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* [Bug sanitizer/85663] New: gcc-8.0.1 regression: sanitizer fails to build on mips-unknown-linux-gnu
@ 2018-05-05 8:51 slyfox at inbox dot ru
0 siblings, 0 replies; only message in thread
From: slyfox at inbox dot ru @ 2018-05-05 8:51 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85663
Bug ID: 85663
Summary: gcc-8.0.1 regression: sanitizer fails to build on
mips-unknown-linux-gnu
Product: gcc
Version: 8.0.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: sanitizer
Assignee: unassigned at gcc dot gnu.org
Reporter: slyfox at inbox dot ru
CC: dodji at gcc dot gnu.org, dvyukov at gcc dot gnu.org,
jakub at gcc dot gnu.org, kcc at gcc dot gnu.org, marxin at gcc dot gnu.org
Target Milestone: ---
In file included from
/tmp/portage/cross-mips-unknown-linux-gnu/gcc-8.1.0-r1/work/gcc-8.1.0/libsanitizer/sanitizer_common/sanitizer_platform_limits_linux.cc:20:
/tmp/portage/cross-mips-unknown-linux-gnu/gcc-8.1.0-r1/work/gcc-8.1.0/libsanitizer/sanitizer_common/sanitizer_internal_defs.h:317:72:
error: size of array ‘assertion_failed__71’ is negative
typedef char IMPL_PASTE(assertion_failed_##_, line)[2*(int)(pred)-1]
^
/tmp/portage/cross-mips-unknown-linux-gnu/gcc-8.1.0-r1/work/gcc-8.1.0/libsanitizer/sanitizer_common/sanitizer_internal_defs.h:311:30:
note: in expansion of macro ‘IMPL_COMPILER_ASSERT’
#define COMPILER_CHECK(pred) IMPL_COMPILER_ASSERT(pred, __LINE__)
^~~~~~~~~~~~~~~~~~~~
/tmp/portage/cross-mips-unknown-linux-gnu/gcc-8.1.0-r1/work/gcc-8.1.0/libsanitizer/sanitizer_common/sanitizer_platform_limits_linux.cc:71:1:
note: in expansion of macro ‘COMPILER_CHECK’
COMPILER_CHECK(struct_kernel_stat_sz == sizeof(struct stat));
^~~~~~~~~~~~~~
I think it is caused by this patch:
https://github.com/gcc-mirror/gcc/commit/36093749ff955d9e8cf208b04724c3a1a2ac9b04
libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.h
#elif defined(__mips__)
const unsigned struct_kernel_stat_sz =
SANITIZER_ANDROID ? FIRST_32_SECOND_64(104, 128) :
- FIRST_32_SECOND_64(144, 216);
+ FIRST_32_SECOND_64(160, 216);
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/85663] gcc-8.0.1 regression: sanitizer fails to build on mips-unknown-linux-gnu
Date: Sat, 05 May 2018 08:54:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85663
--- Comment #1 from Sergei Trofimovich <slyfox at inbox dot ru> ---
GCC was configures as:
/tmp/portage/cross-mips-unknown-linux-gnu/gcc-8.1.0-r1/work/gcc-8.1.0/configure
--host=x86_64-pc-linux-gnu --target=mips-unknown-linux-gnu
--build=x86_64-pc-linux-gnu --prefix=/usr
--bindir=/usr/x86_64-pc-linux-gnu/mips-unknown-linux-gnu/gcc-bin/8.1.0
--includedir=/usr/lib/gcc/mips-unknown-linux-gnu/8.1.0/include
--datadir=/usr/share/gcc-data/mips-unknown-linux-gnu/8.1.0
--mandir=/usr/share/gcc-data/mips-unknown-linux-gnu/8.1.0/man
--infodir=/usr/share/gcc-data/mips-unknown-linux-gnu/8.1.0/info
--with-gxx-include-dir=/usr/lib/gcc/mips-unknown-linux-gnu/8.1.0/include/g++-v8
--with-python-dir=/share/gcc-data/mips-unknown-linux-gnu/8.1.0/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 8.1.0-r1 p1.1 --disable-esp --enable-libstdcxx-time
--enable-poison-system-directories --with-sysroot=/usr/mips-unknown-linux-gnu
--disable-bootstrap --enable-__cxa_atexit --enable-clocale=gnu
--disable-multilib --disable-altivec --disable-fixed-point --with-abi=
--disable-libgcj --enable-libgomp --disable-libmudflap --disable-libssp
--disable-libmpx --enable-vtable-verify --enable-libvtv --enable-lto
--without-isl --enable-libsanitizer --enable-default-pie --enable-default-ssp
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/85662] [8/9 Regression] "error: non-constant condition for static assertion" from __builtin_offsetof in C++
Date: Sat, 05 May 2018 09:02:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 44076
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44076&action=edit
gcc8-pr85662.patch
Untested fix.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/85663] gcc-8.0.1 regression: sanitizer fails to build on mips-unknown-linux-gnu
Date: Sat, 05 May 2018 09:07:00 -0000
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--- Comment #2 from Sergei Trofimovich <slyfox at inbox dot ru> ---
> - FIRST_32_SECOND_64(144, 216);
> + FIRST_32_SECOND_64(160, 216);
I think mips has really 3 stat values:
32 ABI: 144
n32 ABI: 160
64 ABI: 216
$ cat a.c
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
int main() {
return sizeof(struct stat);
}
$ mips-unknown-linux-gnu-gcc -E -dM - </dev/null | fgrep MIPS_SIM
#define _MIPS_SIM _ABIO32
$ mips-unknown-linux-gnu-gcc -S -O2 a.c && grep '[^a]li' a.s
li $2,144 # 0x90
$ mips64-unknown-linux-gnu-gcc -E -dM - </dev/null | fgrep MIPS_SIM
#define _MIPS_SIM _ABIN32
$ mips64-unknown-linux-gnu-gcc -S -O2 a.c && grep '[^a]li' a.s
li $2,160 # 0xa0
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Subject: [Bug c/85661] double comparison illegally statically reduced
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
If this is on i?86 32-bit, then most likely you just aren't taking into account
the extended precision and the default -fexcess-precision=fast mode.
So, either if you want excess precision, but require the C rules (and are using
C), you need to use -fexcess-precision=standard (default in strict C std
modes), or if you don't want excess precision, make sure you have SSE2 or later
hw and use -msse2 -mfpmath=sse. In any case, that is a user error rather than
compiler bug.
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Subject: [Bug sanitizer/85663] gcc-8.0.1 regression: sanitizer fails to build on mips-unknown-linux-gnu
Date: Sat, 05 May 2018 09:25:00 -0000
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--- Comment #3 from Sergei Trofimovich <slyfox at inbox dot ru> ---
Created attachment 44077
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44077&action=edit
gcc-8.1.0-mips-o32-asan.patch
gcc-8.1.0-mips-o32-asan.patch is enough to get asan cross-compiled on o32 ABI.
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Subject: [Bug lto/69866] lto1: internal compiler error: in add_symbol_to_partition_1, at lto/lto-partition.c:158
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Thomas Preud'homme <thopre01 at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |8.1.0
--- Comment #15 from Thomas Preud'homme <thopre01 at gcc dot gnu.org> ---
Fixed in r249224 and thus fixed on 8.1
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Subject: [Bug rtl-optimization/71878] ICE in cselib_record_set
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Thomas Preud'homme <thopre01 at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Known to work| |6.3.0
Resolution|--- |FIXED
Known to fail|6.2.1 |6.2.0
--- Comment #6 from Thomas Preud'homme <thopre01 at gcc dot gnu.org> ---
Backported to GCC 6 as r240257, therefore fixed on all currently supported
releases.
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From: "gcc at mailed dot e4ward.com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/85664] New: Don't ask questions if tere's no way to answer
Date: Sat, 05 May 2018 10:27:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85664
Bug ID: 85664
Summary: Don't ask questions if tere's no way to answer
Product: gcc
Version: 7.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
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(gcc (Ubuntu 7.3.0-16ubuntu3) 7.3.0)
How is the weather today?
All readers who are now irritated that they can't very well go and react to a
bug report solely to write about the weather, will realise that I should not
have asked about the weather somewhere where the reader can't answer me. This
is a standard for any publication: Don't ask the audience a question if they
have no way to reply.
Yet, every time I mistype a name - which with my co-ordination is a rather
frequent occurrence - GCC will now ask me: "; did you mean ‘<alternative>’?".
I find offering an alternative an interesting concept. I haven't even looked up
yet how to switch it off as it's usually correct. (I do get the impression the
guesses are about the fairly obvious, which is when they are fairly obvious to
me as well, suggesting this doesn't add much.) But they are suggestions, not
questions.
A development environment can ask question i this situation because, when the
user replies by activating the confirm function, it can actually modify the
code it's holding. A stand-alone compiler should not ask questions.
Could this please be reworded?
Bye,
Mysha
>From gcc-bugs-return-603780-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 05 11:32:31 2018
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/85659] [6/7/8/9 Regression] ICE with inline assembly inside virtual function
Date: Sat, 05 May 2018 11:32:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-05-05
CC| |jakub at gcc dot gnu.org
Target Milestone|--- |6.5
Summary|ICE with inline assembly |[6/7/8/9 Regression] ICE
|inside virtual function |with inline assembly inside
| |virtual function
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r232167, before it likely just emitted wrong code.
Short testcase:
struct S { S (); ~S (); int s; };
void
foo (S &s)
{
asm volatile ("" : "+m,r" (s) : : "memory");
}
ICEs even with "+g" instead of "+m,r".
>From gcc-bugs-return-603781-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 05 11:33:32 2018
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Subject: [Bug c++/85659] [6/7/8/9 Regression] ICE with inline assembly inside virtual function
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 44078
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44078&action=edit
gcc8-pr85659.patch
Untested fix.
>From gcc-bugs-return-603782-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 05 15:17:45 2018
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From: "manuel.serrano at inria dot fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/85661] double comparison illegally statically reduced
Date: Sat, 05 May 2018 15:17:00 -0000
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--- Comment #2 from manuel.serrano at inria dot fr ---
Dear Jakub,
Thank you very much for your useful answer. I was indeed ignorant of the
-fexcess-precision=fast option and as you suggested "-msse2 -mfpmath=sse"
solves the problem. I'm still puzzled why inserting a dummy printf changes
the behaviour of the double equality test. Is that expected?
>From gcc-bugs-return-603784-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 05 15:37:08 2018
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Subject: [Bug middle-end/323] optimized code gives strange floating point results
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |manuel.serrano at inria dot fr
--- Comment #204 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
*** Bug 85661 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-603783-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 05 15:36:38 2018
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/85661] double comparison illegally statically reduced
Date: Sat, 05 May 2018 15:36:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
See bug 323.
*** This bug has been marked as a duplicate of bug 323 ***
>From gcc-bugs-return-603785-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 05 16:46:47 2018
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From: "glaubitz at physik dot fu-berlin.de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/81084] [8 Regression] powerpcspe port full of confusing configury / command-line options not related to SPE
Date: Sat, 05 May 2018 16:46:00 -0000
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--- Comment #54 from John Paul Adrian Glaubitz <glaubitz at physik dot fu-berlin.de> ---
Just tried a native build with gcc from trunk plus the patch, fails due to an
apparent syntax error:
powerpc-linux-gnuspe-g++ -std=gnu++98 -g -DIN_GCC -fno-exceptions
-fno-rtti -fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings
-Wcast-qual -Wno-format -Wmissing-format-attribute -Woverloaded-virtual
-pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings
-fno-common -DHAVE_CONFIG_H -DGENERATOR_FILE -fno-PIE -static-libstdc++
-static-libgcc -no-pie -o build/genmatch \
build/genmatch.o ../../build-powerpc-linux-gnuspe/libcpp/libcpp.a
build/errors.o build/vec.o build/hash-table.o
../../build-powerpc-linux-gnuspe/libiberty/libiberty.a
build/genmddeps ../.././gcc/common.md
../.././gcc/config/powerpcspe/powerpcspe.md > tmp-mddeps
../.././gcc/config/powerpcspe/powerpcspe.md:4362:1: unterminated construct
make[3]: *** [Makefile:2306: s-mddeps] Error 1
make[3]: *** Waiting for unfinished jobs....
rm fsf-funding.pod gcov.pod gpl.pod cpp.pod gfdl.pod gcc.pod gcov-dump.pod
gcov-tool.pod
make[3]: Leaving directory '/srv/glaubitz/gcc/host-powerpc-linux-gnuspe/gcc'
make[2]: *** [Makefile:4624: all-stage1-gcc] Error 2
make[2]: Leaving directory '/srv/glaubitz/gcc'
make[1]: *** [Makefile:23666: stage1-bubble] Error 2
make[1]: Leaving directory '/srv/glaubitz/gcc'
make: *** [Makefile:953: all] Error 2
Configured with ./configure --build=powerpc-linux-gnuspe
--host=powerpc-linux-gnuspe --target=powerpc-linux-gnuspe --enable-obsolete
--with-cpu=8548 --enable-e500_double --with-long-double-128
--disable-libphobos
>From gcc-bugs-return-603786-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 05 16:52:55 2018
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From: "glaubitz at physik dot fu-berlin.de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/81084] [8 Regression] powerpcspe port full of confusing configury / command-line options not related to SPE
Date: Sat, 05 May 2018 16:52:00 -0000
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--- Comment #55 from John Paul Adrian Glaubitz <glaubitz at physik dot fu-berlin.de> ---
This seems to help:
diff --git a/gcc/config/powerpcspe/powerpcspe.md
b/gcc/config/powerpcspe/powerpcspe.md
index 746f2bd1ee3..2e08bcea2b5 100644
--- a/gcc/config/powerpcspe/powerpcspe.md
+++ b/gcc/config/powerpcspe/powerpcspe.md
@@ -4367,7 +4367,7 @@
"#"
[(set_attr "type" "store,store,load,load,*,*")
(set_attr "update" "yes")
- (set_attr "indexed" "yes")]
+ (set_attr "indexed" "yes")])
(define_split
[(set (match_operand:TI2 0 "nonimmediate_operand" "")
@@ -4671,7 +4671,7 @@
(clobber (reg:SI LR_REGNO))])]
""
[(set_attr "type" "two")
- (set (attr "length") (const_int 16))]
+ (set (attr "length") (const_int 16))])
(define_insn_and_split "tls_gd_sysv<TLSmode:tls_sysv_suffix>"
[(set (match_operand:TLSmode 0 "gpc_reg_operand" "=b")
>From gcc-bugs-return-603787-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 05 17:11:27 2018
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From: "glaubitz at physik dot fu-berlin.de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/81084] [8 Regression] powerpcspe port full of confusing configury / command-line options not related to SPE
Date: Sat, 05 May 2018 17:11:00 -0000
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--- Comment #56 from John Paul Adrian Glaubitz <glaubitz at physik dot fu-berlin.de> ---
Another issue:
In file included from ../.././gcc/config/powerpcspe/powerpcspe.h:1865:0,
from ./tm.h:25,
from ../.././gcc/genopinit.c:24:
../.././gcc/config/powerpcspe/powerpcspe-builtin.def:212:14: error: expected
‘}’ before ‘(’ token
BU_P7_MISC_2 (DIVWE, "divwe", CONST, dive_si)
^
../.././gcc/config/powerpcspe/powerpcspe-builtin.def:212:20: error: expected
‘)’ before ‘,’ token
BU_P7_MISC_2 (DIVWE, "divwe", CONST, dive_si)
^
../.././gcc/config/powerpcspe/powerpcspe-builtin.def:212:23: error: expected
unqualified-id before string constant
BU_P7_MISC_2 (DIVWE, "divwe", CONST, dive_si)
^~~~~~~
In file included from ./tm.h:25:0,
from ../.././gcc/genopinit.c:24:
../.././gcc/config/powerpcspe/powerpcspe.h:1868:1: error: expected declaration
before ‘}’ token
};
^
In file included from ../.././gcc/config/powerpcspe/powerpcspe.h:1865:0,
from ./tm.h:25,
from ../.././gcc/genattrtab.c:108:
../.././gcc/config/powerpcspe/powerpcspe-builtin.def:212:14: error: expected
‘}’ before ‘(’ token
BU_P7_MISC_2 (DIVWE, "divwe", CONST, dive_si)
^
../.././gcc/config/powerpcspe/powerpcspe-builtin.def:212:20: error: expected
‘)’ before ‘,’ token
BU_P7_MISC_2 (DIVWE, "divwe", CONST, dive_si)
^
../.././gcc/config/powerpcspe/powerpcspe-builtin.def:212:23: error: expected
unqualified-id before string constant
BU_P7_MISC_2 (DIVWE, "divwe", CONST, dive_si)
^~~~~~~
In file included from ./tm.h:25:0,
from ../.././gcc/genattrtab.c:108:
../.././gcc/config/powerpcspe/powerpcspe.h:1868:1: error: expected declaration
before ‘}’ token
};
^
Here I haven't figured out yet where the syntax error is. Either in
gcc/config/powerpcspe/powerpcspe.h or
gcc/config/powerpcspe/powerpcspe-builtin.def.
What I noticed that gcc/config/powerpcspe/powerpcspe-builtin.def has some stray
control sequences "^L" around line 212. Removing them did not change anything
though.
>From gcc-bugs-return-603788-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 05 17:56:58 2018
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Subject: [Bug c++/82953] ICE in tree_check() ../../gcc/gcc/tree.h:3087
Date: Sat, 05 May 2018 17:56:00 -0000
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--- Comment #2 from Sergei Trofimovich <slyfox at inbox dot ru> ---
Does not crash on gcc-8. Still crashes on gcc-7.3.0.
>From gcc-bugs-return-603789-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 05 18:59:06 2018
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From: "harald at gigawatt dot nl" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/40838] gcc shouldn't assume that the stack is aligned
Date: Sat, 05 May 2018 18:59:00 -0000
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Harald van Dijk <harald at gigawatt dot nl> changed:
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----------------------------------------------------------------------------
CC| |harald at gigawatt dot nl
--- Comment #90 from Harald van Dijk <harald at gigawatt dot nl> ---
Given how many years have passed I expect it's too late for anything to change,
but for completeness:
Assuming the stack is aligned breaks existing binaries compiled with old GCC
versions, and with GCC 8 this becomes far more visible. Minimal test case:
compile
void exit(int);
int main(void) { exit(0); }
with GCC 2.8, compile current glibc with GCC 8, and there will be a segfault in
glibc's __run_exit_handlers because GCC 2.8 never kept the stack
16-byte-aligned, but GCC 8 does now generate code which assumes it.
Yes, I've actually been running GCC 2.8-compiled binaries that have only now
become broken as a result of this. This is not hypothetical. For the moment,
I've rebuilt glibc with -mincoming-stack-boundary=2 to handle the problem well
enough for my current needs, but it's not a complete solution.
>From gcc-bugs-return-603790-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 05 19:18:01 2018
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Subject: [Bug c/85665] New: Multiple typos in diagnostics
Date: Sat, 05 May 2018 19:18:00 -0000
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Bug ID: 85665
Summary: Multiple typos in diagnostics
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Specify use soft floating point ABI which mean alias to -mabi=2.
Specify use soft floating point ABI which mean alias to -mabi=2fp+.
Specify a fpu configuration value from 0 to 7; 0-3 is as FPU spec says, and 4-7
is corresponding to 0-3.
a => an
Specify how many read/write ports for n9/n10 cores. The value should be 3r2w
or 2r1w.
* double space
* the first sentence no verb
Always save $lp in the stack.
in => on
one field is bitfield while other is not
"" => a
"" => the
Disable FPU ISA, the ABI option must be enable '-mfloat-abi=soft'
'-mabi=2fp+' option only support when FPU available, must be enable
'-mext-fpu-sp' or '-mext-fpu-dp'
Known floating-point number of registers (for use with the -mconfig-fpu=
option):
this builtin function not support on the v3m toolchain
CCTL intrinsic function subtype out of range!
THERE IS AN EXCLAMATION MARK !!!ONEELEVEN!!!!
/* Note the cctl divide to 5 group and share the same name table. */
In general:
* Please make sure that no diagnostic message ever ends with an exclamation
mark!!!
* Please make sure that every diagnostic that uses 'straight' "quotes" is
listed in a special white-list. All other diagnostics must only use
%<typographical%> quotes.
It's really simple to write a little program that checks the above things. As a
translator, I don't want check them each month again.
Especially in the month before a release, these changes should only be done
very carefully. I have the impression that there are more typos than in the
previous months.
>From gcc-bugs-return-603791-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 05 19:19:28 2018
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Subject: [Bug c/85665] Multiple typos in diagnostics
Date: Sat, 05 May 2018 19:19:00 -0000
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--- Comment #1 from Roland Illig <roland.illig at gmx dot de> ---
To give a bit of context: All these typos have been introduced after b20180401,
which gives them only very little time to be discovered.
>From gcc-bugs-return-603792-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 05 19:48:52 2018
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Subject: [Bug target/85665] Multiple typos in diagnostics
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-05-05
Ever confirmed|0 |1
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Subject: [Bug target/85665] Multiple typos in diagnostics
Date: Sat, 05 May 2018 20:01:00 -0000
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
It might be better to report multiple bugs, one per target backend, so that the
relevant target maintainers are informed.
To avoid similar problems in future, I wonder if a weekly email detailing any
new or modified diagnostics could be produced automatically. The diagnostics
maintainers (and anybody else interested) could look over it and ensure that we
use correct grammar, punctuation, and style.
>From gcc-bugs-return-603794-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 05 20:03:30 2018
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Subject: [Bug c/85664] Don't ask questions if tere's no way to answer
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
See also PR 84890 (I think this could be considered a duplicate of that one).
>From gcc-bugs-return-603795-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 05 20:50:21 2018
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Subject: [Bug c/85666] New: gcc-8.0.1 fails to build mmix target: gcc/libgcc/libgcc2.h:203:20: internal compiler error: in leaf_function_p, at final.c:4488
Date: Sat, 05 May 2018 20:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85666
Bug ID: 85666
Summary: gcc-8.0.1 fails to build mmix target:
gcc/libgcc/libgcc2.h:203:20: internal compiler error:
in leaf_function_p, at final.c:4488
Product: gcc
Version: 8.0.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: slyfox at inbox dot ru
Target Milestone: ---
gcc-7.3.0 worked. gcc-8.0.1 fails as:
/home/slyfox/dev/git/gcc-mmix/./gcc/xgcc -B/home/slyfox/dev/git/gcc-mmix/./gcc/
-B/home/slyfox/dev/git/gcc-mmix/../gcc-mmix-installed/mmix/bin/
-B/home/slyfox/dev/git/gcc-mmix/../gcc-mmix-installed/mmix/lib/ -isystem
/home/slyfox/dev/git/gcc-mmix/../gcc-mmix-installed/mmix/include -isystem
/home/slyfox/dev/git/gcc-mmix/../gcc-mmix-installed/mmix/sys-include -g -O2
-mabi=gnu -O2 -g -O2 -DIN_GCC -DCROSS_DIRECTORY_STRUCTURE -W -Wall
-Wno-narrowing -Wwrite-strings -Wcast-qual -Wstrict-prototypes
-Wmissing-prototypes -Wold-style-definition -isystem ./include -mlibfuncs
-O2 -g -DIN_LIBGCC2 -fbuilding-libgcc -fno-stack-protector -mlibfuncs -O2 -I.
-I. -I../../.././gcc -I../../../../gcc/libgcc -I../../../../gcc/libgcc/.
-I../../../../gcc/libgcc/../gcc -I../../../../gcc/libgcc/../include
-DHAVE_CC_TLS -DUSE_EMUTLS -o _divdi3.o -MT _divdi3.o -MD -MP -MF _divdi3.dep
-DL_divdi3 -c ../../../../gcc/libgcc/libgcc2.c \
-fexceptions -fnon-call-exceptions
during RTL pass: expand
In file included from ../../../../gcc/libgcc/libgcc2.c:56:
../../../../gcc/libgcc/libgcc2.c: In function '__divti3':
../../../../gcc/libgcc/libgcc2.h:203:20: internal compiler error: in
leaf_function_p, at final.c:4488
#define __NDW(a,b) __ ## a ## ti ## b
^~
../../../../gcc/libgcc/libgcc2.h:274:18: note: in expansion of macro '__NDW'
#define __divdi3 __NDW(div,3)
^~~~~
../../../../gcc/libgcc/libgcc2.c:1231:1: note: in expansion of macro '__divdi3'
__divdi3 (DWtype u, DWtype v)
^~~~~~~~
0x7f724decda56 __libc_start_main
../csu/libc-start.c:308
Please submit a full bug report,
$ gcc/xgcc -v
Using built-in specs.
COLLECT_GCC=gcc/xgcc
Target: mmix
Configured with: ../gcc/configure --target=mmix
--prefix=/home/slyfox/dev/git/gcc-mmix/../gcc-mmix-installed
--with-sysroot=/usr/mmix --disable-bootstrap --enable-languages=c --disable-nls
--with-native-system-header-dir=/include CFLAGS=-O0 CXXFLAGS=-O0
Thread model: single
gcc version 9.0.0 20180505 (experimental) (GCC)
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Subject: [Bug target/85666] gcc-8.0.1 fails to build mmix target: gcc/libgcc/libgcc2.h:203:20: internal compiler error: in leaf_function_p, at final.c:4488
Date: Sat, 05 May 2018 22:28:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85666
--- Comment #1 from Sergei Trofimovich <slyfox at inbox dot ru> ---
looks like leaf_function_p() predicate fails right at start of cfgexpand when
it tries to pick stack frame size. leaf_function_p() has a few hints that it's
knowingly trying to do it before expand finishes:
Crash happens at:
https://github.com/gcc-mirror/gcc/blob/master/gcc/cfgexpand.c#L6630
static rtx_insn *
expand_used_vars (void)
{
tree var, outer_block = DECL_INITIAL (current_function_decl);
auto_vec<tree> maybe_local_decls;
rtx_insn *var_end_seq = NULL;
unsigned i;
unsigned len;
bool gen_stack_protect_signal = false;
/* Compute the phase of the stack frame for this function. */
{
int align = PREFERRED_STACK_BOUNDARY / BITS_PER_UNIT;
int off = targetm.starting_frame_offset () % align; /// <- here
frame_phase = off ? align - off : 0;
}
...
targetm.starting_frame_offset is
static HOST_WIDE_INT
mmix_starting_frame_offset (void)
{
return
(-8
+ (MMIX_CFUN_HAS_LANDING_PAD
-16 : (MMIX_CFUN_NEEDS_SAVED_EH_RETURN_ADDRESS ? -8 : 0))); // <- here
}
MMIX_CFUN_NEEDS_SAVED_EH_RETURN_ADDRESS triggers assertion:
https://github.com/gcc-mirror/gcc/blob/master/gcc/config/mmix/mmix.c#L61
#define MMIX_CFUN_NEEDS_SAVED_EH_RETURN_ADDRESS \
(flag_exceptions \
&& ((reload_completed && df_regs_ever_live_p (MMIX_rJ_REGNUM)) \
|| !leaf_function_p ())) /// <- here
>From gcc-bugs-return-603797-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 05 22:32:22 2018
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Subject: [Bug target/85666] gcc-8.0.1 fails to build mmix target: gcc/libgcc/libgcc2.h:203:20: internal compiler error: in leaf_function_p, at final.c:4488
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Sergei Trofimovich <slyfox at inbox dot ru> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |wdijkstr at arm dot com
--- Comment #2 from Sergei Trofimovich <slyfox at inbox dot ru> ---
Perhaps was introduced by this commit:
https://github.com/gcc-mirror/gcc/commit/6e0eb5c3537ca9a28f5580e5ef1f3d772f98d64e
"Add an assert to leaf_function_p to ensure it is not called from a prolog or
epilog sequence ..."
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug other/77609] __attribute__((section(".note.foo"))) forces SHT_PROGBITS though the assembler would use SHT_NOTE
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--- Comment #4 from roland at gcc dot gnu.org ---
Author: roland
Date: Sat May 5 23:35:25 2018
New Revision: 259969
URL: https://gcc.gnu.org/viewcvs?rev=259969&root=gcc&view=rev
Log:
PR other/77609: Let the assembler choose ELF section types for miscellaneous
named sections
gcc/
PR other/77609
* varasm.c (default_section_type_flags): Set SECTION_NOTYPE for
any section for which we don't know a specific type it should have,
regardless of name. Previously this was done only for the exact
names ".init_array", ".fini_array", and ".preinit_array".
(default_elf_asm_named_section): Add comment about
relationship with default_section_type_flags and SECTION_NOTYPE.
(get_section): Don't consider it a type conflict if one side has
SECTION_NOTYPE and the other doesn't, as long as neither has the
SECTION_BSS et al used in the default_section_type_flags logic.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/varasm.c
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From: "roland at gnu dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/85662] [8/9 Regression] "error: non-constant condition for static assertion" from __builtin_offsetof in C++
Date: Sun, 06 May 2018 00:02:00 -0000
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--- Comment #4 from roland at gnu dot org ---
That fix (applied to trunk) works for my test case and for the original
real-world case I reduced it from.
Will it be backported to 7 and 8?
Thanks for the quick work as usual, Jakub!
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Subject: [Bug libstdc++/80506] Wrong magic number in std::gamma_distribution
Date: Sun, 06 May 2018 00:59:00 -0000
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--- Comment #4 from emsr at gcc dot gnu.org ---
Created attachment 44079
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44079&action=edit
Patch for trunk and branch-8.
Ok, i was looking at backporting this and there are two more places in
gamma_distribution<_RealType>::
__generate_impl(_ForwardIterator __f, _ForwardIterator __t,
_UniformRandomNumberGenerator& __urng,
const param_type& __param)
where this same bit is pasted!
So I'll patch trunk on down.
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Subject: [Bug c/85664] Don't ask questions if tere's no way to answer
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--- Comment #2 from Mysha <gcc at mailed dot e4ward.com> ---
Well, Jonathan Wakely, I hear there's not enough love to go round.
But other than that: Yes, that is indeed one case of the compiler asking a
question where it shouldn't. And I like the approach of replacing it with
something like:
#include <foo.h> defines std::foo.
Indeed, I do have the impression that messages aren't as terse as they used to
be. Informative, but not really terse. And this would seem a nice short
alternative.
Another one case is the result from compiling program test.c:
inf main(){}
"
test.c:1:1: error: unknown type name ‘inf’; did you mean ‘int’?
inf main(){}
^~~
int
"
I don't know how many more unanswerable questions there are in GCC, but
reactions suggest that these informative messages with questions are not an
option, but rather the normal output. In that case, I'd rather have --terse;
just the error messages, not the informative additions. (I get a lot of these,
and with four lines per error I run our of console lines after some 17 typos.)
But for the direct case: While the other one also would like to see the wording
changed, that one is about the verbosity; what I'm after are the questions. If
there's no checksum in those files, I figure I can just hexedit them, but I'd
prefer a proper solution to that.
Bye
Mysha
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From: "green at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/85667] New: (x86_64) ms_abi rules aren't followed when returning short structs with float values
Date: Sun, 06 May 2018 01:21:00 -0000
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Bug ID: 85667
Summary: (x86_64) ms_abi rules aren't followed when returning
short structs with float values
Product: gcc
Version: 8.0.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
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Structs 8 bytes or shorter with floating point values should return in eax.
GCC 8.0.1 (at least) doesn't follow those rules. It is using the sysv ABI
rules instead.
See this code, for example:
typedef struct
{
float x;
} Float;
Float __attribute__((ms_abi)) fn1()
{
Float v;
v.x = 3.145;
return v;
}
Float fn2 ()
{
Float v;
v.x = 3.145;
return v;
}
GCC's output for fn1 and fn2 are similar:
fn1:
movss .LC0(%rip), %xmm0
ret
fn2:
movss .LC0(%rip), %xmm0
ret
Clang does this correctly, however, and fn1 looks like this:
fn1:
movl $1078544302, %eax
retq
fn2:
movss .LCPI1_0(%rip), %xmm0
retq
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Subject: [Bug target/85667] (x86_64) ms_abi rules aren't followed when returning short structs with float values
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Anthony Green <green at redhat dot com> changed:
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----------------------------------------------------------------------------
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>From gcc-bugs-return-603805-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 06 10:07:50 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/84890] Overly verbose notes for missing headers
Date: Sun, 06 May 2018 10:07:00 -0000
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
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CC| |gcc at mailed dot e4ward.com
--- Comment #7 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
*** Bug 85664 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-603804-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 06 10:07:50 2018
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Subject: [Bug c/85664] Don't ask questions if tere's no way to answer
Date: Sun, 06 May 2018 10:07:00 -0000
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
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--- Comment #3 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
(In reply to Mysha from comment #2)
> I don't know how many more unanswerable questions there are in GCC, but
> reactions suggest that these informative messages with questions are not an
> option, but rather the normal output. In that case, I'd rather have --terse;
> just the error messages, not the informative additions. (I get a lot of
> these, and with four lines per error I run our of console lines after some
> 17 typos.)
Removing the questions do not save lines.
The suggestions are eminently useful when one cannot immediately see the typo,
remember the right wording of a type, the right header and many other cases.
If you don't like getting too many errors or verbose output, you can use
-fmax-errors=1 -fno-diagnostics-show-caret -fno-diagnostics-show-option.
However, we have also bug reports asking for messages to be more verbose. One
of the often-repeated selling points of the "competition" is that they have
"expressive diagnostics", while GCC diagnostics are (were!) terse and cryptic.
There are many bug reports about making them even more verbose:
https://gcc.gnu.org/wiki/VerboseDiagnostics
If using the console for software development is too cumbersome, a better
alternative is to invoke gcc from an IDE such as Emacs, where you can jump from
error to error, jump to the code in question, and maybe apply the suggested fix
if you agree with it.
> But for the direct case: While the other one also would like to see the
> wording changed, that one is about the verbosity; what I'm after are the
> questions. If there's no checksum in those files, I figure I can just
> hexedit them, but I'd prefer a proper solution to that.
I would suggest that it would be easier to create a wrapper for gcc and use sed
or perl to filter the questions from the output. A simple regex should do the
job beautifully.
In any case, if you think a diagnostic could be better worded but no one else
seems interested in putting the effort to do it, then
https://gcc.gnu.org/wiki/GettingStarted#Basics:_Contributing_to_GCC_in_10_easy_steps
*** This bug has been marked as a duplicate of bug 84890 ***
>From gcc-bugs-return-603806-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 06 11:10:33 2018
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From: "vincent.lextrait at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/67650] undef reference with -fdevirtualize
Date: Sun, 06 May 2018 11:10:00 -0000
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--- Comment #31 from Vincent <vincent.lextrait at gmail dot com> ---
It turns out we might be in front of two bugs actually. With 8.1 I have a new
diagnosis for this 67650 bug (definition missing at compile time, not just at
link edition time), but I do have other parts of my old code where 8.1 is now
reporting missing definitions, and the definitions are there (definitions are
shown in the error message from 8.1 itself). And no virtuals are involved there
at all.
So either the old bug is now much more extensive, or there are two bugs now in
the same general "area".
>From gcc-bugs-return-603807-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 06 11:20:16 2018
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Subject: [Bug fortran/85507] [6/7/8/9 Regression] ICE in gfc_dep_resolver, at fortran/dependency.c:2258
Date: Sun, 06 May 2018 11:20:00 -0000
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--- Comment #16 from vehre at gcc dot gnu.org ---
Author: vehre
Date: Sun May 6 11:19:31 2018
New Revision: 259974
URL: https://gcc.gnu.org/viewcvs?rev=259974&root=gcc&view=rev
Log:
gcc/fortran/ChangeLog:
2018-05-06 Andre Vehreschild <vehre@gcc.gnu.org>
PR fortran/85507
* dependency.c (gfc_dep_resolver): Revert looking at coarray dimension
introduced by r259385.
* trans-intrinsic.c (conv_caf_send): Always report a dependency for
same variables in coarray assignments.
gcc/testsuite/ChangeLog:
2018-05-06 Andre Vehreschild <vehre@gcc.gnu.org>
PR fortran/85507
* gfortran.dg/coarray_dependency_1.f90: New test.
* gfortran.dg/coarray_lib_comm_1.f90: Fix counting caf-expressions.
Added:
trunk/gcc/testsuite/gfortran.dg/coarray_dependency_1.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/dependency.c
trunk/gcc/fortran/trans-intrinsic.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gfortran.dg/coarray_lib_comm_1.f90
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Subject: [Bug c/85664] Don't ask questions if tere's no way to answer
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--- Comment #4 from Mysha <gcc at mailed dot e4ward.com> ---
> The suggestions are eminently useful...
Which is why I said I would prefer to have a --terse option. After all, having
such an option implies that you can choose not to use them.
> If you don't like getting too many errors or verbose output, you can use
> -fmax-errors=1 -fno-diagnostics-show-caret -fno-diagnostics-show-option. ...
Great. It turns out the impression I got from the reactions to the two reports,
that there was no option to be terse, was mistaken. My trust in GCC is
restored. Thank you. (You know why I didn't know.)
> ... we have also bug reports asking for messages to be more verbose. ..."
It's OK to feel attacked. It's the same I feel for getting a reply about
something I didn't say, on a topic that wasn't even the focus of the report. I
wrote I would have "--terse" (or words to that effect), and only because I
understood that these informative extras were the only way, currently. I did
not write "I want GCC to be different for everybody because something the
developers considered a good thing doesn't always suit my particular
situation."
Right, we've now both defended ourselves. Let's continue on what I did write.
(And if you happen to be part of the European Youth Music Festival, let me know
where you are and we'll have a drink together.)
> Removing the questions do not save lines.
Indeed, which is why these two reports are related, but not duplicates.
>From gcc-bugs-return-603809-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 06 11:49:56 2018
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Subject: [Bug tree-optimization/85588] [6/7/8 Regression] -fwrapv miscompilation
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85588
Mikael Pettersson <mikpelinux at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mikpelinux at gmail dot com
--- Comment #7 from Mikael Pettersson <mikpelinux at gmail dot com> ---
(In reply to Richard Biener from comment #6)
> Fixed on trunk sofar.
I believe the fix was mistakenly labelled as PR85574 (including the file name
of the new test case).
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Subject: [Bug fortran/85507] [6/7/8/9 Regression] ICE in gfc_dep_resolver, at fortran/dependency.c:2258
Date: Sun, 06 May 2018 11:53:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85507
--- Comment #17 from vehre at gcc dot gnu.org ---
Author: vehre
Date: Sun May 6 11:52:46 2018
New Revision: 259977
URL: https://gcc.gnu.org/viewcvs?rev=259977&root=gcc&view=rev
Log:
gcc/fortran/ChangeLog:
2018-05-06 Andre Vehreschild <vehre@gcc.gnu.org>
PR fortran/85507
Backport from trunk.
* dependency.c (gfc_dep_resolver): Revert looking at coarray dimension
introduced by r259385.
* trans-intrinsic.c (conv_caf_send): Always report a dependency for
same variables in coarray assignments.
gcc/testsuite/ChangeLog:
2018-05-06 Andre Vehreschild <vehre@gcc.gnu.org>
PR fortran/85507
Backport from trunk
* gfortran.dg/coarray_dependency_1.f90: New test.
* gfortran.dg/coarray_lib_comm_1.f90: Fix counting caf-expressions.
Added:
branches/gcc-7-branch/gcc/testsuite/gfortran.dg/coarray_dependency_1.f90
Modified:
branches/gcc-7-branch/gcc/fortran/ChangeLog
branches/gcc-7-branch/gcc/fortran/dependency.c
branches/gcc-7-branch/gcc/fortran/trans-intrinsic.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
branches/gcc-7-branch/gcc/testsuite/gfortran.dg/coarray_lib_comm_1.f90
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From: "miguel.ojeda.sandonis at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/85668] New: ICE with substitution failure
Date: Sun, 06 May 2018 11:59:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85668
Bug ID: 85668
Summary: ICE with substitution failure
Product: gcc
Version: 8.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: miguel.ojeda.sandonis at gmail dot com
Target Milestone: ---
The following input causes an ICE starting with GCC 4.9 until trunk, on
-std=c++{14,17,2a}.
template <int>
using V = void;
template <typename F, typename T>
auto f1(F f, T v) -> decltype(f(v))
{
}
void f2(int p)
{
f1([](auto x) -> V<decltype(x)::y(p)> {}, 0);
}
GCC trunk reports:
x.cc: In substitution of 'template<class auto:1> f2(int)::<lambda(auto:1)>
[with auto:1 = int]':
x.cc:5:32: required by substitution of 'template<class F, class T>
decltype (f(v)) f1(F, T) [with F = f2(int)::<lambda(auto:1)>; T = int]'
x.cc:11:48: required from here
x.cc:11:39: internal compiler error: in tsubst_copy, at cp/pt.c:15325
f1([](auto x) -> V<decltype(x)::y(p)> {}, 0);
^
0x7a2545 tsubst_copy
../../gcc/gcc/cp/pt.c:15325
0x7a3c93 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*,
bool, bool)
../../gcc/gcc/cp/pt.c:18843
0x7a62eb tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*,
bool, bool)
../../gcc/gcc/cp/pt.c:18962
0x7a52bb tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*,
bool, bool)
../../gcc/gcc/cp/pt.c:18264
0x7990ee tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../gcc/gcc/cp/pt.c:17412
0x7bd710 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../gcc/gcc/cp/pt.c:11405
0x7bd710 tsubst_template_arg
../../gcc/gcc/cp/pt.c:11416
0x7c5eba tsubst_template_args
../../gcc/gcc/cp/pt.c:12440
0x7bb3e7 tsubst(tree_node*, tree_node*, int, tree_node*)
../../gcc/gcc/cp/pt.c:14604
0x7bb731 tsubst(tree_node*, tree_node*, int, tree_node*)
../../gcc/gcc/cp/pt.c:14221
0x7cd52c tsubst_function_type
../../gcc/gcc/cp/pt.c:13979
0x7bae75 tsubst(tree_node*, tree_node*, int, tree_node*)
../../gcc/gcc/cp/pt.c:14743
0x7c69dc tsubst_function_decl
../../gcc/gcc/cp/pt.c:12907
0x7ca178 tsubst_decl
../../gcc/gcc/cp/pt.c:13307
0x7bb417 tsubst(tree_node*, tree_node*, int, tree_node*)
../../gcc/gcc/cp/pt.c:14195
0x7b8afa instantiate_template_1
../../gcc/gcc/cp/pt.c:19215
0x7b8afa instantiate_template(tree_node*, tree_node*, int)
../../gcc/gcc/cp/pt.c:19271
0x7d1813 fn_type_unification(tree_node*, tree_node*, tree_node*, tree_node*
const*, unsigned int, tree_node*, unification_kind_t, int, bool, bool)
../../gcc/gcc/cp/pt.c:19633
0x601961 add_template_candidate_real
../../gcc/gcc/cp/call.c:3179
0x6025cb add_template_candidate
../../gcc/gcc/cp/call.c:3261
Live example:
https://godbolt.org/g/HNEuE8
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Subject: [Bug fortran/83606] [6/7/8 Regression] co-indexed array RHS yields incorrect result in assignment to vector-indexed LHS
Date: Sun, 06 May 2018 12:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83606
--- Comment #10 from vehre at gcc dot gnu.org ---
Author: vehre
Date: Sun May 6 12:14:11 2018
New Revision: 259978
URL: https://gcc.gnu.org/viewcvs?rev=259978&root=gcc&view=rev
Log:
gcc/fortran/ChangeLog:
2018-04-28 Andre Vehreschild <vehre@gcc.gnu.org>
PR fortran/81773
PR fortran/83606
Backport from trunk
* dependency.c (gfc_dep_resolver): Coarray indexes are to be ignored
during dependency computation. They define no data dependency.
* trans-array.c (conv_array_index_offset): The stride can not be set
here, prevent fail.
* trans-intrinsic.c (conv_caf_send): Add creation of temporary array
for caf_get's result and copying to the array with vectorial
indexing.
gcc/testsuite/ChangeLog:
2018-04-28 Andre Vehreschild <vehre@gcc.gnu.org>
PR fortran/81773
PR fortran/83606
Backport from trunk
* gfortran.dg/coarray/get_to_indexed_array_1.f90: New test.
* gfortran.dg/coarray/get_to_indirect_array.f90: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/gfortran.dg/coarray_dependency_1.f90
Modified:
branches/gcc-6-branch/gcc/fortran/ChangeLog
branches/gcc-6-branch/gcc/fortran/dependency.c
branches/gcc-6-branch/gcc/fortran/trans-intrinsic.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
branches/gcc-6-branch/gcc/testsuite/gfortran.dg/coarray_lib_comm_1.f90
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Subject: [Bug fortran/81773] [Coarray] Get with vector index on lhs leads to incorrect caf_get_by_ref() call.
Date: Sun, 06 May 2018 12:16:00 -0000
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--- Comment #9 from vehre at gcc dot gnu.org ---
Author: vehre
Date: Sun May 6 12:14:11 2018
New Revision: 259978
URL: https://gcc.gnu.org/viewcvs?rev=259978&root=gcc&view=rev
Log:
gcc/fortran/ChangeLog:
2018-04-28 Andre Vehreschild <vehre@gcc.gnu.org>
PR fortran/81773
PR fortran/83606
Backport from trunk
* dependency.c (gfc_dep_resolver): Coarray indexes are to be ignored
during dependency computation. They define no data dependency.
* trans-array.c (conv_array_index_offset): The stride can not be set
here, prevent fail.
* trans-intrinsic.c (conv_caf_send): Add creation of temporary array
for caf_get's result and copying to the array with vectorial
indexing.
gcc/testsuite/ChangeLog:
2018-04-28 Andre Vehreschild <vehre@gcc.gnu.org>
PR fortran/81773
PR fortran/83606
Backport from trunk
* gfortran.dg/coarray/get_to_indexed_array_1.f90: New test.
* gfortran.dg/coarray/get_to_indirect_array.f90: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/gfortran.dg/coarray_dependency_1.f90
Modified:
branches/gcc-6-branch/gcc/fortran/ChangeLog
branches/gcc-6-branch/gcc/fortran/dependency.c
branches/gcc-6-branch/gcc/fortran/trans-intrinsic.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
branches/gcc-6-branch/gcc/testsuite/gfortran.dg/coarray_lib_comm_1.f90
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Subject: [Bug fortran/83606] [6/7/8 Regression] co-indexed array RHS yields incorrect result in assignment to vector-indexed LHS
Date: Sun, 06 May 2018 12:23:00 -0000
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--- Comment #11 from vehre at gcc dot gnu.org ---
Author: vehre
Revision: 259978
Modified property: svn:log
Modified: svn:log at Sun May 6 12:20:52 2018
------------------------------------------------------------------------------
--- svn:log (original)
+++ svn:log Sun May 6 12:20:52 2018
@@ -1,25 +1,21 @@
gcc/fortran/ChangeLog:
-2018-04-28 Andre Vehreschild <vehre@gcc.gnu.org>
+2018-05-06 Andre Vehreschild <vehre@gcc.gnu.org>
- PR fortran/81773
- PR fortran/83606
- Backport from trunk
- * dependency.c (gfc_dep_resolver): Coarray indexes are to be ignored
- during dependency computation. They define no data dependency.
- * trans-array.c (conv_array_index_offset): The stride can not be set
- here, prevent fail.
- * trans-intrinsic.c (conv_caf_send): Add creation of temporary array
- for caf_get's result and copying to the array with vectorial
- indexing.
+ PR fortran/85507
+ Backport from trunk.
+ * dependency.c (gfc_dep_resolver): Revert looking at coarray dimension
+ introduced by r259385.
+ * trans-intrinsic.c (conv_caf_send): Always report a dependency for
+ same variables in coarray assignments.
gcc/testsuite/ChangeLog:
-2018-04-28 Andre Vehreschild <vehre@gcc.gnu.org>
+2018-05-06 Andre Vehreschild <vehre@gcc.gnu.org>
- PR fortran/81773
- PR fortran/83606
- Backport from trunk
- * gfortran.dg/coarray/get_to_indexed_array_1.f90: New test.
- * gfortran.dg/coarray/get_to_indirect_array.f90: New test.
+ PR fortran/85507
+ Backport from trunk.
+ * gfortran.dg/coarray_dependency_1.f90: New test.
+ * gfortran.dg/coarray_lib_comm_1.f90: Fix counting caf-expressions.
+
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Subject: [Bug fortran/81773] [Coarray] Get with vector index on lhs leads to incorrect caf_get_by_ref() call.
Date: Sun, 06 May 2018 12:23:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81773
--- Comment #10 from vehre at gcc dot gnu.org ---
Author: vehre
Revision: 259978
Modified property: svn:log
Modified: svn:log at Sun May 6 12:20:52 2018
------------------------------------------------------------------------------
--- svn:log (original)
+++ svn:log Sun May 6 12:20:52 2018
@@ -1,25 +1,21 @@
gcc/fortran/ChangeLog:
-2018-04-28 Andre Vehreschild <vehre@gcc.gnu.org>
+2018-05-06 Andre Vehreschild <vehre@gcc.gnu.org>
- PR fortran/81773
- PR fortran/83606
- Backport from trunk
- * dependency.c (gfc_dep_resolver): Coarray indexes are to be ignored
- during dependency computation. They define no data dependency.
- * trans-array.c (conv_array_index_offset): The stride can not be set
- here, prevent fail.
- * trans-intrinsic.c (conv_caf_send): Add creation of temporary array
- for caf_get's result and copying to the array with vectorial
- indexing.
+ PR fortran/85507
+ Backport from trunk.
+ * dependency.c (gfc_dep_resolver): Revert looking at coarray dimension
+ introduced by r259385.
+ * trans-intrinsic.c (conv_caf_send): Always report a dependency for
+ same variables in coarray assignments.
gcc/testsuite/ChangeLog:
-2018-04-28 Andre Vehreschild <vehre@gcc.gnu.org>
+2018-05-06 Andre Vehreschild <vehre@gcc.gnu.org>
- PR fortran/81773
- PR fortran/83606
- Backport from trunk
- * gfortran.dg/coarray/get_to_indexed_array_1.f90: New test.
- * gfortran.dg/coarray/get_to_indirect_array.f90: New test.
+ PR fortran/85507
+ Backport from trunk.
+ * gfortran.dg/coarray_dependency_1.f90: New test.
+ * gfortran.dg/coarray_lib_comm_1.f90: Fix counting caf-expressions.
+
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Subject: [Bug fortran/85507] [6/7/8/9 Regression] ICE in gfc_dep_resolver, at fortran/dependency.c:2258
Date: Sun, 06 May 2018 12:23:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85507
--- Comment #18 from vehre at gcc dot gnu.org ---
Author: vehre
Revision: 259978
Modified property: svn:log
Modified: svn:log at Sun May 6 12:20:52 2018
------------------------------------------------------------------------------
--- svn:log (original)
+++ svn:log Sun May 6 12:20:52 2018
@@ -1,25 +1,21 @@
gcc/fortran/ChangeLog:
-2018-04-28 Andre Vehreschild <vehre@gcc.gnu.org>
+2018-05-06 Andre Vehreschild <vehre@gcc.gnu.org>
- PR fortran/81773
- PR fortran/83606
- Backport from trunk
- * dependency.c (gfc_dep_resolver): Coarray indexes are to be ignored
- during dependency computation. They define no data dependency.
- * trans-array.c (conv_array_index_offset): The stride can not be set
- here, prevent fail.
- * trans-intrinsic.c (conv_caf_send): Add creation of temporary array
- for caf_get's result and copying to the array with vectorial
- indexing.
+ PR fortran/85507
+ Backport from trunk.
+ * dependency.c (gfc_dep_resolver): Revert looking at coarray dimension
+ introduced by r259385.
+ * trans-intrinsic.c (conv_caf_send): Always report a dependency for
+ same variables in coarray assignments.
gcc/testsuite/ChangeLog:
-2018-04-28 Andre Vehreschild <vehre@gcc.gnu.org>
+2018-05-06 Andre Vehreschild <vehre@gcc.gnu.org>
- PR fortran/81773
- PR fortran/83606
- Backport from trunk
- * gfortran.dg/coarray/get_to_indexed_array_1.f90: New test.
- * gfortran.dg/coarray/get_to_indirect_array.f90: New test.
+ PR fortran/85507
+ Backport from trunk.
+ * gfortran.dg/coarray_dependency_1.f90: New test.
+ * gfortran.dg/coarray_lib_comm_1.f90: Fix counting caf-expressions.
+
>From gcc-bugs-return-603817-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 06 12:34:09 2018
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Subject: [Bug fortran/85507] [6/7/8/9 Regression] ICE in gfc_dep_resolver, at fortran/dependency.c:2258
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85507
--- Comment #19 from vehre at gcc dot gnu.org ---
Author: vehre
Date: Sun May 6 12:33:07 2018
New Revision: 259979
URL: https://gcc.gnu.org/viewcvs?rev=259979&root=gcc&view=rev
Log:
gcc/fortran/ChangeLog:
2018-05-06 Andre Vehreschild <vehre@gcc.gnu.org>
PR fortran/85507
Backport from trunk.
* dependency.c (gfc_dep_resolver): Revert looking at coarray dimension
introduced by r259385.
* trans-intrinsic.c (conv_caf_send): Always report a dependency for
same variables in coarray assignments.
gcc/testsuite/ChangeLog:
2018-05-06 Andre Vehreschild <vehre@gcc.gnu.org>
PR fortran/85507
Backport from trunk.
* gfortran.dg/coarray_dependency_1.f90: New test.
* gfortran.dg/coarray_lib_comm_1.f90: Fix counting caf-expressions.
Added:
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/coarray_dependency_1.f90
Modified:
branches/gcc-8-branch/gcc/fortran/ChangeLog
branches/gcc-8-branch/gcc/fortran/dependency.c
branches/gcc-8-branch/gcc/fortran/trans-intrinsic.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/coarray_lib_comm_1.f90
>From gcc-bugs-return-603818-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 06 12:36:54 2018
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From: "dougmencken at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug regression/85669] New: fail on s-case-cfn-macros: build/gencfn-macros: DEF_INTERNAL_FLT_FN (%smth%) has no associated built-in functions
Date: Sun, 06 May 2018 12:36:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85669
Bug ID: 85669
Summary: fail on s-case-cfn-macros: build/gencfn-macros:
DEF_INTERNAL_FLT_FN (%smth%) has no associated
built-in functions
Product: gcc
Version: 8.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: regression
Assignee: unassigned at gcc dot gnu.org
Reporter: dougmencken at gmail dot com
Target Milestone: ---
I’m building gcc 8.1 release, and got
build/gencheck > tmp-check.h
/bin/sh ../../gcc-8.1.0/gcc/../move-if-change tmp-check.h tree-check.h
echo timestamp > s-check
build/gencfn-macros -c \
> tmp-case-cfn-macros.h
build/gencfn-macros: DEF_INTERNAL_FLT_FN (ACOS) has no associated built-in
functions
build/gencfn-macros: DEF_INTERNAL_FLT_FN (ASIN) has no associated built-in
functions
build/gencfn-macros: DEF_INTERNAL_FLT_FN (ATAN) has no associated built-in
functions
build/gencfn-macros: DEF_INTERNAL_FLT_FN (COS) has no associated built-in
functions
build/gencfn-macros: DEF_INTERNAL_FLT_FN (EXP) has no associated built-in
functions
build/gencfn-macros: DEF_INTERNAL_FLT_FN (EXP10) has no associated built-in
functions
build/gencfn-macros: DEF_INTERNAL_FLT_FN (EXP2) has no associated built-in
functions
build/gencfn-macros: DEF_INTERNAL_FLT_FN (EXPM1) has no associated built-in
functions
build/gencfn-macros: DEF_INTERNAL_FLT_FN (LOG) has no associated built-in
functions
build/gencfn-macros: DEF_INTERNAL_FLT_FN (LOG10) has no associated built-in
functions
build/gencfn-macros: DEF_INTERNAL_FLT_FN (LOG1P) has no associated built-in
functions
build/gencfn-macros: DEF_INTERNAL_FLT_FN (LOG2) has no associated built-in
functions
build/gencfn-macros: DEF_INTERNAL_FLT_FN (LOGB) has no associated built-in
functions
build/gencfn-macros: DEF_INTERNAL_FLT_FN (SIN) has no associated built-in
functions
build/gencfn-macros: DEF_INTERNAL_FLT_FN (SQRT) has no associated built-in
functions
build/gencfn-macros: DEF_INTERNAL_FLT_FN (TAN) has no associated built-in
functions
build/gencfn-macros: DEF_INTERNAL_FLT_FN (CEIL) has no associated built-in
functions
build/gencfn-macros: DEF_INTERNAL_FLT_FN (FLOOR) has no associated built-in
functions
build/gencfn-macros: DEF_INTERNAL_FLT_FN (RINT) has no associated built-in
functions
build/gencfn-macros: DEF_INTERNAL_FLT_FN (ROUND) has no associated built-in
functions
build/gencfn-macros: DEF_INTERNAL_FLT_FN (TRUNC) has no associated built-in
functions
build/gencfn-macros: DEF_INTERNAL_FLT_FN (ATAN2) has no associated built-in
functions
build/gencfn-macros: DEF_INTERNAL_FLT_FN (FMOD) has no associated built-in
functions
build/gencfn-macros: DEF_INTERNAL_FLT_FN (POW) has no associated built-in
functions
build/gencfn-macros: DEF_INTERNAL_FLT_FN (SCALB) has no associated built-in
functions
build/gencfn-macros: DEF_INTERNAL_FLT_FN (FMIN) has no associated built-in
functions
build/gencfn-macros: DEF_INTERNAL_FLT_FN (FMAX) has no associated built-in
functions
build/gencfn-macros: DEF_INTERNAL_FLT_FN (LDEXP) has no associated built-in
functions
build/gencfn-macros: DEF_INTERNAL_INT_FN (CLRSB) has no associated built-in
functions
build/gencfn-macros: DEF_INTERNAL_INT_FN (CLZ) has no associated built-in
functions
build/gencfn-macros: DEF_INTERNAL_INT_FN (CTZ) has no associated built-in
functions
build/gencfn-macros: DEF_INTERNAL_INT_FN (FFS) has no associated built-in
functions
build/gencfn-macros: DEF_INTERNAL_INT_FN (PARITY) has no associated built-in
functions
make[3]: *** [s-case-cfn-macros] Error 1
make[3]: *** Waiting for unfinished jobs....
rm gcc.pod
make[2]: *** [all-stage2-gcc] Error 2
make[1]: *** [stage2-bubble] Error 2
make: *** [all] Error 2
it is on stage2, stage1 was okay
>From gcc-bugs-return-603819-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 06 13:13:31 2018
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/85599] invalid optimization: function not always evaluated in logical expression
Date: Sun, 06 May 2018 13:13:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |WAITING
--- Comment #12 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
IMO the interpretation of 7.1.4 (10.1.4 in my F2018 draft) in comment 4
contradicts the note 7.28 (10.28) which explicitly states that L(Z) need not be
evaluated if X is greater than Y, i.e., check() here.
Evaluating
A = B .and. C
where A is a logical variable and B and C are logical variables, expressions,
..., as
if (B) then
A = C
else
A = .false.
end if
is not even an optimization.
I think this PR should be closed either as INVALID or a duplicate of pr57160.
>From gcc-bugs-return-603820-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 06 13:29:18 2018
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From: "lh_mouse at 126 dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/85670] New: `std::filesystem` does not compile on mingw-w64
Date: Sun, 06 May 2018 13:29:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85670
Bug ID: 85670
Summary: `std::filesystem` does not compile on mingw-w64
Product: gcc
Version: 8.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
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Created attachment 44080
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44080&action=edit
compiler errors
Compiling this simple code using `g++ -std=c++17 test.cc`:
```
#include <filesystem>
int main() {
std::filesystem::rename(std::filesystem::path("a"),
std::filesystem::path("b"));
}
```
results in a number of errors (attached).
The `no match for 'operator!='` error is caused by inline definition of `path&
operator/=(const path& __p)`, where the `operator!=()` has not been visible.
>From gcc-bugs-return-603821-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 06 13:41:25 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug regression/85669] fail on s-case-cfn-macros: build/gencfn-macros: DEF_INTERNAL_FLT/INT_FN (%smth%) has no associated built-in functions
Date: Sun, 06 May 2018 13:41:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85669
--- Comment #1 from Douglas Mencken <dougmencken at gmail dot com> ---
May this https://patchwork.ozlabs.org/patch/838856/ is related?
>From gcc-bugs-return-603822-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 06 13:43:40 2018
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From: "lh_mouse at 126 dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/85671] New: Lack of `std::move()` inside `operator/` for `std::filesystem::path`.
Date: Sun, 06 May 2018 13:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85671
Bug ID: 85671
Summary: Lack of `std::move()` inside `operator/` for
`std::filesystem::path`.
Product: gcc
Version: 8.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: lh_mouse at 126 dot com
Target Milestone: ---
In 'bits/fs_path.h' there is
```
/// Append one path to another
inline path operator/(const path& __lhs, const path& __rhs)
{ return path(__lhs) /= __rhs; }
```
Isn't this returning a copy of the unnamed object, because `operator/=` returns
an lvalue reference?
I think the operand of the return statement should be `move(path(__lhs) /=
__rhs)`.
>From gcc-bugs-return-603823-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 06 14:09:27 2018
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From: "roland.illig at gmx dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/85665] Multiple typos in diagnostics
Date: Sun, 06 May 2018 14:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85665
--- Comment #3 from Roland Illig <roland.illig at gmx dot de> ---
(In reply to Jonathan Wakely from comment #2)
> It might be better to report multiple bugs, one per target backend, so that
> the relevant target maintainers are informed.
Oh, I tried that last year. Of the 113 bugs I reported, 41 are still open.
Therefore I thought I'd try a different approach this time.
Since it's only about the wording of the diagnostics, it should be possible to
handle them all in a few commits, rather than splitting the work onto 12
people.
> To avoid similar problems in future, I wonder if a weekly email detailing
> any new or modified diagnostics could be produced automatically. The
> diagnostics maintainers (and anybody else interested) could look over it and
> ensure that we use correct grammar, punctuation, and style.
Does this mean you already have diagnostics maintainers? That would be bad
because then they should have caught many of these typos already. There were
only 53 new strings to translate, and 12 of them contain mistakes.
Instead of pushing this task to humans, I still think an automatic process is
much more efficient since it doesn't overlook the most commonly occurring
patterns. Having human proof readers in addition is nice, too. But having the
existing rules codified in a linter program is more important.
>From gcc-bugs-return-603824-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 06 15:02:35 2018
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Subject: [Bug libstdc++/85672] New: error: redefinition of 'constexpr long double std::abs(long double)'
Date: Sun, 06 May 2018 15:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85672
Bug ID: 85672
Summary: error: redefinition of 'constexpr long double
std::abs(long double)'
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
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Host: hppa2.0w-hp-hpux11.11
Target: hppa2.0w-hp-hpux11.11
Build: hppa2.0w-hp-hpux11.11
libtool: compile: /test/gnu/gcc/objdir/./gcc/xgcc -shared-libgcc
-B/test/gnu/gc
c/objdir/./gcc -nostdinc++
-L/test/gnu/gcc/objdir/hppa2.0w-hp-hpux11.11/libstdc+
+-v3/src -L/test/gnu/gcc/objdir/hppa2.0w-hp-hpux11.11/libstdc++-v3/src/.libs
-L/
test/gnu/gcc/objdir/hppa2.0w-hp-hpux11.11/libstdc++-v3/libsupc++/.libs
-B/opt/gn
u/gcc/gcc-9/hppa2.0w-hp-hpux11.11/bin/
-B/opt/gnu/gcc/gcc-9/hppa2.0w-hp-hpux11.1
1/lib/ -isystem /opt/gnu/gcc/gcc-9/hppa2.0w-hp-hpux11.11/include -isystem
/opt/g
nu/gcc/gcc-9/hppa2.0w-hp-hpux11.11/sys-include -fno-checking
-I/test/gnu/gcc/gcc
/libstdc++-v3/../libgcc
-I/test/gnu/gcc/objdir/hppa2.0w-hp-hpux11.11/libstdc++-v
3/include/hppa2.0w-hp-hpux11.11
-I/test/gnu/gcc/objdir/hppa2.0w-hp-hpux11.11/lib
stdc++-v3/include -I/test/gnu/gcc/gcc/libstdc++-v3/libsupc++ -D_GLIBCXX_SHARED
-
fno-implicit-templates -Wall -Wextra -Wwrite-strings -Wcast-qual -Wabi
-fdiagnos
tics-show-location=once -frandom-seed=atexit_thread.lo -g -O2 -c
../../../../gcc
/libstdc++-v3/libsupc++/atexit_thread.cc -fPIC -DPIC -D_GLIBCXX_SHARED -o
atexi
t_thread.o
In file included from
/test/gnu/gcc/objdir/hppa2.0w-hp-hpux11.11/libstdc++-v3/include/cstdlib:77,
from
../../../../gcc/libstdc++-v3/libsupc++/atexit_thread.cc:25:
/test/gnu/gcc/objdir/hppa2.0w-hp-hpux11.11/libstdc++-v3/include/bits/std_abs.h:102:3:
error: redefinition of 'constexpr long double std::abs(long double)'
abs(__float128 __x)
^~~
/test/gnu/gcc/objdir/hppa2.0w-hp-hpux11.11/libstdc++-v3/include/bits/std_abs.h:78:3:
note: 'constexpr long double std::abs(long double)' previously defined here
abs(long double __x)
^~~
In file included from
/test/gnu/gcc/objdir/hppa2.0w-hp-hpux11.11/libstdc++-v3/include/bits/move.h:55,
from
/test/gnu/gcc/objdir/hppa2.0w-hp-hpux11.11/libstdc++-v3/include/bits/nested_exception.h:40,
from /test/gnu/gcc/gcc/libstdc++-v3/libsupc++/exception:144,
from /test/gnu/gcc/gcc/libstdc++-v3/libsupc++/new:40,
from
../../../../gcc/libstdc++-v3/libsupc++/atexit_thread.cc:26:
/test/gnu/gcc/objdir/hppa2.0w-hp-hpux11.11/libstdc++-v3/include/type_traits:347:12:
error: redefinition of 'struct std::__is_floating_point_helper<long double>'
struct __is_floating_point_helper<__float128>
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/test/gnu/gcc/objdir/hppa2.0w-hp-hpux11.11/libstdc++-v3/include/type_traits:342:12:
note: previous definition of 'struct std::__is_floating_point_helper<long
double>'
struct __is_floating_point_helper<long double>
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>From gcc-bugs-return-603825-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 06 15:11:48 2018
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From: "dougmencken at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug regression/85669] fail on s-case-cfn-macros: build/gencfn-macros: DEF_INTERNAL_FLT/INT_FN (%smth%) has no associated built-in functions
Date: Sun, 06 May 2018 15:11:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85669
--- Comment #2 from Douglas Mencken <dougmencken at gmail dot com> ---
reverting of Michael’s patch gives
/Developer/GCC/7.3p/PowerPC/32bit/bin/g++ -std=gnu++98 -fno-PIE -c
-DIN_GCC_FRONTEND -DIN_GCC_FRONTEND -g -mdynamic-no-pic -DIN_GCC
-fno-exceptions -fno-rtti -fasynchronous-unwind-tables -W -Wall -Wno-narrowing
-Wwrite-strings -Wcast-qual -Wno-format -Wmissing-format-attribute
-Woverloaded-virtual -pedantic -Wno-long-long -Wno-variadic-macros
-Wno-overlength-strings -DHAVE_CONFIG_H -I. -I. -I../../gcc-8.1.0/gcc
-I../../gcc-8.1.0/gcc/. -I../../gcc-8.1.0/gcc/../include
-I../../gcc-8.1.0/gcc/../libcpp/include
-I/Volumes/hfsplushd/Development/gcc-toolchain/_gcc_boo/./gmp
-I/Volumes/hfsplushd/Development/gcc-toolchain/gcc-8.1.0/gmp
-I/Volumes/hfsplushd/Development/gcc-toolchain/_gcc_boo/./mpfr/src
-I/Volumes/hfsplushd/Development/gcc-toolchain/gcc-8.1.0/mpfr/src
-I/Volumes/hfsplushd/Development/gcc-toolchain/gcc-8.1.0/mpc/src
-I../../gcc-8.1.0/gcc/../libdecnumber -I../../gcc-8.1.0/gcc/../libdecnumber/dpd
-I../libdecnumber -I../../gcc-8.1.0/gcc/../libbacktrace
-I/Volumes/hfsplushd/Development/gcc-toolchain/_gcc_boo/./isl/include
-I/Volumes/hfsplushd/Development/gcc-toolchain/gcc-8.1.0/isl/include -o
attribs.o -MT attribs.o -MMD -MP -MF ./.deps/attribs.TPo
../../gcc-8.1.0/gcc/attribs.c
In file included from ../../gcc-8.1.0/gcc/target.h:51:0,
from ../../gcc-8.1.0/gcc/attribs.c:23:
./insn-codes.h:505:4: error: redefinition of 'CODE_FOR_floorkf2'
CODE_FOR_floorkf2 = CODE_FOR_nothing,
^~~~~~~~~~~~~~~~~
./insn-codes.h:497:4: note: 'CODE_FOR_floorkf2' previously defined here
CODE_FOR_floorkf2 = CODE_FOR_nothing,
^~~~~~~~~~~~~~~~~
./insn-codes.h:506:4: error: redefinition of 'CODE_FOR_floortf2'
CODE_FOR_floortf2 = CODE_FOR_nothing,
^~~~~~~~~~~~~~~~~
./insn-codes.h:498:4: note: 'CODE_FOR_floortf2' previously defined here
CODE_FOR_floortf2 = CODE_FOR_nothing,
^~~~~~~~~~~~~~~~~
./insn-codes.h:507:4: error: redefinition of 'CODE_FOR_ceilkf2'
CODE_FOR_ceilkf2 = CODE_FOR_nothing,
^~~~~~~~~~~~~~~~
./insn-codes.h:499:4: note: 'CODE_FOR_ceilkf2' previously defined here
CODE_FOR_ceilkf2 = CODE_FOR_nothing,
^~~~~~~~~~~~~~~~
./insn-codes.h:508:4: error: redefinition of 'CODE_FOR_ceiltf2'
CODE_FOR_ceiltf2 = CODE_FOR_nothing,
^~~~~~~~~~~~~~~~
./insn-codes.h:500:4: note: 'CODE_FOR_ceiltf2' previously defined here
CODE_FOR_ceiltf2 = CODE_FOR_nothing,
^~~~~~~~~~~~~~~~
./insn-codes.h:509:4: error: redefinition of 'CODE_FOR_btrunckf2'
CODE_FOR_btrunckf2 = CODE_FOR_nothing,
^~~~~~~~~~~~~~~~~~
./insn-codes.h:501:4: note: 'CODE_FOR_btrunckf2' previously defined here
CODE_FOR_btrunckf2 = CODE_FOR_nothing,
^~~~~~~~~~~~~~~~~~
./insn-codes.h:510:4: error: redefinition of 'CODE_FOR_btrunctf2'
CODE_FOR_btrunctf2 = CODE_FOR_nothing,
^~~~~~~~~~~~~~~~~~
./insn-codes.h:502:4: note: 'CODE_FOR_btrunctf2' previously defined here
CODE_FOR_btrunctf2 = CODE_FOR_nothing,
^~~~~~~~~~~~~~~~~~
./insn-codes.h:511:4: error: redefinition of 'CODE_FOR_roundkf2'
CODE_FOR_roundkf2 = CODE_FOR_nothing,
^~~~~~~~~~~~~~~~~
./insn-codes.h:503:4: note: 'CODE_FOR_roundkf2' previously defined here
CODE_FOR_roundkf2 = CODE_FOR_nothing,
^~~~~~~~~~~~~~~~~
./insn-codes.h:512:4: error: redefinition of 'CODE_FOR_roundtf2'
CODE_FOR_roundtf2 = CODE_FOR_nothing,
^~~~~~~~~~~~~~~~~
./insn-codes.h:504:4: note: 'CODE_FOR_roundtf2' previously defined here
CODE_FOR_roundtf2 = CODE_FOR_nothing,
^~~~~~~~~~~~~~~~~
In file included from ./tm.h:25:0,
from ../../gcc-8.1.0/gcc/target.h:52,
from ../../gcc-8.1.0/gcc/attribs.c:23:
./insn-flags.h: In function 'rtx_def* gen_floorkf2(rtx, rtx)':
./insn-flags.h:3484:1: error: redefinition of 'rtx_def* gen_floorkf2(rtx, rtx)'
gen_floorkf2(rtx ARG_UNUSED (a), rtx ARG_UNUSED (b))
^~~~~~~~~~~~
./insn-flags.h:3436:1: note: 'rtx_def* gen_floorkf2(rtx, rtx)' previously
defined here
gen_floorkf2(rtx ARG_UNUSED (a), rtx ARG_UNUSED (b))
^~~~~~~~~~~~
./insn-flags.h: In function 'rtx_def* gen_floortf2(rtx, rtx)':
./insn-flags.h:3490:1: error: redefinition of 'rtx_def* gen_floortf2(rtx, rtx)'
gen_floortf2(rtx ARG_UNUSED (a), rtx ARG_UNUSED (b))
^~~~~~~~~~~~
./insn-flags.h:3442:1: note: 'rtx_def* gen_floortf2(rtx, rtx)' previously
defined here
gen_floortf2(rtx ARG_UNUSED (a), rtx ARG_UNUSED (b))
^~~~~~~~~~~~
./insn-flags.h: In function 'rtx_def* gen_ceilkf2(rtx, rtx)':
./insn-flags.h:3496:1: error: redefinition of 'rtx_def* gen_ceilkf2(rtx, rtx)'
gen_ceilkf2(rtx ARG_UNUSED (a), rtx ARG_UNUSED (b))
^~~~~~~~~~~
./insn-flags.h:3448:1: note: 'rtx_def* gen_ceilkf2(rtx, rtx)' previously
defined here
gen_ceilkf2(rtx ARG_UNUSED (a), rtx ARG_UNUSED (b))
^~~~~~~~~~~
./insn-flags.h: In function 'rtx_def* gen_ceiltf2(rtx, rtx)':
./insn-flags.h:3502:1: error: redefinition of 'rtx_def* gen_ceiltf2(rtx, rtx)'
gen_ceiltf2(rtx ARG_UNUSED (a), rtx ARG_UNUSED (b))
^~~~~~~~~~~
./insn-flags.h:3454:1: note: 'rtx_def* gen_ceiltf2(rtx, rtx)' previously
defined here
gen_ceiltf2(rtx ARG_UNUSED (a), rtx ARG_UNUSED (b))
^~~~~~~~~~~
./insn-flags.h: In function 'rtx_def* gen_btrunckf2(rtx, rtx)':
./insn-flags.h:3508:1: error: redefinition of 'rtx_def* gen_btrunckf2(rtx,
rtx)'
gen_btrunckf2(rtx ARG_UNUSED (a), rtx ARG_UNUSED (b))
^~~~~~~~~~~~~
./insn-flags.h:3460:1: note: 'rtx_def* gen_btrunckf2(rtx, rtx)' previously
defined here
gen_btrunckf2(rtx ARG_UNUSED (a), rtx ARG_UNUSED (b))
^~~~~~~~~~~~~
./insn-flags.h: In function 'rtx_def* gen_btrunctf2(rtx, rtx)':
./insn-flags.h:3514:1: error: redefinition of 'rtx_def* gen_btrunctf2(rtx,
rtx)'
gen_btrunctf2(rtx ARG_UNUSED (a), rtx ARG_UNUSED (b))
^~~~~~~~~~~~~
./insn-flags.h:3466:1: note: 'rtx_def* gen_btrunctf2(rtx, rtx)' previously
defined here
gen_btrunctf2(rtx ARG_UNUSED (a), rtx ARG_UNUSED (b))
^~~~~~~~~~~~~
./insn-flags.h: In function 'rtx_def* gen_roundkf2(rtx, rtx)':
./insn-flags.h:3520:1: error: redefinition of 'rtx_def* gen_roundkf2(rtx, rtx)'
gen_roundkf2(rtx ARG_UNUSED (a), rtx ARG_UNUSED (b))
^~~~~~~~~~~~
./insn-flags.h:3472:1: note: 'rtx_def* gen_roundkf2(rtx, rtx)' previously
defined here
gen_roundkf2(rtx ARG_UNUSED (a), rtx ARG_UNUSED (b))
^~~~~~~~~~~~
./insn-flags.h: In function 'rtx_def* gen_roundtf2(rtx, rtx)':
./insn-flags.h:3526:1: error: redefinition of 'rtx_def* gen_roundtf2(rtx, rtx)'
gen_roundtf2(rtx ARG_UNUSED (a), rtx ARG_UNUSED (b))
^~~~~~~~~~~~
./insn-flags.h:3478:1: note: 'rtx_def* gen_roundtf2(rtx, rtx)' previously
defined here
gen_roundtf2(rtx ARG_UNUSED (a), rtx ARG_UNUSED (b))
^~~~~~~~~~~~
make[3]: *** [attribs.o] Error 1
make[2]: *** [all-stage1-gcc] Error 2
make[1]: *** [stage1-bubble] Error 2
make: *** [all] Error 2
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From: "asolokha at gmx dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/85673] New: ICE in create_pre_exit, at mode-switching.c:451
Date: Sun, 06 May 2018 16:12:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85673
Bug ID: 85673
Summary: ICE in create_pre_exit, at mode-switching.c:451
Product: gcc
Version: unknown
Status: UNCONFIRMED
Keywords: ice-checking, ice-on-invalid-code
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
Target: x86_64-unknown-linux-gnu
gcc-9.0.0-alpha20180429 snapshot (r259749), 8.1, 7.3, 6.3 all ICE when
compiling the following snippet w/ -mavx -O2 -fgcse-sm -fschedule-insns
-fselective-scheduling -fno-dce -fno-forward-propagate
-fno-rerun-cse-after-loop -fno-tree-dse -fno-tree-ter --param
selsched-max-lookahead=34:
int fn, l0, mo;
int
kg ();
int
pm (int *i2, int a8)
{
int v8;
a8 += kg ();
v8 = a8 < fn;
v8 = mo < v8;
v8 = v8 < i2;
v8 = mo < v8;
mo += v8;
a8 += l0;
l0 += a8;
for (fn = 0; fn < 1; ++fn)
{
}
for (mo = 0; mo < 1; ++mo)
{
}
return i2;
}
% x86_64-unknown-linux-gnu-gcc-9.0.0-alpha20180429 -mavx -O2 -fgcse-sm
-fschedule-insns -fselective-scheduling -fno-dce -fno-forward-propagate
-fno-rerun-cse-after-loop -fno-tree-dse -fno-tree-ter --param
selsched-max-lookahead=34 -w -c cyrbs0xx.c
during RTL pass: vzeroupper
cyrbs0xx.c: In function 'pm':
cyrbs0xx.c:29:1: internal compiler error: in create_pre_exit, at
mode-switching.c:451
}
^
0x7372b7 create_pre_exit
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180429/work/gcc-9-20180429/gcc/mode-switching.c:438
0x7372b7 optimize_mode_switching
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180429/work/gcc-9-20180429/gcc/mode-switching.c:534
0x7372b7 execute
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180429/work/gcc-9-20180429/gcc/mode-switching.c:892
0xfbc275 rest_of_handle_insert_vzeroupper
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180429/work/gcc-9-20180429/gcc/config/i386/i386.c:898
0xfbc275 execute
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180429/work/gcc-9-20180429/gcc/config/i386/i386.c:2518
>From gcc-bugs-return-603827-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 06 16:28:14 2018
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From: "thopre01 at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/85434] Address of stack protector guard spilled to stack on ARM
Date: Sun, 06 May 2018 16:28:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85434
--- Comment #11 from Thomas Preud'homme <thopre01 at gcc dot gnu.org> ---
I've started to work on a new patch according to review feedbacks. I've reached
the stage where I can compile without -fPIC with the stack protect test being
an UNSPEC split after register allocation as suggested.
Next steps are:
1) do the same for the stack protect set (ie setting the canari)
2) add support for PIC access to the guard
3) include the conditional branch in the combined stack protect test to ensure
the register holding the result of the comparison is not spilled before it's
used for the conditional branch
4) clear all registers involved before branching
5) cleanup the patch
>From gcc-bugs-return-603828-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 06 16:40:49 2018
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Subject: [Bug libstdc++/85672] error: redefinition of 'constexpr long double std::abs(long double)'
Date: Sun, 06 May 2018 16:40:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85672
--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
I think there is an inconsistency where we #define _GLIBCXX_USE_FLOAT128 0 (can
you check your c++config.h?) to say that it shouldn't be supported, but then
test with #ifdef and not #if.
>From gcc-bugs-return-603829-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 06 16:59:38 2018
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Subject: [Bug libstdc++/85672] error: redefinition of 'constexpr long double std::abs(long double)'
Date: Sun, 06 May 2018 16:59:00 -0000
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--- Comment #2 from John David Anglin <danglin at gcc dot gnu.org> ---
The config file looks like this:
/* Define if __float128 is supported on this host. */
# define _GLIBCXX_USE_FLOAT128 0
#if !defined(__FLOAT128__) && !defined(__SIZEOF_FLOAT128__)
#undef _GLIBCXX_USE_FLOAT128
#endif
I think __FLOAT128__ and __SIZEOF_FLOAT128__ are defined because we have:
/* Under HPUX, the __float128 type is a synonym for "long double". */
(*lang_hooks.types.register_builtin_type) (long_double_type_node,
"__float128");
>From gcc-bugs-return-603830-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 06 19:02:01 2018
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From: "amonakov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/85673] ICE in create_pre_exit, at mode-switching.c:451
Date: Sun, 06 May 2018 19:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85673
Alexander Monakov <amonakov at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-05-06
CC| |abel at gcc dot gnu.org,
| |amonakov at gcc dot gnu.org
Blocks| |84301
Assignee|unassigned at gcc dot gnu.org |amonakov at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
PR 84301 is related (not backported to 6/7 so failure is expected there).
The fix was incomplete because 'cant_move' insn flag only restricts inter-block
motion (argh!), so sel-sched is still free to move %eax assignment up. Oops.
Perhaps we can additionally set sched_group_p in add_branch_dependences for
pre-RA sel-sched to ensure insns stay at the end of basic block; after reload
that would also pin mutex_p cond-exec insns to BB end as well.
(apropos: flag_sched_group_heuristic should be removed, the way it's used in
rank_for_schedule is not a heuristic, but a correctness requirement)
Overall I'm concerned that mode-switching is making unreasonable assumptions,
if it really needs that some insns stay in sequence just before function
return, they should be arranged to have a barrier insn or SCHED_GROUP_P from
the beginning. So maybe it's better to adjust mode-switching instead, but
unfortunately it's not quite obvious how it works :)
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84301
[Bug 84301] [6/7 Regression] ICE in create_pre_exit, at mode-switching.c:451
>From gcc-bugs-return-603831-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 06 20:19:31 2018
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Subject: [Bug c/85664] Don't ask questions if there's no way to answer
Date: Sun, 06 May 2018 20:19:00 -0000
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ebotcazou at gcc dot gnu.org
Summary|Don't ask questions if |Don't ask questions if
|tere's no way to answer |there's no way to answer
--- Comment #5 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Not all questions are meant to elicit an answer though. That being said, it
would be interesting to know whether other compilers (or text processors) do
it.
>From gcc-bugs-return-603832-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 06 21:15:59 2018
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Subject: [Bug c++/85659] [6/7/8/9 Regression] ICE with inline assembly inside virtual function
Date: Sun, 06 May 2018 21:15:00 -0000
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Sun May 6 21:14:35 2018
New Revision: 259981
URL: https://gcc.gnu.org/viewcvs?rev=259981&root=gcc&view=rev
Log:
PR c++/85659
* cfgexpand.c (expand_asm_stmt): Don't create a temporary if
the type is addressable. Don't force op into register if it has
BLKmode.
* g++.dg/ext/asm14.C: New test.
* g++.dg/ext/asm15.C: New test.
* g++.dg/ext/asm16.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/ext/asm14.C
trunk/gcc/testsuite/g++.dg/ext/asm15.C
trunk/gcc/testsuite/g++.dg/ext/asm16.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/cfgexpand.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/85659] [6/7/8/9 Regression] ICE with inline assembly inside virtual function
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85659
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Sun May 6 21:52:25 2018
New Revision: 259982
URL: https://gcc.gnu.org/viewcvs?rev=259982&root=gcc&view=rev
Log:
PR c++/85659
* cfgexpand.c (expand_asm_stmt): Don't create a temporary if
the type is addressable. Don't force op into register if it has
BLKmode.
* g++.dg/ext/asm14.C: New test.
* g++.dg/ext/asm15.C: New test.
* g++.dg/ext/asm16.C: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/g++.dg/ext/asm14.C
branches/gcc-8-branch/gcc/testsuite/g++.dg/ext/asm15.C
branches/gcc-8-branch/gcc/testsuite/g++.dg/ext/asm16.C
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/cfgexpand.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-603834-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 05:10:21 2018
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From: "asolokha at gmx dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/85674] New: ICE insn_min_length, at config/rs6000/rs6000.md:6661
Date: Mon, 07 May 2018 05:10:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85674
Bug ID: 85674
Summary: ICE insn_min_length, at config/rs6000/rs6000.md:6661
Product: gcc
Version: unknown
Status: UNCONFIRMED
Keywords: ice-on-invalid-code
Severity: normal
Priority: P3
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Reporter: asolokha at gmx dot com
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Target: powerpc-*-linux-gnu
gcc-9.0.0-alpha20180429 snapshot (r259749) ICEs when compiling the following
snippet w/ -mcpu=e300c3 (=e300c2) -misel -O1 -fcrossjumping -frename-registers
-fschedule-insns2 -fsel-sched-pipelining -fselective-scheduling2 -fsplit-paths
-fstrict-aliasing -ftrapv -ftree-vrp -fno-move-loop-invariants
-fno-reorder-blocks -fno-tree-ccp --param max-jump-thread-duplication-stmts=30
--param selsched-max-lookahead=19:
signed char v9;
short int hw;
long long int k1;
void
d2 (void)
{
short int *z4 = &k1;
unsigned short int *ur = hw;
unsigned short int gx = *z4 == (z4 = ur);
hw /= 3;
k1 += hw;
for (hw = 1; hw < 4; ++hw)
{
unsigned short int nk;
unsigned int xx;
int mj;
int ys;
nk = gx | -2;
nk = nk > !!hw;
xx = !!gx ? gx : 0x10000;
mj = nk * xx;
ys = *z4 * gx * 2;
gx += ys <= *z4;
v9 += mj / gx;
}
for (;;)
{
}
}
% powerpc-e300c3-linux-gnu-gcc-9.0.0-alpha20180429 -mcpu=e300c3 -misel -O1
-fcrossjumping -frename-registers -fschedule-insns2 -fsel-sched-pipelining
-fselective-scheduling2 -fsplit-paths -fstrict-aliasing -ftrapv -ftree-vrp
-fno-move-loop-invariants -fno-reorder-blocks -fno-tree-ccp --param
max-jump-thread-duplication-stmts=30 --param selsched-max-lookahead=19 -w -c
i8eydx17.c
i8eydx17.c: In function 'd2':
i8eydx17.c:34:1: error: unrecognizable insn:
}
^
(insn 211 72 61 (set (reg:CCUNS 73 5 [199])
(reg:CCUNS 69 1 [227])) "i8eydx17.c":25 -1
(nil))
during RTL pass: shorten
i8eydx17.c:34:1: internal compiler error: in insn_min_length, at
config/rs6000/rs6000.md:6661
0x556184 _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20180429/work/gcc-9-20180429/gcc/rtl-error.c:108
0x5561c4 _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20180429/work/gcc-9-20180429/gcc/rtl-error.c:116
0x120cfdd insn_min_length(rtx_insn*)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20180429/work/gcc-9-20180429/gcc/config/rs6000/rs6000.md:6661
0x896b4d shorten_branches(rtx_insn*)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20180429/work/gcc-9-20180429/gcc/final.c:1190
0x8970a2 rest_of_handle_shorten_branches
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20180429/work/gcc-9-20180429/gcc/final.c:4764
0x8970a2 execute
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20180429/work/gcc-9-20180429/gcc/final.c:4793
>From gcc-bugs-return-603835-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 08:11:36 2018
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Subject: [Bug c++/25751] Poor error when templating on undefined types
Date: Mon, 07 May 2018 08:11:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |NEW
Assignee|paolo.carlini at oracle dot com |unassigned at gcc dot gnu.org
--- Comment #4 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Not actively working on it.
>From gcc-bugs-return-603836-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 08:46:51 2018
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Subject: [Bug ada/85638] [8/9 regression] build failure for Ada runtime with SJLJ exceptions on x86
Date: Mon, 07 May 2018 08:46:00 -0000
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #44066|0 |1
is obsolete| |
--- Comment #13 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Created attachment 44081
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44081&action=edit
Tentative fix v2
To be tested.
>From gcc-bugs-return-603837-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 08:47:07 2018
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From: "tkoenig at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/85599] Function need not be evaluated in logical expression
Date: Mon, 07 May 2018 08:47:00 -0000
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |NEW
Component|fortran |middle-end
Summary|invalid optimization: |Function need not be
|function not always |evaluated in logical
|evaluated in logical |expression
|expression |
--- Comment #13 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
In the original test case, it is not necessary to evaluate
the function at all. A function evaluation should always be
cheaper than just checking a variable. Constant propagation
would then eliminate all of the test case, leading only
to the effect of
flag = .false.
As a more realistic example, one should change
subroutine foo(a,b)
logical, intent(in) :: a
logical, intent(out) :: b
b = func() .and. a
end subroutine foo
to
subroutine foo(a,b)
logical, intent(in) :: a
logical, intent(out) :: b
if (a) then
b = func()
else
b = .false.
end if
end subroutine
We are passing TRUTH_AND_EXPR to the middle end to allow such
optimizations. Is there something in the semantics of TRUTH_AND_EXPR
(for example needed for other languages) that says that the
function check() needs to be called? Or is this simply some
optimization opportunity that is currently not taken?
>From gcc-bugs-return-603838-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 09:28:47 2018
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From: "daanvanvugt at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/85675] New: parameters from other modules in openmp default(none) not specified in enclosing 'parallel'
Date: Mon, 07 May 2018 09:28:00 -0000
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Bug ID: 85675
Summary: parameters from other modules in openmp default(none)
not specified in enclosing 'parallel'
Product: gcc
Version: 7.3.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
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I have been experiencing an issue (for a few versions already) related to
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59488
but in the case where the parameter is imported from a module in a different
source file.
c.f90:
module c
integer, parameter :: n = 100
integer, parameter :: ns(n) = 0
end module c
test.f90:
program test
use c
implicit none
integer :: i
!$omp parallel do default(none) private(i)
do i=1,n
write(*,*) ns(i)
end do
!$omp end parallel do
end program test
gfortran -fopenmp -c c.f90
gfortran -fopenmp -c test.f90
test.f90:8:0:
write(*,*) ns(i)
Error: ‘ns’ not specified in enclosing ‘parallel’
test.f90:6:0:
!$omp parallel do default(none) private(i)
Error: enclosing ‘parallel’
>From gcc-bugs-return-603839-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 09:52:03 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/85638] [8/9 regression] build failure for Ada runtime with SJLJ exceptions on x86
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|ada |rtl-optimization
--- Comment #14 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Recategorizing.
>From gcc-bugs-return-603840-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 11:09:38 2018
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Subject: [Bug c/85676] New: Obsolete function declarations should have warnings by default
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85676
Bug ID: 85676
Summary: Obsolete function declarations should have warnings by
default
Product: gcc
Version: unknown
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Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
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There are a number of features of C that are still legal code even in C11, but
have been obsolete for many generations of C because they are unnecessary and
have a high risk of errors. gcc has to be able to support old code, but it is
perfectly valid to give warnings on such old code.
A prime example is non-prototype function declarations, such as "void foo()".
This has been obsolete since C89, almost 30 years ago, yet if you have:
// a.c
void foo();
gcc -std=c11 -Wall -Wextra -pedantic -c a.c
it compiles without warning. You need "-Wstrict-prototypes" to get a warning.
Surely this warning ought to be part of -Wall, or enabled by default when a C11
or C99 standard is chosen?
The same applies to K&R style function definitions.
>From gcc-bugs-return-603841-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 11:25:03 2018
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Subject: [Bug testsuite/85677] New: [openacc] gomp-constants.h not available in installed testing of libgomp
Date: Mon, 07 May 2018 11:25:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85677
Bug ID: 85677
Summary: [openacc] gomp-constants.h not available in installed
testing of libgomp
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Version: 9.0
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I've added quite a few "#include <gomp-constants.h>" to libgomp openacc
testcases in r259850.
That worked fine for buildarea testing, but broke those test-cases for
installed testing.
In the build-area testing setup, the compiler can find gomp-constants.h because
in libgomp.exp we find:
...
if { $blddir != "" } {
...
# The top-level include directory, for gomp-constants.h.
lappend ALWAYS_CFLAGS "additional_flags=-I${srcdir}/../../include"
}
...
but this line is not active for installed testing.
>From gcc-bugs-return-603842-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 11:26:03 2018
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Subject: [Bug c/85678] New: -fno-common should be default
Date: Mon, 07 May 2018 11:26:00 -0000
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Bug ID: 85678
Summary: -fno-common should be default
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The use of a "common" section to match up tentative object definitions in
different translation units in a program is contrary to the C standards
(section 6.9p5 in C99 and C11, section 6.7 in C90), gives a high risk of error,
may lead to poorer quality code, and provides no benefits except backwards
compatibility with ancient code.
Unix C compilers have traditionally allowed "int x;" in file a.c to be
allocated by the linker to the same storage as "int x;" in file b.c when these
two C files are linked together. gcc supports this if "-fcommon" is enabled,
which is the default on most targets. But it is contrary to the C (and C++)
standards that say there shall be exactly /one/ definition of each object. And
it is very easy to have errors in code by accidentally having duplicate names
in different files (if the programmer has not used "static"), perhaps even of
different types. With "-fno-common", such errors are caught at link time.
Also, data in common sections will hinder some types of optimisation, such as
"-fsection-anchors".
Surely it is time to make "-fno-common" the default, at least when a modern C
standard is specified indicating that the code is modern? People who need the
old behaviour can always get it with "-fcommon".
>From gcc-bugs-return-603843-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 11:34:22 2018
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Subject: [Bug testsuite/85677] [openacc] gomp-constants.h not available in installed testing of libgomp
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85677
--- Comment #1 from Tom de Vries <vries at gcc dot gnu.org> ---
Author: vries
Date: Mon May 7 11:33:45 2018
New Revision: 259992
URL: https://gcc.gnu.org/viewcvs?rev=259992&root=gcc&view=rev
Log:
[openacc, testsuite] Allow installed testing of libgomp to find
gomp-constants.h
2018-05-07 Tom de Vries <tom@codesourcery.com>
PR testsuite/85677
* testsuite/lib/libgomp.exp (libgomp_init): Move inclusion of top-level
include directory in ALWAYS_CFLAGS out of $blddir != "" condition.
Modified:
trunk/libgomp/ChangeLog
trunk/libgomp/testsuite/lib/libgomp.exp
>From gcc-bugs-return-603844-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 11:39:39 2018
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Subject: [Bug testsuite/85677] [openacc] gomp-constants.h not available in installed testing of libgomp
Date: Mon, 07 May 2018 11:39:00 -0000
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Tom de Vries <vries at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
Assignee|unassigned at gcc dot gnu.org |vries at gcc dot gnu.org
Target Milestone|--- |9.0
--- Comment #2 from Tom de Vries <vries at gcc dot gnu.org> ---
Patch committed, marking resolved-fixed.
>From gcc-bugs-return-603845-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 12:13:23 2018
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Subject: [Bug libstdc++/85671] Lack of `std::move()` inside `operator/` for `std::filesystem::path`.
Date: Mon, 07 May 2018 12:13:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-05-07
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Ever confirmed|0 |1
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
It would be better to do:
path __tmp(__lhs);
__tmp /= __rhs;
return __tmp;
That allows a copy to be elided.
>From gcc-bugs-return-603846-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 12:16:05 2018
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Subject: [Bug libstdc++/85672] [9 Regression] error: redefinition of 'constexpr long double std::abs(long double)'
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What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-05-07
Summary|error: redefinition of |[9 Regression] error:
|'constexpr long double |redefinition of 'constexpr
|std::abs(long double)' |long double std::abs(long
| |double)'
Ever confirmed|0 |1
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Yes it woud have been broken by r259813 and this should fix it:
--- a/libstdc++-v3/include/std/type_traits
+++ b/libstdc++-v3/include/std/type_traits
@@ -342,7 +342,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
struct __is_floating_point_helper<long double>
: public true_type { };
-#if !defined(__STRICT_ANSI__) && defined(_GLIBCXX_USE_FLOAT128)
+#if !defined(__STRICT_ANSI__) && _GLIBCXX_USE_FLOAT128
template<>
struct __is_floating_point_helper<__float128>
: public true_type { };
>From gcc-bugs-return-603847-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 12:23:53 2018
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Subject: [Bug c++/85679] New: __is_trivially_copyable returns false with volatile scalar type
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Bug ID: 85679
Summary: __is_trivially_copyable returns false with volatile
scalar type
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__is_trivially_copyable builtin returns true on volatile-qualified trivially
copyable class, or array of the class as expected. But not for
volatile-qualified scalar type, such as `int volatile`.
n4741 6.7 [basic.types] p.9 says:
> Cv-unqualified scalar types, trivially copyable class types (Clause 12),
> arrays of such types, and cv-qualified versions of these types are collectively
> called trivially copyable types.
i.e. following code should be compiled.
----
struct S{};
static_assert(__is_trivially_copyable(S volatile));
static_assert(__is_trivially_copyable(S volatile[]));
static_assert(__is_trivially_copyable(S const volatile));
static_assert(__is_trivially_copyable(S const volatile[]));
static_assert(__is_trivially_copyable(int volatile));
static_assert(__is_trivially_copyable(int volatile[]));
static_assert(__is_trivially_copyable(int const volatile));
static_assert(__is_trivially_copyable(int const volatile[]));
----
https://wandbox.org/permlink/IZ7eCzSFGeSujJPx
See also:
- http://wg21.link/cwg496
- http://wg21.link/cwg1746
- http://wg21.link/cwg2094
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Subject: [Bug libstdc++/85672] [9 Regression] error: redefinition of 'constexpr long double std::abs(long double)'
Date: Mon, 07 May 2018 12:25:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85672
--- Comment #4 from Marc Glisse <glisse at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #3)
> Yes it woud have been broken by r259813 and this should fix it:
I don't think that's sufficient:
- the same code is present in several files
- -Wsystem-headers -Wundef will warn
- it still leaves a weird situation where _GLIBCXX_USE_FLOAT128 may be 1, 0 or
undefined, instead of just 2 choices.
>From gcc-bugs-return-603849-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 12:39:17 2018
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Subject: [Bug libstdc++/85672] [9 Regression] error: redefinition of 'constexpr long double std::abs(long double)'
Date: Mon, 07 May 2018 12:39:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85672
--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Marc Glisse from comment #4)
> (In reply to Jonathan Wakely from comment #3)
> > Yes it woud have been broken by r259813 and this should fix it:
>
> I don't think that's sufficient:
> - the same code is present in several files
Only two.
include/bits/std_abs.h and include/std/type_traits
> - -Wsystem-headers -Wundef will warn
That's the status quo. It would take a ton of effort to avoid -Wundef warnings
in libstdc++ and that's not something I'm going to work on.
> - it still leaves a weird situation where _GLIBCXX_USE_FLOAT128 may be 1, 0
> or undefined, instead of just 2 choices.
Ah yes, good point. So we could either change include/Makefile.am to #undef it
instead of setting it to 0, or do:
--- a/libstdc++-v3/include/bits/c++config
+++ b/libstdc++-v3/include/bits/c++config
@@ -611,7 +611,10 @@ namespace std
/* Define if __float128 is supported on this host. */
#define _GLIBCXX_USE_FLOAT128
-#if !defined(__FLOAT128__) && !defined(__SIZEOF_FLOAT128__)
+#if _GLIBCXX_USE_FLOAT128 == 0
+#undef _GLIBCXX_USE_FLOAT128
+#endif
+#elif !defined(__FLOAT128__) && !defined(__SIZEOF_FLOAT128__)
#undef _GLIBCXX_USE_FLOAT128
#endif
I think I'd prefer to change include/Makefile.am
Then no changes to <bits/std_abs.h> and <type_traits> would be needed.
>From gcc-bugs-return-603850-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 12:41:38 2018
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Subject: [Bug libstdc++/85670] `std::filesystem` does not compile on mingw-w64
Date: Mon, 07 May 2018 12:41:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Thanks. I plan to add MinGW support for filesystem in the next week or two, so
this is useful.
>From gcc-bugs-return-603851-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 12:49:40 2018
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Subject: [Bug libstdc++/85672] [9 Regression] error: redefinition of 'constexpr long double std::abs(long double)'
Date: Mon, 07 May 2018 12:49:00 -0000
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--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #5)
> (In reply to Marc Glisse from comment #4)
> > - -Wsystem-headers -Wundef will warn
>
> That's the status quo. It would take a ton of effort to avoid -Wundef
> warnings in libstdc++ and that's not something I'm going to work on.
In other words, don't use -Wsystem-headers -Wundef
>From gcc-bugs-return-603852-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 13:03:26 2018
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Subject: [Bug libstdc++/85672] [9 Regression] error: redefinition of 'constexpr long double std::abs(long double)'
Date: Mon, 07 May 2018 13:03:00 -0000
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--- Comment #7 from Marc Glisse <glisse at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #5)
> > - -Wsystem-headers -Wundef will warn
>
> That's the status quo. It would take a ton of effort to avoid -Wundef
> warnings in libstdc++ and that's not something I'm going to work on.
I was only listing it as a way to introduce the next point, you can forget it.
> > - it still leaves a weird situation where _GLIBCXX_USE_FLOAT128 may be 1, 0
> > or undefined, instead of just 2 choices.
>
> Ah yes, good point. So we could either change include/Makefile.am to #undef
> it instead of setting it to 0, or do:
>
> --- a/libstdc++-v3/include/bits/c++config
> +++ b/libstdc++-v3/include/bits/c++config
> @@ -611,7 +611,10 @@ namespace std
>
> /* Define if __float128 is supported on this host. */
> #define _GLIBCXX_USE_FLOAT128
> -#if !defined(__FLOAT128__) && !defined(__SIZEOF_FLOAT128__)
> +#if _GLIBCXX_USE_FLOAT128 == 0
> +#undef _GLIBCXX_USE_FLOAT128
> +#endif
> +#elif !defined(__FLOAT128__) && !defined(__SIZEOF_FLOAT128__)
> #undef _GLIBCXX_USE_FLOAT128
> #endif
>
>
> I think I'd prefer to change include/Makefile.am
>
> Then no changes to <bits/std_abs.h> and <type_traits> would be needed.
Yes, or maybe don't generate #define _GLIBCXX_USE_FLOAT128 0 but instead /*
#undef _GLIBCXX_USE_FLOAT128 */ as we used to do and as the rest of the
c++config.h file does. Actually, I am not sure why r259813 needed to change so
many things...
>From gcc-bugs-return-603853-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 14:41:50 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/85671] Lack of `std::move()` inside `operator/` for `std::filesystem::path`.
Date: Mon, 07 May 2018 14:41:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85671
--- Comment #2 from Liu Hao <lh_mouse at 126 dot com> ---
在 2018/5/7 20:13, redi at gcc dot gnu.org 写道:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85671
>
> Jonathan Wakely <redi at gcc dot gnu.org> changed:
>
> What |Removed |Added
> ----------------------------------------------------------------------------
> Status|UNCONFIRMED |ASSIGNED
> Last reconfirmed| |2018-05-07
> Assignee|unassigned at gcc dot gnu.org |redi at gcc dot gnu.org
> Ever confirmed|0 |1
>
> --- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
> It would be better to do:
>
> path __tmp(__lhs);
> __tmp /= __rhs;
> return __tmp;
>
> That allows a copy to be elided.
>
There is no difference in implementation as long as NRVO is in effect.
>From gcc-bugs-return-603854-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 14:52:16 2018
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Subject: [Bug c++/85680] New: Missed optimization for value-init of variable-sized allocation
Date: Mon, 07 May 2018 14:52:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85680
Bug ID: 85680
Summary: Missed optimization for value-init of variable-sized
allocation
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: redbeard0531 at gmail dot com
Target Milestone: ---
https://godbolt.org/g/6yZEKf (compiled with -O3)
char* variableSize(long n) {
auto p = new char[n]();
for (int i = 0; i < n; i++) {
p[i] = 0xff;
}
return p;
}
char* small() {
return variableSize(8);
}
char* large() {
return variableSize(10'000);
}
The variableSize() case generates two calls two memset with the both being
conditional on n > 0 if I'm reading this right), but the two checks are done in
different ways. That may be a second optimizer bug that it missed a
jump-threading opportunity.
variableSize(long):
push rbx
mov rbx, rdi
call operator new[](unsigned long)
mov rcx, rax
mov rax, rbx
sub rax, 1
js .L5
lea rax, [rbx-2]
mov edx, 1
mov rdi, rcx
cmp rax, -1
cmovge rdx, rbx
xor esi, esi
call memset
mov rcx, rax
.L5:
test rbx, rbx
jle .L1
mov rdi, rcx
mov rdx, rbx
mov esi, 255
call memset
mov rcx, rax
.L1:
mov rax, rcx
pop rbx
ret
Note that when g++ can see the allocation size it *does* elide the initial
memset:
small(): # @small()
push rax
mov edi, 8
call operator new[](unsigned long)
mov qword ptr [rax], -1
pop rcx
ret
large(): # @large()
push rbx
mov edi, 10000
call operator new[](unsigned long)
mov rbx, rax
mov esi, 255
mov edx, 10000
mov rdi, rax
call memset
mov rax, rbx
pop rbx
ret
Related clang bug: https://bugs.llvm.org/show_bug.cgi?id=37351
>From gcc-bugs-return-603855-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 15:20:40 2018
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85678
Eric Gallager <egallager at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |egallager at gcc dot gnu.org
--- Comment #1 from Eric Gallager <egallager at gcc dot gnu.org> ---
I think this discussion has been had on either the main gcc mailing list or
gcc-patches recently, but I forget the link...
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Subject: [Bug c/85678] -fno-common should be default
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--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
https://gcc.gnu.org/ml/gcc/2017-09/msg00088.html
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From: "kargl at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/85681] New: r259995 breaks bootstrap on x86_64-*-freebsd
Date: Mon, 07 May 2018 15:28:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85681
Bug ID: 85681
Summary: r259995 breaks bootstrap on x86_64-*-freebsd
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: blocker
Priority: P3
Component: bootstrap
Assignee: unassigned at gcc dot gnu.org
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../../gcc/gcc/tree-ssa-loop-prefetch.c: In function 'bool
should_issue_prefetch_p(mem_ref*)':
../../gcc/gcc/tree-ssa-loop-prefetch.c:1010:54: error: comparison of integer
expressions of different signedness: 'long unsigned int' and 'int'
[-Werror=sign-compare]
&& absu_hwi (int_cst_value (ref->group->step)) <
PREFETCH_MINIMUM_STRIDE)
../../gcc/gcc/tree-ssa-loop-prefetch.c:1014:4: error: format '%d' expects
argument of type 'int', but argument 5 has type 'long int' [-Werror=format=]
"Step for reference %u:%u (%d) is less than the mininum "
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
"required stride of %d\n",
~~~~~~~~~~~~~~~~~~~~~~~~~
ref->group->uid, ref->uid, int_cst_value (ref->group->step),
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1plus: all warnings being treated as errors
gmake[3]: *** [Makefile:1110: tree-ssa-loop-prefetch.o] Error 1
gmake[3]: Leaving directory '/safe/sgk/gcc/obj/gcc'
gmake[2]: *** [Makefile:4662: all-stage2-gcc] Error 2
gmake[2]: Leaving directory '/safe/sgk/gcc/obj'
>From gcc-bugs-return-603858-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 15:29:33 2018
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Subject: [Bug bootstrap/85681] r259995 breaks bootstrap on x86_64-*-freebsd
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P1
Known to fail| |9.0
>From gcc-bugs-return-603859-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 15:31:13 2018
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From: "luis.machado at linaro dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/85681] r259995 breaks bootstrap on x86_64-*-freebsd
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--- Comment #1 from Luis Machado <luis.machado at linaro dot org> ---
Working on it.
>From gcc-bugs-return-603860-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 15:32:45 2018
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From: "kargl at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/85681] r259995 breaks bootstrap on x86_64-*-freebsd
Date: Mon, 07 May 2018 15:32:00 -0000
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--- Comment #2 from kargl at gcc dot gnu.org ---
(In reply to kargl from comment #0)
> ../../gcc/gcc/tree-ssa-loop-prefetch.c: In function 'bool
> should_issue_prefetch_p(mem_ref*)':
> ../../gcc/gcc/tree-ssa-loop-prefetch.c:1010:54: error: comparison of integer
> expressions of different signedness: 'long unsigned int' and 'int'
> [-Werror=sign-compare]
> && absu_hwi (int_cst_value (ref->group->step)) <
> PREFETCH_MINIMUM_STRIDE)
> ../../gcc/gcc/tree-ssa-loop-prefetch.c:1014:4: error: format '%d' expects
> argument of type 'int', but argument 5 has type 'long int' [-Werror=format=]
> "Step for reference %u:%u (%d) is less than the mininum "
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> "required stride of %d\n",
> ~~~~~~~~~~~~~~~~~~~~~~~~~
> ref->group->uid, ref->uid, int_cst_value (ref->group->step),
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> cc1plus: all warnings being treated as errors
> gmake[3]: *** [Makefile:1110: tree-ssa-loop-prefetch.o] Error 1
> gmake[3]: Leaving directory '/safe/sgk/gcc/obj/gcc'
> gmake[2]: *** [Makefile:4662: all-stage2-gcc] Error 2
> gmake[2]: Leaving directory '/safe/sgk/gcc/obj'
The obvious patch
Index: gcc/tree-ssa-loop-prefetch.c
===================================================================
--- gcc/tree-ssa-loop-prefetch.c (revision 259999)
+++ gcc/tree-ssa-loop-prefetch.c (working copy)
@@ -1011,7 +1011,7 @@ should_issue_prefetch_p (struct mem_ref *ref)
{
if (dump_file && (dump_flags & TDF_DETAILS))
fprintf (dump_file,
- "Step for reference %u:%u (%d) is less than the mininum "
+ "Step for reference %u:%u (%ld) is less than the mininum "
"required stride of %d\n",
ref->group->uid, ref->uid, int_cst_value (ref->group->step),
PREFETCH_MINIMUM_STRIDE);
allows bootstrap to get to
-MMD -MP -MF ./.deps/tree-ssa-loop-prefetch.TPo
../../gcc/gcc/tree-ssa-loop-prefetch.c
../../gcc/gcc/tree-ssa-loop-prefetch.c: In function 'bool
should_issue_prefetch_p(mem_ref*)':
../../gcc/gcc/tree-ssa-loop-prefetch.c:1010:54: error: comparison of integer
expressions of different signedness: 'long unsigned int' and 'int'
[-Werror=sign-compare]
&& absu_hwi (int_cst_value (ref->group->step)) <
PREFETCH_MINIMUM_STRIDE)
cc1plus: all warnings being treated as errors
gmake[3]: *** [Makefile:1110: tree-ssa-loop-prefetch.o] Error 1
gmake[3]: Leaving directory '/safe/sgk/gcc/obj/gcc'
gmake[2]: *** [Makefile:4662: all-stage2-gcc] Error 2
gmake[2]: Leaving directory '/safe/sgk/gcc/obj'
Please backout your patch.
>From gcc-bugs-return-603861-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 15:36:41 2018
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From: "luis.machado at linaro dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/85681] r259995 breaks bootstrap on x86_64-*-freebsd
Date: Mon, 07 May 2018 15:36:00 -0000
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--- Comment #3 from Luis Machado <luis.machado at linaro dot org> ---
There are a couple fixups needed in there. The second error you ran into was
already caught by gcc in the first comment.
>From gcc-bugs-return-603862-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 15:38:56 2018
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From: "jgreenhalgh at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/85682] New: Regression: gcc.dg/tree-ssa/prefetch-5.c at r259995
Date: Mon, 07 May 2018 15:38:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85682
Bug ID: 85682
Summary: Regression: gcc.dg/tree-ssa/prefetch-5.c at r259995
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: luis.machado at linaro dot org
Reporter: jgreenhalgh at gcc dot gnu.org
CC: hjl.tools at gmail dot com, law at redhat dot com,
luis.machado at linaro dot org
Target Milestone: ---
Target: x86-64-none-linux-gnu
Hi, our bisect robot spotted failures in
gcc.dg/tree-ssa/prefetch-9.c
gcc.dg/tree-ssa/prefetch-8.c
gcc.dg/tree-ssa/prefetch-7.c
gcc.dg/tree-ssa/prefetch-6.c
gcc.dg/tree-ssa/prefetch-3.c
gcc.target/i386/opt-1.c
gcc.target/i386/opt-2.c
gcc.dg/tree-ssa/loop-28.c
gcc.dg/tree-ssa/prefetch-5.c
after revision r259995 on x86-64-none-linux-gnu. Would you mind taking a look?
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85681
--- Comment #5 from luisgpm at gcc dot gnu.org ---
Author: luisgpm
Date: Mon May 7 15:47:14 2018
New Revision: 260000
URL: https://gcc.gnu.org/viewcvs?rev=260000&root=gcc&view=rev
Log:
2018-05-07 Luis Machado <luis.machado@linaro.org>
PR bootstrap/85681
Revert:
2018-05-07 Luis Machado <luis.machado@linaro.org>
* config/aarch64/aarch64-protos.h (cpu_prefetch_tune)
<prefetch_dynamic_strides>: New const bool field.
* config/aarch64/aarch64.c (generic_prefetch_tune): Update to include
prefetch_dynamic_strides.
(exynosm1_prefetch_tune): Likewise.
(thunderxt88_prefetch_tune): Likewise.
(thunderx_prefetch_tune): Likewise.
(thunderx2t99_prefetch_tune): Likewise.
(qdf24xx_prefetch_tune): Likewise. Set prefetch_dynamic_strides to
false.
(aarch64_override_options_internal): Update to set
PARAM_PREFETCH_DYNAMIC_STRIDES.
* doc/invoke.texi (prefetch-dynamic-strides): Document new option.
* params.def (PARAM_PREFETCH_DYNAMIC_STRIDES): New.
* params.h (PARAM_PREFETCH_DYNAMIC_STRIDES): Define.
* tree-ssa-loop-prefetch.c (should_issue_prefetch_p): Account for
prefetch-dynamic-strides setting.
2018-05-07 Luis Machado <luis.machado@linaro.org>
* config/aarch64/aarch64-protos.h (cpu_prefetch_tune)
<minimum_stride>: New const int field.
* config/aarch64/aarch64.c (generic_prefetch_tune): Update to include
minimum_stride field.
(exynosm1_prefetch_tune): Likewise.
(thunderxt88_prefetch_tune): Likewise.
(thunderx_prefetch_tune): Likewise.
(thunderx2t99_prefetch_tune): Likewise.
(qdf24xx_prefetch_tune): Likewise. Set minimum_stride to 2048.
(aarch64_override_options_internal): Update to set
PARAM_PREFETCH_MINIMUM_STRIDE.
* doc/invoke.texi (prefetch-minimum-stride): Document new option.
* params.def (PARAM_PREFETCH_MINIMUM_STRIDE): New.
* params.h (PARAM_PREFETCH_MINIMUM_STRIDE): Define.
* tree-ssa-loop-prefetch.c (should_issue_prefetch_p): Return false if
stride is constant and is below the minimum stride threshold.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/aarch64/aarch64-protos.h
trunk/gcc/config/aarch64/aarch64.c
trunk/gcc/doc/invoke.texi
trunk/gcc/params.def
trunk/gcc/params.h
trunk/gcc/tree-ssa-loop-prefetch.c
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From: "luis.machado at linaro dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/85681] r259995 breaks bootstrap on x86_64-*-freebsd
Date: Mon, 07 May 2018 15:47:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85681
--- Comment #4 from Luis Machado <luis.machado at linaro dot org> ---
Reverted the offending changes for now.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/85682] Regression: gcc.dg/tree-ssa/prefetch-5.c at r259995
Date: Mon, 07 May 2018 15:49:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85682
--- Comment #1 from Luis Machado <luis.machado at linaro dot org> ---
Will do.
I've temporarily reverted the prefetcher changes since it caused x86 bootstrap
issues. I'll investigate this alongside it.
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Subject: [Bug libstdc++/80506] Wrong magic number in std::gamma_distribution
Date: Mon, 07 May 2018 15:55:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80506
--- Comment #5 from emsr at gcc dot gnu.org ---
Author: emsr
Date: Mon May 7 15:55:11 2018
New Revision: 260001
URL: https://gcc.gnu.org/viewcvs?rev=260001&root=gcc&view=rev
Log:
2018-05-07 Edward Smith-Rowland <3dw4rd@verizon.net>
Moar PR libstdc++/80506
* include/bits/random.tcc (gamma_distribution::__generate_impl()):
Fix magic number used in loop condition.
Removed:
trunk/libstdc++-v3/testsuite/tr1/5_numerical_facilities/special_functions/02_assoc_legendre/check_value.cc
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/tr1/legendre_function.tcc
trunk/libstdc++-v3/testsuite/special_functions/02_assoc_legendre/check_value.cc
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From: "dmitry at zend dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/85683] New: [8 Regression] GCC 8 stopped using RMW (Read Modify Write) instructions on x86[_64]
Date: Mon, 07 May 2018 16:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85683
Bug ID: 85683
Summary: [8 Regression] GCC 8 stopped using RMW (Read Modify
Write) instructions on x86[_64]
Product: gcc
Version: 8.0.1
Status: UNCONFIRMED
Severity: normal
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Reporter: dmitry at zend dot com
Target Milestone: ---
GCC 8 stopped generation of RMW instructions and uses 3 instructions instead of
one. Although, this shouldn't affect executed uops, this increases code size
(pressure to instruction decoder and instruction cache) and requires an extra
register (that may cause extra spills and related degradations).
=== test_rmw.c ===
typedef struct _refcounted {
unsigned int refcount;
} refcounted;
typedef struct _value {
refcounted *val;
} value;
extern void value_dtor_func(refcounted *val);
void ptr_dtor(value *ptr)
{
refcounted *ref = ptr->val;
--ref->refcount;
if (ref->refcount == 0) {
value_dtor_func(ref);
}
}
===
$ gcc -O2 -S test_rmw.c
$ cat test_rmw.s
movq (%rdi), %rdi
movl (%rdi), %eax
subl $1, %eax
movl %eax, (%rdi)
je .L4
ret
.L4:
jmp value_dtor_func
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Subject: [Bug c++/85618] [8/9 Regression] Zero initialized non constant stack array causes internal compile error
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Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |jason at gcc dot gnu.org
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Subject: [Bug libstdc++/80506] Wrong magic number in std::gamma_distribution
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--- Comment #6 from emsr at gcc dot gnu.org ---
Author: emsr
Date: Mon May 7 16:17:32 2018
New Revision: 260004
URL: https://gcc.gnu.org/viewcvs?rev=260004&root=gcc&view=rev
Log:
2018-05-07 Edward Smith-Rowland <3dw4rd@verizon.net>
Moar PR libstdc++/80506
* include/bits/random.tcc (gamma_distribution::__generate_impl()):
Fix magic number used in loop condition.
Modified:
trunk/libstdc++-v3/ChangeLog
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Subject: [Bug libstdc++/80506] Wrong magic number in std::gamma_distribution
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--- Comment #7 from emsr at gcc dot gnu.org ---
Author: emsr
Date: Mon May 7 16:19:34 2018
New Revision: 260005
URL: https://gcc.gnu.org/viewcvs?rev=260005&root=gcc&view=rev
Log:
2018-05-07 Edward Smith-Rowland <3dw4rd@verizon.net>
Backport from mainline
2018-05-07 Edward Smith-Rowland <3dw4rd@verizon.net>
Moar PR libstdc++/80506
* include/bits/random.tcc (gamma_distribution::__generate_impl()):
Fix magic number used in loop condition.
Modified:
branches/gcc-8-branch/libstdc++-v3/ChangeLog
branches/gcc-8-branch/libstdc++-v3/include/bits/random.tcc
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Subject: [Bug c++/85684] New: output of instrinsic _xgetbv is wrongly overwritten
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85684
Bug ID: 85684
Summary: output of instrinsic _xgetbv is wrongly overwritten
Product: gcc
Version: 8.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: gregory.hainaut at gmail dot com
Target Milestone: ---
Hello,
GCC8.0 adds the long long _xgetbv(unsigned int), however the output isn't taken
into account. xgetbv should return values in rdx:rax (edx:eax in 32 bits).
The following code snippet
#include <cstdio>
#include <x86intrin.h>
int main()
{
if ((_xgetbv(0) & 6) == 6)
printf("Yes\n");
else
printf("No\n");
return 0;
}
will compile as (g++ -mavx2), xgetbv in O0 build
...
xgetbv
movq %rsi, %rax
andl $6, %eax
cmpq $6, %rax
sete %al
testb %al, %al
je .L2
...
Note: the full code is optimized in -O1 as only 2 instructions !
main:
movl $0, %ecx
xgetbv
Best regards
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Subject: [Bug libstdc++/80506] Wrong magic number in std::gamma_distribution
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80506
--- Comment #8 from emsr at gcc dot gnu.org ---
Author: emsr
Date: Mon May 7 16:23:29 2018
New Revision: 260006
URL: https://gcc.gnu.org/viewcvs?rev=260006&root=gcc&view=rev
Log:
2018-05-07 Edward Smith-Rowland <3dw4rd@verizon.net>
Jonathan Wakely <jwakely@redhat.com>
Backport from mainline
2018-05-07 Edward Smith-Rowland <3dw4rd@verizon.net>
PR libstdc++/80506
* include/bits/random.tcc (gamma_distribution::operator()): Fix magic
number used in loop condition.
(gamma_distribution::__generate_impl()): Ditto.
Modified:
branches/gcc-7-branch/libstdc++-v3/ChangeLog
branches/gcc-7-branch/libstdc++-v3/include/bits/random.tcc
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Subject: [Bug c++/85646] [7/8/9 Regression] Incorrect lambda visibility with -fvisibility=hidden
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Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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Subject: [Bug target/85683] [8 Regression] GCC 8 stopped using RMW (Read Modify Write) instructions on x86[_64]
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Alexander Monakov <amonakov at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
Smaller testcase:
void f(void);
void g(int *p)
{
if (!--*p)
f();
}
On gcc-7.3 this is optimized by the peephole2 pass so it doesn't really help
with register pressure (combine pass seems more suitable for that); don't know
why the peephole doesn't trigger on gcc-8.
>From gcc-bugs-return-603875-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 16:56:35 2018
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Subject: [Bug target/85616] ARM target using -O2 may cause unaligned access
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--- Comment #4 from Denis Roux <denis_second at hotmail dot com> ---
I agree that the given example code is breaking the C strict aliasing rule.
However, I do not believe that the issue I'm reporting is related to aliasing.
Further more, adding -fno-strict-aliasing option do not alter the output.
The issue I'm having with the optimized code is that it got optimized from 2
store instructions that do not have alignment restriction into 1 multi-store
instruction the does have alignment restriction. I would have expected that the
optimization would have occurred only if the alignment was guaranteed to be
respected.
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Subject: [Bug libstdc++/80506] Wrong magic number in std::gamma_distribution
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--- Comment #9 from emsr at gcc dot gnu.org ---
Author: emsr
Date: Mon May 7 16:59:08 2018
New Revision: 260008
URL: https://gcc.gnu.org/viewcvs?rev=260008&root=gcc&view=rev
Log:
2018-05-07 Edward Smith-Rowland <3dw4rd@verizon.net>
Moar PR libstdc++/80506
* include/bits/random.tcc (gamma_distribution::__generate_impl()):
Fix magic number used in loop condition.
Actually put the file in.
Don't know what my problem is today...
Modified:
trunk/libstdc++-v3/include/bits/random.tcc
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From: "luis.machado at linaro dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/85681] r259995 breaks bootstrap on x86_64-*-freebsd
Date: Mon, 07 May 2018 17:02:00 -0000
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--- Comment #6 from Luis Machado <luis.machado at linaro dot org> ---
Would you please confirm the bootstrap is back to normal and declare it
resolved? I don't have permission to change its state.
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From: "sgk at troutmask dot apl.washington.edu" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/85681] r259995 breaks bootstrap on x86_64-*-freebsd
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--- Comment #7 from Steve Kargl <sgk at troutmask dot apl.washington.edu> ---
On Mon, May 07, 2018 at 05:01:59PM +0000, luis.machado at linaro dot org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85681
>
> --- Comment #6 from Luis Machado <luis.machado at linaro dot org> ---
> Would you please confirm the bootstrap is back to normal and declare it
> resolved? I don't have permission to change its state.
>
With r259995 reverted, gcc completes bootstrap. Is this the
info you want?
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Subject: [Bug bootstrap/85681] r259995 breaks bootstrap on x86_64-*-freebsd
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
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Resolution|--- |FIXED
--- Comment #8 from kargl at gcc dot gnu.org ---
(In reply to Luis Machado from comment #4)
> Reverted the offending changes for now.
Reverting your patch fixes bootstrap, so closing.
Thanks for quick response.
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Subject: [Bug c++/85680] Missed optimization for value-init of variable-sized allocation
Date: Mon, 07 May 2018 17:24:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85680
--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
Quite impressive how we do the test in multiple ways, which are not quite
equivalent because of the wrapping semantics of unsigned. Maybe if we asserted
that the argument of operator new must be less than the size of the address
space / 2 after the call... Probably easier to tweak the C++ FE so it generates
more consistent comparisons (this would only remove 1 test).
<bb 2> [local count: 118111601]:
n.0_11 = (sizetype) n_10(D);
_14 = operator new [] (n.0_11);
_1 = n.0_11 + 18446744073709551615;
_15 = (long int) _1;
if (_15 < 0)
goto <bb 3>; [11.00%]
else
goto <bb 4>; [89.00%]
<bb 3> [local count: 118111600]:
if (n_10(D) <= 0)
goto <bb 6>; [11.00%]
else
goto <bb 5>; [89.00%]
<bb 4> [local count: 105119325]:
_31 = n.0_11 + 18446744073709551614;
_26 = (long int) _31;
_22 = _26 >= -1 ? n.0_11 : 1;
__builtin_memset (_14, 0, _22);
goto <bb 3>; [11.00%]
<bb 5> [local count: 105119324]:
__builtin_memset (_14, 255, n.0_11);
<bb 6> [local count: 118111600]:
return _14;
>From gcc-bugs-return-603881-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 17:27:06 2018
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/85671] Lack of `std::move()` inside `operator/` for `std::filesystem::path`.
Date: Mon, 07 May 2018 17:27:00 -0000
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Mon May 7 17:26:28 2018
New Revision: 260009
URL: https://gcc.gnu.org/viewcvs?rev=260009&root=gcc&view=rev
Log:
PR libstdc++/85671 allow copy elision in path concatenation
By performing the /= operation on a named local variable instead of a
temporary the copy made for the return value can be elided.
PR libstdc++/85671
* include/bits/fs_path.h (operator/): Permit copy elision.
* include/experimental/bits/fs_path.h (operator/): Likewise.
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/bits/fs_path.h
trunk/libstdc++-v3/include/experimental/bits/fs_path.h
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/80506] Wrong magic number in std::gamma_distribution
Date: Mon, 07 May 2018 17:31:00 -0000
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--- Comment #10 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to emsr from comment #5)
> Author: emsr
> Date: Mon May 7 15:55:11 2018
> New Revision: 260001
>
> URL: https://gcc.gnu.org/viewcvs?rev=260001&root=gcc&view=rev
> Log:
> 2018-05-07 Edward Smith-Rowland <3dw4rd@verizon.net>
>
> Moar PR libstdc++/80506
> * include/bits/random.tcc (gamma_distribution::__generate_impl()):
> Fix magic number used in loop condition.
>
>
> Removed:
>
> trunk/libstdc++-v3/testsuite/tr1/5_numerical_facilities/special_functions/
> 02_assoc_legendre/check_value.cc
> Modified:
> trunk/libstdc++-v3/ChangeLog
> trunk/libstdc++-v3/include/tr1/legendre_function.tcc
>
> trunk/libstdc++-v3/testsuite/special_functions/02_assoc_legendre/check_value.
> cc
This commit seems to be something unrelated, was it committed by mistake?
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/85685] New: [7/8/9 Regression] ICE in gfc_deallocate_scalar_with_status, at fortran/trans.c:1598
Date: Mon, 07 May 2018 17:38:00 -0000
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Bug ID: 85685
Summary: [7/8/9 Regression] ICE in
gfc_deallocate_scalar_with_status, at
fortran/trans.c:1598
Product: gcc
Version: 9.0
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Affects versions 7/8/9, if source contains an unused class variable.
Compiles without that line "... unused".
$ cat z1.f90
program p
type t
integer, pointer :: z
end type
class(t), allocatable :: unused
contains
subroutine s(x)
type(t) :: x[*]
if ( associated(x%z) ) deallocate(x%z)
end
end
$ gfortran-6 -c z1.f90 -fcoarray=lib
$
$ gfortran-9-20180506 -c z1.f90 -fcoarray=single
$ gfortran-9-20180506 -c z1.f90 -fcoarray=lib
z1.f90:9:0:
if ( associated(x%z) ) deallocate(x%z)
internal compiler error: in gfc_deallocate_scalar_with_status, at
fortran/trans.c:1598
0x74e610 gfc_deallocate_scalar_with_status(tree_node*, tree_node*, tree_node*,
bool, gfc_expr*, gfc_typespec, bool)
../../gcc/fortran/trans.c:1598
0x7bc806 gfc_trans_deallocate(gfc_code*)
../../gcc/fortran/trans-stmt.c:6943
0x74af27 trans_code
../../gcc/fortran/trans.c:2000
0x7b03f3 gfc_trans_if_1
../../gcc/fortran/trans-stmt.c:1433
0x7b81da gfc_trans_if(gfc_code*)
../../gcc/fortran/trans-stmt.c:1464
0x74b017 trans_code
../../gcc/fortran/trans.c:1916
0x772499 gfc_generate_function_code(gfc_namespace*)
../../gcc/fortran/trans-decl.c:6507
0x772317 gfc_generate_contained_functions
../../gcc/fortran/trans-decl.c:5519
0x772317 gfc_generate_function_code(gfc_namespace*)
../../gcc/fortran/trans-decl.c:6436
0x7015e0 translate_all_program_units
../../gcc/fortran/parse.c:6121
0x7015e0 gfc_parse_file()
../../gcc/fortran/parse.c:6324
0x74832f gfc_be_parse_file
../../gcc/fortran/f95-lang.c:204
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/85686] New: [8/9 Regression] ICE in gfc_conv_scalarized_array_ref, at fortran/trans-array.c:3385
Date: Mon, 07 May 2018 17:41:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85686
Bug ID: 85686
Summary: [8/9 Regression] ICE in gfc_conv_scalarized_array_ref,
at fortran/trans-array.c:3385
Product: gcc
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Changed around 20180218, affects versions 8/9 :
$ cat z1.f90
subroutine s(x)
character(*) :: x(:)
associate (y => 'a'//x)
print *, y
end associate
end
$ gfortran-7 -c z1.f90
$
$ gfortran-9-20180506 -c z1.f90
z1.f90:4:0:
print *, y
internal compiler error: Segmentation fault
0xb9e99f crash_signal
../../gcc/toplev.c:325
0x75333b gfc_conv_scalarized_array_ref
../../gcc/fortran/trans-array.c:3385
0x754049 gfc_conv_array_ref(gfc_se*, gfc_array_ref*, gfc_expr*, locus*)
../../gcc/fortran/trans-array.c:3540
0x781e3d gfc_conv_variable
../../gcc/fortran/trans-expr.c:2737
0x77eb62 gfc_conv_expr(gfc_se*, gfc_expr*)
../../gcc/fortran/trans-expr.c:7930
0x7826c9 gfc_conv_string_length(gfc_charlen*, gfc_expr*, stmtblock_t*)
../../gcc/fortran/trans-expr.c:2242
0x74ef56 get_array_charlen
../../gcc/fortran/trans-array.c:6890
0x74efb4 get_array_charlen
../../gcc/fortran/trans-array.c:6833
0x75cde6 gfc_conv_expr_descriptor(gfc_se*, gfc_expr*)
../../gcc/fortran/trans-array.c:7190
0x7b158f trans_associate_var
../../gcc/fortran/trans-stmt.c:1703
0x7b8721 gfc_trans_block_construct(gfc_code*)
../../gcc/fortran/trans-stmt.c:2065
0x74afa7 trans_code
../../gcc/fortran/trans.c:1924
0x772499 gfc_generate_function_code(gfc_namespace*)
../../gcc/fortran/trans-decl.c:6507
0x7015e0 translate_all_program_units
../../gcc/fortran/parse.c:6121
0x7015e0 gfc_parse_file()
../../gcc/fortran/parse.c:6324
0x74832f gfc_be_parse_file
../../gcc/fortran/f95-lang.c:204
>From gcc-bugs-return-603885-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 17:45:47 2018
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Subject: [Bug fortran/85687] New: ICE in gfc_sym_identifier, at fortran/trans-decl.c:351
Date: Mon, 07 May 2018 17:45:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85687
Bug ID: 85687
Summary: ICE in gfc_sym_identifier, at fortran/trans-decl.c:351
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
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Feeding F2018 intrinsic function RANK with an illegal argument
(t is not a constant or variable) is silently accepted with -std=f2018,
but gives an ICE with -std=f2008 or older.
$ cat z1.f90
program p
type t
end type
print *, rank(t)
end
$ cat z2.f90
program p
type t
integer :: n
end type
print *, rank(t)
end
$ gfortran-9-20180506 -c z1.f90 -std=f2018
$
$ gfortran-9-20180506 -c z1.f90 -std=f2008
z1.f90:2:0:
type t
internal compiler error: Segmentation fault
0xb9e99f crash_signal
../../gcc/toplev.c:325
0x766aa0 gfc_sym_identifier
../../gcc/fortran/trans-decl.c:351
0x767993 build_function_decl
../../gcc/fortran/trans-decl.c:2274
0x76eca3 gfc_get_symbol_decl(gfc_symbol*)
../../gcc/fortran/trans-decl.c:1695
0x781e7f gfc_conv_variable
../../gcc/fortran/trans-expr.c:2554
0x77eb62 gfc_conv_expr(gfc_se*, gfc_expr*)
../../gcc/fortran/trans-expr.c:7930
0x7853be gfc_conv_expr_reference(gfc_se*, gfc_expr*)
../../gcc/fortran/trans-expr.c:8030
0x77a8c0 gfc_conv_procedure_call(gfc_se*, gfc_symbol*, gfc_actual_arglist*,
gfc_expr*, vec<tree_node*, va_gc, vl_embed>*)
../../gcc/fortran/trans-expr.c:5273
0x77e5fc gfc_conv_function_expr
../../gcc/fortran/trans-expr.c:6812
0x77eb42 gfc_conv_expr(gfc_se*, gfc_expr*)
../../gcc/fortran/trans-expr.c:7922
0x785268 gfc_conv_expr_reference(gfc_se*, gfc_expr*)
../../gcc/fortran/trans-expr.c:8057
0x7a5396 gfc_trans_transfer(gfc_code*)
../../gcc/fortran/trans-io.c:2585
0x74ae97 trans_code
../../gcc/fortran/trans.c:2044
0x7a2e47 build_dt
../../gcc/fortran/trans-io.c:2027
0x74aeb7 trans_code
../../gcc/fortran/trans.c:2016
0x772499 gfc_generate_function_code(gfc_namespace*)
../../gcc/fortran/trans-decl.c:6507
0x7015e0 translate_all_program_units
../../gcc/fortran/parse.c:6121
0x7015e0 gfc_parse_file()
../../gcc/fortran/parse.c:6324
0x74832f gfc_be_parse_file
../../gcc/fortran/f95-lang.c:204
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Subject: [Bug libstdc++/85671] Lack of `std::move()` inside `operator/` for `std::filesystem::path`.
Date: Mon, 07 May 2018 17:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85671
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |9.0
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Liu Hao from comment #2)
> There is no difference in implementation as long as NRVO is in effect.
There is a difference.
Using move(path(__lhs) /= __rhs) has one copy construction and one non-elided
move construction.
What I've committed to trunk has a copy construction and an elided move
construction.
>From gcc-bugs-return-603887-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 17:47:33 2018
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From: "redbeard0531 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/85680] Missed optimization for value-init of variable-sized allocation
Date: Mon, 07 May 2018 17:47:00 -0000
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--- Comment #2 from Mathias Stearn <redbeard0531 at gmail dot com> ---
FYI, I don't think this is a signed/unsigned thing since it also repros with
unsigned long https://godbolt.org/g/LTmrpi
My initial repo actually used size_t, but I (incorrectly) changed it to long
rather than unsigned long based on past experience that compiler authors prefer
repros that don't have any #includes and the (IMO) sad fact that size_t still
isn't actually part of the language.
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/85323] SSE/AVX/AVX512 shift by 0 not optimized away
Date: Mon, 07 May 2018 17:51:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 44082
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44082&action=edit
gcc9-pr85323.patch
Untested WIP patch. Still need to add testsuite coverage for the case when
both first and second arguments are constant.
>From gcc-bugs-return-603889-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 19:05:30 2018
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/85672] [9 Regression] error: redefinition of 'constexpr long double std::abs(long double)'
Date: Mon, 07 May 2018 19:05:00 -0000
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--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Marc Glisse from comment #7)
> Yes, or maybe don't generate #define _GLIBCXX_USE_FLOAT128 0 but instead /*
> #undef _GLIBCXX_USE_FLOAT128 */ as we used to do and as the rest of the
> c++config.h file does.
All of those are auto-generated. The custom logic for the float128 macro isn't
auto-generated.
> Actually, I am not sure why r259813 needed to change
> so many things...
Because changing /* #undef _GLIBCXX_USE_FLOAT128 */ to a #define was done by
autoconf, and that gets automatically added at the end of the c++config file
after any manual alterations. The new logic that does:
#if defined(__FLOAT128__) || defined(__SIZEOF_FLOAT128__)
#undef _GLIBCXX_USE_FLOAT128
#endif
comes before the automatically added parts.
My autotools-fu is too weak to come up with anything better but I'd be very
happy if you can suggest something cleaner.
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/85672] [9 Regression] error: redefinition of 'constexpr long double std::abs(long double)'
Date: Mon, 07 May 2018 19:09:00 -0000
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--- Comment #9 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #8)
> The new logic [...] comes before the automatically added parts.
And obviously you can't #undef something that hasn't been defined yet.
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Subject: [Bug libstdc++/80506] Wrong magic number in std::gamma_distribution
Date: Mon, 07 May 2018 19:09:00 -0000
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--- Comment #11 from emsr at gcc dot gnu.org ---
Yes, I had an ugly morning with svn.
Hopefully the bits are rolled back.
That chunk is 83140.
Ed.
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Subject: [Bug libstdc++/85672] [9 Regression] error: redefinition of 'constexpr long double std::abs(long double)'
Date: Mon, 07 May 2018 19:10:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |build
Known to work| |8.1.0
Target Milestone|--- |9.0
Known to fail| |9.0
>From gcc-bugs-return-603893-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 19:22:55 2018
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Subject: [Bug libstdc++/80506] Wrong magic number in std::gamma_distribution
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--- Comment #12 from emsr at gcc dot gnu.org ---
Yes, all other stuff is rolled back except for this patch.
>From gcc-bugs-return-603894-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 19:23:18 2018
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From: "jason at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/85618] [8/9 Regression] Zero initialized non constant stack array causes internal compile error
Date: Mon, 07 May 2018 19:23:00 -0000
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--- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Mon May 7 19:22:35 2018
New Revision: 260012
URL: https://gcc.gnu.org/viewcvs?rev=260012&root=gcc&view=rev
Log:
PR c++/85618 - ICE with initialized VLA.
* tree.c (vla_type_p): New.
* typeck2.c (store_init_value, split_nonconstant_init_1): Check it
rather than array_of_runtime_bound_p.
Added:
trunk/gcc/testsuite/g++.dg/ext/vla20.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/cp-tree.h
trunk/gcc/cp/tree.c
trunk/gcc/cp/typeck2.c
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Subject: [Bug tree-optimization/71769] Invalid warning from -Wunsafe-loop-optimizations for a finite loop
Date: Mon, 07 May 2018 19:29:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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CC| |egallager at gcc dot gnu.org
--- Comment #7 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to amker from comment #6)
> (In reply to nightstrike from comment #5)
> > Could you backport to the branches?
>
> Well, that's release manager's call. Richard?
Guess not...
>From gcc-bugs-return-603896-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 19:35:35 2018
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From: "jason at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/85618] [8/9 Regression] Zero initialized non constant stack array causes internal compile error
Date: Mon, 07 May 2018 19:35:00 -0000
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--- Comment #4 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Mon May 7 19:34:59 2018
New Revision: 260013
URL: https://gcc.gnu.org/viewcvs?rev=260013&root=gcc&view=rev
Log:
PR c++/85618 - ICE with initialized VLA.
* tree.c (vla_type_p): New.
* typeck2.c (store_init_value, split_nonconstant_init_1): Check it
rather than array_of_runtime_bound_p.
Added:
branches/gcc-8-branch/gcc/testsuite/g++.dg/ext/vla20.C
Modified:
branches/gcc-8-branch/gcc/cp/ChangeLog
branches/gcc-8-branch/gcc/cp/cp-tree.h
branches/gcc-8-branch/gcc/cp/tree.c
branches/gcc-8-branch/gcc/cp/typeck2.c
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Subject: [Bug c++/85618] [8/9 Regression] Zero initialized non constant stack array causes internal compile error
Date: Mon, 07 May 2018 19:36:00 -0000
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Jason Merrill <jason at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #5 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-603900-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 19:39:58 2018
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Subject: [Bug c/82922] Request: add -Wstrict-prototypes to -Wextra as K&R style is obsolescent
Date: Mon, 07 May 2018 19:39:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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CC| |david at westcontrol dot com
--- Comment #5 from Eric Gallager <egallager at gcc dot gnu.org> ---
*** Bug 85676 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-603899-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 19:39:58 2018
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Subject: [Bug c/85676] Obsolete function declarations should have warnings by default
Date: Mon, 07 May 2018 19:39:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Status|UNCONFIRMED |RESOLVED
CC| |egallager at gcc dot gnu.org
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--- Comment #1 from Eric Gallager <egallager at gcc dot gnu.org> ---
Dup of bug 82922
*** This bug has been marked as a duplicate of bug 82922 ***
>From gcc-bugs-return-603898-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 19:39:25 2018
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Subject: [Bug libstdc++/85672] [9 Regression] error: redefinition of 'constexpr long double std::abs(long double)'
Date: Mon, 07 May 2018 19:39:00 -0000
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--- Comment #10 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Created attachment 44083
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44083&action=edit
Restore previous behaviour of #undef _GLIBCXX_USE_FLOAT128 based on configure
checks.
This still follows the same approach of custom logic instead of autogenerated
macros, but restores the old behaviour when support is absent during
configuration.
>From gcc-bugs-return-603901-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 19:46:42 2018
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Subject: [Bug target/85593] [6,7,8,9 Regression] GCC on ARM allocates R3 for local variable when calling naked function with O2 optimizations enabled
Date: Mon, 07 May 2018 19:46:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |egallager at gcc dot gnu.org
Known to work| |4.6.4
Summary|[5,6,7,8 Regression] GCC on |[6,7,8,9 Regression] GCC on
|ARM allocates R3 for local |ARM allocates R3 for local
|variable when calling naked |variable when calling naked
|function with O2 |function with O2
|optimizations enabled |optimizations enabled
Known to fail| |5.4.1
--- Comment #6 from Eric Gallager <egallager at gcc dot gnu.org> ---
gcc 5 branch is closed; retitling
>From gcc-bugs-return-603902-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 19:57:18 2018
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Subject: [Bug target/85683] [8/9 Regression] GCC 8 stopped using RMW (Read Modify Write) instructions on x86[_64]
Date: Mon, 07 May 2018 19:57:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
Target Milestone|--- |8.2
Summary|[8 Regression] GCC 8 |[8/9 Regression] GCC 8
|stopped using RMW (Read |stopped using RMW (Read
|Modify Write) instructions |Modify Write) instructions
|on x86[_64] |on x86[_64]
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r247992.
>From gcc-bugs-return-603903-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 20:01:07 2018
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/85688] New: Unhelpful fix-it hint for __float128 when using -mno-float128
Date: Mon, 07 May 2018 20:00:00 -0000
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Bug ID: 85688
Summary: Unhelpful fix-it hint for __float128 when using
-mno-float128
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Keywords: diagnostic
Severity: normal
Priority: P3
Component: c++
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Reporter: redi at gcc dot gnu.org
Target Milestone: ---
g++ -c -x c++ - -mno-float128 <<< 'void f() { __float128 f = 0.0; }'
<stdin>: In function ‘void f()’:
<stdin>:1:12: error: ‘__float128’ was not declared in this scope
<stdin>:1:12: note: suggested alternative: ‘__ieee128’
It might be better to say that __float128 support has been disabled by the
-mno-float128 option, or is not supported for this target and set of options.
>From gcc-bugs-return-603905-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 20:01:48 2018
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Subject: [Bug c++/85688] Unhelpful fix-it hint for __float128 when using -mno-float128
Date: Mon, 07 May 2018 20:01:00 -0000
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
If this is accepted as a bug then I'll create a similar one for the C front
end:
gcc -c -x c - -mno-float128 <<< 'void f() { __float128 f = 0.0; }'
<stdin>: In function ‘f’:
<stdin>:1:12: error: unknown type name ‘__float128’; did you mean ‘_Float128’?
>From gcc-bugs-return-603904-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 20:01:43 2018
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Subject: [Bug target/85683] [8/9 Regression] GCC 8 stopped using RMW (Read Modify Write) instructions on x86[_64]
Date: Mon, 07 May 2018 20:01:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I'll handle this.
>From gcc-bugs-return-603906-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 20:04:10 2018
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From: "msharov at users dot sourceforge.net" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/85689] New: if constexpr compiles false branch
Date: Mon, 07 May 2018 20:04:00 -0000
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Bug ID: 85689
Summary: if constexpr compiles false branch
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int main (void)
{
if constexpr (false)
static_assert (false, "this should not be compiled");
return 0;
}
g++ 8.1 fails compiling the branch with the static_assert even though if
constexpr condition is false. May be the same as #85149, but still present in
g++ 8.1.0 on Arch.
>From gcc-bugs-return-603907-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 20:04:55 2018
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Subject: [Bug bootstrap/32815] crtstuff.c,warning, will always evaluate as 'true'
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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--- Comment #7 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to littlestar from comment #5)
> (In reply to comment #3)
> > > It's known that -O2 contain "-fstrict-aliasing" which has bugs since gcc 3.X.
> > Huh?????
>
> from 4.2.1 status report.
> PR 32182 -fstrict-aliasing ...
> PR 32327 Incorrect stack sharing...
> PR 32328 -fstrict-aliasing ...
>
> ...
These are all closed now.
>From gcc-bugs-return-603908-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 20:06:02 2018
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Subject: [Bug other/25914] strsignal.c:558: warning: comparison between signed and unsigned
Date: Mon, 07 May 2018 20:06:00 -0000
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--- Comment #6 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to John David Anglin from comment #5)
> The libiberty version is documented as unsigned and has been this
> way for many years. The Open Group has a strawman proposal which may
> be submitted to the Austin Group for addition to POSIX in its next
> release. It uses a signed int.
Did this proposal ever happen?
>From gcc-bugs-return-603909-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 20:09:41 2018
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Subject: [Bug target/37759] powerpc option -mabi=no-spe still generates SPE instructions
Date: Mon, 07 May 2018 20:09:00 -0000
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--- Comment #6 from Eric Gallager <egallager at gcc dot gnu.org> ---
Is this still relevant now that powerpc and powerpcspe have been split into
separate targets?
>From gcc-bugs-return-603910-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 20:12:46 2018
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Subject: [Bug target/49656] internal compiler error on Mac OS 10.7.0
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--- Comment #4 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to andreas from comment #3)
> I just compiled GCC 4.6.1 again without clang after I found out how to do
> that.
>
> By defining
> CC = /usr/bin/gcc-4.2
> CPP = /usr/bin/cpp-4.2
> CXX = /usr/bin/g++-4.2
> LD = /usr/bin/gcc-4.2
> before the configure step the Apple GCC is used for compilation.
>
> If you don't do that, clang will be used on Mac OS with XCode >4 and this
> leads to this "internal compiler error".
> So, it doesn't seem to be a GCC issue.
OK, so closing then.
>From gcc-bugs-return-603911-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 20:17:03 2018
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Subject: [Bug bootstrap/44756] [meta-bug] --enable-werror-always issues
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--- Comment #10 from Eric Gallager <egallager at gcc dot gnu.org> ---
alias enable-werror-always
>From gcc-bugs-return-603912-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 20:19:10 2018
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Subject: [Bug fortran/85675] parameters from other modules in openmp default(none) not specified in enclosing 'parallel'
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85675
Harald Anlauf <anlauf at gmx dot de> changed:
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----------------------------------------------------------------------------
CC| |anlauf at gmx dot de
--- Comment #1 from Harald Anlauf <anlauf at gmx dot de> ---
The module file c.mod is the same when compiling the units separately
or in one file. Probably some internal information is not dumped to
the module file or not properly restored when reading the module.
>From gcc-bugs-return-603913-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 20:19:20 2018
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Subject: [Bug target/47098] i686-openbsd3.0: OBSD_LIB_SPEC missing
Date: Mon, 07 May 2018 20:19:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=47098
Eric Gallager <egallager at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #5 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Bernhard Reutner-Fischer from comment #4)
> Fixed on the trunk.
If trunk was 6 at the time, then this bug is fixed overall, since no older
branches are still open.
>From gcc-bugs-return-603914-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 20:19:22 2018
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Subject: [Bug target/47093] [meta-bug]: broken configurations
Date: Mon, 07 May 2018 20:19:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=47093
Bug 47093 depends on bug 47098, which changed state.
Bug 47098 Summary: i686-openbsd3.0: OBSD_LIB_SPEC missing
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=47098
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>From gcc-bugs-return-603915-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 20:20:35 2018
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From: "dave.anglin at bell dot net" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug other/25914] strsignal.c:558: warning: comparison between signed and unsigned
Date: Mon, 07 May 2018 20:20:00 -0000
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--- Comment #7 from dave.anglin at bell dot net ---
On 2018-05-07 4:05 PM, egallager at gcc dot gnu.org wrote:
> Did this proposal ever happen?
Yes:
http://pubs.opengroup.org/onlinepubs/9699919799/functions/psignal.html
>From gcc-bugs-return-603917-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 20:21:58 2018
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Subject: [Bug target/47093] [meta-bug]: broken configurations
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Bug 47093 depends on bug 48904, which changed state.
Bug 48904 Summary: x86_64-knetbsd-gnu fails to build
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=48904
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>From gcc-bugs-return-603916-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 20:21:58 2018
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Subject: [Bug target/48904] x86_64-knetbsd-gnu fails to build
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #6 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Bernhard Reutner-Fischer from comment #5)
> Fixed on the trunk.
If trunk was 6 at the time, then this bug is fixed overall, since no older
branches are still open.
>From gcc-bugs-return-603919-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 20:25:15 2018
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Subject: [Bug target/47093] [meta-bug]: broken configurations
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Bug 47093 depends on bug 55143, which changed state.
Bug 55143 Summary: vms-c.o:(.toc+0x0): undefined reference to `c_default_pointer_mode' (building cc1plus)
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55143
What |Removed |Added
----------------------------------------------------------------------------
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>From gcc-bugs-return-603918-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 20:25:11 2018
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Subject: [Bug target/55143] vms-c.o:(.toc+0x0): undefined reference to `c_default_pointer_mode' (building cc1plus)
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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CC| |egallager at gcc dot gnu.org
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--- Comment #7 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Bernhard Reutner-Fischer from comment #5)
> Fixed on the trunk for 5.0.
>
> Eventual backport including beef-up of the impl is left to the port
> maintainers.
No previous branches are open for backports so this is fixed for all open
branches.
>From gcc-bugs-return-603920-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 20:27:58 2018
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/85685] [7/8/9 Regression] ICE in gfc_deallocate_scalar_with_status, at fortran/trans.c:1598
Date: Mon, 07 May 2018 20:27:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Status|UNCONFIRMED |NEW
Known to work| |6.4.0
Keywords| |ice-on-valid-code
Last reconfirmed| |2018-05-07
CC| |vehre at gcc dot gnu.org
Ever confirmed|0 |1
Target Milestone|--- |7.4
Known to fail| |7.3.0, 8.1.0, 9.0
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
The assert has been introduced by revision r243021.
>From gcc-bugs-return-603921-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 20:32:43 2018
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Subject: [Bug middle-end/54664] expand_gimple_cond warning for predictably small BRANCH_COST
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |build
CC| |egallager at gcc dot gnu.org
Known to fail|4.10.0 |5.0
--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Hans-Peter Nilsson from comment #1)
> Also seen for 4.9.1 and 4.10.0 i.e. trunk r212879.
4.10.0 became 5.0
>From gcc-bugs-return-603922-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 20:41:09 2018
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From: "anlauf at gmx dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/85675] parameters from other modules in openmp default(none) not specified in enclosing 'parallel'
Date: Mon, 07 May 2018 20:41:00 -0000
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--- Comment #2 from Harald Anlauf <anlauf at gmx dot de> ---
Running under the debugger (separate file 2 only):
Breakpoint 1, gfc_omp_predetermined_sharing (decl=0xb7c100fc)
at ../../trunk/gcc/fortran/trans-openmp.c:152
152 if (VAR_P (decl) && TREE_READONLY (decl) && TREE_STATIC (decl))
(gdb) p decl->base.readonly_flag
$10 = 1
(gdb) p decl->base.static_flag
$11 = 0
Running on the whole file:
(gdb) p decl->base.static_flag
$16 = 1
>From gcc-bugs-return-603923-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 20:41:37 2018
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Subject: [Bug target/85683] [8/9 Regression] GCC 8 stopped using RMW (Read Modify Write) instructions on x86[_64]
Date: Mon, 07 May 2018 20:41:00 -0000
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
This seems to work.
--- gcc/config/i386/i386.md.jj 2018-05-02 23:55:44.000000000 +0200
+++ gcc/config/i386/i386.md 2018-05-07 22:27:18.848705146 +0200
@@ -19285,6 +19285,40 @@
const0_rtx);
})
+;; Likewise for cmpelim optimized pattern.
+(define_peephole2
+ [(set (match_operand:SWI 0 "register_operand")
+ (match_operand:SWI 1 "memory_operand"))
+ (parallel [(set (reg FLAGS_REG)
+ (compare (match_operator:SWI 3 "plusminuslogic_operator"
+ [(match_dup 0)
+ (match_operand:SWI 2 "<nonmemory_operand>")])
+ (const_int 0)))
+ (set (match_dup 0) (match_dup 3))])
+ (set (match_dup 1) (match_dup 0))]
+ "(TARGET_READ_MODIFY_WRITE || optimize_insn_for_size_p ())
+ && peep2_reg_dead_p (3, operands[0])
+ && !reg_overlap_mentioned_p (operands[0], operands[1])
+ && !reg_overlap_mentioned_p (operands[0], operands[2])
+ && (<MODE>mode != QImode
+ || immediate_operand (operands[2], QImode)
+ || any_QIreg_operand (operands[2], QImode))
+ && ix86_match_ccmode (peep2_next_insn (1),
+ (GET_CODE (operands[3]) == PLUS
+ || GET_CODE (operands[3]) == MINUS)
+ ? CCGOCmode : CCNOmode)"
+ [(parallel [(set (match_dup 4) (match_dup 6))
+ (set (match_dup 1) (match_dup 5))])]
+{
+ operands[4] = SET_DEST (XVECEXP (PATTERN (peep2_next_insn (1)), 0, 0));
+ operands[5]
+ = gen_rtx_fmt_ee (GET_CODE (operands[3]), GET_MODE (operands[3]),
+ copy_rtx (operands[1]), operands[2]);
+ operands[6]
+ = gen_rtx_COMPARE (GET_MODE (operands[4]), copy_rtx (operands[5]),
+ const0_rtx);
+})
+
;; Likewise for instances where we have a lea pattern.
(define_peephole2
[(set (match_operand:SWI 0 "register_operand")
>From gcc-bugs-return-603924-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 20:42:59 2018
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Subject: [Bug target/58801] 4.7.2 alpha-dec-vms fails to link java front end due to language independent incpath.c:target_c_incpath referencing lanuage dependent vms.c:vms_c_register_includes
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Jay from comment #0)
> This is likely fixed in versions.
> Recording here for either posterity, or to fix in 4.7.newer, or for
> people searching the bug database, though anyone trying this target
> will probably have any problems and know how to figure this out.
>
>
> Oh, drat, there is 4.7.3. I can check it.
All gcc 4 branches are closed, and java has been removed. Closing.
>From gcc-bugs-return-603925-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 20:50:39 2018
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Subject: [Bug c++/85680] Missed optimization for value-init of variable-sized allocation
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--- Comment #3 from Mathias Stearn <redbeard0531 at gmail dot com> ---
MSVC and ICC both also handle this poorly: https://godbolt.org/g/i4wMYa
https://developercommunity.visualstudio.com/content/problem/246786/poor-codegen-for-value-init-followed-by-explicit-i.html
>From gcc-bugs-return-603926-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 20:53:00 2018
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From: "dmalcolm at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug jit/66627] [meta-bug] Tracker bug for jit bugs affecting ravi
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David Malcolm <dmalcolm at gcc dot gnu.org> changed:
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--- Comment #3 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Looks like Ravi deleted the libgccjit backend:
https://github.com/dibyendumajumdar/ravi/issues/142
Closing this one out.
>From gcc-bugs-return-603927-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 20:55:25 2018
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Subject: [Bug middle-end/85559] [meta-bug] Improve conditional move
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
.
>From gcc-bugs-return-603928-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 20:56:42 2018
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Subject: [Bug middle-end/78947] sub-optimal code for (bool)(int ? int : int)
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>From gcc-bugs-return-603929-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 20:58:13 2018
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Subject: [Bug tree-optimization/85316] [meta-bug] VRP range propagation missed cases
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>From gcc-bugs-return-603930-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 21:29:18 2018
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From: "manu at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/85665] Multiple typos in diagnostics
Date: Mon, 07 May 2018 21:29:00 -0000
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |manu at gcc dot gnu.org
--- Comment #4 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
Hi Roland, my guess is that these texts are deep within target-specific code,
where target maintainers normally do not consult with other maintainers
(diagnostic or otherwise) before committing changes to target-specific code and
most of those maintainers are not native speakers. Since those messages are
very specific, they are rarely seen by users. Given the amount of bugs in GCC,
people tend to focus their efforts in other things.
Most of these would require a one line change in the code and you can do such
changes without any legal papers or approval by maintainers if you have write
after approval status. Hence, it may be worth applying for such status, then
applying the changes yourself:
https://gcc.gnu.org/wiki/GettingStarted#Basics:_Contributing_to_GCC_in_10_easy_steps
The first time, it may require a bit of effort to setup subversion/git and you
may need to submit a patch to get write after approval, but it should be
trivial from there onwards.
>From gcc-bugs-return-603931-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 21:30:56 2018
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/85686] [8/9 Regression] ICE in gfc_conv_scalarized_array_ref, at fortran/trans-array.c:3385
Date: Mon, 07 May 2018 21:30:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Status|UNCONFIRMED |NEW
Known to work| |7.3.0
Keywords| |ice-on-valid-code
Last reconfirmed| |2018-05-07
CC| |pault at gcc dot gnu.org
Ever confirmed|0 |1
Target Milestone|--- |8.2
Known to fail| |8.1.0, 9.0
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Likely revision r257781 (pr84115).
>From gcc-bugs-return-603932-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 21:51:08 2018
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Subject: [Bug fortran/85687] ICE in gfc_sym_identifier, at fortran/trans-decl.c:351
Date: Mon, 07 May 2018 21:51:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-05-07
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed from 4.8 up to trunk (9.0). Note that -std=f2018 is accepted on 8.1
and 9.0 only.
>From gcc-bugs-return-603933-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 22:53:49 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/85593] [6,7,8,9 Regression] GCC on ARM allocates R3 for local variable when calling naked function with O2 optimizations enabled
Date: Mon, 07 May 2018 22:53:00 -0000
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--- Comment #7 from Austin Morton <austinpmorton at gmail dot com> ---
I will certainly give writing a patch a try - but I will disclaim up front that
because there is a viable workaround for the issue I was having (patch below
[1]), this issue is "resolved" as far as my employer is concerned.
Nevertheless, I will attempt to tackle this on a weekend out of curiosity
(never had a reason to dig around in compiler guts before).
[1] https://marc.info/?l=linux-bluetooth&m=152535913710490&w=2
>From gcc-bugs-return-603935-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 22:59:48 2018
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Subject: [Bug tree-optimization/85651] Invalid -Warray-bounds warning with -O3
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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Assignee|unassigned at gcc dot gnu.org |msebor at gcc dot gnu.org
>From gcc-bugs-return-603934-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 22:59:10 2018
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Subject: [Bug tree-optimization/85651] Invalid -Warray-bounds warning with -O3
Date: Mon, 07 May 2018 22:59:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-05-07
CC| |msebor at gcc dot gnu.org
Component|c++ |tree-optimization
Ever confirmed|0 |1
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed. The warning is issued from gimple-ssa-warn-restrict.c for the
following expression:
_68 = &logBuilder + _69;
The offset _69 is in the anti-range ~[-9223372036854775800,
-9223372036854775800] which the warning pass interprets as/transforms into
[-9223372036854775799, -9223372036854775801] (this is the range referenced by
the diagnostic). The builtin_memref::offset_out_of_bounds() function detects
this kind of range and has special code to deal with it but only for references
of ARRAY_TYPE. In the test case, logBuilder is RECORD_TYPE so the special
handling isn't performed. The following lightly tested change adds this
handling for structs as well to avoid the spurious warning.
Index: gcc/gimple-ssa-warn-restrict.c
===================================================================
--- gcc/gimple-ssa-warn-restrict.c (revision 260013)
+++ gcc/gimple-ssa-warn-restrict.c (working copy)
@@ -475,7 +475,10 @@ builtin_memref::offset_out_of_bounds (int strict,
/* A temporary, possibly adjusted, copy of the offset range. */
offset_int offrng[2] = { offrange[0], offrange[1] };
- if (DECL_P (base) && TREE_CODE (TREE_TYPE (base)) == ARRAY_TYPE)
+ tree_code basecode = TREE_CODE (TREE_TYPE (base));
+ if (DECL_P (base)
+ && (basecode == ARRAY_TYPE
+ || basecode == RECORD_TYPE))
{
/* Check for offset in an anti-range with a negative lower bound.
For such a range, consider only the non-negative subrange. */
>From gcc-bugs-return-603936-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 23:25:42 2018
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Subject: [Bug jit/66594] jitted code should use -mtune=native
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-05-07
CC| |egallager at gcc dot gnu.org
Ever confirmed|0 |1
Severity|normal |enhancement
--- Comment #7 from Eric Gallager <egallager at gcc dot gnu.org> ---
Confirming as an enhancement
>From gcc-bugs-return-603937-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 23:27:14 2018
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Subject: [Bug jit/66783] No error-checking for creating structs containing opaque structs
Date: Mon, 07 May 2018 23:27:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
CC| |egallager at gcc dot gnu.org
Resolution|--- |FIXED
--- Comment #6 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to David Malcolm from comment #5)
> Keeping this open until it's committed to the gcc-5-branch
gcc-5-branch is closed so this bug can be closed, too.
>From gcc-bugs-return-603938-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 23:27:15 2018
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Subject: [Bug jit/66627] [meta-bug] Tracker bug for jit bugs affecting ravi
Date: Mon, 07 May 2018 23:27:00 -0000
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Bug 66627 depends on bug 66783, which changed state.
Bug 66783 Summary: No error-checking for creating structs containing opaque structs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66783
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
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Subject: [Bug c/84890] Overly verbose notes for missing headers
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |msebor at gcc dot gnu.org
--- Comment #8 from Martin Sebor <msebor at gcc dot gnu.org> ---
I would also find phrasing these notes in the form of suggestions (hints)
preferable to asking questions. #including the header also may not be the only
solution (the definition of INT_MAX can be brought in by including <stdint.h>
in addition to <limits.h>), or even the right one (it isn't for GCC) so rather
than referring to a required header it might be better to simply state that the
symbol is declared (or defined in the case of macros) in the corresponding
standard header.
error: ‘INT_MAX’ undeclared (first use in this function)
note: macro ‘INT_MAX’ is defined in <limits.h>
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Subject: [Bug jit/66811] RFE: have jit dumps be compileable as C code
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-05-07
CC| |egallager at gcc dot gnu.org
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Severity|normal |enhancement
--- Comment #1 from Eric Gallager <egallager at gcc dot gnu.org> ---
Confirming as an enhancement
>From gcc-bugs-return-603941-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 23:29:25 2018
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Subject: [Bug jit/66812] jit code-generation example that unexpectedly required -fno-strict-aliasing to work
Date: Mon, 07 May 2018 23:29:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Keywords| |patch
CC| |egallager at gcc dot gnu.org
--- Comment #11 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to David Malcolm from comment #10)
> Candidate patch posted as:
> https://gcc.gnu.org/ml/jit/2015-q3/msg00060.html
adding "patch" keyword
>From gcc-bugs-return-603942-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 07 23:50:32 2018
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Subject: [Bug c++/85690] New: missing suggested header for std-qualified names
Date: Mon, 07 May 2018 23:50:00 -0000
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Bug ID: 85690
Summary: missing suggested header for std-qualified names
Product: gcc
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For the test case below, GCC suggests to include <cstddef> for the unqualified
reference to ptrdiff_t but it doesn't offer a similar suggestion for the
reference to std::size_t. It should suggest the header to include for both.
In addition, since the <cxxx> kind of C headers need not define symbols in the
global namespace (and not implementations do define them there), for
unqualified references to such symbols GCC should suggest the traditional
<xxx.h> header, and the <cxxx> kind only for std-qualified references.
$ cat b.c && gcc -O3 -S -Wall -Wextra -Wpedantic -xc++ b.c
void f (ptrdiff_t);
void g (std::size_t);
b.c:1:18: error: variable or field ‘f’ declared void
void f (ptrdiff_t);
^
b.c:1:9: error: ‘ptrdiff_t’ was not declared in this scope
void f (ptrdiff_t);
^~~~~~~~~
b.c:1:9: note: ‘ptrdiff_t’ is defined in header ‘<cstddef>’; did you forget to
‘#include <cstddef>’?
+#include <cstddef>
void f (ptrdiff_t);
^~~~~~~~~
b.c:3:20: error: variable or field ‘g’ declared void
void g (std::size_t);
^
b.c:3:14: error: ‘size_t’ is not a member of ‘std’
void g (std::size_t);
^~~~~~
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/85646] [7/8/9 Regression] Incorrect lambda visibility with -fvisibility=hidden
Date: Mon, 07 May 2018 23:50:00 -0000
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--- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Mon May 7 23:50:16 2018
New Revision: 260017
URL: https://gcc.gnu.org/viewcvs?rev=260017&root=gcc&view=rev
Log:
PR c++/85646 - lambda visibility.
* decl2.c (determine_visibility): Don't mess with template arguments
from the containing scope.
(vague_linkage_p): Check DECL_ABSTRACT_P before looking at a 'tor
thunk.
Added:
trunk/gcc/testsuite/g++.dg/ext/visibility/lambda1.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/decl2.c
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Subject: [Bug fortran/85687] ICE in gfc_sym_identifier, at fortran/trans-decl.c:351
Date: Tue, 08 May 2018 00:31:00 -0000
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |kargl at gcc dot gnu.org
--- Comment #2 from kargl at gcc dot gnu.org ---
Index: gcc/fortran/check.c
===================================================================
--- gcc/fortran/check.c (revision 260016)
+++ gcc/fortran/check.c (working copy)
@@ -3894,8 +3894,11 @@ gfc_check_rank (gfc_expr *a)
? a->value.function.esym->result->attr.pointer
: a->symtree->n.sym->result->attr.pointer;
- if (a->expr_type == EXPR_OP || a->expr_type == EXPR_NULL
- || a->expr_type == EXPR_COMPCALL|| a->expr_type == EXPR_PPC
+ if (a->expr_type == EXPR_OP
+ || a->expr_type == EXPR_NULL
+ || a->expr_type == EXPR_COMPCALL
+ || a->expr_type == EXPR_PPC
+ || a->ts.type == BT_PROCEDURE
|| !is_variable)
{
gfc_error ("The argument of the RANK intrinsic at %L must be a data "
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/85691] New: Faulty Class Member Default Initialization - No Warning or Error
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Bug ID: 85691
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/// Bug Report
struct test
{
int x = data;
int data;
test(int o) : data(o) { }
};
/// Potentially Related Issue
struct test2
{
int x;
int data;
test2(int o) : data(o), x(data) { }
};
/*
- Details -
There should be a warning/error for test and test2.
In test the default initialization of x relies on data, which is initialized
after x.
In test2 the constructor initialization list is out of order. Same result as
for test.
- Note -
clang displays a warning for both these cases, but neither gcc nor msvc do
*/
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Subject: [Bug middle-end/85652] -Wformat-overflow warning silenced by -fpic/-fPIC
Date: Tue, 08 May 2018 01:44:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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CC| |msebor at gcc dot gnu.org
Resolution|--- |INVALID
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
As explained in comment #1, with -fpic extern functions are not considered
candidates for inlining because they can be superimposed. Without -fpic GCC
sees that the inlined function can return a string that's as long as 55
characters but with the option a superimposed implementation could be
guaranteed to return a shorter string. The same effect can be seen with other
middle-end warnings, including for example -Warray-bounds with the following
modified test case:
struct b
{
const char *h(int) const;
char c[4][56];
};
const char *b::h(int d) const
{
return c[d]; // no -Warray-bounds with -fpic
}
void f() {
b a;
__builtin_puts (a.h (99));
}
>From gcc-bugs-return-603947-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 08 01:50:45 2018
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/84890] Overly verbose notes for missing headers
Date: Tue, 08 May 2018 01:50:00 -0000
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--- Comment #9 from Martin Sebor <msebor at gcc dot gnu.org> ---
(In reply to Martin Sebor from comment #8)
To clarify: it's not correct to directly include the <string> header in a GCC
source file. Instead, one is expected to define the INCLUDE_STRING macro
before including gcc/system.h.
>From gcc-bugs-return-603948-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 08 02:19:26 2018
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/85650] Additional warnings when -fsanitize=undefined is used with -Wstringop-truncation
Date: Tue, 08 May 2018 02:19:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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CC| |msebor at gcc dot gnu.org
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--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
I actually view the warning in attachment 44067 as a feature (though one that
just coincidentally happens to be enabled by the UBSan instrumentation) and its
absence as a feature request.
The warning in attachment 44068 is the opposite: the UBSan instrumentation gets
in the way of the warning seeing the assignment as a suppression mechanism.
The instrumentation in this case is pointless and can be removed with no loss
of efficacy -- see bug 79265.
>From gcc-bugs-return-603949-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 08 02:19:49 2018
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Subject: [Bug middle-end/85650] Additional warnings when -fsanitize=undefined is used with -Wstringop-truncation
Date: Tue, 08 May 2018 02:19:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
I'll work on this for GCC 9.
>From gcc-bugs-return-603950-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 08 02:31:30 2018
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Subject: [Bug middle-end/85643] attribute nonstring fails to squash -Wstringop-truncation warning
Date: Tue, 08 May 2018 02:31:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed. In both f3() and f4() the destination at a non-zero offset is
represented as a MEM_REF(ADDR_EXPR(VAR_DECL(data)), offset) that the warning
isn't prepared to deal with the same way as when the offset is zero.
>From gcc-bugs-return-603951-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 08 02:32:04 2018
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Subject: [Bug middle-end/85643] attribute nonstring fails to squash -Wstringop-truncation warning
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Let me work on this.
>From gcc-bugs-return-603952-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 08 02:46:41 2018
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Subject: [Bug c/85623] strncmp() warns about attribute 'nonstring' incorrectly in -Wstringop-overflow
Date: Tue, 08 May 2018 02:46:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed with the simpler test case below. GCC transforms the strncmp() call
to strcmp() because it can see that the bound is larger than the length of one
of the arguments but the warning doesn't consider this case (i.e., it triggers
even when the strcmp call cannot read past the end of the non-string array.
$ cat b.c && gcc -O2 -S -Wall b.c
extern __attribute__((nonstring)) char a[4];
int f (const char *s)
{
return __builtin_strcmp (a, "12");
}
b.c: In function ‘f’:
b.c:5:10: warning: ‘__builtin_strcmp’ argument 1 declared attribute ‘nonstring’
[-Wstringop-overflow=]
return __builtin_strcmp (a, "12");
^~~~~~~~~~~~~~~~~~~~~~~~~~
b.c:1:40: note: argument ‘a’ declared here
extern __attribute__((nonstring)) char a[4];
^
>From gcc-bugs-return-603953-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 08 02:49:43 2018
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Subject: [Bug c/85623] strncmp() warns about attribute 'nonstring' incorrectly in -Wstringop-overflow
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----------------------------------------------------------------------------
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--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
This should be easily fixable for the simple cases involving string constants.
It may not be so simple for the non-constant ones.
>From gcc-bugs-return-603955-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 08 03:03:47 2018
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Subject: [Bug middle-end/85619] Inconsistent descriptions for new warning options in GCC 8.1.0
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--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Let me take care of this.
>From gcc-bugs-return-603954-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 08 03:03:28 2018
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Subject: [Bug middle-end/85619] Inconsistent descriptions for new warning options in GCC 8.1.0
Date: Tue, 08 May 2018 03:03:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed.
The "included in -Wall" or "included in -Wextra" bit would ideally be generated
to avoid having to remember to mention it explicitly in the documentation of
every option.
>From gcc-bugs-return-603956-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 08 03:13:48 2018
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Subject: [Bug c++/85646] [7/8/9 Regression] Incorrect lambda visibility with -fvisibility=hidden
Date: Tue, 08 May 2018 03:13:00 -0000
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--- Comment #4 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Tue May 8 03:13:09 2018
New Revision: 260022
URL: https://gcc.gnu.org/viewcvs?rev=260022&root=gcc&view=rev
Log:
PR c++/85646 - lambda visibility.
* decl2.c (determine_visibility): Don't mess with template arguments
from the containing scope.
(vague_linkage_p): Check DECL_ABSTRACT_P before looking at a 'tor
thunk.
Added:
branches/gcc-8-branch/gcc/testsuite/g++.dg/ext/visibility/lambda1.C
Modified:
branches/gcc-8-branch/gcc/cp/ChangeLog
branches/gcc-8-branch/gcc/cp/decl2.c
>From gcc-bugs-return-603957-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 08 04:23:34 2018
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From: "vladimir.mezentsev at oracle dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/84923] [8/9 regression] gcc.dg/attr-weakref-1.c failed on aarch64
Date: Tue, 08 May 2018 04:23:00 -0000
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--- Comment #7 from Vladimir Mezentsev <vladimir.mezentsev at oracle dot com> ---
About comment #3 and #4.
I cannot reproduce a problem.
Is it a cross compilation on x86 for aarch64 ?
What need to do to reproduce the problem ?
>From gcc-bugs-return-603958-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 08 05:35:13 2018
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From: "webrown.cpp at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/85689] if constexpr compiles false branch
Date: Tue, 08 May 2018 05:35:00 -0000
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W E Brown <webrown.cpp at gmail dot com> changed:
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--- Comment #1 from W E Brown <webrown.cpp at gmail dot com> ---
I believe the test program demonstrates that g++ is behaving correctly in
processing static_assert in the context of a constexpr if.
The demonstrated behavior is part of the design of the constexpr if facility as
proposed for and adopted into C++17. Please see wg21.link/p0292, which in
section "Not proposed" exhibits an example very similar to the submitted test
program, pronouncing it "ill-formed".
I respectfully recommend this issue be closed as INVALID, as it seems to be
based on a misunderstanding.
>From gcc-bugs-return-603959-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 08 07:08:42 2018
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Subject: [Bug other/78063] libbacktrace fails to handle cross CU DW_AT_abstract_origin
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Romain Geissler from comment #2)
> Hi,
>
> As written in previous comments, this now breaks both libbacktrace tests +
> all sanitizer tests using backtrace when using gcc >= 8 and an LTO
> bootstrapped compiler.
The sanitizer tests should behave OK (but I didn't recently double-check).
I've adjusted their expected patterns to cope with the new DWARF.
> Shall we XFAIL temporarily these tests in case of LTO bootstrap (if that is
> even possible) ?
>
> Here is a list of tests which are failing for me:
>
> test1: [0]: missing file name or function name
> FAIL: backtrace_full alloc stress
> FAIL: edtest
> test1: [0]: missing file name or function name
> test1: [0]: missing file name or function name
> test1: [0]: missing file name or function name
> test1: [0]: missing file name or function name
> test1: [0]: missing file name or function name
> test1: [0]: missing file name or function name
> test1: [0]: missing file name or function name
> test1: [0]: missing file name or function name
> test1: [0]: missing file name or function name
> test1: [0]: missing file name or function name
> FAIL: threaded backtrace_full noinline
> FAIL: ttest
I think the easiest fix would be to add -fno-lto to the test CFLAGS.
We already build some of the host libraries with -fno-lto for various
reasons. Ah, only libdecnumber it seems.
Of course the best thing would be to fix this bug rather than working
around it...
> Cheers,
> Romain
>From gcc-bugs-return-603960-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 08 07:22:33 2018
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/61502] == comparison on "one-past" pointer gives wrong result
Date: Tue, 08 May 2018 07:22:00 -0000
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--- Comment #25 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Harald van Dijk from comment #22)
> (In reply to Andrew Pinski from comment #21)
> > Invalid as mentioned a few times already but never actually closed until now.
>
> I posted a strictly conforming program that with GCC does not behave as
> required by the standard. The issue is valid, even if the original test case
> is not.
If you are talking about the one in comment#12 then this is the same issue
as present in a few other "similar" bugs where GCC propagates conditional
equivalences (for example the linked PR65752):
v = &y;
p = v;
x = 2, y = 1;
if (p == &x + 1)
*p = 2;
is turned into
v = &y;
p = v;
x = 2, y = 1;
if (p == &x + 1)
*(&x + 1) = 2;
by GCC and the store is then no longer possibly aliasing y.
Conditional equivalences are a difficult thing to exploit for optimization
and there's some work in progress for the standard regarding to pointer
provenance which IIRC says that the comparison result of &y == &x + 1
returns an unspecified value. Not sure if that helps us but then the
only way our for GCC for this particular issue would be to never actually
propagate conditional equivalences.
Sth that might be worth investigating, but within the current structure of
the optimization passes that apply this transform it's impossible to decide
whether a value resulted from conditional equivalences or not... I'm also
not sure to what extent simplification results using a conditional predicate
like p == &x + 1 are affected as well.
IMHO it's a defect in the language if
p = &y;
if (p == &x + 1)
*p = 2;
is valid but
p = &y;
if (p == &x + 1)
*(&x + 1) = 2;
is invoking undefined behavior. Or at least a very uncomfortable situation
for a compiler writer. IMHO the pointer provenance work making the
comparison having unspecified result doesn't really help since that doesn't
make it invoke undefined behavior.
>From gcc-bugs-return-603961-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 08 07:25:59 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/61502] == comparison on "one-past" pointer gives wrong result
Date: Tue, 08 May 2018 07:25:00 -0000
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--- Comment #26 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to James Y Knight from comment #24)
> FWIW, clang did consider this a bug and fixed it in
> https://bugs.llvm.org/show_bug.cgi?id=21327.
Unfortunately it isn't visible _what_ change fixed this and thus if just
some more massaging of the testcase is necessary to make the bug resurface
or if LLVM found a clever way to attack the underlying issue (whatever
underlying issue LLVM had - I'm only guessing it may be the same conditional
propagation).
>From gcc-bugs-return-603962-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 08 07:32:01 2018
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Subject: [Bug rtl-optimization/85638] [8/9 regression] build failure for Ada runtime with SJLJ exceptions on x86
Date: Tue, 08 May 2018 07:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85638
--- Comment #15 from xantares09 at hotmail dot com ---
The build goes through with your second patch too, thanks a lot.
>From gcc-bugs-return-603963-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 08 07:35:15 2018
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/84949] -ffast-math bugged with respect to NaNs
Date: Tue, 08 May 2018 07:35:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84949
--- Comment #5 from rguenther at suse dot de <rguenther at suse dot de> ---
On Thu, 3 May 2018, redi at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84949
>
> --- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
> std::numeric_limits<float> defines:
>
> static _GLIBCXX_USE_CONSTEXPR bool has_infinity = __FLT_HAS_INFINITY__;
> static _GLIBCXX_USE_CONSTEXPR bool has_quiet_NaN = __FLT_HAS_QUIET_NAN__;
> static _GLIBCXX_USE_CONSTEXPR bool has_signaling_NaN = has_quiet_NaN;
> static _GLIBCXX_USE_CONSTEXPR float_denorm_style has_denorm
> = bool(__FLT_HAS_DENORM__) ? denorm_present : denorm_absent;
> //...
> static _GLIBCXX_USE_CONSTEXPR bool is_iec559
> = has_infinity && has_quiet_NaN && has_denorm == denorm_present;
^^^
note that this really can't work in a way to reflect the state
of flags like -ffinite-math-only because those can be different
_per function_. Of course then the preprocessor macros do not
reflect reality either...
bool __attribute__((optimize("finite-math-only")))
isnan1 (double x, int &a)
{
a = __FINITE_MATH_ONLY__;
return __builtin_isnan(x);
}
bool __attribute__((optimize("no-finite-math-only")))
isnan2 (double x, int &a)
{
a = __FINITE_MATH_ONLY__;
return __builtin_isnan(x);
}
int main()
{
int a;
__builtin_printf ("%d %d\n", isnan1(__builtin_nan(""), a), a);
__builtin_printf ("%d %d\n", isnan2(__builtin_nan(""), a), a);
}
> g++-7 t.c
> ./a.out
0 0
1 0
> g++-7 t.c -ffinite-math-only
> ./a.out
0 0
1 1
note that __FLT_HAS_QUIET_NAN__ is not affected by flags.
> And that seems to be the right thing to do. If the compiler tells us the type
> has infinities and NaNs then we expose that through std::numeric_limits.
>
> I don't think we want the C++ library to be inconsistent with the compiler
> here. So maybe any change should be in the compiler not libstdc++.
So my points in comment#1 still stand. It might be unfortunate
(even more so since you can't actually rely on __FINITE_MATH_ONLY__)
but it's not likely to change (people have repeatedly requested
that at least isnan() continues to return true for NaNs for example).
>From gcc-bugs-return-603964-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 08 07:48:03 2018
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From: "tkoenig at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/54613] [F08] Add FINDLOC plus support MAXLOC/MINLOC with KIND=/BACKDate: Tue, 08 May 2018 07:48:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=54613
--- Comment #9 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Author: tkoenig
Date: Tue May 8 07:47:19 2018
New Revision: 260023
URL: https://gcc.gnu.org/viewcvs?rev=260023&root=gcc&view=rev
Log:
2018-05-08 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/54613
* check.c (gfc_check_minmaxloc): Remove error for BACK not being
implemented. Use gfc_logical_4_kind for BACK.
* simplify.c (min_max_choose): Add optional argument back_val.
Handle it.
(simplify_minmaxloc_to_scalar): Add argument back_val. Pass
back_val to min_max_choose.
(simplify_minmaxloc_to_nodim): Likewise.
(simplify_minmaxloc_to_array): Likewise.
(gfc_simplify_minmaxloc): Add argument back, handle it.
Pass back_val to specific simplification functions.
(gfc_simplify_minloc): Remove ATTRIBUTE_UNUSED from argument back,
pass it on to gfc_simplify_minmaxloc.
(gfc_simplify_maxloc): Likewise.
* trans-intrinsic.c (gfc_conv_intrinsic_minmaxloc): Adjust
comment. If BACK is true, use greater or equal (or lesser or
equal) insteal of greater (or lesser). Mark the condition of
having found a value which exceeds the limit as unlikely.
2018-05-08 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/54613
* m4/iforeach-s.m4: Remove assertion that back is zero.
* m4/iforeach.m4: Likewise. Remove leading 'do'
before implementation start.
* m4/ifunction-s.m4: Remove assertion that back is zero.
* m4/ifunction.m4: Likewise. Remove for loop if HAVE_BACK_ARG
is defined.
* m4/maxloc0.m4: Reorganize loops. Split loops between >= and =,
depending if back is true. Mark the condition of having
found a value which exceeds the limit as unlikely.
* m4/minloc0.m4: Likewise.
* m4/maxloc1.m4: Likewise.
* m4/minloc1.m4: Likewise.
* m4/maxloc1s.m4: Handle back argument.
* m4/minloc1s.m4: Likewise.
* m4/maxloc2s.m4: Remove assertion that back is zero.
Remove special handling of loop start. Handle back argument.
* m4/minloc2s.m4: Likewise.
* generated/iall_i1.c: Regenerated.
* generated/iall_i16.c: Regenerated.
* generated/iall_i2.c: Regenerated.
* generated/iall_i4.c: Regenerated.
* generated/iall_i8.c: Regenerated.
* generated/iany_i1.c: Regenerated.
* generated/iany_i16.c: Regenerated.
* generated/iany_i2.c: Regenerated.
* generated/iany_i4.c: Regenerated.
* generated/iany_i8.c: Regenerated.
* generated/iparity_i1.c: Regenerated.
* generated/iparity_i16.c: Regenerated.
* generated/iparity_i2.c: Regenerated.
* generated/iparity_i4.c: Regenerated.
* generated/iparity_i8.c: Regenerated.
* generated/maxloc0_16_i1.c: Regenerated.
* generated/maxloc0_16_i16.c: Regenerated.
* generated/maxloc0_16_i2.c: Regenerated.
* generated/maxloc0_16_i4.c: Regenerated.
* generated/maxloc0_16_i8.c: Regenerated.
* generated/maxloc0_16_r10.c: Regenerated.
* generated/maxloc0_16_r16.c: Regenerated.
* generated/maxloc0_16_r4.c: Regenerated.
* generated/maxloc0_16_r8.c: Regenerated.
* generated/maxloc0_16_s1.c: Regenerated.
* generated/maxloc0_16_s4.c: Regenerated.
* generated/maxloc0_4_i1.c: Regenerated.
* generated/maxloc0_4_i16.c: Regenerated.
* generated/maxloc0_4_i2.c: Regenerated.
* generated/maxloc0_4_i4.c: Regenerated.
* generated/maxloc0_4_i8.c: Regenerated.
* generated/maxloc0_4_r10.c: Regenerated.
* generated/maxloc0_4_r16.c: Regenerated.
* generated/maxloc0_4_r4.c: Regenerated.
* generated/maxloc0_4_r8.c: Regenerated.
* generated/maxloc0_4_s1.c: Regenerated.
* generated/maxloc0_4_s4.c: Regenerated.
* generated/maxloc0_8_i1.c: Regenerated.
* generated/maxloc0_8_i16.c: Regenerated.
* generated/maxloc0_8_i2.c: Regenerated.
* generated/maxloc0_8_i4.c: Regenerated.
* generated/maxloc0_8_i8.c: Regenerated.
* generated/maxloc0_8_r10.c: Regenerated.
* generated/maxloc0_8_r16.c: Regenerated.
* generated/maxloc0_8_r4.c: Regenerated.
* generated/maxloc0_8_r8.c: Regenerated.
* generated/maxloc0_8_s1.c: Regenerated.
* generated/maxloc0_8_s4.c: Regenerated.
* generated/maxloc1_16_i1.c: Regenerated.
* generated/maxloc1_16_i16.c: Regenerated.
* generated/maxloc1_16_i2.c: Regenerated.
* generated/maxloc1_16_i4.c: Regenerated.
* generated/maxloc1_16_i8.c: Regenerated.
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* generated/maxloc1_16_r16.c: Regenerated.
* generated/maxloc1_16_r4.c: Regenerated.
* generated/maxloc1_16_r8.c: Regenerated.
* generated/maxloc1_16_s1.c: Regenerated.
* generated/maxloc1_16_s4.c: Regenerated.
* generated/maxloc1_4_i1.c: Regenerated.
* generated/maxloc1_4_i16.c: Regenerated.
* generated/maxloc1_4_i2.c: Regenerated.
* generated/maxloc1_4_i4.c: Regenerated.
* generated/maxloc1_4_i8.c: Regenerated.
* generated/maxloc1_4_r10.c: Regenerated.
* generated/maxloc1_4_r16.c: Regenerated.
* generated/maxloc1_4_r4.c: Regenerated.
* generated/maxloc1_4_r8.c: Regenerated.
* generated/maxloc1_4_s1.c: Regenerated.
* generated/maxloc1_4_s4.c: Regenerated.
* generated/maxloc1_8_i1.c: Regenerated.
* generated/maxloc1_8_i16.c: Regenerated.
* generated/maxloc1_8_i2.c: Regenerated.
* generated/maxloc1_8_i4.c: Regenerated.
* generated/maxloc1_8_i8.c: Regenerated.
* generated/maxloc1_8_r10.c: Regenerated.
* generated/maxloc1_8_r16.c: Regenerated.
* generated/maxloc1_8_r4.c: Regenerated.
* generated/maxloc1_8_r8.c: Regenerated.
* generated/maxloc1_8_s1.c: Regenerated.
* generated/maxloc1_8_s4.c: Regenerated.
* generated/maxloc2_16_s1.c: Regenerated.
* generated/maxloc2_16_s4.c: Regenerated.
* generated/maxloc2_4_s1.c: Regenerated.
* generated/maxloc2_4_s4.c: Regenerated.
* generated/maxloc2_8_s1.c: Regenerated.
* generated/maxloc2_8_s4.c: Regenerated.
* generated/maxval_i1.c: Regenerated.
* generated/maxval_i16.c: Regenerated.
* generated/maxval_i2.c: Regenerated.
* generated/maxval_i4.c: Regenerated.
* generated/maxval_i8.c: Regenerated.
* generated/maxval_r10.c: Regenerated.
* generated/maxval_r16.c: Regenerated.
* generated/maxval_r4.c: Regenerated.
* generated/maxval_r8.c: Regenerated.
* generated/minloc0_16_i1.c: Regenerated.
* generated/minloc0_16_i16.c: Regenerated.
* generated/minloc0_16_i2.c: Regenerated.
* generated/minloc0_16_i4.c: Regenerated.
* generated/minloc0_16_i8.c: Regenerated.
* generated/minloc0_16_r10.c: Regenerated.
* generated/minloc0_16_r16.c: Regenerated.
* generated/minloc0_16_r4.c: Regenerated.
* generated/minloc0_16_r8.c: Regenerated.
* generated/minloc0_16_s1.c: Regenerated.
* generated/minloc0_16_s4.c: Regenerated.
* generated/minloc0_4_i1.c: Regenerated.
* generated/minloc0_4_i16.c: Regenerated.
* generated/minloc0_4_i2.c: Regenerated.
* generated/minloc0_4_i4.c: Regenerated.
* generated/minloc0_4_i8.c: Regenerated.
* generated/minloc0_4_r10.c: Regenerated.
* generated/minloc0_4_r16.c: Regenerated.
* generated/minloc0_4_r4.c: Regenerated.
* generated/minloc0_4_r8.c: Regenerated.
* generated/minloc0_4_s1.c: Regenerated.
* generated/minloc0_4_s4.c: Regenerated.
* generated/minloc0_8_i1.c: Regenerated.
* generated/minloc0_8_i16.c: Regenerated.
* generated/minloc0_8_i2.c: Regenerated.
* generated/minloc0_8_i4.c: Regenerated.
* generated/minloc0_8_i8.c: Regenerated.
* generated/minloc0_8_r10.c: Regenerated.
* generated/minloc0_8_r16.c: Regenerated.
* generated/minloc0_8_r4.c: Regenerated.
* generated/minloc0_8_r8.c: Regenerated.
* generated/minloc0_8_s1.c: Regenerated.
* generated/minloc0_8_s4.c: Regenerated.
* generated/minloc1_16_i1.c: Regenerated.
* generated/minloc1_16_i16.c: Regenerated.
* generated/minloc1_16_i2.c: Regenerated.
* generated/minloc1_16_i4.c: Regenerated.
* generated/minloc1_16_i8.c: Regenerated.
* generated/minloc1_16_r10.c: Regenerated.
* generated/minloc1_16_r16.c: Regenerated.
* generated/minloc1_16_r4.c: Regenerated.
* generated/minloc1_16_r8.c: Regenerated.
* generated/minloc1_16_s1.c: Regenerated.
* generated/minloc1_16_s4.c: Regenerated.
* generated/minloc1_4_i1.c: Regenerated.
* generated/minloc1_4_i16.c: Regenerated.
* generated/minloc1_4_i2.c: Regenerated.
* generated/minloc1_4_i4.c: Regenerated.
* generated/minloc1_4_i8.c: Regenerated.
* generated/minloc1_4_r10.c: Regenerated.
* generated/minloc1_4_r16.c: Regenerated.
* generated/minloc1_4_r4.c: Regenerated.
* generated/minloc1_4_r8.c: Regenerated.
* generated/minloc1_4_s1.c: Regenerated.
* generated/minloc1_4_s4.c: Regenerated.
* generated/minloc1_8_i1.c: Regenerated.
* generated/minloc1_8_i16.c: Regenerated.
* generated/minloc1_8_i2.c: Regenerated.
* generated/minloc1_8_i4.c: Regenerated.
* generated/minloc1_8_i8.c: Regenerated.
* generated/minloc1_8_r10.c: Regenerated.
* generated/minloc1_8_r16.c: Regenerated.
* generated/minloc1_8_r4.c: Regenerated.
* generated/minloc1_8_r8.c: Regenerated.
* generated/minloc1_8_s1.c: Regenerated.
* generated/minloc1_8_s4.c: Regenerated.
* generated/minloc2_16_s1.c: Regenerated.
* generated/minloc2_16_s4.c: Regenerated.
* generated/minloc2_4_s1.c: Regenerated.
* generated/minloc2_4_s4.c: Regenerated.
* generated/minloc2_8_s1.c: Regenerated.
* generated/minloc2_8_s4.c: Regenerated.
* generated/minval_i1.c: Regenerated.
* generated/minval_i16.c: Regenerated.
* generated/minval_i2.c: Regenerated.
* generated/minval_i4.c: Regenerated.
* generated/minval_i8.c: Regenerated.
* generated/minval_r10.c: Regenerated.
* generated/minval_r16.c: Regenerated.
* generated/minval_r4.c: Regenerated.
* generated/minval_r8.c: Regenerated.
* generated/norm2_r10.c: Regenerated.
* generated/norm2_r16.c: Regenerated.
* generated/norm2_r4.c: Regenerated.
* generated/norm2_r8.c: Regenerated.
* generated/parity_l1.c: Regenerated.
* generated/parity_l16.c: Regenerated.
* generated/parity_l2.c: Regenerated.
* generated/parity_l4.c: Regenerated.
* generated/parity_l8.c: Regenerated.
* generated/product_c10.c: Regenerated.
* generated/product_c16.c: Regenerated.
* generated/product_c4.c: Regenerated.
* generated/product_c8.c: Regenerated.
* generated/product_i1.c: Regenerated.
* generated/product_i16.c: Regenerated.
* generated/product_i2.c: Regenerated.
* generated/product_i4.c: Regenerated.
* generated/product_i8.c: Regenerated.
* generated/product_r10.c: Regenerated.
* generated/product_r16.c: Regenerated.
* generated/product_r4.c: Regenerated.
* generated/product_r8.c: Regenerated.
* generated/sum_c10.c: Regenerated.
* generated/sum_c16.c: Regenerated.
* generated/sum_c4.c: Regenerated.
* generated/sum_c8.c: Regenerated.
* generated/sum_i1.c: Regenerated.
* generated/sum_i16.c: Regenerated.
* generated/sum_i2.c: Regenerated.
* generated/sum_i4.c: Regenerated.
* generated/sum_i8.c: Regenerated.
* generated/sum_r10.c: Regenerated.
* generated/sum_r16.c: Regenerated.
* generated/sum_r4.c: Regenerated.
* generated/sum_r8.c: Regenerated.
2018-05-08 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/54613
* gfortran.dg/minmaxloc_12.f90: New test case.
* gfortran.dg/minmaxloc_13.f90: New test case.
Added:
trunk/gcc/testsuite/gfortran.dg/minmaxloc_12.f90
trunk/gcc/testsuite/gfortran.dg/minmaxloc_13.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/check.c
trunk/gcc/fortran/simplify.c
trunk/gcc/fortran/trans-intrinsic.c
trunk/gcc/testsuite/ChangeLog
trunk/libgfortran/ChangeLog
trunk/libgfortran/generated/iall_i1.c
trunk/libgfortran/generated/iall_i16.c
trunk/libgfortran/generated/iall_i2.c
trunk/libgfortran/generated/iall_i4.c
trunk/libgfortran/generated/iall_i8.c
trunk/libgfortran/generated/iany_i1.c
trunk/libgfortran/generated/iany_i16.c
trunk/libgfortran/generated/iany_i2.c
trunk/libgfortran/generated/iany_i4.c
trunk/libgfortran/generated/iany_i8.c
trunk/libgfortran/generated/iparity_i1.c
trunk/libgfortran/generated/iparity_i16.c
trunk/libgfortran/generated/iparity_i2.c
trunk/libgfortran/generated/iparity_i4.c
trunk/libgfortran/generated/iparity_i8.c
trunk/libgfortran/generated/maxloc0_16_i1.c
trunk/libgfortran/generated/maxloc0_16_i16.c
trunk/libgfortran/generated/maxloc0_16_i2.c
trunk/libgfortran/generated/maxloc0_16_i4.c
trunk/libgfortran/generated/maxloc0_16_i8.c
trunk/libgfortran/generated/maxloc0_16_r10.c
trunk/libgfortran/generated/maxloc0_16_r16.c
trunk/libgfortran/generated/maxloc0_16_r4.c
trunk/libgfortran/generated/maxloc0_16_r8.c
trunk/libgfortran/generated/maxloc0_16_s1.c
trunk/libgfortran/generated/maxloc0_16_s4.c
trunk/libgfortran/generated/maxloc0_4_i1.c
trunk/libgfortran/generated/maxloc0_4_i16.c
trunk/libgfortran/generated/maxloc0_4_i2.c
trunk/libgfortran/generated/maxloc0_4_i4.c
trunk/libgfortran/generated/maxloc0_4_i8.c
trunk/libgfortran/generated/maxloc0_4_r10.c
trunk/libgfortran/generated/maxloc0_4_r16.c
trunk/libgfortran/generated/maxloc0_4_r4.c
trunk/libgfortran/generated/maxloc0_4_r8.c
trunk/libgfortran/generated/maxloc0_4_s1.c
trunk/libgfortran/generated/maxloc0_4_s4.c
trunk/libgfortran/generated/maxloc0_8_i1.c
trunk/libgfortran/generated/maxloc0_8_i16.c
trunk/libgfortran/generated/maxloc0_8_i2.c
trunk/libgfortran/generated/maxloc0_8_i4.c
trunk/libgfortran/generated/maxloc0_8_i8.c
trunk/libgfortran/generated/maxloc0_8_r10.c
trunk/libgfortran/generated/maxloc0_8_r16.c
trunk/libgfortran/generated/maxloc0_8_r4.c
trunk/libgfortran/generated/maxloc0_8_r8.c
trunk/libgfortran/generated/maxloc0_8_s1.c
trunk/libgfortran/generated/maxloc0_8_s4.c
trunk/libgfortran/generated/maxloc1_16_i1.c
trunk/libgfortran/generated/maxloc1_16_i16.c
trunk/libgfortran/generated/maxloc1_16_i2.c
trunk/libgfortran/generated/maxloc1_16_i4.c
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trunk/libgfortran/generated/maxloc1_16_r10.c
trunk/libgfortran/generated/maxloc1_16_r16.c
trunk/libgfortran/generated/maxloc1_16_r4.c
trunk/libgfortran/generated/maxloc1_16_r8.c
trunk/libgfortran/generated/maxloc1_16_s1.c
trunk/libgfortran/generated/maxloc1_16_s4.c
trunk/libgfortran/generated/maxloc1_4_i1.c
trunk/libgfortran/generated/maxloc1_4_i16.c
trunk/libgfortran/generated/maxloc1_4_i2.c
trunk/libgfortran/generated/maxloc1_4_i4.c
trunk/libgfortran/generated/maxloc1_4_i8.c
trunk/libgfortran/generated/maxloc1_4_r10.c
trunk/libgfortran/generated/maxloc1_4_r16.c
trunk/libgfortran/generated/maxloc1_4_r4.c
trunk/libgfortran/generated/maxloc1_4_r8.c
trunk/libgfortran/generated/maxloc1_4_s1.c
trunk/libgfortran/generated/maxloc1_4_s4.c
trunk/libgfortran/generated/maxloc1_8_i1.c
trunk/libgfortran/generated/maxloc1_8_i16.c
trunk/libgfortran/generated/maxloc1_8_i2.c
trunk/libgfortran/generated/maxloc1_8_i4.c
trunk/libgfortran/generated/maxloc1_8_i8.c
trunk/libgfortran/generated/maxloc1_8_r10.c
trunk/libgfortran/generated/maxloc1_8_r16.c
trunk/libgfortran/generated/maxloc1_8_r4.c
trunk/libgfortran/generated/maxloc1_8_r8.c
trunk/libgfortran/generated/maxloc1_8_s1.c
trunk/libgfortran/generated/maxloc1_8_s4.c
trunk/libgfortran/generated/maxloc2_16_s1.c
trunk/libgfortran/generated/maxloc2_16_s4.c
trunk/libgfortran/generated/maxloc2_4_s1.c
trunk/libgfortran/generated/maxloc2_4_s4.c
trunk/libgfortran/generated/maxloc2_8_s1.c
trunk/libgfortran/generated/maxloc2_8_s4.c
trunk/libgfortran/generated/maxval_i1.c
trunk/libgfortran/generated/maxval_i16.c
trunk/libgfortran/generated/maxval_i2.c
trunk/libgfortran/generated/maxval_i4.c
trunk/libgfortran/generated/maxval_i8.c
trunk/libgfortran/generated/maxval_r10.c
trunk/libgfortran/generated/maxval_r16.c
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trunk/libgfortran/generated/maxval_r8.c
trunk/libgfortran/generated/minloc0_16_i1.c
trunk/libgfortran/generated/minloc0_16_i16.c
trunk/libgfortran/generated/minloc0_16_i2.c
trunk/libgfortran/generated/minloc0_16_i4.c
trunk/libgfortran/generated/minloc0_16_i8.c
trunk/libgfortran/generated/minloc0_16_r10.c
trunk/libgfortran/generated/minloc0_16_r16.c
trunk/libgfortran/generated/minloc0_16_r4.c
trunk/libgfortran/generated/minloc0_16_r8.c
trunk/libgfortran/generated/minloc0_16_s1.c
trunk/libgfortran/generated/minloc0_16_s4.c
trunk/libgfortran/generated/minloc0_4_i1.c
trunk/libgfortran/generated/minloc0_4_i16.c
trunk/libgfortran/generated/minloc0_4_i2.c
trunk/libgfortran/generated/minloc0_4_i4.c
trunk/libgfortran/generated/minloc0_4_i8.c
trunk/libgfortran/generated/minloc0_4_r10.c
trunk/libgfortran/generated/minloc0_4_r16.c
trunk/libgfortran/generated/minloc0_4_r4.c
trunk/libgfortran/generated/minloc0_4_r8.c
trunk/libgfortran/generated/minloc0_4_s1.c
trunk/libgfortran/generated/minloc0_4_s4.c
trunk/libgfortran/generated/minloc0_8_i1.c
trunk/libgfortran/generated/minloc0_8_i16.c
trunk/libgfortran/generated/minloc0_8_i2.c
trunk/libgfortran/generated/minloc0_8_i4.c
trunk/libgfortran/generated/minloc0_8_i8.c
trunk/libgfortran/generated/minloc0_8_r10.c
trunk/libgfortran/generated/minloc0_8_r16.c
trunk/libgfortran/generated/minloc0_8_r4.c
trunk/libgfortran/generated/minloc0_8_r8.c
trunk/libgfortran/generated/minloc0_8_s1.c
trunk/libgfortran/generated/minloc0_8_s4.c
trunk/libgfortran/generated/minloc1_16_i1.c
trunk/libgfortran/generated/minloc1_16_i16.c
trunk/libgfortran/generated/minloc1_16_i2.c
trunk/libgfortran/generated/minloc1_16_i4.c
trunk/libgfortran/generated/minloc1_16_i8.c
trunk/libgfortran/generated/minloc1_16_r10.c
trunk/libgfortran/generated/minloc1_16_r16.c
trunk/libgfortran/generated/minloc1_16_r4.c
trunk/libgfortran/generated/minloc1_16_r8.c
trunk/libgfortran/generated/minloc1_16_s1.c
trunk/libgfortran/generated/minloc1_16_s4.c
trunk/libgfortran/generated/minloc1_4_i1.c
trunk/libgfortran/generated/minloc1_4_i16.c
trunk/libgfortran/generated/minloc1_4_i2.c
trunk/libgfortran/generated/minloc1_4_i4.c
trunk/libgfortran/generated/minloc1_4_i8.c
trunk/libgfortran/generated/minloc1_4_r10.c
trunk/libgfortran/generated/minloc1_4_r16.c
trunk/libgfortran/generated/minloc1_4_r4.c
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trunk/libgfortran/generated/minloc1_4_s1.c
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trunk/libgfortran/generated/minloc1_8_i1.c
trunk/libgfortran/generated/minloc1_8_i16.c
trunk/libgfortran/generated/minloc1_8_i2.c
trunk/libgfortran/generated/minloc1_8_i4.c
trunk/libgfortran/generated/minloc1_8_i8.c
trunk/libgfortran/generated/minloc1_8_r10.c
trunk/libgfortran/generated/minloc1_8_r16.c
trunk/libgfortran/generated/minloc1_8_r4.c
trunk/libgfortran/generated/minloc1_8_r8.c
trunk/libgfortran/generated/minloc1_8_s1.c
trunk/libgfortran/generated/minloc1_8_s4.c
trunk/libgfortran/generated/minloc2_16_s1.c
trunk/libgfortran/generated/minloc2_16_s4.c
trunk/libgfortran/generated/minloc2_4_s1.c
trunk/libgfortran/generated/minloc2_4_s4.c
trunk/libgfortran/generated/minloc2_8_s1.c
trunk/libgfortran/generated/minloc2_8_s4.c
trunk/libgfortran/generated/minval_i1.c
trunk/libgfortran/generated/minval_i16.c
trunk/libgfortran/generated/minval_i2.c
trunk/libgfortran/generated/minval_i4.c
trunk/libgfortran/generated/minval_i8.c
trunk/libgfortran/generated/minval_r10.c
trunk/libgfortran/generated/minval_r16.c
trunk/libgfortran/generated/minval_r4.c
trunk/libgfortran/generated/minval_r8.c
trunk/libgfortran/generated/norm2_r10.c
trunk/libgfortran/generated/norm2_r16.c
trunk/libgfortran/generated/norm2_r4.c
trunk/libgfortran/generated/norm2_r8.c
trunk/libgfortran/generated/parity_l1.c
trunk/libgfortran/generated/parity_l16.c
trunk/libgfortran/generated/parity_l2.c
trunk/libgfortran/generated/parity_l4.c
trunk/libgfortran/generated/parity_l8.c
trunk/libgfortran/generated/product_c10.c
trunk/libgfortran/generated/product_c16.c
trunk/libgfortran/generated/product_c4.c
trunk/libgfortran/generated/product_c8.c
trunk/libgfortran/generated/product_i1.c
trunk/libgfortran/generated/product_i16.c
trunk/libgfortran/generated/product_i2.c
trunk/libgfortran/generated/product_i4.c
trunk/libgfortran/generated/product_i8.c
trunk/libgfortran/generated/product_r10.c
trunk/libgfortran/generated/product_r16.c
trunk/libgfortran/generated/product_r4.c
trunk/libgfortran/generated/product_r8.c
trunk/libgfortran/generated/sum_c10.c
trunk/libgfortran/generated/sum_c16.c
trunk/libgfortran/generated/sum_c4.c
trunk/libgfortran/generated/sum_c8.c
trunk/libgfortran/generated/sum_i1.c
trunk/libgfortran/generated/sum_i16.c
trunk/libgfortran/generated/sum_i2.c
trunk/libgfortran/generated/sum_i4.c
trunk/libgfortran/generated/sum_i8.c
trunk/libgfortran/generated/sum_r10.c
trunk/libgfortran/generated/sum_r16.c
trunk/libgfortran/generated/sum_r4.c
trunk/libgfortran/generated/sum_r8.c
trunk/libgfortran/m4/iforeach-s.m4
trunk/libgfortran/m4/iforeach.m4
trunk/libgfortran/m4/ifunction-s.m4
trunk/libgfortran/m4/ifunction.m4
trunk/libgfortran/m4/maxloc0.m4
trunk/libgfortran/m4/maxloc0s.m4
trunk/libgfortran/m4/maxloc1.m4
trunk/libgfortran/m4/maxloc1s.m4
trunk/libgfortran/m4/maxloc2s.m4
trunk/libgfortran/m4/minloc0.m4
trunk/libgfortran/m4/minloc0s.m4
trunk/libgfortran/m4/minloc1.m4
trunk/libgfortran/m4/minloc1s.m4
trunk/libgfortran/m4/minloc2s.m4
>From gcc-bugs-return-603965-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 08 07:52:45 2018
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/38960] Wrong floating point reorder
Date: Tue, 08 May 2018 07:52:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=38960
--- Comment #6 from rguenther at suse dot de <rguenther at suse dot de> ---
On Fri, 4 May 2018, joseph at codesourcery dot com wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=38960
>
> --- Comment #5 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
> Since any non-const function can examine floating-point state, I'd expect
> significant effects on code generation. (Whether this also applies to
> asms depends on the architecture; some architectures have a register name
> you can use in asm operands to refer to floating-point state, and in those
> cases asms reading or writing that state "should" say explicitly that they
> do so, but I don't think all architectures have such a name supported by
> GCC in asms.)
That's true. GCCs job would then be to prove and IPA-propagate knowledge
of which functions actually do access FP state.
If it actually works (still needs to be proven by experiment) it is
still the simplest approach for "fixing" the issue. If it works
a first enhancement would be to not re-use returns_twice but invent
a new attribute so we can do more careful abnormal edge creation.
An alternative fix could involve forcing all FP computation results
to (addressable aka aliasable) memory and make FP state accesses
also access all (FP?) memory.
Alternatively all FP ops could be "lowered" to internal functions
and thus basically hidden from the optimizers. Dependences to
FP state accessors can be handled as memory dependence then. This
lowering would be similar to what is proposed for a -ftrapv replacement.
The issue then remains on the RTL side though (but maybe we're lucky
and re-ordering doesn't happen there and/or we could expand suitable
barriers before and after possible FP state accesses).
Another alternative would be to try to model the FP state explicitely.
With the right infrastructure this would allow modeling other CPU
state (CC flags) in a similar way.
I think that the force-to-memory variant isn't really worth exploring
since it involves a lot of engineering with questionable benefit
over the "simple" solution(s).
>From gcc-bugs-return-603966-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 08 07:55:38 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/85588] [6/7/8 Regression] -fwrapv miscompilation
Date: Tue, 08 May 2018 07:55:00 -0000
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--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Mikael Pettersson from comment #7)
> (In reply to Richard Biener from comment #6)
> > Fixed on trunk sofar.
>
> I believe the fix was mistakenly labelled as PR85574 (including the file
> name of the new test case).
Whoops sorry, will fix the file name.
>From gcc-bugs-return-603967-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 08 07:56:00 2018
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Subject: [Bug tree-optimization/85588] [6/7/8 Regression] -fwrapv miscompilation
Date: Tue, 08 May 2018 07:56:00 -0000
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--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue May 8 07:55:24 2018
New Revision: 260024
URL: https://gcc.gnu.org/viewcvs?rev=260024&root=gcc&view=rev
Log:
2018-05-08 Richard Biener <rguenther@suse.de>
PR middle-end/85588
* gcc.dg/torture/pr85574.c: Rename to...
* gcc.dg/torture/pr85588.c: ... this.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr85588.c
- copied unchanged from r260023,
trunk/gcc/testsuite/gcc.dg/torture/pr85574.c
Removed:
trunk/gcc/testsuite/gcc.dg/torture/pr85574.c
Modified:
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-603968-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 08 08:33:26 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/85627] [6/7/8 Regression] ICE in update_phi_components in tree-complex.c
Date: Tue, 08 May 2018 08:33:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85627
--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue May 8 08:32:46 2018
New Revision: 260025
URL: https://gcc.gnu.org/viewcvs?rev=260025&root=gcc&view=rev
Log:
2018-05-08 Richard Biener <rguenther@suse.de>
Backport from mainline
2018-05-04 Richard Biener <rguenther@suse.de>
* bb-reorder.c (sanitize_hot_paths): Release hot_bbs_to_check.
* gimple-ssa-store-merging.c
(imm_store_chain_info::output_merged_store): Remove redundant create,
release split_store vector contents on failure.
* tree-vect-slp.c (vect_schedule_slp_instance): Avoid leaking
scalar stmt vector on cache hit.
2018-05-04 Richard Biener <rguenther@suse.de>
PR middle-end/85627
* tree-complex.c (tree_lower_complex): Handle removed blocks.
* g++.dg/torture/pr85627.C: New testcase.
Added:
branches/gcc-8-branch/gcc/testsuite/g++.dg/torture/pr85627.C
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/bb-reorder.c
branches/gcc-8-branch/gcc/gimple-ssa-store-merging.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
branches/gcc-8-branch/gcc/tree-complex.c
branches/gcc-8-branch/gcc/tree-vect-slp.c
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug testsuite/85654] [9 Regression] gcc.dg/vect/pr85586.c FAILs
Date: Tue, 08 May 2018 08:45:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|tree-optimization |testsuite
Summary|gcc.dg/vect/pr85586.c FAILs |[9 Regression]
| |gcc.dg/vect/pr85586.c FAILs
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Not sure why we don't use versioning for alignment here.
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Subject: [Bug bootstrap/85571] [9 Regression] non-bootstrap-debug miscompare with trunk
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #12 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug bootstrap/85571] [9 Regression] non-bootstrap-debug miscompare with trunk
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--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue May 8 08:50:33 2018
New Revision: 260026
URL: https://gcc.gnu.org/viewcvs?rev=260026&root=gcc&view=rev
Log:
2018-05-08 Richard Biener <rguenther@suse.de>
PR bootstrap/85571
config/
* bootstrap-lto-noplugin.mk: Disable compare.
* bootstrap-lto.mk: Supply contrib/compare-lto for do-compare.
contrib/
* compare-lto: New script derived from compare-debug.
Added:
trunk/contrib/compare-lto (with props)
Modified:
trunk/config/ChangeLog
trunk/config/bootstrap-lto-noplugin.mk
trunk/config/bootstrap-lto.mk
trunk/contrib/ChangeLog
Propchange: trunk/contrib/compare-lto
('svn:executable' added)
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Subject: [Bug c++/80691] Narrowing conversion in {} allowed in a SFINAE context
Date: Tue, 08 May 2018 08:56:00 -0000
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--- Comment #5 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> ---
Author: paolo
Date: Tue May 8 08:55:30 2018
New Revision: 260027
URL: https://gcc.gnu.org/viewcvs?rev=260027&root=gcc&view=rev
Log:
2018-05-08 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/80691
* g++.dg/cpp0x/narrowing1.C: New.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/narrowing1.C
Modified:
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/80691] Narrowing conversion in {} allowed in a SFINAE context
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |8.0
--- Comment #6 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Fixed in 8.1.0.
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Subject: [Bug ipa/85655] [8/9 Regression] ICE with -flto and -O2 during IPA pass: cp lto1: internal compiler error: Segmentation fault
Date: Tue, 08 May 2018 09:04:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
Status|UNCONFIRMED |NEW
Keywords| |ice-on-valid-code, lto
Last reconfirmed| |2018-05-08
Component|c++ |ipa
CC| |jamborm at gcc dot gnu.org,
| |marxin at gcc dot gnu.org
Ever confirmed|0 |1
Summary|ICE with -flto and -O2 |[8/9 Regression] ICE with
|during IPA pass: cp lto1: |-flto and -O2 during IPA
|internal compiler error: |pass: cp lto1: internal
|Segmentation fault |compiler error:
| |Segmentation fault
Target Milestone|--- |8.2
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
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Subject: [Bug target/85658] [8/9 Regression] gcc-8.0.1 stopped validating --with-arch= flag
Date: Tue, 08 May 2018 09:11:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |arm
Priority|P3 |P2
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-05-08
Component|bootstrap |target
Target Milestone|--- |8.2
Summary|gcc-8.0.1 stopped |[8/9 Regression] gcc-8.0.1
|validating --with-arch= |stopped validating
|flag |--with-arch= flag
Ever confirmed|0 |1
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Please post patches to gcc-patches@gcc.gnu.org
Confirmed from looking at the patch.
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Subject: [Bug c++/80956] [7 Regression] ICE with abstract class vector
Date: Tue, 08 May 2018 09:11:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |dmalcolm at gcc dot gnu.org
--- Comment #10 from Paolo Carlini <paolo.carlini at oracle dot com> ---
*** Bug 81024 has been marked as a duplicate of this bug. ***
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/81024] ICE within convert_like_real with std::initializer_list
Date: Tue, 08 May 2018 09:11:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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----------------------------------------------------------------------------
Status|NEW |RESOLVED
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--- Comment #2 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Dup.
*** This bug has been marked as a duplicate of bug 80956 ***
>From gcc-bugs-return-603978-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 08 09:22:03 2018
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Subject: [Bug target/85658] [8/9 Regression] gcc-8.0.1 stopped validating --with-arch= flag
Date: Tue, 08 May 2018 09:22:00 -0000
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Richard Earnshaw <rearnsha at gcc dot gnu.org> changed:
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--- Comment #4 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
Mine. There are other cases where the precedence is wrong as well. Working on
a patch
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/85662] [8/9 Regression] "error: non-constant condition for static assertion" from __builtin_offsetof in C++
Date: Tue, 08 May 2018 09:23:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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Subject: [Bug sanitizer/85663] [8/9 Regression] gcc-8.0.1 regression: sanitizer fails to build on mips-unknown-linux-gnu
Date: Tue, 08 May 2018 09:28:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |mips
Target Milestone|--- |8.2
Summary|gcc-8.0.1 regression: |[8/9 Regression] gcc-8.0.1
|sanitizer fails to build on |regression: sanitizer fails
|mips-unknown-linux-gnu |to build on
| |mips-unknown-linux-gnu
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From: "asolokha at gmx dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/37759] powerpc option -mabi=no-spe still generates SPE instructions
Date: Tue, 08 May 2018 09:36:00 -0000
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Arseny Solokha <asolokha at gmx dot com> changed:
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CC| |asolokha at gmx dot com
--- Comment #7 from Arseny Solokha <asolokha at gmx dot com> ---
AFAICT, it's still the case for powerpcspe target even on trunk (as of
r259982). While gcc apparently doesn't generate SPE instructions for both
attached testcases anymore, I've just easily reproduced the issue w/ our
internal codebase.
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Subject: [Bug target/85616] ARM target using -O2 may cause unaligned access
Date: Tue, 08 May 2018 09:43:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Using
*(unsigned int *) &buf_start[0]
you are telling GCC that &buf_start[0] is aligned to 4 bytes. You have to
use sth like
typedef myint unsigned int __attribute__((aligned(1)));
*(myint *) &buf_start[0]
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From: "linux at carewolf dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/85692] New: Two source permute not used for vector initialization
Date: Tue, 08 May 2018 09:43:00 -0000
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Bug ID: 85692
Summary: Two source permute not used for vector initialization
Product: gcc
Version: 8.0
Status: UNCONFIRMED
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Priority: P3
Component: tree-optimization
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Target Milestone: ---
If a vector initialization is using elements from only a single vector source,
it will be optimized as a shuffle, but if it is using elements from two, it
will not be attempted.
This appears to be a missing case in
tree-ssa-forwprop.c:simplify_vector_constructor
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/85665] Multiple typos in diagnostics
Date: Tue, 08 May 2018 09:45:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Target| |arm
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Guessing this might be arm...
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From: "harald at gigawatt dot nl" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/61502] == comparison on "one-past" pointer gives wrong result
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--- Comment #27 from Harald van Dijk <harald at gigawatt dot nl> ---
(In reply to Richard Biener from comment #25)
> (In reply to Harald van Dijk from comment #22)
> > (In reply to Andrew Pinski from comment #21)
> > > Invalid as mentioned a few times already but never actually closed until now.
> >
> > I posted a strictly conforming program that with GCC does not behave as
> > required by the standard. The issue is valid, even if the original test case
> > is not.
>
> If you are talking about the one in comment#12 then this is the same issue
> as present in a few other "similar" bugs where GCC propagates conditional
> equivalences (for example the linked PR65752):
Right, there are a lot of ways this can come up.
> Conditional equivalences are a difficult thing to exploit for optimization
> and there's some work in progress for the standard regarding to pointer
> provenance which IIRC says that the comparison result of &y == &x + 1
> returns an unspecified value.
For C++ it's http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#1652
> Not sure if that helps us
I don't think it does. Although the change would allow p == &x + 1 to evaluate
as false even though they have the same address, there is no sane way for GCC
to actually let it evaluate it as false when p comes from a volatile variable.
> but then the
> only way our for GCC for this particular issue would be to never actually
> propagate conditional equivalences.
Well, there are two incompatible optimisations. This one could be disabled or
restricted, or see below.
> IMHO it's a defect in the language if
>
> p = &y;
> if (p == &x + 1)
> *p = 2;
>
> is valid but
>
> p = &y;
> if (p == &x + 1)
> *(&x + 1) = 2;
>
> is invoking undefined behavior.
A legitimate reading of C90 and C99 says the second is valid as well, but it's
not the reading the committee went with. Allowing this, as an extension to what
the standards allow, would be a way to keep the p -> &x + 1 transformation
working. It would naturally break some of the current optimisations that GCC
performs, but so would the alternative.
(In reply to Richard Biener from comment #26)
> Unfortunately it isn't visible _what_ change fixed this
The revision number is listed in Richard Smith's second comment. The changes
can be seen with
svn diff -c 220343 https://llvm.org/svn/llvm-project/
That's also where I got the C++ issue number from.
> and thus if just
> some more massaging of the testcase is necessary to make the bug resurface
> or if LLVM found a clever way to attack the underlying issue (whatever
> underlying issue LLVM had - I'm only guessing it may be the same conditional
> propagation).
When they turn a comparison between a pointer to an object and a pointer to one
past an object into a non-constant expression, that's apparently enough for
them to force the comparison to be performed at run-time.
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Subject: [Bug tree-optimization/85692] Two source permute not used for vector initialization
Date: Tue, 08 May 2018 09:46:00 -0000
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--- Comment #1 from Allan Jensen <linux at carewolf dot com> ---
Created attachment 44084
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44084&action=edit
construct.cc
Motivating examples. Compile with -msse4.1 for the second case.
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From: "paolo at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70563] SFINAE fails when trying invalid template instantiation
Date: Tue, 08 May 2018 10:04:00 -0000
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--- Comment #2 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> ---
Author: paolo
Date: Tue May 8 10:03:39 2018
New Revision: 260030
URL: https://gcc.gnu.org/viewcvs?rev=260030&root=gcc&view=rev
Log:
2018-05-08 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/70563
* g++.dg/cpp0x/sfinae62.C: New.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/sfinae62.C
Modified:
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/70563] SFINAE fails when trying invalid template instantiation
Date: Tue, 08 May 2018 10:05:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |7.0
--- Comment #3 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Fixed in 7.1.0.
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Subject: [Bug go/85037] SIGSEGV in gotools testsuite affects several tests
Date: Tue, 08 May 2018 10:06:00 -0000
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--- Comment #1 from Uroš Bizjak <ubizjak at gmail dot com> ---
The failure recently [1] changed to
"fatal error: mallocgc called with gcphase == _GCmarktermination":
FAIL: TestCgoSignalDeadlock
crash_test.go:55: building testprogcgo []: exit status 2
#
_/space/uros/gcc-svn/trunk/libgo/go/runtime/testdata/testprogcgo
fatal error: mallocgc called with gcphase == _GCmarktermination
goroutine 1 [running]:
runtime.dopanic
/space/homedirs/uros/gcc-svn/trunk/libgo/go/runtime/panic.go:912
runtime.throw
/space/homedirs/uros/gcc-svn/trunk/libgo/go/runtime/panic.go:822
runtime.mallocgc
/space/homedirs/uros/gcc-svn/trunk/libgo/go/runtime/malloc.go:602
runtime.newobject
/space/homedirs/uros/gcc-svn/trunk/libgo/go/runtime/malloc.go:873
os.newProcess
/space/homedirs/uros/gcc-svn/trunk/libgo/go/os/exec.go:25
os.startProcess
/space/homedirs/uros/gcc-svn/trunk/libgo/go/os/exec_posix.go:50
os.StartProcess
/space/homedirs/uros/gcc-svn/trunk/libgo/go/os/exec.go:102
os_exec.Cmd.Start
/space/homedirs/uros/gcc-svn/trunk/libgo/go/os/exec/exec.go:379
os_exec.Cmd.Run
/space/homedirs/uros/gcc-svn/trunk/libgo/go/os/exec/exec.go:302
main.run
/space/homedirs/uros/gcc-svn/trunk/gotools/../libgo/go/cmd/cgo/util.go:62
main.runGcc
/space/homedirs/uros/gcc-svn/trunk/gotools/../libgo/go/cmd/cgo/gcc.go:1736
main.Package.gccDefines
/space/homedirs/uros/gcc-svn/trunk/gotools/../libgo/go/cmd/cgo/gcc.go:1692
main.Package.loadDefines
/space/homedirs/uros/gcc-svn/trunk/gotools/../libgo/go/cmd/cgo/gcc.go:203
main.Package.Translate
/space/homedirs/uros/gcc-svn/trunk/gotools/../libgo/go/cmd/cgo/gcc.go:185
main.main
/space/homedirs/uros/gcc-svn/trunk/gotools/../libgo/go/cmd/cgo/main.go:333
runtime.main
/space/homedirs/uros/gcc-svn/trunk/libgo/go/runtime/proc.go:225
[1] https://gcc.gnu.org/ml/gcc-testresults/2018-05/msg00816.html
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/61502] == comparison on "one-past" pointer gives wrong result
Date: Tue, 08 May 2018 10:09:00 -0000
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--- Comment #28 from rguenther at suse dot de <rguenther at suse dot de> ---
On Tue, 8 May 2018, harald at gigawatt dot nl wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61502
>
> --- Comment #27 from Harald van Dijk <harald at gigawatt dot nl> ---
> (In reply to Richard Biener from comment #26)
> > Unfortunately it isn't visible _what_ change fixed this
>
> The revision number is listed in Richard Smith's second comment. The changes
> can be seen with
>
> svn diff -c 220343 https://llvm.org/svn/llvm-project/
>
> That's also where I got the C++ issue number from.
OK, so that's a frontend only change (constexpr).
> > and thus if just
> > some more massaging of the testcase is necessary to make the bug resurface
> > or if LLVM found a clever way to attack the underlying issue (whatever
> > underlying issue LLVM had - I'm only guessing it may be the same conditional
> > propagation).
>
> When they turn a comparison between a pointer to an object and a pointer to one
> past an object into a non-constant expression, that's apparently enough for
> them to force the comparison to be performed at run-time.
I'm quite sure they manage to "optimize"
int a, b;
bool foo()
{
return &a == &b;
}
as well as
int a, b;
bool foo(int i)
{
if (i == 1)
return &a == &b + i;
return true;
}
hmm, clang 3.8 does not. It even fails to optimize &a == &b + 2
which would be a valid optimization (to false) as this bug is only
about one-past, not about arbitrary compares.
As said the real issue in GCC is the propagation of the
address constant triggered by the conditional equality.
In the other PR that re-surfaces even for integer comparisons.
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Subject: [Bug c++/68812] [concepts] bogus mismatched argument pack lengths
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-05-08
Blocks| |67491
Ever confirmed|0 |1
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67491
[Bug 67491] [meta-bug] concepts issues
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Subject: [Bug c++/85668] ICE with substitution failure
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-invalid-code
Status|UNCONFIRMED |NEW
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
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--- Comment #5 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
Author: rearnsha
Date: Tue May 8 10:21:34 2018
New Revision: 260032
URL: https://gcc.gnu.org/viewcvs?rev=260032&root=gcc&view=rev
Log:
[arm] PR target/85658 Fix operator precedence errors in parsecpu.awk
There are a number of places in parsecpu.awk where I've managed to get
the operator precedence between ! and 'in' incorrect (! binds more
tightly). In most cases this just makes a consistency test
ineffective, but in a few cases it means we fail to correctly diagnose
errors by the user (for example, when passing an invalid cpu or
architecture name to configure. This patch fixes all the cases I
could find, based on searching for all uses of the two operators in
the same expression. The tweak to the API of check_fpu is to bring it
into line with the other check functions - it now returns the result
rather than printing it directly. The caller now does the printing,
in the same way that the chkarch and chkcpu commands do.
PR target/85658
* config/arm/parsecpu.awk (check_cpu): Fix operator precedence.
(check_arch): Likewise.
(check_fpu): Return the result rather than printing it.
(end arch): Fix operator precedence.
(end cpu): Likewise.
(END): Print the result from check_fpu.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/arm/parsecpu.awk
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/85666] gcc-8.0.1 fails to build mmix target: gcc/libgcc/libgcc2.h:203:20: internal compiler error: in leaf_function_p, at final.c:4488
Date: Tue, 08 May 2018 10:24:00 -0000
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Wilco <wilco at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |wilco at gcc dot gnu.org
--- Comment #3 from Wilco <wilco at gcc dot gnu.org> ---
(In reply to Sergei Trofimovich from comment #1)
> #define MMIX_CFUN_NEEDS_SAVED_EH_RETURN_ADDRESS \
> (flag_exceptions \
> && ((reload_completed && df_regs_ever_live_p (MMIX_rJ_REGNUM)) \
> || !leaf_function_p ())) /// <- here
Yes that looks like a bug. leaf_function_p cannot be called on a sequence as it
will incorrectly return true on non-leaf functions. So
MMIX_CFUN_NEEDS_SAVED_EH_RETURN_ADDRESS will randomly change its result if
called again later. starting_frame_offset should however return a fixed value,
so the reload_completed part also looks wrong.
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Subject: [Bug target/85669] fail on s-case-cfn-macros: build/gencfn-macros: DEF_INTERNAL_FLT/INT_FN (%smth%) has no associated built-in functions
Date: Tue, 08 May 2018 10:26:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Component|regression |target
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
How did you configure?
>From gcc-bugs-return-603996-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 08 10:27:02 2018
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From: "glisse at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/85680] Missed optimization for value-init of variable-sized allocation
Date: Tue, 08 May 2018 10:27:00 -0000
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--- Comment #4 from Marc Glisse <glisse at gcc dot gnu.org> ---
All memset come from ldist, so already quite late in the pipeline. Maybe
clang/intel, who avoid a comparison between new and the first memset, generate
memset directly from the front-end? (clang generates the first memset even at
-O0)
Even
if(n<0)__builtin_unreachable();
doesn't quite solve the problem, because we don't realize that n==0 is the same
as (size_t)n==0 :-( (a mix of single_use restrictions, pass ordering, etc)
If I cheat and add
if(n<=0)__builtin_unreachable();
surprisingly we fail to remove the first memset in
n.0_11 = (sizetype) n_10(D);
_14 = operator new [] (n.0_11);
__builtin_memset (_14, 0, n.0_11);
__builtin_memset (_14, 255, n.0_11);
return _14;
I really thought we had code to do that...
>From gcc-bugs-return-603997-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 08 10:31:19 2018
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Subject: [Bug c/85678] -fno-common should be default
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed (and agreed).
>From gcc-bugs-return-603998-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 08 10:34:09 2018
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Subject: [Bug target/85658] [8/9 Regression] gcc-8.0.1 stopped validating --with-arch= flag
Date: Tue, 08 May 2018 10:34:00 -0000
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--- Comment #6 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
Author: rearnsha
Date: Tue May 8 10:33:33 2018
New Revision: 260034
URL: https://gcc.gnu.org/viewcvs?rev=260034&root=gcc&view=rev
Log:
[arm] PR target/85658 Fix operator precedence errors in parsecpu.awk
There are a number of places in parsecpu.awk where I've managed to get
the operator precedence between ! and 'in' incorrect (! binds more
tightly). In most cases this just makes a consistency test
ineffective, but in a few cases it means we fail to correctly diagnose
errors by the user (for example, when passing an invalid cpu or
architecture name to configure. This patch fixes all the cases I
could find, based on searching for all uses of the two operators in
the same expression. The tweak to the API of check_fpu is to bring it
into line with the other check functions - it now returns the result
rather than printing it directly. The caller now does the printing,
in the same way that the chkarch and chkcpu commands do.
PR target/85658
* config/arm/parsecpu.awk (check_cpu): Fix operator precedence.
(check_arch): Likewise.
(check_fpu): Return the result rather than printing it.
(end arch): Fix operator precedence.
(end cpu): Likewise.
(END): Print the result from check_fpu.
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/config/arm/parsecpu.awk
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Subject: [Bug target/85658] [8/9 Regression] gcc-8.0.1 stopped validating --with-arch= flag
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Richard Earnshaw <rearnsha at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #7 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
Fixed on trunk and gcc-8 branch.
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Subject: [Bug c++/85680] Missed optimization for value-init of variable-sized allocation
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
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Last reconfirmed| |2018-05-08
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--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
The "issue" in the C++ FE is probably that it uses the size promoted
to sizetype in the loop rather than the original size.
(void) (p = TARGET_EXPR <D.2282, operator new [] ((long unsigned int)
NON_LVALUE_EXPR <SAVE_EXPR <(sizetype) n>>)>;, try
{
char * D.2283;
<<< Unknown tree: expr_stmt
(void) (D.2283 = (char *) D.2282) >>>;
char * D.2284;
<<< Unknown tree: expr_stmt
(void) (D.2284 = D.2283) >>>;
long int D.2285;
<<< Unknown tree: expr_stmt
(void) (D.2285 = (long int) (SAVE_EXPR <(sizetype) n> +
18446744073709551615)) >>>;
while (1)
{
if (D.2285 < 0) goto <D.2287>;
<<cleanup_point <<< Unknown tree: expr_stmt
(void) (*D.2284 = 0) >>>>>;
<<< Unknown tree: expr_stmt
(void) ++D.2284 >>>;
(void) --D.2285;
}
see how it uses (sizetype) n in the SAVE_EXPR and the loop conditional.
The looping construct it emits is "interesting" as well, it boils down to
for (;--n>=0;)
*p++ = 0;
I suppose the FE should emit what suits -Os/-O0 best, the ME should handle
turning this into a do-while style loop.
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Subject: [Bug target/85683] [8/9 Regression] GCC 8 stopped using RMW (Read Modify Write) instructions on x86[_64]
Date: Tue, 08 May 2018 10:43:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
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From: "dougmencken at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/85669] fail on s-case-cfn-macros: build/gencfn-macros: DEF_INTERNAL_FLT/INT_FN (%smth%) has no associated built-in functions
Date: Tue, 08 May 2018 10:44:00 -0000
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--- Comment #4 from Douglas Mencken <dougmencken at gmail dot com> ---
(In reply to Richard Biener from comment #3)
> How did you configure?
As always
../gcc-8.1.0/configure \
--build=powerpc-unknown-darwin --host=powerpc-unknown-darwin
--target=powerpc-unknown-darwin \
--prefix=/Developer/GCC/8.1/PowerPC/32bit \
--enable-languages=c,c++,objc,obj-c++ \
--enable-shared --enable-static \
--enable-checking=release \
--enable-threads=posix --with-__thread --without-system-zlib \
--disable-nls --disable-werror
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From: "paolo.carlini at oracle dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/57429] Dependent function call with one visible declaration, deleted
Date: Tue, 08 May 2018 10:48:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |7.0
--- Comment #3 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Fixed in 7.1.0.
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From: "paolo at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/57429] Dependent function call with one visible declaration, deleted
Date: Tue, 08 May 2018 10:48:00 -0000
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--- Comment #2 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> ---
Author: paolo
Date: Tue May 8 10:47:24 2018
New Revision: 260035
URL: https://gcc.gnu.org/viewcvs?rev=260035&root=gcc&view=rev
Log:
2018-05-08 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/57429
* g++.dg/cpp0x/deleted14.C: New.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/deleted14.C
Modified:
trunk/gcc/testsuite/ChangeLog
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/85689] if constexpr compiles false branch
Date: Tue, 08 May 2018 10:52:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Done so.
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From: "glisse at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/85672] [9 Regression] error: redefinition of 'constexpr long double std::abs(long double)'
Date: Tue, 08 May 2018 11:10:00 -0000
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--- Comment #11 from Marc Glisse <glisse at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #8)
> My autotools-fu is too weak to come up with anything better but I'd be very
> happy if you can suggest something cleaner.
For the general case, the autoconf manual suggests having another file and
using
AH_BOTTOM([#include <post.h>])
to get it included at the end of config.h.
However, in the specific case of c++config.h in libstdc++, we are building it
manually in include/Makefile.am:
sed ... < ${glibcxx_srcdir}/include/bits/c++config > $@
sed ... < ${CONFIG_HEADER} >> $@
echo "" >> $@
echo "#endif // _GLIBCXX_CXX_CONFIG_H" >> $@
If we wanted to, it wouldn't be hard to cat whatever >> $@ after CONFIG_HEADER.
Since you have something that works now, there is no need to change it, but we
should keep this in mind for next time.
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Subject: [Bug libstdc++/85672] [9 Regression] error: redefinition of 'constexpr long double std::abs(long double)'
Date: Tue, 08 May 2018 11:13:00 -0000
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--- Comment #12 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Thanks for the suggestion, it would clean up a few things in c++config so I'll
move to that next time, instead of adding another hack.
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Subject: [Bug c++/85690] missing suggested header for std-qualified names
Date: Tue, 08 May 2018 11:16:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-05-08
Ever confirmed|0 |1
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Martin Sebor from comment #0)
> In addition, since the <cxxx> kind of C headers need not define symbols in
> the global namespace (and not implementations do define them there), for
> unqualified references to such symbols GCC should suggest the traditional
> <xxx.h> header, and the <cxxx> kind only for std-qualified references.
Very much confirmed.
We must not suggest <cxxx> headers for unqualified names, that's just wrong.
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Subject: [Bug middle-end/85586] [8/9 Regression] Optimizer produces different result on -O2 and -O3
Date: Tue, 08 May 2018 11:18:00 -0000
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--- Comment #8 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
Author: rsandifo
Date: Tue May 8 11:17:57 2018
New Revision: 260036
URL: https://gcc.gnu.org/viewcvs?rev=260036&root=gcc&view=rev
Log:
Tighten condition in vect/pr85586.c (PR 85654)
2018-05-08 Richard Sandiford <richard.sandiford@linaro.org>
gcc/testsuite/
PR testsuite/85586
* gcc.dg/vect/pr85586.c: Restrict LOOP VECTORIZED test to
!vect_no_align.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/vect/pr85586.c
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Subject: [Bug middle-end/85586] [8/9 Regression] Optimizer produces different result on -O2 and -O3
Date: Tue, 08 May 2018 11:19:00 -0000
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--- Comment #9 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
Author: rsandifo
Date: Tue May 8 11:18:40 2018
New Revision: 260037
URL: https://gcc.gnu.org/viewcvs?rev=260037&root=gcc&view=rev
Log:
Tighten condition in vect/pr85586.c (PR 85654)
2018-05-08 Richard Sandiford <richard.sandiford@linaro.org>
gcc/testsuite/
PR testsuite/85586
* gcc.dg/vect/pr85586.c: Restrict LOOP VECTORIZED test to
!vect_no_align.
Modified:
branches/gcc-8-branch/gcc/testsuite/ChangeLog
branches/gcc-8-branch/gcc/testsuite/gcc.dg/vect/pr85586.c
>From gcc-bugs-return-604011-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 08 11:24:48 2018
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Subject: [Bug testsuite/85654] [9 Regression] gcc.dg/vect/pr85586.c FAILs
Date: Tue, 08 May 2018 11:24:00 -0000
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--- Comment #2 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #1)
> Not sure why we don't use versioning for alignment here.
I think it's probably a case of not knowing at that stage that
out[] is going to be implemented using elementwise accesses,
and so alignment doesn't matter. We could probably use
get_load_store_type to check.
>From gcc-bugs-return-604013-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 08 11:25:17 2018
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Subject: [Bug c++/19808] miss a warning about uninitialized member usage in member initializer list in constructor
Date: Tue, 08 May 2018 11:25:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |roger at rankedgaming dot com
--- Comment #36 from Jonathan Wakely <redi at gcc dot gnu.org> ---
*** Bug 85691 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-604012-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 08 11:25:13 2018
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Subject: [Bug c++/85691] Faulty Class Member Default Initialization - No Warning or Error
Date: Tue, 08 May 2018 11:25:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Did you forget to enable warnings? GCC warns about test2 but not test:
$ g++ -Wall -c 85691.cc
85691.cc: In constructor ‘test2::test2(int)’:
85691.cc:14:13: warning: ‘test2::data’ will be initialized after [-Wreorder]
int data;
^~~~
85691.cc:13:13: warning: ‘int test2::x’ [-Wreorder]
int x;
^
85691.cc:16:9: warning: when initialized here [-Wreorder]
test2(int o) : data(o), x(data) { }
^~~~~
Clang has the same behaviour for -Wreorder, but it additionally warns about
test::data with -Wuninitialized:
85691.cc:4:17: warning: field 'data' is uninitialized when used here
[-Wuninitialized]
int x = data;
^
85691.cc:7:9: note: during field initialization in this constructor
test(int o) : data(o) { }
^
85691.cc:16:24: warning: field 'data' will be initialized after field 'x'
[-Wreorder]
test2(int o) : data(o), x(data) { }
^
85691.cc:16:35: warning: field 'data' is uninitialized when used here
[-Wuninitialized]
test2(int o) : data(o), x(data) { }
^
3 warnings generated.
We already have Bug 19808 covering this.
*** This bug has been marked as a duplicate of bug 19808 ***
>From gcc-bugs-return-604014-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 08 11:33:31 2018
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Subject: [Bug c++/19808] miss a warning about uninitialized member usage in member initializer list in constructor
Date: Tue, 08 May 2018 11:33:00 -0000
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--- Comment #37 from Jonathan Wakely <redi at gcc dot gnu.org> ---
N.B. we should also warn using uninitialized members in default member
initializers, e.g. both of these should produce a warning:
struct X {
int x1 = x2;
int x2 = 0;
};
X x{}; // causes definition of default constructor
struct Y {
int y1 = y2;
int y2;
Y() : y2(0) { }
};
Clang warns about both:
defmeminit.cc:2:12: warning: field 'x2' is uninitialized when used here
[-Wuninitialized]
int x1 = x2;
^
defmeminit.cc:6:3: note: in implicit default constructor for 'X' first required
here
X x{};
^
defmeminit.cc:1:8: note: during field initialization in the implicit default
constructor
struct X {
^
defmeminit.cc:9:12: warning: field 'y2' is uninitialized when used here
[-Wuninitialized]
int y1 = y2;
^
defmeminit.cc:11:3: note: during field initialization in this constructor
Y() : y2(0) { }
^
2 warnings generated.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug testsuite/85654] [9 Regression] gcc.dg/vect/pr85586.c FAILs
Date: Tue, 08 May 2018 11:37:00 -0000
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rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
Fixed by r260036 on trunk and r260037 on gcc-8-branch.
>From gcc-bugs-return-604016-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 08 11:43:34 2018
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Subject: [Bug target/85665] Multiple typos in diagnostics
Date: Tue, 08 May 2018 11:43:00 -0000
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--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Roland Illig from comment #3)
> (In reply to Jonathan Wakely from comment #2)
> > It might be better to report multiple bugs, one per target backend, so that
> > the relevant target maintainers are informed.
>
> Oh, I tried that last year. Of the 113 bugs I reported, 41 are still open.
That's a shame. As Manu said, the ones in target-specific code are often only
seen by maintainers of that target, not reviewed by the global reviewers or the
diagnostics maintainers. On the plus side, some of these diagnostics are
probably only rarely seen by users, and not on widely-used targets.
> Therefore I thought I'd try a different approach this time.
Understandable. Thank you for persisting with trying to fix these kind of
issues.
You're likely to have more success if you simply send a patch with fixes to
gcc-patches@gcc.gnu.org, CCing the diagnostics maintainers. They can then
review your suggested fixes and commit the whole patch to fix everything at
once. Even better would be to get write access to SVN and fix them yourself
(getting approval for anything that isn't an "obvious fix" as per
https://gcc.gnu.org/svnwrite.html#policies under "Free for all").
> Since it's only about the wording of the diagnostics, it should be possible
> to handle them all in a few commits, rather than splitting the work onto 12
> people.
>
> > To avoid similar problems in future, I wonder if a weekly email detailing
> > any new or modified diagnostics could be produced automatically. The
> > diagnostics maintainers (and anybody else interested) could look over it and
> > ensure that we use correct grammar, punctuation, and style.
>
> Does this mean you already have diagnostics maintainers?
Yes, see the MAINTAINERS file.
> That would be bad
> because then they should have caught many of these typos already.
Only if they review every target-specific patch to see if it has changes for
diagnostic messages. They're busy people and have lots of other things to do.
Maintainers of target backends are trusted to make changes to the subsystems
they maintain.
> There were
> only 53 new strings to translate, and 12 of them contain mistakes.
>
> Instead of pushing this task to humans, I still think an automatic process
> is much more efficient since it doesn't overlook the most commonly occurring
> patterns. Having human proof readers in addition is nice, too. But having
> the existing rules codified in a linter program is more important.
I agree that would be great, but it needs somebody to do the work.
An imperfect solution would be as I described, to create a weekly summary of
all changes to diagnostics, which human reviewers could check through once per
week and catch these kind of errors before the release.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85665
--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #5)
> Guessing this might be arm...
Maybe some of them are arm but some are in other targets.
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Subject: [Bug tree-optimization/85692] Two source permute not used for vector initialization
Date: Tue, 08 May 2018 11:55:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85692
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-05-08
Ever confirmed|0 |1
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
>From gcc-bugs-return-604019-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 08 11:57:40 2018
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From: "luis.machado at linaro dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/85682] Regression: gcc.dg/tree-ssa/prefetch-5.c at r259995
Date: Tue, 08 May 2018 11:57:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85682
--- Comment #2 from Luis Machado <luis.machado at linaro dot org> ---
Did it even bootstrap properly? It shouldn't have been built in the first place
i guess, due to the signedness error of a particular chunk of code.
I did a fresh x86-64 bootstrap with the changes in and those prefetch tests are
not executed as part of dg.exp. Running by hand they look sane to me.
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Subject: [Bug target/85480] zero extension from xmm to zmm via _mm512_insert???x? not optimized
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85480
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue May 8 12:02:38 2018
New Revision: 260039
URL: https://gcc.gnu.org/viewcvs?rev=260039&root=gcc&view=rev
Log:
PR target/85480
* config/i386/sse.md (ssequaterinsnmode): New mode attribute.
(*<extract_type>_vinsert<shuffletype><extract_suf>_0): New pattern.
* gcc.target/i386/avx512dq-pr85480-1.c: New test.
* gcc.target/i386/avx512dq-pr85480-2.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/avx512dq-pr85480-1.c
trunk/gcc/testsuite/gcc.target/i386/avx512dq-pr85480-2.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/sse.md
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug target/85317] missing constant propagation on _mm(256)_movemask_*
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85317
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue May 8 12:04:25 2018
New Revision: 260040
URL: https://gcc.gnu.org/viewcvs?rev=260040&root=gcc&view=rev
Log:
PR target/85317
* config/i386/i386.c (ix86_fold_builtin): Handle
IX86_BUILTIN_{,P}MOVMSK{PS,PD,B}{,128,256}.
* gcc.target/i386/pr85317.c: New test.
* gcc.target/i386/avx2-vpmovmskb-2.c (avx2_test): Add asm volatile
optimization barrier to avoid optimizing away the expected insn.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr85317.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/i386.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.target/i386/avx2-vpmovmskb-2.c
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Subject: [Bug target/85572] faster code for absolute value of __v2di
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85572
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue May 8 12:16:19 2018
New Revision: 260041
URL: https://gcc.gnu.org/viewcvs?rev=260041&root=gcc&view=rev
Log:
PR target/85572
* config/i386/i386.c (ix86_expand_sse2_abs): Handle E_V2DImode and
E_V4DImode.
* config/i386/sse.md (abs<mode>2): Use VI_AVX2 iterator instead of
VI1248_AVX512VL_AVX512BW. Handle V2DImode and V4DImode if not
TARGET_AVX512VL using ix86_expand_sse2_abs. Formatting fixes.
* g++.dg/other/sse2-pr85572-1.C: New test.
* g++.dg/other/sse2-pr85572-2.C: New test.
* g++.dg/other/sse4-pr85572-1.C: New test.
* g++.dg/other/avx2-pr85572-1.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/other/avx2-pr85572-1.C
trunk/gcc/testsuite/g++.dg/other/sse2-pr85572-1.C
trunk/gcc/testsuite/g++.dg/other/sse2-pr85572-2.C
trunk/gcc/testsuite/g++.dg/other/sse4-pr85572-1.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/i386.c
trunk/gcc/config/i386/sse.md
trunk/gcc/testsuite/ChangeLog
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed for gcc 9+.
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|NEW |RESOLVED
CC| |jakub at gcc dot gnu.org
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed for GCC 9+.
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Subject: [Bug target/85480] zero extension from xmm to zmm via _mm512_insert???x? not optimized
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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CC| |jakub at gcc dot gnu.org
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed for GCC9+.
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From: "Peter.Sewell at cl dot cam.ac.uk" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/61502] == comparison on "one-past" pointer gives wrong result
Date: Tue, 08 May 2018 13:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61502
--- Comment #29 from Peter Sewell <Peter.Sewell at cl dot cam.ac.uk> ---
On 8 May 2018 at 08:22, rguenth at gcc dot gnu.org <gcc-bugzilla@gcc.gnu.org
> wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61502
>
> --- Comment #25 from Richard Biener <rguenth at gcc dot gnu.org> ---
> (In reply to Harald van Dijk from comment #22)
> > (In reply to Andrew Pinski from comment #21)
> > > Invalid as mentioned a few times already but never actually closed
> until now.
> >
> > I posted a strictly conforming program that with GCC does not behave as
> > required by the standard. The issue is valid, even if the original test
> case
> > is not.
>
> If you are talking about the one in comment#12 then this is the same issue
> as present in a few other "similar" bugs where GCC propagates conditional
> equivalences (for example the linked PR65752):
>
> v = &y;
> p = v;
> x = 2, y = 1;
> if (p == &x + 1)
> *p = 2;
>
> is turned into
>
> v = &y;
> p = v;
> x = 2, y = 1;
> if (p == &x + 1)
> *(&x + 1) = 2;
>
> by GCC and the store is then no longer possibly aliasing y.
>
> Conditional equivalences are a difficult thing to exploit for optimization
> and there's some work in progress for the standard regarding to pointer
> provenance which IIRC says that the comparison result of &y == &x + 1
> returns an unspecified value. Not sure if that helps us
FYI, the current state of that work in progress is here:
https://cdn.rawgit.com/C-memory-object-model-study-group/c-mom-sg/master/notes/cmom-0001-2018-05-04-sewell-clarifying-provenance-v4.html
and comments from a GCC perspective would be much appreciated.
It's been informed by useful discussion at the recent WG14 and EuroLLVM
meetings.
Our current proposal indeed makes that comparison an unspecified value -
more
generally, allowing any pointer equality comparison to either take
provenance
into account or not - exactly because we see GCC do so in some cases.
If that isn't important for optimisation, returning to a fully concrete
semantics
for == would be a simpler choice.
but then the
> only way our for GCC for this particular issue would be to never actually
> propagate conditional equivalences.
>
(Conceivably it could be allowed where the compiler can see that the two
have the same provenance. We've no idea how useful that would be.)
>
> Sth that might be worth investigating, but within the current structure of
> the optimization passes that apply this transform it's impossible to decide
> whether a value resulted from conditional equivalences or not... I'm also
> not sure to what extent simplification results using a conditional
> predicate
> like p == &x + 1 are affected as well.
>
> IMHO it's a defect in the language if
>
> p = &y;
> if (p == &x + 1)
> *p = 2;
>
> is valid but
>
> p = &y;
> if (p == &x + 1)
> *(&x + 1) = 2;
>
> is invoking undefined behavior. Or at least a very uncomfortable situation
> for a compiler writer. IMHO the pointer provenance work making the
> comparison having unspecified result doesn't really help since that doesn't
> make it invoke undefined behavior.
>
It's not clear how this could be resolved. For the source-language
semantics,
if one wants to be able to do provenance-based alias analysis, we don't see
any clean way in which the second could be allowed.
And forbidding the first would need one to make == of pointers with
different
provenances UB, which we imagine would break a lot of C code.
That said, in general the intermediate-language semantics might be quite
different
from the C-source-language semantics (as we discover in discussion with
Nuno Lopes
and his colleagues about their LLVM semantics), so long as it implements
the source
semantics.
Peter, Kayvan, Victor
>
> --
> You are receiving this mail because:
> You reported the bug.
>
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Subject: [Bug libstdc++/85672] [9 Regression] error: redefinition of 'constexpr long double std::abs(long double)'
Date: Tue, 08 May 2018 13:05:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85672
--- Comment #13 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Tue May 8 13:05:04 2018
New Revision: 260043
URL: https://gcc.gnu.org/viewcvs?rev=260043&root=gcc&view=rev
Log:
PR libstdc++/85672 #undef _GLIBCXX_USE_FLOAT128 when not supported
Restore the behaviour in GCC 8 and earlier where _GLIBCXX_USE_FLOAT128
is not defined when configure detects support is missing. This avoids
having three states where the macro is either 1, 0, or undefined.
PR libstdc++/85672
* include/Makefile.am [!ENABLE_FLOAT128]: Change c++config.h entry
to #undef _GLIBCXX_USE_FLOAT128 instead of defining it to zero.
* include/Makefile.in: Regenerate.
* include/bits/c++config (_GLIBCXX_USE_FLOAT128): Move definition
within conditional block.
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/Makefile.am
trunk/libstdc++-v3/include/Makefile.in
trunk/libstdc++-v3/include/bits/c++config
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/85597] [6/7/8 Regression] internal compiler error: in compute_live_loop_exits, at tree-ssa-loop-manip.c:229
Date: Tue, 08 May 2018 13:34:00 -0000
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--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue May 8 13:33:54 2018
New Revision: 260044
URL: https://gcc.gnu.org/viewcvs?rev=260044&root=gcc&view=rev
Log:
2018-05-08 Richard Biener <rguenther@suse.de>
Backport from mainline
2018-05-04 Richard Biener <rguenther@suse.de>
PR middle-end/85588
* fold-const.c (negate_expr_p): Restrict negation of operand
zero of a division to when we know that can happen without
overflow.
(fold_negate_expr_1): Likewise.
* gcc.dg/torture/pr85588.c: New testcase.
* gcc.dg/torture/pr57656.c: Use dg-additional-options.
2018-05-03 Richard Biener <rguenther@suse.de>
PR tree-optimization/85615
* tree-ssa-threadupdate.c (thread_block_1): Only allow exits
to loops not nested in BBs loop father to avoid creating multi-entry
loops.
* gcc.dg/torture/pr85615.c: New testcase.
2018-05-02 Richard Biener <rguenther@suse.de>
PR middle-end/85567
* gimplify.c (gimplify_save_expr): When in SSA form allow
SAVE_EXPRs to compute to SSA vars.
* gcc.dg/torture/pr85567.c: New testcase.
2018-05-02 Richard Biener <rguenther@suse.de>
PR tree-optimization/85597
* tree-vect-stmts.c (vectorizable_operation): For ternary SLP
do not use split vect_get_vec_defs call but call vect_get_slp_defs
directly.
* gcc.dg/vect/pr85597.c: New testcase.
Added:
branches/gcc-8-branch/gcc/testsuite/gcc.dg/torture/pr85567.c
branches/gcc-8-branch/gcc/testsuite/gcc.dg/torture/pr85588.c
branches/gcc-8-branch/gcc/testsuite/gcc.dg/torture/pr85615.c
branches/gcc-8-branch/gcc/testsuite/gcc.dg/vect/pr85597.c
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/fold-const.c
branches/gcc-8-branch/gcc/gimplify.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
branches/gcc-8-branch/gcc/testsuite/gcc.dg/torture/pr57656.c
branches/gcc-8-branch/gcc/tree-ssa-threadupdate.c
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Subject: [Bug middle-end/85567] [7/8 Regression] internal compiler error: in gimplify_modify_expr, at gimplify.c:5797 when using sincos()
Date: Tue, 08 May 2018 13:34:00 -0000
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue May 8 13:33:54 2018
New Revision: 260044
URL: https://gcc.gnu.org/viewcvs?rev=260044&root=gcc&view=rev
Log:
2018-05-08 Richard Biener <rguenther@suse.de>
Backport from mainline
2018-05-04 Richard Biener <rguenther@suse.de>
PR middle-end/85588
* fold-const.c (negate_expr_p): Restrict negation of operand
zero of a division to when we know that can happen without
overflow.
(fold_negate_expr_1): Likewise.
* gcc.dg/torture/pr85588.c: New testcase.
* gcc.dg/torture/pr57656.c: Use dg-additional-options.
2018-05-03 Richard Biener <rguenther@suse.de>
PR tree-optimization/85615
* tree-ssa-threadupdate.c (thread_block_1): Only allow exits
to loops not nested in BBs loop father to avoid creating multi-entry
loops.
* gcc.dg/torture/pr85615.c: New testcase.
2018-05-02 Richard Biener <rguenther@suse.de>
PR middle-end/85567
* gimplify.c (gimplify_save_expr): When in SSA form allow
SAVE_EXPRs to compute to SSA vars.
* gcc.dg/torture/pr85567.c: New testcase.
2018-05-02 Richard Biener <rguenther@suse.de>
PR tree-optimization/85597
* tree-vect-stmts.c (vectorizable_operation): For ternary SLP
do not use split vect_get_vec_defs call but call vect_get_slp_defs
directly.
* gcc.dg/vect/pr85597.c: New testcase.
Added:
branches/gcc-8-branch/gcc/testsuite/gcc.dg/torture/pr85567.c
branches/gcc-8-branch/gcc/testsuite/gcc.dg/torture/pr85588.c
branches/gcc-8-branch/gcc/testsuite/gcc.dg/torture/pr85615.c
branches/gcc-8-branch/gcc/testsuite/gcc.dg/vect/pr85597.c
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/fold-const.c
branches/gcc-8-branch/gcc/gimplify.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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branches/gcc-8-branch/gcc/tree-ssa-threadupdate.c
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/85588] [6/7/8 Regression] -fwrapv miscompilation
Date: Tue, 08 May 2018 13:34:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85588
--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue May 8 13:33:54 2018
New Revision: 260044
URL: https://gcc.gnu.org/viewcvs?rev=260044&root=gcc&view=rev
Log:
2018-05-08 Richard Biener <rguenther@suse.de>
Backport from mainline
2018-05-04 Richard Biener <rguenther@suse.de>
PR middle-end/85588
* fold-const.c (negate_expr_p): Restrict negation of operand
zero of a division to when we know that can happen without
overflow.
(fold_negate_expr_1): Likewise.
* gcc.dg/torture/pr85588.c: New testcase.
* gcc.dg/torture/pr57656.c: Use dg-additional-options.
2018-05-03 Richard Biener <rguenther@suse.de>
PR tree-optimization/85615
* tree-ssa-threadupdate.c (thread_block_1): Only allow exits
to loops not nested in BBs loop father to avoid creating multi-entry
loops.
* gcc.dg/torture/pr85615.c: New testcase.
2018-05-02 Richard Biener <rguenther@suse.de>
PR middle-end/85567
* gimplify.c (gimplify_save_expr): When in SSA form allow
SAVE_EXPRs to compute to SSA vars.
* gcc.dg/torture/pr85567.c: New testcase.
2018-05-02 Richard Biener <rguenther@suse.de>
PR tree-optimization/85597
* tree-vect-stmts.c (vectorizable_operation): For ternary SLP
do not use split vect_get_vec_defs call but call vect_get_slp_defs
directly.
* gcc.dg/vect/pr85597.c: New testcase.
Added:
branches/gcc-8-branch/gcc/testsuite/gcc.dg/torture/pr85567.c
branches/gcc-8-branch/gcc/testsuite/gcc.dg/torture/pr85588.c
branches/gcc-8-branch/gcc/testsuite/gcc.dg/torture/pr85615.c
branches/gcc-8-branch/gcc/testsuite/gcc.dg/vect/pr85597.c
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/fold-const.c
branches/gcc-8-branch/gcc/gimplify.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
branches/gcc-8-branch/gcc/testsuite/gcc.dg/torture/pr57656.c
branches/gcc-8-branch/gcc/tree-ssa-threadupdate.c
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Subject: [Bug tree-optimization/85615] [8 Regression] ICE at -O2 and above on valid code on x86_64-linux-gnu: in dfs_enumerate_from, at cfganal.c:1197
Date: Tue, 08 May 2018 13:34:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85615
--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue May 8 13:33:54 2018
New Revision: 260044
URL: https://gcc.gnu.org/viewcvs?rev=260044&root=gcc&view=rev
Log:
2018-05-08 Richard Biener <rguenther@suse.de>
Backport from mainline
2018-05-04 Richard Biener <rguenther@suse.de>
PR middle-end/85588
* fold-const.c (negate_expr_p): Restrict negation of operand
zero of a division to when we know that can happen without
overflow.
(fold_negate_expr_1): Likewise.
* gcc.dg/torture/pr85588.c: New testcase.
* gcc.dg/torture/pr57656.c: Use dg-additional-options.
2018-05-03 Richard Biener <rguenther@suse.de>
PR tree-optimization/85615
* tree-ssa-threadupdate.c (thread_block_1): Only allow exits
to loops not nested in BBs loop father to avoid creating multi-entry
loops.
* gcc.dg/torture/pr85615.c: New testcase.
2018-05-02 Richard Biener <rguenther@suse.de>
PR middle-end/85567
* gimplify.c (gimplify_save_expr): When in SSA form allow
SAVE_EXPRs to compute to SSA vars.
* gcc.dg/torture/pr85567.c: New testcase.
2018-05-02 Richard Biener <rguenther@suse.de>
PR tree-optimization/85597
* tree-vect-stmts.c (vectorizable_operation): For ternary SLP
do not use split vect_get_vec_defs call but call vect_get_slp_defs
directly.
* gcc.dg/vect/pr85597.c: New testcase.
Added:
branches/gcc-8-branch/gcc/testsuite/gcc.dg/torture/pr85567.c
branches/gcc-8-branch/gcc/testsuite/gcc.dg/torture/pr85588.c
branches/gcc-8-branch/gcc/testsuite/gcc.dg/torture/pr85615.c
branches/gcc-8-branch/gcc/testsuite/gcc.dg/vect/pr85597.c
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/fold-const.c
branches/gcc-8-branch/gcc/gimplify.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
branches/gcc-8-branch/gcc/testsuite/gcc.dg/torture/pr57656.c
branches/gcc-8-branch/gcc/tree-ssa-threadupdate.c
branches/gcc-8-branch/gcc/tree-vect-stmts.c
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Subject: [Bug tree-optimization/85615] [8 Regression] ICE at -O2 and above on valid code on x86_64-linux-gnu: in dfs_enumerate_from, at cfganal.c:1197
Date: Tue, 08 May 2018 13:35:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
Known to fail| |8.1.0
--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-604033-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 08 13:40:42 2018
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Subject: [Bug target/85616] ARM target using -O2 may cause unaligned access
Date: Tue, 08 May 2018 13:40:00 -0000
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Denis Roux <denis_second at hotmail dot com> changed:
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----------------------------------------------------------------------------
Resolution|INVALID |FIXED
--- Comment #6 from Denis Roux <denis_second at hotmail dot com> ---
Ok this is a fair assumption from gcc and the result makes total sense. Using
the suggested new type provides code with expected result.
Thank you for taking the time and providing valuable input regarding this
issue.
>From gcc-bugs-return-604034-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 08 13:46:19 2018
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Subject: [Bug libstdc++/85672] [9 Regression] error: redefinition of 'constexpr long double std::abs(long double)'
Date: Tue, 08 May 2018 13:46:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #14 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This should be fixed now.
>From gcc-bugs-return-604035-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 08 13:56:20 2018
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Subject: [Bug tree-optimization/85693] New: Generation of SAD (Sum of Absolute Difference) instruction
Date: Tue, 08 May 2018 13:56:00 -0000
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Bug ID: 85693
Summary: Generation of SAD (Sum of Absolute Difference)
instruction
Product: gcc
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As mentioned in [1], page 7, following code:
--cut here--
#include <stdlib.h>
#define N 1024
unsigned char pix1[N], pix2[N];
int foo (void)
{
int i_sum = 0;
int i;
for (i = 0; i < N; i++)
i_sum += abs (pix1[i] - pix2[i]);
return i_sum;
}
--cut here--
should vectorize to psadbw instruction.
[1]
http://llvm.org/devmtg/2018-04/slides/Das-An%20Introduction%20to%20AMD%20Optimizing%20Compiler.pdf
>From gcc-bugs-return-604036-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 08 14:00:00 2018
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Subject: [Bug tree-optimization/85693] Generation of SAD (Sum of Absolute Difference) instruction
Date: Tue, 08 May 2018 14:00:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |rguenth at gcc dot gnu.org
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
We already do?
> ./cc1 -quiet t.c -O3 -fdump-tree-vect-details -I include
> grep psadbw t.s
psadbw pix2(%rax), %xmm0
>From gcc-bugs-return-604037-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 08 14:04:55 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/85694] New: Generation of vectorized AVG (Average) instruction
Date: Tue, 08 May 2018 14:04:00 -0000
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Bug ID: 85694
Summary: Generation of vectorized AVG (Average) instruction
Product: gcc
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As mentioned in [1], page 12, following code:
--cut here--
#define N 1024
unsigned char src1[N], src2[N], dst[N];
void foo (void)
{
int i;
for (i = 0; i < N; i++)
dst[i] = (src1[i] + src2[i] + 1) >> 1;
}
--cut here--
should vectorize with pavgb instruction.
[1]
http://llvm.org/devmtg/2018-04/slides/Das-An%20Introduction%20to%20AMD%20Optimizing%20Compiler.pdf
>From gcc-bugs-return-604038-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 08 14:05:17 2018
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From: "msharov at users dot sourceforge.net" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/85695] New: if constexpr misevaluates typedefed type value
Date: Tue, 08 May 2018 14:05:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85695
Bug ID: 85695
Summary: if constexpr misevaluates typedefed type value
Product: gcc
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template <typename T, T v>
struct integral_constant {
using value_type = T;
static constexpr const value_type value = v;
constexpr operator value_type (void) const { return value; }
};
template <typename T> struct is_trivial
: public integral_constant<bool, __is_trivial(T)> {};
template <typename T>
T clone_object (const T& p)
{
if constexpr (is_trivial<T>::value)
return p;
else
return p.clone();
}
int main (void) { return clone_object(0); }
This fails to compile: "error: request for member ‘clone’ in ‘p’". The strange
part is that changing the type of integral_constant::value to T makes it work,
as does using is_trivial<T>() in the conditional, invoking the cast operator.
For some reason, value_type is evaluated differently if it is a variable or
return value, and differently from T.
>From gcc-bugs-return-604039-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 08 14:11:46 2018
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Subject: [Bug tree-optimization/85692] Two source permute not used for vector initialization
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85692
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Untested patch:
--- gcc/tree-ssa-forwprop.c.jj 2018-01-04 22:08:04.492684761 +0100
+++ gcc/tree-ssa-forwprop.c 2018-05-08 16:07:09.356121105 +0200
@@ -2004,7 +2004,7 @@ simplify_vector_constructor (gimple_stmt
{
gimple *stmt = gsi_stmt (*gsi);
gimple *def_stmt;
- tree op, op2, orig, type, elem_type;
+ tree op, op2, orig[2], type, elem_type;
unsigned elem_size, i;
unsigned HOST_WIDE_INT nelts;
enum tree_code code, conv_code;
@@ -2023,7 +2023,8 @@ simplify_vector_constructor (gimple_stmt
elem_size = TREE_INT_CST_LOW (TYPE_SIZE (elem_type));
vec_perm_builder sel (nelts, nelts, 1);
- orig = NULL;
+ orig[0] = NULL;
+ orig[1] = NULL;
conv_code = ERROR_MARK;
maybe_ident = true;
FOR_EACH_VEC_SAFE_ELT (CONSTRUCTOR_ELTS (op), i, elt)
@@ -2063,25 +2064,35 @@ simplify_vector_constructor (gimple_stmt
return false;
op1 = gimple_assign_rhs1 (def_stmt);
ref = TREE_OPERAND (op1, 0);
- if (orig)
+ unsigned int j;
+ for (j = 0; j < 2; ++j)
{
- if (ref != orig)
- return false;
- }
- else
- {
- if (TREE_CODE (ref) != SSA_NAME)
- return false;
- if (! VECTOR_TYPE_P (TREE_TYPE (ref))
- || ! useless_type_conversion_p (TREE_TYPE (op1),
- TREE_TYPE (TREE_TYPE (ref))))
- return false;
- orig = ref;
+ if (!orig[j])
+ {
+ if (TREE_CODE (ref) != SSA_NAME)
+ return false;
+ if (! VECTOR_TYPE_P (TREE_TYPE (ref))
+ || ! useless_type_conversion_p (TREE_TYPE (op1),
+ TREE_TYPE (TREE_TYPE (ref))))
+ return false;
+ if (j && !useless_type_conversion_p (TREE_TYPE (orig[0]),
+ TREE_TYPE (ref)))
+ return false;
+ orig[j] = ref;
+ break;
+ }
+ else if (ref == orig[j])
+ break;
}
+ if (j == 2)
+ return false;
+
unsigned int elt;
if (maybe_ne (bit_field_size (op1), elem_size)
|| !constant_multiple_p (bit_field_offset (op1), elem_size, &elt))
return false;
+ if (j)
+ elt += nelts;
if (elt != i)
maybe_ident = false;
sel.quick_push (elt);
@@ -2089,14 +2100,14 @@ simplify_vector_constructor (gimple_stmt
if (i < nelts)
return false;
- if (! VECTOR_TYPE_P (TREE_TYPE (orig))
+ if (! VECTOR_TYPE_P (TREE_TYPE (orig[0]))
|| maybe_ne (TYPE_VECTOR_SUBPARTS (type),
- TYPE_VECTOR_SUBPARTS (TREE_TYPE (orig))))
+ TYPE_VECTOR_SUBPARTS (TREE_TYPE (orig[0]))))
return false;
tree tem;
if (conv_code != ERROR_MARK
- && (! supportable_convert_operation (conv_code, type, TREE_TYPE (orig),
+ && (! supportable_convert_operation (conv_code, type, TREE_TYPE
(orig[0]),
&tem, &conv_code)
|| conv_code == CALL_EXPR))
return false;
@@ -2104,16 +2115,16 @@ simplify_vector_constructor (gimple_stmt
if (maybe_ident)
{
if (conv_code == ERROR_MARK)
- gimple_assign_set_rhs_from_tree (gsi, orig);
+ gimple_assign_set_rhs_from_tree (gsi, orig[0]);
else
- gimple_assign_set_rhs_with_ops (gsi, conv_code, orig,
+ gimple_assign_set_rhs_with_ops (gsi, conv_code, orig[0],
NULL_TREE, NULL_TREE);
}
else
{
tree mask_type;
- vec_perm_indices indices (sel, 1, nelts);
+ vec_perm_indices indices (sel, orig[1] ? 2 : 1, nelts);
if (!can_vec_perm_const_p (TYPE_MODE (type), indices))
return false;
mask_type
@@ -2124,16 +2135,19 @@ simplify_vector_constructor (gimple_stmt
GET_MODE_SIZE (TYPE_MODE (type))))
return false;
op2 = vec_perm_indices_to_tree (mask_type, indices);
+ if (!orig[1])
+ orig[1] = orig[0];
if (conv_code == ERROR_MARK)
- gimple_assign_set_rhs_with_ops (gsi, VEC_PERM_EXPR, orig, orig, op2);
+ gimple_assign_set_rhs_with_ops (gsi, VEC_PERM_EXPR, orig[0],
+ orig[1], op2);
else
{
gimple *perm
- = gimple_build_assign (make_ssa_name (TREE_TYPE (orig)),
- VEC_PERM_EXPR, orig, orig, op2);
- orig = gimple_assign_lhs (perm);
+ = gimple_build_assign (make_ssa_name (TREE_TYPE (orig[0])),
+ VEC_PERM_EXPR, orig[0], orig[1], op2);
+ orig[0] = gimple_assign_lhs (perm);
gsi_insert_before (gsi, perm, GSI_SAME_STMT);
- gimple_assign_set_rhs_with_ops (gsi, conv_code, orig,
+ gimple_assign_set_rhs_with_ops (gsi, conv_code, orig[0],
NULL_TREE, NULL_TREE);
}
}
>From gcc-bugs-return-604040-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 08 14:12:34 2018
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Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #2 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Richard Biener from comment #1)
> We already do?
Oh... indeed. I was looking at system compiler output... X(
>From gcc-bugs-return-604041-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 08 14:12:46 2018
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Subject: [Bug c++/85634] [8/9 Regression] ICE in tsubst_copy, at cp/pt.c:15483
Date: Tue, 08 May 2018 14:12:00 -0000
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Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jason at gcc dot gnu.org
--- Comment #6 from Jason Merrill <jason at gcc dot gnu.org> ---
Here in the template we initialize a pointer with a function name, which is
looked up to an overload set that never gets marked as persistent, which trips
the assert when we go to substitute that initializer. Nathan, how should this
work?
>From gcc-bugs-return-604042-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 08 14:17:23 2018
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Subject: [Bug c/85696] New: OpenMP with variably modified and default(none) won't compile
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85696
Bug ID: 85696
Summary: OpenMP with variably modified and default(none) won't
compile
Product: gcc
Version: 8.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
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Created attachment 44085
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44085&action=edit
gcc -v (Archlinux)
The following trivial code
void foo(int n, int a[][n])
{
#pragma omp parallel shared(a) default(none)
a[23][0] = 42;
}
fails to compile:
$ gcc -c -fopenmp minimal.c
minimal.c: In function ‘foo’:
minimal.c:3:6: error: ‘n.0’ not specified in enclosing ‘parallel’
a[23][0] = 42;
^
minimal.c:2:9: error: enclosing ‘parallel’
#pragma omp parallel shared(a) default(none)
^~~
It appears that there is an internal copy n.0 of n to compute the index to any
further access to a. This internal copy is not handled properly in the
default(none) parallel region.
Interestingly in the 004t.gimple pass, it is actually listed as shared(n.0):
#pragma omp parallel default(none) shared(a) shared(n.0)
The bug exists at least since 4.8 and was first reported at
https://stackoverflow.com/q/47081274/620382
>From gcc-bugs-return-604043-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 08 14:22:32 2018
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Subject: [Bug c/85696] OpenMP with variably modified and default(none) won't compile
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gcc-bugzilla at zulan dot net changed:
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----------------------------------------------------------------------------
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is obsolete| |
--- Comment #1 from gcc-bugzilla at zulan dot net ---
Created attachment 44086
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44086&action=edit
pologies, wrong gcc version. The error of 8.1.0 is exactly the same though.
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Subject: [Bug c/85696] OpenMP with variably modified and default(none) won't compile
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--- Comment #2 from gcc-bugzilla at zulan dot net ---
Created attachment 44087
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minimal example
>From gcc-bugs-return-604045-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 08 14:27:12 2018
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/85694] Generation of vectorized AVG (Average) instruction
Date: Tue, 08 May 2018 14:27:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Target| |x86_64-*-*, i?86-*-*
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-05-08
CC| |rguenth at gcc dot gnu.org
Blocks| |53947
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. Note that in C you are writing 'int' arithmetic which we do not
shorten which confuses us enough to vectorize this with 'int' operations.
The main part, missed pavgb vectorization, is confirmed as well though with
more intelligent vectorization using v16qi vectors combine could come to
the rescue as well here (4 insn combine, so not very likely - also needs
unconditional shift / division support for v16qi).
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53947
[Bug 53947] [meta-bug] vectorizer missed-optimizations
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/85694] Generation of vectorized AVG (Average) instruction
Date: Tue, 08 May 2018 14:29:00 -0000
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Hmm, but if you have 255 + 255 + 1 then you need to use pavgw at least,
otherwise the vectorization isn't semantically equivalent? Or do the
instructions compute
the intermediate results in greater precision than 8 bits? The specification
doesn't seem to tell.
Can you clarify?
>From gcc-bugs-return-604047-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 08 14:47:38 2018
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Subject: [Bug tree-optimization/85692] Two source permute not used for vector initialization
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--- Comment #4 from Allan Jensen <linux at carewolf dot com> ---
Note I already posted a patch on gcc-patches myself. It is very similar to
yours
>From gcc-bugs-return-604048-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 08 14:48:55 2018
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Subject: [Bug tree-optimization/85692] Two source permute not used for vector initialization
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--- Comment #5 from Allan Jensen <linux at carewolf dot com> ---
Created attachment 44088
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44088&action=edit
suggested patch
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Subject: [Bug ipa/85103] [8/9 Regression] Performance regressions on SPEC with r257582
Date: Tue, 08 May 2018 14:50:00 -0000
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--- Comment #9 from David Edelsohn <dje at gcc dot gnu.org> ---
Confirmed.
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Subject: [Bug target/85697] New: At -Os nontrivial ctor does not use SSE to zero
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Bug ID: 85697
Summary: At -Os nontrivial ctor does not use SSE to zero
Product: gcc
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struct alignas(16) A {
A (void) :a(0),b(0),c(0),d(0) {}
int a,b,c,d;
};
__attribute__((noinline)) void UseA (A& a) { a.a=1; }
int main (void)
{
A a {};
UseA (a);
return a.a;
}
-Os -march=native on Haswell, generates:
main:
subq $16, %rsp
movq %rsp, %rdi
movq $0, (%rsp)
movq $0, 8(%rsp)
call _Z4UseAR1A
movl (%rsp), %eax
addq $16, %rsp
ret
Using 16 bytes to zero A with 2 movq. With -O3:
main:
subq $24, %rsp
vpxor %xmm0, %xmm0, %xmm0
movq %rsp, %rdi
vmovaps %xmm0, (%rsp)
call _Z4UseAR1A
movl (%rsp), %eax
addq $24, %rsp
ret
using only 9 bytes for pxor/movaps. With -mno-avx it is 7 bytes for
xorps/movaps. With multiple objects of type A, the savings would be even
greater, since only one pxor would be needed for all and only 4 bytes per
object for zeroing.
Removing A constructor also results in SSE instruction use.
>From gcc-bugs-return-604051-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 08 14:55:27 2018
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Subject: [Bug tree-optimization/85698] New: CPU2017 525.x264_r fails starting with r257581
Date: Tue, 08 May 2018 14:55:00 -0000
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Bug ID: 85698
Summary: CPU2017 525.x264_r fails starting with r257581
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
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CC: rguenth at gcc dot gnu.org, segher at kernel dot crashing.org,
wschmidt at gcc dot gnu.org
Target Milestone: ---
Host: powerpc64le-unknown-linux-gnu
Target: powerpc64le-unknown-linux-gnu
Build: powerpc64le-unknown-linux-gnu
Benchmark miscompares starting with given revision. Options used for building
the benchmark are "-O3 -mcpu=power8". I did discover that adding -funroll-loops
changes behavior such that the benchmark passes.
Continuing to see if I can narrow down to a specific file that's miscompiled...
>From gcc-bugs-return-604052-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 08 15:13:07 2018
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Subject: [Bug tree-optimization/85699] New: [8 regression] gcc.dg/nextafter-2.c fail
Date: Tue, 08 May 2018 15:13:00 -0000
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Bug ID: 85699
Summary: [8 regression] gcc.dg/nextafter-2.c fail
Product: gcc
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r259921 triggers this:
spawn -ignore SIGHUP /work/gcc/xgcc -B/work/gcc/
/source/gcc/testsuite/gcc.dg/nextafter-2.c -fno-diagnostics-show-caret
-fdiagnostics-color=never -O2 -fno-builtin -lm -o ./nextafter-2.exe
PASS: gcc.dg/nextafter-2.c (test for excess errors)
spawn [open ...]
FAIL: gcc.dg/nextafter-2.c execution test
Option set:
-with-system-zlib --with-demangler-in-ld --with-fpmath=sse --enable-shared
--enable-host-shared --enable-clocale=gnu --enable-cloog-backend=isl
--enable-languages=c,c++,fortran,jit,lto -with-arch=haswell --with-cpu=haswell
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Subject: [Bug c++/85695] if constexpr misevaluates typedefed type value
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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Subject: [Bug tree-optimization/85699] [9 regression] gcc.dg/nextafter-2.c fail
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[8 regression] |[9 regression]
|gcc.dg/nextafter-2.c fail |gcc.dg/nextafter-2.c fail
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
First of all, this test isn't present on 8 branch at all, only trunk.
And, this exact testcase uses -fno-builtin and thus tests the library, so if it
fails, likely your libc is buggy.
Which exact subtest fails for you?
E.g. replace
#define CHECK(x) if (!(x)) __builtin_abort ()
with
#define CHECK(x) if (!(x)) __builtin_printf ("bug at %d %s\n", __LINE__, #x);
and see what it prints?
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Subject: [Bug c++/85695] [8/9 Regression] if constexpr misevaluates typedefed type value
Date: Tue, 08 May 2018 16:14:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mpolacek at gcc dot gnu.org
Target Milestone|--- |8.2
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Started with r258756
PR c++/84854
* semantics.c (finish_if_stmt_cond): Check if the type of the
condition
is boolean.
* g++.dg/cpp1z/constexpr-if15.C: New test.
* g++.dg/cpp1z/constexpr-if16.C: New test.
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Subject: [Bug target/85683] [8/9 Regression] GCC 8 stopped using RMW (Read Modify Write) instructions on x86[_64]
Date: Tue, 08 May 2018 16:18:00 -0000
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue May 8 16:17:34 2018
New Revision: 260045
URL: https://gcc.gnu.org/viewcvs?rev=260045&root=gcc&view=rev
Log:
PR target/85683
* config/i386/i386.md: Add peepholes for mem {+,-,&,|,^}= x; mem != 0
after cmpelim optimization.
* gcc.target/i386/pr49095.c: Add -masm=att to dg-options. Add
scan-assembler-times checking that except for [fh]*xor other functions
don't use any load instructions.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/i386.md
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.target/i386/pr49095.c
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Subject: [Bug tree-optimization/85694] Generation of vectorized AVG (Average) instruction
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--- Comment #3 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Richard Biener from comment #2)
> Hmm, but if you have 255 + 255 + 1 then you need to use pavgw at least,
> otherwise the vectorization isn't semantically equivalent? Or do the
> instructions compute
> the intermediate results in greater precision than 8 bits? The specification
> doesn't seem to tell.
>
> Can you clarify?
According to [1], intermediate result has 9 bit precision for pavgb and 17bit
precision for pavgw.
[1] http://www.felixcloutier.com/x86/PAVGB:PAVGW.html
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Subject: [Bug target/85683] [8 Regression] GCC 8 stopped using RMW (Read Modify Write) instructions on x86[_64]
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[8/9 Regression] GCC 8 |[8 Regression] GCC 8
|stopped using RMW (Read |stopped using RMW (Read
|Modify Write) instructions |Modify Write) instructions
|on x86[_64] |on x86[_64]
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed for GCC9 so far, will backport to 8.2 after a while.
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Subject: [Bug c++/85695] [8/9 Regression] if constexpr misevaluates typedefed type value
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This fixes it:
--- a/gcc/cp/semantics.c
+++ b/gcc/cp/semantics.c
@@ -736,7 +736,7 @@ finish_if_stmt_cond (tree cond, tree if_stmt)
&& !instantiation_dependent_expression_p (cond)
/* Wait until instantiation time, since only then COND has been
converted to bool. */
- && TREE_TYPE (cond) == boolean_type_node)
+ && strip_typedefs (TREE_TYPE (cond)) == boolean_type_node)
{
cond = instantiate_non_dependent_expr (cond);
cond = cxx_constant_value (cond, NULL_TREE);
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Subject: [Bug c++/85700] New: Spurious -Wstringop-truncation warning with strncat
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Bug ID: 85700
Summary: Spurious -Wstringop-truncation warning with strncat
Product: gcc
Version: 8.1.0
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Target Milestone: ---
Test program:
---
#include <cstring>
#include <cstdio>
char buf1[256];
void append(const char *s)
{
std::strncat(buf1, s, sizeof(buf1) - strlen(buf1) - 1);
}
void doit(int err)
{
char tmp[256];
std::snprintf(tmp, sizeof(tmp), " errno %d (%s)",
err, std::strerror(err));
append(tmp);
}
---
Compile with "g++ -O3 -Wall -c test.cc".
Expected results:
No warning, as the documentation says for this idiomatic use of strncat().
Actual results:
In function ‘void append(const char*)’,
inlined from ‘void doit(int)’ at test.cc:16:9:
test.cc:8:15: warning: ‘char* strncat(char*, const char*, size_t)’ output may
b\
e truncated copying between 0 and 255 bytes from a string of length 255
[-Wstri\
ngop-truncation]
std::strncat(buf1, s, sizeof(buf1) - strlen(buf1) - 1);
~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Note that a similar program in C does not trigger the warning.
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Subject: [Bug tree-optimization/85693] Generation of SAD (Sum of Absolute Difference) instruction
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--- Comment #3 from uros at gcc dot gnu.org ---
Author: uros
Date: Tue May 8 16:48:43 2018
New Revision: 260047
URL: https://gcc.gnu.org/viewcvs?rev=260047&root=gcc&view=rev
Log:
PR target/85693
* gcc.target/i386/pr85693.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr85693.c
Modified:
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug tree-optimization/85693] Generation of SAD (Sum of Absolute Difference) instruction
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Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|INVALID |FIXED
--- Comment #4 from Uroš Bizjak <ubizjak at gmail dot com> ---
Target specific testcase that checks psadbw insn generation committed.
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Subject: [Bug c++/85695] [8/9 Regression] if constexpr misevaluates typedefed type value
Date: Tue, 08 May 2018 17:13:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85695
Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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>From gcc-bugs-return-604064-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 08 17:26:01 2018
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Subject: [Bug tree-optimization/85651] Invalid -Warray-bounds warning with -O3
Date: Tue, 08 May 2018 17:26:00 -0000
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--- Comment #3 from Gabriel Burca <gburca-gnu at ebixio dot com> ---
Does that also fix the issue with the ignored diagnostic pragmas?
>From gcc-bugs-return-604065-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 08 17:44:39 2018
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/85700] Spurious -Wstringop-truncation warning with strncat
Date: Tue, 08 May 2018 17:44:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85700
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-05-08
CC| |msebor at gcc dot gnu.org
Component|c++ |tree-optimization
Ever confirmed|0 |1
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed. Strncat is handled in maybe_diag_stxncpy_trunc() the same way as
strncpy and the approach doesn't seem right for the former. The following test
case shows the inconsistency. (The difference between C and C++ is due to the
C <string.h> defining strncat as a macro which suppresses the warning due to
-Wno-system-headers; in C++, strncat is defined as a function so
-Wno-system-headers has no effect on calls to it.)
$ cat u.c && gcc -O2 -S -Wall -ftrack-macro-expansion=0 /build/tmp/u.c
#define strncat __builtin_strncat
#define strlen __builtin_strlen
char a[4], b[4];
void f1 (void)
{
strncat (a, "1", sizeof a - strlen (a) - 1); // no warning (good)
}
void f2 (void)
{
strncat (a, "12", sizeof a - strlen (a) - 1); // bogus -Wstringop-truncation
}
void fx (void)
{
strncat (a, b, sizeof a - strlen (a) - 1); // bogus -Wstringop-truncation
}
/build/tmp/u.c: In function ‘f2’:
/build/tmp/u.c:13:3: warning: ‘__builtin_strncat’ output may be truncated
copying between 0 and 3 bytes from a string of length 2 [-Wstringop-truncation]
strncat (a, "12", sizeof a - strlen (a) - 1); // bogus
-Wstringop-truncation
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/build/tmp/u.c: In function ‘fx’:
/build/tmp/u.c:18:3: warning: ‘__builtin_strncat’ output may be truncated
copying between 0 and 3 bytes from a string of length 3 [-Wstringop-truncation]
strncat (a, b, sizeof a - strlen (a) - 1); // bogus
-Wstringop-truncation
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>From gcc-bugs-return-604066-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 08 17:45:45 2018
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Subject: [Bug tree-optimization/85700] Spurious -Wstringop-truncation warning with strncat
Date: Tue, 08 May 2018 17:45:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Let me look into it.
>From gcc-bugs-return-604067-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 08 17:45:59 2018
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Subject: [Bug c++/85363] Throwing exception from member constructor (brace initializer vs initializer list)
Date: Tue, 08 May 2018 17:45:00 -0000
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--- Comment #5 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
In C++11, .eh optimizes out the catch, so the exception is never caught. That
is because lower_catch doesn't think that the region may throw
(eh_region_may_contain_throw).
After further poking it seems the cause is that P::P () is marked as
TREE_NOTHROW, which seems incorrect, because it calls X::X() which calls init()
with throw. That TREE_NOTHROW is set in finish_function:
/* If this function can't throw any exceptions, remember that. */
if (!processing_template_decl
&& !cp_function_chain->can_throw
&& !flag_non_call_exceptions
&& !decl_replaceable_p (fndecl))
TREE_NOTHROW (fndecl) = 1;
>From gcc-bugs-return-604068-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 08 17:56:50 2018
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Subject: [Bug tree-optimization/85651] Invalid -Warray-bounds warning with -O3
Date: Tue, 08 May 2018 17:56:00 -0000
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--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
I'm afraid the pragma problem is an independent bug that affects many/most
middle-end warnings (see, for example, the test case below). It will require a
different and likely more involved change.
$ cat u.c && gcc -O2 -S -Wall u.c
int f (int i)
{
return "123"[i];
}
int g (void)
{
#pragma GCC diagnostic ignored "-Warray-bounds"
return f (4);
}
u.c: In function ‘g’:
u.c:3:15: warning: array subscript 4 is above array bounds of ‘char[4]’
[-Warray-bounds]
return "123"[i];
~~~~~^~~
>From gcc-bugs-return-604069-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 08 18:04:16 2018
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Subject: [Bug tree-optimization/85651] Invalid -Warray-bounds warning with -O3
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=55881
--- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
Pr55881 tracks the pragma diagnostic bug.
>From gcc-bugs-return-604070-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 08 18:06:40 2018
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From: "pthaugen at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/85698] CPU2017 525.x264_r fails starting with r257581
Date: Tue, 08 May 2018 18:06:00 -0000
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--- Comment #1 from Pat Haugen <pthaugen at gcc dot gnu.org> ---
Looks like benchmark fails when x264_src/common/dct.c is compiled with r257581.
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From: =?UTF-8?B?RMOhdmlkIEJvbHZhbnNrw70=?= <david.bolvansky@gmail.com>
Date: Tue, 08 May 2018 18:07:00 -0000
Message-ID: <CAOrgDVNqk+YVFXqvkw9EYUDsjer_XeDN2AwY9TqWzGcP4qduqA@mail.gmail.com>
Subject: Reduntant move
To: gcc-bugs@gcc.gnu.org
Content-Type: text/plain; charset="UTF-8"
X-SW-Source: 2018-05/txt/msg00966.txt.bz2
Content-length: 491
Hello,
Code example:
#include <stdio.h>
char * a(int e) {
char * s;
switch (e) {
case 0:
s = "0";
break;
case 1:
s = "1";
break;
case 2:
s = "2";
break;
default:
s = "def";
break;
}
return s;
}
GCC 8.1:
a:
mov eax, OFFSET FLAT:.LC0
cmp edi, 2
ja .L1
mov edi, edi <------ redundant?
mov rax, QWORD PTR CSWTCH.0[0+rdi*8]
.L1:
ret
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