log:
gcc/
PR lto/70289
PR ipa/70348
PR tree-optimization/70373
PR middle-end/70533
PR middle-end/70534
PR middle-end/70535
* gimplify.c (gimplify_adjust_omp_clauses): Add or adjust data
clauses for acc parallel reductions as necessary. Error on those
that are private.
* omp-low.c (scan_sharing_clauses): Don't install variables which
are used in acc parallel reductions.
(lower_rec_input_clauses): Remove dead code.
(lower_oacc_reductions): Add support for reference reductions.
(lower_reduction_clauses): Remove dead code.
(lower_omp_target): Don't remap variables appearing in acc parallel
reductions.
* tree.h (OMP_CLAUSE_MAP_IN_REDUCTION): New macro.
gcc/testsuite/
* c-c++-common/goacc/reduction-5.c: New test.
* c-c++-common/goacc/reduction-promotions.c: New test.
* gfortran.dg/goacc/reduction-3.f95: New test.
* gfortran.dg/goacc/reduction-promotions.f90: New test.
libgomp/
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-gang-np-1.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-gw-np-1.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-1.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-2.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-3.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-4.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-vector-p-1.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-vector-p-2.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-worker-p-1.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-wv-p-1.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-wv-p-2.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-wv-p-3.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-1.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-2.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-3.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-4.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/par-reduction-1.c: Add test
coverage.
* testsuite/libgomp.oacc-c-c++-common/par-reduction-2.c: Likewise.
* testsuite/libgomp.oacc-c-c++-common/parallel-dims.c: Likewise.
* testsuite/libgomp.oacc-c-c++-common/parallel-reduction.c: New test.
* testsuite/libgomp.oacc-c-c++-common/pr70289.c: New test.
* testsuite/libgomp.oacc-c-c++-common/pr70373.c: New test.
* testsuite/libgomp.oacc-c-c++-common/reduction-1.c: Add test
coverage.
* testsuite/libgomp.oacc-c-c++-common/reduction-2.c: Likewise.
* testsuite/libgomp.oacc-c-c++-common/reduction-3.c: Likewise.
* testsuite/libgomp.oacc-c-c++-common/reduction-4.c: Likewise.
* testsuite/libgomp.oacc-c-c++-common/reduction-5.c: Likewise.
* testsuite/libgomp.oacc-c-c++-common/reduction-6.c: New test.
* testsuite/libgomp.oacc-c-c++-common/reduction.h: New test.
* testsuite/libgomp.oacc-fortran/parallel-reduction.f90: New test.
* testsuite/libgomp.oacc-fortran/pr70289.f90: New test.
* testsuite/libgomp.oacc-fortran/reduction-1.f90: Add test coverage.
* testsuite/libgomp.oacc-fortran/reduction-2.f90: Likewise.
* testsuite/libgomp.oacc-fortran/reduction-3.f90: Likewise.
* testsuite/libgomp.oacc-fortran/reduction-4.f90: Likewise.
* testsuite/libgomp.oacc-fortran/reduction-5.f90: Likewise.
* testsuite/libgomp.oacc-fortran/reduction-6.f90: Likewise.
* testsuite/libgomp.oacc-fortran/reduction-7.f90: New test.
Added:
trunk/gcc/testsuite/c-c++-common/goacc/reduction-5.c
trunk/gcc/testsuite/c-c++-common/goacc/reduction-promotions.c
trunk/gcc/testsuite/gfortran.dg/goacc/reduction-3.f95
trunk/gcc/testsuite/gfortran.dg/goacc/reduction-promotions.f90
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gang-np-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gv-np-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gw-np-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-2.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-3.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-4.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-vector-p-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-vector-p-2.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-worker-p-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-wv-p-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-wv-p-2.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-wv-p-3.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-2.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-3.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-4.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/parallel-reduction.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/pr70289.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/pr70373.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-6.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction.h
trunk/libgomp/testsuite/libgomp.oacc-fortran/parallel-reduction.f90
trunk/libgomp/testsuite/libgomp.oacc-fortran/pr70289.f90
trunk/libgomp/testsuite/libgomp.oacc-fortran/reduction-7.f90
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gimplify.c
trunk/gcc/omp-low.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree.h
trunk/libgomp/ChangeLog
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/par-reduction-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/par-reduction-2.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/parallel-dims.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-2.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-3.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-4.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-5.c
trunk/libgomp/testsuite/libgomp.oacc-fortran/reduction-1.f90
trunk/libgomp/testsuite/libgomp.oacc-fortran/reduction-2.f90
trunk/libgomp/testsuite/libgomp.oacc-fortran/reduction-3.f90
trunk/libgomp/testsuite/libgomp.oacc-fortran/reduction-4.f90
trunk/libgomp/testsuite/libgomp.oacc-fortran/reduction-5.f90
trunk/libgomp/testsuite/libgomp.oacc-fortran/reduction-6.f90
>From gcc-bugs-return-521648-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 21:12:44 2016
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Subject: [Bug middle-end/70535] broken nested reductions in openacc parallel regions
Date: Fri, 08 Apr 2016 21:12:00 -0000
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cesar at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #2 from cesar at gcc dot gnu.org ---
Fixed in r234840.
>From gcc-bugs-return-521647-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 21:12:03 2016
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Subject: [Bug ipa/70348] [6 Regression][openacc] ICE in visit_ref_for_mod_analysis, at ipa-prop.c
Date: Fri, 08 Apr 2016 21:12:00 -0000
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--- Comment #11 from cesar at gcc dot gnu.org ---
Fixed in r234840.
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Subject: [Bug lto/70289] [openacc] ICE in input_varpool_node
Date: Fri, 08 Apr 2016 21:12:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70289
--- Comment #5 from cesar at gcc dot gnu.org ---
Author: cesar
Date: Fri Apr 8 21:09:47 2016
New Revision: 234840
URL: https://gcc.gnu.org/viewcvs?rev=234840&root=gcc&view=rev
Log:
gcc/
PR lto/70289
PR ipa/70348
PR tree-optimization/70373
PR middle-end/70533
PR middle-end/70534
PR middle-end/70535
* gimplify.c (gimplify_adjust_omp_clauses): Add or adjust data
clauses for acc parallel reductions as necessary. Error on those
that are private.
* omp-low.c (scan_sharing_clauses): Don't install variables which
are used in acc parallel reductions.
(lower_rec_input_clauses): Remove dead code.
(lower_oacc_reductions): Add support for reference reductions.
(lower_reduction_clauses): Remove dead code.
(lower_omp_target): Don't remap variables appearing in acc parallel
reductions.
* tree.h (OMP_CLAUSE_MAP_IN_REDUCTION): New macro.
gcc/testsuite/
* c-c++-common/goacc/reduction-5.c: New test.
* c-c++-common/goacc/reduction-promotions.c: New test.
* gfortran.dg/goacc/reduction-3.f95: New test.
* gfortran.dg/goacc/reduction-promotions.f90: New test.
libgomp/
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-gang-np-1.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-gw-np-1.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-1.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-2.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-3.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-4.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-vector-p-1.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-vector-p-2.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-worker-p-1.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-wv-p-1.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-wv-p-2.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/loop-reduction-wv-p-3.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-1.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-2.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-3.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-4.c: New
test.
* testsuite/libgomp.oacc-c-c++-common/par-reduction-1.c: Add test
coverage.
* testsuite/libgomp.oacc-c-c++-common/par-reduction-2.c: Likewise.
* testsuite/libgomp.oacc-c-c++-common/parallel-dims.c: Likewise.
* testsuite/libgomp.oacc-c-c++-common/parallel-reduction.c: New test.
* testsuite/libgomp.oacc-c-c++-common/pr70289.c: New test.
* testsuite/libgomp.oacc-c-c++-common/pr70373.c: New test.
* testsuite/libgomp.oacc-c-c++-common/reduction-1.c: Add test
coverage.
* testsuite/libgomp.oacc-c-c++-common/reduction-2.c: Likewise.
* testsuite/libgomp.oacc-c-c++-common/reduction-3.c: Likewise.
* testsuite/libgomp.oacc-c-c++-common/reduction-4.c: Likewise.
* testsuite/libgomp.oacc-c-c++-common/reduction-5.c: Likewise.
* testsuite/libgomp.oacc-c-c++-common/reduction-6.c: New test.
* testsuite/libgomp.oacc-c-c++-common/reduction.h: New test.
* testsuite/libgomp.oacc-fortran/parallel-reduction.f90: New test.
* testsuite/libgomp.oacc-fortran/pr70289.f90: New test.
* testsuite/libgomp.oacc-fortran/reduction-1.f90: Add test coverage.
* testsuite/libgomp.oacc-fortran/reduction-2.f90: Likewise.
* testsuite/libgomp.oacc-fortran/reduction-3.f90: Likewise.
* testsuite/libgomp.oacc-fortran/reduction-4.f90: Likewise.
* testsuite/libgomp.oacc-fortran/reduction-5.f90: Likewise.
* testsuite/libgomp.oacc-fortran/reduction-6.f90: Likewise.
* testsuite/libgomp.oacc-fortran/reduction-7.f90: New test.
Added:
trunk/gcc/testsuite/c-c++-common/goacc/reduction-5.c
trunk/gcc/testsuite/c-c++-common/goacc/reduction-promotions.c
trunk/gcc/testsuite/gfortran.dg/goacc/reduction-3.f95
trunk/gcc/testsuite/gfortran.dg/goacc/reduction-promotions.f90
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gang-np-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gv-np-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gw-np-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-2.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-3.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-4.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-vector-p-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-vector-p-2.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-worker-p-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-wv-p-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-wv-p-2.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-wv-p-3.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-2.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-3.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-4.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/parallel-reduction.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/pr70289.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/pr70373.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-6.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction.h
trunk/libgomp/testsuite/libgomp.oacc-fortran/parallel-reduction.f90
trunk/libgomp/testsuite/libgomp.oacc-fortran/pr70289.f90
trunk/libgomp/testsuite/libgomp.oacc-fortran/reduction-7.f90
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gimplify.c
trunk/gcc/omp-low.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree.h
trunk/libgomp/ChangeLog
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/par-reduction-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/par-reduction-2.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/parallel-dims.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-2.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-3.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-4.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-5.c
trunk/libgomp/testsuite/libgomp.oacc-fortran/reduction-1.f90
trunk/libgomp/testsuite/libgomp.oacc-fortran/reduction-2.f90
trunk/libgomp/testsuite/libgomp.oacc-fortran/reduction-3.f90
trunk/libgomp/testsuite/libgomp.oacc-fortran/reduction-4.f90
trunk/libgomp/testsuite/libgomp.oacc-fortran/reduction-5.f90
trunk/libgomp/testsuite/libgomp.oacc-fortran/reduction-6.f90
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----------------------------------------------------------------------------
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--- Comment #2 from cesar at gcc dot gnu.org ---
Fixed in r234840.
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Subject: [Bug tree-optimization/70373] [openacc] ICE with reduction clause in set_parm_rtl, at cfgexpand.c
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--- Comment #3 from cesar at gcc dot gnu.org ---
Fixed in r234840.
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Subject: [Bug lto/70289] [openacc] ICE in input_varpool_node
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--- Comment #6 from cesar at gcc dot gnu.org ---
Fixed in r234840.
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--- Comment #2 from cesar at gcc dot gnu.org ---
Fixed in r234840.
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--- Comment #5 from Andrés AgustÃn Tiraboschi <andres.tiraboschi at tallertechnologies dot com> ---
I'm going to upload a new version for dumping dependencies quickly, so please
ignore the current attachment.
>From gcc-bugs-return-521654-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 21:20:13 2016
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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Last reconfirmed| |2016-04-08
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>From gcc-bugs-return-521655-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 21:21:25 2016
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Subject: [Bug c++/68722] [4.9/5/6 Regression] internal compiler error: in merge_exception_specifiers, at cp/typeck2.c:2108
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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--- Comment #3 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Looking into it.
>From gcc-bugs-return-521656-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 21:22:42 2016
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From: "daniel.gutson at tallertechnologies dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70606] New: new warning for unicode quotes
Date: Fri, 08 Apr 2016 21:22:00 -0000
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Bug ID: 70606
Summary: new warning for unicode quotes
Product: gcc
Version: 6.0
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This issue is created from the discussion here:
https://gcc.gnu.org/ml/gcc/2016-03/msg00260.html (please note that the thread
continues in April).
Basically, we want gcc to emit a specific message when unicode quotes are used.
Somebody of us will solve this issue during next week, once we decide who, I
will add a comment so the assignee can be updated.
>From gcc-bugs-return-521657-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 21:23:28 2016
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Subject: [Bug c++/70594] [6 Regression] -fcompare-debug failure
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--- Comment #14 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #13)
> If you remove the deletableness, then I'd say it is really important to
> empty the whole freelist at least at the end of parsing, so that when GIMPLE
> optimizations and RTL optimizations run memory is not occupied by those
> anymore.
Makes sense.
> And perhaps instead of GC use some LRU eviction from the freelist if there
> are too many constexpr functions on the freelist (but it certainly shouldn't
> be dependent on stuff like free memory or GC etc.), so that builds are
> reproduceable. There could be some --param with some sane defaults on how
> many functions in freelist can be kept.
Good idea. I guess the right place is in cxx_eval_call_expression, when we
find we're inserting a new entry we should zap its current contents if it is
'too large'.
To be specific, I mean changing constexpr_call_table, which holds call
results. Not changing the fundef_copies_table, which holds lists of copied
functions and can remain GC-deletable.
>From gcc-bugs-return-521658-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 21:24:30 2016
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>From gcc-bugs-return-521659-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 21:27:54 2016
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Subject: [Bug ipa/70582] [6 regression] gcc.dg/attr-weakref-1.c FAILs
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
So in the end for Wv3a I see just:
.local lv3
.comm lv3,4,4
.set Wv3a,lv3
.local Wv3a
in there, does the order of .set and .local matter for Solaris/x86 /bin/as
(i.e. does putting .local Wv3a first help)?
I certainly don't see Wv3a being multiply defined there.
>From gcc-bugs-return-521660-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 21:33:47 2016
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Subject: [Bug tree-optimization/70577] [6 regression] tree-ssa/prefetch-5.c scan-tree-dump-times aprefetch failures
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I think -1 is the right answer, these are flexible array-like arrays,
where one could e.g.
struct tail0 *p = malloc (sizeof (struct tail0) + 131072 * sizeof (int));
initialize (p);
loop0 (131072, p);
and similarly for tail1/loop1.
>From gcc-bugs-return-521661-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 21:35:55 2016
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Subject: [Bug fortran/70605] allocatable character scalar in type empty after assign
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--- Comment #1 from kargl at gcc dot gnu.org ---
You failed to identify what you expected. I suspect what
you call correct output is
troutmask:sgk[205] ./z
string_in, string_cat_with_comma result: hello, hello
added hello to get hello
str_len1, strlen2, tot_len: 7 5 13
string_in, string_cat_with_comma result: goodbye, hello,goodbye
added goodbye to get hello,goodbye
str_len1, strlen2, tot_len: 8 13 22
string_in, string_cat_with_comma result: waithere, hello,goodbye,waithere
added waithere to get hello,goodbye,waithere
**********
string_in, string_cat_with_comma result: hello, hello
added hello to get hello
str_len1, strlen2, tot_len: 7 5 13
string_in, string_cat_with_comma result: goodbye, hello,goodbye
added goodbye to get hello,goodbye
str_len1, strlen2, tot_len: 8 13 22
string_in, string_cat_with_comma result: waithere, hello,goodbye,waithere
added waithere to get hello,goodbye,waithere
The issue appears to be fixed on trunk and in the 5-branch.
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Subject: [Bug fortran/70605] allocatable character scalar in type empty after assign
Date: Fri, 08 Apr 2016 21:36:00 -0000
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Known to work| |5.3.1, 6.0
Severity|critical |normal
>From gcc-bugs-return-521663-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 21:41:46 2016
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From: "nuclearlee at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/70605] allocatable character scalar in type empty after assign
Date: Fri, 08 Apr 2016 21:41:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70605
--- Comment #2 from Lee Harding <nuclearlee at gmail dot com> ---
You are correct with your assumption of what I expect is the correct output.
I'm new to bugzilla, and I couldn't come up with a search that could find this
issue anywhere else. Since this has been fixed already, is there something else
I should do (e.g., mark this as resolved)?
>From gcc-bugs-return-521664-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 21:50:02 2016
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From: "meissner at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70381] On powerpc, -mfloat128 is on by default for all VSX systems
Date: Fri, 08 Apr 2016 21:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70381
--- Comment #4 from Michael Meissner <meissner at gcc dot gnu.org> ---
Author: meissner
Date: Fri Apr 8 21:49:17 2016
New Revision: 234841
URL: https://gcc.gnu.org/viewcvs?rev=234841&root=gcc&view=rev
Log:
Merge in pr 70381 fix; update documentation
Modified:
branches/ibm/ieee/gcc/ChangeLog.meissner
branches/ibm/ieee/gcc/config/rs6000/rs6000.c
branches/ibm/ieee/gcc/doc/extend.texi
branches/ibm/ieee/gcc/testsuite/ChangeLog.meissner
branches/ibm/ieee/gcc/testsuite/lib/target-supports.exp
branches/ibm/ieee/libgcc/configure
branches/ibm/ieee/libgcc/configure.ac
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From: "meissner at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70381] On powerpc, -mfloat128 is on by default for all VSX systems
Date: Fri, 08 Apr 2016 21:52:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70381
--- Comment #5 from Michael Meissner <meissner at gcc dot gnu.org> ---
Author: meissner
Date: Fri Apr 8 21:51:58 2016
New Revision: 234842
URL: https://gcc.gnu.org/viewcvs?rev=234842&root=gcc&view=rev
Log:
Merge in pr 70381 fix; update documentation
Modified:
branches/ibm/ieee/libgcc/ChangeLog.meissner
>From gcc-bugs-return-521666-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 21:54:34 2016
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From: "meissner at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70381] On powerpc, -mfloat128 is on by default for all VSX systems
Date: Fri, 08 Apr 2016 21:54:00 -0000
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--- Comment #6 from Michael Meissner <meissner at gcc dot gnu.org> ---
Author: meissner
Date: Fri Apr 8 21:53:48 2016
New Revision: 234843
URL: https://gcc.gnu.org/viewcvs?rev=234843&root=gcc&view=rev
Log:
Merge in __float128 complex support; Merge in PR 70381 fix
Added:
branches/ibm/pre-gcc7/gcc/testsuite/gcc.target/powerpc/float128-1.c
(props changed)
- copied unchanged from r234838,
branches/ibm/ieee/gcc/testsuite/gcc.target/powerpc/float128-1.c
branches/ibm/pre-gcc7/gcc/testsuite/gcc.target/powerpc/float128-2.c
(props changed)
- copied unchanged from r234838,
branches/ibm/ieee/gcc/testsuite/gcc.target/powerpc/float128-2.c
branches/ibm/pre-gcc7/gcc/testsuite/gcc.target/powerpc/float128-complex-1.c
(props changed)
- copied unchanged from r234838,
branches/ibm/ieee/gcc/testsuite/gcc.target/powerpc/float128-complex-1.c
branches/ibm/pre-gcc7/gcc/testsuite/gcc.target/powerpc/float128-complex-2.c
(props changed)
- copied unchanged from r234838,
branches/ibm/ieee/gcc/testsuite/gcc.target/powerpc/float128-complex-2.c
Modified:
branches/ibm/pre-gcc7/gcc/ChangeLog.ibm
branches/ibm/pre-gcc7/gcc/config/rs6000/rs6000.c
branches/ibm/pre-gcc7/gcc/config/rs6000/rs6000.h
branches/ibm/pre-gcc7/gcc/doc/extend.texi
branches/ibm/pre-gcc7/gcc/genmodes.c
branches/ibm/pre-gcc7/gcc/machmode.h
branches/ibm/pre-gcc7/gcc/stor-layout.c
branches/ibm/pre-gcc7/gcc/testsuite/ChangeLog.ibm
branches/ibm/pre-gcc7/gcc/testsuite/lib/target-supports.exp
branches/ibm/pre-gcc7/gcc/tree.c
branches/ibm/pre-gcc7/libgcc/ChangeLog.ibm
branches/ibm/pre-gcc7/libgcc/configure
branches/ibm/pre-gcc7/libgcc/configure.ac
Propchange: branches/ibm/pre-gcc7/gcc/testsuite/gcc.target/powerpc/float128-1.c
('svn:mergeinfo' added)
Propchange: branches/ibm/pre-gcc7/gcc/testsuite/gcc.target/powerpc/float128-2.c
('svn:mergeinfo' added)
Propchange:
branches/ibm/pre-gcc7/gcc/testsuite/gcc.target/powerpc/float128-complex-1.c
('svn:mergeinfo' added)
Propchange:
branches/ibm/pre-gcc7/gcc/testsuite/gcc.target/powerpc/float128-complex-2.c
('svn:mergeinfo' added)
>From gcc-bugs-return-521667-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 21:56:34 2016
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From: "sgk at troutmask dot apl.washington.edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/70605] allocatable character scalar in type empty after assign
Date: Fri, 08 Apr 2016 21:56:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70605
--- Comment #3 from Steve Kargl <sgk at troutmask dot apl.washington.edu> ---
On Fri, Apr 08, 2016 at 09:41:33PM +0000, nuclearlee at gmail dot com wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70605
>
> --- Comment #2 from Lee Harding <nuclearlee at gmail dot com> ---
> You are correct with your assumption of what I expect is the correct
> output.
> I'm new to bugzilla, and I couldn't come up with a search that could find this
> issue anywhere else. Since this has been fixed already, is there something else
> I should do (e.g., mark this as resolved)?
>
Don't worry about it. I'll close the PR in a week or two.
We would rather have a PR submitted for an already fixed
bug than have someone not submit a PR at all.
>From gcc-bugs-return-521668-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 22:11:26 2016
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From: "graeme_ch at outlook dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug debug/70599] Crash when adding debug symbols to a program making heavy use of nested templates.
Date: Fri, 08 Apr 2016 22:11:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70599
--- Comment #3 from Graeme <graeme_ch at outlook dot com> ---
Since the issue is due to my computer running out of memory, I tried adding
some more swap space:
fallocate -l 100G extra_swap
mkswap extra_swap
sudo swapon extra_swap
Swap usage peaked at about 16.7 GB (plus 8 GB RAM on my system) then my
computer froze. It seems that either the memory requirement is growing
exponentially with some aspect of the complexity here or that there is a memory
leak.
>From gcc-bugs-return-521669-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 08 23:02:29 2016
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From: "Alexander.Voigt at desy dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/70607] New: The return type of std::conj must be std::complex<T>
Date: Fri, 08 Apr 2016 23:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70607
Bug ID: 70607
Summary: The return type of std::conj must be std::complex<T>
Product: gcc
Version: 4.9.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: Alexander.Voigt at desy dot de
Target Milestone: ---
Host: GNU/Linux x86_64
Target: GNU/Linux x86_64
Created attachment 38229
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38229&action=edit
Program which should not compile
According to the C++11 standard, all overloads of std::conj() must return a
std::complex<T>, with some type T. In libstdc++, however, there seems to exist
an overload of std::conj() which returns a scalar floating point type.
I've attached an example program, which makes use of this spurious overload. I
believe, this example program should not compile. However, it does compile
with g++ 4.9.2 on Debian GNU/Linux jessie.
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Subject: [Bug c++/36159] C++ compiler should issue a warning with missing new operator
Date: Sat, 09 Apr 2016 00:16:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mhadji at gmail dot com
--- Comment #16 from Martin Sebor <msebor at gcc dot gnu.org> ---
*** Bug 70603 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-521670-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 09 00:16:19 2016
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Subject: [Bug c++/70603] gcc alignas issue with pointers to class
Date: Sat, 09 Apr 2016 00:16:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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CC| |msebor at gcc dot gnu.org
Resolution|--- |DUPLICATE
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
C++ doesn't yet support for overaligned new expression. Please see bug 36159
for the background on the problem and the solutions under consideration
considered (the link in comment #12).
*** This bug has been marked as a duplicate of bug 36159 ***
>From gcc-bugs-return-521672-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 09 00:32:03 2016
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Subject: [Bug debug/70599] Crash when adding debug symbols to a program making heavy use of nested templates.
Date: Sat, 09 Apr 2016 00:32:00 -0000
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Ambroz Bizjak <ambrop7 at gmail dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Ambroz Bizjak <ambrop7 at gmail dot com> ---
Hi,
(I'm the author of Aprinter)
I find that with -g1 instead of -g, the compile works fine. I've managed to
refactor the code so that gcc compiles it with -g, using up to 8.5 GiB. The
resulting .elf file is 627M (with -g1 16M, without -g 437K).
It takes gdb about a minute to load the full file, and memory use of gdb grows
to gigabytes.
I suspect that the issue with -g is that gcc includes ALL types in the output,
including types used only for metaprogramming. Probably for every list like
Cons<1, Cons<2, Cons<3>>> there will be a quadratic explosion all constituent
lists are included as symbols in the output, which is very bad for non-trivial
lists.
Clang manages to compile the same thing (with -g) using 1GiB RAM and results in
a 181M .elf output.
>From gcc-bugs-return-521673-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 09 01:13:05 2016
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Subject: [Bug c++/70584] constexpr variables cannot be used as intrinsic arguments where an immediate is expected
Date: Sat, 09 Apr 2016 01:13:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-09
CC| |msebor at gcc dot gnu.org
Ever confirmed|0 |1
Known to fail| |5.3.0, 6.0
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed with the following reduced test case. The code compiles in C++ 11
mode but not in C++ 14 mode. Removing the parentheses around index also seems
to work as shown below.
$ cat t.c && /home/msebor/build/gcc-trunk-git/gcc/xgcc
-B/home/msebor/build/gcc-trunk-git/gcc -S -Wall -Wextra -Wpedantic -m32 -maes
-xc++ t.ctypedef long long __m128i __attribute__ ((__vector_size__ (16),
__may_alias__));
int main()
{
constexpr char index = 1;
__m128i r = { };
r = __builtin_ia32_aeskeygenassist128 (r, (int)index);
r = __builtin_ia32_aeskeygenassist128 (r, (int)(index));
}
t.c: In function ‘int main()’:
t.c:10:60: error: the last argument must be an 8-bit immediate
r = __builtin_ia32_aeskeygenassist128 (r, (int)(index));
^
>From gcc-bugs-return-521674-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 09 02:13:01 2016
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From: "ppalka at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70594] [6 Regression] -fcompare-debug failure
Date: Sat, 09 Apr 2016 02:13:00 -0000
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--- Comment #15 from Patrick Palka <ppalka at gcc dot gnu.org> ---
I tried building latest gcc with BOOT_CFLAGS="-O2 -fcompare-debug" and the
build fails with an -fcompare-debug error while compiling dwarf2out.c. The
failure doesn't go away if I make the constexpr_call_table non-deletable
either. However, if I "disable" the fundef_copies_table with the following
patch as well then the failure goes away. Like in Tobias' case, passing
-save-temps to the compiler makes the failure mysteriously go away too.
diff --git a/gcc/cp/constexpr.c b/gcc/cp/constexpr.c
index d84377b..234b09c 100644
--- a/gcc/cp/constexpr.c
+++ b/gcc/cp/constexpr.c
@@ -915,7 +915,7 @@ struct constexpr_ctx {
/* A table of all constexpr calls that have been evaluated by the
compiler in this translation unit. */
-static GTY ((deletable)) hash_table<constexpr_call_hasher>
*constexpr_call_table;
+static GTY (()) hash_table<constexpr_call_hasher> *constexpr_call_table;
static tree cxx_eval_constant_expression (const constexpr_ctx *, tree,
bool, bool *, bool *, tree * = NULL);
@@ -1012,7 +1012,7 @@ get_fundef_copy (tree fun)
fundef_copy *copy;
fundef_copy **slot = &fundef_copies_table.map->get_or_insert (fun, NULL);
- if (*slot == NULL)
+ if (1)
{
copy = ggc_alloc<fundef_copy> ();
copy->body = copy_fn (fun, copy->parms, copy->res);
So it looks like marking constexpr_call_table as non-deletable is not
sufficient.
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Subject: [Bug target/67391] [SH] Convert clrt addc to normal add insn
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--- Comment #36 from Oleg Endo <olegendo at gcc dot gnu.org> ---
Author: olegendo
Date: Sat Apr 9 02:46:50 2016
New Revision: 234847
URL: https://gcc.gnu.org/viewcvs?rev=234847&root=gcc&view=rev
Log:
gcc/
Backport from mainline
2016-04-03 Oleg Endo <olegendo@gcc.gnu.org>
PR target/70416
PR target/67391
* config/sh/sh.md (*addsi3): Allow pattern when reload_in_progress is
set, but not for SP_REG operands.
gcc/testsuite/
Backport from mainline
2016-04-03 Oleg Endo <olegendo@gcc.gnu.org>
PR target/70416
PR target/67391
* gcc.target/sh/torture/pr70416.c: New.
Added:
branches/gcc-5-branch/gcc/testsuite/gcc.target/sh/torture/pr70416.c
Modified:
branches/gcc-5-branch/gcc/ChangeLog
branches/gcc-5-branch/gcc/config/sh/sh.md
branches/gcc-5-branch/gcc/testsuite/ChangeLog
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Subject: [Bug target/70416] [SH]: error: 'asm' operand requires impossible reload when building ruby2.3
Date: Sat, 09 Apr 2016 02:47:00 -0000
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--- Comment #27 from Oleg Endo <olegendo at gcc dot gnu.org> ---
Author: olegendo
Date: Sat Apr 9 02:46:50 2016
New Revision: 234847
URL: https://gcc.gnu.org/viewcvs?rev=234847&root=gcc&view=rev
Log:
gcc/
Backport from mainline
2016-04-03 Oleg Endo <olegendo@gcc.gnu.org>
PR target/70416
PR target/67391
* config/sh/sh.md (*addsi3): Allow pattern when reload_in_progress is
set, but not for SP_REG operands.
gcc/testsuite/
Backport from mainline
2016-04-03 Oleg Endo <olegendo@gcc.gnu.org>
PR target/70416
PR target/67391
* gcc.target/sh/torture/pr70416.c: New.
Added:
branches/gcc-5-branch/gcc/testsuite/gcc.target/sh/torture/pr70416.c
Modified:
branches/gcc-5-branch/gcc/ChangeLog
branches/gcc-5-branch/gcc/config/sh/sh.md
branches/gcc-5-branch/gcc/testsuite/ChangeLog
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Subject: [Bug target/70416] [SH]: error: 'asm' operand requires impossible reload when building ruby2.3
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--- Comment #28 from Oleg Endo <olegendo at gcc dot gnu.org> ---
Fixed for GCC 6 and GCC 5.
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From: "olegendo at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/67391] [SH] Convert clrt addc to normal add insn
Date: Sat, 09 Apr 2016 02:49:00 -0000
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Oleg Endo <olegendo at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
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--- Comment #37 from Oleg Endo <olegendo at gcc dot gnu.org> ---
I think this can be closed now.
>From gcc-bugs-return-521679-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 09 02:50:43 2016
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Subject: [Bug target/70416] [SH]: error: 'asm' operand requires impossible reload when building ruby2.3
Date: Sat, 09 Apr 2016 02:50:00 -0000
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Oleg Endo <olegendo at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #29 from Oleg Endo <olegendo at gcc dot gnu.org> ---
.
>From gcc-bugs-return-521680-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 09 03:05:14 2016
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From: "ppalka at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70594] [6 Regression] -fcompare-debug failure
Date: Sat, 09 Apr 2016 03:05:00 -0000
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--- Comment #16 from Patrick Palka <ppalka at gcc dot gnu.org> ---
Success, compiling dwarf2out.c with "-O2 -fcompare-debug --param
ggc-min-expand=3 --param ggc-min-heapsize=3 -save-temps" managed to trigger the
compare-debug failure while leaving behind a bunch of temp files. The diff
between the two .gkd outputs is not interesting though, essentially
s/switches$D97401$m_vec/switches$D97386$m_vec/g.
>From gcc-bugs-return-521681-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 09 06:10:20 2016
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Subject: [Bug libstdc++/70607] The return type of std::conj must be std::complex<T>
Date: Sat, 09 Apr 2016 06:10:00 -0000
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--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
http://www.open-std.org/jtc1/sc22/wg21/docs/lwg-defects.html#1137
>From gcc-bugs-return-521682-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 09 06:13:14 2016
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From: "ro at CeBiTec dot Uni-Bielefeld.DE" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/68945] enable libcilkrts on SPARC
Date: Sat, 09 Apr 2016 06:13:00 -0000
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--- Comment #8 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> --- Comment #7 from Stefan Teleman <stefan.teleman at oracle dot com> ---
>> Since Stefan hasn't followed up and I'm currently looking at other
>> libcilkrts issues anyway, I'm taking over from here.
>
> Had every intention to follow-up with a cleaned-up patch, but did not find
> the time to re-do the patch.
No worries: I'm familiar both with the gcc build system and the
testsuite, so the changes fell out naturally.
> I will look into the SIGBUS crashes on SPARC64 and see what i come up
> with.
Great: one of should be able to figure out what's going on.
Rainer
>From gcc-bugs-return-521683-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 09 07:14:29 2016
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Subject: [Bug tree-optimization/68953] [6 Regression] [graphite] Wrong code w/ -O[12] -floop-nest-optimize
Date: Sat, 09 Apr 2016 07:14:00 -0000
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vries at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|unassigned at gcc dot gnu.org |vries at gcc dot gnu.org
--- Comment #8 from vries at gcc dot gnu.org ---
stage1 approved: https://gcc.gnu.org/ml/gcc-patches/2016-04/msg00430.html
>From gcc-bugs-return-521684-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 09 07:25:39 2016
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Subject: [Bug c++/70608] New: Braced initializer in default argument misses friendship
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Bug ID: 70608
Summary: Braced initializer in default argument misses
friendship
Product: gcc
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A braced-init-list in a default function argument does not receive friendship
as it should.
class A {
A() {}
friend int ok(A);
friend int f(A);
friend int g(A);
};
int ok(A = A()); // OK.
int f(A = {}); // Error. Should be same as previous.
int g(A (&&)[1] = { A() }); // Error.
>From gcc-bugs-return-521685-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 09 07:26:51 2016
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Subject: [Bug fortran/70598] Fortran OpenACC host_data construct ICE
Date: Sat, 09 Apr 2016 07:26:00 -0000
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vries at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |vries at gcc dot gnu.org
--- Comment #1 from vries at gcc dot gnu.org ---
On trunk, for -m64, we have XFAIL/UNRESOLVED:
...
XFAIL: libgomp.oacc-fortran/host_data-1.f90 -DACC_DEVICE_TYPE_host=1
-DACC_MEM_SHARED=1 -foffload=disable -O0 (internal compiler error)
XFAIL: libgomp.oacc-fortran/host_data-1.f90 -DACC_DEVICE_TYPE_host=1
-DACC_MEM_SHARED=1 -foffload=disable -O0 (test for excess errors)
UNRESOLVED: libgomp.oacc-fortran/host_data-1.f90 -DACC_DEVICE_TYPE_host=1
-DACC_MEM_SHARED=1 -foffload=disable -O0 compilation failed to produce
executa
ble
XFAIL: libgomp.oacc-fortran/host_data-1.f90 -DACC_DEVICE_TYPE_host=1
-DACC_MEM_SHARED=1 -foffload=disable -O1 (internal compiler error)
XFAIL: libgomp.oacc-fortran/host_data-1.f90 -DACC_DEVICE_TYPE_host=1
-DACC_MEM_SHARED=1 -foffload=disable -O1 (test for excess errors)
UNRESOLVED: libgomp.oacc-fortran/host_data-1.f90 -DACC_DEVICE_TYPE_host=1
-DACC_MEM_SHARED=1 -foffload=disable -O1 compilation failed to produce
executa
ble
XFAIL: libgomp.oacc-fortran/host_data-1.f90 -DACC_DEVICE_TYPE_host=1
-DACC_MEM_SHARED=1 -foffload=disable -O2 (internal compiler error)
XFAIL: libgomp.oacc-fortran/host_data-1.f90 -DACC_DEVICE_TYPE_host=1
-DACC_MEM_SHARED=1 -foffload=disable -O2 (test for excess errors)
UNRESOLVED: libgomp.oacc-fortran/host_data-1.f90 -DACC_DEVICE_TYPE_host=1
-DACC_MEM_SHARED=1 -foffload=disable -O2 compilation failed to produce
executa
ble
XFAIL: libgomp.oacc-fortran/host_data-1.f90 -DACC_DEVICE_TYPE_host=1
-DACC_MEM_SHARED=1 -foffload=disable -O3 -fomit-frame-pointer -funroll-loops
-fpeel-loops -ftracer -finline-functions (internal compiler error)
XFAIL: libgomp.oacc-fortran/host_data-1.f90 -DACC_DEVICE_TYPE_host=1
-DACC_MEM_SHARED=1 -foffload=disable -O3 -fomit-frame-pointer -funroll-loops
-fpeel-loops -ftracer -finline-functions (test for excess errors)
UNRESOLVED: libgomp.oacc-fortran/host_data-1.f90 -DACC_DEVICE_TYPE_host=1
-DACC_MEM_SHARED=1 -foffload=disable -O3 -fomit-frame-pointer -funroll-loops
-f
peel-loops -ftracer -finline-functions compilation failed to produce
executable
XFAIL: libgomp.oacc-fortran/host_data-1.f90 -DACC_DEVICE_TYPE_host=1
-DACC_MEM_SHARED=1 -foffload=disable -O3 -g (internal compiler error)
XFAIL: libgomp.oacc-fortran/host_data-1.f90 -DACC_DEVICE_TYPE_host=1
-DACC_MEM_SHARED=1 -foffload=disable -O3 -g (test for excess errors)
UNRESOLVED: libgomp.oacc-fortran/host_data-1.f90 -DACC_DEVICE_TYPE_host=1
-DACC_MEM_SHARED=1 -foffload=disable -O3 -g compilation failed to produce
exec
utable
XFAIL: libgomp.oacc-fortran/host_data-1.f90 -DACC_DEVICE_TYPE_host=1
-DACC_MEM_SHARED=1 -foffload=disable -Os (internal compiler error)
XFAIL: libgomp.oacc-fortran/host_data-1.f90 -DACC_DEVICE_TYPE_host=1
-DACC_MEM_SHARED=1 -foffload=disable -Os (test for excess errors)
UNRESOLVED: libgomp.oacc-fortran/host_data-1.f90 -DACC_DEVICE_TYPE_host=1
-DACC_MEM_SHARED=1 -foffload=disable -Os compilation failed to produce
executa
ble
...
But for -m32, we have XPASS/FAIL:
...
XPASS: libgomp.oacc-fortran/host_data-1.f90 -DACC_DEVICE_TYPE_host=1
-DACC_MEM_SHARED=1 -foffload=disable -O0 (test for excess errors)
FAIL: libgomp.oacc-fortran/host_data-1.f90 -DACC_DEVICE_TYPE_host=1
-DACC_MEM_SHARED=1 -foffload=disable -O0 execution test
XPASS: libgomp.oacc-fortran/host_data-1.f90 -DACC_DEVICE_TYPE_host=1
-DACC_MEM_SHARED=1 -foffload=disable -O1 (test for excess errors)
FAIL: libgomp.oacc-fortran/host_data-1.f90 -DACC_DEVICE_TYPE_host=1
-DACC_MEM_SHARED=1 -foffload=disable -O1 execution test
XPASS: libgomp.oacc-fortran/host_data-1.f90 -DACC_DEVICE_TYPE_host=1
-DACC_MEM_SHARED=1 -foffload=disable -O2 (test for excess errors)
FAIL: libgomp.oacc-fortran/host_data-1.f90 -DACC_DEVICE_TYPE_host=1
-DACC_MEM_SHARED=1 -foffload=disable -O2 execution test
XPASS: libgomp.oacc-fortran/host_data-1.f90 -DACC_DEVICE_TYPE_host=1
-DACC_MEM_SHARED=1 -foffload=disable -O3 -fomit-frame-pointer -funroll-loops
-fpeel-loops -ftracer -finline-functions (test for excess errors)
FAIL: libgomp.oacc-fortran/host_data-1.f90 -DACC_DEVICE_TYPE_host=1
-DACC_MEM_SHARED=1 -foffload=disable -O3 -fomit-frame-pointer -funroll-loops
-fpeel-loops -ftracer -finline-functions execution test
XPASS: libgomp.oacc-fortran/host_data-1.f90 -DACC_DEVICE_TYPE_host=1
-DACC_MEM_SHARED=1 -foffload=disable -O3 -g (test for excess errors)
FAIL: libgomp.oacc-fortran/host_data-1.f90 -DACC_DEVICE_TYPE_host=1
-DACC_MEM_SHARED=1 -foffload=disable -O3 -g execution test
XPASS: libgomp.oacc-fortran/host_data-1.f90 -DACC_DEVICE_TYPE_host=1
-DACC_MEM_SHARED=1 -foffload=disable -Os (test for excess errors)
FAIL: libgomp.oacc-fortran/host_data-1.f90 -DACC_DEVICE_TYPE_host=1
-DACC_MEM_SHARED=1 -foffload=disable -Os execution test
...
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Subject: [Bug fortran/70598] Fortran OpenACC host_data construct ICE
Date: Sat, 09 Apr 2016 07:28:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70598
--- Comment #2 from vries at gcc dot gnu.org ---
(In reply to vries from comment #1)
> On trunk
Sorry, that should have been gomp-4_0-branch
>From gcc-bugs-return-521687-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 09 08:00:37 2016
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From: "david.abdurachmanov at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/21802] Two-stage name lookup fails for operators
Date: Sat, 09 Apr 2016 08:00:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=21802
David Abdurachmanov <david.abdurachmanov at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |david.abdurachmanov at gmail dot c
| |om
--- Comment #8 from David Abdurachmanov <david.abdurachmanov at gmail dot com> ---
While looking at the last compilation issues while reg testing GCC 6.0.0, I
bumped into this one. The code compiles file with GCC 5.3.0. The code compiles
fine with Clang 3.7.0 (have not checked 3.8.0 or ICC yet, but can be done on
request).
git bisect pointed me to this fix (full bisect log is below).
d175f0193ed47b61eafd213ca2d3dde73f8f5996 is the first bad commit
commit d175f0193ed47b61eafd213ca2d3dde73f8f5996
Author: ppalka <ppalka@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Tue Dec 15 03:33:53 2015 +0000
Fix PR c++/21802 (two-stage name lookup fails for operators)
Failing file (pre-processed) is attached and I am running C-Reduce to get
something more minimal. I am currently not sure if this a compiler issue or not
thus not creating a separate BZ item.
### COMPILE LINE ###
c++ -c -ansi -fPIC -O2 Algorithm.ii
Removing -ansi seems to solve compilation issue.
### ERROR ###
Algorithm.cc: In instantiation of 'Algorithm::grammar<Iterator>::grammar()
[with Iterator = __gnu_cxx::__normal_iterator<const char*,
std::basic_string<char> >]':
Algorithm.cc:119:11: required from here
Algorithm.cc:76:16: error: invalid initialization of non-const reference of
type 'boost::proto::exprns_::expr<boost::proto::tagns_::tag::terminal,
boost::proto::argsns_::term<boost::spirit::terminal_ex<boost::spirit::tag::char_code<boost::spirit::tag::char_,
boost::spirit::char_encoding::standard>, boost::fusion::vector1<const char
(&)[19]> > >, 0l>&' from an rvalue of type
'boost::spirit::terminal<boost::spirit::tag::char_code<boost::spirit::tag::char_,
boost::spirit::char_encoding::standard> >::result<char [19],
boost::spirit::unused_type, boost::spirit::unused_type>::type {aka
boost::proto::exprns_::expr<boost::proto::tagns_::tag::terminal,
boost::proto::argsns_::term<boost::spirit::terminal_ex<boost::spirit::tag::char_code<boost::spirit::tag::char_,
boost::spirit::char_encoding::standard>, boost::fusion::vector1<const char
(&)[19]> > >, 0l>}'
= lexeme[+char_("a-zA-Z0-9{}[],_.+-")]
^~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from
/home/david.abdurachmanov/gcc600/test/fc22_ppc64le_gcc600/external/boost/1.57.0/include/boost/proto/core.hpp:26:0,
from
/home/david.abdurachmanov/gcc600/test/fc22_ppc64le_gcc600/external/boost/1.57.0/include/boost/proto/proto.hpp:12,
from
/home/david.abdurachmanov/gcc600/test/fc22_ppc64le_gcc600/external/boost/1.57.0/include/boost/spirit/home/support/meta_compiler.hpp:19,
from
/home/david.abdurachmanov/gcc600/test/fc22_ppc64le_gcc600/external/boost/1.57.0/include/boost/spirit/home/qi/meta_compiler.hpp:14,
from
/home/david.abdurachmanov/gcc600/test/fc22_ppc64le_gcc600/external/boost/1.57.0/include/boost/spirit/home/qi/action/action.hpp:14,
from
/home/david.abdurachmanov/gcc600/test/fc22_ppc64le_gcc600/external/boost/1.57.0/include/boost/spirit/home/qi/action.hpp:14,
from
/home/david.abdurachmanov/gcc600/test/fc22_ppc64le_gcc600/external/boost/1.57.0/include/boost/spirit/home/qi.hpp:14,
from
/home/david.abdurachmanov/gcc600/test/fc22_ppc64le_gcc600/external/boost/1.57.0/include/boost/spirit/include/qi.hpp:16,
from Algorithm.cc:7:
/home/david.abdurachmanov/gcc600/test/fc22_ppc64le_gcc600/external/boost/1.57.0/include/boost/proto/operators.hpp:116:5:
note: initializing argument 1 of 'const typename
boost::proto::detail::enable_unary<boost::proto::domainns_::deduce_domain,
boost::proto::detail::not_a_grammar, boost::proto::is_extension<Arg>,
boost::proto::tagns_::tag::unary_plus, Arg&>::type
boost::proto::exprns_::operator+(Arg&) [with Arg =
boost::proto::exprns_::expr<boost::proto::tagns_::tag::terminal,
boost::proto::argsns_::term<boost::spirit::terminal_ex<boost::spirit::tag::char_code<boost::spirit::tag::char_,
boost::spirit::char_encoding::standard>, boost::fusion::vector1<const char
(&)[19]> > >, 0l>; typename
boost::proto::detail::enable_unary<boost::proto::domainns_::deduce_domain,
boost::proto::detail::not_a_grammar, boost::proto::is_extension<Arg>,
boost::proto::tagns_::tag::unary_plus, Arg&>::type =
boost::proto::exprns_::expr<boost::proto::tagns_::tag::unary_plus,
boost::proto::argsns_::list1<boost::proto::exprns_::expr<boost::proto::tagns_::tag::terminal,
boost::proto::argsns_::term<boost::spirit::terminal_ex<boost::spirit::tag::char_code<boost::spirit::tag::char_,
boost::spirit::char_encoding::standard>, boost::fusion::vector1<const char
(&)[19]> > >, 0l>&>, 1l>]'
operator OP(Arg &arg BOOST_PROTO_UNARY_OP_IS_POSTFIX_ ## POST)
\
^
/home/david.abdurachmanov/gcc600/test/fc22_ppc64le_gcc600/external/boost/1.57.0/include/boost/proto/operators.hpp:236:5:
note: in expansion of macro 'BOOST_PROTO_DEFINE_UNARY_OPERATOR'
BOOST_PROTO_DEFINE_UNARY_OPERATOR(+, boost::proto::tag::unary_plus, TRAIT,
DOMAIN, 0) \
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/david.abdurachmanov/gcc600/test/fc22_ppc64le_gcc600/external/boost/1.57.0/include/boost/proto/operators.hpp:295:9:
note: in expansion of macro 'BOOST_PROTO_DEFINE_OPERATORS'
BOOST_PROTO_DEFINE_OPERATORS(is_extension, deduce_domain)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~
### BISECT LOG ###
git bisect start
# good: [c05c1b41d370b14bc94421f138d13e76831253d1] [5/n] Fix minor SSA_NAME
leaks
git bisect good c05c1b41d370b14bc94421f138d13e76831253d1
# bad: [078970398ca084fe81435464b0434dcdd4a56fc7] Daily bump.
git bisect bad 078970398ca084fe81435464b0434dcdd4a56fc7
# bad: [141d7d6e93a44d509f0be246231b46939e728c97] 2015-12-16 Richard Biener
<rguenther@suse.de>
git bisect bad 141d7d6e93a44d509f0be246231b46939e728c97
# good: [296008a9d4e2305dbf691ffcae802abcb0fe29a9] missed error format change
in previous commit
git bisect good 296008a9d4e2305dbf691ffcae802abcb0fe29a9
# good: [5a9e96d29263540947275d331b2b3efc0b0b4536] [AArch64] Add builtins for
ARMv8.1 Adv.SIMD instructions.
git bisect good 5a9e96d29263540947275d331b2b3efc0b0b4536
# good: [5112baa282300206972a4b3993f93c1847d24b6a] PR ada/49944 *
s-osinte-freebsd.ads: Minor reformatting. (Stack_Base_Available): Correct
comments. * s-osinte-kfreebsd-gnu.ads (Time_Slice_Supported, nanosleep,
clock_id_t, clock_gettime, Stack_Base_Available, Get_Page_Size, mprotect,
pthread_mutexattr_setprotocol,pthread_mutexattr_getprotocol
pthread_mutexattr_setprioceiling, pthread_mutexattr_getprioceiling,
pthread_attr_setscope, pthread_attr_getscope, pthread_attr_setinheritsched,
pthread_attr_getinheritsched, Time_Slice_Supported): Copy from
s-osinte-freebsd.ads. * gcc-interface/Makefile.in (x86/kfreebsd): Use the
POSIX version of the System.Task_Primitives.Operations package.
git bisect good 5112baa282300206972a4b3993f93c1847d24b6a
# good: [c34c9fe941f64f9597535bab54a77789a28ed368] [install.texi] Add note
against GNAT 4.8 on ARM targets
git bisect good c34c9fe941f64f9597535bab54a77789a28ed368
# good: [d9102cbe7b9f5d81fcb2266709bc3c2377e255df] 2014-12-12 Tobias Burnus
<burnus@net-b.de>
git bisect good d9102cbe7b9f5d81fcb2266709bc3c2377e255df
# good: [be5e9c7f19faf226f62f16cc7c06789962c05291] Dump default defs for
arguments, static chain and decl-by-reference
git bisect good be5e9c7f19faf226f62f16cc7c06789962c05291
# bad: [8f46e324136bff10a7a7d66fda9c094b29f99673] * config/nvptx/nvptx.h
(HARD_REGNO_NREGS): Reformat. (CANNOT_CHANGE_MODE_CLASS): Always return
true. (HARD_REGNO_MODE_OK): Reformat. * config/nvptx/nvptx.md
(define_expand mov<mode>): No RETURN_REGNUM handling here. *
config/nvptx/nvptx.c (nvptx_function_value): Set ret_reg_mode here.
(write_one_arg): No QI or HI mode args. (write_fn_proto_from_insn): No
argument promotion here. (nvptx_output_return_insn): No return
promotion here. (nvptx_output_mov_insn): No RETURN_REGNUM handling needed.
(nvptx_output_call_insn): No return promotion here.
git bisect bad 8f46e324136bff10a7a7d66fda9c094b29f99673
# bad: [d175f0193ed47b61eafd213ca2d3dde73f8f5996] Fix PR c++/21802 (two-stage
name lookup fails for operators)
git bisect bad d175f0193ed47b61eafd213ca2d3dde73f8f5996
# good: [47e60890a8042ba8ff986955f04063a432220e9e] 2015-12-14 Steve Ellcey
<sellcey@imgtec.com>
git bisect good 47e60890a8042ba8ff986955f04063a432220e9e
# good: [fe1d8e2fd875cf337d74ff4d25522efe7b715d63] Daily bump.
git bisect good fe1d8e2fd875cf337d74ff4d25522efe7b715d63
# good: [96c393ed7040fb066d7a94c5a87d869586c4ae55] 2015-12-14 Jerry DeLisle
<jvdelisle@gcc.gnu.org>
git bisect good 96c393ed7040fb066d7a94c5a87d869586c4ae55
>From gcc-bugs-return-521688-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 09 08:01:12 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/21802] Two-stage name lookup fails for operators
Date: Sat, 09 Apr 2016 08:01:00 -0000
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--- Comment #9 from David Abdurachmanov <david.abdurachmanov at gmail dot com> ---
Created attachment 38230
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38230&action=edit
Failing file (pre-processed)
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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/70605] allocatable character scalar in type empty after assign
Date: Sat, 09 Apr 2016 08:48:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Blocks| |68241
Resolution|--- |DUPLICATE
--- Comment #4 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
This PR has been fixed on trunk (6.0) between revisions r230172 (2015-11-11,
wrong code) and r230421 (2015-11-16, OK), likely r230396 for trunk and r232203
for the gcc-5 branch.
I think it is a duplicate of pr67674.
*** This bug has been marked as a duplicate of bug 67674 ***
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68241
[Bug 68241] [meta-bug] Deferred-length character
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Subject: [Bug fortran/67674] Incorrect result or ICE for deferred-length character component
Date: Sat, 09 Apr 2016 08:48:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
CC| |nuclearlee at gmail dot com
--- Comment #5 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
*** Bug 70605 has been marked as a duplicate of this bug. ***
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Subject: [Bug fortran/68241] [meta-bug] Deferred-length character
Date: Sat, 09 Apr 2016 08:48:00 -0000
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Bug 68241 depends on bug 70605, which changed state.
Bug 70605 Summary: allocatable character scalar in type empty after assign
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70605
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Subject: [Bug fortran/70592] Addressing error in dynamically-allocated character array
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
This PR has been fixed on trunk (6.0) between revisions r232023 (2016-01-01,
wrong code) and r232451 (2016-01-15, OK), likely r232450 and r234093 for the
gcc-5 branch.
I did not find any duplicate. Should the test be added to the gfortran test
suite?
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68241
[Bug 68241] [meta-bug] Deferred-length character
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Subject: [Bug sanitizer/70573] FAIL: c-c++-common/asan/halt_on_error-1.c -O* execution test x86_64-apple-darwin15
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--- Comment #11 from dominiq at gcc dot gnu.org ---
Author: dominiq
Date: Sat Apr 9 09:24:45 2016
New Revision: 234848
URL: https://gcc.gnu.org/viewcvs?rev=234848&root=gcc&view=rev
Log:
2016-04-09 Dominique d'Humieres <dominiq@lps.ens.fr>
PR sanitizer/70573
* c-c++-common/asan/halt_on_error-1.c: Replace memset
with __builtin_memset
* c-c++-common/asan/halt_on_error-2.c: Likewise.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/c-c++-common/asan/halt_on_error-1.c
trunk/gcc/testsuite/c-c++-common/asan/halt_on_error-2.c
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Subject: [Bug sanitizer/70573] FAIL: c-c++-common/asan/halt_on_error-1.c -O* execution test x86_64-apple-darwin15
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
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--- Comment #12 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Closing as FIXED. Thanks for the quick feedback.
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Subject: [Bug testsuite/70516] Regtesting acats hangs on x86_64-apple-darwin15.4
Date: Sat, 09 Apr 2016 09:38:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |SUSPENDED
Last reconfirmed| |2016-04-09
Summary|[4.9/5/6 Regression] |Regtesting acats hangs on
|Regtesting acats hangs on |x86_64-apple-darwin15.4
|x86_64-apple-darwin15.4 |
Ever confirmed|0 |1
--- Comment #7 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
AFAICT this seems related to the current state of my system, thus I am removing
the regression marker and setting the status to SUSPENDED (allow me for some
time before closing this PR as INVALID).
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Subject: [Bug fortran/68600] Inlined MATMUL is too slow.
Date: Sat, 09 Apr 2016 10:14:00 -0000
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--- Comment #10 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> I think you are seeing the effects of inefficiencies of assumed-shape arrays.
>
> If you want to use matmul on very small matrix sizes, it is best to
> use fixed-size explicit arrays.
Then IMO the matmul inlining should be restricted to fixed-size explicit
arrays. Could this be done before the release of gcc-6?
>From gcc-bugs-return-521697-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 09 10:16:00 2016
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Subject: [Bug libfortran/70311] libgfortran build dies on "implicit declaration of function strncasecmp"
Date: Sat, 09 Apr 2016 10:16:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Could some mingw32 guru assign this PR to her/himself?
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Subject: [Bug fortran/70592] Addressing error in dynamically-allocated character array
Date: Sat, 09 Apr 2016 10:57:00 -0000
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--- Comment #3 from Peter Knowles <KnowlesPJ at Cardiff dot ac.uk> ---
I am using OSX but I agree, after building the compiler from the tip of
gcc-5-branch, that the problem does not exist there, but is present at
gcc-5_3_0_release.
>From gcc-bugs-return-521699-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 09 11:01:33 2016
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From: "ppalka at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/21802] Two-stage name lookup fails for operators
Date: Sat, 09 Apr 2016 11:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=21802
Patrick Palka <ppalka at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ppalka at gcc dot gnu.org
--- Comment #10 from Patrick Palka <ppalka at gcc dot gnu.org> ---
Yes, it looks like a bug. Could you please file a separate bug report? You
can use this as the minimal reproducer:
struct A { };
A operator+ (A &) { return A (); }
A operator+ (const A &) { return A (); }
template <typename T>
void
foo ()
{
+A ();
}
void
bar ()
{
foo<int> ();
}
>From gcc-bugs-return-521700-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 09 11:04:50 2016
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/70592] Addressing error in dynamically-allocated character array
Date: Sat, 09 Apr 2016 11:04:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70592
--- Comment #4 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> I am using OSX but I agree, after building the compiler from the tip
> of gcc-5-branch, that the problem does not exist there, but is present
> at gcc-5_3_0_release.
Indeed! but nothing can be done for 5.3.0 and 5.4.0 will be released soon.
>From gcc-bugs-return-521701-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 09 11:24:46 2016
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/70586] [4.9/5/6 Regression] wrong code at -O2 and -O3 on x86_64-linux-gnu in 32-bit and 64-bit modes
Date: Sat, 09 Apr 2016 11:24:00 -0000
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Sat Apr 9 11:23:51 2016
New Revision: 234849
URL: https://gcc.gnu.org/viewcvs?rev=234849&root=gcc&view=rev
Log:
PR tree-optimization/70586
* tree-ssa-ifcombine.c (bb_no_side_effects_p): Return false
for any calls.
* gcc.c-torture/execute/pr70586.c: New test.
Added:
trunk/gcc/testsuite/gcc.c-torture/execute/pr70586.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-ifcombine.c
>From gcc-bugs-return-521702-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 09 11:29:54 2016
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From: "fruko_eto at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/70609] New: std::experimental::filesystem::copy fails if the file size is 0 bytes
Date: Sat, 09 Apr 2016 11:29:00 -0000
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Bug ID: 70609
Summary: std::experimental::filesystem::copy fails if the file
size is 0 bytes
Product: gcc
Version: 5.3.1
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#include <experimental/filesystem>
#include <fstream>
int main() {
std::ofstream o("1.txt");
o.close();
std::experimental::filesystem::copy("1.txt", "2.txt");
}
The above code fails and when the exception caught, it gives
filesystem error: cannot copy: Input/output error [1.txt] [2.txt]
generic:5
It also gives the same error when I create the file with touch instead of
std::ofstream. However, it works when I write something to the & save & delete
everything & save again. After these operations even though file looks empty
its size is 1 byte and it works without a problem.
g++ version 5.3.1 20151207 (Red Hat 5.3.1-2)
Fedora 23
Only parameters given to g++ is -std=c++17 and -lstdc++fs
>From gcc-bugs-return-521703-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 09 11:31:47 2016
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Subject: [Bug tree-optimization/70586] [7 Regression] wrong code at -O2 and -O3 on x86_64-linux-gnu in 32-bit and 64-bit modes
Date: Sat, 09 Apr 2016 11:31:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|4.9.4 |7.0
Summary|[4.9/5/6 Regression] wrong |[7 Regression] wrong code
|code at -O2 and -O3 on |at -O2 and -O3 on
|x86_64-linux-gnu in 32-bit |x86_64-linux-gnu in 32-bit
|and 64-bit modes |and 64-bit modes
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
This particular issue fixed for 6.x. Retargetting at 7.0+ for the general
issue whether pure/const functions can trap or raise FPU exceptions and how we
should handle them.
>From gcc-bugs-return-521704-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 09 11:36:16 2016
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From: "fruko_eto at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/70609] std::experimental::filesystem::copy fails if the file size is 0 bytes
Date: Sat, 09 Apr 2016 11:36:00 -0000
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--- Comment #1 from furkan <fruko_eto at hotmail dot com> ---
Also worth to note that I've tested a similar program with Boost::Filesystem,
QFile and Poco::File they all worked, so I don't think there is a
system-related bug
>From gcc-bugs-return-521705-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 09 11:59:59 2016
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/61628] [MinGW)Write of medium sized or larger matrix fails without error message.
Date: Sat, 09 Apr 2016 11:59:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |FIXED
--- Comment #24 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> > Arjen, any further results or information on this bug?
>
> PING!
No feedback for over a year, closing as FIXED.
>From gcc-bugs-return-521706-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 09 12:02:53 2016
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Subject: [Bug fortran/62007] default(none) conflicts with iteration variable in openmp parallel loop simd
Date: Sat, 09 Apr 2016 12:02:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
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--- Comment #11 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Could this PR be closed as FIXED?
No feedback, closing.
>From gcc-bugs-return-521708-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 09 12:04:28 2016
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Subject: [Bug fortran/38979] OpenMP extension: THREADPRIVATE for EQUIVALENCEd symbols
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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--- Comment #13 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> > Any progress after six years?
>
> PING!
No feedback, closing as WONTFIX.
>From gcc-bugs-return-521707-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 09 12:04:28 2016
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Subject: [Bug fortran/42478] [meta-bug] gfortran OpenMP bugs
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Bug 42478 depends on bug 38979, which changed state.
Bug 38979 Summary: OpenMP extension: THREADPRIVATE for EQUIVALENCEd symbols
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=38979
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Subject: [Bug fortran/27436] gfortran: Abort compiling if there are insufficient data descriptors in format after reversion
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--- Comment #4 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
See also pr28397.
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Subject: [Bug fortran/28397] Check format mismatches at compile time
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--- Comment #6 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
See also pr27436.
>From gcc-bugs-return-521711-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 09 12:15:00 2016
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Subject: [Bug c++/36159] C++ compiler should issue a warning with missing new operator
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=36159
--- Comment #17 from Marios Hadjieleftheriou <mhadji at gmail dot com> ---
(In reply to Martin Sebor from comment #12)
> Confirmed. As noted in bug 67911, the solution proposed for the next
> version of C++ is the following:
> http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2015/p0035r0.html
> Until it's accepted and implemented, issuing a warning would help users
> avoid the trap. I happen to be working in this area so I'll see if I can
> come up with something.
The link posted above appears to be broken.
>From gcc-bugs-return-521712-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 09 12:43:46 2016
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Subject: [Bug fortran/63158] Possible wrong code with absend optional BT_CLASS -> optional BT_DERIVED dummy argument
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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--- Comment #4 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Should I close this PR as INVALID to get an answer?
No feedback, let's try it!-(
>From gcc-bugs-return-521713-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 09 12:45:03 2016
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From: "david.abdurachmanov at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70610] New: [6 regression] error: invalid initialization of non-const reference of type
Date: Sat, 09 Apr 2016 12:45:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70610
Bug ID: 70610
Summary: [6 regression] error: invalid initialization of
non-const reference of type
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
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This is a follow up of comment:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=21802#c8
Caused by:
d175f0193ed47b61eafd213ca2d3dde73f8f5996 is the first bad commit
commit d175f0193ed47b61eafd213ca2d3dde73f8f5996
Author: ppalka <ppalka@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Tue Dec 15 03:33:53 2015 +0000
Fix PR c++/21802 (two-stage name lookup fails for operators)
Works fine with GCC 5.3.0, Clang 3.7.0 and ICC (16.0.2 20160204).
Minimal reproducer by Patrick Palka:
struct A { };
A operator+ (A &) { return A (); }
A operator+ (const A &) { return A (); }
template <typename T>
void
foo ()
{
+A ();
}
void
bar ()
{
foo<int> ();
}
$ g++ -c -ansi test.cc
test.cc: In instantiation of 'void foo() [with T = int]':
test.cc:17:13: required from here
test.cc:11:3: error: invalid initialization of non-const reference of type 'A&'
from an rvalue of type 'A'
+A ();
^~~~~
test.cc:3:3: note: initializing argument 1 of 'A operator+(A&)'
A operator+ (A &) { return A (); }
^~~~~~~~
Note, that removing -ansi solves the issue.
>From gcc-bugs-return-521714-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 09 13:10:28 2016
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/51632] [OOP] Bogus argument checking for generated _def_init parameter and _copy procedure with CAF
Date: Sat, 09 Apr 2016 13:10:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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--- Comment #5 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> > TODO: Check that this patch doesn't worsen the handling of (non)polymorphic
> > coarray components of a polymorphic variable are properly handled for
> > DEALLOCATE/ALLOCATE/intrinsic assignment.
>
> Any hint about how to do that?
No feedback, closing as FIXED. Please open new PR(s) with relevant information
for remaining issue(s).
>From gcc-bugs-return-521715-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 09 13:10:28 2016
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Subject: [Bug fortran/52403] coarray component gives error with CLASS( ) declaration
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Bug 52403 depends on bug 51632, which changed state.
Bug 51632 Summary: [OOP] Bogus argument checking for generated _def_init parameter and _copy procedure with CAF
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=51632
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>From gcc-bugs-return-521716-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 09 13:30:23 2016
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Subject: [Bug fortran/70592] Addressing error in dynamically-allocated character array
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--- Comment #5 from dominiq at gcc dot gnu.org ---
Author: dominiq
Date: Sat Apr 9 13:29:32 2016
New Revision: 234850
URL: https://gcc.gnu.org/viewcvs?rev=234850&root=gcc&view=rev
Log:
2016-04-09 Dominique d'Humieres <dominiq@lps.ens.fr>
PR fortran/70592
* gfortran.dg/deferred_character_16.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/deferred_character_16.f90
Modified:
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/51820] [doc] underscoring documentation incorrect
Date: Sat, 09 Apr 2016 14:00:00 -0000
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--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Is the following patch a step in the right direction?
--- ../_clean/gcc/fortran/invoke.texi 2016-03-13 09:07:16.000000000 +0100
+++ gcc/fortran/invoke.texi 2016-04-09 15:58:43.000000000 +0200
@@ -1283,9 +1284,18 @@ Do not transform names of entities speci
source file by appending underscores to them.
With @option{-funderscoring} in effect, GNU Fortran appends one
-underscore to external names with no underscores. This is done to ensure
+underscore to external names. This is done to ensure
compatibility with code produced by many UNIX Fortran compilers.
+Note that this applies only to "F77" names, as modules, OOP stuff,
+@code{bind(c)}, and other modernities are mangled differently
+(or for plain @code{bind(C)}, never mangled), and is not modifiable
+by these command-line options.
+
+Also note that @code{bind(C)} is a more robust way to create external
+symbols with some specific name, rather than playing with compiler
+options.
+
@emph{Caution}: The default behavior of GNU Fortran is
incompatible with @command{f2c} and @command{g77}, please use the
@option{-ff2c} option if you want object files compiled with
@@ -1306,7 +1316,7 @@ I = J() + MAX_COUNT (MY_VAR, LVAR)
@noindent
is implemented as something akin to:
@smallexample
-i = j_() + max_count__(&my_var__, &lvar);
+i = j_() + max_count_(&my_var_, &lvar);
@end smallexample
With @option{-fno-underscoring}, the same statement is implemented as:
@@ -1336,11 +1346,11 @@ could make finding unresolved-reference
cases---they might occur at program run time, and show up only as
buggy behavior at run time.
-In future versions of GNU Fortran we hope to improve naming and linking
-issues so that debugging always involves using the names as they appear
-in the source, even if the names as seen by the linker are mangled to
-prevent accidental linking between procedures with incompatible
-interfaces.
+%In future versions of GNU Fortran we hope to improve naming and linking
+%issues so that debugging always involves using the names as they appear
+%in the source, even if the names as seen by the linker are mangled to
+%prevent accidental linking between procedures with incompatible
+%interfaces.
@item -fsecond-underscore
@opindex @code{fsecond-underscore}
@@ -1355,8 +1365,7 @@ By default, GNU Fortran appends an under
names. If this option is used GNU Fortran appends two
underscores to names with underscores and one underscore to external names
with no underscores. GNU Fortran also appends two underscores to
-internal names with underscores to avoid naming collisions with external
-names.
+internal names with underscores.
This option has no effect if @option{-fno-underscoring} is
in effect. It is implied by the @option{-ff2c} option.
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Subject: [Bug fortran/58001] Make it possible to silence "Extension: Tab character in format" warning
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
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--- Comment #10 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
What happened with patch in comment 9?
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Subject: [Bug fortran/58667] Add -Wfloat-conversion
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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> ---
Another WONTFIX?
Note that the GCC documentation
-Wfloat-conversion
Warn for implicit conversions that reduce the precision of a real value. This
includes conversions from real to integer, and from higher precision real to
lower precision real values. This option is also enabled by -Wconversion.
should mention that the command line option '-Wfloat-conversion' is valid for
C/C++/ObjC/ObjC++ but not for Fortran.
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> From Richard Maine's answer at
> https://groups.google.com/forum/#!topic/comp.lang.fortran/3idUN6kMjjo
> it looks to me that the warning expectation is wrong. Am I making a mistake?
> If not, I'll close this PR as INVALID.
No feedback, closing.
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--- Comment #7 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
PING!
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Subject: [Bug ipa/70583] [6 Regression] FAIL: g++.old-deja/g++.abi/vtable2.C -std=gnu++98 execution test
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John David Anglin <danglin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target|hppa64-hp-hpux11.11 |hppa*-*-* (elf)
CC| |hubicka at gcc dot gnu.org
Component|c++ |ipa
Host|hppa64-hp-hpux11.11 |
Build|hppa64-hp-hpux11.11 |
--- Comment #1 from John David Anglin <danglin at gcc dot gnu.org> ---
Introduced by:
Author: hubicka
Date: Mon Apr 4 09:26:29 2016
New Revision: 234708
URL: https://gcc.gnu.org/viewcvs?rev=234708&root=gcc&view=rev
Log:
PR ipa/68881
* cgraph.h (symtab_node::copy_visibility_from): New function.
* symtab.c (symtab_node::copy_visibility_from): New function.
* ipa-visibility.c (optimize_weakref): New function.
(function_and_variable_visibility): Use it.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/cgraph.h
trunk/gcc/ipa-visibility.c
trunk/gcc/symtab.c
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Subject: [Bug fortran/63469] Automatic reallocation of allocatable scalar length even when substring implicitly specified
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--- Comment #5 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
The test in comment 4 works with trunk (6.0), but not with 5.3.1.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70611
Bug ID: 70611
Summary: Compiling binutils with -flto -Wstack-usage fails.
Product: gcc
Version: 5.3.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: lto
Assignee: unassigned at gcc dot gnu.org
Reporter: dilyan.palauzov at aegee dot org
Target Milestone: ---
After binutils introduced passing -Wstack-usgage when compiling gas
(https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=9780e045073b1719a7a4c6cbe00e4aa7525bd180),
it does not compile anymore with -flto:
export CFLAGS="-pipe -O3 -fno-fat-lto-objects -flto"
export CXXFLAGS="-pipe -O3 -fno-fat-lto-objects -flto"
export LDFLAGS="-Wl,-O1,-z,relro,-s"
/git/binutils-gdb/gas/configure --with-system-zlib --enable-lto
--enable-threads --with-system-zlib --enable-compressed-debug-sections=none
make
[...]
make[2]: Entering directory '/root/binutils/gas'
/bin/bash ./libtool --tag=CC --mode=link gcc -W -Wall -Wstrict-prototypes
-Wmissing-prototypes -Wshadow -Wstack-usage=262144 -Werror -Wwrite-strings
-pipe -O3 -fno-fat-lto-objects -flto -Wl,-O1,-z,relro,-s -flto=8 -L/lib64 -o
as-new app.o as.o atof-generic.o compress-debug.o cond.o depend.o dwarf2dbg.o
dw2gencfi.o ecoff.o ehopt.o expr.o flonum-copy.o flonum-konst.o flonum-mult.o
frags.o hash.o input-file.o input-scrub.o listing.o literal.o macro.o
messages.o output-file.o read.o remap.o sb.o stabs.o subsegs.o symbols.o
write.o tc-i386.o obj-elf.o atof-ieee.o ../opcodes/libopcodes.la
../bfd/libbfd.la ../libiberty/libiberty.a -ldl
libtool: link: gcc -W -Wall -Wstrict-prototypes -Wmissing-prototypes -Wshadow
-Wstack-usage=262144 -Werror -Wwrite-strings -pipe -O3 -fno-fat-lto-objects
-flto -Wl,-O1 -Wl,-z -Wl,relro -Wl,-s -flto=8 -o as-new app.o as.o
atof-generic.o compress-debug.o cond.o depend.o dwarf2dbg.o dw2gencfi.o ecoff.o
ehopt.o expr.o flonum-copy.o flonum-konst.o flonum-mult.o frags.o hash.o
input-file.o input-scrub.o listing.o literal.o macro.o messages.o output-file.o
read.o remap.o sb.o stabs.o subsegs.o symbols.o write.o tc-i386.o obj-elf.o
atof-ieee.o -L/lib64 ../opcodes/.libs/libopcodes.a ../bfd/.libs/libbfd.a -lz
../libiberty/libiberty.a -ldl
/git/binutils-gdb/libiberty/make-relative-prefix.c: In function
'make_relative_prefix_1.constprop':
/git/binutils-gdb/libiberty/make-relative-prefix.c:228:1: error: stack usage
might be unbounded [-Werror=stack-usage=]
make_relative_prefix_1 (const char *progname, const char *bin_prefix,
^
lto1: all warnings being treated as errors
make[3]: *** [/tmp/ccGFedJA.ltrans24.ltrans.o] Error 1
make[3]: *** Waiting for unfinished jobs....
lto-wrapper: fatal error: make returned 2 exit status
compilation terminated.
/usr/local/bin/ld: error: lto-wrapper failed
collect2: error: ld returned 1 exit status
Makefile:769: recipe for target 'as-new' failed
make[2]: *** [as-new] Error 1
make[2]: Leaving directory '/root/binutils/gas'
I use gcc (GCC) 5.3.1 20160407 and in /usr/local and have symlink
/usr/local/lib/bfd-plugins/liblto_plugin.so ->
/usr/local/libexec/gcc/x86_64-unknown-linux-gnu/5.3.1/liblto_plugin.so .
This happens also when compiling ld.bfd, gprof, binutils/size .
I guess the problem is not in binutils, as it fails in libiberty, which comes
from gcc. I fails also when I replace libiberty bundled with binutils/master
with libiberty comming with gcc/gcc-5-branch .
>From gcc-bugs-return-521725-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 09 15:29:10 2016
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Subject: [Bug tree-optimization/68953] [6 Regression] [graphite] Wrong code w/ -O[12] -floop-nest-optimize
Date: Sat, 09 Apr 2016 15:29:00 -0000
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--- Comment #9 from vries at gcc dot gnu.org ---
Author: vries
Date: Sat Apr 9 15:28:24 2016
New Revision: 234851
URL: https://gcc.gnu.org/viewcvs?rev=234851&root=gcc&view=rev
Log:
Fix pdr accesses order
2016-04-09 Tom de Vries <tom@codesourcery.com>
PR tree-optimization/68953
* graphite-sese-to-poly.c (pdr_add_memory_accesses): Order accesses
from
first to last subscript.
* gcc.dg/graphite/pr68953.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/graphite/pr68953.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/graphite-sese-to-poly.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-521726-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 09 15:29:23 2016
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From: "daniel.gutson at tallertechnologies dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70584] constexpr variables cannot be used as intrinsic arguments where an immediate is expected
Date: Sat, 09 Apr 2016 15:29:00 -0000
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--- Comment #4 from Daniel Gutson <daniel.gutson at tallertechnologies dot com> ---
Thanks Martin.
Andres is finishing 70210 soon next week, and he can address this after solving
it. Feel free to assign this issue to him
(andres.tiraboschi@tallertechnologies.com).
>From gcc-bugs-return-521727-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 09 15:30:44 2016
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Subject: [Bug c++/70584] constexpr variables cannot be used as intrinsic arguments where an immediate is expected
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--- Comment #5 from Daniel Gutson <daniel.gutson at tallertechnologies dot com> ---
(In reply to Daniel Gutson from comment #4)
> Thanks Martin.
>
> Andres is finishing 70210 soon next week, and he can address this after
s/70210/70201/
> solving it. Feel free to assign this issue to him
> (andres.tiraboschi@tallertechnologies.com).
>From gcc-bugs-return-521728-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 09 15:32:10 2016
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Subject: [Bug fortran/56149] 64 bit gFortran-C interop hidden character argument length passed as 32 bit value
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |WONTFIX
--- Comment #10 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Is there still some interest for this PR?
No feedback, closing as WONTFIX. It may be related to pr66310.
>From gcc-bugs-return-521729-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 09 15:40:15 2016
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From: "daniel.gutson at tallertechnologies dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70612] New: -mtune=native -maes does not detect that AES is not present
Date: Sat, 09 Apr 2016 15:40:00 -0000
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Bug ID: 70612
Summary: -mtune=native -maes does not detect that AES is not
present
Product: gcc
Version: 6.0
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I didn't investigate this, but despite /proc/cpuinfo does not list aes as a
capability, I think that the combination -mtune=native -maes should fail.
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Subject: [Bug rtl-optimization/64886] FAIL: gcc.dg/pr64434.c scan-rtl-dump-times expand "Swap operands" 1
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--- Comment #3 from John David Anglin <danglin at gcc dot gnu.org> ---
Author: danglin
Date: Sat Apr 9 15:43:05 2016
New Revision: 234852
URL: https://gcc.gnu.org/viewcvs?rev=234852&root=gcc&view=rev
Log:
PR rtl-optimization/64886
* gcc.dg/pr64434.c: Skip on hppa*-*-hpux*.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/pr64434.c
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Subject: [Bug rtl-optimization/64886] FAIL: gcc.dg/pr64434.c scan-rtl-dump-times expand "Swap operands" 1
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--- Comment #4 from John David Anglin <danglin at gcc dot gnu.org> ---
Author: danglin
Date: Sat Apr 9 15:47:50 2016
New Revision: 234853
URL: https://gcc.gnu.org/viewcvs?rev=234853&root=gcc&view=rev
Log:
PR rtl-optimization/64886
* gcc.dg/pr64434.c: Skip on hppa*-*-hpux*.
Modified:
branches/gcc-5-branch/gcc/testsuite/ChangeLog
branches/gcc-5-branch/gcc/testsuite/gcc.dg/pr64434.c
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Subject: [Bug tree-optimization/68644] [6 Regression] FAIL: gcc.dg/tree-ssa/ivopts-lt-2.c scan-tree-dump-times ivopts "PHI <p_" 1
Date: Sat, 09 Apr 2016 15:55:00 -0000
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--- Comment #3 from John David Anglin <danglin at gcc dot gnu.org> ---
Author: danglin
Date: Sat Apr 9 15:54:29 2016
New Revision: 234854
URL: https://gcc.gnu.org/viewcvs?rev=234854&root=gcc&view=rev
Log:
PR tree-optimization/68644
* gcc.dg/tree-ssa/ivopts-lt-2.c: Skip on hppa*-*-*.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/tree-ssa/ivopts-lt-2.c
>From gcc-bugs-return-521733-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 09 15:56:27 2016
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Subject: [Bug tree-optimization/68644] [6 Regression] FAIL: gcc.dg/tree-ssa/ivopts-lt-2.c scan-tree-dump-times ivopts "PHI <p_" 1
Date: Sat, 09 Apr 2016 15:56:00 -0000
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--- Comment #4 from John David Anglin <danglin at gcc dot gnu.org> ---
Author: danglin
Date: Sat Apr 9 15:55:42 2016
New Revision: 234855
URL: https://gcc.gnu.org/viewcvs?rev=234855&root=gcc&view=rev
Log:
PR tree-optimization/68644
* gcc.dg/tree-ssa/ivopts-lt-2.c: Skip on hppa*-*-*.
Modified:
branches/gcc-5-branch/gcc/testsuite/ChangeLog
branches/gcc-5-branch/gcc/testsuite/gcc.dg/tree-ssa/ivopts-lt-2.c
>From gcc-bugs-return-521734-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 09 16:02:18 2016
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From: "vries at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/68953] [6 Regression] [graphite] Wrong code w/ -O[12] -floop-nest-optimize
Date: Sat, 09 Apr 2016 16:02:00 -0000
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--- Comment #10 from vries at gcc dot gnu.org ---
asked follow-up question (
https://gcc.gnu.org/ml/gcc-patches/2016-04/msg00444.html ), waiting for answer
before marking fixed-resolved.
>From gcc-bugs-return-521735-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 09 16:08:52 2016
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/70612] -mtune=native -maes does not detect that AES is not present
Date: Sat, 09 Apr 2016 16:08:00 -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> ---
-mtune=native is just about tuning, not ISA selection, that is what
-march=native is for. But even that just expands to the particular options
determined from the host CPU, you can always override it through other options.
So I don't see any bug from your description.
>From gcc-bugs-return-521736-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 09 16:14:48 2016
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Subject: [Bug fortran/70592] Addressing error in dynamically-allocated character array
Date: Sat, 09 Apr 2016 16:14:00 -0000
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--- Comment #6 from dominiq at gcc dot gnu.org ---
Author: dominiq
Date: Sat Apr 9 16:14:02 2016
New Revision: 234858
URL: https://gcc.gnu.org/viewcvs?rev=234858&root=gcc&view=rev
Log:
2016-04-09 Dominique d'Humieres <dominiq@lps.ens.fr>
PR fortran/70592
* gfortran.dg/deferred_character_17.f90: New test.
Added:
branches/gcc-5-branch/gcc/testsuite/gfortran.dg/deferred_character_17.f90
Modified:
branches/gcc-5-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-521737-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 09 16:24:34 2016
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Subject: [Bug target/70612] -mtune=native -maes does not detect that AES is not present
Date: Sat, 09 Apr 2016 16:24:00 -0000
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Daniel Gutson <daniel.gutson at tallertechnologies dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Severity|normal |enhancement
--- Comment #2 from Daniel Gutson <daniel.gutson at tallertechnologies dot com> ---
My bad, I meant -march.
But in case this is not a bug, I still think we could do better at least with a
warning.
>From gcc-bugs-return-521739-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 09 16:43:49 2016
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Subject: [Bug fortran/70592] Addressing error in dynamically-allocated character array
Date: Sat, 09 Apr 2016 16:43:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
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--- Comment #7 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Test committed to trunk and the gcc-5 branch, closing as FIXED.
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Subject: [Bug fortran/68241] [meta-bug] Deferred-length character
Date: Sat, 09 Apr 2016 16:43:00 -0000
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Bug 68241 depends on bug 70592, which changed state.
Bug 70592 Summary: Addressing error in dynamically-allocated character array
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70592
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----------------------------------------------------------------------------
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Subject: [Bug testsuite/70324] FAIL: gcc.dg/pic-1.c (test for excess errors)
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John David Anglin <danglin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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Component|target |testsuite
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--- Comment #1 from John David Anglin <danglin at gcc dot gnu.org> ---
Fixed by commit 234859.
https://gcc.gnu.org/ml/gcc-cvs/2016-04/msg00200.html
>From gcc-bugs-return-521741-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 09 17:04:18 2016
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Subject: [Bug testsuite/66402] gcc.dg/uninit-19.c FAILs with PIE
Date: Sat, 09 Apr 2016 17:04:00 -0000
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--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Duplicate of pr65364?
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Subject: [Bug rtl-optimization/66669] FAIL: gcc.dg/loop-8.c
Date: Sat, 09 Apr 2016 17:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66669
John David Anglin <danglin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed|2015-12-01 00:00:00 |2016-04-09
Ever confirmed|0 |1
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Subject: [Bug rtl-optimization/66669] FAIL: gcc.dg/loop-8.c
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--- Comment #2 from John David Anglin <danglin at gcc dot gnu.org> ---
Author: danglin
Date: Sat Apr 9 17:15:15 2016
New Revision: 234861
URL: https://gcc.gnu.org/viewcvs?rev=234861&root=gcc&view=rev
Log:
PR rtl-optimization/66669
* gcc.dg/loop-8.c: Skip on hppa*-*-*.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/loop-8.c
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Subject: [Bug testsuite/64039] [5 Regression] FAIL: gcc.dg/tree-ssa/ssa-dom-cse-2.c scan-tree-dump optimized "return 28;"
Date: Sat, 09 Apr 2016 17:37:00 -0000
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--- Comment #4 from John David Anglin <danglin at gcc dot gnu.org> ---
Author: danglin
Date: Sat Apr 9 17:36:24 2016
New Revision: 234863
URL: https://gcc.gnu.org/viewcvs?rev=234863&root=gcc&view=rev
Log:
PR testsuite/64039
* gcc.dg/tree-ssa/ssa-dom-cse-2.c: xfail scan-tree-dump on
hppa*64*-*-*.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-dom-cse-2.c
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Subject: [Bug fortran/52393] I/O: "READ format" statement with parenthesed default-char-expr
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Jerry DeLisle <jvdelisle at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jvdelisle at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |jvdelisle at gcc dot gnu.org
--- Comment #8 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Let me add this to my list and then I will investigate in a little while
>From gcc-bugs-return-521746-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 09 17:59:53 2016
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From: "jvdelisle at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/68600] Inlined MATMUL is too slow.
Date: Sat, 09 Apr 2016 17:59:00 -0000
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--- Comment #11 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
(In reply to Jerry DeLisle from comment #8)
> Created attachment 36887 [details]
> A faster version
>
> I took the example code found in
> http://wiki.cs.utexas.edu/rvdg/HowToOptimizeGemm/ where the register based
> vector computations are explicitly called via the SSE registers and
> converted it to use the builtin gcc vector extensions. I had to experiment
> a little to get some of the equivalent operations of the original code.
>
> With only -O2 and march=native I am getting good results. I need to roll
> this into the other test program yet to confirm the gflops are being
> computed correctly. The diff value is comparing to the reference naive
> results to check the computation is correct.
>
> MY_MMult = [
> Size: 40, Gflops: 1.828571e+00, Diff: 2.664535e-15
> Size: 80, Gflops: 3.696751e+00, Diff: 7.105427e-15
> Size: 120, Gflops: 4.051583e+00, Diff: 1.065814e-14
> Size: 160, Gflops: 4.015686e+00, Diff: 1.421085e-14
> Size: 200, Gflops: 4.029212e+00, Diff: 2.131628e-14
> Size: 240, Gflops: 3.972414e+00, Diff: 2.486900e-14
> Size: 280, Gflops: 3.881188e+00, Diff: 2.842171e-14
> Size: 320, Gflops: 3.872371e+00, Diff: 3.552714e-14
> Size: 360, Gflops: 3.887676e+00, Diff: 4.973799e-14
> Size: 400, Gflops: 3.862052e+00, Diff: 4.973799e-14
> Size: 440, Gflops: 3.886575e+00, Diff: 4.973799e-14
> Size: 480, Gflops: 3.910124e+00, Diff: 6.039613e-14
> Size: 520, Gflops: 3.863706e+00, Diff: 6.394885e-14
> Size: 560, Gflops: 3.976947e+00, Diff: 6.750156e-14
> Size: 600, Gflops: 4.002631e+00, Diff: 7.460699e-14
> Size: 640, Gflops: 3.992507e+00, Diff: 8.171241e-14
> Size: 680, Gflops: 3.964570e+00, Diff: 9.237056e-14
> Size: 720, Gflops: 3.973661e+00, Diff: 1.101341e-13
> Size: 760, Gflops: 3.982346e+00, Diff: 1.065814e-13
> Size: 800, Gflops: 3.869291e+00, Diff: 8.881784e-14
> Size: 840, Gflops: 3.936271e+00, Diff: 1.065814e-13
> Size: 880, Gflops: 3.931259e+00, Diff: 1.030287e-13
> Size: 920, Gflops: 3.912907e+00, Diff: 1.207923e-13
> Size: 960, Gflops: 3.938391e+00, Diff: 1.278977e-13
> Size: 1000, Gflops: 3.945754e+00, Diff: 1.421085e-13
(In reply to Dominique d'Humieres from comment #10)
> > I think you are seeing the effects of inefficiencies of assumed-shape arrays.
> >
> > If you want to use matmul on very small matrix sizes, it is best to
> > use fixed-size explicit arrays.
>
> Then IMO the matmul inlining should be restricted to fixed-size explicit
> arrays. Could this be done before the release of gcc-6?
I was experimenting some more here a few days ago. I really think that
inlineing shold be disabled above some threshold. On larger arrays, the
runtime library outperforms inline and right now by default the runtime
routines are never used unless you provide -fno-frontend-optimize which is
counter intuitive for the larger arrays.
If one compiles with -march=native -mavx -Ofast etc etc, the inline can do
fairly well on the larger, however when we update the runtime routines to
something like shown in comment #8 it will make even more sense to not do
inline all the time. (Unless of course we further optimize the
frontend-optimize to do better.)
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Subject: [Bug fortran/47040] Make error message for empty array constructor more helpful/correct
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
CC| |kargl at troutmask dot apl.washing
| |ton.edu
Resolution|--- |INVALID
--- Comment #7 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Patch submitted at https://gcc.gnu.org/ml/fortran/2016-04/msg00024.html.
Flatly rejected at https://gcc.gnu.org/ml/fortran/2016-04/msg00025.html.
Per https://gcc.gnu.org/ml/fortran/2016-04/msg00030.html
> The above error is correct. Adding any text referring
> to type-spec is wrong.
closing as INVALID.
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--- Comment #10 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Author: jvdelisle
Date: Sat Apr 9 19:09:02 2016
New Revision: 234864
URL: https://gcc.gnu.org/viewcvs?rev=234864&root=gcc&view=rev
Log:
2016-04-09 Jerry DeLisle <jvdelisle@gcc.gnu.org>
PR fortran/68566
* array.c (match_array_element_spec): Add check for non-integer.
* simplify.c (gfc_simplify_reshape): If source shape is NULL return.
PR fortran/68566
* gfortran.dg/pr36192.f90: Update test.
* gfortran.dg/pr36192_1.f90: Update test.
* gfortran.dg/real_dimension_1.f: Update test.
* gfortran.dg/parameter_array_init_7.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/parameter_array_init_7.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/array.c
trunk/gcc/fortran/simplify.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gfortran.dg/pr36192.f90
trunk/gcc/testsuite/gfortran.dg/pr36192_1.f90
trunk/gcc/testsuite/gfortran.dg/real_dimension_1.f
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Subject: [Bug testsuite/70150] Additonal test failures with --enable-default-pie
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--- Comment #11 from H.J. Lu <hjl.tools at gmail dot com> ---
*** Bug 66402 has been marked as a duplicate of this bug. ***
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Subject: [Bug testsuite/66402] gcc.dg/uninit-19.c FAILs with PIE
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> ---
Dup.
*** This bug has been marked as a duplicate of bug 70150 ***
>From gcc-bugs-return-521751-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 09 19:37:50 2016
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Subject: [Bug testsuite/70150] Additonal test failures with --enable-default-pie
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--- Comment #12 from H.J. Lu <hjl.tools at gmail dot com> ---
Patches are posted at
https://gcc.gnu.org/ml/gcc-patches/2016-03/msg00929.html
https://gcc.gnu.org/ml/gcc-patches/2016-03/msg00995.html
>From gcc-bugs-return-521752-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 09 21:10:55 2016
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From: "Alexander.Voigt at desy dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/70607] The return type of std::conj must be std::complex<T>
Date: Sat, 09 Apr 2016 21:10:00 -0000
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--- Comment #2 from Alexander Voigt <Alexander.Voigt at desy dot de> ---
I absolutely agree, that the definition of the std::conj() overloads in C++11
is problematic. However, in my opinion one has to be strict when implementing
the standard. Otherwise, people might accidentally write non-portable C++11
code and g++ does not complain.
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Subject: [Bug libfortran/25830] [libgfortran] Optionally support multi-process locking
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
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--- Comment #5 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
This PR did not get any attention for almost five years. Any point to keep it
open?
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Subject: [Bug fortran/30792] DATA implied-do substring allowed with -stdù5/f2003
Date: Sat, 09 Apr 2016 21:39:00 -0000
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--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Still present at revision r234859.
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From: "mhadji at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70603] gcc alignas issue with pointers to class
Date: Sun, 10 Apr 2016 00:36:00 -0000
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--- Comment #3 from Marios Hadjieleftheriou <mhadji at gmail dot com> ---
I am trying to use posix_memalign and a double pointer to double, and that is
also failing. Is this an overalignment issue as well?
#include <iostream>
#include <cstddef>
struct B {
B() {
x = new double*[1];
void* p = x[0];
posix_memalign(&p, 32, 1);
}
double** x;
};
struct A
{
A() { b1 = new B(); b2 = new B(); }
B* b1;
B* b2;
};
int main(int argc, char** argv) {
A a;
int ret = reinterpret_cast<intptr_t>(a.b1->x) % 32 +
reinterpret_cast<intptr_t>(a.b2->x) % 32;
return ret;
}
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Subject: [Bug c++/70603] gcc alignas issue with pointers to class
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--- Comment #4 from Marios Hadjieleftheriou <mhadji at gmail dot com> ---
But of course. I am checking the alignment of the wrong things, in my
example...
>From gcc-bugs-return-521757-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 10 02:25:25 2016
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Subject: [Bug c++/70613] New: -fabi-version docs don't match implementation
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70613
Bug ID: 70613
Summary: -fabi-version docs don't match implementation
Product: gcc
Version: 5.3.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: wilson at gcc dot gnu.org
Target Milestone: ---
In docs/invoke.texi, it says that 8 is the highest value for -fabi-version. In
c-family/c-opts.c, flag_abi_version gets set to 9. I see two places that check
for abi_version of 9 in cp/class.c. And one place in cp/decl.c.
At first glance it appears that this is just a documentation bug. I haven't
verified this yet.
Since gcc-5 is the first version that defaults to -fabi-version=0, we really
should get the -fabi-version docs correct.
>From gcc-bugs-return-521758-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 10 04:27:36 2016
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From: "kazunori.ueda.ku at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/70614] New: GCC gets stuck with -O
Date: Sun, 10 Apr 2016 04:27:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70614
Bug ID: 70614
Summary: GCC gets stuck with -O
Product: gcc
Version: 5.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: kazunori.ueda.ku at gmail dot com
Target Milestone: ---
Created attachment 38231
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38231&action=edit
obtained by "gcc -c -save-temps -v wave.c" (without -O)
Compilation of the attached (machine-generated) program gets stuck with -On
(n>0)
(i.e., without reporting the next "COLLECT_GCC_OPTIONS=" message). Happens
also with -m32. Does not happen with -O0. The same problem happened in
several (but not all) previous versions of gcc (Linux and Cygwin).
(FYI, compilation of all other machine-generated programs from the same
software we have tested works fine with -O.) Thanks for your help.
$ gcc -c -O -v wave.i
Using built-in specs.
COLLECT_GCC=gcc
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu 5.2.1-22ubuntu2'
--with-bugurl=file:///usr/share/doc/\
gcc-5/README.Bugs --enable-languages=c,ada,c++,java,go,d,fortran,objc,obj-c++
--prefix=/usr --program-suffix=-5 --en\
able-shared --enable-linker-build-id --libexecdir=/usr/lib
--without-included-gettext --enable-threads=posix --libdi\
r=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes -\
-with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin -\
-with-system-zlib --disable-browser-plugin --enable-java-awt=gtk
--enable-gtk-cairo --with-java-home=/usr/lib/jvm/ja\
va-1.5.0-gcj-5-amd64/jre --enable-java-home
--with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-5-amd64 --with-jvm-jar-d\
ir=/usr/lib/jvm-exports/java-1.5.0-gcj-5-amd64 --with-arch-directory=amd64
--with-ecj-jar=/usr/share/java/eclipse-ec\
j.jar --enable-objc-gc --enable-multiarch --disable-werror --with-arch-32=i686
--with-abi=m64 --with-multilib-list=m\
32,m64,mx32 --enable-multilib --with-tune=generic --enable-checking=release
--build=x86_64-linux-gnu --host=x86_64-l\
inux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 5.2.1 20151010 (Ubuntu 5.2.1-22ubuntu2)
COLLECT_GCC_OPTIONS='-c' '-O' '-v' '-mtune=generic' '-march=x86-64'
/usr/lib/gcc/x86_64-linux-gnu/5/cc1 -fpreprocessed wave.i -quiet -dumpbase
wave.i -mtune=generic -march=x86-64 -aux\
base wave -O -version -fstack-protector-strong -Wformat -Wformat-security -o
/tmp/ccyZdX3r.s
GNU C11 (Ubuntu 5.2.1-22ubuntu2) version 5.2.1 20151010 (x86_64-linux-gnu)
compiled by GNU C version 5.2.1 20151010, GMP version 6.0.0, MPFR
version 3.1.3, MPC version 1.0.3
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU C11 (Ubuntu 5.2.1-22ubuntu2) version 5.2.1 20151010 (x86_64-linux-gnu)
compiled by GNU C version 5.2.1 20151010, GMP version 6.0.0, MPFR
version 3.1.3, MPC version 1.0.3
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: ae1f57641df2bca5e5adf4e90874d7ef
(then enters an infinite loop.)
>From gcc-bugs-return-521759-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 10 04:57:04 2016
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From: "su at cs dot ucdavis.edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70615] New: ICE on valid code at -O1 and above on x86_64-linux-gnu in add_expr, at tree.c:7870
Date: Sun, 10 Apr 2016 04:57:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70615
Bug ID: 70615
Summary: ICE on valid code at -O1 and above on x86_64-linux-gnu
in add_expr, at tree.c:7870
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: su at cs dot ucdavis.edu
Target Milestone: ---
The following code causes an ICE when compiled with the current GCC trunk at
-O1 and above on x86_64-linux-gnu in both 32-bit and 64-bit modes.
This is a regression from 5.3.x.
$ g++-trunk -v
Using built-in specs.
COLLECT_GCC=g++-trunk
COLLECT_LTO_WRAPPER=/usr/local/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/6.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto
--prefix=/usr/local/gcc-trunk --disable-bootstrap
Thread model: posix
gcc version 6.0.0 20160409 (experimental) [trunk revision 234848] (GCC)
$
$ g++-trunk -O0 small.cpp
$ g++-5.3 -O1 small.cpp
$
$ g++-trunk -O1 small.cpp
small.cpp: In function ‘int main()’:
small.cpp:26:21: internal compiler error: in add_expr, at tree.c:7870
(d->*(D_f) fptr) ();
^
0xff677b inchash::add_expr(tree_node const*, inchash::hash&)
../../gcc-source-trunk/gcc/tree.c:7870
0xff6297 inchash::add_expr(tree_node const*, inchash::hash&)
../../gcc-source-trunk/gcc/tree.c:7882
0xff65f3 inchash::add_expr(tree_node const*, inchash::hash&)
../../gcc-source-trunk/gcc/tree.c:7898
0xff6297 inchash::add_expr(tree_node const*, inchash::hash&)
../../gcc-source-trunk/gcc/tree.c:7882
0xff612f inchash::add_expr(tree_node const*, inchash::hash&)
../../gcc-source-trunk/gcc/tree.c:7843
0xae6148 iterative_hash_expr
../../gcc-source-trunk/gcc/tree.h:4759
0xae6148 gimplify_hasher::hash(gimple_temp_hash_elt const*)
../../gcc-source-trunk/gcc/gimplify.c:11773
0xae6148 hash_table<gimplify_hasher,
xcallocator>::find_slot(gimple_temp_hash_elt* const&, insert_option)
../../gcc-source-trunk/gcc/hash-table.h:414
0xae6148 lookup_tmp_var
../../gcc-source-trunk/gcc/gimplify.c:528
0xae6148 internal_get_tmp_var
../../gcc-source-trunk/gcc/gimplify.c:563
0xade68e gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
../../gcc-source-trunk/gcc/gimplify.c:11213
0xaec501 gimplify_compound_lval
../../gcc-source-trunk/gcc/gimplify.c:2114
0xade94e gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
../../gcc-source-trunk/gcc/gimplify.c:10229
0xadea6c gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
../../gcc-source-trunk/gcc/gimplify.c:10217
0xadecd4 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
../../gcc-source-trunk/gcc/gimplify.c:10992
0xadecd4 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
../../gcc-source-trunk/gcc/gimplify.c:10992
0xaed0b6 gimplify_cond_expr
../../gcc-source-trunk/gcc/gimplify.c:3184
0xae0485 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
../../gcc-source-trunk/gcc/gimplify.c:10233
0xae3616 gimplify_stmt(tree_node**, gimple**)
../../gcc-source-trunk/gcc/gimplify.c:5684
0xaed41c gimplify_cond_expr
../../gcc-source-trunk/gcc/gimplify.c:3143
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
$
-------------------------------------
struct C
{
virtual void f () {}
};
struct B
{
virtual ~B () {}
};
class D : public B, public C
{
public:
D () {}
};
typedef void (C::*FP) ();
typedef void (D::*D_f) ();
int
main ()
{
D *d = new D ();
C *c = d;
const FP fptr = (FP) & D::f;
(d->*(D_f) fptr) ();
return 0;
}
>From gcc-bugs-return-521760-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 10 05:19:51 2016
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From: "su at cs dot ucdavis.edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70616] New: ICE on valid code on x86_64-linux-gnu in build_base_path, at cp/class.c:303
Date: Sun, 10 Apr 2016 05:19:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70616
Bug ID: 70616
Summary: ICE on valid code on x86_64-linux-gnu in
build_base_path, at cp/class.c:303
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: su at cs dot ucdavis.edu
Target Milestone: ---
The following code causes an ICE when compiled with the current GCC trunk (and
4.7.x and later) on x86_64-linux-gnu in both 32-bit and 64-bit modes.
This is a regression from 4.6.x.
$ g++-trunk -v
Using built-in specs.
COLLECT_GCC=g++-trunk
COLLECT_LTO_WRAPPER=/usr/local/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/6.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto
--prefix=/usr/local/gcc-trunk --disable-bootstrap
Thread model: posix
gcc version 6.0.0 20160409 (experimental) [trunk revision 234848] (GCC)
$
$ g++-4.6 small.cpp
$
$ g++-trunk small.cpp
small.cpp: In instantiation of ‘void test() [with int <anonymous> = 0]’:
small.cpp:20:15: required from here
small.cpp:15:9: internal compiler error: in build_base_path, at cp/class.c:303
b->~A ();
~~~~~~^~
0x6f98e9 build_base_path(tree_code, tree_node*, tree_node*, int, int)
../../gcc-source-trunk/gcc/cp/class.c:303
0x612878 build_over_call
../../gcc-source-trunk/gcc/cp/call.c:7396
0x61e735 build_new_method_call_1
../../gcc-source-trunk/gcc/cp/call.c:8419
0x61e735 build_new_method_call(tree_node*, tree_node*, vec<tree_node*, va_gc,
vl_embed>**, tree_node*, int, tree_node**, int)
../../gcc-source-trunk/gcc/cp/call.c:8489
0x68d380 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
../../gcc-source-trunk/gcc/cp/pt.c:16624
0x67db4f tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../gcc-source-trunk/gcc/cp/pt.c:15802
0x67e1f0 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../gcc-source-trunk/gcc/cp/pt.c:15118
0x67d573 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../gcc-source-trunk/gcc/cp/pt.c:15104
0x67f090 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../gcc-source-trunk/gcc/cp/pt.c:15290
0x6c1ef0 instantiate_decl(tree_node*, int, bool)
../../gcc-source-trunk/gcc/cp/pt.c:22014
0x6c8e72 instantiate_pending_templates(int)
../../gcc-source-trunk/gcc/cp/pt.c:22133
0x70aed7 c_parse_final_cleanups()
../../gcc-source-trunk/gcc/cp/decl2.c:4599
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
$
---------------------------------
struct A
{
virtual ~A () {}
};
struct B : public A
{
virtual ~B () {}
};
template < int >
void test ()
{
B *b = new B;
b->~A ();
}
int main ()
{
test < 0 > ();
return 0;
}
>From gcc-bugs-return-521761-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 10 07:02:54 2016
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From: "trippels at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/70614] GCC gets stuck with -O
Date: Sun, 10 Apr 2016 07:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70614
Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-10
CC| |trippels at gcc dot gnu.org
Component|c |tree-optimization
Ever confirmed|0 |1
Known to fail| |4.9.3, 5.3.0, 6.0
--- Comment #1 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Looping in tree-scalar-evolution:
#0 chrec_contains_symbols_defined_in_loop (chrec=0x7ffff6ba7948, loop_nb=1) at
../../gcc/gcc/tree-scalar-evolution.c:402
#1 0x0000000000c02843 in no_evolution_in_loop_p (res=<synthetic pointer>,
loop_num=1, chrec=0x7ffff6ba7948) at ../../gcc/gcc/tree-chrec.h:118
#2 compute_scalar_evolution_in_loop (wrto_loop=0x7ffff728ad20,
def_loop=<optimized out>, ev=<optimized out>) at
../../gcc/gcc/tree-scalar-evolution.c:2002
#3 0x0000000000bfcbb5 in analyze_scalar_evolution_1 (loop=0x7ffff728ad20,
var=0x7ffff6b64bd0, res=0x0) at ../../gcc/gcc/tree-scalar-evolution.c:2048
#4 0x0000000000bfd778 in analyze_scalar_evolution
(loop=loop@entry=0x7ffff728ad20, var=0x7ffff6b64bd0) at
../../gcc/gcc/tree-scalar-evolution.c:2111
#5 0x0000000000bfcd34 in interpret_condition_phi (condition_phi=<optimized
out>, loop=0x7ffff728ad20) at ../../gcc/gcc/tree-scalar-evolution.c:1687
#6 analyze_scalar_evolution_1 (loop=0x7ffff728ad20, var=0x7ffff6ba3828,
res=<optimized out>) at ../../gcc/gcc/tree-scalar-evolution.c:2063
#7 0x0000000000bfcbb5 in analyze_scalar_evolution_1 (loop=0x7ffff728ad20,
var=0x7ffff6b64ca8, res=0x0) at ../../gcc/gcc/tree-scalar-evolution.c:2048
#8 0x0000000000bfd778 in analyze_scalar_evolution
(loop=loop@entry=0x7ffff728ad20, var=0x7ffff6b64ca8) at
../../gcc/gcc/tree-scalar-evolution.c:2111
#9 0x0000000000bfcd34 in interpret_condition_phi (condition_phi=<optimized
out>, loop=0x7ffff728ad20) at ../../gcc/gcc/tree-scalar-evolution.c:1687
#10 analyze_scalar_evolution_1 (loop=0x7ffff728ad20, var=0x7ffff6b9b678,
res=<optimized out>) at ../../gcc/gcc/tree-scalar-evolution.c:2063
...
>From gcc-bugs-return-521762-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 10 09:08:27 2016
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From: "paolo.carlini at oracle dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/69066] SFINAE compilation error on lambda with trailing return type
Date: Sun, 10 Apr 2016 09:08:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69066
Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Severity|major |normal
--- Comment #1 from Paolo Carlini <paolo.carlini at oracle dot com> ---
This works in trunk (for gcc6.0). I'm adding the testcase and closing the bug.
>From gcc-bugs-return-521763-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 10 09:33:38 2016
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From: "paolo at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/69066] SFINAE compilation error on lambda with trailing return type
Date: Sun, 10 Apr 2016 09:33:00 -0000
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--- Comment #2 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> ---
Author: paolo
Date: Sun Apr 10 09:32:46 2016
New Revision: 234869
URL: https://gcc.gnu.org/viewcvs?rev=234869&root=gcc&view=rev
Log:
2016-04-10 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/69066
* g++.dg/cpp1y/pr69066.C: New.
Added:
trunk/gcc/testsuite/g++.dg/cpp1y/pr69066.C
Modified:
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-521764-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 10 09:34:01 2016
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From: "paolo.carlini at oracle dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/69066] SFINAE compilation error on lambda with trailing return type
Date: Sun, 10 Apr 2016 09:34:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |6.0
--- Comment #3 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Done.
>From gcc-bugs-return-521765-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 10 09:49:19 2016
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Subject: [Bug c++/64519] variadic template as the first argument
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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>From gcc-bugs-return-521766-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 10 12:06:07 2016
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Subject: [Bug fortran/58000] Accept OPEN( ... NAME=) with -std=legacy
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--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Patch I am planning to submit
--- ../_clean/gcc/fortran/gfortran.texi 2016-01-04 19:51:09.000000000 +0100
+++ gcc/fortran/gfortran.texi 2016-04-10 14:00:11.000000000 +0200
@@ -2148,6 +2148,7 @@ code that uses them running with the GNU
@c * Omitted arguments in procedure call::
* Alternate complex function syntax::
* Volatile COMMON blocks::
+* OPEN( ... NAME=)::
@end menu
@@ -2355,6 +2356,19 @@ invalid standard Fortran syntax and is n
+@node OPEN( ... NAME=)
+@subsection @code{OPEN( ... NAME=)}
+@cindex @code{NAM}
+
+Some Fortran compilers, including @command{g77}, let the user declare
+@code{OPEN( ... NAME=)}. This is
+invalid standard Fortran syntax and is not supported by
+@command{gfortran}. @code{OPEN( ... NAME=)} should be replaced
+with @code{OPEN( ... FILE=)}.
+
+
+
+@c ---------------------------------------------------------------------
@c ---------------------------------------------------------------------
@c Mixed-Language Programming
@c ---------------------------------------------------------------------
>From gcc-bugs-return-521767-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 10 13:36:51 2016
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Subject: [Bug fortran/68401] improve 'Allocation would exceed memory limit'
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
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--- Comment #9 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Any progress?
>From gcc-bugs-return-521768-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 10 14:31:38 2016
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Subject: [Bug fortran/68600] Inlined MATMUL is too slow.
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--- Comment #12 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
(In reply to Jerry DeLisle from comment #11)
> I was experimenting some more here a few days ago. I really think that
> inlineing shold be disabled above some threshold. On larger arrays, the
> runtime library outperforms inline and right now by default the runtime
> routines are never used unless you provide -fno-frontend-optimize which is
> counter intuitive for the larger arrays.
May I suggest reading the docs? ;-)
`-finline-matmul-limit=N'
When front-end optimiztion is active, some calls to the `MATMUL'
intrinsic function will be inlined. This may result in code size
increase if the size of the matrix cannot be determined at compile
time, as code for both cases is generated. Setting
`-finline-matmul-limit=0' will disable inlining in all cases.
Setting this option with a value of N will produce inline code for
matrices with size up to N. If the matrices involved are not
square, the size comparison is performed using the geometric mean
of the dimensions of the argument and result matrices.
> If one compiles with -march=native -mavx -Ofast etc etc, the inline can do
> fairly well on the larger, however when we update the runtime routines to
> something like shown in comment #8 it will make even more sense to not do
> inline all the time. (Unless of course we further optimize the
> frontend-optimize to do better.)
We can give this option a reasonable default value. The current
status is
The default value for N is the value specified for
`-fblas-matmul-limit' if this option is specified, or unlimitited
otherwise.
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Subject: [Bug testsuite/69807] FAIL: gcc.dg/graphite/scop-19.c scan-tree-dump-times graphite "number of SCoPs: 0" 1
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John David Anglin <danglin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target|x86_64-apple-darwin15 |x86_64-apple-darwin15
| |hppa64-hp-hpux11.11
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-10
CC| |danglin at gcc dot gnu.org
Host|x86_64-apple-darwin15 |x86_64-apple-darwin15
| |hppa64-hp-hpux11.11
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| |hppa64-hp-hpux11.11
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--- Comment #30 from John Paul Adrian Glaubitz <glaubitz at physik dot fu-berlin.de> ---
(In reply to Oleg Endo from comment #28)
> Fixed for GCC 6 and GCC 5.
Ok, great. Matthias just imported r234858 for gcc-5 yesterday. I'll report back
in case the issue persists.
Thanks for your work!
Adrian
>From gcc-bugs-return-521771-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 10 19:33:14 2016
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From: "jan.smets@alcatel-lucent.com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70617] New: internal compiler error: Segmentation fault
Date: Sun, 10 Apr 2016 19:33:00 -0000
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Bug ID: 70617
Summary: internal compiler error: Segmentation fault
Product: gcc
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gcc (GCC) 5.3.1 20160404
Unfortunately I have been unable to get a reduced testcase to upload.
Creduce keeps running in loops and minor modifications to the source make it go
away.
The code is proprietary and therefor I can not share it.
C++ , -O0
file.cpp:1335:1: internal compiler error: Segmentation fault
0xa3dd85 crash_signal
.././gcc-5.3.1/gcc/toplev.c:383
0x6cd7e3 lookup_page_table_entry
.././gcc-5.3.1/gcc/ggc-page.c:659
0x6cd7e3 ggc_set_mark(void const*)
.././gcc-5.3.1/gcc/ggc-page.c:1540
0x638e97 gt_ggc_mx_lang_tree_node(void*)
./gt-cp-tree.h:236
0x63a33c gt_ggc_mx_lang_tree_node(void*)
./gt-cp-tree.h:594
0x63a246 gt_ggc_mx_lang_tree_node(void*)
./gt-cp-tree.h:567
0x63a18d gt_ggc_mx_lang_tree_node(void*)
./gt-cp-tree.h:543
0x63a20e gt_ggc_mx_lang_tree_node(void*)
./gt-cp-tree.h:563
0x63a1d3 gt_ggc_mx_lang_tree_node(void*)
./gt-cp-tree.h:548
0x63a33c gt_ggc_mx_lang_tree_node(void*)
./gt-cp-tree.h:594
0x63a373 gt_ggc_mx_lang_tree_node(void*)
./gt-cp-tree.h:602
0x63a373 gt_ggc_mx_lang_tree_node(void*)
./gt-cp-tree.h:602
0x63a373 gt_ggc_mx_lang_tree_node(void*)
./gt-cp-tree.h:602
0x89db2e gt_ggc_mx_gimple_statement_base(void*)
/toolchains/gcc53/gcc-builddir/gcc/gtype-desc.c:2397
0x89b90d gt_ggc_mx_basic_block_def(void*)
/toolchains/gcc53/gcc-builddir/gcc/gtype-desc.c:2055
0x89d7fd gt_ggc_mx_gimple_statement_base(void*)
/toolchains/gcc53/gcc-builddir/gcc/gtype-desc.c:2428
0x89f2c1 gt_ggc_mx_cgraph_edge(void*)
/toolchains/gcc53/gcc-builddir/gcc/gtype-desc.c:907
0x89f2b3 gt_ggc_mx_cgraph_edge(void*)
/toolchains/gcc53/gcc-builddir/gcc/gtype-desc.c:906
0x89f2b3 gt_ggc_mx_cgraph_edge(void*)
/toolchains/gcc53/gcc-builddir/gcc/gtype-desc.c:906
0x89eded gt_ggc_mx_symtab_node(void*)
/toolchains/gcc53/gcc-builddir/gcc/gtype-desc.c:1712
Please submit a full bug report,
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Subject: [Bug c++/69095] internal compiler error: in dependent_type_p, at cp/pt.c:19399
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--- Comment #3 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Mine.
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Subject: [Bug c++/70617] internal compiler error: Segmentation fault
Date: Sun, 10 Apr 2016 19:57:00 -0000
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--- Comment #1 from Jan Smets <jan.smets@alcatel-lucent.com> ---
with checking=all
../pchip_code/vfp_combined_c.cpp:85:1: internal compiler error: Segmentation
fault
0xd42735 crash_signal
.././gcc-5.3.1/gcc/toplev.c:383
0x732f37 c_tree_chain_next
.././gcc-5.3.1/gcc/c-family/c-common.h:1269
0x732f37 gt_ggc_mx_lang_tree_node(void*)
./gt-cp-tree.h:237
0x734651 gt_ggc_mx_lang_tree_node(void*)
./gt-cp-tree.h:567
0x734598 gt_ggc_mx_lang_tree_node(void*)
./gt-cp-tree.h:543
0x734619 gt_ggc_mx_lang_tree_node(void*)
./gt-cp-tree.h:563
0x7345de gt_ggc_mx_lang_tree_node(void*)
./gt-cp-tree.h:548
0x733aa8 gt_ggc_mx_lang_tree_node(void*)
./gt-cp-tree.h:382
0x734673 gt_ggc_mx_lang_tree_node(void*)
./gt-cp-tree.h:569
0x734619 gt_ggc_mx_lang_tree_node(void*)
./gt-cp-tree.h:563
0x734192 gt_ggc_mx_lang_tree_node(void*)
./gt-cp-tree.h:437
0x75ede5 gt_ggc_mx_cp_binding_level(void*)
./gt-cp-name-lookup.h:64
0x733395 gt_ggc_mx_lang_tree_node(void*)
./gt-cp-tree.h:758
0x7341ae gt_ggc_mx_lang_tree_node(void*)
./gt-cp-tree.h:439
0x734651 gt_ggc_mx_lang_tree_node(void*)
./gt-cp-tree.h:567
0x733aa8 gt_ggc_mx_lang_tree_node(void*)
./gt-cp-tree.h:382
0x734673 gt_ggc_mx_lang_tree_node(void*)
./gt-cp-tree.h:569
0xa34e55 ggc_mark_root_tab
.././gcc-5.3.1/gcc/ggc-common.c:81
0xa34e55 ggc_mark_roots()
.././gcc-5.3.1/gcc/ggc-common.c:98
0x8269ff ggc_collect()
.././gcc-5.3.1/gcc/ggc-page.c:2199
Please submit a full bug report,
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Subject: [Bug c++/70617] internal compiler error: Segmentation fault
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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> ---
Try to reduce with --param ggc-min-expand=0 --param ggc-min-heapsize=0
(although it will be slow).
>From gcc-bugs-return-521775-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 10 20:30:01 2016
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Subject: [Bug c++/36159] C++ compiler should issue a warning with missing new operator
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--- Comment #18 from Martin Sebor <msebor at gcc dot gnu.org> ---
The link works for me. An older version of the paper is here:
http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2012/n3396.htm
If that doesn't work for you either try searching for the paper titled Dynamic
memory allocation for over-aligned data by Clark Nelson.
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Subject: [Bug c++/70617] internal compiler error: Segmentation fault
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--- Comment #3 from Jan Smets <jan.smets@alcatel-lucent.com> ---
output is the same
>From gcc-bugs-return-521777-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 10 20:34:28 2016
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Subject: [Bug c++/70617] internal compiler error: Segmentation fault
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Yeah, but with the always collect options presumably it might be easier to
reduce the testcase more, so creduce and/or delta might be successful on it.
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From: "andi-gcc at firstfloor dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/70618] New: better error messages for missing/too many arguments
Date: Sun, 10 Apr 2016 20:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70618
Bug ID: 70618
Summary: better error messages for missing/too many arguments
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: enhancement
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
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When doing API refactorings it is reasonable common to have too many or not
enough arguments in function calls. The existing errors in gcc/g++ are not very
good for that, i get at least two consecutive ones and they are not very clear.
Since that is common it would be much better if the compiler could compute the
minimum edit distance to the real prototype (or the nearest for C++) and then
directl ysuggest what arguments are missing or which are too many.
void foo(int *xp, float *yp, double *zp)
{
}
int x;
float y;
double z;
short k;
void f2(void)
{
foo(&y, &z); /* forgot x */
foo(&x, &z); /* forgot y */
foo(&x, &z); /* forgot z */
foo(&x); /* forgot y and z */
foo(&z); /* forgot x and y*/
foo(&x, &y, &z, &x); /* x too many at end */
foo(&x, &x, &y, &z); /* x too man at start */
foo(&x, &y, &y, &z); /* y too much in the middle */
foo(&x, &y, &k, &z); /* different y in middle */
foo(&k, &x, &y, &z); /* different x at start */
foo(&x, &y, &z, &k); /* different x at end */
}
gcc/tsrc/tmissing.c: In function ‘f2’:
gcc/tsrc/tmissing.c:14:6: warning: passing argument 1 of ‘foo’ from
incompatible pointer type [-Wincompatible-pointer-types]
foo(&y, &z); /* forgot x */
^
gcc/tsrc/tmissing.c:3:6: note: expected ‘int *’ but argument is of type ‘float
*’
void foo(int *xp, float *yp, double *zp)
^
gcc/tsrc/tmissing.c:14:10: warning: passing argument 2 of ‘foo’ from
incompatible pointer type [-Wincompatible-pointer-types]
foo(&y, &z); /* forgot x */
^
gcc/tsrc/tmissing.c:3:6: note: expected ‘float *’ but argument is of type
‘double *’
void foo(int *xp, float *yp, double *zp)
^
gcc/tsrc/tmissing.c:14:2: error: too few arguments to function ‘foo’
foo(&y, &z); /* forgot x */
^
gcc/tsrc/tmissing.c:3:6: note: declared here
void foo(int *xp, float *yp, double *zp)
^
gcc/tsrc/tmissing.c:15:10: warning: passing argument 2 of ‘foo’ from
incompatible pointer type [-Wincompatible-pointer-types]
foo(&x, &z); /* forgot y */
^
gcc/tsrc/tmissing.c:3:6: note: expected ‘float *’ but argument is of type
‘double *’
void foo(int *xp, float *yp, double *zp)
^
gcc/tsrc/tmissing.c:15:2: error: too few arguments to function ‘foo’
foo(&x, &z); /* forgot y */
>From gcc-bugs-return-521779-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 10 20:47:32 2016
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From: "ch3root at openwall dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/70619] New: Wrong warning with VLA, comma and sizeof
Date: Sun, 10 Apr 2016 20:47:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70619
Bug ID: 70619
Summary: Wrong warning with VLA, comma and sizeof
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Assignee: unassigned at gcc dot gnu.org
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Compiling the program:
int main()
{
int a[1][(0, 1)];
int i = 0;
sizeof a[i++];
}
gives such warnings:
$ gcc -Wall example.c
example.c: In function ‘main’:
example.c:3:14: warning: left-hand operand of comma expression has no effect
[-Wunused-value]
int a[1][(0, 1)];
^
example.c:5:10: warning: right-hand operand of comma expression has no effect
[-Wunused-value]
sizeof a[i++];
~~~~~~~^~~~~~
The first one is fine but the second one is wrong and confusing.
>From gcc-bugs-return-521780-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 10 21:27:40 2016
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Subject: [Bug c++/70610] [6 regression] error: invalid initialization of non-const reference of type
Date: Sun, 10 Apr 2016 21:27:00 -0000
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--- Comment #1 from Patrick Palka <ppalka at gcc dot gnu.org> ---
The problem is that during template processing we think the operand to the
unary + is an lvalue (because it's wrapped in a NON_DEPENDENT_EXPR node) and so
during overload resolution we select the non-const overload of operator+. Then
during instantiation, since the operand is actually an rvalue we reject the
function call since it requires the operand to be an lvalue.
>From gcc-bugs-return-521781-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 10 21:34:35 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70610] [6 regression] error: invalid initialization of non-const reference of type
Date: Sun, 10 Apr 2016 21:34:00 -0000
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--- Comment #2 from Patrick Palka <ppalka at gcc dot gnu.org> ---
This general issue about the unconditional lvalue-ness of NON_DEPENDENT_EXPR
existed before my patch for PR c++/21802 though. For example, ere's a test
case that should compile cleanly but doesn't since at least g++ 4.4 (-std=c++98
is required) for basically the same reason:
struct A { };
void operator+ (const A &, A &);
void operator+ (A &, const A &);
void operator+ (const A &, const A &);
template <typename T>
void
foo ()
{
A () + A ();
}
unary_plus.C: In function ‘void foo()’:
unary_plus.C:11:8: error: ambiguous overload for ‘operator+’ (operand types are
‘A’ and ‘A’)
A () + A ();
~~~~~^~~~~~
unary_plus.C:3:6: note: candidate: void operator+(const A&, A&)
void operator+ (const A &, A &);
^~~~~~~~
unary_plus.C:4:6: note: candidate: void operator+(A&, const A&)
void operator+ (A &, const A &);
^~~~~~~~
unary_plus.C:5:6: note: candidate: void operator+(const A&, const A&)
void operator+ (const A &, const A &);
^~~~~~~~
>From gcc-bugs-return-521782-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 10 21:40:14 2016
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Subject: [Bug c++/70610] [6 regression] error: invalid initialization of non-const reference of type
Date: Sun, 10 Apr 2016 21:40:00 -0000
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--- Comment #3 from Patrick Palka <ppalka at gcc dot gnu.org> ---
Not limited to operator overloads either:
void bar (const int &, int &);
void bar (int &, const int &);
void bar (const int &, const int &);
int a, b;
template <typename T>
void
foo ()
{
bar (a + 1, b + 2);
}
>From gcc-bugs-return-521783-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 10 22:04:07 2016
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From: "su at cs dot ucdavis.edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70620] New: possible wrong code at -Os on x86_64-linux-gnu for C++ code with multiple inheritance and casting
Date: Sun, 10 Apr 2016 22:04:00 -0000
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Bug ID: 70620
Summary: possible wrong code at -Os on x86_64-linux-gnu for C++
code with multiple inheritance and casting
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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The current gcc trunk possibly miscompiles the following code on
x86_64-linux-gnu at -Os in both 32-bit and 64-bit modes.
It also affects 5.x at -Os and above and seems to be a regression from 4.9.x.
$ g++-trunk -v
Using built-in specs.
COLLECT_GCC=g++-trunk
COLLECT_LTO_WRAPPER=/usr/local/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/6.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto
--prefix=/usr/local/gcc-trunk --disable-bootstrap
Thread model: posix
gcc version 6.0.0 20160410 (experimental) [trunk revision 234869] (GCC)
$
$ g++-trunk -O1 small.cpp; ./a.out; echo $?
0
$ g++-4.9 -Os small.cpp; ./a.out; echo $?
0
$
$ g++-trunk -Os small.cpp
$ ./a.out
Segmentation fault (core dumped)
$
--------------------------------------------
int a;
class A
{
public:
virtual ~A () {}
};
class B1 : public A {};
class B2 : public A {};
class C
{
public:
virtual ~C () {}
};
class D : public C, public B2
{
public:
virtual ~D () {}
};
class E : public B1, virtual public D
{
public:
virtual ~E () { a = 0; }
};
int
main ()
{
a = 1;
delete (D *) (B1 *) new E; // Does this lead to undefined behavior?
if (a)
return 1;
return 0;
}
>From gcc-bugs-return-521784-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 10 23:10:54 2016
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From: "su at cs dot ucdavis.edu" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70621] New: ICE on invalid code at -O1 and above on x86_64-linux-gnu in record_reference, at cgraphbuild.c:64
Date: Sun, 10 Apr 2016 23:10:00 -0000
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Bug ID: 70621
Summary: ICE on invalid code at -O1 and above on
x86_64-linux-gnu in record_reference, at
cgraphbuild.c:64
Product: gcc
Version: 6.0
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Target Milestone: ---
The following code causes an ICE when compiled with the current GCC trunk at
-O1 and above on x86_64-linux-gnu in both 32-bit and 64-bit modes.
This is a regression from 5.3.x.
$ g++-trunk -v
Using built-in specs.
COLLECT_GCC=g++-trunk
COLLECT_LTO_WRAPPER=/usr/local/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/6.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto
--prefix=/usr/local/gcc-trunk --disable-bootstrap
Thread model: posix
gcc version 6.0.0 20160410 (experimental) [trunk revision 234869] (GCC)
$
$ g++-trunk -O0 -c small.cpp
small.cpp:30:12: error: conflicting declaration ‘const B D::e’
const B D::e = { 0, (fp) &E::foo };
^
small.cpp:20:12: note: previous declaration as ‘B D::e’
static B e;
^
small.cpp:30:12: error: declaration of ‘B D::e’ outside of class is not
definition [-fpermissive]
const B D::e = { 0, (fp) &E::foo };
^
$
$ g++-5.3 -O1 -c small.cpp
small.cpp:30:12: error: conflicting declaration ‘const B D::e’
const B D::e = { 0, (fp) &E::foo };
^
small.cpp:20:12: note: previous declaration as ‘B D::e’
static B e;
^
small.cpp:30:12: error: declaration of ‘B D::e’ outside of class is not
definition [-fpermissive]
const B D::e = { 0, (fp) &E::foo };
^
$
$ g++-trunk -O1 -c small.cpp
small.cpp:30:12: error: conflicting declaration ‘const B D::e’
const B D::e = { 0, (fp) &E::foo };
^
small.cpp:20:12: note: previous declaration as ‘B D::e’
static B e;
^
small.cpp:30:12: error: declaration of ‘B D::e’ outside of class is not
definition [-fpermissive]
const B D::e = { 0, (fp) &E::foo };
^
cc1plus: internal compiler error: in record_reference, at cgraphbuild.c:64
0x95ef53 record_reference
../../gcc-source-trunk/gcc/cgraphbuild.c:64
0x100fec4 walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*),
void*, hash_set<tree_node*, default_hash_traits<tree_node*> >*, tree_node*
(*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*), void*,
hash_set<tree_node*, default_hash_traits<tree_node*> >*))
../../gcc-source-trunk/gcc/tree.c:11531
0x1010474 walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*),
void*, hash_set<tree_node*, default_hash_traits<tree_node*> >*, tree_node*
(*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*), void*,
hash_set<tree_node*, default_hash_traits<tree_node*> >*))
../../gcc-source-trunk/gcc/tree.c:11848
0x1010474 walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*),
void*, hash_set<tree_node*, default_hash_traits<tree_node*> >*, tree_node*
(*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*), void*,
hash_set<tree_node*, default_hash_traits<tree_node*> >*))
../../gcc-source-trunk/gcc/tree.c:11848
0x96008a record_references_in_initializer(tree_node*, bool)
../../gcc-source-trunk/gcc/cgraphbuild.c:404
0x1051957 varpool_node::analyze()
../../gcc-source-trunk/gcc/varpool.c:526
0x966359 analyze_functions
../../gcc-source-trunk/gcc/cgraphunit.c:1133
0x966f98 symbol_table::finalize_compilation_unit()
../../gcc-source-trunk/gcc/cgraphunit.c:2542
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
$
------------------------------------------
class A;
typedef void (A::*fp) (void);
struct B
{
int n;
fp f;
};
struct C
{
const C *c;
const B b;
};
class D
{
public:
static B e;
static C m;
};
class E : public D
{
public:
void foo ();
};
// OK: B D::e = { 0, (fp) &E::foo };
const B D::e = { 0, (fp) &E::foo };
C D::m = { &D::m, E::e };
>From gcc-bugs-return-521785-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 10 23:39:29 2016
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Subject: [Bug fortran/58000] Accept OPEN( ... NAME=) with -std=legacy
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Jerry DeLisle <jvdelisle at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jvdelisle at gcc dot gnu.org
--- Comment #4 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
(In reply to Dominique d'Humieres from comment #3)
> Patch I am planning to submit
>
> --- ../_clean/gcc/fortran/gfortran.texi 2016-01-04 19:51:09.000000000 +0100
> +++ gcc/fortran/gfortran.texi 2016-04-10 14:00:11.000000000 +0200
> @@ -2148,6 +2148,7 @@ code that uses them running with the GNU
> @c * Omitted arguments in procedure call::
> * Alternate complex function syntax::
> * Volatile COMMON blocks::
> +* OPEN( ... NAME=)::
> @end menu
>
>
> @@ -2355,6 +2356,19 @@ invalid standard Fortran syntax and is n
>
>
>
> +@node OPEN( ... NAME=)
> +@subsection @code{OPEN( ... NAME=)}
> +@cindex @code{NAM}
> +
> +Some Fortran compilers, including @command{g77}, let the user declare
> +@code{OPEN( ... NAME=)}. This is
> +invalid standard Fortran syntax and is not supported by
> +@command{gfortran}. @code{OPEN( ... NAME=)} should be replaced
> +with @code{OPEN( ... FILE=)}.
> +
> +
> +
> +@c ---------------------------------------------------------------------
> @c ---------------------------------------------------------------------
> @c Mixed-Language Programming
> @c ---------------------------------------------------------------------
Approved! Please proceed.
>From gcc-bugs-return-521786-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 10 23:51:43 2016
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Subject: [Bug fortran/51820] [doc] underscoring documentation incorrect
Date: Sun, 10 Apr 2016 23:51:00 -0000
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Jerry DeLisle <jvdelisle at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jvdelisle at gcc dot gnu.org
--- Comment #3 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
(In reply to Dominique d'Humieres from comment #2)
> Is the following patch a step in the right direction?
---snip---
This all looks good to me except the following:
> @item -fsecond-underscore
> @opindex @code{fsecond-underscore}
> @@ -1355,8 +1365,7 @@ By default, GNU Fortran appends an under
> names. If this option is used GNU Fortran appends two
> underscores to names with underscores and one underscore to external names
> with no underscores. GNU Fortran also appends two underscores to
> -internal names with underscores to avoid naming collisions with external
> -names.
> +internal names with underscores.
>
> This option has no effect if @option{-fno-underscoring} is
> in effect. It is implied by the @option{-ff2c} option.
It is confusing to me about names with underscores. For example, on internal
names, does foo_ become foo__ or foo___, appending one underscore to the
existing for a total of two or appending two more to the existing for a total
of three underscores. I think the wording needs to be a little more concise.
>From gcc-bugs-return-521787-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 10 23:53:39 2016
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Subject: [Bug fortran/60751] Extra comma in WRITE statement not diagnosed
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--- Comment #18 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
(In reply to Dominique d'Humieres from comment #17)
> Note that the extra comma is used in the following tests:
>
> gfortran.dg/array_constructor_49.f90
> gfortran.dg/integer_exponentiation_6.F90
> gfortran.dg/graphite/pr38083.f90
>
> Any reason to keep it?
No, and I am planning to fix the diagnostic on this.
>From gcc-bugs-return-521788-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 00:13:52 2016
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Subject: [Bug fortran/67039] Documentation of pseudorandom number intrinsics is incorrect
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Jerry DeLisle <jvdelisle at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jvdelisle at gcc dot gnu.org
--- Comment #7 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
(In reply to Dominique d'Humieres from comment #6)
> I am planning to submit the following patch
---snip---
I think this word should be singular.
> +@code{RANDOM_SEED} to initialize the pseudo-random numbers <===== no 's'
> +generator and @code{RANDOM_NUMBER} to generate pseudo-random numbers.
> +These subroutines should be used in new codes.
Even if internally there may be multiple 'generators' involved, from the user
perspective it is just one generator.
>From gcc-bugs-return-521789-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 01:02:49 2016
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Subject: [Bug c++/70622] New: auto specifier don't deduce value type and its pointer type within single declaration.
Date: Mon, 11 Apr 2016 01:02:00 -0000
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Bug ID: 70622
Summary: auto specifier don't deduce value type and its pointer
type within single declaration.
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GCC 6 doesn't compile following code, but others (e.g. GCC 5, clang) do.
```
int main()
{
auto x = 0, *y = &x;
}
```
GCC 6 20160410: http://melpon.org/wandbox/permlink/kBVR4JiKMCMnfWe6
GCC 5.3.0: http://melpon.org/wandbox/permlink/61qqamq6MeInqgXF
clang 3.8.0: http://melpon.org/wandbox/permlink/qdw2lwZE17Rf4Ioz
[dcl.spec.auto]/4 indicates that code should be well-formed.
>From gcc-bugs-return-521790-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 01:28:03 2016
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Subject: [Bug fortran/52884] double precision constants promoted to 16 byte by -fdefault-real-8
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----------------------------------------------------------------------------
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--- Comment #3 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
May I suggest the following wording:
-fdefault-real-8
Set the default real type to an 8 byte wide type. This option
also affects the kind of non-double real constants like 1.0.
This option promotes the default width of DOUBLE PRECISION
and double real constants like 1.d0 to 16 bytes if possible.
If -fdefault-double-8 is given along with -fdefault-real-8,
DOUBLE PRECISION and double real constants are not promoted.
Note, -fdefault-real-8, does not promote variables with explicit
kind declarations.
-fdefault-double-8
Set the DOUBLE PRECISION type to an 8 byte wide type. Do nothing
if this is already the default. This option prevents -fdefault-real-8
from promoting DOUBLE PRECISION and double real constants like 1.d0
to 16 bytes.
>From gcc-bugs-return-521791-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 01:50:00 2016
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Subject: [Bug sanitizer/65479] sanitizer stack trace missing frames past #0 on powerpc64
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--- Comment #14 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
I wonder if this is just support that hasn't been updated in the GCC copy of
libsanitizer. I recall fixing this bug (or one very similar to it) on the
Clang side in 2015. There is some Power-specific logic in there for doing the
stack unwinding. I will try to dig that information up and compare the two.
>From gcc-bugs-return-521792-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 03:43:36 2016
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Subject: [Bug tree-optimization/70623] New: [6 Regression] ICE in compute_antic at -O2
Date: Mon, 11 Apr 2016 03:43:00 -0000
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Bug ID: 70623
Summary: [6 Regression] ICE in compute_antic at -O2
Product: gcc
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gcc-6.0.0-alpha20160403 and gcc-6.0.0-alpha20160410 snippets ICE when compiling
the following reduced snippet at -O2:
int nm;
int *av;
void
h9(void)
{
for (;;) {
int wk, rc;
int **ptr_10 = &av;
if (*av != 0) {
}
u4:
wk = 0;
for (rc = 0; rc < 3; ++rc) {
int bc = (rc ? rc : nm);
int ud = bc ? (*av ? 0 : rc) : 1;
if (ud != 0) {
if (*av != 0)
goto u4;
for (;;) {
}
}
}
while (wk < 3) {
av = **ptr_10;
++wk;
}
}
}
% gcc-6.0.0-alpha20160410 -c -O2 oqqpkhyr.c
oqqpkhyr.c: In function 'h9':
oqqpkhyr.c:25:10: warning: assignment makes pointer from integer without a cast
[-Wint-conversion]
av = **ptr_10;
^
oqqpkhyr.c:5:1: internal compiler error: in compute_antic, at
tree-ssa-pre.c:2403
h9(void)
^~
gcc-6.0.0-alpha20160110 doesn't ICE for me.
>From gcc-bugs-return-521793-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 05:11:55 2016
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From: "jvdelisle at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/68600] Inlined MATMUL is too slow.
Date: Mon, 11 Apr 2016 05:11:00 -0000
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--- Comment #13 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
(In reply to Thomas Koenig from comment #12)
> (In reply to Jerry DeLisle from comment #11)
---snip--
>
> May I suggest reading the docs? ;-)
>
--- snip ---
> The default value for N is the value specified for
> `-fblas-matmul-limit' if this option is specified, or unlimitited
> otherwise.
Oh gosh!, Sorry about that Thomas. I just did not see it. And I was even
looking for it because I thought it was there! This is excellent because I am
working on a modification to the run-time libraries. This will give us
something like:
====================================
Matmul
fixed
Size Loops explicit NewMatmul
====================================
16 2000 1.496 1.719
32 2000 2.427 1.784
64 2000 1.343 1.967
128 2000 1.657 2.113
256 477 2.660 2.185
512 59 2.027 2.195
1024 7 1.530 2.208
2048 1 1.516 2.210
On this particular machine, the inlining at high levels of optimization has
some sweet spots at size of 32 x 32 for example, so allowing the tuning is
essential depending on users application.
>From gcc-bugs-return-521794-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 07:27:26 2016
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Subject: [Bug bootstrap/70173] make distclean: leaves stage_final and libcc1/compiler-name.h
Date: Mon, 11 Apr 2016 07:27:00 -0000
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--- Comment #6 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Author: segher
Date: Mon Apr 11 07:26:36 2016
New Revision: 234874
URL: https://gcc.gnu.org/viewcvs?rev=234874&root=gcc&view=rev
Log:
libcc1: Clean compiler-name.h (PR70173)
Since the file is generated from a Makefile fragment, it needs to be
added to MOSTLYCLEANFILES. The directory itself is still not deleted
(just like the gnattools and gotools directories).
2016-04-11 Segher Boessenkool <segher@kernel.crashing.org>
libcc1/
PR bootstrap/70173
* Makefile.am (MOSTLYCLEANFILES): New, add compiler-name.h .
(compiler-name.h): Shorten recipe so that it fits the line.
* Makefile.in: Regenerate.
Modified:
trunk/libcc1/ChangeLog
trunk/libcc1/Makefile.am
trunk/libcc1/Makefile.in
>From gcc-bugs-return-521795-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 07:58:33 2016
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Subject: [Bug tree-optimization/70623] [6 Regression] ICE in compute_antic at -O2
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----------------------------------------------------------------------------
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r226801.
>From gcc-bugs-return-521796-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 08:03:23 2016
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Subject: [Bug c++/70622] [6 Regression] auto specifier don't deduce value type and its pointer type within single declaration.
Date: Mon, 11 Apr 2016 08:03:00 -0000
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What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org,
| |jason at gcc dot gnu.org
Target Milestone|--- |6.0
Summary|auto specifier don't deduce |[6 Regression] auto
|value type and its pointer |specifier don't deduce
|type within single |value type and its pointer
|declaration. |type within single
| |declaration.
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r231349 aka PR68597 fix.
>From gcc-bugs-return-521797-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 08:07:54 2016
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Subject: [Bug c++/70621] [6 Regression] ICE on invalid code at -O1 and above on x86_64-linux-gnu in record_reference, at cgraphbuild.c:64
Date: Mon, 11 Apr 2016 08:07:00 -0000
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What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Status|UNCONFIRMED |NEW
Keywords| |error-recovery
Last reconfirmed| |2016-04-11
CC| |jakub at gcc dot gnu.org
Ever confirmed|0 |1
Summary|ICE on invalid code at -O1 |[6 Regression] ICE on
|and above on |invalid code at -O1 and
|x86_64-linux-gnu in |above on x86_64-linux-gnu
|record_reference, at |in record_reference, at
|cgraphbuild.c:64 |cgraphbuild.c:64
Target Milestone|--- |6.0
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with my r232278 aka PR68511 and PR69213 fix.
>From gcc-bugs-return-521798-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 08:14:42 2016
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Subject: [Bug c++/70620] possible wrong code at -Os on x86_64-linux-gnu for C++ code with multiple inheritance and casting
Date: Mon, 11 Apr 2016 08:14:00 -0000
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
This changed behavior with r215569. I'd be really surprised if this is not UB,
but in C++ nothing can really surprise me.
>From gcc-bugs-return-521799-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 08:19:24 2016
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Subject: [Bug c++/70616] [4.9/5/6 Regression] ICE on valid code on x86_64-linux-gnu in build_base_path, at cp/class.c:303
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What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-11
CC| |jakub at gcc dot gnu.org,
| |jason at gcc dot gnu.org
Target Milestone|--- |4.9.4
Summary|ICE on valid code on |[4.9/5/6 Regression] ICE on
|x86_64-linux-gnu in |valid code on
|build_base_path, at |x86_64-linux-gnu in
|cp/class.c:303 |build_base_path, at
| |cp/class.c:303
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r185945.
>From gcc-bugs-return-521800-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 08:25:24 2016
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Subject: [Bug c++/70615] [6 Regression] ICE on valid code at -O1 and above on x86_64-linux-gnu in add_expr, at tree.c:7870
Date: Mon, 11 Apr 2016 08:25:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-11
CC| |jakub at gcc dot gnu.org,
| |jason at gcc dot gnu.org
Target Milestone|--- |6.0
Summary|ICE on valid code at -O1 |[6 Regression] ICE on valid
|and above on |code at -O1 and above on
|x86_64-linux-gnu in |x86_64-linux-gnu in
|add_expr, at tree.c:7870 |add_expr, at tree.c:7870
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r231197.
>From gcc-bugs-return-521801-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 08:26:34 2016
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/70577] [6 regression] tree-ssa/prefetch-5.c scan-tree-dump-times aprefetch failures
Date: Mon, 11 Apr 2016 08:26:00 -0000
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--- Comment #7 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #6)
> I think -1 is the right answer, these are flexible array-like arrays,
> where one could e.g.
> struct tail0 *p = malloc (sizeof (struct tail0) + 131072 * sizeof (int));
> initialize (p);
> loop0 (131072, p);
> and similarly for tail1/loop1.
Ah, you are right, thanks for explanation.
>From gcc-bugs-return-521802-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 08:34:22 2016
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Subject: [Bug tree-optimization/70577] [6 regression] tree-ssa/prefetch-5.c scan-tree-dump-times aprefetch failures
Date: Mon, 11 Apr 2016 08:34:00 -0000
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Kirill Yukhin <kyukhin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |kyukhin at gcc dot gnu.org
--- Comment #8 from Kirill Yukhin <kyukhin at gcc dot gnu.org> ---
This commit caused miscompare of spec2000/178.galgel on -march=skylake-avx512
(-Ofast -flto -funroll-loops):
Newton iteration # 0 Maximal derivative = 0.1526E-07
Newton iteration # 0 Maximal derivative = 0.3901E-07
>From gcc-bugs-return-521803-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 08:35:09 2016
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Subject: [Bug sanitizer/70624] New: [6 Regression] Several hundred asan failures with 6.0 on x86_64-apple-darwin10.8
Date: Mon, 11 Apr 2016 08:35:00 -0000
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Bug ID: 70624
Summary: [6 Regression] Several hundred asan failures with 6.0
on x86_64-apple-darwin10.8
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: sanitizer
Assignee: unassigned at gcc dot gnu.org
Reporter: dominiq at lps dot ens.fr
CC: chefmax at gcc dot gnu.org, dodji at gcc dot gnu.org,
dvyukov at gcc dot gnu.org, jakub at gcc dot gnu.org,
kcc at gcc dot gnu.org
Target Milestone: ---
Host: x86_64-apple-darwin10.8
Target: x86_64-apple-darwin10.8
Build: x86_64-apple-darwin10.8
On x86_64-apple-darwin10.8 I get several hundred asan failures with 6.0 (see
https://gcc.gnu.org/ml/gcc-testresults/2016-04/msg01013.html). Most (if not
all) of them are of the kind
dyld: Symbol not found: _dyldVersionNumber
Referenced from:
/opt/gcc/build_c/x86_64-apple-darwin10.8.0/i386/libsanitizer/asan/.libs/libasan.3.dylib
Expected in: flat namespace
in
/opt/gcc/build_c/x86_64-apple-darwin10.8.0/i386/libsanitizer/asan/.libs/libasan.3.dylib
AFAICT they are related to revision r229111
+bool DyldNeedsEnvVariable() {
+ // If running on OS X 10.11+ or iOS 9.0+, dyld will interpose even if
+ // DYLD_INSERT_LIBRARIES is not set. However, checking OS version via
+ // GetMacosVersion() doesn't work for the simulator. Let's instead check
+ // `dyldVersionNumber`, which is exported by dyld, against a known version
+ // number from the first OS release where this appeared.
+ return dyldVersionNumber < kMinDyldVersionWithAutoInterposition;
+}
+
>From gcc-bugs-return-521804-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 08:42:54 2016
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Subject: [Bug tree-optimization/70614] [4.9/5/6 Regression] GCC gets stuck with -O
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
Target Milestone|--- |4.9.4
Summary|GCC gets stuck with -O |[4.9/5/6 Regression] GCC
| |gets stuck with -O
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Most likely started with r191232 (r191230 works, r191243 already spends lots of
time in SCEV).
>From gcc-bugs-return-521805-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 08:47:25 2016
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Subject: [Bug c++/70610] [6 regression] error: invalid initialization of non-const reference of type
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org,
| |jason at gcc dot gnu.org
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
#c3 changed behavior (started to be rejected) with r181174.
>From gcc-bugs-return-521806-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 09:10:46 2016
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Subject: [Bug sanitizer/70624] [6 Regression] Several hundred asan failures with 6.0 on x86_64-apple-darwin10.8
Date: Mon, 11 Apr 2016 09:10:00 -0000
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
That is not very recent change. Has Darwin itself changed incompatibly?
>From gcc-bugs-return-521807-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 09:12:05 2016
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Subject: [Bug sanitizer/70624] [6 Regression] Several hundred asan failures with 6.0 on x86_64-apple-darwin10.8
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Maxim Ostapenko <m.ostapenko at samsung dot com> changed:
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--- Comment #2 from Maxim Ostapenko <m.ostapenko at samsung dot com> ---
Darwin 10.8 seems to be quite an old system (June 23, 2011), perhaps it's
dynamic linker (dyld) just haven't dyldVersionNumber symbol? Anyway, this is a
library issue and perhaps it should go to sanitizer bugzilla
(https://github.com/google/sanitizers/issues).
>From gcc-bugs-return-521808-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 10:03:20 2016
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/70624] [6 Regression] Several hundred asan failures with 6.0 on x86_64-apple-darwin10.8
Date: Mon, 11 Apr 2016 10:03:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70624
Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-11
Ever confirmed|0 |1
--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Darwin 10.8 seems to be quite an old system (June 23, 2011),
Indeed.
> perhaps it's dynamic linker (dyld) just haven't dyldVersionNumber symbol?
It's my understanding.
> Anyway, this is a library issue and perhaps it should go to sanitizer bugzilla
> (https://github.com/google/sanitizers/issues).
Done, #669.
>From gcc-bugs-return-521809-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 10:15:58 2016
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Subject: [Bug target/70133] AArch64 -mtune=native generates improperly formatted -march parameters
Date: Mon, 11 Apr 2016 10:15:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70133
--- Comment #10 from James Greenhalgh <jgreenhalgh at gcc dot gnu.org> ---
Author: jgreenhalgh
Date: Mon Apr 11 10:14:59 2016
New Revision: 234876
URL: https://gcc.gnu.org/viewcvs?rev=234876&root=gcc&view=rev
Log:
[Patch AArch64 2/3] Rework the code to print extension strings (pr70133)
gcc/
PR target/70133
* config/aarch64/aarch64-common.c (aarch64_option_extension): Keep
track of a canonical flag name.
(all_extensions): Likewise.
(arch_to_arch_name): Also track extension flags enabled by the arch.
(all_architectures): Likewise.
(aarch64_parse_extension): Move to here.
(aarch64_get_extension_string_for_isa_flags): Take a new argument,
rework.
(aarch64_rewrite_selected_cpu): Update for above change.
* config/aarch64/aarch64-option-extensions.def: Rework the way flags
are handled, such that the single explicit value enabled by an
extension is kept seperate from the implicit values it also enables.
* config/aarch64/aarch64-protos.h (aarch64_parse_opt_result): Move
to here.
(aarch64_parse_extension): New.
* config/aarch64/aarch64.c (aarch64_parse_opt_result): Move from
here to config/aarch64/aarch64-protos.h.
(aarch64_parse_extension): Move from here to
common/config/aarch64/aarch64-common.c.
(aarch64_option_print): Update.
(aarch64_declare_function_name): Likewise.
(aarch64_start_file): Likewise.
* config/aarch64/driver-aarch64.c (arch_extension): Keep track of
the canonical flag for extensions.
* config.gcc (aarch64*-*-*): Extend regex for capturing extension
flags.
gcc/testsuite/
PR target/70133
* gcc.target/aarch64/mgeneral-regs_4.c: Fix expected output.
* gcc.target/aarch64/target_attr_15.c: Likewise.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/common/config/aarch64/aarch64-common.c
trunk/gcc/config.gcc
trunk/gcc/config/aarch64/aarch64-option-extensions.def
trunk/gcc/config/aarch64/aarch64-protos.h
trunk/gcc/config/aarch64/aarch64.c
trunk/gcc/config/aarch64/driver-aarch64.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.target/aarch64/mgeneral-regs_4.c
trunk/gcc/testsuite/gcc.target/aarch64/target_attr_15.c
>From gcc-bugs-return-521810-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 10:17:12 2016
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Subject: [Bug target/70133] AArch64 -mtune=native generates improperly formatted -march parameters
Date: Mon, 11 Apr 2016 10:17:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70133
--- Comment #11 from James Greenhalgh <jgreenhalgh at gcc dot gnu.org> ---
Author: jgreenhalgh
Date: Mon Apr 11 10:16:26 2016
New Revision: 234877
URL: https://gcc.gnu.org/viewcvs?rev=234877&root=gcc&view=rev
Log:
[Patch AArch64 3/3] Fix up for pr70133
gcc/
PR target/70133
* config/aarch64/driver-aarch64.c
(aarch64_get_extension_string_for_isa_flags): New.
(arch_extension): Rename to...
(aarch64_arch_extension): ...This.
(ext_to_feat_string): Rename to...
(aarch64_extensions): ...This.
(aarch64_core_data): Keep track of architecture extension flags.
(cpu_data): Rename to...
(aarch64_cpu_data): ...This.
(aarch64_arch_driver_info): Keep track of architecture extension
flags.
(get_arch_name_from_id): Rename to...
(get_arch_from_id): ...This, change return type.
(host_detect_local_cpu): Update and reformat for renames, handle
extensions through common infrastructure.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/aarch64/driver-aarch64.c
>From gcc-bugs-return-521811-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 10:21:29 2016
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Subject: [Bug target/70133] AArch64 -mtune=native generates improperly formatted -march parameters
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James Greenhalgh <jgreenhalgh at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #12 from James Greenhalgh <jgreenhalgh at gcc dot gnu.org> ---
Fixed on trunk with r234875 r234876 and r234877 . You'll need to contact Linaro
through their support/bug channels if you think these fixes should be ported to
the Linaro releases.
>From gcc-bugs-return-521812-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 10:33:39 2016
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Subject: [Bug target/69841] Wrong template instantiation in C++11 on armv7l
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James Greenhalgh <jgreenhalgh at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jason at redhat dot com
--- Comment #6 from James Greenhalgh <jgreenhalgh at gcc dot gnu.org> ---
*ping*
>From gcc-bugs-return-521813-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 10:37:40 2016
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Subject: [Bug c++/70621] [6 Regression] ICE on invalid code at -O1 and above on x86_64-linux-gnu in record_reference, at cgraphbuild.c:64
Date: Mon, 11 Apr 2016 10:37:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jason at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
It is unfortunate that due to the Cilk+ bug it is hard to bisect this properly.
Anyway, looking at what 5.x does I see a major difference of r229018, we used
to modify the initializer (apparently in-place), but we no longer do and the
PTRMEM_CST remains in the IL until the ME.
>From gcc-bugs-return-521814-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 10:42:10 2016
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Subject: [Bug c++/70615] [6 Regression] ICE on valid code at -O1 and above on x86_64-linux-gnu in add_expr, at tree.c:7870
Date: Mon, 11 Apr 2016 10:42:00 -0000
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
This is another case of PTRMEM_CST leaking from the FE to the gimplifier (the
other is PR70621, but in this case it is not even during error-recovery).
>From gcc-bugs-return-521815-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 10:49:39 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/70625] New: [4.9/5 Regression] Memory exhaustion when building specific snippet at -O2
Date: Mon, 11 Apr 2016 10:49:00 -0000
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Bug ID: 70625
Summary: [4.9/5 Regression] Memory exhaustion when building
specific snippet at -O2
Product: gcc
Version: 4.9.3
Status: UNCONFIRMED
Keywords: memory-hog
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
Target: armv7a-hardfloat-linux-gnueabihf, x86_64-pc-linux-gnu
armv7a-hardfloat-linux-gnueabihf-4.9.3 and x86_64-pc-linux-gnu-5.3.0 exhaust
all available memory when compiling the following snippet at -O2:
int b8, il, rc, nm;
void
h9(void)
{
int *av = &b8;
is:
for (;;) {
int vj, wk;
int *m9 = &b8;
if (*m9 == *av) {
if (il == 0)
goto is;
di:
continue;
for (vj = 0; vj < 1; ++vj) {
goto di;
kz:
;
}
}
for (rc = 0; rc < 2; ++rc) {
int bc = rc ? rc : nm;
int ud = bc ? (*av ? 0 : rc) : 1;
if (ud != 0)
if (*av != 0)
goto kz;
}
for (wk = 0; wk < 3; ++wk)
++(*av);
av = 0;
}
}
Mostly vec- and bitmap-related calls show up in perf top:
1.93% cc1 [.] bitmap_bit_p
1.41% cc1 [.] pool_alloc
1.36% cc1 [.] bitmap_set_bit
1.18% cc1 [.] bitmap_and_compl
1.15% cc1 [.] VN_INFO
1.05% cc1 [.] bitmap_clear
0.78% cc1 [.] bitmap_copy
0.72% cc1 [.] vec<pre_expr_d*, va_heap, vl_embed>::iterate
0.67% cc1 [.] vec<pre_expr_d*, va_heap, vl_ptr>::operator[]
0.67% cc1 [.] vec_safe_length<edge_def*, va_gc>
0.67% cc1 [.] vec<pre_expr_d*, va_heap,
vl_embed>::operator[]
0.65% cc1 [.] vec<pre_expr_d*, va_heap,
vl_embed>::quick_push
0.64% cc1 [.] vec<edge_def*, va_gc, vl_embed>::length
0.59% cc1 [.] bitmap_equal_p
0.49% cc1 [.] vec<vn_ssa_aux*, va_heap,
vl_embed>::operator[]
0.49% cc1 [.] bitmap_count_bits
0.47% cc1 [.] vec<pre_expr_d*, va_heap, vl_ptr>::reserve
0.47% cc1 [.] vec<pre_expr_d*, va_heap, vl_ptr>::iterate
0.47% cc1 [.] vec<vn_ssa_aux*, va_heap, vl_ptr>::operator[]
0.46% cc1 [.] iterative_hash_host_wide_int
0.44% cc1 [.] value_id_constant_p
0.42% cc1 [.] va_heap::reserve<pre_expr_d*>
0.40% cc1 [.] vec<pre_expr_d*, va_heap, vl_ptr>::space
0.39% cc1 [.] vec<pre_expr_d*, va_heap, vl_embed>::space
0.37% cc1 [.] vec<pre_expr_d*, va_heap,
vl_embed>::embedded_init
0.37% cc1 [.] bitmap_and_into
0.33% cc1 [.] vec<bitmap_head*, va_heap,
vl_ptr>::operator[]
0.31% cc1 [.] vec<bitmap_head*, va_heap,
vl_embed>::operator[]
0.30% cc1 [.] bitmap_empty_p
0.28% cc1 [.] vec<pre_expr_d*, va_heap, vl_ptr>::safe_push
0.23% cc1 [.] va_heap::release<pre_expr_d*>
0.23% cc1 [.] bitmap_clear_bit
0.22% cc1 [.] vec<edge_def*, va_gc, vl_embed>::operator[]
0.21% cc1 [.] xrealloc
0.20% cc1 [.] vec<pre_expr_d*, va_heap, vl_ptr>::release
0.18% cc1 [.] vec_prefix::calculate_allocation
0.18% cc1 [.] vec<basic_block_def*, va_heap,
vl_embed>::iterate
0.17% cc1 [.] vec<pre_expr_d*, va_heap, vl_ptr>::quick_push
This snippet was reduced from the same source as the one from PR70623.
>From gcc-bugs-return-521816-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 10:56:11 2016
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From: "ktkachov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/70625] [4.9/5 Regression] Memory exhaustion when building specific snippet at -O2
Date: Mon, 11 Apr 2016 10:56:00 -0000
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ktkachov at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ktkachov at gcc dot gnu.org
--- Comment #1 from ktkachov at gcc dot gnu.org ---
I see the PR70623 ICE with 4.9 and 5 at -O2 on arm-none-eabi.
Do you have any other relevant gcc configure options that trigger this?
>From gcc-bugs-return-521817-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 11:26:09 2016
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From: "rogero at howzatt dot demon.co.uk" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug preprocessor/69650] [6 Regression] ICE in linemap_line_start, at libcpp/line-map.c:803
Date: Mon, 11 Apr 2016 11:26:00 -0000
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--- Comment #54 from Roger Orr <rogero at howzatt dot demon.co.uk> ---
Unfortunately the patch does not help: the cached 'from' pointer is a pointer
into the old maps entry -- the one which has now been deallocated.
The first test, main_file_p, now (correctly) fails.
The second test,
(new_file
&& from != NULL
&& filename_cmp (ORDINARY_MAP_FILE_NAME (from), new_file) != 0)
now SEGVs as the memory area 'from' refers has been freed, so
ORDINARY_MAP_FILE_NAME returns a pointer value read from this freed memory,
which now contains 0x5a.
The call stack of the re-allocation is:
#0 __memset_x86_64 () at ../sysdeps/x86_64/memset.S:1229
#1 0x0000000000b1d595 in ggc_free (p=0x7ffff18b2000) at
../../gcc/ggc-page.c:1611
#2 0x0000000000d5019d in ggc_realloc (x=0x7ffff18b2000, size=524288) at
../../gcc/ggc-common.c:162
#3 0x00000000010ce764 in realloc_for_line_map (ptr=0x7ffff18b2000, len=524288)
at ../../gcc/toplev.c:939
#4 0x0000000001b223aa in new_linemap (set=0x7ffff7ffc000, reason=LC_RENAME) at
../../libcpp/line-map.c:427
#5 0x0000000001b2264b in linemap_add (set=0x7ffff7ffc000, reason=LC_RENAME,
sysp=2,
to_file=0x2c9ba00
"/opt/reactor-buildkit/B2BH-BK2GIT44-1/poco/include/Poco/Net/IPAddress.h",
to_line=344) at ../../libcpp/line-map.c:500
#6 0x0000000001b22d2d in linemap_line_start (set=0x7ffff7ffc000, to_line=344,
max_column_hint=256) at ../../libcpp/line-map.c:748
#7 0x0000000001b22f1a in linemap_position_for_column (set=0x7ffff7ffc000,
to_column=162) at ../../libcpp/line-map.c:809
#8 0x0000000001b2066f in _cpp_lex_direct (pfile=0x2b20310) at
../../libcpp/lex.c:2730
#9 0x0000000001b1f0f2 in _cpp_lex_token (pfile=0x2b20310) at
../../libcpp/lex.c:2202
#10 0x0000000001b29956 in cpp_get_token_1 (pfile=0x2b20310, location=0x0) at
../../libcpp/macro.c:2439
#11 0x0000000001b29d9b in cpp_get_token (pfile=0x2b20310) at
../../libcpp/macro.c:2581
#12 0x0000000001b0cec6 in do_linemarker (pfile=0x2b20310) at
../../libcpp/directives.c:1009
#13 0x0000000001b0bf65 in _cpp_handle_directive (pfile=0x2b20310, indented=0)
at ../../libcpp/directives.c:510
#14 0x0000000001b1f142 in _cpp_lex_token (pfile=0x2b20310) at
../../libcpp/lex.c:2214
#15 0x0000000001b29956 in cpp_get_token_1 (pfile=0x2b20310,
location=0x7fffffffd144) at ../../libcpp/macro.c:2439
#16 0x0000000001b29dc0 in cpp_get_token_with_location (pfile=0x2b20310,
loc=0x7fffffffd144) at ../../libcpp/macro.c:2625
#17 0x0000000000ae8d90 in c_lex_with_flags (value=0x7fffffffd148,
loc=0x7fffffffd144, cpp_flags=0x7fffffffd142 "@â–’â–’Sâ–’\034", lex_flags=2)
at ../../gcc/c-family/c-lex.c:391
#18 0x0000000000900009 in cp_lexer_get_preprocessor_token
(lexer=0x7ffff1f2b480, token=0x7fffffffd140) at ../../gcc/cp/parser.c:792
#19 0x00000000008ffcb4 in cp_lexer_new_main () at ../../gcc/cp/parser.c:656
#20 0x000000000090349b in cp_parser_new () at ../../gcc/cp/parser.c:3689
#21 0x0000000000952055 in c_parse_file () at ../../gcc/cp/parser.c:37405
#22 0x0000000000af45f8 in c_common_parse_file () at
../../gcc/c-family/c-opts.c:1064
#23 0x00000000010cdb41 in compile_file () at ../../gcc/toplev.c:465
#24 0x00000000010d00e9 in do_compile () at ../../gcc/toplev.c:1988
#25 0x00000000010d036e in toplev::main (this=0x7fffffffd260, argc=16,
argv=0x7fffffffd368) at ../../gcc/toplev.c:2096
#26 0x0000000001ae22ce in main (argc=16, argv=0x7fffffffd368) at
../../gcc/main.c:39
and the arguments to memset() are:
void *s = 0x7ffff18b2000
int c = 0xa5a
size_t n = 131782
In frame 12, from = 0x7ffff18d0c20, which is within this range and so the
contents are set to 0x5a.
I've tried out this patch, re-reading the potentially changed maps value from
pfile->line_table, and it seems to work for me:
*** ../../gcc-trunk-234481-original/libcpp/directives.c 2016-04-07
12:46:40.000000000 +0100
--- directives.c 2016-04-11 11:54:18.000000000 +0100
*************** do_linemarker (cpp_reader *pfile)
*** 1048,1053 ****
--- 1048,1056 ----
if (reason == LC_LEAVE)
{
+ // reload map in case re-allocation has occurred
+ const line_map_ordinary *map = LINEMAPS_LAST_ORDINARY_MAP
(pfile->line_table);
+
const line_map_ordinary *from;
if (MAIN_FILE_P (map)
|| (new_file
>From gcc-bugs-return-521818-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 11:49:59 2016
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Subject: [Bug target/70133] AArch64 -mtune=native generates improperly formatted -march parameters
Date: Mon, 11 Apr 2016 11:49:00 -0000
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--- Comment #13 from davidwillmore at gmail dot com ---
Thank you very much!
>From gcc-bugs-return-521819-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 11:55:17 2016
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From: "rogero at howzatt dot demon.co.uk" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug preprocessor/69650] [6 Regression] ICE in linemap_line_start, at libcpp/line-map.c:803
Date: Mon, 11 Apr 2016 11:55:00 -0000
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--- Comment #55 from Roger Orr <rogero at howzatt dot demon.co.uk> ---
Note - I should have added that I am not at all sure the fix above is
*correct*, simply that it prevents accessing the freed entry.
I don't know enough about how the code works to know whether the value obtained
by re-loading via:
maps = LINEMAPS_LAST_ORDINARY_MAP (pfile->line_table);
is reading the the value that _actually_ needs to be verified in the subsequent
code: the logical entry referred to by "LINEMAPS_LAST_ORDINARY_MAP" might have
changed from the one obtained at the start of the function.
>From gcc-bugs-return-521820-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 12:29:12 2016
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Subject: [Bug libstdc++/70607] The return type of std::conj must be std::complex<T>
Date: Mon, 11 Apr 2016 12:29:00 -0000
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I think Marc's point is that GCC is doing what DR 1137 says ... but it looks as
though the DR resolution never made it into C++11.
>From gcc-bugs-return-521821-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 12:32:08 2016
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Subject: [Bug libstdc++/70607] The return type of std::conj must be std::complex<T>
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target|GNU/Linux x86_64 |
Host|GNU/Linux x86_64 |
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Not target-specific.
>From gcc-bugs-return-521822-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 12:44:26 2016
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Subject: [Bug libstdc++/70609] std::experimental::filesystem::copy fails if the file size is 0 bytes
Date: Mon, 11 Apr 2016 12:44:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70609
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2016-04-11
Assignee|unassigned at gcc dot gnu.org |redi at gcc dot gnu.org
Ever confirmed|0 |1
>From gcc-bugs-return-521823-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 12:50:49 2016
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/70614] [4.9/5/6 Regression] GCC gets stuck with -O
Date: Mon, 11 Apr 2016 12:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70614
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |spop at gcc dot gnu.org
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Even on the following testcase at -O2 we end up with over 2000000
analyze_scalar_evolution calls (while that finishes within a second and half,
it still looks very much excessive to me). Perhaps we should have similar
param like we have for max-ssa-name-query-depth (certainly not as tight) and
simply give up if we recurse more than that during computation of SCEV?
struct S
{
int *s;
};
int a, b, c, d, e, f, *g, *h;
void
foo (struct S *t)
{
int *i;
lab1:
switch (0)
{
case 0:
switch (0)
{
case 0:
case 1:
if (((struct S *) t)->s)
goto lab4;
}
}
f = 0;
lab2:
if (i)
goto lab3;
if (h)
g = 0;
goto lab4;
lab3:
if ((int) i)
{
i = i;
goto lab2;
}
lab4:
lab5:
switch (a)
{
case 1:
if (0)
goto lab8;
switch (1)
{
case 1:
if ((int) ((struct S *) t)->s)
switch (0)
{
case 0:
switch (e)
{
case 0:
switch (c)
{
case 0:
if (((struct S *) t)->s)
lab6:
switch (d)
{
case 0:
if ((int) ((struct S *) t)->s & 1)
goto lab8;
lab7:
if (i)
i = 0;
}
}
}
}
case 0:
goto lab8;
}
case 0:
if (a)
goto lab5;
}
lab8:
lab9:
if (a)
goto lab9;
switch ((int) g)
{
case 0:
switch (b)
{
case 0:
if (((struct S *) t)->s)
switch (e)
{
case 0:
if ((int) ((struct S *) t)->s)
i = 1;
}
}
}
lab10:
if (h)
goto lab10;
switch ((int) i)
{
case 0:
goto lab1;
}
}
>From gcc-bugs-return-521824-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 12:55:17 2016
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Subject: [Bug rtl-optimization/70398] [6 Regression] gcc.dg/vect/slp-multitypes-9.c FAILs with -fno-tree-loop-optimize -fno-tree-ter
Date: Mon, 11 Apr 2016 12:55:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70398
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-521825-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 13:15:27 2016
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Subject: [Bug preprocessor/69650] [6 Regression] ICE in linemap_line_start, at libcpp/line-map.c:803
Date: Mon, 11 Apr 2016 13:15:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69650
Bernd Schmidt <bernds at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Resolution|FIXED |---
--- Comment #56 from Bernd Schmidt <bernds at gcc dot gnu.org> ---
Ok, thanks for the effort in identifying the problem. I should reopen this so
it gets tracked as a regression. I'll put your patch through a test cycle.
>From gcc-bugs-return-521826-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 13:21:48 2016
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From: "rogero at howzatt dot demon.co.uk" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug preprocessor/69650] [6 Regression] ICE in linemap_line_start, at libcpp/line-map.c:803
Date: Mon, 11 Apr 2016 13:21:00 -0000
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--- Comment #57 from Roger Orr <rogero at howzatt dot demon.co.uk> ---
Created attachment 38232
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38232&action=edit
Stripped down intermediate file
I've managed to reproduce the problem without including any proprietary code -
code replaced with blank lines between the "#" lines (and a slight change in
the number of includes) now provokes the diagnostic.
/var/tmp/gcc-trunk-234481/install/libexec/gcc/x86_64-pc-linux-gnu/6.0.0/cc1plus
-fpreprocessed pr69650.ii -quiet -dumpbase pr69650.ii -mtune=generic
-march=x86-64 -auxbase-strip /var/tmp/pr69650.o -O3 -Werror -std=c++14 -o
/tmp/ccNlrUZ8.s
In file included from
/opt/reactor-buildkit/B2BH-BK2GIT44-1/poco/include/Poco/Net/IPAddress.h:346:0,
from
/home/rorr/linuxdev109ws_9119/rorr_linuxdev109ws_9119/Reactor5/project/prj-lcc-device-longer-name/reactor/src/base/messaging/messaging/rsHintServerBase.hxx:19,
from
/home/rorr/linuxdev109ws_9119/rorr_linuxdev109ws_9119/Reactor5/project/prj-lcc-device-longer-name/reactor/src/base/messaging/src/rsMessaging.cxx:16:
/home/rorr/linuxdev109ws_9119/rorr_linuxdev109ws_9119/Reactor5/project/prj-lcc-device-longer-name/reactor/src/base/hxx/rsEnumMnemonic.hxx:10:165:
error: file
"/home/rorr/linuxdev109ws_9119/rorr_linuxdev109ws_9119/Reactor5/project/prj-lcc-device-longer-name/reactor/src/base/messaging/messaging/rsHintServerBase.hxx"
linemarker ignored due to incorrect nesting [-Werror]
/home/rorr/linuxdev109ws_9119/rorr_linuxdev109ws_9119/Reactor5/project/prj-lcc-device-longer-name/reactor/src/base/hxx/rsEnumMnemonic.hxx:12:154:
error: file
"/home/rorr/linuxdev109ws_9119/rorr_linuxdev109ws_9119/Reactor5/project/prj-lcc-device-longer-name/reactor/src/base/messaging/src/rsMessaging.cxx"
linemarker ignored due to incorrect nesting [-Werror]
cc1plus: all warnings being treated as errors
(234480 compiles cleanly)
>From gcc-bugs-return-521827-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 13:47:31 2016
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From: "amodra at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70117] ppc long double isinf() is wrong?
Date: Mon, 11 Apr 2016 13:47:00 -0000
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--- Comment #18 from Alan Modra <amodra at gcc dot gnu.org> ---
Author: amodra
Date: Mon Apr 11 13:46:51 2016
New Revision: 234880
URL: https://gcc.gnu.org/viewcvs?rev=234880&root=gcc&view=rev
Log:
PR70117, ppc long double isinf
gcc/
PR target/70117
* builtins.c (fold_builtin_classify): For IBM extended precision,
look at just the high-order double to test for NaN.
(fold_builtin_interclass_mathfn): Similarly for Inf. For isnormal
test just the high double for Inf but both doubles for subnormal
limit.
gcc/testsuite/
* gcc.target/powerpc/pr70117.c: New.
Added:
branches/gcc-5-branch/gcc/testsuite/gcc.target/powerpc/pr70117.c
Modified:
branches/gcc-5-branch/gcc/ChangeLog
branches/gcc-5-branch/gcc/builtins.c
branches/gcc-5-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-521828-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 13:48:38 2016
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From: "amodra at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70117] ppc long double isinf() is wrong?
Date: Mon, 11 Apr 2016 13:48:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70117
--- Comment #19 from Alan Modra <amodra at gcc dot gnu.org> ---
Author: amodra
Date: Mon Apr 11 13:47:40 2016
New Revision: 234881
URL: https://gcc.gnu.org/viewcvs?rev=234881&root=gcc&view=rev
Log:
PR70117, ppc long double isinf
gcc/
PR target/70117
* builtins.c (fold_builtin_classify): For IBM extended precision,
look at just the high-order double to test for NaN.
(fold_builtin_interclass_mathfn): Similarly for Inf. For isnormal
test just the high double for Inf but both doubles for subnormal
limit.
gcc/testsuite/
* gcc.target/powerpc/pr70117.c: New.
Added:
branches/gcc-4_9-branch/gcc/testsuite/gcc.target/powerpc/pr70117.c
Modified:
branches/gcc-4_9-branch/gcc/ChangeLog
branches/gcc-4_9-branch/gcc/builtins.c
branches/gcc-4_9-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-521829-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 13:52:05 2016
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Subject: [Bug rtl-optimization/70625] [4.9/5 Regression] Memory exhaustion when building specific snippet at -O2
Date: Mon, 11 Apr 2016 13:52:00 -0000
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--- Comment #2 from Arseny Solokha <asolokha at gmx dot com> ---
(In reply to ktkachov from comment #1)
> I see the PR70623 ICE with 4.9 and 5 at -O2 on arm-none-eabi.
> Do you have any other relevant gcc configure options that trigger this?
Talking about this particular PR, I can't even reproduce it w/ all the targets
I have: it works well w/o ICE for powerpc-e300c3-linux-gnu, for example.
As of PR70623, for me it started triggering ICE somewhere between
6.0.0-alpha20160110 and 6.0.0-alpha20160403 for both
powerpc-e500v2-linus-gnuspe and x86_64-pc-linux-gnu. I failed to reproduce it
w/ 4.9.3 and 5.3.0 configured for all four targets mentioned by me here. Given
your comment, I'll certainly try it in the days ahead w/ the flavor of
arm-none-eabi that I have.
In case I've got you wrong, what configure options do you want me to make
specific?
>From gcc-bugs-return-521830-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 13:56:43 2016
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From: "ktkachov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/70625] [4.9/5 Regression] Memory exhaustion when building specific snippet at -O2
Date: Mon, 11 Apr 2016 13:56:00 -0000
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--- Comment #3 from ktkachov at gcc dot gnu.org ---
(In reply to Arseny Solokha from comment #2)
> (In reply to ktkachov from comment #1)
> > I see the PR70623 ICE with 4.9 and 5 at -O2 on arm-none-eabi.
> > Do you have any other relevant gcc configure options that trigger this?
>
> Talking about this particular PR, I can't even reproduce it w/ all the
> targets I have: it works well w/o ICE for powerpc-e300c3-linux-gnu, for
> example.
>
> As of PR70623, for me it started triggering ICE somewhere between
> 6.0.0-alpha20160110 and 6.0.0-alpha20160403 for both
> powerpc-e500v2-linus-gnuspe and x86_64-pc-linux-gnu. I failed to reproduce
> it w/ 4.9.3 and 5.3.0 configured for all four targets mentioned by me here.
> Given your comment, I'll certainly try it in the days ahead w/ the flavor of
> arm-none-eabi that I have.
>
> In case I've got you wrong, what configure options do you want me to make
> specific?
I tried compiling it for an arm-none-eabi target and I get the ICE rather than
seeing the memory-hog behaviour.
By configure options I mean the output of gcc -v.
For arm targets, the --with-arch,--with-cpu,--with-fpu,--with-float-abi
configure switches can result in different compiler paths being taken, which
may expose or hide the bug.
>From gcc-bugs-return-521831-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 13:57:02 2016
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Subject: [Bug target/70117] ppc long double isinf() is wrong?
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Alan Modra <amodra at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #20 from Alan Modra <amodra at gmail dot com> ---
Fixed
>From gcc-bugs-return-521832-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 13:57:29 2016
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From: "cesar at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/70626] New: bogus results in 'acc parallel loop' reductions
Date: Mon, 11 Apr 2016 13:57:00 -0000
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Bug ID: 70626
Summary: bogus results in 'acc parallel loop' reductions
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Keywords: openacc
Severity: normal
Priority: P3
Component: middle-end
Assignee: cesar at gcc dot gnu.org
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Created attachment 38233
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38233&action=edit
test case
Currently, given a combined acc parallel loop of the form
#pragma acc parallel loop reduction(+:var)
all of the front ends will split that loop as
#pragma acc parallel
#pragma acc loop reduction(+:var)
This is bad because the gimplifier will not assign an implicit present_or_copy
clause for the reduction variable 'var', instead 'var' gets transferred via
firstprivate. One solution here is to teach the front ends to attach the
reduction clause to both directives, instead of just the split acc loop.
>From gcc-bugs-return-521833-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 14:01:56 2016
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Subject: [Bug c++/70627] New: internal compiler error: verify_type failed
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Bug ID: 70627
Summary: internal compiler error: verify_type failed
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This is with gcc (GCC) 6.0.0 20160410 (experimental) building part of Firefox
on x86_64-linux, on Fedora 21.
>From gcc-bugs-return-521834-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 14:04:29 2016
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Subject: [Bug libstdc++/70609] std::experimental::filesystem::copy fails if the file size is 0 bytes
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The problem is due to my lazy approach to copying the file:
__gnu_cxx::stdio_filebuf<char> sbin(in.fd, std::ios::in);
__gnu_cxx::stdio_filebuf<char> sbout(out.fd, std::ios::out);
if ( !(std::ostream(&sbout) << &sbin) )
{
ec = std::make_error_code(std::errc::io_error);
return false;
}
The condition is false when no bytes are copied. We just want to make that code
conditional with:
if (from_st->st_size)
That function should also check the result of ::close(fd), on at least the
target file.
>From gcc-bugs-return-521835-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 14:09:33 2016
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Subject: [Bug c++/70627] internal compiler error: verify_type failed
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--- Comment #1 from jseward at acm dot org ---
sewardj@dundee[6X]:~/MOZ$ c++ -c Unified_cpp_dom_animation0.ii -Wall
-Wc++11-compat -Wempty-body -Wignored-qualifiers -Woverloaded-virtual
-Wpointer-arith -Wsign-compare -Wtype-limits -Wunreachable-code -Wwrite-strings
-Wc++14-compat -Wno-invalid-offsetof -Wno-error=maybe-uninitialized
-Wno-error=deprecated-declarations -Wno-error=array-bounds -fno-exceptions
-fno-strict-aliasing -fno-rtti -fno-exceptions -fno-math-errno -std=gnu++11
-pthread -pipe -g -g -Og -fno-omit-frame-pointer -Wshadow
In file included from
/home/sewardj/MOZ/MC-MOCHI/ff-Og-linux64/dom/animation/Unified_cpp_dom_animation0.cpp:137:0:
/home/sewardj/MOZ/MC-MOCHI/dom/animation/PendingAnimationTracker.cpp: In
function ‘T&& mozilla::Forward(typename mozilla::RemoveReference<T>::Type&)
[with T = const mozilla::CSSPseudoElementType&]’:
/home/sewardj/MOZ/MC-MOCHI/dom/animation/PendingAnimationTracker.cpp:124:1:
error: type variant has different TREE_TYPE
} // namespace mozilla
^
<enumeral_type 0x7fb946878498 CSSPseudoElementType
type <integer_type 0x7fb94bc15000 uint8_t sizes-gimplified asm_written
public unsigned string-flag type_6 QI
size <integer_cst 0x7fb94bd94f48 constant 8>
unit size <integer_cst 0x7fb94bd94f60 constant 1>
align 8 symtab 1270682720 alias set -1 canonical type 0x7fb94bd98540
precision 8 min <integer_cst 0x7fb94bd94f78 0> max <integer_cst 0x7fb94bd94f18
255>
pointer_to_this <pointer_type 0x7fb94a8551f8> reference_to_this
<reference_type 0x7fb9437dcc78>>
sizes-gimplified asm_written static unsigned type_5 type_6 QI size
<integer_cst 0x7fb94bd94f48 8> unit size <integer_cst 0x7fb94bd94f60 1>
align 8 symtab 1173426976 alias set -1 canonical type 0x7fb946878498
precision 8 min <integer_cst 0x7fb94bd94f78 0> max <integer_cst 0x7fb94bd94f18
255>
values <tree_list 0x7fb946a94668
purpose <identifier_node 0x7fb94ae49160 after
bindings <(nil)>
local bindings <(nil)>>
value <const_decl 0x7fb945e98a80 after type <enumeral_type
0x7fb946878498 CSSPseudoElementType>
readonly constant used VOID file
/home/sewardj/MOZ/MC-MOCHI/layout/style/nsCSSPseudoElementList.h line 28 col 1
align 1 context <enumeral_type 0x7fb946878498 CSSPseudoElementType>
initial <integer_cst 0x7fb945eecc60 0>>
chain <tree_list 0x7fb946a94690
purpose <identifier_node 0x7fb94ae491b8 before
bindings <(nil)>
local bindings <(nil)>> value <const_decl 0x7fb945e98af0
before>
chain <tree_list 0x7fb946a946b8
purpose <identifier_node 0x7fb94ae49210 backdrop
bindings <(nil)>
local bindings <(nil)>> value <const_decl 0x7fb945e98b60
backdrop>
chain <tree_list 0x7fb946a946e0
purpose <identifier_node 0x7fb94ae49268 firstLetter
bindings <(nil)>
local bindings <(nil)>> value <const_decl
0x7fb945e98bd0 firstLetter>
chain <tree_list 0x7fb946a94708
purpose <identifier_node 0x7fb94ae492c0 firstLine
bindings <(nil)>
local bindings <(nil)>> value <const_decl
0x7fb945e98c40 firstLine>
chain <tree_list 0x7fb946a94730 purpose
<identifier_node 0x7fb94ae49318 mozSelection> value <const_decl 0x7fb945e98cb0
mozSelection> chain <tree_list 0x7fb946a94758>>>>>>> context <namespace_decl
0x7fb94bef1390 mozilla>
pointer_to_this <pointer_type 0x7fb938464c78> reference_to_this
<reference_type 0x7fb93d4f9000> chain <type_decl 0x7fb94687c558
CSSPseudoElementType>>
/home/sewardj/MOZ/MC-MOCHI/dom/animation/PendingAnimationTracker.cpp:124:1:
error: type variant's TREE_TYPE
<integer_type 0x7fb94bc15000 uint8_t sizes-gimplified asm_written public
unsigned string-flag type_6 QI
size <integer_cst 0x7fb94bd94f48 type <integer_type 0x7fb94bd982a0
bitsizetype> constant 8>
unit size <integer_cst 0x7fb94bd94f60 type <integer_type 0x7fb94bd981f8
sizetype> constant 1>
align 8 symtab 1270682720 alias set -1 canonical type 0x7fb94bd98540
precision 8 min <integer_cst 0x7fb94bd94f78 0> max <integer_cst 0x7fb94bd94f18
255>
pointer_to_this <pointer_type 0x7fb94a8551f8> reference_to_this
<reference_type 0x7fb9437dcc78>>
/home/sewardj/MOZ/MC-MOCHI/dom/animation/PendingAnimationTracker.cpp:124:1:
error: type's TREE_TYPE
<integer_type 0x7fb945f12b28 CSSPseudoElementTypeBase sizes-gimplified
asm_written public unsigned string-flag type_6 QI
size <integer_cst 0x7fb94bd94f48 type <integer_type 0x7fb94bd982a0
bitsizetype> constant 8>
unit size <integer_cst 0x7fb94bd94f60 type <integer_type 0x7fb94bd981f8
sizetype> constant 1>
align 8 symtab 1173427056 alias set -1 canonical type 0x7fb94bd98540
precision 8 min <integer_cst 0x7fb94bd94f78 0> max <integer_cst 0x7fb94bd94f18
255>>
<enumeral_type 0x7fb945f193f0 CSSPseudoElementType
type <integer_type 0x7fb945f12b28 CSSPseudoElementTypeBase sizes-gimplified
asm_written public unsigned string-flag type_6 QI
size <integer_cst 0x7fb94bd94f48 constant 8>
unit size <integer_cst 0x7fb94bd94f60 constant 1>
align 8 symtab 1173427056 alias set -1 canonical type 0x7fb94bd98540
precision 8 min <integer_cst 0x7fb94bd94f78 0> max <integer_cst 0x7fb94bd94f18
255>>
readonly sizes-gimplified static unsigned type_5 type_6 QI size
<integer_cst 0x7fb94bd94f48 8> unit size <integer_cst 0x7fb94bd94f60 1>
align 8 symtab 921920128 alias set -1 canonical type 0x7fb945f193f0
precision 8 min <integer_cst 0x7fb94bd94f78 0> max <integer_cst 0x7fb94bd94f18
255>
values <tree_list 0x7fb946a94668
purpose <identifier_node 0x7fb94ae49160 after
bindings <(nil)>
local bindings <(nil)>>
value <const_decl 0x7fb945e98a80 after type <enumeral_type
0x7fb946878498 CSSPseudoElementType>
readonly constant used VOID file
/home/sewardj/MOZ/MC-MOCHI/layout/style/nsCSSPseudoElementList.h line 28 col 1
align 1 context <enumeral_type 0x7fb946878498 CSSPseudoElementType>
initial <integer_cst 0x7fb945eecc60 0>>
chain <tree_list 0x7fb946a94690
purpose <identifier_node 0x7fb94ae491b8 before
bindings <(nil)>
local bindings <(nil)>> value <const_decl 0x7fb945e98af0
before>
chain <tree_list 0x7fb946a946b8
purpose <identifier_node 0x7fb94ae49210 backdrop
bindings <(nil)>
local bindings <(nil)>> value <const_decl 0x7fb945e98b60
backdrop>
chain <tree_list 0x7fb946a946e0
purpose <identifier_node 0x7fb94ae49268 firstLetter
bindings <(nil)>
local bindings <(nil)>> value <const_decl
0x7fb945e98bd0 firstLetter>
chain <tree_list 0x7fb946a94708
purpose <identifier_node 0x7fb94ae492c0 firstLine
bindings <(nil)>
local bindings <(nil)>> value <const_decl
0x7fb945e98c40 firstLine>
chain <tree_list 0x7fb946a94730 purpose
<identifier_node 0x7fb94ae49318 mozSelection> value <const_decl 0x7fb945e98cb0
mozSelection> chain <tree_list 0x7fb946a94758>>>>>>> context <namespace_decl
0x7fb94bef1390 mozilla>
pointer_to_this <pointer_type 0x7fb93bc9b348> reference_to_this
<reference_type 0x7fb93bc9bd20>>
/home/sewardj/MOZ/MC-MOCHI/dom/animation/PendingAnimationTracker.cpp:124:1:
internal compiler error: verify_type failed
0xf9f9e2 verify_type(tree_node const*)
../../gcc-6-20160410/gcc/tree.c:13908
0x9a1dd4 gen_type_die_with_usage
../../gcc-6-20160410/gcc/dwarf2out.c:22703
0x9a2439 gen_type_die_with_usage
../../gcc-6-20160410/gcc/dwarf2out.c:22805
0x9a31b6 gen_type_die
../../gcc-6-20160410/gcc/dwarf2out.c:22901
0x99b17f gen_decl_die
../../gcc-6-20160410/gcc/dwarf2out.c:23454
0x99b90e dwarf2out_decl
../../gcc-6-20160410/gcc/dwarf2out.c:23953
0x9b3078 dwarf2out_early_global_decl
../../gcc-6-20160410/gcc/dwarf2out.c:23626
0x9295ab symbol_table::finalize_compilation_unit()
../../gcc-6-20160410/gcc/cgraphunit.c:2556
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
sewardj@dundee[6X]:~/MOZ$ gcc --version
gcc (GCC) 6.0.0 20160410 (experimental)
Copyright (C) 2016 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
>From gcc-bugs-return-521836-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 14:13:49 2016
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Subject: [Bug c++/70627] internal compiler error: verify_type failed
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--- Comment #2 from jseward at acm dot org ---
Created attachment 38236
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38236&action=edit
Unified_cpp_dom_animation0.ii.bz2
Testcase .ii.bz2, compressed so as to get it under the 1MB limit :-(
>From gcc-bugs-return-521837-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 14:32:22 2016
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Subject: [Bug c++/70627] [6 Regression] internal compiler error: verify_type failed
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-11
CC| |jakub at gcc dot gnu.org
Target Milestone|--- |6.0
Summary|internal compiler error: |[6 Regression] internal
|verify_type failed |compiler error: verify_type
| |failed
Ever confirmed|0 |1
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r222991. Maybe related to PR70029.
>From gcc-bugs-return-521838-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 14:49:07 2016
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Subject: [Bug sanitizer/65479] sanitizer stack trace missing frames past #0 on powerpc64
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--- Comment #15 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Yes, it seems likely that this is due to this patch being missing from GCC 5.3:
http://reviews.llvm.org/D11552
The fix is present in trunk, so this should be fixed with a backport.
>From gcc-bugs-return-521839-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 15:00:47 2016
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Subject: [Bug target/69841] Wrong template instantiation in C++11 on armv7l
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--- Comment #7 from Jason Merrill <jason at gcc dot gnu.org> ---
(In reply to James Greenhalgh from comment #5)
> I don't know enough about the C++ standard to know whether this patch is
> reasonable to backport to GCC 5. Jason, do you have an opinion?
I'd be pretty nervous about packporting that patch, as changes to that behavior
tend to have unexpected side-effects. And it seems likely to have just made
this bug latent, rather than actually fixed it.
>From gcc-bugs-return-521840-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 15:03:24 2016
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Subject: [Bug c++/70627] [6 Regression] internal compiler error: verify_type failed
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Reducing now (at 4.5MB right now).
>From gcc-bugs-return-521841-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 15:06:22 2016
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Subject: [Bug middle-end/70626] bogus results in 'acc parallel loop' reductions
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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> ---
Guess it depends on what the standard says about that.
>From gcc-bugs-return-521842-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 15:12:26 2016
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Subject: [Bug lto/65950] Loop is not vectorized with lto.
Date: Mon, 11 Apr 2016 15:12:00 -0000
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Gian-Carlo Pascutto <gcp at sjeng dot org> changed:
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----------------------------------------------------------------------------
CC| |gcp at sjeng dot org
--- Comment #6 from Gian-Carlo Pascutto <gcp at sjeng dot org> ---
I'm seeing similar behavior in gcc-4.9.2 (debian stable) and gcc-5.3.1 (Ubuntu
16.04 prelease).
Adding -flto causes certain loops not to get vectorized, adding -fno-lto to
affected files fixes it.
Unfortunately producing a reduced testcase is not so easy, but program source
is available to gcc devs on request.
>From gcc-bugs-return-521843-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 15:24:13 2016
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Subject: [Bug debug/70628] New: [5/6 regression] ICE in get_reg_rtx, at emit-rtl.c:1025
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70628
Bug ID: 70628
Summary: [5/6 regression] ICE in get_reg_rtx, at
emit-rtl.c:1025
Product: gcc
Version: 5.3.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: debug
Assignee: unassigned at gcc dot gnu.org
Reporter: schwab@linux-m68k.org
Target Milestone: ---
Target: aarch64-*-*
Created attachment 38237
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38237&action=edit
Preprocessed source
$ gcc/xgcc -B gcc/ -O2 -g -S -mabi=ilp32 disk.i
disk/disk.c: In function ‘gp_port_library_list’:
disk/disk.c:305:1: internal compiler error: in gen_reg_rtx, at emit-rtl.c:1025
0x7f30d3 gen_reg_rtx(machine_mode)
../../gcc/emit-rtl.c:1025
0x8297b3 convert_modes(machine_mode, machine_mode, rtx_def*, int)
../../gcc/expr.c:723
0x777a5b cselib_expand_value_rtx_1
../../gcc/cselib.c:1832
0x779acb cselib_expand_value_rtx_cb(rtx_def*, bitmap_head*, int, rtx_def*
(*)(rtx_def*, bitmap_head*, int, void*), void*)
../../gcc/cselib.c:1540
0xdfa043 vt_expand_var_loc_chain
../../gcc/var-tracking.c:8329
0xdfa043 vt_expand_loc_callback
../../gcc/var-tracking.c:8492
0x77790b cselib_expand_value_rtx_1
../../gcc/cselib.c:1693
0x779acb cselib_expand_value_rtx_cb(rtx_def*, bitmap_head*, int, rtx_def*
(*)(rtx_def*, bitmap_head*, int, void*), void*)
../../gcc/cselib.c:1540
0xdf9cbf vt_expand_loc_callback
../../gcc/var-tracking.c:8426
0x777747 cselib_expand_value_rtx_1
../../gcc/cselib.c:1658
0x779acb cselib_expand_value_rtx_cb(rtx_def*, bitmap_head*, int, rtx_def*
(*)(rtx_def*, bitmap_head*, int, void*), void*)
../../gcc/cselib.c:1540
0xdfa043 vt_expand_var_loc_chain
../../gcc/var-tracking.c:8329
0xdfa043 vt_expand_loc_callback
../../gcc/var-tracking.c:8492
0x77790b cselib_expand_value_rtx_1
../../gcc/cselib.c:1693
0x777973 cselib_expand_value_rtx_1
../../gcc/cselib.c:1731
0x779acb cselib_expand_value_rtx_cb(rtx_def*, bitmap_head*, int, rtx_def*
(*)(rtx_def*, bitmap_head*, int, void*), void*)
../../gcc/cselib.c:1540
0xdfa043 vt_expand_var_loc_chain
../../gcc/var-tracking.c:8329
0xdfa043 vt_expand_loc_callback
../../gcc/var-tracking.c:8492
0x77790b cselib_expand_value_rtx_1
../../gcc/cselib.c:1693
0x779acb cselib_expand_value_rtx_cb(rtx_def*, bitmap_head*, int, rtx_def*
(*)(rtx_def*, bitmap_head*, int, void*), void*)
../../gcc/cselib.c:1540
Needs -O >= 2, -g >= 2 and -mabi=ilp32.
>From gcc-bugs-return-521844-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 15:25:09 2016
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70620] possible wrong code at -Os on x86_64-linux-gnu for C++ code with multiple inheritance and casting
Date: Mon, 11 Apr 2016 15:25:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Your code is equivalent to:
delete reinterpret_cast<D *>(static_cast<B1 *>(new E));
which means the conversion is not done safely, and you get a D* that doesn't
point to the D subobject.
Compare:
E* e = new E;
std::cout << (D*)e << '\n' << (B1*)e << '\n' << (D*)(B1*)e << '\n';
The expression (D*)(B1*)e is not the same as (D*)e, i.e. it does not produce
the address of the D subobject.
>From gcc-bugs-return-521845-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 15:29:36 2016
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Subject: [Bug testsuite/70150] Additonal test failures with --enable-default-pie
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70150
--- Comment #13 from psturm at computervoice dot com ---
(In reply to H.J. Lu from comment #12)
> Patches are posted at
>
> https://gcc.gnu.org/ml/gcc-patches/2016-03/msg00929.html
> https://gcc.gnu.org/ml/gcc-patches/2016-03/msg00995.html
https://gcc.gnu.org/ml/gcc-patches/2016-03/msg00929.html patch does not apply
because it appears it conflicts with another change made for HPPA:
In weekly snapshot 6-20160410: gcc/testsuite/gcc.dg/uninit-19.c
/* { dg-warning "may be used uninitialized" "" { target { { nonpic } || {
hppa*64*-*-* } } } 13 } */
/* { dg-warning "may be used uninitialized" "" { target { ! { { nonpic } || {
hppa*64*-*-* } } } } 22 } */
patch is looking for:
-/* { dg-warning "may be used uninitialized" "" { target nonpic } 13 } */
-/* { dg-warning "may be used uninitialized" "" { target { ! nonpic } } 22 } */
>From gcc-bugs-return-521846-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 15:52:51 2016
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Subject: [Bug middle-end/70626] bogus results in 'acc parallel loop' reductions
Date: Mon, 11 Apr 2016 15:52:00 -0000
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--- Comment #2 from cesar at gcc dot gnu.org ---
Created attachment 38238
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38238&action=edit
counter example
I looked at the standard again, and it says that the reduction clause should be
associated with the acc loop. That does make sense because if it were
duplicated, then as my counter example shows, the final reduction value would
be num_gangs times larger than it would be if there were only one reduction
clause.
I'll see what the acc technical committee says about this.
>From gcc-bugs-return-521847-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 16:12:08 2016
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Subject: [Bug debug/70628] [5/6 regression] ICE in get_reg_rtx, at emit-rtl.c:1025
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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> ---
Can't reproduce with a current trunk's cross, can you attach your auto-host.h ?
>From gcc-bugs-return-521848-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 16:24:59 2016
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Subject: [Bug debug/70628] [5/6 regression] ICE in get_reg_rtx, at emit-rtl.c:1025
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Andreas Schwab <schwab@linux-m68k.org> changed:
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CC| |mkuvyrkov at gcc dot gnu.org
--- Comment #2 from Andreas Schwab <schwab@linux-m68k.org> ---
a714a09ad18ee606064bbaac690ab1c8121dcc31 is the first bad commit
commit a714a09ad18ee606064bbaac690ab1c8121dcc31
Author: mkuvyrkov <mkuvyrkov@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Fri Oct 24 08:22:12 2014 +0000
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@216620
138bc75d-0d04-0410-961f-82ee72b054a4
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Subject: [Bug debug/70628] [5/6 regression] ICE in get_reg_rtx, at emit-rtl.c:1025
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--- Comment #3 from Andreas Schwab <schwab@linux-m68k.org> ---
Created attachment 38239
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38239&action=edit
auto-host.h
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Subject: [Bug tree-optimization/70545] [openacc] gfortran.dg/goacc/kernels-loop-n.f95 not parallelized
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Thomas Schwinge <tschwinge at gcc dot gnu.org> changed:
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Subject: [Bug debug/70628] [5/6 regression] ICE in get_reg_rtx, at emit-rtl.c:1025
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ktkachov at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-11
CC| |ktkachov at gcc dot gnu.org
Ever confirmed|0 |1
Known to fail| |5.3.1, 6.0
--- Comment #4 from ktkachov at gcc dot gnu.org ---
Confirmed on 5.3 and trunk.
The reduced testcase for me is:
struct mntent
{
char mnt_fsname;
char mnt_opts;
} * a;
void gp_port_info_set_type ();
char *strstr ();
int *setmntent ();
struct mntent *getmntent ();
void
gp_port_library_list_mntent_1 (int p1)
{
int *b = setmntent ();
while (a = getmntent (b))
if (strstr ("") || strstr () || strstr ("fuse") || strstr ("nfs")
|| strstr ("autofs") || strstr ("devtmpfs") || strstr ("devpts")
|| strstr ("sysfs") || strstr ("gphotofs")
|| strstr (gp_port_library_list_mntent_1, "autofs")
|| strstr (gp_port_library_list_mntent_1, "nfs") || a->mnt_opts)
if (strstr (&a->mnt_fsname))
gp_port_info_set_type (p1);
getmntent (b);
if (strstr ("") || strstr ("fuse") || strstr ("nfs") || strstr ("autofs")
|| strstr () || strstr ("devtmpfs") || strstr ("devpts")
|| strstr ("sysfs") || strstr ("gphotofs") || strstr (a, "autofs", ""))
gp_port_info_set_type ();
}
ICEs with -O2 -g -S -mabi=ilp32.
Funnily enough this reduced testcase ICEs on 4.9 as well but in a completely
different way in tree_ssa_dse.
>From gcc-bugs-return-521852-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 16:36:59 2016
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From: "howarth.at.gcc at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/70624] [6 Regression] Several hundred asan failures with 6.0 on x86_64-apple-darwin10.8
Date: Mon, 11 Apr 2016 16:36:00 -0000
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Jack Howarth <howarth.at.gcc at gmail dot com> changed:
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----------------------------------------------------------------------------
CC| |howarth.at.gcc at gmail dot com
--- Comment #4 from Jack Howarth <howarth.at.gcc at gmail dot com> ---
This issue goes back to http://reviews.llvm.org/D11719
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From: "vries at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/68756] [6 Regression] ICE w/ -O1 -floop-nest-optimize and isl 0.15: isl-0.15/isl_id.c:213: unable to find id
Date: Mon, 11 Apr 2016 16:49:00 -0000
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--- Comment #7 from vries at gcc dot gnu.org ---
(In reply to Arseny Solokha from comment #6)
> (In reply to vries from comment #5)
> > Failure no longer reproducible after r232812, "new scop schedule for
> > isl-0.15"
>
> There are four snippets in this PR. All except the first one (snippet 1 from
> #c0) are still reproducible w/ gcc-6.0.0-alpha20160403.
Sorry for being sloppy in formulation.
So, the first snippet is no longer reproducible.
The second snippet still reproduces with the same symptom and backtrace.
The third and fourth longer reproduce as before, but look like duplicates of PR
69728 - '[6 Regression] internal compiler error: in outer_projection_mupa, at
graphite-sese-to-poly.c:1175'
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Subject: [Bug tree-optimization/68756] [6 Regression] ICE w/ -O1 -floop-nest-optimize and isl 0.15: isl-0.15/isl_id.c:213: unable to find id
Date: Mon, 11 Apr 2016 16:55:00 -0000
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--- Comment #8 from vries at gcc dot gnu.org ---
Created attachment 38240
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38240&action=edit
tentative patch for second snippet
>From gcc-bugs-return-521855-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 17:04:00 2016
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Subject: [Bug lto/70629] New: 176.gcc fails to build with -O0 -flto with undefined reference to is_reserved_word
Date: Mon, 11 Apr 2016 17:03:00 -0000
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Bug ID: 70629
Summary: 176.gcc fails to build with -O0 -flto with undefined
reference to is_reserved_word
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: lto
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Hi,
176.gcc from SPEC2000 fails to build with trunk using -O0 -flto
for arm-linux-gnueabihf with many undefined references to is_reserved_word().
Also observed with system gcc-5.2.1 for x86_64.
However works with -O2/-O3 -flto
I am not sure if this qualifies to be a valid bug report.
Is -flto meant to work even for -O0 ?
Thanks,
Prathamesh
>From gcc-bugs-return-521856-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 17:26:26 2016
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Subject: [Bug lto/70629] 176.gcc fails to build with -O0 -flto with undefined reference to is_reserved_word
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Are you compiling 176.gcc with -std=gnu89 also?
>From gcc-bugs-return-521858-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 17:27:47 2016
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Subject: [Bug lto/70629] 176.gcc fails to build with -O0 -flto with undefined reference to is_reserved_word
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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>From gcc-bugs-return-521857-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 17:27:46 2016
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Subject: [Bug lto/70629] 176.gcc fails to build with -O0 -flto with undefined reference to is_reserved_word
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--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69197#c4 also.
>From gcc-bugs-return-521859-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 17:34:07 2016
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Subject: [Bug debug/70628] [5/6 regression] ICE in get_reg_rtx, at emit-rtl.c:1025
Date: Mon, 11 Apr 2016 17:34:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Andreas Schwab from comment #2)
> a714a09ad18ee606064bbaac690ab1c8121dcc31 is the first bad commit
> commit a714a09ad18ee606064bbaac690ab1c8121dcc31
> Author: mkuvyrkov <mkuvyrkov@138bc75d-0d04-0410-961f-82ee72b054a4>
> Date: Fri Oct 24 08:22:12 2014 +0000
>
> git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@216620
> 138bc75d-0d04-0410-961f-82ee72b054a4
Since that is just a scheduler change, it exposes the latent bug. Now the
problem is most likely related to Pmode != ptrmode (this is correct here but
the var-tracking code does not do the correct thing).
>From gcc-bugs-return-521860-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 17:35:44 2016
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Subject: [Bug sanitizer/65479] sanitizer stack trace missing frames past #0 on powerpc64
Date: Mon, 11 Apr 2016 17:35:00 -0000
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Bill Schmidt <wschmidt at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-11
Ever confirmed|0 |1
--- Comment #16 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Unfortunately, that does not appear to be sufficient to solve any of the extant
ASAN failures. I'm suspicious that fast unwinding is still being disabled
somewhere. In any case, we need the backport; but we seem to need something
else as well.
Confirmed, in any case.
>From gcc-bugs-return-521861-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 17:37:51 2016
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Subject: [Bug c++/70620] possible wrong code at -Os on x86_64-linux-gnu for C++ code with multiple inheritance and casting
Date: Mon, 11 Apr 2016 17:37:00 -0000
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--- Comment #3 from Zhendong Su <su at cs dot ucdavis.edu> ---
(In reply to Jonathan Wakely from comment #2)
> Your code is equivalent to:
>
> delete reinterpret_cast<D *>(static_cast<B1 *>(new E));
>
> which means the conversion is not done safely, and you get a D* that doesn't
> point to the D subobject.
>
> Compare:
>
> E* e = new E;
> std::cout << (D*)e << '\n' << (B1*)e << '\n' << (D*)(B1*)e << '\n';
>
> The expression (D*)(B1*)e is not the same as (D*)e, i.e. it does not produce
> the address of the D subobject.
Thanks Jonathan. That's what I had thought, but the change in behavior caused
me to wonder.
>From gcc-bugs-return-521862-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 17:54:08 2016
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Subject: [Bug c++/70620] possible wrong code at -Os on x86_64-linux-gnu for C++ code with multiple inheritance and casting
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
FYI, the change in behavior is that ipa-devirt or what changes the destructor
call into __builtin_unreachable () and anything can happen then.
>From gcc-bugs-return-521863-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 18:12:48 2016
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Subject: [Bug lto/70629] 176.gcc fails to build with -O0 -flto with undefined reference to is_reserved_word
Date: Mon, 11 Apr 2016 18:12:00 -0000
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--- Comment #3 from prathamesh3492 at gcc dot gnu.org ---
Compiling with -std=gnu89 worked, thanks!
Regards,
Prathamesh
>From gcc-bugs-return-521864-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 18:18:14 2016
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Subject: [Bug c/69197] Can't compile older
Date: Mon, 11 Apr 2016 18:18:00 -0000
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prathamesh3492 at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
CC| |prathamesh3492 at gcc dot gnu.org
--- Comment #7 from prathamesh3492 at gcc dot gnu.org ---
*** Bug 70629 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-521865-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 18:18:14 2016
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Subject: [Bug lto/70629] 176.gcc fails to build with -O0 -flto with undefined reference to is_reserved_word
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prathamesh3492 at gcc dot gnu.org changed:
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--- Comment #4 from prathamesh3492 at gcc dot gnu.org ---
oops this also failed to build with only -O0 (i tried -O0 -flto and -O2 -flto),
This was totally irrelevant to LTO. Sorry for the noise.
Thanks,
Prathamesh
*** This bug has been marked as a duplicate of bug 69197 ***
>From gcc-bugs-return-521866-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 18:32:54 2016
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Subject: [Bug c++/70613] -fabi-version docs don't match implementation
Date: Mon, 11 Apr 2016 18:32:00 -0000
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--- Comment #1 from Jim Wilson <wilson at gcc dot gnu.org> ---
I see that the patch for bug 65945 was back ported to the gcc-5 branch, which
required a partial backport of the patch for bug 44282, which added abi version
9. The original patch for 44282 is missing the doc change.
The missing doc change was then added here
https://gcc.gnu.org/viewcvs/gcc?view=revision&revision=228017
which has the invoke.texi hunk we need, but is missing a ChangeLog entry for
it. So it appears all we need is a partial backport of this invoke.texi hunk.
This is mostly documenting a change to -Wabi, so we only need parts of two
hunks that document -fabi-version=9 and mention gcc-5.2.
>From gcc-bugs-return-521867-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 18:51:41 2016
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Subject: [Bug target/70630] New: [6 regression] sparc bootstrap failure: sparc.c:4919:6: error: suggest explicit braces to avoid ambiguous 'else'
Date: Mon, 11 Apr 2016 18:51:00 -0000
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Bug ID: 70630
Summary: [6 regression] sparc bootstrap failure:
sparc.c:4919:6: error: suggest explicit braces to
avoid ambiguous 'else'
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: mikpelinux at gmail dot com
Target Milestone: ---
Attempting to bootstrap gcc-6-20160410 on sparc-linux fails with:
/mnt/scratch/gcc-6-20160410/gcc/config/sparc/sparc.c: In function 'long long
int sparc_compute_frame_size(long long int, int)':
/mnt/scratch/gcc-6-20160410/gcc/config/sparc/sparc.c:4919:6: error: suggest
explicit braces to avoid ambiguous 'else' [-Werror=parentheses]
if (TARGET_ARCH64)
^
cc1plus: all warnings being treated as errors
make[3]: *** [sparc.o] Error 1
make[3]: *** Waiting for unfinished jobs....
make[3]: Leaving directory `/mnt/scratch/objdir6/gcc'
make[2]: *** [all-stage2-gcc] Error 2
make[2]: Leaving directory `/mnt/scratch/objdir6'
make[1]: *** [stage2-bubble] Error 2
make[1]: Leaving directory `/mnt/scratch/objdir6'
make: *** [bootstrap] Error 2
What it's complaining about is:
if (TARGET_ARCH64)
for (i = 0; i < 8; i++)
if (save_global_or_fp_reg_p (i, 0))
n_global_fp_regs += 2;
else
for (i = 0; i < 8; i += 2)
if (save_global_or_fp_reg_p (i, 0) || save_global_or_fp_reg_p (i + 1, 0))
n_global_fp_regs += 2;
which seems highly dubious to me (the else should probably go with the outer
not the inner if).
gcc-6-20160403 bootstrapped fine. Strangely enough, it contains the exact same
code here, so I don't know why gcc didn't complain before.
Configured as:
/mnt/scratch/gcc-6-20160410/configure --prefix=/mnt/scratch/install6
--with-gmp=/home/mikpe/pkgs/linux-sparc64/gmp-6.1.0
--with-mpfr=/home/mikpe/pkgs/linux-sparc64/mpfr-3.1.4
--with-mpc=/home/mikpe/pkgs/linux-sparc64/mpc-1.0.3 --enable-multilib
--disable-plugin --disable-lto --disable-nls --enable-threads=posix
--enable-checking=release --disable-libmudflap --enable-languages=c,ada,c++
--build=sparc-unknown-linux --target=sparc-unknown-linux --with-cpu=ultrasparc
--enable-targets=all
>From gcc-bugs-return-521868-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 19:26:19 2016
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From: "vittorio.romeo at outlook dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70631] New: Warn about redundant comparisons with -Wlogical-op
Date: Mon, 11 Apr 2016 19:26:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70631
Bug ID: 70631
Summary: Warn about redundant comparisons with -Wlogical-op
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: enhancement
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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https://godbolt.org/g/Tt8hfe
int main()
{
int x = 0;
// warning: logical 'or' of collectively exhaustive tests is always true
[-Wlogical-op]
if(x != 5 || x != 6) { }
// warning: logical 'and' of mutually exclusive tests is always false
[-Wlogical-op]
if(x == 5 && x == 6) { }
// no warnings
if(true || x == 10) { }
if(false && x == 10) { }
// no warnings
if(x == 5 || x != 6) { } // x==5 is redundant
if(x == 5 && x != 6) { } // x!=6 is redundant
}
I think gcc should warn about the redundant comparisons with -Wlogical-op.
More information:
https://www.reddit.com/r/cpp/comments/4e9kf1/logical_expressions_in_cc_mistakes_made_by/
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Subject: [Bug target/70381] On powerpc, -mfloat128 is on by default for all VSX systems
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--- Comment #7 from Michael Meissner <meissner at gcc dot gnu.org> ---
Author: meissner
Date: Mon Apr 11 19:45:35 2016
New Revision: 234884
URL: https://gcc.gnu.org/viewcvs?rev=234884&root=gcc&view=rev
Log:
[gcc]
2016-04-11 Michael Meissner <meissner@linux.vnet.ibm.com>
PR target/70381
* config/rs6000/rs6000.c (rs6000_opt_masks): Disable using the
target attribute and pragma from changing the -mfloat128
and -mfloat128-hardware options.
* doc/extend.texi (Additional Floating Types): Document PowerPC
__float128 restrictions.
[libgcc]
2016-04-11 Michael Meissner <meissner@linux.vnet.ibm.com>
PR target/70381
* configure.ac (powerpc*-*-linux*): Rework tests to build
__float128 emulation routines to not depend on using #pragma GCC
target to enable -mfloat128.
* configure: Regnerate.
[gcc/testsuite]
2016-04-11 Michael Meissner <meissner@linux.vnet.ibm.com>
PR target/70381
* gcc.target/powerpc/float128-1.c: New tests to make sure the
__float128 emulator is built and runs.
* gcc.target/powerpc/float128-1.c: Likewise.
* lib/target-supports.exp (check_ppc_float128_sw_available):
Rework tests for __float128 software and hardware
availability. Fix exit condition to return 0 on success.
Added:
trunk/gcc/testsuite/gcc.target/powerpc/float128-1.c
trunk/gcc/testsuite/gcc.target/powerpc/float128-2.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/rs6000/rs6000.c
trunk/gcc/doc/extend.texi
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/lib/target-supports.exp
trunk/libgcc/ChangeLog
trunk/libgcc/configure
trunk/libgcc/configure.ac
>From gcc-bugs-return-521870-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 19:48:38 2016
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Subject: [Bug c++/70632] New: Wrong function name resolution using variadic template and additional template parameters
Date: Mon, 11 Apr 2016 19:48:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70632
Bug ID: 70632
Summary: Wrong function name resolution using variadic template
and additional template parameters
Product: gcc
Version: 5.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: grumpy76 at web dot de
Target Milestone: ---
GCC Version
--------------------
g++ (GCC) 4.9.2 20150212 (Red Hat 4.9.2-6) - devtoolset 3
g++ (GCC) 5.2.1 20150902 (Red Hat 5.2.1-2) - devtoolset 4
System
------
CentOS Linux release 7.2.1511 (Core)
Command line to compile
-----------------------
g++ -std=c++11 -Wall -Wextra -pedantic
Minimal code to reproduce
-------------------------
#include <iostream>
#include <sstream>
#include <string>
template<typename T>
std::ostringstream& appendToStream(std::ostringstream& stream, const T&
value) {
stream << value;
return stream;
}
template<typename T, typename... Args>
std::ostringstream& appendToStream(std::ostringstream& stream, const T&
value, Args... args) {
stream << value;
return appendToStream(stream, args...);
}
template<typename... Args>
std::string createMessage(Args... args) {
std::ostringstream x;
appendToStream(x, args...);
return x.str();
}
template<typename... Args>
std::string foo(int, Args... args) {
return std::string("foo with int: " + createMessage(args...));
}
template<typename... Args>
std::string foo(Args... args) {
return std::string("foo without int: " +
createMessage(args...));
}
template<typename T, typename... Args>
std::string bar(int, Args... args) {
return std::string("bar with int: " + createMessage(args...));
}
template<typename T, typename... Args>
std::string bar(Args... args) {
return std::string("bar without int: " +
createMessage(args...));
}
int main(int, char**) {
int i(-1);
std::cout << foo(i, "Hello ", "world") << std::endl;
std::cout << foo("Hello ", "world") << std::endl;
std::cout << bar<float>(i, "Hello ", "world") << std::endl;
std::cout << bar<float>("Hello ", "world") << std::endl;
}
Output is
---------
foo with int: Hello world
foo without int: Hello world
bar without int: -1Hello world
bar without int: Hello world
Output expected
---------------
foo with int: Hello world
foo without int: Hello world
bar with int: Hello world
bar without int: Hello world
Comments
--------
Code works as expected with
- g++ (GCC) 4.8.5 20150623 (Red Hat 4.8.5-4)
- clang version 3.4.2 (tags/RELEASE_34/dot2-final)
- clang version 3.8.0 (tags/RELEASE_380/final)
- msvc-14.0 (19.00.23918)
>From gcc-bugs-return-521871-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 19:55:07 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70630] [6 regression] sparc bootstrap failure: sparc.c:4919:6: error: suggest explicit braces to avoid ambiguous 'else'
Date: Mon, 11 Apr 2016 19:55:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-11
CC| |ebotcazou at gcc dot gnu.org,
| |jakub at gcc dot gnu.org
Target Milestone|--- |6.0
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
That is because the warning is new (well, old-new, it existed for C a decade
ago or so).
At least from the code indentation it seems the right fix is to add braces that
will match the formatting, but it needs to be tested.
The bug has been introduced in r174897 it seems.
>From gcc-bugs-return-521872-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 20:42:52 2016
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From: "su at cs dot ucdavis.edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/70633] New: ICE on valid code at -Os (in 32-bit mode) on x86_64-linux-gnu: output_operand: invalid expression as operand
Date: Mon, 11 Apr 2016 20:42:00 -0000
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Bug ID: 70633
Summary: ICE on valid code at -Os (in 32-bit mode) on
x86_64-linux-gnu: output_operand: invalid expression
as operand
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: su at cs dot ucdavis.edu
Target Milestone: ---
The following code causes an ICE when compiled with the current GCC trunk (and
5.x) at -Os on x86_64-linux-gnu in the 32-bit mode.
This is a regression from 4.9.x.
$ gcc-trunk -v
Using built-in specs.
COLLECT_GCC=gcc-trunk
COLLECT_LTO_WRAPPER=/usr/local/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/6.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto
--prefix=/usr/local/gcc-trunk --disable-bootstrap
Thread model: posix
gcc version 6.0.0 20160411 (experimental) [trunk revision 234874] (GCC)
$
$ gcc-trunk -m32 -O0 small.c
$ gcc-4.9 -m32 -Os small.c
$
$ gcc-trunk -m32 -Os small.c
small.c: In function ‘main’:
small.c:10:1: internal compiler error: output_operand: invalid expression as
operand
}
^
0x8610c3 output_operand_lossage(char const*, ...)
../../gcc-source-trunk/gcc/final.c:3409
0x861a0d output_addr_const(_IO_FILE*, rtx_def*)
../../gcc-source-trunk/gcc/final.c:3998
0xe5291e assemble_integer_with_op(char const*, rtx_def*)
../../gcc-source-trunk/gcc/varasm.c:2668
0xe52975 default_assemble_integer(rtx_def*, unsigned int, int)
../../gcc-source-trunk/gcc/varasm.c:2684
0xe529fa assemble_integer(rtx_def*, unsigned int, unsigned int, int)
../../gcc-source-trunk/gcc/varasm.c:2700
0xe59339 output_constant
../../gcc-source-trunk/gcc/varasm.c:4749
0xe5b3ed output_constant
../../gcc-source-trunk/gcc/varasm.c:5003
0xe5b3ed output_constructor_regular_field
../../gcc-source-trunk/gcc/varasm.c:5006
0xe5b3ed output_constructor
../../gcc-source-trunk/gcc/varasm.c:5276
0xe59be0 assemble_constant_contents
../../gcc-source-trunk/gcc/varasm.c:3381
0xe624e4 output_constant_def_contents
../../gcc-source-trunk/gcc/varasm.c:3426
0xe62768 mark_constants_in_pattern
../../gcc-source-trunk/gcc/varasm.c:3951
0xe628db mark_constants
../../gcc-source-trunk/gcc/varasm.c:3983
0xe628db mark_constant_pool
../../gcc-source-trunk/gcc/varasm.c:3999
0xe628db output_constant_pool
../../gcc-source-trunk/gcc/varasm.c:4040
0xe628db assemble_start_function(tree_node*, char const*)
../../gcc-source-trunk/gcc/varasm.c:1726
0x864909 rest_of_handle_final
../../gcc-source-trunk/gcc/final.c:4439
0x864909 execute
../../gcc-source-trunk/gcc/final.c:4516
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
$
------------------------------------------------------------
int a;
int main ()
{
int __attribute__ ((vector_size (4 * sizeof (int)))) b =
{ (int) main, 0, 0, 0 };
if (&b + a)
__builtin_abort ();
return 0;
}
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Subject: [Bug c++/70594] [6 Regression] -fcompare-debug failure
Date: Mon, 11 Apr 2016 20:47:00 -0000
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--- Comment #17 from Jason Merrill <jason at gcc dot gnu.org> ---
I still don't understand why/how this is causing problems, if -fcompare-debug
only cares about the order of decls. The copied decls shouldn't appear
anywhere in the output, and other decls should still have the same order.
>From gcc-bugs-return-521874-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 21:14:27 2016
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Subject: [Bug c++/70594] [6 Regression] -fcompare-debug failure
Date: Mon, 11 Apr 2016 21:14:00 -0000
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--- Comment #18 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
For the testcases in this PR probably:
--- gcc/tree-sra.c 2016-04-09 13:21:06.111510703 +0200
+++ gcc/tree-sra.c 2016-04-11 23:11:41.253126047 +0200
@@ -1537,17 +1537,12 @@ compare_access_positions (const void *a,
static void
make_fancy_decl_name (tree decl)
{
- char buffer[32];
-
tree name = DECL_NAME (decl);
if (name)
obstack_grow (&name_obstack, IDENTIFIER_POINTER (name),
IDENTIFIER_LENGTH (name));
else
- {
- sprintf (buffer, "D%u", DECL_UID (decl));
- obstack_grow (&name_obstack, buffer, strlen (buffer));
- }
+ obstack_grow (&name_obstack, "Dxxxx", 5);
}
/* Helper for make_fancy_name. */
or something similar would be enough (or do that only for flag_dump_final_insns
!= NULL?). But the #c0 report suggests this affects more than that, but only
Tobias has the reproducer that.
>From gcc-bugs-return-521875-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 21:20:16 2016
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Subject: [Bug c++/70627] [6 Regression] internal compiler error: verify_type failed
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jason at gcc dot gnu.org
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Reduced testcase (-O2 -g):
struct D;
struct A
{
D *operator->();
};
struct B
{
template <typename... T> void foo (T &&...) {}
};
typedef unsigned char G;
enum class H : G;
struct C
{
};
struct D : C
{
B foo () const { B a; a.foo (d); }
H d;
};
struct F : C
{
void foo ();
A f;
};
enum class H : unsigned char;
void F::foo () { B b = f->foo (); }
>From gcc-bugs-return-521876-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 21:21:17 2016
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Subject: [Bug c++/70610] [6 regression] error: invalid initialization of non-const reference of type
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Patrick Palka <ppalka at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2016-04-11
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--- Comment #5 from Patrick Palka <ppalka at gcc dot gnu.org> ---
Patch
>From gcc-bugs-return-521877-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 21:21:45 2016
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Subject: [Bug c++/70610] [6 regression] error: invalid initialization of non-const reference of type
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--- Comment #6 from Patrick Palka <ppalka at gcc dot gnu.org> ---
uhhh... here: https://gcc.gnu.org/ml/gcc-patches/2016-04/msg00482.html
>From gcc-bugs-return-521878-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 21:25:05 2016
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Subject: [Bug c++/70594] [6 Regression] -fcompare-debug failure
Date: Mon, 11 Apr 2016 21:25:00 -0000
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--- Comment #19 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
(In reply to Jason Merrill from comment #17)
> I still don't understand why/how this is causing problems, if
> -fcompare-debug only cares about the order of decls. The copied decls
> shouldn't appear anywhere in the output, and other decls should still have
> the same order.
DECL_UID escapes into the emitted names, as the fragment Jakub's just pointed
to shows. We perturb the DECL_UID's allocated, as I describe in comment 7.
Hope that helps.
>From gcc-bugs-return-521879-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 21:56:32 2016
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Subject: [Bug target/70630] [6 regression] sparc bootstrap failure: sparc.c:4919:6: error: suggest explicit braces to avoid ambiguous 'else'
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
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--- Comment #2 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> At least from the code indentation it seems the right fix is to add braces
> that will match the formatting, but it needs to be tested.
Right, the code is effectively a no-op since all global registers are
call-used, so fixing it won't change anything for code generation in the end.
> The bug has been introduced in r174897 it seems.
Ouch.
>From gcc-bugs-return-521880-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 22:31:51 2016
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Subject: [Bug c++/70634] New: ICE on valid code on x86_64-linux-gnu: Segmentation fault (program cc1plus)
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Bug ID: 70634
Summary: ICE on valid code on x86_64-linux-gnu: Segmentation
fault (program cc1plus)
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: su at cs dot ucdavis.edu
Target Milestone: ---
The following code causes an ICE when compiled with the current GCC trunk on
x86_64-linux-gnu in both 32-bit and 64-bit modes.
This is a regression from 5.3.x.
$ g++-trunk -v
Using built-in specs.
COLLECT_GCC=g++-trunk
COLLECT_LTO_WRAPPER=/usr/local/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/6.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto
--prefix=/usr/local/gcc-trunk --disable-bootstrap
Thread model: posix
gcc version 6.0.0 20160411 (experimental) [trunk revision 234874] (GCC)
$
$ g++-5.3 -c small.cpp
$ clang++ -c small.cpp
$
$ g++-trunk -c small.cpp
g++-trunk: internal compiler error: Segmentation fault (program cc1plus)
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
$
-------------------------------------------------
template < typename T >
bool foo ()
{
const int i = sizeof (i) > 1 ? sizeof (T) : 0;
return i > 0;
}
>From gcc-bugs-return-521881-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 23:22:15 2016
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Subject: [Bug tree-optimization/70357] [openacc][gomp4] ICE on reduction (+:sum) private (sum)
Date: Mon, 11 Apr 2016 23:22:00 -0000
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--- Comment #2 from cesar at gcc dot gnu.org ---
Author: cesar
Date: Mon Apr 11 23:21:28 2016
New Revision: 234889
URL: https://gcc.gnu.org/viewcvs?rev=234889&root=gcc&view=rev
Log:
gcc/
PR tree-optimization/70357
* gimplify.c (gimplify_scan_omp_clauses): Remove stale acc reduction
code.
(gimplify_adjust_omp_clauses): Add or adjust data clauses for acc
parallel reductions as necessary. Error on those that are private.
(localize_reductions_r): Delete.
(localize_reductions): Delete.
(gimplify_omp_for): Don't call localize_reductions.
(gimplify_omp_workshare): Likewise.
* omp-low.c (build_outer_var_ref): Remove stale reduction-specific
corner cases.
(fixup_remapped_decl): Likewise.
(scan_sharing_clauses): Don't install variables which are used in
acc parallel reductions.
(check_omp_nesting_restrictions): Remove stale reduction-specific
corner cases.
(scan_omp_1_stmt): Clean up whitespace.
(lower_rec_input_clauses): Remove stale reduction-specific corner
cases.
(lower_oacc_reductions): Update it to handle parallel, reference and
nested reductions.
(lower_omp_target): Don't remap variables appearing in acc parallel
reductions.
* tree-core.h (enum omp_clause_code): Remove stale comments about
the fifth reduction clause operand.
* tree.c (omp_clause_num_ops): Set the number of reduction clause
operands to 5.
(walk_tree_1): Update error checking for the reduction clause.
* tree.h (OMP_CLAUSE_MAP_IN_REDUCTION): New macro.
Modified:
branches/gomp-4_0-branch/gcc/ChangeLog.gomp
branches/gomp-4_0-branch/gcc/gimplify.c
branches/gomp-4_0-branch/gcc/omp-low.c
branches/gomp-4_0-branch/gcc/tree-core.h
branches/gomp-4_0-branch/gcc/tree.c
branches/gomp-4_0-branch/gcc/tree.h
>From gcc-bugs-return-521882-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 11 23:25:03 2016
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From: "cesar at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/70357] [openacc][gomp4] ICE on reduction (+:sum) private (sum)
Date: Mon, 11 Apr 2016 23:25:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70357
cesar at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #3 from cesar at gcc dot gnu.org ---
This issue has been resolved in r234889. Note that private reductions are now
reported as errors.
>From gcc-bugs-return-521883-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 02:14:46 2016
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From: "asolokha at gmx dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/70625] [4.9/5 Regression] Memory exhaustion when building specific snippet at -O2
Date: Tue, 12 Apr 2016 02:14:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70625
--- Comment #4 from Arseny Solokha <asolokha at gmx dot com> ---
1. % armv7a-hardfloat-linux-gnueabihf-gcc-4.9.3 -v
Using built-in specs.
COLLECT_GCC=armv7a-hardfloat-linux-gnueabihf-gcc-4.9.3
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/armv7a-hardfloat-linux-gnueabihf/4.9.3/lto-wrapper
Target: armv7a-hardfloat-linux-gnueabihf
Configured with:
/var/tmp/portage/cross-armv7a-hardfloat-linux-gnueabihf/gcc-4.9.3/work/gcc-4.9.3/configure
--host=x86_64-pc-linux-gnu --target=armv7a-hardfloat-linux-gnueabihf
--build=x86_64-pc-linux-gnu --prefix=/usr
--bindir=/usr/x86_64-pc-linux-gnu/armv7a-hardfloat-linux-gnueabihf/gcc-bin/4.9.3
--includedir=/usr/lib/gcc/armv7a-hardfloat-linux-gnueabihf/4.9.3/include
--datadir=/usr/share/gcc-data/armv7a-hardfloat-linux-gnueabihf/4.9.3
--mandir=/usr/share/gcc-data/armv7a-hardfloat-linux-gnueabihf/4.9.3/man
--infodir=/usr/share/gcc-data/armv7a-hardfloat-linux-gnueabihf/4.9.3/info
--with-gxx-include-dir=/usr/lib/gcc/armv7a-hardfloat-linux-gnueabihf/4.9.3/include/g++-v4
--with-python-dir=/share/gcc-data/armv7a-hardfloat-linux-gnueabihf/4.9.3/python
--enable-languages=c,c++ --enable-obsolete --enable-secureplt --disable-werror
--with-system-zlib --disable-nls --enable-checking=release --enable-esp
--enable-libstdcxx-time --enable-poison-system-directories
--with-sysroot=/usr/armv7a-hardfloat-linux-gnueabihf --disable-bootstrap
--enable-__cxa_atexit --enable-clocale=gnu --disable-multilib --disable-altivec
--disable-fixed-point --with-float=hard --with-arch=armv7-a --with-float=hard
--with-fpu=vfpv3-d16 --disable-libgcj --enable-libgomp --disable-libmudflap
--disable-libssp --disable-libcilkrts --disable-libquadmath --enable-lto
--with-cloog --disable-isl-version-check --enable-libsanitizer
Thread model: posix
gcc version 4.9.3
Memory hog.
2. % armv7m-softfloat-eabi-gcc-5.3.0 -v
Using built-in specs.
COLLECT_GCC=armv7m-softfloat-eabi-gcc-5.3.0
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/armv7m-softfloat-eabi/5.3.0/lto-wrapper
Target: armv7m-softfloat-eabi
Configured with:
/var/tmp/portage/cross-armv7m-softfloat-eabi/gcc-5.3.0/work/gcc-5.3.0/configure
--host=x86_64-pc-linux-gnu --target=armv7m-softfloat-eabi
--build=x86_64-pc-linux-gnu --prefix=/usr
--bindir=/usr/x86_64-pc-linux-gnu/armv7m-softfloat-eabi/gcc-bin/5.3.0
--includedir=/usr/lib/gcc/armv7m-softfloat-eabi/5.3.0/include
--datadir=/usr/share/gcc-data/armv7m-softfloat-eabi/5.3.0
--mandir=/usr/share/gcc-data/armv7m-softfloat-eabi/5.3.0/man
--infodir=/usr/share/gcc-data/armv7m-softfloat-eabi/5.3.0/info
--with-gxx-include-dir=/usr/lib/gcc/armv7m-softfloat-eabi/5.3.0/include/g++-v5
--with-python-dir=/share/gcc-data/armv7m-softfloat-eabi/5.3.0/python
--enable-languages=c --enable-obsolete --enable-secureplt --disable-werror
--with-system-zlib --disable-nls --enable-checking=release
--enable-poison-system-directories --disable-shared --disable-libatomic
--disable-threads --without-headers --disable-bootstrap --with-newlib
--enable-multilib --disable-altivec --disable-fixed-point --with-float=soft
--with-arch=armv7-m --with-mode=thumb --disable-libgcj --disable-libgomp
--disable-libmudflap --disable-libssp --disable-libcilkrts
--disable-libquadmath --enable-lto --with-isl --disable-isl-version-check
--disable-libsanitizer
Thread model: single
gcc version 5.3.0
Successful compilation.
>From gcc-bugs-return-521884-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 03:37:40 2016
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From: "su at cs dot ucdavis.edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70635] New: ICE on (and rejects) valid code on x86_64-linux-gnu: Segmentation fault (program cc1plus)
Date: Tue, 12 Apr 2016 03:37:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70635
Bug ID: 70635
Summary: ICE on (and rejects) valid code on x86_64-linux-gnu:
Segmentation fault (program cc1plus)
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: su at cs dot ucdavis.edu
Target Milestone: ---
The following code causes an ICE when compiled with the current GCC trunk (and
4.9.x and later) on x86_64-linux-gnu in both 32-bit and 64-bit modes.
The code does not cause an ICE for 4.8.x (and earlier), but is rejected. It
looks valid and is accepted by clang.
$ g++-trunk -v
Using built-in specs.
COLLECT_GCC=g++-trunk
COLLECT_LTO_WRAPPER=/usr/local/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/6.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto
--prefix=/usr/local/gcc-trunk --disable-bootstrap
Thread model: posix
gcc version 6.0.0 20160411 (experimental) [trunk revision 234874] (GCC)
$
$ g++-trunk -c small.cpp
small.cpp:11:37: error: declaration of ‘typedef typename A<typename
A<T>::B::type>::type A<T>::B::type’ -fpermissive]
typedef typename A < type >::type type;
^~~~
small.cpp:5:28: error: changes meaning of ‘type’ from ‘typedef typename
A<T>::B::type A<T>::type’ [-fpermissive]
typedef typename B::type type;
^~~~
g++-trunk: internal compiler error: Segmentation fault (program cc1plus)
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
$
$ g++-4.8 -c small.cpp
small.cpp:11:37: error: declaration of ‘typedef typename A<typename
A<T>::B::type>::type A<T>::B::type’ [-fpermissive]
typedef typename A < type >::type type;
^
small.cpp:5:28: error: changes meaning of ‘type’ from ‘typedef typename
A<T>::B::type A<T>::type’ [-fpermissive]
typedef typename B::type type;
^
$
$ clang++-trunk -c small.cpp -Weverything
$
------------------------------------------------
template < typename T >
struct A
{
struct B;
typedef typename B::type type;
};
template < typename T >
struct A < T >::B
{
typedef typename A < type >::type type;
type Foo ();
};
template < typename T >
typename A < T >::B::type
A < T >::B::Foo ()
{
return 0;
}
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From: "jan.smets@alcatel-lucent.com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70617] internal compiler error: Segmentation fault
Date: Tue, 12 Apr 2016 04:26:00 -0000
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--- Comment #5 from Jan Smets <jan.smets@alcatel-lucent.com> ---
Reduced test case by creduce
struct UINT;
typedef struct { UINT TYPES } eType;
fn1(eType) {
gcc version 5.3.1 20160411 (GCC)
= gcc-5-branch @ 0efe1cc72d37ff1173b52cf6bc3f17bd0ccb59f3
target = x86_64-unknown-linux-gnu
compile with : -xc++ -c testcase.best -o /dev/null -m32 -w
>From gcc-bugs-return-521886-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 04:50:01 2016
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From: "felix.esch.42+dev at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/69775] thread_local extern variable causes linkage error
Date: Tue, 12 Apr 2016 04:50:00 -0000
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felix.esch.42+dev at gmail dot com <felix.esch.42+dev at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |felix.esch.42+dev at gmail dot com
--- Comment #1 from felix.esch.42+dev at gmail dot com <felix.esch.42+dev at gmail dot com> ---
Created attachment 38241
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38241&action=edit
minimal example with --save-tems
Run with: g++ -std=c++14 tls-error.cpp tls-main.cpp -o tls-error
d
This is a minimal example. The extra header / cpp unit is necesary and
compiling all in one compilation unit does not trigger this error.
Using -std=c++11 does not change the behaviour.
Running the command above yields no executable file and the following output:
/tmp/ccyxWUc5.o: In function `TLS wrapper function for A::var':
tls-main.cpp:(.text._ZTWN1A3varE[_ZTWN1A3varE]+0x5): undefined reference to
`TLS init function for A::var'
collect2: error: ld returned 1 exit status
I use gcc v 5.3 on 64 bit arch linux:
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-unknown-linux-gnu/5.3.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: /build/gcc/src/gcc-5-20160209/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 --disable-multilib --disable-werror
--enable-checking=release
Thread model: posix
gcc version 5.3.0 (GCC)
>From gcc-bugs-return-521887-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 07:15:37 2016
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From: "dvyukov at google dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug sanitizer/64354] no preprocessor symbol __SANITIZE_THREAD__
Date: Tue, 12 Apr 2016 07:15:00 -0000
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--- Comment #1 from Dmitry Vyukov <dvyukov at google dot com> ---
We've hit this issue while implementing Go support for C++ ThreadSanitizer:
https://github.com/golang/go/issues/14602
__has_feature obviously does not work. Providing __SANITIZE_THREAD__ looks very
reasonable since we provide __SANITIZE_ADDRESS__.
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Subject: [Bug target/70633] [5/6 Regression] ICE on valid code at -Os (in 32-bit mode) on x86_64-linux-gnu: output_operand: invalid expression as operand
Date: Tue, 12 Apr 2016 07:27:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-12
CC| |jakub at gcc dot gnu.org
Target Milestone|--- |5.4
Summary|ICE on valid code at -Os |[5/6 Regression] ICE on
|(in 32-bit mode) on |valid code at -Os (in
|x86_64-linux-gnu: |32-bit mode) on
|output_operand: invalid |x86_64-linux-gnu:
|expression as operand |output_operand: invalid
| |expression as operand
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r215461.
>From gcc-bugs-return-521889-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 07:35:21 2016
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Subject: [Bug c++/70634] [4.9/5/6 Regression] ICE on valid code on x86_64-linux-gnu: Segmentation fault (program cc1plus)
Date: Tue, 12 Apr 2016 07:35:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-12
CC| |jakub at gcc dot gnu.org,
| |jason at gcc dot gnu.org
Target Milestone|--- |4.9.4
Summary|ICE on valid code on |[4.9/5/6 Regression] ICE on
|x86_64-linux-gnu: |valid code on
|Segmentation fault (program |x86_64-linux-gnu:
|cc1plus) |Segmentation fault (program
| |cc1plus)
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Seems to be endless recursion in value_dependent_expression_p, most likely
started with r196983.
>From gcc-bugs-return-521890-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 07:45:46 2016
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Subject: [Bug target/70107] ICE: in emit_move_insn, at expr.c:3546 with -mcpu=power8
Date: Tue, 12 Apr 2016 07:45:00 -0000
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Alan Modra <amodra at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-12
CC| |amodra at gmail dot com,
| |ppalka at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #5 from Alan Modra <amodra at gmail dot com> ---
This is actually a duplicate of pr70096. My debug session shows that
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70096#c3 applies here too. The
pr70096 patch applied to mainline fixes the testcase in this bugzilla when
applied to gcc-5 and gcc-4.9 branches.
I'm about to do a full bootstrap and regression test on powerpc64le-linux.
>From gcc-bugs-return-521891-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 07:59:01 2016
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Subject: [Bug tree-optimization/68756] [6 Regression] ICE w/ -O1 -floop-nest-optimize and isl 0.15: isl-0.15/isl_id.c:213: unable to find id
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vries at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |patch
--- Comment #9 from vries at gcc dot gnu.org ---
https://gcc.gnu.org/ml/gcc-patches/2016-04/msg00490.html
>From gcc-bugs-return-521892-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 08:13:22 2016
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Subject: [Bug c++/70635] [4.9/5/6 Regression] ICE on (and rejects) valid code on x86_64-linux-gnu: Segmentation fault (program cc1plus)
Date: Tue, 12 Apr 2016 08:13:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-12
CC| |jakub at gcc dot gnu.org,
| |paolo at gcc dot gnu.org
Target Milestone|--- |4.9.4
Summary|ICE on (and rejects) valid |[4.9/5/6 Regression] ICE on
|code on x86_64-linux-gnu: |(and rejects) valid code on
|Segmentation fault (program |x86_64-linux-gnu:
|cc1plus) |Segmentation fault (program
| |cc1plus)
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
With -fpermissive -std=c++98 just warnings instead of errors are emitted, and
the ICE starts with r204339.
>From gcc-bugs-return-521893-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 08:28:42 2016
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Subject: [Bug target/70107] ICE: in emit_move_insn, at expr.c:3546 with -mcpu=power8
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--- Comment #6 from Alan Modra <amodra at gmail dot com> ---
Bootstrap and regression testing completed for both gcc-4.9 and gcc-5 branch
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Subject: [Bug c++/70594] [6 Regression] -fcompare-debug failure
Date: Tue, 12 Apr 2016 08:47:00 -0000
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--- Comment #20 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Tobias, could you try your to reproduce your #c0 issue, with a debugging patch
like:
--- gcc/tree.c.jj 2016-03-11 17:37:42.000000000 +0100
+++ gcc/tree.c 2016-04-12 10:43:10.463675009 +0200
@@ -981,6 +981,9 @@ record_node_allocation_statistics (enum
tree_node_sizes[(int) kind] += length;
}
+int in_build_decl = 0;
+int in_constexpr_handling = 0;
+
/* Allocate and return a new UID from the DECL_UID namespace. */
int
@@ -1032,6 +1035,12 @@ make_node_stat (enum tree_code code MEM_
else
{
DECL_UID (t) = allocate_decl_uid ();
+if (!in_build_decl)
+{
+FILE *f = fopen ("/tmp/uids", "a");
+fprintf (f, "\"<unnamed>\" %s %u %d 1\n", get_tree_code_name (code), DECL_UID
(t), in_constexpr_handling);
+fclose (f);
+}
SET_DECL_PT_UID (t, -1);
}
if (TREE_CODE (t) == LABEL_DECL)
@@ -1154,6 +1163,11 @@ copy_node_stat (tree node MEM_STAT_DECL)
else
{
DECL_UID (t) = allocate_decl_uid ();
+{
+FILE *f = fopen ("/tmp/uids", "a");
+fprintf (f, "\"%s\" %s %u %d 2\n", DECL_NAME (node) ? IDENTIFIER_POINTER
(DECL_NAME (node)) : "<unnamed>", get_tree_code_name (code), DECL_UID (t),
in_constexpr_handling);
+fclose (f);
+}
if (DECL_PT_UID_SET_P (node))
SET_DECL_PT_UID (t, DECL_PT_UID (node));
}
@@ -4721,9 +4735,20 @@ build_decl_stat (location_t loc, enum tr
{
tree t;
+in_build_decl = 1;
+int prev_uid = next_decl_uid;
+
t = make_node_stat (code PASS_MEM_STAT);
DECL_SOURCE_LOCATION (t) = loc;
+in_build_decl = 0;
+if (prev_uid != next_decl_uid)
+{
+FILE *f = fopen ("/tmp/uids", "a");
+fprintf (f, "\"%s\" %s %u %d 3\n", name ? IDENTIFIER_POINTER (name) :
"<unnamed>", get_tree_code_name (code), DECL_UID (t), in_constexpr_handling);
+fclose (f);
+}
+
/* if (type == error_mark_node)
type = integer_type_node; */
/* That is not done, deliberately, so that having error_mark_node
--- gcc/cp/constexpr.c.jj 2016-04-09 13:21:08.000000000 +0200
+++ gcc/cp/constexpr.c 2016-04-12 10:37:34.274308652 +0200
@@ -1463,6 +1463,9 @@ cxx_eval_call_expression (const constexp
gcc_assert (DECL_SAVED_TREE (fun));
tree body, parms, res;
+extern int in_constexpr_handling;
+in_constexpr_handling++;
+
/* Reuse or create a new unshared copy of this function's body. */
fundef_copy *copy = get_fundef_copy (fun);
body = copy->body;
@@ -1545,6 +1548,7 @@ cxx_eval_call_expression (const constexp
/* Make the unshared function copy we used available for re-use. */
save_fundef_copy (fun, copy);
+in_constexpr_handling--;
}
if (result == error_mark_node)
Either by running the driver with -fcompare-debug -v first, and then
rm /tmp/uids
paste one cc1plus invocation
mv /tmp/uids{,2}
paste the second cc1plus invocation
And then try to figure out (if in the -fdump-final-insns the yyreduce/yyerrlab
vars are still shifted around) if there are any hints on what is going on with
those in the log file?
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Subject: [Bug c++/70594] [6 Regression] -fcompare-debug failure
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--- Comment #21 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Or by adding another printout (say
{
FILE *f = fopen ("/tmp/uids", "a");
fprintf (f, "=======================\n");
fclose (f);
}
somehwere to toplev.c (main) early on, so that you can run it all from the
driver and just split the file afterwards.
>From gcc-bugs-return-521896-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 09:09:32 2016
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Subject: [Bug rtl-optimization/70602] [6 Regression] wrong code at -O1 and above on x86_64-linux-gnu in 32-bit mode (and at -Os only in 64-bit mode)
Date: Tue, 12 Apr 2016 09:09:00 -0000
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Apr 12 09:08:43 2016
New Revision: 234895
URL: https://gcc.gnu.org/viewcvs?rev=234895&root=gcc&view=rev
Log:
PR tree-optimization/70602
* tree-sra.c (generate_subtree_copies): Don't write anything into
constant pool decls.
* gcc.c-torture/execute/pr70602.c: New test.
Added:
trunk/gcc/testsuite/gcc.c-torture/execute/pr70602.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-sra.c
>From gcc-bugs-return-521897-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 09:18:11 2016
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Subject: [Bug middle-end/70626] bogus results in 'acc parallel loop' reductions
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>From gcc-bugs-return-521898-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 09:32:19 2016
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Subject: [Bug libstdc++/59075] python pretty printer does not work at OS X
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--- Comment #7 from manuelrciosici at gmail dot com ---
I can confirm having the same issue on OS X 10.11.4 with GDB 7.8 (from CLion)
and with GDB 7.11 (compiled from Homebrew). I am using GCC 5.3.0 also compiled
from Homebrew. Alexander's code suggestion fixed the problem for me.
When I call 'ptype' on a vector of unsigned long I get the following:
type = class vector<unsigned long, std::allocator<unsigned long> > [with _Tp =
unsigned long, _Alloc = allocator<unsigned long>]
: protected _Vector_base<_Tp, std::_Alloc>
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Subject: [Bug tree-optimization/70577] [6 regression] tree-ssa/prefetch-5.c scan-tree-dump-times aprefetch failures
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--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Kirill Yukhin from comment #8)
> This commit caused miscompare of spec2000/178.galgel on
> -march=skylake-avx512 (-Ofast -flto -funroll-loops):
> Newton iteration # 0 Maximal derivative = 0.1526E-07
> Newton iteration # 0 Maximal derivative = 0.3901E-07
Please file a separate bugreport for this.
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Subject: [Bug testsuite/70577] [6 regression] tree-ssa/prefetch-5.c scan-tree-dump-times aprefetch failures
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
Thus a matter of adjusting the testcase. Basically the comments in it are all
"wrong", in all cases the array is a trailing one.
>From gcc-bugs-return-521901-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 09:41:12 2016
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Subject: [Bug target/70574] [5 Regression] wrong code with -mavx2, read of partially initialised stack variable
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Subject: [Bug c++/70572] [4.9/5/6 Regression] ICE on code with decltype (auto) on x86_64-linux-gnu in digest_init_r, at cp/typeck2.c:1103 with -std=c++14
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Subject: [Bug c++/70571] [6 Regression] ICE on valid code on x86_64-linux-gnu in verify_ctor_sanity, at cp/constexpr.c:2259
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Subject: [Bug c++/70570] Assembler error "symbol already defined" from nested lambdas and function-static variable
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-12
Version|unknown |5.3.0
Ever confirmed|0 |1
Known to fail| |5.3.0, 6.0
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. GCC 4.9 complains:
> g++-4.9 t.C -std=c++14
t.C: In instantiation of ‘main()::<lambda(auto:1)> [with auto:1 = int]’:
t.C:2:8: required from ‘void foo(T) [with T = main()::<lambda(auto:1)>]’
t.C:12:3: required from here
t.C:8:2: error: ‘x’ was not declared in this scope
x;
^
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Subject: [Bug c++/70635] [4.9/5/6 Regression] ICE on (and rejects) valid code on x86_64-linux-gnu: Segmentation fault (program cc1plus)
Date: Tue, 12 Apr 2016 09:48:00 -0000
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--- Comment #2 from Paolo Carlini <paolo.carlini at oracle dot com> ---
It's an infinite recursion affecting the same_type_p call at parser.c:25125
which I added in that patch.
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Subject: [Bug go/70597] [6 Regression] cmd/go: deduplicate gccgo afiles by package path, not *Package
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Subject: [Bug rtl-optimization/70596] [6 Regression] -fcompare-debug failure with one extra NOTE_INSN_DELETED
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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Subject: [Bug c++/70594] [6 Regression] -fcompare-debug failure
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--- Comment #22 from Richard Biener <rguenth at gcc dot gnu.org> ---
The make_fancy_decl_name change is desirable but decls made by SRA should be
DECL_IGNORED and thus not end up anywhere in debug info.
Allocating or not allocating DECL_UIDs based on GC is a recipie for desaster.
We definiely do _not_ want that.
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Subject: [Bug tree-optimization/68756] [6 Regression] ICE w/ -O1 -floop-nest-optimize and isl 0.15: isl-0.15/isl_id.c:213: unable to find id
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--- Comment #10 from vries at gcc dot gnu.org ---
Author: vries
Date: Tue Apr 12 10:08:48 2016
New Revision: 234896
URL: https://gcc.gnu.org/viewcvs?rev=234896&root=gcc&view=rev
Log:
Fix typo in copy_cond_phi_args
2016-04-12 Tom de Vries <tom@codesourcery.com>
PR tree-optimization/68756
* graphite-isl-ast-to-gimple.c (copy_cond_phi_args): Use new_expr
instead of new_name.
* gcc.dg/graphite/pr68756.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/graphite/pr68756.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/graphite-isl-ast-to-gimple.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug ipa/70583] [6 Regression] FAIL: g++.old-deja/g++.abi/vtable2.C -std=gnu++98 execution test
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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Subject: [Bug tree-optimization/68756] [6 Regression] ICE w/ -O1 -floop-nest-optimize and isl 0.15: isl-0.15/isl_id.c:213: unable to find id
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vries at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
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Assignee|spop at gcc dot gnu.org |vries at gcc dot gnu.org
--- Comment #11 from vries at gcc dot gnu.org ---
patch with testcase committed, marking resolved fixed.
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Subject: [Bug tree-optimization/69728] [6 Regression] internal compiler error: in outer_projection_mupa, at graphite-sese-to-poly.c:1175
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--- Comment #2 from vries at gcc dot gnu.org ---
For two more testcases: PR68756 comment 3
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Subject: [Bug c++/70635] [4.9/5/6 Regression] ICE on (and rejects) valid code on x86_64-linux-gnu: Segmentation fault (program cc1plus)
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Subject: [Bug c++/70634] [4.9/5/6 Regression] ICE on valid code on x86_64-linux-gnu: Segmentation fault (program cc1plus)
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Subject: [Bug target/70630] [6 regression] sparc bootstrap failure: sparc.c:4919:6: error: suggest explicit braces to avoid ambiguous 'else'
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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Subject: [Bug target/70633] [5/6 Regression] ICE on valid code at -Os (in 32-bit mode) on x86_64-linux-gnu: output_operand: invalid expression as operand
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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> ---
Mine then.
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70594] [6 Regression] -fcompare-debug failure
Date: Tue, 12 Apr 2016 10:13:00 -0000
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--- Comment #23 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
2016-04-12 Jakub Jelinek <jakub@redhat.com>
PR c++/70594
* tree-sra.c (make_fancy_decl_name): Don't add DECL_UID
into the fancy names if -fdump-final-insns=.
--- gcc/tree-sra.c.jj 2016-04-12 11:08:10.000000000 +0200
+++ gcc/tree-sra.c 2016-04-12 11:15:35.519676357 +0200
@@ -1543,6 +1543,9 @@ make_fancy_decl_name (tree decl)
if (name)
obstack_grow (&name_obstack, IDENTIFIER_POINTER (name),
IDENTIFIER_LENGTH (name));
+ /* Avoid -fcompare-debug issues on DECL_UID differences. */
+ else if (flag_dump_final_insns != NULL)
+ obstack_grow (&name_obstack, "Dxxxx", 5);
else
{
sprintf (buffer, "D%u", DECL_UID (decl));
is something we should do in any case, because the DECL_IGNORED names can make
it into the -fdump-final-insns= dump and the TDF_NOUID in that case can't help
with that.
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Subject: [Bug c++/70627] [6 Regression] internal compiler error: verify_type failed
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Subject: [Bug tree-optimization/68953] [6 Regression] [graphite] Wrong code w/ -O[12] -floop-nest-optimize
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vries at gcc dot gnu.org changed:
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--- Comment #11 from vries at gcc dot gnu.org ---
patch with test-case committed, follow-up question answered (
https://gcc.gnu.org/ml/gcc-patches/2016-04/msg00473.html ). Marking
resolved-fixed.
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Subject: [Bug debug/70628] [5/6 regression] ICE in get_reg_rtx, at emit-rtl.c:1025
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Subject: [Bug rtl-optimization/70625] [4.9/5 Regression] Memory exhaustion when building specific snippet at -O2
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Subject: [Bug sanitizer/70624] [6 Regression] Several hundred asan failures with 6.0 on x86_64-apple-darwin10.8
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>From gcc-bugs-return-521923-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 10:18:54 2016
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Subject: [Bug tree-optimization/70623] [6 Regression] ICE in compute_antic at -O2
Date: Tue, 12 Apr 2016 10:18:00 -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> ---
Mine.
>From gcc-bugs-return-521924-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 10:21:09 2016
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Subject: [Bug c++/70617] internal compiler error: Segmentation fault
Date: Tue, 12 Apr 2016 10:21:00 -0000
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--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
But it ICEs differently, so the reduction is bogus:
> ./cc1plus -quiet t.c -m32 -w
t.c:2:23: error: field ‘TYPES’ has incomplete type ‘UINT’
typedef struct { UINT TYPES } eType;
^
t.c:1:8: note: forward declaration of ‘struct UINT’
struct UINT;
^
t.c:2:23: error: expected ‘;’ at end of member declaration
typedef struct { UINT TYPES } eType;
^
t.c:3:10: error: ISO C++ forbids declaration of ‘fn1’ with no type
[-fpermissive]
fn1(eType) {
^
t.c: In function ‘int fn1(eType)’:
t.c:3:12: error: expected ‘}’ at end of input
fn1(eType) {
^
t.c:3:1: internal compiler error: Segmentation fault
fn1(eType) {
^
0xfa527c crash_signal
/space/rguenther/src/svn/gcc-5-branch/gcc/toplev.c:383
0x7056f3 tree_int_cst_elt_check(tree_node*, int, char const*, int, char const*)
/space/rguenther/src/svn/gcc-5-branch/gcc/tree.h:3050
0x1082419 chkp_find_bound_slots_1(tree_node const*, bitmap_head*, long)
/space/rguenther/src/svn/gcc-5-branch/gcc/tree-chkp.c:1699
0x1082708 chkp_find_bound_slots(tree_node const*, bitmap_head*)
/space/rguenther/src/svn/gcc-5-branch/gcc/tree-chkp.c:1730
0x107fe9a chkp_type_bounds_count(tree_node const*)
>From gcc-bugs-return-521925-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 10:21:31 2016
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Subject: [Bug c++/70616] [4.9/5/6 Regression] ICE on valid code on x86_64-linux-gnu in build_base_path, at cp/class.c:303
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>From gcc-bugs-return-521926-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 10:22:05 2016
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Subject: [Bug c++/70615] [6 Regression] ICE on valid code at -O1 and above on x86_64-linux-gnu in add_expr, at tree.c:7870
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>From gcc-bugs-return-521927-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 10:27:41 2016
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Subject: [Bug tree-optimization/70614] [4.9/5/6 Regression] GCC gets stuck with -O
Date: Tue, 12 Apr 2016 10:27:00 -0000
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
And I already removed the quadraticness there! In an original version of the
patch I only looked at BIVs but that regressed sth. See PR67783.
>From gcc-bugs-return-521928-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 10:40:36 2016
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Subject: [Bug tree-optimization/70600] Missed tree optimization with multiple additions in different types.
Date: Tue, 12 Apr 2016 10:40:00 -0000
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CC| |rguenth at gcc dot gnu.org
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
I believe this should be fixed in reassoc which needs to be teached to
handle mixed sign and mixed precision chains.
>From gcc-bugs-return-521929-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 10:41:17 2016
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Subject: [Bug tree-optimization/70602] [6 Regression] wrong code at -O1 and above on x86_64-linux-gnu in 32-bit mode (and at -Os only in 64-bit mode)
Date: Tue, 12 Apr 2016 10:41:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|NEW |RESOLVED
Component|rtl-optimization |tree-optimization
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--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-521930-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 10:46:34 2016
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Subject: [Bug debug/70628] [5/6 regression] ICE in get_reg_rtx, at emit-rtl.c:1025
Date: Tue, 12 Apr 2016 10:46:00 -0000
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--- Comment #6 from ktkachov at gcc dot gnu.org ---
The ICE in cselib occurs when it calls gen_reg_rtx after reload, which is not
allowed.
This is through a call to simplify_unary_operation_1 on
(zero_extend:DI (high:SI (symbol_ref/f:SI ("*.LC3") [flags 0x82] <var_decl
0x7ffff74eee10 *.LC3>)))
and more specifically a call to convert_memory_address here:
1594 #if defined(POINTERS_EXTEND_UNSIGNED)
1595 /* As we do not know which address space the pointer is referring
to,
1596 we can do this only if the target does not support different
pointer
1597 or address modes depending on the address space. */
1598 if (target_default_pointer_address_modes_p ()
1599 && POINTERS_EXTEND_UNSIGNED > 0
1600 && mode == Pmode && GET_MODE (op) == ptr_mode
1601 && (CONSTANT_P (op)
1602 || (GET_CODE (op) == SUBREG
1603 && REG_P (SUBREG_REG (op))
1604 && REG_POINTER (SUBREG_REG (op))
1605 && GET_MODE (SUBREG_REG (op)) == Pmode))
1606 && !targetm.have_ptr_extend ())
1607 return convert_memory_address (Pmode, op);
1608 #endif
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Subject: [Bug c++/70635] [4.9/5/6 Regression] ICE on (and rejects) valid code on x86_64-linux-gnu: Segmentation fault (program cc1plus)
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--- Comment #3 from Paolo Carlini <paolo.carlini at oracle dot com> ---
I think we can simply restrict the same_type_p call to type_decls with
TREE_TYPE with CLASS_TYPE_P true or something very close. I'm testing a patch.
>From gcc-bugs-return-521932-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 10:56:02 2016
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Subject: [Bug c++/70635] [4.9/5/6 Regression] ICE on (and rejects) valid code on x86_64-linux-gnu: Segmentation fault (program cc1plus)
Date: Tue, 12 Apr 2016 10:56:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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----------------------------------------------------------------------------
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Subject: [Bug tree-optimization/70604] switch statement optimization creates dead code
Date: Tue, 12 Apr 2016 10:58:00 -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> ---
For GCC 6 stronger value-numbering might have fixed most cases.
Are the cases you still see indirect jumps to only one active case or
is it just that if()s with multiple cases would have avoided the dead
code?
I can see
<bb 11>:
_139 = &MEM[(void *)cmd_84(D) + 930B];
_141 = conn_140(D)->sess;
_142 = _141->se_sess;
_143 = &cmd_84(D)->se_cmd;
transport_init_se_cmd (_143, &iscsi_ops, _142, 0, 3, 32, _139);
target_get_sess_cmd (_143, 1);
switch (_58) <default: <L81>, case 1: <L205>, case 2: <L204>, case 3: <L240>,
case 4: <L77>, case 5: <L78>, case 6: <L79>, case 7: <L80>>
<L240>:
goto <bb 19> (<L204>);
<L77>:
goto <bb 19> (<L204>);
<L78>:
goto <bb 19> (<L204>);
<L79>:
goto <bb 19> (<L204>);
<L80>:
goto <bb 19> (<L204>);
<L81>:
_146 = (int) _58;
printk ("\13Unknown iSCSI TMR Function: 0x%02x\n", _146);
_351 = iscsit_add_reject_from_cmd (cmd_84(D), 10, 1, buf_55(D)); [tail call]
goto <bb 54>;
<L205>:
# prephitmp_14 = PHI <1(18), 2(11), 3(12), 4(13), 5(14), 6(15), 7(16)>
<L204>:
with the default case looping back. switch conversion should probably handle
this but is run too early. OTOH it seems to be confused by the default
case not falling thru, failing to see the "simple" transform to a
if (... >= 1 && ... <= 7)
;
else
old default;
beginning to process the following SWITCH statement
(drivers/target/iscsi/iscsi_target.c:1807) : -------
switch (_74) <default: <L81>, case 1: <L204>, case 2: <L75>, case 3: <L76>,
case 4: <L77>, case 5: <L78>, case 6: <L79>, case 7: <L80>>
Bailing out - no common successor to all case label target blocks found
--------------------------------
beginning to process the following SWITCH statement
(drivers/target/iscsi/iscsi_target.c:1866) : -------
switch (_74) <default: <L127>, case 1: <L105>, case 2 ... 5: <L201>, case 6:
<L114>, case 7: <L117>, case 8: <L120>>
Bailing out - no common successor to all case label target blocks found
--------------------------------
Not sure what the other cases are.
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Subject: [Bug target/70566] [4.9/5 Regression] Bad ARM code generated for evaluating unsigned int bitfield value
Date: Tue, 12 Apr 2016 10:59:00 -0000
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--- Comment #12 from ktkachov at gcc dot gnu.org ---
Author: ktkachov
Date: Tue Apr 12 10:58:28 2016
New Revision: 234898
URL: https://gcc.gnu.org/viewcvs?rev=234898&root=gcc&view=rev
Log:
[ARM] PR target/70566 Check that condition register is dead in tst-imm ->
lsls-imm Thumb2 peepholes
Backport from mainline
2016-04-08 Kyrylo Tkachov <kyrylo.tkachov@arm.com>
PR target/70566
* config/arm/thumb2.md (tst + branch-> lsls + branch
peephole below *orsi_not_shiftsi_si): Require that condition
register is dead after the peephole.
(second peephole after the above): Likewise.
* gcc.c-torture/execute/pr70566.c: New test.
Added:
branches/gcc-5-branch/gcc/testsuite/gcc.c-torture/execute/pr70566.c
Modified:
branches/gcc-5-branch/gcc/ChangeLog
branches/gcc-5-branch/gcc/config/arm/thumb2.md
branches/gcc-5-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-521936-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 11:17:50 2016
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Subject: [Bug fortran/69497] ICE in gfc_free_namespace, at fortran/symbol.c:3701
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--- Comment #5 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
The patch in comment 3 also fixes the first test in pr69498 comment 0, but not
the tests containing submodule which gives the following ICE
pr69498_1.f90:3:19:
submodule (m) sm
1
Error: Unexpected SUBMODULE statement at (1)
f951: internal compiler error: in resolve_assoc_var, at fortran/resolve.c:8099
>From gcc-bugs-return-521935-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 11:17:37 2016
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Subject: [Bug tree-optimization/70623] [6 Regression] ICE in compute_antic at -O2
Date: Tue, 12 Apr 2016 11:17:00 -0000
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Value numbers:
_1 = _31
_4 = 1
and
<bb 7>:
_4 = rc_35 != 0;
_31 = _9 == 0;
_1 = _4 & _31;
if (_1 != 0)
which is in the loop we don't converge for ANTIC compute:
...
Starting iteration 497
ANTIC_OUT[10] := { _9 (0006) }
ANTIC_IN[10] := { _9 (0006), rc_35 (0017), {plus_expr,rc_35,1} (0008) }
S[10] := { _9 (0006) }
ANTIC_OUT[18] := { _9 (0006), rc_13 (0008) }
ANTIC_IN[18] := { _9 (0006), rc_13 (0008) }
S[18] := { _9 (0006), rc_13 (0008) }
Starting iteration 498
ANTIC_OUT[10] := { }
ANTIC_IN[10] := { rc_35 (0017), {plus_expr,rc_35,1} (0008) }
S[10] := { }
ANTIC_OUT[18] := { rc_13 (0008) }
ANTIC_IN[18] := { rc_13 (0008) }
S[18] := { rc_13 (0008) }
Starting iteration 498
ANTIC_OUT[10] := { }
ANTIC_IN[10] := { rc_35 (0017), {plus_expr,rc_35,1} (0008) }
S[10] := { }
ANTIC_OUT[18] := { _9 (0006), rc_13 (0008) }
ANTIC_IN[18] := { _9 (0006), rc_13 (0008) }
S[18] := { _9 (0006), rc_13 (0008) }
...
Starting iteration 499
ANTIC_OUT[10] := { _9 (0006) }
ANTIC_IN[10] := { _9 (0006), rc_35 (0017), {plus_expr,rc_35,1} (0008) }
S[10] := { _9 (0006) }
ANTIC_OUT[18] := { rc_13 (0008) }
ANTIC_IN[18] := { rc_13 (0008) }
S[18] := { rc_13 (0008) }
I think we're just unlucky here to run into a latent issue (IIRC a similar
testcase ICEs on the gcc-5 branch instead).
Investigating more closely.
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Subject: [Bug debug/70628] [5/6 regression] ICE in get_reg_rtx, at emit-rtl.c:1025
Date: Tue, 12 Apr 2016 11:33:00 -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 #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 38242
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38242&action=edit
gcc6-pr70628.patch
IMNSHO simplify-rtx.c should never generate instructions, it carefully uses
gen_lowpart_no_emit hook instead of gen_lowpart etc., but the
convert_memory_addr seems to be the only cases which violate this.
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Subject: [Bug testsuite/68242] [gomp4] FAIL: libgomp.oacc-c-c++-common/reduction-2.c -DACC_DEVICE_TYPE_host=1 execution test
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Thomas Schwinge <tschwinge at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Component|libgomp |testsuite
Assignee|nathan at gcc dot gnu.org |cesar at gcc dot gnu.org
Target Milestone|--- |7.0
--- Comment #5 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
(In reply to vries from comment #0)
> I observe when testing gomp4_0-branch on x86_64 with -m32:
> ...
> FAIL: libgomp.oacc-c/../libgomp.oacc-c-c++-common/reduction-2.c
> -DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1 -foffload=disable execution test
> ...
(In reply to Thomas Schwinge from comment #2)
> Yes, I had reported that to Cesar in
> <http://news.gmane.org/find-root.php?message_id=%3C87io7726h5.fsf%40kepler.
> schwinge.homeip.net%3E>, but it has not yet been fixed. (Same for the other
> items that I reported in this email.)
Now seen on trunk.
>From gcc-bugs-return-521939-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 11:49:14 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/70596] [6 Regression] -fcompare-debug failure with one extra NOTE_INSN_DELETED
Date: Tue, 12 Apr 2016 11:49:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
This one is impossible to bisect, as the testcase ICEs starting with
r226901 and r232445 fixed this, but the -fcompare-debug issue is already there.
r226900 has been the last version that didn't ICE and didn't result in compare
debug failure.
That said, it is clearly the bug in r232445, we should never delete debug
insns, just reset them instead. Let me try a fix.
>From gcc-bugs-return-521940-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 12:07:53 2016
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Subject: [Bug c++/70594] [6 Regression] -fcompare-debug failure
Date: Tue, 12 Apr 2016 12:07:00 -0000
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--- Comment #24 from Tobias Burnus <burnus at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #18)
> For the testcases in this PR probably: [...[
> [...] would be enough [...] But the #c0 report suggests this affects
> more than that, but only Tobias has the reproducer that.
I applied that patch - and can confirm that it fixes the LLVM issue (comment
4), but not the original issue (comment 0).
Regarding comment 3, using -fdump-final-insns= without vs. with --param
ggc-min-expand=0 --param ggc-min-heapsize=0 gives indeed a different result for
comment 0's test case; however, that flag makes GCC extremely slow; the compile
time goes up from 11s to 15min - which is also not the best for delta.pl
reduction.
The changes are in items such as 'net_stream.160_55->D.114439._vptr.' where
D.114439 changes to D.114447 and the decl_uid in the ";; Function" lines
changes.
(In reply to Jakub Jelinek from comment #20)
> Tobias, could you try your to reproduce your #c0 issue, with a debugging
> patch like:
[...]
I will try this now.
>From gcc-bugs-return-521941-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 12:17:35 2016
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Subject: [Bug libstdc++/59075] python pretty printer does not work at OS X
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Odd, on GNU/Linux I get:
type = class std::vector<unsigned long, std::allocator<unsigned long> > :
protected std::_Vector_base<unsigned long, std::allocator<unsigned long> > {
i.e. it has std:: qualification, and doesn't have the [with _Tp = ...] stuff
which G++ outputs in diagnostics, but doesn't belong in the debug info if I
understand correctly.
Iain, I don't know how to read the DWARF in the attachments, do you? And do you
know anything about why the DWARF info is different in this way?
>From gcc-bugs-return-521942-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 12:20:31 2016
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Subject: [Bug rtl-optimization/70596] [6 Regression] -fcompare-debug failure with one extra NOTE_INSN_DELETED
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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> ---
Created attachment 38243
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38243&action=edit
gcc6-pr70596.patch
Untested fix.
>From gcc-bugs-return-521943-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 12:51:00 2016
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Subject: [Bug rtl-optimization/70030] [LRA]ICE when reload insn with output scratch operand
Date: Tue, 12 Apr 2016 12:51:00 -0000
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--- Comment #7 from Renlin Li <renlin at gcc dot gnu.org> ---
(In reply to Vladimir Makarov from comment #6)
> Created attachment 38033 [details]
> A patch
>
> Here is the patch which might solve the problem.
Hi Vladimir, sorry for the late reply. I am just back from holiday.
Thanks for the patch. I have tested that it fixes the ICE reported here!
scratch register in reload instructions are replaced by pseudo registers just
as other instructions feeding into LRA.
I have also did regression test and bootstrap check. It's all good for
aarch64-none-linux-gnu toolchain.
Are you going to post it?
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Subject: [Bug c++/70627] [6 Regression] internal compiler error: verify_type failed
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Jan Hubicka <hubicka at gcc dot gnu.org> changed:
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--- Comment #6 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
The variant is created by:
#0 copy_node_stat (node=0x7ffff6b7ab28) at ../../gcc/tree.c:1148
#1 0x0000000001364e93 in build_distinct_type_copy (type=0x7ffff6b7ab28) at
../../gcc/tree.c:6701
#2 0x000000000136506f in build_variant_type_copy (type=0x7ffff6b7ab28) at
../../gcc/tree.c:6741
#3 0x0000000001364b1a in build_qualified_type (type=0x7ffff6b7ab28,
type_quals=1) at ../../gcc/tree.c:6637
#4 0x0000000000973077 in cp_build_qualified_type_real (type=0x7ffff6b7ab28,
type_quals=1, complain=3) at ../../gcc/cp/tree.c:1151
#5 0x00000000008f208d in build_class_member_access_expr (object=...,
member=0x7ffff6b63da8, access_path=0x0, preserve_reference=false, complain=3)
at ../../gcc/cp/typeck.c:2448
#6 0x0000000000949f92 in finish_non_static_data_member (decl=0x7ffff6b63da8,
object=0x7ffff6b76cc0, qualifying_scope=0x0) at ../../gcc/cp/semantics.c:1821
#7 0x0000000000950f6c in finish_id_expression (id_expression=0x7ffff6b78000,
decl=0x7ffff6b63da8, scope=0x0, idk=0x7fffffffce9c,
integral_constant_expression_p=false,
allow_non_integral_constant_expression_p=false,
non_integral_constant_expression_p=0x7ffff7ff5add, template_p=false,
done=true, address_p=false, template_arg_p=false, error_msg=0x7fffffffcc18,
location=304544) at ../../gcc/cp/semantics.c:3717
#8 0x000000000088cdb8 in cp_parser_primary_expression (parser=0x7ffff7ff5ab0,
address_p=false, cast_p=false, template_arg_p=false, decltype_p=false,
idk=0x7fffffffce9c) at ../../gcc/cp/parser.c:5285
#9 0x0000000000890370 in cp_parser_postfix_expression (parser=0x7ffff7ff5ab0,
address_p=false, cast_p=false, member_access_only_p=false, decltype_p=false,
pidk_return=0x0) at ../../gcc/cp/parser.c:6690
#10 0x00000000008936ae in cp_parser_unary_expression (parser=0x7ffff7ff5ab0,
pidk=0x0, address_p=false, cast_p=false, decltype_p=false) at
../../gcc/cp/parser.c:7988
#11 0x000000000089448f in cp_parser_cast_expression (parser=0x7ffff7ff5ab0,
address_p=false, cast_p=false, decltype_p=false, pidk=0x0) at
../../gcc/cp/parser.c:8665
#12 0x000000000089457d in cp_parser_binary_expression (parser=0x7ffff7ff5ab0,
cast_p=false, no_toplevel_fold_p=false, decltype_p=false,
prec=PREC_NOT_OPERATOR, pidk=0x0) at ../../gcc/cp/parser.c:8767
#13 0x0000000000895287 in cp_parser_assignment_expression
(parser=0x7ffff7ff5ab0, pidk=0x0, cast_p=false, decltype_p=false) at
../../gcc/cp/parser.c:9055
#14 0x000000000089245d in cp_parser_parenthesized_expression_list
(parser=0x7ffff7ff5ab0, is_attribute_list=0, cast_p=false,
allow_expansion_p=true, non_constant_p=0x0, close_paren_loc=0x7fffffffd8dc)
at ../../gcc/cp/parser.c:7459
and later we change TREE_TYPE of the main variant in:
0x000000000078a3ce in start_enum (name=0x7ffff6b77f20, enumtype=0x7ffff6b7ab28,
underlying_type=0x7ffff6b7a930, attributes=0x0, scoped_enum_p=true,
is_new=0x7fffffffe637) at ../../gcc/cp/decl.c:13231
13231 ENUM_UNDERLYING_TYPE (enumtype) = underlying_type;
(gdb) bt
#0 0x000000000078a3ce in start_enum (name=0x7ffff6b77f20,
enumtype=0x7ffff6b7ab28, underlying_type=0x7ffff6b7a930, attributes=0x0,
scoped_enum_p=true, is_new=0x7fffffffe637) at ../../gcc/cp/decl.c:13231
#1 0x00000000008a36d4 in cp_parser_enum_specifier (parser=0x7ffff7ff5ab0) at
../../gcc/cp/parser.c:17183
#2 0x00000000008a1266 in cp_parser_type_specifier (parser=0x7ffff7ff5ab0,
flags=1, decl_specs=0x7fffffffe7f0, is_declaration=true,
declares_class_or_enum=0x7fffffffe784, is_cv_qualifier=0x7fffffffe783)
at ../../gcc/cp/parser.c:15806
#3 0x000000000089c342 in cp_parser_decl_specifier_seq (parser=0x7ffff7ff5ab0,
flags=1, decl_specs=0x7fffffffe7f0, declares_class_or_enum=0x7fffffffe894) at
../../gcc/cp/parser.c:12758
#4 0x000000000089b90d in cp_parser_simple_declaration (parser=0x7ffff7ff5ab0,
function_definition_allowed_p=true, maybe_range_for_decl=0x0) at
../../gcc/cp/parser.c:12301
#5 0x000000000089b899 in cp_parser_block_declaration (parser=0x7ffff7ff5ab0,
statement_p=false) at ../../gcc/cp/parser.c:12248
#6 0x000000000089b61c in cp_parser_declaration (parser=0x7ffff7ff5ab0) at
../../gcc/cp/parser.c:12145
#7 0x000000000089b16e in cp_parser_declaration_seq_opt (parser=0x7ffff7ff5ab0)
at ../../gcc/cp/parser.c:12024
#8 0x000000000088b25e in cp_parser_translation_unit (parser=0x7ffff7ff5ab0) at
../../gcc/cp/parser.c:4323
Jason, perhaps start_enum wants to walk variants and update them after
finalizing underlying type?
I am also fine with disabling the check and deferring for next stage1.
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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/70623] [6 Regression] ICE in compute_antic at -O2
Date: Tue, 12 Apr 2016 13:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70623
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
This seems to be a bug in iteration order.
>From gcc-bugs-return-521946-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 13:19:42 2016
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From: "steveire at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70636] New: Link failure when C++ brace initialization is used
Date: Tue, 12 Apr 2016 13:19:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70636
Bug ID: 70636
Summary: Link failure when C++ brace initialization is used
Product: gcc
Version: 5.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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$ g++ --version
g++ (Ubuntu 5.2.1-22ubuntu2) 5.2.1 20151010
Copyright (C) 2015 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
$ cat brace-init.cpp
#include <vector>
#include <string>
class Expression
{
public:
std::vector<int> args;
};
Expression getExpr(const Expression& def = {})
{
return def;
}
int main()
{
auto a = getExpr();
// auto a = getExpr({});
}
$ g++ brace-init.cpp -std=c++11 -v
Using built-in specs.
COLLECT_GCC=/usr/bin/g++
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/5/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu 5.2.1-22ubuntu2'
--with-bugurl=file:///usr/share/doc/gcc-5/README.Bugs
--enable-languages=c,ada,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-5 --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --with-system-zlib
--disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo
--with-java-home=/usr/lib/jvm/java-1.5.0-gcj-5-amd64/jre --enable-java-home
--with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-5-amd64
--with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-5-amd64
--with-arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar
--enable-objc-gc --enable-multiarch --disable-werror --with-arch-32=i686
--with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib
--with-tune=generic --enable-checking=release --build=x86_64-linux-gnu
--host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 5.2.1 20151010 (Ubuntu 5.2.1-22ubuntu2)
COLLECT_GCC_OPTIONS='-std=c++11' '-v' '-shared-libgcc' '-mtune=generic'
'-march=x86-64'
/usr/lib/gcc/x86_64-linux-gnu/5/cc1plus -quiet -v -imultiarch x86_64-linux-gnu
-D_GNU_SOURCE brace-init.cpp -quiet -dumpbase brace-init.cpp -mtune=generic
-march=x86-64 -auxbase brace-init -std=c++11 -version -fstack-protector-strong
-Wformat -Wformat-security -o /tmp/ccsM0fgs.s
GNU C++11 (Ubuntu 5.2.1-22ubuntu2) version 5.2.1 20151010 (x86_64-linux-gnu)
compiled by GNU C version 5.2.1 20151010, GMP version 6.0.0, MPFR
version 3.1.3, MPC version 1.0.3
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
ignoring duplicate directory "/usr/include/x86_64-linux-gnu/c++/5"
ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu"
ignoring nonexistent directory
"/usr/lib/gcc/x86_64-linux-gnu/5/../../../../x86_64-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
/usr/include/c++/5
/usr/include/x86_64-linux-gnu/c++/5
/usr/include/c++/5/backward
/usr/lib/gcc/x86_64-linux-gnu/5/include
/usr/local/include
/usr/lib/gcc/x86_64-linux-gnu/5/include-fixed
/usr/include/x86_64-linux-gnu
/usr/include
End of search list.
GNU C++11 (Ubuntu 5.2.1-22ubuntu2) version 5.2.1 20151010 (x86_64-linux-gnu)
compiled by GNU C version 5.2.1 20151010, GMP version 6.0.0, MPFR
version 3.1.3, MPC version 1.0.3
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 5ed623d6fe11f4bcc1afee70f77e33b0
COLLECT_GCC_OPTIONS='-std=c++11' '-v' '-shared-libgcc' '-mtune=generic'
'-march=x86-64'
as -v --64 -o /tmp/cc7GSdPa.o /tmp/ccsM0fgs.s
GNU assembler version 2.25.1 (x86_64-linux-gnu) using BFD version (GNU Binutils
for Ubuntu) 2.25.1
COMPILER_PATH=/usr/lib/gcc/x86_64-linux-gnu/5/:/usr/lib/gcc/x86_64-linux-gnu/5/:/usr/lib/gcc/x86_64-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/5/:/usr/lib/gcc/x86_64-linux-gnu/
LIBRARY_PATH=/usr/lib/gcc/x86_64-linux-gnu/5/:/usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/5/../../../../lib/:/lib/x86_64-linux-gnu/:/lib/../lib/:/usr/lib/x86_64-linux-gnu/:/usr/lib/../lib/:/usr/lib/gcc/x86_64-linux-gnu/5/../../../:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-std=c++11' '-v' '-shared-libgcc' '-mtune=generic'
'-march=x86-64'
/usr/lib/gcc/x86_64-linux-gnu/5/collect2 -plugin
/usr/lib/gcc/x86_64-linux-gnu/5/liblto_plugin.so
-plugin-opt=/usr/lib/gcc/x86_64-linux-gnu/5/lto-wrapper
-plugin-opt=-fresolution=/tmp/ccq481oT.res -plugin-opt=-pass-through=-lgcc_s
-plugin-opt=-pass-through=-lgcc -plugin-opt=-pass-through=-lc
-plugin-opt=-pass-through=-lgcc_s -plugin-opt=-pass-through=-lgcc --sysroot=/
--build-id --eh-frame-hdr -m elf_x86_64 --hash-style=gnu --as-needed
-dynamic-linker /lib64/ld-linux-x86-64.so.2 -z relro
/usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu/crt1.o
/usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu/crti.o
/usr/lib/gcc/x86_64-linux-gnu/5/crtbegin.o -L/usr/lib/gcc/x86_64-linux-gnu/5
-L/usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu
-L/usr/lib/gcc/x86_64-linux-gnu/5/../../../../lib -L/lib/x86_64-linux-gnu
-L/lib/../lib -L/usr/lib/x86_64-linux-gnu -L/usr/lib/../lib
-L/usr/lib/gcc/x86_64-linux-gnu/5/../../.. /tmp/cc7GSdPa.o -lstdc++ -lm -lgcc_s
-lgcc -lc -lgcc_s -lgcc /usr/lib/gcc/x86_64-linux-gnu/5/crtend.o
/usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu/crtn.o
/tmp/cc7GSdPa.o: In function `main':
brace-init.cpp:(.text+0x49): undefined reference to `std::vector<int,
std::allocator<int> >::vector()'
collect2: error: ld returned 1 exit status
>From gcc-bugs-return-521947-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 13:29:17 2016
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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++/70615] [6 Regression] ICE on valid code at -O1 and above on x86_64-linux-gnu in add_expr, at tree.c:7870
Date: Tue, 12 Apr 2016 13:29:00 -0000
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
cp_gimplify_expr has code to handle the PTRMEM_CST case, but that is
unfortunately too late, if it appears in a CONSTRUCTOR, the gimplifier can try
to hash the CONSTRUCTOR which obviously can't handle the FE specific trees.
So, shall the FE somewhere early remove the PTRMEM_CSTs, or shall
cp_genericize_r remove them (well, replace with cplus_expand_constant result),
or shall cp_gimplify_expr have a case for CONSTRUCTOR where it would walk_tree
the ctor and use cplus_expand_constant in there?
>From gcc-bugs-return-521948-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 13:31:13 2016
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From: "jason at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70029] [6 Regression] ICE with C++11 and -flto
Date: Tue, 12 Apr 2016 13:31:00 -0000
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Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |NEW
Assignee|jason at gcc dot gnu.org |unassigned at gcc dot gnu.org
--- Comment #8 from Jason Merrill <jason at gcc dot gnu.org> ---
(In reply to Jan Hubicka from comment #7)
> Hmm, both options sounds quite involved. Perhaps for stage4 we can simply
> drop the sanity check and add yet another FIXME to the verifier? Alias.c is
> relatively robust about walking to main variants so I can't think of wrong
> code issue caused by this.
Yes, I think better to defer a proper fix until GCC 7.
>From gcc-bugs-return-521949-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 13:37:25 2016
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From: "steveire at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70637] New: Ambiguity error invoking a constructor with double brace initialization
Date: Tue, 12 Apr 2016 13:37:00 -0000
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Bug ID: 70637
Summary: Ambiguity error invoking a constructor with double
brace initialization
Product: gcc
Version: 5.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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Target Milestone: ---
$ g++ --version
g++ (Ubuntu 5.2.1-22ubuntu2) 5.2.1 20151010
Copyright (C) 2015 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
$ g++ double-braces.cpp -std=c++11
double-braces.cpp: In function ‘int main()’:
double-braces.cpp:16:20: error: call of overloaded ‘SomeClass(<brace-enclosed
initializer list>)’ is ambiguous
SomeClass sc({{}});
^
double-braces.cpp:7:12: note: candidate:
SomeClass::SomeClass(std::vector<std::vector<float> >)
explicit SomeClass(std::vector<std::vector<float>> samples)
^
double-braces.cpp:4:7: note: candidate: SomeClass::SomeClass(const SomeClass&)
class SomeClass
^
double-braces.cpp:4:7: note: candidate: SomeClass::SomeClass(SomeClass&&)
$ cat double-braces.cpp
#include <vector>
class SomeClass
{
public:
explicit SomeClass(std::vector<std::vector<float>> samples)
: mSamples(std::move(samples))
{
}
std::vector<std::vector<float>> mSamples;
};
int main()
{
SomeClass sc({{}});
}
>From gcc-bugs-return-521950-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 13:39:31 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug testsuite/70577] [6 regression] tree-ssa/prefetch-5.c scan-tree-dump-times aprefetch failures
Date: Tue, 12 Apr 2016 13:39:00 -0000
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--- Comment #11 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Tue Apr 12 13:38:46 2016
New Revision: 234902
URL: https://gcc.gnu.org/viewcvs?rev=234902&root=gcc&view=rev
Log:
Revert r234572 (aka PR testsuite/70577)
Revert
2016-03-30 Jan Hubicka <hubicka@ucw.cz>
* tree-ssa-loop-niter.c (idx_infer_loop_bounds): We can't get realistic
estimates here.
* tree-ssa-loop-unswitch.c (tree_unswitch_single_loop): Use also
max_loop_iterations_int.
(tree_unswitch_outer_loop): Likewise.
* tree-ssa-loop-ivopts.c (avg_loop_niter): Likewise.
* tree-vect-loop.c (vect_analyze_loop_2): Likewise.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree-ssa-loop-ivopts.c
trunk/gcc/tree-ssa-loop-niter.c
trunk/gcc/tree-ssa-loop-unswitch.c
trunk/gcc/tree-vect-loop.c
>From gcc-bugs-return-521951-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 13:40:00 2016
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Subject: [Bug testsuite/70577] [6 regression] tree-ssa/prefetch-5.c scan-tree-dump-times aprefetch failures
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #12 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-521952-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 13:42:02 2016
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Subject: [Bug sanitizer/70624] [6 Regression] Several hundred asan failures with 6.0 on x86_64-apple-darwin10.8
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
So can dyldVersionNumber be only used for #if SANITIZER_IOSSIM and otherwise
use what it did before?
>From gcc-bugs-return-521953-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 13:56:39 2016
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Subject: [Bug c++/70634] [4.9/5/6 Regression] ICE on valid code on x86_64-linux-gnu: Segmentation fault (program cc1plus)
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70634
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
So, when value_dependent_expression is called on the VAR_DECL i,
it (since the above mentioned change) recurse on its DECL_INITIAL:
if (DECL_INITIAL (expression)
&& decl_constant_var_p (expression)
&& (TREE_CODE (DECL_INITIAL (expression)) == TREE_LIST
/* cp_finish_decl doesn't fold reference initializers. */
|| TREE_CODE (TREE_TYPE (expression)) == REFERENCE_TYPE
|| value_dependent_expression_p (DECL_INITIAL (expression))))
return true;
then when seeing the SIZEOF_EXPR in there we do:
return instantiation_dependent_expression_p (expression);
on the SIZEOF_EXPR's operand (which is VAR_DECL i), and
instantiation_dependent_r for VAR_DECL just calls value_dependent_expression
again, which closes the infinite recursion. So we need to break the recursion
somewhere, perhaps by remembering in which VAR_DECL initializers we are already
in, or by temporarily clearing the DECL_INITIALIZER of the VAR_DECLs we are
recursing into, whatever. Jason, any thoughts on this?
>From gcc-bugs-return-521954-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 14:03:08 2016
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Subject: [Bug testsuite/68242] FAIL: libgomp.oacc-c-c++-common/reduction-2.c, and other OpenACC reduction test case "oddities"
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Yeah, I'm seeing this in i686-linux regtests on the trunk too.
>From gcc-bugs-return-521955-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 14:12:51 2016
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Subject: [Bug middle-end/70638] New: transaction_wrap: too strict compatibility check and transaction_pure wrappers fail to wrap
Date: Tue, 12 Apr 2016 14:12:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70638
Bug ID: 70638
Summary: transaction_wrap: too strict compatibility check and
transaction_pure wrappers fail to wrap
Product: gcc
Version: 6.0
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The attached test case shows two issues with transaction_wrap:
1) If the original function is not transaction_safe, but the wrapper is
declared safe, this incorrectly results in an compilation error about the
original and the wrapper function being incompatible.
I believe this used to work before, but haven't checked.
2) If a wrapper is declared transaction_pure, the original function is
incorrectly considered to be transaction_pure.
The fourth case in the test might be something to be considered adding support
for. OTOH, perhaps it's safer for programmers having to explicitly select
whether a wrapper is pure or safe, given that there seem to be these two
separate use cases (ie, making it pure to customize instrumentation, and making
it safe to use a transaction-friendly wrapper that still needs to be
instrumented).
>From gcc-bugs-return-521956-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 14:14:08 2016
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Subject: [Bug middle-end/70638] transaction_wrap: too strict compatibility check and transaction_pure wrappers fail to wrap
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--- Comment #1 from torvald at gcc dot gnu.org ---
Created attachment 38244
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test case
>From gcc-bugs-return-521957-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 14:29:07 2016
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Subject: [Bug target/70633] [5/6 Regression] ICE on valid code at -Os (in 32-bit mode) on x86_64-linux-gnu: output_operand: invalid expression as operand
Date: Tue, 12 Apr 2016 14:29:00 -0000
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Guess the problem is a disagreement on what is valid constructor initializer.
initializer_constant_valid_p on (int) &main says it is valid constant, but the
gimplifier doesn't keep it around and instead replaces it with a temporary.
So, either the gimplifier shouldn't do that for elements that satisfy
initializer_constant_valid_p, or (perhaps safer) it should clear TREE_STATIC on
the CONSTRUCTOR when it does this.
>From gcc-bugs-return-521958-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 14:42:01 2016
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Subject: [Bug c++/70594] [6 Regression] -fcompare-debug failure
Date: Tue, 12 Apr 2016 14:42:00 -0000
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--- Comment #25 from Jason Merrill <jason at gcc dot gnu.org> ---
Created attachment 38245
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Patch to not discard copies
This seems like a minimal fix; does it in fact fix the bug?
>From gcc-bugs-return-521959-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 14:54:11 2016
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Subject: [Bug debug/70628] [5/6 regression] ICE in get_reg_rtx, at emit-rtl.c:1025
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--- Comment #8 from ktkachov at gcc dot gnu.org ---
(In reply to Jakub Jelinek from comment #7)
> Created attachment 38242 [details]
> gcc6-pr70628.patch
>
> IMNSHO simplify-rtx.c should never generate instructions, it carefully uses
> gen_lowpart_no_emit hook instead of gen_lowpart etc., but the
> convert_memory_addr seems to be the only cases which violate this.
The patch passed bootstrap on aarch64 but fails with a -Werror warning on
armhf:
gcc/explow.c:269:15: error: unused parameter 'no_emit'
[-Werror=unused-parameter]
bool no_emit)
^~~~~~~
This is because arm doesn't define POINTERS_EXTEND_UNSIGNED so the new
parameter no_emit is seen as unused.
>From gcc-bugs-return-521960-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 15:20:07 2016
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Subject: [Bug c++/70594] [6 Regression] -fcompare-debug failure
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--- Comment #26 from Jason Merrill <jason at gcc dot gnu.org> ---
(In reply to Jason Merrill from comment #25)
> Created attachment 38245 [details]
> Patch to not discard copies
>
> This seems like a minimal fix; does it in fact fix the bug?
With this patch gengtype seems to assign gt_ggc_mx(tree&) to cp/constexpr.o,
breaking cc1 link. I'm not going to try to fix that now, though someone else
is welcome to.
>From gcc-bugs-return-521961-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 15:25:09 2016
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Subject: [Bug tree-optimization/70604] switch statement optimization creates dead code
Date: Tue, 12 Apr 2016 15:25:00 -0000
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--- Comment #3 from Josh Poimboeuf <jpoimboe at redhat dot com> ---
Hi Richard, thanks for looking at it!
(In reply to Richard Biener from comment #2)
> Are the cases you still see indirect jumps to only one active case or
> is it just that if()s with multiple cases would have avoided the dead
> code?
I don't quite understand the second part of your question, but maybe this
information will answer it.
With GCC 6 I've only seen one occurrence of this issue, which is the one for
which I posted the assembler and .i file above. It has an indirect jump which
is hard-coded to use only one entry in the jump table, as shown in the
assembler code above.
Note that the C code has two switch statements, which seem to correspond to the
two "normal" cases of indirect jump table patterns. But then there's the third
unusual indirect jump, shown above, which also corresponds to one of the two
switch statements -- so there are two jump tables for a single switch
statement, where one of the tables appears to be optimized for a single case.
Hopefully I'm making sense :-)
With GCC 5, the other occurrences of this issue were very similar, with switch
statements and indirect jumps to a single entry in the jump table.
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Subject: [Bug c++/70594] [6 Regression] -fcompare-debug failure
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--- Comment #27 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
(In reply to Jason Merrill from comment #26)
> With this patch gengtype seems to assign gt_ggc_mx(tree&) to cp/constexpr.o,
> breaking cc1 link. I'm not going to try to fix that now, though someone
> else is welcome to.
Yeah, a similar link failure led me to adding all that gt_ggc_mx stuff in
yesterday's protopatch. However, I think you're on the right minimal track.
When the constexpr_call_table is gc-deleted, the preservation of the
fn_copies_table will guarantee we won't change UID allocation. We'll still
want the post-parseing hook to kill the copies table.
I'll see what I can do with your patch.
>From gcc-bugs-return-521963-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 15:43:50 2016
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Subject: [Bug target/70633] [5/6 Regression] ICE on valid code at -Os (in 32-bit mode) on x86_64-linux-gnu: output_operand: invalid expression as operand
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 38246
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38246&action=edit
gcc6-pr70633.patch
Untested fix. This works for me, but Richard, if you have a different patch
already in testing or if you think this is bad approach, I'll leave it to you.
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Subject: [Bug c++/70501] [6 Regression] internal compiler error: in verify_ctor_sanity, at cp/constexpr.c:2249
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--- Comment #4 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Author: nathan
Date: Tue Apr 12 16:24:11 2016
New Revision: 234904
URL: https://gcc.gnu.org/viewcvs?rev=234904&root=gcc&view=rev
Log:
PR c++/70501
cp/
* constexpr.c (cxx_eval_bare_aggregate): Handle VECTOR_TYPE
similarly to PMF.
testsuite/
* g++.dg/init/pr70501.C: New.
Added:
trunk/gcc/testsuite/g++.dg/init/pr70501.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/constexpr.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/70501] [6 Regression] internal compiler error: in verify_ctor_sanity, at cp/constexpr.c:2249
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Nathan Sidwell <nathan at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Fixed r234904.
>From gcc-bugs-return-521966-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 16:32:21 2016
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Subject: [Bug c++/70639] New: internal compiler error: in guard_tinfo_to_string, at c-family/c-indentation.c:560
Date: Tue, 12 Apr 2016 16:32:00 -0000
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Bug ID: 70639
Summary: internal compiler error: in guard_tinfo_to_string, at
c-family/c-indentation.c:560
Product: gcc
Version: 6.0
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Target Milestone: ---
$ cat e.C
void bar (int);
void
foo (int x)
{
if (x > 0)
switch (x);
bar (x);
}
$ ./cc1plus -quiet e.C -Wall
e.C: In function ‘void foo(int)’:
e.C:7:15: internal compiler error: in guard_tinfo_to_string, at
c-family/c-indentation.c:560
switch (x);
^
0x98d787 guard_tinfo_to_string
/home/marek/src/gcc/gcc/c-family/c-indentation.c:560
0x98db65 warn_for_misleading_indentation(token_indent_info const&,
token_indent_info const&, token_indent_info const&)
/home/marek/src/gcc/gcc/c-family/c-indentation.c:605
0x830373 cp_parser_implicitly_scoped_statement
/home/marek/src/gcc/gcc/cp/parser.c:11928
0x82932c cp_parser_selection_statement
/home/marek/src/gcc/gcc/cp/parser.c:10982
0x82932c cp_parser_statement
/home/marek/src/gcc/gcc/cp/parser.c:10389
0x83033e cp_parser_implicitly_scoped_statement
/home/marek/src/gcc/gcc/cp/parser.c:11921
0x829812 cp_parser_selection_statement
/home/marek/src/gcc/gcc/cp/parser.c:10888
0x829812 cp_parser_statement
/home/marek/src/gcc/gcc/cp/parser.c:10389
0x829e4c cp_parser_statement_seq_opt
/home/marek/src/gcc/gcc/cp/parser.c:10806
0x829f5f cp_parser_compound_statement
/home/marek/src/gcc/gcc/cp/parser.c:10760
0x82a130 cp_parser_function_body
/home/marek/src/gcc/gcc/cp/parser.c:20653
0x82a130 cp_parser_ctor_initializer_opt_and_function_body
/home/marek/src/gcc/gcc/cp/parser.c:20689
0x82abf1 cp_parser_function_definition_after_declarator
/home/marek/src/gcc/gcc/cp/parser.c:25351
0x82b8b4 cp_parser_function_definition_from_specifiers_and_declarator
/home/marek/src/gcc/gcc/cp/parser.c:25263
0x82b8b4 cp_parser_init_declarator
/home/marek/src/gcc/gcc/cp/parser.c:18429
0x82bb70 cp_parser_simple_declaration
/home/marek/src/gcc/gcc/cp/parser.c:12379
0x82be6a cp_parser_block_declaration
/home/marek/src/gcc/gcc/cp/parser.c:12248
0x835680 cp_parser_declaration
/home/marek/src/gcc/gcc/cp/parser.c:12145
0x833f16 cp_parser_declaration_seq_opt
/home/marek/src/gcc/gcc/cp/parser.c:12024
0x83422c cp_parser_translation_unit
/home/marek/src/gcc/gcc/cp/parser.c:4323
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
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Subject: [Bug c++/70639] internal compiler error: in guard_tinfo_to_string, at c-family/c-indentation.c:560
Date: Tue, 12 Apr 2016 16:35:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70639
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
This (completely untested) should fix it though:
diff --git a/gcc/c-family/c-indentation.c b/gcc/c-family/c-indentation.c
index 1da3f68..ddab880 100644
--- a/gcc/c-family/c-indentation.c
+++ b/gcc/c-family/c-indentation.c
@@ -556,6 +556,8 @@ guard_tinfo_to_string (const token_indent_info
&guard_tinfo)
return "while";
case RID_DO:
return "do";
+ case RID_SWITCH:
+ return "switch";
default:
gcc_unreachable ();
}
>From gcc-bugs-return-521968-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 16:44:14 2016
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Subject: [Bug c++/70639] internal compiler error: in guard_tinfo_to_string, at c-family/c-indentation.c:560
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--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Shorter testcase:
void bar (int);
void
foo (int x)
{
switch (x);
bar (x);
}
>From gcc-bugs-return-521969-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 16:45:49 2016
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Subject: [Bug c++/70639] internal compiler error: in guard_tinfo_to_string, at c-family/c-indentation.c:560
Date: Tue, 12 Apr 2016 16:45:00 -0000
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--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Weird that with my patch cc1plus warns like this
e.C: In function ‘void foo(int)’:
e.C:5:3: warning: this ‘switch’ clause does not guard...
[-Wmisleading-indentation]
switch (x);
^~~~~~
e.C:6:5: note: ...this statement, but the latter is misleadingly indented as if
it is guarded by the ‘switch’
bar (x);
^~~
while cc1 is quiet. Isn't the cc1plus warning bogus though?
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Subject: [Bug target/70381] On powerpc, -mfloat128 is on by default for all VSX systems
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Michael Meissner <meissner at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #8 from Michael Meissner <meissner at gcc dot gnu.org> ---
Subversion id 234843 on the trunk contains the fix.
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Subject: [Bug rtl-optimization/70596] [6 Regression] -fcompare-debug failure with one extra NOTE_INSN_DELETED
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Apr 12 17:18:31 2016
New Revision: 234906
URL: https://gcc.gnu.org/viewcvs?rev=234906&root=gcc&view=rev
Log:
PR rtl-optimization/70596
* lra-spills.c (spill_pseudos): Don't delete debug insns, instead
just invalidate LRA data and reset them. Adjust dump wording.
* gcc.target/i386/pr70596.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr70596.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/lra-spills.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-521973-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 17:22:52 2016
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Subject: [Bug rtl-optimization/70596] [6 Regression] -fcompare-debug failure with one extra NOTE_INSN_DELETED
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-521972-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 17:22:35 2016
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Subject: [Bug target/70640] New: IEEE 128-bit floating point negative/abs has two thinkos
Date: Tue, 12 Apr 2016 17:22:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70640
Bug ID: 70640
Summary: IEEE 128-bit floating point negative/abs has two
thinkos
Product: gcc
Version: 6.0
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Severity: normal
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In applying the second fix for PR 70381, I noticed that the test float128-1.c
does not run on the pre-gcc7 branch, which is a branch I am collecting fixes to
be pushed upstream when GCC 7.0 opens up. One of the features of this branch is
that the default for register allocator was changed from the traditional reload
to LRA.
In looking at the test, it is generating incorrect code for IEEE 128-bit
floating point negate for power7/power8 systems (power9 is correct, since it
has hardware support).
If you compile the following file with -O2 -mvsx -mfloat128:
__float128 foo (__float128 a) { return -a; }
It will generate the following with reload:
xxlorc 32,32,32
xxlxor 33,33,33
vslb 0,0,0
vsldoi 0,0,1,15
xxlxor 34,34,32
blr
But with -mlra, it will generate:
xxlxor 34,34,32
blr
The reason is due to this insn:
(define_insn "*ieee_128bit_vsx_neg<mode>2_internal"
[(set (match_operand:IEEE128 0 "register_operand" "=wa")
(neg:IEEE128 (match_operand:IEEE128 1 "register_operand" "wa")))
(use (match_operand:V16QI 2 "register_operand" "=v"))]
"TARGET_FLOAT128 && !TARGET_FLOAT128_HW"
"xxlxor %x0,%x1,%x2"
[(set_attr "type" "vecsimple")])
In particular, the (use ...) has a constraint of "=v" when it should have "v".
LRA notices it is an output constraint, and discards the previous insns that
generate the -0.0q constant used by the negative operation. In addition,
absolute value and negative absolute value have the same problem.
In addition, the expander for negative absolute value creates the wrong insn:
(define_insn_and_split "*ieee_128bit_vsx_nabs<mode>2"
[(set (match_operand:IEEE128 0 "register_operand" "=wa")
(neg:IEEE128
(abs:IEEE128
(match_operand:IEEE128 1 "register_operand" "wa"))))
(clobber (match_scratch:V16QI 2 "=v"))]
"TARGET_FLOAT128 && !TARGET_FLOAT128_HW && FLOAT128_IEEE_P (<MODE>mode)"
"#"
"&& 1"
[(parallel [(set (match_dup 0)
(abs:IEEE128 (match_dup 1)))
(use (match_dup 2))])]
{
if (GET_CODE (operands[2]) == SCRATCH)
operands[2] = gen_reg_rtx (V16QImode);
operands[3] = gen_reg_rtx (V16QImode);
emit_insn (gen_ieee_128bit_negative_zero (operands[2]));
}
[(set_attr "length" "8")
(set_attr "type" "vecsimple")])
I.e. it creates (abs ...) when it should create (neg (abs ...)).
>From gcc-bugs-return-521974-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 17:23:28 2016
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Subject: [Bug target/70640] IEEE 128-bit floating point negative/abs has two thinkos
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----------------------------------------------------------------------------
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Subject: [Bug c++/70571] [6 Regression] ICE on valid code on x86_64-linux-gnu in verify_ctor_sanity, at cp/constexpr.c:2259
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Indeed, Nathan patch for PR70501 fixed this, testing now
2016-04-12 Jakub Jelinek <jakub@redhat.com>
PR c++/70571
* g++.dg/ext/pr70571.C: New test.
--- gcc/testsuite/g++.dg/ext/pr70571.C.jj 2016-04-12 19:28:38.378163234
+0200
+++ gcc/testsuite/g++.dg/ext/pr70571.C 2016-04-12 19:28:06.000000000 +0200
@@ -0,0 +1,10 @@
+// PR c++/70571
+// { dg-do compile }
+
+typedef int V __attribute__ ((vector_size (sizeof (int))));
+
+void
+foo (V *x, V *y, int z)
+{
+ *x = (z == *y);
+}
and will commit it and close this PR once bootstrap/regtest with it is
finished.
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Subject: [Bug c++/68722] [4.9/5/6 Regression] internal compiler error: in merge_exception_specifiers, at cp/typeck2.c:2108
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--- Comment #4 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> ---
Author: paolo
Date: Tue Apr 12 17:54:34 2016
New Revision: 234909
URL: https://gcc.gnu.org/viewcvs?rev=234909&root=gcc&view=rev
Log:
/cp
2016-04-12 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/68722
* parser.c (cp_parser_cache_defarg): When file ends in default
argument simply return error_mark_node.
/testsuite
2016-04-12 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/68722
* g++.dg/parse/pr68722.C: New.
Added:
trunk/gcc/testsuite/g++.dg/parse/pr68722.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/parser.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/68722] [4.9/5 Regression] internal compiler error: in merge_exception_specifiers, at cp/typeck2.c:2108
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[4.9/5/6 Regression] |[4.9/5 Regression] internal
|internal compiler error: in |compiler error: in
|merge_exception_specifiers, |merge_exception_specifiers,
|at cp/typeck2.c:2108 |at cp/typeck2.c:2108
--- Comment #5 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Fixed in trunk so far.
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Subject: [Bug target/70640] IEEE 128-bit floating point negative/abs has two thinkos
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--- Comment #1 from Michael Meissner <meissner at gcc dot gnu.org> ---
Created attachment 38247
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38247&action=edit
Proposed patch to fix the problem
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Subject: [Bug c++/70571] [6 Regression] ICE on valid code on x86_64-linux-gnu in verify_ctor_sanity, at cp/constexpr.c:2259
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Apr 12 19:35:23 2016
New Revision: 234911
URL: https://gcc.gnu.org/viewcvs?rev=234911&root=gcc&view=rev
Log:
PR c++/70571
* g++.dg/ext/pr70571.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/ext/pr70571.C
Modified:
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/70501] [6 Regression] internal compiler error: in verify_ctor_sanity, at cp/constexpr.c:2249
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |su at cs dot ucdavis.edu
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
*** Bug 70571 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-521980-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 19:42:42 2016
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Subject: [Bug c++/70571] [6 Regression] ICE on valid code on x86_64-linux-gnu in verify_ctor_sanity, at cp/constexpr.c:2259
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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.
*** This bug has been marked as a duplicate of bug 70501 ***
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Subject: [Bug c++/70615] [6 Regression] ICE on valid code at -O1 and above on x86_64-linux-gnu in add_expr, at tree.c:7870
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Jason Merrill <jason at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Assignee|unassigned at gcc dot gnu.org |jason at gcc dot gnu.org
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Subject: [Bug target/70640] IEEE 128-bit floating point negative/abs has two thinkos
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Michael Meissner <meissner at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
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--- Comment #2 from Michael Meissner <meissner at gcc dot gnu.org> ---
Fixed in subversion id 234910.
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From: "su at cs dot ucdavis.edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70641] New: ICE on valid code at -O1 and above on x86_64-linux-gnu: verify_gimple failed
Date: Tue, 12 Apr 2016 20:52:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70641
Bug ID: 70641
Summary: ICE on valid code at -O1 and above on
x86_64-linux-gnu: verify_gimple failed
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: su at cs dot ucdavis.edu
Target Milestone: ---
The following code causes an ICE when compiled with the current GCC trunk at
-O1 and above on x86_64-linux-gnu in both 32-bit and 64-bit modes.
This is a regression from 5.3.x.
$ g++-trunk -v
Using built-in specs.
COLLECT_GCC=g++-trunk
COLLECT_LTO_WRAPPER=/usr/local/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/6.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto
--prefix=/usr/local/gcc-trunk --disable-bootstrap
Thread model: posix
gcc version 6.0.0 20160412 (experimental) [trunk revision 234895] (GCC)
$
$ g++-trunk -O0 -c small.cpp
$ g++-5.3 -O1 -c small.cpp
$
$ g++-trunk -O1 -c small.cpp
small.cpp: In function ‘void foo()’:
small.cpp:9:1: error: statement marked for throw, but doesn’t
}
^
# .MEM_2 = VDEF <.MEM_1(D)>
foo ();
small.cpp:9:1: internal compiler error: verify_gimple failed
0xd9bd4f verify_gimple_in_cfg(function*, bool)
../../gcc-source-trunk/gcc/tree-cfg.c:5125
0xc8a392 execute_function_todo
../../gcc-source-trunk/gcc/passes.c:1958
0xc8ac7b execute_todo
../../gcc-source-trunk/gcc/passes.c:2010
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
$
-----------------------------
void foo ()
{
try {
foo ();
}
catch ( ... ) {
__builtin_abort ();
}
}
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Subject: [Bug target/70630] [6 regression] sparc bootstrap failure: sparc.c:4919:6: error: suggest explicit braces to avoid ambiguous 'else'
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--- Comment #3 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Author: ebotcazou
Date: Tue Apr 12 20:55:05 2016
New Revision: 234918
URL: https://gcc.gnu.org/viewcvs?rev=234918&root=gcc&view=rev
Log:
2016-04-12 Eric Botcazou <ebotcazou@adacore.com>
PR target/70630
* config/sparc/sparc.c (sparc_compute_frame_size): Add parentheses.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/sparc/sparc.c
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Subject: [Bug target/70630] [6 regression] sparc bootstrap failure: sparc.c:4919:6: error: suggest explicit braces to avoid ambiguous 'else'
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--- Comment #5 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Author: ebotcazou
Date: Tue Apr 12 20:56:11 2016
New Revision: 234920
URL: https://gcc.gnu.org/viewcvs?rev=234920&root=gcc&view=rev
Log:
2016-04-12 Eric Botcazou <ebotcazou@adacore.com>
PR target/70630
* config/sparc/sparc.c (sparc_compute_frame_size): Add parentheses.
Modified:
branches/gcc-4_9-branch/gcc/ChangeLog
branches/gcc-4_9-branch/gcc/config/sparc/sparc.c
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Subject: [Bug target/70630] [6 regression] sparc bootstrap failure: sparc.c:4919:6: error: suggest explicit braces to avoid ambiguous 'else'
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--- Comment #4 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Author: ebotcazou
Date: Tue Apr 12 20:55:33 2016
New Revision: 234919
URL: https://gcc.gnu.org/viewcvs?rev=234919&root=gcc&view=rev
Log:
PR target/70630
* config/sparc/sparc.c (sparc_compute_frame_size): Add parentheses.
Modified:
branches/gcc-5-branch/gcc/ChangeLog
branches/gcc-5-branch/gcc/config/sparc/sparc.c
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Subject: [Bug target/70630] [6 regression] sparc bootstrap failure: sparc.c:4919:6: error: suggest explicit braces to avoid ambiguous 'else'
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
Target Milestone|6.0 |4.9.4
--- Comment #6 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
.
>From gcc-bugs-return-521989-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 21:18:41 2016
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Subject: [Bug c++/70642] New: Invalid alias template instantiation not rejected if previously used in SFINAE context
Date: Tue, 12 Apr 2016 21:18:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70642
Bug ID: 70642
Summary: Invalid alias template instantiation not rejected if
previously used in SFINAE context
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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Target Milestone: ---
Reduced from http://stackoverflow.com/q/36578055/2756719.
The following ill-formed code is incorrectly accepted by GCC:
template<bool, class> struct enable_if {};
template<class T> struct enable_if<true, T> { using type = T; };
template <typename X>
struct foo
{
template <typename R>
using meow = typename enable_if<sizeof(X) == 0, R>::type;
template <typename R = int> // 1
meow<R> bar () = delete;
int bar ()
{
meow<int> i; // 2
return 0; // 3
}
};
int j = foo<long>().bar();
Attempting to use i (by changing line #3 to 'return i;') causes an ICE:
prog.cc: In instantiation of 'int foo<X>::bar() [with X = long int]':
prog.cc:20:25: required from here
prog.cc:16:16: internal compiler error: in tsubst_copy, at cp/pt.c:14043
return i;
^
0x6019dd tsubst_copy
/home/heads/gcc/gcc-source/gcc/cp/pt.c:14041
0x602021 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
/home/heads/gcc/gcc-source/gcc/cp/pt.c:16993
0x5fdcd8 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
/home/heads/gcc/gcc-source/gcc/cp/pt.c:15802
0x5fda06 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
/home/heads/gcc/gcc-source/gcc/cp/pt.c:15114
0x5fd454 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
/home/heads/gcc/gcc-source/gcc/cp/pt.c:15104
0x5fdb73 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
/home/heads/gcc/gcc-source/gcc/cp/pt.c:15290
0x5fc36f instantiate_decl(tree_node*, int, bool)
/home/heads/gcc/gcc-source/gcc/cp/pt.c:22014
0x618c8b instantiate_pending_templates(int)
/home/heads/gcc/gcc-source/gcc/cp/pt.c:22131
0x636eed c_parse_final_cleanups()
/home/heads/gcc/gcc-source/gcc/cp/decl2.c:4599
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
The problem appears to only arise if the types in Lines #1 and #2 match (i.e.,
when the alias template has been instantiated in a SFINAE context already); if
either (but not both) is changed to, e.g., void, or if the first bar() overload
is removed, then the error is correctly diagnosed.
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Subject: [Bug c++/70634] [4.9/5/6 Regression] ICE on valid code on x86_64-linux-gnu: Segmentation fault (program cc1plus)
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Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |jason at gcc dot gnu.org
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Subject: [Bug sanitizer/70624] [6 Regression] Several hundred asan failures with 6.0 on x86_64-apple-darwin10.8
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--- Comment #6 from Jack Howarth <howarth.at.gcc at gmail dot com> ---
(In reply to Jakub Jelinek from comment #5)
> So can dyldVersionNumber be only used for #if SANITIZER_IOSSIM and otherwise
> use what it did before?
The IOSSIM code from llvm's sanitizer was never migrated into gcc so that would
be a red herring. The underlying issue is that the
/usr/lib/system/libdyld.dylib required for the current code to work was only
introduced in 10.7 (darwin11). So a test for the target being darwin10 or
earlier would be the appropriate test for utilizing the legacy code.
>From gcc-bugs-return-521992-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 21:53:19 2016
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Subject: [Bug sanitizer/70624] [6 Regression] Several hundred asan failures with 6.0 on x86_64-apple-darwin10.8
Date: Tue, 12 Apr 2016 21:53:00 -0000
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--- Comment #7 from Jack Howarth <howarth.at.gcc at gmail dot com> ---
Also, note that upstream has in compiler-rt/cmake/config-ix.cmake...
if(SANITIZER_MIN_OSX_VERSION VERSION_LESS "10.7")
message(FATAL_ERROR "Too old OS X version: ${SANITIZER_MIN_OSX_VERSION}")
endif()
so they haven't allowed building on 10.6 since
https://github.com/llvm-mirror/compiler-rt/commit/19c8451a0e798abcfd1762fa8196f22b43018d2e#diff-2eeb0237a3e7842df96b4c1280614125
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From: "cesar at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/70643] New: broken openacc reduction inside a fortran module
Date: Tue, 12 Apr 2016 22:29:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70643
Bug ID: 70643
Summary: broken openacc reduction inside a fortran module
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Keywords: openacc
Severity: normal
Priority: P3
Component: middle-end
Assignee: cesar at gcc dot gnu.org
Reporter: cesar at gcc dot gnu.org
CC: tschwinge at gcc dot gnu.org
Target Milestone: ---
Created attachment 38248
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38248&action=edit
broken test case
The attached test case causes an ICE in omp_low.c:lower_oacc_reductions because
that function is only guarding the incoming reduction variable against
INTEGER_CST when it comes time to build a mem_ref to it. Instead that function
should be checking if incoming is a TREE_CONSTANT.
Thomas reported this problem for gomp-4_0-branch here
<https://gcc.gnu.org/ml/gcc-patches/2016-04/msg00491.html>, and as he stated
this is also present in trunk. I'm testing a patch for it.
>From gcc-bugs-return-521994-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 22:31:36 2016
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Subject: [Bug c++/70641] [5/6 Regression] ICE on valid code at -O1 and above on x86_64-linux-gnu: verify_gimple failed
Date: Tue, 12 Apr 2016 22:31:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-checking
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-12
CC| |jakub at gcc dot gnu.org
Target Milestone|--- |5.4
Summary|ICE on valid code at -O1 |[5/6 Regression] ICE on
|and above on |valid code at -O1 and above
|x86_64-linux-gnu: |on x86_64-linux-gnu:
|verify_gimple failed |verify_gimple failed
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r221719.
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Subject: [Bug target/70107] ICE: in emit_move_insn, at expr.c:3546 with -mcpu=power8
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--- Comment #8 from Alan Modra <amodra at gcc dot gnu.org> ---
Author: amodra
Date: Tue Apr 12 22:59:05 2016
New Revision: 234925
URL: https://gcc.gnu.org/viewcvs?rev=234925&root=gcc&view=rev
Log:
Fix target/70107, another case of PR c++/70096
gcc/cp/
PR target/70107
PR c++/70096
* pt.c (tsubst_decl): Clear the DECL_MODE of the new decl.
gcc/testsuite/
* g++.dg/template/ptrmem30.C (read): Rename to data_read.
(Holder::foo): Reflect this.
PR c++/70096
* g++.dg/template/ptrmem30.C: New test.
Added:
branches/gcc-4_9-branch/gcc/testsuite/g++.dg/template/ptrmem30.C
Modified:
branches/gcc-4_9-branch/gcc/cp/ChangeLog
branches/gcc-4_9-branch/gcc/cp/pt.c
branches/gcc-4_9-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-521997-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 22:59:50 2016
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Subject: [Bug c++/70096] [6 Regression] [Invalid codegen] Read of uninitialized value in ref-qualified pointer to member function
Date: Tue, 12 Apr 2016 22:59:00 -0000
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--- Comment #9 from Alan Modra <amodra at gcc dot gnu.org> ---
Author: amodra
Date: Tue Apr 12 22:59:05 2016
New Revision: 234925
URL: https://gcc.gnu.org/viewcvs?rev=234925&root=gcc&view=rev
Log:
Fix target/70107, another case of PR c++/70096
gcc/cp/
PR target/70107
PR c++/70096
* pt.c (tsubst_decl): Clear the DECL_MODE of the new decl.
gcc/testsuite/
* g++.dg/template/ptrmem30.C (read): Rename to data_read.
(Holder::foo): Reflect this.
PR c++/70096
* g++.dg/template/ptrmem30.C: New test.
Added:
branches/gcc-4_9-branch/gcc/testsuite/g++.dg/template/ptrmem30.C
Modified:
branches/gcc-4_9-branch/gcc/cp/ChangeLog
branches/gcc-4_9-branch/gcc/cp/pt.c
branches/gcc-4_9-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-521996-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 22:59:24 2016
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Subject: [Bug target/70107] ICE: in emit_move_insn, at expr.c:3546 with -mcpu=power8
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--- Comment #7 from Alan Modra <amodra at gcc dot gnu.org> ---
Author: amodra
Date: Tue Apr 12 22:58:36 2016
New Revision: 234924
URL: https://gcc.gnu.org/viewcvs?rev=234924&root=gcc&view=rev
Log:
Fix target/70107, another case of PR c++/70096
gcc/cp/
PR target/70107
PR c++/70096
* pt.c (tsubst_decl): Clear the DECL_MODE of the new decl.
gcc/testsuite/
* g++.dg/template/ptrmem30.C (read): Rename to data_read.
(Holder::foo): Reflect this.
PR c++/70096
* g++.dg/template/ptrmem30.C: New test.
Added:
branches/gcc-5-branch/gcc/testsuite/g++.dg/template/ptrmem30.C
Modified:
branches/gcc-5-branch/gcc/cp/ChangeLog
branches/gcc-5-branch/gcc/cp/pt.c
branches/gcc-5-branch/gcc/testsuite/ChangeLog
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Subject: [Bug c++/70096] [6 Regression] [Invalid codegen] Read of uninitialized value in ref-qualified pointer to member function
Date: Tue, 12 Apr 2016 22:59:00 -0000
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--- Comment #8 from Alan Modra <amodra at gcc dot gnu.org> ---
Author: amodra
Date: Tue Apr 12 22:58:36 2016
New Revision: 234924
URL: https://gcc.gnu.org/viewcvs?rev=234924&root=gcc&view=rev
Log:
Fix target/70107, another case of PR c++/70096
gcc/cp/
PR target/70107
PR c++/70096
* pt.c (tsubst_decl): Clear the DECL_MODE of the new decl.
gcc/testsuite/
* g++.dg/template/ptrmem30.C (read): Rename to data_read.
(Holder::foo): Reflect this.
PR c++/70096
* g++.dg/template/ptrmem30.C: New test.
Added:
branches/gcc-5-branch/gcc/testsuite/g++.dg/template/ptrmem30.C
Modified:
branches/gcc-5-branch/gcc/cp/ChangeLog
branches/gcc-5-branch/gcc/cp/pt.c
branches/gcc-5-branch/gcc/testsuite/ChangeLog
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70107] ICE: in emit_move_insn, at expr.c:3546 with -mcpu=power8
Date: Tue, 12 Apr 2016 23:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70107
Alan Modra <amodra at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
Assignee|unassigned at gcc dot gnu.org |amodra at gmail dot com
Target Milestone|--- |4.9.4
--- Comment #9 from Alan Modra <amodra at gmail dot com> ---
Fixed
>From gcc-bugs-return-522000-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 12 23:57:21 2016
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From: "kugan at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/61839] More optimize opportunity for VRP
Date: Tue, 12 Apr 2016 23:57:00 -0000
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kugan at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |kugan at gcc dot gnu.org
Known to fail|4.10.0 |5.0
--- Comment #2 from kugan at gcc dot gnu.org ---
> - c = b != 0 ? 486097858 : 972195717;
> + c = a + 972195718 >> (b != 0);
...
> until the very end, not transforming c_6. Note that VRP could do the
> missing transform as it knows that _5 is [0, 1] (it has to jump through
> the shift - the value-range for the shift itself is too broad).
>
> If written this kind of transform should be applied more generally, not
> just for shifts. It basically wants to ask whether a conditional test
> can be carried out against another SSA name (and another constant) if
> an intermediate compute can be omitted in that case.
Do you mean something like,
diff --git a/gcc/tree-vrp.c b/gcc/tree-vrp.c
index bbdf9ce..dfce619 100644
--- a/gcc/tree-vrp.c
+++ b/gcc/tree-vrp.c
@@ -9902,6 +9902,47 @@ simplify_stmt_using_ranges (gimple_stmt_iterator *gsi)
{
enum tree_code rhs_code = gimple_assign_rhs_code (stmt);
tree rhs1 = gimple_assign_rhs1 (stmt);
+ tree rhs2 = gimple_assign_rhs2 (stmt);
+ tree var;
+
+ /* Convert:
+ COND_RES = X COMPARE Y
+ TMP = (CAST) COND_RES
+ LHS = CST BINOP TMP
+
+ To:
+ LHS = COND_RES ? (CST BINOP 1) : (CST BINOP 0) */
+
+ if (TREE_CODE_CLASS (rhs_code) == tcc_binary
+ && TREE_CODE (rhs1) == INTEGER_CST
+ && TREE_CODE (rhs2) == SSA_NAME
+ && is_gimple_assign (SSA_NAME_DEF_STMT (rhs2))
+ && gimple_assign_rhs_code (SSA_NAME_DEF_STMT (rhs2)) == NOP_EXPR
+ && (var = gimple_assign_rhs1 (SSA_NAME_DEF_STMT (rhs2)))
+ && TREE_CODE (var) == SSA_NAME
+ && is_gimple_assign (SSA_NAME_DEF_STMT (var))
+ && TREE_CODE_CLASS (gimple_assign_rhs_code (SSA_NAME_DEF_STMT (var)))
+ == tcc_comparison)
+
+ {
+ gimple_stmt_iterator gsi = gsi_for_stmt (stmt);
+ value_range *vr = get_value_range (var);
+ if (range_int_cst_p (vr)
+ && integer_zerop (vr->min)
+ && integer_onep (vr->max))
+ {
+
+ tree lhs = gimple_assign_lhs (stmt);
+ tree new_rhs1 = int_const_binop (rhs_code, rhs1, vr->min);
+ tree new_rhs2 = int_const_binop (rhs_code, rhs1, vr->max);
+
+ gimple *s = gimple_build_assign (lhs, COND_EXPR, var,
+ new_rhs1,
+ new_rhs2 PASS_MEM_STAT);
+ gsi_replace (&gsi, s, false);
+ return true;
+ }
+ }
switch (rhs_code)
{
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Subject: [Bug c++/70610] [6 regression] error: invalid initialization of non-const reference of type
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--- Comment #7 from Patrick Palka <ppalka at gcc dot gnu.org> ---
Author: ppalka
Date: Wed Apr 13 00:06:51 2016
New Revision: 234926
URL: https://gcc.gnu.org/viewcvs?rev=234926&root=gcc&view=rev
Log:
Fix PR c++/70610 (wrong overload resolution during template processing)
gcc/cp/ChangeLog:
PR c++/70610
* tree.c (lvalue_kind) [NON_DEPENDENT_EXPR]: Unconditionally
recurse into it.
* typeck.c (build_x_conditional_expr): Unconditionally remember
that the result is an lvalue or xvalue.
gcc/testsuite/ChangeLog:
PR c++/70610
* g++.dg/template/pr70610.C: New test.
* g++.dg/template/pr70610-2.C: New test.
* g++.dg/template/pr70610-3.C: New test.
* g++.dg/template/pr70610-4.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/template/pr70610-2.C
trunk/gcc/testsuite/g++.dg/template/pr70610-3.C
trunk/gcc/testsuite/g++.dg/template/pr70610-4.C
trunk/gcc/testsuite/g++.dg/template/pr70610.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/tree.c
trunk/gcc/cp/typeck.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/70610] [6 regression] error: invalid initialization of non-const reference of type
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Patrick Palka <ppalka at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #8 from Patrick Palka <ppalka at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-522003-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 13 02:15:20 2016
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Subject: [Bug c++/58822] Segfault when calling make_shared
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58822
--- Comment #27 from Michi Henning <michi at triodia dot com> ---
My apologies for my incredibly late reply. (I just stumbled across this issue
again.) And my thanks to you for taking the time to analyse this!
I think your analysis is right. 3.8.5/3:
"- the pointer is implicitly converted to a pointer to a virtual base class"
So, this is UB. Really nasty, in the sense that
make_shared<T>(args) doesn't always do the same thing as shared_ptr<T>(new
T(args))
Seeing how subtle this is, a warning for the implicit conversion to pointer to
base would be supremely useful.
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/58822] Segfault when calling make_shared
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|REOPENED |RESOLVED
Resolution|--- |INVALID
--- Comment #28 from Jonathan Wakely <redi at gcc dot gnu.org> ---
If you compile it with -fsanitize=undefined then at runtime you get:
/usr/include/c++/4.8/ext/new_allocator.h:120:4: runtime error: cast to virtual
base of address 0x0000013d1ca0 which does not point to an object of type
'InvalidArgumentException'
0x0000013d1ca0: note: object has invalid vptr
00 00 00 00 00 00 00 00 00 00 00 00 31 00 00 00 00 00 00 00 06 00 00 00 00
00 00 00 06 00 00 00
^~~~~~~~~~~~~~~~~~~~~~~
invalid vptr
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70644] New: Warn about implicit conversion of 'this' to pointer to virtual base class during construction
Date: Wed, 13 Apr 2016 07:39:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70644
Bug ID: 70644
Summary: Warn about implicit conversion of 'this' to pointer to
virtual base class during construction
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Keywords: diagnostic
Severity: normal
Priority: P3
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Target Milestone: ---
(Reduced from PR 58822)
struct Base { Base(int) { } };
int foo(Base*) { return 0; }
struct X : virtual Base {
X() : Base(foo(this)) { }
};
int main() {
X x;
}
The implicit conversion in the call foo(this) is undefined behaviour. It
violates [basic.life] 3.8p6 (6.3) by converting the object's address to a
pointer to virtual base before it is constructed.
There is no warning, and no ubsan error.
If the implicit conversion happens in a different scope, not inside the
constructor, then we get a ubsan error (and segfault):
struct Base { Base(int) { } };
struct X;
int foo(X*);
struct X : virtual Base {
X() : Base(foo(this)) { }
};
int foo(X* x) { Base* b = x; return 0; }
int main() {
X x;
}
vb.cc:10:27: runtime error: cast to virtual base of address 0x7ffd25ef32f0
which does not point to an object of type 'X'
0x7ffd25ef32f0: note: object has invalid vptr
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 90 0a 40 00 00
00 00 00 80 65 20 63
^~~~~~~~~~~~~~~~~~~~~~~
invalid vptr
Segmentation fault (core dumped)
Since the original example is also UB it would be good to either get a
diagnostic from the front end at the point of the implicit conversion, or at
least get a ubsan error..
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Subject: [Bug c++/58822] Segfault when calling make_shared
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--- Comment #29 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Michi Henning from comment #27)
> So, this is UB. Really nasty, in the sense that
>
> make_shared<T>(args) doesn't always do the same thing as shared_ptr<T>(new
> T(args))
It does do effectively the same thing. The difference in behaviour is because
when you use shared_ptr<T>(new T(this)) the implicit cast happens inside the
class, and the compiler can resolve it without inspecting the vtable.
When you use make_shared the implicit cast happens deep inside a nested
function and so it inspects the vtable, which is not yet valid because the base
object isn't constructed, so trying to access the vtable crashes.
You can cause the same crash by doing:
class InvalidArgumentException;
Exception* cast(InvalidArgumentException*);
class InvalidArgumentException : public virtual Exception
{
public:
explicit InvalidArgumentException(std::string const&)
: Exception(std::shared_ptr<ExceptionImplBase>(new
ExceptionImplBase(cast(this))))
{
}
virtual ~InvalidArgumentException() noexcept {}
};
Exception* cast(InvalidArgumentException* p) { return p; }
The function 'cast' moves the implicit cast into a separate function, which
reproduces the same crash.
It should be possible to add a warning for the case where the cast happens
inside the class (which doesn't crash, but is still UB) but it won't be
possible to warn for the other cases, because at the site of the implicit cast
the compiler doesn't know whether the pointer refers to a constructed object or
not. I've created PR 70644.
>From gcc-bugs-return-522007-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 13 07:40:02 2016
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Subject: [Bug c++/70636] Link failure when C++ brace initialization is used
Date: Wed, 13 Apr 2016 07:40:00 -0000
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This looks familiar, it might be a duplicate of another bug.
>From gcc-bugs-return-522008-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 13 08:25:33 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70566] [4.9/5 Regression] Bad ARM code generated for evaluating unsigned int bitfield value
Date: Wed, 13 Apr 2016 08:25:00 -0000
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--- Comment #13 from ktkachov at gcc dot gnu.org ---
Author: ktkachov
Date: Wed Apr 13 08:24:43 2016
New Revision: 234931
URL: https://gcc.gnu.org/viewcvs?rev=234931&root=gcc&view=rev
Log:
[ARM] PR target/70566 Check that condition register is dead in tst-imm ->
lsls-imm Thumb2 peepholes
Backport from mainline
2016-04-08 Kyrylo Tkachov <kyrylo.tkachov@arm.com>
PR target/70566
* config/arm/thumb2.md (tst + branch-> lsls + branch
peephole below *orsi_not_shiftsi_si): Require that condition
register is dead after the peephole.
(second peephole after the above): Likewise.
* gcc.c-torture/execute/pr70566.c: New test.
Added:
branches/gcc-4_9-branch/gcc/testsuite/gcc.c-torture/execute/pr70566.c
Modified:
branches/gcc-4_9-branch/gcc/ChangeLog
branches/gcc-4_9-branch/gcc/config/arm/thumb2.md
branches/gcc-4_9-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-522009-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 13 08:32:12 2016
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Subject: [Bug target/70566] [4.9/5/6 Regression] Bad ARM code generated for evaluating unsigned int bitfield value
Date: Wed, 13 Apr 2016 08:32:00 -0000
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ktkachov at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
Summary|[4.9/5 Regression] Bad ARM |[4.9/5/6 Regression] Bad
|code generated for |ARM code generated for
|evaluating unsigned int |evaluating unsigned int
|bitfield value |bitfield value
--- Comment #14 from ktkachov at gcc dot gnu.org ---
Fixed on all active branches.
Thanks for the bug report.
>From gcc-bugs-return-522010-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 13 08:35:17 2016
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Subject: [Bug c++/70594] [6 Regression] -fcompare-debug failure
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--- Comment #28 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
For the #c0 difference with the #c20 instrumentation there is:
/tmp/uids:"yynewstate" label_decl 101636 0 3
/tmp/uids:"yyabortlab" label_decl 101638 0 3
/tmp/uids:"yyacceptlab" label_decl 101639 0 3
/tmp/uids:"yyacceptlab" label_decl 139896 0 2
/tmp/uids:"yyabortlab" label_decl 139897 0 2
/tmp/uids:"yynewstate" label_decl 139898 0 2
/tmp/uids_:"yynewstate" label_decl 101633 0 3
/tmp/uids_:"yyabortlab" label_decl 101635 0 3
/tmp/uids_:"yyacceptlab" label_decl 101636 0 3
/tmp/uids_:"yynewstate" label_decl 139354 0 2
/tmp/uids_:"yyacceptlab" label_decl 139357 0 2
/tmp/uids_:"yyabortlab" label_decl 139358 0 2
which means that it is all about LABEL_DECLs, which are first created using
build_decl in the same order, just with tiny differences in DECL_UID, but then
the are copy_node copied in different order. So guess the question is why they
are copied in the different order.
>From gcc-bugs-return-522012-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 13 08:58:57 2016
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Subject: [Bug c++/70594] [6 Regression] -fcompare-debug failure
Date: Wed, 13 Apr 2016 08:58:00 -0000
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--- Comment #29 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The different order of copy_node_stat happens during tree_function_versioning
-> remap_blocks -> remap_block -> remap_decls -> remap_decl ->
copy_decl_no_change -> copy_node_stat, and the BLOCK_VARS are already ordered
differently there:
BLOCK #0
SUPERCONTEXT: XXXXX_yyparse
SUBBLOCKS: BLOCK #621 BLOCK #623
VARS: yynewstate yysetstate yybackup yyacceptlab yyabortlab yyssa yyssp yyn
yyresult
vs.
BLOCK #0
SUPERCONTEXT: XXXXX_yyparse
SUBBLOCKS: BLOCK #676 BLOCK #678
VARS: yybackup yyacceptlab yyabortlab yynewstate yysetstate yystate
yyerrstatus yyssa yyss yyssp yyvsa yyvs yyvsp yystacksize yyn yyresult yytoken
yyval yylen
(the first one is from -g0, the latter -g2). Let me debug where the order
comes from.
>From gcc-bugs-return-522011-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 13 08:58:04 2016
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Subject: [Bug middle-end/70638] transaction_wrap: too strict compatibility check and transaction_pure wrappers fail to wrap
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Hillel <hillel.avni at huawei dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |hillel.avni at huawei dot com
--- Comment #2 from Hillel <hillel.avni at huawei dot com> ---
On gcc-linaro-4.9-2014.11, I must declare the wrapper as pure.
Safe / unsafe wrappers do not compile.
>From gcc-bugs-return-522013-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 13 09:09:02 2016
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Subject: [Bug tree-optimization/70130] [6 Regression] h264ref fails with verification error starting with r231674
Date: Wed, 13 Apr 2016 09:09:00 -0000
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Alan Modra <amodra at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Last reconfirmed| |2016-04-13
CC| |amodra at gmail dot com
Resolution|INVALID |---
Ever confirmed|0 |1
--- Comment #7 from Alan Modra <amodra at gmail dot com> ---
My analysis says this is not a linker error. Pass/fail depends on whether
"img" points to a 16-byte aligned ImageParameters or only 8-byte aligned, and
that depends on how commons happen to be laid out.
Curiously, when the ImageParameters struct is 16-byte aligned, img->mprr_2 is
*not* 16-byte aligned since its offset is 4792 bytes.
>From gcc-bugs-return-522014-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 13 10:01:57 2016
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Subject: [Bug c++/70594] [6 Regression] -fcompare-debug failure
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--- Comment #30 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Ah, the reason is clear,
hash_table<named_label_hasher> *x_named_labels;
hashes based on DECL_UID (that is fine), and adds the labels during hash table
traversal (which is not fine).
Both:
static void
pop_labels (tree block)
{
if (named_labels)
{
named_labels->traverse<tree, pop_labels_1> (block);
named_labels = NULL;
}
}
and
poplevel's
if (cfun && !functionbody && named_labels)
named_labels->traverse<cp_binding_level *, poplevel_named_label_1>
(current_binding_level);
look wrong in this regard.
>From gcc-bugs-return-522015-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 13 10:07:36 2016
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Subject: [Bug debug/70628] [5/6 regression] ICE in get_reg_rtx, at emit-rtl.c:1025
Date: Wed, 13 Apr 2016 10:07:00 -0000
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Jiong Wang <jiwang at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jiwang at gcc dot gnu.org
--- Comment #9 from Jiong Wang <jiwang at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #7)
> Created attachment 38242 [details]
> gcc6-pr70628.patch
>
> IMNSHO simplify-rtx.c should never generate instructions, it carefully uses
> gen_lowpart_no_emit hook instead of gen_lowpart etc., but the
> convert_memory_addr seems to be the only cases which violate this.
And looks to me postreload is doing uncessary transformation.
AArch64 failed the following check in reload_cse_simplify_operands:
if (MEM_P (op)
&& GET_MODE_BITSIZE (GET_MODE (op)) < BITS_PER_WORD
&& LOAD_EXTEND_OP (GET_MODE (op)) != UNKNOWN)
{
because for ILP32, we still define UNITS_PER_WORD to be 8, while x86 defined
that to be 4, thus AArch64 triggered those "make the extension explicit" code,
and trying to transform
(insn 341 111 108 12 (set (reg/f:SI 0 x0 [189])
(mem/c:SI (plus:DI (reg/f:DI 29 x29)
(const_int 104 [0x68])) [5 %sfp+-8 S4 A32])) bug-1.c:23 49
{*movsi_aarch64}
(nil))
into:
(insn 341 111 108 12 (set (reg:DI 0 x0)
(zero_extend:DI (mem/c:SI (plus:DI (reg/f:DI 29 x29)
(const_int 104 [0x68])) [5 %sfp+-8 S4 A32]))) bug-1.c:23 84
{*zero_extendsidi2_aarch64}
(nil))
which looks uncessary to me.
>From gcc-bugs-return-522016-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 13 10:12:03 2016
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Subject: [Bug c++/70594] [6 Regression] -fcompare-debug failure
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--- Comment #31 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 38249
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gcc6-pr70594-labels.patch
Only the first spot is problematic IMHO, the latter is only for diagnostics,
and I think we don't care that much if for multiple errors in there we diagnose
in the exact same order for -g vs. -g0.
>From gcc-bugs-return-522017-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 13 11:02:30 2016
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Subject: [Bug tree-optimization/70130] [6 Regression] h264ref fails with verification error starting with r231674
Date: Wed, 13 Apr 2016 11:02:00 -0000
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Alan Modra <amodra at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #8 from Alan Modra <amodra at gmail dot com> ---
Confirmed. So with "images" (the ImageParameters struct) 16-byte aligned, the
misaligned code path is taken through Loop_err. With images not 16-byte
aligned, img->mprr_2 *is* 16-byte aligned, and we take the vectorized code
path. Which is buggy.
This is the first difference in img->mprr2 on exit from Loop_err, "images"
aligned case, ie. non-vectorized
(gdb)
0x1012e548 <images+5528>: 0xd710d710
(gdb)
0x1012e54c <images+5532>: 0xd710d710
(gdb)
0x1012e550 <images+5536>: 0xd710d710
(gdb)
0x1012e554 <images+5540>: 0xd710d710
(gdb)
0x1012e558 <images+5544>: 0xd710d710
(gdb)
0x1012e55c <images+5548>: 0xd710d710
(gdb)
0x1012e560 <images+5552>: 0xd710d710
(gdb)
0x1012e564 <images+5556>:0xd710d710
versus "images" not aligned, ie. taking vectorized path
(gdb)
0x1012e540 <images+5528>: 0x00000000
(gdb)
0x1012e544 <images+5532>: 0x00000000
(gdb)
0x1012e548 <images+5536>: 0x00000000
(gdb)
0x1012e54c <images+5540>: 0x00000000
(gdb)
0x1012e550 <images+5544>: 0x00000000
(gdb)
0x1012e554 <images+5548>: 0x00000000
(gdb)
0x1012e558 <images+5552>: 0x00000000
(gdb)
0x1012e55c <images+5556>: 0x00000000
This is img->mprr_2[1][7][0..15]
>From gcc-bugs-return-522018-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 13 11:08:12 2016
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Subject: [Bug tree-optimization/70130] [6 Regression] h264ref fails with verification error starting with r231674
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--- Comment #9 from rguenther at suse dot de <rguenther at suse dot de> ---
On Wed, 13 Apr 2016, amodra at gmail dot com wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70130
>
> Alan Modra <amodra at gmail dot com> changed:
>
> What |Removed |Added
> ----------------------------------------------------------------------------
> Status|RESOLVED |REOPENED
> Last reconfirmed| |2016-04-13
> CC| |amodra at gmail dot com
> Resolution|INVALID |---
> Ever confirmed|0 |1
>
> --- Comment #7 from Alan Modra <amodra at gmail dot com> ---
> My analysis says this is not a linker error. Pass/fail depends on whether
> "img" points to a 16-byte aligned ImageParameters or only 8-byte aligned, and
> that depends on how commons happen to be laid out.
>
> Curiously, when the ImageParameters struct is 16-byte aligned, img->mprr_2 is
> *not* 16-byte aligned since its offset is 4792 bytes.
So does DECL_ALIGN agree with the choice by the linker?
>From gcc-bugs-return-522019-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 13 11:15:00 2016
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Subject: [Bug tree-optimization/70130] [6 Regression] h264ref fails with verification error starting with r231674
Date: Wed, 13 Apr 2016 11:14:00 -0000
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--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
Btw, which loop is it in this function? There are multiple ones. I assume
the last loop nest:
for (j=0;j< MB_BLOCK_SIZE;j++)
{
for (i=0;i< MB_BLOCK_SIZE;i++)
{
img->mprr_2[PLANE_16][j][i]=max(0,min((int)img->max_imgpel_value,(iaa+(i-7)*ib
+(j-7)*ic + 16)/32));// store plane prediction
}
}
> With images not 16-byte aligned, img->mprr_2 *is* 16-byte aligned, and we take > the vectorized code path.
I'd say it _happens_ to be 16-byte aligned (by luck). I assume nothing alignes
*img to sth bigger than 8 bytes and thus whether mprr_2 is aligned to 16 bytes
or not depends on random things (like the linker version).
>From gcc-bugs-return-522020-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 13 11:34:47 2016
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Subject: [Bug rtl-optimization/70625] [4.9/5 Regression] Memory exhaustion when building specific snippet at -O2
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--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
This is a duplicate of PR70623.
>From gcc-bugs-return-522022-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 13 11:35:45 2016
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Subject: [Bug tree-optimization/70130] [6 Regression] h264ref fails with verification error starting with r231674
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--- Comment #11 from Alan Modra <amodra at gmail dot com> ---
Created attachment 38250
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stand alone testcase
Compile with -m64 -O3 -mcpu=power7 -fno-common
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Subject: [Bug tree-optimization/70623] [4.9/5/6 Regression] ICE in compute_antic at -O2
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|6.0 |4.9.4
Summary|[6 Regression] ICE in |[4.9/5/6 Regression] ICE in
|compute_antic at -O2 |compute_antic at -O2
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Same issue appears on the branches with the testcase from PR70625. Fix that
fixes both in testing.
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Subject: [Bug preprocessor/69650] [6 Regression] ICE in linemap_line_start, at libcpp/line-map.c:803
Date: Wed, 13 Apr 2016 11:41:00 -0000
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--- Comment #58 from Bernd Schmidt <bernds at gcc dot gnu.org> ---
Author: bernds
Date: Wed Apr 13 11:40:37 2016
New Revision: 234932
URL: https://gcc.gnu.org/viewcvs?rev=234932&root=gcc&view=rev
Log:
Patch from Roger Orr <rogero@howzatt.demon.co.uk>
PR preprocessor/69650
* directives.c (do_linemarker): Reread map after calling
cpp_get_token.
Modified:
trunk/libcpp/ChangeLog
trunk/libcpp/directives.c
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Subject: [Bug preprocessor/69650] [6 Regression] ICE in linemap_line_start, at libcpp/line-map.c:803
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Bernd Schmidt <bernds at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|REOPENED |RESOLVED
Resolution|--- |FIXED
--- Comment #59 from Bernd Schmidt <bernds at gcc dot gnu.org> ---
Should be fixed for good now.
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Subject: [Bug tree-optimization/70130] [6 Regression] h264ref fails with verification error starting with r231674
Date: Wed, 13 Apr 2016 12:13:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #12 from Richard Biener <rguenth at gcc dot gnu.org> ---
The preprocessed source hints at the
for (j=0; j < MB_BLOCK_SIZE; j++)
{
for (i=0; i < MB_BLOCK_SIZE; i++)
{
img->mprr_2[VERT_PRED_16][j][i]=s[i][0]; // store vertical prediction
img->mprr_2[HOR_PRED_16 ][j][i]=s[j][1]; // store horizontal prediction
img->mprr_2[DC_PRED_16 ][j][i]=s0; // store DC prediction
}
}
loop instead. Where I see
bb3:
vect__39.11_16 = MEM[(int *)vectp_s.13_15];
vect__39.14_17 = __builtin_altivec_mask_for_load (vectp_s.13_13);
...
bb4:
# vect__39.15_18 = PHI <vect__39.18_24(8), vect__39.11_16(3)>
# vectp_s.16_20 = PHI <vectp_s.16_22(8), vectp_s.17_19(3)>
vectp_s.16_23 = vectp_s.16_20 & -16B;
vect__39.18_24 = MEM[(int *)vectp_s.16_23];
vect__39.19_1 = REALIGN_LOAD <vect__39.15_18, vect__39.18_24,
vect__39.14_17>;
vectp_s.16_314 = vectp_s.16_20 + 18446744073709551608;
(oops)
...
vectp_s.16_22 = vectp_s.16_314 + 16;
...
if (ivtmp_210 < 15)
goto <bb 8>;
else
goto <bb 7>;
<bb 8>:
goto <bb 4>;
the (oops) marked IV adjustment breaks the realign-optimized handling
I believe. It adjusts for the group gap (it subtracts 8 from the pointer)
and thus makes both the mask and the previous load value invalid.
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Subject: [Bug c++/70594] [6 Regression] -fcompare-debug failure
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--- Comment #32 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 38251
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38251&action=edit
gcc6-pr70594.patch
Alternate patch for the SRA fancy names in -fdump-final-insns= dumps (and other
TDF_NOUID dumps).
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Subject: [Bug debug/70628] [5/6 regression] ICE in get_reg_rtx, at emit-rtl.c:1025
Date: Wed, 13 Apr 2016 12:27:00 -0000
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--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Apr 13 12:26:26 2016
New Revision: 234933
URL: https://gcc.gnu.org/viewcvs?rev=234933&root=gcc&view=rev
Log:
PR debug/70628
* rtl.h (convert_memory_address_addr_space_1): New prototype.
* explow.c (convert_memory_address_addr_space_1): No longer static,
add NO_EMIT argument and don't call convert_modes if true, pass
it down recursively, remove break after return.
(convert_memory_address_addr_space): Adjust caller.
* simplify-rtx.c (simplify_unary_operation_1): Call
convert_memory_address_addr_space_1 instead of convert_memory_address,
if it returns NULL, don't simplify.
* gcc.dg/torture/pr70628.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr70628.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/explow.c
trunk/gcc/rtl.h
trunk/gcc/simplify-rtx.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug target/70633] [5/6 Regression] ICE on valid code at -Os (in 32-bit mode) on x86_64-linux-gnu: output_operand: invalid expression as operand
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Apr 13 12:27:52 2016
New Revision: 234934
URL: https://gcc.gnu.org/viewcvs?rev=234934&root=gcc&view=rev
Log:
PR middle-end/70633
* gimplify.c (gimplify_init_constructor): Clear TREE_STATIC if
gimplification turns some element into non-constant.
* gcc.c-torture/compile/pr70633.c: New test.
Added:
trunk/gcc/testsuite/gcc.c-torture/compile/pr70633.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gimplify.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug tree-optimization/70130] [6 Regression] h264ref fails with verification error starting with r231674
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--- Comment #13 from Richard Biener <rguenth at gcc dot gnu.org> ---
Does the following fix it? I'm not entirely happy with it because of the
comment.
Index: gcc/tree-vect-stmts.c
===================================================================
--- gcc/tree-vect-stmts.c (revision 234894)
+++ gcc/tree-vect-stmts.c (working copy)
@@ -6876,6 +6875,12 @@ vectorizable_load (gimple *stmt, gimple_
gcc_assert (!load_lanes_p
|| alignment_support_scheme == dr_aligned
|| alignment_support_scheme == dr_unaligned_supported);
+ /* If vectors are not adjacent we can't do dr_explicit_realign_optimized.
+ ??? This fails to account for the cost of this but it's messy to
+ compute all this from within vect_supportable_dr_alignment. */
+ if (group_gap_adj != 0
+ && alignment_support_scheme == dr_explicit_realign_optimized)
+ alignment_support_scheme = dr_explicit_realign;
/* In case the vectorization factor (VF) is bigger than the number
of elements that we can fit in a vectype (nunits), we have to generate
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Subject: [Bug c++/70641] [5/6 Regression] ICE on valid code at -O1 and above on x86_64-linux-gnu: verify_gimple failed
Date: Wed, 13 Apr 2016 12:35:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
CC| |hubicka at gcc dot gnu.org
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Subject: [Bug target/70633] [5 Regression] ICE on valid code at -Os (in 32-bit mode) on x86_64-linux-gnu: output_operand: invalid expression as operand
Date: Wed, 13 Apr 2016 12:36:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[5/6 Regression] ICE on |[5 Regression] ICE on valid
|valid code at -Os (in |code at -Os (in 32-bit
|32-bit mode) on |mode) on x86_64-linux-gnu:
|x86_64-linux-gnu: |output_operand: invalid
|output_operand: invalid |expression as operand
|expression as operand |
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed on the trunk so far.
>From gcc-bugs-return-522032-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 13 12:37:16 2016
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Subject: [Bug debug/70628] [5 regression] ICE in get_reg_rtx, at emit-rtl.c:1025
Date: Wed, 13 Apr 2016 12:37:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[5/6 regression] ICE in |[5 regression] ICE in
|get_reg_rtx, at |get_reg_rtx, at
|emit-rtl.c:1025 |emit-rtl.c:1025
--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed on the trunk so far.
>From gcc-bugs-return-522033-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 13 12:57:27 2016
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Subject: [Bug c++/70627] [6 Regression] internal compiler error: verify_type failed
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--- Comment #7 from jseward at acm dot org ---
I tried the fix at PR70029 comment 7 (disabling a check) but that
doesn't help, at least for the original, unreduced test case
(Unified_cpp_dom_animation0.ii).
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Subject: [Bug middle-end/70638] transaction_wrap: too strict compatibility check and transaction_pure wrappers fail to wrap
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--- Comment #3 from torvald at gcc dot gnu.org ---
(In reply to Hillel Avni from comment #2)
> On gcc-linaro-4.9-2014.11, I must declare the wrapper as pure.
But using that version the wrapper was indeed used and not the original
function, right? In that case, this part of this bug report would be a
regression.
>From gcc-bugs-return-522035-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 13 13:02:57 2016
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Subject: [Bug c++/70641] [5/6 Regression] ICE on valid code at -O1 and above on x86_64-linux-gnu: verify_gimple failed
Date: Wed, 13 Apr 2016 13:02:00 -0000
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Guess in the
if (callee_t && recursive_call_p (current_function_decl, callee_t))
continue;
case we should set some bool flag, and if we decide to set nothrow flag at the
end and we saw some recursive calls, we should adjust them.
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Subject: [Bug middle-end/70638] transaction_wrap: too strict compatibility check and transaction_pure wrappers fail to wrap
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--- Comment #4 from Hillel Avni <hillel.avni at huawei dot com> ---
(In reply to torvald from comment #3)
> (In reply to Hillel Avni from comment #2)
> > On gcc-linaro-4.9-2014.11, I must declare the wrapper as pure.
>
> But using that version the wrapper was indeed used and not the original
> function, right? In that case, this part of this bug report would be a
> regression.
Yes, the wrapper is used.
>From gcc-bugs-return-522037-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 13 13:18:32 2016
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Subject: [Bug fortran/58000] Accept OPEN( ... NAME=) with -std=legacy
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--- Comment #5 from dominiq at gcc dot gnu.org ---
Author: dominiq
Date: Wed Apr 13 13:17:45 2016
New Revision: 234936
URL: https://gcc.gnu.org/viewcvs?rev=234936&root=gcc&view=rev
Log:
2016-04-13 Dominique d'Humieres <dominiq@lps.ens.fr>
PR fortran/58000
* gfortran.texi: Document OPEN( ... NAME=) as not implemented
in GNU Fortran
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/gfortran.texi
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |WONTFIX
--- Comment #6 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Jerry,
Thanks for the review.
Documented as not implemented, closing as WONTFIX.
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Subject: [Bug libstdc++/70607] The return type of std::conj must be std::complex<T>
Date: Wed, 13 Apr 2016 13:53:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70607
--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Aha, that DR was reverted by http://wg21.link/lwg1522 (I failed to find it
because the deleted text says "All the specified ..." and I searched for "All
of the specified ..."
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Subject: [Bug tree-optimization/70130] [6 Regression] h264ref fails with verification error starting with r231674
Date: Wed, 13 Apr 2016 13:56:00 -0000
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--- Comment #14 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Unfortunately the patch doesn't help with Alan's streamlined test. It still
fails (tested on powerpc64le).
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Subject: [Bug debug/70628] [5 regression] ICE in get_reg_rtx, at emit-rtl.c:1025
Date: Wed, 13 Apr 2016 13:58:00 -0000
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--- Comment #12 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Apr 13 13:57:29 2016
New Revision: 234937
URL: https://gcc.gnu.org/viewcvs?rev=234937&root=gcc&view=rev
Log:
PR debug/70628
* explow.c (convert_memory_address_addr_space_1): Formatting fix.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/explow.c
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Subject: [Bug tree-optimization/70130] [6 Regression] h264ref fails with verification error starting with r231674
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--- Comment #15 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Created attachment 38252
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Vectorization dump without patch
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Subject: [Bug tree-optimization/70130] [6 Regression] h264ref fails with verification error starting with r231674
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--- Comment #16 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Created attachment 38253
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Vectorization dump with patch applied
>From gcc-bugs-return-522044-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 13 14:04:05 2016
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Subject: [Bug tree-optimization/70130] [6 Regression] h264ref fails with verification error starting with r231674
Date: Wed, 13 Apr 2016 14:04:00 -0000
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--- Comment #17 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Though as I look at it, the "p" field is undefined in Alan's test. Let me fix
that and see what we get.
>From gcc-bugs-return-522045-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 13 14:06:28 2016
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Subject: [Bug tree-optimization/70130] [6 Regression] h264ref fails with verification error starting with r231674
Date: Wed, 13 Apr 2016 14:06:00 -0000
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--- Comment #18 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Never mind, it would get zero initialization, and specifying that directly
doesn't help.
>From gcc-bugs-return-522046-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 13 14:08:32 2016
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Subject: [Bug c++/70641] [5/6 Regression] ICE on valid code at -O1 and above on x86_64-linux-gnu: verify_gimple failed
Date: Wed, 13 Apr 2016 14:08:00 -0000
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 38254
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gcc6-pr70641.patch
Untested fix.
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/70623] [4.9/5/6 Regression] ICE in compute_antic at -O2
Date: Wed, 13 Apr 2016 14:16:00 -0000
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--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
"Patch" in testing. Note that the issue seems to be oscillating values because
of bitmap_set_and only taking expressions from 'dest', pruning out those
for which the value-and removed their value. But
mem_ref<0B>,addr_expr<&av>}@.MEM_5 (0005)
mem_ref<0B>,av.0_8}@.MEM_7(D) (0006)
_9 (0006)
and with only 0006 in the value-and but mem_ref<0B>,av.0_8}@.MEM_7(D) (0006)
in the expr-set we get 0006 dropped in clean (). In a different iteration
mem_ref<0B>,av.0_8}@.MEM_7(D) gets exchanged for _9 (0006) and it re-appears.
The solution seems to be to union the expr-sets in bitmap_set_and before
pruning expressions no longer in the value-intersection.
But then clean () uses bitmap_remove_from_set which does
unsigned int val = get_expr_value_id (expr);
if (!value_id_constant_p (val))
{
bitmap_clear_bit (&set->values, val);
bitmap_clear_bit (&set->expressions, get_expression_id (expr));
}
and thus seems to rely on there being exactly one expression for each value
in a bitmap-set. bitmap_find_leader does
if (bitmap_set_contains_value (set, val))
{
unsigned int i;
bitmap_iterator bi;
bitmap exprset = value_expressions[val];
EXECUTE_IF_AND_IN_BITMAP (exprset, &set->expressions, 0, i, bi)
return expression_for_id (i);
so kind-of would agree with that.
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From: "demoonlit at panathenaia dot halfmoon.jp" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug ada/70645] New: [4.9/5/6 Regression] -fguess-branch-probability breaks debug-information, only in Ada
Date: Wed, 13 Apr 2016 14:18:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70645
Bug ID: 70645
Summary: [4.9/5/6 Regression] -fguess-branch-probability breaks
debug-information, only in Ada
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: ada
Assignee: unassigned at gcc dot gnu.org
Reporter: demoonlit at panathenaia dot halfmoon.jp
Target Milestone: ---
I can not debug some executable files generated by recent gcc Ada frontend,
with all optimization-levels including -fguess-branch-probability.
(I'm troubled with -Og. I've understood that -Og is intended to debug.)
gcc-4.9, gcc-5, and gcc-6 have failed.
However, gcc-4.8 works well.
C/C++ and Fortran frontends work well on all versions.
Note, I tried gdb from 7.9 to 7.11 as debugger.
% cat hello.adb
with Ada.Text_IO;
procedure Hello is
begin
Ada.Text_IO.Put_Line ("Hello.");
end Hello;
% gcc -v
gcc (GCC) 6.0.0 20160401 (experimental)
Copyright (C) 2016 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
% gnatmake -g -Og hello
gcc -c -g -Og hello.adb
gnatbind -x hello.ali
gnatlink hello.ali -g -Og
% gdb hello
GNU gdb (GDB) 7.11
Copyright (C) 2016 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-apple-darwin10.8.0".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from hello...Reading symbols from
hello.dSYM/Contents/Resources/DWARF/hello...done.
done.
(gdb) start
Temporary breakpoint 1 at 0x1000014f1
Starting program: hello
Temporary breakpoint 1, 0x00000001000014f1 in hello ()
(gdb) s
Single stepping until exit from function _ada_hello,
which has no line number information. # <<<< Please look here !!!!
Hello.
main (argc=<optimized out>, argv=<optimized out>, envp=<optimized out>)
at b~hello.adb:197
197 adafinal;
(gdb) quit
A debugging session is active.
Inferior 1 [process 45663] will be killed.
Quit anyway? (y or n) y
% gnatmake -f -g -Og -fno-guess-branch-probability hello
gcc -c -g -Og -fno-guess-branch-probability hello.adb
gnatbind -x hello.ali
gnatlink hello.ali -g -Og -fno-guess-branch-probability
% gdb hello
GNU gdb (GDB) 7.11
Copyright (C) 2016 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-apple-darwin10.8.0".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from hello...Reading symbols from
hello.dSYM/Contents/Resources/DWARF/hello...done.
done.
(gdb) start
Temporary breakpoint 1 at 0x10000154e: file hello.adb, line 2.
Starting program: hello
Temporary breakpoint 1, _ada_hello () at hello.adb:2
2 procedure Hello is
(gdb) s
4 Ada.Text_IO.Put_Line ("Hello."); # <<<< It works fine.
(gdb) s
ada__text_io__put_line__2 (item=...) at a-textio.adb:1424
1424 procedure Put_Line (Item : String) is
(gdb) quit
A debugging session is active.
Inferior 1 [process 45704] will be killed.
Quit anyway? (y or n) y
# **** Example of gcc-4.8 from here: ****
% gcc --version
gcc (GCC) 4.8.1
Copyright (C) 2013 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
% gnatmake -f -g -Og hello
gcc -c -g -Og hello.adb
gnatbind -x hello.ali
gnatlink hello.ali -g -Og
% gdb hello
GNU gdb (GDB) 7.11
Copyright (C) 2016 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-apple-darwin10.8.0".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from hello...
warning: dsym file UUID doesn't match the one in hello
done.
(gdb) start
Temporary breakpoint 1 at 0x100001648: file hello.adb, line 2.
Starting program: hello
Temporary breakpoint 1, _ada_hello () at hello.adb:2
2 procedure Hello is
(gdb) s
4 Ada.Text_IO.Put_Line ("Hello."); # <<<< It works, too.
(gdb) s
ada__text_io__put_line__2 (item=...) at a-textio.adb:1426
1426 a-textio.adb: No such file or directory.
(gdb) quit
A debugging session is active.
Inferior 1 [process 45793] will be killed.
Quit anyway? (y or n) y
>From gcc-bugs-return-522049-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 13 14:33:23 2016
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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++/70639] internal compiler error: in guard_tinfo_to_string, at c-family/c-indentation.c:560
Date: Wed, 13 Apr 2016 14:33:00 -0000
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--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
So I think rather this one:
--- a/gcc/c-family/c-indentation.c
+++ b/gcc/c-family/c-indentation.c
@@ -239,10 +239,11 @@ should_warn_for_misleading_indentation (const
token_indent_info &guard_tinfo,
if (line_table->seen_line_directive)
return false;
- /* We can't usefully warn about do-while statements since the bodies of
these
- statements are always explicitly delimited at both ends, so control flow
is
- quite obvious. */
- if (guard_tinfo.keyword == RID_DO)
+ /* We can't usefully warn about do-while and switch statements since the
+ bodies of these statements are always explicitly delimited at both ends,
+ so control flow is quite obvious. */
+ if (guard_tinfo.keyword == RID_DO
+ || guard_tinfo.keyword == RID_SWITCH)
return false;
/* If the token following the body is a close brace or an "else"
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From: "jason at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70615] [6 Regression] ICE on valid code at -O1 and above on x86_64-linux-gnu in add_expr, at tree.c:7870
Date: Wed, 13 Apr 2016 14:34:00 -0000
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--- Comment #4 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Wed Apr 13 14:33:53 2016
New Revision: 234940
URL: https://gcc.gnu.org/viewcvs?rev=234940&root=gcc&view=rev
Log:
PR c++/70615
* cp-gimplify.c (cp_genericize_r): Expand PTRMEM_CST here.
(cp_gimplify_expr): Not here.
Added:
trunk/gcc/testsuite/g++.dg/opt/ptrmem7.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/cp-gimplify.c
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70594] [6 Regression] -fcompare-debug failure
Date: Wed, 13 Apr 2016 14:46:00 -0000
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--- Comment #33 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Apr 13 14:45:46 2016
New Revision: 234942
URL: https://gcc.gnu.org/viewcvs?rev=234942&root=gcc&view=rev
Log:
PR c++/70594
* decl.c (pop_labels_1): Removed.
(note_label, sort_labels): New functions.
(pop_labels): During named_labels traversal, just push the slot
pointers into a vector, then qsort it by DECL_UID and only then
call pop_label and chain it into BLOCK_VARS.
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/decl.c
>From gcc-bugs-return-522052-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 13 15:03:07 2016
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From: "jason at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70634] [4.9/5/6 Regression] ICE on valid code on x86_64-linux-gnu: Segmentation fault (program cc1plus)
Date: Wed, 13 Apr 2016 15:03:00 -0000
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--- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Wed Apr 13 15:02:23 2016
New Revision: 234945
URL: https://gcc.gnu.org/viewcvs?rev=234945&root=gcc&view=rev
Log:
PR c++/70634
* pt.c (instantiation_dependent_uneval_expression_p): Split out
from instantiation_dependent_expression_p.
(value_dependent_expression_p): Use it for unevaluated operands.
(instantiation_dependent_r): Don't check value-dependence.
(instantiation_dependent_expression_p): Check
value-dependence of the expression as a whole.
* cp-tree.h: Declare instantiation_dependent_uneval_expression_p.
* semantics.c (finish_decltype_type): Use it.
Added:
trunk/gcc/testsuite/g++.dg/template/dependent-expr10.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/cp-tree.h
trunk/gcc/cp/pt.c
trunk/gcc/cp/semantics.c
>From gcc-bugs-return-522054-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 13 15:05:45 2016
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From: "jpoimboe at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/70646] New: Corrupt truncated function
Date: Wed, 13 Apr 2016 15:05:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70646
Bug ID: 70646
Summary: Corrupt truncated function
Product: gcc
Version: 5.3.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: jpoimboe at redhat dot com
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Created attachment 38255
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38255&action=edit
qla_attr.i.gz
The linux kernel has a new tool named "objtool" which follows all possible code
paths for every .o file, looking for abnormalities. In one rare case it has
discovered a corrupt truncated function.
From the disassembly of drivers/scsi/qla2xxx/qla_attr.o:
0000000000002f53 <qla2x00_get_host_fabric_name>:
2f53: 55 push %rbp
2f54: 48 89 e5 mov %rsp,%rbp
0000000000002f57 <qla2x00_get_fc_host_stats>:
2f57: 55 push %rbp
2f58: b9 e8 00 00 00 mov $0xe8,%ecx
2f5d: 48 89 e5 mov %rsp,%rbp
...
Note that qla2x00_get_host_fabric_name() is inexplicably truncated after
setting up the frame pointer. It falls through to the next function, which is
very bad.
I can recreate it with gcc 5.3.1 or gcc 6.0 on the upstream Linux kernel at tag
v4.6-rc3.
The call chain which appears to trigger the problem is:
qla2x00_get_host_fabric_name()
wwn_to_u64()
get_unaligned_be64()
be64_to_cpup()
__be64_to_cpup()
It occurs with the combination of the following two recent Linux commits:
- bc27fb68aaad ("include/uapi/linux/byteorder, swab: force inlining of some
byteswap operations")
- ef3fb2422ffe ("scsi: fc: use get/put_unaligned64 for wwn access")
The gzipped .i file is attached. I'll also attach the kernel .config file.
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Subject: [Bug fortran/67039] Documentation of pseudorandom number intrinsics is incorrect
Date: Wed, 13 Apr 2016 15:05:00 -0000
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--- Comment #8 from dominiq at gcc dot gnu.org ---
Author: dominiq
Date: Wed Apr 13 15:04:57 2016
New Revision: 234946
URL: https://gcc.gnu.org/viewcvs?rev=234946&root=gcc&view=rev
Log:
2016-04-13 Dominique d'Humieres <dominiq@lps.ens.fr>
PR fortran/67039
* intrinsic.texi: Correct the documentation of pseudorandom
number intrinsics.
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/intrinsic.texi
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Subject: [Bug c/70646] Corrupt truncated function
Date: Wed, 13 Apr 2016 15:06:00 -0000
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--- Comment #1 from Josh Poimboeuf <jpoimboe at redhat dot com> ---
Created attachment 38256
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38256&action=edit
Linux kernel config
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Subject: [Bug c/70646] Corrupt truncated function
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--- Comment #2 from Josh Poimboeuf <jpoimboe at redhat dot com> ---
$ gcc -Wp,-MD,drivers/scsi/qla2xxx/.qla_attr.o.d -nostdinc -isystem
/usr/lib/gcc/x86_64-redhat-linux/5.3.1/include -I./arch/x86/include
-Iarch/x86/include/generated/uapi -Iarch/x86/include/generated -Iinclude
-I./arch/x86/include/uapi -Iarch/x86/include/generated/uapi -I./include/uapi
-Iinclude/generated/uapi -include ./include/linux/kconfig.h -D__KERNEL__ -Wall
-Wundef -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common
-Werror-implicit-function-declaration -Wno-format-security -std=gnu89 -mno-sse
-mno-mmx -mno-sse2 -mno-3dnow -mno-avx -m64 -falign-jumps=1 -falign-loops=1
-mno-80387 -mno-fp-ret-in-387 -mpreferred-stack-boundary=3 -mskip-rax-setup
-mtune=generic -mno-red-zone -mcmodel=kernel -funit-at-a-time
-maccumulate-outgoing-args -DCONFIG_X86_X32_ABI -DCONFIG_AS_CFI=1
-DCONFIG_AS_CFI_SIGNAL_FRAME=1 -DCONFIG_AS_CFI_SECTIONS=1 -DCONFIG_AS_FXSAVEQ=1
-DCONFIG_AS_SSSE3=1 -DCONFIG_AS_CRC32=1 -DCONFIG_AS_AVX=1 -DCONFIG_AS_AVX2=1
-DCONFIG_AS_SHA1_NI=1 -DCONFIG_AS_SHA256_NI=1 -pipe -Wno-sign-compare
-fno-asynchronous-unwind-tables -fno-delete-null-pointer-checks -Os
-Wno-maybe-uninitialized --param=allow-store-data-races=0
-Wframe-larger-than=2048 -fno-stack-protector -Wno-unused-but-set-variable
-fno-omit-frame-pointer -fno-optimize-sibling-calls
-fno-var-tracking-assignments -fno-inline-functions-called-once
-Wdeclaration-after-statement -Wno-pointer-sign -fno-strict-overflow
-fconserve-stack -Werror=implicit-int -Werror=strict-prototypes
-Werror=date-time -Werror=incompatible-pointer-types -DCC_HAVE_ASM_GOTO
-D"KBUILD_STR(s)=#s" -D"KBUILD_BASENAME=KBUILD_STR(qla_attr)"
-D"KBUILD_MODNAME=KBUILD_STR(qla2xxx)" -c -o drivers/scsi/qla2xxx/qla_attr.o
drivers/scsi/qla2xxx/qla_attr.c
$ gcc -v
Using built-in specs.
COLLECT_GCC=/usr/bin/gcc
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-redhat-linux/5.3.1/lto-wrapper
Target: x86_64-redhat-linux
Configured with: ../configure --enable-bootstrap
--enable-languages=c,c++,objc,obj-c++,fortran,ada,go,lto --prefix=/usr
--mandir=/usr/share/man --infodir=/usr/share/info
--with-bugurl=http://bugzilla.redhat.com/bugzilla --enable-shared
--enable-threads=posix --enable-checking=release --enable-multilib
--with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions
--enable-gnu-unique-object --enable-linker-build-id
--with-linker-hash-style=gnu --enable-plugin --enable-initfini-array
--disable-libgcj --with-default-libstdcxx-abi=gcc4-compatible --with-isl
--enable-libmpx --enable-gnu-indirect-function --with-tune=generic
--with-arch_32=i686 --build=x86_64-redhat-linux
Thread model: posix
gcc version 5.3.1 20151207 (Red Hat 5.3.1-2) (GCC)
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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/67039] Documentation of pseudorandom number intrinsics is incorrect
Date: Wed, 13 Apr 2016 15:08:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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--- Comment #9 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Jerry,
Thanks for the review.
> I think this word should be singular.
> > +@code{RANDOM_SEED} to initialize the pseudo-random numbers <===== no 's'
Done, closing as FIXED.
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Subject: [Bug tree-optimization/70604] switch statement optimization creates dead code
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Josh Poimboeuf <jpoimboe at redhat dot com> changed:
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CC| |rguenth at gcc dot gnu.org
--- Comment #4 from Josh Poimboeuf <jpoimboe at redhat dot com> ---
Richard, just realized you weren't on CC for my response to your question.
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Subject: [Bug c++/70615] [6 Regression] ICE on valid code at -O1 and above on x86_64-linux-gnu in add_expr, at tree.c:7870
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Jason Merrill <jason at gcc dot gnu.org> changed:
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--- Comment #5 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug c++/58822] Segfault when calling make_shared
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--- Comment #30 from Michi Henning <michi at triodia dot com> ---
(In reply to Jonathan Wakely from comment #29)
> > make_shared<T>(args) doesn't always do the same thing as shared_ptr<T>(new
> > T(args))
>
> It does do effectively the same thing. The difference in behaviour is
> because when you use shared_ptr<T>(new T(this)) the implicit cast happens
> inside the class, and the compiler can resolve it without inspecting the
> stable.
Yes, I understand why it happens, and why the current behavior conforms to the
standard. It's just that, from an application programmer's point of view, this
is in the "ultra-unexpected category".
> It should be possible to add a warning for the case where the cast happens
> inside the class (which doesn't crash, but is still UB) but it won't be
> possible to warn for the other cases, because at the site of the implicit
> cast the compiler doesn't know whether the pointer refers to a constructed
> object or not. I've created PR 70644.
Most sterling, thank you!
Michi.
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Subject: [Bug c++/70594] [6 Regression] -fcompare-debug failure
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--- Comment #34 from Jason Merrill <jason at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #33)
> (pop_labels): During named_labels traversal, just push the slot
> pointers into a vector, then qsort it by DECL_UID and only then
> call pop_label and chain it into BLOCK_VARS.
Tobias, does this fix your testcase?
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Subject: [Bug testsuite/70150] Additonal test failures with --enable-default-pie
Date: Wed, 13 Apr 2016 15:36:00 -0000
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--- Comment #14 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to psturm from comment #13)
> (In reply to H.J. Lu from comment #12)
> > Patches are posted at
> >
> > https://gcc.gnu.org/ml/gcc-patches/2016-03/msg00929.html
> > https://gcc.gnu.org/ml/gcc-patches/2016-03/msg00995.html
>
> https://gcc.gnu.org/ml/gcc-patches/2016-03/msg00929.html patch does not
> apply because it appears it conflicts with another change made for HPPA:
Please try patches on hjl/pr70150 branch.
>From gcc-bugs-return-522063-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 13 15:39:37 2016
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Subject: [Bug c++/70627] [6 Regression] internal compiler error: verify_type failed
Date: Wed, 13 Apr 2016 15:39:00 -0000
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Jason Merrill <jason at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |jason at gcc dot gnu.org
>From gcc-bugs-return-522064-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 13 15:54:58 2016
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Subject: [Bug c++/70634] [4.9/5 Regression] ICE on valid code on x86_64-linux-gnu: Segmentation fault (program cc1plus)
Date: Wed, 13 Apr 2016 15:54:00 -0000
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Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[4.9/5/6 Regression] ICE on |[4.9/5 Regression] ICE on
|valid code on |valid code on
|x86_64-linux-gnu: |x86_64-linux-gnu:
|Segmentation fault (program |Segmentation fault (program
|cc1plus) |cc1plus)
--- Comment #4 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed for GCC 6 so far.
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Subject: [Bug c/70436] [4.9/5/6 Regression] -Wparentheses missing ambiguous else warning
Date: Wed, 13 Apr 2016 16:01:00 -0000
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--- Comment #16 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Wed Apr 13 16:00:52 2016
New Revision: 234949
URL: https://gcc.gnu.org/viewcvs?rev=234949&root=gcc&view=rev
Log:
PR c/70436
* c-parser.c (c_parser_statement_after_labels): Add IF_P argument and
adjust callers.
(c_parser_statement): Likewise.
(c_parser_c99_block_statement): Likewise.
(c_parser_while_statement): Likewise.
(c_parser_for_statement): Likewise.
(c_parser_if_body): Don't set IF_P here.
(c_parser_if_statement): Add IF_P argument. Set IF_P here. Warn
about dangling else here.
* c-tree.h (c_finish_if_stmt): Adjust declaration.
* c-typeck.c (c_finish_if_stmt): Remove NESTED_IF parameter. Don't
warn about dangling else here.
* testsuite/gcc.dg/Wparentheses-12.c: New test.
* testsuite/gcc.dg/Wparentheses-13.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/Wparentheses-12.c
trunk/gcc/testsuite/gcc.dg/Wparentheses-13.c
Modified:
trunk/gcc/c/ChangeLog
trunk/gcc/c/c-parser.c
trunk/gcc/c/c-tree.h
trunk/gcc/c/c-typeck.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c/70436] [4.9/5/6 Regression] -Wparentheses missing ambiguous else warning
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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--- Comment #17 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Should be fixed now.
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Subject: [Bug c++/70639] internal compiler error: in guard_tinfo_to_string, at c-family/c-indentation.c:560
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----------------------------------------------------------------------------
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Subject: [Bug c++/70639] internal compiler error: in guard_tinfo_to_string, at c-family/c-indentation.c:560
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--- Comment #5 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Wed Apr 13 16:28:46 2016
New Revision: 234952
URL: https://gcc.gnu.org/viewcvs?rev=234952&root=gcc&view=rev
Log:
PR c++/70639
* c-indentation.c (should_warn_for_misleading_indentation): Bail out
for switch statements, too.
* c-c++-common/Wmisleading-indentation-4.c: New test.
Added:
trunk/gcc/testsuite/c-c++-common/Wmisleading-indentation-4.c
Modified:
trunk/gcc/c-family/ChangeLog
trunk/gcc/c-family/c-indentation.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/70639] internal compiler error: in guard_tinfo_to_string, at c-family/c-indentation.c:560
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #6 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug rtl-optimization/70461] [6 Regression] Performance regression after r234527
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70461
Alexander Fomin <afomin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |CLOSED
--- Comment #6 from Alexander Fomin <afomin at gcc dot gnu.org> ---
Please consider my previous comment irrelevant.
I close this one, thanks.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70635] [4.9/5/6 Regression] ICE on (and rejects) valid code on x86_64-linux-gnu: Segmentation fault (program cc1plus)
Date: Wed, 13 Apr 2016 17:11:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70635
--- Comment #4 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> ---
Author: paolo
Date: Wed Apr 13 17:11:03 2016
New Revision: 234953
URL: https://gcc.gnu.org/viewcvs?rev=234953&root=gcc&view=rev
Log:
/cp
2016-04-13 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/70635
* pt.c (resolve_typename_type): Fix typos in infinite recursion
avoidance mechanism.
/testsuite
2016-04-13 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/70635
* g++.dg/parse/pr70635.C: New.
Added:
trunk/gcc/testsuite/g++.dg/parse/pr70635.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/pt.c
trunk/gcc/testsuite/ChangeLog
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From: "paolo.carlini at oracle dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70635] [4.9/5 Regression] ICE on (and rejects) valid code on x86_64-linux-gnu: Segmentation fault (program cc1plus)
Date: Wed, 13 Apr 2016 17:12:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[4.9/5/6 Regression] ICE on |[4.9/5 Regression] ICE on
|(and rejects) valid code on |(and rejects) valid code on
|x86_64-linux-gnu: |x86_64-linux-gnu:
|Segmentation fault (program |Segmentation fault (program
|cc1plus) |cc1plus)
--- Comment #5 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Fixed in trunk so far.
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Subject: [Bug bootstrap/70173] make distclean: leaves stage_final and libcc1/compiler-name.h
Date: Wed, 13 Apr 2016 18:02:00 -0000
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--- Comment #7 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Author: segher
Date: Wed Apr 13 18:02:08 2016
New Revision: 234954
URL: https://gcc.gnu.org/viewcvs?rev=234954&root=gcc&view=rev
Log:
Make distclean clean up more (PR70173)
Currently, distclean does not remove the libcc1, gnattools, and gotools
directories, and not the stage_final file either. Fix that.
PR bootstrap/70173
* Makefile.tpl (local-distclean): Delete the libcc1, gnattools,
and gotools directories. Delete the stage_final file.
* Makefile.in: Regenerate.
Modified:
trunk/ChangeLog
trunk/Makefile.in
trunk/Makefile.tpl
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Subject: [Bug target/65344] Exception is not catched on AIX - class with more ancestors, virtual method throws
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Miroslav Jezbera <jezz at hkfree dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Version|4.8.3 |5.3.1
--- Comment #1 from Miroslav Jezbera <jezz at hkfree dot org> ---
Reproduced also in version 5.3.1.
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Subject: [Bug rtl-optimization/68749] FAIL: gcc.dg/ifcvt-4.c scan-rtl-dump ce1 "2 true changes made"
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--- Comment #8 from Rainer Orth <ro at gcc dot gnu.org> ---
Author: ro
Date: Wed Apr 13 18:13:31 2016
New Revision: 234955
URL: https://gcc.gnu.org/viewcvs?rev=234955&root=gcc&view=rev
Log:
Fix gcc.dg/ifcvt-4.c on 64-bit SPARC (PR rtl-optimization/68749)
PR rtl-optimization/68749
* gcc.dg/ifcvt-4.c: Use "word_mode" rather than "int" to limit the
effects of argument promotions.
Remove default args to dg-skip-if.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/ifcvt-4.c
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Subject: [Bug rtl-optimization/68749] FAIL: gcc.dg/ifcvt-4.c scan-rtl-dump ce1 "2 true changes made"
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--- Comment #9 from Rainer Orth <ro at gcc dot gnu.org> ---
SPARC V9 part fixed for 6.1.
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Subject: [Bug c++/70627] [6 Regression] internal compiler error: verify_type failed
Date: Wed, 13 Apr 2016 18:32:00 -0000
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--- Comment #8 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Wed Apr 13 18:32:11 2016
New Revision: 234956
URL: https://gcc.gnu.org/viewcvs?rev=234956&root=gcc&view=rev
Log:
PR c++/70627
* decl.c (start_enum): Don't change an existing ENUM_UNDERLYING_TYPE.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/enum_base3.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/decl.c
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Subject: [Bug c++/70627] [6 Regression] internal compiler error: verify_type failed
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Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #9 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug target/70568] [4.9/5/6 regression] PowerPC64: union of floating and fixed doesn't use POWER8 GPR/VSR moves
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acsawdey at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |vmakarov at gcc dot gnu.org
Summary|PowerPC64: union of |[4.9/5/6 regression]
|floating and fixed doesn't |PowerPC64: union of
|use POWER8 GPR/VSR moves |floating and fixed doesn't
| |use POWER8 GPR/VSR moves
--- Comment #3 from acsawdey at gcc dot gnu.org ---
Tracked this back to 210824, and in particular this change:
@@ -860,10 +897,15 @@
}
}
- /* If the alternative actually allows memory, make
- things a bit cheaper since we won't need an extra
- insn to load it. */
- if (op_class != NO_REGS)
+ if (op_class == NO_REGS)
+ /* Although we don't need insn to reload from
+ memory, still accessing memory is usually more
+ expensive than a register. */
+ pp->mem_cost = frequency;
+ else
+ /* If the alternative actually allows memory, make
+ things a bit cheaper since we won't need an
+ extra insn to load it. */
pp->mem_cost
= ((out_p ? ira_memory_move_cost[mode][op_class][0] : 0)
+ (in_p ? ira_memory_move_cost[mode][op_class][1] : 0)
Without this change, you get this from IRA costs:
a0 (r157,l0) best GENERAL_REGS, allocno GENERAL_REGS
a0(r157,l0) costs: BASE_REGS:4000,4000 GENERAL_REGS:4000,4000
LINK_REGS:16000,16000 CTR_REGS:16000,16000 LINK_OR_CTR_REGS:16000,16000
SPEC_OR_GEN_REGS:16000,16000 MEM:4000,4000
and we pick the pattern for xscvdpspn.
With the change, you get
a0 (r157,l0) best NO_REGS, allocno NO_REGS
a0(r157,l0) costs: BASE_REGS:3000,3000 GENERAL_REGS:3000,3000
LINK_REGS:15000,15000 CTR_REGS:15000,15000 LINK_OR_CTR_REGS:15000,15000
SPEC_OR_GEN_REGS:15000,15000 MEM:2000,2000
And this gets done via memory instead of the register moves.
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Subject: [Bug testsuite/68242] FAIL: libgomp.oacc-c-c++-common/reduction-2.c, and other OpenACC reduction test case "oddities"
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--- Comment #7 from cesar at gcc dot gnu.org ---
Author: cesar
Date: Wed Apr 13 18:54:41 2016
New Revision: 234957
URL: https://gcc.gnu.org/viewcvs?rev=234957&root=gcc&view=rev
Log:
libgomp/
PR testsuite/68242
* testsuite/libgomp.oacc-c-c++-common/reduction-1.c: Adjust test.
* testsuite/libgomp.oacc-c-c++-common/reduction-2.c: Likewise.
Modified:
trunk/libgomp/ChangeLog
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-2.c
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cesar at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #8 from cesar at gcc dot gnu.org ---
Fixed in r234957.
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Subject: [Bug c/70646] Corrupt truncated function
Date: Wed, 13 Apr 2016 19:14:00 -0000
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Denis Vlasenko <vda.linux at googlemail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |vda.linux at googlemail dot com
--- Comment #3 from Denis Vlasenko <vda.linux at googlemail dot com> ---
I can reproduce it with:
$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-redhat-linux/5.3.1/lto-wrapper
Target: x86_64-redhat-linux
Configured with: ../configure --enable-bootstrap
--enable-languages=c,c++,objc,obj-c++,fortran,ada,go,lto --prefix=/usr
--mandir=/usr/share/man --infodir=/usr/share/info
--with-bugurl=http://bugzilla.redhat.com/bugzilla --enable-shared
--enable-threads=posix --enable-checking=release --enable-multilib
--with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions
--enable-gnu-unique-object --enable-linker-build-id
--with-linker-hash-style=gnu --enable-plugin --enable-initfini-array
--disable-libgcj --with-isl --enable-libmpx --enable-gnu-indirect-function
--with-tune=generic --with-arch_32=i686 --build=x86_64-redhat-linux
Thread model: posix
gcc version 5.3.1 20160406 (Red Hat 5.3.1-6) (GCC)
No fancy compiler flags are necessary to thigger it.
Without "-fno-omit-frame-pointer", function loses its two remaining insns, I
see an empty body:
.type qla2x00_get_host_fabric_name, @function
qla2x00_get_host_fabric_name:
.LFB4504:
.cfi_startproc
.cfi_endproc
.LFE4504:
.size qla2x00_get_host_fabric_name, .-qla2x00_get_host_fabric_name
Simple "gcc -Os qla_attr.i.c -S" would do.
gcc -O2 produces a normally-looking function.
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Subject: [Bug c/70646] Corrupt truncated function
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--- Comment #4 from Denis Vlasenko <vda.linux at googlemail dot com> ---
Shorter reproducer:
typedef __signed__ char __s8;
typedef unsigned char __u8;
typedef __signed__ short __s16;
typedef unsigned short __u16;
typedef __signed__ int __s32;
typedef unsigned int __u32;
__extension__ typedef __signed__ long long __s64;
__extension__ typedef unsigned long long __u64;
typedef signed char s8;
typedef unsigned char u8;
typedef signed short s16;
typedef unsigned short u16;
typedef signed int s32;
typedef unsigned int u32;
typedef signed long long s64;
typedef unsigned long long u64;
typedef __u64 __be64;
static inline __attribute__((no_instrument_function))
__attribute__((__const__)) __u64 __fswab64(__u64 val)
{
return __builtin_bswap64(val);
}
static inline __attribute__((no_instrument_function))
__attribute__((always_inline)) __u64 __swab64p(const __u64 *p)
{
return (__builtin_constant_p((__u64)(*p)) ? ((__u64)( (((__u64)(*p) &
(__u64)0x00000000000000ffULL) << 56) | (((__u64)(*p) &
(__u64)0x000000000000ff00ULL) << 40) | (((__u64)(*p) &
(__u64)0x0000000000ff0000ULL) << 24) | (((__u64)(*p) &
(__u64)0x00000000ff000000ULL) << 8) | (((__u64)(*p) &
(__u64)0x000000ff00000000ULL) >> 8) | (((__u64)(*p) &
(__u64)0x0000ff0000000000ULL) >> 24) | (((__u64)(*p) &
(__u64)0x00ff000000000000ULL) >> 40) | (((__u64)(*p) &
(__u64)0xff00000000000000ULL) >> 56))) : __fswab64(*p));
}
static inline __attribute__((no_instrument_function))
__attribute__((always_inline)) __u64 __be64_to_cpup(const __be64 *p)
{
return __swab64p((__u64 *)p);
}
static inline __attribute__((no_instrument_function))
__attribute__((always_inline)) u64 get_unaligned_be64(const void *p)
{
return __be64_to_cpup((__be64 *)p);
}
static inline __attribute__((no_instrument_function)) u64 wwn_to_u64(u8 *wwn)
{
return get_unaligned_be64(wwn);
}
struct Scsi_Host {
unsigned long base;
unsigned long io_port;
unsigned char n_io_port;
unsigned char dma_channel;
unsigned int irq;
void *shost_data;
unsigned long hostdata[0]
__attribute__ ((aligned (sizeof(unsigned long))));
};
static inline __attribute__((no_instrument_function)) void *shost_priv(struct
Scsi_Host *shost)
{
return (void *)shost->hostdata;
}
typedef struct scsi_qla_host {
u8 fabric_node_name[8];
u32 device_flags;
} scsi_qla_host_t;
struct fc_host_attrs {
u64 node_name;
u64 port_name;
u64 permanent_port_name;
u32 supported_classes;
u8 supported_fc4s[32];
u32 supported_speeds;
u32 maxframe_size;
u16 max_npiv_vports;
char serial_number[80];
char manufacturer[80];
char model[256];
char model_description[256];
char hardware_version[64];
char driver_version[64];
char firmware_version[64];
char optionrom_version[64];
u32 port_id;
u8 active_fc4s[32];
u32 speed;
u64 fabric_name;
};
static void
qla2x00_get_host_fabric_name(struct Scsi_Host *shost)
{
scsi_qla_host_t *vha = shost_priv(shost);
u8 node_name[8] = { 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF};
u64 fabric_name = wwn_to_u64(node_name);
if (vha->device_flags & 0x1)
fabric_name = wwn_to_u64(vha->fabric_node_name);
(((struct fc_host_attrs *)(shost)->shost_data)->fabric_name) = fabric_name;
}
void *get_host_fabric_name = qla2x00_get_host_fabric_name;
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Subject: [Bug c/70646] Corrupt truncated function
Date: Wed, 13 Apr 2016 19:46:00 -0000
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--- Comment #5 from Denis Vlasenko <vda.linux at googlemail dot com> ---
Even smaller reproducer.
Bug disappears if "__attribute__((always_inline))" is removed everywhere.
typedef unsigned char u8;
typedef unsigned int u32;
typedef unsigned long long u64;
static inline __attribute__((__const__)) u64 __fswab64(u64 val)
{
return __builtin_bswap64(val);
}
static inline __attribute__((always_inline)) u64 __swab64p(const u64 *p)
{
return (__builtin_constant_p((u64)(*p)) ? ((u64)( (((u64)(*p) &
(u64)0x00000000000000ffULL) << 56) | (((u64)(*p) & (u64)0x000000000000ff00ULL)
<< 40) | (((u64)(*p) & (u64)0x0000000000ff0000ULL) << 24) | (((u64)(*p) &
(u64)0x00000000ff000000ULL) << 8) | (((u64)(*p) & (u64)0x000000ff00000000ULL)
>> 8) | (((u64)(*p) & (u64)0x0000ff0000000000ULL) >> 24) | (((u64)(*p) &
(u64)0x00ff000000000000ULL) >> 40) | (((u64)(*p) & (u64)0xff00000000000000ULL)
>> 56))) : __fswab64(*p));
}
static inline __attribute__((always_inline)) u64 __be64_to_cpup(const u64 *p)
{
return __swab64p((u64 *)p);
}
static inline __attribute__((always_inline)) u64 get_unaligned_be64(const void
*p)
{
return __be64_to_cpup((u64 *)p);
}
static inline u64 wwn_to_u64(u8 *wwn)
{
return get_unaligned_be64(wwn);
}
struct Scsi_Host {
void *shost_data;
unsigned long hostdata[0];
};
static inline void *shost_priv(struct Scsi_Host *shost)
{
return (void *)shost->hostdata;
}
typedef struct scsi_qla_host {
u8 fabric_node_name[8];
u32 device_flags;
} scsi_qla_host_t;
struct fc_host_attrs {
u64 fabric_name;
};
static void
qla2x00_get_host_fabric_name(struct Scsi_Host *shost)
{
scsi_qla_host_t *vha = shost_priv(shost);
u8 node_name[8] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
u64 fabric_name = wwn_to_u64(node_name);
if (vha->device_flags & 0x1)
fabric_name = wwn_to_u64(vha->fabric_node_name);
(((struct fc_host_attrs *)(shost)->shost_data)->fabric_name) = fabric_name;
}
void *get_host_fabric_name = qla2x00_get_host_fabric_name;
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Subject: [Bug c/70646] Corrupt truncated function
Date: Wed, 13 Apr 2016 19:58:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70646
--- Comment #6 from Denis Vlasenko <vda.linux at googlemail dot com> ---
I can collapse the chain of inlines down to this and still see the bug.
Removing "__attribute__((always_inline))", or merging __swab64p() and
wwn_to_u64(), makes bug disappear.
typedef unsigned char u8;
typedef unsigned int u32;
typedef unsigned long long u64;
static inline __attribute__((always_inline)) u64 __swab64p(const u64 *p)
{
return (__builtin_constant_p((u64)(*p)) ? ((u64)( (((u64)(*p) &
(u64)0x00000000000000ffULL) << 56) | (((u64)(*p) & (u64)0x000000000000ff00ULL)
<< 40) | (((u64)(*p) & (u64)0x0000000000ff0000ULL) << 24) | (((u64)(*p) &
(u64)0x00000000ff000000ULL) << 8) | (((u64)(*p) & (u64)0x000000ff00000000ULL)
>> 8) | (((u64)(*p) & (u64)0x0000ff0000000000ULL) >> 24) | (((u64)(*p) &
(u64)0x00ff000000000000ULL) >> 40) | (((u64)(*p) & (u64)0xff00000000000000ULL)
>> 56))) : __builtin_bswap64(*p));
}
static inline u64 wwn_to_u64(void *wwn)
{
return __swab64p(wwn);
}
struct Scsi_Host {
void *shost_data;
unsigned long hostdata[0];
};
static inline void *shost_priv(struct Scsi_Host *shost)
{
return (void *)shost->hostdata;
}
typedef struct scsi_qla_host {
u8 fabric_node_name[8];
u32 device_flags;
} scsi_qla_host_t;
struct fc_host_attrs {
u64 fabric_name;
};
static void
qla2x00_get_host_fabric_name(struct Scsi_Host *shost)
{
scsi_qla_host_t *vha = shost_priv(shost);
u8 node_name[8] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
u64 fabric_name = wwn_to_u64(node_name);
if (vha->device_flags & 0x1)
fabric_name = wwn_to_u64(vha->fabric_node_name);
(((struct fc_host_attrs *)(shost)->shost_data)->fabric_name) = fabric_name;
}
void *get_host_fabric_name = qla2x00_get_host_fabric_name;
>From gcc-bugs-return-522086-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 13 20:24:48 2016
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From: "matt at godbolt dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70647] New: Feature request: warning for self-moving in constructors
Date: Wed, 13 Apr 2016 20:24:00 -0000
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Bug ID: 70647
Summary: Feature request: warning for self-moving in
constructors
Product: gcc
Version: unknown
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Consider the following code:
#include <utility> // for std::move
struct A {
int a; int b;
A(A &&o)
: a(a), // I get a warning here...
b(o.b) {}
};
struct B {
int a; int b;
B(B &&o)
: a(std::move(a)), // but sadly not here
b(std::move(o.b)) {}
};
[ c.f https://godbolt.org/g/v7zPYL ]
In the non-moving case, I get a warning that I've typoed and assigned a with
itself.
In the move case, there's no such warning. I appreciate this is probably
difficult (if not impossible) to detect, but if there's any way it can be done,
it would save a painful debugging session or two!
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Subject: [Bug c++/70594] [6 Regression] -fcompare-debug failure
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--- Comment #35 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Apr 13 20:35:59 2016
New Revision: 234961
URL: https://gcc.gnu.org/viewcvs?rev=234961&root=gcc&view=rev
Log:
PR c++/70594
* tree-sra.c (create_access_replacement,
get_replaced_param_substitute): Set DECL_NAMELESS on repl if it
gets fancy name.
* tree-pretty-print.c (dump_fancy_name): New function.
(dump_decl_name, dump_generic_node): Use it.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree-pretty-print.c
trunk/gcc/tree-sra.c
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Subject: [Bug c++/70641] [5/6 Regression] ICE on valid code at -O1 and above on x86_64-linux-gnu: verify_gimple failed
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Apr 13 20:43:10 2016
New Revision: 234962
URL: https://gcc.gnu.org/viewcvs?rev=234962&root=gcc&view=rev
Log:
PR c++/70641
* ipa-pure-const.c (pass_nothrow::execute): Call maybe_clean_eh_stmt
on all recursive call stmts. Return TODO_cleanup_cfg if any dead
eh edges have been purged.
* g++.dg/opt/pr70641.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/opt/pr70641.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/ipa-pure-const.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-522090-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 13 20:44:55 2016
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Subject: [Bug c++/70641] [5 Regression] ICE on valid code at -O1 and above on x86_64-linux-gnu: verify_gimple failed
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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
Summary|[5/6 Regression] ICE on |[5 Regression] ICE on valid
|valid code at -O1 and above |code at -O1 and above on
|on x86_64-linux-gnu: |x86_64-linux-gnu:
|verify_gimple failed |verify_gimple failed
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Should be fixed on the trunk so far.
>From gcc-bugs-return-522089-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 13 20:44:13 2016
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Subject: [Bug c++/70594] [6 Regression] -fcompare-debug failure
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--- Comment #36 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Tobias said he still sees some -fcompare-debug issue even with both of these
patches, so not closing this yet.
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Subject: [Bug c++/70648] New: [6 Regression] adplug-xmms fails to compile
Date: Wed, 13 Apr 2016 22:05:00 -0000
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Bug ID: 70648
Summary: [6 Regression] adplug-xmms fails to compile
Product: gcc
Version: 6.0
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template <class T, class V> struct C
{
template <class... U>
constexpr C (...) : c { static_cast<U &&>(0)... } {}
constexpr const V &operator[](T) { return c[0]; }
V c[T::F];
};
enum D { E, F };
struct A
{
struct G
{
typedef int *H;
int g, h;
C<D, H> i;
constexpr G () : g (), h (), i{} {}
constexpr G foo (H) { return G (0, 0, 0, 0, i[E]); }
constexpr G (int, int, H, H, H) : g (), h (), i{} {}
};
};
struct B : A
{
static constexpr auto b = G ().foo (0);
};
fails to compile with -std=c++11, starting with r234013. No idea whether the
error is valid or not, and perhaps the reduced testcase also doesn't exactly
match the original, I've been reducing on accepted by r234009, rejected by
r234013.
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Subject: [Bug c++/70648] [6 Regression] adplug-xmms fails to compile
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Target Milestone|--- |6.0
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From: "manu at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/19808] miss a warning about uninitialized member usage in member initializer list in constructor
Date: Wed, 13 Apr 2016 22:10:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=19808
Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |matt at godbolt dot org
--- Comment #30 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
*** Bug 70647 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-522094-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 13 22:10:05 2016
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From: "manu at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70647] Feature request: warning for self-moving in constructors
Date: Wed, 13 Apr 2016 22:10:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70647
Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |manu at gcc dot gnu.org
Resolution|--- |DUPLICATE
--- Comment #1 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
(In reply to Matt Godbolt from comment #0)
> In the move case, there's no such warning. I appreciate this is probably
> difficult (if not impossible) to detect, but if there's any way it can be
> done, it would save a painful debugging session or two!
I don't think "move" has anything to do with this. If you use "a + 1" or
"foo(a)", you are still initializing "a" with an uninitialized value.
In that sense, this is what PR19808 is about, for which there is a patch but,
sadly, nobody has had so far the time or interest to finish it and properly
submit it.
*** This bug has been marked as a duplicate of bug 19808 ***
>From gcc-bugs-return-522095-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 13 22:23:44 2016
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From: "mednafen at sent dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/70646] Corrupt truncated function
Date: Wed, 13 Apr 2016 22:23:00 -0000
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mednafen at sent dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mednafen at sent dot com
--- Comment #7 from mednafen at sent dot com ---
Following code aborts on x86_64 4.9.2 and 5.3.0 at -O2, at least:
#pragma GCC optimize("no-unit-at-a-time")
typedef unsigned char u8;
typedef unsigned long long u64;
static inline __attribute__((always_inline)) u64 __swab64p(const u64 *p)
{
return (__builtin_constant_p((u64)(*p)) ? ((u64)( (((u64)(*p) &
(u64)0x00000000000000ffULL) << 56) | (((u64)(*p) & (u64)0x000000000000ff00ULL)
<< 40) | (((u64)(*p) & (u64)0x0000000000ff0000ULL) << 24) | (((u64)(*p) &
(u64)0x00000000ff000000ULL) << 8) | (((u64)(*p) & (u64)0x000000ff00000000ULL)
>> 8) | (((u64)(*p) & (u64)0x0000ff0000000000ULL) >> 24) | (((u64)(*p) &
(u64)0x00ff000000000000ULL) >> 40) | (((u64)(*p) & (u64)0xff00000000000000ULL)
>> 56))) : __builtin_bswap64(*p));
}
static inline u64 wwn_to_u64(void *wwn)
{
return __swab64p(wwn);
}
void __attribute__((noinline,noclone)) broken(u64* shost)
{
u8 node_name[8] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
*shost = wwn_to_u64(node_name);
}
void __attribute__((noinline,noclone)) dummy(void)
{
__builtin_abort();
}
int main(int argc, char* argv[])
{
u64 v;
broken(&v);
if(v != (u64)-1)
__builtin_abort();
return 0;
}
>From gcc-bugs-return-522096-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 13 23:08:05 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70640] IEEE 128-bit floating point negative/abs has two thinkos
Date: Wed, 13 Apr 2016 23:08:00 -0000
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Michael Meissner <meissner at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Resolution|FIXED |---
--- Comment #3 from Michael Meissner <meissner at gcc dot gnu.org> ---
Test pr70640 fails on power7 system without power8 assembler.
>From gcc-bugs-return-522098-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 13 23:27:30 2016
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Subject: [Bug c++/69517] [5/6 regression] SEGV on a VLA with excess initializer elements
Date: Wed, 13 Apr 2016 23:27:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69517
--- Comment #9 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Wed Apr 13 23:26:41 2016
New Revision: 234966
URL: https://gcc.gnu.org/viewcvs?rev=234966&root=gcc&view=rev
Log:
PR c++/69517 - [5/6 regression] SEGV on a VLA with excess initializer elements
PR c++/70019 - VLA size overflow not detected
PR c++/70588 - SIGBUS on a VLA larger than SIZE_MAX / 2
gcc/testsuite/ChangeLog:
2016-04-13 Martin Sebor <msebor@redhat.com>
PR c++/69517
PR c++/70019
PR c++/70588
* c-c++-common/ubsan/vla-1.c (main): Catch exceptions.
* g++.dg/cpp1y/vla11.C: New test.
* g++.dg/cpp1y/vla12.C: New test.
* g++.dg/cpp1y/vla13.C: New test.
* g++.dg/cpp1y/vla14.C: New test.
* g++.dg/cpp1y/vla3.C: Restore deleted test.
* gcc/testsuite/g++.dg/init/array24.C: Fully brace VLA initializer.
* g++.dg/ubsan/vla-1.C: Disable exceptions.
gcc/cp/ChangeLog:
2016-04-13 Martin Sebor <msebor@redhat.com>
PR c++/69517
PR c++/70019
PR c++/70588
* cp-tree.h (throw_bad_array_length, build_vla_check): Declare new
functions.
* decl.c (check_initializer, cp_finish_decl): Call them.
(reshape_init_r): Reject incompletely braced intializer-lists
for VLAs.
* init.c (throw_bad_array_length, build_vla_check)
(build_vla_size_check, build_vla_init_check): Define new functions.
* typeck2.c (split_nonconstant_init_1): Use variably_modified_type_p()
to detect a VLA.
(store_init_value): Same.
gcc/doc/ChangeLog:
2016-04-13 Martin Sebor <msebor@redhat.com>
PR c++/69517
PR c++/70019
PR c++/70588
* extend.texi (Variable Length): Document C++ specifics.
libstdc++-v3/ChangeLog:
2016-04-13 Martin Sebor <msebor@redhat.com>
PR c++/69517
* testsuite/25_algorithms/rotate/moveable2.cc: Make sure VLA
upper bound is positive.
Added:
trunk/gcc/testsuite/g++.dg/cpp1y/vla11.C
trunk/gcc/testsuite/g++.dg/cpp1y/vla12.C
trunk/gcc/testsuite/g++.dg/cpp1y/vla13.C
trunk/gcc/testsuite/g++.dg/cpp1y/vla14.C
trunk/gcc/testsuite/g++.dg/cpp1y/vla3.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/cp-tree.h
trunk/gcc/cp/decl.c
trunk/gcc/cp/init.c
trunk/gcc/cp/typeck2.c
trunk/gcc/doc/extend.texi
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/c-c++-common/ubsan/vla-1.c
trunk/gcc/testsuite/g++.dg/init/array24.C
trunk/gcc/testsuite/g++.dg/ubsan/vla-1.C
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/testsuite/25_algorithms/rotate/moveable2.cc
>From gcc-bugs-return-522097-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 13 23:27:29 2016
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Subject: [Bug c++/70019] VLA size overflow not detected
Date: Wed, 13 Apr 2016 23:27:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70019
--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Wed Apr 13 23:26:41 2016
New Revision: 234966
URL: https://gcc.gnu.org/viewcvs?rev=234966&root=gcc&view=rev
Log:
PR c++/69517 - [5/6 regression] SEGV on a VLA with excess initializer elements
PR c++/70019 - VLA size overflow not detected
PR c++/70588 - SIGBUS on a VLA larger than SIZE_MAX / 2
gcc/testsuite/ChangeLog:
2016-04-13 Martin Sebor <msebor@redhat.com>
PR c++/69517
PR c++/70019
PR c++/70588
* c-c++-common/ubsan/vla-1.c (main): Catch exceptions.
* g++.dg/cpp1y/vla11.C: New test.
* g++.dg/cpp1y/vla12.C: New test.
* g++.dg/cpp1y/vla13.C: New test.
* g++.dg/cpp1y/vla14.C: New test.
* g++.dg/cpp1y/vla3.C: Restore deleted test.
* gcc/testsuite/g++.dg/init/array24.C: Fully brace VLA initializer.
* g++.dg/ubsan/vla-1.C: Disable exceptions.
gcc/cp/ChangeLog:
2016-04-13 Martin Sebor <msebor@redhat.com>
PR c++/69517
PR c++/70019
PR c++/70588
* cp-tree.h (throw_bad_array_length, build_vla_check): Declare new
functions.
* decl.c (check_initializer, cp_finish_decl): Call them.
(reshape_init_r): Reject incompletely braced intializer-lists
for VLAs.
* init.c (throw_bad_array_length, build_vla_check)
(build_vla_size_check, build_vla_init_check): Define new functions.
* typeck2.c (split_nonconstant_init_1): Use variably_modified_type_p()
to detect a VLA.
(store_init_value): Same.
gcc/doc/ChangeLog:
2016-04-13 Martin Sebor <msebor@redhat.com>
PR c++/69517
PR c++/70019
PR c++/70588
* extend.texi (Variable Length): Document C++ specifics.
libstdc++-v3/ChangeLog:
2016-04-13 Martin Sebor <msebor@redhat.com>
PR c++/69517
* testsuite/25_algorithms/rotate/moveable2.cc: Make sure VLA
upper bound is positive.
Added:
trunk/gcc/testsuite/g++.dg/cpp1y/vla11.C
trunk/gcc/testsuite/g++.dg/cpp1y/vla12.C
trunk/gcc/testsuite/g++.dg/cpp1y/vla13.C
trunk/gcc/testsuite/g++.dg/cpp1y/vla14.C
trunk/gcc/testsuite/g++.dg/cpp1y/vla3.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/cp-tree.h
trunk/gcc/cp/decl.c
trunk/gcc/cp/init.c
trunk/gcc/cp/typeck2.c
trunk/gcc/doc/extend.texi
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/c-c++-common/ubsan/vla-1.c
trunk/gcc/testsuite/g++.dg/init/array24.C
trunk/gcc/testsuite/g++.dg/ubsan/vla-1.C
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/testsuite/25_algorithms/rotate/moveable2.cc
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Subject: [Bug c++/70588] SIGBUS on a VLA larger than SIZE_MAX / 2
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70588
--- Comment #7 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Wed Apr 13 23:26:41 2016
New Revision: 234966
URL: https://gcc.gnu.org/viewcvs?rev=234966&root=gcc&view=rev
Log:
PR c++/69517 - [5/6 regression] SEGV on a VLA with excess initializer elements
PR c++/70019 - VLA size overflow not detected
PR c++/70588 - SIGBUS on a VLA larger than SIZE_MAX / 2
gcc/testsuite/ChangeLog:
2016-04-13 Martin Sebor <msebor@redhat.com>
PR c++/69517
PR c++/70019
PR c++/70588
* c-c++-common/ubsan/vla-1.c (main): Catch exceptions.
* g++.dg/cpp1y/vla11.C: New test.
* g++.dg/cpp1y/vla12.C: New test.
* g++.dg/cpp1y/vla13.C: New test.
* g++.dg/cpp1y/vla14.C: New test.
* g++.dg/cpp1y/vla3.C: Restore deleted test.
* gcc/testsuite/g++.dg/init/array24.C: Fully brace VLA initializer.
* g++.dg/ubsan/vla-1.C: Disable exceptions.
gcc/cp/ChangeLog:
2016-04-13 Martin Sebor <msebor@redhat.com>
PR c++/69517
PR c++/70019
PR c++/70588
* cp-tree.h (throw_bad_array_length, build_vla_check): Declare new
functions.
* decl.c (check_initializer, cp_finish_decl): Call them.
(reshape_init_r): Reject incompletely braced intializer-lists
for VLAs.
* init.c (throw_bad_array_length, build_vla_check)
(build_vla_size_check, build_vla_init_check): Define new functions.
* typeck2.c (split_nonconstant_init_1): Use variably_modified_type_p()
to detect a VLA.
(store_init_value): Same.
gcc/doc/ChangeLog:
2016-04-13 Martin Sebor <msebor@redhat.com>
PR c++/69517
PR c++/70019
PR c++/70588
* extend.texi (Variable Length): Document C++ specifics.
libstdc++-v3/ChangeLog:
2016-04-13 Martin Sebor <msebor@redhat.com>
PR c++/69517
* testsuite/25_algorithms/rotate/moveable2.cc: Make sure VLA
upper bound is positive.
Added:
trunk/gcc/testsuite/g++.dg/cpp1y/vla11.C
trunk/gcc/testsuite/g++.dg/cpp1y/vla12.C
trunk/gcc/testsuite/g++.dg/cpp1y/vla13.C
trunk/gcc/testsuite/g++.dg/cpp1y/vla14.C
trunk/gcc/testsuite/g++.dg/cpp1y/vla3.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/cp-tree.h
trunk/gcc/cp/decl.c
trunk/gcc/cp/init.c
trunk/gcc/cp/typeck2.c
trunk/gcc/doc/extend.texi
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/c-c++-common/ubsan/vla-1.c
trunk/gcc/testsuite/g++.dg/init/array24.C
trunk/gcc/testsuite/g++.dg/ubsan/vla-1.C
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/testsuite/25_algorithms/rotate/moveable2.cc
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Subject: [Bug c++/69517] [5 regression] SEGV on a VLA with excess initializer elements
Date: Wed, 13 Apr 2016 23:44:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |4.9.3, 6.0
Summary|[5/6 regression] SEGV on a |[5 regression] SEGV on a
|VLA with excess initializer |VLA with excess initializer
|elements |elements
Known to fail|6.0 |
--- Comment #10 from Martin Sebor <msebor at gcc dot gnu.org> ---
Fixed in 6.0 by r234966.
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Subject: [Bug c++/16994] [meta-bug] VLA and C++
Date: Wed, 13 Apr 2016 23:45:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=16994
Bug 16994 depends on bug 70019, which changed state.
Bug 70019 Summary: VLA size overflow not detected
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70019
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
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Subject: [Bug c++/70019] VLA size overflow not detected
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |6.0
Resolution|--- |FIXED
Target Milestone|--- |6.0
Known to fail| |5.3.0
--- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
Fixed in 6.0 by r234966.
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Subject: [Bug c++/70588] SIGBUS on a VLA larger than SIZE_MAX / 2
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |6.0
Resolution|--- |FIXED
Target Milestone|--- |6.0
Known to fail|6.0 |
--- Comment #8 from Martin Sebor <msebor at gcc dot gnu.org> ---
Fixed in 6.0 by r234966.
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Subject: [Bug c++/16994] [meta-bug] VLA and C++
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Bug 16994 depends on bug 70588, which changed state.
Bug 70588 Summary: SIGBUS on a VLA larger than SIZE_MAX / 2
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70588
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
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Subject: [Bug c++/70649] New: [6 Regression] Incorrect C++ warning on zero-sized array passing
Date: Thu, 14 Apr 2016 00:34:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70649
Bug ID: 70649
Summary: [6 Regression] Incorrect C++ warning on zero-sized
array passing
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: hjl.tools at gmail dot com
CC: jason at redhat dot com
Target Milestone: ---
[hjl@gnu-6 pr60336d]$ cat x.i
struct dummy0 { int i; };
struct dummy { struct dummy0 d[0]; };
extern void fun(struct dummy, int);
void
foo (void)
{
struct dummy d;
fun(d, 1);
}
[hjl@gnu-6 pr60336d]$ g++ -S -Wabi=9 x.i
[hjl@gnu-6 pr60336d]$ cat x.s
.file "x.i"
.text
.globl _Z3foov
.type _Z3foov, @function
_Z3foov:
.LFB0:
.cfi_startproc
pushq %rbp
.cfi_def_cfa_offset 16
.cfi_offset 6, -16
movq %rsp, %rbp
.cfi_def_cfa_register 6
movl $1, %edi
call _Z3fun5dummyi
nop
popq %rbp
.cfi_def_cfa 7, 8
ret
.cfi_endproc
.LFE0:
.size _Z3foov, .-_Z3foov
.ident "GCC: (GNU) 5.3.1 20160406 (Red Hat 5.3.1-6)"
.section .note.GNU-stack,"",@progbits
[hjl@gnu-6 pr60336d]$ /export/build/gnu/gcc-x32/build-x86_64-linux/gcc/xg++
-B/export/build/gnu/gcc-x32/build-x86_64-linux/gcc/ -S -Wabi=9 x.i
x.i: In function ‘void foo()’:
x.i:8:12: warning: call to ‘fun’: empty class ‘dummy’ parameter passing ABI
changes in -fabi-version=10 (GCC 6) [-Wabi]
fun(d, 1);
^
[hjl@gnu-6 pr60336d]$ cat x.s
.file "x.i"
.text
.globl _Z3foov
.type _Z3foov, @function
_Z3foov:
.LFB0:
.cfi_startproc
pushq %rbp
.cfi_def_cfa_offset 16
.cfi_offset 6, -16
movq %rsp, %rbp
.cfi_def_cfa_register 6
movl $1, %edi
call _Z3fun5dummyi
nop
popq %rbp
.cfi_def_cfa 7, 8
ret
.cfi_endproc
.LFE0:
.size _Z3foov, .-_Z3foov
.ident "GCC: (GNU) 6.0.0 20160413 (experimental)"
.section .note.GNU-stack,"",@progbits
[hjl@gnu-6 pr60336d]$
The warning is incorrect since there is no change in zero-sized array passing.
>From gcc-bugs-return-522106-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 00:35:45 2016
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70649
H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-14
Target Milestone|--- |6.0
Ever confirmed|0 |1
>From gcc-bugs-return-522107-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 00:41:30 2016
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Subject: [Bug c++/70543] [6 Regression] wrong non-const error for enable_if and constexpr function
Date: Thu, 14 Apr 2016 00:41:00 -0000
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Patrick Palka <ppalka at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ppalka at gcc dot gnu.org
--- Comment #4 from Patrick Palka <ppalka at gcc dot gnu.org> ---
Reduced further:
template <typename>
struct X
{
template <unsigned int = 0>
static constexpr int
calc (void)
{
return 0;
}
static constexpr unsigned int value = calc (); // <<<<<<<
char foo[value];
};
>From gcc-bugs-return-522108-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 00:45:55 2016
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From: "howarth.at.gcc at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/70650] New: bootstrap failure on x86_64 darwin
Date: Thu, 14 Apr 2016 00:45:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70650
Bug ID: 70650
Summary: bootstrap failure on x86_64 darwin
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
Assignee: unassigned at gcc dot gnu.org
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At r234969, the bootstrap of x86_64-apple-darwin15 fails with...
libtool: compile: /sw/src/fink.build/gcc6-6.0.0-1/darwin_objdir/./gcc/xgcc
-shared-libgcc -B/sw/src/fink.build/gcc6-6.0.0-1/darwin_objdir/./gcc
-nostdinc++
-L/sw/src/fink.build/gcc6-6.0.0-1/darwin_objdir/x86_64-apple-darwin15.5.0/libstdc++-v3/src
-L/sw/src/fink.build/gcc6-6.0.0-1/darwin_objdir/x86_64-apple-darwin15.5.0/libstdc++-v3/src/.libs
-L/sw/src/fink.build/gcc6-6.0.0-1/darwin_objdir/x86_64-apple-darwin15.5.0/libstdc++-v3/libsupc++/.libs
-B/sw/lib/gcc6/x86_64-apple-darwin15.5.0/bin/
-B/sw/lib/gcc6/x86_64-apple-darwin15.5.0/lib/ -isystem
/sw/lib/gcc6/x86_64-apple-darwin15.5.0/include -isystem
/sw/lib/gcc6/x86_64-apple-darwin15.5.0/sys-include
-I/sw/src/fink.build/gcc6-6.0.0-1/gcc-6-20160413/libstdc++-v3/../libgcc
-I/sw/src/fink.build/gcc6-6.0.0-1/darwin_objdir/x86_64-apple-darwin15.5.0/libstdc++-v3/include/x86_64-apple-darwin15.5.0
-I/sw/src/fink.build/gcc6-6.0.0-1/darwin_objdir/x86_64-apple-darwin15.5.0/libstdc++-v3/include
-I/sw/src/fink.build/gcc6-6.0.0-1/gcc-6-20160413/libstdc++-v3/libsupc++
-I/sw/include -I/sw/include -std=gnu++11 -D_GLIBCXX_SHARED
-fno-implicit-templates -Wall -Wextra -Wwrite-strings -Wcast-qual -Wabi
-fdiagnostics-show-location=once -fvisibility-inlines-hidden
-ffunction-sections -fdata-sections -frandom-seed=string-inst.lo -g -O2 -c
../../../../../gcc-6-20160413/libstdc++-v3/src/c++11/string-inst.cc
-fno-common -DPIC -D_GLIBCXX_SHARED -o string-inst.o
In file included from
/sw/src/fink.build/gcc6-6.0.0-1/darwin_objdir/x86_64-apple-darwin15.5.0/libstdc++-v3/include/string:53:0,
from
../../../../../gcc-6-20160413/libstdc++-v3/src/c++11/string-inst.cc:38:
/sw/src/fink.build/gcc6-6.0.0-1/darwin_objdir/x86_64-apple-darwin15.5.0/libstdc++-v3/include/bits/basic_string.tcc:
In member function ‘void std::__cxx11::basic_string<_CharT, _Traits,
_Alloc>::_M_construct(_InIterator, _InIterator, std::forward_iterator_tag)
[with _FwdIterator = char*; _CharT = char; _Traits = std::char_traits<char>;
_Alloc = std::allocator<char>]’:
/sw/src/fink.build/gcc6-6.0.0-1/darwin_objdir/x86_64-apple-darwin15.5.0/libstdc++-v3/include/bits/basic_string.tcc:206:7:
internal compiler error: in emit_move_insn, at expr.c:3546
basic_string<_CharT, _Traits, _Alloc>::
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
libbacktrace could not find executable to open
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
Makefile:545: recipe for target 'string-inst.lo' failed
make[6]: *** [string-inst.lo] Error 1
make[6]: Leaving directory
'/sw/src/fink.build/gcc6-6.0.0-1/darwin_objdir/x86_64-apple-darwin15.5.0/libstdc++-v3/src/c++11'
Making all in filesystem
make[6]: Entering directory
'/sw/src/fink.build/gcc6-6.0.0-1/darwin_objdir/x86_64-apple-darwin15.5.0/libstdc++-v3/src/filesystem'
make[6]: Nothing to be done for 'all'.
make[6]: Leaving directory
'/sw/src/fink.build/gcc6-6.0.0-1/darwin_objdir/x86_64-apple-darwin15.5.0/libstdc++-v3/src/filesystem'
make[6]: Entering directory
'/sw/src/fink.build/gcc6-6.0.0-1/darwin_objdir/x86_64-apple-darwin15.5.0/libstdc++-v3/src'
make[6]: *** No rule to make target '../src/c++11/libc++11convenience.la',
needed by 'libstdc++-symbols.explist'. Stop.
make[6]: Leaving directory
'/sw/src/fink.build/gcc6-6.0.0-1/darwin_objdir/x86_64-apple-darwin15.5.0/libstdc++-v3/src'
Makefile:638: recipe for target 'all-recursive' failed
make[5]: *** [all-recursive] Error 1
make[5]: Leaving directory
'/sw/src/fink.build/gcc6-6.0.0-1/darwin_objdir/x86_64-apple-darwin15.5.0/libstdc++-v3/src'
Makefile:507: recipe for target 'all-recursive' failed
make[4]: *** [all-recursive] Error 1
make[4]: Leaving directory
'/sw/src/fink.build/gcc6-6.0.0-1/darwin_objdir/x86_64-apple-darwin15.5.0/libstdc++-v3'
Makefile:414: recipe for target 'all' failed
make[3]: *** [all] Error 2
make[3]: Leaving directory
'/sw/src/fink.build/gcc6-6.0.0-1/darwin_objdir/x86_64-apple-darwin15.5.0/libstdc++-v3'
Makefile:12290: recipe for target 'all-stage1-target-libstdc++-v3' failed
make[2]: *** [all-stage1-target-libstdc++-v3] Error 2
make[2]: Leaving directory '/sw/src/fink.build/gcc6-6.0.0-1/darwin_objdir'
Makefile:21196: recipe for target 'stage1-bubble' failed
make[1]: *** [stage1-bubble] Error 2
make[1]: Leaving directory '/sw/src/fink.build/gcc6-6.0.0-1/darwin_objdir'
Makefile:21500: recipe for target 'bootstrap' failed
make: *** [bootstrap] Error 2
>From gcc-bugs-return-522109-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 00:46:16 2016
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From: "law at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/64971] [5/6 Regression] gcc.c-torture/compile/pr37433.c ICEs with -mabi=ilp32
Date: Thu, 14 Apr 2016 00:46:00 -0000
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Jeffrey A. Law <law at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ramana at gcc dot gnu.org
--- Comment #10 from Jeffrey A. Law <law at redhat dot com> ---
Ramana, do you want to give this to someone on your team to wrap up?
>From gcc-bugs-return-522110-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 01:16:27 2016
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/70650] bootstrap failure on x86_64 darwin
Date: Thu, 14 Apr 2016 01:16:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-14
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed at revision r234962:
[Book15] f90/bug% gcc6 /opt/gcc/work/libstdc++-v3/src/c++11/string-inst.cc -O2
-c
In file included from /opt/gcc/gcc6w/include/c++/6.0.0/string:53:0,
from /opt/gcc/work/libstdc++-v3/src/c++11/string-inst.cc:38:
/opt/gcc/gcc6w/include/c++/6.0.0/bits/basic_string.tcc: In member function
'void std::__cxx11::basic_string<_CharT, _Traits,
_Alloc>::_M_construct(_InIterator, _InIterator, std::forward_iterator_tag)
[with _FwdIterator = char*; _CharT = char; _Traits = std::char_traits<char>;
_Alloc = std::allocator<char>]':
/opt/gcc/gcc6w/include/c++/6.0.0/bits/basic_string.tcc:206:7: internal compiler
error: in emit_move_insn, at expr.c:3546
basic_string<_CharT, _Traits, _Alloc>::
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>From gcc-bugs-return-522111-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 01:24:29 2016
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From: "wschmidt at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/70130] [6 Regression] h264ref fails with verification error starting with r231674 (r224221 is the true start of the problem)
Date: Thu, 14 Apr 2016 01:24:00 -0000
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Bill Schmidt <wschmidt at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[6 Regression] h264ref |[6 Regression] h264ref
|fails with verification |fails with verification
|error starting with r231674 |error starting with r231674
| |(r224221 is the true start
| |of the problem)
--- Comment #19 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
So, bisecting with -fno-vect-cost-model points the finger at
https://gcc.gnu.org/viewcvs/gcc?view=revision&revision=224221.
>From gcc-bugs-return-522112-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 01:26:48 2016
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From: "su at cs dot ucdavis.edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/70651] New: ICE on valid code on x86_64-linux-gnu in build_va_arg, at c-family/c-common.c:5728
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Bug ID: 70651
Summary: ICE on valid code on x86_64-linux-gnu in build_va_arg,
at c-family/c-common.c:5728
Product: gcc
Version: 6.0
Status: UNCONFIRMED
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The following code causes an ICE when compiled with the current gcc trunk on
x86_64-linux-gnu in both 32-bit and 64-bit modes.
It is a regression from 5.3.x.
$ gcc-trunk -v
Using built-in specs.
COLLECT_GCC=gcc-trunk
COLLECT_LTO_WRAPPER=/usr/local/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/6.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto
--prefix=/usr/local/gcc-trunk --disable-bootstrap
Thread model: posix
gcc version 6.0.0 20160413 (experimental) [trunk revision 234931] (GCC)
$
$ gcc-5.3 -c small.c
$
$ gcc-trunk -c small.c
small.c: In function ‘fn1’:
small.c:4:3: internal compiler error: in build_va_arg, at
c-family/c-common.c:5728
__builtin_va_arg (a, char **);
^~~~~~~~~~~~~~~~
0x6addfb build_va_arg(unsigned int, tree_node*, tree_node*)
../../gcc-source-trunk/gcc/c-family/c-common.c:5728
0x648643 c_parser_postfix_expression
../../gcc-source-trunk/gcc/c/c-parser.c:7615
0x64ab9a c_parser_unary_expression
../../gcc-source-trunk/gcc/c/c-parser.c:6890
0x64b9aa c_parser_cast_expression
../../gcc-source-trunk/gcc/c/c-parser.c:6719
0x64bbb4 c_parser_binary_expression
../../gcc-source-trunk/gcc/c/c-parser.c:6528
0x64c865 c_parser_conditional_expression
../../gcc-source-trunk/gcc/c/c-parser.c:6299
0x64cee0 c_parser_expr_no_commas
../../gcc-source-trunk/gcc/c/c-parser.c:6216
0x64d5e2 c_parser_expression
../../gcc-source-trunk/gcc/c/c-parser.c:8403
0x64e049 c_parser_expression_conv
../../gcc-source-trunk/gcc/c/c-parser.c:8436
0x66435c c_parser_statement_after_labels
../../gcc-source-trunk/gcc/c/c-parser.c:5272
0x666139 c_parser_compound_statement_nostart
../../gcc-source-trunk/gcc/c/c-parser.c:4856
0x6669ce c_parser_compound_statement
../../gcc-source-trunk/gcc/c/c-parser.c:4692
0x667bf7 c_parser_declaration_or_fndef
../../gcc-source-trunk/gcc/c/c-parser.c:2104
0x670d15 c_parser_external_declaration
../../gcc-source-trunk/gcc/c/c-parser.c:1548
0x6715a9 c_parser_translation_unit
../../gcc-source-trunk/gcc/c/c-parser.c:1429
0x6715a9 c_parse_file()
../../gcc-source-trunk/gcc/c/c-parser.c:17842
0x6d2c52 c_common_parse_file()
../../gcc-source-trunk/gcc/c-family/c-opts.c:1064
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
$
----------------------------------
void fn1 ()
{
char **a = 0;
__builtin_va_arg (a, char **);
}
>From gcc-bugs-return-522113-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 02:34:28 2016
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Subject: [Bug bootstrap/70652] New: [6 Regression] r234966 causes bootstrap to fail
Date: Thu, 14 Apr 2016 02:34:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70652
Bug ID: 70652
Summary: [6 Regression] r234966 causes bootstrap to fail
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
Assignee: unassigned at gcc dot gnu.org
Reporter: hjl.tools at gmail dot com
CC: msebor at gcc dot gnu.org
Target Milestone: ---
On Linux/x86-64, r234966 caused:
libtool: link: /export/gnu/import/git/gcc-test-intel64corei7/bld/./gcc/xgcc
-shared-libgcc -B/export/gnu/import/git/gcc-test-intel64corei7/bld/./gcc
-nostdinc++
-L/export/gnu/import/git/gcc-test-intel64corei7/bld/x86_64-pc-linux-gnu/32/libstdc++-v3/src
-L/export/gnu/import/git/gcc-test-intel64corei7/bld/x86_64-pc-linux-gnu/32/libstdc++-v3/src/.libs
-L/export/gnu/import/git/gcc-test-intel64corei7/bld/x86_64-pc-linux-gnu/32/libstdc++-v3/libsupc++/.libs
-B/usr/6.0.0/x86_64-pc-linux-gnu/bin/ -B/usr/6.0.0/x86_64-pc-linux-gnu/lib/
-isystem /usr/6.0.0/x86_64-pc-linux-gnu/include -isystem
/usr/6.0.0/x86_64-pc-linux-gnu/sys-include -m32 -fPIC -DPIC -shared -nostdlib
/lib/../lib/crti.o
/export/gnu/import/git/gcc-test-intel64corei7/bld/./gcc/32/crtbeginS.o
.libs/gij.o -Wl,-rpath
-Wl,/export/gnu/import/git/gcc-test-intel64corei7/bld/x86_64-pc-linux-gnu/32/libjava/.libs
-Wl,-rpath -Wl,/usr/6.0.0/lib/../lib
-L/export/gnu/import/git/gcc-test-intel64corei7/bld/x86_64-pc-linux-gnu/32/libjava/.libs
-L/export/gnu/import/git/gcc-test-intel64corei7/bld/x86_64-pc-linux-gnu/32/libstdc++-v3/src
-L/export/gnu/import/git/gcc-test-intel64corei7/bld/x86_64-pc-linux-gnu/32/libstdc++-v3/src/.libs
-L/export/gnu/import/git/gcc-test-intel64corei7/bld/x86_64-pc-linux-gnu/32/libstdc++-v3/libsupc++/.libs
./.libs/libgcj.so
-L/export/gnu/import/git/gcc-test-intel64corei7/bld/x86_64-pc-linux-gnu/32/libjava
-lpthread -lrt -ldl -lz
-L/export/gnu/import/git/gcc-test-intel64corei7/bld/./gcc/32 -L/lib/../lib
-L/usr/lib/../lib -L/export/gnu/import/git/gcc-test-intel64corei7/bld/./gcc -lc
-lgcc_s /export/gnu/import/git/gcc-test-intel64corei7/bld/./gcc/32/crtendS.o
/lib/../lib/crtn.o -m32 -m32 -m32 -Wl,-Bsymbolic -Wl,-soname
-Wl,libgij.so.17 -o .libs/libgij.so.17.0.0
./.libs/libgcj.so: undefined reference to `__cxa_throw_bad_array_length'
collect2: error: ld returned 1 exit status
Makefile:9534: recipe for target 'jv-convert' failed
make[8]: *** [jv-convert] Error 1
make[8]: *** Waiting for unfinished jobs....
./.libs/libgcj.so: undefined reference to `__cxa_throw_bad_array_length'
collect2: error: ld returned 1 exit status
Makefile:9481: recipe for target 'gcj-dbtool' failed
make[8]: *** [gcj-dbtool] Error 1
>From gcc-bugs-return-522115-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 02:36:24 2016
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Subject: [Bug bootstrap/70652] [6 Regression] r234966 causes bootstrap to fail
Date: Thu, 14 Apr 2016 02:36:00 -0000
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-14
Target Milestone|--- |6.0
Ever confirmed|0 |1
--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
GCC was configured with
--with-arch=corei7 --with-cpu=corei7 --prefix=/usr/6.0.0 --enable-clocale=gnu
--with-system-zlib --enable-shared --with-demangler-in-ld --enable-libmpx
--with-fpmath=sse --enable-languages=c,c++,fortran,java,lto,objc
>From gcc-bugs-return-522114-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 02:36:05 2016
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Subject: [Bug tree-optimization/70130] [6 Regression] h264ref fails with verification error starting with r231674 (r224221 is the true start of the problem)
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--- Comment #20 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Created attachment 38257
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38257&action=edit
Vectorization dump for r224220
>From gcc-bugs-return-522116-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 02:37:27 2016
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Subject: [Bug tree-optimization/70130] [6 Regression] h264ref fails with verification error starting with r231674 (r224221 is the true start of the problem)
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--- Comment #21 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Created attachment 38258
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Vectorization dump for r224221
>From gcc-bugs-return-522117-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 02:43:25 2016
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Subject: [Bug c++/70653] New: bubble sorting algorithm fail to run on the compiler giving a bug in it
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Bug ID: 70653
Summary: bubble sorting algorithm fail to run on the compiler
giving a bug in it
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wrong output can't find the bug
>From gcc-bugs-return-522118-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 02:46:49 2016
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Subject: [Bug tree-optimization/70130] [6 Regression] h264ref fails with verification error starting with r231674 (r224221 is the true start of the problem)
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--- Comment #22 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
The most suspicious thing I see in r224221 is following the gap adjustment:
vect__39.29_261 = REALIGN_LOAD <vect__39.26_282, vect__39.28_264,
vect__39.18_18>;
vectp_s.20_260 = vectp_s.20_278 + 18446744073709551560;
vect__39.30_247 = VEC_PERM_EXPR <vect__39.23_1, vect__39.25_297, { 0, 0, 0, 0
}>;
vect__39.31_246 = VEC_PERM_EXPR <vect__39.23_1, vect__39.25_297, { 0, 0, 0, 0
}>;
vect__39.32_243 = VEC_PERM_EXPR <vect__39.23_1, vect__39.25_297, { 0, 0, 0, 0
}>;
vect__39.33_242 = VEC_PERM_EXPR <vect__39.23_1, vect__39.25_297, { 0, 0, 0, 0
}>;
_39 = *_38[1];
vect__40.34_229 = VEC_PACK_TRUNC_EXPR <vect__39.30_247, vect__39.31_246>;
vect__40.34_228 = VEC_PACK_TRUNC_EXPR <vect__39.32_243, vect__39.33_242>;
_40 = (short int) _39;
Instead of interleaving results from the two vectors, this is splatting the
first element of one of them. Compare the code from r224220:
vect__39.61_161 = REALIGN_LOAD <vect__39.58_251, vect__39.60_179,
vect__39.50_259>;
vect_perm_even_143 = VEC_PERM_EXPR <vect__39.59_233, vect__39.61_161, { 0, 2,
4, 6 }>;
vect_perm_odd_125 = VEC_PERM_EXPR <vect__39.59_233, vect__39.61_161, { 1, 3,
5, 7 }>;
_39 = *_38[1];
vect__40.62_107 = VEC_PACK_TRUNC_EXPR <vect_perm_even_43,
vect_perm_even_143>;
_40 = (short int) _39;
I walked through the code enough to see that SLP_TREE_LOAD_PERMUTATION for the
SLP tree was just zeros, presumably uninitialized, when read in
tree-vect-slp.c:vect_transform_slp_perm_load. But I don't know enough about
this code to go further with this tonight.
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From: "wilson at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70613] -fabi-version docs don't match implementation
Date: Thu, 14 Apr 2016 04:13:00 -0000
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--- Comment #2 from Jim Wilson <wilson at gcc dot gnu.org> ---
Patch posted for review here
https://gcc.gnu.org/ml/gcc-patches/2016-04/msg00480.html
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Subject: [Bug bootstrap/70650] bootstrap failure on x86_64 darwin
Date: Thu, 14 Apr 2016 04:21:00 -0000
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--- Comment #2 from Jack Howarth <howarth.at.gcc at gmail dot com> ---
This regression is caused by the commit...
------------------------------------------------------------------------
r234959 | jason | 2016-04-13 16:11:20 -0400 (Wed, 13 Apr 2016) | 7 lines
Pass empty class parameters like C.
* call.c (pass_as_empty_struct, empty_class_arg): New.
(type_passed_as, build_x_va_arg): Use pass_as_empty_struct.
(build_call_a): Use empty_class_arg.
* cp-tree.h (CPTI_EMPTY_STRUCT, empty_struct_type): New.
* decl.c (cxx_init_decl_processing): Create empty_struct_type.
>From gcc-bugs-return-522121-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 04:28:22 2016
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Subject: [Bug c++/70613] -fabi-version docs don't match implementation
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--- Comment #3 from Jim Wilson <wilson at gcc dot gnu.org> ---
Patch posted for review here
https://gcc.gnu.org/ml/gcc-patches/2016-04/msg00480.html
>From gcc-bugs-return-522122-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 04:41:43 2016
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Subject: [Bug c++/70649] [6 Regression] Incorrect C++ warning on zero-sized array passing
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Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
CC| |jason at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |jason at gcc dot gnu.org
>From gcc-bugs-return-522123-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 05:42:37 2016
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Subject: [Bug bootstrap/70650] bootstrap failure on x86_64 darwin
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Please attach preprocessed source for string-inst.cc
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Subject: [Bug bootstrap/70650] [6 regression] bootstrap failure: ICE in emit_move_insn, at expr.c:3546
Date: Thu, 14 Apr 2016 05:59:00 -0000
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Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target|x86_64-apple-darwin15 |x86_64-apple-darwin15,
| |sparc-sun-solaris2.12
CC| |ro at gcc dot gnu.org
Host|x86_64-apple-darwin15 |x86_64-apple-darwin15,
| |sparc-sun-solaris2.12
Target Milestone|--- |6.0
Summary|bootstrap failure on x86_64 |[6 regression] bootstrap
|darwin |failure: ICE in
| |emit_move_insn, at
| |expr.c:3546
Build|x86_64-apple-darwin15 |x86_64-apple-darwin15,
| |sparc-sun-solaris2.12
--- Comment #4 from Rainer Orth <ro at gcc dot gnu.org> ---
I'm seeing the same on Solaris/SPARC.
In stage1, boils down to
$ cc1plus -fpreprocessed bitmap_allocator.ii -quiet -mcpu=v9 -std=gnu++98 -o
bitmap_allocator.s
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Subject: [Bug bootstrap/70650] [6 regression] bootstrap failure: ICE in emit_move_insn, at expr.c:3546
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--- Comment #5 from Rainer Orth <ro at gcc dot gnu.org> ---
Created attachment 38260
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38260&action=edit
preprocessed input
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/70651] ICE on valid code on x86_64-linux-gnu in build_va_arg, at c-family/c-common.c:5728
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-14
CC| |jakub at gcc dot gnu.org
Target Milestone|--- |6.0
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r223286. I wouldn't call this valid, for valid code the type
needs to be va_list and there needs to be va_start that initializes the va_list
object (or va_copy) and corresponding va_end.
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From: "osternhase at gmx dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/70654] New: failbit is not set sometimes on stream reading double outside presentable range
Date: Thu, 14 Apr 2016 06:47:00 -0000
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Bug ID: 70654
Summary: failbit is not set sometimes on stream reading double
outside presentable range
Product: gcc
Version: 4.8.4
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
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I am using Ubuntu 14.04 64-bit (x86_64). Following code snippet:
#include <iostream>
#include <sstream>
using namespace std;
int main(int argc, char *argv[])
{
istringstream a("-1.3E+40000");
double d;
a >> d;
if (a.fail())
cout << "Ok\n";
else
cout << "Bug\n";
istringstream b("-1.3E-40000\n");
b >> d;
if (b.fail())
cout << "Ok\n";
else
cout << "Bug\n";
return 0;
}
Compile:
g++ t.cpp -o t
result:
Ok
Bug
expected:
Ok
Ok
g++ -v
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/4.8/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu
4.8.4-2ubuntu1~14.04.1' --with-bugurl=file:///usr/share/doc/gcc-4.8/README.Bugs
--enable-languages=c,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-4.8 --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--with-gxx-include-dir=/usr/include/c++/4.8 --libdir=/usr/lib --enable-nls
--with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug
--enable-libstdcxx-time=yes --enable-gnu-unique-object --disable-libmudflap
--enable-plugin --with-system-zlib --disable-browser-plugin
--enable-java-awt=gtk --enable-gtk-cairo
--with-java-home=/usr/lib/jvm/java-1.5.0-gcj-4.8-amd64/jre --enable-java-home
--with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-4.8-amd64
--with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-4.8-amd64
--with-arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar
--enable-objc-gc --enable-multiarch --disable-werror --with-arch-32=i686
--with-abi=m64 --with-multilib-list=m32,m64,mx32 --with-tune=generic
--enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=x86_64-linux-gnu
Thread model: posix
gcc version 4.8.4 (Ubuntu 4.8.4-2ubuntu1~14.04.1)
strings /usr/lib/x86_64-linux-gnu/libstdc++.so.6 | grep LIBCXX :
GLIBCXX_3.4
GLIBCXX_3.4.1
GLIBCXX_3.4.2
GLIBCXX_3.4.3
GLIBCXX_3.4.4
GLIBCXX_3.4.5
GLIBCXX_3.4.6
GLIBCXX_3.4.7
GLIBCXX_3.4.8
GLIBCXX_3.4.9
GLIBCXX_3.4.10
GLIBCXX_3.4.11
GLIBCXX_3.4.12
GLIBCXX_3.4.13
GLIBCXX_3.4.14
GLIBCXX_3.4.15
GLIBCXX_3.4.16
GLIBCXX_3.4.17
GLIBCXX_3.4.18
GLIBCXX_3.4.19
GLIBCXX_DEBUG_MESSAGE_LENGTH
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Subject: [Bug tree-optimization/70623] [4.9/5/6 Regression] ICE in compute_antic at -O2
Date: Thu, 14 Apr 2016 07:31:00 -0000
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--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Apr 14 07:30:53 2016
New Revision: 234970
URL: https://gcc.gnu.org/viewcvs?rev=234970&root=gcc&view=rev
Log:
2016-04-14 Richard Biener <rguenther@suse.de>
PR tree-optimization/70623
* tree-ssa-pre.c (changed_blocks): Make global ...
(compute_antic): ... local here. Move and fix worklist
handling here. Do not clear EDGE_DFS_BACK or call mark_dfs_back_edges.
(compute_antic_aux): Add dumping for MAX assumed succs. Remove
worklist handling, dump when ANTIC_IN changed.
(compute_partial_antic_aux): Remove worklist handling.
(init_pre): Do not compute post dominators. Add a comment about
the CFG order chosen.
(fini_pre): Do not free post dominators.
* gcc.dg/torture/pr70623.c: New testcase.
* gcc.dg/torture/pr70623-2.c: Likewise.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr70623-2.c
trunk/gcc/testsuite/gcc.dg/torture/pr70623.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-pre.c
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Subject: [Bug tree-optimization/70623] [4.9/5 Regression] ICE in compute_antic at -O2
Date: Thu, 14 Apr 2016 07:32:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
Known to work|4.9.3, 5.3.0 |6.0
Summary|[4.9/5/6 Regression] ICE in |[4.9/5 Regression] ICE in
|compute_antic at -O2 |compute_antic at -O2
Known to fail|6.0 |4.9.3, 5.3.0
--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed on trunk sofar.
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Subject: [Bug c++/70655] New: selectio sort
Date: Thu, 14 Apr 2016 08:14:00 -0000
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Bug ID: 70655
Summary: selectio sort
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Created attachment 38261
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38261&action=edit
mutation testing
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Subject: [Bug tree-optimization/70130] [6 Regression] h264ref fails with verification error starting with r231674 (r224221 is the true start of the problem)
Date: Thu, 14 Apr 2016 08:21:00 -0000
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--- Comment #23 from Richard Biener <rguenth at gcc dot gnu.org> ---
But that's ok - we are storing the same scalar element:
t.i:12:3: note: Load permutation 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
t.i:12:3: note: no array mode for V8HI[16]
t.i:12:3: note: Final SLP tree for instance:
t.i:12:3: note: node
t.i:12:3: note: stmt 0 pretmp_32->mprr_2[1][j_57][0] = _40;
t.i:12:3: note: stmt 1 pretmp_32->mprr_2[1][j_57][1] = _40;
t.i:12:3: note: stmt 2 pretmp_32->mprr_2[1][j_57][2] = _40;
t.i:12:3: note: stmt 3 pretmp_32->mprr_2[1][j_57][3] = _40;
t.i:12:3: note: stmt 4 pretmp_32->mprr_2[1][j_57][4] = _40;
t.i:12:3: note: stmt 5 pretmp_32->mprr_2[1][j_57][5] = _40;
t.i:12:3: note: stmt 6 pretmp_32->mprr_2[1][j_57][6] = _40;
t.i:12:3: note: stmt 7 pretmp_32->mprr_2[1][j_57][7] = _40;
t.i:12:3: note: stmt 8 pretmp_32->mprr_2[1][j_57][8] = _40;
t.i:12:3: note: stmt 9 pretmp_32->mprr_2[1][j_57][9] = _40;
t.i:12:3: note: stmt 10 pretmp_32->mprr_2[1][j_57][10] = _40;
t.i:12:3: note: stmt 11 pretmp_32->mprr_2[1][j_57][11] = _40;
t.i:12:3: note: stmt 12 pretmp_32->mprr_2[1][j_57][12] = _40;
t.i:12:3: note: stmt 13 pretmp_32->mprr_2[1][j_57][13] = _40;
t.i:12:3: note: stmt 14 pretmp_32->mprr_2[1][j_57][14] = _40;
t.i:12:3: note: stmt 15 pretmp_32->mprr_2[1][j_57][15] = _40;
t.i:12:3: note: node
t.i:12:3: note: stmt 0 _40 = (short int) _39;
t.i:12:3: note: stmt 1 _40 = (short int) _39;
t.i:12:3: note: stmt 2 _40 = (short int) _39;
t.i:12:3: note: stmt 3 _40 = (short int) _39;
t.i:12:3: note: stmt 4 _40 = (short int) _39;
t.i:12:3: note: stmt 5 _40 = (short int) _39;
t.i:12:3: note: stmt 6 _40 = (short int) _39;
t.i:12:3: note: stmt 7 _40 = (short int) _39;
t.i:12:3: note: stmt 8 _40 = (short int) _39;
t.i:12:3: note: stmt 9 _40 = (short int) _39;
t.i:12:3: note: stmt 10 _40 = (short int) _39;
t.i:12:3: note: stmt 11 _40 = (short int) _39;
t.i:12:3: note: stmt 12 _40 = (short int) _39;
t.i:12:3: note: stmt 13 _40 = (short int) _39;
t.i:12:3: note: stmt 14 _40 = (short int) _39;
t.i:12:3: note: stmt 15 _40 = (short int) _39;
t.i:12:3: note: node
t.i:12:3: note: stmt 0 _39 = *_38[1];
t.i:12:3: note: stmt 1 _39 = *_38[1];
t.i:12:3: note: stmt 2 _39 = *_38[1];
t.i:12:3: note: stmt 3 _39 = *_38[1];
t.i:12:3: note: stmt 4 _39 = *_38[1];
t.i:12:3: note: stmt 5 _39 = *_38[1];
t.i:12:3: note: stmt 6 _39 = *_38[1];
t.i:12:3: note: stmt 7 _39 = *_38[1];
t.i:12:3: note: stmt 8 _39 = *_38[1];
t.i:12:3: note: stmt 9 _39 = *_38[1];
t.i:12:3: note: stmt 10 _39 = *_38[1];
t.i:12:3: note: stmt 11 _39 = *_38[1];
t.i:12:3: note: stmt 12 _39 = *_38[1];
t.i:12:3: note: stmt 13 _39 = *_38[1];
t.i:12:3: note: stmt 14 _39 = *_38[1];
t.i:12:3: note: stmt 15 _39 = *_38[1];
and
Creating dr for *_38[1]
analyze_innermost: success.
base_address: s_9(D)
offset from base address: 0
constant offset from base address: 4
step: 8
aligned to: 128
base_object: *s_9(D)
Access function 0: 1
Access function 1: {0B, +, 8}_1
this is an 'int' load accessing *_38[1] in the first and *_38[3] in the
second iteration. So we load a v4si from *_38[1], and then advance
by half of a vector. With my patch we still have the
__builtin_altivec_mask_for_load computed once, but that's bougs as the
alignment of the accesses changes each iteration.
Before the cited rev. we probably used interleaving and not SLP to vectorize
this loop. I think that for this special permutation using a scalar load
and splatting that would have been best, cost-wise.
Now we still first need to tell GCC that when using SLP the re-align
scheme doesn't work in this case.
The following seems to work and ends up generating unaligned loads (even with
-mcpu=power7):
Index: gcc/tree-vect-data-refs.c
===================================================================
--- gcc/tree-vect-data-refs.c (revision 234970)
+++ gcc/tree-vect-data-refs.c (working copy)
@@ -5983,10 +5983,19 @@ vect_supportable_dr_alignment (struct da
|| targetm.vectorize.builtin_mask_for_load ()))
{
tree vectype = STMT_VINFO_VECTYPE (stmt_info);
- if ((nested_in_vect_loop
- && (TREE_INT_CST_LOW (DR_STEP (dr))
- != GET_MODE_SIZE (TYPE_MODE (vectype))))
- || !loop_vinfo)
+
+ /* If we are doing SLP then the accesses need not have the
+ same alignment, instead it depends on the SLP group size. */
+ if (loop_vinfo
+ && STMT_SLP_TYPE (stmt_info)
+ && (LOOP_VINFO_VECT_FACTOR (loop_vinfo)
+ * GROUP_SIZE (vinfo_for_stmt (GROUP_FIRST_ELEMENT
(stmt_info))))
+ % TYPE_VECTOR_SUBPARTS (vectype) != 0)
+ ;
+ else if (!loop_vinfo
+ || (nested_in_vect_loop
+ && (TREE_INT_CST_LOW (DR_STEP (dr))
+ != GET_MODE_SIZE (TYPE_MODE (vectype)))))
return dr_explicit_realign;
else
return dr_explicit_realign_optimized;
So there's still the optimization opportunity to use single-element loads
plus vector splat (which probably all targets support) for the case of an
SLP load using this kind of permutation. I suppose open a new bug for that.
With -mcpu=power6 we fail to vectorize the loop (using interleaving would
require epilogue peeling which isn't possible here).
Can you check the above? Also whether it regresses any of the testsuite?
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Subject: [Bug bootstrap/70652] [6 Regression] r234966 causes bootstrap to fail
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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> ---
libgcj.so is not linked with libstdc++ (I think intentionally), and contains a
bunch of VLAs in there:
../../../libjava/jni.cc:542:17: warning: ISO C++ forbids variable length array
‘s’ [-Wvla]
../../../libjava/jni.cc:730:12: warning: ISO C++ forbids variable length array
[-Wvla]
../../../libjava/jni.cc:835:14: warning: ISO C++ forbids variable length array
[-Wvla]
../../../libjava/jni.cc:897:14: warning: ISO C++ forbids variable length array
[-Wvla]
../../../libjava/jni.cc:940:14: warning: ISO C++ forbids variable length array
[-Wvla]
../../../libjava/jni.cc:987:14: warning: ISO C++ forbids variable length array
[-Wvla]
../../../libjava/jni.cc:1229:12: warning: ISO C++ forbids variable length array
[-Wvla]
../../../libjava/jni.cc:2210:52: warning: ISO C++ forbids variable length array
‘buf’ [-Wvla]
../../../libjava/jni.cc:2341:72: warning: ISO C++ forbids variable length array
‘real_args’ [-Wvla]
../../../libjava/interpret-run.cc:36:33: warning: ISO C++ forbids variable
length array ‘stack’ [-Wvla]
../../../libjava/interpret-run.cc:39:35: warning: ISO C++ forbids variable
length array ‘locals’ [-Wvla]
../../../libjava/interpret-run.cc:45:36: warning: ISO C++ forbids variable
length array ‘locals_type’ [-Wvla]
../../../libjava/prims.cc:801:24: warning: ISO C++ forbids variable length
array ‘sizes’ [-Wvla]
../../../libjava/prims.cc:1533:47: warning: ISO C++ forbids variable length
array ‘lib_name’ [-Wvla]
../../../libjava/prims.cc:1578:43: warning: ISO C++ forbids variable length
array ‘lib_name’ [-Wvla]
../../../libjava/prims.cc:1730:40: warning: ISO C++ forbids variable length
array ‘vmArgs’ [-Wvla]
../../../libjava/verify.cc:898:37: warning: ISO C++ forbids variable length
array ‘arrayName’ [-Wvla]
../../../libjava/verify.cc:917:37: warning: ISO C++ forbids variable length
array ‘arrayName’ [-Wvla]
../../../libjava/verify.cc:2232:29: warning: ISO C++ forbids variable length
array ‘arg_types’ [-Wvla]
../../../libjava/verify.cc:2968:32: warning: ISO C++ forbids variable length
array ‘arg_types’ [-Wvla]
at least. I wonder why is r234966 apparently more aggressive than what 4.9 had
in, because I don't remember such issues in libgcj back then.
So, either we need to get rid of the VLAs and replace them say by alloca, or
have a way to disable this new stuff (which IMHO has been added way too late)
through command line option,
or need to link with libsupc++, or provide a stub for the symbol.
>From gcc-bugs-return-522133-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 08:29:03 2016
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Subject: [Bug tree-optimization/70130] [6 Regression] h264ref fails with verification error starting with r231674 (r224221 is the true start of the problem)
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----------------------------------------------------------------------------
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Subject: [Bug c++/70653] bubble sorting algorithm fail to run on the compiler giving a bug in it
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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> ---
we're not a tool to find bugs in your code
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Subject: [Bug c++/70655] selectio sort
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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> ---
not a bug
>From gcc-bugs-return-522136-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 08:34:48 2016
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Subject: [Bug bootstrap/70652] [6 Regression] r234966 causes bootstrap to fail
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Please just revert this for GCC 6, I'm sure it didn't fix a regression.
>From gcc-bugs-return-522137-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 08:36:11 2016
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Subject: [Bug bootstrap/70650] [6 regression] bootstrap failure: ICE in emit_move_insn, at expr.c:3546
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>From gcc-bugs-return-522138-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 08:45:48 2016
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Subject: [Bug ipa/70646] Corrupt truncated function
Date: Thu, 14 Apr 2016 08:45:00 -0000
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What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-14
CC| |hubicka at gcc dot gnu.org,
| |jamborm at gcc dot gnu.org
Component|c |ipa
Ever confirmed|0 |1
--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
;; Function broken (broken, funcdef_no=2, decl_uid=1764, cgraph_uid=2,
symbol_order=2) (executed once)
__attribute__((noclone, noinline))
broken (u64 * shost)
{
<bb 2>:
__builtin_unreachable ();
}
after inlining we see:
<bb 2>:
node_name[0] = 255;
node_name[1] = 255;
node_name[2] = 255;
node_name[3] = 255;
node_name[4] = 255;
node_name[5] = 255;
node_name[6] = 255;
node_name[7] = 255;
_14 = MEM[(const u64 *)&node_name];
_15 = __builtin_constant_p (_14);
if (_15 != 0)
goto <bb 3>;
else
goto <bb 4>;
...
<bb 4>:
iftmp.0_37 = _39(D);
__builtin_unreachable ();
which seems to be introduced by IPA CP:
__builtin_unreachable/9 (__builtin_unreachable) @0x7f1563274cf0
Type: function
Visibility: external public
References:
Referring:
Availability: not_available
First run: 0
Function flags:
Called by: wwn_to_u64.constprop.0/8
Calls:
wwn_to_u64.constprop.0/8 (wwn_to_u64.constprop) @0x7f1563274000
Type: function definition analyzed
Visibility:
References:
Referring:
Function wwn_to_u64.constprop/8 is inline copy in broken/2
Clone of wwn_to_u64/1
Availability: local
First run: 0
Function flags: local
Called by: broken/2 (inlined) (1.00 per call)
Calls: __builtin_constant_p/5 (1.00 per call) __builtin_unreachable/9
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Subject: [Bug ipa/70646] Corrupt truncated function
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--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Note that the testcase is strictly invalid as it has 8-byte aligned node_name[]
passed to wwn_to_u64 which ends up performing a 64bit load on it via __swab64p.
>From gcc-bugs-return-522140-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 08:49:04 2016
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Subject: [Bug ipa/70646] Corrupt truncated function
Date: Thu, 14 Apr 2016 08:49:00 -0000
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--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixing that with
void __attribute__((noinline,noclone)) broken(u64* shost)
{
u8 node_name[8] __attribute__((aligned(__alignof(u64)))) = { 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
*shost = wwn_to_u64(node_name);
}
still shows broken code. Note __swab64p is a quite stupid implementation
assuming GCC can't constant-fold __builtin_bswap64.
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Subject: [Bug ada/70645] [4.9/5/6 Regression] -fguess-branch-probability breaks debug-information, only in Ada
Date: Thu, 14 Apr 2016 08:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70645
Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Subject: [Bug bootstrap/70650] [6 regression] bootstrap failure: ICE in emit_move_insn, at expr.c:3546
Date: Thu, 14 Apr 2016 08:53:00 -0000
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Shorter testcase:
struct A {};
void
foo (struct A a, int b)
{
}
compiles with sparc-solaris C, but doesn't with C++.
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Subject: [Bug c++/70656] New: mutation testing of algorithum
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Bug ID: 70656
Summary: mutation testing of algorithum
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bubble sort testing
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Subject: [Bug bootstrap/70650] [6 regression] bootstrap failure: ICE in emit_move_insn, at expr.c:3546
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--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Seems sparc-solaris passes even for C the empty struct as a separate argument
(the empty struct goes into %o0, the int argument into %o1).
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Subject: [Bug c++/70656] mutation testing of algorithum
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ktkachov at gcc dot gnu.org changed:
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--- Comment #1 from ktkachov at gcc dot gnu.org ---
Not a bug.
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Subject: [Bug ipa/70646] Corrupt truncated function
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--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
Happens via
(gdb) bt
#0 redirect_to_unreachable (e=0x7ffff6891820)
at /space/rguenther/src/svn/trunk3/gcc/ipa-inline-analysis.c:735
#1 0x0000000000bc9325 in edge_set_predicate (e=0x7ffff6891820,
predicate=0x7fffffffc980)
at /space/rguenther/src/svn/trunk3/gcc/ipa-inline-analysis.c:768
#2 0x0000000000bd1df7 in remap_edge_summaries (inlined_edge=0x7ffff68912d8,
node=<cgraph_node* 0x7ffff69b1000 "wwn_to_u64.constprop">,
info=0x7ffff6994ba0, callee_info=0x7ffff6994c60, operand_map=...,
offset_map=..., possible_truths=0, toplev_predicate=0x7fffffffca30)
at /space/rguenther/src/svn/trunk3/gcc/ipa-inline-analysis.c:3500
#3 0x0000000000bd2603 in inline_merge_summary (edge=0x7ffff68912d8)
at /space/rguenther/src/svn/trunk3/gcc/ipa-inline-analysis.c:3647
#4 0x00000000017f2b84 in inline_call (e=0x7ffff68912d8, update_original=true,
Python Exception <class 'gdb.error'> There is no member or method named
m_vecpfx.:
new_edges=0x7fffffffd9d0, overall_size=0x25c63e0 <_ZL12overall_size>,
update_overall_summary=true, callee_removed=0x0)
at /space/rguenther/src/svn/trunk3/gcc/ipa-inline-transform.c:370
#5 0x00000000017e8953 in inline_small_functions ()
at /space/rguenther/src/svn/trunk3/gcc/ipa-inline.c:2022
#6 0x00000000017e9ca7 in ipa_inline ()
so somehow it get's confused:
BB 2 predicate:(true)
_3 = MEM[(const u64 *)wwn_2(D)];
freq:1.00 size: 1 time: 1
50% will be eliminated by inlining
Accounting size:0.50, time:0.50 on new predicate:(op0[ref
offset: 0] changed) && (not inlined)
Accounting size:0.50, time:0.50 on new predicate:(op0[ref
offset: 0] changed)
_4 = __builtin_constant_p (_3);
freq:1.00 size: 0 time: 0
if (_4 != 0)
freq:1.00 size: 2 time: 2
Accounting size:2.00, time:2.00 on predicate:(op0[ref offset:
0] changed)
BB 4 predicate:(op0[ref offset: 0] not constant)
iftmp.0_26 = __builtin_bswap64 (_3);
freq:0.61 size: 1 time: 1
BB 3 predicate:(true)
_5 = _3 << 56;
(BB 3 predicate shouldn't be true)
Honza? This seems to be somewhat fragile (redirecting things to unreachable
but _not_ changing the actual predicates in the IL). Claiming the
predicate is constant true is also a bit bogus (as can be seen in following
optimization).
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Subject: [Bug c++/70657] New: testing
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mutation testing
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Subject: [Bug c++/70540] [4.9/5/6 Regression] ICE on invalid code on x86_64-linux-gnu in cxx_incomplete_type_diagnostic, at cp/typeck2.c:569
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #5 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Looking into it.
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Subject: [Bug ipa/70646] [4.9/5/6 Regression] Corrupt truncated function
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |4.8.5
Target Milestone|--- |4.9.4
Summary|Corrupt truncated function |[4.9/5/6 Regression]
| |Corrupt truncated function
Known to fail| |4.9.3, 5.3.0, 6.0
>From gcc-bugs-return-522150-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 09:01:44 2016
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Subject: [Bug c++/70657] testing
Date: Thu, 14 Apr 2016 09:01:00 -0000
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James Greenhalgh <jgreenhalgh at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |jgreenhalgh at gcc dot gnu.org
Resolution|--- |INVALID
--- Comment #1 from James Greenhalgh <jgreenhalgh at gcc dot gnu.org> ---
Please, stop this.
>From gcc-bugs-return-522151-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 09:11:06 2016
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From: "jan.smets@alcatel-lucent.com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/63629] ICE in fix_loop_structure, at loop-init.c:251
Date: Thu, 14 Apr 2016 09:11:00 -0000
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Jan Smets <jan.smets@alcatel-lucent.com> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Jan Smets <jan.smets@alcatel-lucent.com> ---
Seems fixed.
>From gcc-bugs-return-522152-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 09:11:35 2016
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Subject: [Bug target/64971] [5/6 Regression] gcc.c-torture/compile/pr37433.c ICEs with -mabi=ilp32
Date: Thu, 14 Apr 2016 09:11:00 -0000
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--- Comment #11 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> ---
(In reply to Jeffrey A. Law from comment #10)
> Ramana, do you want to give this to someone on your team to wrap up?
Kyrill, do you mind picking this up ?
(In reply to Jeffrey A. Law from comment #9)
> Seems rather hackish to start accepting non-Pmode for the address. Though
> looking at the docs, I guess it's not strictly incorrect.
>
> The @code{symbol_ref} contains a mode, which is usually @code{Pmode}.
> Usually that is the only mode for which a symbol is directly valid.
>
> And the *call* pattern documentation waffles a bit too:
>
> Operand 0 should be a @code{mem} RTX whose address is the address of the
> function. Note, however, that this address can be a @code{symbol_ref}
> expression even if it would not be a legitimate memory address on the
> target machine.
>
> So I won't object to the aarch64 maintainers accepting the additional mode
> (Richard's approach), nor will I object to forcing the mode in the expander
> (Andrew's approach)
Forcing the mode in the expander and guarding it with TARGET_ILP32 looks more
appealing to me right now purely because of where we are with the release cycle
though the points Richard makes need to be looked into. I'll let the aarch64
maintainers decide on which one to take.
>From gcc-bugs-return-522153-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 09:13:58 2016
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Subject: [Bug target/66931] ICE in convert_move, at expr.c:316
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Jan Smets <jan.smets@alcatel-lucent.com> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Jan Smets <jan.smets@alcatel-lucent.com> ---
Seems fixed
>From gcc-bugs-return-522154-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 09:15:52 2016
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Subject: [Bug target/66920] ICE in expand_debug_locations, at cfgexpand.c:3826
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--- Comment #4 from Jan Smets <jan.smets@alcatel-lucent.com> ---
Seems fixed.
>From gcc-bugs-return-522155-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 09:24:46 2016
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Subject: [Bug debug/56805] DW_TAG_typedef missing when -fdebug-types-section is used (and -fno-eliminate-unused-debug-types)
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Jan Smets <jan.smets@alcatel-lucent.com> changed:
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----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
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--- Comment #8 from Jan Smets <jan.smets@alcatel-lucent.com> ---
Hopeless
>From gcc-bugs-return-522156-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 09:38:06 2016
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Subject: [Bug target/64971] [5/6 Regression] gcc.c-torture/compile/pr37433.c ICEs with -mabi=ilp32
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ktkachov at gcc dot gnu.org changed:
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--- Comment #12 from ktkachov at gcc dot gnu.org ---
My preference too at this stage is Andrew's patch.
I'll retest it on current trunk and ping it on the list if all goes fine.
>From gcc-bugs-return-522157-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 09:38:20 2016
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Subject: [Bug c++/70594] [6 Regression] -fcompare-debug failure
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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CC| |hubicka at gcc dot gnu.org
--- Comment #37 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
So the remaining issue is that for one function emitted in the
-fdump-final-insns= the cgraph uid is the same, but symbol_order= is different
(on the testcase by 1). This is the function with the highest node->order in
the file, so potentially it could affect more than that.
So, if we really want to make sure that node->order is the same regardless of
GC, we should either make sure the cgraph nodes for the constexpr function
copies needed for constexpr processing aren't created at all, or ae always
created freshly (e.g. by unregistering the cgraph nodes for them when we put
them into the freelist), or perhaps just by making sure we always update the
order. Let me find out where exactly is the cgraph node creation called from.
>From gcc-bugs-return-522158-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 09:42:42 2016
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Subject: [Bug c++/70336] [5 regression] Incorrect Wconversion warning
Date: Thu, 14 Apr 2016 09:42:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70336
Jan Smets <jan.smets@alcatel-lucent.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Severity|normal |minor
>From gcc-bugs-return-522159-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 09:44:43 2016
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Subject: [Bug tree-optimization/70614] [4.9/5/6 Regression] GCC gets stuck with -O
Date: Thu, 14 Apr 2016 09:44:00 -0000
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--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
We already have --param scev-max-expr-complexity (and --param
scev-max-expr-size)
for this.
But I have a simple fix for the testcase.
Index: tree-scalar-evolution.c
===================================================================
--- tree-scalar-evolution.c (revision 234970)
+++ tree-scalar-evolution.c (working copy)
@@ -1687,6 +1690,8 @@ interpret_condition_phi (struct loop *lo
(loop, PHI_ARG_DEF (condition_phi, i));
res = chrec_merge (res, branch_chrec);
+ if (res == chrec_dont_know)
+ break;
}
return res;
Improves the testcase to compile in 0.5s.
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Subject: [Bug c/70651] [6 Regression] ICE on valid code on x86_64-linux-gnu in build_va_arg, at c-family/c-common.c:5728
Date: Thu, 14 Apr 2016 10:01:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mpolacek at gcc dot gnu.org
--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Yeah, we should just reject the code. The ICE happens with cc1plus, too.
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Subject: [Bug libstdc++/70654] failbit is not set sometimes on stream reading double outside presentable range
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
We check for overflow (by comparing to plus or minus HUGE_VAL) but not
underflow.
To check for underflow we need to save and restore errno to see if it is set to
ERANGE by the call to strto{f,d,ld}_l.
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Subject: [Bug c/70651] [6 Regression] ICE on valid code on x86_64-linux-gnu in build_va_arg, at c-family/c-common.c:5728
Date: Thu, 14 Apr 2016 10:06:00 -0000
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--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
We have the code to reject this, but it happens only when gimplifying:
11695 if (have_va_type == NULL_TREE)
11696 {
11697 error_at (loc, "first argument to %<va_arg%> not of type
%<va_list%>");
11698 return GS_ERROR;
11699 }
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Subject: [Bug tree-optimization/70130] [6 Regression] h264ref fails with verification error starting with r231674 (r224221 is the true start of the problem)
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--- Comment #24 from Alan Modra <amodra at gmail dot com> ---
Created attachment 38266
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38266&action=edit
testcase for gcc.dg/vect/
Revised testcase checking multiple offsets, using an array of structs so not
dependent on var layout.
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Subject: [Bug c++/70594] [6 Regression] -fcompare-debug failure
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--- Comment #38 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Surprisingly, the actual problem is with __builtin_unreachable. I've
instrumented symbol_table::register_symbol, so that it logs this->order and
node->name () after assigning node->order, and get:
/tmp/orders1:3583 void __builtin_unreachable()
/tmp/orders1:3718 void __builtin_unreachable()
/tmp/orders1:4151 void __builtin_unreachable()
/tmp/orders1:4448 void __builtin_unreachable()
/tmp/orders2:3583 void __builtin_unreachable()
/tmp/orders2:3718 void __builtin_unreachable()
/tmp/orders2:4447 void __builtin_unreachable()
the node->order = 4151 case is the one that happens just in one of the copies.
The backtrace for that node->order = 4151 is:
#0 0x0000000000b305f2 in symbol_table::register_symbol (this=0x7ffff15a10a8,
node=0x7fffee1cbb80) at ../../gcc/cgraph.h:2455
#1 0x0000000000b2a530 in symtab_node::register_symbol (this=0x7fffee1cbb80) at
../../gcc/symtab.c:375
#2 0x0000000000b358b5 in cgraph_node::create (decl=<function_decl
0x7ffff1673000 __builtin_unreachable>) at ../../gcc/cgraph.c:507
#3 0x0000000000b359db in cgraph_node::get_create (decl=<function_decl
0x7ffff1673000 __builtin_unreachable>) at ../../gcc/cgraph.c:529
#4 0x0000000000cfd123 in gimple_get_virt_method_for_vtable (token=2,
v=<var_decl 0x7fffeeacdd80 CENSORED>, offset=256,
can_refer=0x7fffffffa0de) at ../../gcc/gimple-fold.c:5758
#5 0x0000000000cfd1c5 in gimple_get_virt_method_for_binfo (token=2,
known_binfo=<tree_binfo 0x7fffee9aed80>, can_refer=0x7fffffffa0de)
at ../../gcc/gimple-fold.c:5789
#6 0x0000000000db27a9 in possible_polymorphic_call_targets
(otr_type=<record_type 0x7fffef6873f0 CENSORED>, otr_token=2, context=...,
completep=0x7fffffffa2e7, cache_token=0x0, speculative=false) at
../../gcc/ipa-devirt.c:3164
#7 0x0000000001247bb3 in eliminate_dom_walker::before_dom_children
(this=0x7fffffffa5b0, b=<basic_block 0x7fffed94c888 (20)>)
at ../../gcc/tree-ssa-pre.c:4311
#8 0x0000000001944f05 in dom_walker::walk (this=0x7fffffffa5b0,
bb=<basic_block 0x7fffed94c888 (20)>) at ../../gcc/domwalk.c:265
#9 0x00000000012484a5 in eliminate (do_pre=false) at
../../gcc/tree-ssa-pre.c:4464
#10 0x00000000012492cb in (anonymous namespace)::pass_fre::execute
(this=0x27c9030, fun=0x7fffeea73930) at ../../gcc/tree-ssa-pre.c:4900
#11 0x0000000000f3d84c in execute_one_pass (pass=<opt_pass* 0x27c9030
"fre"(39)>) at ../../gcc/passes.c:2336
#12 0x0000000000f3db82 in execute_pass_list_1 (pass=<opt_pass* 0x27c9030
"fre"(39)>) at ../../gcc/passes.c:2420
#13 0x0000000000f3dbb3 in execute_pass_list_1 (pass=<opt_pass* 0x27c8d70
"early_optimizations"(33)>) at ../../gcc/passes.c:2421
#14 0x0000000000f3dc0b in execute_pass_list (fn=0x7fffeea73930, pass=<opt_pass*
0x27c8bf0 "fixup_cfg"(30)>) at ../../gcc/passes.c:2431
#15 0x0000000000f3c19f in do_per_function_toporder (callback=0xf3dbce
<execute_pass_list(function*, opt_pass*)>, data=0x27c8bf0)
at ../../gcc/passes.c:1725
#16 0x0000000000f3e7f0 in execute_ipa_pass_list (pass=<opt_pass* 0x27c8b90
"opt_local_passes"(29)>) at ../../gcc/passes.c:2773
#17 0x0000000000b4a7b9 in ipa_passes () at ../../gcc/cgraphunit.c:2265
#18 0x0000000000b4ac2d in symbol_table::compile (this=0x7ffff15a10a8) at
../../gcc/cgraphunit.c:2404
#19 0x0000000000b4afd4 in symbol_table::finalize_compilation_unit
(this=0x7ffff15a10a8) at ../../gcc/cgraphunit.c:2564
#20 0x00000000010513f1 in compile_file () at ../../gcc/toplev.c:490
#21 0x0000000001053948 in do_compile () at ../../gcc/toplev.c:1988
#22 0x0000000001053bcc in toplev::main (this=0x7fffffffddf0, argc=32,
argv=0x7fffffffdef8) at ../../gcc/toplev.c:2096
#23 0x0000000001a438a6 in main (argc=32, argv=0x7fffffffdef8) at
../../gcc/main.c:39
I'm really puzzled by multiple cgraph nodes being created for
__builtin_unreachable, that really should be the same decl each time.
The function in which this happens is not constexpr BTW.
I see the __builtin_unreachable first registered through:
#0 symbol_table::register_symbol (this=0x7ffff15a10a8, node=0x7fffed8e28a0) at
../../gcc/cgraph.h:2448
#1 0x0000000000b2a530 in symtab_node::register_symbol (this=0x7fffed8e28a0) at
../../gcc/symtab.c:375
#2 0x0000000000b358b5 in cgraph_node::create (decl=<function_decl
0x7ffff1673000 __builtin_unreachable>) at ../../gcc/cgraph.c:507
#3 0x0000000000b359db in cgraph_node::get_create (decl=<function_decl
0x7ffff1673000 __builtin_unreachable>) at ../../gcc/cgraph.c:529
#4 0x0000000000cfd123 in gimple_get_virt_method_for_vtable (token=2,
v=<var_decl 0x7fffeeacdd80 CENSORED>, offset=256,
can_refer=0x7fffffffae1e) at ../../gcc/gimple-fold.c:5758
#5 0x0000000000cfd1c5 in gimple_get_virt_method_for_binfo (token=2,
known_binfo=<tree_binfo 0x7fffee9aed80>, can_refer=0x7fffffffae1e)
at ../../gcc/gimple-fold.c:5789
#6 0x0000000000db27a9 in possible_polymorphic_call_targets
(otr_type=<record_type 0x7fffef6873f0 CENSORED>, otr_token=2, context=...,
completep=0x7fffffffb00f, cache_token=0x0, speculative=false) at
../../gcc/ipa-devirt.c:3164
#7 0x0000000000cfee70 in possible_polymorphic_call_targets (ref=<obj_type_ref
0x7fffeee1bd50>, call=<gimple_call 0x7fffed95fd80>,
completep=0x7fffffffb00f, cache_token=0x0) at ../../gcc/ipa-utils.h:131
#8 0x0000000000cf4237 in gimple_fold_call (gsi=0x7fffffffb350, inplace=false)
at ../../gcc/gimple-fold.c:3027
#9 0x0000000000cf6e9b in fold_stmt_1 (gsi=0x7fffffffb350, inplace=false,
valueize=0xcf746d <no_follow_ssa_edges(tree_node*)>)
at ../../gcc/gimple-fold.c:3726
#10 0x0000000000cf74e7 in fold_stmt (gsi=0x7fffffffb350) at
../../gcc/gimple-fold.c:3854
#11 0x0000000000d1572d in maybe_fold_stmt (gsi=0x7fffffffb350) at
../../gcc/gimplify.c:2336
during gimplification, then
#1 0x0000000000b3e9d6 in symbol_table::release_symbol (this=0x7ffff15a10a8,
node=<error reading variable: Cannot access memory at address 0x20>,
uid=3301) at ../../gcc/cgraph.h:2514
#2 0x0000000000b3972a in cgraph_node::remove (this=<error reading variable:
Cannot access memory at address 0x20>) at ../../gcc/cgraph.c:1896
#3 0x0000000000b2a7cd in symtab_node::remove (this=0x7fffed8e28a0) at
../../gcc/symtab.c:447
#4 0x0000000000b46ee6 in analyze_functions (first_time=true) at
../../gcc/cgraphunit.c:1199
#5 0x0000000000b4af4f in symbol_table::finalize_compilation_unit
(this=0x7ffff15a10a8) at ../../gcc/cgraphunit.c:2542
#6 0x00000000010513f1 in compile_file () at ../../gcc/toplev.c:490
throws away that cgraph node, then created again:
#0 symbol_table::register_symbol (this=0x7ffff15a10a8, node=0x7ffff16e7450) at
../../gcc/cgraph.h:2448
#1 0x0000000000b2a530 in symtab_node::register_symbol (this=0x7ffff16e7450) at
../../gcc/symtab.c:375
#2 0x0000000000b358b5 in cgraph_node::create (decl=<function_decl
0x7ffff1673000 __builtin_unreachable>) at ../../gcc/cgraph.c:507
#3 0x0000000000b359db in cgraph_node::get_create (decl=<function_decl
0x7ffff1673000 __builtin_unreachable>) at ../../gcc/cgraph.c:529
#4 0x0000000000cfd123 in gimple_get_virt_method_for_vtable (token=2,
v=<var_decl 0x7fffeeacdd80 CENSORED>, offset=256,
can_refer=0x7fffffffd83e) at ../../gcc/gimple-fold.c:5758
#5 0x0000000000cfd1c5 in gimple_get_virt_method_for_binfo (token=2,
known_binfo=<tree_binfo 0x7fffee9aed80>, can_refer=0x7fffffffd83e)
at ../../gcc/gimple-fold.c:5789
#6 0x0000000000db27a9 in possible_polymorphic_call_targets
(otr_type=<record_type 0x7fffef6873f0 CENSORED>, otr_token=2, context=...,
completep=0x7fffffffda57, cache_token=0x7fffffffda58, speculative=false) at
../../gcc/ipa-devirt.c:3164
#7 0x0000000000b4b8d2 in possible_polymorphic_call_targets (e=0x7fffed9653a8,
completep=0x7fffffffda57, cache_token=0x7fffffffda58,
speculative=false) at ../../gcc/ipa-utils.h:114
#8 0x0000000000df41be in walk_polymorphic_call_targets
(reachable_call_targets=0x7fffffffdaf0, edge=0x7fffed9653a8,
first=0x7fffffffdb80,
reachable=0x7fffffffdb50, before_inlining_p=true) at ../../gcc/ipa.c:167
#9 0x0000000000df4cfb in symbol_table::remove_unreachable_nodes
(this=0x7ffff15a10a8, file=0x0) at ../../gcc/ipa.c:428
but surprisingly I then see the node->order = 4151 first backtrace, without
release_symbol. So, are cgraph nodes garbage collected?
>From gcc-bugs-return-522165-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 10:50:45 2016
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Subject: [Bug c++/70594] [6 Regression] -fcompare-debug failure
Date: Thu, 14 Apr 2016 10:50:00 -0000
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--- Comment #39 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Sorry, error on my part.
There is actually
#1 0x0000000000b3e9d6 in symbol_table::release_symbol (this=0x7ffff15a10a8,
node=<error reading variable: Cannot access memory at address 0x20>,
uid=0) at ../../gcc/cgraph.h:2514
#2 0x0000000000b3972a in cgraph_node::remove (this=<error reading variable:
Cannot access memory at address 0x20>) at ../../gcc/cgraph.c:1896
#3 0x0000000000df52c0 in symbol_table::remove_unreachable_nodes
(this=0x7ffff15a10a8, file=0x0) at ../../gcc/ipa.c:531
#4 0x0000000000f3cf1d in execute_todo (flags=448) at ../../gcc/passes.c:2024
#5 0x0000000000f3d9b6 in execute_one_pass (pass=<opt_pass* 0x27c85f0
"visibility"(18)>) at ../../gcc/passes.c:2376
#6 0x0000000000f3e798 in execute_ipa_pass_list (pass=<opt_pass* 0x27c85f0
"visibility"(18)>) at ../../gcc/passes.c:2766
#7 0x0000000000b4a7b9 in ipa_passes () at ../../gcc/cgraphunit.c:2265
#8 0x0000000000b4ac2d in symbol_table::compile (this=0x7ffff15a10a8) at
../../gcc/cgraphunit.c:2404
#9 0x0000000000b4afd4 in symbol_table::finalize_compilation_unit
(this=0x7ffff15a10a8) at ../../gcc/cgraphunit.c:2564
in between.
>From gcc-bugs-return-522166-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 10:55:30 2016
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Subject: [Bug target/70662] New: vpbroadcastq assemble failure with -masm=intel -mavx512vbmi
Date: Thu, 14 Apr 2016 10:55:00 -0000
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Bug ID: 70662
Summary: vpbroadcastq assemble failure with -masm=intel
-mavx512vbmi
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Keywords: assemble-failure
Severity: normal
Priority: P3
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Target: x86_64-pc-linux-gnu
Created attachment 38267
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38267&action=edit
reduced testcase
Compiler output:
$ gcc -Og -fschedule-insns -fno-tree-fre -mavx512vbmi
--param=max-sched-ready-insns=1 -masm=intel testcase.c
/tmp/cc4IEVUE.s: Assembler messages:
/tmp/cc4IEVUE.s:383: Error: operand size mismatch for `vpbroadcastq'
The failing instruction is:
vpbroadcastq zmm17{k1}, XMMWORD PTR [rsp+4536]
s/XMMWORD/QWORD/ fixes the assembly. The second operand is a QWORD, but if a
register is referenced, it is an XMM register (only 64 bits are used).
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Subject: [Bug ipa/70646] [4.9/5/6 Regression] Corrupt truncated function
Date: Thu, 14 Apr 2016 11:10:00 -0000
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--- Comment #12 from H.J. Lu <hjl.tools at gmail dot com> ---
It was caused by r208831.
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Subject: [Bug target/70568] [4.9/5/6 regression] PowerPC64: union of floating and fixed doesn't use POWER8 GPR/VSR moves
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What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ra
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Subject: [Bug fortran/70330] [5 Regression] ICE with -Wextra -Wno-unused-dummy-argument and unused optional dummy argument
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----------------------------------------------------------------------------
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Subject: [Bug testsuite/70108] [5/6 Regression] FAIL: gcc.dg/simulate-thread/speculative-store-2.c -O0 -g thread simulation test
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What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |5.4
Summary|[5,6 Regression] FAIL: |[5/6 Regression] FAIL:
|gcc.dg/simulate-thread/spec |gcc.dg/simulate-thread/spec
|ulative-store-2.c -O0 -g |ulative-store-2.c -O0 -g
|thread simulation test |thread simulation test
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Subject: [Bug c++/70494] [5/6 regression] Internal Compiler Error: Capturing an array of vectors in a lambda
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What |Removed |Added
----------------------------------------------------------------------------
Known to work| |4.9.3
Target Milestone|--- |5.4
Summary|[5 regression] Internal |[5/6 regression] Internal
|Compiler Error: Capturing |Compiler Error: Capturing
|an array of vectors in a |an array of vectors in a
|lambda |lambda
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Subject: [Bug c++/70627] [6 Regression] internal compiler error: verify_type failed
Date: Thu, 14 Apr 2016 11:44:00 -0000
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--- Comment #10 from jseward at acm dot org ---
Thank you for fixing this quickly!
>From gcc-bugs-return-522173-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 11:51:18 2016
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Subject: [Bug target/70662] vpbroadcastq assemble failure with -masm=intel -mavx512vbmi
Date: Thu, 14 Apr 2016 11:51:00 -0000
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Kirill Yukhin <kyukhin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2016-04-14
Assignee|unassigned at gcc dot gnu.org |kyukhin at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Kirill Yukhin <kyukhin at gcc dot gnu.org> ---
I'll take a look.
>From gcc-bugs-return-522174-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 12:25:36 2016
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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/70651] [6 Regression] ICE on valid code on x86_64-linux-gnu in build_va_arg, at c-family/c-common.c:5728
Date: Thu, 14 Apr 2016 12:25:00 -0000
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--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
And we seem to do the right thing if I just do away with the canon_expr_type:
diff --git a/gcc/c-family/c-common.c b/gcc/c-family/c-common.c
index 30c815d..8b0a34b 100644
--- a/gcc/c-family/c-common.c
+++ b/gcc/c-family/c-common.c
@@ -5722,11 +5722,6 @@ build_va_arg (location_t loc, tree expr, tree type)
mark_addressable (expr);
expr = build1 (ADDR_EXPR, build_pointer_type (TREE_TYPE (expr)), expr);
- /* Verify that &ap is still recognized as having va_list type. */
- tree canon_expr_type
- = targetm.canonical_va_list_type (TREE_TYPE (expr));
- gcc_assert (canon_expr_type != NULL_TREE);
-
return build_va_arg_1 (loc, type, expr);
}
(there are two spots like that)
>From gcc-bugs-return-522175-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 12:32:05 2016
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Subject: [Bug c++/70647] Feature request: warning for self-moving in constructors
Date: Thu, 14 Apr 2016 12:32:00 -0000
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--- Comment #2 from Matt Godbolt <matt at godbolt dot org> ---
Thanks Manuel. Interestingly this does elicit a warning:
struct B {
int a; int b;
B(B &&o)
: a(static_cast<int>(a)),
b(std::move(o.b)) {}
};
but this does not:
struct B {
int a; int b;
B(B &&o)
: a(static_cast<int&&>(a)),
b(std::move(o.b)) {}
};
That said; I believe bug 19808 would indeed help in this situation!
>From gcc-bugs-return-522176-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 12:34:26 2016
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Subject: [Bug tree-optimization/70130] [6 Regression] h264ref fails with verification error starting with r231674 (r224221 is the true start of the problem)
Date: Thu, 14 Apr 2016 12:34:00 -0000
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--- Comment #25 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
I've verified the patch indeed fixes the test from c#11. Regstrap in progress.
One nit: The parentheses in the proposed patch are slightly wrong, should be:
&& (LOOP_VINFO_VECT_FACTOR (loop_vinfo)
* GROUP_SIZE (vinfo_for_stmt (GROUP_FIRST_ELEMENT
(stmt_info)))
% TYPE_VECTOR_SUBPARTS (vectype) != 0))
>From gcc-bugs-return-522177-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 12:42:52 2016
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Subject: [Bug c++/70594] [6 Regression] -fcompare-debug failure
Date: Thu, 14 Apr 2016 12:42:00 -0000
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--- Comment #40 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
So, some further printf debugging shows that the first difference is that in
one of the possible_polymorphic_call_targets calls (which creates the
node->order == 4151 __builtin_unreachable in one with -g2 only and not with -g2
-gtoggle, the first backtrace in #c38) there is a difference in the
context->maybe_in_construction flag - with -g2 it is 0, with -g2 -gtoggle it is
1.
>From gcc-bugs-return-522178-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 12:50:19 2016
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From: "osternhase at gmx dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/70664] New: failbit is not set on stream reading negative value into unsigned type
Date: Thu, 14 Apr 2016 12:50:00 -0000
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Bug ID: 70664
Summary: failbit is not set on stream reading negative value
into unsigned type
Product: gcc
Version: 4.8.4
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Severity: normal
Priority: P3
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I am using Ubuntu 14.04 64-bit (x86_64). Following code snippet:
#include <iostream>
#include <sstream>
using namespace std;
template <typename T>
void test(const char * str)
{
istringstream a(str);
T i;
a >> i;
if (a.fail())
cout << "Ok\n";
else
cout << "Bug\n";
}
int main(int argc, char *argv[])
{
test<int>("2147483648"); // INT_MIN-1
test<int>("-2147483649"); // INT_MAX+1
test<unsigned>("4294967296"); // UINT_MAX+1
test<unsigned>("-1");
return 0;
}
Compile:
g++ t.cpp -o t
result:
Ok
Ok
Ok
Bug
expected:
Ok
Ok
Ok
Ok
g++ -v
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/4.8/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu
4.8.4-2ubuntu1~14.04.1' --with-bugurl=file:///usr/share/doc/gcc-4.8/README.Bugs
--enable-languages=c,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-4.8 --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--with-gxx-include-dir=/usr/include/c++/4.8 --libdir=/usr/lib --enable-nls
--with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug
--enable-libstdcxx-time=yes --enable-gnu-unique-object --disable-libmudflap
--enable-plugin --with-system-zlib --disable-browser-plugin
--enable-java-awt=gtk --enable-gtk-cairo
--with-java-home=/usr/lib/jvm/java-1.5.0-gcj-4.8-amd64/jre --enable-java-home
--with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-4.8-amd64
--with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-4.8-amd64
--with-arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar
--enable-objc-gc --enable-multiarch --disable-werror --with-arch-32=i686
--with-abi=m64 --with-multilib-list=m32,m64,mx32 --with-tune=generic
--enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=x86_64-linux-gnu
Thread model: posix
gcc version 4.8.4 (Ubuntu 4.8.4-2ubuntu1~14.04.1)
strings /usr/lib/x86_64-linux-gnu/libstdc++.so.6 | grep LIBCXX :
GLIBCXX_3.4
GLIBCXX_3.4.1
GLIBCXX_3.4.2
GLIBCXX_3.4.3
GLIBCXX_3.4.4
GLIBCXX_3.4.5
GLIBCXX_3.4.6
GLIBCXX_3.4.7
GLIBCXX_3.4.8
GLIBCXX_3.4.9
GLIBCXX_3.4.10
GLIBCXX_3.4.11
GLIBCXX_3.4.12
GLIBCXX_3.4.13
GLIBCXX_3.4.14
GLIBCXX_3.4.15
GLIBCXX_3.4.16
GLIBCXX_3.4.17
GLIBCXX_3.4.18
GLIBCXX_3.4.19
GLIBCXX_DEBUG_MESSAGE_LENGTH
>From gcc-bugs-return-522179-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 12:59:21 2016
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Subject: [Bug tree-optimization/70130] [6 Regression] h264ref fails with verification error starting with r231674 (r224221 is the true start of the problem)
Date: Thu, 14 Apr 2016 12:59:00 -0000
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--- Comment #26 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Ah, I see from IRC that Alan has already done a regstrap and reported no
failures.
>From gcc-bugs-return-522181-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 13:17:41 2016
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Subject: [Bug tree-optimization/70130] [6 Regression] h264ref fails with verification error starting with r231674 (r224221 is the true start of the problem)
Date: Thu, 14 Apr 2016 13:17:00 -0000
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--- Comment #27 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
However, that was with the parentheses misplaced. I've completed a bootstrap
and regression test on powerpc64le-unknown-linux-gnu with this corrected, and
everything is still fine.
>From gcc-bugs-return-522180-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 13:17:09 2016
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70594] [6 Regression] -fcompare-debug failure
Date: Thu, 14 Apr 2016 13:17:00 -0000
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--- Comment #41 from Richard Biener <rguenth at gcc dot gnu.org> ---
Maybe decl_maybe_in_construction_p using BLOCKs. I suppose it should restrict
itself to inlined_function_outer_scope_p ()s which we surely preserve.
for (tree block = gimple_block (call); block && TREE_CODE (block) == BLOCK;
block = BLOCK_SUPERCONTEXT (block))
if (tree fn = inlined_polymorphic_ctor_dtor_block_p (block, check_clones))
{
tree type = TYPE_METHOD_BASETYPE (TREE_TYPE (fn));
if (!outer_type || !types_odr_comparable (type, outer_type))
{
if (TREE_CODE (type) == RECORD_TYPE
&& TYPE_BINFO (type)
&& polymorphic_type_binfo_p (TYPE_BINFO (type)))
return true;
}
else if (types_same_for_odr (type, outer_type))
return true;
}
>From gcc-bugs-return-522182-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 13:19:10 2016
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Subject: [Bug c/70665] New: Seemingly incorrect warning for being const correct with function pointers
Date: Thu, 14 Apr 2016 13:19:00 -0000
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Bug ID: 70665
Summary: Seemingly incorrect warning for being const correct
with function pointers
Product: gcc
Version: 4.8.2
Status: UNCONFIRMED
Severity: normal
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Component: c
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void foo( const char *p );
void bar( char *p ) { foo( p ); }
This is perfectly acceptable and const correct since foo does not want write
access, but being given write access anyway is fine. I have run into a
seemingly incorrect warning though when calling such functions via pointer:
void foo( const char *p );
void bar( void (*fn)(char *p) );
bar( foo );
^^ generates warning about pointers not being compatible.
Apparently gcc thinks that when called via a pointer, it is not correct to pass
a writable pointer where only a read only one is needed.
>From gcc-bugs-return-522184-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 13:22:26 2016
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Subject: [Bug tree-optimization/70614] [4.9/5 Regression] GCC gets stuck with -O
Date: Thu, 14 Apr 2016 13:22:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
Known to work| |6.0
Summary|[4.9/5/6 Regression] GCC |[4.9/5 Regression] GCC gets
|gets stuck with -O |stuck with -O
Known to fail|6.0 |
--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed on trunk sofar.
>From gcc-bugs-return-522183-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 13:22:25 2016
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Subject: [Bug tree-optimization/70614] [4.9/5/6 Regression] GCC gets stuck with -O
Date: Thu, 14 Apr 2016 13:22:00 -0000
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--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Apr 14 13:21:40 2016
New Revision: 234972
URL: https://gcc.gnu.org/viewcvs?rev=234972&root=gcc&view=rev
Log:
2016-04-14 Richard Biener <rguenther@suse.de>
PR tree-optimization/70614
* tree-scalar-evolution.c (analyze_evolution_in_loop): Terminate
loop if the evolution dropped to chrec_dont_know.
(interpret_condition_phi): Likewise.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree-scalar-evolution.c
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Subject: [Bug c++/70594] [6 Regression] -fcompare-debug failure
Date: Thu, 14 Apr 2016 13:23:00 -0000
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--- Comment #42 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I see a difference when tree-ssa-pre.c calls
context.get_dynamic_type (instance, OBJ_TYPE_REF_OBJECT (fn), otr_type, stmt);
in get_dynamic_type, right after the first walk_aliased_vdefs in there, in one
invocation I get:
$16 = {offset = 0, instance = <ssa_name 0x7ffff0ef22d0>, vtbl_ptr_ref =
<component_ref 0x7fffede2e4e0>,
otr_type = <record_type 0x7fffef4ec540 CENSORED>, known_current_type = <tree
0x0>, known_current_offset = 0, speculative = 14,
type_maybe_changed = false, multiple_types_encountered = false,
seen_unanalyzed_store = true}
and in the other
$15 = {offset = 0, instance = <ssa_name 0x7ffff1052c18>, vtbl_ptr_ref =
<component_ref 0x7fffed95d780>,
otr_type = <record_type 0x7fffef6873f0 CENSORED>, known_current_type = <tree
0x0>, known_current_offset = 0, speculative = 13,
type_maybe_changed = false, multiple_types_encountered = false,
seen_unanalyzed_store = false}
>From gcc-bugs-return-522185-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 13:23:02 2016
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Subject: [Bug tree-optimization/70130] [6 Regression] h264ref fails with verification error starting with r231674 (r224221 is the true start of the problem)
Date: Thu, 14 Apr 2016 13:23:00 -0000
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--- Comment #28 from Alan Modra <amodra at gmail dot com> ---
Bootstrapped and regression testing now completed on both powerpc64le-linux and
-m64/-m32 on a power7 powerpc64-linux host, all langs. No regressions found,
and it seems this also fixes gcc.dg/vect/slp-perm-12.c on power7
powerpc64-linux.
Thanks!
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Subject: [Bug c/70665] Seemingly incorrect warning for being const correct with function pointers
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Because const char * and char * are not compatible types. That is they have an
implicit conversion between the two but are still not compatible types.
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Subject: [Bug c++/70594] [6 Regression] -fcompare-debug failure
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--- Comment #43 from Richard Biener <rguenth at gcc dot gnu.org> ---
Same walking of BLOCKs in noncall_stmt_may_be_vtbl_ptr_store.
>From gcc-bugs-return-522189-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 13:30:18 2016
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Subject: [Bug c++/70594] [6 Regression] -fcompare-debug failure
Date: Thu, 14 Apr 2016 13:30:00 -0000
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--- Comment #44 from Richard Biener <rguenth at gcc dot gnu.org> ---
Index: gcc/ipa-polymorphic-call.c
===================================================================
--- gcc/ipa-polymorphic-call.c (revision 234971)
+++ gcc/ipa-polymorphic-call.c (working copy)
@@ -485,6 +485,9 @@ contains_type_p (tree outer_type, HOST_W
tree
inlined_polymorphic_ctor_dtor_block_p (tree block, bool check_clones)
{
+ if (! inlined_function_outer_scope_p (block))
+ return NULL_TREE;
+
tree fn = block_ultimate_origin (block);
if (fn == NULL || TREE_CODE (fn) != FUNCTION_DECL)
return NULL_TREE;
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Subject: [Bug c/70665] Seemingly incorrect warning for being const correct with function pointers
Date: Thu, 14 Apr 2016 13:31:00 -0000
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--- Comment #2 from Phillipi Susi <psusi at ubuntu dot com> ---
Yes, so why is there an implicit conversion that does not cause a warning when
called directly, but not when called via pointer?
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Subject: [Bug ada/70645] strange -fguess-branch-probability issue with debug info
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |ebotcazou at gcc dot gnu.org
Resolution|--- |WORKSFORME
Summary|[4.9/5/6 Regression] |strange
|-fguess-branch-probability |-fguess-branch-probability
|breaks debug-information, |issue with debug info
|only in Ada |
--- Comment #1 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
I cannot reproduce on Linux. Besides there is no guarantee that debug info be
fully correct, except for -O0 and -Og. Try to break on "Hello" instead or to
fiddle with the various -gdwarf options since this is Darwin.
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Subject: [Bug bootstrap/70650] [6 regression] bootstrap failure: ICE in emit_move_insn, at expr.c:3546
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--- Comment #8 from Jason Merrill <jason at gcc dot gnu.org> ---
Created attachment 38269
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38269&action=edit
patch
This fixes the reduced testcase for me on sparc, does it fix bootstrap on the
various targets?
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Subject: [Bug middle-end/70643] broken openacc reduction inside a fortran module
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--- Comment #1 from cesar at gcc dot gnu.org ---
Author: cesar
Date: Thu Apr 14 13:44:17 2016
New Revision: 234973
URL: https://gcc.gnu.org/viewcvs?rev=234973&root=gcc&view=rev
Log:
PR middle-end/70643
gcc/
* omp-low.c (lower_oacc_reductions): Check for TREE_CONSTANT
when building a mem ref for the incoming reduction variable.
libgomp/
* testsuite/libgomp.oacc-fortran/pr70643.f90: New test.
Added:
trunk/libgomp/testsuite/libgomp.oacc-fortran/pr70643.f90
Modified:
trunk/gcc/ChangeLog
trunk/gcc/omp-low.c
trunk/libgomp/ChangeLog
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Subject: [Bug target/70044] [5 Regression] -flto turns on -fomit-frame-pointer
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--- Comment #8 from ktkachov at gcc dot gnu.org ---
Author: ktkachov
Date: Thu Apr 14 13:45:34 2016
New Revision: 234974
URL: https://gcc.gnu.org/viewcvs?rev=234974&root=gcc&view=rev
Log:
[AArch64] Backport of PR target/70044 fix to GCC 5
2016-04-14 Nick Clifton <nickc@redhat.com>
Kyrylo Tkachov <kyrylo.tkachov@arm.com>
PR target/70044
* config/aarch64/aarch64.c
(aarch64_override_options_after_change): When forcing
flag_omit_frame_pointer to be true, use a special value that can
be detected if this function is called again, thus preventing
flag_omit_leaf_frame_pointer from being forced to be false.
* gcc.target/aarch64/pr70044.c: New test.
Added:
branches/gcc-5-branch/gcc/testsuite/gcc.target/aarch64/pr70044.c
Modified:
branches/gcc-5-branch/gcc/ChangeLog
branches/gcc-5-branch/gcc/config/aarch64/aarch64.c
branches/gcc-5-branch/gcc/testsuite/ChangeLog
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Subject: [Bug target/70044] [5 Regression] -flto turns on -fomit-frame-pointer
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----------------------------------------------------------------------------
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--- Comment #9 from ktkachov at gcc dot gnu.org ---
Fixed.
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Subject: [Bug bootstrap/70650] [6 regression] bootstrap failure: ICE in emit_move_insn, at expr.c:3546
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--- Comment #9 from Jack Howarth <howarth.at.gcc at gmail dot com> ---
Created attachment 38270
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bzip2 compressed preprocessed source for libstdc++-v3/src/c++11/string-inst.cc
on x86_64-apple-darwin15
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/70643] broken openacc reduction inside a fortran module
Date: Thu, 14 Apr 2016 13:50:00 -0000
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cesar at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #2 from cesar at gcc dot gnu.org ---
Fixed in r234973.
>From gcc-bugs-return-522198-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 13:56:14 2016
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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++/70594] [6 Regression] -fcompare-debug failure
Date: Thu, 14 Apr 2016 13:56:00 -0000
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Nathan Sidwell <nathan at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #45 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
I am no longer working on this, Richard appears to have the ball.
A patch to stop GC cause the constexpr machinery perturbing DECL_UID is
attached to https://gcc.gnu.org/ml/gcc-patches/2016-04/msg00607.html, but
currently deemed unnecessary.
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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++/70594] [6 Regression] -fcompare-debug failure
Date: Thu, 14 Apr 2016 13:58:00 -0000
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--- Comment #46 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
So, it seems the ctor BLOCKs are preserved, but others are removed.
So, with -g we get:
(gdb) p debug_generic_stmt (block_ultimate_origin ($29))
BLOCK #0
SUPERCONTEXT: assign
(gdb) p debug_generic_stmt (block_ultimate_origin ($29->block.supercontext))
assign
(gdb) p debug_generic_stmt (block_ultimate_origin
($29->block.supercontext->block.supercontext))
_M_set_length
(gdb) p debug_generic_stmt (block_ultimate_origin
($29->block.supercontext->block.supercontext->block.supercontext))
BLOCK #0
SUPERCONTEXT: basic_string
(gdb) p debug_generic_stmt (block_ultimate_origin
($29->block.supercontext->block.supercontext->block.supercontext->block.supercontext))
basic_string
and assign and _M_set_length are FUNCTION_DECLs which aren't cdtors.
while with -g0 we get for the same stmt:
(gdb) p debug_generic_stmt (block_ultimate_origin ($33))
BLOCK #0
SUPERCONTEXT: assign
(gdb) p debug_generic_stmt (block_ultimate_origin ($33->block.supercontext))
BLOCK #0
SUPERCONTEXT: basic_string
(gdb) p debug_generic_stmt (block_ultimate_origin
($33->block.supercontext->block.supercontext))
basic_string
$29 and $33 above are gimple_block (stmt).
This means for -g we have more rich BLOCK tree, with extra 2 BLOCKs in between,
which have sadly FUNCTION_DECL block_ultimate_origin.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/70650] [6 regression] bootstrap failure: ICE in emit_move_insn, at expr.c:3546
Date: Thu, 14 Apr 2016 14:06:00 -0000
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--- Comment #10 from Jack Howarth <howarth.at.gcc at gmail dot com> ---
(In reply to Jason Merrill from comment #8)
> Created attachment 38269 [details]
> patch
>
> This fixes the reduced testcase for me on sparc, does it fix bootstrap on
> the various targets?
The proposed patch doesn't solve the bootstrap failure on darwin.
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Subject: [Bug ipa/70646] [4.9/5/6 Regression] Corrupt truncated function
Date: Thu, 14 Apr 2016 14:20:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
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From: "wschmidt at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/70666] New: SLP vectorization opportunity to use load element + splat
Date: Thu, 14 Apr 2016 14:23:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70666
Bug ID: 70666
Summary: SLP vectorization opportunity to use load element +
splat
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: wschmidt at gcc dot gnu.org
CC: dje at gcc dot gnu.org, rguenth at gcc dot gnu.org
Target Milestone: ---
Target: powerpc*-unknown-linux-gnu
As discussed in PR70130, there is an opportunity to produce better code during
SLP vectorization for a vector load with a permutation vector where all
elements of the permutation are identical. A load of the desired element and a
splat would be better than current generated code, which makes use of unaligned
loads. See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70130#c23 for details,
and see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70130#c11 for a test case
that can be used to reproduce the pattern.
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Subject: [Bug bootstrap/70650] [6 regression] bootstrap failure: ICE in emit_move_insn, at expr.c:3546
Date: Thu, 14 Apr 2016 14:26:00 -0000
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--- Comment #11 from Jack Howarth <howarth.at.gcc at gmail dot com> ---
In case it helps, with the proposed patch, the backtrace from fancy_abort in
the failing string-inst.cc compilation on darwin appears as...
(lldb) bt
* thread #1: tid = 0x54d252, 0x00000001018798f3
cc1plus`fancy_abort(file="../../gcc-6-20160414/gcc/expr.c", line=3546,
function="emit_move_insn") + 19 at diagnostic.c:1329, queue =
'com.apple.main-thread', stop reason = breakpoint 1.1
* frame #0: 0x00000001018798f3
cc1plus`fancy_abort(file="../../gcc-6-20160414/gcc/expr.c", line=3546,
function="emit_move_insn") + 19 at diagnostic.c:1329
frame #1: 0x0000000100da030b cc1plus`emit_move_insn(x=0x000000010534cea0,
y=0x000000010534ce58) + 123 at expr.c:3545
frame #2: 0x0000000100dca4b0 cc1plus`emit_single_push_insn_1(mode=QImode,
x=0x000000010534ce58, type=0x00000001026b1dc8) + 656 at expr.c:4033
frame #3: 0x0000000100dab5e9 cc1plus`emit_single_push_insn(mode=QImode,
x=0x000000010534ce58, type=0x00000001026b1dc8) + 57 at expr.c:4045
frame #4: 0x0000000100dab1a7 cc1plus`emit_push_insn(x=0x000000010534ce58,
mode=QImode, type=0x00000001026b1dc8, size=0x0000000000000000, align=64,
partial=0, reg=0x0000000000000000, extra=0, args_addr=0x0000000000000000,
args_so_far=0x0000000144808480, reg_parm_stack_space=0,
alignment_pad=0x0000000144808480, sibcall_p=true) + 3815 at expr.c:4384
frame #5: 0x0000000100bc315c cc1plus`store_one_arg(arg=0x00007fff5fbfd750,
argblock=0x0000000000000000, flags=0, variable_size=0, reg_parm_stack_space=0)
+ 3036 at calls.c:4883
frame #6: 0x0000000100bbbf16 cc1plus`expand_call(exp=0x0000000105297b40,
target=0x0000000000000000, ignore=1) + 10550 at calls.c:3191
frame #7: 0x0000000100dbcb8f
cc1plus`expand_expr_real_1(exp=0x0000000105297b40, target=0x0000000000000000,
tmode=VOIDmode, modifier=EXPAND_NORMAL, alt_rtl=0x0000000000000000,
inner_reference_p=false) + 25647 at expr.c:10601
frame #8: 0x0000000100db4297
cc1plus`expand_expr_real(exp=0x0000000105297b40, target=0x0000000144808480,
tmode=VOIDmode, modifier=EXPAND_NORMAL, alt_rtl=0x0000000000000000,
inner_reference_p=false) + 215 at expr.c:7961
frame #9: 0x0000000100bf44d1 cc1plus`expand_expr(exp=0x0000000105297b40,
target=0x0000000144808480, mode=VOIDmode, modifier=EXPAND_NORMAL) + 49 at
expr.h:256
frame #10: 0x0000000100bf3a2e
cc1plus`expand_call_stmt(stmt=0x0000000104d79c78) + 2158 at cfgexpand.c:2661
frame #11: 0x0000000100bf051e
cc1plus`expand_gimple_stmt_1(stmt=0x0000000104d79c78) + 430 at cfgexpand.c:3549
frame #12: 0x0000000100bee523
cc1plus`expand_gimple_stmt(stmt=0x0000000104d79c78) + 131 at cfgexpand.c:3715
frame #13: 0x0000000100bef993
cc1plus`expand_gimple_tailcall(bb=0x0000000104fb7a28, stmt=0x0000000104d79c78,
can_fallthru=0x00007fff5fbff07f) + 35 at cfgexpand.c:3762
frame #14: 0x0000000100be7ff8
cc1plus`expand_gimple_basic_block(bb=0x0000000104fb7a28,
disable_tail_calls=false) + 4072 at cfgexpand.c:5698
frame #15: 0x0000000100be4e9a cc1plus`(anonymous
namespace)::pass_expand::execute(this=0x0000000143914260,
fun=0x0000000104d79738) + 4074 at cfgexpand.c:6345
frame #16: 0x00000001011eb28a
cc1plus`execute_one_pass(pass=0x0000000143914260) + 762 at passes.c:2336
frame #17: 0x00000001011ebdf7
cc1plus`execute_pass_list_1(pass=0x0000000143914260) + 103 at passes.c:2420
frame #18: 0x00000001011dcf6d
cc1plus`execute_pass_list(fn=0x0000000104d79738, pass=0x0000000143910de0) + 77
at passes.c:2431
frame #19: 0x0000000100c3c50c
cc1plus`cgraph_node::expand(this=0x0000000104989b80) + 540 at cgraphunit.c:1982
frame #20: 0x0000000100c4130a cc1plus`expand_all_functions() + 522 at
cgraphunit.c:2118
frame #21: 0x0000000100c4022e
cc1plus`symbol_table::compile(this=0x00000001448050a8) + 990 at
cgraphunit.c:2474
frame #22: 0x0000000100c414f9
cc1plus`symbol_table::finalize_compilation_unit(this=0x00000001448050a8) + 297
at cgraphunit.c:2564
frame #23: 0x0000000101338cd0 cc1plus`compile_file() + 224 at toplev.c:490
frame #24: 0x0000000101337318 cc1plus`do_compile() + 328 at toplev.c:1988
frame #25: 0x0000000101336d48 cc1plus`toplev::main(this=0x00007fff5fbff8a8,
argc=30, argv=0x00007fff5fbff8e8) + 376 at toplev.c:2096
frame #26: 0x000000010185fe20 cc1plus`main(argc=30,
argv=0x00007fff5fbff8e8) + 64 at main.c:39
frame #27: 0x00007fff862545ad libdyld.dylib`start + 1
frame #28: 0x00007fff862545ad libdyld.dylib`start + 1
(lldb)
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Subject: [Bug bootstrap/70650] [6 regression] bootstrap failure: ICE in emit_move_insn, at expr.c:3546
Date: Thu, 14 Apr 2016 14:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70650
--- Comment #12 from Jack Howarth <howarth.at.gcc at gmail dot com> ---
(In reply to Jakub Jelinek from comment #6)
> Shorter testcase:
> struct A {};
>
> void
> foo (struct A a, int b)
> {
> }
> compiles with sparc-solaris C, but doesn't with C++.
This test case doesn't trigger an ICE in the compiler on x86_64 darwin with or
without the proposed patch for the sparc bootstrap failure.
>From gcc-bugs-return-522205-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 14:51:08 2016
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Subject: [Bug tree-optimization/70130] [6 Regression] h264ref fails with verification error starting with r231674 (r224221 is the true start of the problem)
Date: Thu, 14 Apr 2016 14:51:00 -0000
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--- Comment #29 from Pat Haugen <pthaugen at gcc dot gnu.org> ---
Verified the patch also fixes the problem with h264ref benchmark.
>From gcc-bugs-return-522206-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 15:07:31 2016
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Subject: [Bug c++/70594] [6 Regression] -fcompare-debug failure
Date: Thu, 14 Apr 2016 15:07:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70594
--- Comment #47 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Ok, found one bug in the unused block pruning:
--- gcc/ipa-polymorphic-call.c.jj 2016-03-30 16:00:17.000000000 +0200
+++ gcc/ipa-polymorphic-call.c 2016-04-14 16:45:45.407754387 +0200
@@ -479,16 +479,12 @@ contains_type_p (tree outer_type, HOST_W
}
-/* Return a FUNCTION_DECL if BLOCK represents a constructor or destructor.
+/* Return a FUNCTION_DECL if FN represent a constructor or destructor.
If CHECK_CLONES is true, also check for clones of ctor/dtors. */
tree
-inlined_polymorphic_ctor_dtor_block_p (tree block, bool check_clones)
+polymorphic_ctor_dtor_p (tree fn, bool check_clones)
{
- tree fn = block_ultimate_origin (block);
- if (fn == NULL || TREE_CODE (fn) != FUNCTION_DECL)
- return NULL_TREE;
-
if (TREE_CODE (TREE_TYPE (fn)) != METHOD_TYPE
|| (!DECL_CXX_CONSTRUCTOR_P (fn) && !DECL_CXX_DESTRUCTOR_P (fn)))
{
@@ -510,6 +506,19 @@ inlined_polymorphic_ctor_dtor_block_p (t
return fn;
}
+/* Return a FUNCTION_DECL if BLOCK represents a constructor or destructor.
+ If CHECK_CLONES is true, also check for clones of ctor/dtors. */
+
+tree
+inlined_polymorphic_ctor_dtor_block_p (tree block, bool check_clones)
+{
+ tree fn = block_ultimate_origin (block);
+ if (fn == NULL || TREE_CODE (fn) != FUNCTION_DECL)
+ return NULL_TREE;
+
+ return polymorphic_ctor_dtor_p (fn, check_clones);
+}
+
/* We know that the instance is stored in variable or parameter
(not dynamically allocated) and we want to disprove the fact
--- gcc/ipa-utils.h.jj 2016-01-04 14:55:51.000000000 +0100
+++ gcc/ipa-utils.h 2016-04-14 16:46:08.828444152 +0200
@@ -70,6 +70,7 @@ void dump_possible_polymorphic_call_targ
bool possible_polymorphic_call_target_p (tree, HOST_WIDE_INT,
const ipa_polymorphic_call_context &,
struct cgraph_node *);
+tree polymorphic_ctor_dtor_p (tree, bool);
tree inlined_polymorphic_ctor_dtor_block_p (tree, bool);
bool decl_maybe_in_construction_p (tree, tree, gimple *, tree);
tree vtable_pointer_value_to_binfo (const_tree);
--- gcc/tree-ssa-live.c.jj 2016-01-04 14:55:51.000000000 +0100
+++ gcc/tree-ssa-live.c 2016-04-14 16:47:33.343324654 +0200
@@ -855,7 +855,9 @@ remove_unused_locals (void)
cfun->local_decls->truncate (dstidx);
}
- remove_unused_scope_block_p (DECL_INITIAL (current_function_decl), false);
+ remove_unused_scope_block_p (DECL_INITIAL (current_function_decl),
+ polymorphic_ctor_dtor_p (current_function_decl,
+ true) != NULL_TREE);
clear_unused_block_pointer ();
BITMAP_FREE (usedvars);
but sadly this still doesn't fix it (though, fixes at least the first case
where we nuke the needed BLOCK).
>From gcc-bugs-return-522207-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 15:14:34 2016
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Subject: [Bug bootstrap/70650] [6 regression] bootstrap failure: ICE in emit_move_insn, at expr.c:3546
Date: Thu, 14 Apr 2016 15:14:00 -0000
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--- Comment #13 from Jason Merrill <jason at gcc dot gnu.org> ---
The darwin problem is with an ipa-icf thunk trying to pass the parameter on
directly, which breaks because it's using the parameter's TREE_TYPE rather than
DECL_ARG_TYPE. expand_call handles this transparently for integral promotions
by way of promote_function_mode, but doesn't know how to do the equivalent
here. This is a significant problem with trying to handle this transition in
the front end rather than the back end (as H.J.'s patch did).
>From gcc-bugs-return-522208-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 15:23:42 2016
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Subject: [Bug bootstrap/70650] [6 regression] bootstrap failure: ICE in emit_move_insn, at expr.c:3546
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--- Comment #14 from Jack Howarth <howarth.at.gcc at gmail dot com> ---
(In reply to Jason Merrill from comment #13)
Is darwin the only target using TREE_TYPE rather than DECL_ARG_TYPE?
>From gcc-bugs-return-522209-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 15:44:28 2016
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Subject: [Bug c++/70594] [6 Regression] -fcompare-debug failure
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--- Comment #48 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 38271
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38271&action=edit
gcc6-pr70594.patch
Untested fix.
So the other issue is that noncall_stmt_may_be_vtbl_ptr_store looks for BLOCKs
with block_ultimate_origin of FUNCTION_DECL (which is correct), and
tree-ssa-live.c was doing that too for finding the cdtor BLOCKs (through
inlined_polymorphic_ctor_dtor_block_p), but only looked if
BLOCK_ABSTRACT_ORIGIN is FUNCTION_DECL inside of those blocks, which is wrong,
that is just subset of what block_ultimate_origin returns.
As for the changes I've mentioned in the previous comment already and that are
included in this patch too, the thing is that while the pruning code works
(except for the above mentioned thing) right when we have a cdtor inlined and
some other function inlined into it, we can actually lose the needed BLOCKs
already earlier, when pruning unused BLOCKs inside of the cdtor itself before
it is inlined - then we also have to avoid pruning the BLOCKs with
FUNCTION_DECL ultimate origins (except we of course can prune such blocks
inside of BLOCKs with FUNCTION_DECL ultimate origins), thus we need to start
with the right value of the is_ctor_dtor_block flag - DECL_INITIAL
(current_function_block) usually doesn't have block_ultimate_origin a
FUNCTION_DECL and even if it does, it is not current_function_decl - only
BLOCK_SUPERCONTEXT (DECL_INITIAL (current_function_decl)) is
current_function_decl.
This patch fixes the -fcompare-debug issue on the Tobias' testcase.
>From gcc-bugs-return-522211-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 15:53:43 2016
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Subject: [Bug c/70651] [6 Regression] ICE on valid code on x86_64-linux-gnu in build_va_arg, at c-family/c-common.c:5728
Date: Thu, 14 Apr 2016 15:53:00 -0000
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Yeah, the assertions are clearly bogus.
Though perhaps it would be better to just error out at those spots instead of
ignoring it and hoping we'll error out later.
>From gcc-bugs-return-522210-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 15:53:43 2016
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Subject: [Bug bootstrap/70650] [6 regression] bootstrap failure: ICE in emit_move_insn, at expr.c:3546
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--- Comment #15 from Jason Merrill <jason at gcc dot gnu.org> ---
(In reply to Jack Howarth from comment #14)
> (In reply to Jason Merrill from comment #13)
> Is darwin the only target using TREE_TYPE rather than DECL_ARG_TYPE?
No, that should be the same for all targets; I don't know why this would affect
darwin and not linux.
>From gcc-bugs-return-522212-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 16:11:31 2016
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Subject: [Bug c++/70649] [6 Regression] Incorrect C++ warning on zero-sized array passing
Date: Thu, 14 Apr 2016 16:11:00 -0000
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--- Comment #1 from Jason Merrill <jason at gcc dot gnu.org> ---
Created attachment 38272
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38272&action=edit
fix
>From gcc-bugs-return-522213-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 16:24:50 2016
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Subject: [Bug bootstrap/70650] [6 regression] bootstrap failure: ICE in emit_move_insn, at expr.c:3546
Date: Thu, 14 Apr 2016 16:24:00 -0000
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Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #16 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed by reverting the abi change.
>From gcc-bugs-return-522214-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 16:25:06 2016
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Subject: [Bug c++/70649] [6 Regression] Incorrect C++ warning on zero-sized array passing
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Jason Merrill <jason at gcc dot gnu.org> changed:
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--- Comment #2 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed by reverting the ABI change.
>From gcc-bugs-return-522215-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 16:31:57 2016
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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++/70667] New: SFINAE error disambiguating using alignas
Date: Thu, 14 Apr 2016 16:31:00 -0000
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Bug ID: 70667
Summary: SFINAE error disambiguating using alignas
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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Target Milestone: ---
The following program tries to use SFINAE to determine whether a non-type
template argument N is a valid alignment. It depends on overload resolution to
choose between two overloads of function template f, only one of which is valid
for the given value of N. Since the first overload isn't viable (3 is not a
valid alignment because it isn't a non-negative power of 2), the second
overload is expected to be selected. But instead, GCC fails with an error.
$ cat u.c && g++ -S -Wall -Wextra -Wpedantic -xc++ u.c
template <int N> struct A { alignas (N) int a; };
template <int N> struct B { char c; };
template <int N> int f (int (*)[sizeof (A<N>)]) { return 0; }
template <int N> int f (int (*)[sizeof (B<N>)]) { return 1; }
int i = f<3>();
u.c: In instantiation of ‘struct A<3>’:
u.c:4:40: required by substitution of ‘template<int N> int f(int (*)[sizeof
(A<N>)]) [with int N = 3]’
u.c:7:14: required from here
u.c:1:45: error: requested alignment is not a positive power of 2
template <int N> struct A { alignas (N) int a; };
^
u.c:7:14: error: no matching function for call to ‘f()’
int i = f<3>();
^
u.c:4:22: note: candidate: template<int N> int f(int (*)[sizeof (A<N>)])
template <int N> int f (int (*)[sizeof (A<N>)]) { return 0; }
^
u.c:4:22: note: substitution of deduced template arguments resulted in errors
seen above
u.c:5:22: note: candidate: template<int N> int f(int (*)[sizeof (B<N>)])
template <int N> int f (int (*)[sizeof (B<N>)]) { return 1; }
^
u.c:5:22: note: template argument deduction/substitution failed:
u.c:7:14: note: candidate expects 1 argument, 0 provided
int i = f<3>();
^
>From gcc-bugs-return-522216-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 16:52:03 2016
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Subject: [Bug c++/70029] [6 Regression] ICE with C++11 and -flto
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--- Comment #9 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Thu Apr 14 16:51:16 2016
New Revision: 234979
URL: https://gcc.gnu.org/viewcvs?rev=234979&root=gcc&view=rev
Log:
PR c++/70029
* tree.c (verify_type): Disable the canonical type of main variant
check.
* g++.dg/torture/pr70029.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/torture/pr70029.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree.c
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Subject: [Bug c++/70029] [7 Regression] ICE with C++11 and -flto
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|6.0 |7.0
Summary|[6 Regression] ICE with |[7 Regression] ICE with
|C++11 and -flto |C++11 and -flto
--- Comment #10 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Resolved for GCC 6 by disabling the check; leaving this open for a proper
solution in GCC 7.
>From gcc-bugs-return-522218-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 17:07:55 2016
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Subject: [Bug c++/70648] [6 Regression] adplug-xmms fails to compile
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----------------------------------------------------------------------------
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>From gcc-bugs-return-522219-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 17:12:59 2016
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Subject: [Bug c++/70543] [6 Regression] wrong non-const error for enable_if and constexpr function
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----------------------------------------------------------------------------
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Subject: [Bug bootstrap/70652] [6 Regression] r234966 causes bootstrap to fail
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70652
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |msebor at gcc dot gnu.org
Known to fail| |6.0
--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
The change (r234966) resolves a regression (bug 69517) in how C++ VLAs
initialized with excess elements are handled: by throwing an exception in GCC
4.9, and by allowing the program to crash in 5 and 6.
Jakub and Jason agreed in an IRC discussion that due to the reported problem
and the proximity of GCC 6 release date the change should be backed out and
resubmitted in stage 1 for GCC 7. I'll take care of it.
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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/70650] [6 regression] bootstrap failure: ICE in emit_move_insn, at expr.c:3546
Date: Thu, 14 Apr 2016 17:25:00 -0000
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--- Comment #17 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> --- Comment #8 from Jason Merrill <jason at gcc dot gnu.org> ---
[...]
> This fixes the reduced testcase for me on sparc, does it fix bootstrap on the
> various targets?
Just for the record, with your patch a sparc-sun-solaris2.12 bootstrap
is well into stage2, so the immediate failure is gone. Will be a couple
more hours before I have testsuite results.
Rainer
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Subject: [Bug c/70668] New: nds32-elf toolchain fails to compile on OSX"
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Bug ID: 70668
Summary: nds32-elf toolchain fails to compile on OSX"
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--- Comment #1 from Stefan Reinauer <stefan.reinauer at coreboot dot org> ---
Created attachment 38273
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38273&action=edit
minimal example
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Subject: [Bug bootstrap/70652] [6 Regression] r234966 causes bootstrap to fail
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--- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Thu Apr 14 17:35:23 2016
New Revision: 234981
URL: https://gcc.gnu.org/viewcvs?rev=234981&root=gcc&view=rev
Log:
PR c++/70652 - [6 Regression] r234966 causes bootstrap to fail
Revert patch for c++/69517, c++/70019, and c++/70588.
Removed:
trunk/gcc/testsuite/g++.dg/cpp1y/vla12.C
trunk/gcc/testsuite/g++.dg/cpp1y/vla13.C
trunk/gcc/testsuite/g++.dg/cpp1y/vla14.C
trunk/gcc/testsuite/g++.dg/cpp1y/vla3.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/cp-tree.h
trunk/gcc/cp/decl.c
trunk/gcc/cp/init.c
trunk/gcc/cp/typeck2.c
trunk/gcc/doc/extend.texi
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/c-c++-common/ubsan/vla-1.c
trunk/gcc/testsuite/g++.dg/init/array24.C
trunk/gcc/testsuite/g++.dg/ubsan/vla-1.C
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Subject: [Bug c/70668] nds32-elf toolchain fails to compile on OSX"
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Stefan Reinauer <stefan.reinauer at coreboot dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |nds32le-elf
Host| |Darwin 15.4.0
--- Comment #2 from Stefan Reinauer <stefan.reinauer at coreboot dot org> ---
The environment is Mac OS X El Capitan (Darwin 15.4.0)
cross compiler build for nds32le-elf fails when building libgcc.
So far, I tracked the issue down to cc1 crashing when compiling divfs3.c (or
even the attached minimized example of it)
------------- 8< -------------------------- 8< -------------------
./build-nds32le-elf-GCC/gcc/cc1 divsf3.c
__divsf3
Analyzing compilation unit
Performing interprocedural optimizations
<*free_lang_data> <visibility> <build_ssa_passes> <opt_local_passes>
<free-inline-summary> <emutls> <whole-program> <inline>Assembling functions:
__divsf3Abort trap: 6
------------- 8< -------------------------- 8< -------------------
Debugger output:
------------- 8< -------------------------- 8< -------------------
lldb ./build-nds32le-elf-GCC/gcc/cc1
(lldb) target create "./build-nds32le-elf-GCC/gcc/cc1"
Current executable set to './build-nds32le-elf-GCC/gcc/cc1' (x86_64).
(lldb) run divsf3.c
Process 45989 launched: './build-nds32le-elf-GCC/gcc/cc1' (x86_64)
__divsf3
Analyzing compilation unit
Performing interprocedural optimizations
<*free_lang_data> <visibility> <build_ssa_passes> <opt_local_passes>
<free-inline-summary> <emutls> <whole-program> <inline>Assembling functions:
__divsf3Process 45989 stopped
* thread #1: tid = 0x5c6719, 0x00007fff9ee20f06
libsystem_kernel.dylib`__pthread_kill + 10, queue = 'com.apple.main-thread',
stop reason = signal SIGABRT
frame #0: 0x00007fff9ee20f06 libsystem_kernel.dylib`__pthread_kill + 10
libsystem_kernel.dylib`__pthread_kill:
-> 0x7fff9ee20f06 <+10>: jae 0x7fff9ee20f10 ; <+20>
0x7fff9ee20f08 <+12>: movq %rax, %rdi
0x7fff9ee20f0b <+15>: jmp 0x7fff9ee1b7cd ; cerror_nocancel
0x7fff9ee20f10 <+20>: retq
(lldb) bt
* thread #1: tid = 0x5c6719, 0x00007fff9ee20f06
libsystem_kernel.dylib`__pthread_kill + 10, queue = 'com.apple.main-thread',
stop reason = signal SIGABRT
* frame #0: 0x00007fff9ee20f06 libsystem_kernel.dylib`__pthread_kill + 10
frame #1: 0x00007fff9bf0f4ec libsystem_pthread.dylib`pthread_kill + 90
frame #2: 0x00007fff98512787 libsystem_c.dylib`__abort + 145
frame #3: 0x00007fff98513066 libsystem_c.dylib`__stack_chk_fail + 200
frame #4: 0x00000001001198d8 cc1`gen_casesi(rtx_def*, rtx_def*, rtx_def*,
rtx_def*, rtx_def*) + 392
frame #5: 0x00000001006a69bc cc1`insn_gen_fn::operator()(rtx_def*,
rtx_def*, rtx_def*, rtx_def*, rtx_def*) const + 76
frame #6: 0x0000000100697b09 cc1`maybe_gen_insn(insn_code, unsigned int,
expand_operand*) + 473
frame #7: 0x00000001006a4001 cc1`maybe_expand_jump_insn(insn_code, unsigned
int, expand_operand*) + 33
frame #8: 0x0000000100699481 cc1`expand_jump_insn(insn_code, unsigned int,
expand_operand*) + 33
frame #9: 0x0000000100353f20 cc1`try_casesi(tree_node*, tree_node*,
tree_node*, tree_node*, rtx_def*, rtx_def*, rtx_def*, int) + 864
frame #10: 0x00000001007c0ee9 cc1`emit_case_dispatch_table(tree_node*,
tree_node*, case_node*, rtx_def*, tree_node*, tree_node*, tree_node*,
basic_block_def*) + 313
frame #11: 0x00000001007c07aa cc1`expand_case(gswitch*) + 1290
frame #12: 0x00000001001c04b2
cc1`expand_gimple_stmt_1(gimple_statement_base*) + 386
frame #13: 0x00000001001beba3
cc1`expand_gimple_stmt(gimple_statement_base*) + 131
frame #14: 0x00000001001b989b
cc1`expand_gimple_basic_block(basic_block_def*, bool) + 3803
frame #15: 0x00000001001b6bef cc1`(anonymous
namespace)::pass_expand::execute(function*) + 3199
frame #16: 0x00000001006c67b1 cc1`execute_one_pass(opt_pass*) + 721
frame #17: 0x00000001006c709e cc1`execute_pass_list_1(opt_pass*) + 78
frame #18: 0x00000001006b9732 cc1`execute_pass_list(function*, opt_pass*) +
34
frame #19: 0x00000001002008dd cc1`cgraph_node::expand() + 365
frame #20: 0x0000000100203f45 cc1`output_in_order(bool) + 917
frame #21: 0x00000001002035d2 cc1`symbol_table::compile() + 642
frame #22: 0x0000000100204363 cc1`symbol_table::finalize_compilation_unit()
+ 179
frame #23: 0x000000010001c67a cc1`c_write_global_declarations() + 474
frame #24: 0x00000001007d9c47 cc1`compile_file() + 167
frame #25: 0x00000001007d8438 cc1`do_compile() + 328
frame #26: 0x00000001007d7e83 cc1`toplev::main(int, char**) + 371
frame #27: 0x0000000100b3dbeb cc1`main + 59
frame #28: 0x00007fff90a6b5ad libdyld.dylib`start + 1
frame #29: 0x00007fff90a6b5ad libdyld.dylib`start + 1
(lldb)
------------- 8< -------------------------- 8< -------------------
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From: "stefan.reinauer at coreboot dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/70668] nds32-elf toolchain fails to compile on OSX
Date: Thu, 14 Apr 2016 17:52:00 -0000
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Stefan Reinauer <stefan.reinauer at coreboot dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|nds32-elf toolchain fails |nds32-elf toolchain fails
|to compile on OSX" |to compile on OSX
--- Comment #3 from Stefan Reinauer <stefan.reinauer at coreboot dot org> ---
Also, I have found out that passing -fno-jump-tables to the compiler call fixes
the issue.
Interestingly enough, I have built cross toolchains on OS X for i386-elf,
x86_64-elf, arm-eabi, aarch64-elf, powerpc64-linux-gnu, mipsel-elf (and riscv
with a local patch)
and only nds32le-elf is crashing.
So, while the same script does not crash on Ubuntu 15.10 compiling a
nds32le-elf cross toolchain, it seems it's rather a problem that happens to be
exposed on OS X than a problem with OS X.
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Subject: [Bug preprocessor/69650] [6 Regression] ICE in linemap_line_start, at libcpp/line-map.c:803
Date: Thu, 14 Apr 2016 17:55:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69650
--- Comment #60 from Roger Orr <rogero at howzatt dot demon.co.uk> ---
Thanks; I can now confirm that a full build of our application with distcc
works without problems.
>From gcc-bugs-return-522228-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 18:00:33 2016
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From: "waleed-rider at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70653] bubble sorting algorithm fail to run on the compiler giving a bug in it
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--- Comment #2 from waleed <waleed-rider at hotmail dot com> ---
can you recommend me which tool we should use for bug tracking
> From: gcc-bugzilla@gcc.gnu.org
> To: waleed-rider@hotmail.com
> Subject: [Bug c++/70653] bubble sorting algorithm fail to run on the compiler giving a bug in it
> Date: Thu, 14 Apr 2016 08:33:25 +0000
>
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70653
>
> Richard Biener <rguenth at gcc dot gnu.org> changed:
>
> What |Removed |Added
> ----------------------------------------------------------------------------
> Status|UNCONFIRMED |RESOLVED
> Resolution|--- |INVALID
>
> --- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
> we're not a tool to find bugs in your code
>
> --
> You are receiving this mail because:
> You reported the bug.
=
>From gcc-bugs-return-522229-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 18:44:18 2016
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From: "meissner at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70669] New: PowerPC __float128 does not support direct move
Date: Thu, 14 Apr 2016 18:44:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70669
Bug ID: 70669
Summary: PowerPC __float128 does not support direct move
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: meissner at gcc dot gnu.org
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KFmode (i.e. __float128) does not have reload handlers to allow the compiler to
do a direct move operation to move the values between GPRs and vector registers
in a few instructions. Instead it needs to do a store and load to copy the
values.
The function rs6000_init_hard_regno_mode_ok should set
reg_addr[KFmode].reload_gpr_vsx and reg_addr[KFmode].reload_vsx_gpr to the
reload handlers.
>From gcc-bugs-return-522230-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 18:45:35 2016
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Subject: [Bug target/70669] PowerPC __float128 does not support direct move
Date: Thu, 14 Apr 2016 18:45:00 -0000
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Michael Meissner <meissner at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |powerpc64le-unknown-linux-g
| |nu
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2016-04-14
CC| |dje at gcc dot gnu.org,
| |wschmidt at gcc dot gnu.org
Host| |powerpc64le-unknown-linux-g
| |nu
Assignee|unassigned at gcc dot gnu.org |meissner at gcc dot gnu.org
Ever confirmed|0 |1
Build| |powerpc64le-unknown-linux-g
| |nu
>From gcc-bugs-return-522231-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 18:51:53 2016
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From: "meissner at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70670] New: Duplicate code in rs6000_secondary_reload_direct_move in rs6000.c
Date: Thu, 14 Apr 2016 18:51:00 -0000
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Bug ID: 70670
Summary: Duplicate code in rs6000_secondary_reload_direct_move
in rs6000.c
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
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In tracking down the bug in 70669, I noticed that
rs6000_secondary_reload_direct_move has duplicated code.
The code looks like:
if (TARGET_POWERPC64)
{
if (size == 16)
{
// ...
}
else if (mode == SFmode)
{
// ...
}
}
if (TARGET_POWERPC64 && size == 16)
{
// ...
}
Where the code in the second if is identical to the code in the first if if the
size is 16 bytes.
>From gcc-bugs-return-522232-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 18:53:45 2016
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Subject: [Bug target/70670] Duplicate code in rs6000_secondary_reload_direct_move in rs6000.c
Date: Thu, 14 Apr 2016 18:53:00 -0000
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Michael Meissner <meissner at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |powerpc64le-unknown-linux-g
| |nu
Priority|P3 |P4
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2016-04-14
CC| |dje at gcc dot gnu.org,
| |wschmidt at gcc dot gnu.org
Host| |powerpc64le-unknown-linux-g
| |nu
Assignee|unassigned at gcc dot gnu.org |meissner at gcc dot gnu.org
Ever confirmed|0 |1
Build| |powerpc64le-unknown-linux-g
| |nu
--- Comment #1 from Michael Meissner <meissner at gcc dot gnu.org> ---
While this is harmless, it probably should be fixed some day.
>From gcc-bugs-return-522233-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 18:57:53 2016
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From: "jpoimboe at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/70646] [4.9/5/6 Regression] Corrupt truncated function
Date: Thu, 14 Apr 2016 18:57:00 -0000
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--- Comment #13 from Josh Poimboeuf <jpoimboe at redhat dot com> ---
So if I understand correctly, some reachable code is incorrectly getting marked
unreachable and then getting discarded.
Interestingly, the function's epilogue (frame pointer restore) and return
instruction are also getting discarded. Can you tell if that will always be
the case when this bug triggers?
If so, that should make it possible for objtool to reliably detect the bug.
>From gcc-bugs-return-522234-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 19:16:05 2016
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From: "ch3root at openwall dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/70671] New: Wrong column number shown for "error: cannot take address of bit-field"
Date: Thu, 14 Apr 2016 19:16:00 -0000
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Bug ID: 70671
Summary: Wrong column number shown for "error: cannot take
address of bit-field"
Product: gcc
Version: 6.0
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When compiling this program:
int main()
{
struct { int x:2; } s;
12345; &s.x;
}
I get the following error message:
$ gcc example.c
example.c: In function ‘main’:
example.c:4:3: error: cannot take address of bit-field ‘x’
12345; &s.x;
^~~~~
The column number is wrong.
>From gcc-bugs-return-522235-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 19:21:28 2016
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Subject: [Bug bootstrap/70652] [6 Regression] r234966 causes bootstrap to fail
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70652
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #6 from Martin Sebor <msebor at gcc dot gnu.org> ---
Commit r234981 reverts the change and restores the Java bootstrap (verified on
x86_64-linux).
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Subject: [Bug c++/70594] [6 Regression] -fcompare-debug failure
Date: Thu, 14 Apr 2016 19:22:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70594
--- Comment #49 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Apr 14 19:21:31 2016
New Revision: 234987
URL: https://gcc.gnu.org/viewcvs?rev=234987&root=gcc&view=rev
Log:
PR c++/70594
* ipa-utils.h (polymorphic_ctor_dtor_p): New prototype.
* ipa-polymorphic-call.c (polymorphic_ctor_dtor_p): New function.
(inlined_polymorphic_ctor_dtor_block_p): Use it.
* tree-ssa-live.c (remove_unused_scope_block_p): When
in_ctor_dtor_block, avoid discarding not just BLOCKs with
BLOCK_ABSTRACT_ORIGIN being FUNCTION_DECL, but even when
block_ultimate_origin is FUNCTION_DECL.
(remove_unused_locals): If current_function_decl is
polymorphic_ctor_dtor_p, pass initial true to
remove_unused_scope_block_p' is_ctor_dtor_block.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/ipa-polymorphic-call.c
trunk/gcc/ipa-utils.h
trunk/gcc/tree-ssa-live.c
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Subject: [Bug c++/70594] [6 Regression] -fcompare-debug failure
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #50 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Should be fixed now. If there are further -fcompare-debug issues, please open
a new PR.
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Subject: [Bug target/70640] IEEE 128-bit floating point negative/abs has two thinkos
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--- Comment #4 from Michael Meissner <meissner at gcc dot gnu.org> ---
Author: meissner
Date: Thu Apr 14 20:05:58 2016
New Revision: 234988
URL: https://gcc.gnu.org/viewcvs?rev=234988&root=gcc&view=rev
Log:
2016-04-14 Michael Meissner <meissner@linux.vnet.ibm.com>
PR target/70640
* gcc.target/powerpc/pr70640.c: Fix test so it correctly works on
a power7 system that does not have an assembler that supports
power8.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.target/powerpc/pr70640.c
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Subject: [Bug target/70640] IEEE 128-bit floating point negative/abs has two thinkos
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Michael Meissner <meissner at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #5 from Michael Meissner <meissner at gcc dot gnu.org> ---
After I applied the fix for PR 70640, one the regression testers reported the
test as an error. This system is a power7 system that does not have an
asembler that understands the power8/power9 instructions. This means that
-mcpu=power8 will only generate power7 code.
The difference for this test is that on power7, it generates a vspltisw
instruciton to create a register with all 1's set, while on power8 it generates
xxlorc instead (vspltisw is restricted to the Altivec registers, while xxlorc
can target all VSX registers, so it is preferred for power8 code).
Test case updated in subversion id 234988.
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Subject: [Bug c++/70622] [6 Regression] auto specifier don't deduce value type and its pointer type within single declaration.
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Jason Merrill <jason at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug c++/70543] [6 Regression] wrong non-const error for enable_if and constexpr function
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--- Comment #5 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Thu Apr 14 20:14:44 2016
New Revision: 234990
URL: https://gcc.gnu.org/viewcvs?rev=234990&root=gcc&view=rev
Log:
PR c++/70543
* pt.c (value_dependent_expression_p) [VAR_DECL]: A type-dependent
initializer also makes the variable value-dependent.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-template9.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/pt.c
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Subject: [Bug c++/70622] [6 Regression] auto specifier don't deduce value type and its pointer type within single declaration.
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--- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Thu Apr 14 20:14:49 2016
New Revision: 234991
URL: https://gcc.gnu.org/viewcvs?rev=234991&root=gcc&view=rev
Log:
PR c++/70622
* parser.c (cp_parser_init_declarator): Add auto_result parm.
(cp_parser_simple_declaration): Pass it.
(strip_declarator_types): New.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/auto47.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/parser.c
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Subject: [Bug c++/70648] [6 Regression] adplug-xmms fails to compile
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Jason Merrill <jason at gcc dot gnu.org> changed:
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Fixed.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70543
Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Thu Apr 14 20:14:44 2016
New Revision: 234990
URL: https://gcc.gnu.org/viewcvs?rev=234990&root=gcc&view=rev
Log:
PR c++/70543
* pt.c (value_dependent_expression_p) [VAR_DECL]: A type-dependent
initializer also makes the variable value-dependent.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-template9.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/pt.c
--- Comment #6 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug c++/70543] [6 Regression] wrong non-const error for enable_if and constexpr function
Date: Thu, 14 Apr 2016 20:15:00 -0000
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Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #6 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug c++/70648] [6 Regression] adplug-xmms fails to compile
Date: Thu, 14 Apr 2016 20:15:00 -0000
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--- Comment #1 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Thu Apr 14 20:14:38 2016
New Revision: 234989
URL: https://gcc.gnu.org/viewcvs?rev=234989&root=gcc&view=rev
Log:
PR c++/70648
* constexpr.c (cxx_eval_store_expression): Also copy
CONSTRUCTOR_NO_IMPLICIT_ZERO.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-initlist10.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/constexpr.c
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Subject: [Bug target/70672] New: [5] Wrong code for little endian bitfield modification
Date: Thu, 14 Apr 2016 20:27:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70672
Bug ID: 70672
Summary: [5] Wrong code for little endian bitfield modification
Product: gcc
Version: 5.3.1
Status: UNCONFIRMED
Keywords: wrong-code
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: wschmidt at gcc dot gnu.org
CC: dje at gcc dot gnu.org, segher at gcc dot gnu.org
Target Milestone: ---
Target: powerpc64le-unknown-linux-gnu
The following code compiled with -O2 with GCC 5.3 produces incorrect code.
Correct code is generated for current trunk.
typedef unsigned long long CoreUInt64;
typedef unsigned int CoreUInt32;
CoreUInt64 shift4BtUp(CoreUInt64 a)
{
struct Int32S
{
CoreUInt32 highTop;
CoreUInt32 lowTop;
};
union
{
struct Int32S _32store;
CoreUInt64 _64store;
} x;
x._64store = a;
x._32store.lowTop = x._32store.highTop;
x._32store.highTop = 0;
return x._64store;
}
The correct code is a 32-bit left shift on little endian, and indeed trunk
produces sldi 3,3,32 as expected. But on 5.3 we get rldicr 3,3,0,31.
After expand:
;; x._64store = a_2(D);
(insn 6 5 0 (set (reg/v:DI 125 [ x ])
(reg/v:DI 127 [ a ])) sap.c:19 -1
(nil))
;; x._32store.lowTop = _4;
(insn 7 6 0 (set (zero_extract:DI (reg/v:DI 125 [ x ])
(const_int 32 [0x20])
(const_int 0 [0]))
(reg/v:DI 125 [ x ])) sap.c:21 -1
(nil))
;; x._32store.highTop = 0;
(insn 8 7 9 (set (reg:DI 128)
(const_int 0 [0])) sap.c:22 -1
(nil))
(insn 9 8 0 (set (zero_extract:DI (reg/v:DI 125 [ x ])
(const_int 32 [0x20])
(const_int 32 [0x20]))
(reg:DI 128)) sap.c:22 -1
(nil))
;; _7 = x._64store;
(insn 10 9 0 (set (reg:DI 124 [ D.2241 ])
(reg/v:DI 125 [ x ])) sap.c:24 -1
(nil))
This is correct. But then, following the first jump optimization pass, insn 7
is incorrectly removed.
I bisected the fix on trunk to r226005, in which Segher did a complete rewrite
of much of the rotate code. Unfortunately this is a relatively large patch, so
it isn't immediately obvious where the original problem was. There must have
been a hidden endianness assumption in there somewhere.
If it's acceptable, it would be nice to backport the whole patch, but I am not
sure whether there were follow-on patches to deal with any fallout. Certainly
this has had a lot of burn-in time by now.
Segher, can you please advise? Do you recall seeing a bug like this when you
were working on this last year?
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Subject: [Bug target/70672] [5] Wrong code for little endian bitfield modification
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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> ---
Note that the patch had at least one follow-up.
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Subject: [Bug c++/69517] [5/6 regression] SEGV on a VLA with excess initializer elements
Date: Thu, 14 Apr 2016 20:43:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[5 regression] SEGV on a |[5/6 regression] SEGV on a
|VLA with excess initializer |VLA with excess initializer
|elements |elements
--- Comment #11 from Martin Sebor <msebor at gcc dot gnu.org> ---
Restoring 6 regression since the fix was reverted due to bug 70652.
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Subject: [Bug c++/16994] [meta-bug] VLA and C++
Date: Thu, 14 Apr 2016 20:44:00 -0000
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Bug 16994 depends on bug 70019, which changed state.
Bug 70019 Summary: VLA size overflow not detected
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70019
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Resolution|FIXED |---
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Subject: [Bug c++/70019] VLA size overflow not detected
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Resolution|FIXED |---
--- Comment #6 from Martin Sebor <msebor at gcc dot gnu.org> ---
Reopening since the fix was reverted due to bug 70652.
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Subject: [Bug c++/70588] SIGBUS on a VLA larger than SIZE_MAX / 2
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Resolution|FIXED |---
--- Comment #9 from Martin Sebor <msebor at gcc dot gnu.org> ---
Reopening since the fix was reverted due to bug 70652.
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Subject: [Bug c++/16994] [meta-bug] VLA and C++
Date: Thu, 14 Apr 2016 20:45:00 -0000
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Bug 16994 depends on bug 70588, which changed state.
Bug 70588 Summary: SIGBUS on a VLA larger than SIZE_MAX / 2
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70588
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----------------------------------------------------------------------------
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Subject: [Bug c++/69517] [7 regression] SEGV on a VLA with excess initializer elements
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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|5.4 |7.0
Summary|[5/6 regression] SEGV on a |[7 regression] SEGV on a
|VLA with excess initializer |VLA with excess initializer
|elements |elements
--- Comment #12 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Retargetting at GCC 7.
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Subject: [Bug c++/70528] [5/6 Regression] bogus error: constructor required before non-static data member
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Jason Merrill <jason at gcc dot gnu.org> changed:
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>From gcc-bugs-return-522256-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 21:23:10 2016
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Subject: [Bug bootstrap/70652] [6 Regression] r234966 causes bootstrap to fail
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--- Comment #7 from Martin Sebor <msebor at gcc dot gnu.org> ---
Created attachment 38274
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38274&action=edit
Patch to replace C++ VLAs with alloca.
For future reference, the attached patch gets around the problem by replacing
C++ VLAs in libjava with __builtin_alloca(). libjava already uses
__builtin_alloca() so the change would be in line with this practice. At the
same time, libjava contains C++ throw statements so it seems that it must
already link with libsupc++ which provides the required C++ exception support,
including the unresolved __cxa_throw_bad_array_length function, so there may be
a better solution to the problem than replacing the safer VLAs with the unsafe
builtin.
>From gcc-bugs-return-522257-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 21:51:13 2016
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From: "lopezibanez at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70647] Feature request: warning for self-moving in constructors
Date: Thu, 14 Apr 2016 21:51:00 -0000
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--- Comment #3 from Manuel López-Ibáñez <lopezibanez at gmail dot com> ---
> --- Comment #2 from Matt Godbolt <matt at godbolt dot org> ---
> Thanks Manuel. Interestingly this does elicit a warning:
>
> struct B {
> int a; int b;
> B(B &&o)
> : a(static_cast<int>(a)),
> b(std::move(o.b)) {}
> };
Most probable, the FE removes the cast before reaching this warning, so the
warning does not see an expression. If you cast to something non trivial,
it remains an expression and the warning doesn't try to look inside it.
I wonder what happens if you do a(b), a(a). Does it still warn? My guess
would be yes. If so, it is just checking for equality on both sides, no
attempt to look within expressions nor track initialisation.
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Subject: [Bug c/65083] Can not indirectly call some C11 atomic library functions
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Chris Quenelle <chris.quenelle at oracle dot com> changed:
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----------------------------------------------------------------------------
CC| |chris.quenelle at oracle dot com
--- Comment #5 from Chris Quenelle <chris.quenelle at oracle dot com> ---
How hard would it be for someone to backport this to an earlier gcc release?
Could we cherry pick this backwards for a Solaris update if we wanted to, or
does it depend on other GCC 6 changes?
>From gcc-bugs-return-522259-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 22:05:44 2016
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From: "matt at godbolt dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70647] Feature request: warning for self-moving in constructors
Date: Thu, 14 Apr 2016 22:05:00 -0000
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--- Comment #4 from Matt Godbolt <matt at godbolt dot org> ---
Agreed re: cast/FE.
I couldn't quite get your example to fail as the "o" parameter is unusued
(which would be a good clue!
#include <utility> // for std::move
struct B {
int a; int b;
B(B &&o)
: a(b),
b(o.a) {}
};
passes just fine though; which is grist for the mill for bug 19808 being fixed
(e.g. https://godbolt.org/g/QHLCQv )
Thanks again!
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From: "law at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/61409] [4.9/5/6 regression] -Wmaybe-uninitialized false-positive with -O2
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--- Comment #16 from Jeffrey A. Law <law at redhat dot com> ---
AFAICT tree-ssa-uninit won't look at the predicate associated with an undefined
PHI argument and test it against the predicate for the actual use.
ie, given this PHI from the testcase:
;; basic block 6, loop depth 0
;; pred: 9
;; 5
# ptr_1 = PHI <ptr_5(D)(9), ptr_9(5)>
We want to look at the control dependent path that leads to the edge (9,5).
For this test, that edge is control dependent on bb2:
;; basic block 2, loop depth 0
;; pred: ENTRY
if (i_4(D) != 0)
goto <bb 3>;
else
goto <bb 9>;
ie, we know that for ptr_1 to take the value ptr_5 that i_4 != 0 must be false.
So the guard for the edge (9,5) is NOT i_4 != 0.
And in this testcase, the actual use of ptr_1 is guarded by:
if (i_4(D) != 0)
goto <bb 7>;
else
goto <bb 11>;
When i_4 != 0 is true, then we'll get to the use. So the guard for the use is
i_4 != 0
Those two guards can never both be true. So there's no way at runtime for the
value ptr_5 to flow into ptr_1 and then into the use of ptr_1 in bb7.
And AFAICT, tree-ssa-uninit.c doesn't have the code to do that kind of
analysis.
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Subject: [Bug target/70669] PowerPC __float128 does not support direct move
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--- Comment #1 from Michael Meissner <meissner at gcc dot gnu.org> ---
Created attachment 38275
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38275&action=edit
Proposed patch to fix the problem
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Subject: [Bug target/70672] [5] Wrong code for little endian bitfield modification
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
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--- Comment #2 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Yes, and probably prerequisites as well, and it is really way too big
for backporting.
Investigating; mine.
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Subject: [Bug libstdc++/70360] --enable-vtable-verify
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--- Comment #5 from ctice at gcc dot gnu.org ---
On initial investigation it seems to be a problem that some things are being
built with -fpie but the linker, when making libraries, wants them to be
compiled -fPIC. I'll post more later as I figure it out.
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Subject: [Bug target/70669] PowerPC __float128 does not support direct move
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--- Comment #3 from Michael Meissner <meissner at gcc dot gnu.org> ---
Fixed in subversion id 234995.
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Subject: [Bug target/70669] PowerPC __float128 does not support direct move
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--- Comment #2 from Michael Meissner <meissner at gcc dot gnu.org> ---
Author: meissner
Date: Thu Apr 14 23:21:30 2016
New Revision: 234995
URL: https://gcc.gnu.org/viewcvs?rev=234995&root=gcc&view=rev
Log:
[gcc]
2016-04-14 Michael Meissner <meissner@linux.vnet.ibm.com>
PR target/70669
* config/rs6000/rs6000.c (rs6000_init_hard_regno_mode_ok): Add
direct move handlers for KFmode. Change TFmode handlers test from
FLOAT128_IEEE_P to FLOAT128_VECTOR_P.
[gcc/testsuite]
2016-04-14 Michael Meissner <meissner@linux.vnet.ibm.com>
PR target/70669
* gcc.target/powerpc/pr70669.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/powerpc/pr70669.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/rs6000/rs6000.c
trunk/gcc/testsuite/ChangeLog
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Michael Meissner <meissner at gcc dot gnu.org> changed:
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--- Comment #4 from Michael Meissner <meissner at gcc dot gnu.org> ---
Fixed in subversion id 234995.
>From gcc-bugs-return-522267-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 14 23:53:01 2016
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Subject: [Bug fortran/70673] New: ICE with module containing functions with allocatable character scalars
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Bug ID: 70673
Summary: ICE with module containing functions with allocatable
character scalars
Product: gcc
Version: fortran-dev
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
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module m
contains
subroutine s
character(:), allocatable :: a1
a1 = a1
return
contains
integer function f1()
f1 = 0
end function f1
end subroutine s
integer function f2()
character(:), allocatable :: a2
f2 = 0
! this line causes a seg fault!
a2 = a2
end function f2
end module m
#####################
The above do-nothing construction gives an ICE. Difficult for me to know why
but it is probably something to do with the allocatable character scalars. As
far as I know, it is legal Fortran.
P.S. Thanks Paul, Dominique et al. for the recent push on the these things.
gcc version 6.0.0 20160410 (experimental) (GCC) :: mingw build from
equation.com running on x86_w64.
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--- Comment #1 from David Kinniburgh <davidgkinniburgh at yahoo dot co.uk> ---
Ah, maybe I reduced this too far as a1 and a2 are obviously uninitialized, but
still...
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Segher Boessenkool <segher at gcc dot gnu.org> ---
This is a dup of 68814, which wasn't backported yet.
*** This bug has been marked as a duplicate of bug 68814 ***
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Subject: [Bug rtl-optimization/68814] [6 regression] gcc.dg/pr63594-2.c fails since r226005
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--- Comment #4 from Segher Boessenkool <segher at gcc dot gnu.org> ---
*** Bug 70672 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-522271-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 15 00:17:57 2016
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Subject: [Bug rtl-optimization/68814] [6 regression] gcc.dg/pr63594-2.c fails since r226005
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Resolution|FIXED |---
--- Comment #5 from Segher Boessenkool <segher at gcc dot gnu.org> ---
PR70672 has a testcase that fails without the big rotate/shift patch.
The BITS_BIG_ENDIAN patch needs backporting.
>From gcc-bugs-return-522272-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 15 00:48:16 2016
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Subject: [Bug fortran/70673] ICE with module containing functions with allocatable character scalars
Date: Fri, 15 Apr 2016 00:48:00 -0000
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--- Comment #2 from David Kinniburgh <davidgkinniburgh at yahoo dot co.uk> ---
Ah, maybe I reduced this too far as a1 and a2 are obviously uninitialized...
Is this better - it also produces an ICE?
module m
contains
subroutine s(in)
character(*), intent(in) :: in
character(:), allocatable :: a
a = in
a = a
return
contains
integer function f1()
f1 = 0
end function f1
end subroutine s
integer function f2(a)
character(*), intent(in) :: a
character(:), allocatable :: in
in = a
in = in
f2 = 0
end function f2
end module m
>From gcc-bugs-return-522273-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 15 01:11:36 2016
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Subject: [Bug rtl-optimization/68814] [6 regression] gcc.dg/pr63594-2.c fails since r226005
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Alan Modra <amodra at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
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CC| |amodra at gmail dot com
Target Milestone|6.0 |4.9.4
>From gcc-bugs-return-522274-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 15 01:52:14 2016
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Subject: [Bug target/66033] rs6000 nops removed by rtl_dce
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--- Comment #5 from Alan Modra <amodra at gmail dot com> ---
Comment #4 was added to the wrong bug. Not fixed on gcc-5 branch.
>From gcc-bugs-return-522275-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 15 02:23:53 2016
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Subject: [Bug c++/70528] [5/6 Regression] bogus error: constructor required before non-static data member
Date: Fri, 15 Apr 2016 02:23:00 -0000
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--- Comment #11 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Fri Apr 15 02:23:05 2016
New Revision: 235002
URL: https://gcc.gnu.org/viewcvs?rev=235002&root=gcc&view=rev
Log:
PR c++/70528
* class.c (type_has_constexpr_default_constructor): Return true
for an implicitly declared constructor.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/pr70528.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/class.c
trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-ctor12.C
trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-default-ctor.C
trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-ice6.C
trunk/gcc/testsuite/g++.dg/cpp0x/inh-ctor19.C
>From gcc-bugs-return-522276-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 15 02:25:02 2016
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Subject: [Bug c++/70528] [5 Regression] bogus error: constructor required before non-static data member
Date: Fri, 15 Apr 2016 02:24:00 -0000
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Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[5/6 Regression] bogus |[5 Regression] bogus error:
|error: constructor required |constructor required before
|before non-static data |non-static data member
|member |
--- Comment #12 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed in 6 for now.
>From gcc-bugs-return-522277-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 15 03:35:38 2016
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From: "krebbel at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/70674] New: [4.9/5/6 regression] S/390: Memory access below stack pointer in epilogue
Date: Fri, 15 Apr 2016 03:35:00 -0000
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Bug ID: 70674
Summary: [4.9/5/6 regression] S/390: Memory access below stack
pointer in epilogue
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: critical
Priority: P3
Component: target
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Created attachment 38276
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38276&action=edit
Fix proposal
t.c:
void foo (void) { volatile int a = 5; (void) a; }
cc1 -O2 -fno-omit-frame-pointer -march=z10 -mtune=z196 t.c
The assignment to a is moved by the scheduler *after* the stack pointer
restore. While not being a problem in this example in other circumstances this
might cause data corruption if e.g. a signal handler gets triggered in between.
foo:
ldgr %f2,%r11
ldgr %f0,%r15
lay %r15,-168(%r15)
lgr %r11,%r15
lgdr %r15,%f0 <----- stack pointer restore
mvhi 164(%r11),5 <----- stack write for variable a
l %r1,164(%r11)
lgdr %r11,%f2
br %r14
The variable access is done through the framepointer which does not conflict
with the restore of r15.
The problem was latent in the backend but was so far hidden by doing the
restore of r11 and r15 in the same instruction - a load multiple. However,
there always was the potential problem of doing the stack access with a
temporary register assigned by the compiler.
>From gcc-bugs-return-522278-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 15 03:42:19 2016
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Subject: [Bug target/70674] [4.9/5/6 regression] S/390: Memory access below stack pointer in epilogue
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Andreas Krebbel <krebbel at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
Target| |s390x-ibm-linux
Priority|P3 |P1
CC| |arnez at linux dot vnet.ibm.com,
| |doko at gcc dot gnu.org,
| |uweigand at gcc dot gnu.org
Host| |s390x-ibm-linux
Build| |s390x-ibm-linux
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Subject: [Bug c++/70494] [5/6 regression] Internal Compiler Error: Capturing an array of vectors in a lambda
Date: Fri, 15 Apr 2016 04:03:00 -0000
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--- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Fri Apr 15 04:02:49 2016
New Revision: 235003
URL: https://gcc.gnu.org/viewcvs?rev=235003&root=gcc&view=rev
Log:
PR c++/70494
* decl.c (cxx_maybe_build_cleanup): Handle non-decls.
* typeck2.c (split_nonconstant_init_1): Use it.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-array2.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/decl.c
trunk/gcc/cp/typeck2.c
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From: "jason at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70494] [5 regression] Internal Compiler Error: Capturing an array of vectors in a lambda
Date: Fri, 15 Apr 2016 04:04:00 -0000
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Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
CC| |jason at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |jason at gcc dot gnu.org
Summary|[5/6 regression] Internal |[5 regression] Internal
|Compiler Error: Capturing |Compiler Error: Capturing
|an array of vectors in a |an array of vectors in a
|lambda |lambda
--- Comment #4 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed for GCC 6 for now.
>From gcc-bugs-return-522281-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 15 04:54:05 2016
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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/70650] [6 regression] bootstrap failure: ICE in emit_move_insn, at expr.c:3546
Date: Fri, 15 Apr 2016 04:54:00 -0000
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--- Comment #18 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> --- Comment #17 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot
> Uni-Bielefeld.DE> ---
[...]
> Just for the record, with your patch a sparc-sun-solaris2.12 bootstrap
> is well into stage2, so the immediate failure is gone. Will be a couple
> more hours before I have testsuite results.
Finished now. Results are good with the exception of
FAIL: g++.dg/abi/empty13.C -std=gnu++11 execution test
FAIL: g++.dg/abi/empty13.C -std=gnu++14 execution test
FAIL: g++.dg/abi/empty13.C -std=gnu++98 execution test
Rainer
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From: "trippels at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70675] New: [6 Regression] compare-debug failure building LLVM
Date: Fri, 15 Apr 2016 07:01:00 -0000
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Bug ID: 70675
Summary: [6 Regression] compare-debug failure building LLVM
Product: gcc
Version: 6.0
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Target Milestone: ---
Looks related to PR70594.
markus@x4 tmp % g++ --save-temps -O0 -fcompare-debug -c WinCOFFObjectWriter.ii
g++: error: WinCOFFObjectWriter.ii: -fcompare-debug failure
markus@x4 tmp % diff -u WinCOFFObjectWriter.gkd WinCOFFObjectWriter.gk.gkd
--- WinCOFFObjectWriter.gkd 2016-04-15 09:00:15.277105520 +0200
+++ WinCOFFObjectWriter.gk.gkd 2016-04-15 09:00:19.370332015 +0200
@@ -13249,7 +13249,7 @@
11: struct StringTableBuilder Strings = TARGET_EXPR <D.xxxx, <<< Unknown
tree: aggr_init_expr
6
__comp_ctor
- D.174619
+ D.174622
(struct StringTableBuilder *) <<< Unknown tree: void_cst >>>
1
1 >>>>;
@@ -14236,7 +14236,7 @@
11: struct StringTableBuilder Strings = TARGET_EXPR <D.xxxx, <<< Unknown
tree: aggr_init_expr
6
__comp_ctor
- D.174619
+ D.174622
(struct StringTableBuilder *) <<< Unknown tree: void_cst >>>
1
1 >>>>;
@@ -19519,7 +19519,7 @@
10: struct StringTableBuilder Strings = TARGET_EXPR <D.xxxx, <<< Unknown
tree: aggr_init_expr
6
__comp_ctor
- D.174619
+ D.174622
(struct StringTableBuilder *) <<< Unknown tree: void_cst >>>
1
1 >>>>;
@@ -20315,7 +20315,7 @@
15: struct StringTableBuilder Strings = TARGET_EXPR <D.xxxx, <<< Unknown
tree: aggr_init_expr
6
__comp_ctor
- D.174619
+ D.174622
(struct StringTableBuilder *) <<< Unknown tree: void_cst >>>
1
1 >>>>;
@@ -27563,7 +27563,7 @@
164: struct StringTableBuilder Strings = TARGET_EXPR <D.xxxx, <<< Unknown
tree: aggr_init_expr
6
__comp_ctor
- D.174619
+ D.174622
(struct StringTableBuilder *) <<< Unknown tree: void_cst >>>
1
1 >>>>;
@@ -88237,7 +88237,7 @@
7: struct StringTableBuilder Strings = TARGET_EXPR <D.xxxx, <<< Unknown
tree: aggr_init_expr
6
__comp_ctor
- D.174619
+ D.174622
(struct StringTableBuilder *) <<< Unknown tree: void_cst >>>
1
1 >>>>;
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Subject: [Bug target/70674] [4.9/5/6 regression] S/390: Memory access below stack pointer in epilogue
Date: Fri, 15 Apr 2016 07:17:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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Target Milestone|--- |4.9.4
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
please fill in known-to-work/fail fields. If it's present in 4.9 it can't be
P1
(but it is P2). If it's only latent on branches and exposed on trunk then it
can be P1.
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Subject: [Bug rtl-optimization/68814] [4.9/5 regression] gcc.dg/pr63594-2.c fails since r226005
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Subject: [Bug c/70671] Wrong column number shown for "error: cannot take address of bit-field"
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Keywords| |diagnostic
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-15
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
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Subject: [Bug tree-optimization/70666] SLP vectorization opportunity to use load element + splat
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2016-04-15
Blocks| |53947
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed and mine.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53947
[Bug 53947] [meta-bug] vectorizer missed-optimizations
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From: "jan.smets@alcatel-lucent.com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70617] internal compiler error: Segmentation fault
Date: Fri, 15 Apr 2016 07:21:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70617
--- Comment #7 from Jan Smets <jan.smets@alcatel-lucent.com> ---
Should I open a different issue for that?
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70675] [6 Regression] compare-debug failure building LLVM
Date: Fri, 15 Apr 2016 07:21:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |6.0
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Testcase?
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/70130] [6 Regression] h264ref fails with verification error starting with r231674 (r224221 is the true start of the problem)
Date: Fri, 15 Apr 2016 07:29:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70130
--- Comment #30 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri Apr 15 07:28:44 2016
New Revision: 235006
URL: https://gcc.gnu.org/viewcvs?rev=235006&root=gcc&view=rev
Log:
2016-04-15 Richard Biener <rguenther@suse.de>
Alan Modra <amodra@gmail.com>
PR tree-optimization/70130
* tree-vect-data-refs.c (vect_supportable_dr_alignment): Detect
when alignment stays not the same and no not use the realign
scheme then.
* gcc.dg/vect/O3-pr70130.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/vect/O3-pr70130.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-vect-data-refs.c
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Subject: [Bug tree-optimization/70130] [6 Regression] h264ref fails with verification error starting with r231674 (r224221 is the true start of the problem)
Date: Fri, 15 Apr 2016 07:29:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #31 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug c++/70675] [6 Regression] compare-debug failure building LLVM
Date: Fri, 15 Apr 2016 07:30:00 -0000
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--- Comment #2 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Created attachment 38277
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38277&action=edit
unreduced testcase
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Subject: [Bug c++/70675] [6 Regression] compare-debug failure building LLVM
Date: Fri, 15 Apr 2016 08:16:00 -0000
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--- Comment #3 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Created attachment 38278
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somewhat reduced testcase
~300k seems to be the smallest possible size.
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Subject: [Bug target/70133] AArch64 -mtune=native generates improperly formatted -march parameters
Date: Fri, 15 Apr 2016 08:24:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70133
--- Comment #14 from Christophe Lyon <clyon at gcc dot gnu.org> ---
We (Linaro) have backported the relevant patches to our 5.x branch, and this
fix is available in our 5.3-2016.04 snapshot.
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Subject: [Bug target/70662] vpbroadcastq assemble failure with -masm=intel -mavx512vbmi
Date: Fri, 15 Apr 2016 08:26:00 -0000
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--- Comment #2 from Kirill Yukhin <kyukhin at gcc dot gnu.org> ---
Author: kyukhin
Date: Fri Apr 15 08:25:49 2016
New Revision: 235008
URL: https://gcc.gnu.org/viewcvs?rev=235008&root=gcc&view=rev
Log:
AVX-512. Fix mem operand modifier for Intel syntax.
PR target/70662
gcc/
* config/i386/sse.md: Use proper memory operand
modifiers.
testsuite/gcc/
* gcc.target/i386/pr70662.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr70662.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/sse.md
trunk/gcc/testsuite/ChangeLog
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/67701] Unnecessary/bad instructions for u32-casted access to external symbol (assumes misaligned, superfluous load)
Date: Fri, 15 Apr 2016 08:46:00 -0000
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--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Note the issue should be partly mitigated by the fix for PR70424. The issue
in comment#6 is still there as we still trust the alignment of an underlying
decl more than the alignment info present on the MEM_REF.
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From: "night_ghost at ykoctpa dot ru" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70676] New: suboptimal code generation on AVR
Date: Fri, 15 Apr 2016 08:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70676
Bug ID: 70676
Summary: suboptimal code generation on AVR
Product: gcc
Version: 5.3.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: night_ghost at ykoctpa dot ru
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gcc -Os -fno-optimize-sibling-calls
don't optimizes out tail recursion:
return SPI::transfer(0xff);
f54:8f ef ldi r24, 0xFF; 255
f56:0e 94 d9 2e call 0x5db2 ; 0x5db2 <_ZN3SPI8transferEh>
}
f5a:08 95 ret
where it should be
ldi r24, 0xFF; 255
jmp 0x5db2 ; 0x5db2 <_ZN3SPI8transferEh>
Yes I can remove -fno-optimize-sibling-calls but then size of compiled project
will be much more:
with: 30566 bytes (93.3% Full)
without: 30772 bytes and binary don't fit to flash (30720 is maximum)
Reason is that even with -Os optimize-sibling-calls tries to make epilogue for
each tail recursion:
2080:<----->92 e0 <-->ldi<--->r25, 0x02<----->; 2
2082:<----->df 91 <-->pop<--->r29
2084:<----->cf 91 <-->pop<--->r28
2086:<----->1f 91 <-->pop<--->r17
2088:<----->0f 91 <-->pop<--->r16
208a:<----->ff 90 <-->pop<--->r15
208c:<----->ef 90 <-->pop<--->r14
208e:<----->bf 90 <-->pop<--->r11
2090:<----->af 90 <-->pop<--->r10
2092:<----->9f 90 <-->pop<--->r9
2094:<----->8f 90 <-->pop<--->r8
2096:<----->0c 94 2a 0f <-->jmp<--->0x1e54<>; 0x1e54
<_ZL12osd_printf_1PKcf>
(rjmp here)
209a:<----->df 91 <-->pop<--->r29
209c:<----->cf 91 <-->pop<--->r28
209e:<----->1f 91 <-->pop<--->r17
20a0:<----->0f 91 <-->pop<--->r16
20a2:<----->ff 90 <-->pop<--->r15
20a4:<----->ef 90 <-->pop<--->r14
20a6:<----->bf 90 <-->pop<--->r11
20a8:<----->af 90 <-->pop<--->r10
20aa:<----->9f 90 <-->pop<--->r9
20ac:<----->8f 90 <-->pop<--->r8
20ae:<----->08 95 <-->ret
Can GCC in -Os really optimize only size and rollback optimizations if size of
"optimized" code is more than size of non-optimized ?
>From gcc-bugs-return-522297-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 15 08:52:59 2016
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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/67701] Unnecessary/bad instructions for u32-casted access to external symbol (assumes misaligned, superfluous load)
Date: Fri, 15 Apr 2016 08:52:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67701
--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
The reason for the legacy on x86 targets is indeed not present on
strict-alignment platforms if it is the case that on strict-alignment platforms
unaligned accesses trap (and are not merely slow).
Index: gcc/builtins.c
===================================================================
--- gcc/builtins.c (revision 235005)
+++ gcc/builtins.c (working copy)
@@ -339,7 +339,8 @@ get_object_alignment_2 (tree exp, unsign
Do so only if get_pointer_alignment_1 did not reveal absolute
alignment knowledge and if using that alignment would
improve the situation. */
- if (!addr_p && !known_alignment
+ if (!addr_p
+ && (!known_alignment || STRICT_ALIGNMENT)
&& TYPE_ALIGN (TREE_TYPE (exp)) > align)
align = TYPE_ALIGN (TREE_TYPE (exp));
else
>From gcc-bugs-return-522298-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 15 09:09:02 2016
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From: "night_ghost at ykoctpa dot ru" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70677] New: Suboptimal cond on AVR: unneeded stack frame
Date: Fri, 15 Apr 2016 09:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70677
Bug ID: 70677
Summary: Suboptimal cond on AVR: unneeded stack frame
Product: gcc
Version: 5.3.1
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here a lot of commands to deal with stack frame for only one byte
//(out of scope:
struct Point {
byte x;
byte y;
};
static boolean inline is_alt(point p){
return (p.y & 0x40);
}
//)
static void panVel(point p){
1e14: cf 93 push r28
1e16: df 93 push r29
1e18: 1f 92 push r1
1e1a: cd b7 in r28, 0x3d ; 61
1e1c: de b7 in r29, 0x3e ; 62
printSpeed(cnvGroundSpeed(),is_alt(p));
1e1e: 96 fb bst r25, 6
1e20: 22 27 eor r18, r18
1e22: 20 f9 bld r18, 0
1e24: 29 83 std Y+1, r18 ; 0x01
1e26: 0e 94 33 09 call 0x1266; 0x1266 <_ZL14cnvGroundSpeedv>
1e2a: ab 01 movw r20, r22
1e2c: bc 01 movw r22, r24
}
1e2e: 29 81 ldd r18, Y+1 ; 0x01
1e30: 87 e8 ldi r24, 0x87 ; 135
1e32: 92 e0 ldi r25, 0x02 ; 2
1e34: 0e 94 c6 0e call 0x1d8c; 0x1d8c <_ZL10printSpeedPKcfh>
1e38: 0f 90 pop r0
1e3a: df 91 pop r29
1e3c: cf 91 pop r28
1e3e: 08 95 ret
R18 can be PUSH'ed, moved to r28 or even calculated after call to x1266
>From gcc-bugs-return-522299-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 15 09:13:58 2016
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Subject: [Bug c/70678] New: Static function compilation behaviour changes with __attribute__((optimize("O2"))) even if already compiling with -O2
Date: Fri, 15 Apr 2016 09:13:00 -0000
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Bug ID: 70678
Summary: Static function compilation behaviour changes with
__attribute__((optimize("O2"))) even if already
compiling with -O2
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Noticed this while tracking down another issue. I have seen this on GCC 4.6.4
and 5.3.0.
#include <stdio.h>
#include <stdlib.h>
static void test_function() {
printf("Hello world!\n");
}
int main() {
test_function();
return EXIT_SUCCESS;
}
Compiled using "gcc -o test test.c -O2 -save-temps -Wall -Wextra
-fno-strict-aliasing -fwrapv", GCC will optimize the test_function() by
including it into main().
If the function definition is changed to
static void __attribute__((optimize("O2"))) test_function() {
and the file is compiled using the same command, the test_function() will stay
separate, and is not optimized into main(), even though the optimization levels
have not changed.
Intermediate with the additional optimize attribute:
https://gist.githubusercontent.com/lutoma/b36eda746d618c2e5f8b0e28e1478b34/raw/a9ce9f8d23f954a112a911621e3e3c10d3a1f307/test.i
Intermediate without the additional attribute:
https://gist.githubusercontent.com/lutoma/ac300f0349be4e4de15a4709813e17f0/raw/4b193c8d2aca363c26a0241ad6d7a821427593a5/test.i
Generated assembly for the functions:
Without extra optimize attribute:
00000000004003f0 <main>:
4003f0: 48 83 ec 08 sub rsp,0x8
4003f4: bf 94 05 40 00 mov edi,0x400594
4003f9: e8 c2 ff ff ff call 4003c0 <puts@plt>
4003fe: 31 c0 xor eax,eax
400400: 48 83 c4 08 add rsp,0x8
400404: c3 ret
[…]
With the extra attribute:
0000000000400506 <test_function>:
400506: bf 94 05 40 00 mov edi,0x400594
40050b: e9 b0 fe ff ff jmp 4003c0 <puts@plt>
00000000004003f0 <main>:
4003f0: 48 83 ec 08 sub rsp,0x8
4003f4: 31 c0 xor eax,eax
4003f6: e8 0b 01 00 00 call 400506 <test_function>
4003fb: 31 c0 xor eax,eax
4003fd: 48 83 c4 08 add rsp,0x8
400401: c3 ret
[…]
Sorry if this is a duplicate or intended/undefined behaviour in some way.
Cheers,
Lukas
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Subject: [Bug target/70568] [4.9/5/6 regression] PowerPC64: union of floating and fixed doesn't use POWER8 GPR/VSR moves
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Subject: [Bug rtl-optimization/69633] [6 Regression] Redundant move is generated after r228097
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Subject: [Bug c/70651] [6 Regression] ICE on valid code on x86_64-linux-gnu in build_va_arg, at c-family/c-common.c:5728
Date: Fri, 15 Apr 2016 09:24:00 -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> ---
Seems we have a fix - lets fix it for GCC 6.
>From gcc-bugs-return-522304-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 15 09:27:12 2016
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Subject: [Bug c++/70675] [6 Regression] compare-debug failure building LLVM
Date: Fri, 15 Apr 2016 09:27:00 -0000
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Does removing "deletable" from the constexpr_call_table fix it? Does playing
with GC parameters allow further reduction?
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Subject: [Bug target/70674] [4.9/5/6 regression] S/390: Memory access below stack pointer in epilogue
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
Severity|critical |normal
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Subject: [Bug c++/70675] [6 Regression] compare-debug failure building LLVM
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed btw.
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Subject: [Bug c++/70675] [6 Regression] compare-debug failure building LLVM
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Index: gcc/cp/constexpr.c
===================================================================
--- gcc/cp/constexpr.c (revision 235005)
+++ gcc/cp/constexpr.c (working copy)
@@ -915,7 +915,7 @@ struct constexpr_ctx {
/* A table of all constexpr calls that have been evaluated by the
compiler in this translation unit. */
-static GTY ((deletable)) hash_table<constexpr_call_hasher>
*constexpr_call_table;
+static GTY (()) hash_table<constexpr_call_hasher> *constexpr_call_table;
static tree cxx_eval_constant_expression (const constexpr_ctx *, tree,
bool, bool *, bool *, tree * = NULL);
fixes it.
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Subject: [Bug c++/70675] [6 Regression] compare-debug failure building LLVM
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--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Which means playing with gc parameters might reduce it to sth suitable for the
testsuite?
>From gcc-bugs-return-522309-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 15 09:34:18 2016
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From: "trippels at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70679] New: [6 Regression] -fcompare-debug building LLVM with checking=release compiler
Date: Fri, 15 Apr 2016 09:34:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70679
Bug ID: 70679
Summary: [6 Regression] -fcompare-debug building LLVM with
checking=release compiler
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Assignee: unassigned at gcc dot gnu.org
Reporter: trippels at gcc dot gnu.org
Target Milestone: ---
trippels@gcc2-power8 llvm_build % g++ --save-temps -fcompare-debug
-DGTEST_HAS_RTTI=0 -D_DEBUG -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS
-D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -fPIC -fvisibility-inlines-hidden
-Wall -W -Wno-unused-parameter -Wwrite-strings -Wcast-qual
-Wno-missing-field-initializers -pedantic -Wno-long-long
-Wno-maybe-uninitialized -Wdelete-non-virtual-dtor -Wno-comment -std=c++11 -O2
-pipe -mlra -Ilib/Support -I/home/trippels/llvm/lib/Support -Iinclude
-I/home/trippels/llvm/include -UNDEBUG -fno-exceptions -fno-rtti -MMD -MT
lib/Support/CMakeFiles/LLVMSupport.dir/CommandLine.cpp.o -MF
lib/Support/CMakeFiles/LLVMSupport.dir/CommandLine.cpp.o.d -o
lib/Support/CMakeFiles/LLVMSupport.dir/CommandLine.cpp.o -c
/home/trippels/llvm/lib/Support/CommandLine.cpp
g++: warning: -pipe ignored because -save-temps specified
g++: error: /home/trippels/llvm/lib/Support/CommandLine.cpp: -fcompare-debug
failure
trippels@gcc2-power8 llvm_build % diff -u CommandLine.gkd CommandLine.gk.gkd
--- CommandLine.gkd 2016-04-15 09:31:13.246179530 +0000
+++ CommandLine.gk.gkd 2016-04-15 09:31:16.646253990 +0000
@@ -24217,8 +24217,8 @@
(code_label # 0 0 868 "" [1 uses])
(note # 0 0 [bb 13] NOTE_INSN_BASIC_BLOCK)
(insn:TI # 0 0 (set (reg:DI 9 9 [368])
- (const_int 808517632 [0x30310000]))
/home/trippels/llvm/include/llvm/Support/raw_ostream.h:169# {*movdi_internal64}
- (expr_list:REG_EQUAL (const_int 808517632 [0x30310000])
+ (const_int 858849280 [0x33310000]))
/home/trippels/llvm/include/llvm/Support/raw_ostream.h:169# {*movdi_internal64}
+ (expr_list:REG_EQUAL (const_int 858849280 [0x33310000])
(nil)))
(insn # 0 0 (set (reg:DI 9 9 [368])
(ior:DI (reg:DI 9 9 [368])
@@ -24235,7 +24235,7 @@
(insn # 0 0 (set (reg:DI 9 9 [317])
(ior:DI (reg:DI 9 9 [368])
(const_int 14640 [0x3930])))
/home/trippels/llvm/include/llvm/Support/raw_ostream.h:169# {*booldi3_imm}
- (expr_list:REG_EQUIV (const_int 3472620770666625328 [0x30313a31333a3930])
+ (expr_list:REG_EQUIV (const_int 3688793552780409136 [0x33313a31333a3930])
(nil)))
(insn # 0 0 (set (mem:DI (reg/f:DI 10 10 [orig:176 prephitmp_70 ] [176]) [
MEM[(void *)prephitmp_70]+0 S8 A8])
(reg:DI 9 9 [317]))
/home/trippels/llvm/include/llvm/Support/raw_ostream.h:169# {*movdi_internal64}
Unfortunately it doesn't fail on the CommandLine.ii file.
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Subject: [Bug target/70662] vpbroadcastq assemble failure with -masm=intel -mavx512vbmi
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--- Comment #3 from Kirill Yukhin <kyukhin at gcc dot gnu.org> ---
Author: kyukhin
Date: Fri Apr 15 09:36:31 2016
New Revision: 235013
URL: https://gcc.gnu.org/viewcvs?rev=235013&root=gcc&view=rev
Log:
AVX-512. Use proper mem ops modifier for Intel syntax in broadcast patter.
PR target/70662
gcc/
* config/i386/sse.md: Use proper memory operand
modifiers.
gcc/testsuite.
* gcc.target/i386/pr70662.c: New test.
Added:
branches/gcc-5-branch/gcc/testsuite/gcc.target/i386/pr70662.c
Modified:
branches/gcc-5-branch/gcc/ChangeLog
branches/gcc-5-branch/gcc/config/i386/sse.md
branches/gcc-5-branch/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/70673] [5/6 Regression] ICE with module containing functions with allocatable character scalars
Date: Fri, 15 Apr 2016 09:59:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70673
Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-15
CC| |tkoenig at gcc dot gnu.org
Known to work| |4.8.5, 4.9.3
Version|fortran-dev |6.0
Blocks| |68241
Summary|ICE with module containing |[5/6 Regression] ICE with
|functions with allocatable |module containing functions
|character scalars |with allocatable character
| |scalars
Ever confirmed|0 |1
Known to fail| |5.3.0, 6.0
--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
The tests compile with 4.8.5 and 4.9.3, but give an ICE with 5.3 and trunk
(6.0). The change occurred between revisions r219174 (2015-01-04, OK) and
r219318 (2015-01-07, ICE); r219193 (pr47674)?
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68241
[Bug 68241] [meta-bug] Deferred-length character
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Subject: [Bug c++/70679] [6 Regression] -fcompare-debug building LLVM with checking=release compiler
Date: Fri, 15 Apr 2016 10:00:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |6.0
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Can you see if the fix in PR70675 works? That is, is this a dup? Does
reducing GC params make it reproduce with the .ii file?
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Subject: [Bug c/70678] Static function compilation behaviour changes with __attribute__((optimize("O2"))) even if already compiling with -O2
Date: Fri, 15 Apr 2016 10:10:00 -0000
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Declaring test_function inline and using -Winline shows:
t.c:4:52: warning: inlining failed in call to ‘test_function’: optimization
level attribute mismatch [-Winline]
static inline void __attribute__((optimize("O2"))) test_function() {
^~~~~~~~~~~~~
which is because while -fwrapv is still set -fno-strict-aliasing is not.
This is because parse_optimize_options (-O2) will turn on -fstrict-aliasing.
It does that via calling
301 default_options_optimization (opts, opts_set,
302 decoded_options, decoded_options_count,
303 loc, lang_mask, &handlers, dc);
and I think this is intended behavior. It's a little inconsistent that
-fwrapv is not changed, but that's because it is never on by default.
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Subject: [Bug c++/70679] [6 Regression] -fcompare-debug building LLVM with checking=release compiler
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--- Comment #2 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #1)
> Can you see if the fix in PR70675 works? That is, is this a dup?
Unfortunately no.
> Does reducing GC params make it reproduce with the .ii file?
--param ggc-min-expand=5 --param ggc-min-heapsize=5 doesn't help.
>From gcc-bugs-return-522315-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 15 10:18:05 2016
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Subject: [Bug c/70436] [4.9/5/6 Regression] -Wparentheses missing ambiguous else warning
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--- Comment #18 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 38279
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38279&action=edit
gcc6-pr70436-omp.patch
Untested fix for OpenMP/OpenACC/Cilk+/#pragma GCC ivdep, both C and C++.
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Subject: [Bug c++/70679] [6 Regression] -fcompare-debug building LLVM with checking=release compiler
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #3 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Sorry this is a bogus bug.
CommandLine.cpp contains:
std::cout << " Built " << __DATE__ << " (" << __TIME__ << ").\n"
So this is simply the __TIME__ difference...
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Subject: [Bug c++/70675] [6 Regression] compare-debug failure building LLVM
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
CC| |jakub at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 38280
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38280&action=edit
gcc6-pr70675.patch
Untested fix.
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Subject: [Bug middle-end/67239] [6 Regression] FAIL: 23_containers/unordered_set/insert/hash_policy.cc 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 #20 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The empty class passing ABI changes were reverted and are going to be resolved
only for GCC7+.
I've tried your testcase (and latest preprocessed hash_policy.ii from i686
build) with -g -O2 {,-finline-small-functions} {,-fpic} -mx32, and certainly
don't see any .cfi_escape directives in there. So, what is the real bug then?
>From gcc-testresults, it seems it only fails with -mx32 -fpic, and not with
plain -mx32, but that is all I can find out.
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Subject: [Bug middle-end/70680] New: [5/6 Regression] OpenMP SIMD linear variable privatized too eagerly
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Product: gcc
Version: 5.1.0
Status: UNCONFIRMED
Keywords: openmp
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: amonakov at gcc dot gnu.org
Target Milestone: ---
#include <stdio.h>
int main()
{
int i=0;
#pragma omp task default(shared) if(0)
{
#pragma omp simd
for (i=0; i<100; i++)
;
#ifdef USE
asm("" : : "r"(i));
#endif
}
printf("%d\n", i);
}
Per my understanding of the OpenMP spec, this program should always print
'100'; indeed, that is observed with gcc-4.9, but gcc-5 does not share 'i' with
the task region, unless a dummy use is injected after the openmp-simd loop:
$ gcc-4.9 -O2 -fopenmp t.c && ./a.out
100
$ gcc-5.1 -O2 -fopenmp t.c && ./a.out
0
$ gcc-5.1 -DUSE -O2 -fopenmp t.c && ./a.out
100
>From gcc-bugs-return-522320-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 15 11:07:43 2016
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Subject: [Bug middle-end/70680] [5/6 Regression] OpenMP SIMD linear variable privatized too eagerly
Date: Fri, 15 Apr 2016 11:07:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |5.4
>From gcc-bugs-return-522321-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 15 11:37:46 2016
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From: "ktkachov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/70681] New: [6 Regression] FAIL: gcc.dg/ira-shrinkwrap-prep-2.c gcc.dg/pr10474.c on arm and powerpc
Date: Fri, 15 Apr 2016 11:37:00 -0000
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Bug ID: 70681
Summary: [6 Regression] FAIL: gcc.dg/ira-shrinkwrap-prep-2.c
gcc.dg/pr10474.c on arm and powerpc
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Keywords: missed-optimization
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: ktkachov at gcc dot gnu.org
Target Milestone: ---
Target: arm, powerpc
As reported at:
https://gcc.gnu.org/ml/gcc-patches/2016-03/msg01640.html
and
https://gcc.gnu.org/ml/gcc-patches/2016-04/msg00094.html
The tests:
gcc.dg/ira-shrinkwrap-prep-2.c scan-rtl-dump pro_and_epilogue
"Performing shrink-wrapping"
gcc.dg/pr10474.c scan-rtl-dump pro_and_epilogue "Performing shrink-wrapping"
Have started failing on arm and powerpc after a regalloc change.
On arm at least the resulting codegen doesn't look worse
(https://gcc.gnu.org/ml/gcc-patches/2016-04/msg00223.html)
but arguably shrink-wrapping could be improved
(https://gcc.gnu.org/ml/gcc-patches/2016-04/msg00265.html)
This is a report to track work on shrinkwrapping or adjustment of the
testscases
>From gcc-bugs-return-522322-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 15 11:38:23 2016
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Subject: [Bug rtl-optimization/70681] [6 Regression] FAIL: gcc.dg/ira-shrinkwrap-prep-2.c gcc.dg/pr10474.c on arm and powerpc
Date: Fri, 15 Apr 2016 11:38:00 -0000
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ktkachov at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-15
Known to work| |5.3.1
Ever confirmed|0 |1
Known to fail| |6.0
>From gcc-bugs-return-522323-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 15 11:40:13 2016
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Subject: [Bug middle-end/70680] [5/6 Regression] OpenMP SIMD linear variable privatized too eagerly
Date: Fri, 15 Apr 2016 11:40:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2016-04-15
CC| |jakub at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Confirmed, gimplification bug where the shared (i) clause isn't added; I'll
have a look next week; it doesn't have to block 6.1 though, can be backported
after it goes out.
>From gcc-bugs-return-522324-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 15 11:52:54 2016
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/70646] [4.9/5/6 Regression] Corrupt truncated function
Date: Fri, 15 Apr 2016 11:52:00 -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 #14 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Josh Poimboeuf from comment #13)
> So if I understand correctly, some reachable code is incorrectly getting
> marked unreachable and then getting discarded.
>
> Interestingly, the function's epilogue (frame pointer restore) and return
> instruction are also getting discarded. Can you tell if that will always be
> the case when this bug triggers?
I don't think we can rely on that. The path could simply fall thru to
a random instruction which is still inside the function. Say, if it was
if (x)
...
else
...
foo ();
then the arm marked unreachable would simply disappear.
> If so, that should make it possible for objtool to reliably detect the bug.
>From gcc-bugs-return-522325-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 15 12:02:04 2016
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From: "lutoma at ohai dot su" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/70678] Static function compilation behaviour changes with __attribute__((optimize("O2"))) even if already compiling with -O2
Date: Fri, 15 Apr 2016 12:02:00 -0000
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--- Comment #2 from Lukas Martini <lutoma at ohai dot su> ---
Hi,
thanks for testing. I have to admit the explanation regarding how the various
switches play together went a little over my head, but if you tell me that's
intended behaviour, I'll trust your word on it :)
Just to be sure: For me, this also happens when "-fno-strict-aliasing -fwrapv"
are not added as parameters, I only added those because I saw them mentioned
somewhere in the bug reporting guidelines. If it's still intended behaviour
without them, feel free to close this bug report and thanks for the help!
Cheers,
Lukas
>From gcc-bugs-return-522326-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 15 12:03:47 2016
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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/70651] [6 Regression] ICE on valid code on x86_64-linux-gnu in build_va_arg, at c-family/c-common.c:5728
Date: Fri, 15 Apr 2016 12:03:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #7 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
I'm testing this:
--- a/gcc/c-family/c-common.c
+++ b/gcc/c-family/c-common.c
@@ -5725,7 +5725,12 @@ build_va_arg (location_t loc, tree expr, tree type)
/* Verify that &ap is still recognized as having va_list type. */
tree canon_expr_type
= targetm.canonical_va_list_type (TREE_TYPE (expr));
- gcc_assert (canon_expr_type != NULL_TREE);
+ if (canon_expr_type == NULL_TREE)
+ {
+ error_at (loc,
+ "first argument to %<va_arg%> not of type %<va_list%>");
+ return error_mark_node;
+ }
return build_va_arg_1 (loc, type, expr);
}
@@ -5793,7 +5798,12 @@ build_va_arg (location_t loc, tree expr, tree type)
/* Verify that &ap is still recognized as having va_list type. */
tree canon_expr_type
= targetm.canonical_va_list_type (TREE_TYPE (expr));
- gcc_assert (canon_expr_type != NULL_TREE);
+ if (canon_expr_type == NULL_TREE)
+ {
+ error_at (loc,
+ "first argument to %<va_arg%> not of type %<va_list%>");
+ return error_mark_node;
+ }
}
else
{
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Subject: [Bug c/70436] [4.9/5/6 Regression] -Wparentheses missing ambiguous else warning
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70436
--- Comment #19 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Apr 15 12:24:18 2016
New Revision: 235020
URL: https://gcc.gnu.org/viewcvs?rev=235020&root=gcc&view=rev
Log:
PR c/70436
c/
* c-parser.c (c_parser_pragma): Add IF_P argument, pass it down
where needed.
(c_parser_external_declaration, c_parser_struct_or_union_specifier,
c_parser_parameter_declaration, c_parser_compound_statement_nostart,
c_parser_objc_class_instance_variables, c_parser_objc_methodprotolist):
Adjust c_parser_pragma callers.
(c_parser_statement_after_labels): Likewise. Adjust c_parser_cilk_for
caller.
(c_parser_omp_structured_block): Add IF_P argument, pass it down to
c_parser_statement.
(c_parser_oacc_data, c_parser_oacc_host_data, c_parser_oacc_loop,
c_parser_oacc_kernels_parallel, c_parser_omp_critical,
c_parser_omp_simd, c_parser_omp_for, c_parser_omp_master,
c_parser_omp_ordered, c_parser_omp_parallel, c_parser_omp_single,
c_parser_omp_task, c_parser_omp_taskgroup, c_parser_omp_distribute,
c_parser_omp_teams, c_parser_omp_target_data, c_parser_omp_target,
c_parser_omp_taskloop, c_parser_omp_construct, c_parser_cilk_grainsize,
c_parser_cilk_simd, c_parser_cilk_for): Add IF_P argument, pass it
down where needed.
(c_parser_omp_for_loop): Likewise. Clear IF_P if nbraces.
(c_parser_omp_sections_scope): Adjust c_parser_omp_structured_block
calls.
cp/
* parser.c (cp_parser_pragma): Add IF_P argument, pass it down
where needed.
(cp_parser_declaration_seq_opt, cp_parser_member_specification_opt,
cp_parser_objc_interstitial_code, cp_parser_omp_declare_simd,
cp_parser_oacc_routine): Adjust cp_parser_pragma callers.
(cp_parser_statement): Likewise. Adjust cp_parser_cilk_for caller.
(cp_parser_omp_structured_block): Add IF_P argument, pass it down to
cp_parser_statement.
(cp_parser_oacc_data, cp_parser_oacc_host_data, cp_parser_oacc_loop,
cp_parser_oacc_kernels_parallel, cp_parser_omp_critical,
cp_parser_omp_simd, cp_parser_omp_for, cp_parser_omp_master,
cp_parser_omp_ordered, cp_parser_omp_parallel, cp_parser_omp_single,
cp_parser_omp_task, cp_parser_omp_taskgroup, cp_parser_omp_distribute,
cp_parser_omp_teams, cp_parser_omp_target_data, cp_parser_omp_target,
cp_parser_omp_taskloop, cp_parser_omp_construct,
cp_parser_cilk_grainsize, cp_parser_cilk_simd, cp_parser_cilk_for):
Add IF_P argument, pass it down where needed.
(cp_parser_omp_for_loop): Likewise. Clear IF_P if nbraces.
(cp_parser_omp_sections_scope): Adjust cp_parser_omp_structured_block
calls.
testsuite/
* c-c++-common/Wparentheses-1.c: New test.
* c-c++-common/gomp/Wparentheses-1.c: New test.
* c-c++-common/gomp/Wparentheses-2.c: New test.
* c-c++-common/gomp/Wparentheses-3.c: New test.
* c-c++-common/gomp/Wparentheses-4.c: New test.
* c-c++-common/cilk-plus/PS/Wparentheses-1.c: New test.
* c-c++-common/cilk-plus/CK/Wparentheses-1.c: New test.
* c-c++-common/goacc/Wparentheses-1.c: New test.
Added:
trunk/gcc/testsuite/c-c++-common/Wparentheses-1.c
trunk/gcc/testsuite/c-c++-common/cilk-plus/CK/Wparentheses-1.c
trunk/gcc/testsuite/c-c++-common/cilk-plus/PS/Wparentheses-1.c
trunk/gcc/testsuite/c-c++-common/goacc/Wparentheses-1.c
trunk/gcc/testsuite/c-c++-common/gomp/Wparentheses-1.c
trunk/gcc/testsuite/c-c++-common/gomp/Wparentheses-2.c
trunk/gcc/testsuite/c-c++-common/gomp/Wparentheses-3.c
trunk/gcc/testsuite/c-c++-common/gomp/Wparentheses-4.c
Modified:
trunk/gcc/c/ChangeLog
trunk/gcc/c/c-parser.c
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/parser.c
trunk/gcc/testsuite/ChangeLog
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70588] SIGBUS on a VLA larger than SIZE_MAX / 2
Date: Fri, 15 Apr 2016 12:30:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70588
--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Apr 15 12:29:32 2016
New Revision: 235021
URL: https://gcc.gnu.org/viewcvs?rev=235021&root=gcc&view=rev
Log:
PR c++/69517
PR c++/70019
PR c++/70588
* g++.dg/cpp1y/vla11.C: Revert for real.
Removed:
trunk/gcc/testsuite/g++.dg/cpp1y/vla11.C
Modified:
trunk/gcc/testsuite/ChangeLog
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70019] VLA size overflow not detected
Date: Fri, 15 Apr 2016 12:30:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70019
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Apr 15 12:29:32 2016
New Revision: 235021
URL: https://gcc.gnu.org/viewcvs?rev=235021&root=gcc&view=rev
Log:
PR c++/69517
PR c++/70019
PR c++/70588
* g++.dg/cpp1y/vla11.C: Revert for real.
Removed:
trunk/gcc/testsuite/g++.dg/cpp1y/vla11.C
Modified:
trunk/gcc/testsuite/ChangeLog
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/69517] [7 regression] SEGV on a VLA with excess initializer elements
Date: Fri, 15 Apr 2016 12:30:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69517
--- Comment #13 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Apr 15 12:29:32 2016
New Revision: 235021
URL: https://gcc.gnu.org/viewcvs?rev=235021&root=gcc&view=rev
Log:
PR c++/69517
PR c++/70019
PR c++/70588
* g++.dg/cpp1y/vla11.C: Revert for real.
Removed:
trunk/gcc/testsuite/g++.dg/cpp1y/vla11.C
Modified:
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug middle-end/67239] [6 Regression] FAIL: 23_containers/unordered_set/insert/hash_policy.cc execution test
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67239
--- Comment #21 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Jakub Jelinek from comment #20)
> From gcc-testresults, it seems it only fails with -mx32 -fpic, and not with
> plain -mx32, but that is all I can find out.
See:
https://gcc.gnu.org/ml/gcc-regression/2016-04/msg00123.html
https://gcc.gnu.org/ml/gcc-regression/2016-04/msg00129.html
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Subject: [Bug rtl-optimization/70681] [6 Regression] FAIL: gcc.dg/ira-shrinkwrap-prep-2.c gcc.dg/pr10474.c on arm and powerpc
Date: Fri, 15 Apr 2016 12:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70681
--- Comment #1 from ktkachov at gcc dot gnu.org ---
Author: ktkachov
Date: Fri Apr 15 12:45:20 2016
New Revision: 235024
URL: https://gcc.gnu.org/viewcvs?rev=235024&root=gcc&view=rev
Log:
[testsuite] PR rtl-optimization/70681: XFAIL ira-shrinkwrap-prep-2.c and
pr10474.c tests on arm, powerpc
PR rtl-optimization/70681
* gcc.dg/ira-shrinkwrap-prep-2.c: XFAIL shrinkwrapping
dump scan on arm and powerpc.
* gcc.dg/pr10474.c: Likewise.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/ira-shrinkwrap-prep-2.c
trunk/gcc/testsuite/gcc.dg/pr10474.c
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--- Comment #22 from H.J. Lu <hjl.tools at gmail dot com> ---
Created attachment 38281
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38281&action=edit
A testcase
Compile it with -O2 -S -mx32.
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--- Comment #23 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Jakub Jelinek from comment #20)
> The empty class passing ABI changes were reverted and are going to be
> resolved only for GCC7+.
> I've tried your testcase (and latest preprocessed hash_policy.ii from i686
> build) with -g -O2 {,-finline-small-functions} {,-fpic} -mx32, and certainly
> don't see any .cfi_escape directives in there. So, what is the real bug
> then?
i686 != x32. Please try the testcase in
https://gcc.gnu.org/bugzilla/attachment.cgi?id=38281
and compile it with -O2 -S:
[hjl@gnu-6 libstdc++-v3]$ ../../gcc/xgcc -B../../gcc/ -O2 -S hash_policy.ii
-mx32
[hjl@gnu-6 libstdc++-v3]$ grep cfi_escape hash_policy.s
.cfi_escape 0x2e,0x10
.cfi_escape 0x2e,0
[hjl@gnu-6 libstdc++-v3]$
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Subject: [Bug rtl-optimization/70681] [6/7 Regression] FAIL: gcc.dg/ira-shrinkwrap-prep-2.c gcc.dg/pr10474.c on arm and powerpc
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ktkachov at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |7.0
Summary|[6 Regression] FAIL: |[6/7 Regression] FAIL:
|gcc.dg/ira-shrinkwrap-prep- |gcc.dg/ira-shrinkwrap-prep-
|2.c gcc.dg/pr10474.c on |2.c gcc.dg/pr10474.c on
|arm and powerpc |arm and powerpc
--- Comment #2 from ktkachov at gcc dot gnu.org ---
Tests xfailed on arm and powerpc for GCC 6.
Changing milestone for GCC 7
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Subject: [Bug c++/70675] [6 Regression] compare-debug failure building LLVM
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--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Apr 15 13:07:43 2016
New Revision: 235025
URL: https://gcc.gnu.org/viewcvs?rev=235025&root=gcc&view=rev
Log:
PR c++/70675
* tree-pretty-print.c (do_niy): Add FLAGS argument, pass it down
to dump_generic_node.
(NIY): Pass also flags to do_niy.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree-pretty-print.c
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Subject: [Bug c++/70675] [6 Regression] compare-debug failure building LLVM
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug c++/70505] [4.9/5/6 Regression] Constexpr failure when template type specified
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Jason Merrill <jason at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Subject: [Bug c/70651] [6 Regression] ICE on invalid code on x86_64-linux-gnu in build_va_arg, at c-family/c-common.c:5728
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #9 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug ipa/70646] [4.9/5/6 Regression] Corrupt truncated function
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CC| |jakub at gcc dot gnu.org
--- Comment #15 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Even with the #c10 change it looks to be aliasing violation, does it work fine
if you compile with -fno-strict-aliasing or use may_alias on the type through
which it is read?
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Subject: [Bug c/70651] [6 Regression] ICE on invalid code on x86_64-linux-gnu in build_va_arg, at c-family/c-common.c:5728
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--- Comment #8 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Fri Apr 15 13:15:23 2016
New Revision: 235027
URL: https://gcc.gnu.org/viewcvs?rev=235027&root=gcc&view=rev
Log:
PR c/70651
* c-common.c (build_va_arg): Change two asserts into errors and return
error_mark_node.
* c-c++-common/pr70651.c: New test.
Added:
trunk/gcc/testsuite/c-c++-common/pr70651.c
Modified:
trunk/gcc/c-family/ChangeLog
trunk/gcc/c-family/c-common.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug ipa/70646] [4.9/5/6 Regression] Corrupt truncated function
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--- Comment #16 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
> Honza? This seems to be somewhat fragile (redirecting things to unreachable
> but _not_ changing the actual predicates in the IL). Claiming the
> predicate is constant true is also a bit bogus (as can be seen in following
> optimization).
At WPA stage inliner can not update IL, so it simply redirects to
builtin_unreachable if predicate is FALSE and expects scalar passes to be
monotonously smarter than IPA analysis.
BB3 predicate true is conservatively correct: there is no predicate to
represent that something is not constant because we assume scalar optimizers to
possibly be stronger than us and decide better.
Here we manage to assume that builtin_constant_p is true and thus we conclude
the following BB is unreachable:
BB 4 predicate:(op0[ref offset: 0] not constant)
iftmp.0_26 = __builtin_bswap64 (_3);
freq:0.61 size: 1 time: 1
This is because ipa-prop analyzes the values in node_name:
Jump functions of caller broken/2:
callsite broken/2 -> wwn_to_u64/1 :
param 0: UNKNOWN
Aggregate passed by reference:
offset: 0, cst: 255
offset: 8, cst: 255
offset: 16, cst: 255
offset: 24, cst: 255
offset: 32, cst: 255
offset: 40, cst: 255
offset: 48, cst: 255
offset: 56, cst: 255
but later we fold:
<bb 2>:
node_name[0] = 255;
node_name[1] = 255;
node_name[2] = 255;
node_name[3] = 255;
node_name[4] = 255;
node_name[5] = 255;
node_name[6] = 255;
node_name[7] = 255;
_14 = MEM[(const u64 *)&node_name];
_15 = __builtin_constant_p (_14);
into false (which is stupid, but conservatively correct modulo the assumption
about IPA passes being consistently weakter than local passes).
Making IPA passes to fold builtin_constant_p call into true is technically
possible, if I add builtin_true and redirect to it, but it would not be very
good if the local passes can not fold above (as the wrong arm is taken).
So can we possibly fix the local passes?
Honza
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Subject: [Bug target/70662] vpbroadcastq assemble failure with -masm=intel -mavx512vbmi
Date: Fri, 15 Apr 2016 13:34:00 -0000
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--- Comment #4 from H.J. Lu <hjl.tools at gmail dot com> ---
The fix is incomplete:
[hjl@gnu-6 gcc]$ /export/build/gnu/gcc-x32/build-x86_64-linux/gcc/xgcc
-B/export/build/gnu/gcc-x32/build-x86_64-linux/gcc/ -mx32 -mtune=slm
-fno-diagnostics-show-caret -fdiagnostics-color=never -Og -fschedule-insns
-fno-tree-fre -mavx512vbmi --param=max-sched-ready-insns=1 -masm=intel -c -o
pr70662.o
/export/gnu/import/git/sources/gcc/gcc/testsuite/gcc.target/i386/pr70662.c
/tmp/ccatFXMU.s: Assembler messages:
/tmp/ccatFXMU.s:240: Error: operand size mismatch for `vpbroadcastd'
[hjl@gnu-6 gcc]$
vpbroadcastd zmm17{k1}, QWORD PTR [esp+184]
>From gcc-bugs-return-522344-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 15 13:35:10 2016
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Subject: [Bug fortran/70673] [5/6 Regression] ICE with module containing functions with allocatable character scalars
Date: Fri, 15 Apr 2016 13:35:00 -0000
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--- Comment #4 from David Kinniburgh <davidgkinniburgh at yahoo dot co.uk> ---
It seems the problem usually arises when there is reassignment in one line, eg
character(:), allocatable: s, t
s = s(2:) ! or even s = s
whereas forcing the temporary
t = s(2:)
s = t
seems to work. But it is not quite that simple as the above doesn't always
fail. It requires other things to be happening too.
>From gcc-bugs-return-522345-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 15 13:37:08 2016
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Subject: [Bug ipa/70646] [4.9/5/6 Regression] Corrupt truncated function
Date: Fri, 15 Apr 2016 13:37:00 -0000
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--- Comment #17 from Josh Poimboeuf <jpoimboe at redhat dot com> ---
(In reply to Richard Biener from comment #14)
> (In reply to Josh Poimboeuf from comment #13)
> > Interestingly, the function's epilogue (frame pointer restore) and return
> > instruction are also getting discarded. Can you tell if that will always be
> > the case when this bug triggers?
>
> I don't think we can rely on that. The path could simply fall thru to
> a random instruction which is still inside the function. Say, if it was
>
> if (x)
> ...
> else
> ...
> foo ();
>
> then the arm marked unreachable would simply disappear.
I tried doing that by putting the offending wwn_to_u64() call in an if
statement, but then the bug disappeared.
In fact, adding *any* code before the call seems to make the bug disappear.
>From gcc-bugs-return-522346-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 15 13:48:43 2016
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Subject: [Bug c/70671] Wrong column number shown for "error: cannot take address of bit-field"
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
I've got a fix (extremely trivial).
>From gcc-bugs-return-522347-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 15 13:50:21 2016
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Subject: [Bug ipa/70646] [4.9/5/6 Regression] Corrupt truncated function
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Jan Hubicka <hubicka at gcc dot gnu.org> changed:
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--- Comment #18 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Jakub: There is indeed aliasing issue, but with -fno-strict-aliasing the bug is
the same.
Apparently this is ipa-prop bug, because ipa-prop does not track size of
accesses and thus it does not know there is a mismatch. The value produced is
thus not INT_MAX as intended but 255. This is Martin's area.
>From gcc-bugs-return-522348-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 15 13:51:57 2016
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Subject: [Bug ipa/70646] [4.9/5/6 Regression] Corrupt truncated function
Date: Fri, 15 Apr 2016 13:51:00 -0000
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--- Comment #19 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Josh: This is limitation of ipa-prop tracking. It very easily gives up on
determinging constantness of aggregate parameter. Hope Martin will fix it next
stage1. WIP patches was done few releases back but not merged so far.
>From gcc-bugs-return-522349-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 15 14:05:05 2016
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Subject: [Bug ipa/70646] [4.9/5/6 Regression] Corrupt truncated function
Date: Fri, 15 Apr 2016 14:05:00 -0000
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--- Comment #20 from Josh Poimboeuf <jpoimboe at redhat dot com> ---
Thanks very much to everyone who has looked into this so far. It would be very
helpful to get answers to the following questions, so we can understand the
impact to the kernel:
1) Is there a reliable way to avoid the bug, either in code or with a gcc flag?
2) Is there a reliable way to detect the bug by looking at the object code?
>From gcc-bugs-return-522350-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 15 14:06:19 2016
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Subject: [Bug target/70682] New: [6 Regression] -fcompare-debug building LLVM with checking=release compiler on ppc64le
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Bug ID: 70682
Summary: [6 Regression] -fcompare-debug building LLVM with
checking=release compiler on ppc64le
Product: gcc
Version: 6.0
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Target: ppc64le
Created attachment 38282
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38282&action=edit
unreduced testcase
On ppc64le running r235027 I get:
trippels@gcc2-power8 llvm_build % g++ --save-temps -fcompare-debug -O3
-fno-devirtualize -c CGStmtOpenMP.gk.ii
g++: error: CGStmtOpenMP.gk.ii: -fcompare-debug failure
trippels@gcc2-power8 llvm_build % diff -u CGStmtOpenMP.gk.gkd
CGStmtOpenMP.gk.gk.gkd
--- CGStmtOpenMP.gk.gkd 2016-04-15 13:59:37.734070548 +0000
+++ CGStmtOpenMP.gk.gk.gkd 2016-04-15 13:59:50.954364032 +0000
@@ -177184,7 +177184,7 @@
(mem/f/c:DI (plus:DI (reg/f:DI 1 1)
(const_int 928 [0x3a0])) [ MEM[(struct
specific_clause_iterator *)&D.xxxx]+0 S8 A128]))# {*movdi_internal64}
(nil))
-(insn # 0 0 (set (reg:V2DI 32 0 [orig:786
vect_begin_iterator_D849456_I_665.9647 ] [786])
+(insn # 0 0 (set (reg:V2DI 32 0 [orig:786
vect_begin_iterator_D849458_I_665.9647 ] [786])
(vec_select:V2DI (mem/c:V2DI (plus:DI (reg/f:DI 1 1)
(reg:DI 10 10 [916])) [ MEM[(struct
specific_clause_iterator *)&D.xxxx]+0 S16 A128])
(parallel [
@@ -177209,12 +177209,12 @@
(nil))
(insn:TI # 0 0 (set (mem/c:V2DI (plus:DI (reg/f:DI 1 1)
(reg:DI 10 10 [917])) [ MEM[(struct specific_clause_iterator
*)&__for_begin]+0 S16 A128])
- (vec_select:V2DI (reg:V2DI 32 0 [orig:786
vect_begin_iterator_D849456_I_665.9647 ] [786])
+ (vec_select:V2DI (reg:V2DI 32 0 [orig:786
vect_begin_iterator_D849458_I_665.9647 ] [786])
(parallel [
(const_int 1 [0x1])
(const_int 0 [0])
])))
/home/trippels/llvm/tools/clang/lib/CodeGen/CGStmtOpenMP.cpp:2355#
{*vsx_stxvd2x2_le_v2di}
- (expr_list:REG_DEAD (reg:V2DI 32 0 [orig:786
vect_begin_iterator_D849456_I_665.9647 ] [786])
+ (expr_list:REG_DEAD (reg:V2DI 32 0 [orig:786
vect_begin_iterator_D849458_I_665.9647 ] [786])
(expr_list:REG_DEAD (reg:DI 10 10 [917])
(nil))))
(jump_insn # 0 0 (set (pc)
>From gcc-bugs-return-522351-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 15 14:07:33 2016
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Subject: [Bug rtl-optimization/21150] Suboptimal byte extraction from 64bits
Date: Fri, 15 Apr 2016 14:07:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=21150
--- Comment #7 from Denis Vlasenko <vda.linux at googlemail dot com> ---
Fixed at least in 4.7.2, maybe earlier. With -m32 -fomit-frame-pointer -O2:
a: movzbl v+45, %eax
xorb v+36, %al
xorb v, %al
xorb v+54, %al
xorb v+63, %al
xorb v+9, %al
xorb v+18, %al
xorb v+27, %al
ret
b: movzbl v+18, %eax
xorb v+9, %al
xorb v, %al
xorb v+27, %al
xorb v+36, %al
xorb v+45, %al
xorb v+54, %al
xorb v+63, %al
ret
c: movzbl v+9, %eax
xorb v, %al
xorb v+18, %al
xorb v+27, %al
xorb v+36, %al
xorb v+45, %al
xorb v+54, %al
xorb v+63, %al
ret
d: movzbl v+18, %eax
xorb v+9, %al
xorb v, %al
xorb v+27, %al
xorb v+36, %al
xorb v+45, %al
xorb v+54, %al
xorb v+63, %al
ret
With same but -Os, my only complaint is that word-sized XORs are needlessly
adding partial register update stalls:
d: movb v+18, %al
xorb v+9, %al
xorl v, %eax
xorb v+27, %al
xorl v+36, %eax
xorb v+45, %al
xorb v+54, %al
xorb v+63, %al
ret
but overall it looks much better. Feel free to close this BZ.
>From gcc-bugs-return-522352-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 15 14:31:28 2016
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug sanitizer/70683] New: [6 Regression] -fcompare-debug bug with -fsanitizedress
Date: Fri, 15 Apr 2016 14:31:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70683
Bug ID: 70683
Summary: [6 Regression] -fcompare-debug bug with
-fsanitize=address
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: sanitizer
Assignee: unassigned at gcc dot gnu.org
Reporter: jakub at gcc dot gnu.org
CC: dodji at gcc dot gnu.org, dvyukov at gcc dot gnu.org,
jakub at gcc dot gnu.org, kcc at gcc dot gnu.org
Target Milestone: ---
On a testcase that has been provided privately to me and I can't share (and
that can't be easily reduced), I'm seeing differences in sanopt optimization,
without -gtoggle ASAN_CHECK is optimized away, while with -gtoggle it is.
maybe_optimize_asan_check_ifn works with a hash_map using tree_operand_hash.
What I'm seeing is that in both cases we first process ASAN_CHECK with ptr
&m_nullId.m_id
which is ADDR_EXPR of COMPONENT_REF of VAR_DECL, and then later on there is
ASAN_CHECK with ptr
&m_nullId.m_id
which is actually ADDR_EXPR of COMPONENT_REF of MEM_REF of ADDR_EXPR of
VAR_DECL.
The FIELD_DECL and VAR_DECL in both cases are the same.
Now, because of the VAR_DECL vs. MEM_REF[&VAR_DECL, 0] difference both hash
differently using iterative_hash_expr.
Unlike the hash, the comparison is done using operand_equal_p (, , 0), which
has:
2833 else if (flags & OEP_ADDRESS_OF)
2834 {
2835 /* If we are interested in comparing addresses ignore
2836 MEM_REF wrappings of the base that can appear just for
2837 TBAA reasons. */
2838 if (TREE_CODE (arg0) == MEM_REF
2839 && DECL_P (arg1)
2840 && TREE_CODE (TREE_OPERAND (arg0, 0)) == ADDR_EXPR
2841 && TREE_OPERAND (TREE_OPERAND (arg0, 0), 0) == arg1
2842 && integer_zerop (TREE_OPERAND (arg0, 1)))
2843 return 1;
2844 else if (TREE_CODE (arg1) == MEM_REF
2845 && DECL_P (arg0)
2846 && TREE_CODE (TREE_OPERAND (arg1, 0)) == ADDR_EXPR
2847 && TREE_OPERAND (TREE_OPERAND (arg1, 0), 0) == arg0
2848 && integer_zerop (TREE_OPERAND (arg1, 1)))
2849 return 1;
2850 return 0;
2851 }
and thus returns that the two are equal. While both of the decls in here
(VAR_DECL and FIELD_DECL) have the same DECL_UID for no -gtoggle vs. -gtoggle,
I presume the problem is that there are other tree expressions pushed into the
hash_map as keys that have some DECL_UID differences somewhere, in any case
both the hash maps have the same number of elements, but report different
number of collisions (note debug stmts never query anything, so that is not the
issue).
So, I believe the bug is that we have a hash function that can return different
hashes even for objects that compare equal by the comparison function, so it is
then by pure luck if we find a match or not.
IMHO the right solution would be to have next to operand_equal_p a hashing
function that guarantees that if operand_equal_p returns true on two tree
expressions, then they have the same hash.
As short term, perhaps (maybe just for sanopt, as that is where the problem is
reported), we could use a comparison function that compares both the hash
values and operand_equal_p, i.e. tree expressions that hash differently would
never compare equal. This can be done either by remembering also the hash
value, or just computing iterative_hash_expr each time.
>From gcc-bugs-return-522353-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 15 14:31:45 2016
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Subject: [Bug sanitizer/70683] [6 Regression] -fcompare-debug bug with -fsanitizedress
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-15
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Ever confirmed|0 |1
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Subject: [Bug ipa/70646] [4.9/5/6 Regression] Corrupt truncated function
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--- Comment #21 from rguenther at suse dot de <rguenther at suse dot de> ---
On April 15, 2016 3:31:33 PM GMT+02:00, "hubicka at gcc dot gnu.org"
<gcc-bugzilla@gcc.gnu.org> wrote:
>https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70646
>
>--- Comment #16 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
>> Honza? This seems to be somewhat fragile (redirecting things to
>unreachable
>> but _not_ changing the actual predicates in the IL). Claiming the
>> predicate is constant true is also a bit bogus (as can be seen in
>following
>> optimization).
>
>At WPA stage inliner can not update IL, so it simply redirects to
>builtin_unreachable if predicate is FALSE and expects scalar passes to
>be
>monotonously smarter than IPA analysis.
>
>BB3 predicate true is conservatively correct: there is no predicate to
>represent that something is not constant because we assume scalar
>optimizers to
>possibly be stronger than us and decide better.
>
>Here we manage to assume that builtin_constant_p is true and thus we
>conclude
>the following BB is unreachable:
>BB 4 predicate:(op0[ref offset: 0] not constant)
>
>iftmp.0_26 = __builtin_bswap64 (_3);
>
> freq:0.61 size: 1 time: 1
>This is because ipa-prop analyzes the values in node_name:
>
>Jump functions of caller broken/2:
>
>callsite broken/2 -> wwn_to_u64/1 :
>
>param 0: UNKNOWN
>
>Aggregate passed by reference:
> offset: 0, cst: 255
> offset: 8, cst: 255
> offset: 16, cst: 255
> offset: 24, cst: 255
> offset: 32, cst: 255
> offset: 40, cst: 255
> offset: 48, cst: 255
> offset: 56, cst: 255
>
>but later we fold:
>
><bb 2>:
>
>node_name[0] = 255;
>
>node_name[1] = 255;
>
>node_name[2] = 255;
>
>node_name[3] = 255;
>
>node_name[4] = 255;
>
>node_name[5] = 255;
>
>node_name[6] = 255;
>
>node_name[7] = 255;
>
>_14 = MEM[(const u64 *)&node_name];
>
>_15 = __builtin_constant_p (_14);
>
>
>into false (which is stupid, but conservatively correct modulo the
>assumption
>about IPA passes being consistently weakter than local passes).
>
>Making IPA passes to fold builtin_constant_p call into true is
>technically
>possible, if I add builtin_true and redirect to it, but it would not be
>very
>good if the local passes can not fold above (as the wrong arm is
>taken).
>
>So can we possibly fix the local passes?You can't rely on this happening, consider -fno-foo.
So my original local hack was to not do this built-in constant stuff for
is_refp
Richard.
>Honza
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Subject: [Bug c/70671] Wrong column number shown for "error: cannot take address of bit-field"
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--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Fri Apr 15 14:46:06 2016
New Revision: 235032
URL: https://gcc.gnu.org/viewcvs?rev=235032&root=gcc&view=rev
Log:
PR c/70671
* c-typeck.c (build_unary_op): Pass location down to error and
warning call.
* gcc.dg/bitfld-22.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/bitfld-22.c
Modified:
trunk/gcc/c/ChangeLog
trunk/gcc/c/c-typeck.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c/70671] Wrong column number shown for "error: cannot take address of bit-field"
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
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Target Milestone|--- |6.0
--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug sanitizer/70683] [6 Regression] -fcompare-debug bug with -fsanitizedress
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I guess most or all hash tables using iterative_hash_expr as hashing function
and operand_equal_p as comparison function are affected.
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Subject: [Bug c++/70594] [6 Regression] -fcompare-debug failure
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--- Comment #51 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Apr 15 14:51:06 2016
New Revision: 235033
URL: https://gcc.gnu.org/viewcvs?rev=235033&root=gcc&view=rev
Log:
PR c++/70594
* constexpr.c (constexpr_call_table): Preserve in GC.
(struct fundef_copy, struct fundef_copies_table_t): Delete.
(fundef_copies_table): Preserve in GC. Change to pointer to
tree->tree hash.
(maybe_initialize_fundef_copies_table): Adjust.
(get_fundef_copy): Return a TREE_LIST. Use non-inserting search.
(save_fundef_copy): Adjust for a TREE_LIST.
(cxx_eval_call_expression): Adjust for a fundef_copy TREE_LIST.
(fini_constexpr): New.
* cp-tree.h (fini_constexpr): Declare.
* decl2.c (c_parse_final_cleanups): Call fini_constexpr.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/cp/constexpr.c
trunk/gcc/cp/cp-tree.h
trunk/gcc/cp/decl2.c
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Subject: [Bug target/70662] vpbroadcastq assemble failure with -masm=intel -mavx512vbmi
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--- Comment #5 from Kirill Yukhin <kyukhin at gcc dot gnu.org> ---
Author: kyukhin
Date: Fri Apr 15 15:13:42 2016
New Revision: 235037
URL: https://gcc.gnu.org/viewcvs?rev=235037&root=gcc&view=rev
Log:
AVX-512, Fix mode size check.
PR target/70662
gcc/
* config/i386/sse.md(define_insn "<avx512>_vec_dup<mode><mask_name>"):
Fix mode size check.
Modified:
branches/gcc-5-branch/gcc/ChangeLog
branches/gcc-5-branch/gcc/config/i386/sse.md
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Subject: [Bug target/70662] vpbroadcastq assemble failure with -masm=intel -mavx512vbmi
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--- Comment #6 from Kirill Yukhin <kyukhin at gcc dot gnu.org> ---
Author: kyukhin
Date: Fri Apr 15 15:17:31 2016
New Revision: 235038
URL: https://gcc.gnu.org/viewcvs?rev=235038&root=gcc&view=rev
Log:
AVX-512. Fix mode size check.
PR target/70662
gcc/
* config/i386/sse.md(define_insn "<avx512>_vec_dup<mode><mask_name>"):
Fix mode size check.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/sse.md
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Subject: [Bug target/70662] vpbroadcastq assemble failure with -masm=intel -mavx512vbmi
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--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Apr 15 15:53:01 2016
New Revision: 235040
URL: https://gcc.gnu.org/viewcvs?rev=235040&root=gcc&view=rev
Log:
PR target/70662
* config/i386/sse.md (define_insn "<avx512>_vec_dup<mode><mask_name>"):
Fix mode size check.
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/config/i386/sse.md
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From: "mstahl at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/64329] Crash when returning reference from lambda with deduced type
Date: Fri, 15 Apr 2016 16:20:00 -0000
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Michael Stahl <mstahl at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mstahl at redhat dot com
--- Comment #1 from Michael Stahl <mstahl at redhat dot com> ---
i believe i've hit the same problem, here's the footgun reproducer i came up
with:
#include <functional>
#include <cstdio>
int foo = 42;
int const& bar()
{
return foo;
}
int main()
{
std::function<int const& ()> f{ [] () { return bar(); } };
int const& rfoo = f();
printf("%p %p\n", (void*)&foo, (void*)&rfoo);
return &foo == &rfoo;
}
this is g++ (GCC) 5.3.1 20160406 (Red Hat 5.3.1-6)
> g++ -std=c++11 -Wall -Wextra -pedantic -Weffc++ -W lambdaref.cc && ./a.out
0x60204c (nil)
the problem is that the deduced return type of the lambda is a value
type, never a reference type. this caught me by surprise, but it's
the same rule as for "auto".
if the C++ committee has to make surprising and error-prone type
inference rules, then at least implementations like g++ could
give a warning about returning a reference from a lambda that
is implicitly copied to a value, only to be implicitly converted
again into nothing.
Visual Studio 2013 gives a "warning C4172 returning address of local
variable or temporary" from somewhere inside its std::function code.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70505] [4.9/5/6/7 Regression] Constexpr failure when template type specified
Date: Fri, 15 Apr 2016 16:33:00 -0000
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--- Comment #2 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Fri Apr 15 16:32:22 2016
New Revision: 235042
URL: https://gcc.gnu.org/viewcvs?rev=235042&root=gcc&view=rev
Log:
PR c++/70505
* pt.c (tsubst_baselink): Give the new TEMPLATE_ID_EXPR
unknown_type_node, too.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-template10.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/pt.c
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Subject: [Bug c++/64329] Crash when returning reference from lambda with deduced type
Date: Fri, 15 Apr 2016 16:39:00 -0000
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Michael Stahl from comment #1)
> i believe i've hit the same problem
I don't think so. The original bug report is for 4.9.3, and seems to be an
actual compiler bug that is fixed already in GCC 5 and later.
Your case is invalid code. While I agree a warning would be nice, it's not the
same as a bug in 4.9.3 that has been fixed.
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Subject: [Bug c++/64329] Crash when returning reference from lambda with deduced type
Date: Fri, 15 Apr 2016 16:41:00 -0000
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Oops, the original report was for 4.9.1, but the bug is still present in 4.9.3
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From: "trippels at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70682] [6/7 Regression] -fcompare-debug building LLVM with checking=release compiler on ppc64le
Date: Fri, 15 Apr 2016 16:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70682
Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #1 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
The issue was fixed by r235033. Closing.
>From gcc-bugs-return-522367-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 15 16:53:07 2016
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From: "ajmay81 at googlemail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libfortran/70684] New: incorrect reading of values from file on Windows
Date: Fri, 15 Apr 2016 16:53:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70684
Bug ID: 70684
Summary: incorrect reading of values from file on Windows
Product: gcc
Version: 5.3.0
Status: UNCONFIRMED
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Priority: P3
Component: libfortran
Assignee: unassigned at gcc dot gnu.org
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When writing and then reading back values from a file on Windows (program built
with gfortran via mxe cross compiler) the wrong values are read. Here is a
trivial example:
program test
implicit none
integer,parameter :: isize=12
integer,parameter :: funit=12
integer :: i
double precision, dimension(isize) :: a
do i=1,isize
a(i)=dble(i)
enddo
write(6,*)'Value to write'
do i=1,isize
write(6,*)a(i)
enddo
open(funit,file='test.txt')
write(funit,'(1x,6(f25.20,'',''))') (a(i),i=1,isize)
close(funit)
do i=1,isize
a(i)=0d0
enddo
open(funit,file='test.txt')
read(funit,*) (a(i),i=1,isize)
close(funit)
write(6,*)'Values after read'
do i=1,isize
write(6,*)a(i)
enddo
end
And compiled with:
x86_64-w64-mingw32.static-gfortran test.f90
On Linux the values 1-12 are read, but on Windows the values 1-6,0,7-11 are
read. It seems that the file is written with Windows line endings on Windows,
but when read Linux line endings are expected. I think it should be consistent,
at least one should be able to read files back on the same system they are
generated.
I grepped through a recent 5.3.0 tarball, and it's a bit of a guess but in
libgfortran/io/transfer.c the function next_record_r() knows only about '\n'
line endings, yet it's opposite number next_record_w() knows about both '\n'
and '\r' - so perhaps the same logic just needs copying to the read function?
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--- Comment #10 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Fri Apr 15 17:03:33 2016
New Revision: 235043
URL: https://gcc.gnu.org/viewcvs?rev=235043&root=gcc&view=rev
Log:
PR c++/67164
* pt.c (copy_template_args): New.
(tsubst_pack_expansion): Use it.
Added:
branches/gcc-5-branch/gcc/testsuite/g++.dg/cpp0x/variadic-tuple2.C
Modified:
branches/gcc-5-branch/gcc/cp/ChangeLog
branches/gcc-5-branch/gcc/cp/pt.c
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Subject: [Bug c/70668] nds32-elf toolchain fails to compile on OSX
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--- Comment #4 from Stefan Reinauer <stefan.reinauer at coreboot dot org> ---
Thanks to Segher Boessenkool, https://review.coreboot.org/#/c/14380/2 fixes the
issue.
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Subject: [Bug c/70668] nds32-elf toolchain fails to compile on OSX
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--- Comment #5 from Stefan Reinauer <stefan.reinauer at coreboot dot org> ---
Created attachment 38283
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38283&action=edit
Fix for the issue
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Subject: [Bug libstdc++/65434] Memory leak in pool constructor
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Patrick J. LoPresti <lopresti at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |lopresti at gmail dot com
--- Comment #5 from Patrick J. LoPresti <lopresti at gmail dot com> ---
Seems pretty sloppy not to free what you allocate, and then demand all leak
checking tools forever work around the sloppiness... Even if you are the
runtime.
Couldn't you fix this by using the init_priority attribute on emergency_pool?
Alternatively, do like any application would and use a Meyers singleton instead
of a global variable? Like so:
namespace {
pool &emergency_pool()
{
static pool emp;
return emp;
}
}
Since destructors always run in the opposite order of construction, you would
just need to make sure you obtain the first reference early enough.
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Subject: [Bug c++/70685] New: [6/7 Regression] ICE: Segmentation fault
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Bug ID: 70685
Summary: [6/7 Regression] ICE: Segmentation fault
Product: gcc
Version: 6.0
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Created attachment 38284
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unreduced testcase
A very recent regression. Was fine a yesterday.
markus@x4 /tmp % clang++ -std=c++14 -c sum.ii
markus@x4 /tmp % g++ -c sum.ii
In file included from ../libs/hana/test/range/sum.cpp:9:0:
../boost/hana/range.hpp: In instantiation of ‘static constexpr auto
boost::hana::sum_impl<boost::hana::range_tag>::apply(const
boost::hana::range<T, from, to>&) [with <template-parameter-1-1> =
boost::hana::integral_constant_tag<int>; T = int; T from = -3; T to = -1]’:
../boost/hana/sum.hpp:45:42: required from ‘constexpr decltype(auto)
boost::hana::sum_t<M>::operator()(Xs&&) const [with Xs =
boost::hana::range<int, -3, -1>; M = boost::hana::integral_constant_tag<int>]’
../libs/hana/test/range/sum.cpp:23:102: required from here
../boost/hana/range.hpp:187:61: in constexpr expansion of
‘boost::hana::sum_impl<boost::hana::range_tag>::sum_helper<int>(-3, (-1 - 1))’
../boost/hana/range.hpp:182:35: in constexpr expansion of
‘boost::hana::sum_impl<boost::hana::range_tag>::sum_helper<int>((- n), (- m))’
../boost/hana/range.hpp:187:20: internal compiler error: Segmentation fault
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Subject: [Bug c/70686] New: -fprofile-generate (not fprofile-use) somehow produces much faster binary
Date: Fri, 15 Apr 2016 18:36:00 -0000
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Bug ID: 70686
Summary: -fprofile-generate (not fprofile-use) somehow produces
much faster binary
Product: gcc
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Target Milestone: ---
I have this small benchmark that does 100mn loops of 20 divisions by 2.
Periodically it bumps up the values so that it continues to have something to
divide /2. I time this and see the results.
-------------------------------
<start of code>
#include <math.h>
#include <stdio.h>
#include <time.h>
int main()
{
printf("\n");
const double a = 3333333.3456743289; //initial randomly assigned values to
start halving
const double aa = 4444555.444334244;
const double aaa = 6666777.66666666;
const double aaaa = 32769999.123458;
unsigned int i;
double score;
double g; //the number to be used for making the divisions, so essentially
halving everything each round
double b;
double bb;
double bbb;
double bbbb;
g = 2;
b = a;
bb = aa;
bbb = aaa;
bbbb = aaaa;
double total_time;
clock_t start, end;
start = 0;
end = 0;
score = 0;
start = clock();
for (i = 1; i <100000001; i++)
{
b=b/g;
b=b/g;
b=b/g;
b=b/g;
b=b/g;
bb=bb/g;
bb=bb/g;
bb=bb/g;
bb=bb/g;
bb=bb/g;
bbb=bbb/g;
bbb=bbb/g;
bbb=bbb/g;
bbb=bbb/g;
bbb=bbb/g;
bbbb=bbbb/g;
bbbb=bbbb/g;
bbbb=bbbb/g;
bbbb=bbbb/g;
bbbb=bbbb/g;
if (b < 1.0000001) {b=b+i+12.432432432;} //just adding more stuff in
order for the number
if (bb < 1.0000001) {bb=bb+i+15.4324442;} //to return back to larger
values after several
if (bbb < 1.0000001) {bbb=bbb+i+19.42884;} //rounds of halving
if (bbbb < 1.0000001) {bbbb=bbbb+i+34.481;}
}
end = clock();
total_time = ((double) (end - start)) / CLOCKS_PER_SEC * 1000;
score = (10000000 / total_time);
printf("\nFinal number: %0.20f", (b+bb+bbb+bbbb));
printf("\nTime elapsed: %0.0f msecs", total_time);
printf("\nScore: %0.0f\n", score);
return 0;
}
-----------------------
<end of code>
This is run on a quad q8200 @ 1.75ghz
Now notice the times:
gcc Maths4asm.c -lm -O0 => 6224ms
gcc Maths4asm.c -lm -O2 and -O3 => 1527ms
gcc Maths4asm.c -lm -Ofast => 1227ms
gcc Maths4asm.c -lm -Ofast -march=nocona => 1236ms
gcc Maths4asm.c -lm -Ofast -march=core2 => 1197ms (I have a core quad,
technically it's core2 arch)
gcc Maths4asm.c -lm -Ofast -march=core2 -fprofile-generate => 624ms.
gcc Maths4asm.c -lm -Ofast -march=nocona -fprofile-generate => 530ms.
gcc Maths4asm.c -lm -Ofast -march=nocona -fprofile-use => 1258ms (slower than
without PGO, slower than -fprofile-generate)
gcc Maths4asm.c -lm -Ofast -march=core2 -fprofile-use => 1222ms (slower than
without PGO, slower than -fprofile-generate).
So PGO optimization made it worse, but the most mindblowing thing is the
running of the profiler, getting execution times down to 530ms. The profiler
run (-generate) should normally take this to 4000-5000ms or above, as it
monitors the process to create a log file.
I have never run into a -fprofile-generate build that wasn't at least 2-3 times
slower than a normal build - let alone 2-3 times faster. This is totally
absurd.
And then, to top it all, -fprofile-use (using the logfile to create the best
binary) created worse binaries.
Oh, and "nocona" (pentium4+) suddenly became ...the better architecture instead
of core2.
This stuff is almost unbelievable. I thought initially that the profiler must
be activating multithreading, but no. I scripted simultaneous use of 4 runs,
they all give the same time - that means, there was no extra cpu use in other
threads.
The implication of all these is that if -fprofile-generate can somehow give
code that is executing at 500ms, and the non -fprofile-generate binaries are
running at 1200ms, then serious performance is left on the table on normal
builds.
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Subject: [Bug c++/70685] [6/7 Regression] ICE: Segmentation fault
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--- Comment #1 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
markus@x4 tmp % cat sum.ii
namespace std {
template <typename _Tp, _Tp __v> struct A { static constexpr _Tp value = __v;
};
typedef A<bool, false> false_type;
template <bool, typename _Iftrue, typename> using conditional_t = _Iftrue;
namespace hana {
template <typename> struct is_default : false_type {};
template <typename> struct tag_of;
struct deleted_implementation;
namespace detail {
namespace operators {
template <typename> struct adl {};
}
}
template <typename> struct B;
template <int v> struct G : std::A<int, v> {};
template <typename T, T v> G<v> integral_c;
template <int i> using int_ = G<i>;
template <int i> int_<i> int_c;
template <typename> struct C;
template <typename Tag> struct D {
template <typename... X> auto operator()(X... x) {
return C<Tag>::apply(x...);
}
};
template <typename Tag> D<Tag> make;
template <typename> struct unpack_impl;
struct Foldable {
using Tag = int;
static constexpr int value = is_default<unpack_impl<Tag>>::value;
};
struct range_tag;
auto make_range = make<range_tag>;
template <typename> struct sum_impl;
template <typename> struct F;
template <typename M = B<int>> F<M> sum;
template <typename T, T, T To>
struct range : detail::operators::adl<range<T, 0, To>> {};
template <typename T, T From, T To> struct tag_of<range<T, From, To>> {
using type = range_tag;
};
template <> struct C<range_tag> {
template <typename From, typename To> static auto apply(From, To) {
using T = int;
constexpr T from(From::value);
constexpr T to(To::value);
return range<T, from, to>{};
}
};
template <> struct sum_impl<range_tag> {
template <typename I> static constexpr I sum_helper(I m, I n) {
if (m == n)
return 0;
return sum_helper(0, 0);
}
template <typename T, T from, T to> static auto apply(range<T, from, to>) {
integral_c<T, sum_helper(from, to - 1)>;
}
};
template <typename> struct F {
template <typename Xs> auto operator()(Xs xs) {
using S = typename tag_of<Xs>::type;
using Sum =
conditional_t<Foldable::value, sum_impl<S>, deleted_implementation>;
Sum::apply(xs);
}
};
}
auto __hana_tmp_22 =
(hana::sum<>(hana::make_range(hana::int_c<-3>, hana::int_c<-2>)),
hana::sum<>(hana::make_range(hana::int_c<3>, hana::int_c<7>)),
hana::int_c<6>);
}
>From gcc-bugs-return-522376-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 15 19:10:39 2016
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Subject: [Bug c/20562] no unused warning for static const arrays
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
CC| |msebor at gcc dot gnu.org
Known to work| |6.0
Resolution|--- |DUPLICATE
Known to fail| |4.0.0, 4.5.3, 4.8.3, 4.9.3,
| |5.3.0
--- Comment #9 from Martin Sebor <msebor at gcc dot gnu.org> ---
This has been resolved in 6.0 via the -Wunused-const-variable option (see bug
28901).
*** This bug has been marked as a duplicate of bug 28901 ***
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What |Removed |Added
----------------------------------------------------------------------------
CC| |mueller at kde dot org
--- Comment #38 from Martin Sebor <msebor at gcc dot gnu.org> ---
*** Bug 20562 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-522377-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 15 19:15:03 2016
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Subject: [Bug c/69960] "initializer element is not constant"
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What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-15
Ever confirmed|0 |1
Severity|normal |enhancement
--- Comment #11 from Martin Sebor <msebor at gcc dot gnu.org> ---
Seems like there is agreement that this would be a useful enhancement so I'll
mark this enhancement request as accepted by changing its Status to New (and
its Severity to Enhancement).
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Subject: [Bug c/54823] string literal characters not a constant expression
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What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Last reconfirmed| |2016-4-15
CC| |msebor at gcc dot gnu.org
Resolution|--- |DUPLICATE
Summary|string literal characters |string literal characters
|not constant |not a constant expression
Severity|normal |enhancement
--- Comment #6 from Martin Sebor <msebor at gcc dot gnu.org> ---
I think this request is a duplicate of bug 69960 (or rather the other way
around). Since, based on the feedback of other GCC developers, I've just
confirmed the request in the other bug I'll close this one as a duplicate of
the other.
*** This bug has been marked as a duplicate of bug 69960 ***
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----------------------------------------------------------------------------
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--- Comment #12 from Martin Sebor <msebor at gcc dot gnu.org> ---
*** Bug 54823 has been marked as a duplicate of this bug. ***
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Subject: [Bug ipa/70646] [4.9/5/6/7 Regression] Corrupt truncated function
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--- Comment #22 from Martin Jambor <jamborm at gcc dot gnu.org> ---
(In reply to Jan Hubicka from comment #18)
> Jakub: There is indeed aliasing issue, but with -fno-strict-aliasing the bug
> is the same.
>
> Apparently this is ipa-prop bug, because ipa-prop does not track size of
> accesses and thus it does not know there is a mismatch. The value produced
> is thus not INT_MAX as intended but 255. This is Martin's area.
ipa-prop does not track accesses or their sizes, inlining predicate
conditions do.
Anyway, I checked the two places where access sizes need to be checked
(i.e. ipcp_modif_dom_walker::before_dom_children in ipa-prop.c and
evaluate_conditions_for_known_args in ipa-inline-analysis.c) and they
actually are checked, with one exception causing this bug.
The exception is evaluating IS_NOT_CONSTANT and CHANGED types of
conditions in evaluate_conditions_for_known_args, which does not check
access size for them because the size is not even tracked for them
(for normal conditions, size is the size of the stored value to
compare with).
I suppose the easiest fix is to overload the value field to store the
size of the access for these two codes and then add the missing check.
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Subject: [Bug c/59976] Spurious warning on converting const int variable to unsigned long (Also inconsistency between O0 and O1)
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-15
CC| |msebor at gcc dot gnu.org
Ever confirmed|0 |1
Known to fail| |4.9.3, 5.3.0, 6.0
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed. The warning is also inconsistent between C and C++ modes, likely
because G++ treats the constant b as a constant expression regardless of
optimization while GCC treats it as an ordinary variable with an unknown value
(i.e., it doesn't fold its value without optimization).
This would be solved by making GCC more aggressive about constant folding and
treating more expressions as constant expressions, as requested for example in
bug 69960. It might be worth to collect the kinds of expressions that could be
considered constant so that they can all be considered at the same time if/when
someone decides to put together a patch for one (or more) of these bugs.
$ cat v.c && gcc -S -Wconversion -xc v.c
unsigned g;
void fn1() {
int a;
const unsigned char b = 0;
a = b & g;
}
v.c: In function ‘fn1’:
v.c:5:7: warning: conversion to ‘int’ from ‘unsigned int’ may change the sign
of the result [-Wsign-conversion]
a = b & g;
^
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Subject: [Bug c++/70685] [6/7 Regression] ICE: Segmentation fault
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Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-15
CC| |jakub at gcc dot gnu.org,
| |nathan at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #2 from Jason Merrill <jason at gcc dot gnu.org> ---
Broken by r235033, the constexpr call GC patch.
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Subject: [Bug c++/70685] [6/7 Regression] ICE: Segmentation fault
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Jason Merrill <jason at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Subject: [Bug c++/70685] [6/7 Regression] ICE: Segmentation fault
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--- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Fri Apr 15 19:47:19 2016
New Revision: 235045
URL: https://gcc.gnu.org/viewcvs?rev=235045&root=gcc&view=rev
Log:
PR c++/70685
* constexpr.c (get_fundef_copy): Handle null *slot.
Added:
trunk/gcc/testsuite/g++.dg/cpp1y/constexpr-hana1.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/constexpr.c
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Subject: [Bug c++/70685] [6/7 Regression] ICE: Segmentation fault
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--- Comment #4 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Fri Apr 15 19:53:03 2016
New Revision: 235046
URL: https://gcc.gnu.org/viewcvs?rev=235046&root=gcc&view=rev
Log:
PR c++/70685
* constexpr.c (get_fundef_copy): Handle null *slot.
Added:
branches/gcc-6-branch/gcc/testsuite/g++.dg/cpp1y/constexpr-hana1.C
Modified:
branches/gcc-6-branch/gcc/cp/ChangeLog
branches/gcc-6-branch/gcc/cp/constexpr.c
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Subject: [Bug rtl-optimization/70687] New: Undefined shift in change_zero_ext in combine.c
Date: Fri, 15 Apr 2016 20:22:00 -0000
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Bug ID: 70687
Summary: Undefined shift in change_zero_ext in combine.c
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
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change_zero_ext in combine.c has
else if (GET_CODE (x) == ZERO_EXTEND
&& GET_CODE (XEXP (x, 0)) == SUBREG
&& GET_MODE (SUBREG_REG (XEXP (x, 0))) == mode
&& subreg_lowpart_p (XEXP (x, 0)))
{
size = GET_MODE_PRECISION (GET_MODE (XEXP (x, 0)));
x = SUBREG_REG (XEXP (x, 0));
}
else
continue;
unsigned HOST_WIDE_INT mask = 1;
mask <<= size;
mask--;
x = gen_rtx_AND (mode, x, GEN_INT (mask));
For
(gdb) call debug_rtx (*src)
(zero_extend:TI (subreg:DI (reg/v:TI 91 [ ixi ]) 0))
we got
(gdb) call debug_rtx (*src)
(zero_extend:TI (subreg:DI (reg/v:TI 91 [ ixi ]) 0))
(gdb) p size
$9 = 64
(gdb) p sizeof (mask)
$10 = 8
mask <<= size;
is wrong here, which leads to
(and:TI (reg/v:TI 91 [ ixi ])
(const_int 0 [0]))
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Subject: [Bug ipa/70646] [4.9/5/6/7 Regression] Corrupt truncated function
Date: Fri, 15 Apr 2016 20:27:00 -0000
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--- Comment #23 from Martin Jambor <jamborm at gcc dot gnu.org> ---
(In reply to Josh Poimboeuf from comment #20)
> Thanks very much to everyone who has looked into this so far. It would be
> very helpful to get answers to the following questions, so we can understand
> the impact to the kernel:
>
> 1) Is there a reliable way to avoid the bug, either in code or with a gcc
> flag?
If you mean in general, then unfortunately no, except for disabling
inlining altogether and removing all always_inline's. In addition to
the main bug, I found out that I check --param ipa-max-agg-items only
after incrementing it, so even setting that to zero does not help.
I'll prepare a patch for that too.
If you want to avoid it at a particular place where you know it
already occurs, then it depends on how the code looks like. Would for
the following work for you?
void __attribute__((noinline,noclone)) broken(u64* shost)
{
u8 node_name[8];
memset (&node_name, 0xFF, sizeof (node_name));
*shost = wwn_to_u64(node_name);
}
>
> 2) Is there a reliable way to detect the bug by looking at the object code?
I cannot think of any.
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Subject: [Bug rtl-optimization/70687] Undefined shift in change_zero_ext in combine.c
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-15
Ever confirmed|0 |1
--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
This works for me:
diff --git a/gcc/combine.c b/gcc/combine.c
index 1d0e8be..197b9da 100644
--- a/gcc/combine.c
+++ b/gcc/combine.c
@@ -11101,6 +11101,9 @@ change_zero_ext (rtx *src)
&& subreg_lowpart_p (XEXP (x, 0)))
{
size = GET_MODE_PRECISION (GET_MODE (XEXP (x, 0)));
+ /* Check for undefined shift. */
+ if (size >= HOST_BITS_PER_WIDE_INT)
+ continue;
x = SUBREG_REG (XEXP (x, 0));
}
else
>From gcc-bugs-return-522389-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 15 20:27:20 2016
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Subject: [Bug c/59562] __builtin_assume_aligned loses constness when used as initializer element
Date: Fri, 15 Apr 2016 20:27:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-15
CC| |msebor at gcc dot gnu.org
Ever confirmed|0 |1
Known to fail| |4.8.3, 4.9.3, 5.3.0, 6.0
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
I agree that the builtin should evaluate to a constant expression when its
argument does. The same could be said about many other builtins as well (see
for example bug 68120, and the C++ bug 70507).
Confirmed:
$ cat v.c && gcc -S -Wall -Wextra -Wpedantic -xc v.c
int i = 0;
int *p = &i;
void *q = __builtin_assume_aligned (p, 4);
v.c:3:11: error: initializer element is not constant
void *q = __builtin_assume_aligned (p, 4);
^~~~~~~~~~~~~~~~~~~~~~~~
>From gcc-bugs-return-522390-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 15 20:34:37 2016
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Subject: [Bug c/41138] Inconsistent (incorrect?) "overflow in implicit constant conversion" warning
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-15
Ever confirmed|0 |1
Known to fail| |4.0.0, 4.5.3, 4.8.3, 4.9.3,
| |5.3.0, 6.0
--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
Since there is at least one other report complaining about this warning (bug
59753) I'll confirm it as a bug.
>From gcc-bugs-return-522391-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 15 20:35:42 2016
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Subject: [Bug c/59753] -Woverflow warning inconsistency with signed constant conversion between T_MAX+1 and UT_MAX vs larger than UT_MAX
Date: Fri, 15 Apr 2016 20:35:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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Last reconfirmed| |2016-04-15
CC| |msebor at gcc dot gnu.org
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--- Comment #7 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirming for the inconsistency. See also bug 41138 for what might be a
related or even the same problem.
>From gcc-bugs-return-522392-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 15 20:37:21 2016
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Subject: [Bug libfortran/70684] incorrect reading of values from file on Windows
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Jerry DeLisle <jvdelisle at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |jvdelisle at gcc dot gnu.org
--- Comment #1 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
You are doing list direct reads here. You will see where /r is treated as a
separator. Regardless, this has all worked before without a problem, so it may
be your build of gcc has a problem.
I will investigate here a bit with your test case and get back to you.
>From gcc-bugs-return-522393-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 15 20:42:18 2016
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From: "cesar at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/70688] New: bogus OpenACC data clause errors involving reductions
Date: Fri, 15 Apr 2016 20:42:00 -0000
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Bug ID: 70688
Summary: bogus OpenACC data clause errors involving reductions
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Keywords: openacc
Severity: normal
Priority: P3
Component: c
Assignee: cesar at gcc dot gnu.org
Reporter: cesar at gcc dot gnu.org
CC: tschwinge at gcc dot gnu.org
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Created attachment 38285
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38285&action=edit
test case
Here is the output of the attached test case when it is build with -fopenacc:
tr1.c: In function ‘sum’:
tr1.c:12:9: error: ‘s’ appears both in data and map clauses
#pragma acc parallel num_gangs (10) copy (s) reduction (+:s)
^~~
There are two problems with this. 1) the c FE should not be reporting a data
map clause error on a reduction variable. 2) That error only gets detected some
of the time, depending on the ordering of the clauses (e.g. a data clause
involving variable 'v' appears before a reduction clause involving 'v' in the
clause list). A third problem would be that this error message is not specific
to OpenACC.
The c++ FE also has a similar problem.
>From gcc-bugs-return-522394-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 15 20:43:39 2016
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Subject: [Bug rtl-optimization/70484] [4.9 Regression] Wrong optimization with aliasing and access via char
Date: Fri, 15 Apr 2016 20:43:00 -0000
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--- Comment #7 from Alexander Cherepanov <ch3root at openwall dot com> ---
On 04/04/2016 12:37 PM, rguenth at gcc dot gnu.org wrote:
> Fixed on trunk sofar.
Thanks. I've checked some variations of the original testcase --
everything works fine now.
>From gcc-bugs-return-522396-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 15 20:46:58 2016
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Subject: [Bug target/70682] [7 Regression] -fcompare-debug building LLVM with checking=release compiler on ppc64le
Date: Fri, 15 Apr 2016 20:46:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Last reconfirmed| |2016-04-15
CC| |jakub at gcc dot gnu.org
Resolution|FIXED |---
Target Milestone|--- |7.0
Summary|[6/7 Regression] |[7 Regression]
|-fcompare-debug building |-fcompare-debug building
|LLVM with checking=release |LLVM with checking=release
|compiler on ppc64le |compiler on ppc64le
Ever confirmed|0 |1
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
But we want to revert that change in GCC 7.
What happens is that the SRA fancy name (plus concatenated SSA version, which
already would require small tweak to the fancy name pretty printer for
TDF_NOUID) is passed to:
#0 vect_get_new_vect_var (type=0x7fffd931bb28, var_kind=vect_simple_var,
name=0x9decc50 "begin_iterator$D850593$I_667")
at ../../gcc/tree-vect-data-refs.c:3951
and that function instead of keeping that name in that form and making sure to
make the var DECL_NAMELESS too and use weirdo chars to concatenate (like $)
ends up calling clean_symbol_name which throws away (needlessly, these symbols
shouldn't ever make it into debug info) the '$' chars etc.
>From gcc-bugs-return-522395-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 15 20:46:38 2016
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Subject: [Bug c/69960] "initializer element is not constant"
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--- Comment #13 from Bernd Schmidt <bernds at gcc dot gnu.org> ---
I actually tried this a few weeks ago, it's slightly less trivial than it seems
since you don't want to fold away the inside of &("fish"[0]).
>From gcc-bugs-return-522397-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 15 21:00:41 2016
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Subject: [Bug ipa/70646] [4.9/5/6/7 Regression] Corrupt truncated function
Date: Fri, 15 Apr 2016 21:00:00 -0000
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--- Comment #24 from Josh Poimboeuf <jpoimboe at redhat dot com> ---
(In reply to Martin Jambor from comment #23)
> (In reply to Josh Poimboeuf from comment #20)
> > Thanks very much to everyone who has looked into this so far. It would be
> > very helpful to get answers to the following questions, so we can understand
> > the impact to the kernel:
> >
> > 1) Is there a reliable way to avoid the bug, either in code or with a gcc
> > flag?
>
> If you mean in general, then unfortunately no, except for disabling
> inlining altogether and removing all always_inline's. In addition to
> the main bug, I found out that I check --param ipa-max-agg-items only
> after incrementing it, so even setting that to zero does not help.
> I'll prepare a patch for that too.
Yes, I'm looking for a general way to either prevent or try to detect potential
other cases of the bug throughout the entire kernel.
Can it only occur with the use of __builtin_constant_p(exp) by an inline
function (where exp is a constant)?
>From gcc-bugs-return-522398-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 15 21:13:39 2016
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Subject: [Bug libfortran/70684] [Regression 5.3, 6] incorrect reading of values from file on Windows
Date: Fri, 15 Apr 2016 21:13:00 -0000
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Jerry DeLisle <jvdelisle at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-15
Assignee|unassigned at gcc dot gnu.org |jvdelisle at gcc dot gnu.org
Summary|incorrect reading of values |[Regression 5.3, 6]
|from file on Windows |incorrect reading of values
| |from file on Windows
Ever confirmed|0 |1
--- Comment #2 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Confirmed, works on 4.9 Fails on 5.3
Marking as a regression.
>From gcc-bugs-return-522399-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 15 21:33:30 2016
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Subject: [Bug ipa/70646] [4.9/5/6/7 Regression] Corrupt truncated function
Date: Fri, 15 Apr 2016 21:33:00 -0000
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--- Comment #25 from Martin Jambor <jamborm at gcc dot gnu.org> ---
(In reply to Martin Jambor from comment #22)
> I suppose the easiest fix is to overload the value field to store the
> size of the access for these two codes and then add the missing check.
OK, so the IS_NOT_CONSTANT case is relatively easy, the following
(untested) patch fixes this PR:
diff --git a/gcc/ipa-inline-analysis.c b/gcc/ipa-inline-analysis.c
index f8ca825..6901cfb 100644
--- a/gcc/ipa-inline-analysis.c
+++ b/gcc/ipa-inline-analysis.c
@@ -867,8 +867,14 @@ evaluate_conditions_for_known_args (struct cgraph_node
*node,
clause |= 1 << (i + predicate_first_dynamic_condition);
continue;
}
- if (c->code == IS_NOT_CONSTANT || c->code == CHANGED)
+ if (c->code == CHANGED)
continue;
+ if (c->code == IS_NOT_CONSTANT)
+ {
+ if (!operand_equal_p (c->val, TYPE_SIZE (TREE_TYPE (val)), 0))
+ clause |= 1 << (i + predicate_first_dynamic_condition);
+ continue;
+ }
if (operand_equal_p (TYPE_SIZE (TREE_TYPE (c->val)),
TYPE_SIZE (TREE_TYPE (val)), 0))
@@ -1807,8 +1813,9 @@ set_cond_stmt_execution_predicate (struct
ipa_func_body_info *fbi,
return;
FOR_EACH_EDGE (e, ei, bb->succs) if (e->flags & EDGE_FALSE_VALUE)
{
+ tree opsize = unshare_expr_without_location (TYPE_SIZE (TREE_TYPE
(op2)));
struct predicate p = add_condition (summary, index, &aggpos,
- IS_NOT_CONSTANT, NULL_TREE);
+ IS_NOT_CONSTANT, opsize);
e->aux = edge_predicate_pool.allocate ();
*(struct predicate *) e->aux = p;
}
On the other hand, the CHANGED part is more difficult because an
unchanged value is represented with an error_mark_node which of course
does not encode the size of the unchanged value. So if we wanted to
handle it, we'd need to encode it differently. However, I am not
convinced it is necessary because, unless I'm forgetting about
something, it is only used as inlining heuristics and can never lead
to any optimizations and thus neither to miscompilations. Am I right?
In any event, I'd like to talk to Honza bout this before going any
further.
>From gcc-bugs-return-522400-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 15 21:52:25 2016
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Subject: [Bug c++/70552] __builtin_constant_p fails to reflect the constness of constexpr calls
Date: Fri, 15 Apr 2016 21:52:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-15
Ever confirmed|0 |1
--- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
I'm going to confirm this report on the basis of others similar to it, such as
bug 19449 which has some interesting background. The patch referenced from it
sets a precedent for the intrinsic treating constant expressions as constant
despite its late evaluation under "normal" circumstances (the
force_folding_builtin_constant_p global variable was put in place to circumvent
this delayed evaluation). cxx_eval_builtin_function_call() in cp/constexpr.c
does set force_folding_builtin_constant_p to true, making it clear that the
intent is for the intrinsic to be evaluated during constexpr evaluation in C++.
Something seems to be interfering with it (I just haven't yet figured out
what).
>From gcc-bugs-return-522401-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 15 21:57:16 2016
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Subject: [Bug sanitizer/70624] [6/7 Regression] Several hundred asan failures with 6.0 on x86_64-apple-darwin10.8
Date: Fri, 15 Apr 2016 21:57:00 -0000
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--- Comment #8 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
This is fixed on x86_64-apple-darwin10 without regression on
x86_64-apple-darwin15 by the following patch
--- ../_clean/libsanitizer/asan/asan_mac.cc 2015-11-23 10:17:05.000000000
+0100
+++ libsanitizer/asan/asan_mac.cc 2016-04-15 13:22:01.000000000 +0200
@@ -97,10 +97,14 @@ void DisableReexec() {
reexec_disabled = true;
}
-extern "C" double dyldVersionNumber;
+extern "C" SANITIZER_WEAK_ATTRIBUTE double dyldVersionNumber;
static const double kMinDyldVersionWithAutoInterposition = 360.0;
bool DyldNeedsEnvVariable() {
+ // Although sanitizer support was added to LLVM on Darwin 10.7+, GCC users
+ // still may want use them on older systems. On older Darwin platforms, dyld
+ // doesn't export dyldVersionNumber symbol and we simply can return true.
+ if (!&dyldVersionNumber) return true;
// If running on OS X 10.11+ or iOS 9.0+, dyld will interpose even if
// DYLD_INSERT_LIBRARIES is not set. However, checking OS version via
// GetMacosVersion() doesn't work for the simulator. Let's instead check
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Subject: [Bug ipa/70646] [4.9/5/6/7 Regression] Corrupt truncated function
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--- Comment #26 from Martin Jambor <jamborm at gcc dot gnu.org> ---
(In reply to Josh Poimboeuf from comment #24)
>
> Yes, I'm looking for a general way to either prevent or try to detect
> potential other cases of the bug throughout the entire kernel.
>
> Can it only occur with the use of __builtin_constant_p(exp) by an inline
> function (where exp is a constant)?
Yes and no. Yes, the problematic inlining analysis predicate
condition type IS_NOT_CONSTANT is only created for conditions
containing a call to __builtin_constant_p. But no, a function does
not have to be explicitly marked inline to be an inline candidate.
This bug can occur when an inlineable function containing a call to
__builtin_constant_p, which checks a parameter or a value it
references and a (possibly indirect) caller of the function actually
passes a constant, but stores it using a type of a different size.
In your testcase, the array initialization is a series of byte stores
but the "load" in __swab64p is 64-bit. Note that gcc cannot detect
that the parameter in your testcase was actually a compile-time
constant. IPA level does by mistake and removes the slow path which
is later selected for real (this can be improved if deemed worthwhile
but IPA analysis still needs to check the size to be correct).
>From gcc-bugs-return-522403-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 15 22:27:16 2016
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Subject: [Bug libfortran/70684] [Regression 5.3, 6] incorrect reading of values from file on Windows
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--- Comment #3 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
This slightly modified version of the testcase shows the bug with Linux:
program test
implicit none
integer,parameter :: isize=12
integer,parameter :: funit=12
integer :: i
character(1), parameter :: cr=char(13)
double precision, dimension(isize) :: a
do i=1,isize
a(i)=dble(i)
enddo
write(6,*)'Value to write'
do i=1,isize
write(6,*)a(i)
enddo
open(funit,file='test.txt')
write(funit,'(1x,6(f25.20,'',''),a)') (a(i),i=1,6), cr
write(funit,'(1x,6(f25.20,'',''),a)') (a(i),i=7,12), cr
close(funit)
do i=1,isize
a(i)=0d0
enddo
open(funit,file='test.txt')
read(funit,*) (a(i),i=1,isize)
close(funit)
write(6,*)'Values after read'
do i=1,isize
write(6,*)a(i)
enddo
end
>From gcc-bugs-return-522404-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 16 00:30:54 2016
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Subject: [Bug c++/70616] [4.9/5/6/7 Regression] ICE on valid code on x86_64-linux-gnu in build_base_path, at cp/class.c:303
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Patrick Palka <ppalka at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ppalka at gcc dot gnu.org
--- Comment #2 from Patrick Palka <ppalka at gcc dot gnu.org> ---
Is this a valid test case?
>From gcc-bugs-return-522405-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 16 00:41:49 2016
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Subject: [Bug c/29280] misleading warning for assignment used as truth construct
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed|2010-02-21 00:38:52 |2016-4-15
CC| |msebor at gcc dot gnu.org
Known to fail| |4.0.0, 4.5.3, 4.8.3, 4.9.3,
| |5.3.0, 6.0
--- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
It seems like it should be trivial to enhance the warning by adding a note with
the suggestion(s) mentioned in the request.
For reference, the following is what Clang prints:
$ cat t.c && clang -S -Wparentheses t.c
int f (int a, int b)
{
if (a = b)
return 1;
return 2;
}
t.c:3:11: warning: using the result of an assignment as a condition without
parentheses [-Wparentheses]
if (a = b)
~~^~~
t.c:3:11: note: place parentheses around the assignment to silence this warning
if (a = b)
^
( )
t.c:3:11: note: use '==' to turn this assignment into an equality comparison
if (a = b)
^
==
1 warning generated.
>From gcc-bugs-return-522406-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 16 00:44:03 2016
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From: "luo_12yan at 163 dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug go/67180] Gccgo does not support MIPS
Date: Sat, 16 Apr 2016 00:44:00 -0000
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czlz <luo_12yan at 163 dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |luo_12yan at 163 dot com
--- Comment #5 from czlz <luo_12yan at 163 dot com> ---
(In reply to tsuibin from comment #1)
> I added MIPS support to gccgo.
> But I don't know how to submit a patch to gccgo
>
> My code is here :
> https://github.com/tsuibin/libgo_mips_elf_support/blob/master/
> libgo_mips_elf_support.patch
>
> and here:
> https://github.com/tsuibin/libffi_mips_go_closure/blob/master/
> libffi_mips_go_closure.patch
You rule!
I've compiled MIPS processor GCCGO not passed.
But, do you have a new version of the patch it?
>From gcc-bugs-return-522407-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 16 00:51:08 2016
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Subject: [Bug c++/70616] [4.9/5/6/7 Regression] ICE on valid code on x86_64-linux-gnu in build_base_path, at cp/class.c:303
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--- Comment #3 from Patrick Palka <ppalka at gcc dot gnu.org> ---
The following test case where test is not a function template does not ICE but
it aborts at runtime because a == 2 at the end of execution:
static int a;
struct A
{
virtual ~A () { a++; }
};
struct B : public A
{
virtual ~B () { a++; }
};
void test ()
{
B *b = new B;
b->~A ();
}
int main ()
{
test ();
if (a != 1)
__builtin_abort ();
}
Changing b->~A () to b->A::~A () makes the program not abort.
>From gcc-bugs-return-522408-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 16 00:51:09 2016
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Subject: [Bug c/38295] Support pointer difference as constant in static initializer
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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|--- |WONTFIX
--- Comment #9 from Martin Sebor <msebor at gcc dot gnu.org> ---
I'm going to out on a limb and close this as WONTFIX. First, I don't believe
this will or can be implemented for the reasons Andrew mentioned. The linker
also can and some linkers do reorder functions and so the notion of a
difference between them doesn't really make sense, either at runtime, but
certainly not at compile time. Second, there has been no activity on this
request in the last 8 years.
>From gcc-bugs-return-522409-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 16 05:21:30 2016
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From: "su at cs dot ucdavis.edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70689] New: ICE on valid code at -O1 in 32-bit mode on x86_64-linux-gnu in curr_insn_transform, at lra-constraints.c:3564
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Bug ID: 70689
Summary: ICE on valid code at -O1 in 32-bit mode on
x86_64-linux-gnu in curr_insn_transform, at
lra-constraints.c:3564
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: su at cs dot ucdavis.edu
Target Milestone: ---
The following code causes an ICE when compiled with the current gcc trunk at
-O1 on x86_64-linux-gnu in the 32-bit mode (but not in 64-bit mode).
It is a regression from 5.3.x.
$ gcc-trunk -v
Using built-in specs.
COLLECT_GCC=gcc-trunk
COLLECT_LTO_WRAPPER=/usr/local/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/6.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto
--prefix=/usr/local/gcc-trunk --disable-bootstrap
Thread model: posix
gcc version 6.0.0 20160415 (experimental) [trunk revision 235013] (GCC)
$
$ gcc-trunk -m32 -O0 small.c
$ gcc-5.3 -m32 -O1 small.c
$
$ gcc-trunk -m32 -O1 small.c
small.c: In function ‘main’:
small.c:23:1: error: unable to generate reloads for:
}
^
(insn 22 50 23 4 (set (reg:DF 93 [ a_lsm.7 ])
(float:DF (plus:SI (reg/f:SI 20 frame)
(const_int -20 [0xffffffffffffffec])))) small.c:14 205
{*floatsidf2_i387}
(nil))
small.c:23:1: internal compiler error: in curr_insn_transform, at
lra-constraints.c:3564
0xb05bf8 _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
../../gcc-source-trunk/gcc/rtl-error.c:108
0xa05822 curr_insn_transform
../../gcc-source-trunk/gcc/lra-constraints.c:3564
0xa07726 lra_constraints(bool)
../../gcc-source-trunk/gcc/lra-constraints.c:4506
0x9f3544 lra(_IO_FILE*)
../../gcc-source-trunk/gcc/lra.c:2290
0x9aa599 do_reload
../../gcc-source-trunk/gcc/ira.c:5425
0x9aa599 execute
../../gcc-source-trunk/gcc/ira.c:5609
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
$
-------------------------------------
struct S
{
int f;
};
double a;
int c;
static
void fn1 (struct S *p1)
{
for (; c; )
if (p1->f++)
a = (int) p1;
}
int
main ()
{
struct S b = { 0 };
fn1 (&b);
return 0;
}
>From gcc-bugs-return-522410-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 16 05:26:22 2016
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From: "ajmay81 at googlemail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libfortran/70684] [Regression 5.3, 6] incorrect reading of values from file on Windows
Date: Sat, 16 Apr 2016 05:26:00 -0000
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--- Comment #4 from Andy May <ajmay81 at googlemail dot com> ---
Yes, I agree that demonstrates the bug - and I see it gives the desired output
with 4.8.3 but not with 5.3.0.
However, I would actually not mind if that modified testcase continued not to
'work' on Linux since this is equivalent to writing the file on Windows and
reading on Linux, which although it's nice that it once did work, it's arguable
it should not have (although if it doesn't breach the Fortran standard I guess
there is no problem to have it).
I think the only case that definitely should work, which currently does not on
Windows, is writing and reading on the same system. In other cases one should
be expected to run dos2unix/unix2dos on the file so that it's in the correct
state before being read.
>From gcc-bugs-return-522411-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 16 05:46:33 2016
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Subject: [Bug ipa/70646] [4.9/5/6/7 Regression] Corrupt truncated function
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70646
--- Comment #27 from rguenther at suse dot de <rguenther at suse dot de> ---
On April 15, 2016 11:58:39 PM GMT+02:00, "jamborm at gcc dot gnu.org"
<gcc-bugzilla@gcc.gnu.org> wrote:
>https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70646
>
>--- Comment #26 from Martin Jambor <jamborm at gcc dot gnu.org> ---
>(In reply to Josh Poimboeuf from comment #24)
>>
>> Yes, I'm looking for a general way to either prevent or try to detect
>> potential other cases of the bug throughout the entire kernel.
>>
>> Can it only occur with the use of __builtin_constant_p(exp) by an
>inline
>> function (where exp is a constant)?
>
>Yes and no. Yes, the problematic inlining analysis predicate
>condition type IS_NOT_CONSTANT is only created for conditions
>containing a call to __builtin_constant_p. But no, a function does
>not have to be explicitly marked inline to be an inline candidate.
>
>This bug can occur when an inlineable function containing a call to
>__builtin_constant_p, which checks a parameter or a value it
>references and a (possibly indirect) caller of the function actually
>passes a constant, but stores it using a type of a different size.
>
>In your testcase, the array initialization is a series of byte stores
>but the "load" in __swab64p is 64-bit. Note that gcc cannot detect
>that the parameter in your testcase was actually a compile-time
>constant. IPA level does by mistake and removes the slow path which
>is later selected for real (this can be improved if deemed worthwhile
>but IPA analysis still needs to check the size to be correct).
I was arguing that if IPA proves a condition to true/false then it should
adjust it that way in modification phase.
This would have prevented the bug as well (eventually using the 'wrong' path).
At least it would have avoided hitting a unreachable path at runtime which can
be very tricky to debug.
>From gcc-bugs-return-522412-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 16 07:19:42 2016
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Subject: [Bug c++/70685] [6/7 Regression] ICE: Segmentation fault
Date: Sat, 16 Apr 2016 07:19:00 -0000
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Fixed. Thanks.
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Subject: [Bug ipa/70646] [4.9/5/6/7 Regression] Corrupt truncated function
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--- Comment #28 from Martin Jambor <jamborm at gcc dot gnu.org> ---
(In reply to rguenther@suse.de from comment #27)
> I was arguing that if IPA proves a condition to true/false then it
> should adjust it that way in modification phase.
The thing is that it does not prove it correctly. If we modify the
testcase so that only the byte at offset zero is constant and others
are not, inlining would still think the whole eight-byte access is to
a known constant.
Redirecting to some builtin_true or builtin_false would have made
debugging easier, I agree.
>From gcc-bugs-return-522414-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 16 09:35:15 2016
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Subject: [Bug c/41138] Inconsistent (incorrect?) "overflow in implicit constant conversion" warning
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Vincent Lefèvre <vincent-gcc at vinc17 dot net> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |vincent-gcc at vinc17 dot net
--- Comment #5 from Vincent Lefèvre <vincent-gcc at vinc17 dot net> ---
(In reply to Martin Sebor from comment #2)
> So all cases are equivalent to
>
> foo = foo & 65280;
>
> The result of the expression (foo & 65280) is an int (or unsigned int, long,
> unsigned long, depending on the suffix of the constant) which is converted
> to char (the type of the assignment expression). In all cases in the first
> test case, the value of the result is guaranteed to be representable in
> unsigned char. There is no overflow or slicing and the code is strictly
> conforming with safe semantics.
I don't think that the code is strictly conforming: if foo == 0, the result is
implementation-defined because a signed 0 may have two possible representations
if the integer representation is not two's complement. However, I doubt that
the warning is related to that, because this is not related to overflow.
> That said, a warning stating that foo &= 65280 always evaluates to zero
> might be useful in case the intent wasn't to clear the variable (otherwise
> the code could be rewritten as foo = 0).
There shouldn't be a warning by default for the case the result is always 0:
the value 65280 could come from a macro whose value depends on the build
context. This is the same thing with always true or always false comparisons
(one used to get a warning in the past, but this has been fixed, AFAIK).
>From gcc-bugs-return-522415-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 16 09:56:46 2016
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Subject: [Bug target/59666] IBM long double arithmetic results invalid in non-default rounding modes
Date: Sat, 16 Apr 2016 09:56:00 -0000
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--- Comment #7 from Vincent Lefèvre <vincent-gcc at vinc17 dot net> ---
(In reply to joseph@codesourcery.com from comment #6)
> There are no such requirements in ISO C for non-IEEE types;
The standard says nowhere that the rounding directions that are provided by the
implementation apply only to IEEE types. It even explicitly says that there may
be additional implementation-defined rounding directions, thus not related to
IEEE at all!
>From gcc-bugs-return-522416-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 16 11:59:18 2016
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From: "trippels at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70690] New: [6/7 Regression] r235002 miscompiles tcmalloc
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Bug ID: 70690
Summary: [6/7 Regression] r235002 miscompiles tcmalloc
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: trippels at gcc dot gnu.org
CC: jason at gcc dot gnu.org
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Created attachment 38286
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38286&action=edit
unreduced testcase
Starting with r235002 tcmalloc apparently gets miscompiled.
Chromium uses tcmalloc and crashes on startup:
Program received signal SIGSEGV, Segmentation fault.
0x00005555564f7dbf in tcmalloc::CentralFreeList::FetchFromSpans() ()
(gdb) bt
#0 0x00005555564f7dbf in tcmalloc::CentralFreeList::FetchFromSpans() ()
#1 0x00005555564f8429 in tcmalloc::CentralFreeList::FetchFromSpansSafe() ()
#2 0x00005555564f84c2 in tcmalloc::CentralFreeList::RemoveRange(void**,
void**, int) ()
#3 0x00005555564f3b94 in tcmalloc::ThreadCache::FetchFromCentralCache(unsigned
long, unsigned long) ()
#4 0x000055555b24873a in tc_malloc ()
#5 0x000055555650a2ba in malloc ()
#6 0x00007ffff606b07d in __fopen_internal (filename=0x8a049a4f740
"/proc/31709/stat", mode=0x55555b252e53 "rb", is32=1) at iofopen.c:69
#7 0x00005555564849c6 in base::OpenFile(base::FilePath const&, char const*) ()
#8 0x0000555556483787 in base::ReadFileToStringWithMaxSize(base::FilePath
const&, std::__cxx11::basic_string<char, std::char_traits<char>,
std::allocator<char> >*, unsigned long) ()
#9 0x00005555564dae45 in base::internal::ReadProcStats(int,
std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>
>*) ()
#10 0x00005555564dbb03 in base::internal::ReadProcStatsAndGetFieldAsInt64(int,
base::internal::ProcStatsFields) ()
#11 0x00005555564a2a72 in base::CurrentProcessInfo::CreationTime() ()
#12 0x000055555602a970 in ChromeMainDelegate::ChromeMainDelegate() ()
#13 0x00005555560299db in ChromeMain ()
I've narrowed the issue down to a single file (attached).
Assembly difference using:
g++ -c -fPIC static_vars.ii -O2 -S
markus@x4 Release % diff -u static_vars.s static_vars_bad.s
--- static_vars.s 2016-04-16 13:52:18.332989892 +0200
+++ static_vars_bad.s 2016-04-16 13:34:21.899894073 +0200
@@ -1118,6 +1118,31 @@
.cfi_endproc
.LFE1443:
.size _ZN8tcmalloc6Static14InitStaticVarsEv,
.-_ZN8tcmalloc6Static14InitStaticVarsEv
+ .section .text.startup,"ax",@progbits
+ .p2align 4,,15
+ .type _GLOBAL__sub_I_static_vars.cc, @function
+_GLOBAL__sub_I_static_vars.cc:
+.LFB1718:
+ .cfi_startproc
+ movq _ZN8tcmalloc6Static14central_cache_E@GOTPCREL(%rip), %rdx
+ xorl %eax, %eax
+ leaq 64448(%rdx), %rsi
+ .p2align 4,,10
+ .p2align 3
+.L68:
+ movq %rdx, %rdi
+ addq $1216, %rdx
+ movl $152, %ecx
+ cmpq %rdx, %rsi
+ rep stosq
+ jne .L68
+ rep ret
+ .cfi_endproc
+.LFE1718:
+ .size _GLOBAL__sub_I_static_vars.cc, .-_GLOBAL__sub_I_static_vars.cc
+ .section .init_array,"aw"
+ .align 8
+ .quad _GLOBAL__sub_I_static_vars.cc
.globl _ZN8tcmalloc6Static9pageheap_E
.bss
.align 8
@@ -1173,5 +1198,5 @@
.size _ZN8tcmalloc6Static14pageheap_lock_E, 4
_ZN8tcmalloc6Static14pageheap_lock_E:
.zero 4
- .ident "GCC: (GNU) 6.0.0 20160415 (experimental)"
+ .ident "GCC: (GNU) 6.0.1 20160416 (prerelease)"
.section .note.GNU-stack,"",@progbits
It is weekend, so I haven't looked deeper yet.
>From gcc-bugs-return-522417-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 16 12:44:18 2016
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libfortran/70684] [4.9/5/6/7 Regression] incorrect reading of values from file on Windows
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Known to work| |4.8.5
Summary|[Regression 5.3, 6] |[4.9/5/6/7 Regression]
|incorrect reading of values |incorrect reading of values
|from file on Windows |from file on Windows
Known to fail| |4.9.0, 5.3.0, 6.0
--- Comment #5 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
"Works" with gcc version 4.8.0 20130308 (experimental) [trunk revision 196540]
fail with gcc version 4.9.0 20130316 (experimental) [trunk revision 196701].
>From gcc-bugs-return-522418-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 16 13:00:33 2016
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Subject: [Bug c++/70691] New: internal compiler error: Segmentation fault with lambda
Date: Sat, 16 Apr 2016 13:00:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70691
Bug ID: 70691
Summary: internal compiler error: Segmentation fault with
lambda
Product: gcc
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gcc -std=c++14 repro.cc
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Subject: [Bug c++/70691] internal compiler error: Segmentation fault with lambda
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--- Comment #1 from cornelius.mika at gmail dot com ---
Created attachment 38287
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38287&action=edit
repro
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Subject: [Bug libstdc++/60936] [4.9/5/6/7 Regression] Binary code bloat with std::string
Date: Sat, 16 Apr 2016 13:02:00 -0000
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--- Comment #16 from Jonathan Wakely <redi at gcc dot gnu.org> ---
For the record, I tried this and didn't see any change in code size, so didn't
commit anything.
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From: "cornelius.mika at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70691] internal compiler error: Segmentation fault with lambda
Date: Sat, 16 Apr 2016 13:02:00 -0000
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--- Comment #2 from cornelius.mika at gmail dot com ---
Comment on attachment 38287
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38287
repro
>template <typename F>
>void demoError(int x, F f)
>{
> const int y = x;
>
> auto lambda = [=](auto g) {
> for (int i = 0; i < y; ++i) {
> g();
> }
> return 0;
> };
>
> for (int i = 0; i < 1; ++i) {
> lambda(f);
> }
>}
>
>int main(int argc, char **argv)
>{
> (void)argc;
> (void)argv;
>
> demoError(1, [] { });
>
> return 0;
>}
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Subject: [Bug c++/70691] internal compiler error: Segmentation fault with lambda
Date: Sat, 16 Apr 2016 13:07:00 -0000
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--- Comment #3 from cornelius.mika at gmail dot com ---
This bug is fixed in GCC 6.
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/64329] Crash when returning reference from lambda with deduced type
Date: Sat, 16 Apr 2016 13:18:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-16
Ever confirmed|0 |1
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Confirming the original report, which is a real bug.
N.B. for the different issue in comment 1, G++ will warn but only with
-Wsystem-headers, because the problem is inside the <functional> header:
/home/jwakely/gcc/6/include/c++/6.0.0/functional:1726:40: warning: returning
reference to temporary [-Wreturn-local-addr]
std::forward<_ArgTypes>(__args)...);
^
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/70692] New: No warning when std::function<const int&(...)> binds a reference to a temporary
Date: Sat, 16 Apr 2016 13:29:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70692
Bug ID: 70692
Summary: No warning when std::function<const int&(...)> binds a
reference to a temporary
Product: gcc
Version: 6.0
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This has undefined behaviour:
#include <functional>
int f() { return 0; }
int main()
{
std::function<const int&()> ff = f;
return ff();
}
but the -Wreturn-local-addr warning that is enabled by default is suppressed in
system headers.
In file included from fun.cc:1:0:
/home/jwakely/gcc/6/include/c++/6.0.0/functional: In instantiation of ‘static
_Res std::_Function_handler<_Res(_ArgTypes ...), _Functor>::_M_invoke(const
std::_Any_data&, _ArgTypes&& ...) [with _Res = const int&; _Functor = int
(*)(); _ArgTypes = {}]’:
/home/jwakely/gcc/6/include/c++/6.0.0/functional:2124:19: required from
‘std::function<_Res(_ArgTypes ...)>::function(_Functor) [with _Functor = int
(*)(); <template-parameter-2-2> = void; <template-parameter-2-3> = void; _Res =
const int&; _ArgTypes = {}]’
fun.cc:7:36: required from here
/home/jwakely/gcc/6/include/c++/6.0.0/functional:1726:40: warning: returning
reference to temporary [-Wreturn-local-addr]
std::forward<_ArgTypes>(__args)...);
^
We should either ensure the warning is enabled, even in system headers (similar
to PR 58876) or add a run-time check to _Function_handler<_Res(_ArgTypes...),
_Functor>::_M_invoke (it can't be a compile-time static assertion because that
function is instantiated even if it's never called, and the code is only
undefined if it's invoked).
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/64329] Crash when returning reference from lambda with deduced type
Date: Sat, 16 Apr 2016 13:30:00 -0000
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--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #2)
> (In reply to Michael Stahl from comment #1)
> > i believe i've hit the same problem
>
> I don't think so. The original bug report is for 4.9.3, and seems to be an
> actual compiler bug that is fixed already in GCC 5 and later.
>
> Your case is invalid code. While I agree a warning would be nice, it's not
> the same as a bug in 4.9.3 that has been fixed.
I've created PR 70692 for the missing warning on the invalid code, since it's a
different problem to the one in this PR.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/53833] m68k-uclinux xgcc ICE when compiling libgcc (linux-atomic.c:203:1: in emit_library_call_value_1, at calls.c:4146)
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angelo <angelo70 at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |angelo70 at gmail dot com
--- Comment #5 from angelo <angelo70 at gmail dot com> ---
There are 5 comments with related job to collect logs and help gcc community,
and other as me facing similar issues compiling with "--with-arch=cf".
I know gcc is an open community and we can't pretend anything,
anyway, at least a reply in 4 years would be good.
>From gcc-bugs-return-522427-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 16 13:55:41 2016
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Subject: [Bug libstdc++/70692] No warning when std::function<const int&(...)> binds a reference to a temporary
Date: Sat, 16 Apr 2016 13:55:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70692
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2016-04-16
Assignee|unassigned at gcc dot gnu.org |redi at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Created attachment 38288
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38288&action=edit
Untested patch.
We can enable -Wsystem-headers around the relevant function, but we also need a
change to <ext/string_conversions.h> to suppress the false positive
-Wsign-compare warnings in there.
>From gcc-bugs-return-522428-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 16 14:08:43 2016
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Subject: [Bug libstdc++/70692] No warning when std::function<const int&(...)> binds a reference to a temporary
Date: Sat, 16 Apr 2016 14:08:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70692
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Bah, it seems that -Wsystem-headers doesn't get turned off again by the
#pragma GCC diagnostic pop
>From gcc-bugs-return-522429-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 16 14:25:50 2016
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From: "steven.shi at intel dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/50818] va_list is filled incorrectly in functions with ms_abi attribute on amd64
Date: Sat, 16 Apr 2016 14:25:00 -0000
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Steven Shi <steven.shi at intel dot com> changed:
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----------------------------------------------------------------------------
CC| |steven.shi at intel dot com
--- Comment #5 from Steven Shi <steven.shi at intel dot com> ---
Hi Bizjak,
Your Executable testcase cannot really work with -mabi=ms on the command line.
If add a printf() in the while loop to output the sum value as below example,
the testcase will fail again with Segmentation fault even building with with
-mabi=ms.
$ gcc -O2 -mabi=ms pr50818.c
$ ./a.out
Segmentation fault (core dumped)
#include <stdio.h>
int
__attribute__((ms_abi))
foo (int n, ...)
{
__builtin_va_list ap;
int sum = 0;
__builtin_va_start (ap, n);
while (n--) {
sum += __builtin_va_arg (ap, int);
printf("sum = %d\n", sum);
}
__builtin_va_end (ap);
return sum;
}
int main ()
{
int res = foo (10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
if (res != 55)
__builtin_abort ();
return 0;
}
>From gcc-bugs-return-522430-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 16 14:41:06 2016
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Subject: [Bug target/50818] va_list is filled incorrectly in functions with ms_abi attribute on amd64
Date: Sat, 16 Apr 2016 14:41:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=50818
--- Comment #6 from Steven Shi <steven.shi at intel dot com> ---
BTW, latest LLVM/Clang 3.8 release has fixed this va_list ms_abi issue, please
see below email thread. Does GCC really cannot fix it as LLVM/Clang? This issue
really impact Uefi firmware building with GCC.
http://lists.llvm.org/pipermail/llvm-dev/2016-January/093778.html
>From gcc-bugs-return-522431-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 16 14:53:28 2016
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/64883] FAIL: 17_intro/headers/c++*/all_attributes.cc (test for excess errors) on x86_64-apple-darwin10
Date: Sat, 16 Apr 2016 14:53:00 -0000
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--- Comment #37 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Still present at revision r235031 with more failures, see
https://gcc.gnu.org/ml/gcc-testresults/2016-04/msg01541.html.
>From gcc-bugs-return-522432-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 16 14:57:45 2016
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From: "dcb314 at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70693] New: valgrind error in get_visual_column
Date: Sat, 16 Apr 2016 14:57:00 -0000
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Bug ID: 70693
Summary: valgrind error in get_visual_column
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: dcb314 at hotmail dot com
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Created attachment 38289
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38289&action=edit
C++ source code
The attached C++ code, when compiled by gcc trunk dated 20160412, does this:
==12372== Invalid read of size 1
==12372== at 0x73E3EF: get_visual_column(expanded_location, unsigned int,
unsigned int*, unsigned int*) [clone .isra.1] (c-indentation.c:81)
==12372== by 0x73E5A5: should_warn_for_misleading_indentation
(c-indentation.c:397)
==12372== by 0x73E5A5: warn_for_misleading_indentation(token_indent_info
const&, token_indent_info const&, token_indent_info const&)
(c-indentation.c:601)
==12372== by 0x6797B3: cp_parser_implicitly_scoped_statement(cp_parser*,
bool*, token_indent_info const&, vec<tree_node*, va_heap, vl_ptr>*)
(parser.c:11928)
$ ~/gcc/results/bin/gcc -v
Using built-in specs.
COLLECT_GCC=/home/dcb/gcc/results/bin/gcc
COLLECT_LTO_WRAPPER=/home/dcb/gcc/results/libexec/gcc/x86_64-pc-linux-gnu/6.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../src/trunk/configure --prefix=/home/dcb/gcc/results
--disable-bootstrap --disable-multilib --disable-werror
--enable-checking=valgrind --enable-languages=c,c++,fortran
Thread model: posix
gcc version 6.0.0 20160412 (experimental) (GCC)
$
Command line for the compiler is
$ ~/gcc/results/bin/gcc -c -Wmisleading-indentation bug277.cc
>From gcc-bugs-return-522433-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 16 15:25:33 2016
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Subject: [Bug middle-end/70689] ICE on valid code at -O1 in 32-bit mode on x86_64-linux-gnu in curr_insn_transform, at lra-constraints.c:3564
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-16
CC| |david.sherwood at arm dot com
Component|c++ |middle-end
Ever confirmed|0 |1
--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
It is caused by r223402.
>From gcc-bugs-return-522434-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 16 15:29:47 2016
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Subject: [Bug libstdc++/64883] FAIL: 17_intro/headers/c++*/all_attributes.cc (test for excess errors) on x86_64-apple-darwin10
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--- Comment #38 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Please create a PR for the experimental/filesystem FAILs, they're almost
certainly all due to a single error.
>From gcc-bugs-return-522435-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 16 16:01:12 2016
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/70694] New: 50 experimental/filesystem/* failures on x86_64-apple-darwin10
Date: Sat, 16 Apr 2016 16:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70694
Bug ID: 70694
Summary: 50 experimental/filesystem/* failures on
x86_64-apple-darwin10
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: dominiq at lps dot ens.fr
CC: iains at gcc dot gnu.org, redi at gcc dot gnu.org
Target Milestone: ---
Host: x86_64-apple-darwin10
Target: x86_64-apple-darwin10
Build: x86_64-apple-darwin10
The following tests
FAIL: experimental/filesystem/iterators/directory_iterator.cc (test for excess
errors)
FAIL: experimental/filesystem/iterators/recursive_directory_iterator.cc (test
for excess errors)
FAIL: experimental/filesystem/operations/absolute.cc (test for excess errors)
FAIL: experimental/filesystem/operations/canonical.cc (test for excess errors)
FAIL: experimental/filesystem/operations/copy.cc (test for excess errors)
FAIL: experimental/filesystem/operations/create_directories.cc (test for excess
errors)
FAIL: experimental/filesystem/operations/current_path.cc (test for excess
errors)
FAIL: experimental/filesystem/operations/exists.cc (test for excess errors)
FAIL: experimental/filesystem/operations/file_size.cc (test for excess errors)
FAIL: experimental/filesystem/operations/status.cc (test for excess errors)
FAIL: experimental/filesystem/operations/temp_directory_path.cc (test for
excess errors)
FAIL: experimental/filesystem/path/append/path.cc (test for excess errors)
FAIL: experimental/filesystem/path/assign/assign.cc (test for excess errors)
FAIL: experimental/filesystem/path/assign/copy.cc (test for excess errors)
FAIL: experimental/filesystem/path/compare/compare.cc (test for excess errors)
FAIL: experimental/filesystem/path/compare/path.cc (test for excess errors)
FAIL: experimental/filesystem/path/compare/strings.cc (test for excess errors)
FAIL: experimental/filesystem/path/concat/path.cc (test for excess errors)
FAIL: experimental/filesystem/path/concat/strings.cc (test for excess errors)
FAIL: experimental/filesystem/path/construct/copy.cc (test for excess errors)
FAIL: experimental/filesystem/path/construct/default.cc (test for excess
errors)
FAIL: experimental/filesystem/path/construct/locale.cc (test for excess errors)
FAIL: experimental/filesystem/path/construct/range.cc (test for excess errors)
FAIL: experimental/filesystem/path/decompose/extension.cc (test for excess
errors)
FAIL: experimental/filesystem/path/decompose/filename.cc (test for excess
errors)
FAIL: experimental/filesystem/path/decompose/parent_path.cc (test for excess
errors)
FAIL: experimental/filesystem/path/decompose/relative_path.cc (test for excess
errors)
FAIL: experimental/filesystem/path/decompose/root_directory.cc (test for excess
errors)
FAIL: experimental/filesystem/path/decompose/root_name.cc (test for excess
errors)
FAIL: experimental/filesystem/path/decompose/root_path.cc (test for excess
errors)
FAIL: experimental/filesystem/path/decompose/stem.cc (test for excess errors)
FAIL: experimental/filesystem/path/generic/generic_string.cc (test for excess
errors)
FAIL: experimental/filesystem/path/itr/traversal.cc (test for excess errors)
FAIL: experimental/filesystem/path/modifiers/clear.cc (test for excess errors)
FAIL: experimental/filesystem/path/modifiers/make_preferred.cc (test for excess
errors)
FAIL: experimental/filesystem/path/modifiers/remove_filename.cc (test for
excess errors)
FAIL: experimental/filesystem/path/modifiers/replace_extension.cc (test for
excess errors)
FAIL: experimental/filesystem/path/modifiers/replace_filename.cc (test for
excess errors)
FAIL: experimental/filesystem/path/modifiers/swap.cc (test for excess errors)
FAIL: experimental/filesystem/path/nonmember/hash_value.cc (test for excess
errors)
FAIL: experimental/filesystem/path/query/empty.cc (test for excess errors)
FAIL: experimental/filesystem/path/query/has_extension.cc (test for excess
errors)
FAIL: experimental/filesystem/path/query/has_filename.cc (test for excess
errors)
FAIL: experimental/filesystem/path/query/has_parent_path.cc (test for excess
errors)
FAIL: experimental/filesystem/path/query/has_relative_path.cc (test for excess
errors)
FAIL: experimental/filesystem/path/query/has_root_directory.cc (test for excess
errors)
FAIL: experimental/filesystem/path/query/has_root_name.cc (test for excess
errors)
FAIL: experimental/filesystem/path/query/has_root_path.cc (test for excess
errors)
FAIL: experimental/filesystem/path/query/has_stem.cc (test for excess errors)
FAIL: experimental/filesystem/path/query/is_relative.cc (test for excess
errors)
fail on x86_64-apple-darwin10 with
ld: warning: std::experimental::filesystem::v1::__cxx11::path::~path() has
different visibility (hidden) in
/opt/gcc/build_c/x86_64-apple-darwin10.8.0/i386/libstdc++-v3/src/filesystem/.libs/libstdc++fs.a(path.o)
and (default) in
/var/folders/LW/LW1oufkMGIqlLpjYn45fBU+++TI/-Tmp-//ccCpCvPF.o^M
>From gcc-bugs-return-522436-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 16 16:03:09 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/70694] 50 experimental/filesystem/* failures on x86_64-apple-darwin10
Date: Sat, 16 Apr 2016 16:03:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70694
Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-16
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
See https://gcc.gnu.org/ml/gcc-testresults/2016-04/msg01013.html and more
recent results.
>From gcc-bugs-return-522437-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 16 16:04:09 2016
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Subject: [Bug libstdc++/64883] FAIL: 17_intro/headers/c++*/all_attributes.cc (test for excess errors) on x86_64-apple-darwin10
Date: Sat, 16 Apr 2016 16:04:00 -0000
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--- Comment #39 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Please create a PR for the experimental/filesystem FAILs, they're almost
> certainly all due to a single error.
PR70694.
>From gcc-bugs-return-522438-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 16 16:04:47 2016
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/70694] 50 experimental/filesystem/* failures on x86_64-apple-darwin10
Date: Sat, 16 Apr 2016 16:04:00 -0000
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Why is it hidden in the archive? This doesn't seem like a libstdc++ bug, given
that the destructor is defined like so:
namespace std _GLIBCXX_VISIBILITY(default)
{
...
~path() = default;
>From gcc-bugs-return-522439-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 16 16:09:48 2016
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From: "functional.yy at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70695] New: [C++14] ICE in a herdly complicated compile-time metaprogramming
Date: Sat, 16 Apr 2016 16:09:00 -0000
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Bug ID: 70695
Summary: [C++14] ICE in a herdly complicated compile-time
metaprogramming
Product: gcc
Version: 5.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Created attachment 38290
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38290&action=edit
preprocessed source file
> g++ -Wall -pedantic -std=c++14 a.cpp
Internal compiler error: Error reporting routines re-entered.
libbacktrace could not find executable to open
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://sourceforge.net/projects/mingw-w64> for instructions.
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Subject: [Bug c++/70018] [4.9/5/6/7 Regression] Possible issue around IPO and C++ comdats discovered as pure/const
Date: Sat, 16 Apr 2016 16:31:00 -0000
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--- Comment #13 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Author: hubicka
Date: Sat Apr 16 16:30:48 2016
New Revision: 235063
URL: https://gcc.gnu.org/viewcvs?rev=235063&root=gcc&view=rev
Log:
PR ipa/70018
* cgraph.c (cgraph_node::get_availability): Add REF parameter.
(cgraph_node::function_symbol): Likewise.
(cgraph_node::function_or_virtual_thunk_symbol): Likewise.
* cgraph.h (symtab_node::get_availabbility): Add REF parameter.
(symtab_node::ultimate_alias_target): Add REF parameter.
(symtab_node::binds_to_current_def_p): Declare.
(symtab_node;:ultimate_alias_target_1): Add REF parameter.
(cgraph_node::function_symbol): Likewise.
(cgraph_node::function_or_virtual_thunk_symbol): Likewise.
(cgraph_node::get_availability): Likewise.
(cgraph_edge::binds_to_current_def_p): New inline function.
(varpool_node::get_availability): Add REF parameter.
(varpool_node::ultimate_alias_target): Likewise.
* symtab.c (symtab_node::ultimate_alias_target_1): Likewise.
(symtab_node::binds_to_current_def_p): Likewise.
* varpool.c (varpool_node::get_availability): Likewise.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/cgraph.c
trunk/gcc/cgraph.h
trunk/gcc/symtab.c
trunk/gcc/varpool.c
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Subject: [Bug libstdc++/68737] FAIL: 22_locale/num_put/put/char/14220.cc execution test
Date: Sat, 16 Apr 2016 16:36:00 -0000
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--- Comment #1 from John David Anglin <danglin at gcc dot gnu.org> ---
14220.cc fails due stack growth:
-bash-4.3$ ./14220.exe
Pid 28500 received a SIGSEGV for stack growth failure.
Possible causes: insufficient memory or swap space,
or stack size exceeded maxssiz.
Segmentation fault
-bash-4.3$ ulimit -s
16384
Increasing requires kernel rebuild...
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Subject: [Bug fortran/57093] Seg fault on internal output to a character scalar coarray
Date: Sat, 16 Apr 2016 17:34:00 -0000
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--- Comment #3 from Damian Rouson <damian at sourceryinstitute dot org> ---
This bug report can be closed now. The submitted code completes without error
with gfortran 5.3 and 6.0.0.
>From gcc-bugs-return-522443-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 16 17:35:26 2016
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Subject: [Bug fortran/57093] Seg fault on internal output to a character scalar coarray
Date: Sat, 16 Apr 2016 17:35:00 -0000
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--- Comment #4 from Damian Rouson <damian at sourceryinstitute dot org> ---
This bug report can be closed now. The submitted code completes without error
with gfortran 5.3 and 6.0.0.
>From gcc-bugs-return-522444-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 16 17:36:53 2016
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Subject: [Bug fortran/57093] Seg fault on internal output to a character scalar coarray
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Damian Rouson <damian at sourceryinstitute dot org> changed:
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--- Comment #5 from Damian Rouson <damian at sourceryinstitute dot org> ---
I'm marking this as resolved.
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Subject: [Bug fortran/57093] Seg fault on internal output to a character scalar coarray
Date: Sat, 16 Apr 2016 17:40:00 -0000
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--- Comment #6 from Damian Rouson <damian at sourceryinstitute dot org> ---
And it works with gfortran 4.9.3.
>From gcc-bugs-return-522446-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 16 17:42:47 2016
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Subject: [Bug libstdc++/70694] 50 experimental/filesystem/* failures on x86_64-apple-darwin10
Date: Sat, 16 Apr 2016 17:42:00 -0000
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--- Comment #3 from Iain Sandoe <iains at gcc dot gnu.org> ---
Created attachment 38291
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38291&action=edit
don't jam visibility for newer Darwin
Dominique, please could you try this?
>From gcc-bugs-return-522447-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 16 17:44:52 2016
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Subject: [Bug fortran/55905] [OOP] [F08] ICE for polymorphic dummy argument with an allocatable coarray component
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--- Comment #4 from Damian Rouson <damian at sourceryinstitute dot org> ---
The submitted code now compiles without error with gfortran 4.9.3, 5.3.0, and
6.0.0.
>From gcc-bugs-return-522448-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 16 18:21:04 2016
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Subject: [Bug target/50818] va_list is filled incorrectly in functions with ms_abi attribute on amd64
Date: Sat, 16 Apr 2016 18:21:00 -0000
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--- Comment #7 from H.J. Lu <hjl.tools at gmail dot com> ---
As a workaround, you can try
__builtin_ms_va_list ap;
__builtin_ms_va_start (ap, n);
__builtin_ms_va_end (ap);
instead of
__builtin_va_list ap;
__builtin_va_start (ap, n);
__builtin_va_end (ap);
>From gcc-bugs-return-522449-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 16 18:33:42 2016
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Subject: [Bug fortran/70696] New: [6.0] ICE on EVENT POST of host-associated EVENT_TYPE coarray
Date: Sat, 16 Apr 2016 18:33:00 -0000
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Bug ID: 70696
Summary: [6.0] ICE on EVENT POST of host-associated EVENT_TYPE
coarray
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: damian at sourceryinstitute dot org
Target Milestone: ---
With -fcoarray=lib, an internal compiler error occurs when compiling an EVENT
POST of an EVENT_TYPE coarray that accessed via host association. The ICE
disappears if the program is compiled with -fcoarray=single or if the event is
moved into the subroutine that contains the EVENT POST. Moving the event there
necessitates giving it the SAVE attribute, which appears to be unrelated to the
ICE because the ICE occurs with the event in the host even if given the SAVE
attribute in the host.
$ cat post_host_associated_event.f90
use iso_fortran_env
type(event_type) :: x[*]
contains
subroutine exchange
event post(x[1])
end subroutine
end
$ gfortran -fcoarray=single post_host_associated_event.f90
$ gfortran -fcoarray=lib post_host_associated_event.f90
post_host_associated_event.f90:5:0:
event post(x[1])
internal compiler error: in gfc_get_tree_for_caf_expr, at
fortran/trans-expr.c:1852
post_host_associated_event.f90:5:0: internal compiler error: Abort trap: 6
gfortran: internal compiler error: Abort trap: 6 (program f951)
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://trac.macports.org/newticket> for instructions.
$ gfortran --version
GNU Fortran (MacPorts gcc6 6-20160327_0) 6.0.0 20160327 (experimental)
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Subject: [Bug fortran/70697] ICE on EVENT WAIT with array element UNTIL_COUNT argument
Date: Sat, 16 Apr 2016 18:43:00 -0000
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--- Comment #1 from Damian Rouson <damian at sourceryinstitute dot org> ---
The ICE disappears if the UNTIL_COUNT is a scalar instead of an array element.
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Subject: [Bug fortran/70697] New: ICE on EVENT WAIT with array element UNTIL_COUNT argument
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Bug ID: 70697
Summary: ICE on EVENT WAIT with array element UNTIL_COUNT
argument
Product: gcc
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An internal compiler error (ICE) results when compiling an EVENT WAIT with an
UNTIL_COUNT argument that is an element of an array. This is a greatly reduced
version of the example in section A.3.3 of TS 18508, which was published last
year and is being incorporated into the draft Fortran 2015 standard. It would
be a great idea to make sure the whole example and the other events examples
compile correctly as many users will start with those.
$ cat tree.f90
use iso_fortran_env
integer :: nc(1)
type(event_type) done[*]
event wait(done,until_count=nc(1))
end
$ gfortran -fcoarray=single tree.f90
tree.f90:4:0:
event wait(done,until_count=nc(1))
internal compiler error: Segmentation fault: 11
tree.f90:4:0: internal compiler error: Abort trap: 6
gfortran: internal compiler error: Abort trap: 6 (program f951)
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://trac.macports.org/newticket> for instructions.
$ gfortran --version
GNU Fortran (MacPorts gcc6 6-20160327_0) 6.0.0 20160327 (experimental)
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Subject: [Bug target/50818] va_list is filled incorrectly in functions with ms_abi attribute on amd64
Date: Sat, 16 Apr 2016 18:48:00 -0000
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--- Comment #8 from David Woodhouse <dwmw2 at infradead dot org> ---
(In reply to H.J. Lu from comment #7)
> As a workaround, you can try
> __builtin_ms_va_*
> instead of
> __builtin_va_*
The problem is that in the UEFI build we don't *know* what ABI we'll be built
with for many functions. Some functions are explicitly marked EFIAPI, which
translates to __attribute__((ms_abi)). But any function which isn't explicitly
exported is functions are 'native'. Except where we got tired of the resulting
pain (this bug included), and added -fms-abi to the command line. Or when we're
building on a platform that *does* target Windows or Windows-like ABI natively.
Or when the wind is blowing in the other direction.
So hard-coding it doesn't work. We really need the builtins to do the right
thing for the function they're used from.
>From gcc-bugs-return-522453-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 16 18:55:36 2016
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Subject: [Bug c++/70018] [4.9/5/6/7 Regression] Possible issue around IPO and C++ comdats discovered as pure/const
Date: Sat, 16 Apr 2016 18:55:00 -0000
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--- Comment #14 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Author: hubicka
Date: Sat Apr 16 18:54:49 2016
New Revision: 235065
URL: https://gcc.gnu.org/viewcvs?rev=235065&root=gcc&view=rev
Log:
PR ipa/70018
* cgraph.c (cgraph_set_const_flag_1): Only set as pure if
function does not bind to current def.
* ipa-pure-const.c (worse_state): Add FROM and TO parameters;
handle conservatively calls to functions that does not need to bind
to current def.
(check_call): Update call of worse_state.
(ignore_edge_for_nothrow): Update.
(ignore_edge_for_pure_const): Likewise.
(propagate_pure_const): Update calls to worse_state.
(skip_function_for_local_pure_const): Reformat comments.
* g++.dg/ipa/pure-const-1.C: New testcase.
* g++.dg/ipa/pure-const-2.C: New testcase.
* g++.dg/ipa/pure-const-3.C: New testcase.
Added:
trunk/gcc/testsuite/g++.dg/ipa/pure-const-1.C
trunk/gcc/testsuite/g++.dg/ipa/pure-const-2.C
trunk/gcc/testsuite/g++.dg/ipa/pure-const-3.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/cgraph.c
trunk/gcc/ipa-pure-const.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-522454-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 16 20:37:23 2016
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Subject: [Bug c++/70698] New: ICE in autoconf test for C++11 features
Date: Sat, 16 Apr 2016 20:37:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70698
Bug ID: 70698
Summary: ICE in autoconf test for C++11 features
Product: gcc
Version: unknown
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Created attachment 38292
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38292&action=edit
test case
GCC 6.0.1-RC-20160415 segfaults on the attached test program which is part of
AX_CXX_COMPILE_STDCXX_11 serial version number 13:
$ g++ -v
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/data/scratch/gcc-6.0.1/libexec/gcc/x86_64-pc-linux-gnu/6.0.1/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-6.0.1-RC-20160415/configure --enable-languages=c,c++
--prefix=/data/scratch/gcc-6.0.1 --enable-checking=release --disable-multilib
--disable-nls
Thread model: posix
gcc version 6.0.1 20160415 (prerelease) (GCC)
$ g++ conftest.cpp
conftest.cpp:165:27: in constexpr expansion of
'cxx11::test_constexpr::strlen_c<char>(((const char*)"1"))'
conftest.cpp:161:24: in constexpr expansion of
'cxx11::test_constexpr::strlen_c_r<char>(((const char*)s), 0ul)'
conftest.cpp:154:29: in constexpr expansion of
'cxx11::test_constexpr::strlen_c_r<char>((((const char*)s) + 1u), (((long
unsigned int)acc) + 1ul))'
conftest.cpp:165:44: internal compiler error: Segmentation fault
static_assert(strlen_c("1") == 1UL, "");
^
0xabb5bf crash_signal
../../gcc-6.0.1-RC-20160415/gcc/toplev.c:335
0x6ed483 get_fundef_copy
../../gcc-6.0.1-RC-20160415/gcc/cp/constexpr.c:1010
0x6ed483 cxx_eval_call_expression
../../gcc-6.0.1-RC-20160415/gcc/cp/constexpr.c:1453
0x6ef2af cxx_eval_constant_expression
../../gcc-6.0.1-RC-20160415/gcc/cp/constexpr.c:3556
0x6ef399 cxx_eval_conditional_expression
../../gcc-6.0.1-RC-20160415/gcc/cp/constexpr.c:1798
0x6ef399 cxx_eval_constant_expression
../../gcc-6.0.1-RC-20160415/gcc/cp/constexpr.c:3855
0x6f0d91 cxx_eval_store_expression
../../gcc-6.0.1-RC-20160415/gcc/cp/constexpr.c:3123
0x6eeadc cxx_eval_constant_expression
../../gcc-6.0.1-RC-20160415/gcc/cp/constexpr.c:3633
0x6ee6c8 cxx_eval_constant_expression
../../gcc-6.0.1-RC-20160415/gcc/cp/constexpr.c:3645
0x6ee8c5 cxx_eval_constant_expression
../../gcc-6.0.1-RC-20160415/gcc/cp/constexpr.c:3672
0x6ee8c5 cxx_eval_constant_expression
../../gcc-6.0.1-RC-20160415/gcc/cp/constexpr.c:3672
0x6eda0a cxx_eval_call_expression
../../gcc-6.0.1-RC-20160415/gcc/cp/constexpr.c:1494
0x6ef2af cxx_eval_constant_expression
../../gcc-6.0.1-RC-20160415/gcc/cp/constexpr.c:3556
0x6f0d91 cxx_eval_store_expression
../../gcc-6.0.1-RC-20160415/gcc/cp/constexpr.c:3123
0x6eeadc cxx_eval_constant_expression
../../gcc-6.0.1-RC-20160415/gcc/cp/constexpr.c:3633
0x6ee6c8 cxx_eval_constant_expression
../../gcc-6.0.1-RC-20160415/gcc/cp/constexpr.c:3645
0x6ee8c5 cxx_eval_constant_expression
../../gcc-6.0.1-RC-20160415/gcc/cp/constexpr.c:3672
0x6ee8c5 cxx_eval_constant_expression
../../gcc-6.0.1-RC-20160415/gcc/cp/constexpr.c:3672
0x6eda0a cxx_eval_call_expression
../../gcc-6.0.1-RC-20160415/gcc/cp/constexpr.c:1494
0x6ef2af cxx_eval_constant_expression
../../gcc-6.0.1-RC-20160415/gcc/cp/constexpr.c:3556
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
The last snapshot 20160410 still worked (as do all previous releases).
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Subject: [Bug middle-end/66240] RFE: extend -falign-xyz syntax
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--- Comment #4 from Denis Vlasenko <vda.linux at googlemail dot com> ---
Created attachment 38293
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38293&action=edit
Proposed patch
This patch implements -falign-functions=N[,M] for now, with the eye for easy
extension to other -falign options.
I tested that with -falign-functions=N (tried 8, 15, 16, 17...) the alignment
directives are the same before and after the patch:
-falign-functions=8 generates ".p2align 3,,7" before and after.
-falign-functions=17 generates ".p2align 5,,16" before and after.
I tested that -falign-functions=N,N (two equal paramenters) works exactly like
-falign-functions=N.
Patch drops currently performed forced alignment to 8 if requested alignment is
higher than 8: before the patch, -falign-functions=9 was generating
.p2align 4,,8
.p2align 3
which means "Align to 16 if the skip is 8 bytes or less; else align to 8".
After the patch, "p2align 3" is not emitted.
I drop that because I ultimately want to do something like
-falign-functions=64,8 - IOW, I want to align functions by 64 bytes, but only
if that entails a skip of less than 8 bytes - otherwise I want **no alignment
at all**. The forced ".p2align 3" interferes with that intention.
This is an RFC-patch, IOW: I don't insist on removal of ".p2align 3"
generation. I imagine that it should be retained for compat, and yet another
option should be added to suppress it if desired (how about
"-mno-8byte-code-subalign"? Argh...)
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Subject: [Bug fortran/70696] [6.0] ICE on EVENT POST of host-associated EVENT_TYPE coarray
Date: Sat, 16 Apr 2016 20:57:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-16
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed from 5.3 up to trunk (7.0). With 4.9 I get the errors
pr70696.f90:2.18:
type(event_type) :: x[*]
1
Error: Derived type 'event_type' at (1) is being used before it is defined
pr70696.f90:5.4:
event post(x[1])
1
Error: Unclassifiable statement at (1)
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70150
--- Comment #15 from psturm at computervoice dot com ---
Tested with hjl/pr70150 branch and no unexpected errors using
--enable-default-pie.
However, when testing the same branch with both --enable-default-pie and
--enable-default-ssp, a couple new failures did show up (in addition to the 11
expected failures):
FAIL: gcc.target/i386/cleanup-1.c execution test
FAIL: gcc.target/i386/cleanup-2.c execution test
I am not sure whether this is relevant or not?
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Subject: [Bug target/1078] Problems with attributes documentation
Date: Sat, 16 Apr 2016 23:23:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=1078
--- Comment #15 from sandra at gcc dot gnu.org ---
Author: sandra
Date: Sat Apr 16 23:22:52 2016
New Revision: 235066
URL: https://gcc.gnu.org/viewcvs?rev=235066&root=gcc&view=rev
Log:
2016-04-16 Sandra Loosemore <sandra@codesourcery.com>
PR target/1078
gcc/cp/
* tree.c (cxx_attribute_table): Remove "com_interface" entry.
(handle_com_interface_attribute): Delete.
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/tree.c
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Subject: [Bug target/1078] Problems with attributes documentation
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sandra at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #16 from sandra at gcc dot gnu.org ---
The com_interface attribute has been deleted on trunk now. Per comment #14, I
think that was the last thing to be done for this issue, so I'm marking it
fixed now.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/70696] [6.0] ICE on EVENT POST of host-associated EVENT_TYPE coarray
Date: Sun, 17 Apr 2016 00:15:00 -0000
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--- Comment #2 from Damian Rouson <damian at sourceryinstitute dot org> ---
If I recall correctly, support for events just barely missed being included in
5.3, but will appear versions 5.4 and higher. There probably is no reason way
to port this back to the 4.9 branch because versions earlier than 5.0 could not
support producing multi-image executables and events only make sense in a
multi-image setting.
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Subject: [Bug other/68875] Add pass parameter to TERMINATE_PASS_LIST
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--- Comment #2 from vries at gcc dot gnu.org ---
Author: vries
Date: Sun Apr 17 05:21:50 2016
New Revision: 235071
URL: https://gcc.gnu.org/viewcvs?rev=235071&root=gcc&view=rev
Log:
Add pass parameter to TERMINATE_PASS_LIST
2016-04-17 Tom de Vries <tom@codesourcery.com>
PR other/68875
* pass_manager.h (TERMINATE_PASS_LIST): Add pass argument.
* passes.c (pass_manager::pass_manager): Declare and init p_start in
INSERT_PASSES_AFTER. Add pass parameter to TERMINATE_PASS_LIST, and
check if it's equal to p_start.
* passes.def: Add arguments to TERMINATE_PASS_LISTs.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/pass_manager.h
trunk/gcc/passes.c
trunk/gcc/passes.def
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Subject: [Bug other/70183] fdump-rtl-all-flags doesn't have impact on vzeroupper pass
Date: Sun, 17 Apr 2016 05:22:00 -0000
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--- Comment #6 from vries at gcc dot gnu.org ---
Author: vries
Date: Sun Apr 17 05:22:04 2016
New Revision: 235072
URL: https://gcc.gnu.org/viewcvs?rev=235072&root=gcc&view=rev
Log:
Propagate dump flags in pass_manager::register_pass
2016-04-17 Tom de Vries <tom@codesourcery.com>
PR other/70183
* passes.c (pass_manager::register_pass): Propagate pflags.
* gcc.target/i386/vzeroupper-dump-flags.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/vzeroupper-dump-flags.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/passes.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug tree-optimization/70256] Add debug_varinfo and debug_varmap
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--- Comment #4 from vries at gcc dot gnu.org ---
Author: vries
Date: Sun Apr 17 05:22:19 2016
New Revision: 235073
URL: https://gcc.gnu.org/viewcvs?rev=235073&root=gcc&view=rev
Log:
Add debug_varinfo and debug_varmap
2016-04-17 Tom de Vries <tom@codesourcery.com>
PR tree-optimization/70256
* tree-ssa-structalias.c (dump_varinfo, debug_varinfo, dump_varmap)
(debug_varmap): New function.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree-ssa-structalias.c
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Subject: [Bug other/70185] fdump-tree-all-graph produces invalid dot files
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--- Comment #5 from vries at gcc dot gnu.org ---
Author: vries
Date: Sun Apr 17 05:22:33 2016
New Revision: 235074
URL: https://gcc.gnu.org/viewcvs?rev=235074&root=gcc&view=rev
Log:
Only finalize dot files that have been initialized
2016-04-17 Tom de Vries <tom@codesourcery.com>
PR other/70185
* tree-pass.h (class opt_pass): Remove graph_dump_initialized member.
* dumpfile.h (struct dump_file_info): Add graph_dump_initialized field.
* dumpfile.c (dump_files): Initialize graph_dump_initialized field.
* passes.c (finish_optimization_passes): Only call
finish_graph_dump_file if dfi->graph_dump_initialized.
(execute_function_dump, pass_init_dump_file): Use
dfi->graph_dump_initialized instead of pass->graph_dump_initialized.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/dumpfile.c
trunk/gcc/dumpfile.h
trunk/gcc/passes.c
trunk/gcc/tree-pass.h
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Subject: [Bug other/70433] backslashes lost in dot file
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--- Comment #3 from vries at gcc dot gnu.org ---
Author: vries
Date: Sun Apr 17 05:23:15 2016
New Revision: 235077
URL: https://gcc.gnu.org/viewcvs?rev=235077&root=gcc&view=rev
Log:
Handle backslash in pp_write_text_as_dot_label_to_stream
2016-04-17 Tom de Vries <tom@codesourcery.com>
PR other/70433
* pretty-print.c (pp_write_text_as_dot_label_to_stream): Escape
backslash in label.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/pretty-print.c
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Subject: [Bug other/68875] Add pass parameter to TERMINATE_PASS_LIST
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vries at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
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--- Comment #3 from vries at gcc dot gnu.org ---
Patch committed, test-case not possible. Marking resolved-fixed.
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Subject: [Bug other/70183] fdump-rtl-all-flags doesn't have impact on vzeroupper pass
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--- Comment #7 from vries at gcc dot gnu.org ---
Patch with test-case committed, marking resolved-fixed.
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Subject: [Bug tree-optimization/70256] Add debug_varinfo and debug_varmap
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--- Comment #5 from vries at gcc dot gnu.org ---
Patch committed, test-case not possible. Marking resolved-fixed.
>From gcc-bugs-return-522469-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 17 05:37:52 2016
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Subject: [Bug other/70185] fdump-tree-all-graph produces invalid dot files
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----------------------------------------------------------------------------
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--- Comment #6 from vries at gcc dot gnu.org ---
patch committed, no test-case. A test-case is possible (f.i. test for presence
of '{' in omplower.dot), but blocked on review of
https://gcc.gnu.org/ml/gcc-patches/2016-03/msg01077.html .
Marking resolved-fixed.
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Subject: [Bug other/70433] backslashes lost in dot file
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--- Comment #4 from vries at gcc dot gnu.org ---
patch committed, no test-case. A test-case is possible, but blocked on review
of https://gcc.gnu.org/ml/gcc-patches/2016-03/msg01077.html .
--- Comment #5 from vries at gcc dot gnu.org ---
patch committed, no test-case. A test-case is possible, but blocked on review
of https://gcc.gnu.org/ml/gcc-patches/2016-03/msg01077.html .
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Subject: [Bug other/70433] backslashes lost in dot file
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What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #4 from vries at gcc dot gnu.org ---
patch committed, no test-case. A test-case is possible, but blocked on review
of https://gcc.gnu.org/ml/gcc-patches/2016-03/msg01077.html .
--- Comment #5 from vries at gcc dot gnu.org ---
patch committed, no test-case. A test-case is possible, but blocked on review
of https://gcc.gnu.org/ml/gcc-patches/2016-03/msg01077.html .
>From gcc-bugs-return-522472-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 17 05:46:03 2016
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Subject: [Bug testsuite/70699] New: Add pr70161.c test-case
Date: Sun, 17 Apr 2016 05:45:00 -0000
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Bug ID: 70699
Summary: Add pr70161.c test-case
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The fix for pr70161 needs a testcase.
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Subject: [Bug testsuite/70699] Add pr70161.c test-case
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What |Removed |Added
----------------------------------------------------------------------------
Keywords| |patch
--- Comment #1 from vries at gcc dot gnu.org ---
https://gcc.gnu.org/ml/gcc-patches/2016-03/msg01077.html
>From gcc-bugs-return-522474-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 17 06:25:44 2016
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Subject: [Bug tree-optimization/70700] New: ICE using -fdump-tree-all-graph option
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Bug ID: 70700
Summary: ICE using -fdump-tree-all-graph option
Product: gcc
Version: 6.0
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Priority: P3
Component: tree-optimization
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Reported by t.w. lefering by email:
------------------------------------------------------------
Using GCC snapshot gcc-6-20160410.tar.bz2 and the
-fdump-tree-all-graph option to generate graph data
internal gcc error happens when compiling Linux sparse:
parse.c:1362:22: internal compiler error: in operator[], at vec.h:714
in tree-ssa-structalias.c line 1212 is build_pred_graph()
at line 1229 the get_varinfo() using vec.h routines hits the internal compiler
error:
for (j = 1; j < FIRST_REF_NODE; j++)
{
if (!get_varinfo (j)->is_special_var)
bitmap_set_bit (graph->direct_nodes, j);
}
Looks like the variable j gets out-of-range then hit this assert in vec.h:714
in vec.h:
template<typename T, typename A>
inline T &
vec<T, A, vl_embed>::operator[] (unsigned ix)
{
gcc_checking_assert (ix < m_vecpfx.m_num);
return m_vecdata[ix];
}
And this is in the generated output:
parse.c: In function 'const_qualifier':
parse.c:1362:22: internal compiler error: in operator[], at vec.h:714
static struct token *const_qualifier(struct token *next, struct decl_state
*ctx)
^~~~~~~~~~~~~~~
0xce89e7 vec<variable_info*, va_heap, vl_embed>::operator[](unsigned int)
../.././gcc/vec.h:714
0xce89e7 vec<variable_info*, va_heap, vl_ptr>::operator[](unsigned int)
../.././gcc/vec.h:1180
0xce89e7 get_varinfo
../.././gcc/tree-ssa-structalias.c:333
0xcf7cd7 get_varinfo
../.././gcc/vec.h:714
0xcf7cd7 build_pred_graph
../.././gcc/tree-ssa-structalias.c:1231
0xcf7cd7 solve_constraints
../.././gcc/tree-ssa-structalias.c:6961
0xcf9593 compute_points_to_sets
../.././gcc/tree-ssa-structalias.c:7062
0xcf9593 compute_may_aliases()
../.././gcc/tree-ssa-structalias.c:7389
0xa5afdc execute_function_todo
../.././gcc/passes.c:1930
0xa5baab execute_todo
../.././gcc/passes.c:2010
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
------------------------------------------------------------
>From gcc-bugs-return-522475-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 17 06:27:48 2016
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--- Comment #1 from vries at gcc dot gnu.org ---
Created attachment 38294
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38294&action=edit
parse.i
>From gcc-bugs-return-522476-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 17 06:29:02 2016
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Subject: [Bug tree-optimization/70700] ICE using -fdump-tree-all-graph option
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Last reconfirmed| |2016-04-17
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--- Comment #2 from vries at gcc dot gnu.org ---
Confirmed using:
...
$ gcc -O3 parse.i -fdump-tree-all-graph
...
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Subject: [Bug testsuite/70699] Add dot-file scan to pr70161.c test-case
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--- Comment #2 from vries at gcc dot gnu.org ---
pinged: https://gcc.gnu.org/ml/gcc-patches/2016-04/msg00783.html
>From gcc-bugs-return-522478-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 17 08:16:52 2016
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Subject: [Bug libstdc++/64883] FAIL: 17_intro/headers/c++*/all_attributes.cc (test for excess errors) on x86_64-apple-darwin10
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--- Comment #40 from Iain Sandoe <iains at gcc dot gnu.org> ---
Created attachment 38295
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Further tweak for Darwin10
Sorry, this one slipped thorough the cracks, and I guess we're no longer in the
"apply as obvious" state. It's hardly critical (but also pretty safe).
Dominique, can we double-check it works as expected?
>From gcc-bugs-return-522479-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 17 10:34:55 2016
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Subject: [Bug tree-optimization/70701] New: incomplete value numbering when memcpy-ing from array
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Bug ID: 70701
Summary: incomplete value numbering when memcpy-ing from array
Product: gcc
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Looking at PR58483 (seems more relevant than PR62156), I tried this simple
testcase:
int a[]={1,2,3};
int f(){
// a[0]=42;
int*b=__builtin_malloc(12);
__builtin_memcpy(b,a,12);
return b[0];
}
Compiling with -O3 -fdisable-tree-forwprop1 -fdisable-tree-forwprop2
-fdisable-tree-forwprop3 (otherwise forwprop turns memcpy into a MEM
assignment), we fail to optimize b[0] to 1. We do go through the memcpy path in
vn_reference_lookup_3 and that part seems to work fine, but then that's it, we
don't grab the value. If I add a statement a[0]=42; at the beginning of the
function, then we do get that value in FRE1.
>From gcc-bugs-return-522480-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 17 12:48:38 2016
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Subject: [Bug sanitizer/70624] [6/7 Regression] Several hundred asan failures with 6.0 on x86_64-apple-darwin10.8
Date: Sun, 17 Apr 2016 12:48:00 -0000
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Iain Sandoe <iains at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |iains at gcc dot gnu.org
--- Comment #9 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to Dominique d'Humieres from comment #8)
> This is fixed on x86_64-apple-darwin10 without regression on
> x86_64-apple-darwin15 by the following patch
>
> --- ../_clean/libsanitizer/asan/asan_mac.cc 2015-11-23 10:17:05.000000000
> +0100
> +++ libsanitizer/asan/asan_mac.cc 2016-04-15 13:22:01.000000000 +0200
> @@ -97,10 +97,14 @@ void DisableReexec() {
> reexec_disabled = true;
> }
>
> -extern "C" double dyldVersionNumber;
> +extern "C" SANITIZER_WEAK_ATTRIBUTE double dyldVersionNumber;
> static const double kMinDyldVersionWithAutoInterposition = 360.0;
>
> bool DyldNeedsEnvVariable() {
> + // Although sanitizer support was added to LLVM on Darwin 10.7+, GCC users
> + // still may want use them on older systems. On older Darwin platforms,
> dyld
> + // doesn't export dyldVersionNumber symbol and we simply can return true.
> + if (!&dyldVersionNumber) return true;
> // If running on OS X 10.11+ or iOS 9.0+, dyld will interpose even if
> // DYLD_INSERT_LIBRARIES is not set. However, checking OS version via
> // GetMacosVersion() doesn't work for the simulator. Let's instead check
This looks good to (and works for) me;
please can we ask for this to be committed "upstream" and then imported?
BTW, there _are_ folks using both GCC and LLVM on Darwin10 for "day job" stuff,
so it is still very much of interest.
>From gcc-bugs-return-522481-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 17 13:26:45 2016
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Subject: [Bug fortran/65795] Segfault (invalid write) for ALLOCATE statement involving COARRAYS
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No complaints so far, closing.
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Subject: [Bug fortran/66911] ICE on allocate character with source as a derived type component
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--- Comment #10 from vehre at gcc dot gnu.org ---
No complaints so far, closing.
>From gcc-bugs-return-522483-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 17 13:28:03 2016
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Subject: [Bug fortran/67538] ICE with invalid source allocation
Date: Sun, 17 Apr 2016 13:28:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67538
vehre at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |FIXED
--- Comment #7 from vehre at gcc dot gnu.org ---
No complaints so far, closing.
>From gcc-bugs-return-522484-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 17 14:35:57 2016
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From: "olivier at gautherot dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70702] New: Build failure of ARM cross compiler under Cygwin - libc_name_p
Date: Sun, 17 Apr 2016 14:35:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70702
Bug ID: 70702
Summary: Build failure of ARM cross compiler under Cygwin -
libc_name_p
Product: gcc
Version: 5.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: olivier at gautherot dot net
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Created attachment 38296
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38296&action=edit
Build script for reference
I tried to build an ARM cross compiler under Cygwin64 and got an error (symbol
not found) on libc_name_p. After some investigation, I tracked the root cause
down to the files gcc/cp/cfns.{h,gperf}. I suggest the following fix:
Replace
"const char * libc_name_p (const char *, unsigned int);"
with
"static const char * libc_name_p (const char *, unsigned int);"
By adding the "static" keyword, we ensure that the function is properly
inlined. There are 3 occurrences in cfns.h and cfns.gperf.
I attached my build scripts for reference.
Note: The same build scripts worked fine under Linux (Ubuntu, Centos) and
FreeBSD, with various versions of GCC and Clang/FreeBSD. The reason why GCC on
Cygwin misbehaved is still unclear.
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From: "olivier at gautherot dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70702] Build failure of ARM cross compiler under Cygwin - libc_name_p
Date: Sun, 17 Apr 2016 15:14:00 -0000
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--- Comment #1 from Olivier Gautherot <olivier at gautherot dot net> ---
Additional note: by adding the static keyword, I got the following error:
In file included from ../../gcc/cp/except.c:1023:0:
cfns.gperf: In function 'const char* libc_name_p(const char*, unsigned int)':
cfns.gperf:101:1: error: 'const char* libc_name_p(const char*, unsigned int)'
rdeclared inline with 'gnu_inline' attribute
cfns.gperf:26:21: note: 'const char* libc_name_p(const char*, unsigned int)'
prviously declared here
cfns.gperf: At global scope:
cfns.gperf:26:21: warning: inline function 'const char* libc_name_p(const char*
unsigned int)' used but never defined
Makefile:1065: recipe for target 'cp/except.o' failed
make: *** [cp/except.o] Error 1
It was fixed by declaring consistently the prototype in the 3 occurences as:
#ifdef __GNUC__
__inline
#ifdef __GNUC_STDC_INLINE__
__attribute__ ((__gnu_inline__))
#endif
#endif
static const char * libc_name_p (const char *, unsigned int);
>From gcc-bugs-return-522486-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 17 15:23:39 2016
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Subject: [Bug middle-end/70703] New: Regression in register usage on x86
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$ cat bad.c
unsigned ud_x_641_mul(unsigned x) {
/* optimized version of x / 641 */
return ((unsigned long long)x * 0x663d81) >> 32;
}
With gcc from current svn:
$ gcc -m32 -fomit-frame-pointer -O2 bad.c -S && cat bad.s
...
ud_x_641_mul:
.cfi_startproc
movl $6700417, %ecx
movl %ecx, %eax
mull 4(%esp)
movl %edx, %ecx
movl %ecx, %eax
ret
Same result with -Os. Note two pointless mov insns.
gcc 5.3.1 is "better", it adds only one unnecessary insn:
ud_x_641_mul:
.cfi_startproc
movl $6700417, %ecx
movl %ecx, %eax
mull 4(%esp)
movl %edx, %eax
ret
gcc 4.4.x and 4.7.2 were generating this code, which looks optimal:
ud_x_641_mul:
.cfi_startproc
movl $6700417, %eax
mull 4(%esp)
movl %edx, %eax
ret
I did not test other versions of gcc yet.
>From gcc-bugs-return-522487-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 17 15:48:33 2016
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Subject: [Bug target/30354] -Os doesn't optimize a/CONST even if it saves size.
Date: Sun, 17 Apr 2016 15:48:00 -0000
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--- Comment #17 from Denis Vlasenko <vda.linux at googlemail dot com> ---
Any chance of this being finally done?
I proposed a simple, working patch in 2007, it's 2016 now and all these years
users of -Os suffer from slow divisions in important cases usch as "signed_int
/ 16" and "unsigned_int / 10".
I understand your desire to do it "better", to make gcc count size of div/idiv
more accurately, without having to lie to it in the insn size table. But with
you guys constantly distracted by other, more important issues, what happened
here is that _nothing_ was done...
I retested the patch with current svn (the future 7.0.0), using test program
with 15000 divisions from comment 3:
Bumping division cost up to 8 is no longer enough, this only makes gcc to be
better towards some (not all) 2^N divisors. Bumping div cost to 9..12 helps
with most of remaining 2^N divisor cases, and for two exceptional cases of x /
641 and x / 6700417. Only bumping div cost to 13, namely, changing div costs as
follows:
const
struct processor_costs ix86_size_cost = {/* costs for tuning for size */
...
{COSTS_N_BYTES (13), /* cost of a divide/mod for QI */
COSTS_N_BYTES (13), /* HI */
COSTS_N_BYTES (13), /* SI */
COSTS_N_BYTES (13), /* DI */
COSTS_N_BYTES (15)}, /* other */
makes it work as it used to in 4.4.x days: out of 15000 cases in t.c, 975 cases
are optimized so that they don't use "div" anymore.
This should have made it smaller too... but did not, because meanwhile gcc has
regressed in another area. Now it inserts superfluous register moves. See bug
70703 which I just filed. Essentially, instead of
movl $6700417, %eax
mull 4(%esp)
movl %edx, %eax
ret
gcc generates:
movl $6700417, %ecx
movl %ecx, %eax ????
mull 4(%esp)
movl %edx, %ecx ????
movl %ecx, %eax
ret
Sizes of compiled testcases (objN denotes cost of "div", A...D correspond to
costs of 10..13):
text data bss dec hex filename
242787 0 0 242787 3b463 gcc.obj3/divmod-7.0.0-Os.o
242813 0 0 242813 3b47d gcc.obj8/divmod-7.0.0-Os.o
242838 0 0 242838 3b496 gcc.obj9/divmod-7.0.0-Os.o
242844 0 0 242844 3b49c gcc.objA/divmod-7.0.0-Os.o
242844 0 0 242844 3b49c gcc.objB/divmod-7.0.0-Os.o
242844 0 0 242844 3b49c gcc.objC/divmod-7.0.0-Os.o
247573 0 0 247573 3c715 gcc.objD/divmod-7.0.0-Os.o
So.
Any chance of this patch being accepted sometime before 2100? ;)
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Subject: [Bug target/30354] -Os doesn't optimize a/CONST even if it saves size.
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--- Comment #18 from Denis Vlasenko <vda.linux at googlemail dot com> ---
Created attachment 38297
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38297&action=edit
Comparison of generated code with 7.0.0.svn on i86
With div cost of 3:
00000000 <ud_x_100>:
- 0: 8b 44 24 04 mov 0x4(%esp),%eax
- 4: b9 64 00 00 00 mov $0x64,%ecx
- 9: 31 d2 xor %edx,%edx
- b: f7 f1 div %ecx
- d: c3 ret
With div cost of 13:
+ 0: b9 1f 85 eb 51 mov $0x51eb851f,%ecx
+ 5: 89 c8 mov %ecx,%eax
+ 7: f7 64 24 04 mull 0x4(%esp)
+ b: 89 d1 mov %edx,%ecx
+ d: 89 c8 mov %ecx,%eax
+ f: c1 e8 05 shr $0x5,%eax
+ 12: c3 ret
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Subject: [Bug c++/70018] [4.9/5/6/7 Regression] Possible issue around IPO and C++ comdats discovered as pure/const
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--- Comment #15 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Author: hubicka
Date: Sun Apr 17 16:04:05 2016
New Revision: 235081
URL: https://gcc.gnu.org/viewcvs?rev=235081&root=gcc&view=rev
Log:
PR ipa/70018
* cgraph.h (cgraph_node::set_const_flag,
cgraph_node::set_pure_flag): Update prototype to return bool;
update comment.
* cgraph.c (cgraph_node::call_for_symbol_thunks_and_aliases): Thunks
of interposable symbol are interposable, too.
(cgraph_set_const_flag_1): Rename to ...
(set_const_flag_1): ... this one; change to self recursive function
instead of call_for_symbol_thunks_and_aliases. Handle correctly
clearnig the flag in all variants and also virtual thunks of const
functions are pure; track if any change was done.
(cgraph_node::set_const_flag): Update.
(struct set_pure_flag_info): New struct.
(cgraph_set_pure_flag_1): Rename to ...
(set_pure_flag_1): ... this one; take set_pure_flag_info parameter
rather than pointer encoded flags; track if any changes was done;
handle correctly clearning flag and setting flag of aliases already
declared const.
(cgraph_node::set_pure_flag): Update.
(cgraph_node::set_nothrow_flag): Handle correctly clearning the flag.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/cgraph.c
trunk/gcc/cgraph.h
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Subject: [Bug bootstrap/70704] New: [6 Regressions] AIX bootstrap comparison failure
Date: Sun, 17 Apr 2016 17:07:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70704
Bug ID: 70704
Summary: [6 Regressions] AIX bootstrap comparison failure
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
Assignee: unassigned at gcc dot gnu.org
Reporter: dje at gcc dot gnu.org
Target Milestone: ---
GCC 6.0 RC fails bootstrap on AIX due to comparison failure of all object files
for --enable-checking=release. This appears to be an unstable sort issue.
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From: "dje at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/70704] [6 Regressions] AIX bootstrap comparison failure
Date: Sun, 17 Apr 2016 17:08:00 -0000
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David Edelsohn <dje at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-17
Ever confirmed|0 |1
--- Comment #1 from David Edelsohn <dje at gcc dot gnu.org> ---
Cnofirmed.
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From: "townsend at astro dot wisc.edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/70705] New: Associate construct with array section causes ICE
Date: Sun, 17 Apr 2016 17:14:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70705
Bug ID: 70705
Summary: Associate construct with array section causes ICE
Product: gcc
Version: 5.3.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: townsend at astro dot wisc.edu
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Created attachment 38298
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38298&action=edit
Example program
In the example program attached, compilation (gfortran -o ice ice.f90) causes
the following ICE:
ice.f90:16:0:
x = 0.
1
internal compiler error: in gfc_get_element_type, at fortran/trans-types.c:1201
ice.f90:16:0: internal compiler error: Abort trap: 6
gfortran.exec: internal compiler error: Abort trap: 6 (program f951)
cheers,
Rich
>From gcc-bugs-return-522493-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 17 17:22:22 2016
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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/70705] Associate construct with array section causes ICE
Date: Sun, 17 Apr 2016 17:22:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
It looks like a duplicate of pr49636.
*** This bug has been marked as a duplicate of bug 49636 ***
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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/49636] [F03] ASSOCIATE construct confused with slightly complicated case
Date: Sun, 17 Apr 2016 17:22:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |townsend at astro dot wisc.edu
--- Comment #9 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
*** Bug 70705 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-522495-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 17 17:50:10 2016
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From: "hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/70706] New: [7 Regression] r235082 caused bootstrap failure
Date: Sun, 17 Apr 2016 17:50:00 -0000
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Bug ID: 70706
Summary: [7 Regression] r235082 caused bootstrap failure
Product: gcc
Version: 6.0
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CC: hubicka at ucw dot cz
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r235082 caused:
libbackend.a(graphite.o): In function `graphite_finalize(bool)':
/export/gnu/import/git/gcc-test-profiled/bld/gcc/../../src-trunk/gcc/graphite.c:259:
undefined reference to `tree_estimate_probability()'
collect2: error: ld returned 1 exit status
../../src-trunk/gcc/lto/Make-lang.in:71: recipe for target 'lto1' failed
make[6]: *** [lto1] Error 1
when GCC is configured with
--prefix=/usr/7.0.0 --enable-clocale=gnu --with-system-zlib --enable-shared
--with-demangler-in-ld --enable-libmpx --with-build-config=bootstrap-lto
--disable-werror --with-fpmath=sse
--enable-languages=c,c++,fortran,java,lto,objc
and built with
# make -j8 profiledbootstrap
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From: "hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug testsuite/70150] Additonal test failures with --enable-default-pie
Date: Sun, 17 Apr 2016 17:53:00 -0000
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--- Comment #16 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to psturm from comment #15)
> Tested with hjl/pr70150 branch and no unexpected errors using
> --enable-default-pie.
>
> However, when testing the same branch with both --enable-default-pie and
> --enable-default-ssp, a couple new failures did show up (in addition to the
> 11 expected failures):
>
> FAIL: gcc.target/i386/cleanup-1.c execution test
> FAIL: gcc.target/i386/cleanup-2.c execution test
>
> I am not sure whether this is relevant or not?
Do they fail with only --enable-default-ssp?
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From: "hubicka at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/70706] [7 Regression] r235082 caused bootstrap failure
Date: Sun, 17 Apr 2016 18:05:00 -0000
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--- Comment #1 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Author: hubicka
Date: Sun Apr 17 18:04:51 2016
New Revision: 235085
URL: https://gcc.gnu.org/viewcvs?rev=235085&root=gcc&view=rev
Log:
PR bootstrap/70706
* graphite.c (graphite_finalize): Update call to
tree_estimate_probability.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/graphite.c
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From: "hubicka at ucw dot cz" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/70706] [7 Regression] r235082 caused bootstrap failure
Date: Sun, 17 Apr 2016 18:07:00 -0000
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--- Comment #2 from Jan Hubicka <hubicka at ucw dot cz> ---
> libbackend.a(graphite.o): In function `graphite_finalize(bool)':
> /export/gnu/import/git/gcc-test-profiled/bld/gcc/../../src-trunk/gcc/graphite.c:259:
> undefined reference to `tree_estimate_probability()'
> collect2: error: ld returned 1 exit status
> ../../src-trunk/gcc/lto/Make-lang.in:71: recipe for target 'lto1' failed
> make[6]: *** [lto1] Error 1
I have comitted the following as obvious. It is not clear to me what graphite
is
trying to reach here and it will definitly leat to random results with profile
feedback (we will likely end up with guessed profile but non-zero counts)
but we can deal with that incrementally.
PR bootstrap/70706
* graphite.c (graphite_finalize): Update call to
tree_estimate_probability.
Index: graphite.c
===================================================================
--- graphite.c (revision 235064)
+++ graphite.c (working copy)
@@ -256,7 +256,7 @@ graphite_finalize (bool need_cfg_cleanup
cleanup_tree_cfg ();
profile_status_for_fn (cfun) = PROFILE_ABSENT;
release_recorded_exits (cfun);
- tree_estimate_probability ();
+ tree_estimate_probability (false);
}
free_original_copy_tables ();
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Subject: [Bug bootstrap/70706] [7 Regression] r235082 caused bootstrap failure
Date: Sun, 17 Apr 2016 18:27:00 -0000
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--- Comment #3 from graham.stott at btinternet dot com ---
still  fails predict.h needs updating prototype also
-------- Original message --------
From: "hubicka at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
Date: 17/04/2016 19:05 (GMT+00:00)
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/70706] [7 Regression] r235082 caused bootstrap failure
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70706
--- Comment #1 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Author: hubicka
Date: Sun Apr 17 18:04:51 2016
New Revision: 235085
URL: https://gcc.gnu.org/viewcvs?rev=235085&root=gcc&view=rev
Log:
       PR bootstrap/70706
       * graphite.c (graphite_finalize): Update call to
       tree_estimate_probability.
Modified:
   trunk/gcc/ChangeLog
   trunk/gcc/graphite.c
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Subject: [Bug bootstrap/70706] [7 Regression] r235082 caused bootstrap failure
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--- Comment #4 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Author: hubicka
Date: Sun Apr 17 18:30:21 2016
New Revision: 235086
URL: https://gcc.gnu.org/viewcvs?rev=235086&root=gcc&view=rev
Log:
PR bootstrap/70706
* predict.h (tree_estimate_probability): Update prototype.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/predict.h
>From gcc-bugs-return-522501-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 17 19:15:35 2016
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Subject: [Bug c++/27557] OpenMP threadprivate directive does not work with non-POD types
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Sameer Sheorey <ssameer at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ssameer at gmail dot com
--- Comment #17 from Sameer Sheorey <ssameer at gmail dot com> ---
The second fragment still fails in gcc 5.3.1 (OpenSuse 13.2). I noticed that
the C++11 version succeeds:
struct A {
A() {}
};
thread_local A a;
Is it possible to migrate this to the OpenMP implementation as well?
>From gcc-bugs-return-522502-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 17 19:41:21 2016
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Subject: [Bug libgcc/68082] issue on 64 bit shift
Date: Sun, 17 Apr 2016 19:41:00 -0000
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--- Comment #5 from angelo <angelo70 at gmail dot com> ---
Any news ?
Trying also --with-arch=cf breaks the compilation.
So i can't have in any way valid libgcc code i.e. for m5307.
>From gcc-bugs-return-522503-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 17 19:44:00 2016
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Subject: [Bug libgcc/68467] libgcc, compilation for target m68k-linux breaks in linux_atomic.c, #define COMMA ,
Date: Sun, 17 Apr 2016 19:44:00 -0000
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--- Comment #2 from angelo <angelo70 at gmail dot com> ---
Well the final error is :
/home/angelo/archivio/aziende/sysam/buildall/gcc-5.2.0/libgcc/config/m68k/linux-atomic.c:198:13:
internal compiler error: in emit_library_call_value_1, at calls.c:4401
return (__sync_val_compare_and_swap_##WIDTH (ptr, oldval, newval) \
^
/home/angelo/archivio/aziende/sysam/buildall/gcc-5.2.0/libgcc/config/m68k/linux-atomic.c:203:1:
note: in expansion of macro 'SUBWORD_BOOL_CAS'
SUBWORD_BOOL_CAS (unsigned char, 1)
I tried also gcc 5.3.0, same error using --with-arch=cf.
Seems like m68k branch is not considered at all.
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Subject: [Bug tree-optimization/70701] incomplete value numbering when memcpy-ing from array
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--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
Er, sorry, a "const" disappeared when I posted.
const int a[]={1,2,3};
int f(){
int*b=__builtin_malloc(12);
__builtin_memcpy(b,a,12);
return b[0];
}
this fails to optimize (without forwprop).
int a[]={1,2,3};
int f(){
a[0]=42;
int*b=__builtin_malloc(12);
__builtin_memcpy(b,a,12);
return b[0];
}
this is optimized.
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Subject: [Bug c++/70702] Build failure of ARM cross compiler under Cygwin - libc_name_p
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--- Comment #2 from Olivier Gautherot <olivier at gautherot dot net> ---
Last correction: the build under FreeBSD uses GCC 5.3 and requires the same fix
to build.
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Subject: [Bug bootstrap/70704] [6 Regressions] AIX bootstrap comparison failure
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--- Comment #2 from David Edelsohn <dje at gcc dot gnu.org> ---
Created attachment 38299
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38299&action=edit
Stage2 sbitmap.s
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--- Comment #3 from David Edelsohn <dje at gcc dot gnu.org> ---
Created attachment 38300
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38300&action=edit
Stage3 sbitmap.s
>From gcc-bugs-return-522508-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 17 20:38:09 2016
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Subject: [Bug bootstrap/70704] [6 Regressions] AIX bootstrap comparison failure
Date: Sun, 17 Apr 2016 20:38:00 -0000
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--- Comment #4 from David Edelsohn <dje at gcc dot gnu.org> ---
sbitmap.s was one of the smaller files. All of the debugging information seems
to be present, but emitted in a different order in the stage2 versus stage3.
>From gcc-bugs-return-522509-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 17 20:41:54 2016
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From: "dethbomb at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/70707] New: INT_MAX used before it is defined
Date: Sun, 17 Apr 2016 20:41:00 -0000
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Bug ID: 70707
Summary: INT_MAX used before it is defined
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Im a complete newb to linux and gcc so please forgive if this is not the
correct way to do things. Or if this is not actually wrong then please ignore.
I saw what appeared to me to be incorrect C code while browsing "limits.h".
The following 2 cpp lines.
# define INT_MIN (-INT_MAX - 1)
# define INT_MAX 2147483647
INT_MAX is used before it is defined. The preprocessor seems to accept this in
gcc because INT_MAX is defined immediately afterwards.But if a different
preprocessor would be used this could cause problems?
printf("%i\n",INT_MIN);
does give the correct value. But im not sure if its because it may be defined
elsewhere in my source code thru some other header file.
regards,
Lewis
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Subject: [Bug libfortran/70684] [4.9/5/6/7 Regression] incorrect reading of values from file on Windows
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--- Comment #6 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
The regression occurred at r200238, which was a fix for PR57633.
I am working on a fix.
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Subject: [Bug sanitizer/70683] [7 Regression] -fcompare-debug bug with -fsanitizedress
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|6.0 |7.0
>From gcc-bugs-return-522511-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 17 22:38:34 2016
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Subject: [Bug sanitizer/70683] [7 Regression] -fcompare-debug bug with -fsanitizedress
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[6/7 Regression] |[7 Regression]
|-fcompare-debug bug with |-fcompare-debug bug with
|-fsanitize=address |-fsanitize=address
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
In gcc 6.x this is masked off by not making the constexpr fn table deletable.
>From gcc-bugs-return-522513-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 17 22:45:34 2016
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Subject: [Bug bootstrap/70704] [6 Regressions] AIX bootstrap comparison failure
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Target Milestone|--- |6.0
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Strange, I thought the default bootstrap is to build stage2 without debug info,
while you have stabs in both files.
Have you looked at where the differences start first (build both the stage2 and
stage3 with -fdump-tree-all-nouid -fdump-rtl-all-nouid --param
min-nondebug-insn-uid=10000 ?
Are the stage2/stage3 sbitmap.c sources built with the same options?
Do you know which sort is unstable, or is that just a guess?
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Subject: [Bug testsuite/70150] Additonal test failures with --enable-default-pie
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--- Comment #17 from psturm at computervoice dot com ---
Yes, they do appear when only using --enable-default-ssp, so I don't think they
are relevant.
>From gcc-bugs-return-522515-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 00:02:58 2016
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Subject: [Bug testsuite/70150] Additonal test failures with --enable-default-pie
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--- Comment #18 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to psturm from comment #17)
> Yes, they do appear when only using --enable-default-ssp, so I don't think
> they are relevant.
I suggest you open a new bug report if you haven't done so.
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Subject: [Bug testsuite/70230] 11 test regressions when building GCC 6 with --enable-default-ssp
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--- Comment #2 from psturm at computervoice dot com ---
2 new failures appeared when testing with only --enable-default-ssp using the
hjl/pr70150 branch:
> FAIL: gcc.target/i386/cleanup-1.c execution test
> FAIL: gcc.target/i386/cleanup-2.c execution test
Are these also to be expected or is it something more?
>From gcc-bugs-return-522517-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 00:16:54 2016
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From: "psturm at computervoice dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug testsuite/70150] Additonal test failures with --enable-default-pie
Date: Mon, 18 Apr 2016 00:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70150
--- Comment #19 from psturm at computervoice dot com ---
H.J,
Done.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70230
On a separate topic, do you know an Intel colleague named Kirill Shutemov? I am
having a problem with a kernel warning about a pmd_set_huge failure and an ACPI
warning on my Xeon D-1540 development system when I load the ixgbe driver. The
driver guys told me to post on linux-mm and I did, but no reply just yet. It
seems Kirill Shumetov is active in the kernel memory management and this is an
issue manifesting on an Intel system (both CPU and 10g ethernet). If not him,
do you know anyone else I can contact about this?
Thanks,
Paul
----- Original Message -----
From: "hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: "psturm" <psturm@computervoice.com>
Sent: Sunday, April 17, 2016 6:02:45 PM
Subject: [Bug testsuite/70150] Additonal test failures with
--enable-default-pie
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70150
--- Comment #18 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to psturm from comment #17)
> Yes, they do appear when only using --enable-default-ssp, so I don't think
> they are relevant.
I suggest you open a new bug report if you haven't done so.
>From gcc-bugs-return-522518-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 00:37:16 2016
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From: "kobalicek.petr at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70708] New: Suboptimal code generated when using _mm_set_sd (X64)
Date: Mon, 18 Apr 2016 00:37:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70708
Bug ID: 70708
Summary: Suboptimal code generated when using _mm_set_sd (X64)
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
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The ABI already uses XMM registers for floating point operations. Compare the
following two snippets:
double MyMinV1(double a, double b) {
return a < b ? a : b;
}
double MyMinV2(double a, double b) {
__m128d x = _mm_set_sd(a);
__m128d y = _mm_set_sd(b);
return _mm_cvtsd_f64(_mm_min_sd(x, y));
}
And the code generated:
MyMinV1(double, double):
minsd xmm0, xmm1
ret
MyMinV2(double, double):
movsd QWORD PTR [rsp-24], xmm0
movsd QWORD PTR [rsp-16], xmm1
movsd xmm0, QWORD PTR [rsp-24]
movsd xmm1, QWORD PTR [rsp-16]
minsd xmm0, xmm1
ret
The problem is obvious, the _mm_set_sd() intrinsic really generates movsd even
if the content is already in the XMM register in the right place. I checked
also CLang and it generates an optimal code for both functions.
You can reproduce the test-case here:
https://gcc.godbolt.org/#compilers:!((compiler:g6,options:'-O2+-Wall+',source:'%23include+%3Cxmmintrin.h%3E%0A%0Adouble+MyMinV1(double+a,+double+b)+%7B%0A++return+a+%3C+b+%3F+a+:+b%3B%0A%7D%0A%0Adouble+MyMinV2(double+a,+double+b)+%7B%0A++__m128d+x+%3D+_mm_set_sd(a)%3B%0A++__m128d+y+%3D+_mm_set_sd(b)%3B%0A++return+_mm_cvtsd_f64(_mm_min_sd(x,+y))%3B%0A%7D%0A')),filterAsm:(commentOnly:!t,directives:!t,intel:!t,labels:!t),version:3
It looks like all GCC versions are affected.
>From gcc-bugs-return-522519-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 01:25:12 2016
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From: "su at cs dot ucdavis.edu" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70709] New: gcc hangs on valid C++ code on x86_64-linux-gnu
Date: Mon, 18 Apr 2016 01:25:00 -0000
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Bug ID: 70709
Summary: gcc hangs on valid C++ code on x86_64-linux-gnu
Product: gcc
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The following code causes an ICE when compiled with the current gcc trunk on
x86_64-linux-gnu.
It also affects 4.8.x and later, and is a regression from 4.7.x.
$ g++-trunk -v
Using built-in specs.
COLLECT_GCC=g++-trunk
COLLECT_LTO_WRAPPER=/usr/local/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/7.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto
--prefix=/usr/local/gcc-trunk --disable-bootstrap
Thread model: posix
gcc version 7.0.0 20160417 (experimental) [trunk revision 235070] (GCC)
$
$ g++-4.7 -c small.cpp
$ clang++-3.8 -c small.cpp
$
$ g++-trunk -c small.cpp^C
$ timeout -s 9 10 g++-trunk -c small.cpp
Killed
$
---------------------
struct A
{
A (int);
};
struct B
{
B () {}
A a[0];
};
struct C
{
C () {}
B a[0];
};
>From gcc-bugs-return-522520-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 04:30:10 2016
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Subject: [Bug rtl-optimization/70710] New: [5/6/7 Regression] Compile time hog w/ -O -g -fpeel-loops
Date: Mon, 18 Apr 2016 04:30:00 -0000
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Bug ID: 70710
Summary: [5/6/7 Regression] Compile time hog w/ -O -g
-fpeel-loops
Product: gcc
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gcc 5.3.0 and later takes infinite time to compile the following reduced
snippet w/ -O[123] (or -Ofast) -g -fpeel-loops on x86_64-pc-linux-gnu:
long int mh = 0;
int du = 0;
void
vg (void)
{
int qe;
char u1;
for (qe = 0; qe < 16; ++qe)
{
mh &= du;
du &= mh;
u1 = du;
}
mh = 0;
}
Several top calls brought up by perf:
48.52% cc1 [.] nonzero_bits1
17.45% cc1 [.] cached_nonzero_bits
14.68% cc1 [.] reg_nonzero_bits_for_combine
1.29% cc1 [.] bitmap_bit_p
1.12% cc1 [.] target_default_pointer_address_modes_p
0.85% cc1 [.] val_signbit_known_set_p
0.27% cc1 [.] rtx_equal_p
0.26% cc1 [.] commutative_operand_precedence
0.22% cc1 [.] simplify_binary_operation_1
0.18% cc1 [.] simplify_replace_fn_rtx
0.15% cc1 [.] volatile_insn_p
0.12% cc1 [.] simplify_binary_operation
0.12% cc1 [.] avoid_constant_pool_reference
0.11% cc1 [.] ggc_internal_alloc
0.10% cc1 [.] simplify_const_binary_operation
0.07% cc1 [.] simplify_associative_operation
0.06% cc1 [.] validate_subreg
0.05% cc1 [.] swap_commutative_operands_p
0.05% cc1 [.] copy_rtx
0.04% cc1 [.] simplify_gen_binary
0.02% cc1 [.] simplify_subreg
The original code had stuck for about 14 hours in compilation before I noticed
that.
>From gcc-bugs-return-522521-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 04:38:17 2016
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From: "jvdelisle at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libfortran/70684] [4.9/5/6/7 Regression] incorrect reading of values from file on Windows
Date: Mon, 18 Apr 2016 04:38:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70684
--- Comment #7 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
The following patch fixes the issue.
diff --git a/libgfortran/io/list_read.c b/libgfortran/io/list_read.c
index e24b3922..b8e174c5 100644
--- a/libgfortran/io/list_read.c
+++ b/libgfortran/io/list_read.c
@@ -197,7 +197,7 @@ check_buffers (st_parameter_dt *dtp)
}
done:
- dtp->u.p.at_eol = (c == '\n' || c == EOF);
+ dtp->u.p.at_eol = (c == '\n' || c == '\r' || c == EOF);
return c;
}
Regression tested on trunk with Linux.
>From gcc-bugs-return-522522-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 06:21:43 2016
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From: "glisse at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70708] Suboptimal code generated when using _mm_set_sd (X64)
Date: Mon, 18 Apr 2016 06:21:00 -0000
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--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
Looks complicated. _mm_set_sd(x) returns {x,0}, and I don't think the calling
convention guarantees anything about the unused part of SSE registers.
_mm_min_sd uses the high part of its first argument. So we need to understand
things about minsd. IIRC minsd is represented internally as a vec_merge of
minpd and the first argument, so a vec_select on that might notice that we are
only using the minpd part of the merge, but wouldn't simplify. If we
represented scalar operations as {min(x[0],y[0]),x[1]} (vec_concat), things
would likely simplify, but I believe that approach was rejected by rth (it
doesn't scale to avx, etc). On the other hand, IIRC he was in favor of a
representation as vec_merge(vec_dup(min(x[0],y[0])),x,1), which I guess would
simplify as well (it is quite possible that I am misremembering. In any case, I
probably have an early prototype lying around somewhere, maybe on
gcc-patches@).
We could expand _mm_min_sd to {min(x[0],y[0]),x[1]} (well, some variant of min)
early (in the header, or in gimple), but then we would probably fail to detect
that this is a single instruction and regress elsewhere...
(note that for a simple __m128d f(double x){return _mm_set_sd(x);}, gcc either
goes through the stack or uses movhpd, while clang happily uses movq %xmm0,
%xmm0)
>From gcc-bugs-return-522523-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 07:37:51 2016
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Subject: [Bug c++/70690] [6/7 Regression] r235002 miscompiles tcmalloc
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70690
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
Priority|P3 |P1
Target Milestone|--- |6.0
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Recent wrong-code caused/exposed by rejects-valid fix.
>From gcc-bugs-return-522524-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 07:39:27 2016
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Subject: [Bug middle-end/70689] [6/7 Regression] ICE on valid code at -O1 in 32-bit mode on x86_64-linux-gnu in curr_insn_transform, at lra-constraints.c:3564
Date: Mon, 18 Apr 2016 07:39:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code, ra
Target| |i?86-*-*
CC| |law at gcc dot gnu.org,
| |vmakarov at gcc dot gnu.org
Target Milestone|--- |6.0
Summary|ICE on valid code at -O1 in |[6/7 Regression] ICE on
|32-bit mode on |valid code at -O1 in 32-bit
|x86_64-linux-gnu in |mode on x86_64-linux-gnu in
|curr_insn_transform, at |curr_insn_transform, at
|lra-constraints.c:3564 |lra-constraints.c:3564
>From gcc-bugs-return-522525-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 07:40:29 2016
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Subject: [Bug rtl-optimization/70687] Undefined shift in change_zero_ext in combine.c
Date: Mon, 18 Apr 2016 07:40:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70687
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Use wide_int instead?
>From gcc-bugs-return-522526-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 07:47:43 2016
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Subject: [Bug tree-optimization/70686] GIMPLE if-conversion slows down code
Date: Mon, 18 Apr 2016 07:47:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70686
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target|-march=core2 / |x86_64-*-*
|-march=nocona (alternating) |
Status|UNCONFIRMED |NEW
Keywords| |missed-optimization
Last reconfirmed| |2016-04-18
Component|c |tree-optimization
CC| |rguenth at gcc dot gnu.org
Host|Intel Q8200 Quad Core / |
|linux 4.5.0 x64 |
Ever confirmed|0 |1
Summary|-fprofile-generate (not |GIMPLE if-conversion slows
|fprofile-use) somehow |down code
|produces much faster binary |
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
It's not so mind-blowing - it's simply that -fprofile-generate makes our
GIMPLE level if-conversion no longer apply. Without -fprofile-generate
we if-convert the loop into
for (i = 1; i <100000001; i++)
{
...
b = b + (b < 1.00001) ? i + 12.43 : 0.0;
...
}
thus we always evaluate the i + 12.43 and one additional addition of zero.
We do this to eventually enable vectorization but without any check
on whether it would be profitable when not vectorizing (your testcase
shows it's not profitable).
Confirmed. -fno-tree-loop-if-convert should fix it in this particular case.
>From gcc-bugs-return-522527-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 07:48:31 2016
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Subject: [Bug libfortran/70684] [4.9/5/6/7 Regression] incorrect reading of values from file on Windows
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----------------------------------------------------------------------------
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>From gcc-bugs-return-522528-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 07:50:09 2016
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Subject: [Bug sanitizer/70683] [7 Regression] -fcompare-debug bug with -fsanitizedress
Date: Mon, 18 Apr 2016 07:50:00 -0000
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Yes, iterative_hash_expr needs to match operand_equal_p (I'd add checking bits
to operand_equal_p that makes sure equal trees hash the same).
>From gcc-bugs-return-522530-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 07:51:47 2016
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Subject: [Bug rtl-optimization/70681] [6/7 Regression] FAIL: gcc.dg/ira-shrinkwrap-prep-2.c gcc.dg/pr10474.c on arm and powerpc
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
>From gcc-bugs-return-522529-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 07:51:08 2016
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Subject: [Bug target/70682] [7 Regression] -fcompare-debug building LLVM with checking=release compiler on ppc64le
Date: Mon, 18 Apr 2016 07:51:00 -0000
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
We should really really move all that various magic "get me a fancy name" stuff
into a middle-end helper.
>From gcc-bugs-return-522531-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 07:56:21 2016
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Subject: [Bug bootstrap/70704] [6 Regressions] AIX bootstrap comparison failure
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Priority|P3 |P1
Status|NEW |WAITING
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Waiting for David to investigate.
>From gcc-bugs-return-522532-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 07:59:00 2016
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Subject: [Bug rtl-optimization/70703] [6/7 regression] Regression in register usage on x86
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |6.0
>From gcc-bugs-return-522533-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 08:06:34 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/70701] incomplete value numbering when memcpy-ing from array
Date: Mon, 18 Apr 2016 08:06:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70701
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2016-04-18
Ever confirmed|0 |1
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
I have a simple patch.
>From gcc-bugs-return-522534-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 08:18:37 2016
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70695] [C++14] ICE in a herdly complicated compile-time metaprogramming
Date: Mon, 18 Apr 2016 08:18:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70695
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-18
Ever confirmed|0 |1
Known to fail| |5.3.0, 6.0
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed with GCC 5 and GCC 6.
Internal compiler error: Error reporting routines re-entered.
0x81dafd push_tinst_level_loc(tree_node*, unsigned int)
/space/rguenther/src/svn/trunk3/gcc/cp/pt.c:9075
0x81dabf push_tinst_level(tree_node*)
/space/rguenther/src/svn/trunk3/gcc/cp/pt.c:9059
0x849f1b fn_type_unification(tree_node*, tree_node*, tree_node*, tree_node*
const*, unsigned int, tree_node*, unification_kind_t, int, bool, bool)
/space/rguenther/src/svn/trunk3/gcc/cp/pt.c:17738
0x781368 add_template_candidate_real
/space/rguenther/src/svn/trunk3/gcc/cp/call.c:3093
0x7817ef add_template_candidate
/space/rguenther/src/svn/trunk3/gcc/cp/call.c:3171
0x7894c8 add_candidates
/space/rguenther/src/svn/trunk3/gcc/cp/call.c:5344
0x7956b8 build_new_method_call_1
/space/rguenther/src/svn/trunk3/gcc/cp/call.c:8293
0x7964fe build_new_method_call(tree_node*, tree_node*, vec<tree_node*, va_gc,
vl_embed>**, tree_node*, int, tree_node**, int)
/space/rguenther/src/svn/trunk3/gcc/cp/call.c:8489
0x844c12 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
/space/rguenther/src/svn/trunk3/gcc/cp/pt.c:16620
0x833b43 tsubst(tree_node*, tree_node*, int, tree_node*)
/space/rguenther/src/svn/trunk3/gcc/cp/pt.c:13528
0x8c177b dump_template_bindings
/space/rguenther/src/svn/trunk3/gcc/cp/error.c:351
0x8c883f dump_substitution
/space/rguenther/src/svn/trunk3/gcc/cp/error.c:1452
0x8c9ab6 dump_function_decl
/space/rguenther/src/svn/trunk3/gcc/cp/error.c:1592
0x8c7674 dump_decl
/space/rguenther/src/svn/trunk3/gcc/cp/error.c:1198
0x8cfb42 decl_to_string
/space/rguenther/src/svn/trunk3/gcc/cp/error.c:2957
0x8d1b98 cp_printer
/space/rguenther/src/svn/trunk3/gcc/cp/error.c:3537
0x1b0959e pp_format(pretty_printer*, text_info*)
/space/rguenther/src/svn/trunk3/gcc/pretty-print.c:634
0x1b09999 pp_format_verbatim(pretty_printer*, text_info*)
/space/rguenther/src/svn/trunk3/gcc/pretty-print.c:692
0x1b09ff1 pp_verbatim(pretty_printer*, char const*, ...)
/space/rguenther/src/svn/trunk3/gcc/pretty-print.c:893
0x8d14e1 print_instantiation_partial_context_line
/space/rguenther/src/svn/trunk3/gcc/cp/error.c:3362
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
>From gcc-bugs-return-522535-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 08:20:30 2016
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Subject: [Bug c++/70698] ICE in autoconf test for C++11 features
Date: Mon, 18 Apr 2016 08:20:00 -0000
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Possibly a duplicate of PR70685.
>From gcc-bugs-return-522536-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 08:24:59 2016
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Subject: [Bug rtl-optimization/70710] [5/6/7 Regression] Compile time hog w/ -O -g -fpeel-loops
Date: Mon, 18 Apr 2016 08:24:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-18
Target Milestone|--- |5.4
Ever confirmed|0 |1
Known to fail| |5.1.0
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. Caused by -g.
>From gcc-bugs-return-522537-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 08:26:14 2016
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Subject: [Bug c++/70709] [4.9/5/6/7 Regression] gcc hangs on valid C++ code on x86_64-linux-gnu
Date: Mon, 18 Apr 2016 08:26:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Known to work| |4.7.4
Keywords| |compile-time-hog
Last reconfirmed| |2016-04-18
Ever confirmed|0 |1
Summary|gcc hangs on valid C++ code |[4.9/5/6/7 Regression] gcc
|on x86_64-linux-gnu |hangs on valid C++ code on
| |x86_64-linux-gnu
Target Milestone|--- |4.9.4
Known to fail| |4.8.0
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
>From gcc-bugs-return-522538-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 08:28:58 2016
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Subject: [Bug target/70708] Suboptimal code generated when using _mm_set_sd (X64)
Date: Mon, 18 Apr 2016 08:28:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |x86_64-*-*
CC| |hjl.tools at gmail dot com
Component|c++ |target
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Depending on the details of the x86_64 ABI and _mm_set_sd semantics this is
a LLVM wrong-code bug or a GCC missed optimization.
>From gcc-bugs-return-522539-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 08:31:34 2016
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Subject: [Bug bootstrap/70706] [7 Regression] r235082 caused bootstrap failure
Date: Mon, 18 Apr 2016 08:31:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Version|6.0 |7.0
Target Milestone|--- |7.0
>From gcc-bugs-return-522540-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 08:35:39 2016
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Subject: [Bug c++/70690] [6/7 Regression] r235002 miscompiles tcmalloc
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--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I think the new GCC is correct here and the old one accidentally just got it
"right".
We have:
CentralFreeListPadded Static::central_cache_[kNumClasses];
Which is of type:
class CentralFreeListPadded : public CentralFreeListPaddedTo<
sizeof(CentralFreeList) % 64>
CentralFreeListPaddedTo is defined as either:
class CentralFreeListPaddedTo : public CentralFreeList
or
class CentralFreeListPaddedTo<0> : public CentralFreeList
CentralFreeList has the following constructor:
CentralFreeList() : lock_(base::LINKER_INITIALIZED) { }
So it just happened that LINKER_INITIALIZED was also zero:
namespace base {
enum LinkerInitialized { LINKER_INITIALIZED };
}
So this is a bug in tcmalloc as far as I can tell.
Before the call to the constructor was not done but after it is done.
>From gcc-bugs-return-522541-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 08:36:26 2016
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Subject: [Bug target/70711] New: GCC ARM big-endian ARMv8.1 code fails.
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Bug ID: 70711
Summary: GCC ARM big-endian ARMv8.1 code fails.
Product: gcc
Version: unknown
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Priority: P3
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Assignee: unassigned at gcc dot gnu.org
Reporter: mwahab at gcc dot gnu.org
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Created attachment 38301
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38301&action=edit
Fix ARMv8.1-A big-endian builds.
The config/arm/bpabi.h file wasn't updated when ARMv8.1 support went in. This
means that when GCC is targeting big-endian ARMv8.1, the code it generates can
fail to execute.
The attached patch is being tested for armeb-none-eabi.
>From gcc-bugs-return-522542-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 08:43:51 2016
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Subject: [Bug target/70711] GCC ARM big-endian ARMv8.1 code fails.
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Ramana Radhakrishnan <ramana at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
Target| |arm
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-18
CC| |ramana at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> ---
We're missing an update of BE8_LINK_SPEC - can you post this on the mailing
list and I'll ack it for trunk.
While technically not a regression, it's something we need fixed for GCC 6
though RMs need to approve it .
Ramana
>From gcc-bugs-return-522543-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 08:52:27 2016
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Subject: [Bug c++/70698] ICE in autoconf test for C++11 features
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----------------------------------------------------------------------------
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
It is.
*** This bug has been marked as a duplicate of bug 70685 ***
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Subject: [Bug c++/70685] [6/7 Regression] ICE: Segmentation fault
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |kreckel at ginac dot de
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
*** Bug 70698 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-522545-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 08:54:26 2016
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Subject: [Bug testsuite/70699] Add dot-file scan to pr70161.c test-case
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--- Comment #3 from vries at gcc dot gnu.org ---
Author: vries
Date: Mon Apr 18 08:53:41 2016
New Revision: 235095
URL: https://gcc.gnu.org/viewcvs?rev=235095&root=gcc&view=rev
Log:
Add dot-file scans to pr70161.c
2016-04-18 Tom de Vries <tom@codesourcery.com>
PR testsuite/70699
* gcc.dg/pr70161.c: Add dot-file scans.
* lib/scandump.exp (dump-suffix): Return suffix after first dot char,
instead of after last dot char.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/pr70161.c
trunk/gcc/testsuite/lib/scandump.exp
>From gcc-bugs-return-522546-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 08:56:29 2016
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Subject: [Bug testsuite/70699] Add dot-file scan to pr70161.c test-case
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vries at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
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--- Comment #4 from vries at gcc dot gnu.org ---
Testsuite patch committed, marking resolved-fixed.
>From gcc-bugs-return-522547-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 09:00:41 2016
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Subject: [Bug c++/70690] [6/7 Regression] r235002 miscompiles tcmalloc
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--- Comment #3 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #2)
> I think the new GCC is correct here and the old one accidentally just got it
> "right".
> We have:
> CentralFreeListPadded Static::central_cache_[kNumClasses];
>
>
> Which is of type:
> class CentralFreeListPadded : public CentralFreeListPaddedTo<
> sizeof(CentralFreeList) % 64>
>
> CentralFreeListPaddedTo is defined as either:
> class CentralFreeListPaddedTo : public CentralFreeList
>
> or
> class CentralFreeListPaddedTo<0> : public CentralFreeList
>
> CentralFreeList has the following constructor:
> CentralFreeList() : lock_(base::LINKER_INITIALIZED) { }
>
>
> So it just happened that LINKER_INITIALIZED was also zero:
> namespace base {
> enum LinkerInitialized { LINKER_INITIALIZED };
> }
>
>
> So this is a bug in tcmalloc as far as I can tell.
>
> Before the call to the constructor was not done but after it is done.
Could you come up with a small testcase?
>From gcc-bugs-return-522548-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 09:21:30 2016
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From: "jgreenhalgh at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/70707] INT_MAX used before it is defined
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James Greenhalgh <jgreenhalgh at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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CC| |jgreenhalgh at gcc dot gnu.org
Resolution|--- |INVALID
--- Comment #1 from James Greenhalgh <jgreenhalgh at gcc dot gnu.org> ---
Hi Lewis,
This bugzilla is for reporting bugs against GCC, rather than asking for usage
help. Feel free to post the same message on gcc-help@gcc.gnu.org where you're
more likely to get an answer.
Thanks,
James Greenhalgh
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Subject: [Bug middle-end/37870] [4.3 Regression] ICE in extract_bit_field_1
Date: Mon, 18 Apr 2016 09:26:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=37870
--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Apr 18 09:25:46 2016
New Revision: 235103
URL: https://gcc.gnu.org/viewcvs?rev=235103&root=gcc&view=rev
Log:
2016-04-18 Richard Biener <rguenther@suse.de>
PR middle-end/37870
* expmed.c (extract_bit_field_1): Remove broken case
using a wider MODE_INT mode.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/expmed.c
>From gcc-bugs-return-522551-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 09:34:09 2016
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From: "alekshs at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/70686] GIMPLE if-conversion slows down code
Date: Mon, 18 Apr 2016 09:34:00 -0000
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--- Comment #2 from alekshs at hotmail dot com ---
(In reply to Richard Biener from comment #1)
> It's not so mind-blowing - it's simply that -fprofile-generate makes our
> GIMPLE level if-conversion no longer apply. Without -fprofile-generate
> we if-convert the loop into
>
> for (i = 1; i <100000001; i++)
> {
> ...
>
> b = b + (b < 1.00001) ? i + 12.43 : 0.0;
> ...
> }
>
> thus we always evaluate the i + 12.43 and one additional addition of zero.
>
> We do this to eventually enable vectorization but without any check
> on whether it would be profitable when not vectorizing (your testcase
> shows it's not profitable).
>
> Confirmed. -fno-tree-loop-if-convert should fix it in this particular case.
Aha, thanks for the swift reply.
Regarding profitability, I should note that the PGO misses entirely the fact
that 20 mulsd could become 10 mulpd:
400560: f2 0f 59 e9 mulsd %xmm1,%xmm5
400564: f2 0f 59 e1 mulsd %xmm1,%xmm4
400568: f2 0f 59 d9 mulsd %xmm1,%xmm3
40056c: f2 0f 59 d1 mulsd %xmm1,%xmm2
400570: f2 0f 59 e9 mulsd %xmm1,%xmm5
400574: f2 0f 59 e1 mulsd %xmm1,%xmm4
400578: f2 0f 59 d9 mulsd %xmm1,%xmm3
40057c: f2 0f 59 d1 mulsd %xmm1,%xmm2
400580: f2 0f 59 e9 mulsd %xmm1,%xmm5
400584: f2 0f 59 e1 mulsd %xmm1,%xmm4
400588: f2 0f 59 d9 mulsd %xmm1,%xmm3
40058c: f2 0f 59 d1 mulsd %xmm1,%xmm2
400590: f2 0f 59 e9 mulsd %xmm1,%xmm5
400594: f2 0f 59 e1 mulsd %xmm1,%xmm4
400598: f2 0f 59 d9 mulsd %xmm1,%xmm3
40059c: f2 0f 59 d1 mulsd %xmm1,%xmm2
4005a0: f2 0f 59 e9 mulsd %xmm1,%xmm5
4005a4: f2 0f 59 e1 mulsd %xmm1,%xmm4
4005a8: f2 0f 59 d9 mulsd %xmm1,%xmm3
4005ac: f2 0f 59 d1 mulsd %xmm1,%xmm2
...So there was job to be done there. That's at -03 -march=native btw (to
preserve accuracy, unlike -Ofast). Ofast too doesn't pack them. It kind of
splits to scalar muls and packed adds.
It's a similar situation with another such small benchmark I made where it was
doing 4 x sqrts all the time (with some stuff added when values got too low, so
as to keep going), but the 2x packed sqrts I did in asm were much faster than
the 4 scalar that gcc was generating (at every level of optimization and
profiling - it didn't do 2x packed... kept doing it 4x scalar). I'm attaching
the bench in the end.
It seems like gcc avoids packing instructions like the plague in non-array code
even when there are obvious and serious measurable benefits. Perhaps the
heuristics need some tune up for both profiled and non-profiled compilation.
-----
code of sqrtbench.c
-----
#include <math.h>
#include <stdio.h>
#include <time.h>
int main()
{
const double a = 911798473; // assigning some randomly chosen constants to
begin math functions
const double aa = 143314345;
const double aaa = 531432117;
const double aaaa = 343211418;
unsigned int i; //loop counter
double b; //variables that will be used for storing square roots
double bb;
double bbb;
double bbbb;
b = a; //assign some large values to the variables in order to start finding
square roots
bb = aa;
bbb = aaa;
bbbb = aaaa;
double score; // score
double time1; //how much time the program took
clock_t start, end; //stopwatch timers
start = clock();
for (i = 1; i <100000001; i++)
{
b=sqrt (b);
bb=sqrt(bb);
bbb=sqrt(bbb);
bbbb=sqrt(bbbb);
if (b <= 1.0000001) {b=b+i+12.432432432;}
if (bb <= 1.0000001) {bb=bb+i+15.4324442;}
if (bbb <= 1.0000001) {bbb=bbb+i+19.42884;}
if (bbbb <= 1.0000001) {bbbb=bbbb+i+34.481;}
}
end = clock();
time1 = ((double) (end - start)) / CLOCKS_PER_SEC * 1000;
score = (10000000 / time1); // Just a way to give a "score" insead of just
time elapsed.
// Baseline calibration is at 1000 points rewarded
for 10000ms delay...
// In other words if you finish 5 times faster, say
2000ms, you get 5000 points
printf("\nFinal number: %0.16f", (b+bb+bbb+bbbb)); // The number that
resulted from all the math functions - useful for checking math accuracy from
unsafe optimizations
if (b+bb+bbb+bbbb > 4.0000032938759028) {printf(" Result [INCORRECT -
4.0000032938759027 expected]");} //checking result
if (b+bb+bbb+bbbb < 4.0000032938759026) {printf(" Result [INCORRECT -
4.0000032938759027 expected]");} //checking result
printf("\nTime elapsed: %0.0f msecs", time1); // Time elapsed announced to
the user
printf("\nScore: %0.0f\n", score); // Score announced to the user
return 0;
}
-----end code ----
(the above generates, consistently, 4 sqrtsd instead of 2 sqrtpd, at -O3 and
PGO).
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Ramana Radhakrishnan <ramana at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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CC| |ramana at gcc dot gnu.org
Resolution|--- |FIXED
Target Milestone|--- |6.0
--- Comment #2 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> ---
Fixed then ?
>From gcc-bugs-return-522552-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 09:39:59 2016
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Subject: [Bug testsuite/70553] pr70496.c should exclude Thumb only targets
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--- Comment #3 from Thomas Preud'homme <thopre01 at gcc dot gnu.org> ---
(In reply to Ramana Radhakrishnan from comment #2)
> Fixed then ?
Yes, sorry.
>From gcc-bugs-return-522553-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 09:45:45 2016
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/70686] GIMPLE if-conversion slows down code
Date: Mon, 18 Apr 2016 09:45:00 -0000
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--- Comment #3 from rguenther at suse dot de <rguenther at suse dot de> ---
On Mon, 18 Apr 2016, alekshs at hotmail dot com wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70686
>
> --- Comment #2 from alekshs at hotmail dot com ---
> (In reply to Richard Biener from comment #1)
> > It's not so mind-blowing - it's simply that -fprofile-generate makes our
> > GIMPLE level if-conversion no longer apply. Without -fprofile-generate
> > we if-convert the loop into
> >
> > for (i = 1; i <100000001; i++)
> > {
> > ...
> >
> > b = b + (b < 1.00001) ? i + 12.43 : 0.0;
> > ...
> > }
> >
> > thus we always evaluate the i + 12.43 and one additional addition of zero.
> >
> > We do this to eventually enable vectorization but without any check
> > on whether it would be profitable when not vectorizing (your testcase
> > shows it's not profitable).
> >
> > Confirmed. -fno-tree-loop-if-convert should fix it in this particular case.
>
> Aha, thanks for the swift reply.
>
> Regarding profitability, I should note that the PGO misses entirely the fact
> that 20 mulsd could become 10 mulpd:
>
>
> 400560: f2 0f 59 e9 mulsd %xmm1,%xmm5
> 400564: f2 0f 59 e1 mulsd %xmm1,%xmm4
> 400568: f2 0f 59 d9 mulsd %xmm1,%xmm3
> 40056c: f2 0f 59 d1 mulsd %xmm1,%xmm2
> 400570: f2 0f 59 e9 mulsd %xmm1,%xmm5
> 400574: f2 0f 59 e1 mulsd %xmm1,%xmm4
> 400578: f2 0f 59 d9 mulsd %xmm1,%xmm3
> 40057c: f2 0f 59 d1 mulsd %xmm1,%xmm2
> 400580: f2 0f 59 e9 mulsd %xmm1,%xmm5
> 400584: f2 0f 59 e1 mulsd %xmm1,%xmm4
> 400588: f2 0f 59 d9 mulsd %xmm1,%xmm3
> 40058c: f2 0f 59 d1 mulsd %xmm1,%xmm2
> 400590: f2 0f 59 e9 mulsd %xmm1,%xmm5
> 400594: f2 0f 59 e1 mulsd %xmm1,%xmm4
> 400598: f2 0f 59 d9 mulsd %xmm1,%xmm3
> 40059c: f2 0f 59 d1 mulsd %xmm1,%xmm2
> 4005a0: f2 0f 59 e9 mulsd %xmm1,%xmm5
> 4005a4: f2 0f 59 e1 mulsd %xmm1,%xmm4
> 4005a8: f2 0f 59 d9 mulsd %xmm1,%xmm3
> 4005ac: f2 0f 59 d1 mulsd %xmm1,%xmm2
>
>
> ...So there was job to be done there. That's at -03 -march=native btw (to
> preserve accuracy, unlike -Ofast). Ofast too doesn't pack them. It kind of
> splits to scalar muls and packed adds.
vectorization is confused by you computing a reduction that is broken
by the if (). This isn't easily vectorized.
>From gcc-bugs-return-522554-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 10:29:16 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/70712] New: False positive from memory sanitizer with use of 'alignas'
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Bug ID: 70712
Summary: False positive from memory sanitizer with use of
'alignas'
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: sanitizer
Assignee: unassigned at gcc dot gnu.org
Reporter: rogero at howzatt dot demon.co.uk
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
Target Milestone: ---
Created attachment 38302
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38302&action=edit
Sample program demonstrating the false positive
The attached simple program generates a false positive with address sanitizer
on x86_64 Linux. The problem seems to be related to the alignas attribute on
the 'owner' object.
$ g++ -v
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/opt/reactor-buildkit/B2BH-BK2GIT44-2/gcc/bin/../libexec/gcc/x86_64-pc-linux-gnu/6.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../configure
--prefix=/data/bamboo.agent.home/xml-data/build-dir/B2BH-BKC0-JOB1/build/install
--enable-cloog-backend --enable-lto --enable-languages=c,c++
--enable-libstdcxx-time --enable-gold --enable-plugins --disable-multilib
--enable-werror=no --enable-libstdcxx-dual-abi
--with-default-libstdcxx-abi=gcc4-compatible
Thread model: posix
gcc version 6.0.0 20160413 (experimental) (GCC)
$ g++ -fsanitize=address stack-buffer-overflow.cxx && ./a.out
=================================================================
==12917==ERROR: AddressSanitizer: stack-buffer-overflow on address
0x7ffc5bb30020 at pc 0x7f1fede0851c bp 0x7ffc5bb2ff50 sp 0x7ffc5bb2f700
WRITE of size 8 at 0x7ffc5bb30020 thread T0
#0 0x7f1fede0851b in __interceptor_memset
../../../../libsanitizer/asan/asan_interceptors.cc:451
#1 0x4009d9 in Buffer::Buffer(Owner&)
(/home/rorr/test/prXXXXX/a.out+0x4009d9)
#2 0x40089a in main (/home/rorr/test/prXXXXX/a.out+0x40089a)
#3 0x3b81a1ed5c in __libc_start_main (/lib64/libc.so.6+0x3b81a1ed5c)
#4 0x4006e8 (/home/rorr/test/prXXXXX/a.out+0x4006e8)
Address 0x7ffc5bb30020 is located in stack of thread T0 at offset 160 in frame
#0 0x4007e5 in main (/home/rorr/test/prXXXXX/a.out+0x4007e5)
This frame has 2 object(s):
[64, 128) 'owner'
[192, 648) 'buffer' <== Memory access at offset 160 underflows this
variable
HINT: this may be a false positive if your program uses some custom stack
unwind mechanism or swapcontext
(longjmp and C++ exceptions *are* supported)
SUMMARY: AddressSanitizer: stack-buffer-overflow
../../../../libsanitizer/asan/asan_interceptors.cc:451 in __interceptor_memset
Shadow bytes around the buggy address:
0x10000b75dfb0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x10000b75dfc0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x10000b75dfd0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x10000b75dfe0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x10000b75dff0: f1 f1 f1 f1 f1 f1 f1 f1 00 00 00 00 00 00 00 00
=>0x10000b75e000: f2 f2 f2 f2[f2]f2 f2 f2 00 00 00 00 00 00 00 00
0x10000b75e010: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x10000b75e020: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x10000b75e030: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x10000b75e040: 00 f4 f4 f4 f3 f3 f3 f3 00 00 00 00 00 00 00 00
0x10000b75e050: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Shadow byte legend (one shadow byte represents 8 application bytes):
Addressable: 00
Partially addressable: 01 02 03 04 05 06 07
Heap left redzone: fa
Heap right redzone: fb
Freed heap region: fd
Stack left redzone: f1
Stack mid redzone: f2
Stack right redzone: f3
Stack partial redzone: f4
Stack after return: f5
Stack use after scope: f8
Global redzone: f9
Global init order: f6
Poisoned by user: f7
Container overflow: fc
Array cookie: ac
Intra object redzone: bb
ASan internal: fe
Left alloca redzone: ca
Right alloca redzone: cb
==12917==ABORTING
(Also fails with gcc 5.3.0)
>From gcc-bugs-return-522555-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 10:34:51 2016
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/70472] is_copy_constructible<vector<unique_ptr<int>>>::value is true
Date: Mon, 18 Apr 2016 10:34:00 -0000
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Askar Safin from comment #0)
> Also, please, make sure that std::is_copy_constructible gives right answers
> for all standard containers. And same for other type_traits
> (move_constructible etc).
That's easy to say but much harder to do.
> I don't know is
> std::is_copy_constructible<std::vector<std::unique_ptr<int>>>::value ==
> false required by the standard. If no, then, please, add this requirement to
> it.
It's not required, and it would be impossible to require it in general. The
problem is that std::vector does have a copy constructor, so the trait value is
true, but instantiating that constructor produces an error when the value_type
is not copyable. The trait is not required to instantiate the constructor (and
doing so would cause other problems).
> I noticed this bug when I tried to implement my own class template similar
> to std::experimental::optional. Compiler give big error message when I
> combine my class with other standard containers. If I add noexcept to my
> move constructor, then the error message disappears.
Types used with std::vector must be nothrow-move-constructible or
copy-constructible. If your type has a throwing move-ctor then vector will try
to copy it, which causes an instantiation error.
> So I think this bug
> somehow related to bug 55043 (bug #55043). If you want, I can describe this
> my class template in detail. Also, this bug is very similar to this comment:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55043#c15 .
It's the same issue as PR 55043, but harder to fix for std::vector because the
relevant constructors are not defined as defaulted.
> I use stdlibc++ shipped with this gcc.
It's libstdc++ not stdlibc++
>From gcc-bugs-return-522556-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 10:49:27 2016
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Subject: [Bug target/70711] GCC ARM big-endian ARMv8.1 code fails.
Date: Mon, 18 Apr 2016 10:49:00 -0000
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Ramana Radhakrishnan <ramana at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |6.0
--- Comment #2 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> ---
Update target milestone.
>From gcc-bugs-return-522557-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 10:55:51 2016
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Subject: [Bug tree-optimization/70686] GIMPLE if-conversion slows down code
Date: Mon, 18 Apr 2016 10:55:00 -0000
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--- Comment #4 from alekshs at hotmail dot com ---
I would be somewhat understanding in the context of -O2/-O3 (compiler guessing)
but not in the context of PGO (compiler understands the flow after a run - so
it should be able to understand that these IFs can't possible be an obstacle
for packed math... or that is my rationale anyway which may be totally
irrelevant with how these things should be done, cost/reward schemes of
implementing such changes, etc etc).
>From gcc-bugs-return-522558-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 10:57:43 2016
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Subject: [Bug target/70713] New: msp430 interrupt attribute prevents overriding weak symbols
Date: Mon, 18 Apr 2016 10:57:00 -0000
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Bug ID: 70713
Summary: msp430 interrupt attribute prevents overriding weak
symbols
Product: gcc
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Because the interrupt attribute in the msp430 port creates a .word directive
inside of the generated assembly, thus:
test.c:
__attribute__((weak, interrupt(USCI_A1_VECTOR)))
void TEST_WEAKNESS(void) {
UCA1TXBUF = 'e';
}
msp430-elf-gcc -mmcu=msp430fr6989 -S test.c
test.s:
.file "test.c"
.text
.balign 2
.weak TEST_WEAKNESS
.section __interrupt_vector_43,"ax",@progbits
.word TEST_WEAKNESS
.text
TEST_WEAKNESS:
; start of function
; attributes: interrupt
; framesize_regs: 0
; framesize_locals: 0
; framesize_outgoing: 0
; framesize: 0
; elim ap -> fp 2
; elim fp -> sp 0
; saved regs:(none)
; start of prologue
; end of prologue
MOV.W #101, &UCA1TXBUF
NOP
; start of epilogue
RETI
.size TEST_WEAKNESS, .-TEST_WEAKNESS
When we compile and attempt to link with a non-weak symbol, thus:
test2.c:
__attribute__((interrupt(USCI_A1_VECTOR)))
void TEST_WEAKNESS(void) {
UCA1TXBUF = 'E';
}
msp430-elf-gcc -mmcu=msp430fr6989 -S test2.c
test2.s:
.file "test2.c"
.text
.balign 2
.global TEST_WEAKNESS
.section __interrupt_vector_43,"ax",@progbits
.word TEST_WEAKNESS
.text
TEST_WEAKNESS:
; start of function
; attributes: interrupt
; framesize_regs: 0
; framesize_locals: 0
; framesize_outgoing: 0
; framesize: 0
; elim ap -> fp 2
; elim fp -> sp 0
; saved regs:(none)
; start of prologue
; end of prologue
MOV.W #69, &UCA1TXBUF
NOP
; start of epilogue
RETI
.size TEST_WEAKNESS, .-TEST_WEAKNESS
The error:
msp430-elf-gcc -mmcu=msp430fr6989 test.s test2.s -o test.elf
msp430-elf/bin/ld: test.elf section `__interrupt_vector_43' will not fit in
region `VECT43'
msp430-elf/bin/ld: region `VECT43' overflowed by 2 bytes
collect2: error: ld returned 1 exit status
I was able to get this to work by making the section lines part of a comdat
group, so that
.section __interrupt_vector_43,"ax",@progbits
becomes
.section __interrupt_vector_43,"axG",@progbits,TEST_WEAKNESS,comdat
in both cases. There seem to be no ill-effects from doing this (provided the
group name is based on the function name), but I lack the gcc experience to say
for sure, or to cause such code to be emitted.
>From gcc-bugs-return-522559-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 11:01:06 2016
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Subject: [Bug tree-optimization/48052] loop not vectorized if index is "unsigned int"
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amker at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
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--- Comment #20 from amker at gcc dot gnu.org ---
Fixed
>From gcc-bugs-return-522560-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 11:12:12 2016
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Subject: [Bug c++/70617] internal compiler error: Segmentation fault
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--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Jan Smets from comment #7)
> Should I open a different issue for that?
Yes.
>From gcc-bugs-return-522561-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 11:20:41 2016
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Subject: [Bug c++/70617] internal compiler error: Segmentation fault
Date: Mon, 18 Apr 2016 11:20:00 -0000
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--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Ok, so
page_table table = G.lookup;
uintptr_t high_bits = (uintptr_t) p & ~ (uintptr_t) 0xffffffff;
while (table->high_bits != high_bits)
table = table->next;
base = &table->table[0];
here we assume we never get a non-GC pointer passed to lookup_page_table_entry
(which is a valid assumption). What's p's value here?
>From gcc-bugs-return-522562-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 11:37:24 2016
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Subject: [Bug c++/70714] New: ICE: Segmentation fault
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struct UINT;
typedef struct { UINT TYPES } eType;
fn1(eType) {
gcc version 5.3.1 20160411 (GCC)
= gcc-5-branch @ 0efe1cc72d37ff1173b52cf6bc3f17bd0ccb59f3
target = x86_64-unknown-linux-gnu
compile with : -xc++ -c testcase.best -o /dev/null -m32 -w
>From gcc-bugs-return-522564-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 11:39:50 2016
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Subject: [Bug tree-optimization/70701] incomplete value numbering when memcpy-ing from array
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Apr 18 11:39:04 2016
New Revision: 235131
URL: https://gcc.gnu.org/viewcvs?rev=235131&root=gcc&view=rev
Log:
2016-04-18 Richard Biener <rguenther@suse.de>
PR tree-optimization/70701
* tree-ssa-sccvn.c (vn_reference_lookup_3): Resolve fully constant
references after translating through a memcpy.
* gcc.dg/tree-ssa/ssa-fre-53.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-53.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-sccvn.c
>From gcc-bugs-return-522563-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 11:39:49 2016
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Subject: [Bug tree-optimization/70701] incomplete value numbering when memcpy-ing from array
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |7.0
Resolution|--- |FIXED
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed on trunk.
>From gcc-bugs-return-522565-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 11:40:03 2016
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Subject: [Bug tree-optimization/70715] New: SCEV failed to prove no-overflow-ness information unsigned loop IV
Date: Mon, 18 Apr 2016 11:40:00 -0000
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Bug ID: 70715
Summary: SCEV failed to prove no-overflow-ness information
unsigned loop IV
Product: gcc
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Hi, below is a case in which SCEV failed to prove no-overflow-ness of converted
unsigned type loop IV. As a result, the address of pointer dereference isn't
recognized as SCEV.
/* { dg-do compile } */
/* { dg-options "-O3 -fdump-tree-ldist" } */
int
foo (char *p, unsigned n)
{
while(n--)
{
p[n]='A';
}
return 0;
}
/* Loop can be transformed into builtin memset since &p[n] is SCEV. */
/* { dg-final { scan-tree-dump "builtin_memset" "ldist" } } */
Actually, I added code supporting NE_EXPR as comparison code in loop exit
condition for PR68529. The only problem is: in function
number_of_iterations_exit, control_iv.base is expanded by
expand_simple_operations.
Given we have already encountered problems caused by this kind of expanding, we
may want to remove it in the future. For the moment, this can be easily fixed
by checking expanded expression in loop_exits_before_overflow.
I am testing a patch for this.
>From gcc-bugs-return-522566-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 11:43:19 2016
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Subject: [Bug libstdc++/70716] New: Doxygen comments on std containers need updating for C++11 allocators
Date: Mon, 18 Apr 2016 11:43:00 -0000
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Bug ID: 70716
Summary: Doxygen comments on std containers need updating for
C++11 allocators
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We have comments on copy constructors like:
* The newly-created %deque uses a copy of the allocation object used
* by @a __x.
and copy assignment:
* All the elements of @a x are copied, but unlike the copy constructor,
* the allocator object is not copied.
These need updating, as the behaviour depends on the allocator traits now.
Also, assignment operators and functions often say "Old data may be lost." I
think that's a confusing way to say that old elements are replaced, do we
really want to talk about data loss?
>From gcc-bugs-return-522567-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 11:50:36 2016
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Subject: [Bug libstdc++/70716] Doxygen comments on std containers need updating for C++11 allocators
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #0)
> Also, assignment operators and functions often say "Old data may be lost." I
> think that's a confusing way to say that old elements are replaced, do we
> really want to talk about data loss?
Especially "may be lost" ... that doesn't tell the user anything useful. The
elements are definitely destroyed. Whether that results in data loss or not
depends on the elements, but saying "data may be lost" is too vague to be
useful. Under what conditions is it lost? I think we should just remove those
sentences.
>From gcc-bugs-return-522568-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 11:54:59 2016
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Subject: [Bug c++/70617] internal compiler error: Segmentation fault
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--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #9)
> Ok, so
>
> page_table table = G.lookup;
> uintptr_t high_bits = (uintptr_t) p & ~ (uintptr_t) 0xffffffff;
> while (table->high_bits != high_bits)
> table = table->next;
> base = &table->table[0];
>
> here we assume we never get a non-GC pointer passed to
> lookup_page_table_entry
> (which is a valid assumption). What's p's value here?
I think that is valid assumption, so if we refer to non-GC memory from GC
memory without skip, that is where the bug is.
>From gcc-bugs-return-522569-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 12:09:25 2016
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Subject: [Bug c/69504] XMM register variable ICE with vector extensions
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--- Comment #5 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Better testcase:
typedef int U __attribute__ ((vector_size (16)));
int
foo (int i)
{
register U u asm ("xmm0");
return u[i];
}
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Subject: [Bug target/70711] GCC ARM big-endian ARMv8.1 code fails.
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--- Comment #3 from mwahab at gcc dot gnu.org ---
Author: mwahab
Date: Mon Apr 18 12:11:03 2016
New Revision: 235132
URL: https://gcc.gnu.org/viewcvs?rev=235132&root=gcc&view=rev
Log:
PR target/70711
* config/arm/bpabi.h (BE8_LINK_SPEC): Add entries for armv8+crc,
armv8.1-a and armv8.1-a+crc.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/arm/bpabi.h
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Subject: [Bug bootstrap/70706] [7 Regression] r235082 caused bootstrap failure
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Jan Hubicka <hubicka at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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CC| |hubicka at gcc dot gnu.org
Resolution|--- |FIXED
--- Comment #5 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug c/70297] [5 Regression] GCC Segfaults when using -g3
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--- Comment #12 from Richard Biener <rguenth at gcc dot gnu.org> ---
On the branch also needs
2015-11-11 Jason Merrill <jason@redhat.com>
* decl.c (duplicate_decls): When combining typedefs, remove the
new type from the variants list.
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--- Comment #13 from Richard Biener <rguenth at gcc dot gnu.org> ---
r207169 that is.
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Subject: [Bug target/70711] GCC ARM big-endian ARMv8.1 code fails.
Date: Mon, 18 Apr 2016 12:18:00 -0000
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--- Comment #4 from mwahab at gcc dot gnu.org ---
Author: mwahab
Date: Mon Apr 18 12:18:10 2016
New Revision: 235133
URL: https://gcc.gnu.org/viewcvs?rev=235133&root=gcc&view=rev
Log:
PR target/70711
* config/arm/bpabi.h (BE8_LINK_SPEC): Add entries for armv8+crc,
armv8.1-a and armv8.1-a+crc.
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/config/arm/bpabi.h
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Subject: [Bug c++/70617] internal compiler error: Segmentation fault
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #12 from Richard Biener <rguenth at gcc dot gnu.org> ---
Verified by backporting the fix.
*** This bug has been marked as a duplicate of bug 70297 ***
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Subject: [Bug c++/70617] internal compiler error: Segmentation fault
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--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
(gdb) p p
$2 = (const void *) 0x1f0
is the TREE_TYPE of a CEIL_MOD_EXPR. That looks like a bogus pointer to me.
That CEIL_MOD_EXPR is at 0x7ffff5bd0b48. It's first allocated as TYPE_DECL
for me, then as lang-specific via cxx_make_type for a UNION_TYPE
(0x7ffff5bd2150).
We end up coming here via walking CP binding levels
TYPE_NAME (TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (TYPE_CANONICAL (TREE_TYPE
(FUNCTION_DECL))))))
and then that TYPE_NAME is CEIL_MOD_EXPR.
bool <Tab14> (struct tVfpPacketDesc *, unsigned char, const struct
VFP_INGRESS_PORT_RECORD *, unsigned int, struct t_ing_zeroed *, unsigned int *,
unsigned int *, unsigned int *, const struct INTERFACE_DEST_INFO * *, union
IP_ADDRESS_AND_L2TP *, struct t_ing_p1_flags *, union IPV6_ADDRESS *, struct
t_ing_tunnel_info *, struct INGRESS_VRF_RECORD *, unsigned int, const struct
INGRESS_ILM_RECORD *, unsigned char, struct INTERFACE_DEST_INFO *, unsigned
int, short unsigned int, short unsigned int, struct DPISUB_VFP_INFO *, const
struct VFP_INGRESS_SAP_INFO *, struct t_ing_qos *, const struct DEST_INDICES *,
struct t_ing_special_ucast_l3_info *)
#5 0x000000000090923b in gt_ggc_mx_lang_tree_node (x_p=0x7ffff4137d20)
at ./gt-cp-tree.h:543
543 gt_ggc_m_9tree_node
((*x).generic.type_non_common.with_lang_specific.common.common.typed.type);
(gdb) p debug_generic_expr ((tree)x)
struct tVfpPacketDesc *
$43 = void
(gdb) down
#4 0x00000000009093c9 in gt_ggc_mx_lang_tree_node (x_p=0x7ffff40f9348)
at ./gt-cp-tree.h:567
567 gt_ggc_m_9tree_node
((*x).generic.type_non_common.with_lang_specific.common.name);
(gdb) p debug_generic_expr ((tree)x)
struct %[cl]
$44 = void
looking at how TYPE_NAME of that record evolves. I suspect it should have
remained the TYPE_DECL and not released to be re-allocated as lang-specific
data.
Ok, so I think this is a dup of PR70297.
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Subject: [Bug c/70297] [5 Regression] GCC Segfaults when using -g3
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jan.smets@alcatel-lucent.co
| |m
--- Comment #15 from Richard Biener <rguenth at gcc dot gnu.org> ---
*** Bug 70617 has been marked as a duplicate of this bug. ***
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Subject: [Bug c/70297] [5 Regression] GCC Segfaults when using -g3
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--- Comment #14 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #13)
> r207169 that is.
r230202 I mean.
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Subject: [Bug target/70711] GCC ARM big-endian ARMv8.1 code fails.
Date: Mon, 18 Apr 2016 12:55:00 -0000
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mwahab at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from mwahab at gcc dot gnu.org ---
Fix committed to trunk and to gcc-6.
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Subject: [Bug bootstrap/70704] [6 Regressions] AIX bootstrap comparison failure
Date: Mon, 18 Apr 2016 12:55:00 -0000
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David Edelsohn <dje at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |NEW
--- Comment #7 from David Edelsohn <dje at gcc dot gnu.org> ---
I don't know that a sort is unstable or a particular sort. It is a hunch based
on similar failures in the past -- some output in a different order.
Why would stage2 and stage3 be built with different options, especially if
their object files are compared?
I added -frandom-seed=0 to the options, but I still see differences in
addresses, which makes comparison a little difficult.
sbitmap.c.001.tu differ, with the @XXXX addresses. The first difference where
one dump file contains information not present in another dump file is
sbitmap.c.003t.original. Stage2 contains three lines of
;; Function constexpr bool std::_ImplicitlyConvertiblePair() [with _T1 =
mem_usage*; _T2 = mem_usage*; _U1 = mem_usage*; _U2 = mem_usage*] (null)
;; enabled by -tree-original
return <retval> = 1;
while Stage3 contains only one line. The rest of the file contains identical
statements but different labels.
sbitmap.c.006.omplower begin to show differences in funcdef_no, cgraph_uid and
symbol_order.
>From gcc-bugs-return-522581-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 13:02:26 2016
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Subject: [Bug target/69148] [5 Regression] ICE (floating point exception) on s390x-linux-gnu
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Dominik Vogt <vogt at linux dot vnet.ibm.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |vogt at linux dot vnet.ibm.com
--- Comment #7 from Dominik Vogt <vogt at linux dot vnet.ibm.com> ---
(Need to backport this to 5.3 for Ubuntu.)
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Subject: [Bug tree-optimization/43434] Missed vectorization: "not vectorized: data ref analysis": pointer incremented by a parameter
Date: Mon, 18 Apr 2016 13:10:00 -0000
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--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Apr 18 13:09:53 2016
New Revision: 235147
URL: https://gcc.gnu.org/viewcvs?rev=235147&root=gcc&view=rev
Log:
2016-04-18 Richard Biener <rguenther@suse.de>
PR tree-optimization/43434
* tree-ssa-structalias.c (struct vls_data): New.
(visit_loadstore): Handle all pointer-based accesses.
(compute_dependence_clique): Compute a bitmap of restrict tags
assigned bases and pass it to visit_loadstore.
* gcc.dg/vect/pr43434.c: New testcase.
* c-c++-common/goacc/kernels-alias-3.c: Adjust.
* c-c++-common/goacc/kernels-alias-4.c: Likewise.
* c-c++-common/goacc/kernels-alias-5.c: Likewise.
* c-c++-common/goacc/kernels-alias-6.c: Likewise.
* c-c++-common/goacc/kernels-alias-7.c: Likewise.
* c-c++-common/goacc/kernels-alias-8.c: Likewise.
* gcc.dg/gomp/pr68640.c: Likewise.
* gfortran.dg/goacc/kernels-alias-3.f95: Likewise.
* gfortran.dg/goacc/kernels-alias-4.f95: Likewise.
Added:
trunk/gcc/testsuite/gcc.dg/vect/pr43434.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/c-c++-common/goacc/kernels-alias-3.c
trunk/gcc/testsuite/c-c++-common/goacc/kernels-alias-4.c
trunk/gcc/testsuite/c-c++-common/goacc/kernels-alias-5.c
trunk/gcc/testsuite/c-c++-common/goacc/kernels-alias-6.c
trunk/gcc/testsuite/c-c++-common/goacc/kernels-alias-7.c
trunk/gcc/testsuite/c-c++-common/goacc/kernels-alias-8.c
trunk/gcc/testsuite/gcc.dg/gomp/pr68640.c
trunk/gcc/testsuite/gfortran.dg/goacc/kernels-alias-3.f95
trunk/gcc/testsuite/gfortran.dg/goacc/kernels-alias-4.f95
trunk/gcc/tree-ssa-structalias.c
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Subject: [Bug tree-optimization/43434] Missed vectorization: "not vectorized: data ref analysis": pointer incremented by a parameter
Date: Mon, 18 Apr 2016 13:11:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |7.0
--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed on trunk.
>From gcc-bugs-return-522583-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 13:11:13 2016
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From: "safinaskar at mail dot ru" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/70472] is_copy_constructible<vector<unique_ptr<int>>>::value is true
Date: Mon, 18 Apr 2016 13:11:00 -0000
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--- Comment #3 from Askar Safin <safinaskar at mail dot ru> ---
(In reply to Jonathan Wakely from comment #2)
> It's not required, and it would be impossible to require it in general. The
> problem is that std::vector does have a copy constructor, so the trait value
> is true, but instantiating that constructor produces an error when the
> value_type is not copyable.
std::is_copy_constructible<std::experimental::optional<...>> is correct. Look
at the implementation. There are _Enable_special_members and _Enable_copy_move
in <bits/enable_special_members.h>. Then there is _Optional_base in
<experimental/optional>. And then there is
template<typename _Tp>
class optional
: private _Optional_base<_Tp>,
private _Enable_copy_move<
// Copy constructor.
is_copy_constructible<_Tp>::value,
...
>
in <experimental/optional>. Also, link I post ( http://paste.debian.net/422907/
) give simplified example how to do this.
> Types used with std::vector must be nothrow-move-constructible or
> copy-constructible. If your type has a throwing move-ctor then vector will
> try to copy it, which causes an instantiation error.
If I remove copy-ctor and copy-assignment using "= delete" in that
paste.debian.org link and leave noexcept commented, then all will build
successfully. So, it seems for me vector uses the following algorithm:
if (has_noexcept_move_ctor)
{
use_noexcept_move_ctor ();
}
else if (has_copy_ctor) // determined using trait. So if copy ctor is defined,
it will be used, even if it doesn't compile. If copy ctor is deleted using "=
delete", it will not be used
{
use_copy_ctor ();
}
else
{
use_move_ctor ();
}
>From gcc-bugs-return-522586-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 13:12:57 2016
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Subject: [Bug tree-optimization/37021] Fortran Complex reduction / multiplication not vectorized
Date: Mon, 18 Apr 2016 13:12:00 -0000
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Bug 37021 depends on bug 43434, which changed state.
Bug 43434 Summary: Missed vectorization: "not vectorized: data ref analysis": pointer incremented by a parameter
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=43434
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
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Subject: [Bug tree-optimization/53947] [meta-bug] vectorizer missed-optimizations
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Bug 53947 depends on bug 43434, which changed state.
Bug 43434 Summary: Missed vectorization: "not vectorized: data ref analysis": pointer incremented by a parameter
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=43434
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----------------------------------------------------------------------------
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Subject: [Bug tree-optimization/43434] Missed vectorization: "not vectorized: data ref analysis": pointer incremented by a parameter
Date: Mon, 18 Apr 2016 13:12:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
.
>From gcc-bugs-return-522588-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 13:20:50 2016
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From: "kobalicek.petr at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70708] Suboptimal code generated when using _mm_set_sd (X64)
Date: Mon, 18 Apr 2016 13:20:00 -0000
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--- Comment #3 from Petr <kobalicek.petr at gmail dot com> ---
Is there any workaround guys?
I was looking for some built-in that would allow me just cast `double` to
`__m128d` without going through `_mm_set_sd()`, but leaving the high part
undefined.
>From gcc-bugs-return-522589-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 13:29:33 2016
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Subject: [Bug target/70708] Suboptimal code generated when using _mm_set_sd (X64)
Date: Mon, 18 Apr 2016 13:29:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
If there were not PR61810 then
double MyMinV2(double a, double b) {
double undef = undef;
__m128d x = (__m128d) { a, undef };
__m128d y = (__m128d) { b, undef };
return _mm_cvtsd_f64(_mm_min_sd(x, y));
}
would work. Currently it does
MyMinV2:
.LFB525:
.cfi_startproc
movhpd .LC0(%rip), %xmm0
movhpd .LC0(%rip), %xmm1
minsd %xmm1, %xmm0
so as if you'd use 0.0 for undef. Might be still "better" than going
through the stack.
>From gcc-bugs-return-522590-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 13:30:48 2016
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Subject: [Bug libstdc++/70472] is_copy_constructible<vector<unique_ptr<int>>>::value is true
Date: Mon, 18 Apr 2016 13:30:00 -0000
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Yes, I know how to do it, that doesn't mean we can do so easily in existing
types.
>From gcc-bugs-return-522591-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 13:32:03 2016
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Subject: [Bug target/70708] Suboptimal code generated when using _mm_set_sd (X64)
Date: Mon, 18 Apr 2016 13:32:00 -0000
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--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
double MyMinV2(double a, double b) {
double undef = undef;
__m128d x;
__m128d y;
asm ("" : "=x" (x) : "0" (a));
asm ("" : "=x" (y) : "0" (b));
return _mm_cvtsd_f64(_mm_min_sd(x, y));
}
works though.
>From gcc-bugs-return-522592-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 13:43:17 2016
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Subject: [Bug c++/70685] [6/7 Regression] ICE: Segmentation fault
Date: Mon, 18 Apr 2016 13:43:00 -0000
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--- Comment #7 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
I'm such a doofus :(
>From gcc-bugs-return-522593-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 13:50:29 2016
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Subject: [Bug target/70708] Suboptimal code generated when using _mm_set_sd (X64)
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--- Comment #6 from Marc Glisse <glisse at gcc dot gnu.org> ---
(In reply to Petr from comment #3)
> Is there any workaround guys?
>
> I was looking for some built-in that would allow me just cast `double` to
> `__m128d` without going through `_mm_set_sd()`, but leaving the high part
> undefined.
See PR68211.
>From gcc-bugs-return-522594-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 14:19:00 2016
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Subject: [Bug c++/70709] [4.9/5/6/7 Regression] gcc hangs on valid C++ code on x86_64-linux-gnu
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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CC| |jakub at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I bet this started with r187042, at least r187035 compiles this instantly, and
r187042 hangs somewhere during finish_struct in the FE.
>From gcc-bugs-return-522595-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 14:21:27 2016
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Subject: [Bug c++/70616] [4.9/5/6/7 Regression] ICE on valid code on x86_64-linux-gnu in build_base_path, at cp/class.c:303
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Nathan Sidwell <nathan at gcc dot gnu.org> changed:
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--- Comment #4 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
12.4 seems to cover this case, and indicate that with an unqualified name, we
call the complete object destructor -- not the base destructor. Thus
Patrick's test case is behaving as expected.
The qualified name will call that specific base's (in-charge, complete)
destructor. And I think will not work with the current ABI in the case of
virtual bases. The virtual bases could be placed differently in the complete
object to how a particlar base would place them if it were the complete object
(that's what the VTT param is all about).
The std does not seem to indicate such calls are undefined though.
>From gcc-bugs-return-522596-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 14:33:29 2016
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Subject: [Bug c++/70616] [4.9/5/6/7 Regression] ICE on valid code on x86_64-linux-gnu in build_base_path, at cp/class.c:303
Date: Mon, 18 Apr 2016 14:33:00 -0000
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Nathan Sidwell <nathan at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Assignee|unassigned at gcc dot gnu.org |nathan at gcc dot gnu.org
>From gcc-bugs-return-522597-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 14:43:41 2016
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Subject: [Bug c++/70690] [6/7 Regression] r235002 miscompiles tcmalloc
Date: Mon, 18 Apr 2016 14:43:00 -0000
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--- Comment #4 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
markus@x4 Release % cat static_vars.ii
class CentralFreeList {
public:
CentralFreeList() {}
};
template <int size>
class CentralFreeListPaddedTo : public CentralFreeList {
private:
char pad_[64 - size];
};
class CentralFreeListPadded
: public CentralFreeListPaddedTo<sizeof(CentralFreeList) % 64> {};
class Static {
public:
static CentralFreeListPadded central_cache_[50];
};
CentralFreeListPadded Static::central_cache_[50];
>From gcc-bugs-return-522598-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 14:54:41 2016
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Subject: [Bug tree-optimization/58483] missing optimization opportunity for const std::vector compared to std::array
Date: Mon, 18 Apr 2016 14:54:00 -0000
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--- Comment #9 from Marc Glisse <glisse at gcc dot gnu.org> ---
__builtin_memcpy (_30, &._82, 12);
_31 = MEM[(const int &)_30];
looks like something we should be able to optimize, and there is indeed code in
vn_reference_lookup_3 to that effect, but the code doesn't look that nice until
very late in the optimization pipeline. At fre1, we haven't inlined the
constructor of vector yet. And we only unroll the loop after all the pre/fre
passes are done. The most relevant remaining pass is dom3, but it doesn't look
like it handles this. If I add another FRE pass next to dom3, we are left with
_30 = operator new (12);
__builtin_memcpy (_30, &._41, 12);
operator delete (_30);
D.15905 ={v} {CLOBBER};
return 160;
Removing memcpy before operator delete seems to be a work in progress
https://gcc.gnu.org/ml/gcc-patches/2016-04/msg00780.html
And then we would finally get to the part about removing new/delete pairs.
Adding that late FRE pass seems unlikely to happen (?), so we probably need to
find some other way.
We could notice that iterating on the copy _30 is the same as iterating on the
original ._82, but that seems much harder than adding another pass after loop
unrolling...
I was a bit surprised to notice that when we see
__builtin_memcpy(b,a,42);
c=b[0];
and we do notice that this is equivalent to "c=a[0]", we only do the rewriting
if we can get to a constant value for c. I was expecting an unconditional
rewrite. But maybe that would somehow end up pessimizing the code in other
cases.
>From gcc-bugs-return-522599-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 15:03:50 2016
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Subject: [Bug sanitizer/70712] False positive from AddressSanitizer with use of 'alignas'
Date: Mon, 18 Apr 2016 15:03:00 -0000
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--- Comment #1 from Kostya Serebryany <kcc at gcc dot gnu.org> ---
Does not happen with clang:
clang++ -fsanitize=address alignas.cc -std=c++11 && ./a.out
So this is gcc-specific.
>From gcc-bugs-return-522600-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 15:22:40 2016
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Subject: [Bug c/70297] [5 Regression] GCC Segfaults when using -g3
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--- Comment #16 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Mon Apr 18 15:21:52 2016
New Revision: 235150
URL: https://gcc.gnu.org/viewcvs?rev=235150&root=gcc&view=rev
Log:
PR c/70297
* c-decl.c (merge_decls): Also set TYPE_ALIGN and TYPE_USER_ALIGN.
* decl.c (duplicate_decls): Also set TYPE_ALIGN and TYPE_USER_ALIGN.
* c-c++-common/pr70297.c: New test.
* g++.dg/cpp0x/typedef-redecl.C: New test.
* gcc.dg/typedef-redecl2.c: New test.
Added:
branches/gcc-5-branch/gcc/testsuite/c-c++-common/pr70297.c
branches/gcc-5-branch/gcc/testsuite/g++.dg/cpp0x/typedef-redecl.C
branches/gcc-5-branch/gcc/testsuite/gcc.dg/typedef-redecl2.c
Modified:
branches/gcc-5-branch/gcc/c/ChangeLog
branches/gcc-5-branch/gcc/c/c-decl.c
branches/gcc-5-branch/gcc/cp/ChangeLog
branches/gcc-5-branch/gcc/cp/decl.c
branches/gcc-5-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-522601-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 15:24:39 2016
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Subject: [Bug c/70297] [5 Regression] GCC Segfaults when using -g3
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #17 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-522603-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 15:34:54 2016
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Subject: [Bug middle-end/70689] [6/7 Regression] ICE on valid code at -O1 in 32-bit mode on x86_64-linux-gnu in curr_insn_transform, at lra-constraints.c:3564
Date: Mon, 18 Apr 2016 15:34:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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CC| |jakub at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Most likely that just uncovered a latent RA or machine description RA related
bug.
The
(define_insn "*float<SWI48x:mode><MODEF:mode>2_i387"
[(set (match_operand:MODEF 0 "register_operand" "=f")
(float:MODEF (match_operand:SWI48x 1 "nonimmediate_operand" "m")))]
insn allows nonimmediate_operand - thus both MEM and REG before reload, and has
just "m" constraint, so we should force that into memory.
In *.ira that is using REG, which has REG_EQUIV of (plus (frame) (const_int
-4)).
Vlad, could you please have a look at this?
>From gcc-bugs-return-522602-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 15:34:17 2016
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Subject: [Bug c/70400] GCC compiles a return statement with an expression in a void function (illegal under C90 6.6.6.4) with -stdÉ0 -pedantic
Date: Mon, 18 Apr 2016 15:34:00 -0000
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----------------------------------------------------------------------------
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--- Comment #6 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Closing as there's nothing more to do.
>From gcc-bugs-return-522604-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 15:35:09 2016
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Subject: [Bug target/70708] Suboptimal code generated when using _mm_set_sd (X64)
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70708
--- Comment #7 from H.J. Lu <hjl.tools at gmail dot com> ---
Created attachment 38303
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38303&action=edit
A patch for _mm_set_sd
We should use "movq" instead of "movsd" for _mm_set_sd.
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Subject: [Bug target/70708] Suboptimal code generated when using _mm_set_sd (X64)
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H.J. Lu <hjl.tools at gmail dot com> changed:
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----------------------------------------------------------------------------
CC| |glisse at gcc dot gnu.org
--- Comment #8 from H.J. Lu <hjl.tools at gmail dot com> ---
*** Bug 68211 has been marked as a duplicate of this bug. ***
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Subject: [Bug target/68211] Free __m128d subreg of double
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H.J. Lu <hjl.tools at gmail dot com> changed:
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--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
When the patch for PR 70708, I got
vmovq %xmm0, %xmm0
vsqrtsd {ru-sae}, %xmm0, %xmm0, %xmm0
ret
*** This bug has been marked as a duplicate of bug 70708 ***
>From gcc-bugs-return-522607-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 15:44:33 2016
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Subject: [Bug c/70371] Number added worng
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
When testing on x86_64 with 4.9 I see the output is 2468.
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Subject: [Bug c/70477] -Wtautological-compare too aggressive?
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--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
...because neither LHS nor RHS have any location here.
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Subject: [Bug c/70477] -Wtautological-compare too aggressive?
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--- Comment #3 from ktkachov at gcc dot gnu.org ---
(In reply to Marek Polacek from comment #2)
> ...because neither LHS nor RHS have any location here.
Hi Marek,
does that mean you can reproduce?
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From: "glisse at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/68211] Free __m128d subreg of double
Date: Mon, 18 Apr 2016 16:41:00 -0000
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--- Comment #2 from Marc Glisse <glisse at gcc dot gnu.org> ---
(In reply to H.J. Lu from comment #1)
> When the patch for PR 70708, I got
>
> vmovq %xmm0, %xmm0
> vsqrtsd {ru-sae}, %xmm0, %xmm0, %xmm0
> ret
Note that the goal of both PRs is to get rid of that movq (I agree that movq
looks like an improvement compared to what we have currently, thanks).
>From gcc-bugs-return-522611-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 17:01:23 2016
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Subject: [Bug target/68211] Free __m128d subreg of double
Date: Mon, 18 Apr 2016 17:01:00 -0000
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--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Marc Glisse from comment #2)
> (In reply to H.J. Lu from comment #1)
> > When the patch for PR 70708, I got
> >
> > vmovq %xmm0, %xmm0
> > vsqrtsd {ru-sae}, %xmm0, %xmm0, %xmm0
> > ret
>
> Note that the goal of both PRs is to get rid of that movq (I agree that movq
> looks like an improvement compared to what we have currently, thanks).
It depends on how the upper bits should be treated.
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Subject: [Bug c/70477] -Wtautological-compare too aggressive?
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Last reconfirmed| |2016-04-18
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--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Yep, so I'm going to confirm this, though I can't readily see any nice
solution.
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |7.0
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Fixed by r235155
>From gcc-bugs-return-522613-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 17:18:28 2016
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Subject: [Bug target/68211] Free __m128d subreg of double
Date: Mon, 18 Apr 2016 17:18:00 -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 #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
If the upper bits of the register can contain arbitrary garbage, then keeping
it there might result in e.g. floating point exceptions being raised (it could
be even a sNAN). Of course a different thing is if we can prove what is in
those upper bits and be sure it doesn't do any harm, or if the operations on it
later on are masked.
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Subject: [Bug c++/70690] [6/7 Regression] r235002 miscompiles tcmalloc
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Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
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Ever confirmed|0 |1
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Subject: [Bug libstdc++/41759] [C++0x] <random> static_assert phrasing should be positive
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--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Mon Apr 18 18:03:50 2016
New Revision: 235160
URL: https://gcc.gnu.org/viewcvs?rev=235160&root=gcc&view=rev
Log:
PR libstdc++/41759 reword static assertions in <random>
PR libstdc++/41759
* include/bits/random.h: Reword static assertion messages to state
positive conditions.
* include/bits/random.tcc: Likewise.
* include/bits/uniform_int_dist.h: Likewise.
* testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error
patterns.
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/bits/random.h
trunk/libstdc++-v3/include/bits/random.tcc
trunk/libstdc++-v3/include/bits/uniform_int_dist.h
trunk/libstdc++-v3/testsuite/26_numerics/random/pr60037-neg.cc
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Subject: [Bug libstdc++/41759] [C++0x] <random> static_assert phrasing should be positive
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Fixed for gcc7
>From gcc-bugs-return-522618-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 18:25:23 2016
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Subject: [Bug c++/70690] [6/7 Regression] r235002 miscompiles tcmalloc
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70690
--- Comment #5 from Jason Merrill <jason at gcc dot gnu.org> ---
GCC bug: we're clearing 'cache' during its dynamic initialization even though
default-initialization should have no effect.
struct A {
A() {}
};
struct APadded : public A {
char pad[63];
};
int f();
int i = f();
APadded cache[50];
APadded *p = cache;
int f()
{
cache[0].pad[0] = 42;
return 1;
}
int main()
{
if (cache[0].pad[0] != 42)
__builtin_abort();
}
>From gcc-bugs-return-522620-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 19:00:46 2016
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Subject: [Bug c++/70690] [6/7 Regression] r235002 miscompiles tcmalloc
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--- Comment #6 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Mon Apr 18 19:00:00 2016
New Revision: 235165
URL: https://gcc.gnu.org/viewcvs?rev=235165&root=gcc&view=rev
Log:
PR c++/70690
PR c++/70528
* class.c (type_maybe_constexpr_default_constructor): New.
(type_has_constexpr_default_constructor): Revert.
Added:
trunk/gcc/testsuite/g++.dg/init/array41.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/class.c
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Subject: [Bug c++/70528] [5 Regression] bogus error: constructor required before non-static data member
Date: Mon, 18 Apr 2016 19:00:00 -0000
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--- Comment #13 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Mon Apr 18 19:00:00 2016
New Revision: 235165
URL: https://gcc.gnu.org/viewcvs?rev=235165&root=gcc&view=rev
Log:
PR c++/70690
PR c++/70528
* class.c (type_maybe_constexpr_default_constructor): New.
(type_has_constexpr_default_constructor): Revert.
Added:
trunk/gcc/testsuite/g++.dg/init/array41.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/class.c
>From gcc-bugs-return-522621-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 19:21:29 2016
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From: "Casey at Carter dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/60799] access checking within injected friend functions does not happen in the context of the enclosing class
Date: Mon, 18 Apr 2016 19:21:00 -0000
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--- Comment #2 from Casey Carter <Casey at Carter dot net> ---
[basic.lookup.unqual]/9 says that name *lookup* inside friend functions defined
inline works as it does in member functions, but that doesn’t necessarily imply
that the friend function should have the same *access* as member functions
would to the names so found (excepting, of course, names of the class being
defined).
Given [class.friend]/2:
Declaring a class to be a friend implies that the names of private and
protected members from the class granting friendship can be accessed in the
base-specifiers and member declarations of the befriended class.
and [class.mem]/1:
… Except when used to declare friends (11.3), to declare an unnamed bit-field
(9.6), or to introduce the name of a member of a base class into a derived
class (7.3.3), or when the declaration is an empty-declaration,
member-declarations declare members of the class, and each such
member-declaration shall declare at least one member name of the class. …
It's "clear" that a friend declaration is a member-declaration which – oddly
enough – does not declare a member. So the critical question is whether the
wording “and member declarations†in [class.friend]/2 means “declarations that
are syntactically member-declarations†or “declarations of members.†I'm
inclined to the second interpretation, which would imply the behavior described
in this bug report is what the standard intends.
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Subject: [Bug target/70708] Suboptimal code generated when using _mm_set_sd (X64)
Date: Mon, 18 Apr 2016 19:41:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70708
--- Comment #9 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> ---
Author: hjl
Date: Mon Apr 18 19:40:30 2016
New Revision: 235169
URL: https://gcc.gnu.org/viewcvs?rev=235169&root=gcc&view=rev
Log:
Optimize load double into xmm with zero_extend
"movq" should used to load double into xmm register with zero_extend:
(set (reg:V2DF 90)
(vec_concat:V2DF (reg/v:DF 88 [ d ])
(const_double:DF 0.0 [0x0.0p+0])))
Unlike "movsd", which only works with load from memory, "movq" works
with both memory and xmm register.
gcc/
PR target/70708
* config/i386/sse.md (sse2_loadlpd): Accept load from "xm" and
replace %vmovsd with "%vmovq".
(vec_concatv2df): Likewise.
gcc/testsuite/
PR target/70708
* gcc.target/i386/pr70708.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr70708.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/sse.md
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug target/70708] Suboptimal code generated when using _mm_set_sd (X64)
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |7.0
--- Comment #10 from H.J. Lu <hjl.tools at gmail dot com> ---
_mm_set_sd is fixed for GCC 7.
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Subject: [Bug c++/70528] [5 Regression] bogus error: constructor required before non-static data member
Date: Mon, 18 Apr 2016 19:44:00 -0000
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--- Comment #14 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Mon Apr 18 19:43:26 2016
New Revision: 235171
URL: https://gcc.gnu.org/viewcvs?rev=235171&root=gcc&view=rev
Log:
PR c++/70690
PR c++/70528
* class.c (type_maybe_constexpr_default_constructor): New.
(type_has_constexpr_default_constructor): Revert.
Added:
branches/gcc-6-branch/gcc/testsuite/g++.dg/init/array41.C
Modified:
branches/gcc-6-branch/gcc/cp/ChangeLog
branches/gcc-6-branch/gcc/cp/class.c
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Subject: [Bug c++/70690] [6/7 Regression] r235002 miscompiles tcmalloc
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--- Comment #7 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Mon Apr 18 19:43:26 2016
New Revision: 235171
URL: https://gcc.gnu.org/viewcvs?rev=235171&root=gcc&view=rev
Log:
PR c++/70690
PR c++/70528
* class.c (type_maybe_constexpr_default_constructor): New.
(type_has_constexpr_default_constructor): Revert.
Added:
branches/gcc-6-branch/gcc/testsuite/g++.dg/init/array41.C
Modified:
branches/gcc-6-branch/gcc/cp/ChangeLog
branches/gcc-6-branch/gcc/cp/class.c
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Subject: [Bug c++/70505] [4.9/5/6/7 Regression] Constexpr failure when template type specified
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--- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Mon Apr 18 19:43:19 2016
New Revision: 235170
URL: https://gcc.gnu.org/viewcvs?rev=235170&root=gcc&view=rev
Log:
PR c++/70505
* pt.c (tsubst_baselink): Give the new TEMPLATE_ID_EXPR
unknown_type_node, too.
Added:
branches/gcc-6-branch/gcc/testsuite/g++.dg/cpp0x/constexpr-template10.C
Modified:
branches/gcc-6-branch/gcc/cp/ChangeLog
branches/gcc-6-branch/gcc/cp/pt.c
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Subject: [Bug c++/60799] access checking within injected friend functions does not happen in the context of the enclosing class
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--- Comment #3 from Casey Carter <Casey at Carter dot net> ---
> I'm inclined to the second interpretation, which would imply the behavior described in this bug report is what the standard intends.
This is me stumbling over my words attempting to say "I think this is NOT a
bug."
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Subject: [Bug target/70708] Suboptimal code generated when using _mm_set_sd (X64)
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Marc Glisse <glisse at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |NEW
Resolution|FIXED |---
--- Comment #11 from Marc Glisse <glisse at gcc dot gnu.org> ---
As I told you in the other PR, movq is *NOT* what the PRs are asking for, it
was just a side remark. If you consider clang's code completely broken and
gcc's code optimal, then the PR is invalid. Otherwise, it needs to stay open.
Since for MyMinV1 we generate no move at all, then that code should also be
valid for MyMinV2 (no issue with sNaN in the upper part or whatever).
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Subject: [Bug target/70708] Suboptimal code generated when using _mm_set_sd (X64)
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--- Comment #12 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Marc Glisse from comment #11)
> As I told you in the other PR, movq is *NOT* what the PRs are asking for, it
See the subject of this PR.
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Bug ID: 70717
Summary: -fsanitize=object-size as warning
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: sanitizer
Assignee: unassigned at gcc dot gnu.org
Reporter: aleks at physik dot tu-berlin.de
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
Target Milestone: ---
a new warning could detect problems earlier than "-fsanitize=object-size".
The following code is wrong, should be detected by "-fsanitize=object-size",
but it could be detected already at compile-time, especially for
memset/memcpy/memcmp .
char a[8], b[16]; memcpy(a,b,sizeof(b)); // write out of bounds, a[8..15] does
not exist
Thanks for reading
>From gcc-bugs-return-522631-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 20:04:56 2016
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Subject: [Bug target/70708] Suboptimal code generated when using _mm_set_sd (X64)
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #13 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Marc Glisse from comment #11)
> Since for MyMinV1 we generate no move at all, then that code should also be
> valid for MyMinV2 (no issue with sNaN in the upper part or whatever).
Since _mm_set_sd clears upper bits, return from MyMinV2 should have upper
bits cleared. If not, it is a bug.
>From gcc-bugs-return-522632-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 20:06:25 2016
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From: "glisse at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70708] Suboptimal code generated when using _mm_set_sd (X64)
Date: Mon, 18 Apr 2016 20:06:00 -0000
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--- Comment #14 from Marc Glisse <glisse at gcc dot gnu.org> ---
(In reply to H.J. Lu from comment #12)
> (In reply to Marc Glisse from comment #11)
> > As I told you in the other PR, movq is *NOT* what the PRs are asking for, it
>
> See the subject of this PR.
1) I know for certain this is not what PR68211 (a bug you closed as a
duplicate) was asking for, since I filed that one.
2) If you read the summary, the optimal code Petr is asking for here is no move
at all, i.e. the same clang is generating. movq is still suboptimal here.
While I really appreciate the quick improvement on using movq, I don't
understand why you are so set on closing these PRs... Intel's intrinsics and
their gcc implementation make it hard to write scalar code without overhead,
that seems a relevant concern to me.
>From gcc-bugs-return-522633-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 20:12:44 2016
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Subject: [Bug target/70708] Suboptimal code generated when using _mm_set_sd (X64)
Date: Mon, 18 Apr 2016 20:12:00 -0000
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--- Comment #15 from Marc Glisse <glisse at gcc dot gnu.org> ---
(In reply to H.J. Lu from comment #13)
> (In reply to Marc Glisse from comment #11)
> > Since for MyMinV1 we generate no move at all, then that code should also be
> > valid for MyMinV2 (no issue with sNaN in the upper part or whatever).
>
> Since _mm_set_sd clears upper bits, return from MyMinV2 should have upper
> bits cleared. If not, it is a bug.
MyMinV2 returns a double, not a __m128d. I tried to read what the ABI says
about the unused upper part of SSE registers when passing/returning a double
and couldn't find any information. Could you explain in more details what makes
MyMinV2 so different from MyMinV1? I appear to be missing some crucial piece of
information here :-(
>From gcc-bugs-return-522634-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 20:14:31 2016
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Subject: [Bug bootstrap/70704] [6 Regression] AIX bootstrap comparison failure
Date: Mon, 18 Apr 2016 20:14:00 -0000
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--- Comment #8 from David Edelsohn <dje at gcc dot gnu.org> ---
Development branch prior to debug-early merge works.
>From gcc-bugs-return-522635-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 20:24:53 2016
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From: "aleks at physik dot tu-berlin.de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/70707] INT_MAX used before it is defined
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Alexander Kleinsorge <aleks at physik dot tu-berlin.de> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |aleks at physik dot tu-berlin.de
--- Comment #2 from Alexander Kleinsorge <aleks at physik dot tu-berlin.de> ---
Problem confirmed with: gcc (GCC) 5.3.0
Usage before definition is no header problem (as suggested by Lewis).
// TestCode, no includes
# define INT_MIN (-INT_MAX - 1)
# define INT_MAX 2147483647
int test1(int b) {
return (b + INT_MIN);
}
int main(int argc, char** argv) {
return test1( argc );
}
// EndOfFile
>From gcc-bugs-return-522636-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 20:26:05 2016
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Subject: [Bug c/70707] INT_MAX used before it is defined
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--- Comment #3 from Alexander Kleinsorge <aleks at physik dot tu-berlin.de> ---
Problem confirmed with: gcc (GCC) 5.3.0
Usage before definition is no header problem (as suggested by Lewis).
// TestCode, no includes
# define INT_MIN (-INT_MAX - 1)
# define INT_MAX 2147483647
int test1(int b) {
return (b + INT_MIN);
}
int main(int argc, char** argv) {
return test1( argc );
}
// EndOfFile
>From gcc-bugs-return-522637-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 20:39:10 2016
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Subject: [Bug libstdc++/70472] is_copy_constructible<vector<unique_ptr<int>>>::value is true
Date: Mon, 18 Apr 2016 20:39:00 -0000
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TC <rs2740 at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |rs2740 at gmail dot com
--- Comment #5 from TC <rs2740 at gmail dot com> ---
In any event, it would be wrong to SFINAE on
std::is_copy_constructible<value_type>. The requirement is CopyInsertable, not
CopyConstructible. The allocator's construct() can mutilate the constructor
arguments to its heart's content before passing them on, and I don't see a way
to check this.
>From gcc-bugs-return-522638-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 20:42:27 2016
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug sanitizer/70717] -fsanitize=object-size as warning
Date: Mon, 18 Apr 2016 20:42:00 -0000
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
You might get the warning with -D_FORTIFY_SOURCE=1 but I have not tried it
myself.
>From gcc-bugs-return-522639-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 20:48:53 2016
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Subject: [Bug c++/60799] access checking within injected friend functions does not happen in the context of the enclosing class
Date: Mon, 18 Apr 2016 20:48:00 -0000
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TC <rs2740 at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |rs2740 at gmail dot com
--- Comment #4 from TC <rs2740 at gmail dot com> ---
(In reply to Casey Carter from comment #3)
> > I'm inclined to the second interpretation, which would imply the behavior described in this bug report is what the standard intends.
>
> This is me stumbling over my words attempting to say "I think this is NOT a
> bug."
I don't think that reading makes much sense. Among member-declarations that do
not declare a member are static_assert-declarations and unnamed bit-field
declarations, so that reading disallows
class A {
constexpr static bool value = true;
friend class B;
};
class B {
static_assert(B::value, "");
};
And disallows D in the below example but not E:
class C {
constexpr static int value = 4;
friend class D;
friend class E;
};
class D {
int : C::value;
};
class E {
int i : C::value;
};
>From gcc-bugs-return-522641-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 20:49:25 2016
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug preprocessor/70707] INT_MAX used before it is defined
Date: Mon, 18 Apr 2016 20:49:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Component|c |preprocessor
--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
There is no bug here. The prepocessor works this way.
That is the INT_MIN is replaced with (-INT_MAX - 1) and then INT_MAX is
replaced with 2147483647 when the usage of INT_MIN happens.
>From gcc-bugs-return-522640-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 20:49:12 2016
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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/70717] -fsanitize=object-size as warning
Date: Mon, 18 Apr 2016 20:49:00 -0000
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
-D_FORTIFY_SOURCE=1 or -D_FORTIFY_SOURCE=2 handle this well:
warning: call to __builtin___memcpy_chk will always overflow destination buffer
>From gcc-bugs-return-522642-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 21:19:22 2016
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From: "stilor at att dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70718] New: multilib_defaults on nios2 refers to -EL
Date: Mon, 18 Apr 2016 21:19:00 -0000
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Bug ID: 70718
Summary: multilib_defaults on nios2 refers to -EL
Product: gcc
Version: 7.0
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Created attachment 38304
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38304&action=edit
Proposed fix
On nios2, multilib_defaults spec refers to the -EL/-EB options, but the driver
does not recognize them on nios2. Instead, the driver uses -mel/-meb (see the
asm/link specs, right next to the modified multilib spec, in the attached
patch).
>From gcc-bugs-return-522643-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 21:20:26 2016
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From: "Casey at Carter dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/60799] access checking within injected friend functions does not happen in the context of the enclosing class
Date: Mon, 18 Apr 2016 21:20:00 -0000
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--- Comment #5 from Casey Carter <Casey at Carter dot net> ---
(In reply to TC from comment #4)
>
> I don't think that reading makes much sense. Among member-declarations that
> do not declare a member are static_assert-declarations and unnamed bit-field
> declarations, so that reading disallows
>
> class A {
> constexpr static bool value = true;
> friend class B;
> };
>
> class B {
> static_assert(B::value, "");
> };
>
> And disallows D in the below example but not E:
>
> class C {
> constexpr static int value = 4;
> friend class D;
> friend class E;
> };
>
> class D {
> int : C::value;
> };
>
> class E {
> int i : C::value;
> };
I agree that my interpretation breaks things that should work, but given how
[class.mem]/1 goes out of its way to distinguish between member-declarations
and "declarations of members", it does seem to be what is specified. I think
the intent has been lost in the wording.
I've just discovered this problem is the topic of open CWG issue 1699
http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_active.html#1699; upstream is
already on-the-job.
>From gcc-bugs-return-522644-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 21:22:14 2016
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Subject: [Bug c++/70667] SFINAE error disambiguating using alignas
Date: Mon, 18 Apr 2016 21:22:00 -0000
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TC <rs2740 at gmail dot com> changed:
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----------------------------------------------------------------------------
CC| |rs2740 at gmail dot com
--- Comment #1 from TC <rs2740 at gmail dot com> ---
The error here (in the definition of `A`) certainly looks like it's outside the
immediate context...?
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug testsuite/70719] New: the libjava testsuite does not work with dejagnu 1.6
Date: Mon, 18 Apr 2016 21:37:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70719
Bug ID: 70719
Summary: the libjava testsuite does not work with dejagnu 1.6
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: testsuite
Assignee: unassigned at gcc dot gnu.org
Reporter: dominiq at lps dot ens.fr
Target Milestone: ---
The libjava testsuite does not work with dejagnu 1.6:
=== libjava tests ===
Schedule of variations:
unix/-m32
unix/-m64
Running target unix/-m32
Using /sw64/share/dejagnu/baseboards/unix.exp as board description file for
target.
Using /sw64/share/dejagnu/config/unix.exp as generic interface file for target.
Using ../../../../_clean/libjava/testsuite/config/default.exp as
tool-and-target-specific interface file.
Running ../../../../_clean/libjava/testsuite/libjava.cni/cni.exp ...
ERROR: (DejaGnu) proc "absolute
/opt/gcc/build_c/x86_64-apple-darwin15.4.0/libjava/testsuite" does not exist.
The error code is TCL LOOKUP COMMAND absolute
The info on the error is:
invalid command name "absolute"
while executing
"::tcl_unknown absolute
/opt/gcc/build_c/x86_64-apple-darwin15.4.0/libjava/testsuite"
("uplevel" body line 1)
invoked from within
"uplevel 1 ::tcl_unknown $args"
=== libjava Summary ===
# of expected passes 1
Makefile:409: recipe for target 'check-DEJAGNU' failed
make[1]: *** [check-DEJAGNU] Error 1
make[1]: Leaving directory
'/opt/gcc/build_c/x86_64-apple-darwin15.4.0/libjava/testsuite'
Makefile:427: recipe for target 'check-am' failed
make: *** [check-am] Error 2
make: Target 'check' not remade because of errors.
Probably related to
1.2 New in this release
...
6. The user-visible utility procedures absolute, psource and slay have been
removed. If a testsuite uses any of these procedures, a copy of the procedure
should be made and placed in the lib directory of the testsuite.
>From gcc-bugs-return-522646-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 21:37:54 2016
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From: "joel at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libgcc/70720] New: moxie-rtems stanza does not include crti/crtn extra_parts
Date: Mon, 18 Apr 2016 21:37:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70720
Bug ID: 70720
Summary: moxie-rtems stanza does not include crti/crtn
extra_parts
Product: gcc
Version: 4.9.4
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libgcc
Assignee: unassigned at gcc dot gnu.org
Reporter: joel at gcc dot gnu.org
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Created attachment 38305
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38305&action=edit
Merge moxie-rtems stanza with other moxie stanzas.
moxie-rtems C++ applications fail to link because, the moxie-rtems stanza in
libgcc/config.host does not include extra_parts.
The solution is to add moxie-rtems to the list of other moxie targets above and
delete the special moxie-rtems stanza.
Filing this as a bug since it impacts at least from gcc 4.9 to the master.
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Subject: [Bug c++/70667] SFINAE error disambiguating using alignas
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--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
I'm not sure if that changes the validity of the test case (the invalid
alignment on the member makes the whole class invalid) but the error is the
same with A defined with the alignment specifier rather than its member.
template <int N> struct alignas (N) A { int a; };
>From gcc-bugs-return-522648-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 22:06:03 2016
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--- Comment #8 from Matthias Klose <doko at gcc dot gnu.org> ---
I prepared a patch for the distro builds. Any reason that this can't go to the
gcc-5-branch?
>From gcc-bugs-return-522649-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 22:27:58 2016
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--- Comment #9 from David Edelsohn <dje at gcc dot gnu.org> ---
r224187 works
>From gcc-bugs-return-522650-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 18 23:35:28 2016
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Subject: [Bug middle-end/70689] [6/7 Regression] ICE on valid code at -O1 in 32-bit mode on x86_64-linux-gnu in curr_insn_transform, at lra-constraints.c:3564
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--- Comment #3 from Vladimir Makarov <vmakarov at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #2)
>
> Vlad, could you please have a look at this?
I've started work on it.
>From gcc-bugs-return-522651-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 19 00:30:49 2016
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Subject: [Bug c/29280] misleading warning for assignment used as truth construct
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--- Comment #6 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
(In reply to Martin Sebor from comment #5)
> It seems like it should be trivial to enhance the warning by adding a note
> with the suggestion(s) mentioned in the request.
Given all the cases mentioned in PR25733, we should find a better way for users
to silence the warning. For example, by using an explicit cast.
Example:
int foo(int a, int b)
{
return ((a = b) ? 1 : 0); // <= missed warning.
}
warning: using the result of an assignment as a boolean expression
[-Wparentheses]
return ((a = b) ? 1 : 0);
~~^~~
note: add an explicit cast to bool to silence this warning
return ((a = b) ? 1 : 0);
^
(bool)
note: use '==' to turn this assignment into an equality comparison
return ((a = b) ? 1 : 0);
^
==
>From gcc-bugs-return-522652-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 19 00:34:50 2016
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Subject: [Bug target/70721] New: Suboptimal code generated when using _mm_min_sd
Date: Tue, 19 Apr 2016 00:34:00 -0000
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Bug ID: 70721
Summary: Suboptimal code generated when using _mm_min_sd
Product: gcc
Version: 7.0
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_mm_min_sd is implemented as
(define_insn "<sse>_vm<code><mode>3<round_saeonly_name>"
[(set (match_operand:VF_128 0 "register_operand" "=x,v")
(vec_merge:VF_128
(smaxmin:VF_128
(match_operand:VF_128 1 "register_operand" "0,v")
(match_operand:VF_128 2 "vector_operand"
"xBm,<round_saeonly_constraint>"))
(match_dup 1)
(const_int 1)))]
The problem is smaxmin is applied to the full 128-bit operand.
Can we change it to apply only to the first 64-bit of operand
so that we can remove 2 xmm moves in
---
#include <emmintrin.h>
double
__attribute ((noinline, noclone))
foo (double a, double b)
{
__m128d x = _mm_set_sd(a);
__m128d y = _mm_set_sd(b);
return _mm_cvtsd_f64(_mm_min_sd(x, y));
}
---
>From gcc-bugs-return-522653-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 19 00:35:54 2016
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Subject: [Bug target/70708] Suboptimal code generated when using _mm_set_sd (X64)
Date: Tue, 19 Apr 2016 00:35:00 -0000
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--- Comment #16 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Marc Glisse from comment #15)
> MyMinV2 returns a double, not a __m128d. I tried to read what the ABI says
> about the unused upper part of SSE registers when passing/returning a double
> and couldn't find any information. Could you explain in more details what
> makes MyMinV2 so different from MyMinV1? I appear to be missing some crucial
> piece of information here :-(
I opened PR 70721 for the _mm_min_sd issue.
>From gcc-bugs-return-522654-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 19 01:20:45 2016
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Subject: [Bug bootstrap/70704] [6 Regression] AIX bootstrap comparison failure
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--- Comment #10 from David Edelsohn <dje at gcc dot gnu.org> ---
This is starting to look like PR60984 all over again. Testing trunk with
--enable-checking=release succeeds.
>From gcc-bugs-return-522655-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 19 01:57:33 2016
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Subject: [Bug target/68211] Free __m128d subreg of double
Date: Tue, 19 Apr 2016 01:57:00 -0000
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Last reconfirmed| |2016-04-19
CC| |kirill.yukhin at intel dot com
Resolution|DUPLICATE |---
Ever confirmed|0 |1
--- Comment #5 from H.J. Lu <hjl.tools at gmail dot com> ---
There is
(insn 10 9 11 2 (parallel [
(set (reg:V2DF 92)
(vec_merge:V2DF (sqrt:V2DF (reg:V2DF 93))
(reg:V2DF 94)
(const_int 1 [0x1])))
(unspec [
(const_int 10 [0xa])
] UNSPEC_EMBEDDED_ROUNDING)
])
/export/build/gnu/gcc/build-x86_64-linux/gcc/include/avx512fintrin.h:1736 1448
{sse2_vmsqrtv2df2_round}
(nil))
Is that possible to change it to make sqrt to apply only to the
first 64-bit of input operand?
>From gcc-bugs-return-522656-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 19 02:46:16 2016
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Subject: [Bug target/70721] Suboptimal code generated when using _mm_min_sd
Date: Tue, 19 Apr 2016 02:46:00 -0000
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-19
CC| |ubizjak at gmail dot com
Target Milestone|--- |7.0
Ever confirmed|0 |1
--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
This is NOT the fix. But you should get the idea:
[hjl@gnu-6 pr70708]$ cat y.c
#include <emmintrin.h>
double
__attribute ((noinline, noclone))
foo (double a, double b)
{
__m128d x = _mm_set_sd(a);
__m128d y = _mm_set_sd(b);
return _mm_cvtsd_f64(_mm_min_sd(x, y));
}
[hjl@gnu-6 pr70708]$ make y.s
/export/build/gnu/gcc/build-x86_64-linux/gcc/xgcc
-B/export/build/gnu/gcc/build-x86_64-linux/gcc/ -O2 -S -o y.s y.c
[hjl@gnu-6 pr70708]$ cat y.s
.file "y.c"
.text
.p2align 4,,15
.globl foo
.type foo, @function
foo:
.LFB525:
.cfi_startproc
minsd %xmm1, %xmm0
ret
.cfi_endproc
.LFE525:
.size foo, .-foo
.ident "GCC: (GNU) 7.0.0 20160418 (experimental)"
.section .note.GNU-stack,"",@progbits
[hjl@gnu-6 pr70708]$ cat /tmp/x
diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index a66cfc4..167a564 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -32934,7 +32934,7 @@ static const struct builtin_description bdesc_args[] =
{ OPTION_MASK_ISA_SSE2, CODE_FOR_sminv2df3, "__builtin_ia32_minpd",
IX86_BUILTIN_MINPD, UNKNOWN, (int) V2DF_FTYPE_V2DF_V2DF },
{ OPTION_MASK_ISA_SSE2, CODE_FOR_smaxv2df3, "__builtin_ia32_maxpd",
IX86_BUILTIN_MAXPD, UNKNOWN, (int) V2DF_FTYPE_V2DF_V2DF },
- { OPTION_MASK_ISA_SSE2, CODE_FOR_sse2_vmsminv2df3, "__builtin_ia32_minsd",
IX86_BUILTIN_MINSD, UNKNOWN, (int) V2DF_FTYPE_V2DF_V2DF },
+ { OPTION_MASK_ISA_SSE2, CODE_FOR_xx_vmsminv2df3, "__builtin_ia32_minsd",
IX86_BUILTIN_MINSD, UNKNOWN, (int) V2DF_FTYPE_V2DF_V2DF },
{ OPTION_MASK_ISA_SSE2, CODE_FOR_sse2_vmsmaxv2df3, "__builtin_ia32_maxsd",
IX86_BUILTIN_MAXSD, UNKNOWN, (int) V2DF_FTYPE_V2DF_V2DF },
{ OPTION_MASK_ISA_SSE2, CODE_FOR_andv2df3, "__builtin_ia32_andpd",
IX86_BUILTIN_ANDPD, UNKNOWN, (int) V2DF_FTYPE_V2DF_V2DF },
diff --git a/gcc/config/i386/sse.md b/gcc/config/i386/sse.md
index 78c28c5..c8ce275 100644
--- a/gcc/config/i386/sse.md
+++ b/gcc/config/i386/sse.md
@@ -1656,6 +1656,28 @@
(set_attr "prefix" "<round_saeonly_prefix>")
(set_attr "mode" "<ssescalarmode>")])
+(define_insn "xx_vm<code>v2df3"
+ [(set (match_operand:V2DF 0 "register_operand" "=x,v")
+ (vec_concat:V2DF
+ (smaxmin:DF
+ (vec_select:DF
+ (match_operand:V2DF 1 "register_operand" "0,v")
+ (parallel [(const_int 0)]))
+ (vec_select:DF
+ (match_operand:V2DF 2 "vector_operand" "xm,vm")
+ (parallel [(const_int 0)])))
+ (vec_select:DF (match_dup 0)
+ (parallel [(const_int 1)]))))]
+ "TARGET_SSE2"
+ "@
+ <maxmin_float>sd\t{%2, %0|%0, %2}
+ v<maxmin_float>sd\t{%2, %1, %0|%0, %1, %2}"
+ [(set_attr "isa" "noavx,avx")
+ (set_attr "type" "sse")
+ (set_attr "prefix" "orig,vex")
+ (set_attr "btver2_sse_attr" "maxmin")
+ (set_attr "mode" "DF")])
+
;; These versions of the min/max patterns implement exactly the operations
;; min = (op1 < op2 ? op1 : op2)
;; max = (!(op1 < op2) ? op1 : op2)
[hjl@gnu-6 pr70708]$
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Subject: [Bug middle-end/70689] [6/7 Regression] ICE on valid code at -O1 in 32-bit mode on x86_64-linux-gnu in curr_insn_transform, at lra-constraints.c:3564
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--- Comment #4 from Vladimir Makarov <vmakarov at gcc dot gnu.org> ---
Author: vmakarov
Date: Tue Apr 19 02:49:54 2016
New Revision: 235184
URL: https://gcc.gnu.org/viewcvs?rev=235184&root=gcc&view=rev
Log:
2016-04-18 Vladimir Makarov <vmakarov@redhat.com>
PR middle-end/70689
* lra-constraints.c (equiv_substition_p): New.
(process_alt_operands): Use it.
(swap_operands): Swap it.
(curr_insn_transform): Update it.
2016-04-18 Vladimir Makarov <vmakarov@redhat.com>
PR middle-end/70689
* testsuite/gcc.target/i386/pr70689.c: New.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr70689.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/lra-constraints.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-522658-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 19 05:07:39 2016
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Subject: [Bug libstdc++/70722] New: include_next in cmath skips user-defined wrapper
Date: Tue, 19 Apr 2016 05:07:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70722
Bug ID: 70722
Summary: include_next in cmath skips user-defined wrapper
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
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Target Milestone: ---
Firefox has a bunch of wrappers for system headers. I'm not 100% on the
reasoning, but most just play with visibility. For instance, the math.h
wrapper looks like:
#pragma GCC system_header
#pragma GCC visibility push(default)
#include_next <math.h>
#pragma GCC visibility pop
Firefox fails to link when built with libstdc++ 6.0.0 because it includes
<cmath> before it includes <math.h>. This leads to inclusion of <math.h> with
different visibility than is desired.
The version of cmath I have includes this:
#define _GLIBCXX_INCLUDE_NEXT_C_HEADERS
#include_next <math.h>
#undef _GLIBCXX_INCLUDE_NEXT_C_HEADERS
Removing the "_next" causes the build to succeed.
You can see my flailings regarding this issue here:
https://bugzilla.mozilla.org/show_bug.cgi?id=1264534
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Subject: [Bug libstdc++/70722] include_next in cmath skips user-defined wrapper
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--- Comment #1 from Martin Thomson <martin.thomson at gmail dot com> ---
My ViewCVS-fu isn't that good, it took me long enough to find this:
https://gcc.gnu.org/viewcvs/gcc/trunk/libstdc%2B%2B-v3/include/c_global/cmath?r1=232585&r2=232586&
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Subject: [Bug libstdc++/70722] include_next in cmath skips user-defined wrapper
Date: Tue, 19 Apr 2016 06:00:00 -0000
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |trippels at gcc dot gnu.org
Resolution|--- |INVALID
--- Comment #2 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
See: http://gcc.gnu.org/gcc-6/porting_to.html
For Firefox the following patch works for me:
diff --git a/nsprpub/config/make-system-wrappers.pl
b/nsprpub/config/make-system-wrappers.pl
index fa0873a78e0a..6a3aee337908 100644
--- a/nsprpub/config/make-system-wrappers.pl
+++ b/nsprpub/config/make-system-wrappers.pl
@@ -19,7 +19,9 @@ while (<STDIN>) {
open OUT, ">$output_dir/$_";
print OUT "#pragma GCC system_header\n"; # suppress include_next warning
print OUT "#pragma GCC visibility push(default)\n";
+ print OUT "#define _GLIBCXX_INCLUDE_NEXT_C_HEADERS\n";
print OUT "#include_next \<$_\>\n";
+ print OUT "#undef _GLIBCXX_INCLUDE_NEXT_C_HEADERS\n";
print OUT "#pragma GCC visibility pop\n";
close OUT;
}
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Subject: [Bug c++/70690] [6/7 Regression] r235002 miscompiles tcmalloc
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #8 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Thanks for the quick fix.
>From gcc-bugs-return-522662-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 19 07:28:47 2016
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Subject: [Bug target/70721] Suboptimal code generated when using _mm_min_sd
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--- Comment #2 from Marc Glisse <glisse at gcc dot gnu.org> ---
There were already a number of discussions on gcc-patches in 2012 (Oct, Nov,
Dec) with title "[i386] scalar ops that preserve the high part of a vector"
(see also PR54855). In particular, around this message, rth says he doesn't
like the vec_concat approach I had started with and prefers using vec_merge as
with v4sf.
https://gcc.gnu.org/ml/gcc-patches/2012-12/msg00824.html
The latest message AFAICS was
https://gcc.gnu.org/ml/gcc-patches/2012-12/msg00824.html which approves one
approach, but I never found time to complete the series. (of course we should
check that people haven't changed their mind since then)
>From gcc-bugs-return-522663-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 19 08:15:57 2016
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From: "m.cencora at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70723] New: Missed optimization opportunity for lambda converted to fun-ptr
Date: Tue, 19 Apr 2016 08:15:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70723
Bug ID: 70723
Summary: Missed optimization opportunity for lambda converted
to fun-ptr
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: enhancement
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: m.cencora at gmail dot com
Target Milestone: ---
Hi,
the following code gets properly optimized-out if erasedTypeVTable is
initialized with &dtor<T> (case [2]), but it is not optimized if initialized
with lambda (case [1]).
#include <type_traits>
#include <new>
namespace
{
struct ErasedTypeVTable
{
using destructor_t = void (*)(void *obj);
destructor_t dtor;
};
template <typename T>
void dtor(void *obj)
{
return static_cast<T *>(obj)->~T();
}
template <typename T>
static const ErasedTypeVTable erasedTypeVTable = {
/* 1 */ [] (void *obj) { return static_cast<T *>(obj)->~T(); }
/* 2 */ // &dtor<T>
};
struct myType
{
int a;
};
void meow()
{
std::aligned_storage<sizeof(myType)>::type storage;
auto *ptr = new ((char *)(&storage)) myType{5};
ptr->a = 10;
erasedTypeVTable<myType>.dtor(ptr);
}
}
int main()
{
meow();
}
Compiled with -O3 -std=c++14 flags.
g++ --version:
g++ (Ubuntu 6-20160405-0ubuntu1) 6.0.0 20160405 (experimental) [trunk revision
234749]
FWIW, clang 3.8 optimizes both versions.
>From gcc-bugs-return-522664-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 19 09:00:54 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/70724] New: [6 Regression] Miscompiles python3 with FDO
Date: Tue, 19 Apr 2016 09:00:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70724
Bug ID: 70724
Summary: [6 Regression] Miscompiles python3 with FDO
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Keywords: wrong-code
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: rguenth at gcc dot gnu.org
Target Milestone: ---
Testcase:
extern void abort (void);
typedef long int _PyTime_t;
typedef enum { _PyTime_ROUND_FLOOR = 0, _PyTime_ROUND_CEILING = 1 }
_PyTime_round_t;
static _PyTime_t
_PyTime_Divide(const _PyTime_t t, const _PyTime_t k,
const _PyTime_round_t round)
{
if (round == _PyTime_ROUND_CEILING) {
if (t >= 0)
return (t + k - 1) / k;
else
return t / k;
}
else {
if (t >= 0)
return t / k;
else
return (t - (k - 1)) / k;
}
}
_PyTime_t __attribute__((noinline,noclone))
_PyTime_AsMicroseconds(_PyTime_t t, _PyTime_round_t round)
{
return _PyTime_Divide(t, 1000, round);
}
int main()
{
if (_PyTime_AsMicroseconds (10000, _PyTime_ROUND_FLOOR) != 10)
abort ();
return 0;
}
is miscompiled at -O2 -fprofile-use (actually with -O2 -ftracer).
The issue is tail-merging which merges
<bb 5>:
# RANGE [-9223372036854775, 0]
_6 = t_2(D) / 1000;
goto <bb 9>;
and
<bb 7>:
# RANGE [0, 9223372036854775] NONZERO 18014398509481983
_7 = t_2(D) / 1000;
goto <bb 9>;
not resetting range info. VRP2 then miscompiles the division to always zero.
>From gcc-bugs-return-522665-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 19 09:04:42 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/70724] [6/7 Regression] Miscompiles python3 with FDO
Date: Tue, 19 Apr 2016 09:04:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70724
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2016-04-19
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Target Milestone|--- |6.0
Summary|[6 Regression] Miscompiles |[6/7 Regression]
|python3 with FDO |Miscompiles python3 with
| |FDO
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
The resetting that tail-merging does is undone by free_scc_vn.
>From gcc-bugs-return-522666-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 19 09:09:12 2016
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From: "anton.mitrokhin at phystech dot edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70725] New: Internal compiler error (ICE) on valid code
Date: Tue, 19 Apr 2016 09:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70725
Bug ID: 70725
Summary: Internal compiler error (ICE) on valid code
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: anton.mitrokhin at phystech dot edu
Target Milestone: ---
Created attachment 38306
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38306&action=edit
Reproducer
Test case produces internal compiler error with skylake-avx512, broadwell and
knl targets on -O3 and -Ofast.
Reproducer:
> g++ -std=c++11 -Ofast -march=skylake-avx512 -c -o out small_if_conf.cpp
> g++ -std=c++11 -Ofast -march=broadwell -c -o out small_if_conf.cpp
> g++ -std=c++11 -Ofast -march=knl -c -o out small_if_conf.cpp
Output:
small.cpp: In function 'void fn1()':
small.cpp:13:6: internal compiler error: in predicate_mem_writes, at
tree-if-conv.c:2033
void fn1() {
^~~
0xd62007 predicate_mem_writes
/export/users/gnutester/stability/svn/trunk/gcc/tree-if-conv.c:2033
0xd62007 combine_blocks
/export/users/gnutester/stability/svn/trunk/gcc/tree-if-conv.c:2150
0xd644d8 tree_if_conversion
/export/users/gnutester/stability/svn/trunk/gcc/tree-if-conv.c:2655
0xd644d8 execute
/export/users/gnutester/stability/svn/trunk/gcc/tree-if-conv.c:2741
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
------------------
> gcc -v:
------------------
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/export/users/amitrokh/gcc_trunk/bin/../libexec/gcc/x86_64-pc-linux-gnu/7.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /export/users/gnutester/stability/svn/trunk/configure
--with-arch=corei7 --with-cpu=corei7 --enable-clocale=gnu --with-system-zlib
--enable-shared --with-demangler-in-ld --enable-cloog-backend=isl
--with-fpmath=sse --with-pkgversion=Revision=235172/svn-rev:235172/
--prefix=/export/users/gnutester/stability/work/trunk/64/install
--enable-languages=c,c++,fortran,java,lto
Thread model: posix
gcc version 7.0.0 20160418 (experimental) (Revision=235172/svn-rev:235172/)
>From gcc-bugs-return-522667-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 19 09:16:49 2016
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From: "anton.mitrokhin at phystech dot edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70726] New: Internal compiler error (ICE) on valid code
Date: Tue, 19 Apr 2016 09:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70726
Bug ID: 70726
Summary: Internal compiler error (ICE) on valid code
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: anton.mitrokhin at phystech dot edu
Target Milestone: ---
Created attachment 38307
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38307&action=edit
Reproducer
GCC gives internal compiler error on knl, broadwell and skylake-avx512 targets
with -O3 and -Ofast.
Reproducer:
> g++ -std=c++11 -Ofast -march=knl -c -o out small.cpp
> g++ -std=c++11 -Ofast -march=broadwell -c -o out small.cpp
> g++ -std=c++11 -Ofast -march=skylake-avx512 -c -o out small.cpp
Output:
small.cpp: In function 'void fn1()':
small.cpp:9:6: internal compiler error: Segmentation fault
void fn1() {
^~~
0xcf8d3f crash_signal
/export/users/gnutester/stability/svn/trunk/gcc/toplev.c:335
0xa71c81 is_gimple_reg_type
/export/users/gnutester/stability/svn/trunk/gcc/gimple-expr.h:75
0xa71c81 is_gimple_val(tree_node*)
/export/users/gnutester/stability/svn/trunk/gcc/gimple-expr.c:781
0xd26cdf verify_gimple_assign_binary
/export/users/gnutester/stability/svn/trunk/gcc/tree-cfg.c:3704
0xd3a063 verify_gimple_in_cfg(function*, bool)
/export/users/gnutester/stability/svn/trunk/gcc/tree-cfg.c:5052
0xc2e1a3 execute_function_todo
/export/users/gnutester/stability/svn/trunk/gcc/passes.c:1968
0xc2eb6b execute_todo
/export/users/gnutester/stability/svn/trunk/gcc/passes.c:2020
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
---------------
> gcc -v
---------------
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/export/users/amitrokh/gcc_trunk/bin/../libexec/gcc/x86_64-pc-linux-gnu/7.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /export/users/gnutester/stability/svn/trunk/configure
--with-arch=corei7 --with-cpu=corei7 --enable-clocale=gnu --with-system-zlib
--enable-shared --with-demangler-in-ld --enable-cloog-backend=isl
--with-fpmath=sse --with-pkgversion=Revision=235172/svn-rev:235172/
--prefix=/export/users/gnutester/stability/work/trunk/64/install
--enable-languages=c,c++,fortran,java,lto
Thread model: posix
gcc version 7.0.0 20160418 (experimental) (Revision=235172/svn-rev:235172/)
>From gcc-bugs-return-522668-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 19 09:40:29 2016
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Subject: [Bug target/70721] Suboptimal code generated when using _mm_min_sd
Date: Tue, 19 Apr 2016 09:40:00 -0000
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
IMHO vec_merge should go (it doesn't scale to arbitrary large vector modes, it
already uses all bits of the CONST_INT for AVX512 V64QImode). vec_merge
would need to change to a CONST_{DOUBLE,WIDE} to accomodate larger vectors.
OTOH the other canonical form with (vec_select (vec_concat ...)) requires
larger vector modes. What we lack is sth similar to VEC_PERM_EXPR here,
unifying the vec_merge and the (vec_select (vec_concat ...)) cases.
>From gcc-bugs-return-522669-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 19 09:50:12 2016
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Subject: [Bug libgcc/68126] internal compiler error: in maybe_record_trace_start, at dwarf2cfi.c:2239 while compiling under platform mips64el
Date: Tue, 19 Apr 2016 09:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68126
--- Comment #2 from Hu Liang <hl8765 at 163 dot com> ---
(In reply to Steve Ellcey from comment #1)
> It looks like this is actually a bug in the GCC 4.4.7 compiler on the system
> where you are building GCC. gensupport.c is compiled with the system
> compiler in order to build gensupport which is run as part of the build.
> Your best bet would be to do the build with a newer system compiler if you
> have one.
I just want to update the GCC compiler from GCC 4.4.7 to GCC 4.9.2
>From gcc-bugs-return-522670-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 19 09:53:33 2016
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Subject: [Bug c++/70723] Missed optimization opportunity for lambda converted to fun-ptr
Date: Tue, 19 Apr 2016 09:53:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70723
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-19
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
The initializer of erasedTypeVTable is not statically available but involves
runtime computation:
;; Function void __static_initialization_and_destruction_0(int, int) (null)
;; enabled by -tree-original
if (__initialize_p == 1)
{
if (__priority == 65535)
{
<<cleanup_point <<< Unknown tree: expr_stmt
erasedTypeVTable.dtor = {anonymous}::<lambda(void*)>::operator void
(*)(void*) (&TARGET_EXPR <D.5974, {}>) >>>>>;
<<< Unknown tree: expr_stmt
<<< Unknown tree: void_cst >>> >>>;
}
}
;; Function (static initializers for t.C) (null)
;; enabled by -tree-original
<<cleanup_point <<< Unknown tree: expr_stmt
__static_initialization_and_destruction_0 (1, 65535) >>>>>;
thats probably because the lambda is not evaluated in a constexpr context.
If I make erasedTypeVTable a constexpr I get
t.C: In instantiation of ‘constexpr const {anonymous}::ErasedTypeVTable
{anonymous}::erasedTypeVTable<{anonymous}::myType>’:
t.C:36:7: required from here
t.C:20:41: error: call to non-constexpr function
‘{anonymous}::<lambda(void*)>::operator void (*)(void*)() const’
static constexpr ErasedTypeVTable erasedTypeVTable = {
^~~~~~~~~~~~~~~~
not sure how I would make the lambda a constexpr.
There is no pass in GCC that would try to turn the runtime initialization
into static init again (optimizing the runtime initializers and parsing
them back to static initializers).
>From gcc-bugs-return-522671-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 19 09:58:03 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70725] Internal compiler error (ICE) on valid code
Date: Tue, 19 Apr 2016 09:58:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-19
Ever confirmed|0 |1
Known to fail| |6.1.0, 7.0
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
2043 if (COMPARISON_CLASS_P (cond))
2044 mask = gimple_build (&stmts, TREE_CODE (cond),
(gdb) l
2045 boolean_type_node,
2046 TREE_OPERAND (cond, 0),
2047 TREE_OPERAND (cond, 1));
2048 else
2049 {
2050 gcc_assert (TREE_CODE (cond) == SSA_NAME);
2051 mask = cond;
2052 }
(gdb) p cond
$1 = <integer_cst 0x7ffff68a91b0>
(gdb) p debug_generic_expr (cond)
0
we guard against is_true_predicate but not against is_false_predicate.
>From gcc-bugs-return-522672-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 19 10:01:05 2016
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Subject: [Bug c++/70726] Internal compiler error (ICE) on valid code
Date: Tue, 19 Apr 2016 10:01:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-19
Ever confirmed|0 |1
Known to fail| |6.1.0, 7.0
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. We end up with a released SSA name in the IL after BB
vectorization.
>From gcc-bugs-return-522673-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 19 10:03:18 2016
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Subject: [Bug c++/70725] Internal compiler error (ICE) on valid code
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |mpolacek at gcc dot gnu.org
--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
is_false_predicate doesn't seem to exist. If this is all about adding that and
using the new check, then I can take care of this.
>From gcc-bugs-return-522674-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 19 10:09:46 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70725] Internal compiler error (ICE) on valid code
Date: Tue, 19 Apr 2016 10:09:00 -0000
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
I think so. Of course only if-conversion figuring out a BB is unreachable
is "interesting", too ... (it doesn't handle that case very intelligently,
but that's another story).
>From gcc-bugs-return-522675-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 19 10:16:16 2016
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Subject: [Bug libstdc++/70727] New: Non-reserved names in std::__basic_file
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Bug ID: 70727
Summary: Non-reserved names in std::__basic_file
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Keywords: rejects-valid
Severity: normal
Priority: P3
Component: libstdc++
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#define sys_open 1
#define fd 1
#define file 1
#include <fstream>
>From gcc-bugs-return-522676-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 19 10:17:51 2016
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Subject: [Bug c++/70725] Internal compiler error (ICE) on valid code
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Thanks, I'll experiment with this a bit.
>From gcc-bugs-return-522677-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 19 10:34:24 2016
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Subject: [Bug libstdc++/70472] is_copy_constructible<vector<unique_ptr<int>>>::value is true
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--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to TC from comment #5)
> In any event, it would be wrong to SFINAE on
> std::is_copy_constructible<value_type>. The requirement is CopyInsertable,
> not CopyConstructible. The allocator's construct() can mutilate the
> constructor arguments to its heart's content before passing them on, and I
> don't see a way to check this.
<bits/alloc_traits.h> has this:
// true if _Alloc::value_type is CopyInsertable into containers using _Alloc
template<typename _Alloc>
struct __is_copy_insertable
: __is_copy_insertable_impl<_Alloc>::type
{ };
But using it requires that std::vector::~vector() is defined as defaulted,
which would not be a simple change.
We used to use that for the unordered containers until r204790.
>From gcc-bugs-return-522678-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 19 10:37:14 2016
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Subject: [Bug libstdc++/70722] include_next in cmath skips user-defined wrapper
Date: Tue, 19 Apr 2016 10:37:00 -0000
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
As discussed when I introduced #include_next into <cmath>, if Firefox wants to
play games redefining system headers (which is explicitly undefined behaviour
according to the C++ standard) then it is Firefox's problem to make it work,
not ours.
This is documented at https://gcc.gnu.org/gcc-6/porting_to.html
Programs which provide their own wrappers for <stdlib.h> or other standard
headers are operating outside the standard and so are responsible for
ensuring
their headers work correctly with the headers in the C++ standard library.
>From gcc-bugs-return-522679-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 19 10:40:27 2016
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Subject: [Bug tree-optimization/70726] [6/7 Regression] Internal compiler error (ICE) on valid code
Date: Tue, 19 Apr 2016 10:40:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Component|c++ |tree-optimization
Known to work| |5.3.0
Target Milestone|--- |6.0
Summary|Internal compiler error |[6/7 Regression] Internal
|(ICE) on valid code |compiler error (ICE) on
| |valid code
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
I will have a look.
>From gcc-bugs-return-522680-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 19 10:44:27 2016
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Subject: [Bug tree-optimization/61056] strchr (x, 0) is not converted to strlen (x)
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--- Comment #3 from Oleg Endo <olegendo at gcc dot gnu.org> ---
Just for reference
https://gcc.gnu.org/ml/gcc-patches/2016-04/msg00870.html
>From gcc-bugs-return-522681-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 19 11:13:39 2016
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Subject: [Bug target/70662] vpbroadcastq assemble failure with -masm=intel -mavx512vbmi
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Kirill Yukhin <kyukhin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #8 from Kirill Yukhin <kyukhin at gcc dot gnu.org> ---
Done
>From gcc-bugs-return-522682-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 19 11:26:49 2016
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Subject: [Bug libstdc++/70472] is_copy_constructible<vector<unique_ptr<int>>>::value is true
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--- Comment #7 from TC <rs2740 at gmail dot com> ---
(In reply to Jonathan Wakely from comment #6)
> (In reply to TC from comment #5)
> > In any event, it would be wrong to SFINAE on
> > std::is_copy_constructible<value_type>. The requirement is CopyInsertable,
> > not CopyConstructible. The allocator's construct() can mutilate the
> > constructor arguments to its heart's content before passing them on, and I
> > don't see a way to check this.
>
> <bits/alloc_traits.h> has this:
>
> // true if _Alloc::value_type is CopyInsertable into containers using
> _Alloc
> template<typename _Alloc>
> struct __is_copy_insertable
> : __is_copy_insertable_impl<_Alloc>::type
> { };
>
> But using it requires that std::vector::~vector() is defined as defaulted,
> which would not be a simple change.
>
> We used to use that for the unordered containers until r204790.
That also requires the allocator's `construct` be SFINAE-friendly. Most aren't.
>From gcc-bugs-return-522683-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 19 11:50:27 2016
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From: "anton.mitrokhin at phystech dot edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70728] New: GCC trunk emits invalid assembly for knl target
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Bug ID: 70728
Summary: GCC trunk emits invalid assembly for knl target
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: anton.mitrokhin at phystech dot edu
Target Milestone: ---
Created attachment 38308
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38308&action=edit
Reproducer
Reproducer:
> g++ -std=c++11 -Ofast -march=knl -o out small.cpp
> sde –knl -- out
Output:
TID 0 SDE-ERROR: Executed instruction not valid for specified chip (KNL):
0x40084b: vpslld xmm8, xmm8, xmm16
Image: /export/users/amitrokh/forCreduce/untracked/knl_vpslld/out+0x84b (in
multi-region image, region# 0)
Function: _Z3fn1v
Instruction bytes are: 62 31 3d 08 f2 c0
> gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/export/users/amitrokh/gcc_trunk/bin/../libexec/gcc/x86_64-pc-linux-gnu/7.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /export/users/gnutester/stability/svn/trunk/configure
--with-arch=corei7 --with-cpu=corei7 --enable-clocale=gnu --with-system-zlib
--enable-shared --with-demangler-in-ld --enable-cloog-backend=isl
--with-fpmath=sse --with-pkgversion=Revision=235172/svn-rev:235172/
--prefix=/export/users/gnutester/stability/work/trunk/64/install
--enable-languages=c,c++,fortran,java,lto
Thread model: posix
gcc version 7.0.0 20160418 (experimental) (Revision=235172/svn-rev:235172/)
>From gcc-bugs-return-522684-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 19 11:52:55 2016
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Subject: [Bug target/70728] GCC trunk emits invalid assembly for knl target
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Kirill Yukhin <kyukhin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Target| |i?86/x86_64
Status|UNCONFIRMED |ASSIGNED
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CC| |kyukhin at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Kirill Yukhin <kyukhin at gcc dot gnu.org> ---
I'll take a look.
>From gcc-bugs-return-522685-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 19 12:19:48 2016
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From: "m.cencora at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70723] Missed optimization opportunity for lambda converted to fun-ptr
Date: Tue, 19 Apr 2016 12:19:00 -0000
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--- Comment #2 from m.cencora at gmail dot com ---
If that's the case then it should get automatically resolved once C++17 is
implemented - C++17 introduces constexpr lambdas.
But it would be great to have this optimization also in C++14 mode.
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From: "glisse at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70723] Missed optimization opportunity for lambda converted to fun-ptr
Date: Tue, 19 Apr 2016 12:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70723
--- Comment #3 from Marc Glisse <glisse at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #1)
> There is no pass in GCC that would try to turn the runtime initialization
> into static init again (optimizing the runtime initializers and parsing
> them back to static initializers).
PR65197 contains links to a few related PRs (no particular patch/idea IIRC,
just more examples).
>From gcc-bugs-return-522687-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 19 12:57:53 2016
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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/70704] [6 Regression] AIX bootstrap comparison failure
Date: Tue, 19 Apr 2016 12:57:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70704
--- Comment #11 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
I have tried bootstrap on AIX with
.../configure --prefix=`pwd` --enable-checking=release
--with-gmp=/opt/cfarm/gmp-latest/ --with-mpc=/opt/cfarm/mpc-latest/
--with-mpfr=/opt/cfarm/mpfr-latest/ && gmake -j16 2>&1 | tee LOG
and both trunk and gcc-6-branch work.
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Subject: [Bug bootstrap/70704] [6 Regression] AIX bootstrap comparison failure
Date: Tue, 19 Apr 2016 13:06:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70704
--- Comment #12 from David Edelsohn <dje at gcc dot gnu.org> ---
Current trunk works. I am testing gcc-6-branch now. But the RC itself does
not work.
>From gcc-bugs-return-522689-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 19 13:18:33 2016
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Subject: [Bug tree-optimization/70724] [6/7 Regression] Miscompiles python3 with FDO
Date: Tue, 19 Apr 2016 13:18:00 -0000
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Apr 19 13:17:46 2016
New Revision: 235201
URL: https://gcc.gnu.org/viewcvs?rev=235201&root=gcc&view=rev
Log:
2016-04-19 Richard Biener <rguenther@suse.de>
PR tree-optimization/70724
* tree-ssa-sccvn.c (scc_vn_restore_ssa_info): Split SSA info
restoring out from ...
(free_scc_vn): ... here.
* tree-ssa-sccvn.h (scc_vn_restore_ssa_info): Declare.
* tres-ssa-pre.c (pass_pre::execute): Restore SSA info before
tail merging.
(pass_fre::execute): Restore SSA info.
* gcc.dg/torture/pr70724.c: New testcase.
Added:
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr70724.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/testsuite/ChangeLog
branches/gcc-6-branch/gcc/tree-ssa-pre.c
branches/gcc-6-branch/gcc/tree-ssa-sccvn.c
branches/gcc-6-branch/gcc/tree-ssa-sccvn.h
>From gcc-bugs-return-522690-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 19 13:20:00 2016
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Subject: [Bug tree-optimization/70729] New: Loop marked with omp simd pragma is not vectorized
Date: Tue, 19 Apr 2016 13:19:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70729
Bug ID: 70729
Summary: Loop marked with omp simd pragma is not vectorized
Product: gcc
Version: 7.0
Status: UNCONFIRMED
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Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
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Target Milestone: ---
Analyzing performance of one important benchmark we found out that one of the
hot loop is no vectorized since loop-invariant load of the class member has not
been hoisted out of loop although loop was marked with omp simd pragma.
Test-case to reproduce is attached.
>From gcc-bugs-return-522691-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 19 13:22:19 2016
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Subject: [Bug tree-optimization/70729] Loop marked with omp simd pragma is not vectorized
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70729
--- Comment #1 from Yuri Rumyantsev <ysrumyan at gmail dot com> ---
Created attachment 38309
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38309&action=edit
test-case to reproduce
Must be compiled with -Ofast -mavx2 -fopenmp options on x86 machine.
>From gcc-bugs-return-522692-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 19 13:22:55 2016
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Subject: [Bug tree-optimization/70724] [6/7 Regression] Miscompiles python3 with FDO
Date: Tue, 19 Apr 2016 13:22:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed for GCC 6.1.
>From gcc-bugs-return-522693-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 19 13:23:04 2016
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Subject: [Bug tree-optimization/70724] [6/7 Regression] Miscompiles python3 with FDO
Date: Tue, 19 Apr 2016 13:23:00 -0000
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Apr 19 13:22:19 2016
New Revision: 235203
URL: https://gcc.gnu.org/viewcvs?rev=235203&root=gcc&view=rev
Log:
2016-04-19 Richard Biener <rguenther@suse.de>
PR tree-optimization/70724
* tree-ssa-sccvn.c (scc_vn_restore_ssa_info): Split SSA info
restoring out from ...
(free_scc_vn): ... here.
* tree-ssa-sccvn.h (scc_vn_restore_ssa_info): Declare.
* tres-ssa-pre.c (pass_pre::execute): Restore SSA info before
tail merging.
(pass_fre::execute): Restore SSA info.
* gcc.dg/torture/pr70724.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr70724.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-pre.c
trunk/gcc/tree-ssa-sccvn.c
trunk/gcc/tree-ssa-sccvn.h
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Subject: [Bug c++/70522] Hidden friend functions block qualified name lookup into nested unnamed namespace
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70522
Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2016-04-19
CC| |jason at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |jason at gcc dot gnu.org
Ever confirmed|0 |1
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Subject: [Bug c++/70522] Hidden friend functions block qualified name lookup into nested unnamed namespace
Date: Tue, 19 Apr 2016 13:40:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70522
--- Comment #1 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Tue Apr 19 13:40:03 2016
New Revision: 235206
URL: https://gcc.gnu.org/viewcvs?rev=235206&root=gcc&view=rev
Log:
PR c++/70522
* name-lookup.c (qualified_lookup_using_namespace): Look through
hidden names.
Added:
trunk/gcc/testsuite/g++.dg/lookup/friend18.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/name-lookup.c
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/70729] Loop marked with omp simd pragma is not vectorized
Date: Tue, 19 Apr 2016 13:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70729
Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
So the argument is that C1[S_n+1] doesn't alias in[] because of the omp simd
pragma and its guarantees? Otherwise I don't see how that can be guaranteed.
loop->safelen is 2147483647
it seems that INT_MAX is a special value (of course loops could iterate
more than INT_MAX times, so that special value is badly choosen - better
use some negative value like -1 as special value).
And invariant motion could use that property but does not.
Index: gcc/tree-ssa-loop-im.c
===================================================================
--- gcc/tree-ssa-loop-im.c (revision 235201)
+++ gcc/tree-ssa-loop-im.c (working copy)
@@ -2198,6 +2198,9 @@ ref_indep_loop_p (struct loop *loop, im_
{
gcc_checking_assert (MEM_ANALYZABLE (ref));
+ if (loop->safelen == INT_MAX)
+ return true;
+
return ref_indep_loop_p_2 (loop, ref, false);
}
fixes this. But better abstract loop->safelen == INT_MAX into a predicate
in cfgloop.h.
But even with that the loop is not vectorized because of
t.C:66:25: note: def_stmt: prephitmp_56 = PHI <_5(4), _20(6)>
t.C:66:25: note: type of def: unknown
t.C:66:25: note: Unsupported pattern.
t.C:66:25: note: not vectorized: unsupported use in stmt.
t.C:66:25: note: unexpected pattern.
because even if LIM manages to hoist this PRE has messed up this before
and we end up with
<bb 2>:
_5 = this_4(D)->S_n;
if (_5 > 0)
goto <bb 4>;
else
goto <bb 3>;
<bb 3>:
return;
<bb 4>:
pretmp_54 = this_4(D)->C2;
pretmp_57 = this_4(D)->C1;
pretmp_60 = MEM[(int * *)this_4(D) + 56B];
_20 = this_4(D)->S_n;
<bb 5>:
# i_33 = PHI <0(4), i_28(6)>
# prephitmp_56 = PHI <_5(4), _20(6)>
notice the redundant this->S_n load.
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Subject: [Bug tree-optimization/70729] Loop marked with omp simd pragma is not vectorized
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
-fno-tree-pre "fixes" this.
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Subject: [Bug tree-optimization/70729] Loop marked with omp simd pragma is not vectorized
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Doing invariant motion before PRE makes sense (w/o store motion, after
loop header copying).
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Subject: [Bug tree-optimization/70171] Poor code generated when return struct using ternary operator
Date: Tue, 19 Apr 2016 14:04:00 -0000
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--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Apr 19 14:03:59 2016
New Revision: 235208
URL: https://gcc.gnu.org/viewcvs?rev=235208&root=gcc&view=rev
Log:
2016-04-19 Richard Biener <rguenther@suse.de>
PR tree-optimization/70171
* tree-ssa-phiprop.c: Include stor-layout.h.
(phiprop_insert_phi): Handle the aggregate copy case.
(propagate_with_phi): Likewise.
* g++.dg/tree-ssa/pr70171.C: New testcase.
Added:
trunk/gcc/testsuite/g++.dg/tree-ssa/pr70171.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-phiprop.c
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Subject: [Bug tree-optimization/70171] Poor code generated when return struct using ternary operator
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |7.0
Resolution|--- |FIXED
--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed for GCC 7.
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Subject: [Bug c/70730] New: Inconsistent column number in "error: attempt to take address of bit-field structure member"
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Bug ID: 70730
Summary: Inconsistent column number in "error: attempt to take
address of bit-field structure member"
Product: gcc
Version: 7.0
Status: UNCONFIRMED
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When compiling this program:
/----------------------------------------------------------------------\
#include <stddef.h>
int main()
{
struct s { int x:2; };
typedef struct s s;
offsetof(struct { int x:2; }, x);
offsetof(struct s, x);
offsetof(s, x);
}
\----------------------------------------------------------------------/
I get the following error messages:
/----------------------------------------------------------------------\
In file included from example.c:1:0:
example.c: In function ‘main’:
example.c:8:19: error: attempt to take address of bit-field structure member
‘x’
offsetof(struct { int x:2; }, x);
^
example.c:9:19: error: attempt to take address of bit-field structure member
‘x’
offsetof(struct s, x);
^
example.c:10:3: error: attempt to take address of bit-field structure member
‘x’
offsetof(s, x);
^~~~~~~~
\----------------------------------------------------------------------/
In the first two cases it points inside the first argument while in the third
case it points to the 'offset' itself. This is inconsistent.
Perhaps it's better to point to the second argument instead? This is what clang
outputs:
/----------------------------------------------------------------------\
example.c:8:33: error: cannot compute offset of bit-field 'x'
offsetof(struct { int x:2; }, x);
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~
.../lib/clang/3.9.0/include/stddef.h:120:46: note: expanded from macro
'offsetof'
#define offsetof(t, d) __builtin_offsetof(t, d)
~~~~~~~~~~~~~~~~~~~~~~^~
example.c:8:25: note: bit-field is declared here
offsetof(struct { int x:2; }, x);
^
example.c:9:22: error: cannot compute offset of bit-field 'x'
offsetof(struct s, x);
~~~~~~~~~~~~~~~~~~~^~
.../lib/clang/3.9.0/include/stddef.h:120:46: note: expanded from macro
'offsetof'
#define offsetof(t, d) __builtin_offsetof(t, d)
~~~~~~~~~~~~~~~~~~~~~~^~
example.c:5:18: note: bit-field is declared here
struct s { int x:2; };
^
example.c:10:15: error: cannot compute offset of bit-field 'x'
offsetof(s, x);
~~~~~~~~~~~~^~
.../lib/clang/3.9.0/include/stddef.h:120:46: note: expanded from macro
'offsetof'
#define offsetof(t, d) __builtin_offsetof(t, d)
~~~~~~~~~~~~~~~~~~~~~~^~
example.c:5:18: note: bit-field is declared here
struct s { int x:2; };
^
3 errors generated.
\----------------------------------------------------------------------/
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70671
--- Comment #5 from Alexander Cherepanov <ch3root at openwall dot com> ---
Thanks. While testing the fix, found somewhat similar problem with
offsetof -- https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70730 .
>From gcc-bugs-return-522703-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 19 14:23:38 2016
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/69703] char16_t conversions broken in filesystem::path
Date: Tue, 19 Apr 2016 14:23:00 -0000
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I'm incorrectly switching endianness in codecvt_utf8<char16_t>, it's not a
problem in filesystem:
#include <codecvt>
#include <stdio.h>
int main() {
const char out[] = "abc";
char16_t in[4];
std::codecvt_utf8<char16_t> cvt;
std::mbstate_t st;
const char* no;
char16_t* ni;
cvt.in(st, out, out+3, no, in, in+3, ni);
printf("%d %d %d\n", (int)in[0], (int)in[1], (int)in[2]);
}
>From gcc-bugs-return-522704-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 19 14:34:25 2016
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Subject: [Bug target/69201] Remove UNSPEC_LOADU and UNSPEC_STOREU
Date: Tue, 19 Apr 2016 14:34:00 -0000
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--- Comment #1 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> ---
Author: hjl
Date: Tue Apr 19 14:33:36 2016
New Revision: 235209
URL: https://gcc.gnu.org/viewcvs?rev=235209&root=gcc&view=rev
Log:
Remove UNSPEC_LOADU and UNSPEC_STOREU
Since *mov<mode>_internal and <avx512>_(load|store)<mode>_mask patterns
can handle unaligned load and store, we can remove UNSPEC_LOADU and
UNSPEC_STOREU. We use function prototypes with pointer to scalar for
unaligned load/store builtin functions so that memory passed to
*mov<mode>_internal is unaligned.
gcc/
PR target/69201
* config/i386/avx512bwintrin.h (_mm512_mask_loadu_epi16): Pass
const short * to __builtin_ia32_loaddquhi512_mask.
(_mm512_maskz_loadu_epi16): Likewise.
(_mm512_mask_storeu_epi16): Pass short * to
__builtin_ia32_storedquhi512_mask.
(_mm512_mask_loadu_epi8): Pass const char * to
__builtin_ia32_loaddquqi512_mask.
(_mm512_maskz_loadu_epi8): Likewise.
(_mm512_mask_storeu_epi8): Pass char * to
__builtin_ia32_storedquqi512_mask.
* config/i386/avx512fintrin.h (_mm512_loadu_pd): Pass
const double * to __builtin_ia32_loadupd512_mask.
(_mm512_mask_loadu_pd): Likewise.
(_mm512_maskz_loadu_pd): Likewise.
(_mm512_storeu_pd): Pass double * to
__builtin_ia32_storeupd512_mask.
(_mm512_mask_storeu_pd): Likewise.
(_mm512_loadu_ps): Pass const float * to
__builtin_ia32_loadups512_mask.
(_mm512_mask_loadu_ps): Likewise.
(_mm512_maskz_loadu_ps): Likewise.
(_mm512_storeu_ps): Pass float * to
__builtin_ia32_storeups512_mask.
(_mm512_mask_storeu_ps): Likewise.
(_mm512_mask_loadu_epi64): Pass const long long * to
__builtin_ia32_loaddqudi512_mask.
(_mm512_maskz_loadu_epi64): Likewise.
(_mm512_mask_storeu_epi64): Pass long long *
to __builtin_ia32_storedqudi512_mask.
(_mm512_loadu_si512): Pass const int * to
__builtin_ia32_loaddqusi512_mask.
(_mm512_mask_loadu_epi32): Likewise.
(_mm512_maskz_loadu_epi32): Likewise.
(_mm512_storeu_si512): Pass int * to
__builtin_ia32_storedqusi512_mask.
(_mm512_mask_storeu_epi32): Likewise.
* config/i386/avx512vlbwintrin.h (_mm256_mask_storeu_epi8): Pass
char * to __builtin_ia32_storedquqi256_mask.
(_mm_mask_storeu_epi8): Likewise.
(_mm256_mask_loadu_epi16): Pass const short * to
__builtin_ia32_loaddquhi256_mask.
(_mm256_maskz_loadu_epi16): Likewise.
(_mm_mask_loadu_epi16): Pass const short * to
__builtin_ia32_loaddquhi128_mask.
(_mm_maskz_loadu_epi16): Likewise.
(_mm256_mask_loadu_epi8): Pass const char * to
__builtin_ia32_loaddquqi256_mask.
(_mm256_maskz_loadu_epi8): Likewise.
(_mm_mask_loadu_epi8): Pass const char * to
__builtin_ia32_loaddquqi128_mask.
(_mm_maskz_loadu_epi8): Likewise.
(_mm256_mask_storeu_epi16): Pass short * to.
__builtin_ia32_storedquhi256_mask.
(_mm_mask_storeu_epi16): Pass short * to.
__builtin_ia32_storedquhi128_mask.
* config/i386/avx512vlintrin.h (_mm256_mask_loadu_pd): Pass
const double * to __builtin_ia32_loadupd256_mask.
(_mm256_maskz_loadu_pd): Likewise.
(_mm_mask_loadu_pd): Pass onst double * to
__builtin_ia32_loadupd128_mask.
(_mm_maskz_loadu_pd): Likewise.
(_mm256_mask_storeu_pd): Pass double * to
__builtin_ia32_storeupd256_mask.
(_mm_mask_storeu_pd): Pass double * to
__builtin_ia32_storeupd128_mask.
(_mm256_mask_loadu_ps): Pass const float * to
__builtin_ia32_loadups256_mask.
(_mm256_maskz_loadu_ps): Likewise.
(_mm_mask_loadu_ps): Pass const float * to
__builtin_ia32_loadups128_mask.
(_mm_maskz_loadu_ps): Likewise.
(_mm256_mask_storeu_ps): Pass float * to
__builtin_ia32_storeups256_mask.
(_mm_mask_storeu_ps): ass float * to
__builtin_ia32_storeups128_mask.
(_mm256_mask_loadu_epi64): Pass const long long * to
__builtin_ia32_loaddqudi256_mask.
(_mm256_maskz_loadu_epi64): Likewise.
(_mm_mask_loadu_epi64): Pass const long long * to
__builtin_ia32_loaddqudi128_mask.
(_mm_maskz_loadu_epi64): Likewise.
(_mm256_mask_storeu_epi64): Pass long long * to
__builtin_ia32_storedqudi256_mask.
(_mm_mask_storeu_epi64): Pass long long * to
__builtin_ia32_storedqudi128_mask.
(_mm256_mask_loadu_epi32): Pass const int * to
__builtin_ia32_loaddqusi256_mask.
(_mm256_maskz_loadu_epi32): Likewise.
(_mm_mask_loadu_epi32): Pass const int * to
__builtin_ia32_loaddqusi128_mask.
(_mm_maskz_loadu_epi32): Likewise.
(_mm256_mask_storeu_epi32): Pass int * to
__builtin_ia32_storedqusi256_mask.
(_mm_mask_storeu_epi32): Pass int * to
__builtin_ia32_storedqusi128_mask.
* config/i386/i386-builtin-types.def (PCSHORT): New.
(PINT64): Likewise.
(V64QI_FTYPE_PCCHAR_V64QI_UDI): Likewise.
(V32HI_FTYPE_PCSHORT_V32HI_USI): Likewise.
(V32QI_FTYPE_PCCHAR_V32QI_USI): Likewise.
(V16SF_FTYPE_PCFLOAT_V16SF_UHI): Likewise.
(V8DF_FTYPE_PCDOUBLE_V8DF_UQI): Likewise.
(V16SI_FTYPE_PCINT_V16SI_UHI): Likewise.
(V16HI_FTYPE_PCSHORT_V16HI_UHI): Likewise.
(V16QI_FTYPE_PCCHAR_V16QI_UHI): Likewise.
(V8SF_FTYPE_PCFLOAT_V8SF_UQI): Likewise.
(V8DI_FTYPE_PCINT64_V8DI_UQI): Likewise.
(V8SI_FTYPE_PCINT_V8SI_UQI): Likewise.
(V8HI_FTYPE_PCSHORT_V8HI_UQI): Likewise.
(V4DF_FTYPE_PCDOUBLE_V4DF_UQI): Likewise.
(V4SF_FTYPE_PCFLOAT_V4SF_UQI): Likewise.
(V4DI_FTYPE_PCINT64_V4DI_UQI): Likewise.
(V4SI_FTYPE_PCINT_V4SI_UQI): Likewise.
(V2DF_FTYPE_PCDOUBLE_V2DF_UQI): Likewise.
(V2DI_FTYPE_PCINT64_V2DI_UQI): Likewise.
(VOID_FTYPE_PDOUBLE_V8DF_UQI): Likewise.
(VOID_FTYPE_PDOUBLE_V4DF_UQI): Likewise.
(VOID_FTYPE_PDOUBLE_V2DF_UQI): Likewise.
(VOID_FTYPE_PFLOAT_V16SF_UHI): Likewise.
(VOID_FTYPE_PFLOAT_V8SF_UQI): Likewise.
(VOID_FTYPE_PFLOAT_V4SF_UQI): Likewise.
(VOID_FTYPE_PINT64_V8DI_UQI): Likewise.
(VOID_FTYPE_PINT64_V4DI_UQI): Likewise.
(VOID_FTYPE_PINT64_V2DI_UQI): Likewise.
(VOID_FTYPE_PINT_V16SI_UHI): Likewise.
(VOID_FTYPE_PINT_V8SI_UHI): Likewise.
(VOID_FTYPE_PINT_V4SI_UHI): Likewise.
(VOID_FTYPE_PSHORT_V32HI_USI): Likewise.
(VOID_FTYPE_PSHORT_V16HI_UHI): Likewise.
(VOID_FTYPE_PSHORT_V8HI_UQI): Likewise.
(VOID_FTYPE_PCHAR_V64QI_UDI): Likewise.
(VOID_FTYPE_PCHAR_V32QI_USI): Likewise.
(VOID_FTYPE_PCHAR_V16QI_UHI): Likewise.
(V64QI_FTYPE_PCV64QI_V64QI_UDI): Removed.
(V32HI_FTYPE_PCV32HI_V32HI_USI): Likewise.
(V32QI_FTYPE_PCV32QI_V32QI_USI): Likewise.
(V16HI_FTYPE_PCV16HI_V16HI_UHI): Likewise.
(V16QI_FTYPE_PCV16QI_V16QI_UHI): Likewise.
(V8HI_FTYPE_PCV8HI_V8HI_UQI): Likewise.
(VOID_FTYPE_PV32HI_V32HI_USI): Likewise.
(VOID_FTYPE_PV16HI_V16HI_UHI): Likewise.
(VOID_FTYPE_PV8HI_V8HI_UQI): Likewise.
(VOID_FTYPE_PV64QI_V64QI_UDI): Likewise.
(VOID_FTYPE_PV32QI_V32QI_USI): Likewise.
(VOID_FTYPE_PV16QI_V16QI_UHI): Likewise.
* config/i386/i386.c (ix86_emit_save_reg_using_mov): Don't
use UNSPEC_STOREU.
(ix86_emit_restore_sse_regs_using_mov): Don't use UNSPEC_LOADU.
(ix86_avx256_split_vector_move_misalign): Don't use unaligned
load nor store.
(ix86_expand_vector_move_misalign): Likewise.
(bdesc_special_args): Use CODE_FOR_movvNXY_internal and pointer
to scalar function prototype for unaligned load/store builtins.
(ix86_expand_special_args_builtin): Updated.
* config/i386/sse.md (UNSPEC_LOADU): Removed.
(UNSPEC_STOREU): Likewise.
(VI_ULOADSTORE_BW_AVX512VL): Likewise.
(VI_ULOADSTORE_F_AVX512VL): Likewise.
(ssescalarsize): Handle V4TI, V2TI and V1TI.
(<sse>_loadu<ssemodesuffix><avxsizesuffix><mask_name>): Likewise.
(*<sse>_loadu<ssemodesuffix><avxsizesuffix><mask_name>): Likewise.
(<sse>_storeu<ssemodesuffix><avxsizesuffix>): Likewise.
(<avx512>_storeu<ssemodesuffix><avxsizesuffix>_mask): Likewise.
(<sse2_avx_avx512f>_loaddqu<mode><mask_name>): Likewise.
(*<sse2_avx_avx512f>_loaddqu<mode><mask_name>"): Likewise.
(sse2_avx_avx512f>_storedqu<mode>): Likewise.
(<avx512>_storedqu<mode>_mask): Likewise.
(*sse4_2_pcmpestr_unaligned): Likewise.
(*sse4_2_pcmpistr_unaligned): Likewise.
(*mov<mode>_internal): Renamed to ...
(mov<mode>_internal): This. Remove check of AVX and IAMCU on
misaligned operand. Replace vmovdqu64 with vmovdqu<ssescalarsize>.
(movsd/movhpd to movupd peephole): Don't use UNSPEC_LOADU.
(movlpd/movhpd to movupd peephole): Don't use UNSPEC_STOREU.
gcc/testsuite/
PR target/69201
* gcc.target/i386/avx256-unaligned-store-1.c (a): Make it
extern to force it misaligned.
(b): Likewise.
(c): Likewise.
(d): Likewise.
Check vmovups.*movv8sf_internal/3 instead of avx_storeups256.
Don't check `*' before movv4sf_internal.
* gcc.target/i386/avx256-unaligned-store-2.c: Check
vmovups.*movv32qi_internal/3 instead of avx_storeups256.
Don't check `*' before movv16qi_internal.
* gcc.target/i386/avx256-unaligned-store-3.c (a): Make it
extern to force it misaligned.
(b): Likewise.
(c): Likewise.
(d): Likewise.
Check vmovups.*movv4df_internal/3 instead of avx_storeupd256.
Don't check `*' before movv2df_internal.
* gcc.target/i386/avx256-unaligned-store-4.c (a): Make it
extern to force it misaligned.
(b): Likewise.
(c): Likewise.
(d): Likewise.
Check movv8sf_internal instead of avx_storeups256.
Check movups.*movv4sf_internal/3 instead of avx_storeups256.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/avx512bwintrin.h
trunk/gcc/config/i386/avx512fintrin.h
trunk/gcc/config/i386/avx512vlbwintrin.h
trunk/gcc/config/i386/avx512vlintrin.h
trunk/gcc/config/i386/i386-builtin-types.def
trunk/gcc/config/i386/i386.c
trunk/gcc/config/i386/sse.md
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.target/i386/avx256-unaligned-store-1.c
trunk/gcc/testsuite/gcc.target/i386/avx256-unaligned-store-2.c
trunk/gcc/testsuite/gcc.target/i386/avx256-unaligned-store-3.c
trunk/gcc/testsuite/gcc.target/i386/avx256-unaligned-store-4.c
>From gcc-bugs-return-522705-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 19 14:56:30 2016
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Subject: [Bug bootstrap/70704] [6 Regression] AIX bootstrap comparison failure
Date: Tue, 19 Apr 2016 14:56:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70704
--- Comment #13 from David Edelsohn <dje at gcc dot gnu.org> ---
A source tree checked out from r235040 (the same as the tarball) works. It
looks more likely that the problem is some difference between the repository
and the tarball.
>From gcc-bugs-return-522706-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 19 15:01:17 2016
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From: "ienkovich at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/70729] Loop marked with omp simd pragma is not vectorized
Date: Tue, 19 Apr 2016 15:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70729
Ilya Enkovich <ienkovich at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ienkovich at gcc dot gnu.org
--- Comment #5 from Ilya Enkovich <ienkovich at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #2)
> Index: gcc/tree-ssa-loop-im.c
> ===================================================================
> --- gcc/tree-ssa-loop-im.c (revision 235201)
> +++ gcc/tree-ssa-loop-im.c (working copy)
> @@ -2198,6 +2198,9 @@ ref_indep_loop_p (struct loop *loop, im_
> {
> gcc_checking_assert (MEM_ANALYZABLE (ref));
>
> + if (loop->safelen == INT_MAX)
> + return true;
> +
> return ref_indep_loop_p_2 (loop, ref, false);
> }
>
>
> fixes this. But better abstract loop->safelen == INT_MAX into a predicate
> in cfgloop.h.
>
I believe any nonzero value should be good enough.
>From gcc-bugs-return-522707-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 19 15:08:39 2016
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Subject: [Bug bootstrap/70704] [6 Regression] AIX bootstrap comparison failure
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--- Comment #14 from David Edelsohn <dje at gcc dot gnu.org> ---
The problem likely is due to gcc/gentype-lex.c distributed in the tarball. The
AIX systems currently use flex 2.5.3, which produces working gengtype-lex.c on
AIX.
>From gcc-bugs-return-522708-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 19 15:09:28 2016
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Subject: [Bug libstdc++/69703] char16_t conversions broken in filesystem::path
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Oh, this is PR 66855 again, but for codecvt_utf8 this time.
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Subject: [Bug bootstrap/70704] [6 Regression] AIX bootstrap comparison failure
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--- Comment #15 from David Edelsohn <dje at gcc dot gnu.org> ---
gcc-6-20160410 snapshot tarball (without gengtype-lex.c) works.
>From gcc-bugs-return-522710-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 19 16:30:04 2016
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Subject: [Bug tree-optimization/70729] Loop marked with omp simd pragma is not vectorized
Date: Tue, 19 Apr 2016 16:30:00 -0000
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--- Comment #6 from Yuri Rumyantsev <ysrumyan at gmail dot com> ---
Richard,
I did change proposed by you but it still does not help since we have
loop-carried dependency through this_4(D)->S_n:
<bb 2>:
_5 = this_4(D)->S_n;
...
<bb 4>:
pretmp_54 = this_4(D)->C2;
pretmp_57 = this_4(D)->C1;
pretmp_60 = MEM[(int * *)this_4(D) + 56B];
_20 = this_4(D)->S_n;
<bb 5>: Loop header
# i_33 = PHI <0(4), i_28(6)>
# prephitmp_56 = PHI <_5(4), _20(6)> Recurrent phi.
...
test.cpp:66:25: note: vect_is_simple_use: operand prephitmp_56
test.cpp:66:25: note: def_stmt: prephitmp_56 = PHI <_5(4), _20(6)>
test.cpp:66:25: note: type of def: unknown
test.cpp:66:25: note: Unsupported pattern.
test.cpp:66:25: note: not vectorized: unsupported use in stmt.
>From gcc-bugs-return-522711-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 19 16:53:12 2016
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Subject: [Bug c/70731] New: With -Ofast, reorder floating-point and integer operands to minimize conversions
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Bug ID: 70731
Summary: With -Ofast, reorder floating-point and integer
operands to minimize conversions
Product: gcc
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[Not sure if this goes in the 'c' component or some appropriate optimizer
component.]
Given options like -ffast-math (and specifically, probably -fassociative-math),
GCC should reorder operations with a series of floating-point and integer
operands to minimize the number of conversions.
For example, consider the following code (based loosely on a real optimization
issue observed in zopfli, see
http://roartindon.blogspot.com/2016/04/boosting-zopfli-performance.html):
double test1(int lbits, double lsym, int dbits, double dsym)
{
return lsym + lbits + dsym + dbits;
}
double test2(int lbits, double lsym, int dbits, double dsym)
{
return lbits + dbits + lsym + dsym;
}
gcc on x86-64, with either -O3 or -Ofast, produces two cvtsi2sd instructions
for the first, and just one cvtsi2sd for the second. (-Ofast does simplify
some of the surrounding instructions, but not the conversion.) Given
-fassociative-math, implied by -ffast-math and thus by -Ofast, I think GCC
could reorder the additions in test1 to only do one conversion.
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Subject: [Bug libitm/70456] GTM::gtm_thread::operator new should properly allocate aligned memory
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--- Comment #1 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> ---
Author: hjl
Date: Tue Apr 19 17:01:11 2016
New Revision: 235211
URL: https://gcc.gnu.org/viewcvs?rev=235211&root=gcc&view=rev
Log:
Allocate memory on cache line if requested
Since GTM::gtm_thread has
gtm_thread *next_thread __attribute__((__aligned__(HW_CACHELINE_SIZE)));
GTM::gtm_thread::operator new () calls xmalloc with separate_cl == true.
xmalloc must return memory on cache line in this case.
PR libitm/70456
* util.cc (xmalloc): Use posix_memalign to allocate memory on
on cache line if requested.
Modified:
trunk/libitm/ChangeLog
trunk/libitm/util.cc
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Subject: [Bug libitm/70456] GTM::gtm_thread::operator new should properly allocate aligned memory
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |7.0
--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> ---
Fixed for GCC 7.
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Subject: [Bug bootstrap/70704] [6 Regression] AIX bootstrap comparison failure
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--- Comment #16 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
So, what is the diff in between a working and non-working gengtype-lex.c ?
I don't have access right now to the WS I've built the RC1 on (travelling), but
guess it is 2.5.37.
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Subject: [Bug bootstrap/70704] [6 Regression] AIX bootstrap comparison failure
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--- Comment #17 from David Edelsohn <dje at gcc dot gnu.org> ---
Yes, WS1 is Flex 2.5.37. I will upload both. There are many differences.
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--- Comment #18 from David Edelsohn <dje at gcc dot gnu.org> ---
Created attachment 38310
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gengtype-lex.c distributed in GCC-6.0.1-RC1
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--- Comment #19 from David Edelsohn <dje at gcc dot gnu.org> ---
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gengtype-lex.c generated on AIX
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Subject: [Bug bootstrap/70704] [6 Regression] AIX bootstrap comparison failure
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--- Comment #20 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
So lots of macro/code formatting and other minor changes, function names
changed etc., but the actual table content looks the same to me. But the
amount of changes is huge.
Perhaps try some flex versions in between (~2.5.18 or so) etc., so that we
narrow it down a little bit more?
Does it matter whether gengtype-lex.c is built with or without optimizations?
Say, diff the various gengtype created gt*.h headers between versions where
gengtype-lex.c is from flex 2.5.3 (I'd expect that both stage1 and stage2 gt*.h
are identical then) and when built with flex 2.5.37 (do those gt*.h headers at
stage1, stage2 actually match the flex 2.5.3 built ones)?
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--- Comment #21 from David Edelsohn <dje at gcc dot gnu.org> ---
The recent flex adds a number of its own C int type definitions and ranges.
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--- Comment #22 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I see flex 2.6 has been released (already in November last year), does that
help?
I could do the final release and/or rc2 with flex 2.6 instead of flex 2.5.37...
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Subject: [Bug libstdc++/69703] char16_t conversions broken in filesystem::path
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Tue Apr 19 18:02:46 2016
New Revision: 235216
URL: https://gcc.gnu.org/viewcvs?rev=235216&root=gcc&view=rev
Log:
libstdc++/69703 ignore endianness in codecvt_utf8
PR libstdc++/69703
* src/c++11/codecvt.cc (__codecvt_utf8_base<char16_t>::do_in)):
Override endianness bit in mode.
* testsuite/22_locale/codecvt/codecvt_utf8/69703.cc: New test.
* testsuite/22_locale/codecvt/codecvt_utf8_utf16/66855.cc: Test
that little_endian mode is ignored.
* testsuite/experimental/filesystem/path/native/string.cc: New test.
Added:
trunk/libstdc++-v3/testsuite/22_locale/codecvt/codecvt_utf8/69703.cc
trunk/libstdc++-v3/testsuite/experimental/filesystem/path/native/
trunk/libstdc++-v3/testsuite/experimental/filesystem/path/native/string.cc
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/src/c++11/codecvt.cc
trunk/libstdc++-v3/testsuite/22_locale/codecvt/codecvt_utf8_utf16/66855.cc
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Subject: [Bug libstdc++/70609] std::experimental::filesystem::copy fails if the file size is 0 bytes
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Tue Apr 19 18:02:39 2016
New Revision: 235215
URL: https://gcc.gnu.org/viewcvs?rev=235215&root=gcc&view=rev
Log:
libstdc++/70609 fix filesystem::copy()
PR libstdc++/70609
* src/filesystem/ops.cc (close_fd): New function.
(do_copy_file): Set permissions before copying file contents. Check
result of closing file descriptors. Don't copy streambuf when file
is empty.
(copy(const path&, const path&, copy_options, error_code&)): Use
lstat for source file when copy_symlinks is set.
* testsuite/experimental/filesystem/operations/copy.cc: Test copy().
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/src/filesystem/ops.cc
trunk/libstdc++-v3/testsuite/experimental/filesystem/operations/copy.cc
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--- Comment #23 from David Edelsohn <dje at gcc dot gnu.org> ---
Older releases of Flex are no longer available as source code. Flex now is
distributed through sourceforge, not gnu.org. Newer releases of Flex don't
build on AIX.
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Fixed on trunk so far.
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--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Fixed on trunk so far.
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Subject: [Bug bootstrap/70704] [6 Regression] AIX bootstrap comparison failure
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--- Comment #24 from David Edelsohn <dje at gcc dot gnu.org> ---
Actually, I finally was able to convince Flex 2.6.0 to build. I'll try with
that.
>From gcc-bugs-return-522727-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 19 18:48:47 2016
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Subject: [Bug tree-optimization/70731] With -Ofast, reorder floating-point and integer operands to minimize conversions
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--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
That... seems dangerous to me. With floats, unsafe operations tend to change
the low bits. With integers, an overflow gets the high bits wrong. If you call
test(INT_MAX,0,1,0) for instance, the result would be quite different between
the 2 functions...
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Subject: [Bug c++/68206] ICE: unimplemented: unexpected AST of kind loop_expr in potential_constant_expression_1
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--- Comment #1 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Tue Apr 19 18:49:54 2016
New Revision: 235217
URL: https://gcc.gnu.org/viewcvs?rev=235217&root=gcc&view=rev
Log:
PR c++/68206 - Fix constexpr diagnostics with loops.
PR c++/68530
* constexpr.c (potential_constant_expression_1): Handle LOOP_EXPR
and GOTO_EXPR.
Added:
trunk/gcc/testsuite/g++.dg/cpp1y/constexpr-loop5.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/constexpr.c
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Subject: [Bug c++/68530] [C++14] sorry, unimplemented: unexpected AST of kind loop_expr
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--- Comment #1 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Tue Apr 19 18:49:54 2016
New Revision: 235217
URL: https://gcc.gnu.org/viewcvs?rev=235217&root=gcc&view=rev
Log:
PR c++/68206 - Fix constexpr diagnostics with loops.
PR c++/68530
* constexpr.c (potential_constant_expression_1): Handle LOOP_EXPR
and GOTO_EXPR.
Added:
trunk/gcc/testsuite/g++.dg/cpp1y/constexpr-loop5.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/constexpr.c
>From gcc-bugs-return-522730-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 19 18:58:40 2016
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Subject: [Bug target/69979] ARM naked function attribute not handling structs bigger than 32 bits correctly
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Cory Snider <cory at pebble dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |cory at pebble dot com
--- Comment #3 from Cory Snider <cory at pebble dot com> ---
Created attachment 38312
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38312&action=edit
Modified gcc.target/arm/naked-1.c testcase
The testcase gcc.target/arm/naked-1.c in the GCC test suite
(https://gcc.gnu.org/viewcvs/gcc/trunk/gcc/testsuite/gcc.target/arm/naked-1.c?view=markup)
contains the following comment:
> /* Check that function arguments aren't assigned and copied to stack slots
> in naked functions. This usually happens at -O0 (presumably for
> better debugging), but is highly undesirable if we haven't created
> a stack frame. */
Modifying this testcase so that the function accepts a struct argument results
in the compiler emitting an instruction sequence to copy function arguments to
the caller's stack frame.
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Subject: [Bug tree-optimization/70731] With -Ofast, reorder floating-point and integer operands to minimize conversions
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--- Comment #2 from Josh Triplett <josh at joshtriplett dot org> ---
(In reply to Marc Glisse from comment #1)
> That... seems dangerous to me. With floats, unsafe operations tend to change
> the low bits. With integers, an overflow gets the high bits wrong. If you
> call test(INT_MAX,0,1,0) for instance, the result would be quite different
> between the 2 functions...
That's a fair point. Perhaps it should go into a separate optimization option,
then, though it still seems in the spirit of -Ofast. (If overflow is a
concern, the application would hopefully be checking for that separately; GCC
also already has various optimizations that assume overflow cannot occur.)
>From gcc-bugs-return-522732-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 19 19:03:07 2016
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Subject: [Bug bootstrap/70704] [6 Regression] AIX bootstrap comparison failure
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--- Comment #25 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Looking at the history of flex, flex 2.5.3 is something pre-1997, then there
used to be 2.5.4 and 2.5.4a, and at least RHL updated from the 2.5.4a to 2.5.33
early in 2007, so the question is if there has actually been any official flex
releases between 2.5.4a and 2.5.33. I can find tarball with 2.5.33 around,
finding something older is already getting harder.
>From gcc-bugs-return-522733-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 19 19:10:43 2016
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Subject: [Bug bootstrap/70704] [6 Regression] AIX bootstrap comparison failure
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--- Comment #26 from David Edelsohn <dje at gcc dot gnu.org> ---
After some more tests, I don't believe that flex is the culprit. I removed
gengtype-lex.c from GCC-6.0.1-RC and allowed the flex to rebuild it, but the
build still failed with the miscompare.
The problem remains that r235040 works and the tarball does not.
>From gcc-bugs-return-522734-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 19 19:25:15 2016
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Subject: [Bug libfortran/70684] [4.9/5/6/7 Regression] incorrect reading of values from file on Windows
Date: Tue, 19 Apr 2016 19:25:00 -0000
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--- Comment #8 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Author: jvdelisle
Date: Tue Apr 19 19:24:28 2016
New Revision: 235220
URL: https://gcc.gnu.org/viewcvs?rev=235220&root=gcc&view=rev
Log:
2016-04-19 Jerry DeLisle <jvdelisle@gcc.gnu.org>
PR libgfortran/70684
* io/list_read (check_buffers): Add '\r' to check for end of line.
factor.
* gfortran.dg/list_read_14.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/list_read_14.f90
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/libgfortran/ChangeLog
trunk/libgfortran/io/list_read.c
>From gcc-bugs-return-522735-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 19 19:31:08 2016
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Subject: [Bug c++/66543] False positive warning "variable set but not used"
Date: Tue, 19 Apr 2016 19:31:00 -0000
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--- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Tue Apr 19 19:30:22 2016
New Revision: 235221
URL: https://gcc.gnu.org/viewcvs?rev=235221&root=gcc&view=rev
Log:
PR c++/66543 - -Wunused-but-set* false positives
* expr.c (mark_exp_read): Handle NON_DEPENDENT_EXPR.
* pt.c (make_pack_expansion): Call mark_exp_read.
* semantics.c (finish_id_expression): Call mark_type_use in
unevaluated context.
Added:
trunk/gcc/testsuite/g++.dg/warn/Wunused-parm-7.C
trunk/gcc/testsuite/g++.dg/warn/Wunused-parm-8.C
trunk/gcc/testsuite/g++.dg/warn/Wunused-var-24.C
trunk/gcc/testsuite/g++.dg/warn/Wunused-var-25.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/expr.c
trunk/gcc/cp/pt.c
trunk/gcc/cp/semantics.c
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Subject: [Bug bootstrap/70704] [6 Regression] AIX bootstrap comparison failure
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--- Comment #27 from David Edelsohn <dje at gcc dot gnu.org> ---
I performed a recursive diff of r235040 vs gcc-6.0.1-rc-20160415. Other than
.svn directories, the only differences are:
Only in gcc6rc/INSTALL: binaries.html
Only in gcc6rc/INSTALL: build.html
Only in gcc6rc/INSTALL: configure.html
Only in gcc6rc/INSTALL: download.html
Only in gcc6rc/INSTALL: finalinstall.html
Only in gcc6rc/INSTALL: gfdl.html
Only in gcc6rc/INSTALL: index.html
Only in gcc6rc/INSTALL: old.html
Only in gcc6rc/INSTALL: prerequisites.html
Only in gcc6rc/INSTALL: specific.html
Only in gcc6rc/INSTALL: test.html
diff -r gcc6rc/LAST_UPDATED gcc-6-branch/LAST_UPDATED
1c1,2
< Obtained from SVN: branches/gcc-6-branch revision 235040
---
> Tue Apr 19 15:12:18 EDT 2016
> Tue Apr 19 19:12:18 UTC 2016 (revision 235040)
Only in gcc6rc: MD5SUMS
Only in gcc6rc: NEWS
Only in gcc-6-branch/gcc: REVISION
Only in gcc6rc/gcc/doc: aot-compile.1
Only in gcc6rc/gcc/doc: cpp.1
Only in gcc6rc/gcc/doc: cpp.info
Only in gcc6rc/gcc/doc: cppinternals.info
Only in gcc6rc/gcc/doc: fsf-funding.7
Only in gcc6rc/gcc/doc: g++.1
Only in gcc6rc/gcc/doc: gc-analyze.1
Only in gcc6rc/gcc/doc: gcc.1
Only in gcc6rc/gcc/doc: gcc.info
Only in gcc6rc/gcc/doc: gccinstall.info
Only in gcc6rc/gcc/doc: gccint.info
Only in gcc6rc/gcc/doc: gcj-dbtool.1
Only in gcc6rc/gcc/doc: gcj.1
Only in gcc6rc/gcc/doc: gcj.info
Only in gcc6rc/gcc/doc: gcov-tool.1
Only in gcc6rc/gcc/doc: gcov.1
Only in gcc6rc/gcc/doc: gfdl.7
Only in gcc6rc/gcc/doc: gfortran.1
Only in gcc6rc/gcc/doc: gij.1
Only in gcc6rc/gcc/doc: gpl.7
Only in gcc6rc/gcc/doc: grmic.1
Only in gcc6rc/gcc/doc: jcf-dump.1
Only in gcc6rc/gcc/doc: jv-convert.1
Only in gcc6rc/gcc/doc: rebuild-gcj-db.1
Only in gcc6rc/gcc/fortran: gfortran.info
Only in gcc6rc/gcc: gengtype-lex.c
Only in gcc6rc/gcc/po: be.gmo
Only in gcc6rc/gcc/po: da.gmo
Only in gcc6rc/gcc/po: de.gmo
Only in gcc6rc/gcc/po: el.gmo
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Only in gcc6rc/gcc/po: fi.gmo
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Only in gcc6rc/gcc/po: nl.gmo
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Only in gcc6rc/libjava/classpath/doc: gorbd.1
Only in gcc6rc/libjava/classpath/doc: grmid.1
Only in gcc6rc/libjava/classpath/doc: grmiregistry.1
Only in gcc6rc/libjava/classpath/doc: gserialver.1
Only in gcc6rc/libjava/classpath/doc: gtnameserv.1
Only in gcc6rc/libquadmath: libquadmath.info
>From gcc-bugs-return-522737-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 19 19:32:35 2016
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From: "glisse at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/70731] With -Ofast, reorder floating-point and integer operands to minimize conversions
Date: Tue, 19 Apr 2016 19:32:00 -0000
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--- Comment #3 from Marc Glisse <glisse at gcc dot gnu.org> ---
(In reply to Josh Triplett from comment #2)
> That's a fair point. Perhaps it should go into a separate optimization
> option, then, though it still seems in the spirit of -Ofast. (If overflow
> is a concern, the application would hopefully be checking for that
> separately; GCC also already has various optimizations that assume overflow
> cannot occur.)
The code might look like:
return (double)lsym + lbits + dsym + (double)dbits;
(we don't see the difference)
that is, the application is very explicitly using double, precisely to avoid
integer overflow issues.
Assuming that no overflow happens in test2 is normal, it is guaranteed by the
standard. Assuming that with test1 the integers are small enough that if we
reorder things no overflow will happen... Well maybe someone else will be more
optimistic than I am. Maybe if you could restrict it to the case where VRP
information guarantees that there is no overflow? That might be rare enough
that it won't matter to you though :-(
>From gcc-bugs-return-522738-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 19 19:40:03 2016
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Subject: [Bug tree-optimization/70731] With -Ofast, reorder floating-point and integer operands to minimize conversions
Date: Tue, 19 Apr 2016 19:40:00 -0000
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--- Comment #4 from Josh Triplett <josh at joshtriplett dot org> ---
(In reply to Marc Glisse from comment #3)
> (In reply to Josh Triplett from comment #2)
> > That's a fair point. Perhaps it should go into a separate optimization
> > option, then, though it still seems in the spirit of -Ofast. (If overflow
> > is a concern, the application would hopefully be checking for that
> > separately; GCC also already has various optimizations that assume overflow
> > cannot occur.)
>
> The code might look like:
> return (double)lsym + lbits + dsym + (double)dbits;
> (we don't see the difference)
> that is, the application is very explicitly using double, precisely to avoid
> integer overflow issues.
>
> Assuming that no overflow happens in test2 is normal, it is guaranteed by
> the standard. Assuming that with test1 the integers are small enough that if
> we reorder things no overflow will happen... Well maybe someone else will be
> more optimistic than I am. Maybe if you could restrict it to the case where
> VRP information guarantees that there is no overflow? That might be rare
> enough that it won't matter to you though :-(
In cases where GCC can *guarantee* no overflow, it can optimize those by
default.
However, I think it's worth having an optimization option that allows GCC to do
this even when not guaranteed. Or, at a minimum, perhaps GCC could notice
cases where such reordering would reduce conversions, and have a warning option
to flag them?
>From gcc-bugs-return-522739-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 19 20:02:52 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70732] New: Operator new is unable to throw std::bad_alloc() when memory is exhausted in statically linked executable
Date: Tue, 19 Apr 2016 20:02:00 -0000
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Bug ID: 70732
Summary: Operator new is unable to throw std::bad_alloc() when
memory is exhausted in statically linked executable
Product: gcc
Version: 5.3.0
Status: UNCONFIRMED
Severity: major
Priority: P3
Component: c++
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Created attachment 38313
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38313&action=edit
*.ii file
When there is no more memory available for the program and operator new is
called, then it is unable to throw an exception - it unsuccessfully tries
several times (a couple of thousands) to allocate memory for the exception. And
finally, the exception is thrown. The problem is that memory for the exception
is tried to be allocated too many times, but only if the program is statically
linked. I have done some research and found that numerous allocation attempts
come from function _Unwind_RaiseException(). To see unsuccessful allocation
attempts, use command Strace. And one more thing I tested this program on GCC
4.6.4, 4.7.3, 4.8.5, 4.9.3, 5.3.0 and only on version 4.6.3 number of calls to
brk(2) and mmap2() was normal (no more than 100).
Here is code which is supossed to trigger the problem:
#include <sys/resource.h>
void foo(int k) {
const int size1 = 64;
const int size2 = 256;
volatile int t[size1];
// new[] should throw an exception as soon as memory is exhausted
int volatile* p = new int[size2];
t[size1 - 1] = p[size2 - 1] = ++k; // prevent compiler from erasing t
and p
foo(++k);
}
int main() {
// Set low memory limit
struct rlimit limit;
limit.rlim_cur = limit.rlim_max = 10 << 20;
if (setrlimit(RLIMIT_AS, &limit))
return 1;
if (setrlimit(RLIMIT_STACK, &limit))
return 2;
foo(0);
return 0;
}
///////////////////////////////////////////////////
Compilation command and output:
$ g++-5 -v -save-temps -static re.cpp -o r -m32 -O2
Using built-in specs.
COLLECT_GCC=g++-5
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/5/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu
5.3.0-3ubuntu1~14.04' --with-bugurl=file:///usr/share/doc/gcc-5/README.Bugs
--enable-languages=c,ada,c++,java,go,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-5 --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=gcc4-compatible --disable-libstdcxx-dual-abi
--enable-gnu-unique-object --disable-vtable-verify --enable-libmpx
--enable-plugin --with-system-zlib --disable-browser-plugin
--enable-java-awt=gtk --enable-gtk-cairo
--with-java-home=/usr/lib/jvm/java-1.5.0-gcj-5-amd64/jre --enable-java-home
--with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-5-amd64
--with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-5-amd64
--with-arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar
--enable-objc-gc --enable-multiarch --disable-werror --with-arch-32=i686
--with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib
--with-tune=generic --enable-checking=release --build=x86_64-linux-gnu
--host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 5.3.0 20151204 (Ubuntu 5.3.0-3ubuntu1~14.04)
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-static' '-o' 'r' '-m32' '-O2'
'-mtune=generic' '-march=i686'
/usr/lib/gcc/x86_64-linux-gnu/5/cc1plus -E -quiet -v -imultilib 32 -imultiarch
i386-linux-gnu -D_GNU_SOURCE re.cpp -m32 -mtune=generic -march=i686 -O2
-fpch-preprocess -fstack-protector -Wformat -Wformat-security -o re.ii
ignoring nonexistent directory
"/usr/lib/gcc/x86_64-linux-gnu/5/../../../../include/i386-linux-gnu/c++/5"
ignoring nonexistent directory "/usr/local/include/i386-linux-gnu"
ignoring nonexistent directory
"/usr/lib/gcc/x86_64-linux-gnu/5/../../../../x86_64-linux-gnu/include"
ignoring nonexistent directory "/usr/include/i386-linux-gnu"
#include "..." search starts here:
#include <...> search starts here:
/usr/include/c++/5
/usr/include/x86_64-linux-gnu/c++/5/32
/usr/include/c++/5/backward
/usr/lib/gcc/x86_64-linux-gnu/5/include
/usr/local/include
/usr/lib/gcc/x86_64-linux-gnu/5/include-fixed
/usr/include
End of search list.
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-static' '-o' 'r' '-m32' '-O2'
'-mtune=generic' '-march=i686'
/usr/lib/gcc/x86_64-linux-gnu/5/cc1plus -fpreprocessed re.ii -quiet -dumpbase
re.cpp -m32 -mtune=generic -march=i686 -auxbase re -O2 -version
-fstack-protector -Wformat -Wformat-security -o re.s
GNU C++ (Ubuntu 5.3.0-3ubuntu1~14.04) version 5.3.0 20151204 (x86_64-linux-gnu)
compiled by GNU C version 5.3.0 20151204, GMP version 5.1.3, MPFR
version 3.1.3, MPC version 1.0.1
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU C++ (Ubuntu 5.3.0-3ubuntu1~14.04) version 5.3.0 20151204 (x86_64-linux-gnu)
compiled by GNU C version 5.3.0 20151204, GMP version 5.1.3, MPFR
version 3.1.3, MPC version 1.0.1
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: bbf79e63f589fea28823afe8bbe74c79
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-static' '-o' 'r' '-m32' '-O2'
'-mtune=generic' '-march=i686'
as -v --32 -o re.o re.s
GNU assembler version 2.24 (x86_64-linux-gnu) using BFD version (GNU Binutils
for Ubuntu) 2.24
COMPILER_PATH=/usr/lib/gcc/x86_64-linux-gnu/5/:/usr/lib/gcc/x86_64-linux-gnu/5/:/usr/lib/gcc/x86_64-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/5/:/usr/lib/gcc/x86_64-linux-gnu/
LIBRARY_PATH=/usr/lib/gcc/x86_64-linux-gnu/5/32/:/usr/lib/gcc/x86_64-linux-gnu/5/../../../i386-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/5/../../../../lib32/:/lib/i386-linux-gnu/:/lib/../lib32/:/usr/lib/i386-linux-gnu/:/usr/lib/../lib32/:/usr/lib/gcc/x86_64-linux-gnu/5/:/usr/lib/gcc/x86_64-linux-gnu/5/../../../i386-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/5/../../../:/lib/i386-linux-gnu/:/lib/:/usr/lib/i386-linux-gnu/:/usr/lib/
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-static' '-o' 'r' '-m32' '-O2'
'-mtune=generic' '-march=i686'
/usr/lib/gcc/x86_64-linux-gnu/5/collect2 -plugin
/usr/lib/gcc/x86_64-linux-gnu/5/liblto_plugin.so
-plugin-opt=/usr/lib/gcc/x86_64-linux-gnu/5/lto-wrapper
-plugin-opt=-fresolution=re.res -plugin-opt=-pass-through=-lgcc
-plugin-opt=-pass-through=-lgcc_eh -plugin-opt=-pass-through=-lc --sysroot=/
--build-id -m elf_i386 --hash-style=gnu --as-needed -static -z relro -o r
/usr/lib/gcc/x86_64-linux-gnu/5/../../../../lib32/crt1.o
/usr/lib/gcc/x86_64-linux-gnu/5/../../../../lib32/crti.o
/usr/lib/gcc/x86_64-linux-gnu/5/32/crtbeginT.o
-L/usr/lib/gcc/x86_64-linux-gnu/5/32
-L/usr/lib/gcc/x86_64-linux-gnu/5/../../../i386-linux-gnu
-L/usr/lib/gcc/x86_64-linux-gnu/5/../../../../lib32 -L/lib/i386-linux-gnu
-L/lib/../lib32 -L/usr/lib/i386-linux-gnu -L/usr/lib/../lib32
-L/usr/lib/gcc/x86_64-linux-gnu/5
-L/usr/lib/gcc/x86_64-linux-gnu/5/../../../i386-linux-gnu
-L/usr/lib/gcc/x86_64-linux-gnu/5/../../.. -L/lib/i386-linux-gnu
-L/usr/lib/i386-linux-gnu re.o -lstdc++ -lm --start-group -lgcc -lgcc_eh -lc
--end-group /usr/lib/gcc/x86_64-linux-gnu/5/32/crtend.o
/usr/lib/gcc/x86_64-linux-gnu/5/../../../../lib32/crtn.o
////////////////////////////////////////////////////////////////////////////////////
Strace prints something like that (many, many times):
...
brk(0x8cd8000) = 0x8cb7000
mmap2(NULL, 1048576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
-1 ENOMEM (Cannot allocate memory)
mmap2(NULL, 2097152, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_NORESERVE, -1, 0)
= -1 ENOMEM (Cannot allocate memory)
mmap2(NULL, 1048576, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_NORESERVE, -1, 0)
= -1 ENOMEM (Cannot allocate memory)
mmap2(NULL, 2097152, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_NORESERVE, -1, 0)
= -1 ENOMEM (Cannot allocate memory)
mmap2(NULL, 1048576, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_NORESERVE, -1, 0)
= -1 ENOMEM (Cannot allocate memory)
brk(0x8cd8000) = 0x8cb7000
mmap2(NULL, 1048576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
-1 ENOMEM (Cannot allocate memory)
mmap2(NULL, 2097152, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_NORESERVE, -1, 0)
= -1 ENOMEM (Cannot allocate memory)
mmap2(NULL, 1048576, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_NORESERVE, -1, 0)
= -1 ENOMEM (Cannot allocate memory)
mmap2(NULL, 2097152, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_NORESERVE, -1, 0)
= -1 ENOMEM (Cannot allocate memory)
mmap2(NULL, 1048576, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_NORESERVE, -1, 0)
= -1 ENOMEM (Cannot allocate memory)
brk(0x8cd8000) = 0x8cb7000
mmap2(NULL, 1048576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
-1 ENOMEM (Cannot allocate memory)
mmap2(NULL, 2097152, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_NORESERVE, -1, 0)
= -1 ENOMEM (Cannot allocate memory)
mmap2(NULL, 1048576, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_NORESERVE, -1, 0)
= -1 ENOMEM (Cannot allocate memory)
mmap2(NULL, 2097152, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_NORESERVE, -1, 0)
= -1 ENOMEM (Cannot allocate memory)
mmap2(NULL, 1048576, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_NORESERVE, -1, 0)
= -1 ENOMEM (Cannot allocate memory)
brk(0x8cd8000) = 0x8cb7000
mmap2(NULL, 1048576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
-1 ENOMEM (Cannot allocate memory)
mmap2(NULL, 2097152, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_NORESERVE, -1, 0)
= -1 ENOMEM (Cannot allocate memory)
mmap2(NULL, 1048576, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_NORESERVE, -1, 0)
= -1 ENOMEM (Cannot allocate memory)
mmap2(NULL, 2097152, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_NORESERVE, -1, 0)
= -1 ENOMEM (Cannot allocate memory)
mmap2(NULL, 1048576, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_NORESERVE, -1, 0)
= -1 ENOMEM (Cannot allocate memory)
...
/////////////////////////////////////////////////////////////////////////
System information:
$ uname -a
Linux quasar-HP 3.16.0-70-generic #90~14.04.1-Ubuntu SMP Wed Apr 6 22:56:34 UTC
2016 x86_64 x86_64 x86_64 GNU/Linux
>From gcc-bugs-return-522740-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 19 21:18:37 2016
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From: "dje at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/70704] [6 Regression] AIX bootstrap comparison failure
Date: Tue, 19 Apr 2016 21:18:00 -0000
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--- Comment #28 from David Edelsohn <dje at gcc dot gnu.org> ---
I copied gcc/REVISION to the release candidate to remove one additional
difference and tried bootstrap, but it still failed.
>From gcc-bugs-return-522741-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 19 23:13:52 2016
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From: "manu at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/70730] Inconsistent column number in "error: attempt to take address of bit-field structure member"
Date: Tue, 19 Apr 2016 23:13:00 -0000
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic, easyhack
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-19
CC| |manu at gcc dot gnu.org
Depends on| |43486
Ever confirmed|0 |1
--- Comment #1 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
manu@localhost:~/gcc/gcc/c-family$ grep -C 3 "attempt to take address of" *.c
c-common.c- t = TREE_OPERAND (expr, 1);
c-common.c- if (DECL_C_BIT_FIELD (t))
c-common.c- {
c-common.c: error ("attempt to take address of bit-field structure "
c-common.c- "member %qD", t);
c-common.c- return error_mark_node;
c-common.c- }
error() uses "input_location" and that may point to anything. You need to use
error_at(), with the proper location of the second operand. (I'm not sure if
the second operand always have a proper location. If not, this then depends on
PR43486)
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=43486
[Bug 43486] Preserve variable-use locations
>From gcc-bugs-return-522742-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 00:47:28 2016
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Subject: [Bug testsuite/70719] the libjava testsuite does not work with dejagnu 1.6
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Ben Elliston <bje at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |bje at gcc dot gnu.org
Resolution|--- |FIXED
--- Comment #1 from Ben Elliston <bje at gcc dot gnu.org> ---
Fixed with:
PR testsuite/70719
* testsuite/lib/libjava.exp (libjava_arguments): Use 'file
normalize' rather than the defunct DejaGnu 'absolute' proc.
>From gcc-bugs-return-522743-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 01:43:10 2016
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Subject: [Bug middle-end/70680] [5/6/7 Regression] OpenMP SIMD linear variable privatized too eagerly
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Apr 20 01:42:24 2016
New Revision: 235232
URL: https://gcc.gnu.org/viewcvs?rev=235232&root=gcc&view=rev
Log:
PR middle-end/70680
* gimplify.c (gimplify_omp_for): Call omp_notice_variable for
implicitly linear or lastprivate iterator on the outer context.
* testsuite/libgomp.c/pr70680-1.c: New test.
* testsuite/libgomp.c/pr70680-2.c: New test.
Added:
trunk/libgomp/testsuite/libgomp.c/pr70680-1.c
trunk/libgomp/testsuite/libgomp.c/pr70680-2.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gimplify.c
trunk/libgomp/ChangeLog
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/70680] [5/6 Regression] OpenMP SIMD linear variable privatized too eagerly
Date: Wed, 20 Apr 2016 01:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70680
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[5/6/7 Regression] OpenMP |[5/6 Regression] OpenMP
|SIMD linear variable |SIMD linear variable
|privatized too eagerly |privatized too eagerly
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed on the trunk so far.
>From gcc-bugs-return-522745-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 07:10:27 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70674] [4.9/5/6/7 regression] S/390: Memory access below stack pointer in epilogue
Date: Wed, 20 Apr 2016 07:10:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70674
--- Comment #2 from Andreas Krebbel <krebbel at gcc dot gnu.org> ---
Author: krebbel
Date: Wed Apr 20 07:09:32 2016
New Revision: 235233
URL: https://gcc.gnu.org/viewcvs?rev=235233&root=gcc&view=rev
Log:
PR70674: S/390: Add memory barrier to stack pointer restore from fpr.
This patches fixes a problem with stack variable accesses being
scheduled after the stack pointer restore instructions. In the
testcase this happened with the stack variable 'a' accessed through the
frame pointer.
The existing stack_tie we have in the backend is basically useless
when trying to block stack variable accesses from being scheduled
across an insn. The alias set of stack variables and the frame alias
set usually differ and hence aren't in conflict with each other. The
solution appears to be a magic MEM term with a scratch register which
is handled as a full memory barrier when analyzing scheduling
dependencies.
With the patch a (clobber (mem:BLK (scratch))) is being added to the
restore instruction in order to prevent any memory operations to be
scheduled across the insn. The patch does that only for the one case
where the stack pointer is restored from an FPR. Theoretically this
might happen also in the case where the stack pointer gets restored
using a load multiple. However, triggering that problem with
load-multiple appears to be much harder since the load-multiple will
restore the frame pointer as well. So in order to see the problem a
different call-clobbered register would need to be used as temporary
stack pointer.
Another case which needs to be handled some day is the stack pointer
allocation part. It needs to be a memory barrier as well.
Bootstrapped and regression tested with --with-arch z196 and z13 on
s390 and s390x.
gcc/ChangeLog:
2016-04-20 Andreas Krebbel <krebbel@linux.vnet.ibm.com>
Backport from mainline
2016-04-20 Andreas Krebbel <krebbel@linux.vnet.ibm.com>
PR target/70674
* config/s390/s390.c (s390_restore_gprs_from_fprs): Pick the new
stack_restore_from_fpr pattern when restoring r15.
(s390_optimize_prologue): Strip away the memory barrier in the
parallel when trying to get rid of restore insns.
* config/s390/s390.md ("stack_restore_from_fpr"): New insn
definition for loading the stack pointer from an FPR. Compared to
the normal move insn this pattern includes a full memory barrier.
gcc/testsuite/ChangeLog:
2016-04-20 Andreas Krebbel <krebbel@linux.vnet.ibm.com>
Backport from mainline
2016-04-20 Andreas Krebbel <krebbel@linux.vnet.ibm.com>
PR target/70674
* gcc.target/s390/pr70674.c: New test.
Added:
branches/gcc-5-branch/gcc/testsuite/gcc.target/s390/pr70674.c
Modified:
branches/gcc-5-branch/gcc/ChangeLog
branches/gcc-5-branch/gcc/config/s390/s390.c
branches/gcc-5-branch/gcc/config/s390/s390.md
branches/gcc-5-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-522746-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 07:14:09 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70674] [4.9/5/6/7 regression] S/390: Memory access below stack pointer in epilogue
Date: Wed, 20 Apr 2016 07:14:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70674
--- Comment #3 from Andreas Krebbel <krebbel at gcc dot gnu.org> ---
Author: krebbel
Date: Wed Apr 20 07:13:23 2016
New Revision: 235234
URL: https://gcc.gnu.org/viewcvs?rev=235234&root=gcc&view=rev
Log:
PR70674: S/390: Add memory barrier to stack pointer restore from fpr.
This patches fixes a problem with stack variable accesses being
scheduled after the stack pointer restore instructions. In the
testcase this happened with the stack variable 'a' accessed through the
frame pointer.
The existing stack_tie we have in the backend is basically useless
when trying to block stack variable accesses from being scheduled
across an insn. The alias set of stack variables and the frame alias
set usually differ and hence aren't in conflict with each other. The
solution appears to be a magic MEM term with a scratch register which
is handled as a full memory barrier when analyzing scheduling
dependencies.
With the patch a (clobber (mem:BLK (scratch))) is being added to the
restore instruction in order to prevent any memory operations to be
scheduled across the insn. The patch does that only for the one case
where the stack pointer is restored from an FPR. Theoretically this
might happen also in the case where the stack pointer gets restored
using a load multiple. However, triggering that problem with
load-multiple appears to be much harder since the load-multiple will
restore the frame pointer as well. So in order to see the problem a
different call-clobbered register would need to be used as temporary
stack pointer.
Another case which needs to be handled some day is the stack pointer
allocation part. It needs to be a memory barrier as well.
Bootstrapped and regression tested with --with-arch z196 and z13 on
s390 and s390x.
-Andreas-
gcc/ChangeLog:
2016-04-20 Andreas Krebbel <krebbel@linux.vnet.ibm.com>
PR target/70674
* config/s390/s390.c (s390_restore_gprs_from_fprs): Pick the new
stack_restore_from_fpr pattern when restoring r15.
(s390_optimize_prologue): Strip away the memory barrier in the
parallel when trying to get rid of restore insns.
* config/s390/s390.md ("stack_restore_from_fpr"): New insn
definition for loading the stack pointer from an FPR. Compared to
the normal move insn this pattern includes a full memory barrier.
gcc/testsuite/ChangeLog:
2016-04-20 Andreas Krebbel <krebbel@linux.vnet.ibm.com>
PR target/70674
* gcc.target/s390/pr70674.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/s390/pr70674.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/s390/s390.c
trunk/gcc/config/s390/s390.md
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-522747-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 07:16:50 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70674] [4.9/5/6/7 regression] S/390: Memory access below stack pointer in epilogue
Date: Wed, 20 Apr 2016 07:16:00 -0000
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--- Comment #4 from Andreas Krebbel <krebbel at gcc dot gnu.org> ---
Author: krebbel
Date: Wed Apr 20 07:16:03 2016
New Revision: 235235
URL: https://gcc.gnu.org/viewcvs?rev=235235&root=gcc&view=rev
Log:
PR70674: S/390: Add memory barrier to stack pointer restore from fpr.
This patches fixes a problem with stack variable accesses being
scheduled after the stack pointer restore instructions. In the
testcase this happened with the stack variable 'a' accessed through the
frame pointer.
The existing stack_tie we have in the backend is basically useless
when trying to block stack variable accesses from being scheduled
across an insn. The alias set of stack variables and the frame alias
set usually differ and hence aren't in conflict with each other. The
solution appears to be a magic MEM term with a scratch register which
is handled as a full memory barrier when analyzing scheduling
dependencies.
With the patch a (clobber (mem:BLK (scratch))) is being added to the
restore instruction in order to prevent any memory operations to be
scheduled across the insn. The patch does that only for the one case
where the stack pointer is restored from an FPR. Theoretically this
might happen also in the case where the stack pointer gets restored
using a load multiple. However, triggering that problem with
load-multiple appears to be much harder since the load-multiple will
restore the frame pointer as well. So in order to see the problem a
different call-clobbered register would need to be used as temporary
stack pointer.
Another case which needs to be handled some day is the stack pointer
allocation part. It needs to be a memory barrier as well.
Bootstrapped and regression tested with --with-arch z196 and z13 on
s390 and s390x.
gcc/ChangeLog:
2016-04-20 Andreas Krebbel <krebbel@linux.vnet.ibm.com>
Backport from mainline
2016-04-20 Andreas Krebbel <krebbel@linux.vnet.ibm.com>
PR target/70674
* config/s390/s390.c (s390_restore_gprs_from_fprs): Pick the new
stack_restore_from_fpr pattern when restoring r15.
(s390_optimize_prologue): Strip away the memory barrier in the
parallel when trying to get rid of restore insns.
* config/s390/s390.md ("stack_restore_from_fpr"): New insn
definition for loading the stack pointer from an FPR. Compared to
the normal move insn this pattern includes a full memory barrier.
gcc/testsuite/ChangeLog:
2016-04-20 Andreas Krebbel <krebbel@linux.vnet.ibm.com>
Backport from mainline
2016-04-20 Andreas Krebbel <krebbel@linux.vnet.ibm.com>
PR target/70674
* gcc.target/s390/pr70674.c: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/gcc.target/s390/pr70674.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/config/s390/s390.c
branches/gcc-6-branch/gcc/config/s390/s390.md
branches/gcc-6-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-522748-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 07:19:26 2016
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70690] [6/7 Regression] r235002 miscompiles tcmalloc
Date: Wed, 20 Apr 2016 07:19:00 -0000
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--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Hmm, I still see
[ 140s] === test/integration/mallocx ===
[ 140s] test_overflow: pass
[ 140s] test_oom:test/integration/mallocx.c:86: Failed assertion:
(mallocx(hugemax, 0)) == (NULL) --> 0x17000000 != 0x0: Expected OOM for
mallocx(size=0x70000000, 0)
[ 140s] test_oom: fail
[ 140s] test_basic: pass
[ 141s] test_alignment_and_size: pass
[ 141s] --- pass: 3/4, skip: 0/4, fail: 1/4 ---
...
141s] Test suite summary: pass: 11/12, skip: 0/12, fail: 1/12
[ 141s] Makefile:387: recipe for target 'check_integration' failed
on i?86-linux. Works fine on x86_64-linux and ppc64le-linux now.
>From gcc-bugs-return-522749-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 07:21:03 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/70726] [6/7 Regression] Internal compiler error (ICE) on valid code
Date: Wed, 20 Apr 2016 07:21:00 -0000
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Apr 20 07:20:16 2016
New Revision: 235236
URL: https://gcc.gnu.org/viewcvs?rev=235236&root=gcc&view=rev
Log:
2016-04-20 Richard Biener <rguenther@suse.de>
PR tree-optimization/70726
* tree-vect-stmts.c (vectorizable_shift): Do not use scalar
shift amounts from a pattern stmt operand.
* g++.dg/vect/pr70726.cc: New testcase.
Added:
trunk/gcc/testsuite/g++.dg/vect/pr70726.cc
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-vect-stmts.c
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Subject: [Bug tree-optimization/70726] [6/7 Regression] Internal compiler error (ICE) on valid code
Date: Wed, 20 Apr 2016 07:22:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70726
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
Known to fail|6.1.0, 7.0 |
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-522751-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 07:22:29 2016
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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/70726] [6/7 Regression] Internal compiler error (ICE) on valid code
Date: Wed, 20 Apr 2016 07:22:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70726
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Apr 20 07:21:42 2016
New Revision: 235237
URL: https://gcc.gnu.org/viewcvs?rev=235237&root=gcc&view=rev
Log:
2016-04-20 Richard Biener <rguenther@suse.de>
PR tree-optimization/70726
* tree-vect-stmts.c (vectorizable_shift): Do not use scalar
shift amounts from a pattern stmt operand.
* g++.dg/vect/pr70726.cc: New testcase.
Added:
branches/gcc-6-branch/gcc/testsuite/g++.dg/vect/pr70726.cc
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/testsuite/ChangeLog
branches/gcc-6-branch/gcc/tree-vect-stmts.c
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/70689] [6/7 Regression] ICE on valid code at -O1 in 32-bit mode on x86_64-linux-gnu in curr_insn_transform, at lra-constraints.c:3564
Date: Wed, 20 Apr 2016 07:24:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
Known to work| |5.3.0
Target Milestone|6.0 |6.2
Known to fail| |6.1.0
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From: "vsevolod.livinskij at frtk dot ru" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70733] New: Wrong code with nested structs and bit field.
Date: Wed, 20 Apr 2016 07:30:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70733
Bug ID: 70733
Summary: Wrong code with nested structs and bit field.
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: vsevolod.livinskij at frtk dot ru
Target Milestone: ---
Created attachment 38314
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38314&action=edit
Reproducer.
Test case produces incorrect result.
Output:
> clang++ repr.cpp; ./a.out
-4
> g++ repr.cpp; ./a.out
137438953468
GCC version:
> g++ -v
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/export/users/vlivinsk/gcc-trunk/bin/libexec/gcc/x86_64-pc-linux-gnu/7.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /export/users/vlivinsk/gcc-trunk/gcc/configure
--with-arch=corei7 --with-cpu=corei7 --enable-clocale=gnu --with-system-zlib
--enable-shared --with-demangler-in-ld --enable-cloog-backend=isl
--with-fpmath=sse --enable-checking=release --enable-languages=c,c++,lto
--with-gmp=/export/users/vlivinsk/gcc-trunk/gmp-6.1.0/bin
--with-mpfr=/export/users/vlivinsk/gcc-trunk/mpfr-3.1.3/bin
--with-mpc=/export/users/vlivinsk/gcc-trunk/mpc-1.0.3/bin
--prefix=/export/users/vlivinsk/gcc-trunk/bin
Thread model: posix
gcc version 7.0.0 20160418 (experimental) (Revision=235129)
Test:
#include <iostream>
struct A {
unsigned long member : 37;
};
struct B {
A member;
} b;
long a;
int main() {
b.member.member = 4;
a = -b.member.member;
if (a != 4)
abort();
}
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70732] Operator new is unable to throw std::bad_alloc() when memory is exhausted in statically linked executable
Date: Wed, 20 Apr 2016 07:51:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2016-04-20
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
unwind-dw2-fde.c does
static inline int
start_fde_sort (struct fde_accumulator *accu, size_t count)
{
size_t size;
if (! count)
return 0;
size = sizeof (struct fde_vector) + sizeof (const fde *) * count;
if ((accu->linear = malloc (size)))
{
accu->linear->count = 0;
if ((accu->erratic = malloc (size)))
accu->erratic->count = 0;
return 1;
}
else
return 0;
}
via
#0 search_object (ob=ob@entry=0x80fafa4 <object>,
pc=pc@entry=0x80563ee <_Unwind_RaiseException+46>)
at /space/rguenther/src/svn/gcc-5-branch/libgcc/unwind-dw2-fde.c:966
#1 0x08058275 in _Unwind_Find_registered_FDE (bases=0xffdfa7d4,
pc=0x80563ee <_Unwind_RaiseException+46>)
at /space/rguenther/src/svn/gcc-5-branch/libgcc/unwind-dw2-fde.c:1025
#2 _Unwind_Find_FDE (pc=0x80563ee <_Unwind_RaiseException+46>,
bases=0xffdfa7d4)
at /space/rguenther/src/svn/gcc-5-branch/libgcc/unwind-dw2-fde-dip.c:448
#3 0x08054bf3 in uw_frame_state_for (context=context@entry=0xffdfa780,
fs=fs@entry=0xffdfa690)
at /space/rguenther/src/svn/gcc-5-branch/libgcc/unwind-dw2.c:1241
#4 0x08055c76 in uw_init_context_1 (context=context@entry=0xffdfa780,
outer_cfa=outer_cfa@entry=0xffdfa960, outer_ra=
0x804aac4 <__cxxabiv1::__cxa_throw(void*, std::type_info*, void
(*)(void*))+100>) at
/space/rguenther/src/svn/gcc-5-branch/libgcc/unwind-dw2.c:1562
#5 0x080563ef in _Unwind_RaiseException (exc=0x8835d78)
at /space/rguenther/src/svn/gcc-5-branch/libgcc/unwind.inc:88
#6 0x0804aac4 in __cxxabiv1::__cxa_throw (obj=0x8835d98,
tinfo=0x80f9df4 <typeinfo for std::bad_alloc>,
dest=0x80490b0 <std::bad_alloc::~bad_alloc()>)
at
/space/rguenther/src/svn/gcc-5-branch/libstdc++-v3/libsupc++/eh_throw.cc:82
but it's just trying to sort the FDE - if it fails to allocate the memory
required for that (glibc does quite a few mmap calls for that attempt) it
continues w/o sorting the FDE but then eventually properly unwinds and throws.
If I add a printf to print k to show how many times foo is called before
throwing then I see
> ./a.out
9682
9684
9686
terminate called after throwing an instance of 'std::bad_alloc'
what(): std::bad_alloc
Aborted
for the dynamically linked case and
> ./a.out
14626
14628
14630
terminate called after throwing an instance of 'std::bad_alloc'
what(): std::bad_alloc
Aborted
for the statically linked case. I think thats a reasonable result and thus
I think there is no bug.
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From: "vsevolod.livinskij at frtk dot ru" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70733] Wrong code with nested structs and bit field.
Date: Wed, 20 Apr 2016 07:54:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70733
--- Comment #1 from Vsevolod Livinskiy <vsevolod.livinskij at frtk dot ru> ---
(In reply to Vsevolod Livinskiy from comment #0)
> Created attachment 38314 [details]
> Reproducer.
>
> Test case produces incorrect result.
>
> Output:
> > clang++ repr.cpp; ./a.out
> -4
> > g++ repr.cpp; ./a.out
> 137438953468
>
> GCC version:
> > g++ -v
> Using built-in specs.
> COLLECT_GCC=g++
> COLLECT_LTO_WRAPPER=/export/users/vlivinsk/gcc-trunk/bin/libexec/gcc/x86_64-
> pc-linux-gnu/7.0.0/lto-wrapper
> Target: x86_64-pc-linux-gnu
> Configured with: /export/users/vlivinsk/gcc-trunk/gcc/configure
> --with-arch=corei7 --with-cpu=corei7 --enable-clocale=gnu --with-system-zlib
> --enable-shared --with-demangler-in-ld --enable-cloog-backend=isl
> --with-fpmath=sse --enable-checking=release --enable-languages=c,c++,lto
> --with-gmp=/export/users/vlivinsk/gcc-trunk/gmp-6.1.0/bin
> --with-mpfr=/export/users/vlivinsk/gcc-trunk/mpfr-3.1.3/bin
> --with-mpc=/export/users/vlivinsk/gcc-trunk/mpc-1.0.3/bin
> --prefix=/export/users/vlivinsk/gcc-trunk/bin
> Thread model: posix
> gcc version 7.0.0 20160418 (experimental) (Revision=235129)
>
> Test:
> #include <iostream>
>
> struct A {
> unsigned long member : 37;
> };
>
> struct B {
> A member;
> } b;
>
> long a;
>
> int main() {
> b.member.member = 4;
> a = -b.member.member;
> if (a != 4)
> abort();
> }
Typo. Should be
if (a != -4)
abort();
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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/70731] With -Ofast, reorder floating-point and integer operands to minimize conversions
Date: Wed, 20 Apr 2016 07:55:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
I think the only reasonable implementation would be in the frontend (apart from
the case where VRP has enough information to make the transform valid).
That said, this is a hard one and I don't think an option to do that by default
(disregarding overflow) is useful in the end. It'll break too much code.
>From gcc-bugs-return-522757-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 08:02:17 2016
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Subject: [Bug target/70733] Wrong code with nested structs and bit field.
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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> ---
GCC and LLVM are known to implement the language extension of bitfields larger
than int differently and this is one of the expected results.
GCC does _not_ promote such bitfields and thus the negation is carried out
in 'unsigned long : 37' and then zero-extended to long int.
>From gcc-bugs-return-522758-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 08:03:44 2016
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Subject: [Bug c++/70733] Wrong code with nested structs and bit field.
Date: Wed, 20 Apr 2016 08:03:00 -0000
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
LLVM does effectively
int main() {
b.member.member = 4;
a = -(unsigned long)b.member.member;
if (a != -4)
abort();
and if you write that then GCC behavior agrees with that of LLVM.
>From gcc-bugs-return-522759-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 08:09:01 2016
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Subject: [Bug c++/70690] [6/7 Regression] r235002 miscompiles tcmalloc
Date: Wed, 20 Apr 2016 08:09:00 -0000
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--- Comment #10 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
But this isn't tcmalloc, but jemalloc:
https://github.com/jemalloc/jemalloc/blob/dev/test/integration/mallocx.c#L70
>From gcc-bugs-return-522760-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 09:18:17 2016
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Subject: [Bug c++/70690] [6/7 Regression] r235002 miscompiles tcmalloc
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--- Comment #11 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
(In reply to Markus Trippelsdorf from comment #10)
> But this isn't tcmalloc, but jemalloc:
>
> https://github.com/jemalloc/jemalloc/blob/dev/test/integration/mallocx.c#L70
Just to clarify. jemalloc is a pure C application, so its assertion failure
is unrelated to this bug.
>From gcc-bugs-return-522761-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 09:21:07 2016
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Subject: [Bug c++/70732] Operator new is unable to throw std::bad_alloc() when memory is exhausted in statically linked executable
Date: Wed, 20 Apr 2016 09:21:00 -0000
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--- Comment #2 from Krzysztof Małysa <krzyk240 at gmail dot com> ---
I read some code from unwind-dw2-fde.c and it makes sense.
In the code above, stack unwinding happens in low memory conditions which
causes unsuccessful memory allocations and because of deep recursion, there are
so many of them.
But maybe it is reasonable to make an optimization to not flood system with
many, many unsuccessful syscalls (brk() and mmap2()). It's important to note
that stack unwinding happens at the bottom of recursion (so it's unlikely that
there will be more memory available - see
https://github.com/gcc-mirror/gcc/blob/master/libgcc/unwind-dw2-fde.c#L957),
also look at these syscalls which malloc makes:
brk(0xcad8000) = 0xcab4000
mmap2(NULL, 1048576, ...) = -1
It tries to expand stack (which is not successful due to deep recursion that
was made) and to map 1MB of memory, what is very much compared to what is
needed, so it will almost always result in malloc() returning NULL. That is why
it doesn't make much sense to call malloc() all the time if there is no memory
available while we're freeing only small chunks of memory.
All in all, I agree that there is no bug, but I think that it's a good
opportunity to make an optimization here.
>From gcc-bugs-return-522762-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 09:33:31 2016
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Subject: [Bug tree-optimization/70725] Internal compiler error (ICE) on valid code
Date: Wed, 20 Apr 2016 09:33:00 -0000
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--- Comment #5 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Wed Apr 20 09:32:45 2016
New Revision: 235250
URL: https://gcc.gnu.org/viewcvs?rev=235250&root=gcc&view=rev
Log:
PR tree-optimization/70725
* tree-if-conv.c (is_false_predicate): New function.
(predicate_mem_writes): Use it.
* gcc.dg/pr70725.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/pr70725.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-if-conv.c
>From gcc-bugs-return-522764-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 09:54:26 2016
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Subject: [Bug c++/70732] Operator new is unable to throw std::bad_alloc() when memory is exhausted in statically linked executable
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
I think optimizing for the low memory situation is premature optimization. I
also don't think it's very easy to do.
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From: "arigo at tunes dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/70734] New: __builtin_add_overflow emits poor code on x86-64
Date: Wed, 20 Apr 2016 09:54:00 -0000
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Bug ID: 70734
Summary: __builtin_add_overflow emits poor code on x86-64
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Tested on gcc_5_branch:
extern void abort(void);
void f(int a, int b, int *r)
{
if (__builtin_add_overflow(a, b, r))
abort();
}
Results in this x86-64 assembler (xgcc -O2 -S):
xorl %eax, %eax
addl %edi, %esi
seto %al
movl %esi, (%rdx)
testl %eax, %eax
jne .L8
I would expect code with a direct "jo" instead of "seto/test/jne". I guess it
is a known issue related to the difficulties of returning the condition code
from an asm() statement. Still, I would have expected this builtin to work
around that issue.
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Subject: [Bug c++/70735] New: problem combining std::function, generic lambdas and static variables
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70735
Bug ID: 70735
Summary: problem combining std::function, generic lambdas and
static variables
Product: gcc
Version: 5.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: paolo.monteverde at gmail dot com
Target Milestone: ---
The code
#include <iostream>
#include <functional>
int main()
{
static int a;
std::function<void(int)> f = [](auto) { std::cout << a << '\n'; };
a = 1;
f(0);
}
prints "0" instead of "1". Compiled with "g++ -std=c++14"; verified on Arch and
Ubuntu with GCC 5.3.0. Though, using coliru, it works well:
http://coliru.stacked-crooked.com/a/abff4a693ebcaf86
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Subject: [Bug tree-optimization/70729] Loop marked with omp simd pragma is not vectorized
Date: Wed, 20 Apr 2016 10:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70729
--- Comment #7 from rguenther at suse dot de <rguenther at suse dot de> ---
On Tue, 19 Apr 2016, ienkovich at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70729
>
> Ilya Enkovich <ienkovich at gcc dot gnu.org> changed:
>
> What |Removed |Added
> ----------------------------------------------------------------------------
> CC| |ienkovich at gcc dot gnu.org
>
> --- Comment #5 from Ilya Enkovich <ienkovich at gcc dot gnu.org> ---
> (In reply to Richard Biener from comment #2)
> > Index: gcc/tree-ssa-loop-im.c
> > ===================================================================
> > --- gcc/tree-ssa-loop-im.c (revision 235201)
> > +++ gcc/tree-ssa-loop-im.c (working copy)
> > @@ -2198,6 +2198,9 @@ ref_indep_loop_p (struct loop *loop, im_
> > {
> > gcc_checking_assert (MEM_ANALYZABLE (ref));
> >
> > + if (loop->safelen == INT_MAX)
> > + return true;
> > +
> > return ref_indep_loop_p_2 (loop, ref, false);
> > }
> >
> >
> > fixes this. But better abstract loop->safelen == INT_MAX into a predicate
> > in cfgloop.h.
> >
>
> I believe any nonzero value should be good enough.
Any positive value I suppose. But yes, if the reference address
is invariant then if safelen is > 0 it doesn't conflict with any
iteration.
I will test a patch.
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Subject: [Bug tree-optimization/70725] Internal compiler error (ICE) on valid code
Date: Wed, 20 Apr 2016 10:09:00 -0000
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--- Comment #6 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Wed Apr 20 10:08:31 2016
New Revision: 235252
URL: https://gcc.gnu.org/viewcvs?rev=235252&root=gcc&view=rev
Log:
PR tree-optimization/70725
* tree-if-conv.c (is_false_predicate): New function.
(predicate_mem_writes): Use it.
* gcc.dg/pr70725.c: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/gcc.dg/pr70725.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/testsuite/ChangeLog
branches/gcc-6-branch/gcc/tree-if-conv.c
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Subject: [Bug tree-optimization/70725] Internal compiler error (ICE) on valid code
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #7 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/70729] Loop marked with omp simd pragma is not vectorized
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--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Index: gcc/passes.def
===================================================================
--- gcc/passes.def (revision 235237)
+++ gcc/passes.def (working copy)
@@ -244,6 +244,7 @@ along with GCC; see the file COPYING3.
NEXT_PASS (pass_cse_sincos);
NEXT_PASS (pass_optimize_bswap);
NEXT_PASS (pass_laddress);
+ NEXT_PASS (pass_lim);
NEXT_PASS (pass_split_crit_edges);
NEXT_PASS (pass_pre);
NEXT_PASS (pass_sink_code);
@@ -257,10 +258,8 @@ along with GCC; see the file COPYING3.
NEXT_PASS (pass_fix_loops);
NEXT_PASS (pass_tree_loop);
PUSH_INSERT_PASSES_WITHIN (pass_tree_loop)
- NEXT_PASS (pass_tree_loop_init);
- NEXT_PASS (pass_lim);
- NEXT_PASS (pass_copy_prop);
NEXT_PASS (pass_dce);
+ NEXT_PASS (pass_tree_loop_init);
NEXT_PASS (pass_tree_unswitch);
NEXT_PASS (pass_scev_cprop);
NEXT_PASS (pass_record_bounds);
will then vectorize the loop successfully. I'm quite sympathetic to moving
LIM before PRE (removing copy-prop might pessimize -O1 where PRE doesn't run,
but -O1 should use a different pipeline, maybe based on the -Og one...).
It also moves LIM out of -ftree-loop-optimize (the oacc kernels group also
runs LIM independent on -ftree-loop-optimize).
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Subject: [Bug target/70734] __builtin_add_overflow emits poor code on x86-64
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--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
gcc-6 produces
.cfi_startproc
addl %esi, %edi
movl %edi, (%rdx)
jo .L9
rep ret
.L9:
pushq %rax
.cfi_def_cfa_offset 16
call abort
.cfi_endproc
is that what you wanted?
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Subject: [Bug target/70734] __builtin_add_overflow emits poor code on x86-64
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--- Comment #2 from Marc Glisse <glisse at gcc dot gnu.org> ---
(In reply to Marc Glisse from comment #1)
> movl %edi, (%rdx)
Looks like we fail to notice that the result of the addition is unused and keep
this dead store...
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Subject: [Bug tree-optimization/70729] Loop marked with omp simd pragma is not vectorized
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--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Oh, and I believe to make nests with only outer safelen > 0 work correctly we
need to move the check elsewhere:
Index: gcc/tree-ssa-loop-im.c
===================================================================
--- gcc/tree-ssa-loop-im.c (revision 235237)
+++ gcc/tree-ssa-loop-im.c (working copy)
@@ -2120,6 +2120,12 @@ ref_indep_loop_p_1 (struct loop *loop, i
bitmap_iterator bi;
im_mem_ref *aref;
+ /* If the Ith and the I + nth iterations can be evaluated
+ concurrently a reference with an invariant address is
+ not dependent on any other memory reference. */
+ if (loop->safelen > 0)
+ return true;
+
if (stored_p)
refs_to_check = &memory_accesses.refs_in_loop[loop->num];
else
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Marc Glisse from comment #2)
> (In reply to Marc Glisse from comment #1)
> > movl %edi, (%rdx)
>
> Looks like we fail to notice that the result of the addition is unused and
> keep this dead store...
It's not unused, it's stored to memory.
>From gcc-bugs-return-522774-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 10:31:25 2016
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Subject: [Bug target/70734] __builtin_add_overflow emits poor code on x86-64
Date: Wed, 20 Apr 2016 10:31:00 -0000
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--- Comment #4 from Armin Rigo <arigo at tunes dot org> ---
Ah, sorry about that; I only checked the 5.x branch. My mistake.
>From gcc-bugs-return-522775-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 10:46:19 2016
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Subject: [Bug target/70734] __builtin_add_overflow emits poor code on x86-64
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
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--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
So fixed in GCC 6.
>From gcc-bugs-return-522777-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 10:48:58 2016
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Subject: [Bug target/30354] -Os doesn't optimize a/CONST even if it saves size.
Date: Wed, 20 Apr 2016 10:48:00 -0000
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--- Comment #19 from Bernhard Reutner-Fischer <aldot at gcc dot gnu.org> ---
(In reply to Denis Vlasenko from comment #17)
> Any chance of this being finally done?
>
> I proposed a simple, working patch in 2007, it's 2016 now and all these
> years users of -Os suffer from slow divisions in important cases usch as
> "signed_int / 16" and "unsigned_int / 10".
> So.
> Any chance of this patch being accepted sometime before 2100? ;)
For GCC you need to follow https://gcc.gnu.org/contribute.html to submit
patches.
https://gcc.gnu.org/contribute.html#legal is the first obstacle unless you
happen to work for a company (like e.g. redhat) that has company-wide copyright
assignment in place. Alternatively you can put your changes in Public Domain or
go through an individual copyright assignment process for GCC with the FSF.
Then you have to create proper testcases in dejagnu form included in your patch
and have to submit that to the gcc-patches@ ML after proper bootstrapping and
regression testing. It is recommended to Cc: the maintainer(s) of the
architectures/subsystems/files you are touching in your patch submission to
gain their attention. See toplevel MAINTAINERS file.
If you want to ensure that object-size increase/regressions in your testcases
get noticed, you can add a dejagnu check for that (see
gcc/testsuite/lib/scanasm.exp:proc object-size).
For details on patch submission please refer to:
https://gcc.gnu.org/contribute.html#patches
HTH,
>From gcc-bugs-return-522776-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 10:48:35 2016
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Subject: [Bug target/70734] __builtin_add_overflow emits poor code on x86-64
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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 #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed by r223146.
>From gcc-bugs-return-522778-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 10:52:02 2016
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Subject: [Bug tree-optimization/66646] small loop turned into memmove because of tree ldist
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--- Comment #3 from amker at gcc dot gnu.org ---
BTW, shall we version the loop in ldist pass if # of iterations can't be
computed at compilation time. We can check the target dependent value when
deciding which version should be executed. It doesn't make sense to turn loops
into memory functions, while trying to inline small memory functions at the
same time.
>From gcc-bugs-return-522779-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 11:04:41 2016
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/66646] small loop turned into memmove because of tree ldist
Date: Wed, 20 Apr 2016 11:04:00 -0000
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--- Comment #4 from rguenther at suse dot de <rguenther at suse dot de> ---
On Wed, 20 Apr 2016, amker at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66646
>
> --- Comment #3 from amker at gcc dot gnu.org ---
> BTW, shall we version the loop in ldist pass if # of iterations can't be
> computed at compilation time. We can check the target dependent value when
> deciding which version should be executed. It doesn't make sense to turn loops
> into memory functions, while trying to inline small memory functions at the
> same time.
Well, the idea is that the _target_ knows how to inline it (and whether
to inline it) best. A stupid memset loop using chars can be very
well expanded faster like with a rep; movb;
Of course the issue here is that memmove doesn't have a target specific
expansion way. That's something we should eventually fix.
That said - heuristics are hard - w/o transforming into a call we
completely peel / jump-thread the whole thing which is obviously
better.
>From gcc-bugs-return-522780-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 11:05:37 2016
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Subject: [Bug target/70734] __builtin_add_overflow emits poor code on x86-64
Date: Wed, 20 Apr 2016 11:05:00 -0000
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--- Comment #7 from Marc Glisse <glisse at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #3)
> It's not unused, it's stored to memory.
Of course, I read the testcase too quickly and thought *r was a throw-away
local variable... Sorry about that.
>From gcc-bugs-return-522781-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 11:47:33 2016
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From: "willy6545 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/70736] New: false positive uninitialized warning
Date: Wed, 20 Apr 2016 11:47:00 -0000
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Bug ID: 70736
Summary: false positive uninitialized warning
Product: gcc
Version: 5.3.1
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Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: willy6545 at gmail dot com
Target Milestone: ---
This function reproduces the problem; yes it looks weird, but it's simplified
from a less weird function.
I compile it with 'gcc -O2 -Wmaybe-uninitialized'
void *foo(char *);
int main(int argc, char **argv)
{
void *a = argv[0], *b;
if (!a)
return 0;
do {
if (a) {
b = a;
a = *argv++;
}
foo(b);
} while (b);
return 0;
}
gcc version 5.3.1 20160316 (Debian 5.3.1-12)
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Subject: [Bug c++/70735] [5/6/7 Regression] problem combining std::function, generic lambdas and static variables
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-20
Known to work| |4.9.3, 5.3.0
Summary|problem combining |[5/6/7 Regression] problem
|std::function, generic |combining std::function,
|lambdas and static |generic lambdas and static
|variables |variables
Ever confirmed|0 |1
Known to fail| |5.3.1, 6.0, 7.0
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I can reproduce this with 5.3.1 and later, but not 5.3.0
As requested at https://gcc.gnu.org/bugs/ please provide the output of 'gcc
-v', on both Debian and Arch, because I don't think you're using 5.3.0
>From gcc-bugs-return-522783-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 11:55:42 2016
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Subject: [Bug rtl-optimization/70703] [6/7 regression] Regression in register usage on x86
Date: Wed, 20 Apr 2016 11:55:00 -0000
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Bernhard Reutner-Fischer <aldot at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |aldot at gcc dot gnu.org,
| |hubicka at gcc dot gnu.org,
| |uros at gcc dot gnu.org
Blocks| |16996
--- Comment #1 from Bernhard Reutner-Fischer <aldot at gcc dot gnu.org> ---
Cc Uros
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=16996
[Bug 16996] [meta-bug] code size improvements
>From gcc-bugs-return-522784-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 11:56:03 2016
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Subject: [Bug c/70736] false positive uninitialized warning
Date: Wed, 20 Apr 2016 11:56:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-20
Known to work| |6.0
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
No longer warns with GCC 6, confirmed for GCC 5. Didn't warn with GCC 4.8.
>From gcc-bugs-return-522785-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 12:10:30 2016
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Subject: [Bug libfortran/70684] [4.9/5/6/7 Regression] incorrect reading of values from file on Windows
Date: Wed, 20 Apr 2016 12:10:00 -0000
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Ray Donnelly <mingw.android at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mingw.android at gmail dot com
--- Comment #9 from Ray Donnelly <mingw.android at gmail dot com> ---
Should the other two places - next_char_default () and next_char_internal ()
-that also do:
dtp->u.p.at_eol = (c == '\n' || c == EOF);
not check for '\r' too?
>From gcc-bugs-return-522786-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 12:32:10 2016
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From: "paolo.monteverde at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70735] [5/6/7 Regression] problem combining std::function, generic lambdas and static variables
Date: Wed, 20 Apr 2016 12:32:00 -0000
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--- Comment #2 from Paolo Monteverde <paolo.monteverde at gmail dot com> ---
(In reply to Jonathan Wakely from comment #1)
> I can reproduce this with 5.3.1 and later, but not 5.3.0
>
> As requested at https://gcc.gnu.org/bugs/ please provide the output of 'gcc
> -v', on both Debian and Arch, because I don't think you're using 5.3.0
Sorry, on Ubuntu the version is actually 5.3.1, but on Arch is 5.3.0, as far as
I can see.
gcc -v on Arch
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-unknown-linux-gnu/5.3.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: /build/gcc-multilib/src/gcc-5-20160209/configure --prefix=/usr
--libdir=/usr/lib --libexecdir=/usr/lib --mandir=/usr/share/man
--infodir=/usr/share/info --with-bugurl=https://bugs.archlinux.org/
--enable-languages=c,c++,ada,fortran,go,lto,objc,obj-c++ --enable-shared
--enable-threads=posix --enable-libmpx --with-system-zlib --with-isl
--enable-__cxa_atexit --disable-libunwind-exceptions --enable-clocale=gnu
--disable-libstdcxx-pch --disable-libssp --enable-gnu-unique-object
--enable-linker-build-id --enable-lto --enable-plugin
--enable-install-libiberty --with-linker-hash-style=gnu
--enable-gnu-indirect-function --enable-multilib --disable-werror
--enable-checking=release
Thread model: posix
gcc version 5.3.0 (GCC)
-----------------------------
gcc -v on Ubuntu
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/5/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu 5.3.1-8ubuntu3'
--with-bugurl=file:///usr/share/doc/gcc-5/README.Bugs
--enable-languages=c,ada,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-5 --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --with-system-zlib
--disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo
--with-java-home=/usr/lib/jvm/java-1.5.0-gcj-5-amd64/jre --enable-java-home
--with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-5-amd64
--with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-5-amd64
--with-arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar
--enable-objc-gc --enable-multiarch --disable-werror --with-arch-32=i686
--with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib
--with-tune=generic --enable-checking=release --build=x86_64-linux-gnu
--host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 5.3.1 20160211 (Ubuntu 5.3.1-8ubuntu3)
COLLECT_GCC_OPTIONS='-std=c++14' '-v' '-shared-libgcc' '-mtune=generic'
'-march=x86-64'
/usr/lib/gcc/x86_64-linux-gnu/5/cc1plus -quiet -v -imultiarch x86_64-linux-gnu
-D_GNU_SOURCE prova.cpp -quiet -dumpbase prova.cpp -mtune=generic -march=x86-64
-auxbase prova -std=c++14 -version -fstack-protector-strong -Wformat
-Wformat-security -o /tmp/ccv55BZT.s
GNU C++14 (Ubuntu 5.3.1-8ubuntu3) version 5.3.1 20160211 (x86_64-linux-gnu)
compiled by GNU C version 5.3.1 20160211, GMP version 6.1.0, MPFR version
3.1.3-p5, MPC version 1.0.3
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
ignoring duplicate directory "/usr/include/x86_64-linux-gnu/c++/5"
ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu"
ignoring nonexistent directory
"/usr/lib/gcc/x86_64-linux-gnu/5/../../../../x86_64-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
/usr/include/c++/5
/usr/include/x86_64-linux-gnu/c++/5
/usr/include/c++/5/backward
/usr/lib/gcc/x86_64-linux-gnu/5/include
/usr/local/include
/usr/lib/gcc/x86_64-linux-gnu/5/include-fixed
/usr/include/x86_64-linux-gnu
/usr/include
End of search list.
GNU C++14 (Ubuntu 5.3.1-8ubuntu3) version 5.3.1 20160211 (x86_64-linux-gnu)
compiled by GNU C version 5.3.1 20160211, GMP version 6.1.0, MPFR version
3.1.3-p5, MPC version 1.0.3
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: df60c2703ba5087e759e57ea57193bd3
COLLECT_GCC_OPTIONS='-std=c++14' '-v' '-shared-libgcc' '-mtune=generic'
'-march=x86-64'
as -v --64 -o /tmp/ccag5Pi3.o /tmp/ccv55BZT.s
GNU assembler version 2.26 (x86_64-linux-gnu) using BFD version (GNU Binutils
for Ubuntu) 2.26
COMPILER_PATH=/usr/lib/gcc/x86_64-linux-gnu/5/:/usr/lib/gcc/x86_64-linux-gnu/5/:/usr/lib/gcc/x86_64-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/5/:/usr/lib/gcc/x86_64-linux-gnu/
LIBRARY_PATH=/usr/lib/gcc/x86_64-linux-gnu/5/:/usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/5/../../../../lib/:/lib/x86_64-linux-gnu/:/lib/../lib/:/usr/lib/x86_64-linux-gnu/:/usr/lib/../lib/:/usr/lib/gcc/x86_64-linux-gnu/5/../../../:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-std=c++14' '-v' '-shared-libgcc' '-mtune=generic'
'-march=x86-64'
/usr/lib/gcc/x86_64-linux-gnu/5/collect2 -plugin
/usr/lib/gcc/x86_64-linux-gnu/5/liblto_plugin.so
-plugin-opt=/usr/lib/gcc/x86_64-linux-gnu/5/lto-wrapper
-plugin-opt=-fresolution=/tmp/cc5VpVCc.res -plugin-opt=-pass-through=-lgcc_s
-plugin-opt=-pass-through=-lgcc -plugin-opt=-pass-through=-lc
-plugin-opt=-pass-through=-lgcc_s -plugin-opt=-pass-through=-lgcc --sysroot=/
--build-id --eh-frame-hdr -m elf_x86_64 --hash-style=gnu --as-needed
-dynamic-linker /lib64/ld-linux-x86-64.so.2 -z relro
/usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu/crt1.o
/usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu/crti.o
/usr/lib/gcc/x86_64-linux-gnu/5/crtbegin.o -L/usr/lib/gcc/x86_64-linux-gnu/5
-L/usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu
-L/usr/lib/gcc/x86_64-linux-gnu/5/../../../../lib -L/lib/x86_64-linux-gnu
-L/lib/../lib -L/usr/lib/x86_64-linux-gnu -L/usr/lib/../lib
-L/usr/lib/gcc/x86_64-linux-gnu/5/../../.. /tmp/ccag5Pi3.o -lstdc++ -lm -lgcc_s
-lgcc -lc -lgcc_s -lgcc /usr/lib/gcc/x86_64-linux-gnu/5/crtend.o
/usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu/crtn.o
0
>From gcc-bugs-return-522787-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 12:48:40 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70735] [5/6/7 Regression] problem combining std::function, generic lambdas and static variables
Date: Wed, 20 Apr 2016 12:48:00 -0000
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--- Comment #3 from Paolo Monteverde <paolo.monteverde at gmail dot com> ---
Created attachment 38315
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38315&action=edit
preprocessed file
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/70503] [4.9/5 Regression] extern "C" functions in src/c++11/thread.cc are global in libstdc++.a
Date: Wed, 20 Apr 2016 13:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70503
--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Wed Apr 20 13:00:37 2016
New Revision: 235277
URL: https://gcc.gnu.org/viewcvs?rev=235277&root=gcc&view=rev
Log:
Ensure std::thread helpers have internal linkage
Backport from mainline
2016-04-05 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/70503
* src/c++11/thread.cc (execute_native_thread_routine,
execute_native_thread_routine_compat): Give internal linkage.
* testsuite/30_threads/thread/70503.cc: New test.
Added:
branches/gcc-5-branch/libstdc++-v3/testsuite/30_threads/thread/70503.cc
Modified:
branches/gcc-5-branch/libstdc++-v3/ChangeLog
branches/gcc-5-branch/libstdc++-v3/src/c++11/thread.cc
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69464
--- Comment #13 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Wed Apr 20 13:00:24 2016
New Revision: 235276
URL: https://gcc.gnu.org/viewcvs?rev=235276&root=gcc&view=rev
Log:
Avoid including all of <random> in <algorithm>
Backport from mainline
2016-01-25 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/69464
* include/Makefile.am: Add new header.
* include/Makefile.in: Regenerate.
* include/bits/random.h (uniform_int_distribution): Move to
bits/uniform_int_dist.h.
* include/bits/random.tcc (uniform_int_distribution::operator(),
uniform_int_distribution::__generate_impl): Likewise.
* include/bits/uniform_int_dist.h: New header.
* include/bits/stl_algo.h [__cplusplus >= 201103L]: Include
<bits/uniform_int_dist.h> instead of <random>.
* testsuite/20_util/specialized_algorithms/uninitialized_copy/
move_iterators/1.cc: Include correct header for uninitialized_copy.
* testsuite/20_util/specialized_algorithms/uninitialized_copy_n/
move_iterators/1.cc: Likewise.
* testsuite/25_algorithms/nth_element/58800.cc: Include correct
header for vector.
* testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error lines.
* testsuite/libstdc++-prettyprinters/whatis.cc: Include <random>.
Added:
branches/gcc-5-branch/libstdc++-v3/include/bits/uniform_int_dist.h
Modified:
branches/gcc-5-branch/libstdc++-v3/ChangeLog
branches/gcc-5-branch/libstdc++-v3/include/Makefile.am
branches/gcc-5-branch/libstdc++-v3/include/Makefile.in
branches/gcc-5-branch/libstdc++-v3/include/bits/random.h
branches/gcc-5-branch/libstdc++-v3/include/bits/random.tcc
branches/gcc-5-branch/libstdc++-v3/include/bits/stl_algo.h
branches/gcc-5-branch/libstdc++-v3/testsuite/20_util/specialized_algorithms/uninitialized_copy/move_iterators/1.cc
branches/gcc-5-branch/libstdc++-v3/testsuite/20_util/specialized_algorithms/uninitialized_copy_n/move_iterators/1.cc
branches/gcc-5-branch/libstdc++-v3/testsuite/25_algorithms/nth_element/58800.cc
branches/gcc-5-branch/libstdc++-v3/testsuite/26_numerics/random/pr60037-neg.cc
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/69478] [4.9/5 Regression] std::copy/std::move broken with trivial move-only types
Date: Wed, 20 Apr 2016 13:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69478
--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Wed Apr 20 13:00:43 2016
New Revision: 235278
URL: https://gcc.gnu.org/viewcvs?rev=235278&root=gcc&view=rev
Log:
Fix assertions for move assignment of trivial types
Backport from mainline
2016-01-26 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/69478
* include/bits/stl_algobase.h (__copy_move<_IsMove, true,
random_access_iterator_tag>): Check is_move_assignable when moving.
(__copy_move_backwards<_IsMove, true, random_access_iterator_tag>):
Likewise.
* testsuite/25_algorithms/copy/move_iterators/69478.cc: New.
* testsuite/25_algorithms/copy_backward/move_iterators/69478.cc: New.
* testsuite/25_algorithms/move/69478.cc: New.
* testsuite/25_algorithms/move_backward/69478.cc: New.
Added:
branches/gcc-5-branch/libstdc++-v3/testsuite/25_algorithms/copy/move_iterators/69478.cc
branches/gcc-5-branch/libstdc++-v3/testsuite/25_algorithms/copy_backward/move_iterators/69478.cc
branches/gcc-5-branch/libstdc++-v3/testsuite/25_algorithms/move/69478.cc
branches/gcc-5-branch/libstdc++-v3/testsuite/25_algorithms/move_backward/69478.cc
Modified:
branches/gcc-5-branch/libstdc++-v3/ChangeLog
branches/gcc-5-branch/libstdc++-v3/include/bits/stl_algobase.h
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Subject: [Bug c++/70737] New: Invalid C++ code compiles when using explicit template conversions
Date: Wed, 20 Apr 2016 13:13:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70737
Bug ID: 70737
Summary: Invalid C++ code compiles when using explicit template
conversions
Product: gcc
Version: 5.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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When compiling the code
struct C {
C(){}
template<typename T> explicit operator T () const { return T(42); }
operator int () const { return 1; }
operator double () const { return 3.14; }
};
unsigned foo() {
C x;
unsigned y = x;
return y;
}
g++ compiles giving a warning about using un-initialized variable y in foo on
the return statement.
The code is however invalid because `explicit` rules of the template conversion
and the other two should be considered equivalent and therefore the conversion
required in `foo` is ambiguous.
Note that the generated code after the warning does not use any of the three
conversions and simply returns 0 (code is "xor eax, eax" and "ret").
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Subject: [Bug c++/70737] Invalid C++ code compiles when using explicit template conversions
Date: Wed, 20 Apr 2016 13:15:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70737
--- Comment #1 from Andrea Griffini <agriff at tin dot it> ---
Forgot to mention that this a stripped-down version of a problem we had in
production code where indeed the result was an un-initialized value (resulting
in a random huge number).
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Subject: [Bug c++/70735] [5/6/7 Regression] problem combining std::function, generic lambdas and static variables
Date: Wed, 20 Apr 2016 13:21:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70735
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Paolo Monteverde from comment #2)
> Sorry, on Ubuntu the version is actually 5.3.1, but on Arch is 5.3.0, as far
> as I can see.
Unfortunately you are being misled by Arch lying.
> gcc -v on Arch
>
> Using built-in specs.
> COLLECT_GCC=gcc
> COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-unknown-linux-gnu/5.3.0/lto-wrapper
> Target: x86_64-unknown-linux-gnu
> Configured with: /build/gcc-multilib/src/gcc-5-20160209/configure
This shows that Arch is using a snapshot from the gcc-5-branch on 20160209,
which means it's 5.3.1, but they lie and call it 5.3.0 for some annoying
reason.
So your results agree with mine, it's a regression since 5.3.0 that only
affects 5.3.1
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Subject: [Bug c++/66543] False positive warning "variable set but not used"
Date: Wed, 20 Apr 2016 13:24:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66543
--- Comment #4 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Wed Apr 20 13:24:17 2016
New Revision: 235279
URL: https://gcc.gnu.org/viewcvs?rev=235279&root=gcc&view=rev
Log:
PR c++/66543 - -Wunused-but-set* false positives
* expr.c (mark_exp_read): Handle NON_DEPENDENT_EXPR.
* pt.c (make_pack_expansion): Call mark_exp_read.
* semantics.c (finish_id_expression): Call mark_type_use in
unevaluated context.
Added:
branches/gcc-6-branch/gcc/testsuite/g++.dg/warn/Wunused-parm-7.C
branches/gcc-6-branch/gcc/testsuite/g++.dg/warn/Wunused-parm-8.C
branches/gcc-6-branch/gcc/testsuite/g++.dg/warn/Wunused-var-24.C
branches/gcc-6-branch/gcc/testsuite/g++.dg/warn/Wunused-var-25.C
Modified:
branches/gcc-6-branch/gcc/cp/ChangeLog
branches/gcc-6-branch/gcc/cp/expr.c
branches/gcc-6-branch/gcc/cp/pt.c
branches/gcc-6-branch/gcc/cp/semantics.c
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Subject: [Bug c++/70735] [5/6/7 Regression] problem combining std::function, generic lambdas and static variables
Date: Wed, 20 Apr 2016 13:24:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |allan at archlinux dot org
--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #4)
> (In reply to Paolo Monteverde from comment #2)
> > Sorry, on Ubuntu the version is actually 5.3.1, but on Arch is 5.3.0, as far
> > as I can see.
>
> Unfortunately you are being misled by Arch lying.
>
> > gcc -v on Arch
> >
> > Using built-in specs.
> > COLLECT_GCC=gcc
> > COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-unknown-linux-gnu/5.3.0/lto-wrapper
> > Target: x86_64-unknown-linux-gnu
> > Configured with: /build/gcc-multilib/src/gcc-5-20160209/configure
>
> This shows that Arch is using a snapshot from the gcc-5-branch on 20160209,
> which means it's 5.3.1, but they lie and call it 5.3.0 for some annoying
> reason.
Allan, why does Arch do this?
The upstream numbering scheme used since gcc 5 means that we can distinguish
official releases from snapshots between releases, but Arch breaks that. Why?
>From gcc-bugs-return-522796-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 13:26:46 2016
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70737] Invalid C++ code compiles when using explicit template conversions
Date: Wed, 20 Apr 2016 13:26:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |accepts-invalid
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-20
Ever confirmed|0 |1
>From gcc-bugs-return-522797-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 13:30:41 2016
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From: "ktkachov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/64971] [5/6/7 Regression] gcc.c-torture/compile/pr37433.c ICEs with -mabi=ilp32
Date: Wed, 20 Apr 2016 13:30:00 -0000
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--- Comment #13 from ktkachov at gcc dot gnu.org ---
Author: ktkachov
Date: Wed Apr 20 13:29:32 2016
New Revision: 235281
URL: https://gcc.gnu.org/viewcvs?rev=235281&root=gcc&view=rev
Log:
[AArch64] Work around PR target/64971
2016-04-20 Andrew Pinski <apinski@cavium.com>
Kyrylo Tkachov <kyrylo.tkachov@arm.com>
PR target/64971
* config/aarch64/aarch64.md (sibcall): Force call
address to be DImode for ILP32.
(sibcall_value): Likewise.
* gcc.c-torture/compile/pr37433-1.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.c-torture/compile/pr37433-1.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/aarch64/aarch64.md
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-522798-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 13:33:42 2016
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From: "hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70738] New: Add -minteger-only option
Date: Wed, 20 Apr 2016 13:33:00 -0000
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Bug ID: 70738
Summary: Add -minteger-only option
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: hjl.tools at gmail dot com
CC: kirill.yukhin at intel dot com, ubizjak at gmail dot com
Target Milestone: ---
Target: x86
X86 Linux kernel is compiled only with integer instructions. Currently,
-mno-sse -mno-mmx -mno-sse2 -mno-3dnow -mno-avx -mno-80387 -mno-fp-ret-in-387
-mskip-rax-setup
is used to compile kernel. If we add another non-integer feature, it
has to be turned off. We can add a -minteger-only option to disable
all non-integer features so that kernel doesn't need a long list and
the same option will work for future compilers.
>From gcc-bugs-return-522799-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 13:39:17 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/64971] [5/6/7 Regression] gcc.c-torture/compile/pr37433.c ICEs with -mabi=ilp32
Date: Wed, 20 Apr 2016 13:39:00 -0000
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--- Comment #14 from ktkachov at gcc dot gnu.org ---
Author: ktkachov
Date: Wed Apr 20 13:38:31 2016
New Revision: 235282
URL: https://gcc.gnu.org/viewcvs?rev=235282&root=gcc&view=rev
Log:
[AArch64] Work around PR target/64971
2016-04-20 Andrew Pinski <apinski@cavium.com>
Kyrylo Tkachov <kyrylo.tkachov@arm.com>
PR target/64971
* config/aarch64/aarch64.md (sibcall): Force call
address to be DImode for ILP32.
(sibcall_value): Likewise.
* gcc.c-torture/compile/pr37433-1.c: New testcase.
Added:
branches/gcc-6-branch/gcc/testsuite/gcc.c-torture/compile/pr37433-1.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/config/aarch64/aarch64.md
branches/gcc-6-branch/gcc/testsuite/ChangeLog
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From: "allan at archlinux dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70735] [5/6/7 Regression] problem combining std::function, generic lambdas and static variables
Date: Wed, 20 Apr 2016 13:42:00 -0000
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--- Comment #6 from Allan McRae <allan at archlinux dot org> ---
(In reply to Jonathan Wakely from comment #5)
> (In reply to Jonathan Wakely from comment #4)
> > This shows that Arch is using a snapshot from the gcc-5-branch on 20160209,
> > which means it's 5.3.1, but they lie and call it 5.3.0 for some annoying
> > reason.
>
> Allan, why does Arch do this?
>
> The upstream numbering scheme used since gcc 5 means that we can distinguish
> official releases from snapshots between releases, but Arch breaks that. Why?
gcc 5.3.1 built from a snapshot tarball is calling itself 5.3.0 unless you use
"--with-pkgversion". I do not consider this a problem with Arch if gcc does
not report the correct version with the default configure options.
>From gcc-bugs-return-522801-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 13:49:31 2016
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From: "ktkachov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/64971] [5 Regression] gcc.c-torture/compile/pr37433.c ICEs with -mabi=ilp32
Date: Wed, 20 Apr 2016 13:49:00 -0000
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ktkachov at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |6.0, 7.0
Target Milestone|6.0 |5.4
Summary|[5/6/7 Regression] |[5 Regression]
|gcc.c-torture/compile/pr374 |gcc.c-torture/compile/pr374
|33.c ICEs with -mabi=ilp32 |33.c ICEs with -mabi=ilp32
Known to fail|6.0 |
--- Comment #15 from ktkachov at gcc dot gnu.org ---
Fixed on trunk (GCC 7) and GCC 6.
The refactorings Richard suggested should be tracked separately.
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From: "zmi007 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/70739] New: VALUE attribute interpretation in a non-interoperable procedure
Date: Wed, 20 Apr 2016 13:56:00 -0000
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Bug ID: 70739
Summary: VALUE attribute interpretation in a non-interoperable
procedure
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Assignee: unassigned at gcc dot gnu.org
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Target Milestone: ---
I see difference between ifort and gfortran interpretation of a
non-interoperable procedure (without BIND(C)) with VALUE attribute in dummy
argument.
Actually gfortran gives (intuitively) expected result compared to ifort, but
this is something that is difficult to find out in standard to confirm.
See details here
https://software.intel.com/en-us/forums/intel-fortran-compiler-for-linux-and-mac-os-x/topic/610807
(example)
/* test.c */
#include <stdint.h>
#include <stddef.h>
#include <stdio.h>
int32_t test (char* key, size_t len)
{
int32_t hash = 666;
printf("c key %s\n", key);
printf("c len %zu\n", len); // expected 2
return hash;
}
! test_main.f90
!-----------------------------------------------------------------------
!Module interface_module
!-----------------------------------------------------------------------
module interface_module
implicit none
interface
function test(key, length) result(hash) bind(c, name="test")
use iso_c_binding
character(kind=c_char),dimension(*) :: key
integer(c_size_t), value :: length
integer(c_int32_t) :: hash
end function test
end interface
abstract interface
function function_hash_template(key, length) ! <===== missing bind(c)
here !!!
use iso_c_binding
character(kind=c_char),dimension(*) :: key
integer(c_size_t), value :: length
integer(c_int32_t) :: function_hash_template
end function function_hash_template
end interface
contains
!-----------------------------------------------------------------------
!Function hash_wrap
!-----------------------------------------------------------------------
function hash_wrap(text, fun) result(hash)
use iso_c_binding
implicit none
character (len=*), target, intent(in) :: text
procedure(function_hash_template), pointer :: fun
integer(c_int32_t) :: hash
character(kind=c_char), dimension(len_trim(text)+1) :: text_c
integer(c_size_t) :: length
text_c = f_to_c_string(text) ! convert to c string for compatibility
length = len_trim(text) + 1
write(*,*) "hash_wrap, length = ", length
hash = fun(text_c,length)
end function hash_wrap
!-----------------------------------------------------------------------
!Function f_to_c_string
!-----------------------------------------------------------------------
pure function f_to_c_string (f_string) result (c_string)
use, intrinsic :: iso_c_binding, only: c_char, c_null_char
implicit none
character(len=*), intent(in) :: f_string
character(len=1,kind=c_char), dimension(len_trim(f_string)+1) :: c_string
integer :: n, i
n = len_trim(f_string)
do i = 1, n
c_string(i) = f_string(i:i)
end do
c_string(n + 1) = c_null_char
end function f_to_c_string
end module interface_module
!-----------------------------------------------------------------------
!Main program test_main
!-----------------------------------------------------------------------
program test_main
use interface_module
implicit none
write(*,*) test_wrap("1")
contains
!-----------------------------------------------------------------------
!Function test_wrap
!-----------------------------------------------------------------------
function test_wrap(text) result(hash)
use iso_fortran_env
implicit none
character(len=*),intent(in) :: text
integer(int32) :: hash
procedure(function_hash_template), pointer :: fun
fun => test
hash = int(hash_wrap(text, fun), int32)
end function test_wrap
end program test_main
Results:
gfortran:
gcc version 5.3.1 20160301 [gcc-5-branch revision 233849] (SUSE Linux)
gcc version 6.0.0 20160324 (experimental) [trunk revision 234449] (SUSE Linux)
hash_wrap, length = 2
c key 1
c len 2
666
ifort:
ifort version 16.0.2
hash_wrap, length = 2
c key 1
c len 140730916351912
666
Note the difference in len argument
Steve Lionel's comment to discuss here:
- [...]For a non-interoperable procedure, one without BIND(C), VALUE causes a
writable, temporary copy of the argument to be passed by reference. So in zmi's
case, the call through the procedure pointer, defined with an interface that
did not have BIND(C), caused the address of a copy of "length" to be passed.
>From gcc-bugs-return-522803-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 13:57:42 2016
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70735] [5/6/7 Regression] problem combining std::function, generic lambdas and static variables
Date: Wed, 20 Apr 2016 13:57:00 -0000
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--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Allan McRae from comment #6)
> (In reply to Jonathan Wakely from comment #5)
> > (In reply to Jonathan Wakely from comment #4)
>
> > > This shows that Arch is using a snapshot from the gcc-5-branch on 20160209,
> > > which means it's 5.3.1, but they lie and call it 5.3.0 for some annoying
> > > reason.
> >
> > Allan, why does Arch do this?
> >
> > The upstream numbering scheme used since gcc 5 means that we can distinguish
> > official releases from snapshots between releases, but Arch breaks that. Why?
>
> gcc 5.3.1 built from a snapshot tarball is calling itself 5.3.0 unless you
> use "--with-pkgversion". I do not consider this a problem with Arch if gcc
> does not report the correct version with the default configure options.
I don't see that:
$ /tmp/gcc5/bin/gcc -v
Using built-in specs.
COLLECT_GCC=/tmp/gcc5/bin/gcc
COLLECT_LTO_WRAPPER=/tmp/gcc5/libexec/gcc/x86_64-unknown-linux-gnu/5.3.1/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ../gcc-5-20160209/configure --disable-bootstrap
--prefix=/tmp/gcc5 --enable-languages=c,c++ --disable-libsanitizer
--disable-libgomp --disable-libmpx --disable-liboffloadmic
--disable-libquadmath --disable-libcilkrts --disable-libitm --disable-libvtv
--disable-libssp
Thread model: posix
gcc version 5.3.1 20160209 (GCC)
The version should be 5.3.1 YYYYMMDD , and the paths should include 5.3.1
That was built just now from
ftp://ftp.mirrorservice.org/sites/sourceware.org/pub/gcc/snapshots/5-20160209/gcc-5-20160209.tar.bz2
>From gcc-bugs-return-522804-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 14:00:36 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/70735] [5/6/7 Regression] problem combining std::function, generic lambdas and static variables
Date: Wed, 20 Apr 2016 14:00:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Component|c++ |libstdc++
Assignee|unassigned at gcc dot gnu.org |redi at gcc dot gnu.org
Target Milestone|--- |5.4
--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Anyway, I've bisected the regression to my r232274 commit.
>From gcc-bugs-return-522805-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 14:09:36 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/70700] ICE using -fdump-tree-all-graph option
Date: Wed, 20 Apr 2016 14:09:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mpolacek at gcc dot gnu.org
--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Can't really bisect this one. This particular ICE started with r215016, but
with r215015 I see another ICE:
$ ./cc1.215015 -quiet ~/x.i -fdump-tree-all-graph -O3
parse.c: In function ‘type_is_ok.isra.0’:
parse.c:2837:1: internal compiler error: in get_loop_body, at cfgloop.c:835
0x772ce6 get_loop_body(loop const*)
../../gcc/cfgloop.c:835
0x1361812 draw_cfg_nodes_for_loop
../../gcc/graph.c:218
0x1361914 draw_cfg_nodes
../../gcc/graph.c:242
0x1361a5c print_graph_cfg(char const*, function*)
../../gcc/graph.c:287
0xaf3f9a execute_function_dump
../../gcc/passes.c:1557
0xaf3c15 do_per_function
../../gcc/passes.c:1478
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
>From gcc-bugs-return-522806-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 14:13:16 2016
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Subject: [Bug c++/70735] [5/6/7 Regression] problem combining std::function, generic lambdas and static variables
Date: Wed, 20 Apr 2016 14:13:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Assignee|redi at gcc dot gnu.org |unassigned at gcc dot gnu.org
--- Comment #9 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Although that change just makes a latent bug apparent, this doesn't use
std::function and still fails the same way:
extern "C" int printf(const char*, ...);
int main()
{
static int a;
void(*f)(int) = [](auto) { printf("%d\n", a); };
a = 1;
f(0);
}
This has always failed, so isn't a regression, but for some reason the library
change in r232274 now hits this bug.
>From gcc-bugs-return-522807-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 14:16:51 2016
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Subject: [Bug c++/70735] [5/6/7 Regression] problem combining std::function, generic lambdas and static variables
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--- Comment #10 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Allan McRae from comment #6)
> gcc 5.3.1 built from a snapshot tarball is calling itself 5.3.0 unless you
> use "--with-pkgversion". I do not consider this a problem with Arch if gcc
> does not report the correct version with the default configure options.
Allan, surely this is the cause:
https://projects.archlinux.org/svntogit/packages.git/tree/gcc/trunk/PKGBUILD#n48
>From gcc-bugs-return-522808-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 14:30:03 2016
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Subject: [Bug c++/70735] [5/6/7 Regression] problem combining std::function, generic lambdas and static variables
Date: Wed, 20 Apr 2016 14:30:00 -0000
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--- Comment #11 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The local static variable seems to be captured by copy at the point when the
closure's call operator is instantiated, so it captures the current value of
the variable.
extern "C" int printf(const char*, ...);
int main()
{
static int a;
void(*f)(int) = [](auto) { printf("%d %p\n", a, (void*)&a); };
a = 1;
printf("%d %p\n", a, (void*)&a);
f(0);
}
1 0x601044
0 0x601048
The library change (and the conversion to a function pointer in this example)
force the instantiation to happen earlier than it did with GCC 5.3, so that the
variable is copied when it equals 0 rather than at the expression f(0) when it
equals 1.
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Subject: [Bug libstdc++/70503] [4.9/5 Regression] extern "C" functions in src/c++11/thread.cc are global in libstdc++.a
Date: Wed, 20 Apr 2016 14:31:00 -0000
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--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Wed Apr 20 14:30:33 2016
New Revision: 235284
URL: https://gcc.gnu.org/viewcvs?rev=235284&root=gcc&view=rev
Log:
Ensure std::thread helpers have internal linkage
Backport from mainline
2016-04-05 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/70503
* src/c++11/thread.cc (execute_native_thread_routine,
execute_native_thread_routine_compat): Give internal linkage.
* testsuite/30_threads/thread/70503.cc: New test.
Added:
branches/gcc-4_9-branch/libstdc++-v3/testsuite/30_threads/thread/70503.cc
Modified:
branches/gcc-4_9-branch/libstdc++-v3/ChangeLog
branches/gcc-4_9-branch/libstdc++-v3/src/c++11/thread.cc
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Subject: [Bug libstdc++/69478] [4.9/5 Regression] std::copy/std::move broken with trivial move-only types
Date: Wed, 20 Apr 2016 14:31:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69478
--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Wed Apr 20 14:30:39 2016
New Revision: 235285
URL: https://gcc.gnu.org/viewcvs?rev=235285&root=gcc&view=rev
Log:
Fix assertions for move assignment of trivial types
Backport from mainline
2016-01-26 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/69478
* include/bits/stl_algobase.h (__copy_move<_IsMove, true,
random_access_iterator_tag>): Check is_move_assignable when moving.
(__copy_move_backwards<_IsMove, true, random_access_iterator_tag>):
Likewise.
* testsuite/25_algorithms/copy/move_iterators/69478.cc: New.
* testsuite/25_algorithms/copy_backward/move_iterators/69478.cc: New.
* testsuite/25_algorithms/move/69478.cc: New.
* testsuite/25_algorithms/move_backward/69478.cc: New.
Added:
branches/gcc-4_9-branch/libstdc++-v3/testsuite/25_algorithms/copy/move_iterators/69478.cc
branches/gcc-4_9-branch/libstdc++-v3/testsuite/25_algorithms/copy_backward/move_iterators/69478.cc
branches/gcc-4_9-branch/libstdc++-v3/testsuite/25_algorithms/move/69478.cc
branches/gcc-4_9-branch/libstdc++-v3/testsuite/25_algorithms/move_backward/69478.cc
Modified:
branches/gcc-4_9-branch/libstdc++-v3/ChangeLog
branches/gcc-4_9-branch/libstdc++-v3/include/bits/stl_algobase.h
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Subject: [Bug libstdc++/69478] [4.9/5 Regression] std::copy/std::move broken with trivial move-only types
Date: Wed, 20 Apr 2016 14:31:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Fixed for 4.9.4 and 5.4
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Subject: [Bug tree-optimization/70700] ICE using -fdump-tree-all-graph option
Date: Wed, 20 Apr 2016 14:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70700
--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
struct S
{
long m;
};
struct S
fn1 (struct S *a)
{
if (a->m)
a->m |= 2;
return *a;
}
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Subject: [Bug libstdc++/70503] [4.9/5 Regression] extern "C" functions in src/c++11/thread.cc are global in libstdc++.a
Date: Wed, 20 Apr 2016 14:32:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #9 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Fixed for 4.9.4 and 5.4
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Subject: [Bug target/70454] --with-arch=native isn't applied to 32-bit x86 target library
Date: Wed, 20 Apr 2016 14:42:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70454
--- Comment #4 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> ---
Author: hjl
Date: Wed Apr 20 14:41:55 2016
New Revision: 235287
URL: https://gcc.gnu.org/viewcvs?rev=235287&root=gcc&view=rev
Log:
Don't build 32-bit libatomic with -march=i486 on x86-64
Gcc uses the same -march= for both -m32 and -m64 on x86-64 unless
--with-arch-32= is used. There is no need for -march=i486 to compile
32-bit libatomic on x86-64.
PR target/70454
* configure.tgt (XCFLAGS): Don't add -march=i486 to compile
32-bit x86 target library on x86-64.
Modified:
trunk/libatomic/ChangeLog
trunk/libatomic/configure.tgt
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Subject: [Bug tree-optimization/70700] ICE using -fdump-tree-all-graph option
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--- Comment #5 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
(gdb) p varmap.length()
$5 = 13
(gdb) p n
$6 = 21
so yeah - we're out-of-range.
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Subject: [Bug libstdc++/69703] char16_t conversions broken in filesystem::path
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--- Comment #6 from Andreas Schwab <schwab@linux-m68k.org> ---
The tests fail on m68k.
Output: 66855.exe:
/daten/aranym/gcc/gcc-20160420/libstdc++-v3/testsuite/22_locale/codecvt/codecvt_utf8_utf16/66855.cc:68:
void test02(): Assertion `buf[0] == utf16[0]' failed.
Output: 69703.exe:
/daten/aranym/gcc/gcc-20160420/libstdc++-v3/testsuite/22_locale/codecvt/codecvt_utf8/69703.cc:54:
void test02(): Assertion `in[0] == u'a'' failed.
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Subject: [Bug libstdc++/69703] char16_t conversions broken in filesystem::path
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--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Thanks, I'll fix it asap.
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Subject: [Bug bootstrap/70704] [6 Regression] AIX bootstrap comparison failure
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70704
--- Comment #29 from David Edelsohn <dje at gcc dot gnu.org> ---
Flex 2.6.0 works.
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From: "amker at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/56625] After if-conversion vectorizer doesn't recognize similar loads
Date: Wed, 20 Apr 2016 15:42:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56625
--- Comment #3 from amker at gcc dot gnu.org ---
Author: amker
Date: Wed Apr 20 15:41:45 2016
New Revision: 235289
URL: https://gcc.gnu.org/viewcvs?rev=235289&root=gcc&view=rev
Log:
PR tree-optimization/56625
PR tree-optimization/69489
* tree-data-ref.h (DR_INNERMOST): New macro.
* tree-if-conv.c (innermost_loop_behavior_hash): New class for
hashing struct innermost_loop_behavior.
(ref_DR_map): Remove.
(innermost_DR_map): New map.
(baseref_DR_map): Revise comment.
(hash_memrefs_baserefs_and_store_DRs_read_written_info): Store DR
to innermost_DR_map accroding to its innermost loop behavior.
(ifcvt_memrefs_wont_trap): Get DR from innermost_DR_map according
to its innermost loop behavior.
(if_convertible_loop_p_1): Remove intialization for ref_DR_map.
Add initialization for innermost_DR_map. Record memory reference
in DR_BASE_ADDRESS if the reference is compound one or it doesn't
have innermost loop behavior.
(if_convertible_loop_p): Remove release for ref_DR_map. Release
innermost_DR_map.
gcc/testsuite/ChangeLog
PR tree-optimization/56625
PR tree-optimization/69489
* gcc.dg/vect/pr56625.c: New test.
* gcc.dg/tree-ssa/ifc-pr69489-1.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/tree-ssa/ifc-pr69489-1.c
trunk/gcc/testsuite/gcc.dg/vect/pr56625.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-data-ref.h
trunk/gcc/tree-if-conv.c
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Subject: [Bug tree-optimization/69489] missed vectorization for boolean loop, missed if-conversion
Date: Wed, 20 Apr 2016 15:42:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69489
--- Comment #5 from amker at gcc dot gnu.org ---
Author: amker
Date: Wed Apr 20 15:41:45 2016
New Revision: 235289
URL: https://gcc.gnu.org/viewcvs?rev=235289&root=gcc&view=rev
Log:
PR tree-optimization/56625
PR tree-optimization/69489
* tree-data-ref.h (DR_INNERMOST): New macro.
* tree-if-conv.c (innermost_loop_behavior_hash): New class for
hashing struct innermost_loop_behavior.
(ref_DR_map): Remove.
(innermost_DR_map): New map.
(baseref_DR_map): Revise comment.
(hash_memrefs_baserefs_and_store_DRs_read_written_info): Store DR
to innermost_DR_map accroding to its innermost loop behavior.
(ifcvt_memrefs_wont_trap): Get DR from innermost_DR_map according
to its innermost loop behavior.
(if_convertible_loop_p_1): Remove intialization for ref_DR_map.
Add initialization for innermost_DR_map. Record memory reference
in DR_BASE_ADDRESS if the reference is compound one or it doesn't
have innermost loop behavior.
(if_convertible_loop_p): Remove release for ref_DR_map. Release
innermost_DR_map.
gcc/testsuite/ChangeLog
PR tree-optimization/56625
PR tree-optimization/69489
* gcc.dg/vect/pr56625.c: New test.
* gcc.dg/tree-ssa/ifc-pr69489-1.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/tree-ssa/ifc-pr69489-1.c
trunk/gcc/testsuite/gcc.dg/vect/pr56625.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-data-ref.h
trunk/gcc/tree-if-conv.c
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/70700] ICE using -fdump-tree-all-graph option
Date: Wed, 20 Apr 2016 15:42:00 -0000
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--- Comment #6 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Could be just
--- a/gcc/tree-ssa-structalias.c
+++ b/gcc/tree-ssa-structalias.c
@@ -2241,7 +2241,11 @@ dump_pred_graph (struct scc_info *si, FILE *file)
if (graph->points_to[i]
&& !bitmap_empty_p (graph->points_to[i]))
{
- fprintf (file, "[label=\"%s = {", get_varinfo (i)->name);
+ if (i < FIRST_REF_NODE)
+ fprintf (file, "[label=\"%s = {", get_varinfo (i)->name);
+ else
+ fprintf (file, "[label=\"*%s = {",
+ get_varinfo (i - FIRST_REF_NODE)->name);
unsigned j;
bitmap_iterator bi;
EXECUTE_IF_SET_IN_BITMAP (graph->points_to[i], 0, j, bi)
but someone would need to check whether we still print a correct info with
this.
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Subject: [Bug c++/69363] ICE when doing a pragma simd reduction with max
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69363
--- Comment #6 from iverbin at gcc dot gnu.org ---
Author: iverbin
Date: Wed Apr 20 15:48:53 2016
New Revision: 235290
URL: https://gcc.gnu.org/viewcvs?rev=235290&root=gcc&view=rev
Log:
Fix PR c++/69363
gcc/c-family/
PR c++/69363
* c-cilkplus.c (c_finish_cilk_clauses): Remove function.
* c-common.h (c_finish_cilk_clauses): Remove declaration.
gcc/c/
PR c++/69363
* c-parser.c (c_parser_cilk_all_clauses): Use c_finish_omp_clauses
instead of c_finish_cilk_clauses.
* c-tree.h (c_finish_omp_clauses): Add new default argument.
* c-typeck.c (c_finish_omp_clauses): Add new argument. Allow
floating-point variables in the linear clause for Cilk Plus.
gcc/cp/
PR c++/69363
* cp-tree.h (finish_omp_clauses): Add new default argument.
* parser.c (cp_parser_cilk_simd_all_clauses): Use finish_omp_clauses
instead of c_finish_cilk_clauses.
* semantics.c (finish_omp_clauses): Add new argument. Allow
floating-point variables in the linear clause for Cilk Plus.
gcc/testsuite/
PR c++/69363
* c-c++-common/cilk-plus/PS/clauses3.c: Adjust dg-error string.
* c-c++-common/cilk-plus/PS/clauses4.c: New test.
* c-c++-common/cilk-plus/PS/pr69363.c: New test.
Added:
trunk/gcc/testsuite/c-c++-common/cilk-plus/PS/clauses4.c
trunk/gcc/testsuite/c-c++-common/cilk-plus/PS/pr69363.c
Modified:
trunk/gcc/c-family/ChangeLog
trunk/gcc/c-family/c-cilkplus.c
trunk/gcc/c-family/c-common.h
trunk/gcc/c/ChangeLog
trunk/gcc/c/c-parser.c
trunk/gcc/c/c-tree.h
trunk/gcc/c/c-typeck.c
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/cp-tree.h
trunk/gcc/cp/parser.c
trunk/gcc/cp/semantics.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/c-c++-common/cilk-plus/PS/clauses3.c
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From: "amker at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/69489] missed vectorization for boolean loop, missed if-conversion
Date: Wed, 20 Apr 2016 15:57:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69489
--- Comment #6 from amker at gcc dot gnu.org ---
Author: amker
Date: Wed Apr 20 15:57:01 2016
New Revision: 235292
URL: https://gcc.gnu.org/viewcvs?rev=235292&root=gcc&view=rev
Log:
PR tree-optimization/69489
* tree-if-conv.c (phi_convertible_by_degenerating_args): New.
(if_convertible_phi_p): Call phi_convertible_by_degenerating_args.
Revise dump message.
(if_convertible_bb_p): Remove check on edge count of basic block's
predecessors.
gcc/testsuite/ChangeLog
PR tree-optimization/69489
* gcc.dg/tree-ssa/ifc-pr69489-2.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/tree-ssa/ifc-pr69489-2.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-if-conv.c
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug libgomp/65385] [libgomp] omp task untied test case fails
Date: Wed, 20 Apr 2016 16:25:00 -0000
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Jack Howarth <howarth.at.gcc at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |howarth.at.gcc at gmail dot com
--- Comment #5 from Jack Howarth <howarth.at.gcc at gmail dot com> ---
FYI, this test is now supported in llvm's openmp support in clang trunk as
of...
------------------------------------------------------------------------
r266853 | abataev | 2016-04-20 00:01:36 -0400 (Wed, 20 Apr 2016) | 5 lines
[OPENMP] Codegen for untied tasks.
If the untied clause is present on a task construct, any thread in the
team can resume the task region after a suspension. Patch adds proper
codegen for untied tasks.
It now produces the expected results of...
#Tested Directive t ct ot oct
omp_task_untied 100 100 100 100
on x86_64-apple-darwin15 for -m32 and -m64.
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Subject: [Bug c++/60796] Default move constructor not generated by explicit template instantiation
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60796
Daniel Vollmer <zerolo at gmail dot com> changed:
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----------------------------------------------------------------------------
CC| |zerolo at gmail dot com
--- Comment #2 from Daniel Vollmer <zerolo at gmail dot com> ---
I can confirm that this is broken even for g++ 5.3.0.
A defaulted default-constructor is also not generated.
>From gcc-bugs-return-522827-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 16:30:44 2016
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Subject: [Bug other/69582] [meta-bug] Cilk+
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Bug 69582 depends on bug 69363, which changed state.
Bug 69363 Summary: ICE when doing a pragma simd reduction with max
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69363
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iverbin at gcc dot gnu.org changed:
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--- Comment #7 from iverbin at gcc dot gnu.org ---
Fixed in GCC 7.
>From gcc-bugs-return-522828-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 16:45:44 2016
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Subject: [Bug ipa/70646] [4.9/5/6/7 Regression] Corrupt truncated function
Date: Wed, 20 Apr 2016 16:45:00 -0000
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--- Comment #29 from Martin Jambor <jamborm at gcc dot gnu.org> ---
Created attachment 38316
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38316&action=edit
Fix storing access size to conditions
Honza asked me to also come up with a version of the patch where we
store access size to the condition (as a HOST_WIDE_INT) and use that
for access size comparisons, so that we avoid any potential confusion
(for example if the loaded value is run through a NOP_EXPR after
loading but before the described use).
So this is it. It survives both regular and LTO bootstrap and testing
on an x86_64-linux.
>From gcc-bugs-return-522829-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 16:46:15 2016
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Subject: [Bug libstdc++/69703] char16_t conversions broken in filesystem::path
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--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
There's a silly typo that breaks the facets for big-endian targets, testing the
fix now.
>From gcc-bugs-return-522830-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 17:28:28 2016
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From: "gcc-bugs at engestrom dot ch" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/70740] New: ICE when compiling the Linux kernel (net/wireless/util.o)
Date: Wed, 20 Apr 2016 17:28:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70740
Bug ID: 70740
Summary: ICE when compiling the Linux kernel
(net/wireless/util.o)
Product: gcc
Version: 7.0
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Created attachment 38317
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38317&action=edit
Kernel .config
$ gcc --version
gcc (GCC) 7.0.0 20160420 (experimental)
GCC built with default options (ie. by just running `./configure; make`) from
commit a8876617811b8999e71d100cdd682b4e76c04b67
$ uname -rm
3.16.0-67-generic x86_64
To reproduce:
1 - Checkout commit 9a0e3eea25d3ab267aff9d4eaed83fbe46d989d0 from the Linux
kernel.
2 - Try to compile net/wireless/util.o (just `make` it)
3 - Segfault:
CC net/wireless/util.o
net/wireless/util.c: In function ‘__ieee80211_data_to_8023’:
net/wireless/util.c:417:12: internal compiler error: Segmentation fault
static int __ieee80211_data_to_8023(struct sk_buff *skb, struct ethhdr *ehdr,
^~~~~~~~~~~~~~~~~~~~~~~~
0xb21a4f crash_signal
../.././gcc/toplev.c:335
0x793156 dominated_by_p(cdi_direction, basic_block_def const*, basic_block_def
const*)
../.././gcc/dominance.c:973
0xca52b4 propagate_with_phi
../.././gcc/tree-ssa-phiprop.c:335
0xca52b4 execute
../.././gcc/tree-ssa-phiprop.c:447
I know I'm pushing my luck by using an unreleased compiler on an unreleased
kernel version, but it's still probably a bug that should be fixed :]
PS: Attached is the kernel .config I use. Probably not relevant, but this
allows for 100% reproducibility.
>From gcc-bugs-return-522831-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 17:34:09 2016
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Subject: [Bug c++/70468] [4.9/5/6/7 Regression] ICE on invalid code on x86_64-linux-gnu in emit_mem_initializers, at cp/init.c:1109
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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CC| |paolo.carlini at oracle dot com
--- Comment #3 from Paolo Carlini <paolo.carlini at oracle dot com> ---
The issue boils down to us wrongly accepting, eg:
template < typename = void >
class A
{
public:
A () : f0 ( 1 ) { }
A (int);
private:
typedef A<> f0;
};
A<> a;
>From gcc-bugs-return-522832-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 17:36:08 2016
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Subject: [Bug c/70740] ICE when compiling the Linux kernel (net/wireless/util.o)
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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Ever confirmed|0 |1
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
(In reply to Eric Engeström from comment #0)
> I know I'm pushing my luck by using an unreleased compiler on an unreleased
> kernel version, but it's still probably a bug that should be fixed :]
Sure, thanks for reporting.
> PS: Attached is the kernel .config I use. Probably not relevant, but this
> allows for 100% reproducibility.
The kernel .config is of no great use for us; could you please attach the
preprocessed testcase (should be generated automagically and stored into
/tmp/)?
>From gcc-bugs-return-522833-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 17:40:06 2016
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Subject: [Bug middle-end/70282] cc1plus hangs taking 100% CPU
Date: Wed, 20 Apr 2016 17:40:00 -0000
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--- Comment #3 from PeteVine <tulipawn at gmail dot com> ---
I've just tried building with g++ 5.3.0 and `-flto` which to my surprise didn't
hang unlike 5.3.0 without lto.
>From gcc-bugs-return-522834-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 17:40:55 2016
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Subject: [Bug libstdc++/69703] char16_t conversions broken in filesystem::path
Date: Wed, 20 Apr 2016 17:40:00 -0000
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--- Comment #9 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Wed Apr 20 17:40:02 2016
New Revision: 235293
URL: https://gcc.gnu.org/viewcvs?rev=235293&root=gcc&view=rev
Log:
Fix std::codecvt_utf8* for big-endian targets
PR libstdc++/69703
* src/c++11/codecvt.cc (__codecvt_utf8_base<char16_t>::do_in,
__codecvt_utf8_utf16_base<char16_t>::do_in): Fix mask operations.
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/src/c++11/codecvt.cc
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Subject: [Bug c/70740] ICE when compiling the Linux kernel (net/wireless/util.o)
Date: Wed, 20 Apr 2016 17:57:00 -0000
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |trippels at gcc dot gnu.org
--- Comment #2 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
You could run:
make V=1 net/wireless/util.o
and then add -v --save-temps to the gcc invocation.
Post the full output and attach the util.i file.
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Subject: [Bug c/70740] ICE when compiling the Linux kernel (net/wireless/util.o)
Date: Wed, 20 Apr 2016 18:10:00 -0000
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--- Comment #3 from Eric Engeström <gcc-bugs at engestrom dot ch> ---
(In reply to Marek Polacek from comment #1)
> The kernel .config is of no great use for us; could you please attach the
> preprocessed testcase (should be generated automagically and stored into
> /tmp/)?
The file is too big to be attached (4MB), so I had to use a pastebin:
http://paste.ubuntu.com/15954471/
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Subject: [Bug tree-optimization/70740] [7 Regression] ICE when compiling the Linux kernel (net/wireless/util.o)
Date: Wed, 20 Apr 2016 18:16:00 -0000
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |NEW
Component|c |tree-optimization
Summary|ICE when compiling the |[7 Regression] ICE when
|Linux kernel |compiling the Linux kernel
|(net/wireless/util.o) |(net/wireless/util.o)
--- Comment #4 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
markus@x4 tmp % cat util.i
struct {
char h_dest[6]
} d;
struct {
int addr1[0];
int addr2[0];
int addr3[0];
int addr4[]
} a, c;
b;
*ieee80211_get_SA() {
if (b)
return a.addr4;
return a.addr2;
}
__ieee80211_data_to_8023() {
int *e, *f;
if (ieee80211_has_tods())
e = c.addr3;
else
e = c.addr1;
memcpy(d.h_dest, e, 6);
f = ieee80211_get_SA();
memcpy(0, f, 1);
}
markus@x4 tmp % gcc -w -O2 -c util.i
util.i: In function ‘__ieee80211_data_to_8023’:
util.i:16:1: internal compiler error: Segmentation fault
__ieee80211_data_to_8023() {
^~~~~~~~~~~~~~~~~~~~~~~~
0xb21c0f crash_signal
../../gcc/gcc/toplev.c:335
0x7f7c24210eaf ???
/home/markus/glibc/signal/../sysdeps/unix/sysv/linux/x86_64/sigaction.c:0
0x7929b6 dominated_by_p(cdi_direction, basic_block_def const*, basic_block_def
const*)
../../gcc/gcc/dominance.c:973
0xca5964 propagate_with_phi
../../gcc/gcc/tree-ssa-phiprop.c:335
0xca5964 execute
../../gcc/gcc/tree-ssa-phiprop.c:447
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Subject: [Bug tree-optimization/70725] Internal compiler error (ICE) on valid code
Date: Wed, 20 Apr 2016 18:56:00 -0000
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
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CC| |hjl.tools at gmail dot com
Resolution|FIXED |---
--- Comment #8 from H.J. Lu <hjl.tools at gmail dot com> ---
It leads to ICE on 32-bit host:
[hjl@gnu-6 gcc]$ ./xgcc -B./
/export/gnu/import/git/sources/gcc/gcc/testsuite/gcc.dg/pr70725.c
-march=skylake-avx512 -O3
/export/gnu/import/git/sources/gcc/gcc/testsuite/gcc.dg/pr70725.c: In function
‘fn1’:
/export/gnu/import/git/sources/gcc/gcc/testsuite/gcc.dg/pr70725.c:13:1:
internal compiler error: in phi_convertible_by_degenerating_args, at
tree-if-conv.c:605
fn1 ()
^~~
0x879899b phi_convertible_by_degenerating_args
/export/gnu/import/git/sources/gcc/gcc/tree-if-conv.c:605
0x879899b if_convertible_phi_p
/export/gnu/import/git/sources/gcc/gcc/tree-if-conv.c:664
0x879899b if_convertible_loop_p_1
/export/gnu/import/git/sources/gcc/gcc/tree-if-conv.c:1408
0x8798f27 if_convertible_loop_p
/export/gnu/import/git/sources/gcc/gcc/tree-if-conv.c:1466
0x8798f27 tree_if_conversion
/export/gnu/import/git/sources/gcc/gcc/tree-if-conv.c:2774
0x8798f27 execute
/export/gnu/import/git/sources/gcc/gcc/tree-if-conv.c:2875
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
[hjl@gnu-6 gcc]$ ./xgcc -v
Using built-in specs.
COLLECT_GCC=./xgcc
Target: i686-linux
Configured with: /export/gnu/import/git/sources/gcc/configure
--enable-languages=c,c++ --disable-bootstrap i686-linux --prefix=/usr/gcc-7.0.0
--with-local-prefix=/usr/local --enable-gnu-indirect-function --enable-libmpx
--disable-libcc1 --disable-libcilkrts --disable-libsanitizer
--enable-clocale=gnu --with-system-zlib --with-demangler-in-ld
--with-fpmath=sse
Thread model: posix
gcc version 7.0.0 20160420 (experimental) (GCC)
[hjl@gnu-6 gcc]$
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Subject: [Bug tree-optimization/70725] Internal compiler error (ICE) on valid code
Date: Wed, 20 Apr 2016 19:09:00 -0000
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H.J. Lu <hjl.tools at gmail dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #9 from H.J. Lu <hjl.tools at gmail dot com> ---
gdb) f 1
#1 0x089eab96 in phi_convertible_by_degenerating_args (phi=0xf7895e00)
at /export/gnu/import/git/sources/gcc/gcc/tree-if-conv.c:605
605 gcc_assert (num_args > 2);
(gdb) p num_args
$3 = 1
(gdb)
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Subject: [Bug c++/55635] Deallocation function ("operator delete") not called when destructor throws exception
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--- Comment #5 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Author: nathan
Date: Wed Apr 20 19:59:56 2016
New Revision: 235297
URL: https://gcc.gnu.org/viewcvs?rev=235297&root=gcc&view=rev
Log:
cp/
PR c++/55635
* init.c (build_vec_delete_1): Protect operator delete call in try
finally.
(build_delete): Likewise.
* optimize.c (build_delete_destructor_body): Likewise.
testsuite/
PR c++/55635
* g++.dg/eh/delete1.C: New.
Added:
trunk/gcc/testsuite/g++.dg/eh/delete1.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/init.c
trunk/gcc/cp/optimize.c
trunk/gcc/testsuite/ChangeLog
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Nathan Sidwell <nathan at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #6 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
fixed r235297.
>From gcc-bugs-return-522842-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 20:25:25 2016
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Subject: [Bug tree-optimization/70740] [7 Regression] ICE when compiling the Linux kernel (net/wireless/util.o)
Date: Wed, 20 Apr 2016 20:25:00 -0000
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--- Comment #5 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Cleaned up testcase:
extern int foo (void);
extern void *memcpy (void *, const void *, __SIZE_TYPE__);
struct
{
char a[6];
} d;
struct
{
int a1[0];
int a2[0];
int a3[0];
int a4[];
} a, c;
int b;
int *
bar ()
{
if (b)
return a.a4;
return a.a2;
}
void
baz ()
{
int *e, *f;
if (foo ())
e = c.a3;
else
e = c.a1;
memcpy (d.a, e, 6);
f = bar ();
memcpy (d.a, f, 1);
}
>From gcc-bugs-return-522843-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 21:13:13 2016
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Subject: [Bug target/50774] Internal Compiler Error when march½ver1
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Victoria <victoria.stepanyan at amd dot com> changed:
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----------------------------------------------------------------------------
CC| |victoria.stepanyan at amd dot com
--- Comment #1 from Victoria <victoria.stepanyan at amd dot com> ---
Not seen on recent trunk
>From gcc-bugs-return-522845-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 21:14:54 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/66067] [6 Regression] tree check ICE: accessed elt 1 of tree_vec with 0 elts in write_template_args, at cp/mangle.c:2574
Date: Wed, 20 Apr 2016 21:14:00 -0000
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Victoria <victoria.stepanyan at amd dot com> changed:
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--- Comment #14 from Victoria <victoria.stepanyan at amd dot com> ---
issue not seen in GCC 5.x branch, is possible to backport the patch?
>From gcc-bugs-return-522844-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 21:14:15 2016
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Subject: [Bug target/52910] xop-mul-1:f13 miscompiled on bulldozer (-mxop)
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Victoria <victoria.stepanyan at amd dot com> changed:
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--- Comment #3 from Victoria <victoria.stepanyan at amd dot com> ---
The issue is not seen on recent trunk
>From gcc-bugs-return-522846-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 21:20:48 2016
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From: "donald.chai at synopsys dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70741] New: segfault when jumping into statement expression in array initializer
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Bug ID: 70741
Summary: segfault when jumping into statement expression in
array initializer
Product: gcc
Version: 5.2.1
Status: UNCONFIRMED
Severity: minor
Priority: P3
Component: c++
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Preface:
1) Apologies if this is the wrong component.
2) Yes, this code is crazy. I was testing our own compiler. :)
GCC 5.x segfaults on the below code in C++ mode.
$ cat test.c
void testE_statement() {
int x[10] = {
({ L: 0; })
};
goto L;
}
$ gcc-5 -c test.c
test.c: In function ‘testE_statement’:
test.c:5:5: error: jump into statement expression
goto L;
^
test.c:3:12: note: label ‘L’ defined here
({ L: 0; })
$ gcc-5 -c -x c++ test.c
test.c: In function ‘void testE_statement()’:
test.c:1:6: internal compiler error: Segmentation fault
void testE_statement() {
^
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-5/README.Bugs> for instructions.
$ gcc-5 --version
gcc-5 (Ubuntu 5.2.1-23ubuntu1~12.04) 5.2.1 20151031
Copyright (C) 2015 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
GCC 4.9 appears to do something somewhat reasonable:
$ cat test.cpp
#include <cstdio>
int main() {
int iters = 0;
int x[10] = {
({ printf("0\n"); iters; }),
({ L: iters++; printf("1\n"); iters; })
};
if (iters < 2)
goto L;
printf("x[0]: %d\n", x[0]);
printf("x[1]: %d\n", x[1]);
}
$ gcc-4.9 test.cpp
$ ./a.out
0
1
1
x[0]: 0
x[1]: 2
>From gcc-bugs-return-522847-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 21:29:55 2016
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From: "daniel.gutson at tallertechnologies dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/70742] New: Add a builtin for obtaining a quotient and remainder of an integer division
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Bug ID: 70742
Summary: Add a builtin for obtaining a quotient and remainder
of an integer division
Product: gcc
Version: 6.0
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Priority: P3
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Created attachment 38318
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38318&action=edit
example with disassembly listing
This idea has been originated here
https://sourceware.org/ml/libc-alpha/2016-04/msg00503.html
and later from here
https://sourceware.org/bugzilla/show_bug.cgi?id=19974
Due to suggestions in both the libc-alpha mailing list and in the glibc issue
tracker, I created this issue here as a compiler enhencement.
Basically the idea is to create the __builtin_div builtins family, so they
finally get translated to a single asm insn (if available) that calculates both
the quotient and the remainder. I attach the same file that is attached in the
glibc's bug tracker.
The goal is that std::div and cstdlib's div can be reimplemented as calling
this builtin.
>From gcc-bugs-return-522848-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 22:02:33 2016
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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/70742] Support div as a builtin
Date: Wed, 20 Apr 2016 22:02:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-20
Summary|Add a builtin for obtaining |Support div as a builtin
|a quotient and remainder of |
|an integer division |
Ever confirmed|0 |1
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Let me reword the summary. what you want is div and ldiv and imaxdiv to be
supported as a builtin, in that it expands correctly to do the div/mod inlined.
>The goal is that std::div and cstdlib's div can be reimplemented as calling this builtin.
Or rather they stay the way they are and GCC rewrites it to be correct. AKA no
reimplementing at all.
>From gcc-bugs-return-522849-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 22:05:32 2016
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From: "daniel.gutson at tallertechnologies dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/70742] Support div as a builtin
Date: Wed, 20 Apr 2016 22:05:00 -0000
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--- Comment #2 from Daniel Gutson <daniel.gutson at tallertechnologies dot com> ---
(In reply to Andrew Pinski from comment #1)
> Let me reword the summary. what you want is div and ldiv and imaxdiv to be
> supported as a builtin, in that it expands correctly to do the div/mod
> inlined.
>
> >The goal is that std::div and cstdlib's div can be reimplemented as calling this builtin.
>
> Or rather they stay the way they are and GCC rewrites it to be correct. AKA
> no reimplementing at all.
That's correct, my bad: the goal is actually not touching the library at all.
>From gcc-bugs-return-522850-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 22:05:51 2016
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Subject: [Bug tree-optimization/70725] Internal compiler error (ICE) on valid code
Date: Wed, 20 Apr 2016 22:05:00 -0000
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--- Comment #10 from H.J. Lu <hjl.tools at gmail dot com> ---
It also fails on x86-64:
/export/build/gnu/gcc/build-x86_64-linux/gcc/xgcc
-B/export/build/gnu/gcc/build-x86_64-linux/gcc/
/export/gnu/import/git/sources/gcc/gcc/testsuite/gcc.dg/pr70725.c
-fno-diagnostics-show-caret -fdiagnostics-color=never -O3 -march=skylake-avx512
-S -o pr70725.s
/export/gnu/import/git/sources/gcc/gcc/testsuite/gcc.dg/pr70725.c: In function
‘fn1’:
/export/gnu/import/git/sources/gcc/gcc/testsuite/gcc.dg/pr70725.c:13:1:
internal compiler error: in phi_convertible_by_degenerating_args, at
tree-if-conv.c:605
0xec7591 phi_convertible_by_degenerating_args
/export/gnu/import/git/sources/gcc/gcc/tree-if-conv.c:605
0xec7761 if_convertible_phi_p
/export/gnu/import/git/sources/gcc/gcc/tree-if-conv.c:664
0xec9249 if_convertible_loop_p_1
/export/gnu/import/git/sources/gcc/gcc/tree-if-conv.c:1408
0xec9444 if_convertible_loop_p
/export/gnu/import/git/sources/gcc/gcc/tree-if-conv.c:1466
0xeccdc7 tree_if_conversion
/export/gnu/import/git/sources/gcc/gcc/tree-if-conv.c:2774
0xecd062 execute
/export/gnu/import/git/sources/gcc/gcc/tree-if-conv.c:2875
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
[hjl@gnu-6 gcc]$
>From gcc-bugs-return-522851-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 22:08:51 2016
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From: "daniel.gutson at tallertechnologies dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/70742] Support div as a builtin
Date: Wed, 20 Apr 2016 22:08:00 -0000
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--- Comment #3 from Daniel Gutson <daniel.gutson at tallertechnologies dot com> ---
(In reply to Andrew Pinski from comment #1)
> Let me reword the summary. what you want is div and ldiv and imaxdiv to be
and lldiv
> supported as a builtin, in that it expands correctly to do the div/mod
> inlined.
>
> >The goal is that std::div and cstdlib's div can be reimplemented as calling this builtin.
>
> Or rather they stay the way they are and GCC rewrites it to be correct. AKA
> no reimplementing at all.
>From gcc-bugs-return-522852-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 22:10:40 2016
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Subject: [Bug c/70742] Support div as a builtin
Date: Wed, 20 Apr 2016 22:10:00 -0000
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--- Comment #4 from Daniel Gutson <daniel.gutson at tallertechnologies dot com> ---
Please assign this to andres.tiraboschi@tallertechnologies.com
>From gcc-bugs-return-522853-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 22:18:03 2016
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Subject: [Bug c/70742] Support div as a builtin
Date: Wed, 20 Apr 2016 22:18:00 -0000
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--- Comment #5 from Marc Glisse <glisse at gcc dot gnu.org> ---
It seems to me that the reason we don't already have div as a builtin is that
we need to know the layout of div_t.
In a header, you don't really need inline asm:
inline div_t div(int a, int b){ div_t q; q.quot=a/b; q.rem=a%b; return q; }
>From gcc-bugs-return-522854-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 22:21:02 2016
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Subject: [Bug c/70742] Support div as a builtin
Date: Wed, 20 Apr 2016 22:21:00 -0000
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--- Comment #6 from Daniel Gutson <daniel.gutson at tallertechnologies dot com> ---
(In reply to Marc Glisse from comment #5)
> It seems to me that the reason we don't already have div as a builtin is
> that we need to know the layout of div_t.
>
> In a header, you don't really need inline asm:
> inline div_t div(int a, int b){ div_t q; q.quot=a/b; q.rem=a%b; return q; }
:) that was the whole discussion with the glibc maintainers: they don't want
inline functions. Please look at the discussions there, and consider to join.
>From gcc-bugs-return-522855-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 22:24:37 2016
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Subject: [Bug target/70743] New: Extend -fno-plt to function pointer
Date: Wed, 20 Apr 2016 22:24:00 -0000
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Bug ID: 70743
Summary: Extend -fno-plt to function pointer
Product: gcc
Version: 7.0
Status: UNCONFIRMED
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Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
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CC: ubizjak at gmail dot com
Target Milestone: ---
Target: x86
Even when -fno-plt is used, GCC still generates PLT for function
pointer:
[hjl@gnu-6 plt-2]$ cat x.i
extern void foo (void);
void *
_start (void)
{
foo ();
return foo;
}
[hjl@gnu-6 plt-2]$ cat foo.c
void
foo (void)
{
}
[hjl@gnu-6 plt-2]$ make
/export/build/gnu/gcc/build-x86_64-linux/gcc/xgcc
-B/export/build/gnu/gcc/build-x86_64-linux/gcc/ -O2 -fno-plt -c -o x.o x.i
/export/build/gnu/gcc/build-x86_64-linux/gcc/xgcc
-B/export/build/gnu/gcc/build-x86_64-linux/gcc/ -O2 -fno-plt -fPIC -c -o
foo.o foo.c
ld -shared -o foo.so foo.o
ld -o x x.o foo.so
readelf -r x
Relocation section '.rela.dyn' at offset 0x268 contains 1 entries:
Offset Info Type Sym. Value Sym. Name +
Addend
000000600470 000200000006 R_X86_64_GLOB_DAT 00000000004002b0 foo + 0
Relocation section '.rela.plt' at offset 0x280 contains 1 entries:
Offset Info Type Sym. Value Sym. Name +
Addend
000000600490 000200000007 R_X86_64_JUMP_SLO 00000000004002b0 foo + 0
objdump -dw x
x: file format elf64-x86-64
Disassembly of section .plt:
00000000004002a0 <foo@plt-0x10>:
4002a0: ff 35 da 01 20 00 pushq 0x2001da(%rip) # 600480
<_GLOBAL_OFFSET_TABLE_+0x8>
4002a6: ff 25 dc 01 20 00 jmpq *0x2001dc(%rip) # 600488
<_GLOBAL_OFFSET_TABLE_+0x10>
4002ac: 0f 1f 40 00 nopl 0x0(%rax)
00000000004002b0 <foo@plt>:
4002b0: ff 25 da 01 20 00 jmpq *0x2001da(%rip) # 600490
<_GLOBAL_OFFSET_TABLE_+0x18>
4002b6: 68 00 00 00 00 pushq $0x0
4002bb: e9 e0 ff ff ff jmpq 4002a0 <foo@plt-0x10>
Disassembly of section .text:
00000000004002c0 <_start>:
4002c0: 48 83 ec 08 sub $0x8,%rsp
4002c4: ff 15 a6 01 20 00 callq *0x2001a6(%rip) # 600470
<_DYNAMIC+0x140>
4002ca: b8 b0 02 40 00 mov $0x4002b0,%eax
4002cf: 48 83 c4 08 add $0x8,%rsp
4002d3: c3 retq
[hjl@gnu-6 plt-2]$
GCC can generate
movq foo@GOTPCREL(%rip), %rax
for function pointer. It will remove PLT and only needs one run-time
relocation:
readelf -r x
Relocation section '.rela.dyn' at offset 0x268 contains 1 entries:
Offset Info Type Sym. Value Sym. Name +
Addend
0000006003c8 000200000006 R_X86_64_GLOB_DAT 0000000000000000 foo + 0
objdump -dw x
x: file format elf64-x86-64
Disassembly of section .text:
0000000000400280 <_start>:
400280: 48 83 ec 08 sub $0x8,%rsp
400284: ff 15 3e 01 20 00 callq *0x20013e(%rip) # 6003c8
<_DYNAMIC+0x100>
40028a: 48 8b 05 37 01 20 00 mov 0x200137(%rip),%rax #
6003c8 <_DYNAMIC+0x100>
400291: 48 83 c4 08 add $0x8,%rsp
400295: c3 retq
[hjl@gnu-6 plt-2]$
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From: "donald.chai at synopsys dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70744] New: preincrements possibly double-evaluated in GNU ternaries
Date: Wed, 20 Apr 2016 22:29:00 -0000
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Bug ID: 70744
Summary: preincrements possibly double-evaluated in GNU
ternaries
Product: gcc
Version: 5.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
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GCC, in C++ mode, appears to evaluate pre-increments twice in GNU ternaries:
$ gcc-5 --version
gcc-5 (Ubuntu 5.2.1-23ubuntu1~12.04) 5.2.1 20151031
Copyright (C) 2015 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
$ cat test.c
int main() {
int x = 1;
++x ?: 1337;
return x;
}
$ gcc-5 -x c test.c; ./a.out; echo $?
2
$ gcc-5 -x c++ test.c; ./a.out; echo $?
3
Clang appears to work:
$ clang --version
Ubuntu clang version 3.4-1ubuntu3~precise2 (tags/RELEASE_34/final) (based on
LLVM 3.4)
Target: x86_64-pc-linux-gnu
Thread model: posix
$ clang -x c++ test.c; ./a.out; echo $?
test.c:3:5: warning: expression result unused [-Wunused-value]
++x ?: 1337;
^~~~~~~~~~~
1 warning generated.
2
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From: "hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/67400] -fno-plt doesn't work with function pointers
Date: Wed, 20 Apr 2016 22:50:00 -0000
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--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> ---
*** Bug 70743 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-522858-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 22:50:09 2016
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From: "hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70743] Extend -fno-plt to function pointer
Date: Wed, 20 Apr 2016 22:50:00 -0000
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
Dup.
*** This bug has been marked as a duplicate of bug 67400 ***
>From gcc-bugs-return-522859-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 23:02:07 2016
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From: "manu at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/30354] -Os doesn't optimize a/CONST even if it saves size.
Date: Wed, 20 Apr 2016 23:02:00 -0000
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed|2012-06-29 00:00:00 |2016-4-21
CC| |manu at gcc dot gnu.org
--- Comment #20 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
(In reply to Bernhard Reutner-Fischer from comment #19)
> (In reply to Denis Vlasenko from comment #17)
> > Any chance of this being finally done?
> >
> > I proposed a simple, working patch in 2007, it's 2016 now and all these
> > years users of -Os suffer from slow divisions in important cases usch as
> > "signed_int / 16" and "unsigned_int / 10".
>
> > So.
> > Any chance of this patch being accepted sometime before 2100? ;)
>
> For GCC you need to follow https://gcc.gnu.org/contribute.html to submit
> patches.
There is also a 10-step guide for new contributors here:
https://gcc.gnu.org/wiki/GettingStarted#Basics:_Contributing_to_GCC_in_10_easy_steps
>From gcc-bugs-return-522860-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 20 23:28:55 2016
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From: "frrrwww at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/70745] New: Wrong handling of regex_constant::match_not_eow and regex_constant::match_not_bow
Date: Wed, 20 Apr 2016 23:28:00 -0000
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Bug ID: 70745
Summary: Wrong handling of regex_constant::match_not_eow and
regex_constant::match_not_bow
Product: gcc
Version: 6.1.0
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Hello,
it seems the current regex implementation of libstdc++ does not handle
correctly the match_not_eow and match_not_bow flags.
in the _Executor _M_word_boundary method, it looks like the logic handles these
flags as disabling \b matching for beginning/end of words in general, when the
flags are intended to disable it only on the first/last position of the subject
text.
>From gcc-bugs-return-522861-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 00:02:23 2016
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Subject: [Bug gcov-profile/69004] Building t-engine on ARM fails during -fprofile-use stage
Date: Thu, 21 Apr 2016 00:02:00 -0000
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--- Comment #14 from PeteVine <tulipawn at gmail dot com> ---
Tried it again using gcc 5.3.0:
==== Building physfs (release) ====
physfs.c
../src/physfs/physfs.c:76:5: warning: initialization from incompatible pointer
type [-Wincompatible-pointer-types]
&__PHYSFS_Archiver_BIND_PHYSFS,
^
../src/physfs/physfs.c:76:5: note: (near initialization for
‘supported_types[0]’)
../src/physfs/physfs.c: In function ‘PHYSFS_seek’:
../src/physfs/physfs.c:2121:11: error: corrupted value profile: ic profile
counter (1460761 out of 1460759) inconsistent with basic-block count (1460759)
return(fh->funcs->seek(fh->opaque, pos));
^
../src/physfs/physfs.c: In function ‘PHYSFS_eof’:
../src/physfs/physfs.c:2292:1: error: corrupted profile info: profile data is
not flow-consistent
}
^
../src/physfs/physfs.c:2292:1: error: corrupted profile info: number of
executions for edge 3-4 thought to be 26871
../src/physfs/physfs.c:2292:1: error: corrupted profile info: number of
executions for edge 3-7 thought to be -2
../src/physfs/physfs.c: In function ‘sanitizePlatformIndependentPath’:
../src/physfs/physfs.c:2292:1: error: corrupted profile info: profile data is
not flow-consistent
../src/physfs/physfs.c:2292:1: error: corrupted profile info: number of
executions for edge 7-8 thought to be -19
../src/physfs/physfs.c:2292:1: error: corrupted profile info: number of
executions for edge 7-9 thought to be 8089263
../src/physfs/physfs.c:2292:1: error: corrupted profile info: number of
iterations for basic block 8 thought to be -18
make[1]: *** [../obj/Release/physfs/physfs.o] Error 1
>From gcc-bugs-return-522862-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 00:22:46 2016
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Subject: [Bug c++/69078] [C++14] function local static not initialized when only used in a generic/variadic lambda
Date: Thu, 21 Apr 2016 00:22:00 -0000
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Adam H. Peterson <alphaetapi at hotmail dot com> changed:
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----------------------------------------------------------------------------
CC| |alphaetapi at hotmail dot com
--- Comment #1 from Adam H. Peterson <alphaetapi at hotmail dot com> ---
I'm seeing this too, in one of my work projects. And I also see the odd
results when the variable is used both in the lambda and outside of it.
#include <iostream>
template<typename F>
void run( F &&f ) {
f(nullptr);
}
struct V {
int i;
};
int main() {
static V const s={2};
std::cout << s.i << "\n";
run([](auto){
std::cout << s.i << "\n" ;
});
}
Expected output:
2
2
Actual output:
2
0
(The in-function use seems to have been inlined, while the lambda continues to
access an uninitialized state.)
>From gcc-bugs-return-522863-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 00:24:56 2016
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Subject: [Bug tree-optimization/26854] Inordinate compile times on large routines
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Adam H. Peterson <alphaetapi at hotmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |alphaetapi at hotmail dot com
--- Comment #137 from Adam H. Peterson <alphaetapi at hotmail dot com> ---
Incidentally, my GCC version is 5.3:
$ g++ --version
g++ (Debian 5.3.1-13) 5.3.1 20160323
Copyright (C) 2015 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
My OS is Debian/Testing:
$ uname -a
Linux XXXXXXXX-desktop 4.4.0-1-amd64 #1 SMP Debian 4.4.6-1 (2016-03-17)
x86_64 GNU/Linux
>From gcc-bugs-return-522864-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 00:25:26 2016
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From: "alphaetapi at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/69078] [C++14] function local static not initialized when only used in a generic/variadic lambda
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--- Comment #2 from Adam H. Peterson <alphaetapi at hotmail dot com> ---
Incidentally, my GCC version is 5.3:
$ g++ --version
g++ (Debian 5.3.1-13) 5.3.1 20160323
Copyright (C) 2015 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
My OS is Debian/Testing:
$ uname -a
Linux XXXXXXXX-desktop 4.4.0-1-amd64 #1 SMP Debian 4.4.6-1 (2016-03-17)
x86_64 GNU/Linux
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From: "alphaetapi at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/26854] Inordinate compile times on large routines
Date: Thu, 21 Apr 2016 00:26:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=26854
--- Comment #138 from Adam H. Peterson <alphaetapi at hotmail dot com> ---
Disregard my comment above. I was dropped into the wrong bug.
>From gcc-bugs-return-522866-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 00:30:58 2016
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From: "ch3root at openwall dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug sanitizer/70746] New: UBSAN runtime fail: undefined symbol: __ubsan_handle_nonnull_arg
Date: Thu, 21 Apr 2016 00:30:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70746
Bug ID: 70746
Summary: UBSAN runtime fail: undefined symbol:
__ubsan_handle_nonnull_arg
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: sanitizer
Assignee: unassigned at gcc dot gnu.org
Reporter: ch3root at openwall dot com
CC: dodji at gcc dot gnu.org, dvyukov at gcc dot gnu.org,
jakub at gcc dot gnu.org, kcc at gcc dot gnu.org
Target Milestone: ---
$ cat fprintf-zero-ptr.c
#include <stdio.h>
int main()
{
fprintf(0, "Hi\n");
}
$ gcc --version
gcc (GCC) 7.0.0 20160420 (experimental)
Copyright (C) 2016 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
$ gcc -fsanitize=undefined fprintf-zero-ptr.c && ./a.out
./a.out: symbol lookup error: ./a.out: undefined symbol:
__ubsan_handle_nonnull_arg
>From gcc-bugs-return-522867-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 05:20:21 2016
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Subject: [Bug libstdc++/70745] Wrong handling of regex_constant::match_not_eow and regex_constant::match_not_bow
Date: Thu, 21 Apr 2016 05:20:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70745
Tim Shen <timshen at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2016-04-21
CC| |timshen at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Tim Shen <timshen at gcc dot gnu.org> ---
Looking at the history I noticed that it was handled correctly, but later get
changed to the current incorrect semantic. Sorry, I must lose some earlier
memoery. :P
>From gcc-bugs-return-522868-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 05:39:34 2016
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Subject: [Bug c/70747] New: ICE on valid code on x86_64-linux-gnu: verify_gimple failed
Date: Thu, 21 Apr 2016 05:39:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70747
Bug ID: 70747
Summary: ICE on valid code on x86_64-linux-gnu: verify_gimple
failed
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Target Milestone: ---
The following code causes an ICE when compiled with the current gcc trunk on
x86_64-linux-gnu in both 32-bit and 64-bit modes.
It is a regression from 5.3.x.
$ gcc-trunk -v
Using built-in specs.
COLLECT_GCC=gcc-trunk
COLLECT_LTO_WRAPPER=/usr/local/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/7.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto
--prefix=/usr/local/gcc-trunk --disable-bootstrap
Thread model: posix
gcc version 7.0.0 20160420 (experimental) [trunk revision 235250] (GCC)
$
$ gcc-5.3 -c -w small.c
$
$ gcc-trunk -c -w small.c
small.c: In function ‘fn1’:
small.c:3:6: error: non-trivial conversion at assignment
void fn1 ()
^~~
int
_Bool
b = 0;
small.c:3:6: internal compiler error: verify_gimple failed
0xba21fd verify_gimple_in_seq(gimple*)
../../gcc-source-trunk/gcc/tree-cfg.c:4792
0x8fb77b gimplify_body(tree_node*, bool)
../../gcc-source-trunk/gcc/gimplify.c:11501
0x8fbb36 gimplify_function_tree(tree_node*)
../../gcc-source-trunk/gcc/gimplify.c:11589
0x77a867 cgraph_node::analyze()
../../gcc-source-trunk/gcc/cgraphunit.c:625
0x77d3d0 analyze_functions
../../gcc-source-trunk/gcc/cgraphunit.c:1086
0x77e638 symbol_table::finalize_compilation_unit()
../../gcc-source-trunk/gcc/cgraphunit.c:2542
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
$
------------------------------------------
int *a, b;
void fn1 ()
{
a = __builtin_malloc (sizeof(int)*2);
b = &a[1] == (0, 0);
}
>From gcc-bugs-return-522869-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 08:03:29 2016
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Subject: [Bug libstdc++/60936] [4.9/5/6/7 Regression] Binary code bloat with std::string
Date: Thu, 21 Apr 2016 08:03:00 -0000
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--- Comment #17 from __vic <d.v.a at ngs dot ru> ---
Created attachment 38319
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38319&action=edit
Dirty patch for GCC 5/6
This dirty patch created for GCC5 solves the problem for GCC6 as well.
(out_of_range will not contain pretty message)
>From gcc-bugs-return-522870-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 08:13:52 2016
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From: "antony at cosmologist dot info" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/70748] New: GCC6 Regression: ICE with debug in gfc_trans_block_construct
Date: Thu, 21 Apr 2016 08:13:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70748
Bug ID: 70748
Summary: GCC6 Regression: ICE with debug in
gfc_trans_block_construct
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
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Run "make Debug" on code at https://github.com/cmbant/forutils/
gfortran -cpp -ffree-line-length-none -fmax-errors=4 -MMD -g -O0 -o
IniObjects.o -c ../IniObjects.f90
../IniObjects.f90:348:0:
S = S(i+2:)
internal compiler error: in gfc_trans_block_construct, at
fortran/trans-stmt.c:1788
0x6e30e1 gfc_trans_block_construct(gfc_code*)
../../gcc/fortran/trans-stmt.c:1788
0x67f637 trans_code
../../gcc/fortran/trans.c:1785
0x6dac43 gfc_trans_if_1
../../gcc/fortran/trans-stmt.c:1299
0x6dac54 gfc_trans_if_1
../../gcc/fortran/trans-stmt.c:1303
0x6e188a gfc_trans_if(gfc_code*)
../../gcc/fortran/trans-stmt.c:1330
0x67f6a7 trans_code
../../gcc/fortran/trans.c:1777
0x6dac43 gfc_trans_if_1
../../gcc/fortran/trans-stmt.c:1299
0x6e188a gfc_trans_if(gfc_code*)
../../gcc/fortran/trans-stmt.c:1330
0x67f6a7 trans_code
../../gcc/fortran/trans.c:1777
0x6e3e2d gfc_trans_do_while(gfc_code*)
../../gcc/fortran/trans-stmt.c:2294
0x67f657 trans_code
../../gcc/fortran/trans.c:1797
0x6dac43 gfc_trans_if_1
../../gcc/fortran/trans-stmt.c:1299
0x6e188a gfc_trans_if(gfc_code*)
../../gcc/fortran/trans-stmt.c:1330
0x67f6a7 trans_code
../../gcc/fortran/trans.c:1777
0x6a302c gfc_generate_function_code(gfc_namespace*)
../../gcc/fortran/trans-decl.c:6154
0x682b21 gfc_generate_module_code(gfc_namespace*)
../../gcc/fortran/trans.c:2058
0x63b54d translate_all_program_units
../../gcc/fortran/parse.c:5600
0x63b54d gfc_parse_file()
../../gcc/fortran/parse.c:5819
0x67c985 gfc_be_parse_file
../../gcc/fortran/f95-lang.c:201
Please submit a full bug report,
with preprocessed source if appropriate.
Appeared sometime in gcc in the last couple of months, also in v7 master.
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Subject: [Bug c++/70018] [4.9/5/6/7 Regression] Possible issue around IPO and C++ comdats discovered as pure/const
Date: Thu, 21 Apr 2016 09:05:00 -0000
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--- Comment #16 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Author: hubicka
Date: Thu Apr 21 09:05:07 2016
New Revision: 235318
URL: https://gcc.gnu.org/viewcvs?rev=235318&root=gcc&view=rev
Log:
PR ipa/70018
* cgraph.c (cgraph_set_nothrow_flag_1): Rename to ...
(set_nothrow_flag_1): ... this; handle interposition correctly;
recurse on aliases and thunks.
(cgraph_node::set_nothrow_flag): New.
* ipa-pure-const.c (ignore_edge_for_nothrow): Ignore calls to
functions compiled with non-call exceptions that binds to current
def.
(propagate_nothrow): Be safe WRT interposition.
* cgraph.h (set_nothrow_flag): Update prototype.
* g++.dg/ipa/nothrow-1.C: New testcase.
Added:
trunk/gcc/testsuite/g++.dg/ipa/nothrow-1.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/cgraph.c
trunk/gcc/cgraph.h
trunk/gcc/ipa-pure-const.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug sanitizer/70746] UBSAN runtime fail: undefined symbol: __ubsan_handle_nonnull_arg
Date: Thu, 21 Apr 2016 09:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70746
Alexander Cherepanov <ch3root at openwall dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #1 from Alexander Cherepanov <ch3root at openwall dot com> ---
I figured it out. New gcc was installed in parallel with the system one and due
to wrong LD_LIBRARY_PATH settings, an old system libubsan.so was used. With the
right libubsan.so everything works fine. Sorry for the noise!
>From gcc-bugs-return-522873-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 09:19:03 2016
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/70725] Internal compiler error (ICE) on valid code
Date: Thu, 21 Apr 2016 09:19:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70725
--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
I think that's a separate issue. if-conversion is confused about
.MEM_198 = PHI <.MEM_191(43)>
which it should simply ignore.
Index: tree-if-conv.c
===================================================================
--- tree-if-conv.c (revision 235305)
+++ tree-if-conv.c (working copy)
@@ -659,7 +659,7 @@ if_convertible_phi_p (struct loop *loop,
if (bb != loop->header)
{
- if (gimple_phi_num_args (phi) != 2
+ if (gimple_phi_num_args (phi) > 2
&& !aggressive_if_conv
&& !phi_convertible_by_degenerating_args (phi))
{
should fix the ICE but it leads to another latent issue:
/space/rguenther/src/svn/trunk/gcc/testsuite/gcc.dg/pr70725.c: In function
'fn1':
/space/rguenther/src/svn/trunk/gcc/testsuite/gcc.dg/pr70725.c:13:1: error:
statement uses released SSA name:
# .MEM_202 = VDEF <.MEM_198>
# lhs access alignment 32+0
c[_73] = _ifc__387;
The use of .MEM_198 should have been replaced
/space/rguenther/src/svn/trunk/gcc/testsuite/gcc.dg/pr70725.c:13:1: internal
compiler error: cannot update SSA form
Fixed by
Index: tree-if-conv.c
===================================================================
--- tree-if-conv.c (revision 235305)
+++ tree-if-conv.c (working copy)
@@ -1911,20 +1911,31 @@ predicate_all_scalar_phis (struct loop *
if (bb == loop->header)
continue;
- if (EDGE_COUNT (bb->preds) == 1)
- continue;
-
phi_gsi = gsi_start_phis (bb);
if (gsi_end_p (phi_gsi))
continue;
- gsi = gsi_after_labels (bb);
- while (!gsi_end_p (phi_gsi))
+ if (EDGE_COUNT (bb->preds) == 1)
{
- phi = phi_gsi.phi ();
- predicate_scalar_phi (phi, &gsi);
- release_phi_node (phi);
- gsi_next (&phi_gsi);
+ /* Propagate degenerate PHIs. */
+ for (phi_gsi = gsi_start_phis (bb); !gsi_end_p (phi_gsi);
+ gsi_next (&phi_gsi))
+ {
+ gphi *phi = phi_gsi.phi ();
+ replace_uses_by (gimple_phi_result (phi),
+ gimple_phi_arg_def (phi, 0));
+ }
+ }
+ else
+ {
+ gsi = gsi_after_labels (bb);
+ while (!gsi_end_p (phi_gsi))
+ {
+ phi = phi_gsi.phi ();
+ predicate_scalar_phi (phi, &gsi);
+ release_phi_node (phi);
+ gsi_next (&phi_gsi);
+ }
}
set_phi_nodes (bb, NULL);
>From gcc-bugs-return-522874-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 09:21:04 2016
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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/70729] Loop marked with omp simd pragma is not vectorized
Date: Thu, 21 Apr 2016 09:21:00 -0000
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--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #9)
> Oh, and I believe to make nests with only outer safelen > 0 work correctly we
> need to move the check elsewhere:
>
> Index: gcc/tree-ssa-loop-im.c
> ===================================================================
> --- gcc/tree-ssa-loop-im.c (revision 235237)
> +++ gcc/tree-ssa-loop-im.c (working copy)
> @@ -2120,6 +2120,12 @@ ref_indep_loop_p_1 (struct loop *loop, i
> bitmap_iterator bi;
> im_mem_ref *aref;
>
> + /* If the Ith and the I + nth iterations can be evaluated
> + concurrently a reference with an invariant address is
> + not dependent on any other memory reference. */
> + if (loop->safelen > 0)
> + return true;
> +
> if (stored_p)
> refs_to_check = &memory_accesses.refs_in_loop[loop->num];
> else
It doesn't work:
Running target unix
FAIL: c-c++-common/cilk-plus/CK/nested_cilk_for.c -O1 execution test
FAIL: c-c++-common/cilk-plus/CK/nested_cilk_for.c -O3 execution test
FAIL: c-c++-common/cilk-plus/CK/nested_cilk_for.c -g -O2 execution test
FAIL: g++.dg/cilk-plus/CK/for1.cc -O1 -fcilkplus execution test
FAIL: g++.dg/cilk-plus/CK/for1.cc -g -O2 -fcilkplus execution test
Running target unix
FAIL: c-c++-common/cilk-plus/CK/nested_cilk_for.c -O1 execution test
FAIL: c-c++-common/cilk-plus/CK/nested_cilk_for.c -O2 -ftree-vectorize
executi
on test
FAIL: c-c++-common/cilk-plus/CK/nested_cilk_for.c -O2 -std=c99 execution test
FAIL: c-c++-common/cilk-plus/CK/nested_cilk_for.c -O3 -flto -g execution test
FAIL: c-c++-common/cilk-plus/CK/nested_cilk_for.c -O3 -g execution test
...
FAIL: gcc.dg/vect/pr59984.c -flto -ffat-lto-objects execution test
FAIL: gcc.dg/vect/pr59984.c execution test
FAIL: gcc.dg/vect/vect-simd-clone-5.c -flto -ffat-lto-objects execution test
FAIL: gcc.dg/vect/vect-simd-clone-5.c execution test
FAIL: gcc.dg/vect/vect-simd-clone-8.c -flto -ffat-lto-objects execution test
FAIL: gcc.dg/vect/vect-simd-clone-8.c execution test
Running target unix
FAIL: libgomp.c/ordered-5.c execution test
FAIL: libgomp.c++/pr66702-2.C execution test
FAIL: libgomp.fortran/examples-4/declare_target-5.f90 -O3
-fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions
execution test
FAIL: libgomp.fortran/examples-4/simd-2.f90 -O1 execution test
FAIL: libgomp.fortran/examples-4/simd-2.f90 -O2 execution test
FAIL: libgomp.fortran/examples-4/simd-2.f90 -O3 -fomit-frame-pointer
-funroll-loops -fpeel-loops -ftracer -finline-functions execution test
FAIL: libgomp.fortran/examples-4/simd-2.f90 -O3 -g execution test
FAIL: libgomp.fortran/examples-4/simd-7.f90 -O3 -fomit-frame-pointer
-funroll-loops -fpeel-loops -ftracer -finline-functions execution test
FAIL: libgomp.fortran/examples-4/simd-7.f90 -O3 -g execution test
>From gcc-bugs-return-522875-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 09:22:49 2016
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Subject: [Bug tree-optimization/70725] Internal compiler error (ICE) on valid code
Date: Thu, 21 Apr 2016 09:22:00 -0000
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--- Comment #12 from Richard Biener <rguenth at gcc dot gnu.org> ---
Testing that.
>From gcc-bugs-return-522876-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 09:34:08 2016
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Subject: [Bug middle-end/70747] [6/7 Regression] ICE on valid code on x86_64-linux-gnu: verify_gimple failed
Date: Thu, 21 Apr 2016 09:34:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2016-04-21
Component|c |middle-end
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Target Milestone|--- |6.0
Summary|ICE on valid code on |[6/7 Regression] ICE on
|x86_64-linux-gnu: |valid code on
|verify_gimple failed |x86_64-linux-gnu:
| |verify_gimple failed
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
The GENERIC looks like
;; Function fn1 (null)
;; enabled by -tree-original
{
a = (int *) __builtin_malloc (8);
b = 0, 0;
}
which is already odd. fold produces this via
if (TREE_CODE_CLASS (code) == tcc_binary
|| TREE_CODE_CLASS (code) == tcc_comparison)
{
...
if (TREE_CODE (arg1) == COMPOUND_EXPR
&& reorder_operands_p (arg0, TREE_OPERAND (arg1, 0)))
{
tem = fold_build2_loc (loc, code, type, op0,
fold_convert_loc (loc, TREE_TYPE (op1),
TREE_OPERAND (arg1, 1)));
return build2_loc (loc, COMPOUND_EXPR, type, TREE_OPERAND (arg1, 0),
tem);
}
and the issue is that type is int while the comparison folding producing tem
returns a bool via fold_comparison:
8684 switch (code)
8685 {
8686 case EQ_EXPR:
8687 case LE_EXPR:
8688 case LT_EXPR:
8689 return boolean_false_node;
>From gcc-bugs-return-522877-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 09:38:07 2016
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/60796] Default move constructor not generated by explicit template instantiation
Date: Thu, 21 Apr 2016 09:38:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-21
Ever confirmed|0 |1
Known to fail| |5.3.0, 6.0, 7.0
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Clang and G++ behave the same, they don't emit the defaulted members in either
translation unit. EDG emits them in main.o where they are needed (but not in
A.o)
template <typename T>
struct shared_ptr {
shared_ptr(T*) { }
shared_ptr(const shared_ptr&) { }
shared_ptr(shared_ptr&&) { }
~shared_ptr() { }
};
template <typename T>
struct A
{
A (T* a) : a(a) {}
A() = default;
A(A&&) = default;
A& operator =(const A&) = default;
shared_ptr<T> a;
};
extern template struct A<int>;
int main()
{
A<int> a = new int(19);
A<int> b = static_cast<A<int>&&>(a);
}
g++ -c main.C
nm -C main.o
U _Unwind_Resume
0000000000000000 W shared_ptr<int>::~shared_ptr()
0000000000000000 W shared_ptr<int>::~shared_ptr()
0000000000000000 n shared_ptr<int>::~shared_ptr()
U A<int>::A(A<int>&&)
U A<int>::A(int*)
0000000000000000 W A<int>::~A()
0000000000000000 W A<int>::~A()
0000000000000000 n A<int>::~A()
U operator new(unsigned long)
U __gxx_personality_v0
0000000000000000 T main
clang++ -std=c++11 -c main.C
nm -C main.o
0000000000000000 r GCC_except_table0
U _Unwind_Resume
0000000000000000 W shared_ptr<int>::~shared_ptr()
U A<int>::A(A<int>&&)
U A<int>::A(int*)
0000000000000000 W A<int>::~A()
U operator new(unsigned long)
U __gxx_personality_v0
0000000000000000 T main
edg --c++11 main.C
nm -C main.o
000000000000015c W shared_ptr<int>::~shared_ptr()
00000000000001a0 W shared_ptr<int>::~shared_ptr()
00000000000002a8 T A<int>::A(A<int>&&)
00000000000001e4 T A<int>::A(int*)
0000000000000344 T A<int>::A(A<int>&&)
0000000000000280 T A<int>::A(int*)
000000000000036c W A<int>::~A()
0000000000000474 W A<int>::~A()
U operator delete(void*)
U operator new(unsigned long)
0000000000000004 C __EDGCPFE__4_9
0000000000000050 d __T12929048.1926
0000000000000040 d __T12932616.1915
0000000000000060 d __T12934328.1936
0000000000000000 d __T12936536.1896
U __curr_eh_stack_entry
U __eh_curr_region
0000000000000000 T main
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Subject: [Bug c++/70744] preincrements possibly double-evaluated in GNU ternaries
Date: Thu, 21 Apr 2016 09:42:00 -0000
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What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-21
Ever confirmed|0 |1
Known to fail| |4.3.5, 7.0
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
;; Function int main() (null)
;; enabled by -tree-original
{
int x = 1;
<<cleanup_point int x = 1;>>;
<<cleanup_point <<< Unknown tree: expr_stmt
if ( ++x != 0)
{
(void) ++x;
}
else
{
<<< Unknown tree: void_cst >>>
} >>>>>;
return <retval> = x;
}
>From gcc-bugs-return-522879-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 09:47:19 2016
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Subject: [Bug c/70742] Support div as a builtin
Date: Thu, 21 Apr 2016 09:47:00 -0000
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--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
The compiler would need to provide div_t as a builtin-type. Or the standard
specifies it enough so that layout issues are no worry.
>From gcc-bugs-return-522880-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 09:51:17 2016
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Subject: [Bug tree-optimization/70740] [7 Regression] ICE when compiling the Linux kernel (net/wireless/util.o)
Date: Thu, 21 Apr 2016 09:51:00 -0000
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What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Target Milestone|--- |7.0
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mine.
>From gcc-bugs-return-522881-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 09:58:00 2016
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Subject: =?UTF-8?B?W0J1ZyBjLzcwNzQ5XSBOZXc6IFs0LjkvNSBSZWdyZXNzaW9uXSBlcnJvcjog?= =?UTF-8?B?c3RvcmFnZSBzaXplIG9mIOKAmGHigJkgaXNu4oCZdCBrbm93biBnb2VzIGF3?= =?UTF-8?B?YXkgd2l0aCAtT3M=?Date: Thu, 21 Apr 2016 09:58:00 -0000
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Bug ID: 70749
Summary: [4.9/5 Regression] error: storage size of ‘a’ isn’t
known goes away with -Os
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I'm hitting an error when trying to build an allyesconfig arm64 linux kernel
(4.5.2) (with an aarch64-none-linux-gnu toolchain).
drivers/staging/wilc1000/wilc_spi.c:123:34: error: storage size of
‘wilc1000_spi_ops’ isn’t known
static const struct wilc1000_ops wilc1000_spi_ops;
^~~~~~~~~~~~~~~~
I don't get this error when compiling with the GCC 5 branch.
creduce reduces this to just:
static struct wilc1000_ops a;
The weird behaviour is on the GCC 5 branch in that I get the error:
bug.i:1:28: error: storage size of ‘a’ isn’t known
static struct wilc1000_ops a;
^
when compiling with -std=gnu89 bug.i -S
but it is compiled without an error (into an empty file) if I add -Os:
-std=gnu89 bug.i -S -Os
This behaviour occurs on GCC 5 and 4.9 and 4.8.
GCC 6 and trunk give the error regardless of optimization level.
>From gcc-bugs-return-522882-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 10:07:45 2016
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Subject: [Bug c/70742] Support div as a builtin
Date: Thu, 21 Apr 2016 10:07:00 -0000
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--- Comment #8 from Marc Glisse <glisse at gcc dot gnu.org> ---
"The div, ldiv, and lldiv functions return a structure of type div_t, ldiv_t,
and lldiv_t, respectively, comprising both the quotient and the remainder. The
structures shall contain (in either order) the members quot (the quotient) and
rem (the remainder), each of which has the same type as the arguments numer and
denom."
So while we know the names and types of the fields, we don't know their order
(unless stdlib.h was included).
>From gcc-bugs-return-522883-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 10:09:53 2016
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[4.9/5 Regression] error: |error: storage size of ‘a’
|storage size of ‘a’ isn’t |isn’t known goes away with
|known goes away with -Os |-Os
Known to fail| |4.3.5
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
What version works for you? Even 4.3 doesn't error at -O. I suspect older
compiler eliminate a before diagnosing it.
>From gcc-bugs-return-522884-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 10:13:08 2016
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--- Comment #2 from ktkachov at gcc dot gnu.org ---
Trunk errors with or without optimisation.
GCC 5 and earlier don't error with optimisation.
If this behaviour is expected (and the bug is in the kernel sources) feel free
to close the report. I just thought it curious that the error depends on
optimisation level.
>From gcc-bugs-return-522885-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 10:17:26 2016
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Subject: [Bug c++/60796] Default move constructor not generated by explicit template instantiation
Date: Thu, 21 Apr 2016 10:17:00 -0000
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--- Comment #4 from Daniel Vollmer <zerolo at gmail dot com> ---
The relevant clang issue seems to be
https://llvm.org/bugs/show_bug.cgi?id=22763
In my case, I have the "extern template" declaration in the header for the
corresponding template, thus preventing any implicit instantiations and then
leading to the linker errors with the missing "= default;" methods because the
explicit instantiation doesn't generate them.
>From gcc-bugs-return-522886-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 10:22:03 2016
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Subject: [Bug fortran/70748] [6/7 Regression] ICE with debug in gfc_trans_block_construct
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70748
Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-21
CC| |tkoenig at gcc dot gnu.org
Summary|GCC6 Regression: ICE with |[6/7 Regression] ICE with
|debug in |debug in
|gfc_trans_block_construct |gfc_trans_block_construct
Ever confirmed|0 |1
Known to fail| |6.0, 7.0
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
This is caused by revision r233797, see also pr70040.
>From gcc-bugs-return-522887-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 10:54:41 2016
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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/70750] New: [6/7 Regression] Load and call no longer combined for indirect calls on x86
Date: Thu, 21 Apr 2016 10:54:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70750
Bug ID: 70750
Summary: [6/7 Regression] Load and call no longer combined for
indirect calls on x86
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: amonakov at gcc dot gnu.org
Target Milestone: ---
Target: x86_64-*-*, i?86-*-*
int f(int (**p)(void))
{
return -p[1]();
}
gcc-6 -O2 produces:
f:
subq $8, %rsp
movq 8(%rdi), %rax
call *%rax
addq $8, %rsp
negl %eax
ret
gcc-5.1 -O2 could combine movq+call into one memory-indirect call:
f:
subq $8, %rsp
call *8(%rdi)
addq $8, %rsp
negl %eax
ret
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Subject: [Bug target/70750] [6/7 Regression] Load and call no longer combined for indirect calls on x86
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|rtl-optimization |target
Target Milestone|--- |6.0
>From gcc-bugs-return-522889-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 11:06:32 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70750] [6/7 Regression] Load and call no longer combined for indirect calls on x86
Date: Thu, 21 Apr 2016 11:06:00 -0000
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David Abdurachmanov <david.abdurachmanov at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |david.abdurachmanov at gmail dot c
| |om
--- Comment #1 from David Abdurachmanov <david.abdurachmanov at gmail dot com> ---
I have noticed this while comparing assembly generated by GCC 5.3.0 and GCC
6.0.1.
Examples (diff -u 5.3.0 6.0.1)
7 - ff 50 18 callq *0x18(%rax)
8 + 48 8b 40 18 mov 0x18(%rax),%rax
9 + ff d0 callq *%rax
41 - ff 50 08 callq *0x8(%rax)
42 - 4c 8b 7b f8 mov -0x8(%rbx),%r15
43 + 48 8b 40 08 mov 0x8(%rax),%rax
44 + ff d0 callq *%rax
45 + 49 8b 5f f8 mov -0x8(%r15),%rbx
49 - ff 50 08 callq *0x8(%rax)
50 + 48 8b 40 08 mov 0x8(%rax),%rax
51 + ff d0 callq *%rax
Seems that GCC 6.0.1 is no more combining mov + callq. I have not checked if it
was intentional change or not in GCC.
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug ipa/70646] [4.9/5/6/7 Regression] Corrupt truncated function
Date: Thu, 21 Apr 2016 11:07:00 -0000
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--- Comment #30 from rguenther at suse dot de <rguenther at suse dot de> ---
On Wed, 20 Apr 2016, jamborm at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70646
>
> --- Comment #29 from Martin Jambor <jamborm at gcc dot gnu.org> ---
> Created attachment 38316
> --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38316&action=edit
> Fix storing access size to conditions
>
> Honza asked me to also come up with a version of the patch where we
> store access size to the condition (as a HOST_WIDE_INT) and use that
> for access size comparisons, so that we avoid any potential confusion
> (for example if the loaded value is run through a NOP_EXPR after
> loading but before the described use).
>
> So this is it. It survives both regular and LTO bootstrap and testing
> on an x86_64-linux.
Any reason it's not unsigned HOST_WIDE_INT size?
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Subject: [Bug ipa/70646] [4.9/5/6/7 Regression] Corrupt truncated function
Date: Thu, 21 Apr 2016 11:26:00 -0000
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--- Comment #31 from Martin Jambor <jamborm at gcc dot gnu.org> ---
(In reply to rguenther@suse.de from comment #30)
>
> Any reason it's not unsigned HOST_WIDE_INT size?
The only reason is to use the same type in which
get_ref_base_and_extent returns size.
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Subject: [Bug tree-optimization/70715] SCEV failed to prove no-overflow-ness information unsigned loop IV
Date: Thu, 21 Apr 2016 11:29:00 -0000
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--- Comment #1 from amker at gcc dot gnu.org ---
Author: amker
Date: Thu Apr 21 11:28:58 2016
New Revision: 235333
URL: https://gcc.gnu.org/viewcvs?rev=235333&root=gcc&view=rev
Log:
PR tree-optimization/70715
* tree-ssa-loop-niter.c (loop_exits_before_overflow): Check equality
after expanding BASE using expand_simple_operations.
gcc/testsuite/ChangeLog
PR tree-optimization/70715
* gcc.dg/tree-ssa/scev-13.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/tree-ssa/scev-13.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-loop-niter.c
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From: "jiwang at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/70751] New: FAIL: gcc.target/arm/eliminate.c scan-assembler-times r0,[\\t ]*sp 3 since r235184
Date: Thu, 21 Apr 2016 11:30:00 -0000
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Bug ID: 70751
Summary: FAIL: gcc.target/arm/eliminate.c scan-assembler-times
r0,[\\t ]*sp 3 since r235184
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: jiwang at gcc dot gnu.org
CC: vmakarov at redhat dot com
Target Milestone: ---
Target: arm*
r235184 caused the following regression on trunk
FAIL: gcc: gcc.target/arm/eliminate.c scan-assembler-times r0,[\\t ]*sp 3
configuration: --target=arm-none-eabi --enable-languages=c
compile option: -O2 -march=armv7-a
before:
===
foo:
str lr, [sp, #-4]!
sub sp, sp, #12
add r0, sp, #4
bl bar
add r0, sp, #4
bl bar
add r0, sp, #4
bl bar
add sp, sp, #12
ldr pc, [sp], #4
after:
===
foo:
str lr, [sp, #-4]!
sub sp, sp, #20
add r3, sp, #12
str r3, [sp, #4]
mov r0, r3
bl bar
add r3, sp, #12
str r3, [sp, #4]
mov r0, r3
bl bar
add r3, sp, #12
str r3, [sp, #4]
mov r0, r3
bl bar
add sp, sp, #20
ldr pc, [sp], #4
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Subject: [Bug tree-optimization/70715] SCEV failed to prove no-overflow-ness information unsigned loop IV
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amker at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #2 from amker at gcc dot gnu.org ---
Fixed.
>From gcc-bugs-return-522895-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 11:32:03 2016
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Subject: [Bug rtl-optimization/70751] [7 Regression] FAIL: gcc.target/arm/eliminate.c scan-assembler-times r0,[\\t ]*sp 3 since r235184
Date: Thu, 21 Apr 2016 11:32:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization, ra
Target Milestone|--- |7.0
Summary|FAIL: |[7 Regression] FAIL:
|gcc.target/arm/eliminate.c |gcc.target/arm/eliminate.c
|scan-assembler-times |scan-assembler-times
|r0,[\\t ]*sp 3 since |r0,[\\t ]*sp 3 since
|r235184 |r235184
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From: "krebbel at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70674] [4.9/5/6/7 regression] S/390: Memory access below stack pointer in epilogue
Date: Thu, 21 Apr 2016 11:51:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70674
--- Comment #5 from Andreas Krebbel <krebbel at gcc dot gnu.org> ---
Author: krebbel
Date: Thu Apr 21 11:50:22 2016
New Revision: 235334
URL: https://gcc.gnu.org/viewcvs?rev=235334&root=gcc&view=rev
Log:
PR70674: S/390: Add memory barrier to stack pointer restore
from fpr.
This patches fixes a problem with stack variable accesses being
scheduled after the stack pointer restore instructions. In the
testcase this happened with the stack variable 'a' accessed through the
frame pointer.
The existing stack_tie we have in the backend is basically useless
when trying to block stack variable accesses from being scheduled
across an insn. The alias set of stack variables and the frame alias
set usually differ and hence aren't in conflict with each other. The
solution appears to be a magic MEM term with a scratch register which
is handled as a full memory barrier when analyzing scheduling
dependencies.
With the patch a (clobber (mem:BLK (scratch))) is being added to the
restore instruction in order to prevent any memory operations to be
scheduled across the insn. The patch does that only for the one case
where the stack pointer is restored from an FPR. Theoretically this
might happen also in the case where the stack pointer gets restored
using a load multiple. However, triggering that problem with
load-multiple appears to be much harder since the load-multiple will
restore the frame pointer as well. So in order to see the problem a
different call-clobbered register would need to be used as temporary
stack pointer.
Another case which needs to be handled some day is the stack pointer
allocation part. It needs to be a memory barrier as well.
gcc/ChangeLog:
2016-04-21 Andreas Krebbel <krebbel@linux.vnet.ibm.com>
Backport from mainline
2016-04-20 Andreas Krebbel <krebbel@linux.vnet.ibm.com>
PR target/70674
* config/s390/s390.c (s390_restore_gprs_from_fprs): Pick the new
stack_restore_from_fpr pattern when restoring r15.
(s390_optimize_prologue): Strip away the memory barrier in the
parallel when trying to get rid of restore insns.
* config/s390/s390.md ("stack_restore_from_fpr"): New insn
definition for loading the stack pointer from an FPR. Compared to
the normal move insn this pattern includes a full memory barrier.
gcc/testsuite/ChangeLog:
2016-04-21 Andreas Krebbel <krebbel@linux.vnet.ibm.com>
Backport from mainline
2016-04-20 Andreas Krebbel <krebbel@linux.vnet.ibm.com>
PR target/70674
* gcc.target/s390/pr70674.c: New test.
Added:
branches/gcc-4_9-branch/gcc/testsuite/gcc.target/s390/pr70674.c
Modified:
branches/gcc-4_9-branch/gcc/ChangeLog
branches/gcc-4_9-branch/gcc/config/s390/s390.c
branches/gcc-4_9-branch/gcc/config/s390/s390.md
branches/gcc-4_9-branch/gcc/testsuite/ChangeLog
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Subject: [Bug target/70674] [4.9/5/6/7 regression] S/390: Memory access below stack pointer in epilogue
Date: Thu, 21 Apr 2016 11:52:00 -0000
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Andreas Krebbel <krebbel at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #6 from Andreas Krebbel <krebbel at gcc dot gnu.org> ---
Fixed with the committed patch.
>From gcc-bugs-return-522898-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 11:53:36 2016
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Subject: [Bug middle-end/70747] [6/7 Regression] ICE on valid code on x86_64-linux-gnu: verify_gimple failed
Date: Thu, 21 Apr 2016 11:53:00 -0000
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Apr 21 11:52:50 2016
New Revision: 235335
URL: https://gcc.gnu.org/viewcvs?rev=235335&root=gcc&view=rev
Log:
2016-04-21 Richard Biener <rguenther@suse.de>
PR middle-end/70747
* fold-const.c (fold_comparison): Return properly typed
constant boolean.
* gcc.dg/pr70747.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/pr70747.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/fold-const.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug middle-end/70747] [6/7 Regression] ICE on valid code on x86_64-linux-gnu: verify_gimple failed
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-522900-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 11:58:12 2016
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Subject: [Bug middle-end/70747] [6/7 Regression] ICE on valid code on x86_64-linux-gnu: verify_gimple failed
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Apr 21 11:57:28 2016
New Revision: 235336
URL: https://gcc.gnu.org/viewcvs?rev=235336&root=gcc&view=rev
Log:
2016-04-21 Richard Biener <rguenther@suse.de>
PR middle-end/70747
* fold-const.c (fold_comparison): Return properly typed
constant boolean.
* gcc.dg/pr70747.c: New testcase.
Added:
branches/gcc-6-branch/gcc/testsuite/gcc.dg/pr70747.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/fold-const.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
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Subject: [Bug bootstrap/70704] [6 Regression] AIX bootstrap comparison failure
Date: Thu, 21 Apr 2016 12:02:00 -0000
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--- Comment #30 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 38320
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38320&action=edit
2.5.37 -> 2.6
So, can you please verify that the RC1 tarball bootstraps if you apply the
attached patch (which should change the file as if I've created rc1 with flex
2.6 instead of 2.5.37)?
Or do the #line filenames matter instead?
I normally bootstrap with ../configure and therefore the paths are like
../../gcc/something, but in the RC tarballs it is
/d/gcc-6.0.1-RC-20160415/gcc-6.0.1-RC-20160415/gcc/something
(the /d is my dest dir symlink to make those as short as possible, the rest
comes from gcc_release script).
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Subject: [Bug fortran/70752] New: Incorrect LEN for ALLOCATABLE CHARACTER
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Bug ID: 70752
Summary: Incorrect LEN for ALLOCATABLE CHARACTER
Product: gcc
Version: 5.3.1
Status: UNCONFIRMED
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Priority: P3
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$ gfortran --version
GNU Fortran (GCC) 5.3.1 20160406 (Red Hat 5.3.1-6)
$ cat test.f95
PROGRAM TEST
IMPLICIT NONE
INTEGER, PARAMETER :: I = 3
TYPE T
CHARACTER(LEN=:), ALLOCATABLE :: C(:)
END TYPE T
TYPE(T), TARGET :: S
CHARACTER (LEN=I), POINTER :: P(:)
ALLOCATE ( CHARACTER(LEN=I) :: S%C(5) )
PRINT *, 'SIZE(S%C) = ',SIZE(S%C)
PRINT *, 'LEN(S%C) = ',LEN(S%C)
P => S%C
END PROGRAM TEST
$ gfortran -Wall -fbounds-check test.f95 -o test
$ ./test
SIZE(S%C) = 5
LEN(S%C) = 0
At line 14 of file test.f95
Fortran runtime error: Unequal character lengths (3/0) in pointer assignment
? Why does the LEN function return zero?
The SIZE function is correct.
LEN(S%C(1)) gives the correct result, but LEN should work with an array
argument too.
? Why does the pointer assignment fail?
It is OK without -fbounds-check.
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Subject: [Bug target/70728] GCC trunk emits invalid assembly for knl target
Date: Thu, 21 Apr 2016 12:09:00 -0000
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--- Comment #2 from Kirill Yukhin <kyukhin at gcc dot gnu.org> ---
This is a 5/6 regression
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Subject: [Bug sanitizer/70624] [6/7 Regression] Several hundred asan failures with 6.0 on x86_64-apple-darwin10.8
Date: Thu, 21 Apr 2016 12:13:00 -0000
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--- Comment #10 from chefmax at gcc dot gnu.org ---
Author: chefmax
Date: Thu Apr 21 12:12:53 2016
New Revision: 235337
URL: https://gcc.gnu.org/viewcvs?rev=235337&root=gcc&view=rev
Log:
Cherry-pick r266868 from upstream.
PR sanitizer/70624
* asan/asan_mac.cc: Cherry pick upstream r266868.
Modified:
branches/gcc-6-branch/libsanitizer/ChangeLog
branches/gcc-6-branch/libsanitizer/asan/asan_mac.cc
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Subject: [Bug sanitizer/70624] [6/7 Regression] Several hundred asan failures with 6.0 on x86_64-apple-darwin10.8
Date: Thu, 21 Apr 2016 12:20:00 -0000
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--- Comment #11 from chefmax at gcc dot gnu.org ---
Author: chefmax
Date: Thu Apr 21 12:19:54 2016
New Revision: 235338
URL: https://gcc.gnu.org/viewcvs?rev=235338&root=gcc&view=rev
Log:
Cherry-pick r266868 from upstream.
PR sanitizer/70624
* asan/asan_mac.cc: Cherry pick upstream r266868.
Modified:
trunk/libsanitizer/ChangeLog
trunk/libsanitizer/asan/asan_mac.cc
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Subject: [Bug bootstrap/70704] [6 Regression] AIX bootstrap comparison failure
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--- Comment #31 from David Edelsohn <dje at gcc dot gnu.org> ---
I will test, but Flex and gengtype-lex.c does not appear to be the issue. If
the change works, it will be coincidental.
I have built the RC with gengtype-lex.c removed so that it is regenerated with
the system Flex -- it still fails.
I have build gcc-6-branch r235040 with gengtype-lex.c from the RC -- it works.
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Subject: [Bug bootstrap/70704] [6 Regression] AIX bootstrap comparison failure
Date: Thu, 21 Apr 2016 13:14:00 -0000
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--- Comment #32 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
But if gengtype-lex.c is not it, what it is then? I can't see how the
generated man pages or *.html files or *.gmo or *.info files could affect it,
so is the pathname? If you check out r235040 into the same directory as you
tested the tarball in, does that work? Or is it the LAST_UPDATED file missing
in the rc tarball?
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Subject: [Bug bootstrap/70704] [6 Regression] AIX bootstrap comparison failure
Date: Thu, 21 Apr 2016 13:18:00 -0000
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--- Comment #33 from David Edelsohn <dje at gcc dot gnu.org> ---
I'm completely confused as well. The bits seem to be identical. The only
other obvious difference is ordering of timestamps of the source files that
would cause Make to build files in a different order.
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Subject: [Bug bootstrap/70704] [6 Regression] AIX bootstrap comparison failure
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--- Comment #34 from David Edelsohn <dje at gcc dot gnu.org> ---
The tarball contains LAST_UPDATED, although different contents.
I previously copied gcc/REVISION from svn checkout to the RC (which is
referenced by Makefile). That showed no difference.
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Subject: [Bug fortran/70752] Incorrect LEN for ALLOCATABLE CHARACTER
Date: Thu, 21 Apr 2016 13:35:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-21
Blocks| |68241
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed from 4.9 up to trunk (7.0). Note LEN(S%C(1)) returns 3, so apparently
the elements of S%C have their length set, but not S%C itself.
> Why does the pointer assignment fail
The length of S%C is zero and not 3 as expected by the assignment. The fact
that the code executes without bounds check does not mean that the executable
is correct.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68241
[Bug 68241] [meta-bug] Deferred-length character
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Subject: [Bug tree-optimization/70725] Internal compiler error (ICE) on valid code
Date: Thu, 21 Apr 2016 14:10:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70725
--- Comment #13 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Apr 21 14:09:33 2016
New Revision: 235341
URL: https://gcc.gnu.org/viewcvs?rev=235341&root=gcc&view=rev
Log:
2016-04-21 Richard Biener <rguenther@suse.de>
PR tree-optimization/70725
* tree-if-conv.c (if_convertible_phi_p): Adjust guard
for phi_convertible_by_degenerating_args.
(predicate_all_scalar_phis): Handle single-argument PHIs.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree-if-conv.c
>From gcc-bugs-return-522912-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 14:16:12 2016
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Subject: [Bug bootstrap/70704] [6 Regression] AIX bootstrap comparison failure
Date: Thu, 21 Apr 2016 14:16:00 -0000
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--- Comment #35 from David Edelsohn <dje at gcc dot gnu.org> ---
Flex 2.6.0 works with --enable-checking=yes, but may not work with
--enable-checking=release. I believe that Flex may be the culprit. If the
current bootstrap confirms that, I am going to bootstrap with gengtype-lex.c
compiled with -fsigned-char.
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Subject: [Bug c/70753] New: missing diagnostic in C11 mode: sizeof, _Alignof of function type
Date: Thu, 21 Apr 2016 14:22:00 -0000
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Bug ID: 70753
Summary: missing diagnostic in C11 mode: sizeof, _Alignof of
function type
Product: gcc
Version: 6.0
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Keywords: accepts-invalid
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GCC accepts this code, but sizeof of a function type is invalid in C11 (and
likely earlier). It is a documented extension for GNU mode, but it is also
accepted with -std=c11.
#include <stdio.h>
int
f (int a, int b)
{
return a + b;
}
int
main (void)
{
printf ("%zu\n", sizeof (*f));
printf ("%zu\n", _Alignof (*f));
return 0;
}
The pedantic warning should be an error in C11 mode.
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Subject: [Bug tree-optimization/69489] missed vectorization for boolean loop, missed if-conversion
Date: Thu, 21 Apr 2016 14:26:00 -0000
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--- Comment #7 from Andreas Schwab <schwab@linux-m68k.org> ---
The second commit triggers this ICE on ia64:
$ gcc/xgcc -Bgcc/ ../../gcc/gcc/testsuite/gcc.dg/pr70725.c -O3 -S
../../gcc/gcc/testsuite/gcc.dg/pr70725.c: In function ‘fn1’:
../../gcc/gcc/testsuite/gcc.dg/pr70725.c:13:1: internal compiler error: in
phi_convertible_by_degenerating_args, at tree-if-conv.c:605
fn1 ()
^~~
0x4000000001c26b3f phi_convertible_by_degenerating_args
../../gcc/tree-if-conv.c:605
0x4000000001c2727f if_convertible_phi_p
../../gcc/tree-if-conv.c:662
0x4000000001c3675f if_convertible_loop_p_1
../../gcc/tree-if-conv.c:1408
0x4000000001c3700f if_convertible_loop_p
../../gcc/tree-if-conv.c:1466
0x4000000001c374cf tree_if_conversion
../../gcc/tree-if-conv.c:2774
0x4000000001c37d9f execute
../../gcc/tree-if-conv.c:2875
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Subject: [Bug c/70753] missing diagnostic in C11 mode: sizeof, _Alignof of function type
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mpolacek at gcc dot gnu.org
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Why would it have to be error? If you want errors instead of warnings, use
-pedantic-errors.
>From gcc-bugs-return-522916-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 14:30:18 2016
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Subject: [Bug tree-optimization/69489] missed vectorization for boolean loop, missed if-conversion
Date: Thu, 21 Apr 2016 14:30:00 -0000
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--- Comment #8 from Andreas Schwab <schwab@linux-m68k.org> ---
The same ICE also occurs on m68k and aarch64.
>From gcc-bugs-return-522917-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 14:31:44 2016
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/69489] missed vectorization for boolean loop, missed if-conversion
Date: Thu, 21 Apr 2016 14:31:00 -0000
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--- Comment #9 from rguenther at suse dot de <rguenther at suse dot de> ---
On Thu, 21 Apr 2016, schwab@linux-m68k.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69489
>
> --- Comment #7 from Andreas Schwab <schwab@linux-m68k.org> ---
> The second commit triggers this ICE on ia64:
>
> $ gcc/xgcc -Bgcc/ ../../gcc/gcc/testsuite/gcc.dg/pr70725.c -O3 -S
> ../../gcc/gcc/testsuite/gcc.dg/pr70725.c: In function ‘fn1’:
> ../../gcc/gcc/testsuite/gcc.dg/pr70725.c:13:1: internal compiler error: in
> phi_convertible_by_degenerating_args, at tree-if-conv.c:605
> fn1 ()
> ^~~
> 0x4000000001c26b3f phi_convertible_by_degenerating_args
> ../../gcc/tree-if-conv.c:605
> 0x4000000001c2727f if_convertible_phi_p
> ../../gcc/tree-if-conv.c:662
> 0x4000000001c3675f if_convertible_loop_p_1
> ../../gcc/tree-if-conv.c:1408
> 0x4000000001c3700f if_convertible_loop_p
> ../../gcc/tree-if-conv.c:1466
> 0x4000000001c374cf tree_if_conversion
> ../../gcc/tree-if-conv.c:2774
> 0x4000000001c37d9f execute
> ../../gcc/tree-if-conv.c:2875
Isn't that what was reported in PR70725 for its fix? Does r235341 fix it?
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Subject: [Bug c/70753] missing diagnostic in C11 mode: sizeof, _Alignof of function type
Date: Thu, 21 Apr 2016 14:32:00 -0000
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--- Comment #2 from Florian Weimer <fw at gcc dot gnu.org> ---
(In reply to Marek Polacek from comment #1)
> Why would it have to be error? If you want errors instead of warnings, use
> -pedantic-errors.
I did not know about -pedantic-errors. It is extremely surprising that
-std=c11 does not enable all diagnostics required by C11.
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Subject: [Bug c/70753] missing diagnostic in C11 mode: sizeof, _Alignof of function type
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--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
But you get the warning with -Wpedantic, right?
>From gcc-bugs-return-522920-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 14:40:53 2016
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From: "amker at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/69489] missed vectorization for boolean loop, missed if-conversion
Date: Thu, 21 Apr 2016 14:40:00 -0000
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--- Comment #10 from amker at gcc dot gnu.org ---
(In reply to Andreas Schwab from comment #7)
> The second commit triggers this ICE on ia64:
>
> $ gcc/xgcc -Bgcc/ ../../gcc/gcc/testsuite/gcc.dg/pr70725.c -O3 -S
> ../../gcc/gcc/testsuite/gcc.dg/pr70725.c: In function ‘fn1’:
> ../../gcc/gcc/testsuite/gcc.dg/pr70725.c:13:1: internal compiler error: in
> phi_convertible_by_degenerating_args, at tree-if-conv.c:605
> fn1 ()
> ^~~
> 0x4000000001c26b3f phi_convertible_by_degenerating_args
> ../../gcc/tree-if-conv.c:605
> 0x4000000001c2727f if_convertible_phi_p
> ../../gcc/tree-if-conv.c:662
> 0x4000000001c3675f if_convertible_loop_p_1
> ../../gcc/tree-if-conv.c:1408
> 0x4000000001c3700f if_convertible_loop_p
> ../../gcc/tree-if-conv.c:1466
> 0x4000000001c374cf tree_if_conversion
> ../../gcc/tree-if-conv.c:2774
> 0x4000000001c37d9f execute
> ../../gcc/tree-if-conv.c:2875
(In reply to rguenther@suse.de from comment #9)
> On Thu, 21 Apr 2016, schwab@linux-m68k.org wrote:
>
> > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69489
> >
> > --- Comment #7 from Andreas Schwab <schwab@linux-m68k.org> ---
> > The second commit triggers this ICE on ia64:
> >
> > $ gcc/xgcc -Bgcc/ ../../gcc/gcc/testsuite/gcc.dg/pr70725.c -O3 -S
> > ../../gcc/gcc/testsuite/gcc.dg/pr70725.c: In function ‘fn1’:
> > ../../gcc/gcc/testsuite/gcc.dg/pr70725.c:13:1: internal compiler error: in
> > phi_convertible_by_degenerating_args, at tree-if-conv.c:605
> > fn1 ()
> > ^~~
> > 0x4000000001c26b3f phi_convertible_by_degenerating_args
> > ../../gcc/tree-if-conv.c:605
> > 0x4000000001c2727f if_convertible_phi_p
> > ../../gcc/tree-if-conv.c:662
> > 0x4000000001c3675f if_convertible_loop_p_1
> > ../../gcc/tree-if-conv.c:1408
> > 0x4000000001c3700f if_convertible_loop_p
> > ../../gcc/tree-if-conv.c:1466
> > 0x4000000001c374cf tree_if_conversion
> > ../../gcc/tree-if-conv.c:2774
> > 0x4000000001c37d9f execute
> > ../../gcc/tree-if-conv.c:2875
>
> Isn't that what was reported in PR70725 for its fix? Does r235341 fix it?
I will check this. Also I have a following patch handling general cases in
which PHIs can be degenerated and have more than one arguments.
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Subject: [Bug bootstrap/70704] [6 Regression] AIX bootstrap comparison failure
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--- Comment #36 from David Edelsohn <dje at gcc dot gnu.org> ---
It definitely is Flex. gcc-6-branch r235040 and r235340 fail when built with
Flex 2.6.0. gcc-6.0.1-RC-20160415 fails using the supplied gengtype-lex.c
created with Flex 2.5.37.
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Subject: [Bug tree-optimization/69489] missed vectorization for boolean loop, missed if-conversion
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--- Comment #11 from Andreas Schwab <schwab@linux-m68k.org> ---
> Isn't that what was reported in PR70725 for its fix? Does r235341 fix it?
Yes and yes, but r235252 didn't trigger it.
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Subject: [Bug c++/70522] Hidden friend functions block qualified name lookup into nested unnamed namespace
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Casey Carter <Casey at Carter dot net> changed:
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--- Comment #2 from Casey Carter <Casey at Carter dot net> ---
This is a regression of sorts, FWIW, gcc 4.3 compiled it correctly
(http://melpon.org/wandbox/permlink/Efjfvay0U5sZvZP8) back in the day. I assume
that's not quite "regressive" enough for the 6 branch?
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Subject: [Bug c++/70744] preincrements possibly double-evaluated in GNU ternaries
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
That must be missing SAVE_EXPR. I'll have a look.
>From gcc-bugs-return-522925-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 15:30:19 2016
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Subject: [Bug target/70728] GCC trunk emits invalid assembly for knl target
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--- Comment #3 from Kirill Yukhin <kyukhin at gcc dot gnu.org> ---
Author: kyukhin
Date: Thu Apr 21 15:29:29 2016
New Revision: 235344
URL: https://gcc.gnu.org/viewcvs?rev=235344&root=gcc&view=rev
Log:
AVX-512. PR target/70728. Use separate constraint for AVX-512BW
PR target/70728
gcc/
* gcc/config/i386/sse.md (define_insn
"<shift_insn><mode>3<mask_name>"):
Extract AVX-512BW constraint from AVX.
gcc/testsuite/
* gcc.target/i386/pr70728.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr70728.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/sse.md
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug tree-optimization/69489] missed vectorization for boolean loop, missed if-conversion
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--- Comment #12 from Julian Taylor <jtaylor.debian at googlemail dot com> ---
the testcase in this ticket is not yet vectorized with gcc 20160421 (r235341)
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From: "vp at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/70754] New: ICE during predictive commoning
Date: Thu, 21 Apr 2016 15:41:00 -0000
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Bug ID: 70754
Summary: ICE during predictive commoning
Product: gcc
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The following fortran testcase (reduced from a large program) at -Ofast causes
an ICE for aarch64-none-linux-gnu during predictive commoning. This is
reproducible with version 5.3, 6 and trunk.
$ cat y.f90
module m
implicit none
private
save
integer, parameter, public :: &
ii4 = selected_int_kind(6), &
rr8 = selected_real_kind(13)
integer (ii4), dimension(40,40,199), public :: xyz
public :: foo
contains
subroutine foo(a)
real (rr8), dimension(40,40), intent(out) :: a
real (rr8), dimension(40,40) :: b
integer (ii4), dimension(40,40) :: c
integer i, j
do i=1,20
b(i,j) = 123 * a(i,j) + 34 * a(i,j+1) &
+ 34 * a(i,j-1) + a(i+1,j+1) &
+ a(i+1,j-1) + a(i-1,j+1) &
+ a(i-1,j-1)
c(i,j) = 123
end do
where ((xyz(:,:,2) /= 0) .and. (c /= 0))
a = b/real(c)
elsewhere
a = 456
endwhere
end subroutine foo
end module m
$ gfortran -v -c -Ofast y.f90
Using built-in specs.
COLLECT_GCC=gfortran
Target: aarch64-none-linux-gnu
Configured with: /tmp/native-aarch64-none-linux-gnu/build/src/gcc/configure
--disable-bootstrap
--with-isl=/tmp/native-aarch64-none-linux-gnu/build/build-native-aarch64-none-linux-gnu/host-tools
--with-cloog=/tmp/native-aarch64-none-linux-gnu/build/build-native-aarch64-none-linux-gnu/host-tools
--with-build-sysroot=/tmp/native-aarch64-none-linux-gnu/build/build-native-aarch64-none-linux-gnu/install/glibc
--build=aarch64-none-linux-gnu --host=aarch64-none-linux-gnu
--target=aarch64-none-linux-gnu --prefix=/ --enable-languages=c,c++,fortran
--enable-plugin
--with-gmp=/tmp/native-aarch64-none-linux-gnu/build/build-native-aarch64-none-linux-gnu/host-tools
--with-mpfr=/tmp/native-aarch64-none-linux-gnu/build/build-native-aarch64-none-linux-gnu/host-tools
--with-mpc=/tmp/native-aarch64-none-linux-gnu/build/build-native-aarch64-none-linux-gnu/host-tools
--with-gnu-ld --with-plugin-ld=ld --disable-libsanitizer --disable-werror
Thread model: posix
gcc version 5.3.1 20160415
COLLECT_GCC_OPTIONS='-v' '-c' '-Ofast' '-mlittle-endian' '-mabi=lp64'
/usr/bin/../libexec/gcc/aarch64-none-linux-gnu/5.3.1/f951 y.f90 -quiet
-dumpbase y.f90 -mlittle-endian -mabi=lp64 -auxbase y -Ofast -version
-fintrinsic-modules-path
/usr/bin/../lib/gcc/aarch64-none-linux-gnu/5.3.1/finclude -o /tmp/ccIYeMBK.s
GNU Fortran version 5.3.1 20160415 (aarch64-none-linux-gnu)
compiled by GNU C version 4.8.4, GMP version 4.3.2, MPFR version 3.0.0,
MPC version 0.8.2
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU Fortran2008 version 5.3.1 20160415 (aarch64-none-linux-gnu)
compiled by GNU C version 4.8.4, GMP version 4.3.2, MPFR version 3.0.0,
MPC version 0.8.2
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
y.f90:13:0:
subroutine foo(a)
^
internal compiler error: 291) version 5.oot_vars, at tree-predcom.c:1495
0xa8dae3 initialize_root_vars
/tmp/native-aarch64-none-linux-gnu/build/src/gcc/gcc/tree-predcom.c:1495
0xa8dae3 initialize_root
/tmp/native-aarch64-none-linux-gnu/build/src/gcc/gcc/tree-predcom.c:1542
0xa8dae3 execute_pred_commoning_chain
/tmp/native-aarch64-none-linux-gnu/build/src/gcc/gcc/tree-predcom.c:1756
0xa8dae3 execute_pred_commoning
/tmp/native-aarch64-none-linux-gnu/build/src/gcc/gcc/tree-predcom.c:1822
0xa8f583 tree_predictive_commoning_loop
/tmp/native-aarch64-none-linux-gnu/build/src/gcc/gcc/tree-predcom.c:2585
0xa90b63 tree_predictive_commoning()
/tmp/native-aarch64-none-linux-gnu/build/src/gcc/gcc/tree-predcom.c:2612
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
>From gcc-bugs-return-522928-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 15:46:20 2016
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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/70754] [5/6 Regression] ICE during predictive commoning
Date: Thu, 21 Apr 2016 15:46:00 -0000
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ktkachov at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |aarch64-unknown-linux-gnu
Status|UNCONFIRMED |NEW
Known to work| |4.9.4
Keywords| |ice-on-valid-code
Last reconfirmed| |2016-04-21
CC| |ktkachov at gcc dot gnu.org
Ever confirmed|0 |1
Summary|ICE during predictive |[5/6 Regression] ICE during
|commoning |predictive commoning
Known to fail| |5.3.1, 6.0, 7.0
--- Comment #1 from ktkachov at gcc dot gnu.org ---
Confirmed with GCC 5 and onwards.
I don't see this ICE on arm-none-linux-gnueabihf or x86_64
>From gcc-bugs-return-522929-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 16:27:29 2016
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Subject: [Bug tree-optimization/69489] missed vectorization for boolean loop, missed if-conversion
Date: Thu, 21 Apr 2016 16:27:00 -0000
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--- Comment #13 from amker at gcc dot gnu.org ---
(In reply to Julian Taylor from comment #12)
> the testcase in this ticket is not yet vectorized with gcc 20160421 (r235341)
Hi Julian, may I ask which target? It can be vectorized on x86_64 and AArch64
now. Thanks.
>From gcc-bugs-return-522930-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 16:30:51 2016
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Subject: [Bug libfortran/70684] [4.9/5/6/7 Regression] incorrect reading of values from file on Windows
Date: Thu, 21 Apr 2016 16:30:00 -0000
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--- Comment #10 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
(In reply to Ray Donnelly from comment #9)
> Should the other two places - next_char_default () and next_char_internal ()
> -that also do:
>
> dtp->u.p.at_eol = (c == '\n' || c == EOF);
>
> not check for '\r' too?
Placing it in next_char_default gives us a regression elsewhere. I am actually
checking to see if after my patch whether the line above is even needed in
next_char_default. There are a lot of subtle interactions that go into this
code, so i tread lightly.
I will not close this until I have the initial patch back ported and have done
some more testing and others have had time to do more testing. If you happen
to find a use case that fails, of course, let me know, and thanks.
>From gcc-bugs-return-522931-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 16:34:58 2016
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Subject: [Bug c++/70755] New: [ARM] excessive struct alignment for globals
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Bug ID: 70755
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Discussion at the end
$ arm-none-eabi-g++.exe -std=c++11 -Ofast -c align_foo.cpp -S -fdata-sections
$ cat align_foo.cpp
struct S
{
bool val;
};
S s1; // 32 bit align
alignas(S) S s2; // 8 bit align
struct alignas(bool) SA
{
bool val;
};
struct alignas(long long) SB
{
bool val;
};
SA sa; // 32 bit align
SB sb; // 64 bit align
$ cat align_foo.s
.cpu arm7tdmi
.fpu softvfp
.eabi_attribute 23, 1
.eabi_attribute 24, 1
.eabi_attribute 25, 1
.eabi_attribute 26, 1
.eabi_attribute 30, 2
.eabi_attribute 34, 0
.eabi_attribute 18, 4
.arm
.syntax divided
.file "align_foo.cpp"
.global sb
.global sa
.global s2
.global s1
.section .bss.s1,"aw",%nobits
.align 2
.type s1, %object
.size s1, 1
s1:
.space 1
.section .bss.s2,"aw",%nobits
.type s2, %object
.size s2, 1
s2:
.space 1
.section .bss.sa,"aw",%nobits
.align 2
.type sa, %object
.size sa, 1
sa:
.space 1
.section .bss.sb,"aw",%nobits
.align 3
.type sb, %object
.size sb, 8
sb:
.space 8
.ident "GCC: (GNU Tools for ARM Embedded Processors) 5.3.1 20160307
(release) [ARM/embedded-5-branch revision 234589]"
---
The code comments show how the respective variable was aligned in the assembly
output.
a) s1 should be byte aligned.
b) alignas works around the problem but only for s2 but not SA. Even though the
compiler clearly accepts the alignment increase for SB.
c) sb blocks 8 bytes, rather then just being 8 byte aligned
"-fdata-sections" is for clarity, without it we get basically the same,
although for sa the alignment could be unintentional:
...
.bss
.align 3
.type sb, %object
.size sb, 8
sb:
.space 8
.type sa, %object
.size sa, 1
sa:
.space 1
.type s2, %object
.size s2, 1
s2:
.space 1
.space 2
.type s1, %object
.size s1, 1
s1:
.space 1
>From gcc-bugs-return-522932-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 16:42:42 2016
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Subject: [Bug tree-optimization/69489] missed vectorization for boolean loop, missed if-conversion
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--- Comment #14 from Julian Taylor <jtaylor.debian at googlemail dot com> ---
I am on x86_64. It actually does vectorize with -mavx but not with -msse2.
The other variant of the loop I posted does vectorize with sse2.
$ gcc --version
gcc (GCC) 7.0.0 20160421 (experimental)
Copyright (C) 2016 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
$ cat test.c
double
yule_bool_distance_char2(const char *u, const char *v, long n)
{
long i;
long ntt = 0l, nff = 0l, nft = 0l, ntf = 0l;
for (i = 0l; i < n; i++) {
ntf += (u[i] && !v[i]);
nft += (!u[i] && v[i]);
}
return (2.0 * ntf * nft);
}
$ gcc -O2 -ftree-vectorize test.c -c
#same with O3
$ objdump -d test.o
test.o: file format elf64-x86-64
Disassembly of section .text:
0000000000000000 <yule_bool_distance_char2>:
0: 48 85 d2 test %rdx,%rdx
3: 7e 69 jle 6e <yule_bool_distance_char2+0x6e>
5: 55 push %rbp
6: 53 push %rbx
7: 45 31 d2 xor %r10d,%r10d
a: 45 31 db xor %r11d,%r11d
d: 31 c0 xor %eax,%eax
f: 31 ed xor %ebp,%ebp
11: 0f 1f 80 00 00 00 00 nopl 0x0(%rax)
18: 44 0f b6 0c 06 movzbl (%rsi,%rax,1),%r9d
1d: 44 0f b6 04 07 movzbl (%rdi,%rax,1),%r8d
22: 45 84 c9 test %r9b,%r9b
25: 0f 94 c3 sete %bl
28: 31 c9 xor %ecx,%ecx
2a: 45 84 c0 test %r8b,%r8b
2d: 0f 95 c1 setne %cl
30: 48 21 d9 and %rbx,%rcx
33: 49 01 ca add %rcx,%r10
36: 31 c9 xor %ecx,%ecx
38: 45 84 c9 test %r9b,%r9b
3b: 0f 95 c1 setne %cl
3e: 45 84 c0 test %r8b,%r8b
41: 48 0f 45 cd cmovne %rbp,%rcx
45: 48 83 c0 01 add $0x1,%rax
49: 49 01 cb add %rcx,%r11
4c: 48 39 c2 cmp %rax,%rdx
4f: 75 c7 jne 18 <yule_bool_distance_char2+0x18>
51: 66 0f ef c0 pxor %xmm0,%xmm0
55: 66 0f ef c9 pxor %xmm1,%xmm1
59: 5b pop %rbx
5a: f2 49 0f 2a c2 cvtsi2sd %r10,%xmm0
5f: f2 49 0f 2a cb cvtsi2sd %r11,%xmm1
64: 5d pop %rbp
65: f2 0f 58 c0 addsd %xmm0,%xmm0
69: f2 0f 59 c1 mulsd %xmm1,%xmm0
6d: c3 retq
6e: 66 0f ef c0 pxor %xmm0,%xmm0
72: c3 retq
>From gcc-bugs-return-522933-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 16:42:55 2016
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Subject: [Bug c++/70744] preincrements possibly double-evaluated in GNU ternaries
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--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
So build_conditional_expr_1 has
4626 /* As a G++ extension, the second argument to the conditional can be
4627 omitted. (So that `a ? : c' is roughly equivalent to `a ? a :
4628 c'.) If the second operand is omitted, make sure it is
4629 calculated only once. */
4630 if (!arg2)
4631 {
...
4636 /* Make sure that lvalues remain lvalues. See g++.oliva/ext1.C.
*/
4637 if (real_lvalue_p (arg1))
4638 arg2 = arg1 = stabilize_reference (arg1);
4639 else
4640 arg2 = arg1 = save_expr (arg1);
4641 }
for preincrement_expr is real_lvalue_p true, so we go to stabilize_reference,
that should ensure that we can use the expr more times without causing its
operands to be evaluated more than once, but it doesn't know
{PRE,POST}{INCR,DECR}EMENT so does nothing:
4258 /* If arg isn't a kind of lvalue we recognize, make no change.
4259 Caller should recognize the error for an invalid lvalue. */
4260 default:
4261 return ref;
>From gcc-bugs-return-522934-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 16:48:37 2016
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Subject: [Bug target/70750] [6/7 Regression] Load and call no longer combined for indirect calls on x86
Date: Thu, 21 Apr 2016 16:48:00 -0000
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-21
CC| |hjl.tools at gmail dot com,
| |ubizjak at gmail dot com
Ever confirmed|0 |1
--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> ---
It is very likely caused by r231923.
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Subject: [Bug c++/70513] [4.9/5/6/7 Regression] ICE on invalid C++ code on x86_64-linux-gnu: Segmentation fault
Date: Thu, 21 Apr 2016 16:53:00 -0000
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--- Comment #6 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Thu Apr 21 16:52:51 2016
New Revision: 235347
URL: https://gcc.gnu.org/viewcvs?rev=235347&root=gcc&view=rev
Log:
PR c++/70513
* parser.c (cp_parser_enum_specifier): Check and possibly error for
extra qualification.
* g++.dg/cpp0x/forw_enum12.C: New test.
* g++.dg/cpp0x/forw_enum13.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/forw_enum12.C
trunk/gcc/testsuite/g++.dg/cpp0x/forw_enum13.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/parser.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/70513] [4.9/5/6 Regression] ICE on invalid C++ code on x86_64-linux-gnu: Segmentation fault
Date: Thu, 21 Apr 2016 16:54:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
Summary|[4.9/5/6/7 Regression] ICE |[4.9/5/6 Regression] ICE on
|on invalid C++ code on |invalid C++ code on
|x86_64-linux-gnu: |x86_64-linux-gnu:
|Segmentation fault |Segmentation fault
--- Comment #7 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed for GCC 7. Not really planning to backport it.
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Subject: [Bug c/70756] New: Wrong column number shown for "error: invalid use of flexible array member"
Date: Thu, 21 Apr 2016 17:01:00 -0000
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Bug ID: 70756
Summary: Wrong column number shown for "error: invalid use of
flexible array member"
Product: gcc
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When compiling this program:
int main()
{
struct {
int x;
int y[];
} s;
12345 && &s.y + 1;
}
I get the following error message:
$ gcc example.c
example.c: In function ‘main’:
example.c:8:3: error: invalid use of flexible array member
12345 && &s.y + 1;
^~~~~
The column number is wrong.
>From gcc-bugs-return-522938-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 17:03:49 2016
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug plugins/70757] New: Add plugin callbacks that run early enough to check for declarations using "bad" names
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Bug ID: 70757
Summary: Add plugin callbacks that run early enough to check
for declarations using "bad" names
Product: gcc
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I once tried to write a gcc plugin to check that libstdc++ was not defining any
non-standard names outside the reserved namespace, but quickly realised that
the plugin callbacks all happen too late, so that uninstantiated templates are
never seen by the plugin.
I also wanted it to check for the list of identifiers that are in the reserved
namespace, but need to be avoided in libstdc++ for other reasons, as
documetented at
https://gcc.gnu.org/onlinedocs/libstdc++/manual/source_code_style.html#coding_style.bad_identifiers
I would like a callback in the front-end so that names of decls could be
checked, and ideally the same thing during preprocessing so that macros can
also be checked.
This would help avoid/find bugs like PR 70727 and PR 64135, and would also
allow users to write the opposite plugin, to check that user code doesn't
define anything using reserved names, solving PR 51437.
See also https://gcc.gnu.org/ml/gcc/2016-04/msg00200.html
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Subject: [Bug target/70750] [6/7 Regression] Load and call no longer combined for indirect calls on x86
Date: Thu, 21 Apr 2016 17:34:00 -0000
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--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> ---
r231923 has
(define_special_predicate "call_insn_operand"
(ior (match_test "constant_call_address_operand
(op, mode == VOIDmode ? mode : Pmode)")
(match_operand 0 "call_register_no_elim_operand")
- (and (not (match_test "TARGET_X32"))
- (match_operand 0 "memory_operand"))))
+ (ior (and (not (match_test "TARGET_X32"))
+ (match_operand 0 "sibcall_memory_operand"))
^^^^^^^^^^^^^^^^^^^^^^^^ A typo.
+ (and (match_test "TARGET_X32 && Pmode == DImode")
+ (match_operand 0 "GOT_memory_operand")))))
I am testing
diff --git a/gcc/config/i386/predicates.md b/gcc/config/i386/predicates.md
index 14e80d9..93dda7b 100644
--- a/gcc/config/i386/predicates.md
+++ b/gcc/config/i386/predicates.md
@@ -637,7 +637,7 @@
(op, mode == VOIDmode ? mode : Pmode)")
(match_operand 0 "call_register_no_elim_operand")
(ior (and (not (match_test "TARGET_X32"))
- (match_operand 0 "sibcall_memory_operand"))
+ (match_operand 0 "memory_operand"))
(and (match_test "TARGET_X32 && Pmode == DImode")
(match_operand 0 "GOT_memory_operand")))))
>From gcc-bugs-return-522940-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 17:34:55 2016
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Subject: [Bug libfortran/70684] [4.9/5/6/7 Regression] incorrect reading of values from file on Windows
Date: Thu, 21 Apr 2016 17:34:00 -0000
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--- Comment #11 from Ray Donnelly <mingw.android at gmail dot com> ---
I wonder if opening the files in text mode on Windows would be
possible? I don't know a lot about fortran at present, but doing that
would cause Windows to dump the \r's for you.
On Thu, Apr 21, 2016 at 5:30 PM, jvdelisle at gcc dot gnu.org
<gcc-bugzilla@gcc.gnu.org> wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70684
>
> --- Comment #10 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
> (In reply to Ray Donnelly from comment #9)
>> Should the other two places - next_char_default () and next_char_internal ()
>> -that also do:
>>
>> dtp->u.p.at_eol = (c == '\n' || c == EOF);
>>
>> not check for '\r' too?
>
> Placing it in next_char_default gives us a regression elsewhere. I am actually
> checking to see if after my patch whether the line above is even needed in
> next_char_default. There are a lot of subtle interactions that go into this
> code, so i tread lightly.
>
> I will not close this until I have the initial patch back ported and have done
> some more testing and others have had time to do more testing. If you happen
> to find a use case that fails, of course, let me know, and thanks.
>
> --
> You are receiving this mail because:
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>From gcc-bugs-return-522941-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 17:36:51 2016
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From: "2013.bugzilla.gcc.gnu.org at ingomueller dot net" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70758] New: unique_ptr<T[]> of aligned T calls invalid free
Date: Thu, 21 Apr 2016 17:36:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70758
Bug ID: 70758
Summary: unique_ptr<T[]> of aligned T calls invalid free
Product: gcc
Version: 4.9.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: 2013.bugzilla.gcc.gnu.org at ingomueller dot net
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Created attachment 38321
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38321&action=edit
Example c++ program that produces the invalid free.
In a certain situation, the default delete of a unique_ptr<T[]> calls an
invalid free.
The situation occurs for a struct that as an __attributed__ ((aligned(x))) with
a google dense_hash_map as a member. I haven't been able to figure out what is
special about the dense_hash_map yet. A short version of the code that produces
the bug (full version is attached):
typedef google::dense_hash_map<uint32_t,uint32_t> HmType;
typedef struct C {
HmType hm;
} C __attribute__ ((aligned(64)));
int main(int,char**)
{
std::unique_ptr<C[]> cx( new C[100] );
}
The free called by delete [] called by the deleter of the unique pointer is
invalid: valgrind says it is "56 bytes inside a block of size 8,064 alloc'd".
To reproduce:
1) Install google sparsehash-2.0.3
(https://github.com/sparsehash/sparsehash/releases).
2) Compile and run with valgrind: g++ -std=c++11 uniqueptr.cpp && valgrind
./a.out
Relevant output:
==7631== Invalid free() / delete / delete[] / realloc()
==7631== at 0x4C2A8E0: operator delete[](void*) (in
/usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==7631== by 0x401D3D: std::default_delete<C []>::operator()(C*) const (in
/tmp/a.out)
==7631== by 0x4018B4: std::unique_ptr<C [], std::default_delete<C []>
>::~unique_ptr() (in /tmp/a.out)
==7631== by 0x400D10: main (in /tmp/a.out)
==7631== Address 0x5a07fd8 is 56 bytes inside a block of size 8,064 alloc'd
==7631== at 0x4C298A0: operator new[](unsigned long) (in
/usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==7631== by 0x400CBB: main (in /tmp/a.out)
Other remark: g++ warns that it ignores attributes on C of the unique_ptr<C>,
but doesn't warn on unique_ptr<C[]>. Maybe it should ignore the alignment for
the array as well, but doesn't?
>From gcc-bugs-return-522942-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 17:43:13 2016
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Subject: [Bug target/70750] [6/7 Regression] Load and call no longer combined for indirect calls on x86
Date: Thu, 21 Apr 2016 17:43:00 -0000
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--- Comment #4 from H.J. Lu <hjl.tools at gmail dot com> ---
Created attachment 38322
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38322&action=edit
A patch
>From gcc-bugs-return-522943-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 17:50:45 2016
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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++/70744] preincrements possibly double-evaluated in GNU ternaries
Date: Thu, 21 Apr 2016 17:50:00 -0000
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--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
A possible fix seems to be
--- a/gcc/tree.c
+++ b/gcc/tree.c
@@ -4255,6 +4255,12 @@ stabilize_reference (tree ref)
volatiles. */
return stabilize_reference_1 (ref);
+ case POSTDECREMENT_EXPR:
+ case POSTINCREMENT_EXPR:
+ case PREDECREMENT_EXPR:
+ case PREINCREMENT_EXPR:
+ return stabilize_reference_1 (ref);
+
/* If arg isn't a kind of lvalue we recognize, make no change.
Caller should recognize the error for an invalid lvalue. */
default:
but not sure if these belong into stabilize_reference ...
>From gcc-bugs-return-522944-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 17:53:29 2016
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Subject: [Bug c/70756] Wrong column number shown for "error: invalid use of flexible array member"
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-21
CC| |mpolacek at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Confirmed.
>From gcc-bugs-return-522945-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 17:58:57 2016
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Subject: [Bug libfortran/70684] [4.9/5/6/7 Regression] incorrect reading of values from file on Windows
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--- Comment #12 from Andy May <ajmay81 at googlemail dot com> ---
I don't know that it's necessary or desired to support both '\n' and '\r' as
eol, but instead the native eol just needs to be used consistently everywhere,
for example something like the following pseudo code:
#ifdef __MINGW32__
#define EOL '\r'
#else
#define EOL '\n'
#endif
...
dtp->u.p.at_eol = (c == EOL || c == EOF);
As mentioned in this ifort thread:
https://software.intel.com/en-us/forums/intel-fortran-compiler-for-linux-and-mac-os-x/topic/268116
you might really want to read the 'wrong' eol as data.
If one wants to move a file generated on one OS to another there are tools
already existing to change the line endings.
>From gcc-bugs-return-522946-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 18:01:07 2016
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Subject: [Bug c++/70758] unique_ptr<T[]> of aligned T calls invalid free
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--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
I think this is a dup of PR 36159.
>From gcc-bugs-return-522947-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 18:10:12 2016
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From: "donald.chai at synopsys dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70744] preincrements possibly double-evaluated in GNU ternaries
Date: Thu, 21 Apr 2016 18:10:00 -0000
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--- Comment #5 from Donald Chai <donald.chai at synopsys dot com> ---
For what it's worth, post-increments behave as I would expect:
$ cat test.c
int main() {
int x = 1;
x++ ?: 0xbeef;
return x;
}
$ gcc-5 -x c test.c; ./a.out; echo $?
2
$ gcc-5 -x c++ test.c; ./a.out; echo $?
2
>From gcc-bugs-return-522948-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 18:16:56 2016
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From: "jvdelisle at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libfortran/70684] [4.9/5/6/7 Regression] incorrect reading of values from file on Windows
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--- Comment #13 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
(In reply to Andy May from comment #12)
> I don't know that it's necessary or desired to support both '\n' and '\r' as
> eol, but instead the native eol just needs to be used consistently
> everywhere, for example something like the following pseudo code:
>
> #ifdef __MINGW32__
> #define EOL '\r'
> #else
> #define EOL '\n'
> #endif
> ...
> dtp->u.p.at_eol = (c == EOL || c == EOF);
>
Each compiler may choose to do this a little differently. In our case we see
/r and look for the /n to eat it. If one is interested in reading a /r as data
one should use access="stream" which allows you to do what ever you want.
I could do something like the above, but it would touch quite a few places in
the code which opens it up for mistakes and regressions (admittedly probably
not any more than we get now and we could improve maintainability). Our
personal time is a factor too. I have bigger bugs to fry and I don't get paid
to do this. I do it in my spare time for the greater good of all. Regardless
I do appreciate all input in this process of "open" software. (I should further
audit the code when I get a chance)
>From gcc-bugs-return-522949-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 18:19:52 2016
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70758] unique_ptr<T[]> of aligned T calls invalid free
Date: Thu, 21 Apr 2016 18:19:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2016-04-21
Ever confirmed|0 |1
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Ingo Müller from comment #0)
> To reproduce:
> 1) Install google sparsehash-2.0.3
> (https://github.com/sparsehash/sparsehash/releases).
> 2) Compile and run with valgrind: g++ -std=c++11 uniqueptr.cpp && valgrind
> ./a.out
Please read https://gcc.gnu.org/bugs/#report (as requested when creating the
bug report).
Although I think HJ is probably right about it being a dup.
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From: "daniel.gutson at tallertechnologies dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/70742] Support div as a builtin
Date: Thu, 21 Apr 2016 18:47:00 -0000
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--- Comment #9 from Daniel Gutson <daniel.gutson at tallertechnologies dot com> ---
Created attachment 38323
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38323&action=edit
sample script to be called from the build system
>From gcc-bugs-return-522951-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 18:48:32 2016
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From: "daniel.gutson at tallertechnologies dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/70742] Support div as a builtin
Date: Thu, 21 Apr 2016 18:48:00 -0000
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--- Comment #10 from Daniel Gutson <daniel.gutson at tallertechnologies dot com> ---
(In reply to Marc Glisse from comment #8)
> "The div, ldiv, and lldiv functions return a structure of type div_t,
> ldiv_t, and lldiv_t, respectively, comprising both the quotient and the
> remainder. The structures shall contain (in either order) the members quot
> (the quotient) and rem (the remainder), each of which has the same type as
> the arguments numer and denom."
>
> So while we know the names and types of the fields, we don't know their
> order (unless stdlib.h was included).
IIUC, this is a new situation that has never occurred before regarding
builtins.
If so, maybe a new mechanism should be developed, that we add a couple of
offsetof(div_t) sometime during the building of gcc so the offsets are known by
the builtins. IOW, some kind of script invoked by the build system that
generates a header file containing the offsets of the members of the
structure...
Maybe something like the attachment
(https://gcc.gnu.org/bugzilla/attachment.cgi?id=38323)
Then, we include the generated header file (which contains the offsets) from
the source file that implements the builtin.
Would this be acceptable? I'm not sure what about the first time when
bootstrapping, or when building a cross-compiler.
>From gcc-bugs-return-522952-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 19:03:39 2016
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From: "marcos.diaz at tallertechnologies dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/70742] Support div as a builtin
Date: Thu, 21 Apr 2016 19:03:00 -0000
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--- Comment #11 from Marcos Diaz <marcos.diaz at tallertechnologies dot com> ---
(In reply to Daniel Gutson from comment #10)
> (In reply to Marc Glisse from comment #8)
> > "The div, ldiv, and lldiv functions return a structure of type div_t,
> > ldiv_t, and lldiv_t, respectively, comprising both the quotient and the
> > remainder. The structures shall contain (in either order) the members quot
> > (the quotient) and rem (the remainder), each of which has the same type as
> > the arguments numer and denom."
> >
> > So while we know the names and types of the fields, we don't know their
> > order (unless stdlib.h was included).
>
>
> IIUC, this is a new situation that has never occurred before regarding
> builtins.
> If so, maybe a new mechanism should be developed, that we add a couple of
> offsetof(div_t) sometime during the building of gcc so the offsets are known
> by the builtins. IOW, some kind of script invoked by the build system that
> generates a header file containing the offsets of the members of the
> structure...
> Maybe something like the attachment
> (https://gcc.gnu.org/bugzilla/attachment.cgi?id=38323)
> Then, we include the generated header file (which contains the offsets) from
> the source file that implements the builtin.
>
> Would this be acceptable? I'm not sure what about the first time when
> bootstrapping, or when building a cross-compiler.
But that way the offsets will remain hard-coded into the compiler, and it won't
will be able to work with another libc or user definition of div_t
>From gcc-bugs-return-522953-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 19:43:20 2016
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Subject: [Bug c++/70540] [4.9/5/6/7 Regression] ICE on invalid code in cxx_incomplete_type_diagnostic, at cp/typeck2.c:569
Date: Thu, 21 Apr 2016 19:43:00 -0000
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--- Comment #6 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> ---
Author: paolo
Date: Thu Apr 21 19:42:34 2016
New Revision: 235348
URL: https://gcc.gnu.org/viewcvs?rev=235348&root=gcc&view=rev
Log:
/cp
2016-04-21 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/70540
* semantics.c (process_outer_var_ref): Unconditionally return
error_mark_node when mark_used returns false.
/testsuite
2016-04-21 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/70540
* g++.dg/cpp0x/auto48.C: New.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/auto48.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/semantics.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-522954-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 19:46:38 2016
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Subject: [Bug c++/70540] [4.9/5/6 Regression] ICE on invalid code in cxx_incomplete_type_diagnostic, at cp/typeck2.c:569
Date: Thu, 21 Apr 2016 19:46:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[4.9/5/6/7 Regression] ICE |[4.9/5/6 Regression] ICE on
|on invalid code in |invalid code in
|cxx_incomplete_type_diagnos |cxx_incomplete_type_diagnos
|tic, at cp/typeck2.c:569 |tic, at cp/typeck2.c:569
--- Comment #7 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Fixed in trunk so far.
>From gcc-bugs-return-522955-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 19:50:08 2016
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Subject: [Bug c++/66067] [6 Regression] tree check ICE: accessed elt 1 of tree_vec with 0 elts in write_template_args, at cp/mangle.c:2574
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--- Comment #15 from Jason Merrill <jason at gcc dot gnu.org> ---
(In reply to Victoria from comment #14)
> issue not seen in GCC 5.x branch, is possible to backport the patch?
I don't understand. If the issue is not seen, why backport?
>From gcc-bugs-return-522957-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 20:08:32 2016
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Subject: [Bug ada/70759] New: Ada rts fails to build with -mabi=ilp32
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Bug ID: 70759
Summary: Ada rts fails to build with -mabi=ilp32
Product: gcc
Version: 6.0
Status: UNCONFIRMED
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Priority: P3
Component: ada
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Target: aarch64-*-*
Created attachment 38324
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38324&action=edit
a-assert.s
Trying to build with --with-multilib-list=lp64,ilp32 on aarch64 fails while
building the ada rts for -mabi=ilp32:
/home/abuild/rpmbuild/BUILD/gcc-6.0.0-r234449/obj-aarch64-suse-linux/./gcc/xgcc
-B/home/abuild/rpmbuild/BUILD/gcc-6.0.0-r234449/obj-aarch64-suse-linux/./gcc/
-B/usr/aarch64-suse-linux/bin/ -B/usr/aarch64-suse-linux/lib/ -isystem
/usr/aarch64-suse-linux/include -isystem /usr/aarch64-suse-linux/sys-include
-c -g -O2 -mabi=ilp32 -fPIC -W -Wall -gnatpg -nostdinc -mabi=ilp32
a-assert.adb -o a-assert.o -save-temps
a-assert.s: Assembler messages:
a-assert.s:114: Error: cannot represent BFD_RELOC_64 relocation in this object
file format
This is the offending definition:
.type ada__assertions__assertion_error, %object
.size ada__assertions__assertion_error, 8
ada__assertions__assertion_error:
.8byte system__assertions__assert_failure
.data
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From: "david.abdurachmanov at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/68331] [meta-bug] fipa-pta issues
Date: Thu, 21 Apr 2016 20:08:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68331
David Abdurachmanov <david.abdurachmanov at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |david.abdurachmanov at gmail dot c
| |om
--- Comment #10 from David Abdurachmanov <david.abdurachmanov at gmail dot com> ---
I have been reg-testing GCC 6 for the last few weeks and I hit an issue with
compile code straggly segfaulting.
Compiler with GCC 5.3.0, ASan and valgrind shows no issues. Compiled with GCC
6.0.1, ASan and valgrind shows issues, program segfaults. If I go below -O2,
the execution at least does not segfault. Developers so far couldn't understand
whats happening. No issues if compiled with latest Clang or ICC.
I am trying to understand if this is a potential GCC bug and it's worth filling
another BZ ticket. I am trying to reg-test as much as I can before GCC 6.1.0 is
cut. What are your thoughts?
Bisect brought me to this commit as being the culprit:
7ae97ba6651703d99d9f0e20a4e48eb7743c103c is the first bad commit
commit 7ae97ba6651703d99d9f0e20a4e48eb7743c103c
Author: rguenth <rguenth@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Thu Dec 10 09:41:08 2015 +0000
2015-12-10 Richard Biener <rguenther@suse.de>
PR ipa/68331
[..]
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@231498
138bc75d-0d04-0410-961f-82ee72b054a4
What fails is:
421 std::unique_ptr<ParameterDescriptionNode> node =
std::make_unique<ParameterDescription<T>>(iLabel, value, isTracked);
422 ParameterDescriptionNode* pnode = addNode(std::move(node), isOptional,
writeToCfi);
addNode will segfault std::unique_ptr content is wrong. If one would do
node.get() you get 0x100000000 trying to access such memory will cause
segfault.
So, I took 7ae97ba6651703d99d9f0e20a4e48eb7743c103c (first bad commit) and
6c2acfc4892316b46df0fe4a6769fb6766ab1e0b (last good) and compared assembly for
edmtest::ProducerWithPSetDesc::fillDescriptions(edm::ConfigurationDescriptions&).
I found no significant differences, all are offsets. I know that the second
call to edm::ParameterSetDescription::addNode fails.
[..]
48 1f5f1: e8 9a 7d ff ff callq 17390
<edm::ParameterDescriptionBase* edm::ParameterSetDescription::add<int, char
[6]>(char const (&) [6], int const&, bool, bool, bool)@plt>
49 1f5f6: 48 8d 35 d3 f4 01 00 lea 0x1f4d3(%rip),%rsi #
3ead0 <_fini+0x2a10>
50 1f5fd: 48 89 c7 mov %rax,%rdi
51 1f600: e8 db 83 ff ff callq 179e0
<edm::ParameterDescriptionNode::setComment(char const*)@plt>
52 1f605: 48 8d 85 50 fe ff ff lea -0x1b0(%rbp),%rax
53 1f60c: 48 8d bd 20 d7 ff ff lea -0x28e0(%rbp),%rdi
54 1f613: 48 8d 35 c9 cb 01 00 lea 0x1cbc9(%rip),%rsi #
3c1e3 <_fini+0x123>
55 1f61a: 31 c9 xor %ecx,%ecx
56 1f61c: c7 85 50 fe ff ff 01 movl $0x80000001,-0x1b0(%rbp)
57 1f623: 00 00 80
58 1f626: 48 89 c2 mov %rax,%rdx
59 1f629: 48 89 85 98 d0 ff ff mov %rax,-0x2f68(%rbp)
60 1f630: e8 7b 91 ff ff callq 187b0
<std::_MakeUniq<edm::ParameterDescription<int> >::__single_object
std::make_unique<edm::ParameterDescription<int>, char const (&) [16], int
const&, bool&>(char const (&) [16], int const&, bool&) [clone .isra.142] >
61 1f635: 48 8b 85 20 d7 ff ff mov -0x28e0(%rbp),%rax
62 1f63c: b9 01 00 00 00 mov $0x1,%ecx
63 1f641: 31 d2 xor %edx,%edx
64 1f643: 4c 89 f6 mov %r14,%rsi
65 1f646: 4c 89 ff mov %r15,%rdi
66 1f649: 48 89 85 10 ff ff ff mov %rax,-0xf0(%rbp)
67 1f650: e8 9b 77 ff ff callq 16df0
<edm::ParameterSetDescription::addNode(std::unique_ptr<edm::ParameterDescriptionNode,
std::default_delete<edm::ParameterDescriptionNode> >, bool, bool)@plt>
68 1f655: 48 8b bd 10 ff ff ff mov -0xf0(%rbp),%rdi
[..]
Before that it calls the cloned function. Pointer becomes wrong after line 66
[%rax,-0xf0(%rbp)]. Then I looked into cloned function between two commits.
This showed some differences:
3 @@ -19,7 +19,6 @@
4 48 89 df mov %rbx,%rdi
5 e8 75 e8 ff ff callq 17060 <edm
6 48 8b 05 a6 36 03 00 mov 0x336a6(%rip),%rax # 4be98
<_DYNAMIC+0x430>
7 - 49 89 1c 24 mov %rbx,(%r12)
8 48 83 c0 10 add $0x10,%rax
9 48 89 03 mov %rax,(%rbx)
10 41 8b 45 00 mov 0x0(%r13),%eax
11 @@ -34,9 +33,10 @@
12 48 89 c5 mov %rax,%rbp
13 48 89 df mov %rbx,%rdi
14 be 28 00 00 00 mov $0x28,%esi
15 - e8 50 e4 ff ff callq 16c70 <operator delete(void*,
unsigned long)@plt>
16 + e8 54 e4 ff ff callq 16c70 <operator delete(void*,
unsigned long)@plt>
17 48 89 ef mov %rbp,%rdi
18 - e8 48 ef ff ff callq 17770 <_Unwind_Resume@plt>
19 - 0f 1f 84 00 00 00 00 nopl 0x0(%rax,%rax,1)
20 - 00
21 + e8 4c ef ff ff callq 17770 <_Unwind_Resume@plt>
22 + 66 90 xchg %ax,%ax
23 + 66 2e 0f 1f 84 00 00 nopw %cs
24 + 00 00 00
##### ASAN REPORT #####
ASAN:DEADLYSIGNAL
=================================================================
==11345==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000018 (pc
0x2abffdb95e22 bp 0x7ffd8abe14b0 sp 0x7ffd8abe12c0 T0)
#0 0x2abffdb95e21 in
edm::ParameterDescriptionNode::checkAndGetLabelsAndTypes(std::set<std::string,
std::less<std::string>, std::allocator<std::string> >&,
std::set<edm::ParameterTypes, std::less<edm::ParameterTypes>,
std::allocator<edm::ParameterTypes> >&, std::set<e
dm::ParameterTypes, std::less<edm::ParameterTypes>,
std::allocator<edm::ParameterTypes> >&) const
/mnt/build/davidlt/CMSSW_8_1_X_2016-04-18-1100/src/FWCore/ParameterSet/interface/ParameterDescriptionNode.h:213
#1 0x2abffdb95e21 in
edm::ParameterSetDescription::addNode(std::unique_ptr<edm::ParameterDescriptionNode,
std::default_delete<edm::ParameterDescriptionNode> >, bool, bool)
/mnt/build/davidlt/CMSSW_8_1_X_2016-04-18-1100/src/FWCore/ParameterSet/src/ParameterSetDescripti
on.cc:92
#2 0x2ac0041a3961 in edm::ParameterDescriptionBase*
edm::ParameterSetDescription::add<int, char [16]>(char const (&) [16], int
const&, bool, bool, bool)
/mnt/build/davidlt/CMSSW_8_1_X_2016-04-18-1100/src/FWCore/ParameterSet/interface/ParameterSetDescription.h:422
#3 0x2ac0041a3961 in edm::ParameterDescriptionBase*
edm::ParameterSetDescription::addUntracked<int, char [16]>(char const (&) [16],
int const&)
/mnt/build/davidlt/CMSSW_8_1_X_2016-04-18-1100/src/FWCore/ParameterSet/interface/ParameterSetDescription.h:95
[..]
##### VALGRIND REPORT #####
These happens already after calling edm::ParameterSetDescription::addNode where
the pointer is already wrong.
==31968== Use of uninitialised value of size 8
==31968== at 0x40C7674: checkAndGetLabelsAndTypes
(ParameterDescriptionNode.h:213)
==31968== by 0x40C7674:
edm::ParameterSetDescription::addNode(std::unique_ptr<edm::ParameterDescriptionNode,
std::default_delete<edm::ParameterDescriptionNode> >, bool, bool)
(ParameterSetDescription.cc:92)
==31968== by 0x8705657: add<int, char [16]> (ParameterSetDescription.h:422)
==31968== by 0x8705657: addUntracked<int, char [16]>
(ParameterSetDescription.h:95)
==31968== by 0x8705657:
edmtest::ProducerWithPSetDesc::fillDescriptions(edm::ConfigurationDescriptions&)
(ProducerWithPSetDesc.cc:459)
==31968== by 0x871ABBB:
edm::ParameterSetDescriptionFiller<edmtest::ProducerWithPSetDesc>::fill(edm::ConfigurationDescriptions&)
const (ParameterSetDescriptionFiller.h:55)
==31968== by 0x4059BF: operator() (edmWriteConfigs.cpp:90)
==31968== by 0x4059BF: wrap<(anonymous namespace)::writeCfisForPlugin(const
string&, edm::ParameterSetDescriptionFillerPluginFactory*)::<lambda()> >
(ConvertException.h:20)
==31968== by 0x4059BF: writeCfisForPlugin (edmWriteConfigs.cpp:91)
==31968== by 0x4059BF: __call<void, std::basic_string<char,
std::char_traits<char>, std::allocator<char> >&, 0ul, 1ul> (functional:943)
==31968== by 0x4059BF: operator()<std::basic_string<char,
std::char_traits<char>, std::allocator<char> >&> (functional:1002)
==31968== by 0x4059BF:
for_each<__gnu_cxx::__normal_iterator<std::basic_string<char>*,
std::vector<std::basic_string<char> > >, std::_Bind<void
(*(std::_Placeholder<1>,
edmplugin::PluginFactory<edm::ParameterSetDescriptionFillerBase*()>*))(const
std::basic_string<cha
r>&, edmplugin::PluginFactory<edm::ParameterSetDescriptionFillerBase*()>*)> >
(stl_algo.h:3776)
==31968== by 0x4059BF: for_all<std::vector<std::basic_string<char> >,
std::_Bind<void (*(std::_Placeholder<1>,
edmplugin::PluginFactory<edm::ParameterSetDescriptionFillerBase*()>*))(const
std::basic_string<char>&, edmplugin::PluginFactory<edm::ParameterSetDescription
FillerBase*()>*)> > (Algorithms.h:17)
==31968== by 0x4059BF: operator() (edmWriteConfigs.cpp:285)
==31968== by 0x4059BF: wrap<main(int, char**)::<lambda()> >
(ConvertException.h:20)
==31968== by 0x4059BF: main (edmWriteConfigs.cpp:286)
==31968== Uninitialised value was created by a stack allocation
==31968== at 0x8705544:
edmtest::ProducerWithPSetDesc::fillDescriptions(edm::ConfigurationDescriptions&)
(ProducerWithPSetDesc.cc:438)
==31968==
==31968== Invalid read of size 8
==31968== at 0x40C7674: checkAndGetLabelsAndTypes
(ParameterDescriptionNode.h:213)
==31968== by 0x40C7674:
edm::ParameterSetDescription::addNode(std::unique_ptr<edm::ParameterDescriptionNode,
std::default_delete<edm::ParameterDescriptionNode> >, bool, bool)
(ParameterSetDescription.cc:92)
==31968== by 0x8705657: add<int, char [16]> (ParameterSetDescription.h:422)
==31968== by 0x8705657: addUntracked<int, char [16]>
(ParameterSetDescription.h:95)
==31968== by 0x8705657:
edmtest::ProducerWithPSetDesc::fillDescriptions(edm::ConfigurationDescriptions&)
(ProducerWithPSetDesc.cc:459)
==31968== by 0x871ABBB:
edm::ParameterSetDescriptionFiller<edmtest::ProducerWithPSetDesc>::fill(edm::ConfigurationDescriptions&)
const (ParameterSetDescriptionFiller.h:55)
==31968== by 0x4059BF: operator() (edmWriteConfigs.cpp:90)
==31968== by 0x4059BF: wrap<(anonymous namespace)::writeCfisForPlugin(const
string&, edm::ParameterSetDescriptionFillerPluginFactory*)::<lambda()> >
(ConvertException.h:20)
==31968== by 0x4059BF: writeCfisForPlugin (edmWriteConfigs.cpp:91)
==31968== by 0x4059BF: __call<void, std::basic_string<char,
std::char_traits<char>, std::allocator<char> >&, 0ul, 1ul> (functional:943)
==31968== by 0x4059BF: operator()<std::basic_string<char,
std::char_traits<char>, std::allocator<char> >&> (functional:1002)
==31968== by 0x4059BF:
for_each<__gnu_cxx::__normal_iterator<std::basic_string<char>*,
std::vector<std::basic_string<char> > >, std::_Bind<void
(*(std::_Placeholder<1>,
edmplugin::PluginFactory<edm::ParameterSetDescriptionFillerBase*()>*))(const
std::basic_string<cha
r>&, edmplugin::PluginFactory<edm::ParameterSetDescriptionFillerBase*()>*)> >
(stl_algo.h:3776)
==31968== by 0x4059BF: for_all<std::vector<std::basic_string<char> >,
std::_Bind<void (*(std::_Placeholder<1>,
edmplugin::PluginFactory<edm::ParameterSetDescriptionFillerBase*()>*))(const
std::basic_string<char>&, edmplugin::PluginFactory<edm::ParameterSetDescription
FillerBase*()>*)> > (Algorithms.h:17)
==31968== by 0x4059BF: operator() (edmWriteConfigs.cpp:285)
==31968== by 0x4059BF: wrap<main(int, char**)::<lambda()> >
(ConvertException.h:20)
==31968== by 0x4059BF: main (edmWriteConfigs.cpp:286)
==31968== Address 0x1ffdfeb5400000 is not stack'd, malloc'd or (recently)
free'd
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From: "david.abdurachmanov at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/68331] [meta-bug] fipa-pta issues
Date: Thu, 21 Apr 2016 20:28:00 -0000
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--- Comment #11 from David Abdurachmanov <david.abdurachmanov at gmail dot com> ---
"Good" code, annotated by me. Now notice from my previous message that the fix
for this PR, caused
49 89 1c 24 mov %rbx,(%r12)
to be removed. We lost one instruction which stored the address of allocated
objected via "pointer".
00000000000187b0 <std::_MakeUniq<edm::ParameterDescription<int>
>::__single_object std::make_unique<edm::ParameterDescription<int>, char const
(&) [16], int const&, bool&>(char const (&) [16], int const&, bool&) [clone
.isra.142]>:
187b0: 41 56 push %r14
187b2: 41 55 push %r13
187b4: 49 89 f6 mov %rsi,%r14
187b7: 41 54 push %r12
187b9: 55 push %rbp
187ba: 49 89 fc mov %rdi,%r12
187bd: 53 push %rbx
// Allocate 40 bytes on the heap
187be: bf 28 00 00 00 mov $0x28,%edi
187c3: 49 89 d5 mov %rdx,%r13
187c6: 0f b6 e9 movzbl %cl,%ebp
187c9: e8 62 e5 ff ff callq 16d30 <operator new(unsigned
long)@plt>
// Store returned pointer in RBX
187ce: 48 89 c3 mov %rax,%rbx
187d1: e8 da f8 ff ff callq 180b0 <edm::ParameterTypes
edm::ParameterTypeToEnum::toEnum<int>()@plt>
187d6: 41 b8 01 00 00 00 mov $0x1,%r8d
187dc: 89 e9 mov %ebp,%ecx
187de: 89 c2 mov %eax,%edx
187e0: 4c 89 f6 mov %r14,%rsi
// Call the ctor, pass pointer (this) from RBX
187e3: 48 89 df mov %rbx,%rdi
187e6: e8 75 e8 ff ff callq 17060
<edm::ParameterDescriptionBase::ParameterDescriptionBase(char const*,
edm::ParameterTypes, bool, bool)@plt>
187eb: 48 8b 05 a6 36 03 00 mov 0x336a6(%rip),%rax #
4be98 <_DYNAMIC+0x430>
// Store RBX to memory pointed by R12
187f2: 49 89 1c 24 mov %rbx,(%r12)
187f6: 48 83 c0 10 add $0x10,%rax
187fa: 48 89 03 mov %rax,(%rbx)
187fd: 41 8b 45 00 mov 0x0(%r13),%eax
18801: 89 43 20 mov %eax,0x20(%rbx)
// Put address in R12 into return register
18804: 4c 89 e0 mov %r12,%rax
18807: 5b pop %rbx
18808: 5d pop %rbp
18809: 41 5c pop %r12
1880b: 41 5d pop %r13
1880d: 41 5e pop %r14
1880f: c3 retq
18810: 48 89 c5 mov %rax,%rbp
18813: 48 89 df mov %rbx,%rdi
18816: be 28 00 00 00 mov $0x28,%esi
1881b: e8 50 e4 ff ff callq 16c70 <operator delete(void*,
unsigned long)@plt>
18820: 48 89 ef mov %rbp,%rdi
18823: e8 48 ef ff ff callq 17770 <_Unwind_Resume@plt>
18828: 0f 1f 84 00 00 00 00 nopl 0x0(%rax,%rax,1)
1882f: 00
>From gcc-bugs-return-522959-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 21:39:10 2016
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Subject: [Bug ipa/68331] [meta-bug] fipa-pta issues
Date: Thu, 21 Apr 2016 21:39:00 -0000
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--- Comment #12 from vries at gcc dot gnu.org ---
(In reply to David Abdurachmanov from comment #10)
> I have been reg-testing GCC 6 for the last few weeks and I hit an issue with
> compile code straggly segfaulting.
>
> Compiler with GCC 5.3.0, ASan and valgrind shows no issues. Compiled with
> GCC 6.0.1, ASan and valgrind shows issues, program segfaults. If I go below
> -O2, the execution at least does not segfault. Developers so far couldn't
> understand whats happening. No issues if compiled with latest Clang or ICC.
>
> I am trying to understand if this is a potential GCC bug and it's worth
> filling another BZ ticket. I am trying to reg-test as much as I can before
> GCC 6.1.0 is cut. What are your thoughts?
Thanks for your bisect effort and analysis. Please file a bugzilla ticket, and
include the testcase.
>From gcc-bugs-return-522960-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 21 22:02:20 2016
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Subject: [Bug target/70750] [6/7 Regression] Load and call no longer combined for indirect calls on x86
Date: Thu, 21 Apr 2016 22:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70750
--- Comment #5 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> ---
Author: hjl
Date: Thu Apr 21 22:01:34 2016
New Revision: 235353
URL: https://gcc.gnu.org/viewcvs?rev=235353&root=gcc&view=rev
Log:
X86: Fix a typo in call_insn_operand
r231923 has
;; Test for a valid operand for a call instruction.
;; Allow constant call address operands in Pmode only.
(define_special_predicate "call_insn_operand"
(ior (match_test "constant_call_address_operand
(op, mode == VOIDmode ? mode : Pmode)")
(match_operand 0 "call_register_no_elim_operand")
- (and (not (match_test "TARGET_X32"))
- (match_operand 0 "memory_operand"))))
+ (ior (and (not (match_test "TARGET_X32"))
+ (match_operand 0 "sibcall_memory_operand"))
^^^^^^^^^^^^^^^^^^^^^^^ A typo.
+ (and (match_test "TARGET_X32 && Pmode == DImode")
+ (match_operand 0 "GOT_memory_operand")))))
"sibcall_memory_operand" should be "memory_operand".
gcc/
PR target/70750
* config/i386/predicates.md (call_insn_operand): Replace
sibcall_memory_operand with memory_operand.
gcc/testsuite/
PR target/70750
* gcc.target/i386/pr70750-1.c: New test.
* gcc.target/i386/pr70750-2.c: Likewise.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr70750-1.c
trunk/gcc/testsuite/gcc.target/i386/pr70750-2.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/predicates.md
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug tree-optimization/70740] [7 Regression] ICE when compiling the Linux kernel (net/wireless/util.o)
Date: Fri, 22 Apr 2016 06:59:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70740
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug tree-optimization/70740] [7 Regression] ICE when compiling the Linux kernel (net/wireless/util.o)
Date: Fri, 22 Apr 2016 07:00:00 -0000
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--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri Apr 22 06:59:32 2016
New Revision: 235359
URL: https://gcc.gnu.org/viewcvs?rev=235359&root=gcc&view=rev
Log:
2016-04-22 Richard Biener <rguenther@suse.de>
PR tree-optimization/70740
* tree-ssa-phiprop.c (propagate_with_phi): Handle inserted
VDEF.
* gcc.dg/torture/pr70740.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr70740.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-phiprop.c
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/70760] New: [6 regression] wrong generated code for std::make_unique with -fipa-pta
Date: Fri, 22 Apr 2016 07:12:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70760
Bug ID: 70760
Summary: [6 regression] wrong generated code for
std::make_unique with -fipa-pta
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: ipa
Assignee: unassigned at gcc dot gnu.org
Reporter: david.abdurachmanov at gmail dot com
Target Milestone: ---
Created attachment 38325
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38325&action=edit
untouched preprocessed file
Hopefully this is truly the last issues I see with GCC 6 on x86_64 and our
software.
Compiler with GCC 5.3.0, ASan and valgrind shows no issues. Compiled with GCC
6.0.1, ASan and valgrind shows issues, program segfaults. If we disable
-fipa-pta the program compiles and runs successfully. Developers so far
couldn't understand whats happening, at least at C++ level from their point of
view everything is fine. No issues if compiled with latest Clang or ICC.
TL;DR doing .get() on std::unique_ptr in a bizarre 0x100000000 pointer. Of
course accessing later such address causes segfaults.
GIT bisect tracked down the issue to a fix for PR ipa/68331
(https://gcc.gnu.org/viewcvs?rev=231498&root=gcc&view=rev)
In git,
first bad: 7ae97ba6651703d99d9f0e20a4e48eb7743c103c
last good: 6c2acfc4892316b46df0fe4a6769fb6766ab1e0b
The following code is failing on C++ level:
421 std::unique_ptr<ParameterDescriptionNode> node =
std::make_unique<ParameterDescription<T>>(iLabel, value, isTracked);
422 ParameterDescriptionNode* pnode = addNode(std::move(node), isOptional,
writeToCfi);
addNode function segfauls once it tries access through 0x100000000 address
which is from std::unique_ptr.
I looked at addNode assembly and fully expected that it should segfault.
Nothing wrong found with it. I went one frame up to
edmtest::ProducerWithPSetDesc::fillDescriptions(edm::ConfigurationDescriptions&)
symbol, but found no significant differences in generated assembly between
those two commits. All differences were in offsets which looked fine.
I knew that it's 2nd call to addNode inside
edmtest::ProducerWithPSetDesc::fillDescriptions which caused the failure.
Before 2nd addNode call is done it called to
std::_MakeUniq<edm::ParameterDescription<int> >::__single_object
std::make_unique<edm::ParameterDescription<int>, char const (&) [16], int
const&, bool&>(char const (&) [16], int const&, bool&) [clone .isra.142] symbol
and after it the second argument (to be passed to addNode) was damaged with
bizarre 0x100000000 pointer at run-time.
"Good code" annotated by me is below for this std::make_unique function. Due to
-fipa-pta we loose one instruction which is related to return value from
std::make_unique:
3 @@ -19,7 +19,6 @@
4 48 89 df mov %rbx,%rdi
5 e8 75 e8 ff ff callq 17060 <edm
6 48 8b 05 a6 36 03 00 mov 0x336a6(%rip),%rax # 4be98
<_DYNAMIC+0x430>
7 - 49 89 1c 24 mov %rbx,(%r12)
8 48 83 c0 10 add $0x10,%rax
9 48 89 03 mov %rax,(%rbx)
10 41 8b 45 00 mov 0x0(%r13),%eax
11 @@ -34,9 +33,10 @@
12 48 89 c5 mov %rax,%rbp
13 48 89 df mov %rbx,%rdi
14 be 28 00 00 00 mov $0x28,%esi
15 - e8 50 e4 ff ff callq 16c70 <operator delete(void*,
unsigned long)@plt>
16 + e8 54 e4 ff ff callq 16c70 <operator delete(void*,
unsigned long)@plt>
17 48 89 ef mov %rbp,%rdi
18 - e8 48 ef ff ff callq 17770 <_Unwind_Resume@plt>
19 - 0f 1f 84 00 00 00 00 nopl 0x0(%rax,%rax,1)
20 - 00
21 + e8 4c ef ff ff callq 17770 <_Unwind_Resume@plt>
22 + 66 90 xchg %ax,%ax
23 + 66 2e 0f 1f 84 00 00 nopw %cs
24 + 00 00 00
In a "good code" it used to return a pointer to a pointer to internally
allocated object. That missing instruction was storing address of allocation on
heap to some memory location. Later we used to return R12. Without that
instruction R12 contains RDI. Thus we are basically returning the first
argument of std::make_unique.
I have rushed a bit, thus hopefully didn't make too many mistakes. That's the
only meaningful difference I can in see in assembly code in 3 related symbols.
Attaching the preprocessed file (untouched).
We compile it with:
c++ -c -O2 -std=c++1z -ftree-vectorize -fvisibility-inlines-hidden
-fno-math-errno --param vect-max-version-for-alias-checks=50 -fipa-pta -msse3
-felide-constructors -fPIC ProducerWithPSetDesc.ii
Again, removing -fipa-pta seems to solve the issue (bring back the missing
instruction).
##### GOOD ASM #####
00000000000187b0 <std::_MakeUniq<edm::ParameterDescription<int>
>::__single_object std::make_unique<edm::ParameterDescription<int>, char const
(&) [16], int const&, bool&>(char const (&) [16], int const&, bool&) [clone
.isra.142]>:
187b0: 41 56 push %r14
187b2: 41 55 push %r13
187b4: 49 89 f6 mov %rsi,%r14
187b7: 41 54 push %r12
187b9: 55 push %rbp
187ba: 49 89 fc mov %rdi,%r12
187bd: 53 push %rbx
// Allocate 40 bytes on the heap
187be: bf 28 00 00 00 mov $0x28,%edi
187c3: 49 89 d5 mov %rdx,%r13
187c6: 0f b6 e9 movzbl %cl,%ebp
187c9: e8 62 e5 ff ff callq 16d30 <operator new(unsigned
long)@plt>
// Store returned pointer in RBX
187ce: 48 89 c3 mov %rax,%rbx
187d1: e8 da f8 ff ff callq 180b0 <edm::ParameterTypes
edm::ParameterTypeToEnum::toEnum<int>()@plt>
187d6: 41 b8 01 00 00 00 mov $0x1,%r8d
187dc: 89 e9 mov %ebp,%ecx
187de: 89 c2 mov %eax,%edx
187e0: 4c 89 f6 mov %r14,%rsi
// Call the ctor, pass pointer (this) from RBX
187e3: 48 89 df mov %rbx,%rdi
187e6: e8 75 e8 ff ff callq 17060
<edm::ParameterDescriptionBase::ParameterDescriptionBase(char const*,
edm::ParameterTypes, bool, bool)@plt>
187eb: 48 8b 05 a6 36 03 00 mov 0x336a6(%rip),%rax #
4be98 <_DYNAMIC+0x430>
// Store RBX to memory pointed by R12
187f2: 49 89 1c 24 mov %rbx,(%r12)
187f6: 48 83 c0 10 add $0x10,%rax
187fa: 48 89 03 mov %rax,(%rbx)
187fd: 41 8b 45 00 mov 0x0(%r13),%eax
18801: 89 43 20 mov %eax,0x20(%rbx)
// Put address in R12 into return register
18804: 4c 89 e0 mov %r12,%rax
18807: 5b pop %rbx
18808: 5d pop %rbp
18809: 41 5c pop %r12
1880b: 41 5d pop %r13
1880d: 41 5e pop %r14
1880f: c3 retq
18810: 48 89 c5 mov %rax,%rbp
18813: 48 89 df mov %rbx,%rdi
18816: be 28 00 00 00 mov $0x28,%esi
1881b: e8 50 e4 ff ff callq 16c70 <operator delete(void*,
unsigned long)@plt>
18820: 48 89 ef mov %rbp,%rdi
18823: e8 48 ef ff ff callq 17770 <_Unwind_Resume@plt>
18828: 0f 1f 84 00 00 00 00 nopl 0x0(%rax,%rax,1)
1882f: 00
##### ASAN REPORT #####
ASAN:DEADLYSIGNAL
=================================================================
==11345==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000018 (pc
0x2abffdb95e22 bp 0x7ffd8abe14b0 sp 0x7ffd8abe12c0 T0)
#0 0x2abffdb95e21 in
edm::ParameterDescriptionNode::checkAndGetLabelsAndTypes(std::set<std::string,
std::less<std::string>, std::allocator<std::string> >&,
std::set<edm::ParameterTypes, std::less<edm::ParameterTypes>,
std::allocator<edm::ParameterTypes> >&, std::set<e
dm::ParameterTypes, std::less<edm::ParameterTypes>,
std::allocator<edm::ParameterTypes> >&) const
/mnt/build/davidlt/CMSSW_8_1_X_2016-04-18-1100/src/FWCore/ParameterSet/interface/ParameterDescriptionNode.h:213
#1 0x2abffdb95e21 in
edm::ParameterSetDescription::addNode(std::unique_ptr<edm::ParameterDescriptionNode,
std::default_delete<edm::ParameterDescriptionNode> >, bool, bool)
/mnt/build/davidlt/CMSSW_8_1_X_2016-04-18-1100/src/FWCore/ParameterSet/src/ParameterSetDescripti
on.cc:92
#2 0x2ac0041a3961 in edm::ParameterDescriptionBase*
edm::ParameterSetDescription::add<int, char [16]>(char const (&) [16], int
const&, bool, bool, bool)
/mnt/build/davidlt/CMSSW_8_1_X_2016-04-18-1100/src/FWCore/ParameterSet/interface/ParameterSetDescription.h:422
#3 0x2ac0041a3961 in edm::ParameterDescriptionBase*
edm::ParameterSetDescription::addUntracked<int, char [16]>(char const (&) [16],
int const&)
/mnt/build/davidlt/CMSSW_8_1_X_2016-04-18-1100/src/FWCore/ParameterSet/interface/ParameterSetDescription.h:95
[..]
##### VALGRIND REPORT #####
These happens already after calling edm::ParameterSetDescription::addNode where
the pointer is already wrong.
==31968== Use of uninitialised value of size 8
==31968== at 0x40C7674: checkAndGetLabelsAndTypes
(ParameterDescriptionNode.h:213)
==31968== by 0x40C7674:
edm::ParameterSetDescription::addNode(std::unique_ptr<edm::ParameterDescriptionNode,
std::default_delete<edm::ParameterDescriptionNode> >, bool, bool)
(ParameterSetDescription.cc:92)
==31968== by 0x8705657: add<int, char [16]> (ParameterSetDescription.h:422)
==31968== by 0x8705657: addUntracked<int, char [16]>
(ParameterSetDescription.h:95)
==31968== by 0x8705657:
edmtest::ProducerWithPSetDesc::fillDescriptions(edm::ConfigurationDescriptions&)
(ProducerWithPSetDesc.cc:459)
==31968== by 0x871ABBB:
edm::ParameterSetDescriptionFiller<edmtest::ProducerWithPSetDesc>::fill(edm::ConfigurationDescriptions&)
const (ParameterSetDescriptionFiller.h:55)
==31968== by 0x4059BF: operator() (edmWriteConfigs.cpp:90)
==31968== by 0x4059BF: wrap<(anonymous namespace)::writeCfisForPlugin(const
string&, edm::ParameterSetDescriptionFillerPluginFactory*)::<lambda()> >
(ConvertException.h:20)
==31968== by 0x4059BF: writeCfisForPlugin (edmWriteConfigs.cpp:91)
==31968== by 0x4059BF: __call<void, std::basic_string<char,
std::char_traits<char>, std::allocator<char> >&, 0ul, 1ul> (functional:943)
==31968== by 0x4059BF: operator()<std::basic_string<char,
std::char_traits<char>, std::allocator<char> >&> (functional:1002)
==31968== by 0x4059BF:
for_each<__gnu_cxx::__normal_iterator<std::basic_string<char>*,
std::vector<std::basic_string<char> > >, std::_Bind<void
(*(std::_Placeholder<1>,
edmplugin::PluginFactory<edm::ParameterSetDescriptionFillerBase*()>*))(const
std::basic_string<cha
r>&, edmplugin::PluginFactory<edm::ParameterSetDescriptionFillerBase*()>*)> >
(stl_algo.h:3776)
==31968== by 0x4059BF: for_all<std::vector<std::basic_string<char> >,
std::_Bind<void (*(std::_Placeholder<1>,
edmplugin::PluginFactory<edm::ParameterSetDescriptionFillerBase*()>*))(const
std::basic_string<char>&, edmplugin::PluginFactory<edm::ParameterSetDescription
FillerBase*()>*)> > (Algorithms.h:17)
==31968== by 0x4059BF: operator() (edmWriteConfigs.cpp:285)
==31968== by 0x4059BF: wrap<main(int, char**)::<lambda()> >
(ConvertException.h:20)
==31968== by 0x4059BF: main (edmWriteConfigs.cpp:286)
==31968== Uninitialised value was created by a stack allocation
==31968== at 0x8705544:
edmtest::ProducerWithPSetDesc::fillDescriptions(edm::ConfigurationDescriptions&)
(ProducerWithPSetDesc.cc:438)
==31968==
==31968== Invalid read of size 8
==31968== at 0x40C7674: checkAndGetLabelsAndTypes
(ParameterDescriptionNode.h:213)
==31968== by 0x40C7674:
edm::ParameterSetDescription::addNode(std::unique_ptr<edm::ParameterDescriptionNode,
std::default_delete<edm::ParameterDescriptionNode> >, bool, bool)
(ParameterSetDescription.cc:92)
==31968== by 0x8705657: add<int, char [16]> (ParameterSetDescription.h:422)
==31968== by 0x8705657: addUntracked<int, char [16]>
(ParameterSetDescription.h:95)
==31968== by 0x8705657:
edmtest::ProducerWithPSetDesc::fillDescriptions(edm::ConfigurationDescriptions&)
(ProducerWithPSetDesc.cc:459)
==31968== by 0x871ABBB:
edm::ParameterSetDescriptionFiller<edmtest::ProducerWithPSetDesc>::fill(edm::ConfigurationDescriptions&)
const (ParameterSetDescriptionFiller.h:55)
==31968== by 0x4059BF: operator() (edmWriteConfigs.cpp:90)
==31968== by 0x4059BF: wrap<(anonymous namespace)::writeCfisForPlugin(const
string&, edm::ParameterSetDescriptionFillerPluginFactory*)::<lambda()> >
(ConvertException.h:20)
==31968== by 0x4059BF: writeCfisForPlugin (edmWriteConfigs.cpp:91)
==31968== by 0x4059BF: __call<void, std::basic_string<char,
std::char_traits<char>, std::allocator<char> >&, 0ul, 1ul> (functional:943)
==31968== by 0x4059BF: operator()<std::basic_string<char,
std::char_traits<char>, std::allocator<char> >&> (functional:1002)
==31968== by 0x4059BF:
for_each<__gnu_cxx::__normal_iterator<std::basic_string<char>*,
std::vector<std::basic_string<char> > >, std::_Bind<void
(*(std::_Placeholder<1>,
edmplugin::PluginFactory<edm::ParameterSetDescriptionFillerBase*()>*))(const
std::basic_string<cha
r>&, edmplugin::PluginFactory<edm::ParameterSetDescriptionFillerBase*()>*)> >
(stl_algo.h:3776)
==31968== by 0x4059BF: for_all<std::vector<std::basic_string<char> >,
std::_Bind<void (*(std::_Placeholder<1>,
edmplugin::PluginFactory<edm::ParameterSetDescriptionFillerBase*()>*))(const
std::basic_string<char>&, edmplugin::PluginFactory<edm::ParameterSetDescription
FillerBase*()>*)> > (Algorithms.h:17)
==31968== by 0x4059BF: operator() (edmWriteConfigs.cpp:285)
==31968== by 0x4059BF: wrap<main(int, char**)::<lambda()> >
(ConvertException.h:20)
==31968== by 0x4059BF: main (edmWriteConfigs.cpp:286)
==31968== Address 0x1ffdfeb5400000 is not stack'd, malloc'd or (recently)
free'd
>From gcc-bugs-return-522964-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 22 07:12:22 2016
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Subject: [Bug ipa/68331] [meta-bug] fipa-pta issues
Date: Fri, 22 Apr 2016 07:12:00 -0000
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--- Comment #13 from David Abdurachmanov <david.abdurachmanov at gmail dot com> ---
Done,
See: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70760
>From gcc-bugs-return-522965-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 22 07:32:18 2016
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Subject: [Bug c++/67650] undef reference with -fdevirtualize
Date: Fri, 22 Apr 2016 07:32:00 -0000
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Jonathan Briggs <zlynx at acm dot org> changed:
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----------------------------------------------------------------------------
CC| |zlynx at acm dot org
--- Comment #12 from Jonathan Briggs <zlynx at acm dot org> ---
This looks incredibly similar to a bug I found this week compiling my code with
GCC 6.0.
My code was much more complex, which has made it really difficult to write a
small reproducer, but I also have a virtual function that is overriding an
abstract base class. The implementation function is defined inline and is part
of a template class. In code compiled with O2 or O3 the function call and all
following code simply disappears from the assembly.
>From gcc-bugs-return-522966-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 22 08:51:22 2016
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Subject: [Bug ipa/70760] [6/7 regression] wrong generated code for std::make_unique with -fipa-pta
Date: Fri, 22 Apr 2016 08:51:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
CC| |rguenth at gcc dot gnu.org
Target Milestone|--- |6.0
Summary|[6 regression] wrong |[6/7 regression] wrong
|generated code for |generated code for
|std::make_unique with |std::make_unique with
|-fipa-pta |-fipa-pta
>From gcc-bugs-return-522967-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 22 08:52:51 2016
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Subject: [Bug ipa/70760] [6/7 regression] wrong generated code for std::make_unique with -fipa-pta
Date: Fri, 22 Apr 2016 08:52:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2016-04-22
Assignee|unassigned 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> ---
I will investigate.
>From gcc-bugs-return-522968-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 22 08:58:40 2016
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Subject: [Bug tree-optimization/70754] [5/6/7 Regression] ICE during predictive commoning
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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> ---
Works fine on x86_64, confirmed with a cross.
#1 0x0000000000f7f058 in initialize_root_vars (loop=0x7ffff69c7140,
chain=0x1f56ff0, tmp_vars=0x1fe14a0)
at /space/rguenther/src/svn/trunk3/gcc/tree-predcom.c:1452
1452 gcc_assert (n > 0 || !reuse_first);
(gdb) p n
$1 = 0
>From gcc-bugs-return-522969-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 22 08:59:26 2016
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Subject: [Bug tree-optimization/70725] Internal compiler error (ICE) on valid code
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #14 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-522970-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 22 09:14:12 2016
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Subject: [Bug sanitizer/70624] [6/7 Regression] Several hundred asan failures with 6.0 on x86_64-apple-darwin10.8
Date: Fri, 22 Apr 2016 09:14:00 -0000
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--- Comment #12 from Maxim Ostapenko <m.ostapenko at samsung dot com> ---
Should be fixed on trunk and gcc-6-branch. Older branches don't need the patch,
because they don't contain 'dyldVersionNumber' in libsanitizer.
>From gcc-bugs-return-522971-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 22 09:23:08 2016
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Subject: [Bug sanitizer/70624] [6/7 Regression] Several hundred asan failures with 6.0 on x86_64-apple-darwin10.8
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
Status|NEW |RESOLVED
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--- Comment #13 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Should be fixed on trunk and gcc-6-branch. Older branches don't need
> the patch, because they don't contain 'dyldVersionNumber' in libsanitizer.
Confirmed, thanks.
>From gcc-bugs-return-522972-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 22 10:10:19 2016
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Subject: [Bug c++/70761] New: C++ ICE on ppc64le and ppc64 with -m64
Date: Fri, 22 Apr 2016 10:10:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70761
Bug ID: 70761
Summary: C++ ICE on ppc64le and ppc64 with -m64
Product: gcc
Version: 5.3.1
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: markos at freevec dot org
Target Milestone: ---
Target: ppc64le, ppc64
Created attachment 38326
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38326&action=edit
Reduced testcase for ICE on ppc64/ppc64le
On ppc64le (Debian testing, g++ 5.3.1-14)
$ g++-5 -O2 testcase.cpp
testcase.cpp: In function ‘void x36()’:
testcase.cpp:150:1: error: unable to generate reloads for:
}
^
(jump_insn 10 5 11 2 (parallel [
(set (pc)
(if_then_else (eq (reg:DI 3 3)
(const_int 1 [0x1]))
(label_ref:DI 20)
(pc)))
(set (reg:DI 63 31 [orig:157 D.3107 ] [157])
(plus:DI (reg:DI 3 3)
(const_int -1 [0xffffffffffffffff])))
(clobber (scratch:CC))
(clobber (scratch:DI))
]) testcase.cpp:132 794 {*ctrdi_internal5}
(expr_list:REG_DEAD (reg:DI 3 3)
(int_list:REG_BR_PROB 4877 (nil)))
-> 20)
testcase.cpp:150:1: internal compiler error: in find_reloads, at reload.c:3862
0x102c425b _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
../../src/gcc/rtl-error.c:110
0x109dcd8f find_reloads(rtx_insn*, int, int, int, short*)
../../src/gcc/reload.c:3862
0x109f03a3 calculate_needs_all_insns
../../src/gcc/reload1.c:1540
0x109f03a3 reload(rtx_insn*, int)
../../src/gcc/reload1.c:1028
0x10903027 do_reload
../../src/gcc/ira.c:5454
0x10903027 execute
../../src/gcc/ira.c:5613
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <file:///usr/share/doc/gcc-5/README.Bugs> for instructions.
On powerpc32 (Debian testing, g++ 5.3.1-14, only when -m64 is added)
$ g++-5 -m64 -O2 testcase.cpp
testcase.cpp: In function ‘void x36()’:
testcase.cpp:150:1: error: unable to generate reloads for:
}
^
(jump_insn 10 5 11 2 (parallel [
(set (pc)
(if_then_else (eq (reg:DI 3 3)
(const_int 1 [0x1]))
(label_ref:DI 20)
(pc)))
(set (reg:DI 63 31 [orig:157 D.3085 ] [157])
(plus:DI (reg:DI 3 3)
(const_int -1 [0xffffffffffffffff])))
(clobber (scratch:CC))
(clobber (scratch:DI))
]) testcase.cpp:132 794 {*ctrdi_internal5}
(expr_list:REG_DEAD (reg:DI 3 3)
(int_list:REG_BR_PROB 4877 (nil)))
-> 20)
testcase.cpp:150:1: internal compiler error: in find_reloads, at reload.c:3862
0x1027c933 _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
../../src/gcc/rtl-error.c:110
0x108ecbf7 find_reloads(rtx_insn*, int, int, int, short*)
../../src/gcc/reload.c:3862
0x108feefb calculate_needs_all_insns
../../src/gcc/reload1.c:1540
0x108feefb reload(rtx_insn*, int)
../../src/gcc/reload1.c:1028
0x1082d9db do_reload
../../src/gcc/ira.c:5454
0x1082d9db execute
../../src/gcc/ira.c:5613
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <file:///usr/share/doc/gcc-5/README.Bugs> for instructions.
Reduced testcase attached, same for both architectures
>From gcc-bugs-return-522973-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 22 10:13:47 2016
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/70762] New: FAIL: experimental/filesystem/operations/copy.cc execution test on x86_64-apple-darwin1*
Date: Fri, 22 Apr 2016 10:13:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70762
Bug ID: 70762
Summary: FAIL: experimental/filesystem/operations/copy.cc
execution test on x86_64-apple-darwin1*
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: dominiq at lps dot ens.fr
CC: iains at gcc dot gnu.org, redi at gcc dot gnu.org
Target Milestone: ---
The test experimental/filesystem/operations/copy.cc fails on darwin with
Assertion failed: (!ec), function test02, file
/opt/gcc/work/libstdc++-v3/testsuite/experimental/filesystem/operations/copy.cc,
line 72.
>From gcc-bugs-return-522974-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 22 10:27:16 2016
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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++/70744] preincrements possibly double-evaluated in GNU ternaries
Date: Fri, 22 Apr 2016 10:27:00 -0000
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--- Comment #6 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
You're right. Of course - in C++, ++i and --i are considered lvalues, while
i++ and i-- are not.
>From gcc-bugs-return-522976-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 22 10:32:58 2016
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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/70712] False positive from AddressSanitizer with use of 'alignas'
Date: Fri, 22 Apr 2016 10:32:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-22
Ever confirmed|0 |1
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Untested fix:
--- gcc/cfgexpand.c.jj 2016-04-20 03:35:44.000000000 +0200
+++ gcc/cfgexpand.c 2016-04-22 12:22:15.036514839 +0200
@@ -1137,7 +1137,7 @@ expand_stack_vars (bool (*pred) (size_t)
HOST_WIDE_INT prev_offset
= align_base (frame_offset,
MAX (alignb, ASAN_RED_ZONE_SIZE),
- FRAME_GROWS_DOWNWARD);
+ !FRAME_GROWS_DOWNWARD);
tree repr_decl = NULL_TREE;
offset
= alloc_stack_frame_space (stack_vars[i].size
>From gcc-bugs-return-522975-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 22 10:32:58 2016
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From: "vincent.lextrait at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/67650] undef reference with -fdevirtualize
Date: Fri, 22 Apr 2016 10:32:00 -0000
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--- Comment #13 from Vincent <vincent.lextrait at gmail dot com> ---
Indeed, that sounds like the same bug.
It took me an entire afternoon shrinking my case down to the code provided in
attachment, it was a needle in a huge haystack. I haven't been able to reduce
the code further. Even tiny changes which seem completely unrelated make the
bug disappear.
It looks very much like a front-end bug.
I am surprised there hasn't been any confirmation of the bug so far, and it has
been resting in bugzilla 7 months so far, only with updates saying it's not a
bug.
>From gcc-bugs-return-522977-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 22 10:54:48 2016
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From: "niva at niisi dot msk.ru" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug preprocessor/16358] -Wno-system-headers hides warning caused by user header vs system header conflict
Date: Fri, 22 Apr 2016 10:54:00 -0000
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niva at niisi dot msk.ru changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |niva at niisi dot msk.ru
--- Comment #9 from niva at niisi dot msk.ru ---
ISO C treats redefinition of a macro as an error (6.10.3 2).
IMHO it is reasonable to add a gcc/cpp option which provides treating
redefinition of a macro as an error.
>From gcc-bugs-return-522978-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 22 11:00:53 2016
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From: "ajmay81 at googlemail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libfortran/70684] [4.9/5/6/7 Regression] incorrect reading of values from file on Windows
Date: Fri, 22 Apr 2016 11:00:00 -0000
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--- Comment #14 from Andy May <ajmay81 at googlemail dot com> ---
(In reply to Jerry DeLisle from comment #13)
> (In reply to Andy May from comment #12)
> > I don't know that it's necessary or desired to support both '\n' and '\r' as
> > eol, but instead the native eol just needs to be used consistently
> > everywhere, for example something like the following pseudo code:
> >
> > #ifdef __MINGW32__
> > #define EOL '\r'
> > #else
> > #define EOL '\n'
> > #endif
> > ...
> > dtp->u.p.at_eol = (c == EOL || c == EOF);
> >
>
> Each compiler may choose to do this a little differently. In our case we
> see /r and look for the /n to eat it. If one is interested in reading a /r
> as data one should use access="stream" which allows you to do what ever you
> want.
>
> I could do something like the above, but it would touch quite a few places
> in the code which opens it up for mistakes and regressions (admittedly
> probably not any more than we get now and we could improve maintainability).
> Our personal time is a factor too. I have bigger bugs to fry and I don't
> get paid to do this. I do it in my spare time for the greater good of all.
> Regardless I do appreciate all input in this process of "open" software. (I
> should further audit the code when I get a chance)
Of course, I really appreciate the work that goes into this. I've already made
a local patch file with your fix so that the mxe.cc gcc builds with it and now
our program runs correctly.
I look after a project with ~2.5 million lines of Fortran, some which were
written 40 years ago on punch cards. Gfortran is the only compiler where I
don't have to play games deoptimizing some files etc. during compilation
(beyond using -fno-aggressive-loop-optimizations), and if I see a problem with
Gfortran compiled code my first instinct is always to look for a bug in our
code rather than the compiler. Thanks once again for your efforts, and please
just let me know if there is anything I can do to help out.
>From gcc-bugs-return-522979-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 22 11:11:40 2016
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/70762] FAIL: experimental/filesystem/operations/copy.cc execution test on x86_64-apple-darwin1*
Date: Fri, 22 Apr 2016 11:11:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70762
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
There's no way I can debug that, someone with an OS X system will have to step
through the code.
The alternative, which is quite tempting, is to just disable the filesystem TS
on darwin ;)
>From gcc-bugs-return-522980-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 22 11:36:55 2016
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From: "schwab@linux-m68k.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ada/70759] Ada rts fails to build with -mabi=ilp32
Date: Fri, 22 Apr 2016 11:36:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70759
--- Comment #1 from Andreas Schwab <schwab@linux-m68k.org> ---
Look like Pmode vs. ptr_mode mixup, probably due to internal_reference_types.
<var_decl 0x3ffb7fa0bd0 ada__assertions__assertion_error
type <reference_type 0x3ffb5bcd350
type <record_type 0x3ffb5a548d8 exception sizes-gimplified asm_written
v
isited BLK
size <integer_cst 0x3ffb5a116c8 constant visited 192>
unit size <integer_cst 0x3ffb5a11698 constant visited 24>
align 32 symtab -1246558336 alias set 10 canonical type
0x3ffb5a548d
8 fields <field_decl 0x3ffb5b00688 not_handled_by_others> context
<translation_u
nit_decl 0x3ffb5b20000 D.27> Ada size <integer_cst 0x3ffb5a116c8 192>
pointer_to_this <pointer_type 0x3ffb5a55c88
ada__assertions__assert_
_T3b> reference_to_this <reference_type 0x3ffb5bcd2a8> chain <type_decl
0x3ffb5b
00f70 exception>>
readonly unsigned SI
size <integer_cst 0x3ffb5a10a68 constant 64>
unit size <integer_cst 0x3ffb5a10a80 constant 8>
align 32 symtab -1246557456 alias set -1 canonical type 0x3ffb5bcd350>
readonly constant asm_written public static visited unsigned decl_1 SI file
a-assert.ads line 55 col 4 size <integer_cst 0x3ffb5a10a68 64> unit size
<integer_cst 0x3ffb5a10a80 8>
align 32 context <translation_unit_decl 0x3ffb5b20000 D.27> initial
<nop_expr 0x3ffb5c0e880>
renamed object <var_decl 0x3ffb7fa0b40 system__assertions__assert_failure
type <record_type 0x3ffb5a548d8 exception>
addressable used public external BLK file s-assert.ads line 43 col 4
size <integer_cst 0x3ffb5a116c8 192> unit size <integer_cst 0x3ffb5a11698 24>
align 32 context <translation_unit_decl 0x3ffb5b20000 D.27>
(mem/c:BLK (symbol_ref:DI ("system__assertions__assert_failure") [flags
0xc0] <var_decl 0x3ffb7fa0b40 system__assertions__assert_failure>) [10
system__assertions__assert_failure+0 S24 A32])>
(mem/u/f/c:SI (symbol_ref:DI ("ada__assertions__assertion_error") [flags
0x80] <var_decl 0x3ffb7fa0bd0 ada__assertions__assertion_error>) [11
ada__assertions__assertion_error+0 S8 A32])>
>From gcc-bugs-return-522981-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 22 11:58:04 2016
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From: "m.ostapenko at samsung dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/70712] False positive from AddressSanitizer with use of 'alignas'
Date: Fri, 22 Apr 2016 11:58:00 -0000
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Maxim Ostapenko <m.ostapenko at samsung dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |m.ostapenko at samsung dot com
--- Comment #3 from Maxim Ostapenko <m.ostapenko at samsung dot com> ---
Another option would be relaxing align value to ASAN_RED_ZONE_SIZE, because
prev_offset should be aligned only by ASAN_RED_ZONE_SIZE due to previous left
redzone.
>From gcc-bugs-return-522982-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 22 12:00:35 2016
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Subject: [Bug c++/70714] ICE: Segmentation fault
Date: Fri, 22 Apr 2016 12:00:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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CC| |mpolacek at gcc dot gnu.org
Resolution|--- |FIXED
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed in r227373. I don't think we'll backport this fix, so closing.
>From gcc-bugs-return-522983-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 22 12:07:01 2016
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Subject: [Bug c++/70691] internal compiler error: Segmentation fault with lambda
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed in
commit 3311d302f541e1988be554fa5385695603131644
Author: jason <jason@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Sun Dec 20 18:38:37 2015 +0000
PR c++/67411
* lambda.c (generic_lambda_fn_p): Split out from...
(maybe_add_lambda_conv_op): ...here.
* semantics.c (process_outer_var_ref): Don't defer maybe-constant
variables in a generic lambda.
* pt.c (instantiate_non_dependent_or_null): New.
* init.c (constant_value_1): Use it.
* cp-tree.h: Declare it and generic_lambda_fn_p.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@231863
138bc75d-0d04-0410-961f-82ee72b054a4
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Subject: gcc gives inccorect value for simple expression
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The following code, when compiled with gcc, it outputs "7".
I have tried it with gcc-4.8.3 and gcc-6.0.1-20160415, both on x86_64
linux, with options
-O0, -g, -O2. All of them gave the same answer.
When compiled with clang, it gives 6.
I know that it is an ill coded program, but I still can't understand why
it outputs 7 when compiled by gcc.
/******************************************/
#include <stdio.h>
int main()
{
int i;
i = 0;
printf("%d\n", (++i) + (++i) + (++i));
return 0;
}
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2015-08-27 23:00 [Bug c++/67376] New: Comparison with pointer to past-the-end of array fails inside constant expression ldionne.2 at gmail dot com
2015-08-29 15:49 ` [Bug c++/67376] " trippels at gcc dot gnu.org
2015-09-04 14:07 ` trippels at gcc dot gnu.org
2015-09-04 14:24 ` trippels at gcc dot gnu.org
2015-09-04 15:06 ` [Bug c++/67376] [5/6 regression] " trippels at gcc dot gnu.org
2015-09-04 15:27 ` trippels at gcc dot gnu.org
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