* [Bug testsuite/40625] [4.9/5/6 Regression] Errors in "make -k check-gcc RUNTESTFLAGS=plugin.exp"
[not found] <bug-40625-4@http.gcc.gnu.org/bugzilla/>
` (9 preceding siblings ...)
2015-06-26 20:36 ` jakub at gcc dot gnu.org
@ 2016-03-30 18:18 ` law at redhat dot com
10 siblings, 0 replies; 11+ messages in thread
From: law at redhat dot com @ 2016-03-30 18:18 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=40625
Jeffrey A. Law <law at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
CC| |law at redhat dot com
Resolution|--- |FIXED
--- Comment #18 from Jeffrey A. Law <law at redhat dot com> ---
The original bug in this report was fixed back in the summer of 2009 almost
immediately after this bug was reported.
THe was a follow-on issue reported (c#11) which was unfortunately tacked onto
this report. I have been unable to reproduce the issue noted in c#11, even if
I go back to the gcc-4.5 branchpoint. While the follow-on issue looks similar,
it would be a distinct problem.
I'm closing as the original issue is resolved and has been for a very long
time. If the secondary issue is still a problem, a new bug should be filed.
>From gcc-bugs-return-520615-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Mar 30 18:28:15 2016
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From: "georg@schorsch-tech.de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70464] [arch64] create a self hosting compiler
Date: Wed, 30 Mar 2016 18:28:00 -0000
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--- Comment #10 from georg@schorsch-tech.de ---
Components to build the "aarch64-to-aarch64" gcc/g++:
-----------------------------------------------------
sha1sum + filename
f10c64e92d9c72ee428df3feaf349c4ecb2493bd binutils-2.25.tar.gz
2dc70313e8e2c6610b856d627bce9c9c3f848077 cloog-0.18.1.tar.gz
39ebff8a873181728b02db3689215557628eed9d gcc-5.3.0.tar.gz
5be95334f197121d8b351059a1c6518305d88e2a glibc-2.22.tar.xz
1aaf78358ab9e34aeb61f3ae08174ee9118ece98 gmp-6.0.0a.tar.xz
c5a2b201bf05229647e73203c0bf2d9679d4d21f isl-0.16.1.tar.bz2
18d8e415f57a1fe4322faec441e45b6d2383b7d1 linux-4.5.tar.xz
5072d82ab50ec36cc8c0e320b5c377adb48abe70 mpc-1.0.2.tar.gz
cedc0055d55b6ee4cd17e1e6119ed412520ff81a mpfr-3.1.4.tar.xz
------------------------------------------------------
Used x86_64-to-aarch64 compiler (created with crossdev 20150716):
----------------------------------------------------------------
georg@hammerhead ~ $ whereis aarch64-none-linux-gnu-gcc
aarch64-none-linux-gnu-gcc: /usr/bin/aarch64-none-linux-gnu-gcc
georg@hammerhead ~ $ file /usr/bin/aarch64-none-linux-gnu-gcc
/usr/bin/aarch64-none-linux-gnu-gcc: ELF 64-bit LSB executable, x86-64, version
1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for
GNU/Linux 2.6.32, stripped
georg@hammerhead ~ $ /usr/bin/aarch64-none-linux-gnu-gcc -v
Using built-in specs.
COLLECT_GCC=/usr/x86_64-pc-linux-gnu/aarch64-none-linux-gnu/gcc-bin/5.3.0/aarch64-none-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/aarch64-none-linux-gnu/5.3.0/lto-wrapper
Target: aarch64-none-linux-gnu
Configured with:
/var/tmp/portage/cross-aarch64-none-linux-gnu/gcc-5.3.0/work/gcc-5.3.0/configure
--host=x86_64-pc-linux-gnu --target=aarch64-none-linux-gnu
--build=x86_64-pc-linux-gnu --prefix=/usr
--bindir=/usr/x86_64-pc-linux-gnu/aarch64-none-linux-gnu/gcc-bin/5.3.0
--includedir=/usr/lib/gcc/aarch64-none-linux-gnu/5.3.0/include
--datadir=/usr/share/gcc-data/aarch64-none-linux-gnu/5.3.0
--mandir=/usr/share/gcc-data/aarch64-none-linux-gnu/5.3.0/man
--infodir=/usr/share/gcc-data/aarch64-none-linux-gnu/5.3.0/info
--with-gxx-include-dir=/usr/lib/gcc/aarch64-none-linux-gnu/5.3.0/include/g++-v5
--with-python-dir=/share/gcc-data/aarch64-none-linux-gnu/5.3.0/python
--enable-languages=c,c++,fortran --enable-obsolete --enable-secureplt
--disable-werror --with-system-zlib --enable-nls --without-included-gettext
--enable-checking=release --with-bugurl=https://bugs.gentoo.org/
--with-pkgversion='Gentoo 5.3.0 p1.0, pie-0.6.5' --enable-libstdcxx-time
--enable-poison-system-directories --with-sysroot=/usr/aarch64-none-linux-gnu
--disable-bootstrap --enable-__cxa_atexit --enable-clocale=gnu
--disable-multilib --disable-altivec --disable-fixed-point --disable-libgcj
--enable-libgomp --disable-libmudflap --disable-libssp --disable-libcilkrts
--enable-lto --without-isl --enable-libsanitizer
Thread model: posix
gcc version 5.3.0 (Gentoo 5.3.0 p1.0, pie-0.6.5)
Configure line for the "aarch64-to-aarch64" gcc:
-------------------------------------------------
../gcc-5.3.0/configure --prefix=/opt/cross --host=aarch64-none-linux-gnu
--target=aarch64-none-linux-gnu --enable-languages=c,c++ --disable-multilib
Error message:
--------------
libtool: compile: aarch64-none-linux-gnu-c++
-B/home/georg/Dokumente/Entwicklung/rpi3/src/gcc/build-gcc/aarch64-none-linux-gnu/libstdc++-v3/src/.libs
-B/home/georg/Dokumente/Entwicklung/rpi3/src/gcc/build-gcc/aarch64-none-linux-gnu/libstdc++-v3/libsupc++/.libs
-DHAVE_CONFIG_H -I. -I../../../gcc-5.3.0/libitm
-I../../../gcc-5.3.0/libitm/config/linux/aarch64
-I../../../gcc-5.3.0/libitm/config/linux
-I../../../gcc-5.3.0/libitm/config/aarch64
-I../../../gcc-5.3.0/libitm/config/posix
-I../../../gcc-5.3.0/libitm/config/generic -I../../../gcc-5.3.0/libitm
-ftls-model=initial-exec -Wall -pthread -Werror -std=gnu++0x -funwind-tables
-fno-exceptions -fno-rtti -fabi-version=4 -g -O2 -D_GNU_SOURCE -MT util.lo -MD
-MP -MF .deps/util.Tpo -c ../../../gcc-5.3.0/libitm/util.cc -fPIC -DPIC -o
.libs/util.o
In file included from /usr/aarch64-none-linux-gnu/usr/include/stdio.h:936:0,
from ../../../gcc-5.3.0/libitm/util.cc:27:
/usr/aarch64-none-linux-gnu/usr/include/bits/stdio2.h: In function 'void
GTM::gtm_verror(const char*, va_list)':
/usr/aarch64-none-linux-gnu/usr/include/bits/stdio2.h:124:1: error: inlining
failed in call to always_inline 'int vfprintf(FILE*, const char*,
__gnuc_va_list)': function body can be overwritten at link time
vfprintf (FILE *__restrict __stream,
^
../../../gcc-5.3.0/libitm/util.cc:35:31: error: called from here
vfprintf (stderr, fmt, list);
^
Makefile:517: recipe for target 'util.lo' failed
As the aarch64-none-linux-gnu-g++ executable got built but the libstdc++3 not,
i copied the "partly done" destination folder to the raspberry pi 3 and here is
the info about aarch64-none-linux-gnu-gcc and aarch64-none-linux-gnu-g++ from
the target:
--------------
Pi_3 64_bit ~ # gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/opt/cross/libexec/gcc/aarch64-none-linux-gnu/5.3.0/lto-wrapper
Target: aarch64-none-linux-gnu
Configured with: ../gcc-5.3.0/configure --prefix=/opt/cross
--host=aarch64-none-linux-gnu --target=aarch64-none-linux-gnu
--enable-languages=c,c++ --disable-multilib
Thread model: posix
gcc version 5.3.0 (GCC)
Pi_3 64_bit ~ # g++ -v
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/opt/cross/libexec/gcc/aarch64-none-linux-gnu/5.3.0/lto-wrapper
Target: aarch64-none-linux-gnu
Configured with: ../gcc-5.3.0/configure --prefix=/opt/cross
--host=aarch64-none-linux-gnu --target=aarch64-none-linux-gnu
--enable-languages=c,c++ --disable-multilib
Thread model: posix
gcc version 5.3.0 (GCC)
Pi_3 64_bit ~ #
>From gcc-bugs-return-520616-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Mar 30 18:30:43 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70464] [arch64] create a self hosting compiler
Date: Wed, 30 Mar 2016 18:30:00 -0000
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--- Comment #11 from Andreas Schwab <schwab@linux-m68k.org> ---
You should use --with-sysroot to configure your cross compiler.
>From gcc-bugs-return-520617-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Mar 30 18:41:36 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++/70466] New: ICE on invalid code on x86_64-linux-gnu in tree check: expected constructor, have parm_decl in convert_like_real, at cp/call.c:6371
Date: Wed, 30 Mar 2016 18:41:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70466
Bug ID: 70466
Summary: ICE on invalid code on x86_64-linux-gnu in tree check:
expected constructor, have parm_decl in
convert_like_real, at cp/call.c:6371
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 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 20160330 (experimental) [trunk revision 234546] (GCC)
$
$ g++-trunk small.cpp
small.cpp:1:21: error: conflicting declaration ‘class T’
template < class T, class T >
^~~~~
small.cpp:1:12: note: previous declaration as ‘class T’
template < class T, class T >
^~~~~
small.cpp:5:19: error: expected ‘)’ before ‘::’ token
explicit A (T (S::*f) ()) {}
^~
small.cpp:5:19: error: expected ‘)’ before ‘::’ token
small.cpp:5:18: error: expected ‘;’ at end of member declaration
explicit A (T (S::*f) ()) {}
^
small.cpp:5:21: error: expected id-expression before ‘*’ token
explicit A (T (S::*f) ()) {}
^
small.cpp: In instantiation of ‘A<T, S> foo(T (S::*)()) [with T = void; S =
B]’:
small.cpp:23:15: required from here
small.cpp:11:10: internal compiler error: tree check: expected constructor,
have parm_decl in convert_like_real, at cp/call.c:6371
return A < T, S > (f);
^~~~~~~~~~~~~~
0xfe3e6c tree_check_failed(tree_node const*, char const*, int, char const*,
...)
../../gcc-source-trunk/gcc/tree.c:9643
0x615e30 tree_check
../../gcc-source-trunk/gcc/tree.h:3006
0x615e30 convert_like_real
../../gcc-source-trunk/gcc/cp/call.c:6371
0x614608 convert_like_real
../../gcc-source-trunk/gcc/cp/call.c:6539
0x61187f build_over_call
../../gcc-source-trunk/gcc/cp/call.c:7496
0x61e035 build_new_method_call_1
../../gcc-source-trunk/gcc/cp/call.c:8419
0x61e035 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
0x61efd5 build_special_member_call(tree_node*, tree_node*, vec<tree_node*,
va_gc, vl_embed>**, tree_node*, int, int)
../../gcc-source-trunk/gcc/cp/call.c:8026
0x621a4b perform_direct_initialization_if_possible(tree_node*, tree_node*,
bool, int)
../../gcc-source-trunk/gcc/cp/call.c:9691
0x783797 build_static_cast_1
../../gcc-source-trunk/gcc/cp/typeck.c:6724
0x784a57 cp_build_c_cast(tree_node*, tree_node*, int)
../../gcc-source-trunk/gcc/cp/typeck.c:7423
0x6d248a build_functional_cast(tree_node*, tree_node*, int)
../../gcc-source-trunk/gcc/cp/typeck2.c:2011
0x68c3b3 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
../../gcc-source-trunk/gcc/cp/pt.c:16083
0x67db0f tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../gcc-source-trunk/gcc/cp/pt.c:15802
0x67e18b tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../gcc-source-trunk/gcc/cp/pt.c:15114
0x67f050 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../gcc-source-trunk/gcc/cp/pt.c:15290
0x67b6a8 instantiate_decl(tree_node*, int, bool)
../../gcc-source-trunk/gcc/cp/pt.c:22013
0x6c7a52 instantiate_pending_templates(int)
../../gcc-source-trunk/gcc/cp/pt.c:22132
0x70a3d7 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.
$
---------------------------------------------------------------------------
template < class T, class T > // should be: template < class T, class S >
class A
{
public:
explicit A (T (S::*f) ()) {}
};
template < class T, class S >
A < T, S > foo (T (S::*f) ())
{
return A < T, S > (f);
}
class B
{
public:
void bar () {}
};
int
main ()
{
foo (&B::bar);
return 0;
}
>From gcc-bugs-return-520618-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Mar 30 18:47:53 2016
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Subject: [Bug target/70465] [4.9/5/6 Regression] Poor code for x87 asm
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Jeffrey A. Law <law at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |vmakarov at redhat dot com
--- Comment #1 from Jeffrey A. Law <law at redhat dot com> ---
Duh. Should have realized this early. The offending commit is the
introduction of IRA.
Vlad, if you could take a quick peek it'd be appreciated.
>From gcc-bugs-return-520620-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Mar 30 18:59:52 2016
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Subject: [Bug target/70464] [arch64] create a self hosting compiler
Date: Wed, 30 Mar 2016 18:59:00 -0000
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--- Comment #12 from georg@schorsch-tech.de ---
I purged all temporary build data, added
"--with-sysroot=/opt/aarch64-none-linux-gnu" to the configure line and rebuild
again. The same error.
/usr/aarch64-none-linux-gnu/usr/include/bits/stdio2.h: In function 'void
GTM::gtm_verror(const char*, va_list)':
/usr/aarch64-none-linux-gnu/usr/include/bits/stdio2.h:124:1: error: inlining
failed in call to always_inline 'int vfprintf(FILE*, const char*,
__gnuc_va_list)': function body can be overwritten at link time
vfprintf (FILE *__restrict __stream,
^
../../../gcc-5.3.0/libitm/util.cc:35:31: error: called from here
vfprintf (stderr, fmt, list);
^
Makefile:517: recipe for target 'util.lo' failed
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Subject: [Bug rtl-optimization/70467] New: Useless "and [esp],-1" emitted on AND with uint64_t variable
Date: Wed, 30 Mar 2016 18:59:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70467
Bug ID: 70467
Summary: Useless "and [esp],-1" emitted on AND with uint64_t
variable
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
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Consider the following C code:
#include <string.h>
long double __attribute__((noinline)) test() { return 0; }
long double doStuff()
{
long double value=test();
unsigned long long v;
memcpy(&v,&value,sizeof v);
v&=~(1ull<<63);
memcpy(&value,&v,sizeof v);
return value;
}
int main(){}
I get the following output for duStuff() function when I compile this code with
`gcc -O3 -fomit-frame-pointer -m32`:
doStuff:
sub esp, 28
call test ; OK, I asked to avoid inlining it
fstp TBYTE PTR [esp]
and DWORD PTR [esp], -1 ; DO NOTHING!!!
and DWORD PTR [esp+4], 2147483647 ; Clear highest bit
fld TBYTE PTR [esp]
add esp, 28
ret
The instruction marked with `DO NOTHING!!!` is a no-op here (flags are not
tested) and should have been eliminated.
This useless instruction is generated across generations of GCC starting at
least with 4.4.7 and ending at 6.0.0 20160221 (the snapshot testable at
gcc.godbolt.org).
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From: "vmakarov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/70461] [6 Regression] Performance regression after r234527
Date: Wed, 30 Mar 2016 20:01:00 -0000
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Vladimir Makarov <vmakarov at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |vmakarov at gcc dot gnu.org
--- Comment #1 from Vladimir Makarov <vmakarov at gcc dot gnu.org> ---
(In reply to Alexander Fomin from comment #0)
> Created attachment 38134 [details]
> A reproducer
>
> When trying to compile the attached reproducer with -m32 -O2 -march=core-avx2
> we generate 12 extra instructions (namely spills & fills) for the hot loop
> since r234527.
Thank you for finding this out.
I am confirming that the revision resulted in the code worsening. The problem
is in using a wrong cost (65535) in saving calculations. Such cost is for AREG
in DImode. This cost is defined when the class (AREG) has not enough registers
to hold a value in given mode (DImode).
I hope the patch will be ready today or tomorrow.
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From: "andres.tiraboschi at tallertechnologies dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70201] Dump C++ template instantiations
Date: Wed, 30 Mar 2016 20:19:00 -0000
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--- Comment #4 from Andrés Agustín Tiraboschi <andres.tiraboschi at tallertechnologies dot com> ---
Created attachment 38139
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38139&action=edit
Patch adding new flag in order to dump information about template
instantiations.
Hi,
the attached patch adds a new compilation flag 'ftemplate-instantiations' in
order
to allow dumping debug information for template instantiations.
This flag has 2 possible values: none(by default) and hreadable, that prints
wich
templates instantiations had been made in a human readable way.
This patch was also made in order to add options easily and to interarct with
plugins.
For example in a plugin can be defined a derived class for
template_instantiations_callbacks
implementing _function_instantiation, _class_instantiation,
_using_instantiation
and then using add_template_instantiations_callbacks in order to access
information
about wich template instantiations had been made.
This is an updated version.
Changelog
2016-03-29 Andres Tiraboschi <andres.tiraboschi@tallertechnologies.com>
* gcc/c-family/c.opt (ftemplate-instantiations): New flag.
* gcc/flag-types.h (ti_dump_options): New type.
* gcc/cp/decl2.c (cp_write_global_declarations): Added code to dump
information.
* gcc/cp/cp-tree.h (template_instantiations_callbacks): New type.
(call_template_instantiation_callbacks): Declare.
(add_template_instantiations_callbacks): Likewise.
(clean_up_callbacks): Likewise.
* gcc/cp/pt.c (human_readable_template_instantiations): New type.
(instantiation_callbacks): Declare.
(call_template_instantiation_callback): New function.
(call_template_instantiation_callbacks): Likewise.
(add_template_instantiations_callbacks): Likewise.
(initialize_instantiations_callbacks): Likewise.
(clean_up_callbacks): Likewise.
(init_template_processing): Added code to initialize
instatiation_callbacks.
(register_specialization): Added code to dump information.
* gcc/doc/invoke.texi (ftemplate-instantiations): Added documentation.
Thanks.
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Subject: [Bug c++/70468] New: ICE on valid code on x86_64-linux-gnu in emit_mem_initializers, at cp/init.c:1109
Date: Wed, 30 Mar 2016 20:23:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70468
Bug ID: 70468
Summary: ICE on valid code on x86_64-linux-gnu in
emit_mem_initializers, at cp/init.c:1109
Product: gcc
Version: 6.0
Status: UNCONFIRMED
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Priority: P3
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The following code causes an ICE when compiled with the current GCC trunk (and
4.8.x and later) on x86_64-linux-gnu in both 32-bit and 64-bit modes.
This 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/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 20160330 (experimental) [trunk revision 234546] (GCC)
$
$ g++-4.7 -c small.cpp
$
$ g++-trunk -c small.cpp
small.cpp: In instantiation of ‘A< <template-parameter-1-1> >::A() [with
<template-parameter-1-1> = S]’:
small.cpp:22:3: required from ‘B<T1, T2>& operator<<(B<T1, T2>&, int) [with
T1 = S; T2 = S]’
small.cpp:26:47: required from here
small.cpp:7:21: internal compiler error: in emit_mem_initializers, at
cp/init.c:1109
A () : f0 (), f1 () {}
^
0x79de0f emit_mem_initializers(tree_node*)
../../gcc-source-trunk/gcc/cp/init.c:1109
0x681742 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../gcc-source-trunk/gcc/cp/pt.c:15110
0x67f050 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../gcc-source-trunk/gcc/cp/pt.c:15290
0x67b6a8 instantiate_decl(tree_node*, int, bool)
../../gcc-source-trunk/gcc/cp/pt.c:22013
0x6c7a52 instantiate_pending_templates(int)
../../gcc-source-trunk/gcc/cp/pt.c:22132
0x70a3d7 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 S {};
template < typename = S >
class A
{
public:
A () : f0 (), f1 () {}
private:
typedef A<> f0;
int f1;
};
template < typename = S, typename = S >
class B
{
};
template < typename T1, typename T2 >
B < T1, T2 > &operator<< (B < T1, T2 >&, const int)
{
A<> ();
}
template
B < S, S > &operator<< (B < S, S >&, const int);
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From: "georg@schorsch-tech.de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70464] [arch64] create a self hosting compiler
Date: Wed, 30 Mar 2016 20:24:00 -0000
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--- Comment #13 from georg@schorsch-tech.de ---
Now as i got a c++ compiler but no libstdc++ on the target, i try to use the
gentoo tools to emerge (compile) the complete gcc on the target. Let it run
over night whatever is needed. It is just a straw ....
Any suggestions are welcome to build it. Regardless what i need to rebuild ...
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug testsuite/70469] New: multiple definition error in g++.dg/template/ptrmem30.C
Date: Wed, 30 Mar 2016 20:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70469
Bug ID: 70469
Summary: multiple definition error in
g++.dg/template/ptrmem30.C
Product: gcc
Version: 6.0
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Priority: P3
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Created attachment 38140
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38140&action=edit
preprocessed source
Symbol `read' is declared by libgloss as an I/O primitive. The global variable
`read' in this test case collides with the libgloss definition for some
architectures. Please change to use a different variable name.
$ /scratch/gcc/nightly/install-mips-mti-elf/bin/mips-mti-elf-g++ --save-temps
--verbose /scratch/frs/src/gcc/gcc/testsuite/g++.dg/template/ptrmem30.C
-Tmti32.ld
Using built-in specs.
COLLECT_GCC=/scratch/gcc/nightly/install-mips-mti-elf/bin/mips-mti-elf-g++
COLLECT_LTO_WRAPPER=/scratch/gcc/nightly/install-mips-mti-elf/libexec/gcc/mips-mti-elf/6.0.0/lto-wrapper
Target: mips-mti-elf
Configured with: /scratch/gcc/nightly/src/gcc/configure
--prefix=/scratch/gcc/nightly/install-mips-mti-elf --disable-libssp
--disable-libmudflap --disable-decimal-float --with-mips-plt
--target=mips-mti-elf --with-newlib --with-gnu-as --with-gnu-ld
--enable-languages=c,c++
--with-sysroot=/scratch/gcc/nightly/install-mips-mti-elf/mips-mti-elf
--with-build-sysroot=/scratch/gcc/nightly/install-mips-mti-elf/mips-mti-elf
Thread model: single
gcc version 6.0.0 20160330 (experimental) (GCC)
COLLECT_GCC_OPTIONS='-save-temps' '-v' '-T' 'mti32.ld' '-mplt' '-mips32r2'
'-msynci' '-mabi=32' '-mfpxx' '-EB'
/scratch/gcc/nightly/install-mips-mti-elf/libexec/gcc/mips-mti-elf/6.0.0/cc1plus
-E -quiet -v /scratch/frs/src/gcc/gcc/testsuite/g++.dg/template/ptrmem30.C -meb
-mplt -mips32r2 -msynci -mabi=32 -mfpxx -fpch-preprocess -o ptrmem30.ii
ignoring nonexistent directory
"/scratch/gcc/nightly/install-mips-mti-elf/mips-mti-elf/usr/local/include"
ignoring nonexistent directory
"/scratch/gcc/nightly/install-mips-mti-elf/mips-mti-elf/usr/include"
#include "..." search starts here:
#include <...> search starts here:
/scratch/gcc/nightly/install-mips-mti-elf/lib/gcc/mips-mti-elf/6.0.0/../../../../mips-mti-elf/include/c++/6.0.0
/scratch/gcc/nightly/install-mips-mti-elf/lib/gcc/mips-mti-elf/6.0.0/../../../../mips-mti-elf/include/c++/6.0.0/mips-mti-elf
/scratch/gcc/nightly/install-mips-mti-elf/lib/gcc/mips-mti-elf/6.0.0/../../../../mips-mti-elf/include/c++/6.0.0/backward
/scratch/gcc/nightly/install-mips-mti-elf/lib/gcc/mips-mti-elf/6.0.0/include
/scratch/gcc/nightly/install-mips-mti-elf/lib/gcc/mips-mti-elf/6.0.0/include-fixed
/scratch/gcc/nightly/install-mips-mti-elf/lib/gcc/mips-mti-elf/6.0.0/../../../../mips-mti-elf/include
End of search list.
COLLECT_GCC_OPTIONS='-save-temps' '-v' '-T' 'mti32.ld' '-mplt' '-mips32r2'
'-msynci' '-mabi=32' '-mfpxx' '-EB'
/scratch/gcc/nightly/install-mips-mti-elf/libexec/gcc/mips-mti-elf/6.0.0/cc1plus
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-msynci -mabi=32 -mfpxx -auxbase ptrmem30 -version -o ptrmem30.s
GNU C++14 (GCC) version 6.0.0 20160330 (experimental) (mips-mti-elf)
compiled by GNU C version 4.4.7 20120313 (Red Hat 4.4.7-16), GMP
version 4.3.2, MPFR version 3.0.1, MPC version 0.9, isl version none
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
GNU C++14 (GCC) version 6.0.0 20160330 (experimental) (mips-mti-elf)
compiled by GNU C version 4.4.7 20120313 (Red Hat 4.4.7-16), GMP
version 4.3.2, MPFR version 3.0.1, MPC version 0.9, isl version none
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
Compiler executable checksum: f716effcc40bdfde513b86e098fc32c1
COLLECT_GCC_OPTIONS='-save-temps' '-v' '-T' 'mti32.ld' '-mplt' '-mips32r2'
'-msynci' '-mabi=32' '-mfpxx' '-EB'
/scratch/gcc/nightly/install-mips-mti-elf/lib/gcc/mips-mti-elf/6.0.0/../../../../mips-mti-elf/bin/as
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GNU assembler version 2.26.51 (mips-mti-elf) using BFD version (GNU Binutils)
2.26.51.20160330
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LIBRARY_PATH=/scratch/gcc/nightly/install-mips-mti-elf/lib/gcc/mips-mti-elf/6.0.0/:/scratch/gcc/nightly/install-mips-mti-elf/lib/gcc/mips-mti-elf/6.0.0/../../../../mips-mti-elf/lib/:/scratch/gcc/nightly/install-mips-mti-elf/mips-mti-elf/lib/
COLLECT_GCC_OPTIONS='-save-temps' '-v' '-T' 'mti32.ld' '-mplt' '-mips32r2'
'-msynci' '-mabi=32' '-mfpxx' '-EB'
/scratch/gcc/nightly/install-mips-mti-elf/libexec/gcc/mips-mti-elf/6.0.0/collect2
-plugin
/scratch/gcc/nightly/install-mips-mti-elf/libexec/gcc/mips-mti-elf/6.0.0/liblto_plugin.so
-plugin-opt=/scratch/gcc/nightly/install-mips-mti-elf/libexec/gcc/mips-mti-elf/6.0.0/lto-wrapper
-plugin-opt=-fresolution=ptrmem30.res -plugin-opt=-pass-through=-lgcc
-plugin-opt=-pass-through=-lgcc
--sysroot=/scratch/gcc/nightly/install-mips-mti-elf/mips-mti-elf -EB -mips32r2
-melf32btsmip
/scratch/gcc/nightly/install-mips-mti-elf/lib/gcc/mips-mti-elf/6.0.0/crti.o
/scratch/gcc/nightly/install-mips-mti-elf/lib/gcc/mips-mti-elf/6.0.0/crtbegin.o
-L/scratch/gcc/nightly/install-mips-mti-elf/lib/gcc/mips-mti-elf/6.0.0
-L/scratch/gcc/nightly/install-mips-mti-elf/lib/gcc/mips-mti-elf/6.0.0/../../../../mips-mti-elf/lib
-L/scratch/gcc/nightly/install-mips-mti-elf/mips-mti-elf/lib ptrmem30.o
-lstdc++ -lm -lgcc -lgcc
/scratch/gcc/nightly/install-mips-mti-elf/lib/gcc/mips-mti-elf/6.0.0/crtend.o
/scratch/gcc/nightly/install-mips-mti-elf/lib/gcc/mips-mti-elf/6.0.0/crtn.o -T
mti32.ld
/scratch/gcc/nightly/install-mips-mti-elf/lib/gcc/mips-mti-elf/6.0.0/../../../../mips-mti-elf/lib/libidt.a(idtmon.o):/scratch/gcc/nightly/src/gcc/libgloss/mips/idtmon.S:37:
multiple definition of `read'
ptrmem30.o:(.sbss+0x0): first defined here
collect2: error: ld returned 1 exit status
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Subject: [Bug fortran/70235] [4.9/5/6 Regression] Incorrect output with PF format
Date: Wed, 30 Mar 2016 20:48:00 -0000
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--- Comment #25 from dominiq at gcc dot gnu.org ---
Author: dominiq
Date: Wed Mar 30 20:47:45 2016
New Revision: 234600
URL: https://gcc.gnu.org/viewcvs?rev=234600&root=gcc&view=rev
Log:
2016-03-30 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.
2016-03-30 Dominique d'Humieres <dominiq@lps.ens.fr>
Jerry DeLisle <jvdelisle@gcc.gnu.org>
* gfortran.dg/fmt_pf.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/fmt_pf.f90
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/libgfortran/ChangeLog
trunk/libgfortran/io/write_float.def
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Subject: [Bug fortran/70235] [4.9/5 Regression] Incorrect output with PF format
Date: Wed, 30 Mar 2016 20:51:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |WAITING
Summary|[4.9/5/6 Regression] |[4.9/5 Regression]
|Incorrect output with PF |Incorrect output with PF
|format |format
--- Comment #26 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Fixed on trunk with r234600.
>From gcc-bugs-return-520628-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Mar 30 20:54:58 2016
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Subject: [Bug target/69890] FAIL: gcc.target/i386/chkp-* on x86_64-apple-darwin15
Date: Wed, 30 Mar 2016 20:54:00 -0000
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--- Comment #5 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Well, tests were not supposed to check object_sizes pass capabilities.
> But allowing misoptimized code means we don't test functionality
> we wanted to test. I think these tests may use __builtin_* versions
> of string functions to make tests independent from headers.
Sorry, but I don't understand what should be done to fix the chkp-stropt-*
tests.
>From gcc-bugs-return-520629-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Mar 30 21:09:05 2016
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Subject: [Bug target/70464] [arch64] create a self hosting compiler
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--- Comment #14 from georg@schorsch-tech.de ---
Is it related to this?
https://gcc.gnu.org/ml/gcc-patches/2013-04/msg00896.html
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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 #1 from vries at gcc dot gnu.org ---
Created attachment 38141
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38141&action=edit
updated test-case
Fails with -O1, passes with -O2.
The problem is that this loop nest:
...
for (zh = 0; zh < 2; ++zh)
for (ro = 0; ro < 3; ++ro)
yu[ro][0] = yu[zh + 1][0];
...
is rewritten into this loop nest, which has different semantics:
...
for (ro = 0; ro < 3; ++ro)
for (zh = 0; zh < 2; ++zh)
yu[ro][0] = yu[zh + 1][0];
...
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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 #2 from vries at gcc dot gnu.org ---
(In reply to vries from comment #1)
> Created attachment 38141 [details]
> updated test-case
>
> Fails with -O1, passes with -O2.
>
> The problem is that this loop nest:
> ...
> for (zh = 0; zh < 2; ++zh)
> for (ro = 0; ro < 3; ++ro)
> yu[ro][0] = yu[zh + 1][0];
> ...
Unrolled, that looks like:
/* yu == { { 1 }, { 2 }, { 3 }, { 4 } }. */
yu[0][0] = yu[1][0]; /* zh == 0, ro == 0. */
/* yu == { { 2 }, { 2 }, { 3 }, { 4 } }. */
yu[1][0] = yu[1][0]; /* zh == 0, ro == 1. */
/* yu == { { 2 }, { 2 }, { 3 }, { 4 } }. */
yu[2][0] = yu[1][0]; /* zh == 0, ro == 2. */
/* yu == { { 2 }, { 2 }, { 2 }, { 4 } }. */
yu[0][0] = yu[2][0]; /* zh == 1, ro == 0. */
/* yu == { { 2 }, { 2 }, { 2 }, { 4 } }. */
yu[1][0] = yu[2][0]; /* zh == 1, ro == 1. */
/* yu == { { 2 }, { 2 }, { 2 }, { 4 } }. */
yu[2][0] = yu[2][0]; /* zh == 1, ro == 2. */
/* yu == { { 2 }, { 2 }, { 2 }, { 4 } }. */
> is rewritten into this loop nest, which has different semantics:
> ...
> for (ro = 0; ro < 3; ++ro)
> for (zh = 0; zh < 2; ++zh)
> yu[ro][0] = yu[zh + 1][0];
> ...
and unrolled, this looks like:
/* yu == { { 1 }, { 2 }, { 3 }, { 4 } }. */
yu[0][0] = yu[1][0]; /* zh == 0, ro == 0. */
/* yu == { { 2 }, { 2 }, { 3 }, { 4 } }. */
yu[0][0] = yu[2][0]; /* zh == 1, ro == 0. */
/* yu == { { 3 }, { 2 }, { 3 }, { 4 } }. */
yu[1][0] = yu[1][0]; /* zh == 0, ro == 1. */
/* yu == { { 3 }, { 2 }, { 3 }, { 4 } }. */
yu[1][0] = yu[2][0]; /* zh == 1, ro == 1. */
/* yu == { { 3 }, { 3 }, { 3 }, { 4 } }. */
yu[2][0] = yu[1][0]; /* zh == 0, ro == 2. */
/* yu == { { 3 }, { 3 }, { 3 }, { 4 } }. */
yu[2][0] = yu[2][0]; /* zh == 1, ro == 2. */
/* yu == { { 3 }, { 3 }, { 3 }, { 4 } }. */
>From gcc-bugs-return-520632-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Mar 30 21:43:58 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/58646] ICE on a multidimensional VLA with a constant bound and empty initializer list
Date: Wed, 30 Mar 2016 21:43:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|ICEs initializing VLAs |ICE on a multidimensional
| |VLA with a constant bound
| |and empty initializer list
--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
Updating Summary to make it clear that the ICE depends on the VLA having
multiple dimensions at least one of which being a constant expression, and the
initializer list being empty.
>From gcc-bugs-return-520633-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Mar 30 21:45:43 2016
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Subject: [Bug rtl-optimization/55943] [4.9/5/6 Regression] ICE in gen_reg_rtx
Date: Wed, 30 Mar 2016 21:45:00 -0000
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Jeffrey A. Law <law at redhat dot com> changed:
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----------------------------------------------------------------------------
Status|NEW |RESOLVED
CC| |law at redhat dot com
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--- Comment #14 from Jeffrey A. Law <law at redhat dot com> ---
This was fixed in 4.9, but tagged with its duplicate BZ (56382).
>From gcc-bugs-return-520634-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Mar 30 22:31:24 2016
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/58646] ICE on a multidimensional VLA with an empty initializer list
Date: Wed, 30 Mar 2016 22:31:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|ICE on a multidimensional |ICE on a multidimensional
|VLA with a constant bound |VLA with an empty
|and empty initializer list |initializer list
--- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
Actually, the ICE can be triggered even by a multidimensional VLA with no
constant bounds, like this one:
void f (int n)
{
int a [n][n] = {{}};
}
>From gcc-bugs-return-520635-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Mar 30 22:55:48 2016
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Subject: [Bug c++/70470] New: std::min uninitialized value
Date: Wed, 30 Mar 2016 22:55:00 -0000
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Bug ID: 70470
Summary: std::min uninitialized value
Product: gcc
Version: 5.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: shaun.endres at numerica dot us
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Summary:
The following code incorrectly compute the value of x and will yield a warning
about an uninitialized variable:
const double &x = std::min(std::abs(1.0), 2.0);
if (x != 1) { std::cout << "Incorrect Result!" << std::endl; }
This will give a warning of:
warning: ‘<anonymous>’ is used uninitialized in this function [-Wuninitialized]
And will incorrectly compute the value of x to be zero, which will print
"Incorrect Result!" to the screen.
However, if you store the result in a double instead of a const double &, then
the result is computed correctly and no warning is given. Additionally,
breaking up the std::min and std::abs into two statements will also make the
problem disappear.
***********
Details:
g++ --version => g++ (GCC) 5.3.0
uname -r => 2.6.32-573.12.1.el6.x86_64
Full Source:
#include <cmath>
#include <algorithm>
#include <iostream>
int main()
{
double x = 1.0;
double y = 2.0;
double xx = std::abs(x);
const double& z1 = std::min(xx, y);
const double& z2 = std::min(std::abs(x), y);
double z3 = std::min(xx, y);
double z4 = std::min(std::abs(x), y);
std::cout << "z1: " << z1 << std::endl;
std::cout << "z2: " << z2 << std::endl;
std::cout << "z3: " << z3 << std::endl;
std::cout << "z4: " << z4 << std::endl;
if ( z1 != 1 ) std::cerr << "Incorrect z1: " << z1 << " != 1" << std::endl;
if ( z2 != 1 ) std::cerr << "Incorrect z2: " << z2 << " != 1" << std::endl;
if ( z3 != 1 ) std::cerr << "Incorrect z3: " << z3 << " != 1" << std::endl;
if ( z4 != 1 ) std::cerr << "Incorrect z4: " << z4 << " != 1" << std::endl;
return 0;
}
Compiling:
g++ -o test_min -Wall -O2 test_min.cpp
Compilation Output:
test_min.cpp: In function ‘int main()’:
test_min.cpp:23:3: warning: ‘<anonymous>’ is used uninitialized in this
function [-Wuninitialized]
if ( z2 != 1 ) std::cerr << "Incorrect z2: " << z2 << " != 1" << std::endl;
^
Execution Output:
z1: 1
z2: 0
z3: 1
z4: 1
Incorrect z2: 0 != 1
Notes:
I also tried this on gcc 4.4 and that did not seem to have the same issue.
If you remove the -O2 flag from the compilation command, then the issue goes
away. (Adding -O1 and -O3 will also cause the issue.)
>From gcc-bugs-return-520636-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Mar 30 23:55:33 2016
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Subject: [Bug c++/64977] constexpr variable initialization by reference in lambda rejected
Date: Wed, 30 Mar 2016 23:55:00 -0000
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--- Comment #2 from ytj000 at gmail dot com ---
(In reply to Martin Sebor from comment #1)
> I'm not 100% sure this example is valid. It seems to me that the rejected
> initializer "e" is invalid because it's not
> a core constant expression. I.e., it's a capture by reference, which is "an
> id-expression that refers to a variable or data member of reference type
> [that] has a preceding initialization" but the reference isn't "initialized
> with a constant expression" (a is not a constant expression). Is there
> something I'm missing?
I think you are right. The following code shows clang has inconsistent
behavior.
struct A {
constexpr operator int() const { return 0; }
};
int main() {
A a;
[&a]() { constexpr int b = a; }; // clang accepted
A &ra = a;
constexpr int b = ra; // clang rejected
}
>From gcc-bugs-return-520637-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 00:15:58 2016
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Subject: [Bug other/56811] [4.9/5/6 Regression] libbacktrace causes undefined symbol "_Unwind_GetIPInfo" on ia64-hpux
Date: Thu, 31 Mar 2016 00:15:00 -0000
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Jeffrey A. Law <law at redhat dot com> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |law at redhat dot com
Resolution|--- |FIXED
--- Comment #17 from Jeffrey A. Law <law at redhat dot com> ---
These issues were fixed long ago (gcc-4.8.3) and those fixes are included in
gcc-4.9 and beyond. c#12 confirms this problem was fixed in gcc-4.8.3.
>From gcc-bugs-return-520638-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 00:17:52 2016
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Subject: [Bug other/56811] [4.9/5/6 Regression] libbacktrace causes undefined symbol "_Unwind_GetIPInfo" on ia64-hpux
Date: Thu, 31 Mar 2016 00:17:00 -0000
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----------------------------------------------------------------------------
CC| |ossman at cendio dot se
--- Comment #18 from Jeffrey A. Law <law at redhat dot com> ---
*** Bug 47609 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-520639-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 00:17:52 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/47609] libstdc++ depends on libgcc_s.10.5 but gets linked to libgcc_s.10.4
Date: Thu, 31 Mar 2016 00:17:00 -0000
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Jeffrey A. Law <law at redhat dot com> changed:
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----------------------------------------------------------------------------
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CC| |law at redhat dot com
Resolution|--- |DUPLICATE
--- Comment #1 from Jeffrey A. Law <law at redhat dot com> ---
Duplicate of 56811 and others.
*** This bug has been marked as a duplicate of bug 56811 ***
>From gcc-bugs-return-520640-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 01:04:01 2016
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From: "hongxu.jia at windriver dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug other/70428] -fdebug-prefix-map did not support to remap sources with relative path
Date: Thu, 31 Mar 2016 01:04:00 -0000
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hongxu jia <hongxu.jia at windriver dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from hongxu jia <hongxu.jia at windriver dot com> ---
(In reply to joseph@codesourcery.com from comment #3)
> On Wed, 30 Mar 2016, hongxu.jia at windriver dot com wrote:
>
> > Do you mean the combination of using *"relative path" source to compile*
> > and *"absolute path" in -fdebug-prefix-map to remap* is not proper?
>
> It's perfectly proper. But the absolute path passed to -fdebug-prefix-map
> must be the actual pwd of the build or an absolute path passed to the
> compiler, or a prefix of one of those. It must not be some canonicalized
> version that was never seen by the compiler and combines fragments of
> paths handled differently by the compiler. I don't think the compiler
> ever does anything with a path such as /folk/hjia/test1/test2, or ever
> interprets what "../../" means in the path to source files. You need to
> pass /folk/hjia/dir1/dir2 or a prefix thereof to -fdebug-prefix-map in
> your example, and the resulting debug info will still contain references
> to ../../test1/test2/test.c (so you need to make sure that the remapped
> path is one relative to which ../../test1/test2/test.c is valid, on the
> system where the debug info is interpreted).
Ok, thanks to point it out
>From gcc-bugs-return-520641-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 01:29:17 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++/70470] std::min uninitialized value
Date: Thu, 31 Mar 2016 01:29:00 -0000
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Patrick Palka <ppalka at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |ppalka at gcc dot gnu.org
--- Comment #1 from Patrick Palka <ppalka at gcc dot gnu.org> ---
Reduced:
const int& foo (const int& x) { return x; }
int
main ()
{
int x = 1;
const int& y = foo (x+1);
return y != 2;
}
>From gcc-bugs-return-520642-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 01:52:52 2016
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From: "carlos at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/66830] Problem with C++ unique symbols in plugins
Date: Thu, 31 Mar 2016 01:52:00 -0000
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Carlos O'Donell <carlos at redhat dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Carlos O'Donell <carlos at redhat dot com> ---
(In reply to pleuba from comment #3)
> Is this problem/behavior referenced or documented somewhere? I did not find
> any explanation on the internet.
>
> It take me some time to understand it, and if we can avoid others to spend
> this time too.
>
> Are they any plans to fix this or disable unique symbols by default ?
The dynamic loader could mark all users of an STB_GNU_UNIQUE symbol as
RTLD_NODELETE. It seems like the only answer.
That would mean you can't unload any of your plugins, and would make using C++
for dynamic plugin work very difficult. A long-running process could never
change these plugins. The author of the plugins would have to understand
intimate ABI details to write unloadable plugins or use another language that
doesn't have these problems.
>From gcc-bugs-return-520643-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 02:58:15 2016
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From: "schnetter at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/70471] New: Superfluous move instructions in floating-point instruction sequence
Date: Thu, 31 Mar 2016 02:58:00 -0000
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Bug ID: 70471
Summary: Superfluous move instructions in floating-point
instruction sequence
Product: gcc
Version: 5.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: schnetter at gmail dot com
Target Milestone: ---
In a function consisting of a long chain of floating-point operations, GCC
5.3.0 on Darwin 15.4.0 targeting an "Intel(R) Core(TM) i7-4980HQ CPU @ 2.80GHz"
with options
-march=native
-Ofast
-fopenmp
generates this sequence (line 6302 ff):
vmovapd %ymm4, %ymm8
vmovapd %ymm4, -10192(%rbp)
vsubpd %ymm1, %ymm8, %ymm0
vmovapd -4496(%rbp), %ymm8
Am I right with my interpretation that the first vmovapd is strictly
superfluous? The register %ymm8 is set on the first line, is overwritten on the
last line, and is used only once in the third line, where the original value
%ymm4 is still available.
Additional comments:
This is not the only place where inspection by eye indicates superfluous move
instructions; these seem to occur in many places. As you see below, both the
input and the generated code are quite long. Most relevant for performance is
likely the cache footprint. Thus, superfluous instructions are worrisome.
Details:
$ uname -a
Darwin Redshift 15.4.0 Darwin Kernel Version 15.4.0: Fri Feb 26 22:08:05 PST
2016; root:xnu-3248.40.184~3/RELEASE_X86_64 x86_64
$
/Users/eschnett/src/spack/opt/spack/darwin-x86_64/gcc-4.2.1/gcc-5.3.0-j3ujojmhirf6t2mi5enfosb6545duy42/bin/g++
-v
Reading specs from
/Users/eschnett/src/spack/opt/spack/darwin-x86_64/gcc-4.2.1/gcc-5.3.0-j3ujojmhirf6t2mi5enfosb6545duy42/lib64/gcc/x86_64-apple-darwin15.4.0/5.3.0/specs
COLLECT_GCC=/Users/eschnett/src/spack/opt/spack/darwin-x86_64/gcc-4.2.1/gcc-5.3.0-j3ujojmhirf6t2mi5enfosb6545duy42/bin/g++
COLLECT_LTO_WRAPPER=/Users/eschnett/src/spack/opt/spack/darwin-x86_64/gcc-4.2.1/gcc-5.3.0-j3ujojmhirf6t2mi5enfosb6545duy42/libexec/gcc/x86_64-apple-darwin15.4.0/5.3.0/lto-wrapper
Target: x86_64-apple-darwin15.4.0
Configured with:
/Users/eschnett/src/spack/var/spack/stage/gcc-5.3.0-j3ujojmhirf6t2mi5enfosb6545duy42/gcc-5.3.0/configure
--prefix=/Users/eschnett/src/spack/opt/spack/darwin-x86_64/gcc-4.2.1/gcc-5.3.0-j3ujojmhirf6t2mi5enfosb6545duy42
--libdir=/Users/eschnett/src/spack/opt/spack/darwin-x86_64/gcc-4.2.1/gcc-5.3.0-j3ujojmhirf6t2mi5enfosb6545duy42/lib64
--disable-multilib --enable-languages=fortran,c,java,objc,c++
--with-mpc=/Users/eschnett/src/spack/opt/spack/darwin-x86_64/gcc-4.2.1/mpc-1.0.3-kg7pswhyszxa6vbgohqjhy2pywb76gpc
--with-mpfr=/Users/eschnett/src/spack/opt/spack/darwin-x86_64/gcc-4.2.1/mpfr-3.1.4-taib2hirt72ggnirqb2brytc4cvp2igf
--with-gmp=/Users/eschnett/src/spack/opt/spack/darwin-x86_64/gcc-4.2.1/gmp-6.1.0-ld7rtqn2neg3z47mzg2vnexqeet4pz3i
--enable-lto --with-quad
--with-isl=/Users/eschnett/src/spack/opt/spack/darwin-x86_64/gcc-4.2.1/isl-0.14-cn4dbzoocjsf2a5jwamnhnverh2hwccr
Thread model: posix
gcc version 5.3.0 (GCC)
Compiled with:
$
/Users/eschnett/src/spack/opt/spack/darwin-x86_64/gcc-4.2.1/gcc-5.3.0-j3ujojmhirf6t2mi5enfosb6545duy42/bin/g++
-fopenmp -march=native -std=gnu++11 -Ofast -S
ML_BSSN_FD4_EvolutionInterior.cc.i
Pre-processed input "ML_BSSN_FD4_EvolutionInterior.cc.i" (3.5 MByte):
https://gist.github.com/eschnett/10bf0b2b1977348f3e15ae29db871bb0
Compiler output "ML_BSSN_FD4_EvolutionInterior.cc.s" (470 kByte):
https://gist.github.com/eschnett/79d31fe08e9588d28763a9ad5c77ccfa
>From gcc-bugs-return-520645-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 04:27:30 2016
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Subject: [Bug libstdc++/70459] regex segfault on long sequences
Date: Thu, 31 Mar 2016 04:27:00 -0000
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Tim Shen <timshen at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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CC| |timshen at gcc dot gnu.org
Resolution|--- |DUPLICATE
--- Comment #2 from Tim Shen <timshen at gcc dot gnu.org> ---
This is a known issue. I plan to fix it, but it's not going to be in GCC 6.
Thanks for reporting!
*** This bug has been marked as a duplicate of bug 61582 ***
>From gcc-bugs-return-520644-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 04:27:30 2016
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Subject: [Bug libstdc++/61582] C++11 regex memory corruption
Date: Thu, 31 Mar 2016 04:27:00 -0000
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Tim Shen <timshen at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |chaoskeeper at mail dot ru
--- Comment #19 from Tim Shen <timshen at gcc dot gnu.org> ---
*** Bug 70459 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-520646-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 05:06:26 2016
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Subject: [Bug c++/70470] std::min uninitialized value
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70470
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> ---
In
const double& z2 = std::min(std::abs(x), y);
you IMHO bind the reference to a temporary that goes out of the scope at the
end of the statement, so any uses of z2 beyond that trigger undefined behavior.
>From gcc-bugs-return-520647-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 06:25:34 2016
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Subject: [Bug target/68973] [6 regression] Internal compiler error on power for gcc/testsuite/g++.dg/pr67211.C
Date: Thu, 31 Mar 2016 06:25:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68973
--- Comment #21 from Alan Modra <amodra at gcc dot gnu.org> ---
Author: amodra
Date: Thu Mar 31 06:24:40 2016
New Revision: 234608
URL: https://gcc.gnu.org/viewcvs?rev=234608&root=gcc&view=rev
Log:
[RS6000] reload_vsx_from_gprsf splitter
This is PR68973 part 2, caused by the reload_vsx_from_gprsf splitter
emitting an invalid move. Part 1 deferred for branch until it is
proven that the reload change is necessary.
Backport from mainline
2016-02-16 Alan Modra <amodra@gmail.com>
PR target/68973
* config/rs6000/rs6000.md (reload_vsx_from_gprsf): Rewrite splitter.
(p8_mtvsrd_df, p8_mtvsrd_sf): New.
(p8_mtvsrd_1, p8_mtvsrd_2): Delete.
(p8_mtvsrwz): New.
(p8_mtvsrwz_1, p8_mtvsrwz_2): Delete.
(p8_xxpermdi_<mode>): Take two DF inputs rather than one TF.
(p8_fmrgow_<mode>): Likewise.
(reload_vsx_from_gpr<mode>): Adjust for above. Use "wa" for
clobber constraint.
(reload_fpr_from_gpr<mode>): Adjust for above. Use "d" for
op0 constraint.
(reload_vsx_from_gprsf): Use p8_mtvsrd_sf rather than attempting
to use movdi_internal64. Remove op0_di.
* config/rs6000/vsx.md (vsx_xscvspdpn_directmove): Make op1 SFmode.
Modified:
branches/gcc-5-branch/gcc/ChangeLog
branches/gcc-5-branch/gcc/config/rs6000/rs6000.md
branches/gcc-5-branch/gcc/config/rs6000/vsx.md
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/68973] [6 regression] Internal compiler error on power for gcc/testsuite/g++.dg/pr67211.C
Date: Thu, 31 Mar 2016 06:26:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68973
--- Comment #22 from Alan Modra <amodra at gcc dot gnu.org> ---
Author: amodra
Date: Thu Mar 31 06:26:02 2016
New Revision: 234609
URL: https://gcc.gnu.org/viewcvs?rev=234609&root=gcc&view=rev
Log:
[RS6000] reload_vsx_from_gprsf splitter
This is PR68973 part 2, caused by the reload_vsx_from_gprsf splitter
emitting an invalid move. Part 1 deferred for branch until it is
proven that the reload change is necessary.
Backport from mainline
2016-02-16 Alan Modra <amodra@gmail.com>
PR target/68973
* config/rs6000/rs6000.md (reload_vsx_from_gprsf): Rewrite splitter.
(p8_mtvsrd_df, p8_mtvsrd_sf): New.
(p8_mtvsrd_1, p8_mtvsrd_2): Delete.
(p8_mtvsrwz): New.
(p8_mtvsrwz_1, p8_mtvsrwz_2): Delete.
(p8_xxpermdi_<mode>): Take two DF inputs rather than one TF.
(p8_fmrgow_<mode>): Likewise.
(reload_vsx_from_gpr<mode>): Adjust for above. Use "wa" for
clobber constraint.
(reload_fpr_from_gpr<mode>): Adjust for above. Use "d" for
op0 constraint.
(reload_vsx_from_gprsf): Use p8_mtvsrd_sf rather than attempting
to use movdi_internal64. Remove op0_di.
* config/rs6000/vsx.md (vsx_xscvspdpn_directmove): Make op1 SFmode.
Modified:
branches/gcc-4_9-branch/gcc/ChangeLog
branches/gcc-4_9-branch/gcc/config/rs6000/rs6000.md
branches/gcc-4_9-branch/gcc/config/rs6000/vsx.md
>From gcc-bugs-return-520649-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 07:07:15 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] New: is_copy_constructible<vector<unique_ptr<int>>>::value is true
Date: Thu, 31 Mar 2016 07:07:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70472
Bug ID: 70472
Summary: is_copy_constructible<vector<unique_ptr<int>>>::value
is true
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: safinaskar at mail dot ru
Target Milestone: ---
Consider this code:
#include <type_traits>
#include <vector>
#include <memory>
#include <iostream>
int
main (void)
{
std::cout <<
std::is_copy_constructible<std::vector<std::unique_ptr<int>>>::value << "\n";
}
It gives 1. But, of course, it should give 0, because the following code
doesn't compile:
#include <vector>
#include <memory>
int
main (void)
{
typedef std::vector<std::unique_ptr<int>> v;
v a;
v b = a;
}
I think this problem is solvable. For example, it is solved for
std::exprimental::optional in gcc 6.0.0's stdlibc++.
std::is_copy_constructible<std::experimental::optional<std::unique_ptr<int>>>::value
is false.
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).
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.
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. 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 .
I use gcc-snapshot Debian package. Package version is 20160320-1. Output of
"/usr/lib/gcc-snapshot/bin/gcc -v":
COLLECT_GCC=/usr/lib/gcc-snapshot/bin/gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc-snapshot/libexec/gcc/x86_64-linux-gnu/6.0.0/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian 20160320-1'
--with-bugurl=file:///usr/share/doc/gcc-snapshot/README.Bugs
--enable-languages=c,ada,c++,java,go,fortran,objc,obj-c++
--prefix=/usr/lib/gcc-snapshot --enable-shared --enable-linker-build-id
--disable-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-6-snap-amd64/jre
--enable-java-home --with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-6-snap-amd64
--with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-6-snap-amd64
--with-arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar
--enable-objc-gc --enable-multiarch --with-arch-32=i586 --with-abi=m64
--with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic
--disable-werror --enable-checking=yes --build=x86_64-linux-gnu
--host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 6.0.0 20160320 (experimental) [trunk revision 234355] (Debian
20160320-1)
I use stdlibc++ shipped with this gcc.
>From gcc-bugs-return-520650-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 07:12:00 2016
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From: "awiouy at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/70473] New: genautomata memory footprint for arm
Date: Thu, 31 Mar 2016 07:12:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70473
Bug ID: 70473
Summary: genautomata memory footprint for arm
Product: gcc
Version: 5.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
Assignee: unassigned at gcc dot gnu.org
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Hello,
bootstrapping/crosscompiling gcc 5.3.0 for arm (Raspberry Pi 2 and 3),
genautomata uses a lot of memory. This causes swapping/thrashing and extremely
long build times on low memory systems.
Similar to bug 60743, which requests that a new bug is filed.
Thank you for your attention, and regards,
@
>From gcc-bugs-return-520651-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 07:31:08 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 bootstrap/70473] genautomata memory footprint for arm
Date: Thu, 31 Mar 2016 07:31:00 -0000
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ktkachov at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |build, memory-hog
Target| |arm*
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-03-31
CC| |ktkachov at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from ktkachov at gcc dot gnu.org ---
Confirmed. Unfortunately reducing the size of the automata requires changes in
the processor scheduling models and so needs a lot of benchmarking to make sure
generated code performance does not regress.
I'm working on some patches, but they are planned for GCC 7
>From gcc-bugs-return-520652-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 07:40:58 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: Thu, 31 Mar 2016 07:40:00 -0000
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--- Comment #1 from Askar Safin <safinaskar at mail dot ru> ---
Also, this code doesn't compile: http://paste.debian.net/422907/ and I think
this is related to this bug. If I decomment noexcept line, it compiles
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Subject: [Bug target/70421] [5/6 Regression] wrong code with v16si vector and useless cast at -O -mavx512f
Date: Thu, 31 Mar 2016 07:49:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-520654-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 08:01:46 2016
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Subject: [Bug c++/70470] std::min uninitialized value
Date: Thu, 31 Mar 2016 08:01:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Yep.
>From gcc-bugs-return-520655-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 08:03:42 2016
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Subject: [Bug testsuite/70469] multiple definition error in g++.dg/template/ptrmem30.C
Date: Thu, 31 Mar 2016 08:03:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
GCC does not host libgloss.
>From gcc-bugs-return-520656-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 08:06:24 2016
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Subject: [Bug c++/70468] [4.9/5/6 Regression] ICE on valid code on x86_64-linux-gnu in emit_mem_initializers, at cp/init.c:1109
Date: Thu, 31 Mar 2016 08:06:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
Status|UNCONFIRMED |NEW
Known to work| |4.6.4
Keywords| |ice-on-invalid-code
Last reconfirmed| |2016-03-31
Ever confirmed|0 |1
Summary|ICE on valid code on |[4.9/5/6 Regression] ICE on
|x86_64-linux-gnu in |valid code on
|emit_mem_initializers, at |x86_64-linux-gnu in
|cp/init.c:1109 |emit_mem_initializers, at
| |cp/init.c:1109
Target Milestone|--- |4.9.4
Known to fail| |4.7.3, 4.8.5, 4.9.3, 5.3.0,
| |6.0
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed but invalid code:
> /space/rguenther/install/gcc-4.6.4/bin/g++ t.C -S
t.C: In constructor ‘A< <template-parameter-1-1> >::A() [with
<template-parameter-1-1> = S]’:
t.C:22:5: instantiated from ‘B<T1, T2>& operator<<(B<T1, T2>&, int) [with T1
= S, T2 = S]’
t.C:26:47: instantiated from here
t.C:7:25: error: type ‘A<>’ is not a direct base of ‘A<>’
>From gcc-bugs-return-520657-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 08:10:24 2016
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Subject: [Bug rtl-optimization/70467] Useless "and [esp],-1" emitted on AND with uint64_t variable
Date: Thu, 31 Mar 2016 08:10:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Target| |i?86-*-*
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-03-31
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
can't reproduce with sth simpler. But confirmed, with plain -O2 -m32.
Probably
to do with splitting wide types (or not doing that in this case).
>From gcc-bugs-return-520658-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 08:11:16 2016
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Subject: [Bug rtl-optimization/70467] Useless "and [esp],-1" emitted on AND with uint64_t variable
Date: Thu, 31 Mar 2016 08:11:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Known to work| |6.0
Resolution|--- |FIXED
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed in GCC 6 btw:
doStuff:
.LFB15:
.cfi_startproc
subl $28, %esp
.cfi_def_cfa_offset 32
call test
fstpt (%esp)
andl $2147483647, 4(%esp)
fldt (%esp)
addl $28, %esp
.cfi_def_cfa_offset 4
ret
>From gcc-bugs-return-520659-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 08:14:22 2016
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Subject: [Bug c++/70466] ICE on invalid code on x86_64-linux-gnu in tree check: expected constructor, have parm_decl in convert_like_real, at cp/call.c:6371 with -std=c++11
Date: Thu, 31 Mar 2016 08:14:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-invalid-code
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-03-31
Summary|ICE on invalid code on |ICE on invalid code on
|x86_64-linux-gnu in tree |x86_64-linux-gnu in tree
|check: expected |check: expected
|constructor, have parm_decl |constructor, have parm_decl
|in convert_like_real, at |in convert_like_real, at
|cp/call.c:6371 |cp/call.c:6371 with
| |-std=c++11
Ever confirmed|0 |1
Known to fail| |4.3.4, 5.3.0, 6.0
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed with -std=gnu++14 (doesn't ICE with -std=gnu++98 which is default in
GCC 5). ICEs the same with GCC 4.8 (and -std=gnu++1y) or GCC 4.7 or GCC 4.3(!)
and -std=gnu++0x.
So not really a regression.
>From gcc-bugs-return-520660-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 08:18:25 2016
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Subject: [Bug target/70465] [4.9/5/6/7 Regression] Poor code for x87 asm
Date: Thu, 31 Mar 2016 08:18:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Target| |i?86-*-*
Target Milestone|6.0 |7.0
Summary|[4.9/5/6 Regression] Poor |[4.9/5/6/7 Regression]
|code for x87 asm |Poor code for x87 asm
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Whatever we do, please defer to GCC 7. (who cares about x87 math these days?)
I wonder why __builtin_atan2 doesn't expand to fpatan with fancy-math-387 and
-ffast-math.
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Subject: [Bug c++/70462] Unnecessary "base object constructor" for final classes
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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CC| |jason at gcc dot gnu.org
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Maybe the ABI mandates these nevertheless.
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Subject: [Bug rtl-optimization/70461] [6 Regression] Performance regression after r234527
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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> ---
Thus confirmed.
>From gcc-bugs-return-520663-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 08:23:09 2016
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Subject: [Bug rtl-optimization/70460] [4.9/5/6 Regression] Miscompilation of glibc on i686-linux starting with r234101
Date: Thu, 31 Mar 2016 08:23:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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>From gcc-bugs-return-520664-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 08:31:35 2016
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Subject: [Bug target/70465] [4.9/5/6/7 Regression] Poor code for x87 asm
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--- Comment #3 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Richard Biener from comment #2)
> I wonder why __builtin_atan2 doesn't expand to fpatan with fancy-math-387 and
> -ffast-math.
It does. You also have to use -mfpmath=387 if your compiler defaults to SSE
math.
>From gcc-bugs-return-520665-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 08:35:38 2016
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Subject: [Bug rtl-optimization/70471] Superfluous move instructions in floating-point instruction sequence
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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> ---
Please provide the compiler command plus output when -v appended so we can see
what -march=native expands to for you.
As there are a load of spills in this code the extra move is likely a remanent
of a late removed spill.
It looks like you are talking about the function
_ZN11ML_BSSN_FD4L34ML_BSSN_FD4_EvolutionInterior_BodyEPK4_cGHiiPKdS4_S4_PKiS6_iPrKPd._omp_fn.0
created from ML_BSSN_FD4::ML_BSSN_FD4_EvolutionInterior_Body.
Confirmed there are a load of spills in the code, couldn't find the specific
sequence with using -march=core-avx2 (but I'm also not running on darwin
which will make assembler look differently).
Looks like GCC 6 spills a lot less here.
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Subject: [Bug bootstrap/70473] genautomata memory footprint for arm
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
I suppose that for specific cases like building a compiler for/on raspi one
could disable all but the "interesting" automaton?
>From gcc-bugs-return-520667-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 08:39:09 2016
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Subject: [Bug target/70404] pr70174.c fails on s390x
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2016-03-31
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 38142
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38142&action=edit
gcc6-pr70404.patch
Untested fix.
>From gcc-bugs-return-520668-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 08:41:23 2016
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Subject: [Bug bootstrap/70473] genautomata memory footprint for arm
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--- Comment #3 from ktkachov at gcc dot gnu.org ---
(In reply to Richard Biener from comment #2)
> I suppose that for specific cases like building a compiler for/on raspi one
> could disable all but the "interesting" automaton?
I don't think genautomata supports such functionality currently (i.e. disable
particular automata)
>From gcc-bugs-return-520669-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 08:42:39 2016
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Subject: [Bug target/69614] [4.9/5 Regression] wrong code with -Os -fno-expensive-optimizations -fschedule-insns -mtpcs-leaf-frame -fira-algorithm=priority @ armv7a
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Richard Earnshaw <rearnsha at gcc dot gnu.org> changed:
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Subject: [Bug c++/70468] [4.9/5/6 Regression] ICE on valid code on x86_64-linux-gnu in emit_mem_initializers, at cp/init.c:1109
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org,
| |jason at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r182012:
.../cc1plus.182011 -quiet -std=c++98 pr70468.C
pr70468.C: In instantiation of ‘A< <template-parameter-1-1> >::A() [with
<template-parameter-1-1> = S]’:
pr70468.C:22:3: required from ‘B<T1, T2>& operator<<(B<T1, T2>&, int) [with
T1 = S; T2 = S]’
pr70468.C:26:47: required from here
pr70468.C:7:21: error: type ‘A<>’ is not a direct base of ‘A<>’
.../cc1plus.182012 -quiet -std=c++98 pr70468.C
pr70468.C: In instantiation of ‘A< <template-parameter-1-1> >::A() [with
<template-parameter-1-1> = S]’:
pr70468.C:22:3: required from ‘B<T1, T2>& operator<<(B<T1, T2>&, int) [with
T1 = S; T2 = S]’
pr70468.C:26:47: required from here
pr70468.C:7:21: internal compiler error: in emit_mem_initializers, at
cp/init.c:1020
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
>From gcc-bugs-return-520671-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 08:49:56 2016
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Subject: [Bug c++/70430] Incorrect result for logical "and" operation with mixed vector and scalar
Date: Thu, 31 Mar 2016 08:49:00 -0000
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Mar 31 08:49:09 2016
New Revision: 234611
URL: https://gcc.gnu.org/viewcvs?rev=234611&root=gcc&view=rev
Log:
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:
trunk/gcc/testsuite/g++.dg/ext/vector30.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/typeck.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-520672-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 08:58:20 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/70474] New: [4.9 Regression] Several hundred asan failures with 4.9.4 on x86_64-apple-darwin15
Date: Thu, 31 Mar 2016 08:58:00 -0000
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Bug ID: 70474
Summary: [4.9 Regression] Several hundred asan failures with
4.9.4 on x86_64-apple-darwin15
Product: gcc
Version: 4.9.4
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,
fxcoudert 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,
m.ostapenko at samsung dot com
Target Milestone: ---
Host: x86_64-apple-darwin15
Target: x86_64-apple-darwin15
Build: x86_64-apple-darwin15
On x86_64-apple-darwin15 (Xcode 7.3) I get several hundred asan failures with
4.9.4 (see https://gcc.gnu.org/ml/gcc-testresults/2016-03/msg03029.html). They
are of the kind
==62978==AddressSanitizer CHECK failed:
../../../../4.9_work/libsanitizer/asan/asan_rtl.cc:441 "((!asan_init_is_running
&& "ASan init calls itself!")) != (0)" (0x0, 0x0)
<empty stack>
This is very similar to pr69147 for the gcc-5 branch.
>From gcc-bugs-return-520673-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 09:05:56 2016
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Subject: [Bug c/70475] New: -Wmisleading-indentation quetionable in Eigen
Date: Thu, 31 Mar 2016 09:05:00 -0000
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Bug ID: 70475
Summary: -Wmisleading-indentation quetionable in Eigen
Product: gcc
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In Eigen (http://eigen.tuxfamily.org/index.php?title=Main_Page),
this construct is used to group things:
----------------
void do_stuff();
void do_other_stuff();
int main() {
bool a = false;
do_other_stuff();
if (a) do_stuff();
do_other_stuff();
};
-------------
Should -Wmisleading-indentation really warn on this?
To me it is pretty clear that the conditional only
apply to the one line.
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Subject: [Bug c++/70476] New: C++11: Function name declared in unnamed namespace extern "C" gets exernal linkage
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Bug ID: 70476
Summary: C++11: Function name declared in unnamed namespace
extern "C" gets exernal linkage
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My reading of the C++11-and-beyond Standard is that the name of a function with
extern "C" language linkage declared in an unnamed namespace should have
internal linkage: Per [basic.link], it has the same linkage as the enclosing
unnamed namespace (i.e., internal). And [dcl.link]'s "A declaration directly
contained in a linkage-specification is treated as if it contains the extern
specifier..." is irrelevant, as even a function declared with the "extern"
storage specifier in an unnamed namespace has internal linkage. (See also
<https://groups.google.com/a/isocpp.org/forum/#!topic/std-discussion/oyLCkCUKpfU>
"Linkage of: namespace { extern "C" { void f() {} } }".)
That is, with test.cc being
void external01() {}
extern void external02() {}
static void internal03() {}
extern "C" void external04() {}
extern "C" { void external05() {} }
extern "C" { extern void external06() {} }
extern "C" { static void internal07() {} }
namespace { void internal08() {} }
namespace { extern void internal09() {} }
namespace { static void internal10() {} }
namespace { extern "C" void internal11() {} }
namespace { extern "C" { void internal12() {} } }
namespace { extern "C" { extern void internal13() {} } }
namespace { extern "C" { static void internal14() {} } }
all external* should have external linkage and all internal* should have
internal linkage when compiled as C++11 or later.
But (at least on Linux with recent GCC trunk)
> $ gcc/trunk/inst/bin/g++ --version
> g++ (GCC) 6.0.0 20160331 (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/trunk/inst/bin/g++ -std=c++11 -c test.cc && nm test.o | grep -w T
> 0000000000000015 T external04
> 000000000000001c T external05
> 0000000000000023 T external06
> 0000000000000046 T internal11
> 000000000000004d T internal12
> 0000000000000054 T internal13
> 0000000000000000 T _Z10external01v
> 0000000000000007 T _Z10external02v
shows that internal11--13 erroneously get external linkage.
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Subject: [Bug c/70475] -Wmisleading-indentation quetionable in Eigen
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
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CC| |trippels at gcc dot gnu.org
--- Comment #1 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
See discussion in PR69415.
>From gcc-bugs-return-520676-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 09:21:48 2016
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Subject: [Bug c/70475] -Wmisleading-indentation quetionable in Eigen
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--- Comment #2 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
(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.
>From gcc-bugs-return-520677-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 09:26:25 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/70474] [4.9 Regression] Several hundred asan failures with 4.9.4 on x86_64-apple-darwin15
Date: Thu, 31 Mar 2016 09:26:00 -0000
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--- 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?
>From gcc-bugs-return-520678-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 09:37:47 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 sanitizer/70474] [4.9 Regression] Several hundred asan failures with 4.9.4 on x86_64-apple-darwin15
Date: Thu, 31 Mar 2016 09:37:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |4.9.4
>From gcc-bugs-return-520679-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 09:40:37 2016
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Subject: [Bug c++/70430] Incorrect result for logical "and" operation with mixed vector and scalar
Date: Thu, 31 Mar 2016 09:40:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |6.0
Target Milestone|--- |5.4
Known to fail| |5.3.0
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed on trunk sofar, queued for GCC 5.
>From gcc-bugs-return-520680-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 09:44:09 2016
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Subject: [Bug target/70404] pr70174.c fails on s390x
Date: Thu, 31 Mar 2016 09:44:00 -0000
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--- Comment #3 from Dominik Vogt <vogt at linux dot vnet.ibm.com> ---
Andreas is already working on the issue, so before anybody spends any more work
on this, you should probably coordinate your efforts.
>From gcc-bugs-return-520681-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 10:10:43 2016
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Subject: [Bug rtl-optimization/70467] Useless "and [esp],-1" emitted on AND with uint64_t variable
Date: Thu, 31 Mar 2016 10:10:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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CC| |jakub at gcc dot gnu.org
Resolution|FIXED |---
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
It is not fixed, try
-m32 -O2 -mno-sse.
I believe the issue is that we expand_binop DImode
op0 == target
(mem/c:DI (plus:SI (reg/f:SI 82 virtual-stack-vars)
(const_int -16 [0xfffffffffffffff0])) [0 MEM[(char *
{ref-all})&value]+0 S8 A128])
and op1
(const_int 9223372036854775807 [0x7fffffffffffffff])
which then expands this per subwords as two SImode expand_binops, but nothing
there is able to optimize & -1 (and similarly | or ^ 0, or & 0, or | -1).
And, combiner doesn't do anything, because it is a single insn that operates on
memory, so there is nothing to combine together.
So, IMHO expand_binop just should handle the easy cases. I'll prepare a patch.
>From gcc-bugs-return-520682-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 10:28:00 2016
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Subject: [Bug tree-optimization/23471] a*a (for signed ints with -fno-wrapv) is always postive
Date: Thu, 31 Mar 2016 10:28:00 -0000
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--- Comment #3 from Marc Glisse <glisse at gcc dot gnu.org> ---
The case a*a has been handled for a while, both in fold-const.c
(tree_binary_nonnegative_warnv_p) and in VRP. However, the case a*a*a*a*a*a is
not handled. In the .optimized dump at -O3, we still have:
b_3 = a_2(D) * a_2(D);
b_4 = a_2(D) * b_3;
b_5 = a_2(D) * b_4;
b_6 = a_2(D) * b_5;
b_7 = a_2(D) * b_6;
If reassoc or some similar pass had turned it into the following, the
optimization would probably work:
b_3 = a_2(D) * a_2(D);
b_4 = a_2(D) * b_3;
b_7 = b_4 * b_4;
Not sure how often this would be useful though.
>From gcc-bugs-return-520683-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 10:28:23 2016
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Subject: [Bug target/69890] FAIL: gcc.target/i386/chkp-* on x86_64-apple-darwin15
Date: Thu, 31 Mar 2016 10:28:00 -0000
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--- Comment #6 from Ilya Enkovich <ienkovich at gcc dot gnu.org> ---
(In reply to Dominique d'Humieres from comment #5)
> Sorry, but I don't understand what should be done to fix the chkp-stropt-*
> tests.
Basically all external dependencies just should be removed. There is
gcc.dg/strlenopt.h which is used for a similar purpose by strlenopt-* tests.
It can be re-used/copied for chkp-stropt-* tests to replace string.h.
>From gcc-bugs-return-520684-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 10:38:19 2016
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Subject: [Bug rtl-optimization/70467] Useless "and [esp],-1" emitted on AND with uint64_t variable
Date: Thu, 31 Mar 2016 10:38:00 -0000
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--- Comment #4 from Ruslan <b7.10110111 at gmail dot com> ---
(In reply to Jakub Jelinek from comment #3)
> ...
> nothing there is able to optimize & -1 (and similarly | or ^ 0, or & 0, or |
> -1).
Just a note: the same happens for arithmetic operations, not just bitwise. E.g.
if you change `v&=~(1ull<<63)` in the OP to `v+=1ull<<32`, GCC generates `add
dword [esp],0` followed by `adc dword [esp+4],1`.
>From gcc-bugs-return-520685-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 10:48:18 2016
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Subject: [Bug c/70477] New: -Wtautological-compare too aggressive?
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Bug ID: 70477
Summary: -Wtautological-compare too aggressive?
Product: gcc
Version: 6.0
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I'm trying to perform an aarch64-none-linux-gnu bootstrap with -save-temps in
the BOOT_CFLAGS but I'm getting a -Wtautological-compare failure when compiling
c-family/c-pragma.c:
gcc/c-family/c-pragma.c:415:64: warning: self-comparison always evaluates to
false [-Wtautological-compare]
if (BYTES_BIG_ENDIAN != WORDS_BIG_ENDIAN)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ^
For aarch64 these are defined as:
#define BYTES_BIG_ENDIAN (TARGET_BIG_END != 0)
#define WORDS_BIG_ENDIAN (BYTES_BIG_ENDIAN)
I think this can be reproduced also as:
int var;
#define A var
#define B var
int foo (int a, int b)
{
if (A == B)
return a;
else
return b;
}
gcc -Wtautological-compare -c warn.c
warn.c: In function 'foo':
warn.c:8:9: warning: self-comparison always evaluates to true
[-Wtautological-compare]
if (A == B)
^~
Should we be warning on these things if they come from a macro expansion?
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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: Thu, 31 Mar 2016 10:57:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-03-31
Ever confirmed|0 |1
--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Created attachment 38143 [details]
> Proposed patch.
>
> Does this patch fix the problem?
From preliminary tests, yes. Thanks for the prompt answer.
>From gcc-bugs-return-520687-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 11:11:18 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/70467] Useless "and [esp],-1" emitted on AND with uint64_t variable
Date: Thu, 31 Mar 2016 11:11:00 -0000
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
For the logicals, e.g. the following works:
--- gcc/optabs.c.jj 2016-02-16 16:15:17.000000000 +0100
+++ gcc/optabs.c 2016-03-31 12:53:37.571337401 +0200
@@ -1136,6 +1136,37 @@ expand_binop (machine_mode mode, optab b
op1 = force_reg (GET_MODE_INNER (mode), op1);
}
+ /* Optimize some bitwise operations; these can be not optimized
+ away by GIMPLE optimizations when expanding wider bitwise operations
+ a word at a time. */
+
+ if (optimize)
+ {
+ if (binoptab == and_optab)
+ {
+ if (op1 == CONST0_RTX (mode) && ! side_effects_p (op0))
+ return op1;
+ if (INTEGRAL_MODE_P (mode) && op1 == CONSTM1_RTX (mode))
+ return op0;
+ }
+ if (binoptab == ior_optab)
+ {
+ if (op1 == CONST0_RTX (mode))
+ return op0;
+ if (INTEGRAL_MODE_P (mode)
+ && op1 == CONSTM1_RTX (mode)
+ && ! side_effects_p (op0))
+ return op1;
+ }
+ if (binoptab == xor_optab)
+ {
+ if (op1 == CONST0_RTX (mode))
+ return op0;
+ if (INTEGRAL_MODE_P (mode) && op1 == CONSTM1_RTX (mode))
+ return expand_unop (mode, one_cmpl_optab, op0, target, 0);
+ }
+ }
+
/* Record where to delete back to if we backtrack. */
last = get_last_insn ();
Tested on
void foo (unsigned long long *);
void
bar (void)
{
unsigned long long a;
foo (&a);
a &= 0x7fffffffffffffffULL;
foo (&a);
a &= 0xffffffff7fffffffULL;
foo (&a);
a &= 0x7fffffff00000000ULL;
foo (&a);
a &= 0x000000007fffffffULL;
foo (&a);
a &= 0x00000000ffffffffULL;
foo (&a);
a &= 0xffffffff00000000ULL;
foo (&a);
a |= 0x7fffffffffffffffULL;
foo (&a);
a |= 0xffffffff7fffffffULL;
foo (&a);
a |= 0x7fffffff00000000ULL;
foo (&a);
a |= 0x000000007fffffffULL;
foo (&a);
a |= 0x00000000ffffffffULL;
foo (&a);
a |= 0xffffffff00000000ULL;
foo (&a);
a ^= 0x7fffffffffffffffULL;
foo (&a);
a ^= 0xffffffff7fffffffULL;
foo (&a);
a ^= 0x7fffffff00000000ULL;
foo (&a);
a ^= 0x000000007fffffffULL;
foo (&a);
a ^= 0x00000000ffffffffULL;
foo (&a);
a ^= 0xffffffff00000000ULL;
foo (&a);
}
Though, apparently CSE1 is able to optimize some of these (& 0, | -1, ^ -1),
but not the others.
So another option is to handle & -1, | 0 and ^ 0 in CSE.
>From gcc-bugs-return-520688-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 11:18:32 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/70478] New: [LRA] S/390: Performance regression - superfluous stack frame
Date: Thu, 31 Mar 2016 11:18:00 -0000
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Bug ID: 70478
Summary: [LRA] S/390: Performance regression - superfluous
stack frame
Product: gcc
Version: 6.0
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Priority: P3
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void foo(unsigned int *a, unsigned char *b)
{
*a &= *b;
}
cc1 -O3 -march=z9-109 t.c -mno-lra
foo:
llc %r1,0(%r3)
n %r1,0(%r2)
st %r1,0(%r2)
br %r14
cc1 -O3 -march=z9-109 t.c
foo:
stg %r15,120(%r15)
lay %r15,-168(%r15)
llc %r1,0(%r3)
st %r1,164(%r15)
nc 0(4,%r2),164(%r15)
lg %r15,288(%r15)
br %r14
Problem is present since r199754 which enabled LRA on S/390.
>From gcc-bugs-return-520689-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 11:21:22 2016
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Subject: [Bug tree-optimization/23471] a*a (for signed ints with -fno-wrapv) is always postive
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Marc Glisse from comment #3)
> The case a*a has been handled for a while, both in fold-const.c
> (tree_binary_nonnegative_warnv_p) and in VRP. However, the case a*a*a*a*a*a
> is not handled. In the .optimized dump at -O3, we still have:
>
> b_3 = a_2(D) * a_2(D);
> b_4 = a_2(D) * b_3;
> b_5 = a_2(D) * b_4;
> b_6 = a_2(D) * b_5;
> b_7 = a_2(D) * b_6;
>
> If reassoc or some similar pass had turned it into the following, the
> optimization would probably work:
>
> b_3 = a_2(D) * a_2(D);
> b_4 = a_2(D) * b_3;
> b_7 = b_4 * b_4;
>
> Not sure how often this would be useful though.
Hum, reassoc handles this for floats only it seems (__builtin_powi detection
and expansion). Ah, and of course reassoc does nothing to
TYPE_OVERFLOW_UNDEFINED
ops.
It seems to be reassoc could handle this case anyway as code-gen optimiztion.
>From gcc-bugs-return-520690-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 11:22:21 2016
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Subject: [Bug tree-optimization/23471] a*a (for signed ints with -fno-wrapv) is always postive
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |rguenth at gcc dot gnu.org
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
There is tools in tree-ssa-math-opts.c (powi_as_mults) for this, plus this
"re-association" is valid for all TYPE_OVERFLOW kinds.
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Subject: [Bug rtl-optimization/70467] Useless "and [esp],-1" emitted on AND with uint64_t variable
Date: Thu, 31 Mar 2016 11:24:00 -0000
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--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
I would have expected simplify_rtx to eventually handle all interesting cases.
>From gcc-bugs-return-520692-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 11:46:36 2016
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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:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mpolacek at gcc dot gnu.org
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
I already added
1360 /* Don't warn for various macro expansions. */
1361 if (from_macro_expansion_at (loc)
1362 || from_macro_expansion_at (EXPR_LOCATION (lhs))
1363 || from_macro_expansion_at (EXPR_LOCATION (rhs)))
1364 return;
so it /shouldn't/ be triggering :(.
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Subject: [Bug middle-end/69526] ivopts candidate strangeness
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--- Comment #10 from rdapp at linux dot vnet.ibm.com ---
Created attachment 38144
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38144&action=edit
Tentative patch for VRP and loop-doloop
Meanwhile I found the time to implement a pattern for VRP which seems to do the
job on tree level. Although larger now (and not many cases are covered yet) I
suppose I agree that it fits better in VRP than in ivopts and might even catch
more cases than before.
The fix on RTL level is nonetheless necessary since doloop calculates the
number of iterations independently of the code before and also adds a +1.
I cleaned up the fix a little by introducing niterp1_expr (niter plus 1) but
there's still room for improvement.
No regressions so far, improvement ideas welcome.
>From gcc-bugs-return-520694-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 12:07:53 2016
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From: "schnetter at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/70471] Superfluous move instructions in floating-point instruction sequence
Date: Thu, 31 Mar 2016 12:07:00 -0000
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--- Comment #2 from Erik Schnetter <schnetter at gmail dot com> ---
Compiler invocation with "-v" appended:
$
/Users/eschnett/src/spack/opt/spack/darwin-x86_64/gcc-4.2.1/gcc-5.3.0-j3ujojmhirf6t2mi5enfosb6545duy42/bin/g++
-fopenmp -march=native -std=gnu++11 -Ofast -S
ML_BSSN_FD4_EvolutionInterior.cc.i -v
Reading specs from
/Users/eschnett/src/spack/opt/spack/darwin-x86_64/gcc-4.2.1/gcc-5.3.0-j3ujojmhirf6t2mi5enfosb6545duy42/lib64/gcc/x86_64-apple-darwin15.4.0/5.3.0/specs
COLLECT_GCC=/Users/eschnett/src/spack/opt/spack/darwin-x86_64/gcc-4.2.1/gcc-5.3.0-j3ujojmhirf6t2mi5enfosb6545duy42/bin/g++
Target: x86_64-apple-darwin15.4.0
Configured with:
/Users/eschnett/src/spack/var/spack/stage/gcc-5.3.0-j3ujojmhirf6t2mi5enfosb6545duy42/gcc-5.3.0/configure
--prefix=/Users/eschnett/src/spack/opt/spack/darwin-x86_64/gcc-4.2.1/gcc-5.3.0-j3ujojmhirf6t2mi5enfosb6545duy42
--libdir=/Users/eschnett/src/spack/opt/spack/darwin-x86_64/gcc-4.2.1/gcc-5.3.0-j3ujojmhirf6t2mi5enfosb6545duy42/lib64
--disable-multilib --enable-languages=fortran,c,java,objc,c++
--with-mpc=/Users/eschnett/src/spack/opt/spack/darwin-x86_64/gcc-4.2.1/mpc-1.0.3-kg7pswhyszxa6vbgohqjhy2pywb76gpc
--with-mpfr=/Users/eschnett/src/spack/opt/spack/darwin-x86_64/gcc-4.2.1/mpfr-3.1.4-taib2hirt72ggnirqb2brytc4cvp2igf
--with-gmp=/Users/eschnett/src/spack/opt/spack/darwin-x86_64/gcc-4.2.1/gmp-6.1.0-ld7rtqn2neg3z47mzg2vnexqeet4pz3i
--enable-lto --with-quad
--with-isl=/Users/eschnett/src/spack/opt/spack/darwin-x86_64/gcc-4.2.1/isl-0.14-cn4dbzoocjsf2a5jwamnhnverh2hwccr
Thread model: posix
gcc version 5.3.0 (GCC)
COLLECT_GCC_OPTIONS='-mmacosx-version-min=10.11.4' '-fopenmp' '-march=native'
'-std=gnu++11' '-Ofast' '-S' '-v' '-shared-libgcc'
/Users/eschnett/src/spack/opt/spack/darwin-x86_64/gcc-4.2.1/gcc-5.3.0-j3ujojmhirf6t2mi5enfosb6545duy42/libexec/gcc/x86_64-apple-darwin15.4.0/5.3.0/cc1plus
-fpreprocessed ML_BSSN_FD4_EvolutionInterior.cc.i -march=haswell -mmmx
-mno-3dnow -msse -msse2 -msse3 -mssse3 -mno-sse4a -mcx16 -msahf -mmovbe -maes
-mno-sha -mpclmul -mpopcnt -mabm -mno-lwp -mfma -mno-fma4 -mno-xop -mbmi -mbmi2
-mno-tbm -mavx -mavx2 -msse4.2 -msse4.1 -mlzcnt -mno-rtm -mno-hle -mrdrnd
-mf16c -mfsgsbase -mno-rdseed -mno-prfchw -mno-adx -mfxsr -mxsave -mxsaveopt
-mno-avx512f -mno-avx512er -mno-avx512cd -mno-avx512pf -mno-prefetchwt1
-mno-clflushopt -mno-xsavec -mno-xsaves -mno-avx512dq -mno-avx512bw
-mno-avx512vl -mno-avx512ifma -mno-avx512vbmi -mno-clwb -mno-pcommit
-mno-mwaitx --param l1-cache-size=32 --param l1-cache-line-size=64 --param
l2-cache-size=6144 -mtune=haswell -fPIC -quiet -dumpbase
ML_BSSN_FD4_EvolutionInterior.cc.i -mmacosx-version-min=10.11.4 -auxbase
ML_BSSN_FD4_EvolutionInterior.cc -Ofast -std=gnu++11 -version -fopenmp -o
ML_BSSN_FD4_EvolutionInterior.cc.s
GNU C++11 (GCC) version 5.3.0 (x86_64-apple-darwin15.4.0)
compiled by GNU C version 5.3.0, GMP version 6.1.0, MPFR version 3.1.4,
MPC version 1.0.3
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU C++11 (GCC) version 5.3.0 (x86_64-apple-darwin15.4.0)
compiled by GNU C version 5.3.0, GMP version 6.1.0, MPFR version 3.1.4,
MPC version 1.0.3
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: e534f97573a0a1c1d792b0a47110beef
COMPILER_PATH=/Users/eschnett/src/spack/opt/spack/darwin-x86_64/gcc-4.2.1/gcc-5.3.0-j3ujojmhirf6t2mi5enfosb6545duy42/libexec/gcc/x86_64-apple-darwin15.4.0/5.3.0/:/Users/eschnett/src/spack/opt/spack/darwin-x86_64/gcc-4.2.1/gcc-5.3.0-j3ujojmhirf6t2mi5enfosb6545duy42/libexec/gcc/x86_64-apple-darwin15.4.0/5.3.0/:/Users/eschnett/src/spack/opt/spack/darwin-x86_64/gcc-4.2.1/gcc-5.3.0-j3ujojmhirf6t2mi5enfosb6545duy42/libexec/gcc/x86_64-apple-darwin15.4.0/:/Users/eschnett/src/spack/opt/spack/darwin-x86_64/gcc-4.2.1/gcc-5.3.0-j3ujojmhirf6t2mi5enfosb6545duy42/lib64/gcc/x86_64-apple-darwin15.4.0/5.3.0/:/Users/eschnett/src/spack/opt/spack/darwin-x86_64/gcc-4.2.1/gcc-5.3.0-j3ujojmhirf6t2mi5enfosb6545duy42/lib64/gcc/x86_64-apple-darwin15.4.0/
LIBRARY_PATH=/Users/eschnett/src/spack/opt/spack/darwin-x86_64/gcc-4.2.1/gcc-5.3.0-j3ujojmhirf6t2mi5enfosb6545duy42/lib64/gcc/x86_64-apple-darwin15.4.0/5.3.0/:/Users/eschnett/src/spack/opt/spack/darwin-x86_64/gcc-4.2.1/gcc-5.3.0-j3ujojmhirf6t2mi5enfosb6545duy42/lib64/gcc/x86_64-apple-darwin15.4.0/5.3.0/../../../:/usr/lib/
COLLECT_GCC_OPTIONS='-mmacosx-version-min=10.11.4' '-fopenmp' '-march=native'
'-std=gnu++11' '-Ofast' '-S' '-v' '-shared-libgcc'
>From gcc-bugs-return-520695-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 12:25:35 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 middle-end/69526] ivopts candidate strangeness
Date: Thu, 31 Mar 2016 12:25:00 -0000
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--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to rdapp from comment #10)
> Created attachment 38144 [details]
> Tentative patch for VRP and loop-doloop
>
> Meanwhile I found the time to implement a pattern for VRP which seems to do
> the job on tree level. Although larger now (and not many cases are covered
> yet) I suppose I agree that it fits better in VRP than in ivopts and might
> even catch more cases than before.
>
> The fix on RTL level is nonetheless necessary since doloop calculates the
> number of iterations independently of the code before and also adds a +1.
> I cleaned up the fix a little by introducing niterp1_expr (niter plus 1) but
> there's still room for improvement.
>
> No regressions so far, improvement ideas welcome.
It's a bit very ad-hoc (looking at the VRP part). I think what we'd need to
do is
a) in VRP have a general helper telling you whether UNOP A or A BINOP B
overflows/underflows
b) in the existing patterns that would handle this and similar situations
in match.pd:
/* (A +- CST) +- CST -> A + CST */
(for outer_op (plus minus)
(for inner_op (plus minus)
...
use such a generic predicate to handle cases with (A +- CST) wrapped
inside a conversion (it should already be fine to handle this case
if A +- CST cannot overflow because TYPE_OVERFLOW_UNDEFINED).
c) use fold_stmt (or gimple_simplify directly) in vrp_fold_stmt to
invoke the folding machinery - eventually simply unconditionally
call fold_stmt in
tree-ssa-propagate.c:substitute_and_fold_dom_walker::before_dom_children rather
than only when we progagated into a stmt.
Even when doing the "ad-hoc" thing initially splitting out a) (implementing
only a subset of operations) would be a useful thing to do. Note that
during VRP itself you can use its own lattice while when not in VRP you'd
have to rely on SSA_NAME_RANGE_INFO.
>From gcc-bugs-return-520696-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 12:30:26 2016
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Subject: [Bug middle-end/69526] ivopts candidate strangeness
Date: Thu, 31 Mar 2016 12:30:00 -0000
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--- Comment #12 from Richard Biener <rguenth at gcc dot gnu.org> ---
So, we don't optimize at -O2
long foo (int a)
{
return (long)(a + 1) - 1;
}
Note that (T)(A +- CST1) +- CST2 -> (T)A +- CST3 thus the combined
addition in general needs to be done in the larger type _unless_ the
absolute constant value of CST3 is equal or smaller than CST1.
Handling the special case of CST1 == CST2 might be easiest here.
>From gcc-bugs-return-520697-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 12:34:18 2016
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Subject: [Bug target/70292] ICE in verify_target_availability, at sel-sched.c:1584 with -fno-inline -fno-dce -fschedule-insns -fselective-scheduling -fno-tree-dce -O1
Date: Thu, 31 Mar 2016 12:34:00 -0000
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Andrey Belevantsev <abel at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #1 from Andrey Belevantsev <abel at gcc dot gnu.org> ---
(In reply to Andrey Tarasevich from comment #0)
> Created attachment 38016 [details]
> test case with ICE
>
> This might be a duplicate of bug 64411
>
It is, I have verified that the patch for 64411 fixes this as well. However,
the patch is applied to trunk only for now. I wasn't going to backport it to
gcc-5 because 64411 doesn't have any mentions of the compiler that works. But
for this test my system opensuse gcc works. Thus it can be classified as a
regression, and I would backport it to gcc-5 branch and add also this test case
to trunk and gcc 5.
>From gcc-bugs-return-520698-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 12:35:35 2016
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Subject: [Bug c++/70462] Unnecessary "base object constructor" for final classes
Date: Thu, 31 Mar 2016 12:35:00 -0000
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--- Comment #2 from Jason Merrill <jason at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #1)
> Maybe the ABI mandates these nevertheless.
Right, the ABI doesn't say anything about final classes. Note that the extra
symbol is only an alias; there aren't two function definitions taking up space.
>From gcc-bugs-return-520699-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 12:38:58 2016
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From: "ienkovich at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/69890] FAIL: gcc.target/i386/chkp-* on x86_64-apple-darwin15
Date: Thu, 31 Mar 2016 12:38:00 -0000
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--- Comment #7 from Ilya Enkovich <ienkovich at gcc dot gnu.org> ---
Created attachment 38145
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38145&action=edit
patch
Attached patch seems to work OK on Linux and removes all string.h includes from
chkp-str* tests. I believe this should resolve all related issues on Darwing
and other targets.
Could you please test it on Darwin?
>From gcc-bugs-return-520700-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 12:50:35 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 rtl-optimization/70467] Useless "and [esp],-1" emitted on AND with uint64_t variable
Date: Thu, 31 Mar 2016 12:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70467
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
That is correct expectation, but the problem is that no pass that uses it
actually manages to update the insn.
As I said earlier, the combiner doesn't trigger, because there is just a single
insn, nothing to combine.
And CSE only triggers for & 0 and similar (which turns it into mem = 0), but
doesn't trigger for the case where we would want a no-op move.
There are two reasons for that.
One is PR35258, which wants to avoid overlapping sets, but doesn't consider
noop moves to be fine. And then, most of the architectures actually don't
allow MEM to MEM moves, so even if we get through that, we don't validate the
changes.
The following untested patch fixes that:
--- gcc/cse.c.jj 2016-02-17 11:40:19.000000000 +0100
+++ gcc/cse.c 2016-03-31 14:42:27.104824253 +0200
@@ -5166,7 +5166,7 @@ cse_insn (rtx_insn *insn)
}
/* Avoid creation of overlapping memory moves. */
- if (MEM_P (trial) && MEM_P (SET_DEST (sets[i].rtl)))
+ if (MEM_P (trial) && MEM_P (dest) && !rtx_equal_p (trial, dest))
{
rtx src, dest;
@@ -5277,6 +5277,20 @@ cse_insn (rtx_insn *insn)
break;
}
+ /* Similarly, lots of targets don't allow no-op
+ (set (mem x) (mem x)) moves. */
+ else if (n_sets == 1
+ && MEM_P (trial)
+ && MEM_P (dest)
+ && rtx_equal_p (trial, dest)
+ && !side_effects_p (dest)
+ && (cfun->can_delete_dead_exceptions
+ || insn_nothrow_p (insn)))
+ {
+ SET_SRC (sets[i].rtl) = trial;
+ break;
+ }
+
/* Reject certain invalid forms of CONST that we create. */
else if (CONSTANT_P (trial)
&& GET_CODE (trial) == CONST
@@ -5495,6 +5509,21 @@ cse_insn (rtx_insn *insn)
sets[i].rtl = 0;
}
+ /* Similarly for no-op MEM moves. */
+ else if (n_sets == 1
+ && MEM_P (SET_DEST (sets[i].rtl))
+ && MEM_P (SET_SRC (sets[i].rtl))
+ && rtx_equal_p (SET_DEST (sets[i].rtl),
+ SET_SRC (sets[i].rtl))
+ && !side_effects_p (SET_DEST (sets[i].rtl))
+ && (cfun->can_delete_dead_exceptions || insn_nothrow_p (insn)))
+ {
+ if (cfun->can_throw_non_call_exceptions && can_throw_internal (insn))
+ cse_cfg_altered = true;
+ delete_insn_and_edges (insn);
+ sets[i].rtl = 0;
+ }
+
/* If this SET is now setting PC to a label, we know it used to
be a conditional or computed branch. */
else if (dest == pc_rtx && GET_CODE (src) == LABEL_REF
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Subject: [Bug rtl-optimization/70460] [4.9/5/6 Regression] Miscompilation of glibc on i686-linux starting with r234101
Date: Thu, 31 Mar 2016 13:01:00 -0000
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--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Mar 31 13:00:52 2016
New Revision: 234614
URL: https://gcc.gnu.org/viewcvs?rev=234614&root=gcc&view=rev
Log:
PR rtl-optimization/70460
* ira.c (indirect_jump_optimize): Don't substitute LABEL_REF
with operand from REG_LABEL_OPERAND, instead substitute
SET_SRC or REG_EQUAL note content if it is a LABEL_REF.
Don't do anything for REG_NON_LOCAL_GOTO jumps.
* gcc.c-torture/execute/pr70460.c: New test.
Added:
trunk/gcc/testsuite/gcc.c-torture/execute/pr70460.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/ira.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug rtl-optimization/70460] [4.9/5/6 Regression] Miscompilation of glibc on i686-linux starting with r234101
Date: Thu, 31 Mar 2016 13:13:00 -0000
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--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Mar 31 13:13:13 2016
New Revision: 234617
URL: https://gcc.gnu.org/viewcvs?rev=234617&root=gcc&view=rev
Log:
PR rtl-optimization/70460
* ira.c (indirect_jump_optimize): Don't substitute LABEL_REF
with operand from REG_LABEL_OPERAND, instead substitute
SET_SRC or REG_EQUAL note content if it is a LABEL_REF.
Don't do anything for REG_NON_LOCAL_GOTO jumps.
* gcc.c-torture/execute/pr70460.c: New test.
Added:
branches/gcc-5-branch/gcc/testsuite/gcc.c-torture/execute/pr70460.c
Modified:
branches/gcc-5-branch/gcc/ChangeLog
branches/gcc-5-branch/gcc/ira.c
branches/gcc-5-branch/gcc/testsuite/ChangeLog
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Subject: [Bug target/63874] vtable address generation goes through memory
Date: Thu, 31 Mar 2016 13:13:00 -0000
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--- Comment #2 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> ---
(In reply to Richard Earnshaw from comment #1)
> Sounds like this might be confusion between weak definitions and weak
> references. If we have a weak reference to the object, we cannot convert it
> into a pc-relative expression, since that would mean we couldn't detect
> NULL. However, if we have a non-weak reference to a weak object we can
> replace that with a pc-relative addressing mode, _provided_ that we can
> guarantee that the definition will appear in the same link unit (ie it's not
> part of building a DSO).
Patch posted here.
https://gcc.gnu.org/ml/gcc-patches/2016-03/msg01680.html
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Subject: [Bug rtl-optimization/70460] [4.9/5/6 Regression] Miscompilation of glibc on i686-linux starting with r234101
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--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Mar 31 13:21:43 2016
New Revision: 234618
URL: https://gcc.gnu.org/viewcvs?rev=234618&root=gcc&view=rev
Log:
PR rtl-optimization/70460
* ira.c (indirect_jump_optimize): Don't substitute LABEL_REF
with operand from REG_LABEL_OPERAND, instead substitute
SET_SRC or REG_EQUAL note content if it is a LABEL_REF.
Don't do anything for REG_NON_LOCAL_GOTO jumps.
* gcc.c-torture/execute/pr70460.c: New test.
Added:
branches/gcc-4_9-branch/gcc/testsuite/gcc.c-torture/execute/pr70460.c
Modified:
branches/gcc-4_9-branch/gcc/ChangeLog
branches/gcc-4_9-branch/gcc/ira.c
branches/gcc-4_9-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-520705-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 13:22:54 2016
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Subject: [Bug rtl-optimization/70460] [4.9/5/6 Regression] Miscompilation of glibc on i686-linux starting with r234101
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #12 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug tree-optimization/70479] New: FMA is not reassociated causing x2 slowdown vs. ICC
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70479
Bug ID: 70479
Summary: FMA is not reassociated causing x2 slowdown vs. ICC
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: kyukhin at gcc dot gnu.org
Target Milestone: ---
Created attachment 38146
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38146&action=edit
Reproducer
Attached example demonstrates the issue.
GCC is recent trunk. ICC is v16.
Compile:
GCC: g++ -march=haswell -Ofast -flto -fopenmp-simd -fpermissive m.cpp -o
m.gcc
ICC: icpc -O3 -ipo -fpermissive -xAVX2 -qopenmp m.cpp -o m.icc
Run
GCC: time ./m.icc 20000 20000
ICC: time ./m.gcc 20000 20000
Hot spot generated by GCC (annotated w/ perf hit counts):
157 │8d0:┌─→vbroad 0x4(%r13),%zmm0
193 │ │ lea 0x1(%rdx),%edx
173 │ │ vmulps (%r14,%rax,1),%zmm0,%zmm0
2943│ │ vbroad 0x60(%r13),%zmm1
166 │ │ vbroad 0x5c(%r13),%zmm2
151 │ │ vbroad 0x58(%r13),%zmm3
144 │ │ vbroad 0x54(%r13),%zmm4
164 │ │ vbroad 0x50(%r13),%zmm5
170 │ │ vbroad 0x4c(%r13),%zmm6
162 │ │ vbroad 0x48(%r13),%zmm7
162 │ │ vbroad 0x44(%r13),%zmm8
154 │ │ vbroad 0x40(%r13),%zmm9
172 │ │ vbroad 0x3c(%r13),%zmm10
167 │ │ vbroad 0x38(%r13),%zmm11
172 │ │ vbroad 0x34(%r13),%zmm12
171 │ │ vbroad 0x30(%r13),%zmm13
161 │ │ vbroad 0x2c(%r13),%zmm14
176 │ │ vbroad 0x28(%r13),%zmm15
139 │ │ vbroad 0x24(%r13),%zmm16
180 │ │ vbroad 0x20(%r13),%zmm17
158 │ │ vbroad 0x1c(%r13),%zmm18
165 │ │ vbroad 0x18(%r13),%zmm19
140 │ │ vbroad 0x10(%r13),%zmm21
179 │ │ vbroad 0xc(%r13),%zmm22
146 │ │ vbroad 0x8(%r13),%zmm23
170 │ │ vbroad 0x0(%r13),%zmm24
170 │ │ vbroad 0x14(%r13),%zmm20
168 │ │ vfmadd (%r15,%rax,1),%zmm24,%zmm0
2732│ │ mov 0xb8(%rsp),%rcx
172 │ │ vfmadd (%r11,%rax,1),%zmm23,%zmm0
1649│ │ vfmadd (%rsi,%rax,1),%zmm22,%zmm0
3413│ │ vfmadd
(%rcx,%rax,1),%zmm21,%zmm0
3653│ │ mov 0xc0(%rsp),%rcx
182 │ │ vfmadd
(%rcx,%rax,1),%zmm20,%zmm0
2806│ │ mov 0xc8(%rsp),%rcx
176 │ │ vfmadd (%rcx,%rax,1),%zmm19,%zmm0
2439│ │ mov 0xd0(%rsp),%rcx
179 │ │ vfmadd (%rcx,%rax,1),%zmm18,%zmm0
2562│ │ mov 0xd8(%rsp),%rcx
197 │ │ vfmadd (%rcx,%rax,1),%zmm17,%zmm0
2867│ │ mov 0xe0(%rsp),%rcx
141 │ │ vfmadd (%rcx,%rax,1),%zmm16,%zmm0
3200│ │ mov 0xe8(%rsp),%rcx
156 │ │ vfmadd (%rcx,%rax,1),%zmm15,%zmm0
3557│ │ mov 0xf0(%rsp),%rcx
158 │ │ vfmadd (%rcx,%rax,1),%zmm14,%zmm0
3333│ │ mov 0xf8(%rsp),%rcx
143 │ │ vfmadd (%rcx,%rax,1),%zmm13,%zmm0
3004│ │ mov 0x100(%rsp),%rcx
177 │ │ vfmadd (%rcx,%rax,1),%zmm12,%zmm0
2876│ │ mov 0x108(%rsp),%rcx
144 │ │ vfmadd (%rcx,%rax,1),%zmm11,%zmm0
2838│ │ mov 0x110(%rsp),%rcx
168 │ │ vfmadd (%rcx,%rax,1),%zmm10,%zmm0
2503│ │ mov 0x118(%rsp),%rcx
203 │ │ vfmadd (%rcx,%rax,1),%zmm9,%zmm0
2471│ │ mov 0x120(%rsp),%rcx
185 │ │ vfmadd (%rcx,%rax,1),%zmm8,%zmm0
2153│ │ mov 0x128(%rsp),%rcx
152 │ │ vfmadd (%r12,%rax,1),%zmm7,%zmm0
2091│ │ vfmadd (%rbx,%rax,1),%zmm6,%zmm0
3049│ │ vfmadd (%r10,%rax,1),%zmm5,%zmm0
3737│ │ vfmadd (%r9,%rax,1),%zmm4,%zmm0
3665│ │ vfmadd (%r8,%rax,1),%zmm3,%zmm0
3627│ │ vfmadd (%rdi,%rax,1),%zmm2,%zmm0
3804│ │ vfmadd (%rcx,%rax,1),%zmm1,%zmm0
4052│ │ mov 0x130(%rsp),%rcx
160 │ │ cmp 0x138(%rsp),%edx
534 │ │ vmovup %zmm0,(%rcx,%rax,1)
3235│ │ lea 0x40(%rax),%rax
161 │ └──jb 8d0
Hot spot generated by ICC (annotated w/ perf hit counts):
344 │47a:┌─→vmulps 0x204c(%r11,%r14,4),%zmm27,%zmm2
821 │ │ vmulps 0x2050(%r11,%r14,4),%zmm4,%zmm1
318 │ │ vmulps 0x2040(%r11,%r14,4),%zmm6,%zmm29
818 │ │ vmulps 0x1840(%r11,%r14,4),%zmm7,%zmm31
275 │ │ vfmadd 0x1838(%r11,%r14,4),%zmm9,%zmm31
1234 │ │ vfmadd 0x183c(%r11,%r14,4),%zmm8,%zmm29
442 │ │ vfmadd 0x2044(%r11,%r14,4),%zmm5,%zmm2
1110 │ │ vfmadd 0x2048(%r11,%r14,4),%zmm28,%zmm1
337 │ │ vaddps %zmm29,%zmm31,%zmm0
1047 │ │ vaddps %zmm1,%zmm2,%zmm3
655 │ │ vmulps 0x1830(%r11,%r14,4),%zmm11,%zmm30
956 │ │ vmulps 0x1834(%r11,%r14,4),%zmm10,%zmm2
296 │ │ vmulps 0x1024(%r11,%r14,4),%zmm15,%zmm1
1050 │ │ vmulps 0x1028(%r11,%r14,4),%zmm14,%zmm31
294 │ │ vaddps %zmm0,%zmm3,%zmm3
1057 │ │ vfmadd 0x102c(%r11,%r14,4),%zmm13,%zmm30
344 │ │ vfmadd 0x1030(%r11,%r14,4),%zmm12,%zmm2
911 │ │ vfmadd 0x1020(%r11,%r14,4),%zmm16,%zmm31
332 │ │ vfmadd 0x820(%r11,%r14,4),%zmm17,%zmm1
885 │ │ vaddps %zmm2,%zmm30,%zmm29
486 │ │ vmulps 0x818(%r11,%r14,4),%zmm19,%zmm2
837 │ │ vaddps %zmm31,%zmm1,%zmm30
487 │ │ vmulps 0x81c(%r11,%r14,4),%zmm18,%zmm1
851 │ │ vfmadd 0x810(%r11,%r14,4),%zmm21,%zmm2
424 │ │ vfmadd 0x814(%r11,%r14,4),%zmm20,%zmm1
1123 │ │ vaddps %zmm30,%zmm29,%zmm29
389 │ │ vaddps %zmm1,%zmm2,%zmm31
1372 │ │ vmulps 0xc(%r11,%r14,4),%zmm23,%zmm2
311 │ │ vmulps 0x10(%r11,%r14,4),%zmm22,%zmm1
916 │ │ vaddps %zmm29,%zmm3,%zmm3
297 │ │ vfmadd (%r11,%r14,4),%zmm26,%zmm2
795 │ │ vfmadd 0x8(%r11,%r14,4),%zmm24,%zmm1
426 │ │ vaddps %zmm1,%zmm2,%zmm0
1275 │ │ vmulps 0x208c(%r11,%r14,4),%zmm27,%zmm1
364 │ │ vmulps 0x2080(%r11,%r14,4),%zmm6,%zmm30
1061 │ │ vfmadd 0x4(%r11,%r14,4),%zmm25,%zmm0
473 │ │ vfmadd 0x2084(%r11,%r14,4),%zmm5,%zmm1
1106 │ │ vaddps %zmm31,%zmm0,%zmm2
327 │ │ vmulps 0x2090(%r11,%r14,4),%zmm4,%zmm0
1410 │ │ vmulps 0x1880(%r11,%r14,4),%zmm7,%zmm29
274 │ │ vfmadd 0x2088(%r11,%r14,4),%zmm28,%zmm0
1317 │ │ vaddps %zmm2,%zmm3,%zmm2
364 │ │ vmulps 0x1874(%r11,%r14,4),%zmm10,%zmm3
1196 │ │ vaddps %zmm0,%zmm1,%zmm31
408 │ │ nop
9 │ │ vmulps 0x1870(%r11,%r14,4),%zmm11,%zmm0
374 │ │ vfmadd 0x1878(%r11,%r14,4),%zmm9,%zmm29
1515 │ │ vfmadd 0x187c(%r11,%r14,4),%zmm8,%zmm30
333 │ │ vfmadd 0x106c(%r11,%r14,4),%zmm13,%zmm0
1728 │ │ vfmadd 0x1070(%r11,%r14,4),%zmm12,%zmm3
306 │ │ vaddps %zmm30,%zmm29,%zmm1
1778 │ │ vmulps 0x1064(%r11,%r14,4),%zmm15,%zmm29
321 │ │ vaddps %zmm3,%zmm0,%zmm0
1826 │ │ vmulps 0x1068(%r11,%r14,4),%zmm14,%zmm3
347 │ │ vfmadd 0x860(%r11,%r14,4),%zmm17,%zmm29
1562 │ │ vaddps %zmm1,%zmm31,%zmm1
239 │ │ vfmadd 0x1060(%r11,%r14,4),%zmm16,%zmm3
1600 │ │ vmulps 0x85c(%r11,%r14,4),%zmm18,%zmm30
311 │ │ vaddps %zmm3,%zmm29,%zmm3
1776 │ │ vmulps 0x858(%r11,%r14,4),%zmm19,%zmm29
338 │ │ vfmadd 0x854(%r11,%r14,4),%zmm20,%zmm30
1588 │ │ vfmadd 0x850(%r11,%r14,4),%zmm21,%zmm29
292 │ │ vaddps %zmm3,%zmm0,%zmm0
1331 │ │ vaddps %zmm30,%zmm29,%zmm31
460 │ │ vmulps 0x4c(%r11,%r14,4),%zmm23,%zmm29
1365 │ │ vmulps 0x50(%r11,%r14,4),%zmm22,%zmm30
347 │ │ vaddps %zmm0,%zmm1,%zmm1
1461 │ │ vfmadd 0x40(%r11,%r14,4),%zmm26,%zmm29
489 │ │ vfmadd 0x48(%r11,%r14,4),%zmm24,%zmm30
1583 │ │ vaddps %zmm30,%zmm29,%zmm30
875 │ │ vfmadd 0x44(%r11,%r14,4),%zmm25,%zmm30
1912 │ │ vmovup %zmm2,0x1028(%r13,%r14,4)
1536 │ │ vaddps %zmm31,%zmm30,%zmm31
1472 │ │ vaddps %zmm31,%zmm1,%zmm0
1088 │ │ vmovup %zmm0,0x1068(%r13,%r14,4)
1644 │ │ add $0x20,%r14
182 │ │ cmp $0x200,%r14
10 │ └──jb 47a
The issue is that we not doing rebalancing of FMA calculations.
This issue might be reproduced on Haswell as well, although because
of shorter vector perf difference is about 30%
>From gcc-bugs-return-520707-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 13:26:02 2016
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Subject: [Bug tree-optimization/70479] FMA is not reassociated causing x2 slowdown vs. ICC
Date: Thu, 31 Mar 2016 13:26:00 -0000
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--- Comment #1 from Kirill Yukhin <kyukhin at gcc dot gnu.org> ---
(In reply to Kirill Yukhin from comment #0)
> Compile:
> GCC: g++ -march=haswell -Ofast -flto -fopenmp-simd -fpermissive m.cpp -o
> m.gcc
> ICC: icpc -O3 -ipo -fpermissive -xAVX2 -qopenmp m.cpp -o m.icc
Correct compile commands (original are for Haswell)
GCC: g++ -march=knl -Ofast -flto -fopenmp-simd -fpermissive m.cpp -o m.gcc
ICC: icpc -O3 -ipo -fpermissive -xMIC-AVX512 -qopenmp m.cpp -o m.icc
>From gcc-bugs-return-520708-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 13:28:42 2016
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Subject: [Bug tree-optimization/70479] FMA is not reassociated causing x2 slowdown vs. ICC
Date: Thu, 31 Mar 2016 13:28:00 -0000
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
You mean we fail to handle ternary associative tree codes in GIMPLE reassoc?
Yes, that's true. It's not going to be easy to retro-fit there
implementation-wise. With rebalancing you mean handling reassoc-width > 1?
>From gcc-bugs-return-520709-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 13:43:31 2016
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Subject: [Bug rtl-optimization/70478] [LRA] S/390: Performance regression - superfluous stack frame
Date: Thu, 31 Mar 2016 13:43:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ra
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-03-31
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
It seems to somehow "optimize" with regard to the and op being unsigned char
and thus all upper bits being zero and only the lower ones need to be computed?
Before RA
(insn 7 4 8 2 (set (reg:SI 66 [ *b_4(D)+-3 ])
(zero_extend:SI (mem:QI (reg:DI 3 %r3 [ b ]) [0 *b_4(D)+0 S1 A8])))
t.c:3 1209 {*zero_extendqisi2_extimm}
(expr_list:REG_DEAD (reg:DI 3 %r3 [ b ])
(nil)))
(insn 8 7 11 2 (parallel [
(set (mem:SI (reg:DI 2 %r2 [ a ]) [1 *a_2(D)+0 S4 A32])
(and:SI (mem:SI (reg:DI 2 %r2 [ a ]) [1 *a_2(D)+0 S4 A32])
(reg:SI 66 [ *b_4(D)+-3 ])))
(clobber (reg:CC 33 %cc))
]) t.c:3 1473 {*andsi3_zarch}
(expr_list:REG_DEAD (reg:SI 66 [ *b_4(D)+-3 ])
(expr_list:REG_DEAD (reg:DI 2 %r2 [ a ])
(expr_list:REG_UNUSED (reg:CC 33 %cc)
(nil)))))
after
(insn 7 4 8 2 (set (reg:SI 66 [ *b_4(D)+-3 ])
(zero_extend:SI (mem:QI (reg:DI 3 %r3 [ b ]) [0 *b_4(D)+0 S1 A8])))
t.c:3 1209 {*zero_extendqisi2_extimm}
(expr_list:REG_DEAD (reg:DI 3 %r3 [ b ])
(nil)))
(insn 8 7 11 2 (parallel [
(set (mem:SI (reg:DI 2 %r2 [ a ]) [1 *a_2(D)+0 S4 A32])
(and:SI (mem:SI (reg:DI 2 %r2 [ a ]) [1 *a_2(D)+0 S4 A32])
(reg:SI 66 [ *b_4(D)+-3 ])))
(clobber (reg:CC 33 %cc))
]) t.c:3 1473 {*andsi3_zarch}
(expr_list:REG_DEAD (reg:SI 66 [ *b_4(D)+-3 ])
(expr_list:REG_DEAD (reg:DI 2 %r2 [ a ])
(expr_list:REG_UNUSED (reg:CC 33 %cc)
(nil)))))
but then LRA chooses to spill while reload is happy with the above.
>From gcc-bugs-return-520710-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 13:50:23 2016
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Subject: [Bug c++/69564] [5/6 Regression] lto and/or C++ make scimark2 LU slower
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--- Comment #25 from Richard Biener <rguenth at gcc dot gnu.org> ---
I benchmarked the patch in comment#17 with a full three-run on all_cpp
on a Haswell machine with -Ofast -march=native (peak is patched).
Estimated Estimated
Base Base Base Peak Peak Peak
Benchmarks Ref. Run Time Ratio Ref. Run Time Ratio
-------------- ------ --------- --------- ------ --------- ---------
400.perlbench NR NR
401.bzip2 NR NR
403.gcc NR NR
429.mcf NR NR
445.gobmk NR NR
456.hmmer NR NR
458.sjeng NR NR
462.libquantum NR NR
464.h264ref NR NR
471.omnetpp 6250 315 19.9 * 6250 312 20.0 *
473.astar 7020 323 21.7 * 7020 323 21.7 *
483.xalancbmk 6900 193 35.8 * 6900 192 35.9 *
Est. SPECint_base2006 --
Est. SPECint2006 --
Estimated Estimated
Base Base Base Peak Peak Peak
Benchmarks Ref. Run Time Ratio Ref. Run Time Ratio
-------------- ------ --------- --------- ------ --------- ---------
410.bwaves NR NR
416.gamess NR NR
433.milc NR NR
434.zeusmp NR NR
435.gromacs NR NR
436.cactusADM NR NR
437.leslie3d NR NR
444.namd 8020 300 26.7 * 8020 300 26.8 *
447.dealII 11440 253 45.3 * 11440 257 44.5 *
450.soplex 8340 218 38.3 * 8340 218 38.2 *
453.povray 5320 120 44.2 * 5320 120 44.2 *
454.calculix NR NR
459.GemsFDTD NR NR
465.tonto NR NR
470.lbm NR NR
481.wrf NR NR
482.sphinx3 NR NR
Est. SPECfp_base2006 --
Est. SPECfp2006 --
dealII might be not noise, three runs are
447.dealII 11440 319 35.8 S 11440 257 44.5 S
447.dealII 11440 252 45.4 S 11440 257 44.5 *
447.dealII 11440 253 45.3 * 11440 256 44.7 S
and I think we can take peak values (stupid CPU freq boosting).
I'm re-running just 447.dealII now, results tomorrow. Binaries do differ.
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From: "abel at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/64411] ICE: in verify_target_availability, at sel-sched.c:1577 with -Os -mcmodel=medium -fPIC -fschedule-insns -fselective-scheduling
Date: Thu, 31 Mar 2016 13:51:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64411
--- Comment #4 from Andrey Belevantsev <abel at gcc dot gnu.org> ---
Author: abel
Date: Thu Mar 31 13:50:15 2016
New Revision: 234620
URL: https://gcc.gnu.org/viewcvs?rev=234620&root=gcc&view=rev
Log:
Backport from mainline
2016-03-15 Andrey Belevantsev <abel@ispras.ru>
gcc/
PR target/64411
* sched-deps.c (get_implicit_reg_pending_clobbers): New function,
factored out from ...
(sched_analyze_insn): ... here.
* sched-int.h (get_implicit_reg_pending_clobbers): Declare it.
* sel-sched-ir.c (setup_id_implicit_regs): New function, use
get_implicit_reg_pending_clobbers in it.
(setup_id_reg_sets): Use setup_id_implicit_regs.
(deps_init_id): Ditto.
testsuite/
PR target/64411
* gcc.target/i386/pr64411.C: New test.
Added:
branches/gcc-5-branch/gcc/testsuite/gcc.target/i386/pr64411.C
Modified:
branches/gcc-5-branch/gcc/ChangeLog
branches/gcc-5-branch/gcc/sched-deps.c
branches/gcc-5-branch/gcc/sched-int.h
branches/gcc-5-branch/gcc/sel-sched-ir.c
branches/gcc-5-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-520712-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 31 13:52:42 2016
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From: Ian Lance Taylor <ian@airs.com>
To: Philippe Daouadi <blastrock0@free.fr>
Cc: dj@redhat.com, gcc-bugs@gcc.gnu.org
Subject: Re: [BUG] Crash when demangling with libiberty
References: <56FC1576.80701@free.fr>
Date: Thu, 31 Mar 2016 13:52:00 -0000
In-Reply-To: <56FC1576.80701@free.fr> (Philippe Daouadi's message of "Wed, 30 Mar 2016 20:05:42 +0200")
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Philippe Daouadi <blastrock0@free.fr> writes:
> I have been given these e-mail addresses by Nick Clifton after
> reporting a bug on binutils here:
> https://sourceware.org/bugzilla/show_bug.cgi?id\x19877 . The bug is in
> libiberty, according to him.
>
> The bug boils down to this command (and objdump, and lldb) crashing:
>
> c++filt
> _ZSt4moveIRZN11tconcurrent6futureIvE4thenIZ5awaitIS2_EDaOT_EUlRKS6_E_EENS1_INSt5decayIDTclfp_defpTEEE4typeEEES7_EUlvE_EONSt16remove_referenceIS6_E4typeES7_
>
> I'm using c++filt from binutils 2.26 and have gcc 5.3.1-8 on a debian
> unstable if it is of any matter.
Please refile your bug report at https://gcc.gnu.org/bugzilla . If at
all possible, please include the preprocessed source code that produces
the symbol (you can get this by passing the --save-temps option to the
compiler; we want the .ii file) and please include complete details on
the compiler that produced the symbol. Thanks.
Ian
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