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* [Bug fortran/81205] Hybrid MPI and OpenMp: Blocking code in loops
[not found] <bug-81205-4@http.gcc.gnu.org/bugzilla/>
@ 2019-11-26 20:16 ` anlauf at gcc dot gnu.org
0 siblings, 0 replies; only message in thread
From: anlauf at gcc dot gnu.org @ 2019-11-26 20:16 UTC (permalink / raw)
To: gcc-bugs
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81205
anlauf at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |INVALID
--- Comment #9 from anlauf at gcc dot gnu.org ---
(In reply to Dominique d'Humieres from comment #8)
> > I will try and will let you now.
>
> Any progress?
No progress in 2.5 years. Closing as invalid.
>From gcc-bugs-return-661440-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 26 20:19:42 2019
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/92642] Enhance shift-count-overflow output
Date: Tue, 26 Nov 2019 20:19:00 -0000
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--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Jonny Grant from comment #4)
> This test case for similar does have a nice warning.
>
> Interestingly, G++ does not indicate that 5147483647 is already 34 bits long:
> 100110010110100000101110111111111
> which is more than an 'int' (32bit) which as Jonathan has highlighted, to be
> the way numbers are treated in C/C++ when they do not have UL suffix.
C changed with C99 and C++ changed with C++11 (IIRC) when it comes to literals.
>From gcc-bugs-return-661441-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 26 20:21:54 2019
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/92673] OCaml fails to link with recent trunk
Date: Tue, 26 Nov 2019 20:21:00 -0000
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--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Jürgen Reuter from comment #2)
> (In reply to Richard Biener from comment #1)
> > Try -fcommon, it's default recently was swapped to -fno-common.
>
> The default for gcc was changed? Which commit was this? I cannot find any
> reference in the ChangeLog.
https://gcc.gnu.org/ml/gcc-cvs/2019-11/msg00825.html
>From gcc-bugs-return-661442-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 26 20:22:54 2019
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From: "iains at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/92661] [10 Regression] Bootstrap failure with builtin-types.def change
Date: Tue, 26 Nov 2019 20:22:00 -0000
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--- Comment #6 from Iain Sandoe <iains at gcc dot gnu.org> ---
the patch at comment #5 works for powerpc-darwin9, test output looks "nominal"
(given that there's a lot of recent regression/new fails anyway)
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From: "tkoenig at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/92682] New: [10 Regression] maxlocval_4.f90 / minlocval_4.f90 failure on POWER9
Date: Tue, 26 Nov 2019 20:28:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92682
Bug ID: 92682
Summary: [10 Regression] maxlocval_4.f90 / minlocval_4.f90
failure on POWER9
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
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Component: target
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https://gcc.gnu.org/ml/gcc-testresults/2019-10/msg01757.html (r277518)
has
FAIL: gfortran.dg/maxlocval_4.f90 -O2 execution test
FAIL: gfortran.dg/minlocval_4.f90 -O2 execution test
while https://gcc.gnu.org/ml/gcc-testresults/2019-10/msg01701.html
(r277488) appears clean.
It appears to be specific to POWER9, POWER7 and POWER8 do not
appear to have that particular failure.
I'll look for a bit (this is one of my test cases).
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Subject: [Bug c++/48078] accepts-invalid: taking address of private member function from template function
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fkostenzer at live dot at changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |fkostenzer at live dot at
--- Comment #6 from fkostenzer at live dot at ---
This can also be triggered on gcc 9 using
```
class A
{
int foo() const { return 42; }
};
template<typename T=void>
struct B : public A
{
static constexpr auto member_fn = &B::foo;
};
int main()
{
return (A().*B<>::member_fn)();
}
```
running `g++ -std=c++17 -O2 -Wall -Wextra` produces
main:
mov eax, 42
ret
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Subject: [Bug target/92682] [10 Regression] maxlocval_4.f90 / minlocval_4.f90 failure on POWER9
Date: Tue, 26 Nov 2019 21:21:00 -0000
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2019-11-26
CC| |seurer at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Hmmm... seems like a local problem with the test result setup. I can
not reproduce this on gcc135.fsffrance.org.
Bill, since I based this on your results (possibly prematurely): Could
you maybe check your setup what is going on here?
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Subject: [Bug libfortran/92100] Formatted stream IO irreproducible read with binary data in file
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--- Comment #11 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
> Modified:
> trunk/gcc/ChangeLog
Hi hit the wrong log file for the testsuite entry. It has been fixed.
>From gcc-bugs-return-661447-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 26 21:58:04 2019
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Subject: [Bug c++/61414] enum class bitfield size-checking needs a separate warning flag controlling it
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--- Comment #23 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Nov 26 21:57:27 2019
New Revision: 278736
URL: https://gcc.gnu.org/viewcvs?rev=278736&root=gcc&view=rev
Log:
PR c++/61414
* c-attribs.c (handle_mode_attribute): Add mode attribute to
ENUMERAL_TYPEs.
* class.c (enum_to_min_precision): New hash_map.
(enum_min_precision): New function.
(check_bitfield_decl): Use it.
* g++.dg/cpp0x/enum23.C: Remove xfail.
* g++.dg/cpp0x/enum28.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/enum38.C
Modified:
trunk/gcc/c-family/ChangeLog
trunk/gcc/c-family/c-attribs.c
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/class.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/g++.dg/cpp0x/enum23.C
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Subject: [Bug c++/92648] Handling of unknown attributes
Date: Tue, 26 Nov 2019 21:58:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92648
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Nov 26 21:58:22 2019
New Revision: 278737
URL: https://gcc.gnu.org/viewcvs?rev=278737&root=gcc&view=rev
Log:
PR c++/92648
* parser.c (cp_parser_std_attribute): For unknown attributes,
skip balanced token seq instead of trying to parse
attribute-argument-clause as expression list. Formatting fix.
* g++.dg/cpp0x/gen-attrs-71.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/gen-attrs-71.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/parser.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug testsuite/92391] gcc.dg/vect/bb-slp-40.c FAILs
Date: Tue, 26 Nov 2019 22:12:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92391
--- Comment #12 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
Author: rsandifo
Date: Tue Nov 26 22:11:39 2019
New Revision: 278738
URL: https://gcc.gnu.org/viewcvs?rev=278738&root=gcc&view=rev
Log:
Update vect_char_add target selector to use its own cache
This patch updates the vect_char_add target selector to use its own
cache instead of the vect_int cache.
This was causing a situation where bb-slp-40.c would fail on sparc when
run after other tests that use the vect_int target selector, but pass
when run on its own.
2019-11-26 Joel Hutton <Joel.Hutton@arm.com>
gcc/testsuite/
PR testsuite/92391
* lib/target-supports.exp (check_effective_target_vect_char_add):
Use a separate cache entry from vect_int.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/lib/target-supports.exp
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/92683] New: [10 Regression] strncmp incorrect result with equal substrings and non-const bound
Date: Tue, 26 Nov 2019 22:31:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92683
Bug ID: 92683
Summary: [10 Regression] strncmp incorrect result with equal
substrings and non-const bound
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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r278621 introduced a bug where a non-constant bound in calls to strncmp is
treated incorrectly as if it were a constant greater than the length of either
argument.
$ cat t.c && gcc -O1 -S -Wall -Wextra -Wunused
-fdump-tree-forwprop1=/dev/stdout t.c
int f (void)
{
return __builtin_strncmp ("123", "1234", 3); // correctly folded to zero
}
int g (void)
{
int n = 3;
return __builtin_strncmp ("123", "1234", n); // incorrectly folded to -1
}
;; Function f (f, funcdef_no=0, decl_uid=1930, cgraph_uid=1, symbol_order=0)
f ()
{
<bb 2> :
return 0;
}
;; Function g (g, funcdef_no=1, decl_uid=1933, cgraph_uid=2, symbol_order=1)
g ()
{
int n;
<bb 2> :
return -1;
}
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Subject: [Bug tree-optimization/92683] [10 Regression] strncmp incorrect result with equal substrings and non-const bound
Date: Tue, 26 Nov 2019 22:32:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2019-11-26
Blocks| |83819
Assignee|unassigned at gcc dot gnu.org |msebor at gcc dot gnu.org
Target Milestone|--- |10.0
Ever confirmed|0 |1
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83819
[Bug 83819] [meta-bug] missing strlen optimizations
>From gcc-bugs-return-661452-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 26 22:42:10 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug testsuite/92622] FAIL: gcc.dg/Warray-bounds-22.c on ILP32: missing warnings for VLA on lines 67 and 69
Date: Tue, 26 Nov 2019 22:42:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92622
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
The failure doesn't seem to be reliably reproducible. Of the three times the
script below runs the test it fails just once.
$ for i in 1 2 3; do nice time make -C /build/gcc-git-svn/gcc check-c
'CFLAGS=-O0 -g3' 'CXXFLAGS=-O0 -g3' 'STAGE1_CFLAGS=-O0 -g3'
'STAGE1_CXXFLAGS=-O0 -g3' RUNTESTFLAGS="dg.exp=Warray-bounds-22.c
--target_board=unix/-m32"; done
make: Entering directory '/ssd/build/gcc-git-svn/gcc'
rm -rf testsuite/gcc-parallel
make[1]: Entering directory '/ssd/build/gcc-git-svn/gcc'
(rootme=`${PWDCMD-pwd}`; export rootme; \
srcdir=`cd /src/gcc/git-svn/gcc; ${PWDCMD-pwd}` ; export srcdir ; \
if [ -n "" ] \
&& [ -n "$GCC_RUNTEST_PARALLELIZE_DIR" ] \
&& [ -f testsuite/gcc-parallel/finished ]; then \
rm -rf testsuite/gcc; \
else \
cd testsuite/gcc; \
rm -f tmp-site.exp; \
sed '/set tmpdir/ s|testsuite$|testsuite/gcc|' \
< ../../site.exp > tmp-site.exp; \
/bin/sh ${srcdir}/../move-if-change tmp-site.exp site.exp; \
EXPECT=`if [ -f ${rootme}/../expect/expect ] ; then echo
${rootme}/../expect/expect ; else echo expect ; fi` ; export EXPECT ; \
if [ -f ${rootme}/../expect/expect ] ; then \
TCL_LIBRARY=`cd .. ; cd ${srcdir}/../tcl/library ; ${PWDCMD-pwd}` ; \
export TCL_LIBRARY ; \
fi ; \
`if [ -f ${srcdir}/../dejagnu/runtest ] ; then echo
${srcdir}/../dejagnu/runtest ; else echo runtest; fi` --tool gcc
dg.exp=Warray-bounds-22.c --target_board=unix/-m32; \
if [ -n "$GCC_RUNTEST_PARALLELIZE_DIR" ] ; then \
touch ${rootme}/testsuite/gcc-parallel/finished; \
fi ; \
fi )
WARNING: Couldn't find the global config file.
Test run by msebor on Tue Nov 26 15:39:30 2019
Native configuration is x86_64-pc-linux-gnu
=== gcc tests ===
Schedule of variations:
unix/-m32
Running target unix/-m32
Using /usr/share/dejagnu/baseboards/unix.exp as board description file for
target.
Using /usr/share/dejagnu/config/unix.exp as generic interface file for target.
Using /src/gcc/git-svn/gcc/testsuite/config/default.exp as
tool-and-target-specific interface file.
Running /src/gcc/git-svn/gcc/testsuite/gcc.dg/dg.exp ...
=== gcc Summary ===
# of expected passes 15
# of expected failures 8
/ssd/build/gcc-git-svn/gcc/xgcc version 10.0.0 20191126 (experimental) (GCC)
make[1]: Leaving directory '/ssd/build/gcc-git-svn/gcc'
make: Leaving directory '/ssd/build/gcc-git-svn/gcc'
0.63user 0.14system 0:00.94elapsed 83%CPU (0avgtext+0avgdata 39292maxresident)k
0inputs+128outputs (0major+60721minor)pagefaults 0swaps
make: Entering directory '/ssd/build/gcc-git-svn/gcc'
rm -rf testsuite/gcc-parallel
make[1]: Entering directory '/ssd/build/gcc-git-svn/gcc'
(rootme=`${PWDCMD-pwd}`; export rootme; \
srcdir=`cd /src/gcc/git-svn/gcc; ${PWDCMD-pwd}` ; export srcdir ; \
if [ -n "" ] \
&& [ -n "$GCC_RUNTEST_PARALLELIZE_DIR" ] \
&& [ -f testsuite/gcc-parallel/finished ]; then \
rm -rf testsuite/gcc; \
else \
cd testsuite/gcc; \
rm -f tmp-site.exp; \
sed '/set tmpdir/ s|testsuite$|testsuite/gcc|' \
< ../../site.exp > tmp-site.exp; \
/bin/sh ${srcdir}/../move-if-change tmp-site.exp site.exp; \
EXPECT=`if [ -f ${rootme}/../expect/expect ] ; then echo
${rootme}/../expect/expect ; else echo expect ; fi` ; export EXPECT ; \
if [ -f ${rootme}/../expect/expect ] ; then \
TCL_LIBRARY=`cd .. ; cd ${srcdir}/../tcl/library ; ${PWDCMD-pwd}` ; \
export TCL_LIBRARY ; \
fi ; \
`if [ -f ${srcdir}/../dejagnu/runtest ] ; then echo
${srcdir}/../dejagnu/runtest ; else echo runtest; fi` --tool gcc
dg.exp=Warray-bounds-22.c --target_board=unix/-m32; \
if [ -n "$GCC_RUNTEST_PARALLELIZE_DIR" ] ; then \
touch ${rootme}/testsuite/gcc-parallel/finished; \
fi ; \
fi )
WARNING: Couldn't find the global config file.
Test run by msebor on Tue Nov 26 15:39:31 2019
Native configuration is x86_64-pc-linux-gnu
=== gcc tests ===
Schedule of variations:
unix/-m32
Running target unix/-m32
Using /usr/share/dejagnu/baseboards/unix.exp as board description file for
target.
Using /usr/share/dejagnu/config/unix.exp as generic interface file for target.
Using /src/gcc/git-svn/gcc/testsuite/config/default.exp as
tool-and-target-specific interface file.
Running /src/gcc/git-svn/gcc/testsuite/gcc.dg/dg.exp ...
FAIL: gcc.dg/Warray-bounds-22.c vla (test for warnings, line 67)
FAIL: gcc.dg/Warray-bounds-22.c vla (test for warnings, line 69)
=== gcc Summary ===
# of expected passes 13
# of unexpected failures 2
# of expected failures 8
/ssd/build/gcc-git-svn/gcc/xgcc version 10.0.0 20191126 (experimental) (GCC)
make[1]: Leaving directory '/ssd/build/gcc-git-svn/gcc'
make: Leaving directory '/ssd/build/gcc-git-svn/gcc'
0.65user 0.13system 0:00.94elapsed 83%CPU (0avgtext+0avgdata 39368maxresident)k
0inputs+128outputs (0major+60706minor)pagefaults 0swaps
make: Entering directory '/ssd/build/gcc-git-svn/gcc'
rm -rf testsuite/gcc-parallel
make[1]: Entering directory '/ssd/build/gcc-git-svn/gcc'
(rootme=`${PWDCMD-pwd}`; export rootme; \
srcdir=`cd /src/gcc/git-svn/gcc; ${PWDCMD-pwd}` ; export srcdir ; \
if [ -n "" ] \
&& [ -n "$GCC_RUNTEST_PARALLELIZE_DIR" ] \
&& [ -f testsuite/gcc-parallel/finished ]; then \
rm -rf testsuite/gcc; \
else \
cd testsuite/gcc; \
rm -f tmp-site.exp; \
sed '/set tmpdir/ s|testsuite$|testsuite/gcc|' \
< ../../site.exp > tmp-site.exp; \
/bin/sh ${srcdir}/../move-if-change tmp-site.exp site.exp; \
EXPECT=`if [ -f ${rootme}/../expect/expect ] ; then echo
${rootme}/../expect/expect ; else echo expect ; fi` ; export EXPECT ; \
if [ -f ${rootme}/../expect/expect ] ; then \
TCL_LIBRARY=`cd .. ; cd ${srcdir}/../tcl/library ; ${PWDCMD-pwd}` ; \
export TCL_LIBRARY ; \
fi ; \
`if [ -f ${srcdir}/../dejagnu/runtest ] ; then echo
${srcdir}/../dejagnu/runtest ; else echo runtest; fi` --tool gcc
dg.exp=Warray-bounds-22.c --target_board=unix/-m32; \
if [ -n "$GCC_RUNTEST_PARALLELIZE_DIR" ] ; then \
touch ${rootme}/testsuite/gcc-parallel/finished; \
fi ; \
fi )
WARNING: Couldn't find the global config file.
Test run by msebor on Tue Nov 26 15:39:32 2019
Native configuration is x86_64-pc-linux-gnu
=== gcc tests ===
Schedule of variations:
unix/-m32
Running target unix/-m32
Using /usr/share/dejagnu/baseboards/unix.exp as board description file for
target.
Using /usr/share/dejagnu/config/unix.exp as generic interface file for target.
Using /src/gcc/git-svn/gcc/testsuite/config/default.exp as
tool-and-target-specific interface file.
Running /src/gcc/git-svn/gcc/testsuite/gcc.dg/dg.exp ...
=== gcc Summary ===
# of expected passes 15
# of expected failures 8
/ssd/build/gcc-git-svn/gcc/xgcc version 10.0.0 20191126 (experimental) (GCC)
make[1]: Leaving directory '/ssd/build/gcc-git-svn/gcc'
make: Leaving directory '/ssd/build/gcc-git-svn/gcc'
0.64user 0.14system 0:00.93elapsed 83%CPU (0avgtext+0avgdata 39232maxresident)k
0inputs+128outputs (0major+60708minor)pagefaults 0swaps
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Subject: [Bug libfortran/92100] Formatted stream IO irreproducible read with binary data in file
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92100
--- Comment #12 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Author: jvdelisle
Date: Tue Nov 26 22:56:24 2019
New Revision: 278740
URL: https://gcc.gnu.org/viewcvs?rev=278740&root=gcc&view=rev
Log:
2019-11-26 Jerry DeLisle <jvdelisle@gcc.ngu.org>
Backport from mainline
PR fortran/92100
io/transfer.c (data_transfer_init_worker): Use fbuf_reset
instead of fbuf_flush before the seek. Note that fbuf_reset
calls fbuf_flush and adjusts fbuf pointers.
gfortran.dg/streamio_18.f90: New test.
Added:
branches/gcc-9-branch/gcc/testsuite/gfortran.dg/streamio_18.f90
Modified:
branches/gcc-9-branch/gcc/testsuite/ChangeLog
branches/gcc-9-branch/libgfortran/ChangeLog
branches/gcc-9-branch/libgfortran/io/transfer.c
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From: "joseph at codesourcery dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/92671] gcc/c/c-parser.c: minor ( and ) tidyup
Date: Tue, 26 Nov 2019 23:07:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92671
--- Comment #1 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
I don't think this is a confusing case of precedence, i.e. the proposed
change is not an improvement.
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/92683] [10 Regression] strncmp incorrect result with equal substrings and non-const bound
Date: Tue, 26 Nov 2019 23:56:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92683
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Tue Nov 26 23:56:22 2019
New Revision: 278742
URL: https://gcc.gnu.org/viewcvs?rev=278742&root=gcc&view=rev
Log:
PR tree-optimization/92683 - strncmp incorrect result with equal substrings and
non-const bound
gcc/testsuite/ChangeLog:
PR tree-optimization/92683
* gcc.dg/strcmpopt_8.c: New test.
* gcc.dg/strcmpopt_9.c: New test.
gcc/ChangeLog:
PR tree-optimization/92683
* gimple-fold.c (gimple_fold_builtin_string_compare): Restore a test
inadvertently removed in a previous change. Rename local variable
for clarity.
Added:
trunk/gcc/testsuite/gcc.dg/strcmpopt_8.c
trunk/gcc/testsuite/gcc.dg/strcmpopt_9.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gimple-fold.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug tree-optimization/92683] [10 Regression] strncmp incorrect result with equal substrings and non-const bound
Date: Wed, 27 Nov 2019 00:03:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Fixed in r278742.
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Subject: [Bug tree-optimization/83819] [meta-bug] missing strlen optimizations
Date: Wed, 27 Nov 2019 00:03:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83819
Bug 83819 depends on bug 92683, which changed state.
Bug 92683 Summary: [10 Regression] strncmp incorrect result with equal substrings and non-const bound
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92683
What |Removed |Added
----------------------------------------------------------------------------
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Subject: [Bug debug/92664] Wrong .debug_line section information when compiling stdin input with -g3
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Nov 27 00:23:39 2019
New Revision: 278752
URL: https://gcc.gnu.org/viewcvs?rev=278752&root=gcc&view=rev
Log:
PR debug/92664
* dwarf2out.c (lookup_filename): Use "<stdin>" instead of "".
Modified:
trunk/gcc/ChangeLog
trunk/gcc/dwarf2out.c
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Subject: [Bug libfortran/92100] Formatted stream IO irreproducible read with binary data in file
Date: Wed, 27 Nov 2019 00:51:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92100
--- Comment #13 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Author: jvdelisle
Date: Wed Nov 27 00:50:51 2019
New Revision: 278753
URL: https://gcc.gnu.org/viewcvs?rev=278753&root=gcc&view=rev
Log:
2019-11-26 Jerry DeLisle <jvdelisle@gcc.ngu.org>
Backport from mainline
PR fortran/92100
io/transfer.c (data_transfer_init): Use fbuf_reset
instead of fbuf_flush before the seek. Note that fbuf_reset
calls fbuf_flush and adjusts fbuf pointers.
gfortran.dg/streamio_18.f90: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/streamio_18.f90
Modified:
branches/gcc-8-branch/gcc/testsuite/ChangeLog
branches/gcc-8-branch/libgfortran/ChangeLog
branches/gcc-8-branch/libgfortran/io/transfer.c
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Subject: [Bug libfortran/92100] Formatted stream IO irreproducible read with binary data in file
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Jerry DeLisle <jvdelisle at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #14 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Fixed on 10, 9, and 8.
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From: "wuxb45 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/92684] New: bitfield behavior not matching the declared type
Date: Wed, 27 Nov 2019 02:29:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92684
Bug ID: 92684
Summary: bitfield behavior not matching the declared type
Product: gcc
Version: 9.2.0
Status: UNCONFIRMED
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found wrong data when compiled by gcc 9.2.0 (x86_64, -std=gnu11). Have not
tried other gcc versions. The results are correct on clang 8.0.1.
Long story short: some bits are missing when using bitfields with uint64_t as
the declared type. Maybe I should use a (u64) cast on every dereference to
those fields. But the results are not always wrong. Maybe I should read some
C11 specs. But consider the different behaviors between gcc and clang, I decide
to report a bug here in hope to get some better help. Thanks.
This reproduces the results: gcc/clang -std=gnu11 main.c
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>
typedef uint64_t u64;
struct st {
union {
struct {
u64 v1:19;
u64 v2:45;
};
void * ptr;
};
};
struct bits {
u64 bit1:1;
u64 bitx:63;
};
int
main(void)
{
char * val = "0xffff0000fff8";
// x has 48 valid bits, the three low bits are 0s
volatile u64 x = strtoull(val, NULL, 16);
printf("%lx\n", x);
// st stores that 45 bits
struct st st = {.v1 = 0, .v2 = (x >> 3)};
printf("%p\n", st.ptr);
// y should get the original bits; but the three high bits are gone.
u64 y = st.v2 << 3;
printf("%lx\n", y);
// this is another (minor) related case.
// some are correct and some are wrong.
struct bits b = {.bit1 = 1, .bitx = 0};
// this is more interesting. gcc shows "80000000", clang shows "1"
printf("%lx %lx %lx\n", b.bit1, b.bit1 << 1, b.bit1 << 63);
return 0;
}
>From gcc-bugs-return-661462-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 02:35:14 2019
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Subject: [Bug c/92684] bitfield behavior not matching the declared type
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Resolution|--- |INVALID
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
-W -Wall:
t.c: In function ‘main’:
t.c:40:3: warning: left shift count >= width of type [enabled by default]
printf("%lx %lx %lx\n", b.bit1, b.bit1 << 1, b.bit1 << 63);
^
t.c:40:3: warning: format ‘%lx’ expects argument of type ‘long unsigned int’,
but argument 2 has type ‘int’ [-Wformat=]
t.c:40:3: warning: format ‘%lx’ expects argument of type ‘long unsigned int’,
but argument 3 has type ‘int’ [-Wformat=]
t.c:40:3: warning: format ‘%lx’ expects argument of type ‘long unsigned int’,
but argument 4 has type ‘int’ [-Wformat=]
>From gcc-bugs-return-661463-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 02:38:32 2019
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Subject: [Bug c/92684] bitfield behavior not matching the declared type
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--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
bit-fields in C is a type.
while in C++, it is not.
So:
st.v2 << 3
This is not ((long)st.v2) << 3 but rather (long:45)<<3. So it gets truncated.
C11:
ffff0000fff8
0xffff0000fff80000
1fff0000fff8
1 2 ffffffff80000000
C++14:
ffff0000fff8
0xffff0000fff80000
ffff0000fff8
1 2 ffffffff80000000
>From gcc-bugs-return-661464-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 02:40:32 2019
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Subject: [Bug c/92684] bitfield behavior not matching the declared type
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--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
There is a defect report dealing with this in C and such.
Both are correct for C11 but would be incorrect for C90 which defines bit-field
types because of the defect report. GCC decided to follow the C90 way because
it is easier to implement one way for both.
>From gcc-bugs-return-661465-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 03:12:55 2019
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Subject: [Bug ipa/92685] New: In IPA's execute stage create_version_clone_with_body fails with non-vNULL callers
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Bug ID: 92685
Summary: In IPA's execute stage create_version_clone_with_body
fails with non-vNULL callers
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: ipa
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CC: marxin at gcc dot gnu.org
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Created attachment 47367
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47367&action=edit
Hello World IPA pass with call to create_version_clone_with_body
Hello,
I am developing a simple ipa pass that versions a single call site to method
`bar`.
I am using `create_version_clone_with_body` instead of `create_version_clone`
because I want to modify `foo`'s body.
In my test case I have three functions
* main
* foo
* bar
In my simple ipa pass, I have implemented the execute stage to call
`create_version_clone_with_body` for method bar.
I am compiling my test with -flto-partition=none, which if I understand
correctly means the execution stage should have access to the method bodies.
You can apply the patch to master (commit id:
17a2c588c29f089d3c2a36df47175bbdf376e399)
I also add my test case.
After compiling with my patch, to trigger the bug just modify the Makefile to
point to the version of gcc with the patch and `make`.
>From gcc-bugs-return-661466-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 03:13:52 2019
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Subject: [Bug ipa/92685] In IPA's execute stage create_version_clone_with_body fails with non-vNULL callers
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--- Comment #1 from Erick Ochoa <erick.ochoa@theobroma-systems.com> ---
Created attachment 47368
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Test Cases
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From: "crazylht at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/92686] New: Inefficient mask operation for 128/256-bit vector VCOND_EXPR under avx512f
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92686
Bug ID: 92686
Summary: Inefficient mask operation for 128/256-bit vector
VCOND_EXPR under avx512f
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: crazylht at gmail dot com
CC: hjl.tools at gmail dot com, wwwhhhyyy333 at gmail dot com
Target Milestone: ---
Target: i386, x86-64
Cat test.c
void mc_weight( unsigned int *__restrict dst, unsigned int *__restrict src1,
int *__restrict src2)
{
for( int x = 0; x < 16; x++ )
dst[x] = src1[x] > src2[x] ? src1[x] : dst[x];
}
With option -Ofast -march=skylake-avx512
gcc using xmm register as mask and using vpblendvb for condition vector move
vmovdqu32 (%rsi), %ymm0
vpminud (%rdx), %ymm0, %ymm1
vpcmpeqd %ymm1, %ymm0, %ymm1
vpblendvb %ymm1, (%rdi), %ymm0, %ymm0
vmovdqu32 %ymm0, (%rdi)
vmovdqu32 32(%rsi), %ymm0
vpminud 32(%rdx), %ymm0, %ymm1
vpcmpeqd %ymm1, %ymm0, %ymm1
vpblendvb %ymm1, 32(%rdi), %ymm0, %ymm0
vmovdqu32 %ymm0, 32(%rdi)
vzeroupper
But there is mask register in avx512f, it could be better as:
vmovdqu (%rsi), %ymm0 #5.25
vmovdqu 32(%rsi), %ymm1 #5.25
vpcmpud $6, (%rdx), %ymm0, %k1 #5.25
vpcmpud $6, 32(%rdx), %ymm1, %k2 #5.25
vmovdqu32 %ymm0, (%rdi){%k1} #5.6
vmovdqu32 %ymm1, 32(%rdi){%k2} #5.6
vzeroupper #6.1
ret #6.1
That's because currently gcc only hanlde 512-bit vector
=-----------------------
3437 /* In AVX512F the result of comparison is an integer mask. */
3438 bool maskcmp = false;
3439 rtx x;
3440
3441 if (GET_MODE_SIZE (cmp_ops_mode) == 64)
3442 {
3443 unsigned int nbits = GET_MODE_NUNITS (cmp_ops_mode);
3444 cmp_mode = int_mode_for_size (nbits, 0).require ();
3445 maskcmp = true;
3446 }
3447 else
------------------------
With additional -mprefer-vector-width=512, gcc have
vmovdqu32 (%rsi), %zmm0
vpminud (%rdx), %zmm0, %zmm1
vpcmpeqd %zmm1, %zmm0, %k1
vmovdqu32 (%rdi), %zmm0{%k1}
vmovdqu32 %zmm0, (%rdi)
vzeroupper
ret
Since mask register is related to isa not vector size, under avx512f we can
also have 128/256-bit vector condition move.
>From gcc-bugs-return-661468-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 03:18:22 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/92685] In IPA's execute stage create_version_clone_with_body fails with non-vNULL callers
Date: Wed, 27 Nov 2019 03:18:00 -0000
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Erick Ochoa <erick.ochoa@theobroma-systems.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #47367|0 |1
is obsolete| |
--- Comment #2 from Erick Ochoa <erick.ochoa@theobroma-systems.com> ---
Created attachment 47369
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47369&action=edit
Hello World IPA pass (corrected)
>From gcc-bugs-return-661469-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 03:19:48 2019
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Subject: [Bug target/92686] Inefficient mask operation for 128/256-bit vector VCOND_EXPR under avx512f
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92686
--- Comment #1 from Hongtao.liu <crazylht at gmail dot com> ---
My local patch shows there's no big performance impact on SPEC2017.
>From gcc-bugs-return-661470-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 03:34:54 2019
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From: "vishal@royal-caliber.com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/92687] New: decltype of a structured binding to a tuple component is a reference type inside a template function
Date: Wed, 27 Nov 2019 03:34:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92687
Bug ID: 92687
Summary: decltype of a structured binding to a tuple component
is a reference type inside a template function
Product: gcc
Version: 9.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: vishal@royal-caliber.com
Target Milestone: ---
Created attachment 47370
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47370&action=edit
preprocessed file
Hello,
The code below shows an inconsistency in the handling of decltype for
structured bindings within template functions vs. non-template functions - the
static_assert in foo() triggers, but not in bar(). I think the handling in
bar() is correct, as per the notes at
https://en.cppreference.com/w/cpp/language/structured_binding.
This may or may not be related to bug 81176. Details of the compilation command
are listed below the source.
Thank you,
Vishal
------------------------------------------------------------
#include <type_traits>
#include <tuple>
template <bool b = false>
void foo()
{
auto [x, y] = std::tuple<int, int>{0, 2};
static_assert(!std::is_reference<decltype(x)>::value);
}
void bar()
{
auto [x, y] = std::tuple<int, int>{0, 2};
static_assert(!std::is_reference<decltype(x)>::value);
}
int main()
{
foo<>();
bar();
}
-----------------------------------------------------------
g++-9.2.0 -v -save-temps -pedantic -Wall -Wextra -std=c++17 test.cpp
Using built-in specs.
COLLECT_GCC=g++-9.2.0
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-pc-linux-gnu/9.2.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /var/tmp/portage/sys-devel/gcc-9.2.0/work/gcc-9.2.0/configure
--host=x86_64-pc-linux-gnu --build=x86_64-pc-linux-gnu --prefix=/usr
--bindir=/usr/x86_64-pc-linux-gnu/gcc-bin/9.2.0
--includedir=/usr/lib/gcc/x86_64-pc-linux-gnu/9.2.0/include
--datadir=/usr/share/gcc-data/x86_64-pc-linux-gnu/9.2.0
--mandir=/usr/share/gcc-data/x86_64-pc-linux-gnu/9.2.0/man
--infodir=/usr/share/gcc-data/x86_64-pc-linux-gnu/9.2.0/info
--with-gxx-include-dir=/usr/lib/gcc/x86_64-pc-linux-gnu/9.2.0/include/g++-v9
--with-python-dir=/share/gcc-data/x86_64-pc-linux-gnu/9.2.0/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 9.2.0 p1' --disable-esp --enable-libstdcxx-time
--enable-shared --enable-threads=posix --enable-__cxa_atexit
--enable-clocale=gnu --disable-multilib --with-multilib-list=m64
--disable-altivec --disable-fixed-point --enable-targets=all --enable-libgomp
--disable-libmudflap --disable-libssp --disable-systemtap
--enable-vtable-verify --enable-lto --without-isl --enable-default-pie
--enable-default-ssp
Thread model: posix
gcc version 9.2.0 (Gentoo 9.2.0 p1)
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-Wpedantic' '-Wall' '-Wextra'
'-std=c++17' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
/usr/libexec/gcc/x86_64-pc-linux-gnu/9.2.0/cc1plus -E -quiet -v -D_GNU_SOURCE
test.cpp -mtune=generic -march=x86-64 -std=c++17 -Wpedantic -Wall -Wextra
-fpch-preprocess -o test.ii
ignoring nonexistent directory "/usr/local/include"
ignoring nonexistent directory
"/usr/lib/gcc/x86_64-pc-linux-gnu/9.2.0/../../../../x86_64-pc-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
/usr/lib/gcc/x86_64-pc-linux-gnu/9.2.0/include/g++-v9
/usr/lib/gcc/x86_64-pc-linux-gnu/9.2.0/include/g++-v9/x86_64-pc-linux-gnu
/usr/lib/gcc/x86_64-pc-linux-gnu/9.2.0/include/g++-v9/backward
/usr/lib/gcc/x86_64-pc-linux-gnu/9.2.0/include
/usr/lib/gcc/x86_64-pc-linux-gnu/9.2.0/include-fixed
/usr/include
End of search list.
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-Wpedantic' '-Wall' '-Wextra'
'-std=c++17' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
/usr/libexec/gcc/x86_64-pc-linux-gnu/9.2.0/cc1plus -fpreprocessed test.ii
-quiet -dumpbase test.cpp -mtune=generic -march=x86-64 -auxbase test -Wpedantic
-Wall -Wextra -std=c++17 -version -o test.s
GNU C++17 (Gentoo 9.2.0 p1) version 9.2.0 (x86_64-pc-linux-gnu)
compiled by GNU C version 9.2.0, GMP version 6.1.2, MPFR version 3.1.6,
MPC version 1.0.3, isl version none
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU C++17 (Gentoo 9.2.0 p1) version 9.2.0 (x86_64-pc-linux-gnu)
compiled by GNU C version 9.2.0, GMP version 6.1.2, MPFR version 3.1.6,
MPC version 1.0.3, isl version none
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 2f11227cf3606c8ecdab2bd17fc2bf18
test.cpp: In function ‘void foo()’:
test.cpp:9:17: error: static assertion failed
9 | static_assert(!std::is_reference<decltype(x)>::value);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>From gcc-bugs-return-661471-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 05:25:00 2019
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Subject: [Bug tree-optimization/91790] ICE: verify_ssa failed (error: definition in block 2 follows the use)
Date: Wed, 27 Nov 2019 05:24:00 -0000
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Kewen Lin <linkw at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #47357|0 |1
is obsolete| |
--- Comment #11 from Kewen Lin <linkw at gcc dot gnu.org> ---
Created attachment 47371
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47371&action=edit
47357: Defer vect_setup_realignment for different first_stmt_info
Bootstrapped and tested on powerpc64le-linux-gnu (P8LE) and ppc64-redhat-linux
(P7BE).
>From gcc-bugs-return-661472-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 07:33:47 2019
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Subject: [Bug c++/92675] sign-conversion C++ unsigned int j = -1;
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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> ---
-1u also works
>From gcc-bugs-return-661474-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 07:37:52 2019
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Subject: [Bug bootstrap/92680] PGO bootstrap is broken with --with-build-config=bootstrap-lto-lean and in-itree mpfr
Date: Wed, 27 Nov 2019 07:37:00 -0000
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
And gmp has a similar issue.
>From gcc-bugs-return-661473-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 07:37:07 2019
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Subject: [Bug bootstrap/92680] PGO bootstrap is broken with --with-build-config=bootstrap-lto-lean and in-itree mpfr
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
I think that's known and was fixed upstream, but the easiest option is to pass
-fno-lto to stage2+ mpfr configure via the host_module config (need to figure
what environment to set exactly and/or invent extra vars honored by bootstrap)
We carry locally in our package
diff --git a/configure b/configure
index 6581c68..a82593c 100755
--- a/configure
+++ b/configure
@@ -16158,7 +16158,7 @@ foo_t foo = {
};
EOF
- mpfr_compile="$CC $CFLAGS $CPPFLAGS -c conftest.c >&5 2>&1"
+ mpfr_compile="$CC $CFLAGS $CPPFLAGS -c conftest.c -fno-lto >&5 2>&1"
if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$mpfr_compile\""; }
>&5
(eval $mpfr_compile) 2>&5
ac_status=$?
>From gcc-bugs-return-661475-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 07:39:10 2019
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Subject: [Bug other/92681] PGO bootstrap with --with-build-config=bootstrap-lto-lean is not training non-C++ frontends
Date: Wed, 27 Nov 2019 07:39:00 -0000
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Is it actually making it worse from non-PGO or do we at least treat missing
profile data as "it wasn't trained"?
>From gcc-bugs-return-661476-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 07:39:36 2019
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Subject: [Bug target/92682] [10 Regression] maxlocval_4.f90 / minlocval_4.f90 failure on POWER9
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Target Milestone|--- |10.0
>From gcc-bugs-return-661477-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 07:46:25 2019
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Subject: [Bug target/92686] Inefficient mask operation for 128/256-bit vector VCOND_EXPR under avx512f
Date: Wed, 27 Nov 2019 07:46:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
It would be definitely nice to have this. Maybe add a tunable whether to use
mask registers for SSE/AVX2? Is there any boost frequency penalty for using
them? Using mask registers also looks like a way to reduce register pressure
(in case the register pressure is not on the masks side).
>From gcc-bugs-return-661478-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 07:50:19 2019
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Subject: [Bug fortran/92123] [F2018/array-descriptor] Scalar allocatable/pointer with array descriptor (via bind(C)): ICE with select rank or error scalar variable with POINTER or ALLOCATABLE in procedure with BIND(C) is not yet supported
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--- Comment #19 from Richard Biener <rguenth at gcc dot gnu.org> ---
There is also tree-core.h:
/* Call argument flags. */
/* Nonzero if the argument is not dereferenced recursively, thus only
directly reachable memory is read or written. */
#define EAF_DIRECT (1 << 0)
/* Nonzero if memory reached by the argument is not clobbered. */
#define EAF_NOCLOBBER (1 << 1)
/* Nonzero if the argument does not escape. */
#define EAF_NOESCAPE (1 << 2)
/* Nonzero if the argument is not used by the function. */
#define EAF_UNUSED (1 << 3)
/* Call return flags. */
/* Mask for the argument number that is returned. Lower two bits of
the return flags, encodes argument slots zero to three. */
#define ERF_RETURN_ARG_MASK (3)
/* Nonzero if the return value is equal to the argument number
flags & ERF_RETURN_ARG_MASK. */
#define ERF_RETURNS_ARG (1 << 2)
but eventually specifying some terminology and then consistently using that
might help... Eventually the documentation bits could go to the internals
manual somewhere ('no vops' is also not documented).
>From gcc-bugs-return-661479-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 08:06:45 2019
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Subject: [Bug target/92686] Inefficient mask operation for 128/256-bit vector VCOND_EXPR under avx512f
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--- Comment #3 from Hongtao.liu <crazylht at gmail dot com> ---
Created attachment 47372
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47372&action=edit
Local patch with Bootstrap and regression test on i386/x86_64 is ok.
Also I found there are some disturb with pr88547.
>From gcc-bugs-return-661480-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 08:16:03 2019
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Subject: [Bug target/92686] Inefficient mask operation for 128/256-bit vector VCOND_EXPR under avx512f
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--- Comment #4 from Hongtao.liu <crazylht at gmail dot com> ---
(In reply to Richard Biener from comment #2)
> It would be definitely nice to have this. Maybe add a tunable whether to use
> mask registers for SSE/AVX2?
Sure for 128/256-bit vector under avx512f.
> Is there any boost frequency penalty for using them?
not see any frequency penalty by using mask register.
> Using mask registers also looks like a way to reduce register pressure
> (in case the register pressure is not on the masks side).
Yes, it would save 1 vector register(using for mask) and 1
instruction(vpblendvb)
>From gcc-bugs-return-661481-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 08:32:34 2019
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Subject: [Bug rtl-optimization/92283] [10 Regression] 454.calculix miscomparison since r276645 with -O2 -march=znver2
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--- Comment #23 from Richard Biener <rguenth at gcc dot gnu.org> ---
Vladimir, can you look into this LRA inheritance issue?
>From gcc-bugs-return-661482-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 08:34:25 2019
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Subject: [Bug target/91602] GCC fails to build for riscv in a combined tree due to misconfigured leb128 support
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords|easyhack |
--- Comment #8 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
https://sourceware.org/ml/binutils/2019-11/msg00393.html
Removing easyhack as this support actually is being added to binutils ...
>From gcc-bugs-return-661483-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 08:41:40 2019
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From: "erick.ochoa@theobroma-systems.com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/92685] In IPA's execute stage create_version_clone_with_body fails with non-vNULL callers
Date: Wed, 27 Nov 2019 08:41:00 -0000
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--- Comment #3 from Erick Ochoa <erick.ochoa@theobroma-systems.com> ---
Created attachment 47373
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47373&action=edit
Possible solution
I attach a possible solution. Although I am not familiar if this will break the
design for IPA passes. Someone, more familiar with the area, please let me
know.
>From gcc-bugs-return-661484-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 08:41:55 2019
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From: "boostcpp at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/92688] New: including <regex> introduce the name index to global namespace scope
Date: Wed, 27 Nov 2019 08:41:00 -0000
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Bug ID: 92688
Summary: including <regex> introduce the name index to global
namespace scope
Product: gcc
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This code introduce regression after GCC 4.9 and onward.
#include <regex>
template < typename T >
struct index { }
int main() { }
Also, this code fails to compile even at GCC 4.4.7(I don't have an easy test
environment of GCC older than this version)
#include <cstring>
int index ;
int main(){}
The reason is <regex> include <cstring>, which include <string.h> which has a
function name index on global namespace scope. The index function was
originally came from <strings.h>. For some reason, its name is declared on
default in <string.h>
<strings.h> and its index function is not part of the C++ standard nor C
standard. it has been deprecated long ago. GCC without GNU extention(like with
option -std=c++XX) shall not pollute the global namespace scope with the
non-standard conforming library name that is so generic like "index" if it only
include the standard library header files.
>From gcc-bugs-return-661488-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 08:48:51 2019
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Subject: [Bug tree-optimization/53947] [meta-bug] vectorizer missed-optimizations
Date: Wed, 27 Nov 2019 08:48:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53947
Bug 53947 depends on bug 88915, which changed state.
Bug 88915 Summary: Try smaller vectorisation factors in scalar fallback
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88915
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----------------------------------------------------------------------------
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Resolution|--- |FIXED
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Subject: [Bug libstdc++/6257] [DR 456] C-library symbols enter global namespace
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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CC| |boostcpp at gmail dot com
--- Comment #31 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
*** Bug 92688 has been marked as a duplicate of this bug. ***
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Subject: [Bug tree-optimization/88915] Try smaller vectorisation factors in scalar fallback
Date: Wed, 27 Nov 2019 08:48:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed on trunk.
>From gcc-bugs-return-661485-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 08:48:16 2019
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Subject: [Bug libstdc++/92688] including <regex> introduce the name index to global namespace scope
Date: Wed, 27 Nov 2019 08:48:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Dup of bug 6257.
Please read DR 456 from C++ standard too.
*** This bug has been marked as a duplicate of bug 6257 ***
>From gcc-bugs-return-661489-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 08:52:53 2019
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Subject: [Bug lto/92674] [8/9/10 Regression] ICE in gimple_phi_arg, at gimple.h:4406 since r240291
Date: Wed, 27 Nov 2019 08:52:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92674
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Nov 27 08:52:17 2019
New Revision: 278757
URL: https://gcc.gnu.org/viewcvs?rev=278757&root=gcc&view=rev
Log:
2019-11-27 Richard Biener <rguenther@suse.de>
PR middle-end/92674
* tree-inline.c (expand_call_inline): Delay purging EH/abnormal
edges and instead record blocks in bitmap.
(gimple_expand_calls_inline): Adjust.
(fold_marked_statements): Delay EH cleanup until all folding is
done.
(optimize_inline_calls): Do EH/abnormal cleanup for calls after
inlining finished.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree-inline.c
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Subject: [Bug libstdc++/92688] including <regex> introduce the name index to global namespace scope
Date: Wed, 27 Nov 2019 08:53:00 -0000
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--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
index was the POSIX name for strchr (because issue 6 marked as legacy):
https://pubs.opengroup.org/onlinepubs/009695399/functions/index.html
GCC does not have full control over glibc and even then read the older PR about
issues. Plus GCC does not have a POSIX option.
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Subject: [Bug tree-optimization/92645] Hand written vector code is 450 times slower when compiled with GCC compared to Clang
Date: Wed, 27 Nov 2019 08:56:00 -0000
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--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Nov 27 08:56:23 2019
New Revision: 278758
URL: https://gcc.gnu.org/viewcvs?rev=278758&root=gcc&view=rev
Log:
2019-11-27 Richard Biener <rguenther@suse.de>
PR tree-optimization/92645
* tree-ssa-forwprop.c (simplify_vector_constructor): Handle
CTORs with just a subset of the original vectors.
* gcc.target/i386/pr92645-2.c: New testcase.
* gcc.target/i386/pr92645-3.c: Likewise.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr92645-2.c
trunk/gcc/testsuite/gcc.target/i386/pr92645-3.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-forwprop.c
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Subject: [Bug tree-optimization/92689] New: Improve stmt_may_clobber_ref_p_1 on constant memory reference
Date: Wed, 27 Nov 2019 08:57:00 -0000
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Bug ID: 92689
Summary: Improve stmt_may_clobber_ref_p_1 on constant memory
reference
Product: gcc
Version: unknown
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Priority: P3
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If ao_ref represents a constant data, stmt_may_clobber_ref_p_1() and
call_may_clobber_ref_p() can return false. But not sure there is any subtlety
behind it, which I missed.
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Subject: [Bug tree-optimization/92689] Improve stmt_may_clobber_ref_p_1 on constant memory reference
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Do you have a testcase?
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From: "tangyixuan at mail dot dlut.edu.cn" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/90632] Incorrect error diagnosis of variable declaration
Date: Wed, 27 Nov 2019 09:00:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90632
--- Comment #1 from tangyixuan <tangyixuan at mail dot dlut.edu.cn> ---
Hi:
I think the superfluous error information of ‘a’ in the above code is fixed in
gcc-trunk.
$ gcc-trunk -c s.c
s.c:1:13: error: expected ‘;’ before ‘static’
1 | static int c
| ^
| ;
2 | static int a = 0;
| ~~~~~~
s.c: In function ‘main’:
s.c:10:5: error: ‘c’ undeclared (first use in this function)
10 | c = func_1(a);
| ^
s.c:10:5: note: each undeclared identifier is reported only once for each
function it appears in
$ gcc-trunk -version
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-10-20191124/configure --prefix=/usr/local/gcc-20191124
--enable-checking=release --enable-languages=c,c++ --disable-multilib
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 10.0.0 20191124 (experimental) (GCC)
Best regard
>From gcc-bugs-return-661496-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 09:02:58 2019
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Subject: [Bug lto/91576] [10 Regression] error: invalid conversion in gimple call since r272749
Date: Wed, 27 Nov 2019 09:02:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P1
--- Comment #15 from Martin Liška <marxin at gcc dot gnu.org> ---
@Honza: Can you please take a look?
>From gcc-bugs-return-661495-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 09:02:40 2019
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Subject: [Bug lto/91576] [10 Regression] error: invalid conversion in gimple call since r272749
Date: Wed, 27 Nov 2019 09:02:00 -0000
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--- Comment #14 from Martin Liška <marxin at gcc dot gnu.org> ---
Created attachment 47374
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47374&action=edit
Another test-case
I see very similar error since the problematic revision:
$ g++ -O3 -fPIC file*.ii -flto
...
file4.ii:55:724: internal compiler error: Segmentation fault
55 | unsigned int AgreedValueLength() const ; unsigned int
StaticPrivateKeyLength() const ; unsigned int StaticPublicKeyLength() const ;
unsigned int EphemeralPrivateKeyLength() const ; unsigned int
EphemeralPublicKeyLength() const ; bool Agree(byte *agreedValue, const
byte *staticPrivateKey, const byte *ephemeralPrivateKey, const byte
*staticOtherPublicKey, const byte *ephemeralOtherPublicKey, bool
validateStaticOtherPublicKey=true) const { try { const
DL_GroupParameters<Element> ¶ms = GetAbstractGroupParameters(); Element
WW = params.DecodeElement(staticOtherPublicKey, validateStaticOtherPublicKey);
Element VV = params.DecodeElement(ephemeralOtherPublicKey, true); Integer
s(staticPrivateKey, StaticPrivateKeyLength()); Integer
u(ephemeralPrivateKey, StaticPrivateKeyLength()); Element V =
params.DecodeElement(ephemeralPrivateKey+StaticPrivateKeyLength(), false);
const Integer &r = params.GetSubgroupOrder(); Integer h2 =
Integer::Power2((r.BitCount()+1)/2); Integer e =
((h2+params.ConvertElementToInteger(V)%h2)*s+u) % r; Integer tt = h2 +
params.ConvertElementToInteger(VV) % h2; if (COFACTOR_OPTION::ToEnum() ==
NO_COFACTOR_MULTIPLICTION) { Element P = params.ExponentiateElement(WW,
tt); P = m_groupParameters.MultiplyElements(P, VV); Element R[2];
const Integer e2[2] = {r, e}; params.SimultaneousExponentiate(R, P, e2, 2);
if (!params.IsIdentity(R[0]) || params.IsIdentity(R[1])) return false;
params.EncodeElement(false, R[1], agreedValue); } else { const
Integer &k = params.GetCofactor(); if (COFACTOR_OPTION::ToEnum() ==
COMPATIBLE_COFACTOR_MULTIPLICTION) e = ModularArithmetic(r).Divide(e, k);
Element P = m_groupParameters.CascadeExponentiate(VV, k*e, WW, k*(e*tt%r));
if (params.IsIdentity(P)) return false; params.EncodeElement(false,
P, agreedValue); } } catch (DL_BadElement &) { return false; }
return true; } private: const DL_GroupParameters<Element> &
GetAbstractGroupParameters() const ; GroupParameters m_groupParameters; };
typedef MQV_Domain<DL_GroupParameters_GFP_DefaultSafePrime> MQV; }
|
^
0xa15d2f crash_signal
../../gcc/toplev.c:328
0x7f4235b4714f ???
/usr/src/debug/glibc-2.30-1.2.x86_64/signal/../sysdeps/unix/sysv/linux/x86_64/sigaction.c:0
0xc61640 decl_assembler_name(tree_node*)
../../gcc/tree.c:707
0x825aa5 types_same_for_odr(tree_node const*, tree_node const*)
../../gcc/ipa-devirt.c:360
0x84892e ipa_polymorphic_call_context::get_dynamic_type(tree_node*, tree_node*,
tree_node*, gimple*, unsigned int*)
../../gcc/ipa-polymorphic-call.c:1803
0xb89cf2 eliminate_dom_walker::eliminate_stmt(basic_block_def*,
gimple_stmt_iterator*)
../../gcc/tree-ssa-sccvn.c:5758
0xb8b15d eliminate_dom_walker::before_dom_children(basic_block_def*)
../../gcc/tree-ssa-sccvn.c:5917
0xb8b15d eliminate_dom_walker::before_dom_children(basic_block_def*)
../../gcc/tree-ssa-sccvn.c:5850
0x1186db5 dom_walker::walk(basic_block_def*)
../../gcc/domwalk.c:309
0xb8494b eliminate_with_rpo_vn(bitmap_head*)
../../gcc/tree-ssa-sccvn.c:6095
0xb92502 do_rpo_vn
../../gcc/tree-ssa-sccvn.c:7240
0xb93180 execute
../../gcc/tree-ssa-sccvn.c:7322
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
lto-wrapper: fatal error: g++ returned 1 exit status
compilation terminated.
/usr/bin/ld: error: lto-wrapper failed
collect2: error: ld returned 1 exit status
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Subject: [Bug target/92646] Compilation fails on armv7l with sys/cdefs.h: No such file or directory
Date: Wed, 27 Nov 2019 09:04:00 -0000
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--- Comment #6 from Mysaa <samyavrillon at netcourrier dot com> ---
So I ran the compilation adding only --enable-multiarch and it failed with
nother error :
cp ../../gcc/../fixincludes/README-fixinc include-fixed/README
chmod a+r include-fixed/README
echo timestamp > stmp-int-hdrs
/home/bernard/building/gcc-9.2.0/build/./gcc/xgcc
-B/home/bernard/building/gcc-9.2.0/build/./gcc/ -xc -nostdinc /dev/null -S -o
/dev/null -fself-test=../../gcc/testsuite/selftests
-fself-test: 47403 pass(es) in 5.027115 seconds
echo timestamp > s-selftest-c
/home/bernard/building/gcc-9.2.0/build/./gcc/xgcc
-B/home/bernard/building/gcc-9.2.0/build/./gcc/ -xc++ -nostdinc /dev/null -S -o
/dev/null -fself-test=../../gcc/testsuite/selftests
xgcc: fatal error: cannot execute 'cc1plus': execvp: No such file or directory
compilation terminated.
../../gcc/cp/Make-lang.in:178: recipe for target 's-selftest-c++' failed
Nonetheless, I found the compilation options gcc6 was originally compiled with
and ran the sams ctring (disableing some options) and the make process and the
make install processes completed. But the make check failed. I send you the
./configure line and the error of make check :
../configure -v --with-pkgversion='Pipi 001'
--with-bugurl=file:///usr/share/doc/gcc-6/README.Bugs
--enable-languages=c,ada,c++,go,d,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-9-pipi --program-prefix=arm-linux-gnueabihf- --enable-shared
--enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext
--enable-threads=posix --libdir=/usr/lib --enable-nls --with-sysroot=/
--enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-libitm
--disable-libquadmath --enable-plugin --enable-default-pie --with-system-zlib
--disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo
--with-java-home=/usr/lib/jvm/java-1.11.0-openjdk-armhf/jre --enable-java-home
--with-jvm-root-dir=/usr/lib/jvm/java-1.11.0-openjdk-armhf/
--with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.11.0-openjdk-armhf/
--with-arch-directory=arm --with-ecj-jar=/usr/share/java/eclipse-ecj.jar
--with-target-system-zlib --enable-objc-gc=auto --enable-multiarch
--disable-sjlj-exceptions --with-arch=armv7-a --with-fpu=vfpv3-d16
--with-float=hard --with-mode=thumb --enable-checking=release
--build=arm-linux-gnueabihf --host=arm-linux-gnueabihf
--target=arm-linux-gnueabihf
<blockquote>
/bin/mkdir -p check-vet-dir/src/cmd/internal
check-vet-dir/src/cmd/vendor/golang.org/x
cp -r ../../gotools/../libgo/go/cmd/vet check-vet-dir/src/cmd/
cp -r ../../gotools/../libgo/go/cmd/internal/objabi
check-vet-dir/src/cmd/internal
cp ../arm-linux-gnueabihf/libgo/objabi.go
check-vet-dir/src/cmd/internal/objabi/
cp -r ../../gotools/../libgo/go/golang.org/x/tools
check-vet-dir/src/cmd/vendor/golang.org/x/
PATH=`echo /home/bernard/building/gcc-9.2.0-pipi/build/gotools:${PATH} | sed
's,::*,:,g;s,^:*,,;s,:*$,,'`; export PATH;
GCCGO="/home/bernard/building/gcc-9.2.0-pipi/build/gotools/check-gccgo"; export
GCCGO; CC="/home/bernard/building/gcc-9.2.0-pipi/build/gotools/check-gcc";
export CC; GCCGOTOOLDIR="/home/bernard/building/gcc-9.2.0-pipi/build/gotools";
export GCCGOTOOLDIR; GO_TESTING_GOTOOLS=yes; export GO_TESTING_GOTOOLS;
abs_libgodir=`cd ../arm-linux-gnueabihf/libgo && ${PWDCMD-pwd}`;
LD_LIBRARY_PATH=`echo ${abs_libgodir}/.libs:${LD_LIBRARY_PATH} | sed
's,::*,:,g;s,^:*,,;s,:*$,,'`; export LD_LIBRARY_PATH; GOROOT=${abs_libgodir};
export GOROOT;
GOCACHE=/home/bernard/building/gcc-9.2.0-pipi/build/gotools/gocache-test;
export GOCACHE; fl1="FA"; fl2="IL"; fl="${fl1}${fl2}"; \
GOPATH=`cd check-vet-dir && ${PWDCMD-pwd}`; \
export GOPATH; \
(cd check-vet-dir/src/cmd/vet &&
/home/bernard/building/gcc-9.2.0-pipi/build/gotools/go test -test.short
-test.timeout=1200s -test.v) >> cmd_vet-testlog 2>&1 || echo "--- ${fl}: go
test cmd/vet (0.00s)" >> cmd_vet-testlog
grep '^--- ' cmd_vet-testlog | sed -e 's/^--- \(.*\) ([^)]*)$/\1/' | sort -k 2
PASS: TestTags
PASS: TestVet
Makefile:968: recipe for target 'check' failed
</blockquote>
It's strange as i see no specific test failing
>From gcc-bugs-return-661498-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 09:05:15 2019
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Subject: [Bug c++/92524] [9/10 Regression] ICE in short program with constexpr and std::array
Date: Wed, 27 Nov 2019 09:05:00 -0000
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Nov 27 09:04:40 2019
New Revision: 278759
URL: https://gcc.gnu.org/viewcvs?rev=278759&root=gcc&view=rev
Log:
PR c++/92524
* tree.c (replace_placeholders_r): Don't walk constructor elts with
RANGE_EXPR indexes.
* g++.dg/cpp0x/pr92524.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/pr92524.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/tree.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug libstdc++/92688] including <regex> introduce the name index to global namespace scope
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92688
SODA Noriyuki <soda-gnu at yuruyuru dot net> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |soda-gnu at yuruyuru dot net
--- Comment #3 from SODA Noriyuki <soda-gnu at yuruyuru dot net> ---
> GCC does not have full control over glibc
yes.
but glibc have been providing an option to disable the index symbol,
and -std=c99, -std=c11 are already using the option.
why -std=c++11 won't use the option?
>From gcc-bugs-return-661500-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 09:08:55 2019
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Subject: [Bug tree-optimization/91790] ICE: verify_ssa failed (error: definition in block 2 follows the use)
Date: Wed, 27 Nov 2019 09:08:00 -0000
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--- Comment #12 from Kewen Lin <linkw at gcc dot gnu.org> ---
Author: linkw
Date: Wed Nov 27 09:08:20 2019
New Revision: 278760
URL: https://gcc.gnu.org/viewcvs?rev=278760&root=gcc&view=rev
Log:
[PATCH] Fix PR91790 by considering different first_stmt_info for realign
As PR91790 exposed, when we have one slp node whose first_stmt_info_for_drptr
is different from first_stmt_info, it's possible that the first_stmt DR isn't
initialized yet before stmt SLP_TREE_SCALAR_STMTS[0] of slp node. So we
shouldn't use first_stmt_info for vect_setup_realignment, instead we can use
the one based on first_stmt_info_for_drptr DR with additional adjustment by
bumping the distance from first_stmt DR.
gcc/ChangeLog
2019-11-27 Kewen Lin <linkw@gcc.gnu.org>
PR tree-optimization/91790
* gcc/tree-vect-stmts.c (vectorizable_load): Use the adjusted DR for
vect_setup_realignment when first_stmt_info is different from
first_stmt_info_for_drptr.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree-vect-stmts.c
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Subject: [Bug libstdc++/92688] including <regex> introduce the name index to global namespace scope
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--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
See PR 11196 and PR 2082 for that issue ...
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Subject: [Bug target/92646] Compilation fails on armv7l with sys/cdefs.h: No such file or directory
Date: Wed, 27 Nov 2019 09:10:00 -0000
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--- Comment #7 from Mysaa <samyavrillon at netcourrier dot com> ---
My bad ...
Here is the test that fails :
FAIL: go test misc/cgo/testcarchive
rm -rf check-vet-dir cmd_vet-testlog
/bin/mkdir -p check-vet-dir/src/cmd/internal
check-vet-dir/src/cmd/vendor/golang.org/x
cp -r ../../gotools/../libgo/go/cmd/vet check-vet-dir/src/cmd/
cp -r ../../gotools/../libgo/go/cmd/internal/objabi
check-vet-dir/src/cmd/internal
cp ../arm-linux-gnueabihf/libgo/objabi.go
check-vet-dir/src/cmd/internal/objabi/
cp -r ../../gotools/../libgo/go/golang.org/x/tools
check-vet-dir/src/cmd/vendor/golang.org/x/
PATH=`echo /home/bernard/building/gcc-9.2.0-pipi/build/gotools:${PATH} | sed
's,::*,:,g;s,^:*,,;s,:*$,,'`; export PATH;
GCCGO="/home/bernard/building/gcc-9.2.0-pipi/build/gotools/check-gccgo"; export
GCCGO; CC="/home/bernard/building/gcc-9.2.0-pipi/build/gotools/check-gcc";
export CC; GCCGOTOOLDIR="/home/bernard/building/gcc-9.2.0-pipi/build/gotools";
export GCCGOTOOLDIR; GO_TESTING_GOTOOLS=yes; export GO_TESTING_GOTOOLS;
abs_libgodir=`cd ../arm-linux-gnueabihf/libgo && ${PWDCMD-pwd}`;
LD_LIBRARY_PATH=`echo ${abs_libgodir}/.libs:${LD_LIBRARY_PATH} | sed
's,::*,:,g;s,^:*,,;s,:*$,,'`; export LD_LIBRARY_PATH; GOROOT=${abs_libgodir};
export GOROOT;
GOCACHE=/home/bernard/building/gcc-9.2.0-pipi/build/gotools/gocache-test;
export GOCACHE; fl1="FA"; fl2="IL"; fl="${fl1}${fl2}"; \
GOPATH=`cd check-vet-dir && ${PWDCMD-pwd}`; \
export GOPATH; \
(cd check-vet-dir/src/cmd/vet &&
/home/bernard/building/gcc-9.2.0-pipi/build/gotools/go test -test.short
-test.timeout=1200s -test.v) >> cmd_vet-testlog 2>&1 || echo "--- ${fl}: go
test cmd/vet (0.00s)" >> cmd_vet-testlog
grep '^--- ' cmd_vet-testlog | sed -e 's/^--- \(.*\) ([^)]*)$/\1/' | sort -k 2
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--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #4)
> See PR 11196 and PR 2082 for that issue ...
More to the point is glibc still does not do the right thing for what is needed
to support C++11 and above:
https://sourceware.org/bugzilla/show_bug.cgi?id=21327
This is all mentioned in PR 11196.
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Subject: [Bug middle-end/92463] Cleanups due to minimum MPFR version bump to 3.1.0
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--- Comment #6 from Tobias Burnus <burnus at gcc dot gnu.org> ---
Author: burnus
Date: Wed Nov 27 09:16:24 2019
New Revision: 278761
URL: https://gcc.gnu.org/viewcvs?rev=278761&root=gcc&view=rev
Log:
PR 92463 - Cleanups due to minimum MPFR version bump to 3.1.0
PR middle-end/92463
* configure.ac: Use MPFR_RNDN instead of GMP's MP_RNDN.
* configure: Regenerate
gcc/
PR middle-end/92463
* builtins.c (do_mpfr_ckconv, do_mpc_ckconv, do_mpfr_remquo,
do_mpfr_lgamma_r, do_mpc_arg2): Use MPFR_RNDx instead of GMP_RNDx,
mpfr_rnd_t instead of mp_rnd_t.
* fold-const-call.c (do_mpfr_ckconv, do_mpfr_arg1, do_mpfr_sincos,
do_mpfr_arg2, do_mpfr_arg3, do_mpc_arg1, do_mpc_arg2): Likewise.
* gimple-ssa-sprintf.c (format_floating_max, format_floating):
Use mpfr_exp_t instead of mp_exp_t.
* real.c (real_from_string, dconst_e_ptr, dconst_sqrt2_ptr): Use
MPFR_RNDx instead of GMP_RNDx.
* realmpfr.c (real_from_mpfr, mpfr_from_real): Use mpfr_rnd_t and
mpfr_exp_t instead mp_rnd_t and mp_exp_t, respectively.
* realmpfr.h (real_from_mpfr, mpfr_from_real): Use mpfr_rnd_t instead
of mp_rnd_t and remove MPFR_RNDx poisoning.
* ubsan.c (ubsan_instrument_float_cast): MPFR_RNDx instead of GMP_RNDx.
fortran/
PR middle-end/92463
* arith.c (gfc_check_real_range): Replace mp_exp_t by mpfr_exp_t.
Modified:
trunk/ChangeLog
trunk/configure
trunk/configure.ac
trunk/gcc/ChangeLog
trunk/gcc/builtins.c
trunk/gcc/fold-const-call.c
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/arith.c
trunk/gcc/gimple-ssa-sprintf.c
trunk/gcc/real.c
trunk/gcc/realmpfr.c
trunk/gcc/realmpfr.h
trunk/gcc/ubsan.c
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Subject: [Bug go/92463] Cleanups due to minimum MPFR version bump to 3.1.0
Date: Wed, 27 Nov 2019 09:19:00 -0000
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Tobias Burnus <burnus at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |cmang at google dot com
Component|middle-end |go
Assignee|unassigned at gcc dot gnu.org |ian at airs dot com
--- Comment #7 from Tobias Burnus <burnus at gcc dot gnu.org> ---
The middle end is fixed – The Go front end remains – but won't be tackled by
me.
Re-assign to the 'Go' component.
>From gcc-bugs-return-661506-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 09:23:45 2019
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Subject: [Bug c++/92524] [9 Regression] ICE in short program with constexpr and std::array
Date: Wed, 27 Nov 2019 09:23:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[9/10 Regression] ICE in |[9 Regression] ICE in short
|short program with |program with constexpr and
|constexpr and std::array |std::array
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed on the trunk so far.
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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/92690] New: [10 Regression] vector CTOR optimization performs invalid conversion
Date: Wed, 27 Nov 2019 09:30:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92690
Bug ID: 92690
Summary: [10 Regression] vector CTOR optimization performs
invalid conversion
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: rguenth at gcc dot gnu.org
Target Milestone: ---
/* { dg-do run { target *-*-*gnu* } */
/* { dg-additional-options "-D_GNU_SOURCE" } */
/* { dg-require-effective-target fenv_exceptions } */
#include <fenv.h>
typedef int v4si __attribute__((vector_size(16)));
typedef float v4sf __attribute__((vector_size(16)));
void __attribute__((noipa))
foo (v4si *dstp, v4sf *srcp)
{
v4sf src = *srcp;
*dstp = (v4si) { src[0], src[1], 3, 4 };
}
void __attribute__((noipa))
bar (v4sf *dstp, v4si *srcp)
{
v4si src = *srcp;
*dstp = (v4sf) { src[0], src[1], 3.5, 4.5 };
}
int
main()
{
feenableexcept (FE_INVALID|FE_INEXACT);
v4sf x = (v4sf) { 1, 2, __builtin_nanf (""), 3.5 };
v4si y;
foo (&y, &x);
if (y[0] != 1 || y[1] != 2 || y[2] != 3 || y[3] != 4)
__builtin_abort ();
y = (v4si) { 0, 1, __INT_MAX__, -__INT_MAX__ };
bar (&x, &y);
if (x[0] != 0 || x[1] != 1 || x[2] != 3.5 || x[3] != 4.5)
__builtin_abort ();
return 0;
}
>From gcc-bugs-return-661508-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 09:30:56 2019
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Subject: [Bug tree-optimization/92690] [10 Regression] vector CTOR optimization performs invalid conversion
Date: Wed, 27 Nov 2019 09:30:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2019-11-27
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Target Milestone|--- |10.0
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mine.
>From gcc-bugs-return-661509-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 09:31:47 2019
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From: "soda-gnu at yuruyuru dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/92688] including <regex> introduce the name index to global namespace scope
Date: Wed, 27 Nov 2019 09:31:00 -0000
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--- Comment #6 from SODA Noriyuki <soda-gnu at yuruyuru dot net> ---
> More to the point is glibc still does not do the right thing for what is needed to support C++11 and above:
hmm, thanks.
the pthread symbols in PR 21327 become visible with -D_XOPEN_SOURCE=700 without
-D_GNU_SOURCE.
the M_PI symbol in PR 11196 becomes visbile with -D_XOPEN_SOURCE=700 too.
is there any other symbols which are necessary for -std=c++11, but invisible
with -D_XOPEN_SOURCE=700 ?
>From gcc-bugs-return-661510-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 09:45:59 2019
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From: "marcello.m at yahoo dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/92679] Test case with failing unordered_map search when key is type_index
Date: Wed, 27 Nov 2019 09:45:00 -0000
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--- Comment #6 from Marcello Mansueto <marcello.m at yahoo dot com> ---
Hello,
thanks a lot for the support.
Now that I see it, it's really obvious, my bad.
I've really appreciate your proposition to improve further the code, awesome :)
Bye and kind regards.
>From gcc-bugs-return-661511-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 10:01:30 2019
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Subject: [Bug fortran/91944] [8/9/10 Regression] ICE in gfc_conv_array_initializer, at fortran/trans-array.c:6156
Date: Wed, 27 Nov 2019 10:01:00 -0000
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Nov 27 10:00:50 2019
New Revision: 278762
URL: https://gcc.gnu.org/viewcvs?rev=278762&root=gcc&view=rev
Log:
PR fortran/91944
* simplify.c (gfc_simplify_spread): Check gfc_init_expr_flag instead
of gfc_current_ns->sym_root->n.sym->attr.flavor == FL_PARAMETER.
* gfortran.dg/spread_size_limit_2.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/spread_size_limit_2.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/simplify.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-661512-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 10:02:20 2019
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Subject: [Bug fortran/91944] [8/9 Regression] ICE in gfc_conv_array_initializer, at fortran/trans-array.c:6156
Date: Wed, 27 Nov 2019 10:02:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Summary|[8/9/10 Regression] ICE in |[8/9 Regression] ICE in
|gfc_conv_array_initializer, |gfc_conv_array_initializer,
|at |at
|fortran/trans-array.c:6156 |fortran/trans-array.c:6156
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed on the trunk so far.
>From gcc-bugs-return-661513-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 10:05:21 2019
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Subject: [Bug tree-optimization/92689] Improve stmt_may_clobber_ref_p_1 on constant memory reference
Date: Wed, 27 Nov 2019 10:05:00 -0000
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--- Comment #2 from Feng Xue <fxue at os dot amperecomputing.com> ---
int fn();
int goo(const int *p)
{
return fn();
}
int data;
int foo (const int *p)
{
int i;
int t;
data = *p;
for (i = 0; i < 100; i++)
{
int t = *p + 1;
goo (&t);
}
return *p;
}
Compile the above with -O3 -fno-early-inlining -fno-inline
-fno-partial-inlining, and add a breakpoint at stmt_may_clobber_ref_p_1(), you
will find the call stmt_may_clobber_ref_p_1 (stmt/* data = *p; */, *p) returns
true.
>From gcc-bugs-return-661514-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 10:09:13 2019
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Subject: [Bug tree-optimization/92689] Improve stmt_may_clobber_ref_p_1 on constant memory reference
Date: Wed, 27 Nov 2019 10:09:00 -0000
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--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
The argument p could have been a non const when it was passed to foo.
That is outside of the this TU:
static int t;
void gggg(void)
{
foo (&t);
}
void fn(void)
{
t++;
}
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Subject: [Bug tree-optimization/92691] New: [10 Regression] ICE in strlen_dom_walker::before_dom_children at gcc/tree-ssa-strlen.c:5177 since r274933
Date: Wed, 27 Nov 2019 10:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92691
Bug ID: 92691
Summary: [10 Regression] ICE in
strlen_dom_walker::before_dom_children at
gcc/tree-ssa-strlen.c:5177 since r274933
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
Target Milestone: ---
I see the following ICE:
$ cat 1.i
void eloop_register_read_sock();
void hostapd_ctrl_iface_status();
void hostapd_ctrl_iface_receive() { hostapd_ctrl_iface_status(); }
void hostapd_ctrl_iface_init() {
eloop_register_read_sock(hostapd_ctrl_iface_receive);
}
$ cat 2.i
int a;
char *ptr;
void hostapd_ctrl_iface_status() {
int b;
if (b)
__builtin_snprintf(ptr, a, "asdf");
}
void hostapd_ctrl_iface_init();
int main() { hostapd_ctrl_iface_init(); return 0; }
$ gcc -O2 -flto=16 1.i 2.i
during GIMPLE pass: strlen
1.i: In function ‘hostapd_ctrl_iface_receive’:
1.i:4:6: internal compiler error: Segmentation fault
4 | void hostapd_ctrl_iface_receive() { hostapd_ctrl_iface_status(); }
| ^
0xa15d2f crash_signal
../../gcc/toplev.c:328
0x7f960989114f ???
/usr/src/debug/glibc-2.30-1.2.x86_64/signal/../sysdeps/unix/sysv/linux/x86_64/sigaction.c:0
0xba47c0 gsi_next
../../gcc/gimple-iterator.h:193
0xba47c0 strlen_dom_walker::before_dom_children(basic_block_def*)
../../gcc/tree-ssa-strlen.c:5177
0x1186db5 dom_walker::walk(basic_block_def*)
../../gcc/domwalk.c:309
0xb9aba1 printf_strlen_execute
../../gcc/tree-ssa-strlen.c:5242
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
make: *** [/tmp/cccBurgu.mk:2: /tmp/ccEQw7Iw.ltrans0.ltrans.o] Error 1
lto-wrapper: fatal error: make returned 2 exit status
compilation terminated.
/usr/bin/ld: error: lto-wrapper failed
collect2: error: ld returned 1 exit status
The test-case is reduced from hostapd package.
>From gcc-bugs-return-661516-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 10:11:30 2019
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/92691] [10 Regression] ICE in strlen_dom_walker::before_dom_children at gcc/tree-ssa-strlen.c:5177 since r274933
Date: Wed, 27 Nov 2019 10:11:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P1
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2019-11-27
Known to work| |9.2.0
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Target Milestone|--- |10.0
Ever confirmed|0 |1
Known to fail| |10.0
>From gcc-bugs-return-661517-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 10:16:33 2019
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/92689] Improve stmt_may_clobber_ref_p_1 on constant memory reference
Date: Wed, 27 Nov 2019 10:16:00 -0000
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--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Actually the testcase which causes the return true to be correct would be:
extern int data;
void gggg(void)
{
foo (&data);
}
void fn(void)
{
data++;
}
---- CUT ---
I think you need either a better testcase again.
>From gcc-bugs-return-661518-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 10:26:46 2019
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/92675] sign-conversion C++ unsigned int j = -1;
Date: Wed, 27 Nov 2019 10:26:00 -0000
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #3)
> -1u also works
Not in a template:
#include <type_traits>
template<typename U>
constexpr std::enable_if_t<std::is_unsigned<U>::value, bool>
is_max(U u)
{
#ifdef GOOD
U max = -1; // good
#else
U max = -1u; // bad
#endif
return u == max;
}
static_assert(is_max(-1ull));
This fails when GOOD isn't defined, because -1u is UINT_MAX not the maximum
value for the type.
You can use std::numeric_limits<U>::max() or U(-1) but -1 is a convenient
shorthand that does the right thing.
>From gcc-bugs-return-661519-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 10:35:06 2019
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Subject: [Bug c++/60228] ICE using lambda in #pragma omp declare reduction
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--- Comment #5 from Steffen Seckler <steffen.seckler at tum dot de> ---
(In reply to Steffen Seckler from comment #4)
> I would also like to see this supported, as the intel compiler is already
> able to support this.
fyi: the clang compiler will support lambdas inside of
#pragma omp declare reduction
as of a913e872d6e7044ae77e55c45ab3ea5304eb7262, which will most likely be in
the next release or in 9.0.1
see:
https://bugs.llvm.org/show_bug.cgi?id=44133
https://bugs.llvm.org/show_bug.cgi?id=44134
>From gcc-bugs-return-661520-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 10:52:48 2019
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Subject: [Bug tree-optimization/92689] Improve stmt_may_clobber_ref_p_1 on constant memory reference
Date: Wed, 27 Nov 2019 10:52:00 -0000
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--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Also see PR92419 which was motivated by improving handling of TREE_READONLY
declarations.
And indeed we cannot rely on const qualification of pointers in any way.
>From gcc-bugs-return-661521-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 11:02:27 2019
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Subject: [Bug tree-optimization/92691] [10 Regression] ICE in strlen_dom_walker::before_dom_children at gcc/tree-ssa-strlen.c:5177 since r274933
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Reduced testcase without -flto, just -O2 is needed:
void
foo (int x, char *y)
{
if (x != 0)
__builtin_snprintf (y, 0, "foo");
}
>From gcc-bugs-return-661522-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 11:05:10 2019
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Subject: [Bug tree-optimization/92691] [10 Regression] ICE in strlen_dom_walker::before_dom_children at gcc/tree-ssa-strlen.c:5177 since r274933
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r274933.
>From gcc-bugs-return-661523-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 11:05:35 2019
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91839
--- Comment #1 from tangyixuan <tangyixuan at mail dot dlut.edu.cn> ---
Hi, there still exists the above error defect in recent GCC: no error
suggestions about ‘l_2’. The reduced code is as follow:
static long a //error
static int f1(void; //error
static int f1(void)
{
int l_24[0] = {0};
return l_2[0]; //error
}
$ gcc-trunk -c s.c
s.c:1:14: error: expected ‘;’ before ‘static’
1 | static long a //error
| ^
| ;
2 | static int f1(void; //error
| ~~~~~~
s.c:3:13: error: storage class specified for parameter ‘f1’
3 | static int f1(void)
| ^~
s.c:4:1: error: expected ‘;’, ‘,’ or ‘)’ before ‘{’ token
4 | {
| ^
$ gcc-trunk -version
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-10-20191124/configure --prefix=/usr/local/gcc-20191124
--enable-checking=release --enable-languages=c,c++ --disable-multilib
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 10.0.0 20191124 (experimental) (GCC)
Best regards
>From gcc-bugs-return-661524-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 11:07:35 2019
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Subject: [Bug libstdc++/92688] including <regex> introduce the name index to global namespace scope
Date: Wed, 27 Nov 2019 11:07:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92688
--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to SODA Noriyuki from comment #6)
> the pthread symbols in PR 21327 become visible with -D_XOPEN_SOURCE=700
> without -D_GNU_SOURCE.
> the M_PI symbol in PR 11196 becomes visbile with -D_XOPEN_SOURCE=700 too.
> is there any other symbols which are necessary for -std=c++11, but invisible
> with -D_XOPEN_SOURCE=700 ?
Libstdc++ cannot define _XOPEN_SOURCE though, because it could conflict with
something the user defines.
The correct fix is for glibc to expose the required names by some other method
(a "backdoor" just for libstdc++) and not require any feature macros that users
should be able to control. If a user doesn't want _XOPEN_SOURCE or _GNU_SOURCE
then they should have the option to leave them undefined.
I still plan to fix this, but it's not a top priority.
This is really a dup of PR 11196 since it's the automatic definition of
_GNU_SOURCE that causes non-standard names to be declared by glibc.
*** This bug has been marked as a duplicate of bug 11196 ***
>From gcc-bugs-return-661525-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 11:07:35 2019
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Subject: [Bug libstdc++/11196] _GNU_SOURCE vs. M_PI
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |boostcpp at gmail dot com
--- Comment #17 from Jonathan Wakely <redi at gcc dot gnu.org> ---
*** Bug 92688 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-661526-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 11:08:30 2019
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Subject: [Bug tree-optimization/92691] [10 Regression] ICE in strlen_dom_walker::before_dom_children at gcc/tree-ssa-strlen.c:5177 since r274933
Date: Wed, 27 Nov 2019 11:08:00 -0000
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--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #2)
> Started with r274933.
Yep, it's already mentioned in the PR title :)
>From gcc-bugs-return-661527-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 11:10:16 2019
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/92692] New: Saving off the callee saved register between ldxr/stxr (caused by shrink wrapping improvements)
Date: Wed, 27 Nov 2019 11:10:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92692
Bug ID: 92692
Summary: Saving off the callee saved register between ldxr/stxr
(caused by shrink wrapping improvements)
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Keywords: wrong-code
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: pinskia at gcc dot gnu.org
Target Milestone: ---
Target: aarch64-linux-gnu
Created attachment 47375
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47375&action=edit
compile at -O2
This was originally reported at
https://sourceware.org/bugzilla/show_bug.cgi?id=24924 but it turns out the
issue is a gcc issue and a glibc issue.
The UNSPECV_ATOMIC_CMPSW:
(insn 177 176 1270 17 (parallel [
(set (reg:CC 66 cc)
(unspec_volatile:CC [
(const_int 0 [0])
] UNSPECV_ATOMIC_CMPSW))
(set (reg:SI 8 x8 [251])
(mem/v:SI (reg/f:DI 16 x16 [orig:346 _41 ] [346]) [-1 S4
A32]))
(set (mem/v:SI (reg/f:DI 16 x16 [orig:346 _41 ] [346]) [-1 S4
A32])
(unspec_volatile:SI [
(reg:SI 1 x1 [orig:117 _42 ] [117])
(reg:SI 5 x5 [249])
(const_int 1 [0x1])
(const_int 2 [0x2])
(const_int 0 [0])
] UNSPECV_ATOMIC_CMPSW))
(clobber (reg:SI 19 x19 [363]))
]) "pthread_rwlock_common.c":687:135 3712 {aarch64_compare_and_swapsi}
(nil))
Is split (after register allocator/reload) into:
(insn 1580 176 1581 17 (set (reg:SI 8 x8 [251])
(unspec_volatile:SI [
(mem/v:SI (reg/f:DI 16 x16 [orig:346 _41 ] [346]) [-1 S4 A32])
(const_int 2 [0x2])
] UNSPECV_LX)) "pthread_rwlock_common.c":687:135 3842
{aarch64_load_exclusivesi}
(nil))
(insn 1581 1580 1582 17 (set (reg:CC 66 cc)
(compare:CC (reg:SI 8 x8 [251])
(reg:SI 1 x1 [orig:117 _42 ] [117])))
"pthread_rwlock_common.c":687:135 447 {cmpsi}
(nil))
(jump_insn 1582 1581 1616 17 (set (pc)
(if_then_else (ne (reg:CC 66 cc)
(const_int 0 [0]))
(label_ref:DI 1585)
(pc))) "pthread_rwlock_common.c":687:135 9 {condjump}
(int_list:REG_BR_PROB 536868 (nil))
-> 1585)
...
(insn 1583 1616 1584 99 (parallel [
(set (reg:SI 19 x19 [363])
(unspec_volatile:SI [
(const_int 0 [0])
] UNSPECV_SX))
(set (mem/v:SI (reg/f:DI 16 x16 [orig:346 _41 ] [346]) [-1 S4
A32])
(unspec_volatile:SI [
(reg:SI 5 x5 [249])
(const_int 2 [0x2])
] UNSPECV_SX))
]) "pthread_rwlock_common.c":687:135 3847 {aarch64_store_exclusivesi}
(nil))
(insn 1584 1583 1585 99 (set (reg:CC 66 cc)
(compare:CC (reg:SI 19 x19 [363])
(const_int 0 [0]))) "pthread_rwlock_common.c":687:135 447 {cmpsi}
(nil))
Which is ok, but notice the register x19. It is a callee saved register but it
is only used in the UNSPECV_SX/compare.
After .pro_and_epilogue:
We get for the UNSPECV_SX/compare:
(insn/f 1659 1616 1583 25 (set (mem/c:DI (plus:DI (reg/f:DI 31 sp)
(const_int 16 [0x10])) [38 S8 A8])
(reg:DI 19 x19)) -1
(expr_list:REG_CFA_OFFSET (set (mem/c:DI (plus:DI (reg/f:DI 31 sp)
(const_int 16 [0x10])) [38 S8 A8])
(reg:DI 19 x19))
(nil)))
(insn 1583 1659 1584 25 (parallel [
(set (reg:SI 19 x19 [363])
(unspec_volatile:SI [
(const_int 0 [0])
] UNSPECV_SX))
(set (mem/v:SI (reg/f:DI 16 x16 [orig:346 _41 ] [346]) [-1 S4
A32])
(unspec_volatile:SI [
(reg:SI 5 x5 [249])
(const_int 2 [0x2])
] UNSPECV_SX))
]) "pthread_rwlock_common.c":687:135 3847 {aarch64_store_exclusivesi}
(nil))
(insn 1584 1583 1661 25 (set (reg:CC 66 cc)
(compare:CC (reg:SI 19 x19 [363])
(const_int 0 [0]))) "pthread_rwlock_common.c":687:135 447 {cmpsi}
(nil))
(insn/f 1661 1584 1585 25 (set (reg:DI 19 x19)
(mem/c:DI (plus:DI (reg/f:DI 31 sp)
(const_int 16 [0x10])) [38 S8 A8]))
"pthread_rwlock_common.c":687:135 -1
(expr_list:REG_CFA_RESTORE (reg:DI 19 x19)
(nil)))
---- CUT ---
This causes UNSPECV_SX to always fail on a few AARCH64 targets
(ThunderX1/OcteonTX1 and OcteonTX2).
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/92692] [9/10 Regression] Saving off the callee saved register between ldxr/stxr (caused by shrink wrapping improvements)
Date: Wed, 27 Nov 2019 11:10:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
See Also| |https://sourceware.org/bugz
| |illa/show_bug.cgi?id=24924
Target Milestone|--- |9.3
Summary|Saving off the callee saved |[9/10 Regression] Saving
|register between ldxr/stxr |off the callee saved
|(caused by shrink wrapping |register between ldxr/stxr
|improvements) |(caused by shrink wrapping
| |improvements)
Severity|normal |blocker
>From gcc-bugs-return-661529-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 11:34:13 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/92691] [10 Regression] ICE in strlen_dom_walker::before_dom_children at gcc/tree-ssa-strlen.c:5177 since r274933
Date: Wed, 27 Nov 2019 11:34:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|msebor at gcc dot gnu.org |jakub at gcc dot gnu.org
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 47376
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47376&action=edit
gcc10-pr92691.patch
Missed that, sorry.
Anyway, here is untested fix.
>From gcc-bugs-return-661530-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 11:36:01 2019
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Subject: [Bug c/92392] -Wignored-qualifiers points to diff location
Date: Wed, 27 Nov 2019 11:36:00 -0000
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--- Comment #1 from tangyixuan <tangyixuan at mail dot dlut.edu.cn> ---
Hi, I replace the ‘int32_t’ with other identifier(here I replaced that with
abc):
1st case:
cat s.c
typedef int abc;
static abc * const f1(void);
gcc-trunk -c -Wignored-qualifiers s.c
s.c:2:8: warning: type qualifiers ignored on function return type
[-Wignored-qualifiers]
2 | static abc * const f1(void);
| ^~~~~~~
When the redefinition of ‘int’ is not used here:
2nd cast:
cat s.c
static int * const f1(void);
gcc-trunk -c -Wignored-qualifiers s.c
s.c:1:20: warning: type qualifiers ignored on function return type
[-Wignored-qualifiers]
1 | static int * const f1(void);
| ^~
So, there maybe a warning defect on which type qualifiers is invalid.
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Subject: [Bug tree-optimization/92005] [10 Regression] switch code generation regression
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Subject: [Bug debug/46558] dbgcnt.c messages not marked for translation
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Subject: [Bug ipa/88702] [8/9/10 regression] We do terrible job optimizing IsHTMLWhitespace from Firefox
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From: "matthijs at stdin dot nl" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/92693] New: Inconsistency between __UINTPTR_TYPE__ and __UINT32_TYPE__ on ARM
Date: Wed, 27 Nov 2019 12:06:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92693
Bug ID: 92693
Summary: Inconsistency between __UINTPTR_TYPE__ and
__UINT32_TYPE__ on ARM
Product: gcc
Version: 7.3.1
Status: UNCONFIRMED
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Gcc defines a number of macros for types, which are used by stdint.h to define
the corresponding typedefs. In particular, I'm looking at uintptr_t. On ARM,
this is 32-bits and equals unsigned int:
#define __UINTPTR_TYPE__ unsigned int
In my code, I was running into problems trying to pass a uintptr_t to a
function that has overloads for uint8_t, uint16_t and uint32_t (ambigious
function call). Investigating, it turns out that uint32_t is defined as long
unsigned int:
#define __UINT32_TYPE__ long unsigned int
I would expect that, since both types are 32-bit long, they would actually
resolve to the same type. This would also make overload resolution work as
expected. Is there any reason for this inconsistency, or could it be fixed?
To test this, I installed the gcc-arm-none-eabi, version 15:7-2018-q2-6 from
Ubuntu Disco (same version should be in Debian testing):
$ arm-none-eabi-gcc --version
arm-none-eabi-gcc (15:7-2018-q2-6) 7.3.1 20180622 (release)
[ARM/embedded-7-branch revision 261907]
Copyright (C) 2017 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
$ arm-none-eabi-gcc -dM -E -x c++ /dev/null |egrep '(UINTPTR_TYPE|UINT32_TYPE)'
#define __UINT32_TYPE__ long unsigned int
#define __UINTPTR_TYPE__ unsigned int
I see the same problem using gcc 8.2.1 shipped with the STM32 arduino core
(https://github.com/stm32duino/Arduino_Core_STM32).
To illustrate the original problem I was seeing, here's a small testcase:
$ cat foo.cpp
#include <stdint.h>
void func(uint16_t);
void func(uint32_t);
int main() {
func((uintptr_t)nullptr);
static_assert(sizeof(uintptr_t) == sizeof(uint32_t), "Sizes not
equal");
}
$ arm-none-eabi-gcc -c foo.cpp
foo.cpp: In function 'int main()':
foo.cpp:7:25: error: call of overloaded 'func(uintptr_t)' is ambiguous
func((uintptr_t)nullptr);
^
foo.cpp:3:6: note: candidate: void func(uint16_t)
void func(uint16_t);
^~~~
foo.cpp:4:6: note: candidate: void func(uint32_t)
void func(uint32_t);
^~~~
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Subject: =?UTF-8?B?W0J1ZyB0YXJnZXQvOTI2OTRdIE5ldzogQ2FuJ3QgYnVpbGQgcG93ZXJwYy1l?= =?UTF-8?B?YWJpIGNyb3NzIGNvbXBpbGVyOiA8YnVpbHQtaW4+OiBmYXRhbCBlcnJvcjog?= =?UTF-8?B?aW50ZXJuYWwgZXJyb3I6IGJ1aWx0aW4gZnVuY3Rpb24g4oCYX19idWlsdGlu?= =?UTF-8?B?X2RkZWRwZOKAmSBoYWQgYW4gdW5leHBlY3RlZCByZXR1cm4gdHlwZSDigJhE?= =?UTF-8?B?ROKAmQ==?Date: Wed, 27 Nov 2019 12:07:00 -0000
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Bug ID: 92694
Summary: Can't build powerpc-eabi cross compiler: <built-in>:
fatal error: internal error: builtin function
‘__builtin_ddedpd’ had an unexpected return type ‘DD’
Product: gcc
Version: unknown
Status: UNCONFIRMED
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Priority: P3
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I'm trying to build a powerpc-eabi cross compiler from git sources, and am
getting the following:
/home/green/BUG/build-gcc1/./gcc/xgcc -B/home/green/BUG/build-gcc1/./gcc/ -xc
-nostdinc /dev/null -S -o /dev/null
-fself-test=/home/green/git/gcc/gcc/testsuite/selftests
<built-in>: fatal error: internal error: builtin function ‘__builtin_ddedpd’
had an unexpected return type ‘DD’
compilation terminated.
<built-in>: fatal error: internal error: builtin function ‘__builtin_ddedpd’
had an unexpected return type ‘DD’
compilation terminated.
make[2]: *** [/home/green/git/gcc/gcc/c/Make-lang.in:124: s-selftest-c] Error 1
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Subject: [Bug tree-optimization/92222] [9 Regression] ice in useless_type_conversion_p, at gimple-expr.c:86
Date: Wed, 27 Nov 2019 12:10:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |9.2.1
Resolution|--- |FIXED
--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug tree-optimization/92222] [9 Regression] ice in useless_type_conversion_p, at gimple-expr.c:86
Date: Wed, 27 Nov 2019 12:10:00 -0000
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--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Nov 27 12:09:36 2019
New Revision: 278763
URL: https://gcc.gnu.org/viewcvs?rev=278763&root=gcc&view=rev
Log:
2019-11-27 Richard Biener <rguenther@suse.de>
Backport from mainline
2019-10-25 Richard Biener <rguenther@suse.de>
PR tree-optimization/92222
* tree-vect-slp.c (_slp_oprnd_info::first_pattern): Remove.
(_slp_oprnd_info::second_pattern): Likewise.
(_slp_oprnd_info::any_pattern): New.
(vect_create_oprnd_info): Adjust.
(vect_get_and_check_slp_defs): Compute whether any stmt is
in a pattern.
(vect_build_slp_tree_2): Avoid building up a node from scalars
if any of the operand defs, not just the first, is in a pattern.
* gcc.dg/torture/pr92222.c: New testcase.
Added:
branches/gcc-9-branch/gcc/testsuite/gcc.dg/torture/pr92222.c
Modified:
branches/gcc-9-branch/gcc/ChangeLog
branches/gcc-9-branch/gcc/testsuite/ChangeLog
branches/gcc-9-branch/gcc/tree-vect-slp.c
>From gcc-bugs-return-661539-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 12:17:31 2019
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Subject: [Bug tree-optimization/92690] [10 Regression] vector CTOR optimization performs invalid conversion
Date: Wed, 27 Nov 2019 12:17:00 -0000
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Nov 27 12:16:54 2019
New Revision: 278764
URL: https://gcc.gnu.org/viewcvs?rev=278764&root=gcc&view=rev
Log:
2019-11-27 Richard Biener <rguenther@suse.de>
PR tree-optimization/92690
* tree-ssa-forwprop.c (simplify_vector_constructor): Avoid
converting elements not originally converted.
* gcc.dg/torture/pr92690.c: New testcase.
* gcc.dg/tree-ssa/forwprop-35.c: Adjust.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr92690.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/tree-ssa/forwprop-35.c
trunk/gcc/tree-ssa-forwprop.c
>From gcc-bugs-return-661540-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 12:45:47 2019
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Subject: [Bug ipa/92476] [10 regression] SEGV in cgraph_edge_brings_value_p
Date: Wed, 27 Nov 2019 12:45:00 -0000
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--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
And I have one more test-case reduced from rubygem-passenger:
$ cat kit.ii
namespace Passenger {
namespace Json {
class Value;
}
namespace ConfigKit {
class Translator;
}
namespace LoggingKit {
void initialize(const Json::Value &, const ConfigKit::Translator &) {}
} // namespace LoggingKit
} // namespace Passenger
$ cat hooks.ii
namespace Passenger {
namespace Json {
class Value {};
} // namespace Json
namespace ConfigKit {
class Translator {};
} // namespace ConfigKit
namespace LoggingKit {
void initialize(const Json::Value & = Json::Value(),
const ConfigKit::Translator & = ConfigKit::Translator());
void init_module() { initialize(); }
} // namespace LoggingKit
} // namespace Passenger
$ c++ -o kit.o -O2 -fPIC -flto=auto -fPIC -fvisibility=hidden -c kit.ii
$ c++ -o hooks.o -fPIC -flto=auto -fPIC -fvisibility=hidden -c hooks.ii
$ c++ -shared hooks.o -fPIC -o mod_passenger.so kit.o
during IPA pass: cp
lto1: internal compiler error: Segmentation fault
0xa15d2f crash_signal
../../gcc/toplev.c:328
0x7f096d32e14f ???
/usr/src/debug/glibc-2.30-1.2.x86_64/signal/../sysdeps/unix/sysv/linux/x86_64/sigaction.c:0
0x5ca09a set_single_call_flag
../../gcc/ipa-cp.c:1170
0x670cd4 cgraph_node::call_for_symbol_thunks_and_aliases(bool (*)(cgraph_node*,
void*), void*, bool, bool)
../../gcc/cgraph.c:2267
0x11f6a11 initialize_node_lattices
../../gcc/ipa-cp.c:1197
0x11f6a11 ipcp_propagate_stage
../../gcc/ipa-cp.c:3701
0x11fa8f4 ipcp_driver
../../gcc/ipa-cp.c:5560
0x11fa8f4 execute
../../gcc/ipa-cp.c:5653
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
lto-wrapper: fatal error: c++ returned 1 exit status
compilation terminated.
/usr/bin/ld: error: lto-wrapper failed
collect2: error: ld returned 1 exit status
>From gcc-bugs-return-661541-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 12:56:45 2019
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From: "lutztonineubert at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/92695] New: [10, 9] P1064R0 - virtual constexpr fails if object taken from array
Date: Wed, 27 Nov 2019 12:56:00 -0000
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Bug ID: 92695
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The following code fails with:
-> error: expression 'A::get' is not a constant expression
Compiled with `-std=c++2a` under GCC-9.2 and GCC-trunk. It works under
Clang-trunk.
```
struct A {
constexpr virtual int get() = 0;
};
struct B : A {
constexpr int get() override {
return 10;
}
};
struct Foo {
B b[1] = {};
constexpr A * get_a() {
// Seems to be the problem.
return &(b[0]);
}
};
constexpr int get() {
Foo f;
return f.get_a()->get();
}
constexpr auto a = get();
int main() {
return a;
}
```
The dereferencing of the array seems to be the problem.
See online here: https://gcc.godbolt.org/z/ZSXAfb
>From gcc-bugs-return-661542-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 13:19:12 2019
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Subject: [Bug target/92693] Inconsistency between __UINTPTR_TYPE__ and __UINT32_TYPE__ on ARM
Date: Wed, 27 Nov 2019 13:19:00 -0000
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Matthijs Kooijman from comment #0)
> I would expect that, since both types are 32-bit long, they would actually
> resolve to the same type. This would also make overload resolution work as
> expected. Is there any reason for this inconsistency, or could it be fixed?
I don't see why you should expect that, there's nothing in the standards
suggesting it should be the case.
Changing it would be an ABI change, so seems like a bad idea.
>From gcc-bugs-return-661543-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 13:21:18 2019
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Subject: [Bug target/92693] Inconsistency between __UINTPTR_TYPE__ and __UINT32_TYPE__ on ARM
Date: Wed, 27 Nov 2019 13:21:00 -0000
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
N.B. you get exactly the same overload failure if you call func(1u). The
problem is your overload set, not the definition of uintptr_t.
>From gcc-bugs-return-661544-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 13:33:13 2019
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From: "matthijs at stdin dot nl" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/92693] Inconsistency between __UINTPTR_TYPE__ and __UINT32_TYPE__ on ARM
Date: Wed, 27 Nov 2019 13:33:00 -0000
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--- Comment #3 from Matthijs Kooijman <matthijs at stdin dot nl> ---
> I don't see why you should expect that, there's nothing in the standards suggesting it should be the case.
This is true, current behaviour is standards-compliant AFAICS. However, I
expect that because it would be consistent, and would make things behave with
least surprise (at least for the usecase I suggested).
> Changing it would be an ABI change, so seems like a bad idea.
Good point.
I did a bit more searching and found this Linux kernel patch. The commit
message suggests that it might at some point have been consistent:
https://patchwork.kernel.org/patch/2845139/
I assume that "bare metal GCC" would refer to the __xxx_TYPE__ macros, or at
least whatever you get when you include <stdint.h>.
> N.B. you get exactly the same overload failure if you call func(1u). The problem is your overload set, not the definition of uintptr_t.
Fair point, though I think that it is hard to define a proper overload set
here. In my case, I'm defining functions to print various sizes of integers.
Because the body of the function needs to know how big the type is, I'm using
the
uintxx_t types to define them. I could of course define the function for
(unsigned) char, short, int, long, long long, but then I can't make any
assumptions about the exact size of each (I could use sizeof and make a generic
implementation, but I wanted to keep things simple and use a different
implementation for each size).
I guess this might boil down to C/C++ being annoying when it comes to integer
types, and not something GCC can really fix (though it *would* have been more
convenient if this had been consistent from the start).
Feel free to close if that seems appropriate.
>From gcc-bugs-return-661545-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 13:36:44 2019
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Subject: [Bug rtl-optimization/92283] [10 Regression] 454.calculix miscomparison since r276645 with -O2 -march=znver2
Date: Wed, 27 Nov 2019 13:36:00 -0000
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--- Comment #24 from Vladimir Makarov <vmakarov at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #23)
> Vladimir, can you look into this LRA inheritance issue?
Yes, I've started to work on this. I can not reproduce it on the current
trunk. But yesterday, I've reproduced it on the revision mentioned in the
title.
Inheritance problems are usually hard to fix. So I can not say when I find a
reason for the problem and solution for it. But I guess it will be fixed on
the next week.
>From gcc-bugs-return-661546-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 13:37:51 2019
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From: "soda-gnu at yuruyuru dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/92688] including <regex> introduce the name index to global namespace scope
Date: Wed, 27 Nov 2019 13:37:00 -0000
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--- Comment #8 from SODA Noriyuki <soda-gnu at yuruyuru dot net> ---
> Libstdc++ cannot define _XOPEN_SOURCE though,
> because it could conflict with something the user defines.
Yeah, it has similar problem with _GNU_SOURCE,
_XOPEN_SOURCE is only closer to what it should be.
> The correct fix is for glibc to expose the required names
> by some other method (a "backdoor" just for libstdc++)
> and not require any feature macros that users should be able to control.
I understand.
> I still plan to fix this, but it's not a top priority.
I hope you'll have some spare time to do so in near future ;-)
Thanks for taking you time to explain the issues.
>From gcc-bugs-return-661547-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 13:41:21 2019
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Subject: [Bug ipa/92609] [10 Regression] ICE in warn_types_mismatch, at ipa-devirt.c:1000 since r265519
Date: Wed, 27 Nov 2019 13:41:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |marxin at gcc dot gnu.org
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
I've got a patch candidate for this.
>From gcc-bugs-return-661548-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 13:42:17 2019
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Subject: [Bug target/92693] Inconsistency between __UINTPTR_TYPE__ and __UINT32_TYPE__ on ARM
Date: Wed, 27 Nov 2019 13:42:00 -0000
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Matthijs Kooijman from comment #3)
> Fair point, though I think that it is hard to define a proper overload set
> here. In my case, I'm defining functions to print various sizes of integers.
> Because the body of the function needs to know how big the type is, I'm
> using the
> uintxx_t types to define them. I could of course define the function for
> (unsigned) char, short, int, long, long long, but then I can't make any
> assumptions about the exact size of each (I could use sizeof and make a
> generic implementation, but I wanted to keep things simple and use a
> different implementation for each size).
void func(uint8_t);
void func(uint16_t);
void func(uint32_t);
void func(uint64_t);
template<typename T>
std::enable_if_t<std::is_unsigned<T>::value> func(T t)
{
if (sizeof(T) == sizeof(uint8_t))
func((uint8_t)t);
else if (sizeof(T) == sizeof(uint16_t))
func((uint16_t)t);
else if (sizeof(T) == sizeof(uint32_t))
func((uint32_t)t);
else if (sizeof(T) == sizeof(uint64_t))
func((uint64_t)t);
}
>From gcc-bugs-return-661549-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 13:54:34 2019
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Subject: [Bug fortran/92123] [F2018/array-descriptor] Scalar allocatable/pointer with array descriptor (via bind(C)): ICE with select rank or error scalar variable with POINTER or ALLOCATABLE in procedure with BIND(C) is not yet supported
Date: Wed, 27 Nov 2019 13:54:00 -0000
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--- Comment #20 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 47377
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47377&action=edit
gcc10-fnspec-test.patch
Just for archival purposes, here is a short gcc plugin that allows testing "fn
spec" attribute (on direct function calls only, not on indirect calls), by
registering a fn_spec attribute and remapping it to "fn spec" when finish_decl
is called.
>From gcc-bugs-return-661550-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 13:58:15 2019
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From: "lutztonineubert at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/92695] P1064R0 - virtual constexpr fails if object taken from array
Date: Wed, 27 Nov 2019 13:58:00 -0000
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--- Comment #1 from Toni Neubert <lutztonineubert at gmail dot com> ---
Future more, the following example also fails. Could be the same root cause but
another error message appears:
accessing value of 'f.Foo::b[0].B::<anonymous>' through a 'B' glvalue in a
constant expression
Clang is just fine with it.
```
struct A {
constexpr virtual int get() = 0;
constexpr virtual int set(A *o) = 0;
};
struct B : A {
constexpr int get() override {
return 10;
}struct A {
constexpr virtual int get() = 0;
constexpr virtual int set(A *o) = 0;
};
struct B : A {
constexpr int get() override {
return 10;
}
constexpr int set(A *o) override {
a = o;
return 20;
}
A *a{};
};
constexpr auto addressof = [](A &n) {
return &n;
};
struct Foo {
B b[1];
A* curr_{addressof(b[0])};
constexpr int add() {
return curr_->set(addressof(b[0]));
}
};
constexpr int get() {
Foo f;
return f.add();
}
constexpr auto a = get();
int main() {
return a;
}
constexpr int set(A *o) override {
a = o;
return 20;
}
A *a{};
};
constexpr auto addressof = [](A &n) {
return &n;
};
struct Foo {
B b[1];
A* curr_{addressof(b[0])};
constexpr int add() {
return curr_->set(addressof(b[0]));
}
};
constexpr int get() {
Foo f;
return f.add();
}
constexpr auto a = get();
int main() {
return a;
}
```
See online here: https://gcc.godbolt.org/z/4ZwFAN
>From gcc-bugs-return-661551-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 14:00:59 2019
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From: "lutztonineubert at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/92695] P1064R0 - virtual constexpr fails if object taken from array
Date: Wed, 27 Nov 2019 14:00:00 -0000
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--- Comment #2 from Toni Neubert <lutztonineubert at gmail dot com> ---
Copy paste error. The above example should be:
```
struct A {
constexpr virtual int get() = 0;
constexpr virtual int set(A *o) = 0;
};
struct B : A {
constexpr int get() override {
return 10;
}
constexpr int set(A *o) override {
a = o;
return 20;
}
A *a{};
};
constexpr auto addressof = [](A &n) {
return &n;
};
struct Foo {
B b[1];
A* curr_{addressof(b[0])};
constexpr int add() {
return curr_->set(addressof(b[0]));
}
};
constexpr int get() {
Foo f;
return f.add();
}
constexpr auto a = get();
int main() {
return a;
}
```
>From gcc-bugs-return-661552-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 14:08:11 2019
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Subject: [Bug lto/92599] ICE in speculative_call_info, at cgraph.c:1142
Date: Wed, 27 Nov 2019 14:08:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |10.0
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
So we ICE at the end of cgraph_edge::speculative_call_info:
(gdb) p ref
$4 = <ipa_ref* 0x0>
(gdb) p e
$5 = <cgraph_edge* 0x7ffff769b5b0 (<cgraph_node * 0x7ffff74ac160
"ConvertASEToModelSurfaces.constprop"/113> -> <cgraph_node * 0x7ffff74ac420
"NumSurfaces"/115>)>
(gdb) p e2
$6 = <cgraph_edge* 0x7ffff769b750 (<cgraph_node * 0x7ffff74ac160
"ConvertASEToModelSurfaces.constprop"/113> -> <cgraph_node * 0x0>)>
As seen the edge is within idRenderModelStatic class.
I bet the problem is the ODR warning message, the class is polymorphic in one
TU, and normal class in another one.
>From gcc-bugs-return-661553-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 14:09:51 2019
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Subject: [Bug ipa/92372] [10 Regression] ICE in ipa_update_overall_fn_summary at gcc/ipa-fnsummary.c:3671 since r277780
Date: Wed, 27 Nov 2019 14:09:00 -0000
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
@Honza?
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Subject: [Bug target/92190] [10 Regression] ICE in sp_valid_at, at config/i386/i386.c:6162 since r276648
Date: Wed, 27 Nov 2019 14:20:00 -0000
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--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
@Uros: Any update about this? Do you know about somebody who can help us with
an answer to your question?
>From gcc-bugs-return-661555-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 14:21:28 2019
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Subject: [Bug d/91916] Maybe a dead code in socket.d
Date: Wed, 27 Nov 2019 14:21:00 -0000
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
@Iain: ping^2
>From gcc-bugs-return-661556-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 14:23:09 2019
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/92645] Hand written vector code is 450 times slower when compiled with GCC compared to Clang
Date: Wed, 27 Nov 2019 14:23:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |hjl.tools at gmail dot com,
| |uros at gcc dot gnu.org
--- Comment #12 from Richard Biener <rguenth at gcc dot gnu.org> ---
So it's probably better but not great yet. It would help tremendously to look
at PR92658, for this testcase we specifically need truncv16hiv16qi2 which
can be implemented with pshufb (maybe also better). I tried the following
(the upper half of the selector is just "garbage")
(define_expand "truncv16hiv16qi2"
[(set (subreg:V32QI (match_operand:V16QI 0 "register_operand") 0)
(vec_select:V32QI
(subreg:V32QI (match_operand:V16HI 1 "register_operand") 0)
(parallel [(const_int 0) (const_int 2)
(const_int 4) (const_int 6)
(const_int 8) (const_int 10)
(const_int 12) (const_int 14)
(const_int 16) (const_int 18)
(const_int 20) (const_int 22)
(const_int 24) (const_int 26)
(const_int 28) (const_int 30)
(const_int 0) (const_int 2)
(const_int 4) (const_int 6)
(const_int 8) (const_int 10)
(const_int 12) (const_int 14)
(const_int 16) (const_int 18)
(const_int 20) (const_int 22)
(const_int 24) (const_int 26)
(const_int 28) (const_int 30)
])))]
"TARGET_AVX2")
but that isn't recognized. Possibly because of the outer subreg, who
knows.
(define_insn "truncv16hiv16qi2"
[(set (match_operand:V16QI 0 "register_operand" "=x,v")
(truncate:V16QI
(match_operand:V16HI 1 "register_operand" "x,v")))]
"TARGET_AVX2"
"@
pshufb\t{%1, %0|%0, %1}
vpshufb\t{%1, %0|%0, %1}")
"works" but of course is wrong (somehow need the constant mask in a
register). The rest of the backend also doesn't know truncate of
vectors so representing as shuffles is probably better.
I also wonder how to macroize all this - probably via some
helpers in i386-expand.c I guess.
But I can also work with the pack/unpack tree codes for now.
>From gcc-bugs-return-661557-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 14:25:24 2019
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Subject: [Bug rtl-optimization/90007] [9/10 Regression] ICE in extract_constrain_insn_cached, at recog.c:2223
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--- Comment #12 from Vladimir Makarov <vmakarov at gcc dot gnu.org> ---
Author: vmakarov
Date: Wed Nov 27 14:24:47 2019
New Revision: 278770
URL: https://gcc.gnu.org/viewcvs?rev=278770&root=gcc&view=rev
Log:
2019-11-27 Vladimir Makarov <vmakarov@redhat.com>
PR rtl-optimization/90007
* recog.c (constrain_operands): Permit hard registers too for
memory when LRA is used.
2019-11-27 Vladimir Makarov <vmakarov@redhat.com>
PR rtl-optimization/90007
* gcc.target/i386/pr90007.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr90007.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/recog.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug rtl-optimization/92510] [10 Regression] ICE in native_encode_rtx, at simplify-rtx.c:6272
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |segher at gcc dot gnu.org
--- Comment #3 from Segher Boessenkool <segher at gcc dot gnu.org> ---
This is caused by r275959, the commit that added this assert.
combine does
Trying 14 -> 15:
14: r96:V1DI#0=flags:CCZ!=0
REG_DEAD flags:CCZ
15: {r99:DI=r100:DI|r96:V1DI#0;clobber flags:CC;}
REG_DEAD r100:DI
REG_UNUSED flags:CC
REG_DEAD r96:V1DI
Failed to match this instruction:
(parallel [
(set (reg:DI 99 [ vect_sq_12.9 ])
(ior:DI (ne:DI (reg:CCZ 17 flags)
(const_int 0 [0]))
(reg:DI 100)))
(clobber (reg:CC 17 flags))
])
Failed to match this instruction:
(set (reg:DI 99 [ vect_sq_12.9 ])
(ior:DI (ne:DI (reg:CCZ 17 flags)
(const_int 0 [0]))
(reg:DI 100)))
and that is all perfectly okay (the subregs here are mode DI, one of the
crucial things slim doesn't print).
>From gcc-bugs-return-661558-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 14:28:47 2019
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Subject: [Bug lto/92600] ICE: symtab_node::verify failed, building 523.xalancbmk_r with -flto -fno-inline
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-invalid-code
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=92599
--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
It's related to PR92599. It's also an ODR violation that leads to the ICE.
>From gcc-bugs-return-661560-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 14:29:13 2019
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Subject: [Bug lto/92599] ICE in speculative_call_info, at cgraph.c:1142
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords|ice-on-valid-code |ice-on-invalid-code
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |hubicka at gcc dot gnu.org
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Subject: [Bug target/92190] [10 Regression] ICE in sp_valid_at, at config/i386/i386.c:6162 since r276648
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--- Comment #5 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Martin Liška from comment #4)
> @Uros: Any update about this? Do you know about somebody who can help us
> with an answer to your question?
This is MS ABI, so perhaps cygwin/mingw-w64 maintainer could review the ABI
issues in the compiler.
>From gcc-bugs-return-661562-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 14:47:20 2019
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Subject: [Bug lto/91574] [10 Regression] ICE in types_same_for_odr at gcc/ipa-devirt.c:355 since r272037
Date: Wed, 27 Nov 2019 14:47:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|hubicka at gcc dot gnu.org |marxin at gcc dot gnu.org
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
I've got a patch candidate for this.
>From gcc-bugs-return-661563-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 14:48:30 2019
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Subject: [Bug target/92190] [10 Regression] ICE in sp_valid_at, at config/i386/i386.c:6162 since r276648
Date: Wed, 27 Nov 2019 14:48:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
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CC| |10walls at gmail dot com
--- Comment #6 from Martin Liška <marxin at gcc dot gnu.org> ---
I'm adding our maintainer to CC.
>From gcc-bugs-return-661564-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 14:49:35 2019
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Subject: [Bug rtl-optimization/92510] [10 Regression] ICE in native_encode_rtx, at simplify-rtx.c:6272
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Sure, before that we would punt much earlier at simplification of the
non-sensical subreg.
I don't mind if simplify_subreg doesn't call native_encode_rtx in the cases
where it ICEs and instead fails.
But, I believe what gen_lowpart_for_combine does for comparisons is completely
wrong for non-scalar modes that are different from their previous mode.
A same sized subreg of something is reinterpretation of the bits of something
as something else, VIEW_CONVERT_EXPR or type punning through union.
Changing the mode of a comparison isn't like that.
Consider:
typedef char __v8qi __attribute__((vector_size (8)));
void
foo (int x, __v8qi *y)
{
union U { __v8qi v; unsigned long long l; } u;
u.l = x > 36;
*y = *y + u.v;
}
on x86_64-linux, I see (subreg:V8QI (gt:DI (reg:CCGC 17 flags) (const_int 0
[0])) 0) in the dumps but for some reason gen_lowpart_for_combine actually
hasn't been called except to convert originally gt:QI to gt:DI (that is
correct). If it would be called, it would turn it into a completely bogus
(gt:V8QI (reg:CCGC 17 flags) (const_int 0 [0])), which isn't clear what it
actually would mean.
(gt:V8QI (reg:V8QI ...) (reg:V8QI ...)) performs 8 comparisons and fills in the
resulting vector with 8 0/-1 values, similarly (gt:V8QI (reg:V8QI ...)
(const_vector:V8QI ...)). But if both operands of the comparison are scalar
and result is a vector, what it is?
>From gcc-bugs-return-661565-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 14:57:47 2019
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Subject: [Bug preprocessor/92696] New: #pragma GCC diagnostic ... interferes with if/else
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At least with "gcc (GCC) 9.2.1 20190827 (Red Hat 9.2.1-1)" and with recent GCC
10 trunk:
> $ cat test.c
> void f(int);
> void g(int b) {
> if (b)
> f(0);
> #pragma GCC diagnostic ignored "-Wformat"
> else
> f(1);
> }
> $ gcc -fsyntax-only test.c
> test.c: In function ‘g’:
> test.c:6:3: error: ‘else’ without a previous ‘if’
> 6 | else
> | ^~~~
>From gcc-bugs-return-661566-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 14:58:05 2019
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Subject: [Bug tree-optimization/92645] Hand written vector code is 450 times slower when compiled with GCC compared to Clang
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--- Comment #13 from Richard Biener <rguenth at gcc dot gnu.org> ---
So with all tricks I arrive at the following for the reduced testcase
f:
.LFB2:
.cfi_startproc
pushq %rbp
.cfi_def_cfa_offset 16
.cfi_offset 6, -16
movl %ecx, %r9d
vpxor %xmm4, %xmm4, %xmm4
movl $255, %eax
shrl $24, %r9d
subl %r9d, %eax
movq %rsp, %rbp
.cfi_def_cfa_register 6
andq $-32, %rsp
movl %eax, %r8d
vmovdqa %ymm4, -32(%rsp)
vmovd %ecx, %xmm4
shrl $7, %eax
vpshufd $0, %xmm4, %xmm4
addl %r8d, %eax
vmovaps %xmm4, -32(%rsp)
vpmovzxbw -32(%rsp), %ymm2
vmovd %eax, %xmm0
vpbroadcastb %xmm0, %xmm0
vpsllw $8, %ymm2, %ymm2
vpaddw .LC1(%rip), %ymm2, %ymm2
testq %rdx, %rdx
je .L10
vpxor %xmm5, %xmm5, %xmm5
vmovdqa .LC0(%rip), %xmm3
xorl %eax, %eax
vmovdqa %ymm5, -32(%rsp)
vmovaps %xmm0, -32(%rsp)
vpmovzxbw -32(%rsp), %ymm4
.p2align 4,,10
.p2align 3
.L7:
vmovdqu (%rsi,%rax), %xmm6
vpxor %xmm5, %xmm5, %xmm5
vmovdqa %ymm5, -32(%rsp)
vmovaps %xmm6, -32(%rsp)
vpmovzxbw -32(%rsp), %ymm0
vpmullw %ymm4, %ymm0, %ymm0
vpaddw %ymm2, %ymm0, %ymm0
vpsrlw $8, %ymm0, %ymm0
vmovdqa %xmm0, %xmm1
vextracti128 $0x1, %ymm0, %xmm0
vpand %xmm1, %xmm3, %xmm1
vpand %xmm0, %xmm3, %xmm0
vpackuswb %xmm0, %xmm1, %xmm0
vmovups %xmm0, (%rdi,%rax)
addq $16, %rax
subq $4, %rdx
jne .L7
.L10:
vzeroupper
leave
.cfi_def_cfa 7, 8
ret
.cfi_endproc
.LFE2:
.size f, .-f
where the stack spills still look bad - shomehow we don't like
_60 = BIT_INSERT_EXPR <{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, _4, 0>;
_61 = [vec_unpack_lo_expr] _60;
which is "widening" _4 to double vector size when we know we'll just need
the lowpart for the VEC_UNPACK_LO_EXPR. This _should_ translate to
a mov %xmm, %ymm but somehow it doesn't.
A small testcase for that is the zxt() function in the reduced testcase.
Using an undef SSA name in place off the { 0, ... } vector doesn't help
either. A simple VIEW_CONVERT isn't valid (it changes size).
>From gcc-bugs-return-661568-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 14:59:54 2019
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Subject: [Bug tree-optimization/92690] [10 Regression] vector CTOR optimization performs invalid conversion
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-661567-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 14:59:36 2019
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Subject: [Bug tree-optimization/92645] Hand written vector code is 450 times slower when compiled with GCC compared to Clang
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----------------------------------------------------------------------------
Status|NEW |ASSIGNED
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--- Comment #14 from Richard Biener <rguenth at gcc dot gnu.org> ---
Created attachment 47378
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47378&action=edit
patch
Patch I was playing with.
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Subject: [Bug rtl-optimization/90007] [9/10 Regression] ICE in extract_constrain_insn_cached, at recog.c:2223
Date: Wed, 27 Nov 2019 15:06:00 -0000
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--- Comment #13 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Does that work? You cannot put all hard registers in memory I think?
Or do we require that and it is just not documented?
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Subject: [Bug c++/88395] ICE: Segmentation fault signal terminated program cc1plus, with -std=c++2a -fconcepts
Date: Wed, 27 Nov 2019 15:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88395
--- Comment #12 from asutton at gcc dot gnu.org ---
Author: asutton
Date: Wed Nov 27 15:09:22 2019
New Revision: 278773
URL: https://gcc.gnu.org/viewcvs?rev=278773&root=gcc&view=rev
Log:
2019-11-27 Andrew Sutton <asutton@lock3software.com>
PR c++/88395
Prevent recursive satisfaction by adding requests to the instantiation
stack.
gcc/cp/
* constraint.cc (satisfy_declaration_constraints): Push tinst levels
around satisfaction.
gcc/testsuite/
* g++.dg/cpp2a/concepts-pr88395.C: New.
* g++.dg/cpp2a/concepts-recursive-sat1.C: New.
* g++.dg/cpp2a/concepts-recursive-sat2.C: New.
* g++.dg/cpp2a/concepts-recursive-sat3.C: New.
Added:
trunk/gcc/testsuite/g++.dg/cpp2a/concepts-pr88395.C
trunk/gcc/testsuite/g++.dg/cpp2a/concepts-recursive-sat1.C
trunk/gcc/testsuite/g++.dg/cpp2a/concepts-recursive-sat2.C
trunk/gcc/testsuite/g++.dg/cpp2a/concepts-recursive-sat3.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/constraint.cc
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/92439] [concepts] trunk crashes on constraint satisfaction failure
Date: Wed, 27 Nov 2019 15:17:00 -0000
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--- Comment #3 from asutton at gcc dot gnu.org ---
Author: asutton
Date: Wed Nov 27 15:16:37 2019
New Revision: 278774
URL: https://gcc.gnu.org/viewcvs?rev=278774&root=gcc&view=rev
Log:
2019-11-27 Andrew Sutton <asutton@lock3software.com>
PR c++/92439
Improve quality of diagnostics for subexpressions that need parens.
gcc/cp/
* parser.c (cp_parser_requires_clause_opt): Add a flag to indicate
when parsing a requires-clause before lambda parameters, and...
(cp_parser_lambda_declarator_opt): ... use that here ...
(cp_parser_type_parameter): ... and here ...
(cp_parser_late_return_type_opt): ... and here ...
(cp_parser_explicit_template_declaration): ... and here.
(cp_parser_diagnose_ungrouped_constraint_plain): Adjust the message
because this can apply to subexpressions that are not immediately
after a requires-clause.
(cp_parser_diagnose_ungrouped_constraint_rich): Likewise.
(primary_constraint_error): New.
(cp_parser_constraint_requires_parens): New.
(cp_parser_unary_constraint_requires_parens): New.
(cp_parser_constraint_primary_expression): Check for unary expressions
before parsing the primary expression. Also check for binary and
postfix operators after a successful parse of the primary expression.
Force a re-parse if the result would form a lower-precedence string.
(cp_parser_constraint_logical_and_expression): Propagate lambda flag;
move checks for ill-formed constraints into the constraint primary
expression.
(cp_parser_constraint_logical_or_expression): Likewise.
(cp_parser_requires_clause_expression): Propagate lambda flag.
gcc/testsuite/
* g++.dg/cpp2a/concepts-requires20.C: New.
Added:
trunk/gcc/testsuite/g++.dg/cpp2a/concepts-requires20.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/parser.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/92236] [concepts] Explain non-satisfaction in static_assert
Date: Wed, 27 Nov 2019 15:23:00 -0000
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--- Comment #7 from asutton at gcc dot gnu.org ---
Author: asutton
Date: Wed Nov 27 15:23:02 2019
New Revision: 278775
URL: https://gcc.gnu.org/viewcvs?rev=278775&root=gcc&view=rev
Log:
2019-11-27 Andrew Sutton <asutton@lock3software.com>
PR c++/92236
Defer evaluation of concept checks so that static assertions can
emit more detailed diagnostics.
gcc/cp/
* constexpr.c (cxx_eval_call_expression): Handle concept checks.
(cxx_eval_constant_expression): Diagnose misuse of function concepts
as template-id expressions. Follow the usual return path for results.
(cxx_eval_outermost_constant_expr): Avoid calling
cp_get_callee_fndecl_nofold for function concepts.
* constraint.cc (build_function_check): Fully type the concept check
so that we don't ICE in conversions.
* cp-gimplify.c (cp_genericize_r) [CALL_EXPR]: Handle concept checks.
[TEMPLATE_ID_EXPR] Likewise.
* cvt.c (convert_to_void): Always evaluate concept checks so we don't
accidentally ignore them. Substitution during satisfaction can make
a program ill-formed (example in g++.dg/cpp2a/concepts6.C).
* pt.c (tsubst_copy_and_build): [CALL_EXPR]: Don't evaluate concepts.
[TEMPLATE_ID_EXPR]: Likewise.
* semantics.c (finish_call_expr): Don't evaluate concepts.
(finish_id_expression_1): Likewise.
(finish_static_assert): Preserve the original condition so we can
diagnose concept errors when a check returns false.
gcc/testsuite/
* g++.dg/cpp2a/concepts-iconv1.C: Update diagnostics.
* g++.dg/cpp2a/concepts-requires5.C: Likewise.
* g++.dg/cpp2a/concepts6.C: New test.
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/constexpr.c
trunk/gcc/cp/constraint.cc
trunk/gcc/cp/cp-gimplify.c
trunk/gcc/cp/cvt.c
trunk/gcc/cp/pt.c
trunk/gcc/cp/semantics.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/g++.dg/cpp2a/concepts-iconv1.C
trunk/gcc/testsuite/g++.dg/cpp2a/concepts-requires5.C
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Subject: [Bug preprocessor/92696] #pragma GCC diagnostic ... interferes with if/else
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Last reconfirmed| |2019-11-27
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Diagnostic pragmas only work reliably at namespace-scope, not within functions.
I thought that was documented, but maybe it's just something I learnt the hard
way.
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Subject: [Bug c++/92695] P1064R0 - virtual constexpr fails if object taken from array
Date: Wed, 27 Nov 2019 15:41:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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| |mpolacek at gcc dot gnu.org
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Doesn't have to be an array,
struct A {
constexpr virtual int get () = 0;
constexpr virtual int set (A *o) = 0;
};
struct B : A {
constexpr int get () override { return 10; }
constexpr int set (A *o) override { a = o; return 20; }
A *a{};
};
constexpr auto addressof = [] (A &n) { return &n; };
struct Foo {
B b;
A *c { addressof (b) };
constexpr int add () { return c->set (addressof (b)); }
};
constexpr int get () { Foo f; return f.add (); }
constexpr auto a = get ();
static_assert (a == 20);
is rejected too.
I think the problem is that the r264408 testcase coverage doesn't try to
dereference this arguments of the virtual methods, which is what happens in
this testcase (the store to this->a in B::set(A *)).
The OBJ_TYPE_REF handling in cxx_eval_constant_expression has:
obj = TREE_OPERAND (obj, 0);
while (TREE_CODE (obj) == COMPONENT_REF
&& DECL_FIELD_IS_BASE (TREE_OPERAND (obj, 1)))
obj = TREE_OPERAND (obj, 0);
but something similar isn't done in cxx_eval_indirect_ref and I think generally
shouldn't be done there, it is (is it?) only the special case of virtual
method's first argument. So, I'd say this DECL_FIELD_IS_BASE handling should
be done in cxx_eval_call_expression.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/92510] [10 Regression] ICE in native_encode_rtx, at simplify-rtx.c:6272
Date: Wed, 27 Nov 2019 15:43:00 -0000
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--- Comment #5 from Segher Boessenkool <segher at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #4)
> Sure, before that we would punt much earlier at simplification of the
> non-sensical subreg.
We probably should again then?
> I don't mind if simplify_subreg doesn't call native_encode_rtx in the cases
> where it ICEs and instead fails.
I don't think native_encode_rtx (or simplify_immed_subreg) should ICE for
any valid input. This is valid input, for this API.
> But, I believe what gen_lowpart_for_combine does for comparisons is
> completely wrong for non-scalar modes that are different from their previous
> mode.
> A same sized subreg of something is reinterpretation of the bits of
No. A subreg of "something" is just invalid RTL. But this isn't about
subregs, it's about lowpart, and I don't see how it is wrong there?
> something as something else, VIEW_CONVERT_EXPR or type punning through union.
> Changing the mode of a comparison isn't like that.
> Consider:
> typedef char __v8qi __attribute__((vector_size (8)));
>
> void
> foo (int x, __v8qi *y)
> {
> union U { __v8qi v; unsigned long long l; } u;
> u.l = x > 36;
> *y = *y + u.v;
> }
> on x86_64-linux, I see (subreg:V8QI (gt:DI (reg:CCGC 17 flags) (const_int 0
> [0])) 0) in the dumps
Which is invalid RTL.
> but for some reason gen_lowpart_for_combine actually
> hasn't been called except to convert originally gt:QI to gt:DI (that is
> correct). If it would be called, it would turn it into a completely bogus
> (gt:V8QI (reg:CCGC 17 flags) (const_int 0 [0])), which isn't clear what it
> actually would mean.
> (gt:V8QI (reg:V8QI ...) (reg:V8QI ...)) performs 8 comparisons and fills in
> the resulting vector with 8 0/-1 values, similarly (gt:V8QI (reg:V8QI ...)
> (const_vector:V8QI ...)). But if both operands of the comparison are scalar
> and result is a vector, what it is?
Ah sure, we should not change the mode to something not MODE_INT. Your
patch is okay, thanks; but there is more wrong here :-/
>From gcc-bugs-return-661575-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 15:43:33 2019
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Subject: [Bug c++/92695] P1064R0 - virtual constexpr fails if object taken from array
Date: Wed, 27 Nov 2019 15:43:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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>From gcc-bugs-return-661577-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 15:52:34 2019
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Subject: [Bug target/92190] [10 Regression] ICE in sp_valid_at, at config/i386/i386.c:6162 since r276648
Date: Wed, 27 Nov 2019 15:52:00 -0000
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Liu Hao <lh_mouse at 126 dot com> changed:
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--- Comment #7 from Liu Hao <lh_mouse at 126 dot com> ---
MSDN says 'the upper portions of YMM0-15 and ZMM0-15 are considered volatile
and must be considered destroyed on function calls' explicitly [1].
I am not clear about the cause of OP's ICE, but I think it should conform to
MSABI to emit VZEROUPPER in the epilog, followed by restoring XMM6 - XMM15,
destroying their upper halves. Similar with the prolog.
[1]
https://docs.microsoft.com/en-us/cpp/build/x64-calling-convention?view=vs-2019#callercallee-saved-registers
>From gcc-bugs-return-661578-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 15:57:01 2019
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Subject: [Bug c++/92695] P1064R0 - virtual constexpr fails if object taken from array
Date: Wed, 27 Nov 2019 15:57:00 -0000
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
To be precise, I meant something like:
--- gcc/cp/constexpr.c.jj 2019-11-27 10:03:37.916867165 +0100
+++ gcc/cp/constexpr.c 2019-11-27 16:55:17.475150697 +0100
@@ -1441,6 +1441,22 @@ cxx_bind_parameters_in_call (const const
arg = adjust_temp_type (type, arg);
if (!TREE_CONSTANT (arg))
*non_constant_args = true;
+ if (i == 0
+ && DECL_VIRTUAL_P (fun))
+ {
+ tree addr = arg;
+ STRIP_NOPS (addr);
+ if (TREE_CODE (addr) == ADDR_EXPR)
+ {
+ tree obj = TREE_OPERAND (addr, 0);
+ while (TREE_CODE (obj) == COMPONENT_REF
+ && DECL_FIELD_IS_BASE (TREE_OPERAND (obj, 1)))
+ obj = TREE_OPERAND (obj, 0);
+ if (obj != TREE_OPERAND (addr, 0))
+ arg = build_fold_addr_expr_with_type (obj,
+ TREE_TYPE (arg));
+ }
+ }
TREE_VEC_ELT (binds, i) = arg;
}
parms = TREE_CHAIN (parms);
This fixes the testcase. Note, there is still a weird warning:
pr92695.C:3:25: warning: inline function ‘virtual constexpr int A::set(A*)’
used but never defined
3 | constexpr virtual int set (A *o) = 0;
| ^~~
>From gcc-bugs-return-661579-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 16:14:40 2019
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Subject: [Bug rtl-optimization/92591] ICE in optimize_sc, at modulo-sched.c:1063
Date: Wed, 27 Nov 2019 16:14:00 -0000
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Roman Zhuykov <zhroma at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Last reconfirmed| |2019-11-27
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--- Comment #1 from Roman Zhuykov <zhroma at gcc dot gnu.org> ---
Oops, it seems that non-zero sms-dfa-history is untested since modulo-sched was
added in 2004.
This bugs is latent since r177235 in 2011, and logic is similar to bug 84032
comment #4.
When we schedule some insn into row R we check that DFA can't see any conflicts
in rows R-H .. R+H (modulo II), where H=sms-dfa-history. So, when we schedule
branch into row R some of its neighbours were not yet scheduled and DFA tells
OK.
While scheduling neighbours DFA may check some nearby rows, for example, rows
[R+1-H .. R+1+H] or something like that, but not exactly [R-H .. R+H]. Later
we decide to temporarily remove branch insn from schedule and are pretty sure
we could put it back (if rescheduling to another row fails). And this time DFA
shows a conflict, because now all branch neighbours are scheduled already.
Attached untested patch fixes this by running extra DFA checks for all rows
[x-H..x+H] where X is any value in range [R-H,R+H], thus eliminating the issue.
Certainly, these checks are expensive enough, so I also prepated a patch about
modulo-sched params, which will set max sms-dfa-history value to 16. While at
it, the patch also fixes other issues about sms parameters.
>From gcc-bugs-return-661580-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 16:16:03 2019
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Subject: [Bug rtl-optimization/92591] ICE in optimize_sc, at modulo-sched.c:1063
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--- Comment #2 from Roman Zhuykov <zhroma at gcc dot gnu.org> ---
Created attachment 47379
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Proposed patch
>From gcc-bugs-return-661581-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 16:17:24 2019
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Subject: [Bug rtl-optimization/92591] ICE in optimize_sc, at modulo-sched.c:1063
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--- Comment #3 from Roman Zhuykov <zhroma at gcc dot gnu.org> ---
Created attachment 47380
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Parameters patch
>From gcc-bugs-return-661582-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 16:21:55 2019
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From: "jamborm at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/92697] New: IPA-SRA modifies ifunc_resolvers
Date: Wed, 27 Nov 2019 16:21:00 -0000
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Bug ID: 92697
Summary: IPA-SRA modifies ifunc_resolvers
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: ipa
Assignee: jamborm at gcc dot gnu.org
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Created attachment 47381
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47381&action=edit
testcase
In the attached testcase, IPA-SRA thinks that an ifunc resolver
(meanwhile IPA-split into two functions) function can be changed and
so goes ahead. The cgraph machinery then however throws away the new
clone of the caller instead of the "old" caller and inliner inlines
the clone of the ".part" function into the original resolver, which
results into an interesting miscompilation because IPA-SRA counted on
that both the caller and the callee are modified.
In any event, changing the signature of an ifunc resolver must not be
done.
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Subject: [Bug tree-optimization/90264] [9/10 Regression] -Wnull-dereference QoI issue
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--- Comment #6 from Roman Zhuykov <zhroma at gcc dot gnu.org> ---
Ok, this seems quite clear from compiler developer point of view.
But I still want to add, that for compiler user, who knows how asprintf
function works, "Line A" version is correct and warning seems unnecessary.
While "Line B" version where user forget about bail-out is compiled smoothly.
>From gcc-bugs-return-661584-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 16:32:34 2019
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Subject: [Bug tree-optimization/90264] [9/10 Regression] -Wnull-dereference QoI issue
Date: Wed, 27 Nov 2019 16:32:00 -0000
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--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Either the function guarantees that *seq will be always non-NULL (at least if
the call doesn't return negative), but then there is no point in using out &&
*out, you can as well just use *out, because out will never be NULL. Or the
function doesn't guarantee it and if it is NULL, the code will crash.
>From gcc-bugs-return-661585-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 16:33:30 2019
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Subject: [Bug rtl-optimization/92510] [10 Regression] ICE in native_encode_rtx, at simplify-rtx.c:6272
Date: Wed, 27 Nov 2019 16:33:00 -0000
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Nov 27 16:32:54 2019
New Revision: 278777
URL: https://gcc.gnu.org/viewcvs?rev=278777&root=gcc&view=rev
Log:
PR rtl-optimization/92510
* combine.c (gen_lowpart_for_combine): Only transform lowpart subreg
of comparison into a comparison with different mode if both imode and
omode are scalar integral modes.
* gcc.dg/pr92510.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/pr92510.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/combine.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-661586-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 16:42:56 2019
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Subject: [Bug rtl-optimization/92510] [10 Regression] ICE in native_encode_rtx, at simplify-rtx.c:6272
Date: Wed, 27 Nov 2019 16:42:00 -0000
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--- Comment #7 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
(In reply to Segher Boessenkool from comment #5)
> (In reply to Jakub Jelinek from comment #4)
> > I don't mind if simplify_subreg doesn't call native_encode_rtx in the cases
> > where it ICEs and instead fails.
>
> I don't think native_encode_rtx (or simplify_immed_subreg) should ICE for
> any valid input. This is valid input, for this API.
As Jakub mentioned in comment 1, the native_encode_rtx ICE is coming
from the call:
simplify_subreg (DImode, const1_rtx, V1DImode, 0)
// (outermode, op, innermode, byte)
i.e. the caller is claiming that the inner const1_rtx has mode V1DI.
And that can't be true, because vector constants have to be const_vectors
rather than const_ints. (The combination of outermode, innermode and op
are fine of course. The problem is "just" that the given innermode
doesn't match the inner rtx.)
So IMO the ICE is justified and we shouldn't change change simplify_subreg
to handle cases in which innermode doesn't tally with op/GET_MODE (op).
>From gcc-bugs-return-661587-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 16:46:46 2019
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Subject: [Bug rtl-optimization/92510] [10 Regression] ICE in native_encode_rtx, at simplify-rtx.c:6272
Date: Wed, 27 Nov 2019 16:46:00 -0000
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--- Comment #8 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
(In reply to rsandifo@gcc.gnu.org from comment #7)
> As Jakub mentioned in comment 1, the native_encode_rtx ICE is coming
> from the call:
>
> simplify_subreg (DImode, const1_rtx, V1DImode, 0)
> // (outermode, op, innermode, byte)
>
> i.e. the caller is claiming that the inner const1_rtx has mode V1DI.
> And that can't be true, because vector constants have to be const_vectors
> rather than const_ints. (The combination of outermode, innermode and op
I meant "byte" rather than "op" :-)
> are fine of course. The problem is "just" that the given innermode
> doesn't match the inner rtx.)
>From gcc-bugs-return-661588-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 17:06:11 2019
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Subject: [Bug c++/92695] P1064R0 - virtual constexpr fails if object taken from array
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|mpolacek at gcc dot gnu.org |jakub at gcc dot gnu.org
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 47382
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47382&action=edit
gcc10-pr92695.patch
Untested fix.
>From gcc-bugs-return-661589-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 17:12:24 2019
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Subject: [Bug preprocessor/92696] #pragma GCC diagnostic ... interferes with if/else
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--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Also #pragma are considered statements. There is another issue like this but
instead using _Pragma .
>From gcc-bugs-return-661590-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 17:15:41 2019
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Subject: [Bug target/92693] Inconsistency between __UINTPTR_TYPE__ and __UINT32_TYPE__ on ARM
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Or just use the foundalmential types instead. And then layer above them.
>From gcc-bugs-return-661591-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 17:23:53 2019
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Subject: [Bug rtl-optimization/92283] [10 Regression] 454.calculix miscomparison since r276645 with -O2 -march=znver2
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--- Comment #25 from rguenther at suse dot de <rguenther at suse dot de> ---
On November 27, 2019 2:36:38 PM GMT+01:00, "vmakarov at gcc dot gnu.org"
<gcc-bugzilla@gcc.gnu.org> wrote:
>https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92283
>
>--- Comment #24 from Vladimir Makarov <vmakarov at gcc dot gnu.org> ---
>(In reply to Richard Biener from comment #23)
>> Vladimir, can you look into this LRA inheritance issue?
>
>Yes, I've started to work on this. I can not reproduce it on the
>current
>trunk. But yesterday, I've reproduced it on the revision mentioned in
>the
>title.
>
>Inheritance problems are usually hard to fix. So I can not say when I
>find a
>reason for the problem and solution for it. But I guess it will be
>fixed on
>the next week
Heh, no problem. It took me a week to nail down the actual issue as well...
>From gcc-bugs-return-661592-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 17:33:07 2019
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/92695] P1064R0 - virtual constexpr fails if object taken from array
Date: Wed, 27 Nov 2019 17:33:00 -0000
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 47383
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47383&action=edit
gcc10-pr92695.patch
And here is a fix for the bogus warning. inline or constexpr on pure virtual
functions looks useless, but the standard doesn't disallow that it seems.
>From gcc-bugs-return-661593-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 17:38:12 2019
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Subject: =?UTF-8?B?W0J1ZyB0YXJnZXQvOTI2OTRdIENhbid0IGJ1aWxkIHBvd2VycGMtZWFiaSBj?= =?UTF-8?B?cm9zcyBjb21waWxlcjogPGJ1aWx0LWluPjogZmF0YWwgZXJyb3I6IGludGVy?= =?UTF-8?B?bmFsIGVycm9yOiBidWlsdGluIGZ1bmN0aW9uIOKAmF9fYnVpbHRpbl9kZGVk?= =?UTF-8?B?cGTigJkgaGFkIGFuIHVuZXhwZWN0ZWQgcmV0dXJuIHR5cGUg4oCYRETigJk=?Date: Wed, 27 Nov 2019 17:38:00 -0000
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Joseph S. Myers <jsm28 at gcc dot gnu.org> changed:
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--- Comment #1 from Joseph S. Myers <jsm28 at gcc dot gnu.org> ---
Duplicate.
*** This bug has been marked as a duplicate of bug 92661 ***
>From gcc-bugs-return-661594-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 17:38:13 2019
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Subject: [Bug bootstrap/92661] [10 Regression] Bootstrap failure with builtin-types.def change
Date: Wed, 27 Nov 2019 17:38:00 -0000
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Joseph S. Myers <jsm28 at gcc dot gnu.org> changed:
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CC| |green at redhat dot com
--- Comment #7 from Joseph S. Myers <jsm28 at gcc dot gnu.org> ---
*** Bug 92694 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-661595-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 17:41:10 2019
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Subject: [Bug lto/91273] [8/9/10 Regression] ICE in warn_types_mismatch at ipa-devirt.c:995
Date: Wed, 27 Nov 2019 17:41:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
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--- Comment #11 from Martin Liška <marxin at gcc dot gnu.org> ---
Dup.
*** This bug has been marked as a duplicate of bug 91222 ***
>From gcc-bugs-return-661596-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 17:41:11 2019
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Subject: [Bug c++/91222] [10 Regression] 507.cactuBSSN_r build fails in warn_types_mismatch at ipa-devirt.c:1006 since r273571
Date: Wed, 27 Nov 2019 17:41:00 -0000
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--- Comment #30 from Martin Liška <marxin at gcc dot gnu.org> ---
*** Bug 91273 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-661597-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 18:00:50 2019
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From: "jamborm at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug ipa/92697] IPA-SRA modifies ifunc_resolvers
Date: Wed, 27 Nov 2019 18:00:00 -0000
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--- Comment #1 from Martin Jambor <jamborm at gcc dot gnu.org> ---
And for the record, I'm testing a patch.
>From gcc-bugs-return-661598-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 18:14:34 2019
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From: "rsandifo at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/92596] [10 Regression] ICE in exact_div, at poly-int.h:2162 since r278406
Date: Wed, 27 Nov 2019 18:14:00 -0000
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--- Comment #10 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
Since it's been a while since the last update: I've been trying
various non-invasive ways of fixing it, but even if they seem to be
strict improvements, they still leave open obvious traps of a similar
nature for later.
I think we'll just have to get rid of the special deferred handling
of boolean_type_node and stop computing so much of this stuff on
the fly. I'm now testing a series of patches to do that.
>From gcc-bugs-return-661599-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 18:23:19 2019
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/92692] [9/10 Regression] Saving off the callee saved register between ldxr/stxr (caused by shrink wrapping improvements)
Date: Wed, 27 Nov 2019 18:23:00 -0000
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
>it turns out the issue is a gcc issue and a glibc issue.
NOTE I had missed out a word here:
This should have read:
it turns out the issue is a gcc issue and NOT a glibc issue.
>From gcc-bugs-return-661600-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 18:24:50 2019
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug preprocessor/92696] #pragma GCC diagnostic ... interferes with if/else
Date: Wed, 27 Nov 2019 18:24:00 -0000
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--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #2)
> Also #pragma are considered statements. There is another issue like this
> but instead using _Pragma .
I should say some Pragmas are considered statements.
See PR 90400 Which shows the similar issue but with _Pragma. In this case,
these Pragmas are considered statements.
>From gcc-bugs-return-661601-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 18:29:18 2019
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From: "mjr19 at cam dot ac.uk" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/92698] New: Unnecessary copy in overlapping array assignment
Date: Wed, 27 Nov 2019 18:29:00 -0000
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Bug ID: 92698
Summary: Unnecessary copy in overlapping array assignment
Product: gcc
Version: 9.2.0
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Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
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subroutine cpy(a,src,dest,len)
integer, intent(in) :: src,dest,len
real(kind(1d0)), intent(inout) :: a(:)
a(dest:dest+len-1)=a(src:src+len-1)
end subroutine cpy
seems to compile to malloc tmp array, inline copy to tmp, inline copy from tmp,
free tmp in gfortran 7.4 and 8.3. Gfortran 9.2 modifies this by replacing the
inline copies with memcpy at -O3.
Fortran permits the source and destination to overlap, so a single call to
memcpy would be wrong. However, it is always possible to do an overlapping copy
in place either by incrementing from the start or by decrementing from the end,
as glibc's memmove does. The use of a temporary array, whilst given as an
example in the Fortran standard to illustrate that overlap is permitted, seems
in practice unnecessary. Would it not be better to call memmove once rather
than memcpy twice? Or perhaps a single inline copy, direction to be determined
by the nature of the overlap?
(Above observations from Linux / x86_64)
>From gcc-bugs-return-661602-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 18:54:28 2019
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/92692] [9/10 Regression] Saving off the callee saved register between ldxr/stxr (caused by shrink wrapping improvements)
Date: Wed, 27 Nov 2019 18:54:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |ktkachov at gcc dot gnu.org
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I think this has been a latent bug since revision 243200:
[AArch64] Separate shrink wrapping hooks implementation
I think aarch64_disqualify_components would be a location which should
disqualify the Separate for the register 19.
>From gcc-bugs-return-661603-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 20:11:51 2019
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Subject: [Bug c++/92695] P1064R0 - virtual constexpr fails if object taken from array
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--- Comment #7 from Toni Neubert <lutztonineubert at gmail dot com> ---
First of all thank you very much for your extremly fast help!
I testet the patch and it did work for my second example.
But this one still fails, if we do not use the addressof function:
struct A {
virtual int get() = 0;
};
struct B : A {
constexpr int get() override {
return 10;
}
};
struct D {
B b[2];
A* c{&(b[0])};
};
static_assert(D{}.c->get() == 10);
Error:
main.cpp:20:28: error: non-constant condition for static assertion
20 | static_assert(D{}.c->get() == 10);
| ~~~~~~~~~~~~~^~~~~
main.cpp:20:28: error: expression 'A::get' is not a constant expression
>From gcc-bugs-return-661604-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 20:31:12 2019
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Subject: [Bug target/92190] [10 Regression] ICE in sp_valid_at, at config/i386/i386.c:6162 since r276648
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--- Comment #8 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Liu Hao from comment #7)
> MSDN says 'the upper portions of YMM0-15 and ZMM0-15 are considered volatile
> and must be considered destroyed on function calls' explicitly [1].
>
> I am not clear about the cause of OP's ICE, but I think it should conform to
> MSABI to emit VZEROUPPER in the epilog, followed by restoring XMM6 - XMM15,
> destroying their upper halves. Similar with the prolog.
The insertion of vzeroupper is not "invisible" to stack frame management code
any more, since vzeroupper is now defined as:
(insn 738 619 434 2 (parallel [
(unspec_volatile [
(const_int 0 [0])
] UNSPECV_VZEROUPPER)
(clobber (reg:V2DI 20 xmm0))
(clobber (reg:V2DI 21 xmm1))
(clobber (reg:V2DI 22 xmm2))
(clobber (reg:V2DI 23 xmm3))
(clobber (reg:V2DI 24 xmm4))
(clobber (reg:V2DI 25 xmm5))
(set (reg:V2DI 26 xmm6)
(reg:V2DI 26 xmm6))
(clobber (reg:V2DI 27 xmm7))
(clobber (reg:V2DI 44 xmm8))
(clobber (reg:V2DI 45 xmm9))
(clobber (reg:V2DI 46 xmm10))
(clobber (reg:V2DI 47 xmm11))
(clobber (reg:V2DI 48 xmm12))
(clobber (reg:V2DI 49 xmm13))
(clobber (reg:V2DI 50 xmm14))
(clobber (reg:V2DI 51 xmm15))
]) "pr92190.c":8:3 -1
(nil))
. The insertion point of vzeroupper pass is just after reload pass, and now all
xmm registers (xmm0 - xmm15) become live. This is not a problem in SYSV ABI,
where all registers are call_used, but in MS ABI, the prologue now tries to
save xmm6 - xmm15 to the stack.
So, vzeroupper should be described in a way that won't trigger saves of xmm6 -
xmm15 to the stack, while still mark that high part of the register is
clobbered.
An alternative would be to consider the mode of call_used register and save
only wide (> 128bits) registers in the caller. I'm not sure if the current
implementation already clobbers the high part of the 256bit register.
>From gcc-bugs-return-661605-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 20:34:58 2019
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Subject: [Bug bootstrap/92661] [10 Regression] Bootstrap failure with builtin-types.def change
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|unassigned at gcc dot gnu.org |bergner at gcc dot gnu.org
--- Comment #8 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Assigning this to Peter.
>From gcc-bugs-return-661606-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 20:47:29 2019
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From: "brechtsanders at users dot sourceforge.net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/92699] New: Slash should be removed from C/C++ plugin install destination
Date: Wed, 27 Nov 2019 20:47:00 -0000
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Bug ID: 92699
Summary: Slash should be removed from C/C++ plugin install
destination
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I was trying to GCC with the --enable-plugin parameter on Windows with
MinGW-w64.
There was an error in the installation which I was able to solve by fixing
gcc/c/Make-lang.in and gcc/cp/Make-lang.in with this command:
sed -i.bak -e "s?\(\$(DESTDIR)\)/\(\$(plugin_resourcesdir)\)?\1\2?"
gcc/c/Make-lang.in gcc/cp/Make-lang.in
Basically the slash in $(DESTDIR)/$(plugin_resourcesdir) should be removed, so
this reads as $(DESTDIR)$(plugin_resourcesdir), which is how it was done in the
line above it that makes the directory if needed.
Otherwise the path starts with 2 slashes, which on Windows would make it a UNC
path instead of a local path. I can image this probably worked on almost any
other OS.
>From gcc-bugs-return-661607-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 20:50:17 2019
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Subject: [Bug target/92190] [10 Regression] ICE in sp_valid_at, at config/i386/i386.c:6162 since r276648
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--- Comment #9 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Liu Hao from comment #7)
> MSDN says 'the upper portions of YMM0-15 and ZMM0-15 are considered volatile
> and must be considered destroyed on function calls' explicitly [1].
BTW: MSDN is clear that xMM16-31 are volatile (call_used), so the current
definition of CALL_USER_REGISTERS is wrong. At least this part should be:
Index: i386.h
===================================================================
--- i386.h (revision 278455)
+++ i386.h (working copy)
@@ -1126,9 +1126,9 @@
/*xmm8,xmm9,xmm10,xmm11,xmm12,xmm13,xmm14,xmm15*/ \
6, 6, 6, 6, 6, 6, 6, 6, \
/*xmm16,xmm17,xmm18,xmm19,xmm20,xmm21,xmm22,xmm23*/ \
- 6, 6, 6, 6, 6, 6, 6, 6, \
+ 1, 1, 1, 1, 1, 1, 1, 1, \
/*xmm24,xmm25,xmm26,xmm27,xmm28,xmm29,xmm30,xmm31*/ \
- 6, 6, 6, 6, 6, 6, 6, 6, \
+ 1, 1, 1, 1, 1, 1, 1, 1, \
/* k0, k1, k2, k3, k4, k5, k6, k7*/ \
1, 1, 1, 1, 1, 1, 1, 1 }
>From gcc-bugs-return-661608-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 20:56:32 2019
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--- Comment #9 from Peter Bergner <bergner at gcc dot gnu.org> ---
Author: bergner
Date: Wed Nov 27 20:55:56 2019
New Revision: 278783
URL: https://gcc.gnu.org/viewcvs?rev=278783&root=gcc&view=rev
Log:
Do not define DFP builtin functions, if DFP has been disabled.
PR bootstrap/92661
* config/rs6000/rs6000-call.c: (def_builtin): Do not define the
builtin if we don't have an actual type.
(builtin_function_type): If the builtin function uses a DFP type
and decimal float has been disabled, then return NULL_TREE.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/rs6000/rs6000-call.c
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Subject: [Bug target/92190] [10 Regression] ICE in sp_valid_at, at config/i386/i386.c:6162 since r276648
Date: Wed, 27 Nov 2019 21:03:00 -0000
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--- Comment #10 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
(In reply to Uroš Bizjak from comment #8)
> (In reply to Liu Hao from comment #7)
> > MSDN says 'the upper portions of YMM0-15 and ZMM0-15 are considered volatile
> > and must be considered destroyed on function calls' explicitly [1].
> >
> > I am not clear about the cause of OP's ICE, but I think it should conform to
> > MSABI to emit VZEROUPPER in the epilog, followed by restoring XMM6 - XMM15,
> > destroying their upper halves. Similar with the prolog.
>
> The insertion of vzeroupper is not "invisible" to stack frame management
> code any more, since vzeroupper is now defined as:
>
> (insn 738 619 434 2 (parallel [
> (unspec_volatile [
> (const_int 0 [0])
> ] UNSPECV_VZEROUPPER)
> (clobber (reg:V2DI 20 xmm0))
> (clobber (reg:V2DI 21 xmm1))
> (clobber (reg:V2DI 22 xmm2))
> (clobber (reg:V2DI 23 xmm3))
> (clobber (reg:V2DI 24 xmm4))
> (clobber (reg:V2DI 25 xmm5))
> (set (reg:V2DI 26 xmm6)
> (reg:V2DI 26 xmm6))
> (clobber (reg:V2DI 27 xmm7))
> (clobber (reg:V2DI 44 xmm8))
> (clobber (reg:V2DI 45 xmm9))
> (clobber (reg:V2DI 46 xmm10))
> (clobber (reg:V2DI 47 xmm11))
> (clobber (reg:V2DI 48 xmm12))
> (clobber (reg:V2DI 49 xmm13))
> (clobber (reg:V2DI 50 xmm14))
> (clobber (reg:V2DI 51 xmm15))
> ]) "pr92190.c":8:3 -1
> (nil))
>
>
> . The insertion point of vzeroupper pass is just after reload pass, and now
> all xmm registers (xmm0 - xmm15) become live. This is not a problem in SYSV
> ABI, where all registers are call_used, but in MS ABI, the prologue now
> tries to save xmm6 - xmm15 to the stack.
>
> So, vzeroupper should be described in a way that won't trigger saves of xmm6
> - xmm15 to the stack, while still mark that high part of the register is
> clobbered.
Ah, OK. It should be safe to leave out a clobber if
!df_regs_ever_live_p and if we're guaranteed not to introduce
new references to the register later.
>From gcc-bugs-return-661610-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 21:09:08 2019
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From: "f.heckenbach@fh-soft.de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/92700] New: wrong "unintialized" warning with std::optional
Date: Wed, 27 Nov 2019 21:09:00 -0000
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Bug ID: 92700
Summary: wrong "unintialized" warning with std::optional
Product: gcc
Version: 9.1.0
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#include <optional>
#include <string>
int e;
template <typename T> std::optional <size_t> f ()
{
if (auto i = std::string ().find ('a'))
return i;
return { };
}
int main ()
{
size_t j = 1;
while (j)
{
auto i = f <int> ();
if (e != 1 && e != 4 && e != 7)
throw 0;
if (i)
j = *i;
}
}
% g++-9 --version
g++-9 (GCC) 9.1.0
% g++-9 --std=c++17 test.cpp -Wall -O3
test.cpp: In function 'int main()':
test.cpp:10:12: warning: '<anonymous>' may be used uninitialized in this
function [-Wmaybe-uninitialized]
This may be a duplicate, but I can't really tell since this warning seems to
depend on many seemingly unrelated conditions, e.g. f must be a template,
std::string::find seems required (at least a simple external function won't
do),
the seemingly unrelated test of e is required (and must contain at least
3 clauses with specific values -- 1, 2, 3 won't do).
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Subject: [Bug c++/92695] P1064R0 - virtual constexpr fails if object taken from array
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--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 47384
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47384&action=edit
gcc10-pr92695-3.patch
That is another bug.
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Subject: [Bug c++/92695] P1064R0 - virtual constexpr fails if object taken from array
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #47383|0 |1
is obsolete| |
--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 47385
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gcc10-pr92695-2.patch
Oops, the second patch I've attached was the same as the first one, instead of
this one.
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Subject: [Bug c++/92411] conformance issue with reinterpret_cast in constant expressions
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--- Comment #1 from Darrell Wright <Darrell.Wright at gmail dot com> ---
sorry, posted incorrect CE link, but code below demonstrates it
>From gcc-bugs-return-661614-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 21:37:33 2019
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Subject: [Bug bootstrap/92661] [10 Regression] Bootstrap failure with builtin-types.def change
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Peter Bergner <bergner at gcc dot gnu.org> changed:
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--- Comment #10 from Peter Bergner <bergner at gcc dot gnu.org> ---
The commit above fixes the bootstrap issue. However, we still have an issue
with the testsuite test case dtstsfi-0.c. That test case calls a builtin
function that overloads one of the DFP builtins we skipped defining with per
this commit. The current code uses standin types rather than DFP types, so we
do not recognize that DFP has been disabled.
>From gcc-bugs-return-661615-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 21:42:26 2019
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Subject: [Bug target/92692] [9/10 Regression] Saving off the callee saved register between ldxr/stxr (caused by shrink wrapping improvements)
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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 Andrew Pinski from comment #2)
> I think this has been a latent bug since revision 243200:
> [AArch64] Separate shrink wrapping hooks implementation
>
> I think aarch64_disqualify_components would be a location which should
> disqualify the Separate for the register 19.
What is the "exclusives reservation granule" size? It could only fail if the
granule is large and the spill happens to be in the same granule as the stxr.
I guess it's easy to fix by delaying the expansion or inserting a clobber of
x19 before the loop starts.
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Subject: [Bug target/92692] [9/10 Regression] Saving off the callee saved register between ldxr/stxr (caused by shrink wrapping improvements)
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--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Wilco from comment #3)
> (In reply to Andrew Pinski from comment #2)
> > I think this has been a latent bug since revision 243200:
> > [AArch64] Separate shrink wrapping hooks implementation
> >
> > I think aarch64_disqualify_components would be a location which should
> > disqualify the Separate for the register 19.
>
> What is the "exclusives reservation granule" size? It could only fail if the
> granule is large and the spill happens to be in the same granule as the stxr.
NO "exclusives reservation granule" does not matter here, please read the ARMv8
spec again copied below (B2-142):
LoadExcl/StoreExcl loops are guaranteed to make forward progress only if, for
any LoadExcl/StoreExcl loop
within a single thread of execution, the software meets all of the following
conditions:
1 Between the Load-Exclusive and the Store-Exclusive, there are ****no explicit
memory accesses****,
preloads, direct or indirect System register writes, address translation
instructions, cache or TLB
maintenance instructions, exception generating instructions, exception returns,
or indirect branches.
--- CUT ----
****no explicit memory accesses****
Is a requirement so it does not matter what "exclusives reservation granule"
size is really.
We had gone through this beforehand with the ARM architectures and made sure
that the specifications was worded correctly to the above effect. The wording
change happened in 2016.
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Subject: [Bug c++/92206] [10 Regression] ICE in strip_typedefs, at cp/tree.c:1682 since r277281
Date: Wed, 27 Nov 2019 22:06:00 -0000
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--- Comment #12 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Wed Nov 27 22:05:41 2019
New Revision: 278784
URL: https://gcc.gnu.org/viewcvs?rev=278784&root=gcc&view=rev
Log:
PR c++/92206 - ICE with typedef to dependent alias.
rsandifo's patch for 92206 demonstrated a problem with the existing checking
for alias template specializations: they were returning false for a typedef
to an alias template specialization. Which is sometimes what the caller
wants, and sometimes not: Sometimes we're interested in whether the type was
written as an alias template-id, and sometimes whether it represents one.
The testcase illustrates a case that remained wrong with the earlier patch:
if the typedef is itself an alias template specialization, we can't strip an
underlying dependent alias.
* pt.c (dependent_alias_template_spec_p)
(alias_template_specialization_p): Add transparent_typedefs
parameter.
(iterative_hash_template_arg, any_template_parm_r)
(primary_template_specialization_p, tsubst, dependent_type_p_r):
Adjust.
* decl.c (check_elaborated_type_specifier): Adjust.
* error.c (dump_template_bindings, dump_aggr_type): Adjust.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/alias-decl-pr92206-4.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/cp-tree.h
trunk/gcc/cp/decl.c
trunk/gcc/cp/error.c
trunk/gcc/cp/pt.c
trunk/gcc/cp/tree.c
trunk/gcc/cp/typeck.c
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Subject: [Bug fortran/92701] New: ICE assigning to assumed rank derived type component
Date: Wed, 27 Nov 2019 22:32:00 -0000
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Bug ID: 92701
Summary: ICE assigning to assumed rank derived type component
Product: gcc
Version: 10.0
Status: UNCONFIRMED
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Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
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The following code causes an ICE with gfortran 10.0 (r278783):
module a
type :: r
end type r
type, extends(r) :: rr
double precision:: d
end type rr
contains
subroutine abd(p)
implicit none
class(r), intent(inout), dimension(..) :: p
double precision, dimension(:), allocatable :: d
select rank (p)
rank (1)
select type (p)
type is (rr)
allocate(d(size(p,dim=1)))
d=0.0d0
p%d=d
end select
end select
return
end subroutine abd
end module a
$ gfortran -v
Using built-in specs.
COLLECT_GCC=gfortran
COLLECT_LTO_WRAPPER=/home/abenson/Galacticus/Tools/libexec/gcc/x86_64-pc-linux-gnu/10.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-trunk/configure --prefix=/home/abenson/Galacticus/Tools
--enable-languages=c,c++,fortran --disable-multilib : (reconfigured)
../gcc-trunk/configure --prefix=/home/abenson/Galacticus/Tools
--disable-multilib --enable-languages=c,c++,fortran,lto --no-create
--no-recursion
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 10.0.0 20191127 (experimental) (GCC)
$ gfortran -c bug.F90 -o bug.o
f951: internal compiler error: Segmentation fault
0xdd4adf crash_signal
../../gcc-trunk/gcc/toplev.c:328
0x7fa79dd101ef ???
/data001/abenson/Galacticus/Tools/glibc-2.12.1/signal/../sysdeps/unix/sysv/linux/x86_64/sigaction.c:0
0x7d41a1 gfc_check_vardef_context(gfc_expr*, bool, bool, bool, char const*)
../../gcc-trunk/gcc/fortran/expr.c:6237
0x84cff7 gfc_resolve_code(gfc_code*, gfc_namespace*)
../../gcc-trunk/gcc/fortran/resolve.c:11768
0x8508b7 resolve_codes
../../gcc-trunk/gcc/fortran/resolve.c:17180
0x83c2ce gfc_resolve(gfc_namespace*)
../../gcc-trunk/gcc/fortran/resolve.c:17215
0x83c2ce gfc_resolve(gfc_namespace*)
../../gcc-trunk/gcc/fortran/resolve.c:17194
0x84cc58 resolve_block_construct
../../gcc-trunk/gcc/fortran/resolve.c:10549
0x84cc58 gfc_resolve_code(gfc_code*, gfc_namespace*)
../../gcc-trunk/gcc/fortran/resolve.c:11899
0x84ef43 gfc_resolve_blocks(gfc_code*, gfc_namespace*)
../../gcc-trunk/gcc/fortran/resolve.c:10691
0x84fa0b resolve_select_type
../../gcc-trunk/gcc/fortran/resolve.c:9544
0x84cbe1 gfc_resolve_code(gfc_code*, gfc_namespace*)
../../gcc-trunk/gcc/fortran/resolve.c:11891
0x84ef43 gfc_resolve_blocks(gfc_code*, gfc_namespace*)
../../gcc-trunk/gcc/fortran/resolve.c:10691
0x84c3b8 gfc_resolve_code(gfc_code*, gfc_namespace*)
../../gcc-trunk/gcc/fortran/resolve.c:11654
0x8508b7 resolve_codes
../../gcc-trunk/gcc/fortran/resolve.c:17180
0x8507ee resolve_codes
../../gcc-trunk/gcc/fortran/resolve.c:17163
0x83c2ce gfc_resolve(gfc_namespace*)
../../gcc-trunk/gcc/fortran/resolve.c:17215
0x83c2ce gfc_resolve(gfc_namespace*)
../../gcc-trunk/gcc/fortran/resolve.c:17194
0x82f078 gfc_parse_file()
../../gcc-trunk/gcc/fortran/parse.c:6443
0x87f30f gfc_be_parse_file
../../gcc-trunk/gcc/fortran/f95-lang.c:210
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
The ICE seems to be triggered by the "p%d=d" assignment.
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Subject: [Bug rtl-optimization/90007] [9/10 Regression] ICE in extract_constrain_insn_cached, at recog.c:2223
Date: Wed, 27 Nov 2019 22:36:00 -0000
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--- Comment #14 from Vladimir Makarov <vmakarov at gcc dot gnu.org> ---
(In reply to Segher Boessenkool from comment #13)
> Does that work? You cannot put all hard registers in memory I think?
> Or do we require that and it is just not documented?
It depends on insns. For example, if insn only requires memory operand but we
have hard register instead, we spill it into memory.
Generally speaking I think we can "invent" an architecture where such feature
may result in problems. But the same possible for other aspects of LRA/reload
work.
In practice, I believe it is not a problem for real architectures.
>From gcc-bugs-return-661620-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 22:42:19 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/92692] [9/10 Regression] Saving off the callee saved register between ldxr/stxr (caused by shrink wrapping improvements)
Date: Wed, 27 Nov 2019 22:42:00 -0000
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--- Comment #5 from Wilco <wilco at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #4)
> (In reply to Wilco from comment #3)
> > (In reply to Andrew Pinski from comment #2)
> > > I think this has been a latent bug since revision 243200:
> > > [AArch64] Separate shrink wrapping hooks implementation
> > >
> > > I think aarch64_disqualify_components would be a location which should
> > > disqualify the Separate for the register 19.
> >
> > What is the "exclusives reservation granule" size? It could only fail if the
> > granule is large and the spill happens to be in the same granule as the stxr.
> NO "exclusives reservation granule" does not matter here, please read the
> ARMv8 spec again copied below (B2-142):
> LoadExcl/StoreExcl loops are guaranteed to make forward progress only if,
> for any LoadExcl/StoreExcl loop
> within a single thread of execution, the software meets all of the following
> conditions:
> 1 Between the Load-Exclusive and the Store-Exclusive, there are ****no
> explicit memory accesses****,
> preloads, direct or indirect System register writes, address translation
> instructions, cache or TLB
> maintenance instructions, exception generating instructions, exception
> returns, or indirect branches.
> --- CUT ----
>
> ****no explicit memory accesses****
> Is a requirement so it does not matter what "exclusives reservation granule"
> size is really.
> We had gone through this beforehand with the ARM architectures and made sure
> that the specifications was worded correctly to the above effect. The
> wording change happened in 2016.
Well I'm looking at the latest version
(https://static.docs.arm.com/ddi0487/ea/DDI0487E_a_armv8_arm.pdf) where in
figure B2-5 it explicitly states that a store that does not match the
reservation granule on the same CPU must not change the exclusive state.
However if a store does match the granule it is implementation defined, hence
the reason for the text you quote to guarantee forward progress - otherwise a
random store in the loop could accidentally match the exclusive granule and
block progress. However I don't see it saying anywhere that all stores must
clear the exclusive state.
>From gcc-bugs-return-661621-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 22:56:37 2019
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Subject: [Bug fortran/92701] ICE assigning to assumed rank derived type component
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Tobias Burnus <burnus at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-11-27
CC| |burnus at gcc dot gnu.org,
| |pault at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Tobias Burnus <burnus at gcc dot gnu.org> ---
No regression as 'select rank' is new.
In gfc_check_vardef_context, assoc->variable == NULL and
assoc->target == NULL [this one causes the segfault] and
assoc->st->name == "__tmp_class___class_a_R_15_0t_rank_1"
On the other hand, e->symtree->n.sym->assoc->target exists and
e->symtree->n.sym->assoc->target->symtree == assoc->st.
assoc gets set (ll. 6213–6219) as:
gfc_expr* t = sym->assoc->target;
gcc_assert (t->expr_type == EXPR_VARIABLE);
name = t->symtree->name;
if (t->symtree->n.sym->assoc)
assoc = t->symtree->n.sym->assoc;
else
assoc = sym->assoc;
That's sufficient for:
gcc_assert (name && assoc);
But then it fails when doing:
assoc->target->expr_type
(That's for !assoc->variable – but also the else branch assumes that
assoc->target != NULL.)
>From gcc-bugs-return-661622-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 27 23:07:43 2019
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Subject: [Bug target/92692] [9/10 Regression] Saving off the callee saved register between ldxr/stxr (caused by shrink wrapping improvements)
Date: Wed, 27 Nov 2019 23:07:00 -0000
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--- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Wilco from comment #5)
> Well I'm looking at the latest version
> (https://static.docs.arm.com/ddi0487/ea/DDI0487E_a_armv8_arm.pdf) where in
> figure B2-5 it explicitly states that a store that does not match the
> reservation granule on the same CPU must not change the exclusive state.
>
> However if a store does match the granule it is implementation defined,
> hence the reason for the text you quote to guarantee forward progress -
> otherwise a random store in the loop could accidentally match the exclusive
> granule and block progress. However I don't see it saying anywhere that all
> stores must clear the exclusive state.
That is for the global monitor which yes is depdenent on the granule. But the
local monitor is taken into account too and you missed that.
As mentioned in Section B2.9.2:
"For shareable memory locations, exclusive access instructions rely on:
• A local monitor for each PE in the system, that marks any address from which
the PE executes a
Load-Exclusive."
The local monitor is described in B2.9.1 and figure B2-4 which has the
following note about the local monitor state machine:
"The IMPLEMENTATION DEFINED options for the local monitor are consistent with
the local monitor being
constructed so that it does not hold any PA, but instead treats any access as
matching the address of the
previous Load-Exclusive instruction."
>From gcc-bugs-return-661623-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 01:38:02 2019
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Subject: [Bug c++/92675] sign-conversion C++ unsigned int j = -1;
Date: Thu, 28 Nov 2019 01:38:00 -0000
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--- Comment #5 from Jonny Grant <jg at jguk dot org> ---
I tried godbolt trunk again for C++ today with -Wsign-conversion and it does
give a warning. I can only think I made a mistake while checking - unless a
patch has just gone in?
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Subject: [Bug tree-optimization/92689] Improve stmt_may_clobber_ref_p_1 on constant memory reference
Date: Thu, 28 Nov 2019 02:31:00 -0000
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--- Comment #6 from Feng Xue <fxue at os dot amperecomputing.com> ---
Good case. I did missed something, a const pointer does not imply it is
restrict and for a real const data, we can even create a non-const pointer
alias to it by using explicit type cast.
>From gcc-bugs-return-661625-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 04:45:58 2019
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Subject: [Bug c/66773] sign-compare warning for == and != are pretty useless
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--- Comment #20 from Daniel Marjamäki <daniel.marjamaki at gmail dot com> ---
(In reply to Segher Boessenkool from comment #15)
> (In reply to Daniel Marjamäki from comment #12)
> > So, how would you fix the warning for `f`? Many programmers would "fix" it
> > with a cast.
> >
> > Assuming that `s` and `u` can have arbitrary values, here is the proper code:
> >
> > void f(long s, unsigned long u) { if (s >= 0 && s == u) g(); }
> >
> > For this correct code, gcc warns.
>
> A much better fix is
>
> void f1(long s, unsigned long u) { unsigned long su = s; if (su == u) g(); }
>
> which makes it rather explicit what is going on.
>
> Still much better is to not mixed signedness in types at all.
Ping. Your "much better" code does not work. This code prints "equal" on the
screen:
void f1(long s, unsigned long u) {
unsigned long su = s;
if (su == u) printf("equal\n");
}
int main() { f1(-1L, ~0UL); return 0; }
Please try again.
You proved my point somewhat. The programmer gets a warning, the programmer
tries to fix it, the code still has the same bug but the warning has gone away.
However I feel that your fix is much safer than a cast because Cppcheck,
sanitizers, etc can still warn.
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Subject: [Bug target/92566] rs6000_preferred_simd_mode isn't very good
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--- Comment #13 from Kewen Lin <linkw at gcc dot gnu.org> ---
Author: linkw
Date: Thu Nov 28 06:34:31 2019
New Revision: 278800
URL: https://gcc.gnu.org/viewcvs?rev=278800&root=gcc&view=rev
Log:
[rs6000] Fix PR92566 by checking VECTOR_UNIT_NONE_P
As Segher pointed out in PR92566, we shouldn't offer some vector modes which
aren't supported under current setting. This patch is to make it check by
VECTOR_UNIT_NONE_P which is initialized as current architecture masks.
2019-11-28 Kewen Lin <linkw@gcc.gnu.org>
PR target/92566
* gcc/config/rs6000/rs6000.c (rs6000_preferred_simd_mode): Check by
VECTOR_UNIT_NONE_P instead.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/rs6000/rs6000.c
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Subject: [Bug target/92566] rs6000_preferred_simd_mode isn't very good
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Kewen Lin <linkw at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #14 from Kewen Lin <linkw at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug rtl-optimization/92591] ICE in optimize_sc, at modulo-sched.c:1063
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Roman Zhuykov <zhroma at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #47379|0 |1
is obsolete| |
--- Comment #4 from Roman Zhuykov <zhroma at gcc dot gnu.org> ---
Created attachment 47386
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47386&action=edit
Proposed patch v2
Found a mistake in previous patch
>From gcc-bugs-return-661629-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 07:40:35 2019
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Subject: [Bug c++/92700] wrong "unintialized" warning with std::optional
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Blocks| |24639
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
We at least do have other PRs complaining about std::optional
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=24639
[Bug 24639] [meta-bug] bug to track all Wuninitialized issues
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Subject: [Bug bootstrap/92699] Slash should be removed from C/C++ plugin install destination
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |build
Host| |MinGW-w64
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Hmm, I think people just call make install DESTDIR=/foo/bar without a trailing
slash so we do need some kind of dir separator or canonicalization of DESTDIR?
>From gcc-bugs-return-661631-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 07:45:34 2019
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Subject: [Bug preprocessor/92696] #pragma GCC diagnostic ... interferes with if/else
Date: Thu, 28 Nov 2019 07:45:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Not a bug then.
>From gcc-bugs-return-661632-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 07:45:53 2019
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From: "paul.richard.thomas at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/92123] [F2018/array-descriptor] Scalar allocatable/pointer with array descriptor (via bind(C)): ICE with select rank or error scalar variable with POINTER or ALLOCATABLE in procedure with BIND(C) is not yet supported
Date: Thu, 28 Nov 2019 07:45:00 -0000
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--- Comment #21 from paul.richard.thomas at gmail dot com <paul.richard.thomas at gmail dot com> ---
Hi All,
I took one of the other fn_spec's as a template - it might well have
been internal_pack.
Thanks for looking at this.
Cheers
Paul
On Mon, 25 Nov 2019 at 13:04, jakub at gcc dot gnu.org
<gcc-bugzilla@gcc.gnu.org> wrote:
>
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92123
>
> --- Comment #15 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
> I think other fn spec attributes in trans-decl.c should be checked.
> E.g. for internal_pack, I see ".r", when the function sometimes returns a
> pointer to a field pointed by the first argument. The address of the
> descriptor doesn't escape then, but there is indirect escape. What about
> internal_unpack?
> Both cfi_desc_to_gfc_desc and gfc_desc_to_cfi_desc should be ".w." as Richi
> said.
>
> --
> You are receiving this mail because:
> You are on the CC list for the bug.
> You are the assignee for the bug.
>From gcc-bugs-return-661633-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 07:49:25 2019
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Subject: [Bug bootstrap/92699] Slash should be removed from C/C++ plugin install destination
Date: Thu, 28 Nov 2019 07:49:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Last reconfirmed| |2019-11-28
CC| |dmalcolm at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
OK, so almost all other uses of $(DESTDIR) do not have a following '/'
character
so the proposed change sounds quite obvious. All cases containing
'$(DESTDIR)/':
./gcc/c/Make-lang.in: $(INSTALL_DATA) cc1$(exeext).a
$(DESTDIR)/$(plugin_resourcesdir)/cc1$(exeext).a
./gcc/jit/ChangeLog.jit: "$(DESTDIR)/$(libdir)/pkgconfig".
./gcc/jit/Make-lang.in: $(DESTDIR)/$(libdir)/$(LIBGCCJIT_FILENAME)
./gcc/jit/Make-lang.in: $(DESTDIR)/$(libdir)/$(LIBGCCJIT_SONAME_SYMLINK)
./gcc/jit/Make-lang.in: $(DESTDIR)/$(libdir)/$(LIBGCCJIT_LINKER_NAME_SYMLINK)
./gcc/jit/Make-lang.in: $(DESTDIR)/$(includedir)/libgccjit.h
./gcc/jit/Make-lang.in: $(DESTDIR)/$(includedir)/libgccjit++.h
./gcc/cp/Make-lang.in: $(INSTALL_DATA) cc1plus$(exeext).a
$(DESTDIR)/$(plugin_resourcesdir)/cc1plus$(exeext).a
David - most of them are in libjit, would you please take care of adjusting
those and also the rest and do some testing (you seem to play with plugins
as well recently ;)). The other '/' in libjit are probably similarly
bogus. Thanks.
>From gcc-bugs-return-661634-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 08:00:34 2019
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Subject: [Bug c++/92136] cc1plus segv with CTAD and -fchecking
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Pilar Latiesa <pilarlatiesa at gmail dot com> changed:
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--- Comment #4 from Pilar Latiesa <pilarlatiesa at gmail dot com> ---
The issue vanished for 10.0.0 20191126 (x86_64-pc-linux-gnu). Maybe Jason fixed
it while implementing CTAD for alias templates.
The testcases, however, produce an ICE in 9.2, 8.3, and 7.5, when compiled with
-std=c++17 -fchecking.
>From gcc-bugs-return-661635-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 08:06:46 2019
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Subject: [Bug c++/92695] P1064R0 - virtual constexpr fails if object taken from array
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--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Nov 28 08:06:09 2019
New Revision: 278802
URL: https://gcc.gnu.org/viewcvs?rev=278802&root=gcc&view=rev
Log:
PR c++/92695
* decl2.c (mark_used): Don't call note_vague_linkage_fn for pure
virtual functions, even if they are declared inline.
* g++.dg/warn/inline3.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/warn/inline3.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/decl2.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-661636-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 08:16:16 2019
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Subject: [Bug fortran/92123] [F2018/array-descriptor] Scalar allocatable/pointer with array descriptor (via bind(C)): ICE with select rank or error scalar variable with POINTER or ALLOCATABLE in procedure with BIND(C) is not yet supported
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--- Comment #22 from rguenther at suse dot de <rguenther at suse dot de> ---
On Wed, 27 Nov 2019, jakub at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92123
>
> --- Comment #20 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
> Created attachment 47377
> --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47377&action=edit
> gcc10-fnspec-test.patch
>
> Just for archival purposes, here is a short gcc plugin that allows testing "fn
> spec" attribute (on direct function calls only, not on indirect calls), by
> registering a fn_spec attribute and remapping it to "fn spec" when finish_decl
> is called.
I guess sth like -fenable-internal-attributes registering both
fn_spec and no_vops would be nice for testing those. Or better
an (undocumented) --param. There's also "asan odr inidicator"
and various "omp declare .." ones, eventually generically adjusting
matching of the attribute names with the param/flag set can be done.
>From gcc-bugs-return-661637-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 08:20:00 2019
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Subject: [Bug preprocessor/92696] #pragma GCC diagnostic ... interferes with if/else
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--- Comment #5 from Stephan Bergmann <sbergman at redhat dot com> ---
...but something that needs proper documentation?
>From gcc-bugs-return-661638-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 08:36:16 2019
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Subject: [Bug c++/88136] -Wdeprecated-copy is draconian and shouldn't be in -Wall
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Stephan Bergmann <sbergman at redhat dot com> changed:
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----------------------------------------------------------------------------
CC| |sbergman at redhat dot com
--- Comment #9 from Stephan Bergmann <sbergman at redhat dot com> ---
(In reply to Ville Voutilainen from comment #2)
> This is not just a Qt problem. I will write a proposal to undeprecate this
> deprecation for C++20 before the next committee meeting.
Can you give a link to that proposal?
>From gcc-bugs-return-661639-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 08:36:43 2019
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Subject: [Bug tree-optimization/92691] [10 Regression] ICE in strlen_dom_walker::before_dom_children at gcc/tree-ssa-strlen.c:5177 since r274933
Date: Thu, 28 Nov 2019 08:36:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92691
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Nov 28 08:36:06 2019
New Revision: 278803
URL: https://gcc.gnu.org/viewcvs?rev=278803&root=gcc&view=rev
Log:
PR tree-optimization/92691
* tree-ssa-strlen.c (handle_store): Clarify return value meaning
in function comment.
(strlen_check_and_optimize_call): Likewise. For handle_printf_call
calls, return !handle_printf_call rather than always returning true.
(check_and_optimize_stmt): Describe return value meaning in function
comment. Formatting fix.
* gcc.dg/tree-ssa/builtin-snprintf-10.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/tree-ssa/builtin-snprintf-10.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-strlen.c
>From gcc-bugs-return-661640-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 08:50:49 2019
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Subject: [Bug tree-optimization/92691] [10 Regression] ICE in strlen_dom_walker::before_dom_children at gcc/tree-ssa-strlen.c:5177 since r274933
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-661641-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 08:54:58 2019
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Subject: [Bug c++/88136] -Wdeprecated-copy is draconian and shouldn't be in -Wall
Date: Thu, 28 Nov 2019 08:54:00 -0000
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--- Comment #10 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I don't think it has been written yet.
>From gcc-bugs-return-661642-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 09:02:56 2019
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Subject: [Bug c++/92411] conformance issue with reinterpret_cast in constant expressions
Date: Thu, 28 Nov 2019 09:02:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-11-28
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=82304
Ever confirmed|0 |1
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I see no regression, it has always been accepted by G++.
Possibly a dup of Bug 82304.
>From gcc-bugs-return-661643-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 09:10:44 2019
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Subject: [Bug c++/82304] GCC compiles constexpr function with double reinterpret_cast in a constant context
Date: Thu, 28 Nov 2019 09:10:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Reduced:
constexpr const char* testfunc(const char* p)
{
auto l = reinterpret_cast<unsigned long long>(p);
++l
return reinterpret_cast<const char*>(l);
}
constexpr auto s = testfunc("Hello");
I assume the problem here and in Bug 92411 is that the compiler is folding the
casts away.
>From gcc-bugs-return-661645-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 09:24:37 2019
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Subject: [Bug target/92190] [10 Regression] ICE in sp_valid_at, at config/i386/i386.c:6162 since r276648
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Is CLOBBER the right representation of what vzeroupper does anyway?
I mean, for AVX512F+, shouldn't it be
(set (reg:V8DI xmm0) (vec_merge:V8DI (reg:V8DI xmm0) (const_vector:V8DI 0)
(const_int 3)))
...
and similarly for AVX/AVX2 (in that case V4DI instead of V8DI)?
And, as mentioned earlier, it could leave out register that aren't ever live in
the function, as long as it can't be introduced into the function later on.
>From gcc-bugs-return-661644-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 09:24:32 2019
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Subject: [Bug libstdc++/91997] pretty printers: The __node_type type alias in _Hashtable is not available
Date: Thu, 28 Nov 2019 09:24:00 -0000
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----------------------------------------------------------------------------
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
>From https://bugzilla.redhat.com/show_bug.cgi?id=1053438 this also happens with
std::list
#include <stdio.h>
#include <list>
#include <string>
int main() {
std::list<std::string> list;
list.push_back("a");
std::list<std::string>::iterator it=list.begin();
return 0;
}
$ gdb -q -ex "br 8" -ex r -ex "p it" a.out
Reading symbols from a.out...
Breakpoint 1 at 0x401237: file 91997.cc, line 8.
Starting program: /tmp/a.out
Breakpoint 1, main () at 91997.cc:8
8 return 0;
Python Exception <class 'ValueError'> Cannot find type
std::__cxx11::list<std::__cxx11::basic_string<char, std::char_traits<char>,
std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char,
std::char_traits<char>, std::allocator<char> > > >::iterator::_Node:
$1 =
(gdb)
>From gcc-bugs-return-661646-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 09:28:55 2019
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Subject: [Bug c/91839] missing error diagnosis for undeclared identifier
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |dmalcolm at gcc dot gnu.org
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I can confirm GCC doesn't suggest l_24, but I'm not sure it's reasonable to
expect it to do so after so many parse errors.
If you fix the first two errors then you do get it:
91839.c:6:10: error: ‘l_2’ undeclared (first use in this function); did you
mean ‘l_24’?
6 | return l_2[0]; //error
| ^~~
| l_24
Your code is ill-formed. GCC tells you it's ill-formed. I don't see a bug here.
>From gcc-bugs-return-661647-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 09:56:42 2019
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Subject: [Bug fortran/92702] New: [F2008] (and hence [F2018]) Implement VALUE support for arrays
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92702
Bug ID: 92702
Summary: [F2008] (and hence [F2018]) Implement VALUE support
for arrays
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Currently, everything with 'dimension' is rejected, but F2008 (and F2018) now
permits everything with known size.
F2018:
C557 An entity with the VALUE attribute shall be a dummy data object that is
not an assumed-size array or a coarray, and does not have a coarray ultimate
component.
C558 An entity with the VALUE attribute shall not have the ALLOCATABLE, INTENT
(INOUT), INTENT(OUT), POINTER, or VOLATILE attributes.
F2008:
C557 An entity with the VALUE attribute shall be a dummy data object that is
not an assumed-size array or a coarray, and does not have a coarray ultimate
component.
By contrast, F2003 didn't permit DIMENSION:
C527 (R501) If the VALUE attribute is specified, the PARAMETER, EXTERNAL,
POINTER, ALLOCATABLE, DIMENSION, VOLATILE, INTENT(INOUT), or INTENT(OUT)
attribute shall not be specified.
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Subject: [Bug c++/88136] -Wdeprecated-copy is draconian and shouldn't be in -Wall
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--- Comment #11 from Ville Voutilainen <ville.voutilainen at gmail dot com> ---
(In reply to Jonathan Wakely from comment #10)
> I don't think it has been written yet.
Right; I decided against it, since the cats are out of the bag and shipping
implementations voted with their feet, so Rule of Five is now the law of the
land, as far as I care.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/92703] New: VALUE attribute: CLASS and derived-type with allocatable components mishandled
Date: Thu, 28 Nov 2019 10:00:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92703
Bug ID: 92703
Summary: VALUE attribute: CLASS and derived-type with
allocatable components mishandled
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Keywords: wrong-code
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: burnus at gcc dot gnu.org
Blocks: 92702
Target Milestone: ---
The test case shows that allocatable components of derived types are not copied
– just the derived type is (automatically) passed by value (according to the
platform ABI).
Hence, it works fine for data which is directly in the derived type – but not
for allocatable components.
With CLASS, I am not quite sure what goes wrong. I initially thought it is just
a missing copy – as the dump shows:
class.20._data = &var;
classy (&class.20);
But if I print x%A(:), it looks complete random and uninitialized.
Xref: PR 92702 – As it is also about copy-in of data (and later
finalizing/deallocation, if needed), I cross reference PR fortran/92702 which
is about VALUE + DIMENSION (permitted since F2008).
Testcase:
! { dg-do run }
!
! VALUE mishandled for CLASS and with ALLOCATABLE components
!
program main
implicit none (type, external)
type t
integer :: A(100)
complex :: B(1000,1000)
end type t
type t2
integer, allocatable :: C(:)
end type t2
type(t) :: var
type(t2) :: var2
integer :: i
allocate(var2%C(5))
var2%C = [1,2,3,4,5]
call foo(var2) ! var passed by value but var2%C not copied, hence:
if (any(var2%C /= [1,2,3,4,5])) stop 2 ! FAILS HERE
var%A = [((21*i), i = 1,100)]
call classy(var)
if (any(var%A /= [((21*i), i = 1, 100)])) stop 1
contains
subroutine foo(y)
type(t2), value :: y
if (any(y%C /= [1,2,3,4,5])) stop 11
y%C = [99,98,97,96,95]
if (any(y%C /= [99,98,97,96,95])) stop 13
end subroutine foo
subroutine classy(y)
class(t), value :: y
if (any(y%A /= [((21*i), i = 1, 100)])) stop 1 ! FAILS HERE
y%A(1) = 4
if (y%A(1) /= 4) stop 22
end subroutine classy
end program main
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92702
[Bug 92702] [F2008] (and hence [F2018]) Implement VALUE support for arrays
>From gcc-bugs-return-661650-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 10:06:30 2019
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Subject: [Bug fortran/92703] VALUE attribute: CLASS and derived-type with allocatable components mishandled
Date: Thu, 28 Nov 2019 10:06:00 -0000
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--- Comment #1 from Tobias Burnus <burnus at gcc dot gnu.org> ---
(In reply to Tobias Burnus from comment #0)
> With CLASS, I am not quite sure what goes wrong. I initially thought it is
> just a missing copy – as the dump shows:
>
> class.20._data = &var;
> classy (&class.20);
>
> But if I print x%A(:), it looks complete random and uninitialized.
With -O0, one indeed runs into 'stop 2' - i.e. '&var' is not copied.
However, with -O1 it fails with the uninit memory. I assume that the alias
analysis gets in trouble, cf. PR 92123.
I think alias analysis will turn out to be a non-issue once VALUE is proper
handled, but I wonder whether some corner case can still cause problems.
>From gcc-bugs-return-661651-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 10:12:40 2019
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Subject: [Bug tree-optimization/83819] [meta-bug] missing strlen optimizations
Date: Thu, 28 Nov 2019 10:12:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83819
Bug 83819 depends on bug 92683, which changed state.
Bug 92683 Summary: [10 Regression] strncmp incorrect result with equal substrings and non-const bound
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92683
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Resolution|FIXED |---
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Subject: [Bug tree-optimization/92683] [10 Regression] strncmp incorrect result with equal substrings and non-const bound
Date: Thu, 28 Nov 2019 10:12:00 -0000
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Rainer Orth <ro at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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CC| |ro at gcc dot gnu.org
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--- Comment #3 from Rainer Orth <ro at gcc dot gnu.org> ---
The new gcc.dg/strcmpopt_8.c test FAILs on 64-bit i386-pc-solaris2.11,
sparc-sun-solaris2.11, and (according to gcc-testresults)
powerpc-apple-darwin9:
+FAIL: gcc.dg/strcmpopt_8.c (test for excess errors)
+FAIL: gcc.dg/strcmpopt_8.c scan-tree-dump-not forwprop1 "strncmp"
Excess errors:
/vol/gcc/src/hg/trunk/local/gcc/testsuite/gcc.dg/strcmpopt_8.c:22:15: warning:
'__builtin_strncmp' specified bound 18446744073709551615 exceeds maximum object
size 9223372036854775807 [-Wstringop-overflow=]
/vol/gcc/src/hg/trunk/local/gcc/testsuite/gcc.dg/strcmpopt_8.c:22:15: warning:
'__builtin_strncmp' specified bound 18446744073709551615 exceeds maximum object
size 9223372036854775807 [-Wstringop-overflow=]
/vol/gcc/src/hg/trunk/local/gcc/testsuite/gcc.dg/strcmpopt_8.c:22:15: warning:
'__builtin_strncmp' specified bound 18446744073709551615 exceeds maximum object
size 9223372036854775807 [-Wstringop-overflow=]
/vol/gcc/src/hg/trunk/local/gcc/testsuite/gcc.dg/strcmpopt_8.c:22:15: warning:
'__builtin_strncmp' specified bound 18446744073709551615 exceeds maximum object
size 9223372036854775807 [-Wstringop-overflow=]
/vol/gcc/src/hg/trunk/local/gcc/testsuite/gcc.dg/strcmpopt_8.c:22:15: warning:
'__builtin_strncmp' specified bound 18446744073709551615 exceeds maximum object
size 9223372036854775807 [-Wstringop-overflow=]
/vol/gcc/src/hg/trunk/local/gcc/testsuite/gcc.dg/strcmpopt_8.c:22:15: warning:
'__builtin_strncmp' specified bound 18446744073709551615 exceeds maximum object
size 9223372036854775807 [-Wstringop-overflow=]
/vol/gcc/src/hg/trunk/local/gcc/testsuite/gcc.dg/strcmpopt_8.c:22:15: warning:
'__builtin_strncmp' specified bound 18446744073709551615 exceeds maximum object
size 9223372036854775807 [-Wstringop-overflow=]
>From gcc-bugs-return-661653-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 10:28:47 2019
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Subject: [Bug fortran/92123] [F2018/array-descriptor] Scalar allocatable/pointer with array descriptor (via bind(C)): ICE with select rank or error scalar variable with POINTER or ALLOCATABLE in procedure with BIND(C) is not yet supported
Date: Thu, 28 Nov 2019 10:28:00 -0000
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--- Comment #23 from Tobias Burnus <burnus at gcc dot gnu.org> ---
I have the feeling that some other use also disagrees between ME and FE/Fortran
semantics assumptions.
I just run into PR 92703: if one comments the unrelated 'foo', with -O0 one
gets the expected 'stop 2' but with -O1 one gets 'stop 21' as (effectively) the
'class.20._data = &var;' has been optimized away. — For that PR, to properly
handle Fortran semantic, a copy of 'var' had to be created and used instead. I
think that would have solved the alias/ME problem for *that* usage/test case.
Still, I fear that similar test cases can be created where for -O0 the
executable produces the correct result – but where with optimization, the
result will be wrong.
Based on the test case in PR 92703, I wonder about types like:
type t
integer, allocatable :: A
integer, pointer :: P
end type t
type(t) :: var
call foo(var)
'var' has no pointer/target attribute and, hence, it cannot alias (or if it
does as in 'call bar(var, var)' it may not be modified in bar). – Also 'var%A'
cannot alias – but 'var%P' can – as it has the pointer attribute.
If 'foo' has 'intent(in)' for 'var', 'var' and 'var%A' may not be modified nor
the pointer address (pointer association) of 'var%P'. But the value of 'var%P'
may.
With CLASS and descriptor handling with BIND(C) [cf. this PR], I fear there are
extra issues due to the auxiliary variables/wrappers generated by the FE.
[Besides the general issue of Fortran semantic and mapping it to TYPE_RESTRICT
and 'fn spec', I have also the feeling that such auxiliary vars cause breakage
as they do not always follow the Fortran semantic.]
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Subject: [Bug target/92055] [avr] Support 64-bit double
Date: Thu, 28 Nov 2019 10:30:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92055
--- Comment #11 from Georg-Johann Lay <gjl at gcc dot gnu.org> ---
Author: gjl
Date: Thu Nov 28 10:29:30 2019
New Revision: 278805
URL: https://gcc.gnu.org/viewcvs?rev=278805&root=gcc&view=rev
Log:
Must use push insn to pass varargs arguments of DFmode because
otherwise the middle-end generates wrong code.
PR target/92055
* config/avr/avr.md (MPUSH) [DF, DC]: Add modes to mode iterator.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/avr/avr.md
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Subject: [Bug tree-optimization/92704] New: [8/9/10 Regression] ICE: Segmentation fault (in process_bb)
Date: Thu, 28 Nov 2019 10:42:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92704
Bug ID: 92704
Summary: [8/9/10 Regression] ICE: Segmentation fault (in
process_bb)
Product: gcc
Version: 10.0
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: x86_64-pc-linux-gnu
gcc-10.0.0-alpha20191124 snapshot (r278660) and 9.2.0 ICE when compiling the
following testcase w/ -O3 -fexceptions -fnon-call-exceptions -fno-tree-dce:
int zr, yx;
void __attribute__ ((simd))
oj (int rd, int q7)
{
int wo = &rd;
while (q7 < 1)
{
int kv;
short int v3;
for (v3 = 0; v3 < 82; v3 += 3)
{
}
kv = zr ? 0 : v3;
yx = kv < rd;
zr = zr && yx;
++q7;
}
}
% x86_64-pc-linux-gnu-gcc-10.0.0-alpha20191124 -O3 -fexceptions
-fnon-call-exceptions -fno-tree-dce -w -c xmnlq6pk.c
during GIMPLE pass: ifcvt
xmnlq6pk.c: In function 'oj.simdclone.0':
xmnlq6pk.c:4:1: internal compiler error: Segmentation fault
4 | oj (int rd, int q7)
| ^~
0xd11940 crash_signal
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191124/work/gcc-10-20191124/gcc/toplev.c:328
0xec0494 process_bb
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191124/work/gcc-10-20191124/gcc/tree-ssa-sccvn.c:6705
0xec1818 do_rpo_vn
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191124/work/gcc-10-20191124/gcc/tree-ssa-sccvn.c:7168
0xec2e63 do_rpo_vn(function*, edge_def*, bitmap_head*)
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191124/work/gcc-10-20191124/gcc/tree-ssa-sccvn.c:7265
0xd8071f tree_if_conversion(loop*, vec<gimple*, va_heap, vl_ptr>*)
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191124/work/gcc-10-20191124/gcc/tree-if-conv.c:3090
0xd822e6 execute
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191124/work/gcc-10-20191124/gcc/tree-if-conv.c:3170
0xd822e6 execute
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191124/work/gcc-10-20191124/gcc/tree-if-conv.c:3157
gcc 8.3.0 fails differently (via godbolt):
<source>: In function 'oj.simdclone.0':
<source>:4:1: error: missing PHI def
oj (int rd, int q7)
^~
.MEM_110 = PHI <(5), .MEM_103(50)>
<source>:4: confused by earlier errors, bailing out
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Subject: [Bug tree-optimization/91790] ICE: verify_ssa failed (error: definition in block 2 follows the use)
Date: Thu, 28 Nov 2019 10:45:00 -0000
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Arseny Solokha <asolokha at gmx dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work|9.2.1 |
--- Comment #13 from Arseny Solokha <asolokha at gmx dot com> ---
I believe some backports are pending?
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Subject: [Bug libstdc++/91997] pretty printers: The __node_type type alias in _Hashtable is not available
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Subject: [Bug libstdc++/91997] pretty printers: The __node_type type alias in _Hashtable is not available
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----------------------------------------------------------------------------
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>From gcc-bugs-return-661659-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 11:47:37 2019
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Subject: [Bug c++/92705] New: [10 Regression] ICE: Segmentation fault (in build_new_op_1)
Date: Thu, 28 Nov 2019 11:47:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92705
Bug ID: 92705
Summary: [10 Regression] ICE: Segmentation fault (in
build_new_op_1)
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Keywords: error-recovery, ice-on-invalid-code
Severity: normal
Priority: P3
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Assignee: unassigned at gcc dot gnu.org
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Target Milestone: ---
g++-10.0.0-alpha20191124 snapshot (r278660) ICEs when compiling the following
testcase reduced from test/SemaCXX/builtin-ptrtomember-overload-1.cpp from the
clang 9.0.0 test suite:
struct A {};
struct E {};
struct R {
operator E*();
};
struct S {
operator E*();
};
struct B1 : R, S {
operator A*();
};
void foo1(B1 b1, int E::* pmf) {
int i = b1->*pmf;
}
% g++-10.0.0-alpha20191124 -c gmnbcjli.cpp
gmnbcjli.cpp: In function 'void foo1(B1, int E::*)':
gmnbcjli.cpp:17:22: internal compiler error: Segmentation fault
17 | int i = b1->*pmf;
| ^~~
0xf36080 crash_signal
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191124/work/gcc-10-20191124/gcc/toplev.c:328
0x839d0e build_new_op_1
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191124/work/gcc-10-20191124/gcc/cp/call.c:6375
0x83a33a build_new_op(op_location_t const&, tree_code, int, tree_node*,
tree_node*, tree_node*, tree_node**, int)
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191124/work/gcc-10-20191124/gcc/cp/call.c:6500
0x9f8dd1 build_x_binary_op(op_location_t const&, tree_code, tree_node*,
tree_code, tree_node*, tree_code, tree_node**, int)
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191124/work/gcc-10-20191124/gcc/cp/typeck.c:4223
0x92d178 cp_parser_binary_expression
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191124/work/gcc-10-20191124/gcc/cp/parser.c:9645
0x92e026 cp_parser_assignment_expression
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191124/work/gcc-10-20191124/gcc/cp/parser.c:9780
0x92d869 cp_parser_constant_expression
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191124/work/gcc-10-20191124/gcc/cp/parser.c:10074
0x92dfcb cp_parser_initializer_clause
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191124/work/gcc-10-20191124/gcc/cp/parser.c:23032
0x9320b7 cp_parser_initializer
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191124/work/gcc-10-20191124/gcc/cp/parser.c:22970
0x957b5b cp_parser_init_declarator
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191124/work/gcc-10-20191124/gcc/cp/parser.c:20678
0x93aa52 cp_parser_simple_declaration
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191124/work/gcc-10-20191124/gcc/cp/parser.c:13624
0x93c87f cp_parser_declaration_statement
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191124/work/gcc-10-20191124/gcc/cp/parser.c:13055
0x93d3c4 cp_parser_statement
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191124/work/gcc-10-20191124/gcc/cp/parser.c:11380
0x93e3c5 cp_parser_statement_seq_opt
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191124/work/gcc-10-20191124/gcc/cp/parser.c:11742
0x93e492 cp_parser_compound_statement
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191124/work/gcc-10-20191124/gcc/cp/parser.c:11696
0x953e74 cp_parser_function_body
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191124/work/gcc-10-20191124/gcc/cp/parser.c:22876
0x953e74 cp_parser_ctor_initializer_opt_and_function_body
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191124/work/gcc-10-20191124/gcc/cp/parser.c:22927
0x957005 cp_parser_function_definition_after_declarator
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191124/work/gcc-10-20191124/gcc/cp/parser.c:28597
0x957fe4 cp_parser_function_definition_from_specifiers_and_declarator
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191124/work/gcc-10-20191124/gcc/cp/parser.c:28513
0x957fe4 cp_parser_init_declarator
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191124/work/gcc-10-20191124/gcc/cp/parser.c:20505
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Subject: [Bug tree-optimization/92706] New: SRA confuses FRE
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92706
Bug ID: 92706
Summary: SRA confuses FRE
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: rguenth at gcc dot gnu.org
Target Milestone: ---
Reduced from one of the issues in PR92645
struct S { int i[4]; } __attribute__((aligned(128)));
typedef __int128_t my_int128 __attribute__((may_alias));
__int128_t load (void *p)
{
struct S v;
__builtin_memcpy (&v, p, sizeof (struct S));
struct S u;
u = v;
struct S w;
w = u;
return *(my_int128 *)&w;
}
>From gcc-bugs-return-661661-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 12:14:03 2019
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Subject: [Bug tree-optimization/92706] SRA confuses FRE
Date: Thu, 28 Nov 2019 12:14:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92706
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
CC| |jamborm at gcc dot gnu.org
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Martin - ESRA does something odd here, I see it turning
MEM[(charD.7 * {ref-all})&vD.1911] = MEM[(charD.7 * {ref-all})p_3(D)];
uD.1912 = vD.1911;
wD.1913 = uD.1912;
_7 = MEM[(my_int128D.1907 * {ref-all})&wD.1913];
into
MEM[(charD.7 * {ref-all})&vD.1911] = MEM[(charD.7 * {ref-all})p_3(D)];
uD.1912 = vD.1911;
u$i$0_1 = MEM[(struct S *)&vD.1911];
u$i$1_11 = MEM[(struct S *)&vD.1911 + 4B];
u$i$2_12 = MEM[(struct S *)&vD.1911 + 8B];
u$i$3_13 = MEM[(struct S *)&vD.1911 + 12B];
MEM[(struct S *)&wD.1913] = u$i$0_1;
MEM[(struct S *)&wD.1913 + 4B] = u$i$1_11;
MEM[(struct S *)&wD.1913 + 8B] = u$i$2_12;
MEM[(struct S *)&wD.1913 + 12B] = u$i$3_13;
w_18 = MEM[(struct S *)&wD.1913];
_7 = w_18;
where it totally scalarizes uD.1912 without factoring in the access
loading to w_18.
This creates a pass ordering issue with FRE which on the aggregate code
would have happily elided the aggregate copy but is confused about
the "scalarized" variant.
SRA sees
Access trees for w (UID: 1913):
access { base = (1913)'w', offset = 0, size = 1024, expr = w, type = struct S,
non_addressable = 0, reverse = 0, grp_read = 1, grp_write = 1,
grp_assignment_read = 0, grp_assignment_write = 1, grp_scalar_read = 0,
grp_scalar_write = 0, grp_total_scalarization = 0, grp_hint = 0, grp_covered =
0, grp_unscalarizable_region = 0, grp_unscalarized_data = 1, grp_partial_lhs =
0, grp_to_be_replaced = 0, grp_to_be_debug_replaced = 0, grp_maybe_modified =
0, grp_not_necessarilly_dereferenced = 0
* access { base = (1913)'w', offset = 0, size = 128, expr = MEM[(my_int128 *
{ref-all})&w], type = my_int128, non_addressable = 0, reverse = 0, grp_read =
1, grp_write = 1, grp_assignment_read = 1, grp_assignment_write = 1,
grp_scalar_read = 1, grp_scalar_write = 0, grp_total_scalarization = 0,
grp_hint = 0, grp_covered = 1, grp_unscalarizable_region = 0,
grp_unscalarized_data = 0, grp_partial_lhs = 0, grp_to_be_replaced = 1,
grp_to_be_debug_replaced = 0, grp_maybe_modified = 0,
grp_not_necessarilly_dereferenced = 0
so I wonder why it chooses to totally scalarize instead of using the
int128 access?
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Subject: [Bug tree-optimization/92706] SRA confuses FRE
Date: Thu, 28 Nov 2019 12:15:00 -0000
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
That is, I had the impression that for total scalarization SRA considers both
the accesses of the ultimate sources and the destinations?
>From gcc-bugs-return-661663-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 12:22:42 2019
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Subject: [Bug tree-optimization/92645] Hand written vector code is 450 times slower when compiled with GCC compared to Clang
Date: Thu, 28 Nov 2019 12:22:00 -0000
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--- Comment #15 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Nov 28 12:22:04 2019
New Revision: 278806
URL: https://gcc.gnu.org/viewcvs?rev=278806&root=gcc&view=rev
Log:
2019-11-28 Richard Biener <rguenther@suse.de>
PR tree-optimization/92645
* tree-ssa-forwprop.c (get_bit_field_ref_def): Also handle
conversions inside a mode class. Remove restriction on
preserving the element size.
(simplify_vector_constructor): Deal with the above and for
identity permutes also try using VEC_UNPACK_[FLOAT_]LO_EXPR
and VEC_PACK_TRUNC_EXPR.
* gcc.target/i386/pr92645-4.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr92645-4.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-forwprop.c
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Subject: [Bug tree-optimization/92704] [8/9/10 Regression] ICE: Segmentation fault (in process_bb)
Date: Thu, 28 Nov 2019 12:23:00 -0000
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prathamesh3492 at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |prathamesh3492 at gcc dot gnu.org
--- Comment #1 from prathamesh3492 at gcc dot gnu.org ---
This seems, to happen because we end up with following phi defining .MEM_113 in
ifcvt dump:
<bb 40> [local count: 3667364]:
# q7_91 = PHI <q7_15(5), q7_108(50)>
# zr_lsm.55_92 = PHI <iftmp.5_13(5), iftmp.5_105(50)>
# .MEM_113 = PHI <(5), .MEM_106(50)>
.MEM_113 phi seems to have NULL (!) arg, which then causes segfault in
following hunk in tree-ssa-sccvn.c:process_bb()
gphi *phi = gsi.phi ();
use_operand_p use_p = PHI_ARG_DEF_PTR_FROM_EDGE (phi, e);
tree arg = USE_FROM_PTR (use_p);
if (TREE_CODE (arg) != SSA_NAME
|| virtual_operand_p (arg))
continue;
Passing -fno-tree-loop-ifconvert in addition to other options, doesn't cause
the segfault. I assume phi args cannot be NULL ?
Thanks,
Prathamesh
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Subject: [Bug tree-optimization/92645] Hand written vector code is 450 times slower when compiled with GCC compared to Clang
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--- Comment #16 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Nov 28 12:26:50 2019
New Revision: 278807
URL: https://gcc.gnu.org/viewcvs?rev=278807&root=gcc&view=rev
Log:
2019-11-28 Richard Biener <rguenther@suse.de>
PR tree-optimization/92645
* tree-inline.c (remap_gimple_stmt): When the return value
is not wanted, elide GIMPLE_RETURN.
* gcc.dg/tree-ssa/inline-12.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/tree-ssa/inline-12.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-inline.c
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Subject: [Bug c++/92707] New: type alias on type alias on lambda in unevaluated context does not work
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Bug ID: 92707
Summary: type alias on type alias on lambda in unevaluated
context does not work
Product: gcc
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GCC shows an error on this code:
template <typename T>
using foo = decltype([] {});
template <typename U>
using bar = foo<U>;
extern foo<int> a;
extern bar<int> a; // error: 'bar' does not name a type
The error is wrong because bar is a regular type alias. Clearly it names a
type.
If I replace the lambda with an integer the error goes away.
>From gcc-bugs-return-661667-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 12:29:21 2019
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Subject: [Bug rtl-optimization/92176] LRA problem with reloads for subreg operands
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--- Comment #1 from Andreas Krebbel <krebbel at gcc dot gnu.org> ---
Created attachment 47387
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47387&action=edit
Another reduced testcase
gcc -O3 -march=z13 t.c -o t
./t
prints "checksum = 0" with head GCC
prints "checksum = 5" with GCCs before r272639 but this patch only appears to
reveal the actual issue
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Subject: [Bug rtl-optimization/92176] LRA problem with reloads for subreg operands
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--- Comment #2 from Andreas Krebbel <krebbel at gcc dot gnu.org> ---
Created attachment 47388
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47388&action=edit
Experimental patch
This patch fixes the second testcase. The first one currently doesn't fail on
head.
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Subject: [Bug rtl-optimization/92176] LRA problem with reloads for subreg operands
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Andreas Krebbel <krebbel at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
Severity|normal |major
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Subject: [Bug c++/92675] sign-conversion C++ unsigned int j = -1;
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--- Comment #6 from Jonny Grant <jg at jguk dot org> ---
Is the clearest way to write this as follows?
unsigned int j = (unsigned int)-1;
Likewise for the template example:
U max = (U)-1; // good
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Subject: [Bug rtl-optimization/92176] LRA problem with reloads for subreg operands
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--- Comment #3 from Andreas Krebbel <krebbel at gcc dot gnu.org> ---
276.ira:
(insn 6 85 11 2 (set (reg:SI 100 [ f ])
(mem/c:SI (symbol_ref:DI ("*.LANCHOR0") [flags 0x182]) [2 f+0 S4 A32]))
"t.c":13:8 1372 {*movsi_zarch}
(expr_list:REG_EQUIV (mem/c:SI (symbol_ref:DI ("*.LANCHOR0") [flags
0x182]) [2 f+0 S4 A32])
(nil)))
...
(insn 87 75 207 2 (parallel [
(set (mem/c:QI (plus:DI (reg/f:DI 165)
(const_int 16 [0x10])) [0 b+0 S1 A16])
(and:QI (mem/c:QI (plus:DI (reg/f:DI 165)
(const_int 16 [0x10])) [0 b+0 S1 A16])
(subreg:QI (reg:SI 100 [ f ]) 3)))
(clobber (reg:CC 33 %cc))
]) "t.c":13:8 1830 {*andqi3_zarch}
(expr_list:REG_DEAD (reg/f:DI 165)
(expr_list:REG_DEAD (reg:SI 100 [ f ])
(expr_list:REG_UNUSED (reg:CC 33 %cc)
(nil)))))
277.reload:
Reload at first generates two reloads for insn 87:
Changing pseudo 100 in operand 2 of insn 87 on equiv [`*.LANCHOR0']
Creating newreg=202, assigning class ALL_REGS to slow/invalid mem r202
Creating newreg=203, assigning class ALL_REGS to slow/invalid mem r203
87: {[r165:DI+0x10]=[r165:DI+0x10]&r203:QI;clobber %cc:CC;}
REG_DEAD r165:DI
REG_DEAD r100:SI
REG_UNUSED %cc:CC
Inserting slow/invalid mem reload before:
254: r202:SI=[`*.LANCHOR0']
255: r203:QI=r202:SI#3
(insn 254 0 0 (set (reg:SI 202)
(mem/c:SI (symbol_ref:DI ("*.LANCHOR0") [flags 0x182]) [2 f+0 S4 A32]))
1372 {*movsi_zarch}
(nil))
(insn 255 254 0 (set (reg:QI 203)
(subreg:QI (reg:SI 202) 3)) -1
(nil))
Both r202 as well as r203 get f0 assigned as hard register. In
lra_final_code_change-> alter_subregs-> alter_subreg -> simplify_subreg this
gets simplified to:
(insn 255 254 256 2 (set (reg:QI 16 %f0 [203])
(reg:QI 16 %f0 [orig:202+3 ] [202])) "t.c":13:8 1379 {*movqi}
(expr_list:REG_DEAD (reg:SI 16 %f0 [202])
(nil)))
Simplifying (subreg:QI (reg:SI 202) 3) to (reg:QI 16 %f0) is wrong on IBM Z
since floating point registers have a different endianess than general purpose
registers. Hence we forbid it via TARGET_CAN_CHANGE_MODE_CLASS. However, in
simplify_subreg_regno there is a check for lra_in_progress which leads to the
value of the target hook being ignored. Removing the lra_in_progress check
fixes the problem for. That change got in with the LRA patchset.
/* Give the backend a chance to disallow the mode change. */
if (GET_MODE_CLASS (xmode) != MODE_COMPLEX_INT
&& GET_MODE_CLASS (xmode) != MODE_COMPLEX_FLOAT
&& !REG_CAN_CHANGE_MODE_P (xregno, xmode, ymode)
/* We can use mode change in LRA for some transformations. */
&& ! lra_in_progress) <----- ?
return -1;
I'm currently checking whether removing it makes any difference in code
generation - apart from fixing the testcase.
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Subject: [Bug tree-optimization/92706] SRA confuses FRE
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-11-28
Ever confirmed|0 |1
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Testcase w/o too excessive alignment (and not relying on __int128):
typedef __UINT64_TYPE__ uint64_t;
typedef __UINT32_TYPE__ uint32_t;
struct S { uint32_t i[2]; } __attribute__((aligned(__alignof__(uint64_t))));
typedef uint64_t my_int64 __attribute__((may_alias));
uint64_t load (void *p)
{
struct S u, v, w;
uint64_t tem;
tem = *(my_int64 *)p;
*(my_int64 *)&v = tem;
u = v;
w = u;
return *(my_int64 *)&w;
}
nicely showing a case where the total scalarized aggregate doesn't
even go away?!
@@ -20,11 +64,13 @@
tem_5 = MEM[(my_int64 * {ref-all})p_4(D)];
MEM[(my_int64 * {ref-all})&v] = tem_5;
u = v;
- w = u;
- _9 = MEM[(my_int64 * {ref-all})&w];
- u ={v} {CLOBBER};
+ u$i$0_1 = v.i[0];
+ u$i$1_2 = v.i[1];
+ MEM <uint32_t> [(struct S *)&u] = u$i$0_1;
+ MEM <uint32_t> [(struct S *)&u + 4B] = u$i$1_2;
+ w_15 = MEM[(struct S *)&u];
+ _9 = w_15;
v ={v} {CLOBBER};
- w ={v} {CLOBBER};
return _9;
maybe it's because SRA arrives late at the decision to scalarize w?
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Subject: [Bug c++/60228] ICE using lambda in #pragma omp declare reduction
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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 #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 47389
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47389&action=edit
gcc10-pr60228.patch
Untested fix.
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Subject: [Bug fortran/92702] [F2008] (and hence [F2018]) Implement VALUE support for arrays + deferred-length parameters
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Tobias Burnus <burnus at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[F2008] (and hence [F2018]) |[F2008] (and hence [F2018])
|Implement VALUE support for |Implement VALUE support for
|arrays |arrays + deferred-length
| |parameters
--- Comment #1 from Tobias Burnus <burnus at gcc dot gnu.org> ---
The following restriction of F2003 is also gone:
C528 (R501) If the VALUE attribute is specified, the length type parameter
values shall be omitted or specified by initialization expressions.
F2008 + F2018 permit them.
Implementation choice (for characters and arrays): One can pass those with
known bounds as ARRAY_TYPE (i.e. by value) or one passes them as a pointer to
an ARRAY_TYPE (i.e. by reference).
Currently, for character they are passed by value as (known string-length)
ARRAY_TYPE.
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Bug ID: 92708
Summary: [Issue] dynamic_cast unexpected behavior in my code
Product: gcc
Version: 6.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: akhilesh.k at samsung dot com
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Hello
In below code I used class A and a class B which is derived from A. Now, I did
dynamic_cast I got segmentation fault. same behaviors I observed on ARM also.
is this expected behavior ? or some limitation.
As per below link seems some limitation with shared libraries.
https://gcc.gnu.org/faq.html#dso
akhilesh.k@DELL-BUILD10:$ cat hello.c
#include <stdio.h>
#include <iostream>
using namespace std;
class A
{
public:
A(){}
virtual ~A(){};
};
class B : public A
{
public:
B(){}
virtual ~B(){}
};
int main()
{
A *pa, *pa2;
B *pb, *pb2;
pa = new A;
pb = new B;
delete pb;
pa2 = dynamic_cast<A*>(pb);
pb2 = dynamic_cast<B*>(pb);
pb2 = dynamic_cast<B*>(pa2);
printf("pb2 = %p\n", pb2);
pb2 = dynamic_cast<B*>(pa);
printf("pb2 = %p\n", pb2);
delete pa;
delete pb;
return 0;
}
akhilesh.k@DELL-BUILD10:$ g++ -g hello.c
akhilesh.k@DELL-BUILD10:$ gdb a.out
GNU gdb (Ubuntu 7.7.1-0ubuntu5~14.04.3) 7.7.1
Copyright (C) 2014 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from a.out...done.
(gdb) r
Starting program: /data2/2706/akhilesh.k/a.out
Program received signal SIGSEGV, Segmentation fault.
0x00007ffff7b33156 in __dynamic_cast () from
/usr/lib/x86_64-linux-gnu/libstdc++.so.6
(gdb) bt
#0 0x00007ffff7b33156 in __dynamic_cast () from
/usr/lib/x86_64-linux-gnu/libstdc++.so.6
#1 0x000000000040095d in main () at hello.c:29
(gdb)
>From gcc-bugs-return-661676-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 14:03:06 2019
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Subject: [Bug c++/92705] [10 Regression] ICE: Segmentation fault (in build_new_op_1)
Date: Thu, 28 Nov 2019 14:03:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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Subject: [Bug tree-optimization/92704] [8/9/10 Regression] ICE: Segmentation fault (in process_bb)
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mine.
>From gcc-bugs-return-661678-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 14:10:24 2019
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Subject: [Bug fortran/92703] VALUE attribute: CLASS and derived-type with allocatable components mishandled
Date: Thu, 28 Nov 2019 14:10:00 -0000
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--- Comment #2 from Tobias Burnus <burnus at gcc dot gnu.org> ---
Actually, w/o checking the finally generated code, I have the feeling that for
*absent* arguments, the wrong code might be generated for:
character → dummy argument is ARRAY_TYPE
derived type + class → dummy argument is a struct
In both cases, null_pointer_node is passed as actual argument. Depending how
the argument is put on the stack and where the next argument is placed to, it
might work or not. Cf. also PR 92305 which feels related.
>From gcc-bugs-return-661679-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 14:13:07 2019
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Subject: [Bug libgcc/92709] New: Cross Compilation failed for Latest GCC riscv64-linux-gnu on Linux/WSL2
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make[3]: Entering directory
'/home/cqwrteur/gcc-riscv64-build/riscv64-linux-gnu/libgcc'
if [ -z "lib32/ilp32 lib32/ilp32d lib64/lp64 lib64/lp64d" ]; then \
true; \
else \
rootpre=`${PWDCMD-pwd}`/; export rootpre; \
srcrootpre=`cd ../../../gcc/libgcc; ${PWDCMD-pwd}`/; export srcrootpre; \
lib=`echo "${rootpre}" | sed -e 's,^.*/\([^/][^/]*\)/$,\1,'`; \
compiler="/home/cqwrteur/gcc-riscv64-build/./gcc/xgcc
-B/home/cqwrteur/gcc-riscv64-build/./gcc/ -B/usr/local/riscv64-linux-gnu/bin/
-B/usr/local/riscv64-linux-gnu/lib/ -isystem
/usr/local/riscv64-linux-gnu/include -isystem
/usr/local/riscv64-linux-gnu/sys-include "; \
for i in `${compiler} --print-multi-lib 2>/dev/null`; do \
dir=`echo $i | sed -e 's/;.*$//'`; \
if [ "${dir}" = "." ]; then \
true; \
else \
if [ -d ../${dir}/${lib} ]; then \
flags=`echo $i | sed -e 's/^[^;]*;//' -e 's/@/ -/g'`; \
if (cd ../${dir}/${lib}; make "AR=riscv64-linux-gnu-ar" "AR_FLAGS=rc"
"CC=/home/cqwrteur/gcc-riscv64-build/./gcc/xgcc
-B/home/cqwrteur/gcc-riscv64-build/./gcc/ -B/usr/local/riscv64-linux-gnu/bin/
-B/usr/local/riscv64-linux-gnu/lib/ -isystem
/usr/local/riscv64-linux-gnu/include -isystem
/usr/local/riscv64-linux-gnu/sys-include " "CFLAGS=-g -O2" "DESTDIR="
"EXTRA_OFILES=" "HDEFINES=" "INSTALL=/usr/bin/install -c"
"INSTALL_DATA=/usr/bin/install -c -m 644" "INSTALL_PROGRAM=/usr/bin/install -c"
"LDFLAGS=" "LOADLIBES=" "RANLIB=riscv64-linux-gnu-ranlib" "SHELL=/bin/bash"
"prefix=/usr/local" "exec_prefix=/usr/local" "libdir=/usr/local/lib"
"libsubdir=/usr/local/lib/gcc/riscv64-linux-gnu/10.0.0"
"tooldir=/usr/local/riscv64-linux-gnu" \
CFLAGS="-g -O2 ${flags}" \
CCASFLAGS=" ${flags}" \
FCFLAGS=" ${flags}" \
FFLAGS=" ${flags}" \
ADAFLAGS=" ${flags}" \
prefix="/usr/local" \
exec_prefix="/usr/local" \
GOCFLAGS="-O2 -g ${flags}" \
GDCFLAGS="-O2 -g ${flags}" \
CXXFLAGS="-g -O2 -D_GNU_SOURCE ${flags}" \
LIBCFLAGS="-g -O2 ${flags}" \
LIBCXXFLAGS="-g -O2 -D_GNU_SOURCE
-fno-implicit-templates ${flags}" \
LDFLAGS=" ${flags}" \
MULTIFLAGS="${flags}" \
DESTDIR="" \
INSTALL="/usr/bin/install -c" \
INSTALL_DATA="/usr/bin/install -c -m 644" \
INSTALL_PROGRAM="/usr/bin/install -c" \
INSTALL_SCRIPT="/usr/bin/install -c" \
all); then \
true; \
else \
exit 1; \
fi; \
else true; \
fi; \
fi; \
done; \
fi
make[4]: Entering directory
'/home/cqwrteur/gcc-riscv64-build/riscv64-linux-gnu/lib32/ilp32/libgcc'
make[4]: *** No rule to make target 'all'. Stop.
make[4]: Leaving directory
'/home/cqwrteur/gcc-riscv64-build/riscv64-linux-gnu/lib32/ilp32/libgcc'
Makefile:1211: recipe for target 'multi-do' failed
make[3]: *** [multi-do] Error 1
make[3]: Leaving directory
'/home/cqwrteur/gcc-riscv64-build/riscv64-linux-gnu/libgcc'
Makefile:125: recipe for target 'all-multi' failed
make[2]: *** [all-multi] Error 2
make[2]: Leaving directory
'/home/cqwrteur/gcc-riscv64-build/riscv64-linux-gnu/libgcc'
Makefile:14125: recipe for target 'all-target-libgcc' failed
make[1]: *** [all-target-libgcc] Error 2
make[1]: Leaving directory '/home/cqwrteur/gcc-riscv64-build'
Makefile:964: recipe for target 'all' failed
make: *** [all] Error 2
>From gcc-bugs-return-661680-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 14:27:32 2019
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Subject: [Bug fortran/92123] [F2018/array-descriptor] Scalar allocatable/pointer with array descriptor (via bind(C)): ICE with select rank or error scalar variable with POINTER or ALLOCATABLE in procedure with BIND(C) is not yet supported
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--- Comment #24 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Tobias Burnus from comment #23)
> I have the feeling that some other use also disagrees between ME and
> FE/Fortran semantics assumptions.
>
> I just run into PR 92703: if one comments the unrelated 'foo', with -O0 one
> gets the expected 'stop 2' but with -O1 one gets 'stop 21' as (effectively)
> the 'class.20._data = &var;' has been optimized away. — For that PR, to
> properly handle Fortran semantic, a copy of 'var' had to be created and used
> instead. I think that would have solved the alias/ME problem for *that*
> usage/test case.
Note it's not the semantic of the Fortran language that matters but the
actual semantics of the GFortran frontend generated IL that does. If
the Fortran language says for INTENT(IN) the variable isn't modified but
the underlying IL GFortran creates does exactly that then this is what
matters when you compute what to describe to the middle-end since the
middle-end cannot distinguish between "The Fortran Code" and the
"GFortran Implementation Details".
For example array descriptor handling is an important implementation detail
and INTENT() probably does _not_ talk about modifications/ownership of those.
>From gcc-bugs-return-661681-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 14:30:49 2019
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Subject: [Bug c++/92708] [Issue] dynamic_cast unexpected behavior in my code
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Akhilesh Kumar from comment #0)
> delete pb;
> pa2 = dynamic_cast<A*>(pb);
This is undefined behaviour, the pointer pb is no longer valid.
Also be aware that GCC 8.3 is the oldest release still supported by the GCC
project.
>From gcc-bugs-return-661682-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 14:42:04 2019
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From: "irfanadilovic at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/92484] In tree build of ISL 0.22 fails: requires C++11
Date: Thu, 28 Nov 2019 14:42:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92484
Irfan Adilovic <irfanadilovic at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |irfanadilovic at gmail dot com
--- Comment #6 from Irfan Adilovic <irfanadilovic at gmail dot com> ---
Here's my take on this.
GCC configure.ac has this:
# When bootstrapping with GCC, build stage 1 in C++98 mode to ensure that a
# C++98 compiler can still start the bootstrap.
if test "$enable_bootstrap:$GXX" = "yes:yes"; then
CXX="$CXX -std=gnu++98"
fi
which results in the CXX being defined as 'g++ -std=gnu++98 -std=c++11' in ISL
Makefiles (CXX propagated recursively). However this is *not* the problem, as
this CXX definition works just fine on C++11 source code.
This leads me to conclude that GCC must be using some kind of make variable
override mechanism, like invoking the ISL make with `make CXX="$CXX" all` which
leads to the complete override of CXX in ISL Makefiles, leaving out the
-std=c++11 flag, and leading to compilation failures of C++11 code in ISL.
Moreover, to reinforce this conclusion, running a plain 'make' in ISL build
subdir, right after the top-level make has failed, works just fine. It is only
when invoked recursively through toplevel Makefile, that it fails as described.
---
By invoking top-level make as 'make V=1 SHELL="/bin/bash -vx"' I've been able
to isolate the full make command used to build ISL (warning, it's a handful):
make "DESTDIR=" "RPATH_ENVVAR=LD_LIBRARY_PATH"
"TARGET_SUBDIR=x86_64-redhat-linux" "bindir=/usr/local/gcc-9.2.0/bin"
"datadir=/usr/local/gcc-9.2.0/share" "exec_prefix=/usr/local/gcc-9.2.0"
"includedir=/usr/local/gcc-9.2.0/include"
"datarootdir=/usr/local/gcc-9.2.0/share"
"docdir=/usr/local/gcc-9.2.0/share/doc/"
"infodir=/usr/local/gcc-9.2.0/share/info"
"pdfdir=/usr/local/gcc-9.2.0/share/doc/"
"htmldir=/usr/local/gcc-9.2.0/share/doc/" "libdir=/usr/local/gcc-9.2.0/lib"
"libexecdir=/usr/local/gcc-9.2.0/libexec" "lispdir="
"localstatedir=/usr/local/gcc-9.2.0/var"
"mandir=/usr/local/gcc-9.2.0/share/man" "oldincludedir=/usr/include"
"prefix=/usr/local/gcc-9.2.0" "sbindir=/usr/local/gcc-9.2.0/sbin"
"sharedstatedir=/usr/local/gcc-9.2.0/com" "sysconfdir=/usr/local/gcc-9.2.0/etc"
"tooldir=/usr/local/gcc-9.2.0/x86_64-redhat-linux"
"build_tooldir=/usr/local/gcc-9.2.0/x86_64-redhat-linux"
"target_alias=x86_64-redhat-linux" "AWK=gawk" "BISON=bison" "CC_FOR_BUILD=gcc"
"CFLAGS_FOR_BUILD=-g -O2" "CXX_FOR_BUILD=g++ -std=gnu++98" "EXPECT=expect"
"FLEX=flex" "INSTALL=/usr/bin/install -c" "INSTALL_DATA=/usr/bin/install -c -m
644" "INSTALL_PROGRAM=/usr/bin/install -c" "INSTALL_SCRIPT=/usr/bin/install -c"
"LDFLAGS_FOR_BUILD=" "LEX=flex" "M4=m4" "MAKE=make" "RUNTEST=runtest"
"RUNTESTFLAGS=" "SED=/bin/sed" "SHELL=/bin/bash -vx" "YACC=bison -y" "`echo
'ADAFLAGS=' | sed -e s'/[^=][^=]*=$/XFOO=/'`" "ADA_CFLAGS=" "AR_FLAGS=rc"
"`echo 'BOOT_ADAFLAGS=-gnatpg' | sed -e s'/[^=][^=]*=$/XFOO=/'`"
"BOOT_CFLAGS=-g -O2" "BOOT_LDFLAGS=" "CFLAGS=-g -O2" "CXXFLAGS=-g -O2"
"LDFLAGS=" "LIBCFLAGS=-g -O2" "LIBCXXFLAGS=-g -O2 -fno-implicit-templates"
"STAGE1_CHECKING=--enable-checking=release,types" "STAGE1_LANGUAGES=c,c++,lto"
"GNATBIND=no" "GNATMAKE=no" "GDC=@GDC@" "GDCFLAGS=-g -O2" "AR_FOR_TARGET=ar"
"AS_FOR_TARGET=as" "CC_FOR_TARGET=/root/gcc/gcc/build/./gcc/xgcc
-B/root/gcc/gcc/build/./gcc/" "CFLAGS_FOR_TARGET=-g -O2" "CPPFLAGS_FOR_TARGET="
"CXXFLAGS_FOR_TARGET=-g -O2 -D_GNU_SOURCE" "DLLTOOL_FOR_TARGET=dlltool"
"FLAGS_FOR_TARGET=-B/usr/local/gcc-9.2.0/x86_64-redhat-linux/bin/
-B/usr/local/gcc-9.2.0/x86_64-redhat-linux/lib/ -isystem
/usr/local/gcc-9.2.0/x86_64-redhat-linux/include -isystem
/usr/local/gcc-9.2.0/x86_64-redhat-linux/sys-include" "GFORTRAN_FOR_TARGET="
"GOC_FOR_TARGET=" "GOCFLAGS_FOR_TARGET=-O2 -g" "GDC_FOR_TARGET=@GDC@"
"GDCFLAGS_FOR_TARGET=-O2 -g" "LD_FOR_TARGET=ld" "LIPO_FOR_TARGET=lipo"
"LDFLAGS_FOR_TARGET=" "LIBCFLAGS_FOR_TARGET=-g -O2" "LIBCXXFLAGS_FOR_TARGET=-g
-O2 -D_GNU_SOURCE -fno-implicit-templates" "NM_FOR_TARGET=nm"
"OBJDUMP_FOR_TARGET=objdump" "OBJCOPY_FOR_TARGET=" "RANLIB_FOR_TARGET=ranlib"
"READELF_FOR_TARGET=readelf" "STRIP_FOR_TARGET=strip"
"WINDRES_FOR_TARGET=windres" "WINDMC_FOR_TARGET=windmc"
"BUILD_CONFIG=bootstrap-debug" "`echo 'LANGUAGES=' | sed -e
s'/[^=][^=]*=$/XFOO=/'`" "LEAN=false" "STAGE1_CFLAGS=-g" "STAGE1_CXXFLAGS=-g"
"STAGE1_GENERATOR_CFLAGS=" "STAGE1_TFLAGS=-fno-checking" "STAGE2_CFLAGS=-g -O2
-fno-checking -gtoggle" "STAGE2_CXXFLAGS=-g -O2 -fno-checking -gtoggle"
"STAGE2_GENERATOR_CFLAGS=" "STAGE2_TFLAGS=-fno-checking" "STAGE3_CFLAGS=-g -O2
-fchecking=1" "STAGE3_CXXFLAGS=-g -O2 -fchecking=1" "STAGE3_GENERATOR_CFLAGS="
"STAGE3_TFLAGS=-fchecking=1" "STAGE4_CFLAGS=-g -O2" "STAGE4_CXXFLAGS=-g -O2"
"STAGE4_GENERATOR_CFLAGS=" "STAGE4_TFLAGS=" "STAGEprofile_CFLAGS=-g -O2
-fno-checking -gtoggle -fprofile-generate" "STAGEprofile_CXXFLAGS=-g -O2
-fno-checking -gtoggle -fprofile-generate" "STAGEprofile_GENERATOR_CFLAGS="
"STAGEprofile_TFLAGS=-fno-checking" "STAGEtrain_CFLAGS=-g -O2"
"STAGEtrain_CXXFLAGS=-g -O2" "STAGEtrain_GENERATOR_CFLAGS="
"STAGEtrain_TFLAGS=" "STAGEfeedback_CFLAGS=-g -O2 -fprofile-use"
"STAGEfeedback_CXXFLAGS=-g -O2 -fprofile-use" "STAGEfeedback_GENERATOR_CFLAGS="
"STAGEfeedback_TFLAGS=" "STAGEautoprofile_CFLAGS=-g -O2 -fno-checking -gtoggle
-g" "STAGEautoprofile_CXXFLAGS=-g -O2 -fno-checking -gtoggle -g"
"STAGEautoprofile_GENERATOR_CFLAGS=" "STAGEautoprofile_TFLAGS=-fno-checking"
"STAGEautofeedback_CFLAGS=-g -O2 -fchecking=1" "STAGEautofeedback_CXXFLAGS=-g
-O2 -fchecking=1" "STAGEautofeedback_GENERATOR_CFLAGS="
"STAGEautofeedback_TFLAGS=-fchecking=1" "TFLAGS=" "CONFIG_SHELL=/bin/bash -vx"
"MAKEINFO=makeinfo --split-size=5000000 --split-size=5000000
--split-size=5000000" \
CFLAGS="-g" \
GENERATOR_CFLAGS="" \
CXXFLAGS="-g" \
LIBCFLAGS="-g -O2" \
CFLAGS_FOR_TARGET="-g -O2" \
CXXFLAGS_FOR_TARGET="-g -O2 -D_GNU_SOURCE" \
LIBCFLAGS_FOR_TARGET="-g -O2" \
'AR=ar' 'AS=as' 'CC=gcc' 'CXX=g++ -std=gnu++98' 'DLLTOOL=dlltool'
'GFORTRAN=' 'GOC=' 'GDC=@GDC@' 'LD=ld' 'LIPO=lipo' 'NM=nm' 'OBJDUMP=objdump'
'OTOOL=otool' 'RANLIB=ranlib' 'READELF=readelf' 'STRIP=strip' 'WINDRES=windres'
'WINDMC=windmc' 'CREATE_GCOV=create_gcov' \
LDFLAGS="${LDFLAGS}" HOST_LIBS="${HOST_LIBS}" V=1 \
TFLAGS="-fno-checking" \
all
The culprit being the 'CXX=g++ -std=gnu++98' in the last couple of lines. So
top-level gcc Makefile forces all dependencies to build in C++98, no matter
their own choice or requirements.
---
The question now becomes that of original intent: does the original designer of
the build system intentionally require the stage 1 of the build to be in C++98
(1) including all dependencies like MPFR, GMP, ISL and MPC, or (2) just the GCC
part?
Case (1) needs justification, as it disallows any dependency to use C++11 or
higher standard code.
Case (2) means we have a bug in the build system.
-- Irfan
>From gcc-bugs-return-661683-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 14:50:15 2019
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Subject: [Bug libstdc++/91997] pretty printers: The __node_type type alias in _Hashtable is not available
Date: Thu, 28 Nov 2019 14:50:00 -0000
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Rafael, I'm unable to reproduce this with unordered containers. Do you have a
testcase?
>From gcc-bugs-return-661684-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 14:52:12 2019
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Subject: [Bug c++/92654] [8/9/10 Regression] internal compiler error: in lookup_template_class_1
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--- Comment #7 from fiesh at zefix dot tv ---
And creduce just finished: (I left the ifdef unchanged so it can still be
compiled under clang.)
#ifdef __has_builtin
#define a 1
#endif
template <typename b, b c> struct d {
typedef b e;
constexpr operator e() const { return c; }
};
template <typename> using g = int;
template <typename b, b...> struct h {};
template <typename b, b aa>
using i
#if a
= __make_integer_seq<h, b, a>
#else
= h<b, __integer_pack(aa)...>
#endif
;
template <typename j, typename ac, ac... ad> void ae(j f, h<ac, ad...>) {
(f(d<ac, ad>{}), ...);
}
template <auto k, typename j> void af(j f) {
using ac = g<decltype(k)>;
using l = i<ac, k>;
ae(f, l{});
}
template <typename m, m n> using o = d<m, n>;
template <typename ag, typename j> struct t {
j f;
template <typename u> void operator()(u) { f(o<ag, ag(0)>{}); }
};
template <typename ag, typename j> void ai(j f) {
auto aj = t<ag, j>{f};
af<p(ag{})>(aj);
}
enum q {};
constexpr int p(q) { return 2; }
enum r { s };
template <q, unsigned long> struct C;
template <r> int ak(int const &);
template <template <q, unsigned long, q, unsigned long> typename,
template <q, unsigned long> typename al>
void am() {
ai<q>([](auto an) {
auto ao = decltype(an)();
[ao](auto ad) {
using u = decltype(ad);
if constexpr (al<ao, u{}>::ap)
;
};
});
}
template <q, unsigned long, q, unsigned long> struct D;
template <> int ak<s>(int const &) { am<D, C>; }
>From gcc-bugs-return-661685-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 15:32:16 2019
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Subject: [Bug tree-optimization/92710] New: [9/10 Regression] Vectoriser generates invalid simd call for bool arguments
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Bug ID: 92710
Summary: [9/10 Regression] Vectoriser generates invalid simd
call for bool arguments
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
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Target Milestone: ---
Target: aarch64*-*-*
#pragma omp declare simd
bool foo (bool) __attribute__((const));
void
f (bool *__restrict x, char *__restrict y, char *__restrict z)
{
for (int i = 0; i < 128; ++i)
x[i] = foo (y[i] == z[i]);
}
compiled with g++ -O3 -fopenmp-simd ICEs with:
foo.c: In function ‘void f(bool*, char*, char*)’:
foo.c:5:1: error: invalid conversion in gimple call
5 | f (bool *__restrict x, char *__restrict y, char *__restrict z)
| ^
vector(16) unsigned char
vector(16) bool
vect__14.10_9 = _Z3foob.simdclone.2 (mask__6.9_17);
during GIMPLE pass: vect
foo.c:5:1: internal compiler error: verify_gimple failed
0x150013e verify_gimple_in_cfg(function*, bool)
.../tree-cfg.c:5386
0x12b3cf7 execute_function_todo
.../passes.c:1997
0x12b2c75 do_per_function
.../passes.c:1638
0x12b3ee7 execute_todo
.../passes.c:2051
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
This is because we use a vector mask type for the result of the
comparison, but the function expects a normal nonmask vector instead.
The bug doesn't trigger on x86_64 because there the bool argument
is promoted to int.
>From gcc-bugs-return-661686-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 15:34:10 2019
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Subject: [Bug tree-optimization/92710] [9/10 Regression] Vectoriser generates invalid simd call for bool arguments
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rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2019-11-28
Assignee|unassigned at gcc dot gnu.org |rsandifo at gcc dot gnu.org
Target Milestone|--- |9.3
Ever confirmed|0 |1
--- Comment #1 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
I have a fix.
>From gcc-bugs-return-661687-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 15:40:23 2019
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From: "jamborm at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/92697] IPA-SRA modifies ifunc_resolvers
Date: Thu, 28 Nov 2019 15:40:00 -0000
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--- Comment #2 from Martin Jambor <jamborm at gcc dot gnu.org> ---
Author: jamborm
Date: Thu Nov 28 15:39:48 2019
New Revision: 278812
URL: https://gcc.gnu.org/viewcvs?rev=278812&root=gcc&view=rev
Log:
cgraph: ifunc resolvers cannot be made local (PR 92697)
2019-11-28 Martin Jambor <mjambor@suse.cz>
PR ipa/92697
* cgraph.c (cgraph_node_cannot_be_local_p_1): Return true for
ifunc_resolvers.
* symtab.c (symtab_node::dump_base): Dump ifunc_resolver flag.
Removed trailig whitespace.
testsuite/
* g++.dg/ipa/pr92697.C: New.
Added:
trunk/gcc/testsuite/g++.dg/ipa/pr92697.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/cgraph.c
trunk/gcc/symtab.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-661688-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 16:03:36 2019
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From: "hubicka at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/92711] New: GCC 10 libxul.so -fprofile-generate binary is 360MB while clang needs only 163MB.
Date: Thu, 28 Nov 2019 16:03:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92711
Bug ID: 92711
Summary: GCC 10 libxul.so -fprofile-generate binary is 360MB
while clang needs only 163MB.
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: hubicka at gcc dot gnu.org
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It seems that profiling became more expensive in GCC10 compared to clang or
previous GCC releases.
Clang binary is here
https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/H_iSouCVTha9mEw9y5XO5Q/runs/0/artifacts/public/build/target.tar.bz2
more or less comparable GCC build is here
https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/NOUqVShcSMaJn5j3g5nEYg/runs/0/artifacts/public/build/target.tar.bz2
It also seems that profile streaming is slower in GCC build (which is important
since Firefox forks multiple times on startup and then when creating new tab
and that triggers profile data streamout).
>From gcc-bugs-return-661689-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 17:18:58 2019
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From: "mike.k at digitalcarbide dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/92712] New: Performance regression with assumed values
Date: Thu, 28 Nov 2019 17:18:00 -0000
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Bug ID: 92712
Summary: Performance regression with assumed values
Product: gcc
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The following code generates progressively worse code from GCC 7.5 to GCC 8.3
to GCC 9.1 (and trunk):
static void func_base(int t, const int v) {
int x = 0;
for (int i = 0; i < t; ++i) {
x += v;
}
volatile int d = x;
}
void func_default(int t, const int v) {
func_base(t, v);
}
void func_assumed(int t, const int v) {
if (t < 0) __builtin_unreachable();
func_base(t, v);
}
On GCC 7.5 (-O2):
func_default(int, int):
test edi, edi
jle .L3
imul edi, esi
mov DWORD PTR [rsp-4], edi
ret
.L3:
xor edi, edi
mov DWORD PTR [rsp-4], edi
ret
func_assumed(int, int):
imul edi, esi
mov DWORD PTR [rsp-4], edi
ret
On GCC 8.3 (-O2):
func_default(int, int):
test edi, edi
jle .L3
imul edi, esi
mov DWORD PTR [rsp-4], edi
ret
.L3:
xor edi, edi
mov DWORD PTR [rsp-4], edi
ret
func_assumed(int, int):
test edi, edi
je .L6
imul edi, esi
.L6:
mov DWORD PTR [rsp-4], edi
ret
On GCC 9.1 and trunk (-O2):
func_default(int, int):
test edi, edi
jle .L3
sub edi, 1
imul edi, esi
add esi, edi
mov DWORD PTR [rsp-4], esi
ret
.L3:
xor esi, esi
mov DWORD PTR [rsp-4], esi
ret
func_assumed(int, int):
test edi, edi
je .L6
sub edi, 1
imul edi, esi
add edi, esi
.L6:
mov DWORD PTR [rsp-4], edi
ret
This occurs regardless of if `func_base` is allowed to inline, or if it is
manually inlined.
It does not occur in LLVM-Clang or in Microsoft Visual C++.
>From gcc-bugs-return-661690-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 17:21:17 2019
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Subject: [Bug tree-optimization/92711] GCC 10 libxul.so -fprofile-generate binary is 360MB while clang needs only 163MB.
Date: Thu, 28 Nov 2019 17:21:00 -0000
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--- Comment #1 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/ObkoHsHHSriQdU0Twc12Wg/runs/0/artifacts/public/build/target.tar.bz2
This is GCC9 build. 310MB, so still a lot bigger than clang, but better than
gcc10.
>From gcc-bugs-return-661691-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 17:25:43 2019
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From: "rsandifo at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/92190] [10 Regression] ICE in sp_valid_at, at config/i386/i386.c:6162 since r276648
Date: Thu, 28 Nov 2019 17:25:00 -0000
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--- Comment #12 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
Sorry, I was wrong in comment 10. I'd forgotten that the original
point of all this was that, without the clobber, -fipa-ra would
assume that the register isn't clobbered at all. The RA could
then try to keep even a 256-bit value across a call. Something
has to indicate that at least the upper bits of the register are
clobbered.
The choice of which registers we save and which we don't should
be final after RA. So if we're trying to recompute that set
later then perhaps the fix is to stop doing that.
(In reply to Jakub Jelinek from comment #11)
> Is CLOBBER the right representation of what vzeroupper does anyway?
> I mean, for AVX512F+, shouldn't it be
> (set (reg:V8DI xmm0) (vec_merge:V8DI (reg:V8DI xmm0) (const_vector:V8DI 0)
> (const_int 3)))
> ...
> and similarly for AVX/AVX2 (in that case V4DI instead of V8DI)?
We use clobbers for registers that aren't live at that point and
sets for registers that are. Using sets unconditionally makes
the register live on input and so leaves them upwards-exposed.
>From gcc-bugs-return-661692-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 17:35:41 2019
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Subject: [Bug tree-optimization/92711] GCC 10 libxul.so -fprofile-generate binary is 360MB while clang needs only 163MB.
Date: Thu, 28 Nov 2019 17:35:00 -0000
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Jan Hubicka <hubicka at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mliska at suse dot cz
Blocks| |45375
--- Comment #2 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Actually what I thought is GCC9 build is actually GCC10 build. Seems that
today profile fixes made the binary noticeably smaller which seems promising.
But it is still very large.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=45375
[Bug 45375] [meta-bug] Issues with building Mozilla (i.e. Firefox) with LTO
>From gcc-bugs-return-661693-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 17:58:18 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/88335] Implement P1073R3, C++20 immediate functions (consteval).
Date: Thu, 28 Nov 2019 17:58:00 -0000
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--- Comment #14 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I think we should remove the __cpp_consteval define until we implement virtual
consteval and should also mention in cxx-status.html that it is only partially
implemented.
I've tried to play with the virtual consteval support, but am stuck.
First, some testcases I've been playing with:
One for diagnostics:
struct S {
virtual int foo () { return 42; } // { dg-message "overridden
function is 'virtual consteval int S::foo\\\(\\\)'" }
consteval virtual int bar () { return 43; } // { dg-message "overridden
function is 'virtual consteval int S::bar\\\(\\\)'" }
};
struct T : public S {
int bar () { return 44; } // { dg-error "non-'consteval' function
'virtual int T::bar\\\(\\\)' overriding 'consteval' function" }
};
struct U : public S {
consteval virtual int foo () { return 45; } // { dg-error "'consteval'
function 'virtual consteval int U::foo\\\(\\\)' overriding non-'consteval'
function" }
};
And the main one:
struct S {
constexpr S () : s (0) {}
virtual int foo () const { return 42; }
consteval virtual int bar () const { return 43; }
consteval virtual int baz () const { return 44; }
int s;
};
struct T : public S {
constexpr T () : t (0) {}
consteval int bar () const { return 45; }
consteval virtual int baz () const { return 46; }
int t;
};
struct U : public T {
typedef int bar;
typedef int baz;
};
consteval int
foo ()
{
S s;
T t;
U u;
S *v = (S *) &t;
S *w = (S *) &u;
if (s.bar () != 43) throw 1;
if (s.baz () != 44) throw 2;
if (t.bar () != 45) throw 3;
if (t.baz () != 46) throw 4;
if (v->bar () != 45) throw 5;
if (v->baz () != 46) throw 6;
if (w->bar () != 45) throw 7;
if (w->baz () != 46) throw 8;
if (t.S::bar () != 43) throw 9;
if (t.T::baz () != 46) throw 10;
if (v->S::bar () != 43) throw 11;
if (w->S::baz () != 44) throw 12;
return 0;
}
constexpr S s;
constexpr T t;
constexpr const S *
bar (bool x)
{
return x ? &s : (const S *) &t;
}
int a = foo ();
int b = bar (false)->bar ();
int c = bar (true)->baz ();
static_assert (bar (false)->bar () == 45);
static_assert (bar (true)->baz () == 44);
Now, the issues:
1) (so far ignored); the standard says that classes where all virtual members
are immediate are still polymorphic,
but I guess for the ABI we don't want a vtable pointer there. So, I think
we want TYPE_POLYMORPHIC_P set on
those, but e.g. TYPE_CONTAINS_VPTR_P probably shouldn't be true for them; do
we want TYPE_REALLY_POLYMORPHIC_P or
similar for polymorphic types that contain at least one non-immediate
virtual function and thus need a vtable?
2) initially I thought I'd just always emit a direct call to the immediate
virtual method found by lookup and do the
remapping of that during constexpr call evaluation; unfortunately as the
v->S::bar () etc. calls show, we only want
to do that if LOOKUP_NONVIRTUAL wasn't set; unfortunately, when immediate
functions aren't in the binfo structures,
DECL_VINDEX is error_mark_node and so I think we need some hack how to
preserve the info that we are going to
call a virtual consteval method; could we e.g. abuse OBJ_TYPE_REF with
different arguments that would make it
clear it is something different, or new tree? We need to store the instance
on which it is called and the virtual
consteval method originally chosen e.g. to compare the type
3) I'm afraid one can't use a lookup_member on the actual instance type,
because it could find all kinds of things,
static member functions, typedefs, data members etc. in derived classes,
where we actually are only interested in
in virtual methods. So, shall we use something like look_for_overrides
does, except with the fndecl from the
base rather than derived and of course don't do anything except return the
first found method (and ignore static member
functions rather than handling them)?
4) guess covariant returns need to be handled at the end too somehow
Current WIP patch (though as mentioned in 2), in build_over_call we probably
just need some way note that it needs to be a virtual consteval call and
evaluate that only during constexpr evaluation):
--- gcc/cp/call.c.jj 2019-11-28 09:02:26.953819534 +0100
+++ gcc/cp/call.c 2019-11-28 18:18:31.646444362 +0100
@@ -8369,6 +8369,7 @@ build_over_call (struct z_candidate *can
current_function_returns_abnormally = 1;
if (TREE_CODE (fn) == FUNCTION_DECL
&& DECL_IMMEDIATE_FUNCTION_P (fn)
+ && !DECL_VINDEX (fn)
&& (current_function_decl == NULL_TREE
|| !DECL_IMMEDIATE_FUNCTION_P (current_function_decl))
&& (current_binding_level->kind != sk_function_parms
@@ -8962,7 +8963,40 @@ build_over_call (struct z_candidate *can
&& DECL_BUILT_IN_CLASS (fn) == BUILT_IN_NORMAL)
maybe_warn_class_memaccess (input_location, fn, args);
- if (DECL_VINDEX (fn) && (flags & LOOKUP_NONVIRTUAL) == 0)
+ if (!DECL_VINDEX (fn)
+ || (flags & LOOKUP_NONVIRTUAL) != 0)
+ {
+ fn = build_addr_func (fn, complain);
+ if (fn == error_mark_node)
+ return error_mark_node;
+ }
+ else if (DECL_IMMEDIATE_FUNCTION_P (fn))
+ {
+ tree obj = cxx_constant_value (argarray[0]);
+ if (obj == error_mark_node)
+ return error_mark_node;
+ STRIP_NOPS (obj);
+ if (TREE_CODE (obj) != ADDR_EXPR
+ || !DECL_P (get_base_address (TREE_OPERAND (obj, 0))))
+ {
+ if (complain & tf_error)
+ error ("invalid call to %<consteval%> %<virtual%> function %qD",
+ fn);
+ return error_mark_node;
+ }
+ obj = TREE_OPERAND (obj, 0);
+ while (TREE_CODE (obj) == COMPONENT_REF
+ && DECL_FIELD_IS_BASE (TREE_OPERAND (obj, 1)))
+ obj = TREE_OPERAND (obj, 0);
+ tree objtype = TREE_TYPE (obj);
+/* FIXME: I think we can't use lookup_member, as the virtual fn could be
+ hidden by types/data members etc. in derived classes.
+ tree member = lookup_member (objtype, DECL_NAME (fn), 0, */
+ fn = build_addr_func (fn, complain);
+ if (fn == error_mark_node)
+ return error_mark_node;
+ }
+ else
{
tree t;
tree binfo = lookup_base (TREE_TYPE (TREE_TYPE (argarray[0])),
@@ -8978,12 +9012,6 @@ build_over_call (struct z_candidate *can
fn = build_vfn_ref (argarray[0], DECL_VINDEX (fn));
TREE_TYPE (fn) = t;
}
- else
- {
- fn = build_addr_func (fn, complain);
- if (fn == error_mark_node)
- return error_mark_node;
- }
tree call = build_cxx_call (fn, nargs, argarray, complain|decltype_flag);
if (call == error_mark_node)
--- gcc/cp/class.c.jj 2019-11-26 22:56:37.862289986 +0100
+++ gcc/cp/class.c 2019-11-28 15:18:26.222237721 +0100
@@ -6002,7 +6002,9 @@ create_vtable_ptr (tree t, tree* virtual
/* Collect the virtual functions declared in T. */
for (fn = TYPE_FIELDS (t); fn; fn = DECL_CHAIN (fn))
if (TREE_CODE (fn) == FUNCTION_DECL
- && DECL_VINDEX (fn) && !DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P (fn)
+ && DECL_VINDEX (fn)
+ && !DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P (fn)
+ && !DECL_IMMEDIATE_FUNCTION_P (fn)
&& TREE_CODE (DECL_VINDEX (fn)) != INTEGER_CST)
{
tree new_virtual = make_node (TREE_LIST);
--- gcc/cp/search.c.jj 2019-10-10 01:33:38.286941969 +0200
+++ gcc/cp/search.c 2019-11-28 15:53:17.919926566 +0100
@@ -1972,20 +1972,13 @@ check_final_overrider (tree overrider, t
/* OK */;
else
{
+ auto_diagnostic_group d;
if (fail == 1)
- {
- auto_diagnostic_group d;
- error ("invalid covariant return type for %q+#D", overrider);
- inform (DECL_SOURCE_LOCATION (basefn),
- "overridden function is %q#D", basefn);
- }
+ error ("invalid covariant return type for %q+#D", overrider);
else
- {
- auto_diagnostic_group d;
- error ("conflicting return type specified for %q+#D", overrider);
- inform (DECL_SOURCE_LOCATION (basefn),
- "overridden function is %q#D", basefn);
- }
+ error ("conflicting return type specified for %q+#D", overrider);
+ inform (DECL_SOURCE_LOCATION (basefn),
+ "overridden function is %q#D", basefn);
DECL_INVALID_OVERRIDER_P (overrider) = 1;
return 0;
}
@@ -2006,6 +1999,22 @@ check_final_overrider (tree overrider, t
DECL_INVALID_OVERRIDER_P (overrider) = 1;
return 0;
}
+
+ if (DECL_IMMEDIATE_FUNCTION_P (overrider)
+ != DECL_IMMEDIATE_FUNCTION_P (basefn))
+ {
+ auto_diagnostic_group d;
+ if (DECL_IMMEDIATE_FUNCTION_P (overrider))
+ error ("%<consteval%> function %q+D overriding non-%<consteval%> "
+ "function", overrider);
+ else
+ error ("non-%<consteval%> function %q+D overriding %<consteval%> "
+ "function", overrider);
+ inform (DECL_SOURCE_LOCATION (basefn),
+ "overridden function is %qD", basefn);
+ DECL_INVALID_OVERRIDER_P (overrider) = 1;
+ return 0;
+ }
/* A function declared transaction_safe_dynamic that overrides a function
declared transaction_safe (but not transaction_safe_dynamic) is
--- gcc/cp/decl.c.jj 2019-11-28 13:09:24.748799556 +0100
+++ gcc/cp/decl.c 2019-11-28 15:31:20.675276991 +0100
@@ -9384,15 +9384,6 @@ grokfndecl (tree ctype,
}
}
- /* FIXME: For now. */
- if (virtualp && (inlinep & 8) != 0)
- {
- sorry_at (DECL_SOURCE_LOCATION (decl),
- "%<virtual%> %<consteval%> method %qD not supported yet",
- decl);
- inlinep &= ~8;
- }
-
/* If this decl has namespace scope, set that up. */
if (in_namespace)
set_decl_namespace (decl, in_namespace, friendp);
>From gcc-bugs-return-661694-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 18:04:01 2019
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From: "doko at debian dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/92713] New: ICE in libsupc++ building an offload compiler targeting amdgcn-unknown-amdhsa
Date: Thu, 28 Nov 2019 18:04:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92713
Bug ID: 92713
Summary: ICE in libsupc++ building an offload compiler
targeting amdgcn-unknown-amdhsa
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
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seen with trunk 20191128, building an offload compiler targeting
amdgcn-unknown-amdhsa:
during RTL pass: jump
error: Segmentation fault
731 | }
| ^
0xb1ef1f crash_signal
../../src/gcc/toplev.c:328
0x7fb91d05b0ff ???
/build/glibc-suXNNi/glibc-2.29/signal/../sysdeps/unix/sysv/linux/x86_64/sigaction.c:0
0xfc40fc count_reg_usage
../../src/gcc/cse.c:6838
0xfc4024 count_reg_usage
../../src/gcc/cse.c:6879
0xfc947b delete_trivially_dead_insns(rtx_insn*, int)
../../src/gcc/cse.c:7104
0xfa5026 execute
../../src/gcc/cfgcleanup.c:3268
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
The bug is not reproducible, so it is likely a hardware or OS problem.
make[6]: *** [Makefile:761: eh_personality.lo] Error 1
it's reproducible, but failing to build a preprocessed source on retry.
>From gcc-bugs-return-661695-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 18:08:46 2019
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From: "rsandifo at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/92677] [10 Regression] ICE in get_group_load_store_type, at tree-vect-stmts.c:2261 since r271704
Date: Thu, 28 Nov 2019 18:08:00 -0000
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rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |rsandifo at gcc dot gnu.org
--- Comment #1 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
Testing a patch.
>From gcc-bugs-return-661696-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 18:33:56 2019
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From: "jvdelisle at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libfortran/90374] Fortran 2018: Support d0.d, e0.d, es0.d, en0.d, g0.d and ew.d e0 edit descriptors for output
Date: Thu, 28 Nov 2019 18:33:00 -0000
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--- Comment #5 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Author: jvdelisle
Date: Thu Nov 28 18:33:20 2019
New Revision: 278817
URL: https://gcc.gnu.org/viewcvs?rev=278817&root=gcc&view=rev
Log:
PR fortran/90374
* io.c (check_format): Allow zero width expoenent with e0.
* io/format.c (parse_format_list): Relax format checking to allow
e0 exponent specifier.
* gfortran.dg/fmt_zero_width.f90: Update test.
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/io.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gfortran.dg/fmt_zero_width.f90
trunk/libgfortran/ChangeLog
trunk/libgfortran/io/format.c
trunk/libgfortran/io/write_float.def
>From gcc-bugs-return-661698-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 18:39:32 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/92711] GCC 10 libxul.so -fprofile-generate binary is 360MB while clang needs only 163MB.
Date: Thu, 28 Nov 2019 18:39:00 -0000
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--- Comment #3 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Proper GCC 9 -fprofile-generate build is 296MB
https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/aMGsffWPQ1qzjgj4LIqcwQ/runs/0/artifacts/public/build/target.tar.bz2
So about 5% regression compared to gcc9
>From gcc-bugs-return-661697-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 18:39:13 2019
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From: "lassie.darkorbit at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/92714] New: [missed-optimization] aggregate initialization of an array fills the whole array with zeros first, including non-zero elements
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Bug ID: 92714
Summary: [missed-optimization] aggregate initialization of an
array fills the whole array with zeros first,
including non-zero elements
Product: gcc
Version: 8.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: lassie.darkorbit at gmail dot com
Target Milestone: ---
void *sink;
void bar() {
int a[100]{1,2,3,4};
sink = a; // a escapes the function
asm("":::"memory"); // and compiler memory barrier
// forces the compiler to materialize a[] in memory instead of optimizing
away
}
gcc 8.1 and gcc 9.2 both make asm like this (even with -O3):
bar():
push edi # save call-preserved EDI which rep stos
uses
xor eax, eax # eax=0
mov ecx, 100 # repeat-count = 100
sub esp, 400 # reserve 400 bytes on the stack
mov edi, esp # dst for rep stos
mov DWORD PTR sink, esp # sink = a
rep stosd # memset(a, 0, 400)
mov DWORD PTR [esp], 1 # then store the non-zero initializers
mov DWORD PTR [esp+4], 2 # over the zeroed part of the array
mov DWORD PTR [esp+8], 3
mov DWORD PTR [esp+12], 4
add esp, 400 # cleanup the stack
pop edi # and restore caller's EDI
ret
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From: "frankhb1989 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/89640] [9 Regression] g++ chokes on lambda with __attribute__
Date: Thu, 28 Nov 2019 18:53:00 -0000
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--- Comment #9 from frankhb1989 at gmail dot com ---
This seems still problematic.
void test1() {
[]() __attribute__((noreturn)) noexcept [[]] -> int{
return 0; // Warning expected.
}();
}
void test2() {
[]() noexcept [[]] __attribute__((noreturn)) -> int{
return 0; // Warning expected.
}();
}
Clang++ 9 accepts test1 but not test2. (However, it issues an error instead of
a warning.) Both fail in trunk G++.
Are they expected work?
>From gcc-bugs-return-661699-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 18:53:00 2019
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From: "rafael at espindo dot la" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/91997] pretty printers: The __node_type type alias in _Hashtable is not available
Date: Thu, 28 Nov 2019 18:53:00 -0000
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--- Comment #3 from Rafael Avila de Espindola <rafael at espindo dot la> ---
(In reply to Jonathan Wakely from comment #2)
> Rafael, I'm unable to reproduce this with unordered containers. Do you have
> a testcase?
I was able to reproduce it with 2 files:
$ cat test.cc
#include <unordered_map>
void foo(std::unordered_map<int, int> &map);
int main() {
std::unordered_map<int, int> map;
map[42] = 1;
foo(map);
return 0;
}
$ cat test2.cc
#include <unordered_map>
#include <stdio.h>
void foo(std::unordered_map<int, int> &map) {
auto it = map.begin();
printf("%d\n", *it);
}
$ g++ test.cc test2.cc -o t -g
$ /usr/bin/gdb -q -ex "b printf" -ex r -ex bt ./t
Reading symbols from ./t...
Breakpoint 1 at 0x204b10
Starting program: /home/espindola/scylla/t
warning: Loadable section ".note.gnu.property" outside of ELF segments
warning: Loadable section ".note.gnu.property" outside of ELF segments
warning: Loadable section ".note.gnu.property" outside of ELF segments
Breakpoint 1, __printf (format=0x20081b "%d\n") at printf.c:28
28 {
#0 __printf (format=0x20081b "%d\n") at printf.c:28
#1 0x000000000020494a in foo (Traceback (most recent call last):
File "/lib64/../share/gcc-9/python/libstdcxx/v6/printers.py", line 957, in
children
data = self.flatten (imap (self.format_one, StdHashtableIterator
(self.hashtable())))
File "/lib64/../share/gcc-9/python/libstdcxx/v6/printers.py", line 880, in
__init__
self.node_type = find_type(hash.type, '__node_type').pointer()
File "/lib64/../share/gcc-9/python/libstdcxx/v6/printers.py", line 97, in
find_type
field = typ.fields()[0]
IndexError: list index out of range
map=
std::unordered_map with 1 element) at test2.cc:5
#2 0x0000000000203017 in main () at test.cc:6
>From gcc-bugs-return-661701-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 19:37:30 2019
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Subject: =?UTF-8?B?W0J1ZyBjKysvOTI3MTVdIE5ldzogZXJyb3I6IHBvc2l0aW9uIHBsdXMgc2l6?= =?UTF-8?B?ZSBleGNlZWRzIHNpemUgb2YgcmVmZXJlbmNlZCBvYmplY3QgaW4gIOKAmGJp?= =?UTF-8?B?dF9maWVsZF9yZWbigJk=?Date: Thu, 28 Nov 2019 19:37:00 -0000
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Bug ID: 92715
Summary: error: position plus size exceeds size of referenced
object in ‘bit_field_ref’
Product: gcc
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Created attachment 47390
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47390&action=edit
gzipped C++ source code
For the attached C++ source code, compiled by recent gcc trunk
and compiler flag -O3 -march=native, does this:
/home/dcb/gcc/results.278750/bin/g++
/home/dcb/gcc/results.278800/bin/g++
/home/dcb30/rpmbuild/BUILD/ompl-1.3.2-Source/src/ompl/geometric/planners/rrt/src
/VFRRT.cpp: In member function ‘Eigen::VectorXd
ompl::geometric::VFRRT::getNewDi
rection(const ompl::base::State*, const ompl::base::State*)’:
/home/dcb30/rpmbuild/BUILD/ompl-1.3.2-Source/src/ompl/geometric/planners/rrt/src
/VFRRT.cpp:93:17: error: position plus size exceeds size of referenced object
in
‘bit_field_ref’
93 | Eigen::VectorXd ompl::geometric::VFRRT::getNewDirection(const
base::Stat
e *qnear, const base::State *qrand)
| ^~~~
_69 = BIT_FIELD_REF <_67, 256, 0>;
during GIMPLE pass: forwprop
/home/dcb30/rpmbuild/BUILD/ompl-1.3.2-Source/src/ompl/geometric/planners/rrt/src
/VFRRT.cpp:93:17: internal compiler error: verify_gimple failed
0x1155fc9 verify_gimple_in_cfg(function*, bool)
../../trunk/gcc/tree-cfg.c:5445
0x1004a5f execute_function_todo
../../trunk/gcc/passes.c:1983
0x1005e11 do_per_function
../../trunk/gcc/passes.c:1638
0x1005e11 execute_todo
../../trunk/gcc/passes.c:2037
The bug seems to start sometime between revision 278750 and 278800.
/proc/cpuinfo says:
cpu family : 21
model : 2
model name : AMD FX(tm)-8350 Eight-Core Processor
stepping : 0
I'll have my usual go at reducing the code.
>From gcc-bugs-return-661702-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 19:45:53 2019
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Subject: [Bug bootstrap/92709] Cross Compilation failed for Latest GCC riscv64-linux-gnu on Linux/WSL2
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Keywords|accepts-invalid |build
Target| |riscv64-linux-gnu
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2019-11-28
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Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
The actual error is missing from the log.
>From gcc-bugs-return-661703-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 19:46:42 2019
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Subject: [Bug bootstrap/92709] Cross Compilation failed for Latest GCC riscv64-linux-gnu on Linux/WSL2
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--- Comment #2 from fdlbxtqi <euloanty at live dot com> ---
(In reply to Richard Biener from comment #1)
> The actual error is missing from the log.
Yea. It has no actual error. I have checked that.
>From gcc-bugs-return-661704-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 19:47:31 2019
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Subject: [Bug tree-optimization/92711] GCC 10 libxul.so -fprofile-generate binary is 360MB while clang needs only 163MB.
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Keywords| |missed-optimization
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Less early inlining causes more instrumentation? You'd see the same for
tramp3d I guess.
>From gcc-bugs-return-661705-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 19:48:57 2019
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Subject: [Bug libfortran/90374] Fortran 2018: Support d0.d, e0.d, es0.d, en0.d, g0.d and ew.d e0 edit descriptors for output
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CC| |anlauf at gcc dot gnu.org
--- Comment #6 from anlauf at gcc dot gnu.org ---
(In reply to Jerry DeLisle from comment #5)
> Author: jvdelisle
> Date: Thu Nov 28 18:33:20 2019
> New Revision: 278817
Jerry,
your change to format.c generates a warning here:
../../../trunk/libgfortran/io/format.c: In function 'parse_format_list':
../../../trunk/libgfortran/io/format.c:1029:7: warning: suggest explicit braces
to avoid am
biguous 'else' [-Wdangling-else]
1029 | if (t != FMT_POSINT)
| ^
Looking at the context:
t = format_lex (fmt);
if (t != FMT_POSINT)
if (t == FMT_ZERO)
{
this seems to make sense (to me). Do you plan to add {}?
>From gcc-bugs-return-661706-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 19:53:11 2019
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Subject: [Bug rtl-optimization/92712] [8/9/10 Regression] Performance regression with assumed values
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92712
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Known to work| |7.5.0
Keywords| |missed-optimization
Last reconfirmed| |2019-11-28
CC| |rguenth at gcc dot gnu.org
Ever confirmed|0 |1
Summary|Performance regression with |[8/9/10 Regression]
|assumed values |Performance regression with
| |assumed values
Target Milestone|--- |8.4
Known to fail| |9.2.0
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
This is final value replacement becoming more correct wrt undefined overflow I
guess.
final value replacement:
x_6 = PHI <x_5(3)>
with expr: (const int) ((unsigned int) t_1(D) + 4294967295) * v_3(D) + v_3(D)
final stmt:
x_6 = _14 + v_3(D);
Here we fail to optimize (t - 1)*v + v to t * v. Not sure how the t >= 0
assert helped but we likely get rid of that earlier and earlier.
>From gcc-bugs-return-661707-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 19:59:26 2019
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Subject: [Bug middle-end/92714] [missed-optimization] aggregate initialization of an array fills the whole array with zeros first, including leading non-zero elements
Date: Thu, 28 Nov 2019 19:59:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-11-28
CC| |law at gcc dot gnu.org
Summary|[missed-optimization] |[missed-optimization]
|aggregate initialization of |aggregate initialization of
|an array fills the whole |an array fills the whole
|array with zeros first, |array with zeros first,
|including non-zero elements |including leading non-zero
| |elements
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
It's actually an optimization - it's cheaper to clear the whole object if most
of it is zero. What we miss is to notice the special-case of only the tail
being zeros.
Jeff added memset pruning to DSE but this case has
<bb 2> [local count: 1073741824]:
a = {};
MEM <unsigned long> [(int *)&a] = 8589934593;
MEM <unsigned long> [(int *)&a + 8B] = 17179869187;
sink = &a;
the other obvious place to fix it is in the gimplifier of course which
creates the above code in the first place.
The same issue happens with
void *sink;
void bar() {
int a[100] = { [96]=1,2,3,4};
sink = a; // a escapes the function
asm("":::"memory"); // and compiler memory barrier
// forces the compiler to materialize a[] in memory instead of optimizing
away
}
or
void *sink;
void bar() {
int a[100] = { 1,2,3,4,[96]=1,2,3,4};
sink = a; // a escapes the function
asm("":::"memory"); // and compiler memory barrier
// forces the compiler to materialize a[] in memory instead of optimizing
away
}
though the trailing zeros are probably the most common case.
>From gcc-bugs-return-661708-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 20:00:40 2019
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Subject: [Bug target/92047] [10 regression] aarch64 regressions after r276645
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
I actually did. Is it fixed?
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |needs-reduction
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2019-11-28
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Target Milestone|--- |10.0
Summary|error: position plus size |[10 Regression] error:
|exceeds size of referenced |position plus size exceeds
|object in ‘bit_field_ref’ |size of referenced object
| |in ‘bit_field_ref’
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mine I'm sure. That CPU is bdver[234], right?
>From gcc-bugs-return-661710-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 20:18:53 2019
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Subject: [Bug libstdc++/91997] pretty printers: The __node_type type alias in _Hashtable is not available
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Thanks, I can confirm that error. Oddly, it works fine when printing the
variable within its own stack frame:
$ gdb -q -ex "br printf" -ex r -ex up -ex bt -ex down -ex bt -ex cont -ex q
map
Reading symbols from map...
Breakpoint 1 at 0x401030
Starting program: /tmp/map
Breakpoint 1, __printf (format=0x403007 "%d\n") at printf.c:28
28 {
#1 0x0000000000401272 in foo (map=std::unordered_map with 1 element = {...})
at map.cc:16
16 __builtin_printf("%d\n", *it);
#0 __printf (format=0x403007 "%d\n") at printf.c:28
#1 0x0000000000401272 in foo (map=std::unordered_map with 1 element = {...})
at map.cc:16
#2 0x0000000000401203 in main () at map.cc:9
#0 __printf (format=0x403007 "%d\n") at printf.c:28
28 {
#0 __printf (format=0x403007 "%d\n") at printf.c:28
#1 0x0000000000401272 in foo (Python Exception <class 'gdb.error'> No type
named std::__detail::_Hash_node<struct std::pair<int const, int>, false>.:
map=std::unordered_map with 1 element) at map.cc:16
#2 0x0000000000401203 in main () at map.cc:9
Continuing.
42
[Inferior 1 (process 679052) exited normally]
It fails when it's not at the top of the stack.
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--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #4)
> #1 0x0000000000401272 in foo (Python Exception <class 'gdb.error'> No type
> named std::__detail::_Hash_node<struct std::pair<int const, int>, false>.:
N.B. That's a different error because I'm testing a fix. Apparently it doesn't
fix it.
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |marxin at gcc dot gnu.org
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, I see the same for a polyhedron benchmark.
Started with r278758. I'm going to reduce the Fortran test-case.
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Subject: [Bug c/92716] New: -Os doesn't inline byteswap function even though it's a single instruction
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Bug ID: 92716
Summary: -Os doesn't inline byteswap function even though it's
a single instruction
Product: gcc
Version: 8.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: jwerner at chromium dot org
Target Milestone: ---
I compiled the following test code for both x86_64 and aarch64 on gcc 8.3.0:
static inline unsigned int byteswap(unsigned int x)
{
return (((x >> 24) & 0xff) << 0) |
(((x >> 16) & 0xff) << 8) |
(((x >> 8) & 0xff) << 16) |
(((x >> 0) & 0xff) << 24);
}
unsigned int test(unsigned int a, unsigned int b, unsigned int c) {
return byteswap(a) + byteswap(b) + byteswap(c);
}
On x86_64 I get:
0000000000000000 <byteswap> (File Offset: 0x40):
0: 89 f8 mov %edi,%eax
2: 0f c8 bswap %eax
4: c3 retq
0000000000000005 <test> (File Offset: 0x45):
5: e8 f6 ff ff ff callq 0 <byteswap> (File Offset: 0x40)
a: 89 f7 mov %esi,%edi
c: 89 c1 mov %eax,%ecx
e: e8 ed ff ff ff callq 0 <byteswap> (File Offset: 0x40)
13: 89 d7 mov %edx,%edi
15: 01 c1 add %eax,%ecx
17: e8 e4 ff ff ff callq 0 <byteswap> (File Offset: 0x40)
1c: 01 c8 add %ecx,%eax
1e: c3 retq
And on aarch64 I get:
0000000000000000 <byteswap> (File Offset: 0x40):
0: 5ac00800 rev w0, w0
4: d65f03c0 ret
0000000000000008 <test> (File Offset: 0x48):
8: a9bf7bfd stp x29, x30, [sp,#-16]!
c: 910003fd mov x29, sp
10: 97fffffc bl 0 <byteswap> (File Offset: 0x40)
14: 2a0003e3 mov w3, w0
18: 2a0103e0 mov w0, w1
1c: 97fffff9 bl 0 <byteswap> (File Offset: 0x40)
20: 0b000063 add w3, w3, w0
24: 2a0203e0 mov w0, w2
28: 97fffff6 bl 0 <byteswap> (File Offset: 0x40)
2c: 0b000060 add w0, w3, w0
30: a8c17bfd ldp x29, x30, [sp],#16
34: d65f03c0 ret
So the good news is that GCC recognized this code as a byteswap function that
can be implemented with a single instruction on both of these platforms. The
bad news is that it then doesn't seem to realize that inlining this single
instruction leads to smaller code size than wrapping it in a function and
calling it, even if it is called many times. If I instead compile with -O2, the
function is inlined as expected. (I also tried with clang 8.0.1 which manages
to inline correctly even with -Os.)
>From gcc-bugs-return-661714-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 20:32:06 2019
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--- Comment #3 from David Binderman <dcb314 at hotmail dot com> ---
(In reply to Richard Biener from comment #1)
> That CPU is bdver[234], right?
Not sure. Piledriver certainly.
I tried setting -march to each of bdver[234] and the problem still exists.
>From gcc-bugs-return-661715-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 20:42:28 2019
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Subject: [Bug c/92716] -Os doesn't inline byteswap function even though it's a single instruction
Date: Thu, 28 Nov 2019 20:42:00 -0000
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--- Comment #1 from Julius Werner <jwerner at chromium dot org> ---
edit: Just noticed that when I implement it as
static inline unsigned int byteswap(unsigned int x)
{
return __builtin_bswap32(x);
}
instead, it is still compiled into the same single instruction, but then the
inlining works even with -Os. So I guess the decision to inline is made too
early in the optimization pipeline or something?
>From gcc-bugs-return-661717-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 20:43:38 2019
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--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
Created attachment 47391
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47391&action=edit
Reduced test-case
Fails with:
$ gfortran -O3 -march=znver2 mdbx.f90
mdbx.f90:9:16:
9 | PARAMETER NM=16384
| 1
Warning: Legacy Extension: PARAMETER without '()' at (1)
mdbx.f90:12:18:
12 | DO j = 1,HD0 (i)
| 1
Warning: Deleted feature: End expression in DO loop at (1) must be integer
mdbx.f90:18:16:
18 | DO i = 1 , X0
| 1
Warning: Deleted feature: End expression in DO loop at (1) must be integer
mdbx.f90:7:0:
7 | SUBROUTINE MSTEP
|
Error: position plus size exceeds size of referenced object in ‘bit_field_ref’
_13 = BIT_FIELD_REF <_68, 256, 0>;
during GIMPLE pass: forwprop
mdbx.f90:7:0: internal compiler error: verify_gimple failed
0xe9f031 verify_gimple_in_cfg(function*, bool)
/home/marxin/Programming/gcc/gcc/tree-cfg.c:5445
0xd7a3ef execute_function_todo
/home/marxin/Programming/gcc/gcc/passes.c:1983
0xd7b19e execute_todo
/home/marxin/Programming/gcc/gcc/passes.c:2037
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
>From gcc-bugs-return-661716-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 20:43:38 2019
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Subject: [Bug c/92716] -Os doesn't inline byteswap function even though it's a single instruction
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--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Most likely what is happening is the following:
inlining happens twice but the detection of bswap does not happen until after
both inlining so the cost huestric for byteswap function is high.
>From gcc-bugs-return-661718-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 20:44:52 2019
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Subject: [Bug tree-optimization/92716] -Os doesn't inline byteswap function even though it's a single instruction
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--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
>So I guess the decision to inline is made too early in the optimization pipeline or something?
Or not optimizations before the second inliner.
>From gcc-bugs-return-661719-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 20:50:40 2019
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Subject: [Bug c++/92717] New: precompiled headers non-deterministic
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Bug ID: 92717
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I found that introducing precompiled headers to my project causes ccache
lookups to fail. I tracked it down to the gcc output not being deterministic:
# /usr/bin/c++ -x c++-header -include test.hxx -o test.hxx.gch -c test.hxx.cxx
&& md5sum test.hxx.gch
3a0efb998351939f4ed8efcfce1c0015 test.hxx.gch
# /usr/bin/c++ -x c++-header -include test.hxx -o test.hxx.gch -c test.hxx.cxx
&& md5sum test.hxx.gch
d295cbe3613100e6d989e62e3aafad6c test.hxx.gch
Both test.hxx and test.hxx.cxx are empty. The used gcc version is
9.2.1-9ubuntu2.
With clang (clang++ -cc1 test.hxx -emit-pch -o test.hxx.pch), the hashes match.
When compiling with save-temps, the ii and s files match.
As builds of regular C(++) files are deterministic (as expected), I suspect
that this might be a bug.
>From gcc-bugs-return-661722-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 20:57:50 2019
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Subject: [Bug ipa/92609] [10 Regression] ICE in warn_types_mismatch, at ipa-devirt.c:1000 since r265519
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----------------------------------------------------------------------------
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--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-661720-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 20:57:01 2019
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92609
--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Thu Nov 28 20:56:23 2019
New Revision: 278819
URL: https://gcc.gnu.org/viewcvs?rev=278819&root=gcc&view=rev
Log:
Properly use TYPE_MAIN_VARIANT in warn_types_mismatch.
2019-11-28 Martin Liska <mliska@suse.cz>
PR lto/92609
* ipa-devirt.c (warn_types_mismatch): Use TYPE_MAIN_VARIANT
consistently.
2019-11-28 Martin Liska <mliska@suse.cz>
PR lto/92609
* g++.dg/lto/pr92609_0.C: New test.
* g++.dg/lto/pr92609_1.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/lto/pr92609_0.C
trunk/gcc/testsuite/g++.dg/lto/pr92609_1.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/ipa-devirt.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug debug/46558] dbgcnt.c messages not marked for translation
Date: Thu, 28 Nov 2019 20:57:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=46558
--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Thu Nov 28 20:56:51 2019
New Revision: 278820
URL: https://gcc.gnu.org/viewcvs?rev=278820&root=gcc&view=rev
Log:
Translate header for -fdbg-cnt-list.
2019-11-28 Martin Liska <mliska@suse.cz>
PR debug/46558
* dbgcnt.c (dbg_cnt_list_all_counters): Mark table
headers for translation.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/dbgcnt.c
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #6 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug translation/40883] [meta-bug] Translation breakage with trivial fixes
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Bug 40883 depends on bug 46558, which changed state.
Bug 46558 Summary: dbgcnt.c messages not marked for translation
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=46558
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Subject: [Bug c++/92717] precompiled headers non-deterministic
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I don't think this is a bug, __DATE__ is one of the predefined macros and I
think it is included in GCC's precompiled headers.
Really ccache is broken anyways.
>As builds of regular C(++) files are deterministic (as expected)
Try using __DATE__ macro and you will see it is not :).
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Subject: [Bug c++/92717] precompiled headers non-deterministic
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--- Comment #2 from Markus Dreseler <gnu.org at mrks dot info> ---
> Try using __DATE__ macro and you will see it is not :).
Can't confirm:
# /usr/bin/c++ -D__DATE__=0 -D__TIMESTAMP__=0 -D__TIME__=0 -x c++-header
-include test.hxx -o test.hxx.gch -c test.hxx.cxx && md5sum test.hxx.gch
produces some new warnings, but again different file hashes.
Here are some other options that I have tested but that have no effect:
* SOURCE_DATE_EPOCH=0
* -fno-pie
* -nodefaultlibs -nostartfiles -nostdlib
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
By any chance, is your cc1plus built as PIE? PCH doesn't work in that case.
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--- Comment #4 from Markus Dreseler <gnu.org at mrks dot info> ---
> By any chance, is your cc1plus built as PIE? PCH doesn't work in that case.
I don't think so:
# file `find /usr -name cc1plus`
/usr/lib/gcc/x86_64-linux-gnu/9/cc1plus: ELF 64-bit LSB executable, x86-64,
version 1 (GNU/Linux), dynamically linked, interpreter
/lib64/ld-linux-x86-64.so.2,
BuildID[sha1]=ab2940b3dc6bbacbb2b3f15e7cdcdd416e74b3b8, for GNU/Linux 3.2.0,
stripped
This would say "LSB pie executable" otherwise, correct?
gcc 9.2.1 comes from the Ubuntu 19.10 repos.
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Subject: [Bug c/92718] New: Bogus Wstringop-overflow in __builtin_memset() of an element of array of size 1 of struct
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92718
Bug ID: 92718
Summary: Bogus Wstringop-overflow in __builtin_memset() of an
element of array of size 1 of struct
Product: gcc
Version: 8.3.0
Status: UNCONFIRMED
Severity: normal
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Reporter: rlibby at gmail dot com
Target Milestone: ---
Created attachment 47392
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47392&action=edit
Minimized test case
Gcc is emitting bogus, or maybe pessimistic, Wstringop-overflow or
Warray-bounds warnings (depending on warning flags).
$ cat min.c
struct s {
int x;
};
extern int n;
struct s a[1];
void
f(void)
{
struct s *ps;
int i;
for (i = 0; i < n; i++) {
ps = &a[i];
__builtin_memset(ps, 0, sizeof(*ps));
ps->x = 1;
}
}
$ /tmp/gcc/bin/bin/gcc -O -c min.c
min.c: In function ‘f’:
min.c:16:3: warning: ‘__builtin_memset’ writing 4 bytes into a region of size 0
overflows the destination [-Wstringop-overflow=]
16 | __builtin_memset(ps, 0, sizeof(*ps));
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
$ /tmp/gcc/bin/bin/gcc -Wall -O -c min.c
min.c: In function ‘f’:
min.c:16:3: warning: ‘__builtin_memset’ offset [4, 7] is out of the bounds [0,
4] of object ‘a’ with type ‘struct s[1]’ [-Warray-bounds]
16 | __builtin_memset(ps, 0, sizeof(*ps));
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
min.c:6:10: note: ‘a’ declared here
6 | struct s a[1];
| ^
My unprofessional opinion is that it seems like the compiler is emitting
a warning for when i >= 1, but the compiler does not know whether that
is actually possible. Note that a warning is not emitted if any of
these changes are made:
- The size of array "a" is changed from 1 to 2.
- A check of "n" against the array size is inserted:
if (n > 1)
return;
- The assignment of "x" after __builtin_memset() is deleted.
- The array of struct is changed to array of int.
The warning is emitted as -Wstringop-overflow with the default warning
options. In latest source, with -Wall, the warning is emitted as
Warray-bounds, but in previous versions (I checked 8.3.0) -Wall emits
Wstringop-overflow. I'm not sure when this aspect may have changed.
I have tested this case and seen a warning on:
- gcc 7.4.0
- gcc 8.3.0
- gcc current sources (r278812, "10.0.0")
I looked through the bugs linked to bug 88443 and was not immediately
able to identify this as a duplicate of one. Apologies if it is.
>From gcc-bugs-return-661730-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 21:40:58 2019
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Subject: [Bug c++/92717] precompiled headers non-deterministic
Date: Thu, 28 Nov 2019 21:40:00 -0000
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--- Comment #5 from Markus Dreseler <gnu.org at mrks dot info> ---
I took Andrew's __DATE__ suggestion as a reason to look at how much the files
actually differ. `cmp -l v1 v2 | wc -l` gives me 692634 differing bytes. This
sounds like the difference is bigger than just some macro values.
P.S.: Same issue on Mac with g++-8 (Homebrew GCC 8.2.0).
>From gcc-bugs-return-661733-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 21:55:33 2019
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Subject: [Bug tree-optimization/92716] -Os doesn't inline byteswap function even though it's a single instruction
Date: Thu, 28 Nov 2019 21:55:00 -0000
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--- Comment #4 from Marc Glisse <glisse at gcc dot gnu.org> ---
Yes, the pass that recognizes bswap (unsurprisingly called bswap) happens much
later than inlining in the pipeline. This kind of thing is unavoidable since
cycling through optimization passes is considered undesirable. In this
particular case, I don't know if there would be support for moving bswap, or
running it a second time, possibly just a restricted version if some parts are
less appropriate.
>From gcc-bugs-return-661731-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 21:55:11 2019
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Subject: [Bug middle-end/92718] Bogus Wstringop-overflow in __builtin_memset() of an element of array of size 1 of struct
Date: Thu, 28 Nov 2019 21:55:00 -0000
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r243419.
evrp is computing strange ranges, [0, 1] rather than just [0, 0] for the
iterator. It is true that &a[1] is still valid, but the memset with non-zero
size at that spot or MEM[(struct s *)&a][i_2].x = 1; for i_2 equal to 1 is
already UB.
Later on cunroll completely unrolls the loop based on that, into two
iterations, the first one contains both the memset and ps->x and the second one
just memset (which is UB too) and ps->x already replaced by
__builtin_unreachable.
The warning is then during expansion of that second iteration.
>From gcc-bugs-return-661732-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 21:55:33 2019
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Subject: [Bug middle-end/92718] [8/9/10 Regression] Bogus Wstringop-overflow in __builtin_memset() of an element of array of size 1 of struct
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-11-28
CC| |jakub at gcc dot gnu.org
Target Milestone|--- |8.4
Summary|Bogus Wstringop-overflow in |[8/9/10 Regression] Bogus
|__builtin_memset() of an |Wstringop-overflow in
|element of array of size 1 |__builtin_memset() of an
|of struct |element of array of size 1
| |of struct
Ever confirmed|0 |1
>From gcc-bugs-return-661734-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 22:02:42 2019
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Subject: [Bug c/92719] New: MacOS 10.15 Catalina build fails
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Bug ID: 92719
Summary: MacOS 10.15 Catalina build fails
Product: gcc
Version: 10.0
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Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
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Compiling gcc-trunk r278783M on MacOS Catalina (10.15.1) fails.
The configure -line (in an out-of-source-build):
OSX_SDK_VERSION=`xcodebuild -showsdks | grep 'macOS\ 10' | cut -f2- -d'-' | cut
-f2 -d' '`
OSX_SDK_PATH=`xcodebuild -sdk $OSX_SDK_VERSION -version | grep -E '^Path: ' |
cut -f2 -d' '`
../configure --prefix=$PWD/usr --enable-bootstrap
--enable-languages=c,c++,fortran,jit,lto --enable-host-shared --enable-multilib
--with-sysroot=$OSX_SDK_PATH --disable-werror
(please note, this is with & without --disable-werror)
In stage 2 it fails with:
/Users/hpcraink/DATA/SOFTWARE/gcc-svn/BUILD-MacOS-sysroot/./prev-gcc/xg++
-B/Users/hpcraink/DATA/SOFTWARE/gcc-svn/BUILD-MacOS-sysroot/./prev-gcc/
-B/Users/hpcraink/DATA/SOFTWARE/gcc-svn/BUILD-MacOS-sysroot/usr/x86_64-apple-darwin19.0.0/bin/
-nostdinc++
-B/Users/hpcraink/DATA/SOFTWARE/gcc-svn/BUILD-MacOS-sysroot/prev-x86_64-apple-darwin19.0.0/libstdc++-v3/src/.libs
-B/Users/hpcraink/DATA/SOFTWARE/gcc-svn/BUILD-MacOS-sysroot/prev-x86_64-apple-darwin19.0.0/libstdc++-v3/libsupc++/.libs
-I/Users/hpcraink/DATA/SOFTWARE/gcc-svn/BUILD-MacOS-sysroot/prev-x86_64-apple-darwin19.0.0/libstdc++-v3/include/x86_64-apple-darwin19.0.0
-I/Users/hpcraink/DATA/SOFTWARE/gcc-svn/BUILD-MacOS-sysroot/prev-x86_64-apple-darwin19.0.0/libstdc++-v3/include
-I/Users/hpcraink/DATA/SOFTWARE/gcc-svn/libstdc++-v3/libsupc++
-L/Users/hpcraink/DATA/SOFTWARE/gcc-svn/BUILD-MacOS-sysroot/prev-x86_64-apple-darwin19.0.0/libstdc++-v3/src/.libs
-L/Users/hpcraink/DATA/SOFTWARE/gcc-svn/BUILD-MacOS-sysroot/prev-x86_64-apple-darwin19.0.0/libstdc++-v3/libsupc++/.libs
-c -g -O2 -fno-checking -gtoggle -DIN_GCC -fPIC -fno-exceptions
-fno-rtti -fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings
-Wcast-qual -Wno-error=format-diag -Wmissing-format-attribute
-Woverloaded-virtual -pedantic -Wno-long-long -Wno-variadic-macros
-Wno-overlength-strings -fno-common -DHAVE_CONFIG_H -DGENERATOR_FILE -fno-PIE
-I. -Ibuild -I../../gcc -I../../gcc/build -I../../gcc/../include -I./../intl
-I../../gcc/../libcpp/include \
-o build/genmodes.o ../../gcc/genmodes.c
In file included from ./bconfig.h:3,
from ../../gcc/genmodes.c:20:
./auto-host.h:2405:16: error: declaration does not declare anything
[-fpermissive]
2405 | #define rlim_t long
| ^~~~
In file included from ../../gcc/genmodes.c:21:
../../gcc/system.h:540:20: error: conflicting declaration of C function ‘const
char* strsignal(int)’
540 | extern const char *strsignal (int);
| ^~~~~~~~~
In file included from
/Users/hpcraink/DATA/SOFTWARE/gcc-svn/BUILD-MacOS-sysroot/prev-x86_64-apple-darwin19.0.0/libstdc++-v3/include/cstring:42,
from ../../gcc/system.h:235,
from ../../gcc/genmodes.c:21:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/string.h:134:7:
note: previous declaration ‘char* strsignal(int)’
134 | char *strsignal(int __sig);
| ^~~~~~~~~
make[3]: *** [build/genmodes.o] Error 1
make[2]: *** [all-stage2-gcc] Error 2
make[1]: *** [stage2-bubble] Error 2
make: *** [all] Error 2
Please note gcc does bootstrap when configuring using --with-build-sysroot --
and fixing one header inclusion for gmp.h
However, Iain pointed to issues reported in
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89864
>From gcc-bugs-return-661735-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 22:08:06 2019
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Subject: [Bug rtl-optimization/92602] Failure in gcc.target/powerpc/bswap64-2.c
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Subject: [Bug target/92602] Failure in gcc.target/powerpc/bswap64-2.c
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--- Comment #6 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Author: segher
Date: Thu Nov 28 22:28:59 2019
New Revision: 278821
URL: https://gcc.gnu.org/viewcvs?rev=278821&root=gcc&view=rev
Log:
rs6000: Use memory_operand for all simple {l,st}*brx instructions
We run fwprop before combine, very early even in the case of fwprop1;
and fwprop1 will change memory addressing to what it considers cheaper.
After the "common" change, it now changes the indexed store instruction
in the testcase to be to a constant address. But that is not an
improvement at all: the byte reverse instructions only exist in the
indexed form, so they will not match anymore.
This patch changes the patterns for the byte reverse instructions to
allow plain memory_operand, letting reload fix this up.
PR target/92602
* config/rs6000/rs6000.md (bswap<mode>2_load for HSI): Change the
indexed_or_indirect_operand to be memory_operand.
(bswap<mode>2_store for HSI): Ditto.
(bswapdi2_load): Ditto.
(bswapdi2_store): Ditto.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/rs6000/rs6000.md
>From gcc-bugs-return-661737-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 22:32:33 2019
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
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--- Comment #7 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-661738-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 23:20:59 2019
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Subject: [Bug fortran/92350] Document non-standard namelist quote handling in gfortran
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--- Comment #3 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
(In reply to Tobias Burnus from comment #2)
> For the added text, cf. PR 60148 and
> https://gcc.gnu.org/ml/fortran/2014-03/msg00145.html
>
> I missed that patch when writing this PR because it wasn't posted to
> gcc-patches@ :-(
Sorry about that. So would you like this better documented? The whole situation
is unfortunate.
>From gcc-bugs-return-661739-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 29 01:30:47 2019
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Subject: [Bug target/92635] __builtin_finited{32,64,128} should inline
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--- Comment #2 from Segher Boessenkool <segher at gcc dot gnu.org> ---
This instruction can set multiple CR field bits at the same time. It is
tricky to handle that as flag output -- it needs a new CCmode either way!
>From gcc-bugs-return-661740-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 29 02:05:41 2019
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Subject: [Bug tree-optimization/91790] ICE: verify_ssa failed (error: definition in block 2 follows the use)
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--- Comment #14 from Kewen Lin <linkw at gcc dot gnu.org> ---
Yes, I'd like to wait for two weeks to ensure it's safe enough and then
backport to gcc9. Does it sound good?
>From gcc-bugs-return-661741-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 29 02:17:57 2019
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From: "dclarke at blastwave dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/92720] New: cc1 accepts #include /dev/stdin inline
Date: Fri, 29 Nov 2019 02:17:00 -0000
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Bug ID: 92720
Summary: cc1 accepts #include /dev/stdin inline
Product: gcc
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Strangely I see recent cc1 accept this :
/* echo '"hell"' | cc -o tmp tmp.c && ./tmp */
#include <stdio.h>
int main(void) {
printf("%s\n",
#include"/dev/stdin"
);
}
For example this is accepted :
$ echo '\042hello botfelk\\n\042' | gcc -m64 -std=iso9899:1999 \
> -pedantic -pedantic-errors -Wpedantic -fno-builtin -O0 -v \
> -o /tmp/botfelk /tmp/botfelk.c
That is considered acceptable whereas Oracle Studio 12.6 c99
clearly complains :
beta$ echo '\042hello botfelk\\n\042' | $CC $CFLAGS $CPPFLAGS -\# -H -o
/tmp/botfelk /tmp/botfelk.c
### c99: Note: NLSPATH =
/opt/developerstudio12.6/bin/../lib/locale/%L/LC_MESSAGES/%N.cat:/opt/developerstudio12.6/bin/../../lib/locale/%L/LC_MESSAGES/%N.cat
### c99: Note: TMPDIR = /var/tmp/dclarke
### command line files and options (expanded):
### -m64 -xarch=sparc -Xc -xdebuginfo=line,param,variable,tagtype,codetag,decl
-xglobalize=yes -xpatchpadding=fix -xkeep_unref=funcs,vars -mc -xs=yes
-errfmt=error -erroff=%none -errshort=full -errtags=yes -errwarn=%none
-ftrap=%none -xbuiltin=%none -xlibmieee -xstrconst -xcode=pic32 -xmemalign=8s
-xnolibmil -xunroll=1 -xregs=no%appl -xdebugformat=dwarf -I/usr/local/include
-D_POSIX_PTHREAD_SEMANTICS -D_LARGEFILE64_SOURCE -D_TS_ERRNO
-D_XOPEN_SOURCE=600 -# -H -o/tmp/botfelk /tmp/botfelk.c
/opt/developerstudio12.6/lib/compilers/bin/acomp -D_POSIX_PTHREAD_SEMANTICS
-D_LARGEFILE64_SOURCE -D_TS_ERRNO -D_XOPEN_SOURCE=600 -H -Qy -Xc -xc99=%all
-features=no%mergestrings,extinl,no%typeof,no%extensions,conststrings,no%zla,no%iddollar,no%gcc_enums
-i /tmp/botfelk.c -D__SunOS_5_10 -D__SunOS_RELEASE=0x051000 -D__SUNPRO_C=0x5150
-D__unix -D__SVR4__ -D__svr4__ -D__SVR4 -D__sun -D__sun__ -D__SunOS -D__sparcv9
-D__sparc_v9__ -D__sparc -D__sparc__ -D_LP64 -D__LP64__ -D__arch64__
-D__ORDER_LITTLE_ENDIAN__=1234 -D__ORDER_BIG_ENDIAN__=4321
-D__BYTE_ORDER__=__ORDER_BIG_ENDIAN__ -D__BUILTIN_VA_ARG_INCR -D__C99FEATURES__
-D__PRAGMA_REDEFINE_EXTNAME -D__FLT_EVAL_METHOD__=0 -D__SUN_PREFETCH
-I/usr/local/include -I-xbuiltin
-I/opt/developerstudio12.6/lib/compilers/include/cc -I/usr/xpg6/include
-I/usr/xpg4/include -2K -errfmt=error -erroff=%none -errshort=full
-errwarn=%none -errtags -xwarn_include_dir=permission -xbuiltin=%none -strconst
-fsimple=0 -m64 -fparam_ir -fparam_ir -xglobalize=yes
-xdebuginfo=line,param,variable,tagtype,codetag,decl -xkeep_unref=funcs,vars
-xF=%none -xdbggen=dwarf+usedonly+incl+line+param+variable+tagtype+codetag+decl
-xldscope=global -xivdep=loop -xanalyze=code -c99OS
"-g/opt/developerstudio12.6/bin/c99 -m64 -xarch=sparc -Xc -g -mc -xs
-errfmt=error -erroff=%none -errshort=full -errtags=yes -errwarn=%none
-ftrap=%none -xbuiltin=%none -xildoff -xlibmieee -xstrconst -xcode=pic32
-xmemalign=8s -xnolibmil -xunroll=1 -xregs=no%appl -xdebugformat=dwarf
-I/usr/local/include -D_POSIX_PTHREAD_SEMANTICS -D_LARGEFILE64_SOURCE
-D_TS_ERRNO -D_XOPEN_SOURCE='600' -H " -destination_ir=iropt -r
/var/tmp/dclarke/acomp.1574993356.16502.01.ir
/usr/include/stdio.h
/usr/include/sys/feature_tests.h
/usr/include/sys/ccompile.h
/usr/include/sys/isa_defs.h
/usr/include/iso/stdio_iso.h
/usr/include/sys/va_list.h
/usr/include/stdio_tag.h
/usr/include/stdio_impl.h
/usr/include/iso/stdio_c99.h
/dev/stdin
"/tmp/botfelk.c", line 8: error: syntax error before or at: )
c99: acomp failed for /tmp/botfelk.c
beta$
beta$
This may require a bit of a dive into the specifications however
an inline include of /dev/stdin seems wrong for some definition
of wrong.
--
Dennis Clarke
RISC-V/SPARC/PPC/ARM/CISC
UNIX and Linux spoken
GreyBeard and suspenders optional
>From gcc-bugs-return-661742-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 29 02:33:54 2019
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Subject: [Bug c/92720] cc1 accepts #include /dev/stdin inline
Date: Fri, 29 Nov 2019 02:33:00 -0000
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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> ---
GCC does not check the files.
>echo '\042hello botfelk\\n\042'
This one fails for me too:
In file included from t8.c:5:0:
/dev/stdin: In function ‘main’:
/dev/stdin:1:1: error: stray ‘\’ in program
/dev/stdin:1:2: error: invalid suffix "hello" on integer constant
/dev/stdin:1:11: error: expected ‘)’ before ‘botfelk’
/dev/stdin:1:18: error: stray ‘\’ in program
/dev/stdin:1:19: error: stray ‘\’ in program
/dev/stdin:1:21: error: stray ‘\’ in program
>From gcc-bugs-return-661743-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 29 02:39:10 2019
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Subject: [Bug c++/92721] New: ICE: canonical types differ for identical types 'int(void*, void*)' and 'int(void*, void*)'
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Bug ID: 92721
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Reporter: asolokha at gmx dot com
Target Milestone: ---
g++-10.0.0-alpha20191124 snapshot (r278660) ICEs when compiling the following
testcase reduced from gcc/testsuite/gcc.dg/attr-access-read-write-2.c:
int __attribute__ ((access (read_write, 1))) rdwr1_rdwr1 (void*, void*);
int rdwr1_rdwr1 (void*, void*);
% g++-10.0.0-alpha20191124 -c zyejqh4h.c
zyejqh4h.c:2:30: internal compiler error: canonical types differ for identical
types 'int(void*, void*)' and 'int(void*, void*)'
2 | int rdwr1_rdwr1 (void*, void*);
| ^
0x9fb63b comptypes(tree_node*, tree_node*, int)
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191124/work/gcc-10-20191124/gcc/cp/typeck.c:1509
0x89e863 duplicate_decls(tree_node*, tree_node*, bool)
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191124/work/gcc-10-20191124/gcc/cp/decl.c:2306
0x91962f do_pushdecl
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191124/work/gcc-10-20191124/gcc/cp/name-lookup.c:3042
0x91c39b pushdecl(tree_node*, bool)
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191124/work/gcc-10-20191124/gcc/cp/name-lookup.c:3171
0x91c39b maybe_push_decl(tree_node*)
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191124/work/gcc-10-20191124/gcc/cp/name-lookup.c:3202
0x8b426b start_decl(cp_declarator const*, cp_decl_specifier_seq*, int,
tree_node*, tree_node*, tree_node**)
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191124/work/gcc-10-20191124/gcc/cp/decl.c:5375
0x9576d5 cp_parser_init_declarator
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191124/work/gcc-10-20191124/gcc/cp/parser.c:20601
0x93aa52 cp_parser_simple_declaration
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191124/work/gcc-10-20191124/gcc/cp/parser.c:13624
0x9623c6 cp_parser_declaration
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191124/work/gcc-10-20191124/gcc/cp/parser.c:13322
0x9629e5 cp_parser_translation_unit
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191124/work/gcc-10-20191124/gcc/cp/parser.c:4721
0x9629e5 c_parse_file()
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191124/work/gcc-10-20191124/gcc/cp/parser.c:42966
0xa70fee c_common_parse_file()
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191124/work/gcc-10-20191124/gcc/c-family/c-opts.c:1185
>From gcc-bugs-return-661744-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 29 02:53:12 2019
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Subject: [Bug c++/92650] internal compiler error: canonical types differ for identical types
Date: Fri, 29 Nov 2019 02:53:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92650
Arseny Solokha <asolokha at gmx dot com> changed:
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----------------------------------------------------------------------------
CC| |asolokha at gmx dot com
--- Comment #2 from Arseny Solokha <asolokha at gmx dot com> ---
Created attachment 47393
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47393&action=edit
Preprocessed testcase
W/ -std=c++17 -fconcepts I get ICE in lazily_declare_fn instead, which looks
like a duplicate of PR92552 at first sight, and w/o -fconcepts I don't get any
ICE at all.
>From gcc-bugs-return-661745-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 29 06:54:09 2019
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From: "rafael at espindo dot la" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/92722] New: gcc considers "padding" byte of empty lambda to be uninitialized
Date: Fri, 29 Nov 2019 06:54:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92722
Bug ID: 92722
Summary: gcc considers "padding" byte of empty lambda to be
uninitialized
Product: gcc
Version: 9.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
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Created attachment 47394
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47394&action=edit
testcase
seastar has a variant of std::function that cannot be copied and is called
noncopyable_function. It also has a small buffer so that small functions don't
need an indirection.
The implementation is careful to only move sizeof(Func) bytes to avoid using
uninitialized memory. It looks like gcc is careful enough to consider padding
bytes to be initialized, but when given an empty lambda, sizeof(Func) is 1 but
no bytes are actually used and gcc ends up issuing a warning.
A reduced testcase is attached. Compiling with g++ -S failure_injector_test.ii
-O1 -Wall produces the warning:
failure_injector_test.ii:22:27: warning: ‘a.noncopyable_function::direct[0]’ is
used uninitialized in this function [-Wuninitialized]
This seems to be generated because
noncopyable_function(Func&& func) {
static_assert(sizeof(Func) == 1);
new (reinterpret_cast<Func*>(direct)) Func(std::move(func));
}
Doesn't initialize any bytes, but sizeof(Func) is 1, so trivial_direct_move
still uses direrct[0]
>From gcc-bugs-return-661746-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 29 07:10:59 2019
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Subject: [Bug c++/92717] precompiled headers non-deterministic
Date: Fri, 29 Nov 2019 07:10:00 -0000
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--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Well, pch files essentially contain a memory dump of GCCs internal state so I
very much expect differences for example when address-space randomization is
turned on.
>From gcc-bugs-return-661747-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 29 07:14:36 2019
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Subject: [Bug tree-optimization/92716] -Os doesn't inline byteswap function even though it's a single instruction
Date: Fri, 29 Nov 2019 07:14:00 -0000
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--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Probably similar cases can be made for loops implementing memcpy/memcmp (what
we pattern-detect in loop distribution).
>From gcc-bugs-return-661748-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 29 07:17:46 2019
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Subject: [Bug c++/92717] precompiled headers non-deterministic
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--- Comment #7 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #6)
> Well, pch files essentially contain a memory dump of GCCs internal state so
> I very much expect differences for example when address-space randomization
> is turned on.
I forgot about that issue too.
>From gcc-bugs-return-661749-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 29 07:22:11 2019
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Subject: [Bug c++/92722] gcc considers "padding" byte of empty lambda to be uninitialized
Date: Fri, 29 Nov 2019 07:22:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic,
| |missed-optimization
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-11-29
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
It clearly copies an uninitialized 'char'. The middle-end doesn't know this is
padding (or even what padding is), so you have to work around this in the C++
source somehow.
At least I cannot even see how the C++ FE could mark those accesses with
TREE_NO_WARNING because even the FE doesn't see we are accessing padding.
Maybe all std::copy/move/etc. should do nothing for "empty" types.
It's also a missed optimization of course.
>From gcc-bugs-return-661750-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 29 07:27:07 2019
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Subject: [Bug rtl-optimization/92176] LRA problem with reloads for subreg operands
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
I have also seen this on SPARC.
>From gcc-bugs-return-661751-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 29 08:04:54 2019
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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Subject: [Bug tree-optimization/92704] [8/9/10 Regression] ICE: Segmentation fault (in process_bb)
Date: Fri, 29 Nov 2019 08:05:00 -0000
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri Nov 29 08:05:03 2019
New Revision: 278828
URL: https://gcc.gnu.org/viewcvs?rev=278828&root=gcc&view=rev
Log:
2019-11-29 Richard Biener <rguenther@suse.de>
PR tree-optimization/92704
* tree-if-conv.c (combine_blocks): Deal with virtual PHIs
in loops performing only loads.
* gcc.dg/torture/pr92704.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr92704.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-if-conv.c
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Subject: [Bug tree-optimization/92704] [8/9 Regression] ICE: Segmentation fault (in process_bb)
Date: Fri, 29 Nov 2019 08:06:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |10.0
Summary|[8/9/10 Regression] ICE: |[8/9 Regression] ICE:
|Segmentation fault (in |Segmentation fault (in
|process_bb) |process_bb)
Known to fail|10.0 |
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed on trunk sofar.
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Subject: [Bug c++/92721] ICE: canonical types differ for identical types 'int(void*, void*)' and 'int(void*, void*)'
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2019-11-29
CC| |marxin at gcc dot gnu.org
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Target Milestone|--- |10.0
Ever confirmed|0 |1
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, started with r278624.
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Subject: [Bug middle-end/92723] New: ICE in expand_shift_1, at expmed.c:2635
Date: Fri, 29 Nov 2019 08:21:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92723
Bug ID: 92723
Summary: ICE in expand_shift_1, at expmed.c:2635
Product: gcc
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Created attachment 47395
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47395&action=edit
unreduced testcase
> ./cc1plus -quiet bitRotateRight.ii -I include -std=c++17 -O3
during RTL pass: expand
In file included from ../dbms/src/Functions/bitRotateRight.cpp:2:
../dbms/src/Functions/FunctionBinaryArithmetic.h: In static member function
?static void DB::BinaryOperationImplBase<A, B, Op,
ResultType_>::vector_constant(DB::PaddedPODArray<T>&, B,
DB::PaddedPODArray<ResultType_>&) [with A = unsigned char; B = long unsigned
int; Op = DB::BitRotateRightImpl<unsigned char, long unsigned int>; ResultType_
= long unsigned int]?:
../dbms/src/Functions/FunctionBinaryArithmetic.h:73:13: internal compiler
error: in expand_shift_1, at expmed.c:2635
0xca68f6 expand_shift_1
/space/rguenther/src/svn/gcc-9-branch/gcc/expmed.c:2635
0xca6a20 expand_variable_shift(tree_code, machine_mode, rtx_def*, tree_node*,
rtx_def*, int)
/space/rguenther/src/svn/gcc-9-branch/gcc/expmed.c:2677
0xcd4f9e expand_expr_real_2(separate_ops*, rtx_def*, machine_mode,
expand_modifier)
/space/rguenther/src/svn/gcc-9-branch/gcc/expr.c:9368
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Subject: [Bug c++/92654] [8/9/10 Regression] internal compiler error: in lookup_template_class_1
Date: Fri, 29 Nov 2019 08:23:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Keywords|ice-on-invalid-code |ice-on-valid-code
--- Comment #8 from Martin Liška <marxin at gcc dot gnu.org> ---
Ok, GCC newly received a support for __has_builtin, so one needs to
'#define a 0' always.
The ICE started with r259043, before that the code was rejected.
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Subject: [Bug target/92723] ICE in expand_shift_1, at expmed.c:2635
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code,
| |needs-reduction
Target| |aarch64-linux-gnu
CC| |rsandifo at gcc dot gnu.org
Component|middle-end |target
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
#1 0x0000000000ca68f7 in expand_shift_1 (code=RSHIFT_EXPR, mode=E_V2DImode,
shifted=0x7fffe01b2060, amount=0x7fffe01b34c8, target=0x0, unsignedp=1,
may_fail=false) at /space/rguenther/src/svn/gcc-9-branch/gcc/expmed.c:2635
2635 gcc_assert (temp != NULL_RTX || may_fail);
(gdb) p debug_rtx (shifted)
(reg:V2DI 135 [ vect__17.8770 ])
$1 = void
(gdb) p debug_rtx (amount)
(reg/v:DI 262 [ b ])
$2 = void
so there's a variable vector shift expanded from
vect_patt_26.8773_85 = vect__17.8770_77 >> b_8(D)
either a vectorizer or a target issue.
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Subject: [Bug c++/92654] [8/9/10 Regression] internal compiler error: in lookup_template_class_1
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--- Comment #9 from fiesh at zefix dot tv ---
(In reply to Martin Liška from comment #8)
> Ok, GCC newly received a support for __has_builtin, so one needs to
> '#define a 0' always.
> The ICE started with r259043, before that the code was rejected.
Or I guess just change it to `#ifdef __clang__`.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92717
--- Comment #8 from Markus Dreseler <gnu.org at mrks dot info> ---
Interesting. Is this implementation documented somewhere?
I can confirm that disabling ASLR results in reproducible gchs:
# setarch $(uname -m) -R /usr/bin/c++ -x c++-header -include test.hxx -o
test.hxx.gch -c test.hxx.cxx && md5sum test.hxx.gch
54486c6ffc08db87d4b58792dcb46091 test.hxx.gch
# setarch $(uname -m) -R /usr/bin/c++ -x c++-header -include test.hxx -o
test.hxx.gch -c test.hxx.cxx && md5sum test.hxx.gch
54486c6ffc08db87d4b58792dcb46091 test.hxx.gch
For CI builds of trusted files, this might be an option, but generally setting
the ADDR_NO_RANDOMIZE personality for gcc when gchs are build does not sound
like a good approach.
>From gcc-bugs-return-661760-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 29 08:53:09 2019
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Subject: [Bug target/92047] [10 regression] aarch64 regressions after r276645
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92047
Christophe Lyon <clyon at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #3 from Christophe Lyon <clyon at gcc dot gnu.org> ---
Looks like it's fixed: the last failure I saw was in r278272, and OK since at
least r278282.
Thanks.
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Subject: [Bug tree-optimization/91975] worse code for small array copy using pointer arithmetic than array indexing
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91975
Bug 91975 depends on bug 92047, which changed state.
Bug 92047 Summary: [10 regression] aarch64 regressions after r276645
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92047
What |Removed |Added
----------------------------------------------------------------------------
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Resolution|--- |FIXED
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From: Emily Jones <emily.jones@attendiesdatalists.com>
To: "gcc-bugs@gcc.gnu.org" <gcc-bugs@gcc.gnu.org>
Subject: The Trophex Show - Attendees Info List
Date: Fri, 29 Nov 2019 08:55:00 -0000
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Hi
Hope you are doing well.
We are following up to if you would be interested in the Attendees/Visitors List of
The Trophex Show
12 - 13 Jan 2020
NEC, Birmingham, UK
Counts = 7,640
our company provides the following details regarding your attendees: Title, Client Name, Email and Website, address, Phone number, Zip code & Cities.
If you are interested in the attendees list, let us know your thoughts so we will send you the discounted cost and additional information.
Regards,
Emily
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