* [Bug target/92140] clang vs gcc optimizing with adc/sbb
[not found] <bug-92140-4@http.gcc.gnu.org/bugzilla/>
@ 2019-10-19 19:09 ` segher at gcc dot gnu.org
2023-05-07 16:13 ` chfast at gmail dot com
2023-05-07 16:15 ` pinskia at gcc dot gnu.org
2 siblings, 0 replies; 3+ messages in thread
From: segher at gcc dot gnu.org @ 2019-10-19 19:09 UTC (permalink / raw)
To: gcc-bugs
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92140
--- Comment #29 from Segher Boessenkool <segher at gcc dot gnu.org> ---
(In reply to Uroš Bizjak from comment #27)
> FYI, these constraints were used in the past (when combine was allowed to
> propagate hard registers into combined insn) to prevent reload failures,
> where reload was not able to e.g. reload wrong hard reg in the place of
> count reg in the shift insn pattern to %ecx. Nowadays, constraints in the
> patterns of pre-reload insn_and_split are not necessary anymore, and can be
> removed together with ix86_legitimate_combined_insn target hook.
combine still propagates hard registers. The only thing it does not
combine is single-set register-register copies from a non-fixed hard
register; everything else with hard registers it still does, like if
the *destination* of the move is a hard reg (e.g., in the function
return value).
Does it help the i386 port if we disallow a hard reg dest as well?
RA should be able to handle that just fine as well.
This still will not get rid of *all* (non-fixed) hard registers, you
still can get them from explicit register variables, and target code
(or even generic code) can still put some in non-copies, which combine
will happily propagate further.
>From gcc-bugs-return-656937-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Oct 19 22:38:38 2019
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From: "segher at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/92113] [8 regression] r276673 causes segfault in gfortran.dg/pr51434.f90
Date: Sat, 19 Oct 2019 22:38:00 -0000
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--- Comment #3 from Segher Boessenkool <segher at gcc dot gnu.org> ---
I don't understand that Fortran code correctly, but it seems to me that
ARTIFICIAL code is the correct one, so you shouldn't have reverted this
patch, and that may just be a red herring even?
>From gcc-bugs-return-656938-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Oct 19 22:54:13 2019
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From: "rogero at howzatt dot demon.co.uk" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/92096] segmentation fault in 'example_labels' building gcc trunk on cygwin
Date: Sat, 19 Oct 2019 22:54:00 -0000
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--- Comment #3 from Roger Orr <rogero at howzatt dot demon.co.uk> ---
A binary chop shows the fault starts with r276878.
>From gcc-bugs-return-656939-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Oct 20 04:22:48 2019
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Subject: [Bug c++/90159] Poor warning for an ambiguous reference
Date: Sun, 20 Oct 2019 04:22:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-10-20
Ever confirmed|0 |1
--- Comment #1 from Eric Gallager <egallager at gcc dot gnu.org> ---
Confirmed.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/83584] "ISO C forbids conversion of object pointer to function pointer type" -- no, not really
Date: Sun, 20 Oct 2019 13:03:00 -0000
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Witold Baryluk <witold.baryluk+gcc at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |witold.baryluk+gcc at gmail dot co
| |m
--- Comment #19 from Witold Baryluk <witold.baryluk+gcc at gmail dot com> ---
This is still happening, even when using -std=c11 with gcc 9.2.1
C11 does state in annex J.5.7:
http://port70.net/~nsz/c/c11/n1570.html#J.5.7p1
"""
J.5.7 Function pointer casts
1 A pointer to an object or to void may be cast to a pointer to a function,
allowing data to be invoked as a function (6.5.4).
"""
I am not sure how else I am supposed to use `dlsym(3)`. Maybe if there was a
version of dlsym that instead of returning (void*), would return (void(*)()) or
(void (*)(void)) it would help. Maybe it is a POSIX bug then?
This issue however is not a duplicate of bug 11234. And the error message is
incorrect anyway.
Sorry if this was mentioned before.
>From gcc-bugs-return-656941-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Oct 20 13:10:41 2019
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From: "witold.baryluk+gcc at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/83584] "ISO C forbids conversion of object pointer to function pointer type" -- no, not really
Date: Sun, 20 Oct 2019 13:10:00 -0000
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--- Comment #20 from Witold Baryluk <witold.baryluk+gcc at gmail dot com> ---
FYI. http://austingroupbugs.net/view.php?id=74#c205
says
Note that conversion from a void * pointer to a function pointer
as in:
fptr = (int (*)(int))dlsym(handle, "my_function");
is not defined by the ISO C Standard. This standard requires
this conversion to work correctly on conforming implementations.
This is published now as IEEE Std 1003.1-2017, aka POSIX.1-2017:
https://pubs.opengroup.org/onlinepubs/9699919799/functions/dlsym.html
POSIX standard is free to do so.
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Subject: [Bug target/87243] FSF GCC needs to do something special (like using xcrun) on darwin18 to find system headers in SDK
Date: Sun, 20 Oct 2019 16:44:00 -0000
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--- Comment #12 from Iain Sandoe <iains at gcc dot gnu.org> ---
Author: iains
Date: Sun Oct 20 16:43:57 2019
New Revision: 277213
URL: https://gcc.gnu.org/viewcvs?rev=277213&root=gcc&view=rev
Log:
[Darwin] Pick up SDKROOT as the sysroot fallback.
For compatibility with xcrun and the behaviour of the clang driver, make use
of the setting of the SDKROOT environment variable when it is available.
This applies to both finding headers and libraries (i.e. it is also passed to
ld64).
Priority:
1. User's command-line specified --sysroot= or -isysroot.
2. The SDKROOT variable when set, and validated.
3. Any sysroot provided by --with-sysroot= configuration parameter.
SDKROOT is checked thus:
1. Presence.
2. That it starts with / (i.e. 'absolute').
3. That it is not / only (since that's the default).
4. That it is readable by the process executing the driver.
This is pretty much the same rule set as used by the clang driver.
NOTE: (3) might turn out to be overly restrictive in the case that we
have configured with --with-sysroot= and then we want to run on a system
with an installation of the headers/libraries in /. We can revisit this
if that turns out to be an important use-case.
So one can do:
xcrun --sdk macosx /path/to/gcc ....
and that provides the SDK path as the sysroot to GCC as expected.
CAVEAT: An unfortunate effect of the fact that gcc (and g++) are
executables in the Xcode installation, which are found ahead of any such
named in the $PATH
PATH=/path/to/gcc/install:$PATH
xcrun --sdk macosx gcc ....
does *not* work, instead that executes the clang from the xcode/commmand
line tools installation.
PATH=/path/to/gcc/install:$PATH
xcrun --sdk macosx x64_64-apple-darwinXX-gcc ...
does work as expected, however.
gcc/
2019-10-20 Iain Sandoe <iain@sandoe.co.uk>
Backport from mainline
2019-10-03 Iain Sandoe <iain@sandoe.co.uk>
PR target/87243
* config/darwin-driver.c (maybe_get_sysroot_from_sdkroot): New.
(darwin_driver_init): Use the sysroot provided by SDKROOT when that
is available and the user has not set one on the command line.
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/config/darwin-driver.c
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From: "gcc-bugzilla at daryl dot haresign.com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/92143] std::pmr::polymorphic_allocator<char> throws bad_alloc on macOS
Date: Sun, 20 Oct 2019 16:57:00 -0000
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--- Comment #8 from Daryl Haresign <gcc-bugzilla at daryl dot haresign.com> ---
(In reply to Jonathan Wakely from comment #5)
> C11 6.2.8 says "Valid alignments
> include only those values returned by an _Alignof expression for fundamental
> types, plus an additional implementation-defined set of values, which may be
> empty. Every valid alignment shall be a nonnegative integral power of two."
>
> _Alignof(char) and _Alignof(short) and _Alignof(int) are valid alignments
> supported by the implementation, and so aligned_alloc is wrong to reject
> them.
Read together I agree it does sound that way.
(In reply to Jonathan Wakely from comment #7)
> Fixed on trunk so far, but I'll backport it too.
Great, thanks!
>From gcc-bugs-return-656944-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Oct 21 02:09:05 2019
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Subject: [Bug tree-optimization/92161] New: [10 Regression] ICE in vect_get_vec_def_for_stmt_copy, at tree-vect-stmts.c:1687
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92161
Bug ID: 92161
Summary: [10 Regression] ICE in vect_get_vec_def_for_stmt_copy,
at tree-vect-stmts.c:1687
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: asolokha at gmx dot com
Target Milestone: ---
Target: powerpc-*-linux-gnu
gfortran-10.0.0-alpha20191013 snapshot (r276943) ICEs when compiling the
following testcase w/ -mvsx -O1 -ftree-loop-vectorize -fno-signed-zeros
-fno-trapping-math:
COMPLEX FUNCTION R1 (ZR, CC, EA, U6)
INTEGER ZR, U6, FZ, J2
COMPLEX EA(*), CC
DOUBLE PRECISION OS, GA, YU, XT
OS = DBLE(REAL(CC))
GA = DBLE(AIMAG(CC))
J2 = 1
DO 5 FZ = 1, ZR
YU = DBLE(REAL(EA(J2)))
XT = DBLE(AIMAG(EA(J2)))
OS = OS + (YU * 2) - (XT * 2)
GA = GA + (YU * 3) + (XT * 3)
J2 = J2 + U6
5 CONTINUE
R1 = CMPLX(REAL(OS), REAL(GA))
RETURN
END
% powerpc-e300c3-linux-gnu-gfortran-10.0.0-alpha20191013 -mvsx -O1
-ftree-loop-vectorize -fno-signed-zeros -fno-trapping-math -c svv5mckh.f
during GIMPLE pass: vect
svv5mckh.f:1:0:
1 | COMPLEX FUNCTION R1 (ZR, CC, EA, U6)
|
internal compiler error: in vect_get_vec_def_for_stmt_copy, at
tree-vect-stmts.c:1687
0x6dc2ed vect_get_vec_def_for_stmt_copy(vec_info*, tree_node*)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-10.0.0_alpha20191013/work/gcc-10-20191013/gcc/tree-vect-stmts.c:1687
0x6dc2ed vect_get_vec_def_for_stmt_copy(vec_info*, tree_node*)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-10.0.0_alpha20191013/work/gcc-10-20191013/gcc/tree-vect-stmts.c:1679
0x109d672 vect_get_vec_defs_for_stmt_copy(vec_info*, vec<tree_node*, va_heap,
vl_ptr>*, vec<tree_node*, va_heap, vl_ptr>*)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-10.0.0_alpha20191013/work/gcc-10-20191013/gcc/tree-vect-stmts.c:1712
0x10a2e26 vectorizable_operation
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-10.0.0_alpha20191013/work/gcc-10-20191013/gcc/tree-vect-stmts.c:6217
0x10c003a vect_transform_stmt(_stmt_vec_info*, gimple_stmt_iterator*,
_slp_tree*, _slp_instance*)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-10.0.0_alpha20191013/work/gcc-10-20191013/gcc/tree-vect-stmts.c:10769
0x10c2164 vect_transform_loop_stmt
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-10.0.0_alpha20191013/work/gcc-10-20191013/gcc/tree-vect-loop.c:8106
0x10c75b3 vect_transform_loop(_loop_vec_info*)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-10.0.0_alpha20191013/work/gcc-10-20191013/gcc/tree-vect-loop.c:8333
0x10f5b76 try_vectorize_loop_1
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-10.0.0_alpha20191013/work/gcc-10-20191013/gcc/tree-vectorizer.c:983
0x10f669e vectorize_loops()
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-10.0.0_alpha20191013/work/gcc-10-20191013/gcc/tree-vectorizer.c:1115
>From gcc-bugs-return-656945-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Oct 21 04:33:54 2019
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Subject: [Bug target/71045] [SH] gcc.dg/torture/pr68264.c -O0 and -Os failures
Date: Mon, 21 Oct 2019 04:33:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |aoliva at gcc dot gnu.org
--- Comment #7 from Eric Gallager <egallager at gcc dot gnu.org> ---
hm, MAINTAINERS says Alexandre Oliva is an SH maintainer, too? cc-ing him
>From gcc-bugs-return-656946-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Oct 21 04:39:44 2019
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Subject: [Bug c/87038] diagnostics: Have -Wjump-misses-init be enabled by -Wall or -Wextra
Date: Mon, 21 Oct 2019 04:39:00 -0000
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--- Comment #24 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Harald van Dijk from comment #23)
> (In reply to Eric Gallager from comment #22)
> > (In reply to Harald van Dijk from comment #21)
> > > Since -Wjump-misses-init triggers too often for commonly used C patterns,
> > > I do not think it is appropriate to include it in -Wall.
> >
> > OK, so what about -Wextra then?
>
> My personal feeling as a user is that clang's warning is useful enough that
> if GCC were to implement that, that one could be included in -Wall. It
> avoids warning for the common cases where code works as intended, and still
> manages to warn for the OP's code. I do not know how much work it would be
> to implement that; if it would be too much work, then including
> -Wjump-misses-init in -Wextra makes sense to me.
Well, since no one's done it yet, I'm guessing it's probably too much work,
so... can we just go with the latter?
>From gcc-bugs-return-656947-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Oct 21 06:55:19 2019
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Subject: [Bug testsuite/52641] Test cases fail for 16-bit int targets
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--- Comment #18 from Georg-Johann Lay <gjl at gcc dot gnu.org> ---
Author: gjl
Date: Mon Oct 21 06:54:42 2019
New Revision: 277236
URL: https://gcc.gnu.org/viewcvs?rev=277236&root=gcc&view=rev
Log:
Fix some fallout for small targets.
PR testsuite/52641
* gcc.dg/torture/pr86034.c: Use 32-bit base type for a bitfield of
width > 16 bits.
* gcc.dg/torture/pr90972.c [avr]: Add option "-w".
* gcc.dg/torture/pr87693.c: Same.
* gcc.dg/torture/pr91178.c: Add dg-require-effective-target size32plus.
* gcc.dg/torture/pr91178-2.c: Same.
* gcc.dg/torture/20181024-1.c
* gcc.dg/torture/pr86554-1.c: Use 32-bit integers.
* gcc.dg/tree-ssa/pr91091-1.c: Same.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/torture/20181024-1.c
trunk/gcc/testsuite/gcc.dg/torture/pr86034.c
trunk/gcc/testsuite/gcc.dg/torture/pr86554-1.c
trunk/gcc/testsuite/gcc.dg/torture/pr87693.c
trunk/gcc/testsuite/gcc.dg/torture/pr90972.c
trunk/gcc/testsuite/gcc.dg/torture/pr91178-2.c
trunk/gcc/testsuite/gcc.dg/torture/pr91178.c
trunk/gcc/testsuite/gcc.dg/tree-ssa/pr91091-1.c
>From gcc-bugs-return-656948-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Oct 21 07:32:22 2019
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Subject: [Bug tree-optimization/91532] [SVE] Redundant predicated store in gcc.target/aarch64/fmla_2.c
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--- Comment #4 from prathamesh3492 at gcc dot gnu.org ---
Author: prathamesh3492
Date: Mon Oct 21 07:31:45 2019
New Revision: 277237
URL: https://gcc.gnu.org/viewcvs?rev=277237&root=gcc&view=rev
Log:
2019-10-21 Prathamesh Kulkarni <prathamesh.kulkarni@linaro.org>
PR tree-optimization/91532
* gcc.target/aarch64/sve/fmla_2.c: Add dg-scan check for two st1d
insns.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.target/aarch64/sve/fmla_2.c
>From gcc-bugs-return-656949-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Oct 21 07:40:17 2019
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Subject: [Bug inline-asm/92151] Spurious register copying
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization, ra
Target| |x86_64-*-*, i?86-*-*
Version|unknown |9.1.0
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
I wonder if it's better to put all of the assembler into a single asm() ...
(or write actual assembly rather than using inline-asm).
>From gcc-bugs-return-656950-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Oct 21 07:42:37 2019
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Subject: [Bug tree-optimization/92152] [10 Regression] Wrong code (Resurrection of PR53663)
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2019-10-21
Component|other |tree-optimization
Target Milestone|--- |10.0
Ever confirmed|0 |1
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Hmm, on avr int == short == int16_t, right? I will try to have a look.
>From gcc-bugs-return-656951-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Oct 21 08:00:46 2019
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Subject: [Bug c++/92158] Enum warning when -1 enum converted to unsigned int or int
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Keywords| |diagnostic
Version|unknown |10.0
Severity|normal |enhancement
>From gcc-bugs-return-656952-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Oct 21 08:01:32 2019
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Subject: [Bug c++/92159] -Wenum-conversion for C++
Date: Mon, 21 Oct 2019 08:01:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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>From gcc-bugs-return-656953-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Oct 21 08:19:44 2019
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Subject: [Bug tree-optimization/92161] [10 Regression] ICE in vect_get_vec_def_for_stmt_copy, at tree-vect-stmts.c:1687
Date: Mon, 21 Oct 2019 08:19:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2019-10-21
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-656954-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Oct 21 08:26:55 2019
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From: "clyon at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/92128] fold more non-constant strlen relational expressions
Date: Mon, 21 Oct 2019 08:26:00 -0000
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Christophe Lyon <clyon at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |clyon at gcc dot gnu.org
--- Comment #1 from Christophe Lyon <clyon at gcc dot gnu.org> ---
(In reply to Martin Sebor from comment #0)
> With pr91996 resolved GCC can make use of strlen range information in some
> contexts but not in others. The test for pr91996 only enabled on a subset
> of those where GCC is known to be able to do this, but even for those it is
> specially crafted to exercise only the contexts where the optimization was
> implemented. On other targets (e.g., arm-*-*), or even on others such as
> aarch64-*-* where the test passes, other similar test cases fail. This is
> because the solution for pr91996 was only put in place for multi-byte
> assignments via MEM_REF but not also for calls to memcpy.
>
After r277076 (fix for pr91996), I have noticed that the new test
strlenopt-81.c fails in some cases on arm, is that what you mean above?
For instance, when compiling with -march=armv5t, the test fails because:
FAIL: gcc.dg/strlenopt-81.c (test for excess errors)
Excess errors:
strlenopt-81.c:(.text+0x1e4): undefined reference to
`test_on_line_97_not_eliminated'
strlenopt-81.c:(.text+0x3b8): undefined reference to
`test_on_line_156_not_eliminated'
strlenopt-81.c:(.text+0x40c): undefined reference to
`test_on_line_172_not_eliminated'
UNRESOLVED: gcc.dg/strlenopt-81.c compilation failed to produce executable
>From gcc-bugs-return-656955-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Oct 21 08:30:48 2019
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Subject: [Bug testsuite/92144] [10 regression] c-c++-common/Warray-bounds-4.c still fails after r277080
Date: Mon, 21 Oct 2019 08:30:00 -0000
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Christophe Lyon <clyon at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target|powerpc64*-unknown-linux-gn |powerpc64*-unknown-linux-gn
|u |u arm aarch64
CC| |clyon at gcc dot gnu.org
--- Comment #1 from Christophe Lyon <clyon at gcc dot gnu.org> ---
Seen on arm and aarch64 too.
>From gcc-bugs-return-656956-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Oct 21 08:32:57 2019
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Subject: [Bug tree-optimization/92161] [10 Regression] ICE in vect_get_vec_def_for_stmt_copy, at tree-vect-stmts.c:1687
Date: Mon, 21 Oct 2019 08:32:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r276700.
>From gcc-bugs-return-656957-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Oct 21 08:38:43 2019
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From: "asolokha at gmx dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/92162] New: [10 Regression] ICE in vect_create_epilog_for_reduction, at tree-vect-loop.c:4252
Date: Mon, 21 Oct 2019 08:38:00 -0000
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Bug ID: 92162
Summary: [10 Regression] ICE in
vect_create_epilog_for_reduction, at
tree-vect-loop.c:4252
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: asolokha at gmx dot com
Target Milestone: ---
Target: x86_64-pc-linux-gnu
gcc-10.0.0-alpha20191020 snapshot (r277217) ICEs when compiling the following
testcase w/ -Ofast:
short int s8;
void __attribute__ ((simd))
gn (void)
{
s8 = 0;
}
% x86_64-pc-linux-gnu-gcc-10.0.0-alpha20191020 -Ofast -c ezsapdyo.c
during GIMPLE pass: vect
ezsapdyo.c: In function 'gn.simdclone.5':
ezsapdyo.c:4:1: internal compiler error: in vect_create_epilog_for_reduction,
at tree-vect-loop.c:4252
4 | gn (void)
| ^~
0x6b96a3 vect_create_epilog_for_reduction
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191020/work/gcc-10-20191020/gcc/tree-vect-loop.c:4252
0x6b96a3 vectorizable_live_operation(_stmt_vec_info*, gimple_stmt_iterator*,
_slp_tree*, _slp_instance*, int, bool, vec<stmt_info_for_cost, va_heap,
vl_ptr>*)
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191020/work/gcc-10-20191020/gcc/tree-vect-loop.c:7477
0xe5cb69 can_vectorize_live_stmts
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191020/work/gcc-10-20191020/gcc/tree-vect-stmts.c:10578
0xe5cb69 can_vectorize_live_stmts
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191020/work/gcc-10-20191020/gcc/tree-vect-stmts.c:10559
0xe7cbcc vect_transform_stmt(_stmt_vec_info*, gimple_stmt_iterator*,
_slp_tree*, _slp_instance*)
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191020/work/gcc-10-20191020/gcc/tree-vect-stmts.c:11030
0xe7f3f8 vect_transform_loop_stmt
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191020/work/gcc-10-20191020/gcc/tree-vect-loop.c:7918
0xe88b10 vect_transform_loop(_loop_vec_info*)
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191020/work/gcc-10-20191020/gcc/tree-vect-loop.c:8132
0xeaac51 try_vectorize_loop_1
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191020/work/gcc-10-20191020/gcc/tree-vectorizer.c:982
0xeab82d vectorize_loops()
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191020/work/gcc-10-20191020/gcc/tree-vectorizer.c:1114
>From gcc-bugs-return-656958-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Oct 21 08:55:29 2019
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Subject: [Bug tree-optimization/91940] __builtin_bswap16 loop optimization
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-656959-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Oct 21 09:03:57 2019
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Subject: [Bug tree-optimization/92163] New: [10 Regression] ICE: Segmentation fault (in bitmap_set_bit)
Date: Mon, 21 Oct 2019 09:03:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92163
Bug ID: 92163
Summary: [10 Regression] ICE: Segmentation fault (in
bitmap_set_bit)
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code, openacc
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
CC: prathamesh3492 at gcc dot gnu.org
Target Milestone: ---
gcc-10.0.0-alpha20191020 snapshot (r277217) ICEs when compiling the following
testcase reduced from
libgomp/testsuite/libgomp.oacc-c-c++-common/mode-transitions.c w/ -O2
-fexceptions -fnon-call-exceptions -fopenacc:
void
xr (int *k7)
{
int qa;
#pragma acc parallel
#pragma acc loop vector
for (qa = 0; qa < 3; ++qa)
if (qa % 2 != 0)
k7[qa] = 0;
else
k7[qa] = 1;
}
% gcc-10.0.0-alpha20191020 -O2 -fexceptions -fnon-call-exceptions -fopenacc -c
ejmslzdp.c
during GIMPLE pass: ifcvt
ejmslzdp.c: In function 'xr._omp_fn.0':
ejmslzdp.c:6:9: internal compiler error: Segmentation fault
6 | #pragma acc parallel
| ^~~
0xc78566 crash_signal
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191020/work/gcc-10-20191020/gcc/toplev.c:326
0x83e35f bitmap_set_bit(bitmap_head*, int)
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191020/work/gcc-10-20191020/gcc/bitmap.c:953
0xd7076a delete_dead_or_redundant_assignment(gimple_stmt_iterator*, char
const*)
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191020/work/gcc-10-20191020/gcc/tree-ssa-dse.c:919
0xcde420 ifcvt_local_dce
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191020/work/gcc-10-20191020/gcc/tree-if-conv.c:2978
0xcde420 tree_if_conversion(loop*, vec<gimple*, va_heap, vl_ptr>*)
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191020/work/gcc-10-20191020/gcc/tree-if-conv.c:3094
0xcdf9ab execute
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191020/work/gcc-10-20191020/gcc/tree-if-conv.c:3171
0xcdf9ab execute
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191020/work/gcc-10-20191020/gcc/tree-if-conv.c:3158
>From gcc-bugs-return-656960-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Oct 21 09:07:32 2019
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From: "ubizjak at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/92140] clang vs gcc optimizing with adc/sbb
Date: Mon, 21 Oct 2019 09:07:00 -0000
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--- Comment #30 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Segher Boessenkool from comment #29)
>
> Does it help the i386 port if we disallow a hard reg dest as well?
> RA should be able to handle that just fine as well.
I don't know from the top of my head, but the current approach where
invalid/unwanted propagation is rejected by ix86_legitimate_combined_insn works
well.
So, to answer your question, the effects of a proposed patch should be analysed
on a case-by-case basis. There are several instructions that use fixed output
registers (mostly double-word insns that use rax/rdx pair, e.g. mult and div)
which are usually tied to the input operand, but nobody ever analysed how
additional RA freedom would affect them.
>
> This still will not get rid of *all* (non-fixed) hard registers, you
> still can get them from explicit register variables, and target code
> (or even generic code) can still put some in non-copies, which combine
> will happily propagate further.
Thanks for this info, so it looks that a safety net in the form of
ix86_legitimate_combined_insn (and insn constraints) is still needed.
>From gcc-bugs-return-656961-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Oct 21 09:55:31 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/92161] [10 Regression] ICE in vect_get_vec_def_for_stmt_copy, at tree-vect-stmts.c:1687
Date: Mon, 21 Oct 2019 09:55:00 -0000
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
OK, so the SLP rollback gets in the way of our adjustment of the def-type
in vectorizable_reduction. Hmm.
Testing patch.
>From gcc-bugs-return-656962-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Oct 21 10:05:10 2019
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Subject: [Bug tree-optimization/92152] [10 Regression] Wrong code (Resurrection of PR53663)
Date: Mon, 21 Oct 2019 10:05:00 -0000
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--- Comment #3 from Georg-Johann Lay <gjl at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #2)
> Hmm, on avr int == short == int16_t, right?
Correct.
>From gcc-bugs-return-656963-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Oct 21 10:12:11 2019
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug debug/91929] missing inline subroutine information in build using sin/cos
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--- Comment #13 from rguenther at suse dot de <rguenther at suse dot de> ---
On Fri, 18 Oct 2019, dimhen at gmail dot com wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91929
>
> Dmitry G. Dyachenko <dimhen at gmail dot com> changed:
>
> What |Removed |Added
> ----------------------------------------------------------------------------
> CC| |dimhen at gmail dot com
>
> --- Comment #12 from Dmitry G. Dyachenko <dimhen at gmail dot com> ---
> I see new warnings -Wuninitialized and -Wmaybe-uninitialized after r276993
>
> r276992 no warnings
> r276993 warnings
>
> $ cat x_3.i
> int *a;
> int b, d;
>
> int g() {
> int *c;
> int e[6];
> int f = 1;
> if (0)
> goto cd;
> c = 0;
> for (; d; d++)
> *e = 1 ^ *(c + 1);
> if (f)
> for (b = 0;;)
> a[0] = e[b];
> cd:
> return 0;
> }
>
> $ ~/arch-gcc/gcc_276993/bin/gcc -fpreprocessed -O2 -Wall -c x_3.i
>
> x_3.i: In function ‘g’:
> x_3.i:15:15: warning: ‘e[0]’ may be used uninitialized in this function
> [-Wmaybe-uninitialized]
> 15 | a[0] = e[b];
> | ~^~~
If d is zero then e[0] will be loaded uninitialized. PRE exposes
this to the uninit machinery which previously gave up for loops
by commoning e[b] with the set in the loop plus inserting
a load from e[0] on the path not coming from the loop. I guess
previously the uninit pass didn't emit warnings for the load
because it had no location.
> $ cat x.i
> typedef struct {
> int a[0];
> } c;
> typedef struct {
> c d;
> } * e;
> e a;
> void f(void);
> void f() {
> int c[1];
> for (;;) {
> unsigned long d[0];
> int b, g, h = b = h;
> unsigned long *e = d;
> for (; g; ++g)
> e[g] = 0;
> *a->d.a = *c;
> }
> }
>
> $ ~/arch-gcc/gcc_276993/bin/gcc -fpreprocessed -O2 -Wall -c x.i
> x.i: In function ‘f’:
> x.i:17:13: warning: ‘c[0]’ is used uninitialized in this function
> [-Wuninitialized]
> 17 | *a->d.a = *c;
> | ~~~~~~~~^~~~
This is the same (and g is not initialized here as well)
>From gcc-bugs-return-656964-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Oct 21 10:15:45 2019
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From: "dimhen at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug debug/91929] missing inline subroutine information in build using sin/cos
Date: Mon, 21 Oct 2019 10:15:00 -0000
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--- Comment #14 from Dmitry G. Dyachenko <dimhen at gmail dot com> ---
(In reply to rguenther@suse.de from comment #13)
> On Fri, 18 Oct 2019, dimhen at gmail dot com wrote:
> I guess
> previously the uninit pass didn't emit warnings for the load
> because it had no location.
So new warnings are expected. Nice!
Thank you
>From gcc-bugs-return-656965-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Oct 21 10:23:50 2019
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Subject: [Bug tree-optimization/91532] [SVE] Redundant predicated store in gcc.target/aarch64/fmla_2.c
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rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
Fixed.
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Converting to integral types is a feature of enums, I see no reason to warn.
>From gcc-bugs-return-656967-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Oct 21 10:32:38 2019
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Subject: [Bug c++/92158] Enum warning when -1 enum converted to unsigned int or int
Date: Mon, 21 Oct 2019 10:32:00 -0000
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
At least when the sign doesn't change, i.e. for conversion to int.
Please clarify what exactly you want a warning to do.
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Subject: [Bug c++/92159] -Wenum-conversion for C++
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Your testcase doesn't warn for C.
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Subject: [Bug c++/92159] -Wenum-conversion for C++
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonny Grant from comment #0)
> Bug 60591 added -Wenum-conversion for C
I think you mean Bug 78736, and the C option doesn't warn for your testcase. It
warns for conversions from one enumeration type to another enumeration type,
which is already ill-formed in C++. Adding a warning for something that doesn't
compile anyway is useless.
Please clarify exactly what you're asking for.
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Subject: [Bug c++/92158] Enum warning when -1 enum converted to unsigned int or int
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Your example doesn't warn with Clang or Clang++ either.
>From gcc-bugs-return-656971-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Oct 21 10:46:30 2019
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Subject: [Bug c++/92159] -Wenum-conversion for C++
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This doesn't seem to warn with Clang or Clang++ either.
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Subject: [Bug c/92164] New: Wrong result using builtin rint/rintf optimization in x86_64
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Bug ID: 92164
Summary: Wrong result using builtin rint/rintf optimization in
x86_64
Product: gcc
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Created attachment 47071
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47071&action=edit
Test source and build script
Dear GCC team,
we've found that the usage of GCCs builtin rint() or rintf() functions on
x86_64 platforms, as are introduced with optimization -O1 and above results in
a change of the runtime result of those functions.
When compiling the attached testprogram with "-O0" or using "-O1
-fno-builtin-rint" the results are as expected as defined by the API. Using
GCCs builtin some of the results differ from the expected values.
It seems operations using FE_DOWNWARD and FE_UPWARD are behaving contrarily for
negative floating point inputs to rint/rintf using builtin rint functions,
resulting in the wrongly rounded value.
The behaviour was reproduced on x86_64 platforms Ubuntu Linux 19.10, MSys2 and
bare metal x86_64 toolchains with GCC compilers 8.2, 9.1, 9.2.1.
Please find attached the bzipped test program (rinttest.tar.bz2), including
build.sh script to compile and run. This should provide a similar output as in
attached text file (rinttest_output.txt).
Please let me know if I can assist any further.
Best, Steffen
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Subject: [Bug c/92164] Wrong result using builtin rint/rintf optimization in x86_64
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--- Comment #1 from Steffen Schmidt <steffen-schmidt at siemens dot com> ---
Created attachment 47072
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47072&action=edit
Test result output text.
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Subject: [Bug tree-optimization/92152] [10 Regression] Wrong code (Resurrection of PR53663)
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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CC| |hubicka at gcc dot gnu.org
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
OK, so this happens in visit_reference_op_store which hits
if (dump_file && (dump_flags & TDF_DETAILS))
fprintf (dump_file, "Store matched earlier value, "
"value numbering store vdefs to matching vuses.\n");
changed |= set_ssa_val_to (vdef, SSA_VAL (vuse));
where I actually wondered if I could trigger wrong-code with it. The
counter-measure is
/* If the TBAA state isn't compatible for downstream reads
we cannot value-number the VDEFs the same. */
alias_set_type set = get_alias_set (lhs);
if (vnresult->set != set
&& ! alias_set_subset_of (set, vnresult->set))
resultsame = false;
but here we have v.i and v.f both of which get the alias-set of the union.
We later disambiguate u.i against *f via aliasing_component_refs_p which
correctly assesses that if u.i is the active union member then the load
via *f cannot alias it.
On x86_64 we optimize away the v.f store as redundant but then still
don't CSE because somehow aliasing_component_refs_p doesn't get it in
the case both fields are not of the same size.
So I'm not entirely sure it isn't aliasing_component_refs_p that is to blame.
At least it should make the testcase also fail on x86_64...
Honza?
>From gcc-bugs-return-656976-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Oct 21 11:19:46 2019
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Subject: [Bug tree-optimization/92163] [10 Regression] ICE: Segmentation fault (in bitmap_set_bit)
Date: Mon, 21 Oct 2019 11:19:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Subject: [Bug c/92164] Wrong result using builtin rint/rintf optimization in x86_64
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Did you compile with -frounding-math?
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Subject: [Bug tree-optimization/92162] [10 Regression] ICE in vect_create_epilog_for_reduction, at tree-vect-loop.c:4252
Date: Mon, 21 Oct 2019 11:20:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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Last reconfirmed| |2019-10-21
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
mine I bet
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Subject: [Bug inline-asm/92151] Spurious register copying
Date: Mon, 21 Oct 2019 11:23:00 -0000
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Chris Hall <gcc at gmch dot uk> changed:
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CC| |gcc at gmch dot uk
--- Comment #2 from Chris Hall <gcc at gmch dot uk> ---
(In reply to Richard Biener from comment #1)
> I wonder if it's better to put all of the assembler into a single asm() ...
> (or write actual assembly rather than using inline-asm).
In this case, yes -- I now declare the function "naked" and avoid the issue.
However, I have some functions which are designed to be always be inlined, and
which have a "hot" part and one or more "cold" parts. For those (I believe) I
still need to use __asm__ goto() etc.
Further, I wonder if what I see with inline __asm__ is a symptom of some more
general register allocation funkiness.
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Subject: [Bug tree-optimization/92161] [10 Regression] ICE in vect_get_vec_def_for_stmt_copy, at tree-vect-stmts.c:1687
Date: Mon, 21 Oct 2019 11:33:00 -0000
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Oct 21 11:32:25 2019
New Revision: 277240
URL: https://gcc.gnu.org/viewcvs?rev=277240&root=gcc&view=rev
Log:
2019-10-21 Richard Biener <rguenther@suse.de>
PR tree-optimization/92161
* tree-vect-loop.c (vect_analyze_loop_2): Reset stmts def-type
for reductions.
* gfortran.dg/pr92161.f: New testcase.
Added:
trunk/gcc/testsuite/gfortran.dg/pr92161.f
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-vect-loop.c
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Subject: [Bug tree-optimization/92161] [10 Regression] ICE in vect_get_vec_def_for_stmt_copy, at tree-vect-stmts.c:1687
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug c/91401] schedule + dist_schedule clauses rejected on distribute parallel for
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Mon Oct 21 11:35:09 2019
New Revision: 277243
URL: https://gcc.gnu.org/viewcvs?rev=277243&root=gcc&view=rev
Log:
Backported from mainline
2019-08-09 Jakub Jelinek <jakub@redhat.com>
PR c/91401
* c-parser.c (c_parser_omp_clause_dist_schedule): Fix up typos in the
check_no_duplicate_clause call. Comment it out, instead emit a
warning for duplicate dist_schedule clauses.
* parser.c (cp_parser_omp_clause_dist_schedule): Comment out the
check_no_duplicate_clause call, instead emit a warning for duplicate
dist_schedule clauses.
* c-c++-common/gomp/pr91401-1.c: New test.
* c-c++-common/gomp/pr91401-2.c: New test.
Added:
branches/gcc-9-branch/gcc/testsuite/c-c++-common/gomp/pr91401-1.c
branches/gcc-9-branch/gcc/testsuite/c-c++-common/gomp/pr91401-2.c
Modified:
branches/gcc-9-branch/gcc/c/ChangeLog
branches/gcc-9-branch/gcc/c/c-parser.c
branches/gcc-9-branch/gcc/cp/ChangeLog
branches/gcc-9-branch/gcc/cp/parser.c
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Subject: [Bug go/91617] [10 regression] Many go test case failures after r275026
Date: Mon, 21 Oct 2019 11:37:00 -0000
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--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Mon Oct 21 11:36:36 2019
New Revision: 277244
URL: https://gcc.gnu.org/viewcvs?rev=277244&root=gcc&view=rev
Log:
Backported from mainline
2019-09-02 Jakub Jelinek <jakub@redhat.com>
PR go/91617
* fold-const.c (range_check_type): For enumeral and boolean
type, pass 1 to type_for_size langhook instead of
TYPE_UNSIGNED (etype). Return unsigned_type_for result whenever
etype isn't TYPE_UNSIGNED INTEGER_TYPE.
(build_range_check): Don't call unsigned_type_for for pointer types.
* match.pd (X / C1 op C2): Don't call unsigned_type_for on
range_check_type result.
2019-08-29 Jakub Jelinek <jakub@redhat.com>
PR tree-optimization/91351
* tree-cfg.c (generate_range_test): Use range_check_type instead of
unsigned_type_for.
* tree-cfgcleanup.c (convert_single_case_switch): Punt if
range_check_type returns NULL.
* tree-switch-conversion.c (switch_conversion::build_one_array):
Use range_check_type instead of unsigned_type_for, don't perform
linear opt if it returns NULL.
(bit_test_cluster::find_bit_tests): Formatting fix.
(bit_test_cluster::emit): Use range_check_type instead of
unsigned_type_for.
(switch_decision_tree::try_switch_expansion): Punt if range_check_type
returns NULL.
* g++.dg/opt/pr91351.C: New test.
Added:
branches/gcc-9-branch/gcc/testsuite/g++.dg/opt/pr91351.C
Modified:
branches/gcc-9-branch/gcc/ChangeLog
branches/gcc-9-branch/gcc/fold-const.c
branches/gcc-9-branch/gcc/match.pd
branches/gcc-9-branch/gcc/testsuite/ChangeLog
branches/gcc-9-branch/gcc/tree-cfg.c
branches/gcc-9-branch/gcc/tree-cfgcleanup.c
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Subject: [Bug tree-optimization/91351] [9 Regression] -fstrict-enums generates incorrect code
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91351
--- Comment #15 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Mon Oct 21 11:36:36 2019
New Revision: 277244
URL: https://gcc.gnu.org/viewcvs?rev=277244&root=gcc&view=rev
Log:
Backported from mainline
2019-09-02 Jakub Jelinek <jakub@redhat.com>
PR go/91617
* fold-const.c (range_check_type): For enumeral and boolean
type, pass 1 to type_for_size langhook instead of
TYPE_UNSIGNED (etype). Return unsigned_type_for result whenever
etype isn't TYPE_UNSIGNED INTEGER_TYPE.
(build_range_check): Don't call unsigned_type_for for pointer types.
* match.pd (X / C1 op C2): Don't call unsigned_type_for on
range_check_type result.
2019-08-29 Jakub Jelinek <jakub@redhat.com>
PR tree-optimization/91351
* tree-cfg.c (generate_range_test): Use range_check_type instead of
unsigned_type_for.
* tree-cfgcleanup.c (convert_single_case_switch): Punt if
range_check_type returns NULL.
* tree-switch-conversion.c (switch_conversion::build_one_array):
Use range_check_type instead of unsigned_type_for, don't perform
linear opt if it returns NULL.
(bit_test_cluster::find_bit_tests): Formatting fix.
(bit_test_cluster::emit): Use range_check_type instead of
unsigned_type_for.
(switch_decision_tree::try_switch_expansion): Punt if range_check_type
returns NULL.
* g++.dg/opt/pr91351.C: New test.
Added:
branches/gcc-9-branch/gcc/testsuite/g++.dg/opt/pr91351.C
Modified:
branches/gcc-9-branch/gcc/ChangeLog
branches/gcc-9-branch/gcc/fold-const.c
branches/gcc-9-branch/gcc/match.pd
branches/gcc-9-branch/gcc/testsuite/ChangeLog
branches/gcc-9-branch/gcc/tree-cfg.c
branches/gcc-9-branch/gcc/tree-cfgcleanup.c
branches/gcc-9-branch/gcc/tree-switch-conversion.c
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Subject: =?UTF-8?B?W0J1ZyBsdG8vOTE1NzJdIFs5IFJlZ3Jlc3Npb25dIGx0bzE6IGVycm9yOiB0?= =?UTF-8?B?eXBlIHZhcmlhbnQgaGFzIGRpZmZlcmVudCDigJhUUkVFX1RZUEXigJkgc2lu?= =?UTF-8?B?Y2UgcjI2OTg2Mg==?Date: Mon, 21 Oct 2019 11:38:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91572
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Mon Oct 21 11:37:41 2019
New Revision: 277245
URL: https://gcc.gnu.org/viewcvs?rev=277245&root=gcc&view=rev
Log:
Backported from mainline
2019-09-01 Jakub Jelinek <jakub@redhat.com>
PR lto/91572
* tree.c (find_decls_types_in_node): Also walk TREE_PURPOSE of
GIMPLE_ASM TREE_LIST operands.
* g++.dg/lto/pr91572_0.C: New test.
Added:
branches/gcc-9-branch/gcc/testsuite/g++.dg/lto/pr91572_0.C
Modified:
branches/gcc-9-branch/gcc/ChangeLog
branches/gcc-9-branch/gcc/testsuite/ChangeLog
branches/gcc-9-branch/gcc/tree.c
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Subject: [Bug middle-end/91623] [7/8/9 Regression] -msse4.1 -O3 segfault in /usr/lib/gcc/x86_64-pc-linux-gnu/8.3.0/include/smmintrin.h:270:10
Date: Mon, 21 Oct 2019 11:39:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91623
--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Mon Oct 21 11:38:37 2019
New Revision: 277246
URL: https://gcc.gnu.org/viewcvs?rev=277246&root=gcc&view=rev
Log:
Backported from mainline
2019-09-01 Jakub Jelinek <jakub@redhat.com>
PR middle-end/91623
* optabs.c (expand_vec_cond_expr): If op0 is a VECTOR_CST and only
EQ_EXPR/NE_EXPR is supported, verify that op0 only contains
zeros or negative elements and use NE_EXPR instead of LT_EXPR against
zero vector.
* gcc.target/i386/pr91623.c: New test.
Added:
branches/gcc-9-branch/gcc/testsuite/gcc.target/i386/pr91623.c
Modified:
branches/gcc-9-branch/gcc/ChangeLog
branches/gcc-9-branch/gcc/optabs.c
branches/gcc-9-branch/gcc/testsuite/ChangeLog
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Subject: [Bug tree-optimization/91632] [10 Regression] Probably wrong code since r275026
Date: Mon, 21 Oct 2019 11:39:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91632
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Mon Oct 21 11:39:04 2019
New Revision: 277247
URL: https://gcc.gnu.org/viewcvs?rev=277247&root=gcc&view=rev
Log:
Backported from mainline
2019-09-02 Jakub Jelinek <jakub@redhat.com>
PR tree-optimization/91632
* gcc.c-torture/execute/pr91632.c: New test.
Added:
branches/gcc-9-branch/gcc/testsuite/gcc.c-torture/execute/pr91632.c
Modified:
branches/gcc-9-branch/gcc/testsuite/ChangeLog
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Subject: [Bug middle-end/91001] internal compiler error: in extract_insn, at recog.c:2310
Date: Mon, 21 Oct 2019 11:40:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91001
--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Mon Oct 21 11:39:53 2019
New Revision: 277248
URL: https://gcc.gnu.org/viewcvs?rev=277248&root=gcc&view=rev
Log:
Backported from mainline
2019-09-06 Jakub Jelinek <jakub@redhat.com>
* function.c (assign_parm_find_data_types): Use RECORD_OR_UNION_TYPE_P
before testing TYPE_TRANSPARENT_AGGR.
* calls.c (initialize_argument_information, load_register_parameters):
Likewise.
2019-09-05 Jakub Jelinek <jakub@redhat.com>
PR middle-end/91001
PR middle-end/91105
PR middle-end/91106
* calls.c (load_register_parameters): For TYPE_TRANSPARENT_AGGR
types, use type of their first field instead of type of
args[i].tree_value.
* gcc.c-torture/compile/pr91001.c: New test.
Added:
branches/gcc-9-branch/gcc/testsuite/gcc.c-torture/compile/pr91001.c
Modified:
branches/gcc-9-branch/gcc/ChangeLog
branches/gcc-9-branch/gcc/calls.c
branches/gcc-9-branch/gcc/function.c
branches/gcc-9-branch/gcc/testsuite/ChangeLog
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Subject: [Bug middle-end/91105] internal compiler error: maximum number of generated reload insns per insn achieved (90)
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91105
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Mon Oct 21 11:39:53 2019
New Revision: 277248
URL: https://gcc.gnu.org/viewcvs?rev=277248&root=gcc&view=rev
Log:
Backported from mainline
2019-09-06 Jakub Jelinek <jakub@redhat.com>
* function.c (assign_parm_find_data_types): Use RECORD_OR_UNION_TYPE_P
before testing TYPE_TRANSPARENT_AGGR.
* calls.c (initialize_argument_information, load_register_parameters):
Likewise.
2019-09-05 Jakub Jelinek <jakub@redhat.com>
PR middle-end/91001
PR middle-end/91105
PR middle-end/91106
* calls.c (load_register_parameters): For TYPE_TRANSPARENT_AGGR
types, use type of their first field instead of type of
args[i].tree_value.
* gcc.c-torture/compile/pr91001.c: New test.
Added:
branches/gcc-9-branch/gcc/testsuite/gcc.c-torture/compile/pr91001.c
Modified:
branches/gcc-9-branch/gcc/ChangeLog
branches/gcc-9-branch/gcc/calls.c
branches/gcc-9-branch/gcc/function.c
branches/gcc-9-branch/gcc/testsuite/ChangeLog
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Subject: [Bug target/91106] internal compiler error: output_operand: invalid use of register 'frame'
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91106
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Mon Oct 21 11:39:53 2019
New Revision: 277248
URL: https://gcc.gnu.org/viewcvs?rev=277248&root=gcc&view=rev
Log:
Backported from mainline
2019-09-06 Jakub Jelinek <jakub@redhat.com>
* function.c (assign_parm_find_data_types): Use RECORD_OR_UNION_TYPE_P
before testing TYPE_TRANSPARENT_AGGR.
* calls.c (initialize_argument_information, load_register_parameters):
Likewise.
2019-09-05 Jakub Jelinek <jakub@redhat.com>
PR middle-end/91001
PR middle-end/91105
PR middle-end/91106
* calls.c (load_register_parameters): For TYPE_TRANSPARENT_AGGR
types, use type of their first field instead of type of
args[i].tree_value.
* gcc.c-torture/compile/pr91001.c: New test.
Added:
branches/gcc-9-branch/gcc/testsuite/gcc.c-torture/compile/pr91001.c
Modified:
branches/gcc-9-branch/gcc/ChangeLog
branches/gcc-9-branch/gcc/calls.c
branches/gcc-9-branch/gcc/function.c
branches/gcc-9-branch/gcc/testsuite/ChangeLog
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Subject: [Bug tree-optimization/91665] [8/9 Regression] ICE in build_vector_from_val, at tree.c:1904
Date: Mon, 21 Oct 2019 11:41:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91665
--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Mon Oct 21 11:40:48 2019
New Revision: 277249
URL: https://gcc.gnu.org/viewcvs?rev=277249&root=gcc&view=rev
Log:
Backported from mainline
2019-09-07 Jakub Jelinek <jakub@redhat.com>
PR tree-optimization/91665
* tree-vect-loop.c (vectorizable_reduction): Punt if base has type
incompatible with the type of PHI result.
* gcc.dg/vect/pr91665.c: New test.
Added:
branches/gcc-9-branch/gcc/testsuite/gcc.dg/vect/pr91665.c
Modified:
branches/gcc-9-branch/gcc/ChangeLog
branches/gcc-9-branch/gcc/testsuite/ChangeLog
branches/gcc-9-branch/gcc/tree-vect-loop.c
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/91723] [9 Regression] builtin fma is not optimized or vectorized as *+
Date: Mon, 21 Oct 2019 11:42:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91723
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Mon Oct 21 11:41:40 2019
New Revision: 277250
URL: https://gcc.gnu.org/viewcvs?rev=277250&root=gcc&view=rev
Log:
Backported from mainline
2019-09-11 Jakub Jelinek <jakub@redhat.com>
PR tree-optimization/91723
* tree-vect-stmts.c (vectorizable_call): Use types_compatible_p check
instead of pointer equality when checking if argument vectypes are
the same.
* gcc.dg/vect/vect-fma-3.c: New test.
Added:
branches/gcc-9-branch/gcc/testsuite/gcc.dg/vect/vect-fma-3.c
Modified:
branches/gcc-9-branch/gcc/ChangeLog
branches/gcc-9-branch/gcc/testsuite/ChangeLog
branches/gcc-9-branch/gcc/tree-vect-stmts.c
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/91720] [10 Regression] wrong code with -Og -fno-forward-propagate -frerun-cse-after-loop -fno-tree-fre
Date: Mon, 21 Oct 2019 11:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91720
--- Comment #14 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Mon Oct 21 11:42:37 2019
New Revision: 277251
URL: https://gcc.gnu.org/viewcvs?rev=277251&root=gcc&view=rev
Log:
Backported from mainline
2019-09-11 Jakub Jelinek <jakub@redhat.com>
PR rtl-optimization/89435
PR rtl-optimization/89795
PR rtl-optimization/91720
* gcc.dg/pr89435.c: New test.
* gcc.dg/pr89795.c: New test.
* gcc.dg/pr91720.c: New test.
Added:
branches/gcc-9-branch/gcc/testsuite/gcc.dg/pr89435.c
branches/gcc-9-branch/gcc/testsuite/gcc.dg/pr89795.c
branches/gcc-9-branch/gcc/testsuite/gcc.dg/pr91720.c
Modified:
branches/gcc-9-branch/gcc/testsuite/ChangeLog
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/89795] [7/8/9/10 Regression] wrong code with -O2 -fno-dce -fno-forward-propagate -fno-sched-pressure
Date: Mon, 21 Oct 2019 11:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89795
--- Comment #17 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Mon Oct 21 11:42:37 2019
New Revision: 277251
URL: https://gcc.gnu.org/viewcvs?rev=277251&root=gcc&view=rev
Log:
Backported from mainline
2019-09-11 Jakub Jelinek <jakub@redhat.com>
PR rtl-optimization/89435
PR rtl-optimization/89795
PR rtl-optimization/91720
* gcc.dg/pr89435.c: New test.
* gcc.dg/pr89795.c: New test.
* gcc.dg/pr91720.c: New test.
Added:
branches/gcc-9-branch/gcc/testsuite/gcc.dg/pr89435.c
branches/gcc-9-branch/gcc/testsuite/gcc.dg/pr89795.c
branches/gcc-9-branch/gcc/testsuite/gcc.dg/pr91720.c
Modified:
branches/gcc-9-branch/gcc/testsuite/ChangeLog
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Subject: [Bug rtl-optimization/89435] [7/8/9 Regression] wrong code with -O1 -march=armv4 -fno-forward-propagate with __builtin_sub_overflow()
Date: Mon, 21 Oct 2019 11:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89435
--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Mon Oct 21 11:42:37 2019
New Revision: 277251
URL: https://gcc.gnu.org/viewcvs?rev=277251&root=gcc&view=rev
Log:
Backported from mainline
2019-09-11 Jakub Jelinek <jakub@redhat.com>
PR rtl-optimization/89435
PR rtl-optimization/89795
PR rtl-optimization/91720
* gcc.dg/pr89435.c: New test.
* gcc.dg/pr89795.c: New test.
* gcc.dg/pr91720.c: New test.
Added:
branches/gcc-9-branch/gcc/testsuite/gcc.dg/pr89435.c
branches/gcc-9-branch/gcc/testsuite/gcc.dg/pr89795.c
branches/gcc-9-branch/gcc/testsuite/gcc.dg/pr91720.c
Modified:
branches/gcc-9-branch/gcc/testsuite/ChangeLog
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/91920] ggc 9.2.0 failing openmp compile on ppc64le
Date: Mon, 21 Oct 2019 11:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91920
--- Comment #15 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Mon Oct 21 11:43:16 2019
New Revision: 277252
URL: https://gcc.gnu.org/viewcvs?rev=277252&root=gcc&view=rev
Log:
Backported from mainline
2019-09-27 Jakub Jelinek <jakub@redhat.com>
PR middle-end/91920
* gimplify.c (omp_default_clause): Predetermine DECL_IN_CONSTANT_POOL
variables as shared.
* c-c++-common/gomp/pr91920.c: New test.
Added:
branches/gcc-9-branch/gcc/testsuite/c-c++-common/gomp/pr91920.c
Modified:
branches/gcc-9-branch/gcc/ChangeLog
branches/gcc-9-branch/gcc/gimplify.c
branches/gcc-9-branch/gcc/testsuite/ChangeLog
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/88203] assert does not compile with OpenMP's pragma omp parallel for default(none)
Date: Mon, 21 Oct 2019 11:45:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88203
--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Mon Oct 21 11:44:53 2019
New Revision: 277253
URL: https://gcc.gnu.org/viewcvs?rev=277253&root=gcc&view=rev
Log:
Backported from mainline
2019-09-27 Jakub Jelinek <jakub@redhat.com>
PR c++/88203
* c-common.h (c_omp_predefined_variable): Declare.
* c-omp.c (c_omp_predefined_variable): New function.
(c_omp_predetermined_sharing): Return OMP_CLAUSE_DEFAULT_SHARED
for predefined variables.
* c-parser.c (c_parser_predefined_identifier): New function.
(c_parser_postfix_expression): Use it.
(c_parser_omp_variable_list): Parse predefined identifiers.
* c-typeck.c (c_finish_omp_clauses): Allow predefined variables
in shared and firstprivate clauses, even when they are predetermined
shared.
* parser.c (cp_parser_omp_var_list_no_open): Parse predefined
variables.
* semantics.c (finish_omp_clauses): Allow predefined variables in
shared and firstprivate clauses, even when they are predetermined
shared.
* cp-gimplify.c (cxx_omp_predetermined_sharing_1): Return
OMP_CLAUSE_DEFAULT_SHARED for predefined variables.
* c-c++-common/gomp/pr88203-1.c: New test.
* c-c++-common/gomp/pr88203-2.c: New test.
* c-c++-common/gomp/pr88203-3.c: New test.
Added:
branches/gcc-9-branch/gcc/testsuite/c-c++-common/gomp/pr88203-1.c
branches/gcc-9-branch/gcc/testsuite/c-c++-common/gomp/pr88203-2.c
branches/gcc-9-branch/gcc/testsuite/c-c++-common/gomp/pr88203-3.c
Modified:
branches/gcc-9-branch/gcc/c-family/ChangeLog
branches/gcc-9-branch/gcc/c-family/c-common.h
branches/gcc-9-branch/gcc/c-family/c-omp.c
branches/gcc-9-branch/gcc/c/ChangeLog
branches/gcc-9-branch/gcc/c/c-parser.c
branches/gcc-9-branch/gcc/c/c-typeck.c
branches/gcc-9-branch/gcc/cp/ChangeLog
branches/gcc-9-branch/gcc/cp/cp-gimplify.c
branches/gcc-9-branch/gcc/cp/parser.c
branches/gcc-9-branch/gcc/cp/semantics.c
branches/gcc-9-branch/gcc/testsuite/ChangeLog
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Subject: [Bug bootstrap/90543] Build failure on MINGW for gcc-9.1.0
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90543
--- Comment #14 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Mon Oct 21 11:45:27 2019
New Revision: 277254
URL: https://gcc.gnu.org/viewcvs?rev=277254&root=gcc&view=rev
Log:
Backported from mainline
2019-09-29 Jakub Jelinek <jakub@redhat.com>
PR bootstrap/90543
* optc-save-gen.awk: Fix up printing string option differences.
Modified:
branches/gcc-9-branch/gcc/ChangeLog
branches/gcc-9-branch/gcc/optc-save-gen.awk
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Subject: [Bug c++/91925] [9/10 Regression] -fpack-struct causes a decltype with template to ICE
Date: Mon, 21 Oct 2019 11:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91925
--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Mon Oct 21 11:46:21 2019
New Revision: 277255
URL: https://gcc.gnu.org/viewcvs?rev=277255&root=gcc&view=rev
Log:
Backported from mainline
2019-10-01 Jakub Jelinek <jakub@redhat.com>
PR c++/91925
* c-warn.c (check_alignment_of_packed_member): Ignore FIELD_DECLs
with NULL DECL_FIELD_OFFSET.
* g++.dg/conversion/packed2.C: New test.
Added:
branches/gcc-9-branch/gcc/testsuite/g++.dg/conversion/packed2.C
Modified:
branches/gcc-9-branch/gcc/c-family/ChangeLog
branches/gcc-9-branch/gcc/c-family/c-warn.c
branches/gcc-9-branch/gcc/testsuite/ChangeLog
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Subject: [Bug c++/91974] function not sequenced before function argument
Date: Mon, 21 Oct 2019 11:47:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91974
--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Mon Oct 21 11:47:09 2019
New Revision: 277256
URL: https://gcc.gnu.org/viewcvs?rev=277256&root=gcc&view=rev
Log:
Backported from mainline
2019-10-04 Jakub Jelinek <jakub@redhat.com>
PR c++/91974
* cp-gimplify.c (cp_gimplify_expr) <case CALL_EXPR>: For
-fstrong-eval-order ensure CALL_EXPR_FN side-effects are evaluated
before any arguments. Additionally, ensure CALL_EXPR_FN that isn't
invariant nor OBJ_TYPE_REF nor SSA_NAME is forced into a temporary.
* g++.dg/cpp1z/eval-order5.C: New test.
Added:
branches/gcc-9-branch/gcc/testsuite/g++.dg/cpp1z/eval-order5.C
Modified:
branches/gcc-9-branch/gcc/cp/ChangeLog
branches/gcc-9-branch/gcc/cp/cp-gimplify.c
branches/gcc-9-branch/gcc/testsuite/ChangeLog
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Subject: [Bug tree-optimization/91734] gcc skip an if statement with "-O1 -ffast-math"
Date: Mon, 21 Oct 2019 11:48:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91734
--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Mon Oct 21 11:48:00 2019
New Revision: 277257
URL: https://gcc.gnu.org/viewcvs?rev=277257&root=gcc&view=rev
Log:
Backported from mainline
2019-10-05 Jakub Jelinek <jakub@redhat.com>
PR tree-optimization/91734
* generic-match-head.c: Include fold-const-call.h.
* match.pd (sqrt(x) cmp c): Check the boundary value and
in case inexact computation of c*c affects comparison of the boundary,
turn LT_EXPR into LE_EXPR, GE_EXPR into GT_EXPR, LE_EXPR into LT_EXPR
or GT_EXPR into GE_EXPR. Punt for sqrt comparisons against NaN and
for -frounding-math. For c2, try the next smaller or larger floating
point constant depending on comparison code and if it has the same
sqrt as c2, use it instead of c2.
* gcc.dg/pr91734.c: New test.
Added:
branches/gcc-9-branch/gcc/testsuite/gcc.dg/pr91734.c
Modified:
branches/gcc-9-branch/gcc/ChangeLog
branches/gcc-9-branch/gcc/generic-match-head.c
branches/gcc-9-branch/gcc/match.pd
branches/gcc-9-branch/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/87752] ICE in omp_add_variable, at gimplify.c:6776
Date: Mon, 21 Oct 2019 11:49:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87752
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Mon Oct 21 11:48:34 2019
New Revision: 277258
URL: https://gcc.gnu.org/viewcvs?rev=277258&root=gcc&view=rev
Log:
Backported from mainline
2019-10-17 Jakub Jelinek <jakub@redhat.com>
PR fortran/87752
* gfortran.dg/gomp/pr87752.f90: New test.
Added:
branches/gcc-9-branch/gcc/testsuite/gfortran.dg/gomp/pr87752.f90
Modified:
branches/gcc-9-branch/gcc/testsuite/ChangeLog
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Subject: [Bug tree-optimization/92056] [10 Regression] ice in expr_object_size, at tree-object-si ze.c:675 with -O3
Date: Mon, 21 Oct 2019 11:49:00 -0000
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--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Mon Oct 21 11:49:18 2019
New Revision: 277259
URL: https://gcc.gnu.org/viewcvs?rev=277259&root=gcc&view=rev
Log:
Backported from mainline
2019-10-17 Jakub Jelinek <jakub@redhat.com>
PR tree-optimization/92056
* tree-object-size.c (cond_expr_object_size): Return early if then_
processing resulted in unknown size.
* gcc.c-torture/compile/pr92056.c: New test.
Added:
branches/gcc-9-branch/gcc/testsuite/gcc.c-torture/compile/pr92056.c
Modified:
branches/gcc-9-branch/gcc/ChangeLog
branches/gcc-9-branch/gcc/testsuite/ChangeLog
branches/gcc-9-branch/gcc/tree-object-size.c
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Subject: [Bug tree-optimization/91351] [9 Regression] -fstrict-enums generates incorrect code
Date: Mon, 21 Oct 2019 11:54:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #16 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed for 9.3+ too.
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Subject: [Bug middle-end/91623] [7/8 Regression] -msse4.1 -O3 segfault in /usr/lib/gcc/x86_64-pc-linux-gnu/8.3.0/include/smmintrin.h:270:10
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[7/8/9 Regression] -msse4.1 |[7/8 Regression] -msse4.1
|-O3 segfault in |-O3 segfault in
|/usr/lib/gcc/x86_64-pc-linu |/usr/lib/gcc/x86_64-pc-linu
|x-gnu/8.3.0/include/smmintr |x-gnu/8.3.0/include/smmintr
|in.h:270:10 |in.h:270:10
--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed for 9.3+ too.
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Subject: =?UTF-8?B?W0J1ZyBsdG8vOTE1NzJdIFs5IFJlZ3Jlc3Npb25dIGx0bzE6IGVycm9yOiB0?= =?UTF-8?B?eXBlIHZhcmlhbnQgaGFzIGRpZmZlcmVudCDigJhUUkVFX1RZUEXigJkgc2lu?= =?UTF-8?B?Y2UgcjI2OTg2Mg==?Date: Mon, 21 Oct 2019 11:57:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |9.2.1
Resolution|--- |FIXED
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed for 9.3+ too.
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Subject: [Bug tree-optimization/91665] [8 Regression] ICE in build_vector_from_val, at tree.c:1904
Date: Mon, 21 Oct 2019 11:58:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |9.2.1
Summary|[8/9 Regression] ICE in |[8 Regression] ICE in
|build_vector_from_val, at |build_vector_from_val, at
|tree.c:1904 |tree.c:1904
--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed for 9.3+ too.
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Subject: [Bug middle-end/91001] internal compiler error: in extract_insn, at recog.c:2310
Date: Mon, 21 Oct 2019 11:58:00 -0000
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--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed for 9.3+ too.
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Subject: [Bug tree-optimization/91723] [9 Regression] builtin fma is not optimized or vectorized as *+
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed for 9.3+ too.
>From gcc-bugs-return-657009-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Oct 21 12:00:42 2019
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Subject: [Bug middle-end/91920] ggc 9.2.0 failing openmp compile on ppc64le
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
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Target Milestone|--- |9.3
--- Comment #16 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed for 9.3+ too. 8.x and earlier shouldn't have the problem, as readonly
variables are predetermined shared there.
>From gcc-bugs-return-657010-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Oct 21 12:05:38 2019
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Subject: [Bug c/92164] Wrong result using builtin rint/rintf optimization in x86_64
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--- Comment #3 from Steffen Schmidt <steffen-schmidt at siemens dot com> ---
Thanks for the quick reply.
Just tested using -frounding-math and it seems to fix the issue.
Sorry, I was not aware of this option, according to GCCs manual it is
experimental.
Please correct me if I'm wrong, but my expectation would be, assuming a correct
program, switching from -O0 to -O1 should not influence the runtime result.
>From gcc-bugs-return-657011-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Oct 21 12:06:12 2019
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Subject: [Bug c++/88203] assert does not compile with OpenMP's pragma omp parallel for default(none)
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Version|unknown |8.2.1
--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed for 9.3+ too.
>From gcc-bugs-return-657012-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Oct 21 12:06:53 2019
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Subject: [Bug c++/91925] [9/10 Regression] -fpack-struct causes a decltype with template to ICE
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed for 9.3+.
>From gcc-bugs-return-657013-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Oct 21 12:07:50 2019
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Subject: [Bug c++/91974] function not sequenced before function argument
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--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The originally reported issue fixed for 9.3+ too. Not really sure if it is a
good idea to backport the shift and array ref changes, those are quite
invasive.
>From gcc-bugs-return-657014-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Oct 21 12:11:28 2019
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Alexander Monakov <amonakov at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |amonakov at gcc dot gnu.org
--- Comment #3 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
>> (or write actual assembly rather than using inline-asm).
> In this case, yes -- I now declare the function "naked" and avoid the issue.
I think this solution (hand-writing asm for the entire function) is generally
undesirable because you become responsible for ABI/calling convention, the
compiler won't help you with things like properly restoring callee-saved
registers, and violations may stay unnoticed as long as callers don't try to
use a particular callee-saved reg.
Here's a manually reduced variant that exhibits a similar issue at -O1:
void foo(int num, int c) {
asm("# %0" : "+r"(num));
while (--c)
asm goto("# %0" :: "r"(num) :: l2);
l2:
asm("# %0" :: "r"(num));
}
The main issue seems to be our 'asmcons' pass transforming RTL in such a way
that REG_DEAD notes are "behind" the actual death, so if the RA takes them
literally it operates on wrong (too conservative) lifetime information; e.g.,
for the first asm, just before IRA we have:
(insn 29 4 8 2 (set (reg:SI 84 [ num ])
(reg:SI 85)) "./example.c":3:5 -1
(nil))
(insn 8 29 7 2 (parallel [
(set (reg:SI 84 [ num ])
(asm_operands:SI ("# %0") ("=r") 0 [
(reg:SI 84 [ num ])
]
[
(asm_input:SI ("0") ./example.c:3)
]
[] ./example.c:3))
(clobber (reg:CC 17 flags))
]) "./example.c":3:5 -1
(expr_list:REG_DEAD (reg:SI 85)
(expr_list:REG_UNUSED (reg:CC 17 flags)
(nil))))
but register 85 actually dies in insn 29, not in insn 8.
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Subject: [Bug tree-optimization/92163] [10 Regression] ICE: Segmentation fault (in bitmap_set_bit)
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Last reconfirmed| |2019-10-21
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r276681.
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Subject: [Bug ipa/92160] The control variable of TLS variable alias be removed when use emutls(--enable-tls=no)
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--- Comment #1 from Pom <unclepom at sina dot com> ---
full source code:
#define TLS __thread
TLS int oldname = 7;
extern TLS int newname __attribute__((alias("oldname")));
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--- Comment #2 from Pom <unclepom at sina dot com> ---
Created attachment 47073
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47073&action=edit
test code and makefile
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Subject: [Bug tree-optimization/92163] [10 Regression] ICE: Segmentation fault (in bitmap_set_bit)
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
tree-ssa-dse.c assumes need_eh_cleanup bitmap (which is static) is initialized
at the start of the pass and handled at the end.
So, do we need to add functions (init and fini) which ifcvt can call, or just
not consider in the ifcvt local dce stores that can throw, something else?
>From gcc-bugs-return-657019-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Oct 21 12:59:51 2019
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Subject: [Bug tree-optimization/91665] [8 Regression] ICE in build_vector_from_val, at tree.c:1904
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David Binderman <dcb314 at hotmail dot com> changed:
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--- Comment #11 from David Binderman <dcb314 at hotmail dot com> ---
I see something similar here. Flag -O3 required.
Bug seems to start sometime between revision 277050 and 277100.
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Subject: [Bug tree-optimization/92162] [10 Regression] ICE in vect_create_epilog_for_reduction, at tree-vect-loop.c:4252
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |10.0
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Subject: [Bug tree-optimization/92162] [10 Regression] ICE in vect_create_epilog_for_reduction, at tree-vect-loop.c:4252
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--- Comment #2 from David Binderman <dcb314 at hotmail dot com> ---
Another test case seems to be:
double *a;
b() {
int c, d = 1;
for (; c < b; c++)
for (; c < b; c++)
if (a[c])
d = 0;
if (d)
e();
}
-O3 required for this case. Bug seems to start sometime between
revision 277050 and 277010.
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Subject: [Bug tree-optimization/91665] [8 Regression] ICE in build_vector_from_val, at tree.c:1904
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--- Comment #12 from David Binderman <dcb314 at hotmail dot com> ---
Scratch my comment. Wrong bug report. Sorry.
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Subject: [Bug tree-optimization/92162] [10 Regression] ICE in vect_create_epilog_for_reduction, at tree-vect-loop.c:4252
Date: Mon, 21 Oct 2019 13:14:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92162
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Seems to hit 416.gamess as well. Patch in testing.
>From gcc-bugs-return-657024-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Oct 21 13:17:06 2019
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Subject: [Bug c/92164] Wrong result using builtin rint/rintf optimization in x86_64
Date: Mon, 21 Oct 2019 13:17:00 -0000
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Steffen Schmidt from comment #3)
> Thanks for the quick reply.
>
> Just tested using -frounding-math and it seems to fix the issue.
> Sorry, I was not aware of this option, according to GCCs manual it is
> experimental.
>
> Please correct me if I'm wrong, but my expectation would be, assuming a
> correct program, switching from -O0 to -O1 should not influence the runtime
> result.
GCC assumes you do not mess with the floating-point state but round-to-nearest
is in effect. You have to use -frounding-math to remove this assumption but
then still correct operation isn't guaranteed (thus the "experimental" tag
for this option).
>From gcc-bugs-return-657025-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Oct 21 13:21:14 2019
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Subject: [Bug c/92164] Wrong result using builtin rint/rintf optimization in x86_64
Date: Mon, 21 Oct 2019 13:21:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92164
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Note that if GCC would be standards-conforming here your program would still
need
#pragma STDC FENV_ACCESS ON
since you are accessing and modifying the floating-point state (where the
pragma has no effect for GCC)
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Subject: [Bug c/92164] Wrong result using builtin rint/rintf optimization in x86_64
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--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
See PR34678 for issues of -frounding-math.
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Subject: [Bug tree-optimization/92162] [10 Regression] ICE in vect_create_epilog_for_reduction, at tree-vect-loop.c:4252
Date: Mon, 21 Oct 2019 13:43:00 -0000
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Oct 21 13:43:19 2019
New Revision: 277261
URL: https://gcc.gnu.org/viewcvs?rev=277261&root=gcc&view=rev
Log:
2019-10-21 Richard Biener <rguenther@suse.de>
PR tree-optimization/92162
* tree-vect-loop.c (vect_create_epilog_for_reduction): Lookup
STMT_VINFO_REDUC_IDX in reduc_info.
* tree-vect-stmts.c (vectorizable_condition): Likewise.
* gcc.dg/pr92162.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/pr92162.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-vect-loop.c
trunk/gcc/tree-vect-stmts.c
>From gcc-bugs-return-657028-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Oct 21 13:46:27 2019
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Subject: [Bug tree-optimization/92162] [10 Regression] ICE in vect_create_epilog_for_reduction, at tree-vect-loop.c:4252
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug target/90835] Incompatibilities with macOS 10.15 headers
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Iain Sandoe <iains at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |meta-bug
Blocks| |90709
Depends on| |66970
--- Comment #16 from Iain Sandoe <iains at gcc dot gnu.org> ---
I think to make this into a meta-bug, with dependencies on:
__has_builtin () - PR 66970
__has_feature ()
__has_extension ()
__attribute__((__availability__(....)))
which depends on __attribute__((__unavailable__(...)))
Martin Sebor has posted a patch for PR 66970 and i have patches in progress for
__has_fature/extension and __attribute__((__unavailable__()))
(I will create PRs for the other deps. in due course)
At the moment, I'm a bit reluctant to jam __has_xxxx => 0 in Darwin startup
code, since that might well produce wrong effects on headers that are already
adjusted (i.e. the compiler would report that __has_xxx was defined, but that
all the facilities were non-existent - which is a different state from
reporting hat __has_xxx is not present).
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66970
[Bug 66970] Add __has_builtin() macro
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90709
[Bug 90709] [meta-bug] GNU Objective C (C++) cannot consume current headers on
Darwin platforms.
>From gcc-bugs-return-657030-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Oct 21 14:40:31 2019
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Subject: [Bug testsuite/92165] New: [10 regression] g++.dg/cpp2a/nodiscard-once.C fails starting with r277205
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Bug ID: 92165
Summary: [10 regression] g++.dg/cpp2a/nodiscard-once.C fails
starting with r277205
Product: gcc
Version: 10.0
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Target Milestone: ---
Executing on host: /home/seurer/gcc/build/gcc-test/gcc/testsuite/g++/../../xg++
-B/home/seurer/gcc/build/gcc-test/gcc/testsuite/g++/../../
/home/seurer/gcc/gcc-test/gcc/testsuite/g++.dg/cpp2a/nodiscard-once.C
-fno-diagnostics-show-caret -fno-diagnostics-show-line-numbers
-fdiagnostics-color=never -fdiagnostics-urls=never -nostdinc++
-I/home/seurer/gcc/build/gcc-test/powerpc64-unknown-linux-gnu/libstdc++-v3/include/powerpc64-unknown-linux-gnu
-I/home/seurer/gcc/build/gcc-test/powerpc64-unknown-linux-gnu/libstdc++-v3/include
-I/home/seurer/gcc/gcc-test/libstdc++-v3/libsupc++
-I/home/seurer/gcc/gcc-test/libstdc++-v3/include/backward
-I/home/seurer/gcc/gcc-test/libstdc++-v3/testsuite/util -fmessage-length=0
-std=gnu++2a -O -ftrack-macro-expansion=0 -S -o nodiscard-once.s (timeout =
300)
spawn -ignore SIGHUP
/home/seurer/gcc/build/gcc-test/gcc/testsuite/g++/../../xg++
-B/home/seurer/gcc/build/gcc-test/gcc/testsuite/g++/../../
/home/seurer/gcc/gcc-test/gcc/testsuite/g++.dg/cpp2a/nodiscard-once.C
-fno-diagnostics-show-caret -fno-diagnostics-show-line-numbers
-fdiagnostics-color=never -fdiagnostics-urls=never -nostdinc++
-I/home/seurer/gcc/build/gcc-test/powerpc64-unknown-linux-gnu/libstdc++-v3/include/powerpc64-unknown-linux-gnu
-I/home/seurer/gcc/build/gcc-test/powerpc64-unknown-linux-gnu/libstdc++-v3/include
-I/home/seurer/gcc/gcc-test/libstdc++-v3/libsupc++
-I/home/seurer/gcc/gcc-test/libstdc++-v3/include/backward
-I/home/seurer/gcc/gcc-test/libstdc++-v3/testsuite/util -fmessage-length=0
-std=gnu++2a -O -ftrack-macro-expansion=0 -S -o nodiscard-once.s
/home/seurer/gcc/gcc-test/gcc/testsuite/g++.dg/cpp2a/nodiscard-once.C:5:14:
error: attribute 'nodiscard' can appear at most once in an attribute-list
/home/seurer/gcc/gcc-test/gcc/testsuite/g++.dg/cpp2a/nodiscard-once.C: In
function 'void test()':
/home/seurer/gcc/gcc-test/gcc/testsuite/g++.dg/cpp2a/nodiscard-once.C:10:10:
warning: ignoring return value of 'int check1()', declared with attribute
'nodiscard' [-Wunused-result]
/home/seurer/gcc/gcc-test/gcc/testsuite/g++.dg/cpp2a/nodiscard-once.C:5:30:
note: declared here
compiler exited with status 1
PASS: g++.dg/cpp2a/nodiscard-once.C -std=gnu++2a (test for errors, line 5)
FAIL: g++.dg/cpp2a/nodiscard-once.C -std=gnu++2a (test for excess errors)
Excess errors:
/home/seurer/gcc/gcc-test/gcc/testsuite/g++.dg/cpp2a/nodiscard-once.C:10:10:
warning: ignoring return value of 'int check1()', declared with attribute
'nodiscard' [-Wunused-result]
testcase /home/seurer/gcc/gcc-test/gcc/testsuite/g++.dg/dg.exp completed in 0
seconds
=== g++ Summary ===
# of expected passes 1
# of unexpected failures 1
# of unsupported tests 3
>From gcc-bugs-return-657031-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Oct 21 14:44:40 2019
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Subject: [Bug tree-optimization/92166] New: [10 regression] ICE compiling gcc.dg/vshift-5.c starting with r277241
Date: Mon, 21 Oct 2019 14:44:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92166
Bug ID: 92166
Summary: [10 regression] ICE compiling gcc.dg/vshift-5.c
starting with r277241
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
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Executing on host: /home/seurer/gcc/build/gcc-test2/gcc/xgcc
-B/home/seurer/gcc/build/gcc-test2/gcc/
/home/seurer/gcc/gcc-test2/gcc/testsuite/gcc.dg/vshift-5.c
-fno-diagnostics-show-caret -fno-diagnostics-show-line-numbers
-fdiagnostics-color=never -fdiagnostics-urls=never -O3 -lm -o
./vshift-5.exe (timeout = 300)
spawn -ignore SIGHUP /home/seurer/gcc/build/gcc-test2/gcc/xgcc
-B/home/seurer/gcc/build/gcc-test2/gcc/
/home/seurer/gcc/gcc-test2/gcc/testsuite/gcc.dg/vshift-5.c
-fno-diagnostics-show-caret -fno-diagnostics-show-line-numbers
-fdiagnostics-color=never -fdiagnostics-urls=never -O3 -lm -o ./vshift-5.exe
during GIMPLE pass: slp
/home/seurer/gcc/gcc-test2/gcc/testsuite/gcc.dg/vshift-5.c: In function 'f2':
/home/seurer/gcc/gcc-test2/gcc/testsuite/gcc.dg/vshift-5.c:26:1: internal
compiler error: in operator[], at vec.h:859
0x10df142f vec<tree_node*, va_heap, vl_embed>::operator[](unsigned int)
/home/seurer/gcc/gcc-test2/gcc/vec.h:859
0x10df142f vec<tree_node*, va_heap, vl_ptr>::operator[](unsigned int)
/home/seurer/gcc/gcc-test2/gcc/vec.h:1425
0x10df142f vectorizable_shift
/home/seurer/gcc/gcc-test2/gcc/tree-vect-stmts.c:5842
0x10e0ac4b vect_transform_stmt(_stmt_vec_info*, gimple_stmt_iterator*,
_slp_tree*, _slp_instance*)
/home/seurer/gcc/gcc-test2/gcc/tree-vect-stmts.c:10812
0x10e3b69f vect_schedule_slp_instance
/home/seurer/gcc/gcc-test2/gcc/tree-vect-slp.c:3950
0x10e3b3ab vect_schedule_slp_instance
/home/seurer/gcc/gcc-test2/gcc/tree-vect-slp.c:3844
0x10e3dd2b vect_schedule_slp(vec_info*)
/home/seurer/gcc/gcc-test2/gcc/tree-vect-slp.c:4024
0x10e421d7 vect_slp_bb_region
/home/seurer/gcc/gcc-test2/gcc/tree-vect-slp.c:3076
0x10e421d7 vect_slp_bb(basic_block_def*)
/home/seurer/gcc/gcc-test2/gcc/tree-vect-slp.c:3170
0x10e4595b execute
/home/seurer/gcc/gcc-test2/gcc/tree-vectorizer.c:1309
>From gcc-bugs-return-657032-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Oct 21 14:52:19 2019
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Subject: [Bug testsuite/92165] [10 regression] g++.dg/cpp2a/nodiscard-once.C fails starting with r277205
Date: Mon, 21 Oct 2019 14:52:00 -0000
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--- Comment #1 from seurer at gcc dot gnu.org ---
Also these:
FAIL: g++.dg/cpp2a/nodiscard-reason.C -std=gnu++2a (test for warnings, line
16)
FAIL: g++.dg/cpp2a/nodiscard-reason.C -std=gnu++2a (test for warnings, line
17)
FAIL: g++.dg/cpp2a/nodiscard-reason.C -std=gnu++2a (test for warnings, line
176)
FAIL: g++.dg/cpp2a/nodiscard-reason.C -std=gnu++2a (test for warnings, line
178)
FAIL: g++.dg/cpp2a/nodiscard-reason.C -std=gnu++2a (test for warnings, line
183)
FAIL: g++.dg/cpp2a/nodiscard-reason.C -std=gnu++2a (test for warnings, line
185)
FAIL: g++.dg/cpp2a/nodiscard-reason.C -std=gnu++2a (test for warnings, line
190)
FAIL: g++.dg/cpp2a/nodiscard-reason.C -std=gnu++2a (test for warnings, line
192)
FAIL: g++.dg/cpp2a/nodiscard-reason.C -std=gnu++2a (test for excess errors)
>From gcc-bugs-return-657033-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Oct 21 14:55:58 2019
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Subject: [Bug testsuite/92165] [10 regression] g++.dg/cpp2a/nodiscard-once.C fails starting with r277205
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |phdofthehouse at gmail dot com
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
As I said on gcc-patches, my changes only unbroke testing altogether, before
there were tcl syntax errors, the actual tests were inroduced in r277200.
>From gcc-bugs-return-657034-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Oct 21 15:05:06 2019
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Subject: [Bug testsuite/92165] [10 regression] g++.dg/cpp2a/nodiscard-once.C fails starting with r277205
Date: Mon, 21 Oct 2019 15:05:00 -0000
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--- Comment #3 from JeanHeyd Meneide <phdofthehouse at gmail dot com> ---
Thanks for pinging me about this. I'm at a WG14 Meeting so I won't be able to
get to it immediately, but when I get back I'll get right on fixing!
>From gcc-bugs-return-657035-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Oct 21 15:34:11 2019
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Subject: [Bug c/92167] New: Poor source location choice for diagnostic in macro expansion
Date: Mon, 21 Oct 2019 15:34:00 -0000
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Bug ID: 92167
Summary: Poor source location choice for diagnostic in macro
expansion
Product: gcc
Version: 9.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Given a macro which expands to a function call and passes a macro argument as
an argument in that call, if the macro argument is parenthesized, a diagnostic
triggered by an improper argument in an invocation will be associated with the
macro definition rather than the invocation. For example:
-----------------------------
$ cat test.c
extern int a(void *);
#define b(x) a((x))
int c(int x) {return b(x);}
$ gcc-9.2.0 -c test.c
test.c: In function 'c':
test.c:2:16: warning: passing argument 1 of 'a' makes pointer from integer
without a cast [-Wint-conversion]
2 | #define b(x) a((x))
| ^~~
| |
| int
test.c:3:22: note: in expansion of macro 'b'
3 | int c(int x) {return b(x);}
| ^
test.c:1:14: note: expected 'void *' but argument is of type 'int'
1 | extern int a(void *);
| ^~~~~~
-----------------------------
The invocation is also shown as a note, but one must read through the list of
notes in order to find it rather than simply checking the line given with the
diagnostic itself. It would arguably be more useful to associate the
diagnostic with the macro invocation on line 3 and include the macro expansion
as a note, as Clang does:
-----------------------------
$ clang-9 -c test.c
test.c:3:22: warning: incompatible integer to pointer conversion passing 'int'
to parameter of type 'void *' [-Wint-conversion]
int c(int x) {return b(x);}
^~~~
test.c:2:16: note: expanded from macro 'b'
#define b(x) a((x))
^~~
test.c:1:20: note: passing argument to parameter here
extern int a(void *);
^
1 warning generated.
-----------------------------
If the macro parameter is used as is (not parenthesized), GCC does identify the
macro invocation as the diagnostic location:
-----------------------------
$ cat test2.c
extern int a(void *);
#define b(x) a(x)
int c(int x) {return b(x);}
$ gcc-9.2.0 -c test2.c
test.c: In function 'c':
test.c:3:24: warning: passing argument 1 of 'a' makes pointer from integer
without a cast [-Wint-conversion]
3 | int c(int x) {return b(x);}
| ^
| |
| int
test.c:2:16: note: in definition of macro 'b'
2 | #define b(x) a(x)
| ^
test.c:1:14: note: expected 'void *' but argument is of type 'int'
1 | extern int a(void *);
| ^~~~~~
-----------------------------
But this is not particularly helpful because most macro arguments must be
parenthesized to be used safely.
>From gcc-bugs-return-657036-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Oct 21 16:01:30 2019
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Subject: [Bug c++/91548] [10 Regression] Regression in constexpr evaluation of std::array
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Hannes Hauswedell <h2+bugs at fsfe dot org> changed:
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----------------------------------------------------------------------------
CC| |h2+bugs at fsfe dot org
--- Comment #2 from Hannes Hauswedell <h2+bugs at fsfe dot org> ---
Any news on this issue? We are using this pattern in some rather central files
in our library and the bug literally breaks 90% of our unit tests so we can't
keep track of other gcc10 issues or try the new concepts support...
Thank you for your help!
>From gcc-bugs-return-657037-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Oct 21 16:19:36 2019
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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/91548] [10 Regression] Regression in constexpr evaluation of std::array
Date: Mon, 21 Oct 2019 16:19:00 -0000
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--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Sorry about that. I've been working on new C++20 features in the dwindling
stage 1 time, and kept kicking this can down the stage3 road. But hopefully
I'll get to this after posting my aggregate paren init patch, which should be
Real Soon.
Unfortunately, there's no way to turn off the const checking.
>From gcc-bugs-return-657038-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Oct 21 17:29:29 2019
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Paul Thomas <pault at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #2 from Paul Thomas <pault at gcc dot gnu.org> ---
Fixed under PR91926.
Thanks for the report
Paul
>From gcc-bugs-return-657039-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Oct 21 18:23:03 2019
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Subject: [Bug target/91481] POWER9 "DARN" RNG intrinsic produces repeated output (CVE-2019-15847)
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Kevin Shekleton <kevin.shekleton at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |kevin.shekleton at gmail dot com
--- Comment #20 from Kevin Shekleton <kevin.shekleton at gmail dot com> ---
Hi all. The NVD entry (https://nvd.nist.gov/vuln/detail/CVE-2019-15847)
specifies that gcc 10.0 will fix this issue. Of course, 10.0 is not yet
released and the 'Known to work' field on this Bugzilla entry states "10.0,
6.5.0, 7.4.1, 8.3.1, 9.2.1". Some questions:
1. Any ETA on when a fix versions will be released?
2. From the commits here it looks like this fix is being backported to match
the 'Known to work' field here (thanks!). Is the NVD entry going to be updated
to reflect accurate affected versions of gcc?
>From gcc-bugs-return-657040-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Oct 21 18:23:18 2019
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Subject: [Bug c++/92106] [8/9/10 Regression] ICE with structured bindings and -Wreturn-local-addr
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--- Comment #6 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Mon Oct 21 18:22:41 2019
New Revision: 277264
URL: https://gcc.gnu.org/viewcvs?rev=277264&root=gcc&view=rev
Log:
PR c++/92106 - ICE with structured bindings and -Wreturn-local-addr.
* typeck.c (maybe_warn_about_returning_address_of_local): Avoid
recursing on null initializer and return false instead.
* g++.dg/cpp1z/decomp50.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/cpp1z/decomp50.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/typeck.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-657041-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Oct 21 18:25:30 2019
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Subject: [Bug c++/92106] [8/9 Regression] ICE with structured bindings and -Wreturn-local-addr
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[8/9/10 Regression] ICE |[8/9 Regression] ICE with
|with structured bindings |structured bindings and
|and -Wreturn-local-addr |-Wreturn-local-addr
--- Comment #7 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed on trunk so far.
>From gcc-bugs-return-657042-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Oct 21 18:39:10 2019
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Subject: [Bug fortran/86248] [7/8/9/10 Regression] LEN_TRIM in specification expression causes link failure
Date: Mon, 21 Oct 2019 18:39:00 -0000
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--- Comment #5 from Bill Long <longb at cray dot com> ---
Any progress on this?
>From gcc-bugs-return-657043-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Oct 21 18:46:25 2019
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Subject: [Bug c++/92062] [9/10 Regression] ODR-use by static_assert ignored for static member of class template
Date: Mon, 21 Oct 2019 18:46:00 -0000
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--- Comment #5 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Mon Oct 21 18:45:45 2019
New Revision: 277266
URL: https://gcc.gnu.org/viewcvs?rev=277266&root=gcc&view=rev
Log:
PR c++/92062 - ODR-use ignored for static member of class template.
has_value_dependent_address wasn't stripping location wrappers so it
gave the wrong answer for "&x" in the static_assert. That led us to
thinking that the expression isn't instantiation-dependent, and we
skipped static initialization of A<0>::x.
This patch adds stripping so that has_value_dependent_address gives the
same answer as it used to before the location wrappers addition.
* pt.c (has_value_dependent_address): Strip location wrappers.
* g++.dg/cpp0x/constexpr-odr1.C: New test.
* g++.dg/cpp0x/constexpr-odr2.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-odr1.C
trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-odr2.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/pt.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-657044-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Oct 21 18:47:07 2019
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Subject: [Bug c++/92062] [9 Regression] ODR-use by static_assert ignored for static member of class template
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[9/10 Regression] ODR-use |[9 Regression] ODR-use by
|by static_assert ignored |static_assert ignored for
|for static member of class |static member of class
|template |template
--- Comment #6 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed on trunk so far.
>From gcc-bugs-return-657045-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Oct 21 18:52:19 2019
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Subject: [Bug c++/92015] [9/10 Regression] internal compiler error: in cxx_eval_array_reference, at cp/constexpr.c:2568
Date: Mon, 21 Oct 2019 18:52:00 -0000
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Mon Oct 21 18:51:43 2019
New Revision: 277267
URL: https://gcc.gnu.org/viewcvs?rev=277267&root=gcc&view=rev
Log:
PR c++/92015
* constexpr.c (cxx_eval_component_reference, cxx_eval_bit_field_ref):
Use STRIP_ANY_LOCATION_WRAPPER on CONSTRUCTOR elts.
* g++.dg/cpp0x/constexpr-92015.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-92015.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/constexpr.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug target/92168] New: Poor code generation for addcarry / subborrow
Date: Mon, 21 Oct 2019 18:59:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92168
Bug ID: 92168
Summary: Poor code generation for addcarry / subborrow
Product: gcc
Version: 9.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: dje at gcc dot gnu.org
Target Milestone: ---
Target: x86_64-*-*
Real World Technology reader reports poor GCC code generation relative to Clang
and MSVC for source code involving carry / borrow.
https://www.realworldtech.com/forum/?threadid=188061&curpostid=188061
with example at Compiler Explorer
https://godbolt.org/z/YYq6ou
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Subject: [Bug target/92168] Poor code generation for addcarry / subborrow
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--- Comment #1 from David Edelsohn <dje at gcc dot gnu.org> ---
Created attachment 47074
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47074&action=edit
Source code example from Compiler Explorer
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Subject: [Bug target/92168] Poor code generation for addcarry / subborrow
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David Edelsohn <dje at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-10-21
CC| |hjl.tools at gmail dot com,
| |jakub at gcc dot gnu.org,
| |uros at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #2 from David Edelsohn <dje at gcc dot gnu.org> ---
Confirmed.
>From gcc-bugs-return-657049-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Oct 21 19:08:00 2019
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Subject: [Bug c++/92015] [9/10 Regression] internal compiler error: in cxx_eval_array_reference, at cp/constexpr.c:2568
Date: Mon, 21 Oct 2019 19:08:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed on the trunk so far.
>From gcc-bugs-return-657050-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Oct 21 20:05:57 2019
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Subject: [Bug target/91481] POWER9 "DARN" RNG intrinsic produces repeated output (CVE-2019-15847)
Date: Mon, 21 Oct 2019 20:05:00 -0000
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--- Comment #21 from Segher Boessenkool <segher at gcc dot gnu.org> ---
It will be fixed in the next releases of all still supported branches
(that's GCC 7, 8, and 9), and also in the upcoming GCC 10 release of
course.
If you are in a hurry, you can build your own compilers right now, the
problem has been fixed in all open release branches.
If, alternatively, you get your GCC from some distribution, ask them
about *their* release plans. We don't know.
No future releases for GCC have been announced. Judging from historical
trends the next (and last) GCC 7 release (7.5) will be in November, GCC 8
(8.4) in December, GCC 9 (9.3) in Februari, and GCC 10 (10.1) will be
there in May. This is just *my* estimate, your mileage may vary, etc.
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Subject: [Bug target/91481] POWER9 "DARN" RNG intrinsic produces repeated output (CVE-2019-15847)
Date: Mon, 21 Oct 2019 20:09:00 -0000
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--- Comment #22 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Segher Boessenkool from comment #21)
> No future releases for GCC have been announced. Judging from historical
> trends the next (and last) GCC 7 release (7.5) will be in November, GCC 8
> (8.4) in December, GCC 9 (9.3) in Februari, and GCC 10 (10.1) will be
> there in May. This is just *my* estimate, your mileage may vary, etc.
See https://gcc.gnu.org/develop.html/timeline for dates of point releases from
the release branches, which can be used to judge the historical trends for
yourself.
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Subject: [Bug target/91481] POWER9 "DARN" RNG intrinsic produces repeated output (CVE-2019-15847)
Date: Mon, 21 Oct 2019 20:09:00 -0000
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--- Comment #23 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #22)
> See https://gcc.gnu.org/develop.html/timeline
Sorry, that should be https://gcc.gnu.org/develop.html#timeline
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Subject: [Bug c++/92169] New: crash on referring to a local class member by unqualified name from outside the enclosing function
Date: Mon, 21 Oct 2019 20:18:00 -0000
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Bug ID: 92169
Summary: crash on referring to a local class member by
unqualified name from outside the enclosing function
Product: gcc
Version: unknown
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Priority: P3
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[Probably no-one will ever write code like this outside a compiler test case,
but filing just in case this affects non-contrived situations.]
This code crashes every version of g++ that supports deduced return types:
auto f() {
static int n;
struct Y {
static int &g() { return n; }
struct X {
int &get();
};
};
return Y::X();
};
using X = decltype(f());
int &X::get() { return g(); }
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Subject: [Bug gcov-profile/83434] [GCOV] A label after a non-executed if statement is wrongly marked as not executed in gcov
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--- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Mon Oct 21 20:19:28 2019
New Revision: 277270
URL: https://gcc.gnu.org/viewcvs?rev=277270&root=gcc&view=rev
Log:
PR c++/83434 - typeinfo for noexcept function lacks noexcept information
2019-10-21 Kamlesh Kumar <kamleshbhalui@gmail.com>
* rtti.c (get_tinfo_decl_dynamic): Do not call
TYPE_MAIN_VARIANT for function.
(get_typeid): Likewise.
* g++.dg/rtti/pr83534.C: New Test.
Reviewed-by: Jason Merrill <jason@redhat.com>
Added:
trunk/gcc/testsuite/g++.dg/rtti/pr83534.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/rtti.c
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Subject: [Bug target/92168] Poor code generation for addcarry / subborrow
Date: Mon, 21 Oct 2019 20:55:00 -0000
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--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> ---
[hjl@gnu-cfl-1 gcc]$ cat c.c
#include <x86intrin.h>
unsigned char
foo (unsigned long long HxL0, unsigned long long LxH0,
unsigned long long HxL1, unsigned long long LxH1)
{
unsigned char carry;
carry = _addcarry_u64(0, HxL0, LxH0, &HxL0);
carry = _addcarry_u64(carry, HxL1, LxH1, &HxL1);
return carry;
}
[hjl@gnu-cfl-1 gcc]$ gcc -S -O2 c.c
[hjl@gnu-cfl-1 gcc]$ cat c.s
.file "c.c"
.text
.p2align 4
.globl foo
.type foo, @function
foo:
.LFB5519:
.cfi_startproc
addq %rsi, %rdi
setc %al
addb $-1, %al
adcq %rdx, %rcx
setc %al
ret
.cfi_endproc
.LFE5519:
.size foo, .-foo
.ident "GCC: (GNU) 9.2.1 20190827 (Red Hat 9.2.1-1)"
.section .note.GNU-stack,"",@progbits
[hjl@gnu-cfl-1 gcc]$ clang -S -O2 c.c
[hjl@gnu-cfl-1 gcc]$ cat c.s
.text
.file "c.c"
.globl foo # -- Begin function foo
.p2align 4, 0x90
.type foo,@function
foo: # @foo
.cfi_startproc
# %bb.0:
addq %rsi, %rdi
adcq %rcx, %rdx
setb %al
retq
.Lfunc_end0:
.size foo, .Lfunc_end0-foo
.cfi_endproc
# -- End function
.ident "clang version 8.0.0 (Fedora 8.0.0-1.fc30)"
.section ".note.GNU-stack","",@progbits
.addrsig
[hjl@gnu-cfl-1 gcc]$
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Subject: [Bug target/91481] POWER9 "DARN" RNG intrinsic produces repeated output (CVE-2019-15847)
Date: Mon, 21 Oct 2019 20:58:00 -0000
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--- Comment #24 from Kevin Shekleton <shek.spam+gcc at gmail dot com> ---
Thanks, Segher. You mentioned 9.3 -- does that mean there won't be a 9.2.1
release? If so, will the 'Known to work' field here be updated?
Also, will someone from the GCC team request an update to the NVD database to
correct the affected release versions?
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Subject: [Bug target/91481] POWER9 "DARN" RNG intrinsic produces repeated output (CVE-2019-15847)
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--- Comment #25 from Segher Boessenkool <segher at gcc dot gnu.org> ---
There is no 9.2.1 release, and there will not be one either.
See https://gcc.gnu.org/develop.html for how our numbering scheme works.
Very briefly, if the second number is 0, or the third number is *not* zero,
it isn't a release but some development version.
I have nothing to do with the NVD, and not with https://cve.mitre.org/ either.
I didn't request a CVE for this. I am merely the maintainer of this code, I
am not involved with the vulnerability circus.
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Subject: [Bug driver/92170] New: Incorrect function names output when using -fstack-usage on C++
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92170
Bug ID: 92170
Summary: Incorrect function names output when using
-fstack-usage on C++
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: driver
Assignee: unassigned at gcc dot gnu.org
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Created attachment 47075
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47075&action=edit
example source
When test.cc is compiled as follows:
g++ -c -fstack-usage test.cc
test.su contents appears as follows:
test.cc:12:34:<lambda(void*)> 16 static
test.cc:12:34:static void<lambda(void*)>::_FUN(void*) 24 static
test.cc:12:34:<lambda(void*)>::operator void (*)(void*)() const 16 static
test.cc:8:11:)>::fptr_t) [with RetT = void; ArgTs = {}] 16 static
test.cc:20:12:void __static_initialization_and_destruction_0(int, int) 48
static
test.cc:20:12:cc) 16 static
expected test.su contents as follows:
test.cc:12:26:<lambda(void*)> 16 static
test.cc:12:26:static void<lambda(void*)>::_FUN(void*) 24 static
test.cc:12:26:<lambda(void*)>::operator void (*)(void*)() const 16 static
test.cc:8:11:function_ref<RetT(ArgTs
...)>::function_ref(function_ref<RetT(ArgTs ...)>::fptr_t) [with RetT = void;
ArgTs = {}] 16 static
test.cc:20:12:void __static_initialization_and_destruction_0(int, int) 48
static
test.cc:20:12:(static initializers for test.cc) 16 static
This appears to be caused by code in output_stack_usage in toplev.c searching
for "." in the function name and only outputting after that point.
It is unclear to me what the intent was originally, but it dates back to the
original stack usage support commit (990495a75cd7).
I achieved the expected output shown above by applying the below patch to
disable the checks:
diff --git a/gcc/toplev.c b/gcc/toplev.c
index 1c7002f5c37..a0b6cefd2d1 100644
--- a/gcc/toplev.c
+++ b/gcc/toplev.c
@@ -981,6 +981,7 @@ output_stack_usage (void)
= strchr (IDENTIFIER_POINTER (DECL_NAME (current_function_decl)), '.');
const char *name
= lang_hooks.decl_printable_name (current_function_decl, 2);
+#if 0
if (suffix)
{
const char *dot = strchr (name, '.');
@@ -996,6 +997,7 @@ output_stack_usage (void)
if (dot)
name = dot + 1;
}
+#endif
fprintf (stack_usage_file,
"%s:%d:%d:%s\t" HOST_WIDE_INT_PRINT_DEC"\t%s\n",
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--- Comment #1 from Austin Morton <austinpmorton at gmail dot com> ---
Created attachment 47076
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current su output
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Subject: [Bug driver/92170] Incorrect function names output when using -fstack-usage on C++
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--- Comment #2 from Austin Morton <austinpmorton at gmail dot com> ---
Created attachment 47077
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expected su output
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Subject: [Bug driver/92170] Incorrect function names output when using -fstack-usage on C++
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--- Comment #3 from Austin Morton <austinpmorton at gmail dot com> ---
Created attachment 47078
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47078&action=edit
workaround patch
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Subject: [Bug target/91481] POWER9 "DARN" RNG intrinsic produces repeated output (CVE-2019-15847)
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91481
--- Comment #26 from Kevin Shekleton <shek.spam+gcc at gmail dot com> ---
Thanks for educating me on the numbering scheme, Segher. That's helpful info!
Florian - I see you requested the CVE. Will you be working to get the NVD entry
updated with the appropriate affected releases/fix versions?
>From gcc-bugs-return-657063-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Oct 21 21:34:54 2019
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From: "prathamesh3492 at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/92163] [10 Regression] ICE: Segmentation fault (in bitmap_set_bit)
Date: Mon, 21 Oct 2019 21:34:00 -0000
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--- Comment #3 from prathamesh3492 at gcc dot gnu.org ---
Created attachment 47079
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47079&action=edit
Untested fix
Does this patch look OK ?
Thanks,
Prathamesh
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From: "jonathan.poelen at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/92171] New: accept incorrect access of static constexpr member when read from a reference
Date: Mon, 21 Oct 2019 22:27:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92171
Bug ID: 92171
Summary: accept incorrect access of static constexpr member
when read from a reference
Product: gcc
Version: 9.2.0
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#include <type_traits>
struct A
{
static constexpr std::true_type value {};
};
int main()
{
A a;
A& ref = a;
constexpr bool r1 = a.value; //ok
constexpr bool r2 = ref.value; // this should not work
}
See https://bugs.llvm.org/show_bug.cgi?id=43732#c1
>From gcc-bugs-return-657065-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Oct 21 23:02:47 2019
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Subject: [Bug c/92172] New: ARM Thumb2 frame pointers inconsistent with clang and ARM-THUMB Procedure Call Standard
Date: Mon, 21 Oct 2019 23:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92172
Bug ID: 92172
Summary: ARM Thumb2 frame pointers inconsistent with clang and
ARM-THUMB Procedure Call Standard
Product: gcc
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This is a bit of a feature request, which has been rejected before, but I think
there are compelling reasons to reconsider.
The issue is described pretty well in this gcc-patches thread:
https://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg195725.html
And in this clang bug:
https://bugs.llvm.org/show_bug.cgi?id=18505
The request is to provide an option to make gcc's frame pointer behavior
consistent with clang, either with a special flag, or by default.
The behavior of frame pointers on ARM is a mess, with AAPCS not defining it,
the obsolete ARM-Thumb Procedure Call Standard (ATPCS) recommdending a frame
layout different than GCC and clang, and ARM's obsolete armcc compiler
implementing different semantics.
However, as of 2014, ARM's standard toolchain is "ARM Compiler 6", which
packages clang:
http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.subset.swdev.comp6/index.html
The Keil embedded toolchain, which is pretty industry-standard for ARM embedded
development, uses armclang:
http://www.keil.com/support/man/docs/armclang_ref/armclang_ref_vvi1466179578564.htm
Addressing some of the objections to modifying the frame layout from the
gcc-patches thread:
Wilco Dijkstra
<https://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg195782.html>:
> However changing the frame pointer like in the proposed patch
> will have a much larger cost - both in performance and codesize. You'd be
> lucky if it is less than 10%. This is due to placing the frame pointer at the
> top rather than the bottom of the frame, and that is very inefficient in Thumb-2.
I don't understand this objection. For a simple function the additional
overhead is literally nothing - for example <https://godbolt.org/z/BhvM2t>, GCC
generates:
push {r3, r4, r7, lr}
add r7, sp, #0
while clang adds a small constant to make r7 point to the previous r7 on the
stack, with lr immediately above - zero overhead:
push {r4, r6, r7, lr}
add r7, sp, #8
For a more complex function where the compiler has to spill r8-r11 one extra
instruction is required to generate the right frame layout - gcc generates:
push {r3, r4, r5, r6, r7, r8, r9, lr}
add r7, sp, #0
While clang generates:
push {r4, r5, r6, r7, lr}
add r7, sp, #12
push.w {r8, r9, r11}
Push (stmia) instructions take, at least on Cortex-M3, 1+N cycles, where N is
the number of registers saved. So clang's frame pointer approach takes one
extra cycle and 4 extra bytes.
http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0337e/BABBCJII.html
> Doing real unwinding is also far more accurate than frame pointer based
> unwinding (the latter doesn't handle leaf functions correctly, entry/exit in
> non-leaf functions and shrinkwrapped functions - and this breaks callgraph
> profiling).
This is true, but doing real unwinding is prohibitively expensive in an
embedded systems context, in which one has only hundreds of KiB of code storage
and RAM.
Richard Earnshaw
<https://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg196444.html>:
> I object to another hack going in for another ill-specified frame
> pointer variant until such time as the ABI is updated to sort this out
> properly.
>
> So until the ABI sanctions a proper inter-function frame chain record,
> GCC will only support local use of the frame pointer and no chaining.
Since this is not defined by the ABI, the ABI is unlikely to specify it any
time soon. However, ARM seems to have blessed clang as the official ARM
compiler, so it's a defacto standard at this point.
Richard Earnshaw
<https://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg196488.html>:
> On entry to a function the code has to save the existing frame register.
> It doesn't know (can't trivially know) whether the caller is code
> compiled in Arm state or Thumb state. So how can it save the caller's
> frame register if they are not the same?
>
> Furthermore, the 'other' frame register (ie r7 in Arm state, r11 in
> Thumb) is available as a call-saved register, so can contain any random
> value. If you try to use that random value during a frame chain walk
> your program will most like take an access violation. It will certainly
> give you a garbage frame chain.
This is true - you cannot safely walk the stack frames if thumb and arm
functions are intermixed. However, for the situations in which this feature is
most useful this is not a problem. For deeply embedded codebases, the entire
codebase is compiled with a single compiler and instruction set. Most
microcontrollers use a Cortex-M instruction set, which doesn't even implement
ARM instructions, so by definition they will not be present!
Someone wrote something like:
> The extra overhead of frame pointers will remove the benefit of thumb instructions -
> why not just use ARM instructions?
As noted above, there exist many MCUs for which ARM mode is not implemented.
I have two applications motivating me to wanting this fixed. I'm working on
safety-critical firmware running on small microcontrollers.
1) In case of a crash, it would be extremely helpful to be able to have the
embedded firmware relay back a simple stack trace. Integrating libunwind and
including the unwind tables in our firmware is too heavyweight. We know the
boundaries of the stack, so it's easy to validate address when traversing
frames. If the stack trace sometimes ends early due to issues such as ARM/Thumb
interworking, we don't mind - it's much better than no trace at all.
2) It would be really helpful to have random sampling profiling, by capturing
stack traces from a randomly triggered timer interrupt handler. Full profiling
would add excessive overhead.
I'm totally willing to take a slight performance hit to get the two features
above. Judging from stackoverflow questions and such, there are others who
would like predictable frame pointers:
https://stackoverflow.com/questions/19643047/arm-call-stack-generation-with-no-frame-pointer
http://cplusadd.blogspot.com/2008/11/frame-pointers-and-function-call.html
https://gcc-help.gcc.gnu.narkive.com/D8BDrQzp/stack-backtrace-for-arm-thumb
https://github.com/google/sanitizers/issues/640
>From gcc-bugs-return-657066-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 00:22:24 2019
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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/92128] fold more non-constant strlen relational expressions
Date: Tue, 22 Oct 2019 00:22:00 -0000
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--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Yes. I constrained strlenopt-80.c to only a subset of the targets where the
optimization has been implemented but forgot to do the same for strlenopt-81.c.
I'm traveling this week but I'll try to remember to adjust the text after I
get back.
>From gcc-bugs-return-657067-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 00:47:18 2019
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From: "wilco at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/92172] ARM Thumb2 frame pointers inconsistent with clang
Date: Tue, 22 Oct 2019 00:47:00 -0000
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Wilco <wilco at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |wilco at gcc dot gnu.org
--- Comment #1 from Wilco <wilco at gcc dot gnu.org> ---
Firstly it's important to be clear this is about adding support for a frame
chain for unwinding.
A frame pointer is something different since it is used for addressing local
variables. Historically Arm compilers only supported a frame pointer, not a
frame chain for unwinding. So different Arm backends use different frame
pointer registers and there is no defined layout since it is not designed for
unwinding.
Why does this matter? Well as your examples show, if you want to emit a frame
chain using standard push/pop, it typically ends up pointing to the top of the
frame. That is the worst possible position for a frame pointer on Thumb - while
Arm supports negative immediate offsets up to 4KB, Thumb-1 doesn't support
negative offsets at all, and Thumb-2 supports offsets up to -255 but only with
32-bit instructions. So the result of conflating the frame chain and frame
pointer implies a terrible codesize hit for Thumb.
There is also an issue with using r7 as the frame chain in that you're now
reserving a precious low register callee-save and just use it once in a typical
function. So using r7 is a very bad idea for Thumb.
Your examples suggest LLVM suffers from both of these issues, and IIRC it still
uses r11 on Arm but r7 on Thumb. That is way too inefficient/incorrect to
consider a defacto standard.
>From gcc-bugs-return-657068-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 01:01:06 2019
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From: "kargl at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/87711] ICE in gfc_trans_transfer, at fortran/trans-io.c:2676
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |kargl at gcc dot gnu.org
--- Comment #2 from kargl at gcc dot gnu.org ---
corallary:
program p
character(3) :: c(2) = ['abc', 'xyz']
integer n(2)
n = len_trim(c,4)
print *, n
end
% gfcx -o z a.f90
a.f90:4:0:
4 | n = len_trim(c,4)
|
internal compiler error: in gfc_trans_assignment_1, at
fortran/trans-expr.c:11065
0x5c80b6 gfc_trans_assignment_1
../../gccx/gcc/fortran/trans-expr.c:11065
0x83b122 trans_code
../../gccx/gcc/fortran/trans.c:1852
0x86a8d9 gfc_generate_function_code(gfc_namespace*)
../../gccx/gcc/fortran/trans-decl.c:6798
0x7e53e6 translate_all_program_units
../../gccx/gcc/fortran/parse.c:6276
0x7e53e6 gfc_parse_file()
../../gccx/gcc/fortran/parse.c:6515
0x838008 gfc_be_parse_file
../../gccx/gcc/fortran/f95-lang.c:208
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.
Without kind type parameter
program p
character(3) :: c(2) = ['abc', 'xyz']
integer n(2)
n = len_trim(c)
print *, n
end
% gfcx -o z a.f90 && ./z
3 3
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From: "asolokha at gmx dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/92173] New: [10 Regression] ICE in optab_for_tree_code, at optabs-tree.c:81
Date: Tue, 22 Oct 2019 02:23:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92173
Bug ID: 92173
Summary: [10 Regression] ICE in optab_for_tree_code, at
optabs-tree.c:81
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Keywords: ice-on-invalid-code
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
Target: x86_64-pc-linux-gnu
gcc-10.0.0-alpha20191020 snapshot (r277217) ICEs when compiling the following
testcase w/ -O1 -ftree-loop-vectorize:
unsigned int
yo (unsigned int o0, signed char s1)
{
for (s1 = 0; s1 < 1; s1 -= 2)
o0 += o0;
return o0 + s1;
}
% x86_64-pc-linux-gnu-gcc-10.0.0-alpha20191020 -O1 -ftree-loop-vectorize -c
bcnm9vyh.c
during GIMPLE pass: vect
bcnm9vyh.c: In function 'yo':
bcnm9vyh.c:2:1: internal compiler error: in optab_for_tree_code, at
optabs-tree.c:81
2 | yo (unsigned int o0, signed char s1)
| ^~
0x653a1a optab_for_tree_code(tree_code, tree_node const*, optab_subtype)
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191020/work/gcc-10-20191020/gcc/optabs-tree.c:81
0xe8b9ba vectorizable_reduction(_stmt_vec_info*, _slp_tree*, _slp_instance*,
vec<stmt_info_for_cost, va_heap, vl_ptr>*)
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191020/work/gcc-10-20191020/gcc/tree-vect-loop.c:6247
0xe91fc1 vect_analyze_loop_operations
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191020/work/gcc-10-20191020/gcc/tree-vect-loop.c:1560
0xe91fc1 vect_analyze_loop_2
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191020/work/gcc-10-20191020/gcc/tree-vect-loop.c:2079
0xe91fc1 vect_analyze_loop(loop*, _loop_vec_info*, vec_info_shared*)
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191020/work/gcc-10-20191020/gcc/tree-vect-loop.c:2356
0xeaaa04 try_vectorize_loop_1
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191020/work/gcc-10-20191020/gcc/tree-vectorizer.c:886
0xeab82d vectorize_loops()
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191020/work/gcc-10-20191020/gcc/tree-vectorizer.c:1114
>From gcc-bugs-return-657070-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 04:01:22 2019
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Subject: [Bug c++/83534] C++17: typeinfo for noexcept function lacks noexcept information
Date: Tue, 22 Oct 2019 04:01:00 -0000
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--- Comment #5 from Kamlesh Kumar <kamleshbhalui at gmail dot com> ---
Fixed on trunk
>From gcc-bugs-return-657071-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 05:30:43 2019
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Subject: [Bug ipa/92074] [10 regression] 26% performance regression on Spec2017 548.exchange2_r
Date: Tue, 22 Oct 2019 05:30:00 -0000
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--- Comment #4 from Hongtao.liu <crazylht at gmail dot com> ---
Same regression on skylake.
>From gcc-bugs-return-657072-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 05:57:52 2019
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From: "linkw at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/92132] new test case gcc.dg/vect/vect-cond-reduc-4.c fails with its introduction in r277067
Date: Tue, 22 Oct 2019 05:57:00 -0000
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--- Comment #3 from Kewen Lin <linkw at gcc dot gnu.org> ---
Powerpc already support vcond<A><B> where A and B are in the same mode or the
same size mode. As Richard pointed out, this case requires some packs, it
requires powerpc supports vec_cmpv2dfv2di and vcond_mask_v4siv4si, the
comparison generates the mask then convert to V4SI to use in condition
selection.
>From gcc-bugs-return-657073-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 06:35:53 2019
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Subject: [Bug c++/91979] Incorrect mangling for non-template-argument nullptr expression
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Kamlesh Kumar <kamleshbhalui at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |kamleshbhalui at gmail dot com
--- Comment #2 from Kamlesh Kumar <kamleshbhalui at gmail dot com> ---
This fixes it.
diff --git a/gcc/cp/mangle.c b/gcc/cp/mangle.c
index a9333b8..780da9f 100644
--- a/gcc/cp/mangle.c
+++ b/gcc/cp/mangle.c
@@ -3400,7 +3400,8 @@ write_template_arg_literal (const tree value)
case INTEGER_CST:
gcc_assert (!same_type_p (TREE_TYPE (value), boolean_type_node)
|| integer_zerop (value) || integer_onep (value));
- write_integer_cst (value);
+ if (TREE_CODE(TREE_TYPE(value)) != NULLPTR_TYPE)
+ write_integer_cst (value);
break;
case REAL_CST:
diff --git a/libiberty/cp-demangle.c b/libiberty/cp-demangle.c
index aa78c86..199be43 100644
--- a/libiberty/cp-demangle.c
+++ b/libiberty/cp-demangle.c
@@ -861,7 +861,7 @@ CP_STATIC_IF_GLIBCPP_V3
int
cplus_demangle_fill_name (struct demangle_component *p, const char *s, int
len)
{
- if (p == NULL || s == NULL || len <= 0)
+ if (p == NULL || s == NULL || len < 0)
return 0;
p->d_printing = 0;
p->type = DEMANGLE_COMPONENT_NAME;
>From gcc-bugs-return-657074-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 06:44:24 2019
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Subject: [Bug driver/47785] GCC with -flto does not pass -Wa options to the assembler
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kugan at gcc dot gnu.org changed:
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CC| |kugan at gcc dot gnu.org
--- Comment #14 from kugan at gcc dot gnu.org ---
A patch for this is posted at
https://gcc.gnu.org/ml/gcc-patches/2019-10/msg01471.html
>From gcc-bugs-return-657075-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 06:52:46 2019
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Subject: [Bug tree-optimization/92173] [10 Regression] ICE in optab_for_tree_code, at optabs-tree.c:81
Date: Tue, 22 Oct 2019 06:52:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2019-10-22
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-657076-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 06:53:59 2019
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Subject: [Bug c/92172] ARM Thumb2 frame pointers inconsistent with clang
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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Keywords| |ABI
Target| |arm
Severity|normal |enhancement
>From gcc-bugs-return-657077-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 06:56:59 2019
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Subject: [Bug c/92167] Poor source location choice for diagnostic in macro expansion
Date: Tue, 22 Oct 2019 06:56:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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>From gcc-bugs-return-657078-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 06:57:14 2019
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Subject: [Bug tree-optimization/92166] [10 regression] ICE compiling gcc.dg/vshift-5.c starting with r277241
Date: Tue, 22 Oct 2019 06:57:00 -0000
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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 #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mine.
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Subject: [Bug testsuite/92165] [10 regression] g++.dg/cpp2a/nodiscard-once.C fails starting with r277205
Date: Tue, 22 Oct 2019 06:57:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed btw.
>From gcc-bugs-return-657079-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 06:57:41 2019
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Subject: [Bug testsuite/92165] [10 regression] g++.dg/cpp2a/nodiscard-once.C fails starting with r277205
Date: Tue, 22 Oct 2019 06:57:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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>From gcc-bugs-return-657081-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 07:04:06 2019
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Subject: [Bug middle-end/92170] Incorrect function names output when using -fstack-usage on C++
Date: Tue, 22 Oct 2019 07:04:00 -0000
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
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--- Comment #4 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> This appears to be caused by code in output_stack_usage in toplev.c
> searching for "." in the function name and only outputting after that point.
> It is unclear to me what the intent was originally, but it dates back to the
> original stack usage support commit (990495a75cd7).
It's intended to keep only the unqualified name, in particular for Ada.
> I achieved the expected output shown above by applying the below patch to
> disable the checks:
OK, but this workaround is not acceptable of course.
>From gcc-bugs-return-657082-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 07:46:42 2019
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Subject: [Bug c++/90947] [9 Regression] Simple lookup table of array of strings is miscompiled
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Dimitar Yordanov <dimitar.yordanov at sap dot com> changed:
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CC| |dimitar.yordanov at sap dot com
--- Comment #12 from Dimitar Yordanov <dimitar.yordanov at sap dot com> ---
Hi,
after the fix we hit a regression with:
$ cat > main.cpp << EOF
#include <atomic>
static std::atomic<int> a[1] { {1} };
int main(void)
{
if (!a[0].load())
__builtin_abort ();
return 0;
}
EOF
$ g++ main.cpp && ./a.out
Best wishes
Dimitar
>From gcc-bugs-return-657083-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 08:04:20 2019
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Subject: [Bug c++/83534] C++17: typeinfo for noexcept function lacks noexcept information
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Fixed in r277270, thanks!
(Please include bug numbers in the changelog entry, see the changelog files for
examples of the preferred form.)
>From gcc-bugs-return-657084-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 08:06:47 2019
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Subject: [Bug c++/91979] Incorrect mangling for non-template-argument nullptr expression
Date: Tue, 22 Oct 2019 08:06:00 -0000
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Thanks, once you have a copyright assignment on file please post to the
gcc-patches list with a testcase.
This might need a new -fabi-version to preserve the old mangling for
compatibility, but I'll let Jason determine that.
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Subject: [Bug c/91915] New warning for duplicate if condition in if-elseif-elseif chain
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--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
Great, thank you Marek!
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Subject: [Bug c/91915] New warning for duplicate if condition in if-elseif-elseif chain
Date: Tue, 22 Oct 2019 08:08:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91915
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
Implemented.
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Subject: [Bug c++/87403] [Meta-bug] Issues that suggest a new warning
Date: Tue, 22 Oct 2019 08:08:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87403
Bug 87403 depends on bug 91915, which changed state.
Bug 91915 Summary: New warning for duplicate if condition in if-elseif-elseif chain
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91915
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
>From gcc-bugs-return-657088-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 08:10:01 2019
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Subject: [Bug middle-end/81669] trunk/gcc/fibonacci_heap.h:58: possible missing initialisation ?
Date: Tue, 22 Oct 2019 08:10:00 -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 #4 from Martin Liška <marxin at gcc dot gnu.org> ---
Then let me fix it.
>From gcc-bugs-return-657089-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 08:23:57 2019
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Subject: [Bug ipa/91956] [10 Regression] ICE: verify_cgraph_node failed (error: comdat-local function called by __ct .isra outside its comdat) since r275982
Date: Tue, 22 Oct 2019 08:23:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91956
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2019-10-22
Known to work| |9.2.0
Assignee|unassigned at gcc dot gnu.org |jamborm at gcc dot gnu.org
Summary|[10 Regression] ICE: |[10 Regression] ICE:
|verify_cgraph_node failed |verify_cgraph_node failed
|(error: comdat-local |(error: comdat-local
|function called by __ct |function called by __ct
|.isra outside its comdat) |.isra outside its comdat)
| |since r275982
Ever confirmed|0 |1
Known to fail| |10.0
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Martin, you will need probably to do something similar to what IPA ICF does:
https://github.com/gcc-mirror/gcc/blob/master/gcc/ipa-icf.c#L1060
in order to prevent the verifier error.
Can you please take a look?
>From gcc-bugs-return-657090-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 08:26:19 2019
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Subject: [Bug fortran/92174] New: runtime error: index 15 out of bounds for type 'gfc_expr *[15]
Date: Tue, 22 Oct 2019 08:26:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92174
Bug ID: 92174
Summary: runtime error: index 15 out of bounds for type
'gfc_expr *[15]
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
Blocks: 63426
Target Milestone: ---
Happens with UBSAN build in:
$ ./xgcc -B. /home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/pr91802.f90
-fcoarray=single
../../gcc/fortran/array.c:867:36: runtime error: index 15 out of bounds for
type 'gfc_expr *[15]'
#0 0x8b40d6 in gfc_set_array_spec(gfc_symbol*, gfc_array_spec*, locus*)
../../gcc/fortran/array.c:867
#1 0x953b29 in attr_decl1 ../../gcc/fortran/decl.c:8521
#2 0x95406c in attr_decl ../../gcc/fortran/decl.c:8582
#3 0x9549f2 in gfc_match_codimension() ../../gcc/fortran/decl.c:8855
#4 0xaf2ff4 in match_word ../../gcc/fortran/parse.c:65
#5 0xaf4825 in decode_statement ../../gcc/fortran/parse.c:464
#6 0xafaa00 in next_free ../../gcc/fortran/parse.c:1272
#7 0xafb459 in next_statement ../../gcc/fortran/parse.c:1504
#8 0xb03ad7 in parse_spec ../../gcc/fortran/parse.c:3902
#9 0xb0d9d4 in parse_module ../../gcc/fortran/parse.c:6085
#10 0xb0f9f4 in gfc_parse_file() ../../gcc/fortran/parse.c:6390
#11 0xc7db45 in gfc_be_parse_file ../../gcc/fortran/f95-lang.c:208
#12 0x23dbbc5 in compile_file ../../gcc/toplev.c:456
#13 0x23e39ec in do_compile ../../gcc/toplev.c:2167
#14 0x23e401b in toplev::main(int, char**) ../../gcc/toplev.c:2302
#15 0x491ff6a in main ../../gcc/main.c:39
#16 0x7fd8f53b3e0a in __libc_start_main ../csu/libc-start.c:308
#17 0x89d1e9 in _start
(/home/marxin/Programming/gcc2/objdir/gcc/f951+0x89d1e9)
../../gcc/fortran/array.c:868:36: runtime error: index 15 out of bounds for
type 'gfc_expr *[15]'
#0 0x8b42cf in gfc_set_array_spec(gfc_symbol*, gfc_array_spec*, locus*)
../../gcc/fortran/array.c:868
#1 0x953b29 in attr_decl1 ../../gcc/fortran/decl.c:8521
#2 0x95406c in attr_decl ../../gcc/fortran/decl.c:8582
#3 0x9549f2 in gfc_match_codimension() ../../gcc/fortran/decl.c:8855
#4 0xaf2ff4 in match_word ../../gcc/fortran/parse.c:65
#5 0xaf4825 in decode_statement ../../gcc/fortran/parse.c:464
#6 0xafaa00 in next_free ../../gcc/fortran/parse.c:1272
#7 0xafb459 in next_statement ../../gcc/fortran/parse.c:1504
#8 0xb03ad7 in parse_spec ../../gcc/fortran/parse.c:3902
#9 0xb0d9d4 in parse_module ../../gcc/fortran/parse.c:6085
#10 0xb0f9f4 in gfc_parse_file() ../../gcc/fortran/parse.c:6390
#11 0xc7db45 in gfc_be_parse_file ../../gcc/fortran/f95-lang.c:208
#12 0x23dbbc5 in compile_file ../../gcc/toplev.c:456
#13 0x23e39ec in do_compile ../../gcc/toplev.c:2167
#14 0x23e401b in toplev::main(int, char**) ../../gcc/toplev.c:2302
#15 0x491ff6a in main ../../gcc/main.c:39
#16 0x7fd8f53b3e0a in __libc_start_main ../csu/libc-start.c:308
#17 0x89d1e9 in _start
(/home/marxin/Programming/gcc2/objdir/gcc/f951+0x89d1e9)
...
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63426
[Bug 63426] [meta-bug] Issues found with -fsanitize=undefined
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Subject: [Bug other/63426] [meta-bug] Issues found with -fsanitize=undefined
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>From gcc-bugs-return-657092-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 08:30:29 2019
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Subject: [Bug ipa/91969] Compiling testsuite/g++.dg/ipa/pr85421.C with -fdump-ipa-inline ICEs
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2019-10-22
Component|gcov-profile |ipa
Known to work| |9.2.0
Assignee|unassigned at gcc dot gnu.org |marxin at gcc dot gnu.org
Ever confirmed|0 |1
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Started with r273603. I can take a look.
>From gcc-bugs-return-657093-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 08:31:59 2019
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Subject: [Bug tree-optimization/92005] [10 Regression] switch code generation regression
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Martin Liška <marxin at gcc dot gnu.org> changed:
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--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #3)
> Switch conversion should probably run late (again?).
I can work on that.
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Subject: [Bug c++/90947] [9 Regression] Simple lookup table of array of strings is miscompiled
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--- Comment #13 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 47082
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47082&action=edit
gcc10-pr90947.patch
Here is an untested patch that fixes it for -std=c++17/-std=c++2a, though not
for C++11/14, next_initialized_field (TYPE_FIELDS (type)) for std::atomic<int>
is NULL in those cases, as that class contains no non-static data members
directly, just has __atomic_base as a base class. The initializer has init
list
type in both cases, dunno if we don't need to treat those specially or how else
to fix C++11/14.
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Martin Liška <marxin at gcc dot gnu.org> changed:
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed. Can you please send the patch to mailing list?
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Subject: [Bug lto/91576] [10 Regression] error: invalid conversion in gimple call since r272749
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--- Comment #8 from Martin Liška <marxin at gcc dot gnu.org> ---
Honza?
>From gcc-bugs-return-657097-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 08:44:54 2019
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Subject: [Bug target/92175] New: x86 backend claims V4SI multiplication support, preventing more optimal pattern
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Bug ID: 92175
Summary: x86 backend claims V4SI multiplication support,
preventing more optimal pattern
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Costing has
19010 /* Without sse4.1, we don't have PMULLD; it's emulated with 7
19011 insns, including two PMULUDQ. */
19012 else if (mode == V4SImode && !(TARGET_SSE4_1 || TARGET_AVX))
19013 return ix86_vec_cost (mode, cost->mulss * 2 + cost->sse_op *
5);
but for a testcase doing just x * 2 that is excessive. The vectorizer
would change that to x << 1 via vect_recog_mult_pattern (yeah, oddly
not to x + x ...).
This causes SSE vectorization to be disregarded easily, falling back to
MMX "emulation" mode which doesn't claim V4SImode multiplication support
producing essentially SSE code but with only half of the lanes doing useful
work.
I'm not sure if pattern recog should try costing here. Certainly the
vectorizer won't try the PMULUDQ variant if the backend would claim to
not support V4SImode mult.
Noticed for the testcase in PR92173.
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Subject: [Bug c++/90938] [9/10 Regression] Initializing array with {1} works, but not {0}
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Martin, any progress here?
>From gcc-bugs-return-657099-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 08:52:13 2019
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Subject: [Bug target/92175] x86 backend claims V4SI multiplication support, preventing more optimal pattern
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Jakub, you did the mult pattern recog - any opinions? (also why do I see
a << 1 instead of a + a?)
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Subject: [Bug fortran/90133] [7/8/9/10 Regression] Linker error from accessing event_type via use association outside associate/block scope
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Subject: [Bug middle-end/91021] [7/8 Regression] ICE in tm_memopt_compute_antic at gcc/trans-mem.c:3867
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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Subject: [Bug c++/90320] [7/8/9/10 Regression] Explicit constructor called implicitly
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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Subject: [Bug inline-asm/91111] [7/8 Regression] arm64 Linux kernel panics at boot due to unexpected register assignment in inline asm
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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Subject: [Bug c++/91891] [7 Regression] std::function with lambda default initializer in aggregate construction causes ICE
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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Subject: [Bug ipa/92109] [10 Regression] ICE in modify_call_stmt, at ipa-param-manipulation.c:1586
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Martin Liška <marxin at gcc dot gnu.org> changed:
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Keywords| |needs-reduction
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Last reconfirmed| |2019-10-22
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Let me work on test-case isolation.
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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Subject: [Bug target/91816] [7/8/9/10 Regression] Arm generates out of range conditional branches in Thumb2
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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>From gcc-bugs-return-657106-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 08:54:39 2019
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Subject: [Bug c++/89357] [7/8/9/10 regression][C++11] alignas for automatic variables with alignment greater than 16 fails
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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>From gcc-bugs-return-657109-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 08:57:18 2019
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Subject: [Bug middle-end/90354] [7 regression] Skip the not first insn when traversing the insn node
Date: Tue, 22 Oct 2019 08:57:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |rguenth at gcc dot gnu.org
Summary|[7.3 regression] Skip the |[7 regression] Skip the not
|not first insn when |first insn when traversing
|traversing the insn node |the insn node
Known to fail| |7.3.0
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #2)
> Which target? Which GCC version did work for you?
Which target are you working on? Since you mark this as regression what
version of GCC is working OK previous to GCC 7.3?
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Subject: [Bug target/90928] [9/10 Regression] [nvptx] internal compiler error: in instantiate_virtual_regs_in_insn, at function.c:1737
Date: Tue, 22 Oct 2019 08:57:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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>From gcc-bugs-return-657111-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 08:58:26 2019
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Subject: [Bug tree-optimization/91825] [10 regression] Bogus -Wmaybe-uninitialized with r275744 breaks bootstrap
Date: Tue, 22 Oct 2019 08:58:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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>From gcc-bugs-return-657113-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 08:59:36 2019
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Subject: [Bug tree-optimization/91885] [9 Regression] ICE when compiling SPEC 2017 blender benchmark with -O3 -fprofile-generate
Date: Tue, 22 Oct 2019 08:59:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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>From gcc-bugs-return-657112-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 08:59:03 2019
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Subject: [Bug rtl-optimization/91860] [10 Regression] ICE: in decompose, at rtl.h:2279 with -Og -fipa-cp -g --param=max-combine-insns=3
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #12 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-657114-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 09:00:39 2019
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Subject: [Bug c++/81866] [7/8 Regression] ICE with a default template parameter which is a template class nested in a template class
Date: Tue, 22 Oct 2019 09:00:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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>From gcc-bugs-return-657115-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 09:02:08 2019
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Subject: [Bug middle-end/82364] [7 Regression] Enormous memory usage when building for 32bit i386 with >= -O1
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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>From gcc-bugs-return-657116-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 09:03:40 2019
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Subject: [Bug sanitizer/83356] [7 Regression] excessive stack usage compiling with -O2 -fsanitize=bounds -fsanitize=object-size
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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>From gcc-bugs-return-657117-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 09:04:35 2019
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Subject: [Bug target/83712] [7 Regression] "Unable to find a register to spill" when compiling for thumb1
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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>From gcc-bugs-return-657118-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 09:04:59 2019
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Subject: [Bug rtl-optimization/83972] [7 Regression] ICE in code_motion_process_successors, at sel-sched.c:6398
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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>From gcc-bugs-return-657119-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 09:05:14 2019
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Subject: [Bug c++/84536] [7/8 Regression] ICE with non-type template parameter
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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>From gcc-bugs-return-657120-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 09:18:58 2019
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Subject: [Bug ipa/92133] Support multi versioning on self recursive function
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2019-10-22
Assignee|unassigned at gcc dot gnu.org |marxin at gcc dot gnu.org
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Let me take a look.
>From gcc-bugs-return-657121-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 09:26:49 2019
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Subject: [Bug target/92175] x86 backend claims V4SI multiplication support, preventing more optimal pattern
Date: Tue, 22 Oct 2019 09:26:00 -0000
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Something should compare the costs. Either vect_recog_mult_pattern should move
the mul_optab != unknown_optab etc. check after vect_synth_mult_by_constant,
compare the costs of the pattern recognized sequence vs. of the multiplication
and if vector multiplication is beneficial, undo whatever
vect_synth_mult_by_constant added.
Or the cost function for vector multiplication should special case
multiplication by constant and also expansion of vector multiplication should
do the same plus compare costs.
I bet the first option would be easier.
As for v << 1 vs. v + v, there is already synth_lshift_by_additions, so we
could force using it for LSHIFT_EXPR by 1 even for !synth_shift_p (would that
be unconditionally a win?).
OT, the indentation introduced in r238340 has quite a lot of issues, many
functions calls have misindented arguments.
>From gcc-bugs-return-657122-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 09:28:46 2019
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Subject: [Bug c++/83534] C++17: typeinfo for noexcept function lacks noexcept information
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Martin Liška <marxin at gcc dot gnu.org> changed:
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CC| |marxin at gcc dot gnu.org
--- Comment #7 from Martin Liška <marxin at gcc dot gnu.org> ---
There's a wrong a ChangeLog reference which belongs here:
Author: jason
Date: Mon Oct 21 20:19:28 2019
New Revision: 277270
URL: https://gcc.gnu.org/viewcvs?rev=277270&root=gcc&view=rev
Log:
PR c++/83434 - typeinfo for noexcept function lacks noexcept information
2019-10-21 Kamlesh Kumar <kamleshbhalui@gmail.com>
* rtti.c (get_tinfo_decl_dynamic): Do not call
TYPE_MAIN_VARIANT for function.
(get_typeid): Likewise.
* g++.dg/rtti/pr83534.C: New Test.
Reviewed-by: Jason Merrill <jason@redhat.com>
Added:
trunk/gcc/testsuite/g++.dg/rtti/pr83534.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/rtti.c
I'll update the ChangeLog file.
>From gcc-bugs-return-657123-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 09:33:08 2019
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Subject: [Bug ipa/92074] [10 regression] 26% performance regression on Spec2017 548.exchange2_r
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--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Hongtao.liu from comment #4)
> Same regression on skylake.
Confirmed and same happens for znver1:
https://lnt.opensuse.org/db_default/v4/SPEC/graph?plot.0=32.407.0
https://lnt.opensuse.org/db_default/v4/SPEC/graph?plot.0=33.407.0
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Subject: [Bug tree-optimization/85887] [7/8/9/10 Regression] Missing DW_TAG_lexical_block PC range
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Subject: [Bug tree-optimization/85887] [7/8/9/10 Regression] Missing DW_TAG_lexical_block PC range
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-10-22
Component|debug |tree-optimization
Known to work|8.1.1 |4.8.5
Summary|[7 Regression] Missing |[7/8/9/10 Regression]
|DW_TAG_lexical_block PC |Missing
|range |DW_TAG_lexical_block PC
| |range
Ever confirmed|0 |1
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
The difference in debug info between GCC 7 (failing) and GCC 8 (passing) is
that GCC 8 has the test UNSUPPORTED because:
pr55665.gdb:3: Error in sourced command file:^M
No symbol "p" in current context.^M
UNSUPPORTED: g++.dg/guality/pr55665.C -O2 line 23 p == 40
while with GCC 7 setting the break-point works. The above error happens
with trunk as well.
The lexical block range is present but what seems to be missing is
the fact that 'p' is not yet updated in memory at the point of the
breakpoint but the store was delayed and the updated value is only
available in a register.
Now - that's wrong-code since concurrent execution from a different thread
doesn't see the initialization then. The issue is that 'p' doesn't have
its address taken and thus we do not consider it aliased by the
__cxa_guard_acquire/__cxa_guard_release functions - which is correct - but
we rely on aliasing to implement storage barriers... :/
The fact that gdb looks at memory instead of a register is probably both
an artifact of
<3><de>: Abbrev Number: 11 (DW_TAG_variable)
<df> DW_AT_name : p
<e1> DW_AT_decl_file : 1
<e2> DW_AT_decl_line : 22
<e3> DW_AT_decl_column : 14
<e4> DW_AT_type : <0x68>
<e8> DW_AT_location : 9 byte block: 3 8 0 0 0 0 0 0 0 (DW_OP_addr: 8)
as well as us not tracking memory in var-tracking.
That it worked with GCC 4.8 is because didn't optimize this to
a register.
>From gcc-bugs-return-657128-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 09:46:52 2019
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Subject: [Bug libstdc++/88305] Implement P0019R8, C++20 std::atomic_ref
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This was added to trunk a while ago.
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Subject: [Bug libstdc++/88322] Implement C++20 library features.
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Bug 88322 depends on bug 88305, which changed state.
Bug 88305 Summary: Implement P0019R8, C++20 std::atomic_ref
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88305
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2019-10-22
Assignee|unassigned at gcc dot gnu.org |emsr at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
How much of this is left to do?
Are you waiting for me to review any patches?
I noticed we have this in the <version> header, but it's not defined by any
other headers:
#define __cpp_lib_constexpr 201711L
Should that also be defined in <bits/c++config.h>?
The current C++20 draft says it has value 201811L.
>From gcc-bugs-return-657129-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 09:47:52 2019
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--- Comment #41 from Jiu Fu Guo <guojiufu at gcc dot gnu.org> ---
for code:
subroutine foo (i, i1, block)
integer :: i, i1
integer :: block(9, 9, 9)
block(i:9,1,i1) = block(i:9,1,i1) - 10
end subroutine foo
"-funroll-loops --param max-unroll-times=2 --param max-unrolled-insns=20"
could help to improve some run time.(~10% on ppcle)
main:
do n = 0, N
do i = 1, 9
do j = 1, 9
call foo (i, j, block)
end do
end do
end do
>From gcc-bugs-return-657130-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 09:50:35 2019
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Subject: [Bug middle-end/92170] Incorrect function names output when using -fstack-usage on C++
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--- Comment #5 from Austin Morton <austinpmorton at gmail dot com> ---
Of course, I only provided it to show how I was generating the "expected"
results.
I wasn't sure what the purpose of splitting at "." was (in particular since I
think of GCC as a C/C++ compiler and the "." would not normally appear in
qualified names as a separator).
With the context that this is something specific for Ada, I think maybe the
correct thing to do would be to make this filtering a language hook that can be
customized to do the right thing for each language.
>From gcc-bugs-return-657131-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 10:01:58 2019
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Subject: [Bug ipa/92133] Support multi versioning on self recursive function
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--- Comment #2 from Feng Xue <fxue at os dot amperecomputing.com> ---
(In reply to Martin Liška from comment #1)
> Let me take a look.
I've created a patch
(https://gcc.gnu.org/ml/gcc-patches/2019-10/msg01260.html), could you take a
time to review it?
>From gcc-bugs-return-657132-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 10:12:40 2019
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Subject: [Bug middle-end/92170] Incorrect function names output when using -fstack-usage on C++
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--- Comment #6 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> I wasn't sure what the purpose of splitting at "." was (in particular since
> I think of GCC as a C/C++ compiler and the "." would not normally appear in
> qualified names as a separator).
Yet there is a comment just above the code.
> With the context that this is something specific for Ada, I think maybe the
> correct thing to do would be to make this filtering a language hook that can
> be customized to do the right thing for each language.
This sounds a bit overkill, we can probably print the fully qualified name.
>From gcc-bugs-return-657133-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 10:34:29 2019
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Subject: [Bug middle-end/92170] Incorrect function names output when using -fstack-usage on C++
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--- Comment #7 from Austin Morton <austinpmorton at gmail dot com> ---
As I said, the code made no sense to me in the context of C/C++ qualified names
- the comment didn't clarify that this bit of code was concerned with Ada
qualified names.
Printing the fully qualified name is exactly what my patch does (although
obviously it doesn't remove the disabled code).
For C/C++ this change would be non-breaking since in all cases the output was
either correct and fully qualified already, or just outright broken.
For Ada this would presumably be a breaking change? Hence why I suggested
making a language hook to specify the behavior per-language.
Maybe a breaking change here is not something you are concerned with, in which
case it would definitely be simpler to just unconditionally print the fully
qualified name.
>From gcc-bugs-return-657134-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 10:37:21 2019
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Subject: [Bug ipa/92133] Support multi versioning on self recursive function
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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CC| |hubicka at gcc dot gnu.org,
| |jamborm at gcc dot gnu.org
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--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Feng Xue from comment #2)
> (In reply to Martin Liška from comment #1)
> > Let me take a look.
>
> I've created a patch
> (https://gcc.gnu.org/ml/gcc-patches/2019-10/msg01260.html), could you take a
> time to review it?
It's domain of Martin Jambor and Honza.
They will provide a review, don't worry.
>From gcc-bugs-return-657135-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 10:46:48 2019
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Subject: [Bug rtl-optimization/92176] New: LRA problem with reloads for subreg operands
Date: Tue, 22 Oct 2019 10:46:00 -0000
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Bug ID: 92176
Summary: LRA problem with reloads for subreg operands
Product: gcc
Version: 10.0
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Created attachment 47083
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47083&action=edit
reduced testcase
The attached testcase core dumps when compiled with -O3 -march=z13 but executes
fine with -O3 -march=zEC12.
A QImode subreg on a pseudo gets assigned a floating point register and is
simplified to (reg:QI (...)). However, changing the mode of an FPR is
disallowed by the S/390 backend in s390_can_change_mode class. The problem
appears to be that simplify_operand_subreg in lra-constraints.c does not check
can_change_mode_class before assigning a register class. It always picks the
preferred register class for an expression as returned by the backend.
reload used to invoke can_change_mode_class when reloading a subreg - see
push_reload.
I tried to return just GENERAL_REGS in the preferred_reload_class whenever
being invoked with a subreg for which can_change_mode class would return false.
This helps in some cases. However, that function does not always get called
with the subreg expression, if there are other uses of that register not having
a subreg.
>From gcc-bugs-return-657136-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 10:48:40 2019
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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Subject: [Bug ipa/91969] Compiling testsuite/g++.dg/ipa/pr85421.C with -fdump-ipa-inline ICEs
Date: Tue, 22 Oct 2019 10:59:00 -0000
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
A reduced test-case:
$ cat ice.C
enum by {};
class A {
public:
class B {
public:
virtual void m_fn2(by) = 0;
};
virtual int m_fn1();
B *cf;
};
by a;
class C : A, A::B {
void m_fn2(by);
};
void C::m_fn2(by) { cf->m_fn2(a); }
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Subject: [Bug tree-optimization/92131] [8/9/10 Regression] incorrect assumption that (ao >= 0) is always false
Date: Tue, 22 Oct 2019 11:10:00 -0000
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--- Comment #19 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Created attachment 47084
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47084&action=edit
Tentative fix
>From gcc-bugs-return-657138-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 11:10:40 2019
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug lto/91393] [10 Regression] lto1: internal compiler error: decompressed stream: Destination buffer is too small
Date: Tue, 22 Oct 2019 11:10:00 -0000
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--- Comment #11 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to David Binderman from comment #10)
> (In reply to Martin Liška from comment #9)
> > I've got a patch candidate for it.
>
> Ping Martin. Anything happened with that patch ?
There's a discussion going on:
https://gcc.gnu.org/ml/gcc-patches/2019-10/msg01559.html
>From gcc-bugs-return-657141-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 11:52:30 2019
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Subject: [Bug tree-optimization/89280] [7/8 Regression] ICE: Segmentation fault (in is_gimple_reg_type)
Date: Tue, 22 Oct 2019 11:52:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
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Subject: [Bug tree-optimization/92173] [10 Regression] ICE in optab_for_tree_code, at optabs-tree.c:81
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-657140-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 11:52:28 2019
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Subject: [Bug tree-optimization/92173] [10 Regression] ICE in optab_for_tree_code, at optabs-tree.c:81
Date: Tue, 22 Oct 2019 11:52:00 -0000
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Oct 22 11:51:52 2019
New Revision: 277286
URL: https://gcc.gnu.org/viewcvs?rev=277286&root=gcc&view=rev
Log:
2019-10-22 Richard Biener <rguenther@suse.de>
PR tree-optimization/92173
* tree-vect-loop.c (vectorizable_reduction): If
vect_transform_reduction cannot handle code-generation try without
the single-def-use-cycle optimization. Pass optab_vector to
optab_for_tree_code to get vector shifts as that's what we'd
generate.
* gcc.dg/torture/pr92173.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr92173.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-vect-loop.c
>From gcc-bugs-return-657143-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 12:08:01 2019
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Subject: [Bug middle-end/90354] [7 regression] Skip the not first insn when traversing the insn node
Date: Tue, 22 Oct 2019 12:08:00 -0000
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--- Comment #6 from vfdff <zhongyunde at huawei dot com> ---
(In reply to Richard Biener from comment #5)
> (In reply to Richard Biener from comment #2)
> > Which target? Which GCC version did work for you?
>
> Which target are you working on? Since you mark this as regression what
> version of GCC is working OK previous to GCC 7.3?
1ã€I test the case passed on gcc 4.7, and later I take a look at the dump, find
the JUMP insn is issued alone, i.e. it doesn't appear such bug.
2ã€I work on self-develop DSP chip, and it can issue 8 insns at most in one
time.
>From gcc-bugs-return-657144-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 12:15:54 2019
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Subject: [Bug middle-end/90354] Skip the not first insn when traversing the insn node
Date: Tue, 22 Oct 2019 12:15:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |out of tree port
Status|WAITING |UNCONFIRMED
Summary|[7 regression] Skip the not |Skip the not first insn
|first insn when traversing |when traversing the insn
|the insn node |node
Ever confirmed|1 |0
--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
I see. Thanks for the extra info.
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Subject: [Bug c++/89357] [7/8/9/10 regression][C++11] alignas for automatic variables with alignment greater than 16 fails
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Subject: [Bug c/89410] [7/8 Regression] ICE in calculate_line_spans, at diagnostic-show-locus.c:1237 after #line
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Subject: [Bug target/89434] [7/8 Regression] wrong code with -Og and __builtin_mul_overflow()
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Subject: [Bug c++/90320] [7/8/9/10 Regression] Explicit constructor called implicitly
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Subject: [Bug tree-optimization/90758] [7 Regression] spurious -Warray-bounds with -O3
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Subject: [Bug middle-end/90663] [7/8/9 Regression] strcmp (&a[i], a + i) not folded for arrays and constant index
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Subject: [Bug middle-end/91021] [7/8 Regression] ICE in tm_memopt_compute_antic at gcc/trans-mem.c:3867
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Subject: [Bug middle-end/90794] [7/8/9/10 Regression] -O3 with "VLA type" in C++ leads to an ICE
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Subject: [Bug c++/91133] [7/8/9/10 Regression] Wrong "partial specialization is not more specialized than" error
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Subject: [Bug middle-end/90796] [8/9/10 Regression] GCC: O2 vs O3 output differs on simple test
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--- Comment #12 from Michael Matz <matz at gcc dot gnu.org> ---
Author: matz
Date: Tue Oct 22 12:25:03 2019
New Revision: 277287
URL: https://gcc.gnu.org/viewcvs?rev=277287&root=gcc&view=rev
Log:
Fix PR middle-end/90796
PR middle-end/90796
* gimple-loop-jam.c (any_access_function_variant_p): New function.
(adjust_unroll_factor): Use it to constrain safety, new parameter.
(tree_loop_unroll_and_jam): Adjust call and profitable unroll factor.
testsuite/
* gcc.dg/unroll-and-jam.c: Add three invalid and one valid case.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gimple-loop-jam.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/unroll-and-jam.c
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Subject: [Bug middle-end/90796] [8/9 Regression] GCC: O2 vs O3 output differs on simple test
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Michael Matz <matz at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[8/9/10 Regression] GCC: O2 |[8/9 Regression] GCC: O2 vs
|vs O3 output differs on |O3 output differs on simple
|simple test |test
Known to fail|10.0 |
--- Comment #13 from Michael Matz <matz at gcc dot gnu.org> ---
Fixed in trunk so far. Will be backporting in a few days.
>From gcc-bugs-return-657156-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 12:29:11 2019
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Subject: [Bug tree-optimization/91201] [7/8/9/10 Regression] SIMD not generated for horizontal sum of bytes in array
Date: Tue, 22 Oct 2019 12:29:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #25 from Richard Biener <rguenth at gcc dot gnu.org> ---
We unroll the loop completely but our basic-block vectorization capabilities do
not include reductions. We see the following there:
<bb 2> [local count: 357878154]:
temp_33 = bytes[0];
_34 = temp_33 >> 32;
temp_35 = temp_33 + _34;
_36 = temp_35 >> 16;
temp_37 = temp_35 + _36;
_38 = temp_37 >> 8;
temp_44 = bytes[1];
_45 = temp_44 >> 32;
temp_46 = temp_44 + _45;
_47 = temp_46 >> 16;
temp_48 = temp_46 + _47;
_40 = temp_37 + temp_48;
_49 = temp_48 >> 8;
_51 = _38 + _40;
result_29 = _49 + _51;
_20 = (unsigned char) result_29;
b ={v} {CLOBBER};
return _20;
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Subject: [Bug c++/91241] [7/8/9/10 Regression] internal compiler error: symtab_node::verify failed
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Keywords| |ice-checking
Priority|P3 |P2
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Honza?
>From gcc-bugs-return-657158-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 12:32:30 2019
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Subject: [Bug lto/91273] [7/8/9/10 Regression] ICE in warn_types_mismatch at ipa-devirt.c:995
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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>From gcc-bugs-return-657159-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 12:32:51 2019
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Subject: [Bug tree-optimization/91384] [7/8/9/10 Regression] Compare with negation is not eliminated
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Priority|P3 |P2
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-10-22
Ever confirmed|0 |1
>From gcc-bugs-return-657160-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 12:34:05 2019
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Subject: [Bug preprocessor/90476] prepossessor should error if #line 0
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--- Comment #7 from Jonny Grant <jg at jguk dot org> ---
Could someone confirm this please.
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Subject: [Bug target/91816] [7/8/9/10 Regression] Arm generates out of range conditional branches in Thumb2
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Priority|P3 |P2
>From gcc-bugs-return-657162-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 12:35:14 2019
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Subject: [Bug tree-optimization/91812] [7/8 Regression] GCC ignores volatile modifier
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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Subject: [Bug middle-end/91623] [7/8 Regression] -msse4.1 -O3 segfault in /usr/lib/gcc/x86_64-pc-linux-gnu/8.3.0/include/smmintrin.h:270:10
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What |Removed |Added
----------------------------------------------------------------------------
Target| |x86_64-*-*, i?86-*-*
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Subject: [Bug tree-optimization/92177] New: [10 regression] gcc.dg/vect/bb-slp-22.c FAILs
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92177
Bug ID: 92177
Summary: [10 regression] gcc.dg/vect/bb-slp-22.c FAILs
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: ro at gcc dot gnu.org
Target Milestone: ---
Target: sparc-sun-solaris2.11
Created attachment 47085
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47085&action=edit
32-bit sparc-sun-solaris2.11 bb-slp-22.c.168t.slp2
Between 20191016 (r277071) and 20191021 (r277261), gcc.dg/vect/bb-slp-22.c
began
to FAIL on 32 and 64-bit SPARC:
+FAIL: gcc.dg/vect/bb-slp-22.c -flto -ffat-lto-objects scan-tree-dump-times
slp2 "basic block vectorized" 1
+FAIL: gcc.dg/vect/bb-slp-22.c scan-tree-dump-times slp2 "basic block
vectorized" 1
The message now appears twice, so this is clearly progress, but the guards need
to be adapted.
Dump attached.
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Subject: [Bug c++/91891] [7 Regression] std::function with lambda default initializer in aggregate construction causes ICE
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Subject: [Bug tree-optimization/92177] [10 regression] gcc.dg/vect/bb-slp-22.c FAILs
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Subject: [Bug debug/91887] [7/8/9 Regression] -fdebug-types-section ICE building chromium
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Subject: [Bug c++/92105] [7/8/9/10 Regression] decltype(decltype(decltype)) prints exponential number of repeated errors
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Subject: [Bug rtl-optimization/90706] [9 Regression] Useless code generated for stack / register operations on AVR
Date: Tue, 22 Oct 2019 12:46:00 -0000
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Subject: [Bug ada/91100] [9,10 Regression] FAIL: gnat.dg/socket1.adb execution test
Date: Tue, 22 Oct 2019 12:46:00 -0000
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Subject: [Bug lto/89075] [9/10 Regression] error: type variant has different TREE_TYPE
Date: Tue, 22 Oct 2019 12:46:00 -0000
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/87833] [9/10 Regression] -fPIC isn't used to create offload shared library
Date: Tue, 22 Oct 2019 12:46:00 -0000
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Subject: [Bug tree-optimization/90264] [9/10 Regression] -Wnull-dereference QoI issue
Date: Tue, 22 Oct 2019 12:46:00 -0000
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Subject: [Bug c++/90291] [8/9/10 Regression] Inline namespace erroneously extends another namespace
Date: Tue, 22 Oct 2019 12:46:00 -0000
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/90415] [9/10 Regression] std::is_copy_constructible<std::tuple<std::any>> is incomplete
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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>From gcc-bugs-return-657181-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 12:48:48 2019
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug ipa/91969] Compiling testsuite/g++.dg/ipa/pr85421.C with -fdump-ipa-inline ICEs
Date: Tue, 22 Oct 2019 12:48:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
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--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Patch candidate:
https://gcc.gnu.org/ml/gcc-patches/2019-10/msg01563.html
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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/92173] [10 Regression] ICE in optab_for_tree_code, at optabs-tree.c:81
Date: Tue, 22 Oct 2019 13:09:00 -0000
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Oct 22 13:08:53 2019
New Revision: 277288
URL: https://gcc.gnu.org/viewcvs?rev=277288&root=gcc&view=rev
Log:
2019-10-22 Richard Biener <rguenther@suse.de>
PR tree-optimization/92173
* tree-vect-loop.c (vectorizable_reduction): If
vect_transform_reduction cannot handle code-generation try without
the single-def-use-cycle optimization. Pass optab_vector to
optab_for_tree_code to get vector shifts as that's what we'd
generate.
* gcc.dg/torture/pr92173.c: New testcase.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/vshift-5.c
trunk/gcc/tree-vect-slp.c
trunk/gcc/tree-vect-stmts.c
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Subject: [Bug tree-optimization/92166] [10 regression] ICE compiling gcc.dg/vshift-5.c starting with r277241
Date: Tue, 22 Oct 2019 13:12:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92166
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug ipa/92109] [10 Regression] ICE in modify_call_stmt, at ipa-param-manipulation.c:1586
Date: Tue, 22 Oct 2019 13:26:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jamborm at gcc dot gnu.org
Known to work| |9.2.0
Known to fail| |10.0
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Ok, now I have just isolated 4 pre-processed source files and I'm reducing
these ..
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Subject: [Bug tree-optimization/92177] [10 regression] gcc.dg/vect/bb-slp-22.c FAILs
Date: Tue, 22 Oct 2019 13:27:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2019-10-22
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Ah, thanks - that might be an undesided side-effect of r277241
We now vectorize
out[0] = a0 * x;
out[1] = a1 * y;
out[2] = a2 * x;
out[3] = a3 * y;
as
_5 = a0_40 * x_44(D);
_6 = a1_41 * y_45(D);
_7 = a2_42 * x_44(D);
_8 = a3_43 * y_45(D);
_66 = {_7, _8};
vect_cst__67 = _66;
_68 = {_5, _6};
vect_cst__69 = _68;
MEM <vector(2) unsigned int> [(unsigned int *)&out] = vect_cst__69;
_71 = &out[0] + 8;
MEM <vector(2) unsigned int> [(unsigned int *)_71] = vect_cst__67;
since we're no longer fencing the build-from-scalar code via
&& !SLP_TREE_CHILDREN (child).is_empty () (previously we had no
SLP children nodes for the SLP node representing the multiplication).
So the test is no longer testing vectorization of multiplications.
It also shows that BB vectorizing this function at strict basic-block
boundaries is suboptimal.
I'll see what to best do here, clearly a sort-term fix would be to
change the code to make vectorization of the multiplication more
obviously profitable.
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Subject: [Bug fortran/92174] runtime error: index 15 out of bounds for type 'gfc_expr *[15]
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kargl at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
CC| |kargl at gcc dot gnu.org
--- Comment #1 from kargl at gcc dot gnu.org ---
(In reply to Martin Liška from comment #0)
> Happens with UBSAN build in:
>
> $ ./xgcc -B.
> /home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/pr91802.f90
> -fcoarray=single
> ../../gcc/fortran/array.c:867:36: runtime error: index 15 out of bounds for
> type 'gfc_expr *[15]'
What are you doing? pr91802.f90 is a compile time test.
It cannot generate a runtime error.
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Subject: [Bug fortran/92174] runtime error: index 15 out of bounds for type 'gfc_expr *[15]
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to kargl from comment #1)
> (In reply to Martin Liška from comment #0)
> > Happens with UBSAN build in:
> >
> > $ ./xgcc -B.
> > /home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/pr91802.f90
> > -fcoarray=single
> > ../../gcc/fortran/array.c:867:36: runtime error: index 15 out of bounds for
> > type 'gfc_expr *[15]'
>
>
> What are you doing? pr91802.f90 is a compile time test.
> It cannot generate a runtime error.
It's a runtime error of the GCC compiler that compiles the test-case ;)
The error message is a bit misleading.
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Subject: [Bug fortran/92174] runtime error: index 15 out of bounds for type 'gfc_expr *[15]
Date: Tue, 22 Oct 2019 14:22:00 -0000
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--- Comment #3 from Steve Kargl <sgk at troutmask dot apl.washington.edu> ---
On Tue, Oct 22, 2019 at 02:14:55PM +0000, marxin at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92174
>
> --- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
> (In reply to kargl from comment #1)
> > (In reply to Martin Liška from comment #0)
> > > Happens with UBSAN build in:
> > >
> > > $ ./xgcc -B.
> > > /home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/pr91802.f90
> > > -fcoarray=single
> > > ../../gcc/fortran/array.c:867:36: runtime error: index 15 out of bounds for
> > > type 'gfc_expr *[15]'
> >
> >
> > What are you doing? pr91802.f90 is a compile time test.
> > It cannot generate a runtime error.
>
> It's a runtime error of the GCC compiler that compiles the test-case ;)
> The error message is a bit misleading.
>
So, what does your tool do? gfortran correctly diagnosis
that rank+corank > 15, issues an error, and exits. What is
the problem?
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Subject: [Bug c++/90938] [9/10 Regression] Initializing array with {1} works, but not {0}
Date: Tue, 22 Oct 2019 14:22:00 -0000
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--- Comment #9 from Martin Sebor <msebor at gcc dot gnu.org> ---
I plan to submit a patch for GCC 10 and (hopefully) also GCC 9.x. What's the
cutoff for 9?
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Subject: [Bug sanitizer/92154] new glibc breaks arm bootstrap due to libsanitizer
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--- Comment #2 from Tamar Christina <tnfchris at gcc dot gnu.org> ---
Author: tnfchris
Date: Tue Oct 22 14:25:38 2019
New Revision: 277291
URL: https://gcc.gnu.org/viewcvs?rev=277291&root=gcc&view=rev
Log:
Arm: Fix arm libsanitizer bootstrap failure
Glibc has recently introduced changed to the mode field in ipc_perm
in commit 2f959dfe849e0646e27403f2e4091536496ac0f0. For Arm this
means that the mode field no longer has the same size.
This causes an assert failure against libsanitizer's internal copy
of ipc_perm. Since this change can't be easily detected I am adding
arm to the list of targets that are excluded from this check. libsanitizer
doesn't use this field (and others, it in fact uses only 1 field) so this check
can be ignored.
Padding bits were used by glibc when the field was changed so sizeof and
offsets
of the remaining fields should be the same.
libsanitizer/ChangeLog:
PR sanitizer/92154
* sanitizer_common/sanitizer_platform_limits_posix.cpp (defined):
Cherry-pick compiler-rt revision r375220.
Modified:
trunk/libsanitizer/ChangeLog
trunk/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.cpp
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90476
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |msebor at gcc dot gnu.org
Resolution|--- |WORKSFORME
--- Comment #8 from Martin Sebor <msebor at gcc dot gnu.org> ---
C makes it a constraint that in the #line directive:
The digit sequence shall not specify zero, nor a number greater than
2147483647.
Both GCC and G++ issue a pedantic warning for the directive so I think they
both do the right thing and already implement the requested behavior. There
could be a warning option to control this warning separately from others but
that seems like a separate issue that applies to a number of other warnings as
well.
gcc -O2 -S -Wall -Wextra -Wpedantic -xc++ /build/tmp/a.c
pr90476.c:1:7: warning: line number out of range
1 | #line 0
| ^
pr90476.c: error: ‘mytypo’ does not name a type
With that I think this can be resolved.
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Subject: [Bug c++/85746] Premature evaluation of __builtin_constant_p?
Date: Tue, 22 Oct 2019 14:43:00 -0000
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--- Comment #9 from Marc Glisse <glisse at gcc dot gnu.org> ---
Author: glisse
Date: Tue Oct 22 14:42:38 2019
New Revision: 277292
URL: https://gcc.gnu.org/viewcvs?rev=277292&root=gcc&view=rev
Log:
PR c++/85746: Don't fold __builtin_constant_p prematurely
2019-10-22 Marc Glisse <marc.glisse@inria.fr>
gcc/cp/
* constexpr.c (cxx_eval_builtin_function_call): Only set
force_folding_builtin_constant_p if manifestly_const_eval.
gcc/testsuite/
* g++.dg/pr85746.C: New file.
Added:
trunk/gcc/testsuite/g++.dg/pr85746.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/constexpr.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug preprocessor/90476] prepossessor should error if #line 0
Date: Tue, 22 Oct 2019 14:44:00 -0000
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--- Comment #9 from Jonny Grant <jg at jguk dot org> ---
Maybe it could say
warning: line number out of range 1 - 2147483647
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Subject: [Bug c++/85746] Premature evaluation of __builtin_constant_p?
Date: Tue, 22 Oct 2019 14:46:00 -0000
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Marc Glisse <glisse at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #10 from Marc Glisse <glisse at gcc dot gnu.org> ---
Fixed in gcc-10.
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Subject: [Bug c++/90938] [9/10 Regression] Initializing array with {1} works, but not {0}
Date: Tue, 22 Oct 2019 14:50:00 -0000
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--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
There is no cutoff for 9.x (well, in about 2 years from now the branch will be
closed), but the branch is used by people in the wild, so especially for
regressions from recent releases the sooner it is fixed the better. Of course
assuming the fix is safe.
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Subject: [Bug tree-optimization/85887] [7/8/9/10 Regression] Missing DW_TAG_lexical_block PC range
Date: Tue, 22 Oct 2019 14:53:00 -0000
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Oct 22 14:52:52 2019
New Revision: 277293
URL: https://gcc.gnu.org/viewcvs?rev=277293&root=gcc&view=rev
Log:
PR tree-optimization/85887
* decl.c (expand_static_init): Drop ECF_LEAF from __cxa_guard_acquire
and __cxa_guard_release.
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/decl.c
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Subject: [Bug c++/91363] Implement P0960R3: Parenthesized initialization of aggregates
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |patch
--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
https://gcc.gnu.org/ml/gcc-patches/2019-10/msg01578.html
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/92174] runtime error: index 15 out of bounds for type 'gfc_expr *[15]
Date: Tue, 22 Oct 2019 14:55:00 -0000
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--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Steve Kargl from comment #3)
> On Tue, Oct 22, 2019 at 02:14:55PM +0000, marxin at gcc dot gnu.org wrote:
> > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92174
> >
> > --- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
> > (In reply to kargl from comment #1)
> > > (In reply to Martin Liška from comment #0)
> > > > Happens with UBSAN build in:
> > > >
> > > > $ ./xgcc -B.
> > > > /home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/pr91802.f90
> > > > -fcoarray=single
> > > > ../../gcc/fortran/array.c:867:36: runtime error: index 15 out of bounds for
> > > > type 'gfc_expr *[15]'
> > >
> > >
> > > What are you doing? pr91802.f90 is a compile time test.
> > > It cannot generate a runtime error.
> >
> > It's a runtime error of the GCC compiler that compiles the test-case ;)
> > The error message is a bit misleading.
> >
>
> So, what does your tool do? gfortran correctly diagnosis
> that rank+corank > 15, issues an error, and exits. What is
> the problem?
Problem is that the compiler invokes an undefined behaviour for the source
file.
You can see the same with the following patch:
diff --git a/gcc/fortran/array.c b/gcc/fortran/array.c
index 427110bee74..166caca8347 100644
--- a/gcc/fortran/array.c
+++ b/gcc/fortran/array.c
@@ -864,6 +864,7 @@ gfc_set_array_spec (gfc_symbol *sym, gfc_array_spec *as,
locus *error_loc)
sym->as->corank = as->corank;
for (i = 0; i < as->corank; i++)
{
+ gcc_assert (sym->as->rank + i < GFC_MAX_DIMENSIONS);
sym->as->lower[sym->as->rank + i] = as->lower[i];
sym->as->upper[sym->as->rank + i] = as->upper[i];
}
$ ./xgcc -B. /home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/pr91802.f90
-fcoarray=single
f951: internal compiler error: in gfc_set_array_spec, at fortran/array.c:867
0x880e62 gfc_set_array_spec(gfc_symbol*, gfc_array_spec*, locus*)
/home/marxin/Programming/gcc/gcc/fortran/array.c:867
0x8b3f6d attr_decl1
/home/marxin/Programming/gcc/gcc/fortran/decl.c:8521
0x8b4114 attr_decl
/home/marxin/Programming/gcc/gcc/fortran/decl.c:8582
0x8b46f0 gfc_match_codimension()
/home/marxin/Programming/gcc/gcc/fortran/decl.c:8855
0x93dd54 match_word
/home/marxin/Programming/gcc/gcc/fortran/parse.c:65
0x93efcb decode_statement
/home/marxin/Programming/gcc/gcc/fortran/parse.c:464
0x944185 next_free
/home/marxin/Programming/gcc/gcc/fortran/parse.c:1272
0x944727 next_statement
/home/marxin/Programming/gcc/gcc/fortran/parse.c:1504
0x947bf0 parse_spec
/home/marxin/Programming/gcc/gcc/fortran/parse.c:3902
0x94b747 parse_module
/home/marxin/Programming/gcc/gcc/fortran/parse.c:6085
0x94c15b gfc_parse_file()
/home/marxin/Programming/gcc/gcc/fortran/parse.c:6390
0x9ad167 gfc_be_parse_file
/home/marxin/Programming/gcc/gcc/fortran/f95-lang.c:208
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.
Note that sym->as->lower is defined as:
struct gfc_expr *lower[GFC_MAX_DIMENSIONS], *upper[GFC_MAX_DIMENSIONS];
Hope it's clear now? Thanks.
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Subject: [Bug fortran/92174] runtime error: index 15 out of bounds for type 'gfc_expr *[15]
Date: Tue, 22 Oct 2019 14:56:00 -0000
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--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
> Problem is that the compiler invokes an undefined behaviour for the source
file.
More precisely, it's an out of bounds array access.
>From gcc-bugs-return-657200-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 14:59:00 2019
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Subject: [Bug gcov-profile/91971] Profile directory concatenated with object file path
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--- Comment #3 from qinzhao at gcc dot gnu.org ---
(In reply to Martin Liška from comment #2)
> Confirmed. Can you please send the patch to mailing list?
I have sent the patch to gcc-patches several weeks ago, and pinged twice
already:
https://gcc.gnu.org/ml/gcc-patches//2019-10/msg01506.html
are you the reviewer for this?
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Subject: [Bug gcov-profile/91971] Profile directory concatenated with object file path
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--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to qinzhao from comment #3)
> (In reply to Martin Liška from comment #2)
> > Confirmed. Can you please send the patch to mailing list?
>
> I have sent the patch to gcc-patches several weeks ago, and pinged twice
> already:
>
> https://gcc.gnu.org/ml/gcc-patches//2019-10/msg01506.html
Good, I'll make a review tomorrow. For the next time, please add me to CC of
the email.
>
> are you the reviewer for this?
I am, I was on vacation for almost 4 weeks, so that's why you haven't received
a patch review ;)
>From gcc-bugs-return-657203-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 15:04:40 2019
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Subject: [Bug fortran/92178] New: Segmentation fault after passing allocatable array as intent(out) and its element as value into the same subroutine
Date: Tue, 22 Oct 2019 15:04:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92178
Bug ID: 92178
Summary: Segmentation fault after passing allocatable array as
intent(out) and its element as value into the same
subroutine
Product: gcc
Version: 9.2.1
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This code crashes at the allocated() call with GCC 7,8,9. I am not completely
sure all aliasing rules, but I think it should be fine.
implicit none
integer, allocatable :: a(:)
allocate(a, source=[1])
call assign(a, (a(1)))
print *, allocated(a)
contains
subroutine assign(a, b)
integer, allocatable, intent(out) :: a(:)
integer, value :: b
end subroutine
end program
based on
https://stackoverflow.com/questions/58504284/assignment-of-allocatable-array-with-itself-values/58506248#58506248
> gfortran -fsanitize=address -g -fbacktrace assign.f90
> ./a.out
ASAN:DEADLYSIGNAL
=================================================================
==19756==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000000 (pc
0x000000401354 bp 0x7ffd1a55b460 sp 0x7ffd1a55b0e0 T0)
==19756==The signal is caused by a READ memory access.
==19756==Hint: address points to the zero page.
#0 0x401353 in MAIN__ /home/lada/f/testy/stackoverflow/assign.f90:9
#1 0x401631 in main /home/lada/f/testy/stackoverflow/assign.f90:9
#2 0x7fb2b52cef89 in __libc_start_main (/lib64/libc.so.6+0x20f89)
#3 0x400c89 in _start (/home/lada/f/testy/stackoverflow/a.out+0x400c89)
AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV /home/lada/f/testy/stackoverflow/assign.f90:9
in MAIN__
==19756==ABORTING
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Subject: [Bug c++/91930] [10 Regression] internal compiler error: in lazily_declare_fn, at cp/method.c:2423 with -fconcepts
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Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug fortran/92178] Segmentation fault after passing allocatable array as intent(out) and its element as value into the same subroutine
Date: Tue, 22 Oct 2019 15:07:00 -0000
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--- Comment #1 from Vladimir Fuka <vladimir.fuka at gmail dot com> ---
It also crashes with passing just a(1) instead of (a(1)) and when removing the
value attribute.
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Subject: [Bug c++/92106] [8/9 Regression] ICE with structured bindings and -Wreturn-local-addr
Date: Tue, 22 Oct 2019 15:22:00 -0000
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--- Comment #8 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Tue Oct 22 15:21:34 2019
New Revision: 277294
URL: https://gcc.gnu.org/viewcvs?rev=277294&root=gcc&view=rev
Log:
PR c++/92106 - ICE with structured bindings and -Wreturn-local-addr.
* typeck.c (maybe_warn_about_returning_address_of_local): Avoid
recursing on null initializer and return false instead.
Added:
branches/gcc-9-branch/gcc/testsuite/g++.dg/cpp1z/decomp50.C
Modified:
branches/gcc-9-branch/gcc/cp/ChangeLog
branches/gcc-9-branch/gcc/cp/typeck.c
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Subject: [Bug tree-optimization/92179] New: [10 regression] r277288 causes ICEs compiling several test cases
Date: Tue, 22 Oct 2019 15:25:00 -0000
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Bug ID: 92179
Summary: [10 regression] r277288 causes ICEs compiling several
test cases
Product: gcc
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> FAIL: gcc.dg/vect/pr33953.c (internal compiler error)
> FAIL: gcc.dg/vect/pr33953.c (test for excess errors)
> FAIL: gcc.dg/vect/pr33953.c -flto -ffat-lto-objects scan-tree-dump-times vect "vectorized 1 loops" 1
> FAIL: gcc.dg/vect/pr33953.c -flto -ffat-lto-objects scan-tree-dump-times vect "vectorizing stmts using SLP" 1
> FAIL: gcc.dg/vect/pr33953.c -flto -ffat-lto-objects (internal compiler error)
> FAIL: gcc.dg/vect/pr33953.c -flto -ffat-lto-objects (test for excess errors)
> FAIL: gcc.dg/vect/pr33953.c scan-tree-dump-times vect "vectorized 1 loops" 1
> FAIL: gcc.dg/vect/pr33953.c scan-tree-dump-times vect "vectorizing stmts using SLP" 1
> FAIL: gcc.dg/vect/slp-36.c (internal compiler error)
> FAIL: gcc.dg/vect/slp-36.c (test for excess errors)
> FAIL: gcc.dg/vect/slp-36.c -flto -ffat-lto-objects (internal compiler error)
> FAIL: gcc.dg/vect/slp-36.c -flto -ffat-lto-objects (test for excess errors)
> FAIL: gcc.target/powerpc/sse2-psrlq-2.c (internal compiler error)
> FAIL: gcc.target/powerpc/sse2-psrlq-2.c (test for excess errors)
They are all in this same spot:
Executing on host: /home/seurer/gcc/build/gcc-test2/gcc/xgcc
-B/home/seurer/gcc/build/gcc-test2/gcc/
/home/seurer/gcc/gcc-test2/gcc/testsuite/gcc.target/powerpc/sse2-psrlq-2.c
-fno-diagnostics-show-caret -fno-diagnostics-show-line-numbers
-fdiagnostics-color=never -fdiagnostics-urls=never -O3 -mpower8-vector
-Wno-psabi -lm -o ./sse2-psrlq-2.exe (timeout = 300)
spawn -ignore SIGHUP /home/seurer/gcc/build/gcc-test2/gcc/xgcc
-B/home/seurer/gcc/build/gcc-test2/gcc/
/home/seurer/gcc/gcc-test2/gcc/testsuite/gcc.target/powerpc/sse2-psrlq-2.c
-fno-diagnostics-show-caret -fno-diagnostics-show-line-numbers
-fdiagnostics-color=never -fdiagnostics-urls=never -O3 -mpower8-vector
-Wno-psabi -lm -o ./sse2-psrlq-2.exe
during GIMPLE pass: slp
In file included from
/home/seurer/gcc/gcc-test2/gcc/testsuite/gcc.target/powerpc/sse2-psrlq-2.c:9:
/home/seurer/gcc/gcc-test2/gcc/testsuite/gcc.target/powerpc/sse2-check.h: In
function 'do_test':
/home/seurer/gcc/gcc-test2/gcc/testsuite/gcc.target/powerpc/sse2-check.h:18:1:
internal compiler error: in vectorizable_shift, at tree-vect-stmts.c:5836
0x10df15a3 vectorizable_shift
/home/seurer/gcc/gcc-test2/gcc/tree-vect-stmts.c:5836
0x10e0aceb vect_transform_stmt(_stmt_vec_info*, gimple_stmt_iterator*,
_slp_tree*, _slp_instance*)
/home/seurer/gcc/gcc-test2/gcc/tree-vect-stmts.c:10835
0x10e3ba0f vect_schedule_slp_instance
/home/seurer/gcc/gcc-test2/gcc/tree-vect-slp.c:3966
0x10e3b71b vect_schedule_slp_instance
/home/seurer/gcc/gcc-test2/gcc/tree-vect-slp.c:3860
0x10e3b71b vect_schedule_slp_instance
/home/seurer/gcc/gcc-test2/gcc/tree-vect-slp.c:3860
0x10e3e08b vect_schedule_slp(vec_info*)
/home/seurer/gcc/gcc-test2/gcc/tree-vect-slp.c:4040
0x10e42607 vect_slp_bb_region
/home/seurer/gcc/gcc-test2/gcc/tree-vect-slp.c:3092
0x10e42607 vect_slp_bb(basic_block_def*)
/home/seurer/gcc/gcc-test2/gcc/tree-vect-slp.c:3186
0x10e45d7b execute
/home/seurer/gcc/gcc-test2/gcc/tree-vectorizer.c:1309
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Subject: [Bug c++/91891] [7 Regression] std::function with lambda default initializer in aggregate construction causes ICE
Date: Tue, 22 Oct 2019 15:39:00 -0000
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--- Comment #4 from Peter Bindels <dascandy at gmail dot com> ---
For posterity,
#include <string>
#include <map>
#include <functional>
#include <utility>
#include <future>
template <typename T>
std::future<T> make_ready_future(T t);
struct y
{
int v;
std::function<void()> v2 = [this]() { v; };
};
template <typename... Ts>
auto xx(Ts... ts)
{
return make_ready_future(y{ ts... });
}
int main() {
auto f = xx();
}
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Subject: [Bug c++/92158] Enum warning when -1 enum converted to unsigned int or int
Date: Tue, 22 Oct 2019 15:40:00 -0000
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--- Comment #4 from Jonny Grant <jg at jguk dot org> ---
Hello
Implicit conversion can introduce bugs. I would like to detect implicit enum
conversions to other types in C and C++. How about just adding the C++ warnings
first to match clang in example below?
The following example does produce warnings in C++ with Clang trunk, but not C.
Likewise with MSVC, C++ warning, but no C warning.
G++ only warns on line (19), clang has the additional line (15) and line (17)
warnings.
Could G++ also add the additions warnings?
-O2 -Wall -Wextra -Wconversion -Werror
#include <stdio.h>
typedef enum
{
a = -1
} a_t;
a_t f()
{
return a;
}
int main()
{
unsigned int b = f();
a_t test = b;
printf("%u %u", test, b);
return b;
}
#1 with x86-64 clang (trunk)
<source>:15:22: error: implicit conversion changes signedness: 'a_t' to
'unsigned int' [-Werror,-Wsign-conversion]
unsigned int b = f();
~ ^~~
<source>:17:9: error: cannot initialize a variable of type 'a_t' with an lvalue
of type 'unsigned int'
a_t test = b;
^ ~
<source>:19:12: error: implicit conversion changes signedness: 'unsigned int'
to 'int' [-Werror,-Wsign-conversion]
return b;
~~~~~~ ^
3 errors generated.
Compiler returned: 1
#1 with x64 msvc v19.22
example.cpp
<source>(18): error C2440: 'initializing': cannot convert from 'unsigned int'
to 'a_t'
<source>(18): note: Conversion to enumeration type requires an explicit cast
(static_cast, C-style cast or function-style cast)
Compiler returned: 2
x86-64 gcc (trunk) - 484ms
#1 with x86-64 gcc (trunk)
<source>: In function 'int main()':
<source>:17:16: error: invalid conversion from 'unsigned int' to 'a_t'
[-fpermissive]
17 | a_t test = b;
| ^
| |
| unsigned int
Compiler returned: 1
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Subject: [Bug c++/92062] [9 Regression] ODR-use by static_assert ignored for static member of class template
Date: Tue, 22 Oct 2019 15:47:00 -0000
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--- Comment #7 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Tue Oct 22 15:46:47 2019
New Revision: 277295
URL: https://gcc.gnu.org/viewcvs?rev=277295&root=gcc&view=rev
Log:
PR c++/92062 - ODR-use ignored for static member of class template.
* pt.c (has_value_dependent_address): Strip location wrappers.
* g++.dg/cpp0x/constexpr-odr1.C: New test.
* g++.dg/cpp0x/constexpr-odr2.C: New test.
Added:
branches/gcc-9-branch/gcc/testsuite/g++.dg/cpp0x/constexpr-odr1.C
branches/gcc-9-branch/gcc/testsuite/g++.dg/cpp0x/constexpr-odr2.C
Modified:
branches/gcc-9-branch/gcc/cp/ChangeLog
branches/gcc-9-branch/gcc/cp/pt.c
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Subject: [Bug c++/92062] [9 Regression] ODR-use by static_assert ignored for static member of class template
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #8 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-657211-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 15:53:31 2019
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Subject: [Bug c++/92159] -Wenum-conversion for C++
Date: Tue, 22 Oct 2019 15:53:00 -0000
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--- Comment #4 from Jonny Grant <jg at jguk dot org> ---
My apologies, I tested with the correct test case and it already does not
compile in C++ as desired, so no -Wenum-conversion required.
#include <stdio.h>
typedef enum {brandon, jon, mitch} name_t;
typedef enum {fred, dog, cat} name2_t;
name2_t name = brandon;
name_t hik = 3;
int hal_entry(void)
{
if (hik < name)
return(0);
return 1;
}
int main ()
{
printf ("%d\n", hal_entry());
return 0;
}
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Subject: [Bug tree-optimization/92180] New: Missed optimization on casting __builtin_ia32_rdtsc result to int32
Date: Tue, 22 Oct 2019 15:55:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92180
Bug ID: 92180
Summary: Missed optimization on casting __builtin_ia32_rdtsc
result to int32
Product: gcc
Version: 9.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: mserdarsanli at gmail dot com
Target Milestone: ---
Link: https://godbolt.org/z/wcIN0a
#include <stdint.h>
uint32_t foo1() {
return __builtin_ia32_rdtsc();
}
uint64_t foo2() {
return __builtin_ia32_rdtsc();
}
Generates assembly:
foo1():
rdtsc
sal rdx, 32
or rax, rdx
ret
foo2():
rdtsc
sal rdx, 32
or rax, rdx
ret
While clang generates better code for foo1
foo1(): # @foo1()
rdtsc
ret
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Subject: [Bug fortran/92174] runtime error: index 15 out of bounds for type 'gfc_expr *[15]
Date: Tue, 22 Oct 2019 16:11:00 -0000
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--- Comment #6 from Steve Kargl <sgk at troutmask dot apl.washington.edu> ---
On Tue, Oct 22, 2019 at 02:56:01PM +0000, marxin at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92174
>
> --- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
> > Problem is that the compiler invokes an undefined behaviour for the source
> file.
>
> More precisely, it's an out of bounds array access.
>
Which is irrelevant as the gfortran diagnosis the
issue, issues an error meesage, and exits.
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Subject: [Bug c++/92181] New: initializer_list & string_view result in "modification of '<temporary>' is not a constant expression
Date: Tue, 22 Oct 2019 16:14:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92181
Bug ID: 92181
Summary: initializer_list & string_view result in "modification
of '<temporary>' is not a constant expression
Product: gcc
Version: 9.0
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>From gcc-bugs-return-657215-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 16:23:18 2019
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Subject: [Bug c++/92159] -Wenum-conversion for C++
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |WORKSFORME
--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Thanks, let's close this then.
>From gcc-bugs-return-657216-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 16:27:57 2019
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From: "robrecht.dewaele at pegus dot digital" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/92181] initializer_list & string_view result in "modification of '<temporary>' is not a constant expression
Date: Tue, 22 Oct 2019 16:27:00 -0000
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Robrecht Dewaele <robrecht.dewaele at pegus dot digital> changed:
What |Removed |Added
----------------------------------------------------------------------------
URL| |https://godbolt.org/z/baRg-
| |1
--- Comment #1 from Robrecht Dewaele <robrecht.dewaele at pegus dot digital> ---
The following code was tested on most clang and GCC compilers available on
Godbolt, and my local machine running Arch Linux, gcc (GCC) 9.2.0.
Starting from GCC version 9, the following code results in a compile-time
error:
"modification of '<temporary>' is not a constant expression"
on the line with the closing brace of the initializer_list initialization.
Code on Godbolt (has some extras compared to the minimal version below):
https://godbolt.org/z/baRg-1
// start of source code
#include <string_view>
#include <initializer_list>
struct S { const int i; };
constexpr std::initializer_list<S> foo{
{ []() { return std::string_view("").compare(""); }() }
};
// end of source code
Another version I tested with used a constexpr function rather than a lambda,
with the same failing result.
I have also tried replacing the lambda body with a simple "return true;" which
fixes the error.
>From gcc-bugs-return-657218-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 16:41:56 2019
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Subject: [Bug c++/92181] initializer_list & string_view result in "modification of '<temporary>' is not a constant expression
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Changed in r261086.
>From gcc-bugs-return-657217-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 16:41:14 2019
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Subject: [Bug c++/91979] Incorrect mangling for non-template-argument nullptr expression
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--- Comment #4 from Kamlesh Kumar <kamleshbhalui at gmail dot com> ---
patch posted at https://gcc.gnu.org/ml/gcc-patches/2019-10/msg01585.html
>From gcc-bugs-return-657219-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 16:48:44 2019
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/92180] Missed optimization on casting __builtin_ia32_rdtsc result to int32
Date: Tue, 22 Oct 2019 16:48:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org,
| |segher at gcc dot gnu.org,
| |uros at gcc dot gnu.org
Component|tree-optimization |rtl-optimization
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I think that is because the combiner doesn't even try to combine into
instruction setting a hard register.
Consider:
unsigned int
foo (void)
{
return __builtin_ia32_rdtsc ();
}
void
bar (unsigned int *p)
{
*p = __builtin_ia32_rdtsc ();
}
Both have pretty much the same code before the combine, except
(insn 14 7 15 2 (set (reg/i:SI 0 ax)
(subreg:SI (reg:DI 84) 0)) "pr92180.c":5:1 67 {*movsi_internal}
(expr_list:REG_DEAD (reg:DI 84)
(nil)))
(insn 15 14 0 2 (use (reg/i:SI 0 ax)) "pr92180.c":5:1 -1
(nil))
in foo and
(insn 10 8 0 2 (set (mem:SI (reg/v/f:DI 84 [ p ]) [1 *p_5(D)+0 S4 A32])
(subreg:SI (reg:DI 85) 0)) "pr92180.c":10:6 67 {*movsi_internal}
(expr_list:REG_DEAD (reg:DI 85)
(expr_list:REG_DEAD (reg/v/f:DI 84 [ p ])
(nil))))
in bar.
For bar, combine uses the nonzero_bits to optimize the (unsigned int) ((x <<
32) | y) into (unsigned int) y, but in foo, probably because of the hard
register in there, it doesn't try anything. Of course propagating anything
into an insn setting a hard register is risky, but in this case we'd just
replace one pseudo in the SUBREG_REG of the SET_SRC with another one.
GIMPLE optimizations can't do anything here, because the (x << 32) | y isn't
exposed there, we'd need a builtin with two return values for that kind of
thing.
>From gcc-bugs-return-657220-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 17:00:39 2019
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Subject: [Bug rtl-optimization/92180] Missed optimization on casting __builtin_ia32_rdtsc result to int32
Date: Tue, 22 Oct 2019 17:00:00 -0000
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--- Comment #2 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Combine *does* combine setters of hard registers.
nonzero_bits is not reliable, it depends on the order things are tried in.
>From gcc-bugs-return-657221-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 17:09:34 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/92180] Missed optimization on casting __builtin_ia32_rdtsc result to int32
Date: Tue, 22 Oct 2019 17:09:00 -0000
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
It is cant_combine_insn_p that returns true on insn 14
(insn 5 2 6 2 (parallel [
(set (reg:DI 84)
(unspec_volatile:DI [
(const_int 0 [0])
] UNSPECV_RDTSC))
(set (reg:DI 85)
(unspec_volatile:DI [
(const_int 0 [0])
] UNSPECV_RDTSC))
]) "pr92180.c":4:10 1049 {rdtsc_rex64}
(nil))
(insn 6 5 7 2 (parallel [
(set (reg:DI 85)
(ashift:DI (reg:DI 85)
(const_int 32 [0x20])))
(clobber (reg:CC 17 flags))
]) "pr92180.c":4:10 564 {*ashldi3_1}
(expr_list:REG_UNUSED (reg:CC 17 flags)
(nil)))
(insn 7 6 14 2 (parallel [
(set (reg:DI 84)
(ior:DI (reg:DI 84)
(reg:DI 85)))
(clobber (reg:CC 17 flags))
]) "pr92180.c":4:10 454 {*iordi_1}
(expr_list:REG_DEAD (reg:DI 85)
(expr_list:REG_UNUSED (reg:CC 17 flags)
(nil))))
(insn 14 7 15 2 (set (reg/i:SI 0 ax)
(subreg:SI (reg:DI 84) 0)) "pr92180.c":5:1 67 {*movsi_internal}
(expr_list:REG_DEAD (reg:DI 84)
(nil)))
because ax is targetm.class_likely_spilled_p.
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Subject: [Bug rtl-optimization/92180] Missed optimization on casting __builtin_ia32_rdtsc result to int32
Date: Tue, 22 Oct 2019 17:12:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92180
--- Comment #4 from Segher Boessenkool <segher at gcc dot gnu.org> ---
For x86 it may be because targetm.class_likely_spilled_p is true for ax, and
then indeed cant_combine_insn_p is true. See r53531, the mail thread for that
patch starts at https://gcc.gnu.org/ml/gcc-patches/2002-05/msg01216.html .
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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/91548] [10 Regression] Regression in constexpr evaluation of std::array
Date: Tue, 22 Oct 2019 17:30:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91548
--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
(In reply to Hannes Hauswedell from comment #2)
> Any news on this issue? We are using this pattern in some rather central
> files in our library and the bug literally breaks 90% of our unit tests so
> we can't keep track of other gcc10 issues or try the new concepts support...
>
> Thank you for your help!
BTW, is the library publicly accessible? If it is, I could try to compile it
when I have a fix for this to make sure it's resolved.
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Subject: [Bug c++/92106] [8 Regression] ICE with structured bindings and -Wreturn-local-addr
Date: Tue, 22 Oct 2019 17:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92106
--- Comment #9 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Tue Oct 22 17:46:12 2019
New Revision: 277296
URL: https://gcc.gnu.org/viewcvs?rev=277296&root=gcc&view=rev
Log:
PR c++/92106 - ICE with structured bindings and -Wreturn-local-addr.
* typeck.c (maybe_warn_about_returning_address_of_local): Avoid
recursing on null initializer and return false instead.
Added:
branches/gcc-8-branch/gcc/testsuite/g++.dg/cpp1z/decomp50.C
Modified:
branches/gcc-8-branch/gcc/cp/ChangeLog
branches/gcc-8-branch/gcc/cp/typeck.c
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Subject: [Bug c++/92106] [8 Regression] ICE with structured bindings and -Wreturn-local-addr
Date: Tue, 22 Oct 2019 17:47:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #10 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug fortran/86248] [7/8/9/10 Regression] LEN_TRIM in specification expression causes link failure
Date: Tue, 22 Oct 2019 17:50:00 -0000
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--- Comment #6 from paul.richard.thomas at gmail dot com <paul.richard.thomas at gmail dot com> ---
Hi Bill,
If you look at pr44265, I took over the patch from Ian Sandoe and
fixed one or two of the wrinkles associated with it. I do not seem to
have given it as much thought as I should. Had I done so, I would have
gone down the route suggested by Tobias Burnus and apparently used by
g95 and NAG, namely to mark the length of the return value as unknown
and initialize it on scope entry.
I don't have time tonight but I'll put it on my list of TODOs. It
looks like fairly low hanging fruit to me so I'll take a look see in
the next few days. Messing with name mangling cannot be the right way
to go that is for sure.
Thanks for prodding me
Paul
On Mon, 21 Oct 2019 at 19:39, longb at cray dot com
<gcc-bugzilla@gcc.gnu.org> wrote:
>
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86248
>
> --- Comment #5 from Bill Long <longb at cray dot com> ---
> Any progress on this?
>
> --
> You are receiving this mail because:
> You are on the CC list for the bug.
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Subject: [Bug c++/91548] [10 Regression] Regression in constexpr evaluation of std::array
Date: Tue, 22 Oct 2019 18:16:00 -0000
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--- Comment #5 from Hannes Hauswedell <h2+bugs at fsfe dot org> ---
(In reply to Marek Polacek from comment #4)
> (In reply to Hannes Hauswedell from comment #2)
> > Any news on this issue? We are using this pattern in some rather central
> > files in our library and the bug literally breaks 90% of our unit tests so
> > we can't keep track of other gcc10 issues or try the new concepts support...
> >
> > Thank you for your help!
>
> BTW, is the library publicly accessible? If it is, I could try to compile
> it when I have a fix for this to make sure it's resolved.
Sure, thanks for looking into this!
The library is available here:
https://github.com/seqan/seqan3/
Instructions for setting up unit tests are available here:
https://docs.seqan.de/seqan/3-master-user/setup_tests.html
The currently failing tests are visible here:
http://cdash.seqan.de/index.php?project=SeqAn3
Under "Nightly: unit", "FreeBSD unit Debug g++10 -std=c++2a"
Note that due to the recent arrival of C++20 concepts in gcc-trunk, other
things are currently broken with so you need to explicitly provide "-std=c++17
-fconcepts" (and not trust the auto detection of our cmake config).
Making e.g. "view_to_lower_test" should trigger the problem from this PR
(although I just saw that it also has a seemingly unrelated problem with not
finding std::span, just ignore that).
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Subject: [Bug fortran/92174] runtime error: index 15 out of bounds for type 'gfc_expr *[15]
Date: Tue, 22 Oct 2019 18:19:00 -0000
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--- Comment #7 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Tue Oct 22 18:18:59 2019
New Revision: 277297
URL: https://gcc.gnu.org/viewcvs?rev=277297&root=gcc&view=rev
Log:
2019-10-22 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/92174
* decl.c (attr_decl1): Move check for F2018:C822 from here ...
* array.c (gfc_set_array_spec): ... to here.
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/array.c
trunk/gcc/fortran/decl.c
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Subject: [Bug c++/91548] [10 Regression] Regression in constexpr evaluation of std::array
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--- Comment #6 from Hannes Hauswedell <h2+bugs at fsfe dot org> ---
To make the test only complain about the current issue, change line 20 in
include/seqan3/std/span to
```
#if 0
```
Regards,
Hannes
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Subject: [Bug fortran/92174] runtime error: index 15 out of bounds for type 'gfc_expr *[15]
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--- Comment #8 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Tue Oct 22 18:38:30 2019
New Revision: 277298
URL: https://gcc.gnu.org/viewcvs?rev=277298&root=gcc&view=rev
Log:
2019-10-22 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/92174
* decl.c (attr_decl1): Move check for F2018:C822 from here ...
* array.c (gfc_set_array_spec): ... to here.
Modified:
branches/gcc-9-branch/gcc/fortran/ChangeLog
branches/gcc-9-branch/gcc/fortran/array.c
branches/gcc-9-branch/gcc/fortran/decl.c
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Subject: [Bug other/63426] [meta-bug] Issues found with -fsanitize=undefined
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Bug 63426 depends on bug 92174, which changed state.
Bug 92174 Summary: runtime error: index 15 out of bounds for type 'gfc_expr *[15]
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92174
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
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Subject: [Bug fortran/92174] runtime error: index 15 out of bounds for type 'gfc_expr *[15]
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What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
Assignee|unassigned at gcc dot gnu.org |kargl at gcc dot gnu.org
Target Milestone|--- |9.3
--- Comment #9 from kargl at gcc dot gnu.org ---
fixed on 9-branch and trunk.
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Created attachment 47087
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47087&action=edit
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>From gcc-bugs-return-657235-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 19:30:48 2019
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Subject: [Bug c++/92182] New: No way to silence ''A::TKind' is too small to hold all values of 'enum Kind''
Date: Tue, 22 Oct 2019 19:30:00 -0000
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Bug ID: 92182
Summary: No way to silence ''A::TKind' is too small to hold all
values of 'enum Kind''
Product: gcc
Version: 9.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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Target Milestone: ---
enum Kind : unsigned {
Y = 0x0,
N = 0x1,
Z = 0x2,
};
struct A {
Kind TKind : 2;
};
gcc file.c
warning: 'A::TKind' is too small to hold all values of 'enum Kind'
This warning has no flag so we cannot use -Wno-XXX. Only option to silence this
warning is '-w'.
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Subject: [Bug fortran/92178] Segmentation fault after passing allocatable array as intent(out) and its element as value into the same subroutine
Date: Tue, 22 Oct 2019 19:33:00 -0000
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-10-22
CC| |kargl at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #2 from kargl at gcc dot gnu.org ---
Compiling the code with -fdump-tree-original and stripping out the unessential
intermediate code gives
assign (struct array01_integer(kind=4) & restrict a, integer(kind=4) b)
{
}
foo ()
{
if ((integer(kind=4)[0:] * restrict) a.data != 0B)
{
__builtin_free ((void *) a.data);
(integer(kind=4)[0:] * restrict) a.data = 0B;
}
assign (&a, (*(integer(kind=4)[0:] * restrict) a.data)[a.offset + 1]);
}
The effect of the intent(out) in assign is to deallocate the code on entry to
assign. This is done with the if-block. The side-effect of evaluating the
first dummy argument is that 'a' in the expression of the 2nd dummy argument is
undefined.
F2018 (well 18-007r1) page 308:
If a dummy argument has INTENT (OUT) or INTENT (INOUT), the actual
argument shall be definable. If a dummy argument has INTENT (OUT)
and its associated actual argument is allocated, the actual argument
is deallocated on procedure invocation (9.7.3.2).
then later
15.5.2.13 Restrictions on entities associated with dummy arguments
While an entity is associated with a dummy argument, the following
restrictions hold.
(1) Action that affects the allocation status of the entity or a
subobject thereof shall be taken through the dummy argument.
(2) If the allocation status of the entity or a subobject thereof
is affected through the dummy argument, then at any time during
the invocation and execution of the procedure, either before or
after the allocation or deallocation, it shall be referenced only
through the dummy argument.
It seems that code is non-conforming.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/92182] No way to silence ''A::TKind' is too small to hold all values of 'enum Kind''
Date: Tue, 22 Oct 2019 19:36:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2019-10-22
CC| |mpolacek at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |mpolacek at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Confirmed. I'll add something.
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Subject: [Bug c++/91826] [8/9/10 Regression] Unexpected behavior when class defined with namespace alias
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Nathan Sidwell <nathan at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |nathan at gcc dot gnu.org
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Subject: [Bug fortran/87851] [8/9/10 Regression] Wrong return type for len_trim
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CC| |anlauf at gcc dot gnu.org
--- Comment #8 from anlauf at gcc dot gnu.org ---
The following obvious patch seems to fix the issue and regtests cleanly
after adjustment of one testcase:
Index: gcc/fortran/iresolve.c
===================================================================
--- gcc/fortran/iresolve.c (Revision 277298)
+++ gcc/fortran/iresolve.c (Arbeitskopie)
@@ -1536,7 +1536,7 @@
if (kind)
f->ts.kind = mpz_get_si (kind->value.integer);
else
- f->ts.kind = gfc_default_integer_kind;
+ f->ts.kind = gfc_charlen_int_kind;
f->value.function.name = gfc_get_string ("__len_trim%d", string->ts.kind);
}
Index: gcc/testsuite/gfortran.dg/initialization_18.f90
===================================================================
--- gcc/testsuite/gfortran.dg/initialization_18.f90 (Revision 277298)
+++ gcc/testsuite/gfortran.dg/initialization_18.f90 (Arbeitskopie)
@@ -1,5 +1,5 @@
! { dg-do compile }
-! { dg-options "-std=f95 -Wall" }
+! { dg-options "-std=f95 -Wall -Wno-conversion" }
!
! PR fortran/34915
! Testcase contributed by Al Greynolds via comp.lang.fortran.
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Subject: [Bug fortran/92178] Segmentation fault after passing allocatable array as intent(out) and its element as value into the same subroutine
Date: Tue, 22 Oct 2019 20:18:00 -0000
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--- Comment #3 from Steve Kargl <sgk at troutmask dot apl.washington.edu> ---
On Tue, Oct 22, 2019 at 07:32:59PM +0000, kargl at gcc dot gnu.org wrote:
>
> The effect of the intent(out) in assign is to deallocate the code on entry to
> assign. This is done with the if-block. The side-effect of evaluating the
> first dummy argument is that 'a' in the expression of the 2nd dummy argument is
> undefined.
>
> F2018 (well 18-007r1) page 308:
>
> If a dummy argument has INTENT (OUT) or INTENT (INOUT), the actual
> argument shall be definable. If a dummy argument has INTENT (OUT)
> and its associated actual argument is allocated, the actual argument
> is deallocated on procedure invocation (9.7.3.2).
>
> then later
>
> 15.5.2.13 Restrictions on entities associated with dummy arguments
>
> While an entity is associated with a dummy argument, the following
> restrictions hold.
>
> (1) Action that affects the allocation status of the entity or a
> subobject thereof shall be taken through the dummy argument.
>
> (2) If the allocation status of the entity or a subobject thereof
> is affected through the dummy argument, then at any time during
> the invocation and execution of the procedure, either before or
> after the allocation or deallocation, it shall be referenced only
> through the dummy argument.
>
> It seems that code is non-conforming.
>
Seems to be some wiggle room.
15.5.4 Subroutine reference
A subroutine is invoked by execution of a CALL statement, ...
When a subroutine is invoked, all actual argument expressions are
evaluated, then the arguments are associated, and then the subroutine
is executed.
So, it comes down to when the deallocation occur? P. 308 says the
deallocation occurs when the procedure is invoked. But, 15.5.4
defines the sequence of events that occur when it procedure is
invoked. Is the reference to the subroutine name the initiation
of invocation? No where does it say when the deallocation occurs.
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Subject: [Bug fortran/87851] [8/9/10 Regression] Wrong return type for len_trim
Date: Tue, 22 Oct 2019 21:03:00 -0000
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--- Comment #9 from anlauf at gcc dot gnu.org ---
The following may be necessary in addition to the patch in comment#8:
Index: gcc/fortran/simplify.c
===================================================================
--- gcc/fortran/simplify.c (Revision 277298)
+++ gcc/fortran/simplify.c (Arbeitskopie)
@@ -4479,7 +4479,7 @@ gfc_simplify_len_trim (gfc_expr *e, gfc_expr *kind
{
gfc_expr *result;
size_t count, len, i;
- int k = get_kind (BT_INTEGER, kind, "LEN_TRIM", gfc_default_integer_kind);
+ int k = get_kind (BT_INTEGER, kind, "LEN_TRIM", gfc_charlen_int_kind);
if (k == -1)
return &gfc_bad_expr;
I think the scalarizer issue mentioned in comment#1 is a separate issue.
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Subject: [Bug fortran/92178] Segmentation fault after passing allocatable array as intent(out) and its element as value into the same subroutine
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--- Comment #4 from Vladimir Fuka <vladimir.fuka at gmail dot com> ---
It would be really strange if even expressions like below were not possible.
implicit none
integer, allocatable :: a(:)
allocate(a, source=[1])
call assign(a, (min(a(1)**2,0)))
print *, allocated(a)
contains
subroutine assign(a, i)
integer, allocatable, intent(out) :: a(:)
integer, value :: i
print *, i
end subroutine
end program
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/92178] Segmentation fault after passing allocatable array as intent(out) and its element as value into the same subroutine
Date: Tue, 22 Oct 2019 21:30:00 -0000
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--- Comment #5 from Steve Kargl <sgk at troutmask dot apl.washington.edu> ---
On Tue, Oct 22, 2019 at 09:03:42PM +0000, vladimir.fuka at gmail dot com wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92178
>
> --- Comment #4 from Vladimir Fuka <vladimir.fuka at gmail dot com> ---
> It would be really strange if even expressions like below were not possible.
>
> implicit none
> integer, allocatable :: a(:)
> allocate(a, source=[1])
> call assign(a, (min(a(1)**2,0)))
> print *, allocated(a)
> contains
> subroutine assign(a, i)
> integer, allocatable, intent(out) :: a(:)
> integer, value :: i
> print *, i
> end subroutine
> end program
Yep. I agree. In fact, if you reverse the arguments, like,
implicit none
integer, allocatable :: a(:)
allocate(a, source=[1])
call assign((min(a(1)**2,0)), a)
print *, allocated(a)
contains
subroutine assign(i, a)
integer, allocatable, intent(out) :: a(:)
integer, value :: i
print *, i
end subroutine
end
gfortran gives
% gfcx -o z a.f90 && ./z
0
F
Cutting the -ftree-dump-original down to the 'call' statement
gives
MAIN__ ()
{
{
integer(kind=4) D.3955;
integer(kind=4) D.3956;
integer(kind=4) M.7;
D.3955 = (*(integer(kind=4)[0:] * restrict) a.data)[a.offset + 1];
D.3956 = D.3955 * D.3955;
M.7 = D.3956;
M.7 = MIN_EXPR <M.7, 0>;
if ((integer(kind=4)[0:] * restrict) a.data != 0B)
{
__builtin_free ((void *) a.data);
(integer(kind=4)[0:] * restrict) a.data = 0B;
}
assign (M.7, &a);
}
}
which shows the argument evaluation is done correctly. In short,
gfortran needs to scan the effective and dummy arguments for a
deallocation and just do the right thing.
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Subject: [Bug fortran/87851] [8/9/10 Regression] Wrong return type for len_trim
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--- Comment #10 from anlauf at gcc dot gnu.org ---
Forget comment#8 and comment#9. The standard declares the default kind
of LEN_TRIM to be that of default integer.
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Subject: [Bug c++/91548] [10 Regression] Regression in constexpr evaluation of std::array
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--- Comment #7 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Thanks.
Reduced (no templates, no lambda):
constexpr int& impl(const int (&array)[10], int index) {
return const_cast<int&>(array[index]);
}
struct A {
constexpr int& operator[](int i) { return impl(elems, i); }
int elems[10];
};
constexpr bool
f()
{
A arr = {};
arr[2] = true;
return false;
}
constexpr bool b = f();
>From gcc-bugs-return-657246-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 22:22:48 2019
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Subject: [Bug fortran/92178] Segmentation fault after passing allocatable array as intent(out) and its element as value into the same subroutine
Date: Tue, 22 Oct 2019 22:22:00 -0000
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--- Comment #6 from Steve Kargl <sgk at troutmask dot apl.washington.edu> ---
On Tue, Oct 22, 2019 at 09:30:14PM +0000, sgk at troutmask dot
apl.washington.edu wrote:
>
> Cutting the -ftree-dump-original down to the 'call' statement
> gives
>
> MAIN__ ()
> {
> {
> integer(kind=4) D.3955;
> integer(kind=4) D.3956;
> integer(kind=4) M.7;
>
> D.3955 = (*(integer(kind=4)[0:] * restrict) a.data)[a.offset + 1];
> D.3956 = D.3955 * D.3955;
> M.7 = D.3956;
> M.7 = MIN_EXPR <M.7, 0>;
> if ((integer(kind=4)[0:] * restrict) a.data != 0B)
> {
> __builtin_free ((void *) a.data);
> (integer(kind=4)[0:] * restrict) a.data = 0B;
> }
> assign (M.7, &a);
> }
> }
>
> which shows the argument evaluation is done correctly. In short,
> gfortran needs to scan the effective and dummy arguments for a
> deallocation and just do the right thing.
>
The evaluation of arguments seems to be done in trans-expr.c
gfc_conv_procedure_call(), where the argument list is simply
walked and evaluated. That's not good as this pr shows. :(
>From gcc-bugs-return-657247-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 22 23:18:13 2019
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Subject: [Bug fortran/92178] Segmentation fault after passing allocatable array as intent(out) and its element as value into the same subroutine
Date: Tue, 22 Oct 2019 23:18:00 -0000
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--- Comment #7 from Steve Kargl <sgk at troutmask dot apl.washington.edu> ---
On Tue, Oct 22, 2019 at 10:22:42PM +0000, sgk at troutmask dot
apl.washington.edu wrote:
> --- Comment #6 from Steve Kargl <sgk at troutmask dot apl.washington.edu> ---
> On Tue, Oct 22, 2019 at 09:30:14PM +0000, sgk at troutmask dot
> apl.washington.edu wrote:
> >
> > Cutting the -ftree-dump-original down to the 'call' statement
> > gives
> >
> > MAIN__ ()
> > {
> > {
> > integer(kind=4) D.3955;
> > integer(kind=4) D.3956;
> > integer(kind=4) M.7;
> >
> > D.3955 = (*(integer(kind=4)[0:] * restrict) a.data)[a.offset + 1];
> > D.3956 = D.3955 * D.3955;
> > M.7 = D.3956;
> > M.7 = MIN_EXPR <M.7, 0>;
> > if ((integer(kind=4)[0:] * restrict) a.data != 0B)
> > {
> > __builtin_free ((void *) a.data);
> > (integer(kind=4)[0:] * restrict) a.data = 0B;
> > }
> > assign (M.7, &a);
> > }
> > }
> >
> > which shows the argument evaluation is done correctly. In short,
> > gfortran needs to scan the effective and dummy arguments for a
> > deallocation and just do the right thing.
> >
>
> The evaluation of arguments seems to be done in trans-expr.c
> gfc_conv_procedure_call(), where the argument list is simply
> walked and evaluated. That's not good as this pr shows. :(
>
There is a massive for-loop (lines: 5478-6638) that is used
for the evaluation of arguments. Within those lines, the
blocks 5924-5981, 6071-6111, and 6242-6273 are used to
delete allocated actual args for intent(out) dummy args.
I suspect that those blocks need to be removed, and second
following for-loop should scan the arg list to do the
deallocations.
>From gcc-bugs-return-657248-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 23 00:22:15 2019
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From: "sethml at ofb dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/92172] ARM Thumb2 frame pointers inconsistent with clang
Date: Wed, 23 Oct 2019 00:22:00 -0000
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--- Comment #2 from Seth LaForge <sethml at ofb dot net> ---
Good point on frame pointers vs a frame chain for unwinding. I'm looking for
the unwindable frame chain.
Wilco:
> Why does this matter? Well as your examples show, if you want to emit a frame
> chain using standard push/pop, it typically ends up pointing to the top of the
> frame. That is the worst possible position for a frame pointer on Thumb - while
> Arm supports negative immediate offsets up to 4KB, Thumb-1 doesn't support
> negative offsets at all, and Thumb-2 supports offsets up to -255 but only with
> 32-bit instructions. So the result of conflating the frame chain and frame
> pointer implies a terrible codesize hit for Thumb.
Well, there's really no need for a frame pointer for efficiency, since the
stack frame can be efficiently accessed with positive immediate accesses
relative to the stack pointer. There are even special encodings for Thumb-2
16-bit LDR/STR which allow an immediate offset of 0 to 1020 when relative to SP
- much larger than other registers. You're saying using a frame pointer implies
a terrible codesize hit for Thumb, but I don't see how that can be - stack
access will continue to go through SP, and the only code size hit should be
pushing/popping R7 (~2 cycles), computing R7 as a frame pointer (~1 cycle), and
potential register spills due to one less register available. That's a pretty
small amount of overhead for a non-leaf function.
> Your examples suggest LLVM suffers from both of these issues, and IIRC it still
> uses r11 on Arm but r7 on Thumb. That is way too inefficient/incorrect to consider
> a defacto standard.
Using R11 in ARM and R7 on Thumb is mandated by the AAPCS I believe. I don't
think the overhead is likely to be particularly different in Thumb vs ARM.
Numbers talk, so I collected some benchmarks on some production firmware used
in self-driving cars. This code is executing on a Cortex-R5F MCU, processing a
large amount of data, with a wide variety of function sizes. Unfortunately
precise benchmarking on this MCU is difficult - there seem to be swings of a
few percent in performance due to changes in code alignment, but the rough
results have been reliable. I'm collecting .text size and time spent in
computation. Unfortunately we're using a pretty old version of gcc, but the
frame pointer generation doesn't seem to have changed in newer releases.
Baseline: With gcc 4.7, -fomit-frame-pointer, -mthumb: 384016 bytes, 110.943 s.
With gcc 4.7, -fno-omit-frame-pointer, -mthumb: 396688 bytes, 113.539 s.
This shows a +3.2% size overhead and +2.3% time overhead for enabling frame
pointers in Thumb-2 code.
With gcc 4.7, -fomit-frame-pointer, ARM mode: 487152 bytes, 113.874 s.
That's +26.9% size and +2.6% time over -mthumb.
With gcc 4.7, -fno-omit-frame-pointer, ARM mode: 498064 bytes, 116.936 s.
This shows a +2.7% size overhead and +2.7% time overhead for enabling frame
pointers in Thumb-2 code.
Within margin of error, it appears the frame pointer overhead is comparable in
Thumb-2 and ARM code.
With clang 7, -fomit-frame-pointer, -mthumb: 371008 bytes, 107.072 s.
That's -3.4% size and -3.5% time over gcc 4.7.
With clang 7, -fomit-frame-pointer, -mthumb: 377296 bytes, 110.868 s.
This shows a +1.7% size overhead and +3.5% time overhead for enabling frame
pointers in Thumb-2 code for clang 7.
Within margin of error, it appears clang's frame pointer overhead is slightly
higher than gcc's for Thumb-2, but not much.
With clang 7, -fomit-frame-pointer, ARM mode: 458592 bytes, 112.829 s.
That's +21.5% size +1.8% time over clang -mthumb.
With clang 7, -fno-omit-frame-pointer, ARM mode: 463440 bytes, 111.796 s.
That's +1.1% size -0.9% time over clang ARM without frame pointers. I'm a bit
mystified by this result - I looked at the generated code and it does what I'd
expect, so I think this is just benchmarking variation due to caches/alignment.
For my application, a ~2.5% performance hit is very worthwhile to gain the
extra debugability of easy stack traces. I'll probably end up switching over to
clang and frame pointers. It'd be nice if people using gcc for embedded ARM
development had an easy option for generating stack traces.
>From gcc-bugs-return-657249-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 23 02:27:30 2019
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Subject: [Bug middle-end/92183] New: gcc tries to create a relocation in a mergeable section
Date: Wed, 23 Oct 2019 02:27:00 -0000
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Given
struct foo {
const char *bar;
const char *zed;
};
void g(struct foo *r);
void f() {
struct foo t = {"bar", "zed"};
g(&t);
}
gcc -O3 produces
.section .rodata.str1.1,"aMS",@progbits,1
.LC0:
.string "bar"
.LC1:
.string "zed"
....
.section .rodata.cst8,"aM",@progbits,8
.align 8
.LC2:
.quad .LC1
While it is not illegal to have a relocation in a mergeable section, I don't
know of any linker that supports that, so gcc is being over aggressive.
>From gcc-bugs-return-657251-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 23 04:14:36 2019
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Subject: [Bug c++/87403] [Meta-bug] Issues that suggest a new warning
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Bug 87403 depends on bug 49574, which changed state.
Bug 49574 Summary: Give a warning for insane overloading
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=49574
What |Removed |Added
----------------------------------------------------------------------------
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Subject: [Bug c++/49574] Give a warning for insane overloading
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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--- Comment #8 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #7)
> OK here's the documentation patch:
>
> --- a/gcc/doc/invoke.texi
> +++ b/gcc/doc/invoke.texi
> @@ -3383,6 +3383,11 @@ object to the same type, to a base class of that
> type, or to void; such
> a conversion function will never be called.
> @end table
>
> +@item -Winsane-overloading @r{(C++ and Objective-C++ only)}
> +@opindex Winsane-overloading
> +@opindex Wno-insane-overloading
> +Warn about whatever was agreed to in Bugzilla.
> +
> @node Objective-C and Objective-C++ Dialect Options
> @section Options Controlling Objective-C and Objective-C++ Dialects
>
>
> The rest should be a simple matter of programming.
>
> More seriously, I'm not the one asking for the warning, so it's not up to me
> to describe what's wanted.
All right fine; I guess I'll close this then...
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Subject: [Bug c++/92053] Compilation fails or succeeds depending on the optimization flags
Date: Wed, 23 Oct 2019 05:26:00 -0000
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Kamlesh Kumar <kamleshbhalui at gmail dot com> changed:
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----------------------------------------------------------------------------
CC| |kamleshbhalui at gmail dot com
--- Comment #4 from Kamlesh Kumar <kamleshbhalui at gmail dot com> ---
(In reply to Antony Polukhin from comment #2)
> Reduced version. Note that Clang reduces to compile it with any -O, while
> GCC is fine with it on -O0 https://godbolt.org/z/yTM0a4 :
>
Clang fails to compile it regardless of any optimization.
see at https://godbolt.org/z/jP0Ct2
>From gcc-bugs-return-657253-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 23 06:21:01 2019
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Subject: [Bug c++/68781] [concepts] requires in member function is not unevaluated
Date: Wed, 23 Oct 2019 06:21:00 -0000
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Mitsuru Kariya <kariya_mitsuru at hotmail dot com> changed:
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--- Comment #1 from Mitsuru Kariya <kariya_mitsuru at hotmail dot com> ---
This compiles with current trunk.
>From gcc-bugs-return-657254-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 23 06:43:21 2019
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From: "dcb314 at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/92184] New: [ASAN] errors in bootstrap
Date: Wed, 23 Oct 2019 06:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92184
Bug ID: 92184
Summary: [ASAN] errors in bootstrap
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: dcb314 at hotmail dot com
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I tried an asan bootstrap on fortran with recent bootstrap and got this:
================================================================
==230053==ERROR: AddressSanitizer: heap-use-after-free on address
0x6140000692a0 at pc 0x00000306907a bp 0x7fffad4ef940 sp 0x7fffad4ef938
READ of size 8 at 0x6140000692a0 thread T0
#0 0x3069079 in vect_analyze_loop(loop*, _loop_vec_info*, vec_info_shared*)
../../trunk/gcc/tree-vect-loop.c:2394
Problem seems to first appear sometime between revision 277000 and 277250.
Configure line is
../trunk/configure --prefix=/home/dcb/gcc/results.277250.asan \
--with-build-config=bootstrap-asan \
--disable-multilib \
--disable-werror \
--enable-checking=yes \
--enable-languages=c,c++,fortran
>From gcc-bugs-return-657255-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 23 07:13:12 2019
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Subject: [Bug middle-end/92183] gcc tries to create a relocation in a mergeable section
Date: Wed, 23 Oct 2019 07:13:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-10-23
Version|unknown |9.2.1
Ever confirmed|0 |1
Known to fail| |7.4.0
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Hmm, so we'd need to move those constants to the regular .rodata then.
I'll file it as missed-optimization as linkers might to decide to drop
the mergeable flag once it sees relocations in the section.
>From gcc-bugs-return-657256-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 23 07:14:27 2019
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Subject: [Bug fortran/92184] [ASAN] errors in bootstrap
Date: Wed, 23 Oct 2019 07:14:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |rsandifo at gcc dot gnu.org
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
I think Richard fixed sth like this with
2019-10-22 Richard Sandiford <richard.sandiford@arm.com>
* tree-vect-slp.c (vect_slp_bb_region): Check whether
autodetected_vector_size rather than vector_size is zero.
* tree-vect-loop.c (vect_analyze_loop): Likewise.
Set autodetected_vector_size immediately after calling
vect_analyze_loop_2. Check for a fatal error before advancing
next_size.
>From gcc-bugs-return-657257-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 23 07:16:57 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/92179] [10 regression] r277288 causes ICEs compiling several test cases
Date: Wed, 23 Oct 2019 07:16:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2019-10-23
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> ---
Sigh. Mine. Obviously.
>From gcc-bugs-return-657258-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 23 07:21:27 2019
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From: "linkw at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/92185] New: ICE when perform condition reduction vectorization on uchar ind var
Date: Wed, 23 Oct 2019 07:21:00 -0000
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Bug ID: 92185
Summary: ICE when perform condition reduction vectorization on
uchar ind var
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
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Target Milestone: ---
TESTCASE:
#include "tree-vect.h"
extern void abort (void) __attribute__ ((noreturn));
#define N 27
unsigned char
condition_reduction (short *a, short min_v)
{
unsigned char last = 0;
for (unsigned char i = 0; i < 27; i++)
if (a[i] < min_v)
last = i;
return last;
}
int
main (void)
{
short a[27] = {
11, 12, 13, 14, 15, 16, 17, 18, 19, 20,
1, 2, 3, 4, 5, 6, 7, 8, 9, 10,
21, 22, 23, 24, 25, 26, 27
};
check_vect ();
int ret = condition_reduction (a, 10);
if (ret != 18)
abort ();
return 0;
}
BTW, tree-vect.h is from gcc/testsuite/gcc.dg/vect/tree-vect.h
Options: -Ofast -fno-inline -fdump-tree-vect-details
-fvect-cost-model=unlimited
ICE backtrace:
13 | condition_reduction (short *a, short min_v)
| ^~~~~~~~~~~~~~~~~~~
0x115016ff vect_create_epilog_for_reduction
/home/linkw/gcc/gcc-git-fix/gcc/tree-vect-loop.c:4252
0x1150ccb3 vectorizable_live_operation(_stmt_vec_info*, gimple_stmt_iterator*,
_slp_tree*, _slp_instance*, int, bool, vec<stmt_info_for_cost, va_heap,
vl_ptr>*)
/home/linkw/gcc/gcc-git-fix/gcc/tree-vect-loop.c:7478
0x114df9bf can_vectorize_live_stmts
/home/linkw/gcc/gcc-git-fix/gcc/tree-vect-stmts.c:10578
0x114e1933 vect_transform_stmt(_stmt_vec_info*, gimple_stmt_iterator*,
_slp_tree*, _slp_instance*)
/home/linkw/gcc/gcc-git-fix/gcc/tree-vect-stmts.c:11031
0x1150e9d7 vect_transform_loop_stmt
/home/linkw/gcc/gcc-git-fix/gcc/tree-vect-loop.c:7918
0x1150f73f vect_transform_loop(_loop_vec_info*)
/home/linkw/gcc/gcc-git-fix/gcc/tree-vect-loop.c:8133
0x1154acc7 try_vectorize_loop_1
/home/linkw/gcc/gcc-git-fix/gcc/tree-vectorizer.c:982
0x1154aff3 try_vectorize_loop
/home/linkw/gcc/gcc-git-fix/gcc/tree-vectorizer.c:1035
0x1154b243 vectorize_loops()
/home/linkw/gcc/gcc-git-fix/gcc/tree-vectorizer.c:1115
0x1132976f execute
/home/linkw/gcc/gcc-git-fix/gcc/tree-ssa-loop.c:414
>From gcc-bugs-return-657259-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 23 07:39:02 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/92186] New: [concepts] requires expression outside of concept definition cannot return false
Date: Wed, 23 Oct 2019 07:39:00 -0000
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Bug ID: 92186
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definition cannot return false
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Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: kariya_mitsuru at hotmail dot com
Target Milestone: ---
The sample code below cannot be compiled by current trunk.
==========================
template <typename T>
int foo()
{
if (requires(T i) {
i++;
}) {
return 42;
} else {
return 99;
}
}
int main()
{
return foo<bool>();
}
==========================
cf. https://wandbox.org/permlink/6S5cGSAJHBL86cfi
According to C++ standard draft N4835 [expr.prim.req] p.6,
> The substitution of template arguments into a requires-expression
> may result in the formation of invalid types or expressions in its
> requirements or the violation of the semantic constraints of those
> requirements.
> In such cases, the requires-expression evaluates to false; it does
> not cause the program to be ill-formed.
So I think that the code should be compiled successfully.
Note that the code below can be compiled.
==========================
template <typename T>
concept can_increment = requires(T i) {
i++;
};
template <typename T>
int foo()
{
if (can_increment<T>) {
return 42;
} else {
return 99;
}
}
int main()
{
return foo<bool>();
}
==========================
cf. https://wandbox.org/permlink/VCqlkJwZHKNxZIaE
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/92109] [10 Regression] ICE in modify_call_stmt, at ipa-param-manipulation.c:1586
Date: Wed, 23 Oct 2019 08:14:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92109
--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Created attachment 47088
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47088&action=edit
Reduced test-case
>From gcc-bugs-return-657261-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 23 08:14:32 2019
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From: "kariya_mitsuru at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/92187] New: [concepts] An abbreviated function template ignores type constraint in some circumstances
Date: Wed, 23 Oct 2019 08:14:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92187
Bug ID: 92187
Summary: [concepts] An abbreviated function template ignores
type constraint in some circumstances
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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The sample code below is compiled successfully by current trunk.
==========================
template <typename>
concept C = false;
C auto f(auto)
{
return 42;
}
int main()
{
return f(0);
}
==========================
cf. https://wandbox.org/permlink/BXPESMeiWSoUSmTn
According to C++ standard draft N4835 [dcl.type.auto.deduct] p.6,
> For a placeholder-type-specifier with a type-constraint, the immediately-declared
> constraint of the type-constraint for the type deduced for the placeholder shall
> be satisfied.
So I think that the code should be failed to compile.
Note that the codes below are failed to compile.
==========================
template <typename>
concept C = false;
// normal(non abbreviated) function template
template <typename T>
C auto f(T)
{
return 42;
}
int main()
{
return f(0);
}
==========================
cf. https://wandbox.org/permlink/j3HfbOv7PbOqSnhj
==========================
template <typename>
concept C = false;
// normal function
C auto f(int)
{
return 42;
}
int main()
{
return f(0);
}
==========================
cf. https://wandbox.org/permlink/blq6P4QgQdgEuPF9
==========================
template <typename>
concept C = false;
// trailing return type
auto f(auto) -> C auto
{
return 42;
}
int main()
{
return f(0);
}
==========================
cf. https://wandbox.org/permlink/JfV8QmbNnjZ4ranP
>From gcc-bugs-return-657263-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 23 08:15:51 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/92109] [10 Regression] ICE in modify_call_stmt, at ipa-param-manipulation.c:1586
Date: Wed, 23 Oct 2019 08:15:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92109
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords|needs-reduction |
Assignee|marxin at gcc dot gnu.org |jamborm at gcc dot gnu.org
--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
I can't reduce it more, so it's hopefully a reasonable small test-case:
$ g++ 1.ii 2.ii 3.ii 4.ii -O3 -flto=auto -shared -fPIC
...
1.ii:42:572: note: code may be misoptimized unless ‘-fno-strict-aliasing’ is
used
during IPA pass: materialize-all-clones
In function ‘throwError.constprop.isra’:
lto1: internal compiler error: in modify_call_stmt, at
ipa-param-manipulation.c:1586
0x59f0b1 ipa_param_body_adjustments::modify_call_stmt(gcall**)
../../gcc/ipa-param-manipulation.c:1586
0xa646b5 remap_gimple_stmt
../../gcc/tree-inline.c:1921
0xa6588f copy_bb
../../gcc/tree-inline.c:1996
0xa66de2 copy_cfg_body
../../gcc/tree-inline.c:2983
0xa66de2 copy_body
../../gcc/tree-inline.c:3231
0xa6ba0c tree_function_versioning(tree_node*, tree_node*, vec<ipa_replace_map*,
va_gc, vl_embed>*, ipa_param_adjustments*, bool, bitmap_head*,
basic_block_def*)
../../gcc/tree-inline.c:6274
0x67a20a cgraph_materialize_clone
../../gcc/cgraphclones.c:1020
0x67a20a symbol_table::materialize_all_clones()
../../gcc/cgraphclones.c:1107
0x85af5f execute
../../gcc/ipa.c:1396
>From gcc-bugs-return-657262-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 23 08:15:45 2019
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From: "fredrik987 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/92188] New: Cannot merge memory write for _mm_cvtps_ph/_mm256_cvtps_ph and x86-64
Date: Wed, 23 Oct 2019 08:15:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92188
Bug ID: 92188
Summary: Cannot merge memory write for
_mm_cvtps_ph/_mm256_cvtps_ph and x86-64
Product: gcc
Version: 9.2.0
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Created attachment 47089
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47089&action=edit
Test code
For this code, the memory write cannot be merged with vcvtps2ph.
void test1(__m128i *x, const __m256 *y)
{
// Cannot merge memory write
*x = _mm256_cvtps_ph(*y, _MM_FROUND_CUR_DIRECTION);
}
...
vcvtps2ph $4, %ymm0, %xmm0
vmovaps %xmm0, (%rdi)
...
A workaround is to change the output type to __v8hi as.
void test2(__v8hi *x, const __m256 *y)
{
// Memory write merged
*x = (__v8hi)_mm256_cvtps_ph(*y, _MM_FROUND_CUR_DIRECTION);
}
...
vcvtps2ph $4, %ymm0, (%rdi)
...
However it does not work for the 128 bit variant of vcvtps2ph.
void test4(__v4hi *x, const __m128 *y)
{
// Cannot merge memory write
*x = (__v4hi)(((__v2di)_mm_cvtps_ph(*y, _MM_FROUND_CUR_DIRECTION))[0]);
}
...
vcvtps2ph $4, %xmm0, %xmm0
vmovq %xmm0, (%rdi)
...
The opposite problem exists for e.g. _mm256_extracti128_si256, which normally
merges the memory write but not for output type __v8hi.
void test6(__v8hi *x, const __m256i *y)
{
// Cannot merge memory write
*x = (__v8hi)_mm256_extracti128_si256(*y, 1);
}
...
vextracti128 $0x1, %ymm0, %xmm0
vmovaps %xmm0, (%rdi)
...
It would be good if all variants behave the same, with memory write merged.
I use "-O3 -march=core-avx2" when compiling (using compiler explorer).
>From gcc-bugs-return-657264-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 23 08:28:41 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/92185] ICE when perform condition reduction vectorization on uchar ind var
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2019-10-23
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mine.
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/92185] ICE when perform condition reduction vectorization on uchar ind var
Date: Wed, 23 Oct 2019 08:32:00 -0000
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Hmm, I can't reproduce this, I tried ppc64le and x86_64.
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Subject: [Bug fortran/92174] runtime error: index 15 out of bounds for type 'gfc_expr *[15]
Date: Wed, 23 Oct 2019 08:49:00 -0000
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--- Comment #10 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to kargl from comment #9)
> fixed on 9-branch and trunk.
Thank you for the fix.
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Subject: [Bug tree-optimization/92185] ICE when perform condition reduction vectorization on uchar ind var
Date: Wed, 23 Oct 2019 08:52:00 -0000
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--- Comment #3 from Kewen Lin <linkw at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #2)
> Hmm, I can't reproduce this, I tried ppc64le and x86_64.
Sorry, my local codebase is on r277221, trying latest trunk.
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Subject: [Bug ipa/91969] Compiling testsuite/g++.dg/ipa/pr85421.C with -fdump-ipa-inline ICEs
Date: Wed, 23 Oct 2019 08:55:00 -0000
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--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Wed Oct 23 08:55:05 2019
New Revision: 277309
URL: https://gcc.gnu.org/viewcvs?rev=277309&root=gcc&view=rev
Log:
Do not ICE in IPA inliner.
2019-10-23 Martin Liska <mliska@suse.cz>
PR ipa/91969
* ipa-inline.c (recursive_inlining): Do not print
when curr->count is not initialized.
2019-10-23 Martin Liska <mliska@suse.cz>
PR ipa/91969
* g++.dg/ipa/pr91969.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/ipa/pr91969.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/ipa-inline.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug ipa/91969] Compiling testsuite/g++.dg/ipa/pr85421.C with -fdump-ipa-inline ICEs
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-657270-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 23 09:18:32 2019
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Subject: [Bug fortran/92184] [ASAN] errors in bootstrap
Date: Wed, 23 Oct 2019 09:18:00 -0000
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rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
Yeah, should have been fixed by that patch, please reopen if not.
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Subject: [Bug fortran/92189] New: Fortran-written bind(C) function with allocatable argument does not update C descriptor on exit
Date: Wed, 23 Oct 2019 09:27:00 -0000
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Bug ID: 92189
Summary: Fortran-written bind(C) function with allocatable
argument does not update C descriptor on exit
Product: gcc
Version: 10.0
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Created attachment 47090
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47090&action=edit
Test case
Follow-up to PR 91863
For allocatable arguments, the allocation data can be updated at the end of the
program. It probably also works with pointers. The ".data" component might be
undefined, but the shape has at least some value - it might not make sense, but
one does not dereference something which will cause invalid memory access.
The attached program shows that '.data' is okay after the call ("print *,
a(0:2)" shows the data), but the shape and the bounds are 0.
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Subject: [Bug c/92172] ARM Thumb2 frame pointers inconsistent with clang
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--- Comment #3 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
(In reply to Seth LaForge from comment #2)
> Using R11 in ARM and R7 on Thumb is mandated by the AAPCS I believe. I don't
> think the overhead is likely to be particularly different in Thumb vs ARM.
No it doesn't. The AAPCS for AArch32 makes no reference to a frame pointer, so
there is no portable way defined for walking a frame other than by using dwarf
records or C++ unwinding descriptions. The latter are preferred, but only
support unwinding from 'synchronous' unwind points (after the prologue and
before the epilogue).
Compilers are, of course, free to use frame pointers internally, within a
frame, but there is no frame chain that can be walked.
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Subject: [Bug target/92190] New: [10 Regression] ICE in sp_valid_at, at config/i386/i386.c:6162 since r276648
Date: Wed, 23 Oct 2019 10:06:00 -0000
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Bug ID: 92190
Summary: [10 Regression] ICE in sp_valid_at, at
config/i386/i386.c:6162 since r276648
Product: gcc
Version: 10.0
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Following is causing an ICE:
$ cat ice.i
typedef char VC __attribute__((vector_size(16)));
typedef int VI2 __attribute__((vector_size(16 * sizeof 0)));
VC a;
VI2 b;
void fn1() {
VC k = a;
VI2 n = b;
fn1(n);
fn1(k);
}
$ gcc ice.i -mabi=ms -O2 -mavx512f -c
during RTL pass: pro_and_epilogue
ice.i: In function ‘fn1’:
ice.i:10:1: internal compiler error: in sp_valid_at, at config/i386/i386.c:6162
10 | }
| ^
0x75bd66 sp_valid_at
/home/marxin/Programming/gcc/gcc/config/i386/i386.c:6162
0x75bd66 sp_valid_at
/home/marxin/Programming/gcc/gcc/config/i386/i386.c:6156
0x10f8bf5 choose_basereg
/home/marxin/Programming/gcc/gcc/config/i386/i386.c:6198
0x10f8fc5 choose_baseaddr
/home/marxin/Programming/gcc/gcc/config/i386/i386.c:6311
0x10f9076 ix86_emit_save_reg_using_mov
/home/marxin/Programming/gcc/gcc/config/i386/i386.c:6360
0x110dc65 ix86_emit_save_sse_regs_using_mov
/home/marxin/Programming/gcc/gcc/config/i386/i386.c:6449
0x110ee70 ix86_expand_prologue()
/home/marxin/Programming/gcc/gcc/config/i386/i386.c:8250
0x14415fb gen_prologue()
/home/marxin/Programming/gcc/gcc/config/i386/i386.md:13118
0x10ff9c8 target_gen_prologue
/home/marxin/Programming/gcc/gcc/config/i386/i386.md:19650
0xad99be make_prologue_seq
/home/marxin/Programming/gcc/gcc/function.c:5757
0xad9b83 thread_prologue_and_epilogue_insns()
/home/marxin/Programming/gcc/gcc/function.c:5874
0xada282 rest_of_handle_thread_prologue_and_epilogue
/home/marxin/Programming/gcc/gcc/function.c:6365
0xada282 execute
/home/marxin/Programming/gcc/gcc/function.c:6407
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
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Subject: [Bug target/92190] [10 Regression] ICE in sp_valid_at, at config/i386/i386.c:6162 since r276648
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed| |2019-10-23
Known to work| |9.2.0
Host| |x86_64-linux-gnu
Target Milestone|--- |10.0
Known to fail| |10.0
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Subject: [Bug tree-optimization/92179] [10 regression] r277288 causes ICEs compiling several test cases
Date: Wed, 23 Oct 2019 10:29:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92179
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed. Hopefully without more fallout ...
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Subject: [Bug tree-optimization/92179] [10 regression] r277288 causes ICEs compiling several test cases
Date: Wed, 23 Oct 2019 10:30:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92179
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Oct 23 10:29:36 2019
New Revision: 277310
URL: https://gcc.gnu.org/viewcvs?rev=277310&root=gcc&view=rev
Log:
2019-10-23 Richard Biener <rguenther@suse.de>
PR tree-optimization/92179
* tree-vect-stmts.c (vectorizable_shift): For shift args
that are all the same remove type restriction in the SLP case.
Adjust SLP code to handle converting of the shift arg to
only apply in case the modes are different.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree-vect-stmts.c
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Subject: [Bug debug/91887] [7/8/9 Regression] -fdebug-types-section ICE building chromium
Date: Wed, 23 Oct 2019 10:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91887
--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Oct 23 10:32:06 2019
New Revision: 277312
URL: https://gcc.gnu.org/viewcvs?rev=277312&root=gcc&view=rev
Log:
2019-10-23 Richard Biener <rguenther@suse.de>
Backport from mainline
2019-10-17 Richard Biener <rguenther@suse.de>
PR debug/91887
* dwarf2out.c (gen_formal_parameter_die): Also try to match
context_die against a DW_TAG_GNU_formal_parameter_pack parent.
* g++.dg/debug/dwarf2/pr91887.C: New testcase.
Added:
branches/gcc-9-branch/gcc/testsuite/g++.dg/debug/dwarf2/pr91887.C
Modified:
branches/gcc-9-branch/gcc/ChangeLog
branches/gcc-9-branch/gcc/dwarf2out.c
branches/gcc-9-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-657278-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 23 10:49:46 2019
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Subject: [Bug fortran/92191] New: internal compiler error: Segmentation fault
Date: Wed, 23 Oct 2019 10:49:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92191
Bug ID: 92191
Summary: internal compiler error: Segmentation fault
Product: gcc
Version: 7.4.0
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Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
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Created attachment 47091
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47091&action=edit
source file
E:\ISOPERF\SRC>cat fosyan.s
.file "fosyan.f"
E:\ISOPERF\SRC>gfortran -g -ffpe-trap=zero,overflow,underflow -fdollar-ok
-save-temps -c fosyan.f
fosyan.f:1:0:
PROGRAM FOSYAN
internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://gcc.gnu.org/bugs/> for instructions.
E:\ISOPERF\SRC>gfortran -dumpversion
7.4.0
E:\ISOPERF\SRC>uname
CYGWIN_NT-6.1
Microsoft Windows [Version 6.1.7601] Service Pack 1
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Subject: [Bug fortran/92191] internal compiler error: Segmentation fault
Date: Wed, 23 Oct 2019 10:52:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2019-10-23
CC| |marxin at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
I can't reproduce that on a Linux system. Can you please run it in debugger
with -wrapper gdb,--args and print a backtrace?
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Subject: [Bug fortran/92191] internal compiler error: Segmentation fault
Date: Wed, 23 Oct 2019 11:03:00 -0000
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--- Comment #2 from John Watts <john_watts at isoparix dot com> ---
Thanks for rapid response, but sorry, need to see full command line you
want.  Tried:
gfortran -g -ffpe-trap=zero,overflow,underflow -fdollar-ok -save-temps
-wrapper gdb --args -c fosyan.f
gfortran: error: unrecognized command line option '--args'
gfortran -g -ffpe-trap=zero,overflow,underflow -fdollar-ok -save-temps
-wrapper gdb -c fosyan.f
gdb: unrecognized option `-ffixed-form'
Use `gdb --help' for a complete list of options.
Regards,
John Watts
john_watts@isoparix.com
Skype: JS.Watts
Tel: +44 (0)20 8549 6501
Mob: +44 (0)774 694 9715
Everything that is Proveable is True.
But not everything that is True is Proveable - and we can prove that.
On 23/10/2019 11:52, marxin at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92191
>
> Martin Liška <marxin at gcc dot gnu.org> changed:
>
> What |Removed |Added
> ----------------------------------------------------------------------------
> Status|UNCONFIRMED |WAITING
> Last reconfirmed| |2019-10-23
> CC| |marxin at gcc dot gnu.org
> Ever confirmed|0 |1
>
> --- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
> I can't reproduce that on a Linux system. Can you please run it in debugger
> with -wrapper gdb,--args and print a backtrace?
>
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Subject: [Bug fortran/92191] internal compiler error: Segmentation fault
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--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
>
>
> gfortran -g -ffpe-trap=zero,overflow,underflow -fdollar-ok -save-temps
> -wrapper gdb --args -c fosyan.f
> gfortran: error: unrecognized command line option '--args'
>
There must be a comma in between gdb and --args:
gfortran ... -wrapper gdb,--args
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Subject: [Bug tree-optimization/92185] ICE when perform condition reduction vectorization on uchar ind var
Date: Wed, 23 Oct 2019 11:13:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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CC| |marxin at gcc dot gnu.org
Resolution|--- |FIXED
--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed on trunk in r277261.
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Subject: [Bug libstdc++/92192] New: Undefined symbols in libstdc++ when compiled with lto
Date: Wed, 23 Oct 2019 11:21:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92192
Bug ID: 92192
Summary: Undefined symbols in libstdc++ when compiled with lto
Product: gcc
Version: 9.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
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I built GCC 9.2.0 with link time optimization (lto) support:
CFLAGS="-flto" \
CXXFLAGS="-flto" \
../configure \
--enable-languages=c,c++ \
--enable-lto \
AR=gcc-ar \
NM=gcc-nm \
RANLIB=gcc-ranlib
make
When checking symbols of libstdc++, I see a huge list of undefined C and one
C++ symbol:
nm -DC ./prev-x86_64-pc-linux-gnu/libstdc++-v3/src/.libs/libstdc++.so.6.0.27 |
grep ' U ' | grep std::
> U std::istream::ignore(long)
> U std::basic_istream<wchar_t, std::char_traits<wchar_t> >::ignore(long)
I could also reproduce this issue with GCC 7.1, 7.4 and 8.3.
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Subject: [Bug tree-optimization/92039] [10 Regression] Spurious -Warray-bounds warnings building 32-bit glibc
Date: Wed, 23 Oct 2019 11:24:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92039
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords|needs-reduction |
CC| |marxin at gcc dot gnu.org
--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
Just for the record a reduced test-case:
int a[3];
void fn1(long b) {
int i;
for (i = 3; i >= b; --i)
a[i] = a[i - b];
}
where does not need -m32:
$ gcc -Werror=array-bounds -O2 -c ice.i
ice.i: In function ‘fn1’:
ice.i:6:6: error: array subscript 3 is above array bounds of ‘int[3]’
[-Werror=array-bounds]
6 | a[i] = a[i - b];
| ~^~~
ice.i:1:5: note: while referencing ‘a’
1 | int a[3];
| ^
cc1: some warnings being treated as errors
$ gcc-9 -Werror=array-bounds -O2 -c ice.i
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Subject: [Bug middle-end/81669] trunk/gcc/fibonacci_heap.h:58: possible missing initialisation ?
Date: Wed, 23 Oct 2019 11:29:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81669
--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Wed Oct 23 11:29:10 2019
New Revision: 277313
URL: https://gcc.gnu.org/viewcvs?rev=277313&root=gcc&view=rev
Log:
Initialize a field in fibonacci_node.
2019-10-23 Martin Liska <mliska@suse.cz>
PR middle-end/81669
* fibonacci_heap.h (fibonacci_node::fibonacci_node):
Initialize m_data.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/fibonacci_heap.h
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Subject: [Bug middle-end/81669] trunk/gcc/fibonacci_heap.h:58: possible missing initialisation ?
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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 on trunk, not planning to backport that.
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Subject: [Bug other/89863] [meta-bug] Issues that static analyzers (cppcheck, clang-static-analyzer) find that gcc misses
Date: Wed, 23 Oct 2019 11:30:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89863
Bug 89863 depends on bug 81669, which changed state.
Bug 81669 Summary: trunk/gcc/fibonacci_heap.h:58: possible missing initialisation ?
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81669
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----------------------------------------------------------------------------
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Subject: [Bug tree-optimization/92163] [10 Regression] ICE: Segmentation fault (in bitmap_set_bit)
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |marxin at gcc dot gnu.org
--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to prathamesh3492 from comment #3)
> Created attachment 47079 [details]
> Untested fix
>
> Does this patch look OK ?
>
> Thanks,
> Prathamesh
Yes, I can confirm the patch works for the reduced test-case.
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Subject: [Bug tree-optimization/92131] [8/9/10 Regression] incorrect assumption that (ao >= 0) is always false
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92131
--- Comment #20 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Author: ebotcazou
Date: Wed Oct 23 11:34:48 2019
New Revision: 277314
URL: https://gcc.gnu.org/viewcvs?rev=277314&root=gcc&view=rev
Log:
PR tree-optimization/92131
* tree-vrp.c (extract_range_from_plus_minus_expr): If the resulting
range would be symbolic, drop to varying for any explicit overflow
in the constant part or if neither range is a singleton.
Added:
trunk/gcc/testsuite/gcc.c-torture/execute/20191023-1.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-vrp.c
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Subject: [Bug tree-optimization/92131] [8/9/10 Regression] incorrect assumption that (ao >= 0) is always false
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--- Comment #21 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Author: ebotcazou
Date: Wed Oct 23 11:37:28 2019
New Revision: 277315
URL: https://gcc.gnu.org/viewcvs?rev=277315&root=gcc&view=rev
Log:
PR tree-optimization/92131
* tree-vrp.c (extract_range_from_plus_minus_expr): If the resulting
range would be symbolic, drop to varying for any explicit overflow
in the constant part or if neither range is a singleton.
Added:
branches/gcc-9-branch/gcc/testsuite/gcc.c-torture/execute/20191023-1.c
- copied unchanged from r277314,
trunk/gcc/testsuite/gcc.c-torture/execute/20191023-1.c
Modified:
branches/gcc-9-branch/gcc/ChangeLog
branches/gcc-9-branch/gcc/testsuite/ChangeLog
branches/gcc-9-branch/gcc/tree-vrp.c
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--- Comment #4 from John Watts <john_watts at isoparix dot com> ---
As directed:
gfortran -g -ffpe-trap=zero,overflow,underflow -fdollar-ok -wrapper
gdb, --args -c fosyan.f
gfortran: error: unrecognized command line option '--args'
Regards,
John Watts
john_watts@isoparix.com
Skype: JS.Watts
Tel: +44 (0)20 8549 6501
Mob: +44 (0)774 694 9715
Everything that is Proveable is True.
But not everything that is True is Proveable - and we can prove that.
On 23/10/2019 12:06, marxin at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92191
>
> --- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
>>
>> gfortran -g -ffpe-trap=zero,overflow,underflow -fdollar-ok -save-temps
>> -wrapper gdb --args -c fosyan.f
>> gfortran: error: unrecognized command line option '--args'
>>
> There must be a comma in between gdb and --args:
> gfortran ... -wrapper gdb,--args
>
>From gcc-bugs-return-657293-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 23 11:39:38 2019
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Subject: [Bug tree-optimization/92163] [10 Regression] ICE: Segmentation fault (in bitmap_set_bit)
Date: Wed, 23 Oct 2019 11:39:00 -0000
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I'm not sure it is what we want though, because it will mean more unnecessary
compile time work, -fnon-call-exceptions is not on by default for most
languages and even if it is, not all stores can throw.
>From gcc-bugs-return-657292-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 23 11:39:17 2019
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Subject: [Bug tree-optimization/92131] [8/9/10 Regression] incorrect assumption that (ao >= 0) is always false
Date: Wed, 23 Oct 2019 11:39:00 -0000
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--- Comment #22 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Author: ebotcazou
Date: Wed Oct 23 11:38:41 2019
New Revision: 277316
URL: https://gcc.gnu.org/viewcvs?rev=277316&root=gcc&view=rev
Log:
PR tree-optimization/92131
* tree-vrp.c (extract_range_from_plus_minus_expr): If the resulting
range would be symbolic, drop to varying for any explicit overflow
in the constant part or if neither range is a singleton.
Added:
branches/gcc-8-branch/gcc/testsuite/gcc.c-torture/execute/20191023-1.c
- copied unchanged from r277314,
trunk/gcc/testsuite/gcc.c-torture/execute/20191023-1.c
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/testsuite/ChangeLog
branches/gcc-8-branch/gcc/tree-vrp.c
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Subject: [Bug tree-optimization/92111] [10 Regression] ICE during GIMPLE pass: dom
Date: Wed, 23 Oct 2019 11:40:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2019-10-23
CC| |marxin at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #7 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Jan from comment #6)
> -fno-semantic-interposition with -flto seems to be the culprit if I drop
> either compile works fine.
>
>
> minimum cflags for error: -march=native -O2 -flto -fno-semantic-interposition
For the -match=native, we'll output of gcc (all your arguments) --verbose.
And also please gcc --version.
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Subject: [Bug fortran/92191] internal compiler error: Segmentation fault
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--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
Replace: gdb, --args
with: gdb,--args
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Subject: [Bug tree-optimization/92039] [10 Regression] Spurious -Warray-bounds warnings building 32-bit glibc
Date: Wed, 23 Oct 2019 11:43:00 -0000
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--- Comment #5 from rguenther at suse dot de <rguenther at suse dot de> ---
On Wed, 23 Oct 2019, marxin at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92039
>
> Martin Liška <marxin at gcc dot gnu.org> changed:
>
> What |Removed |Added
> ----------------------------------------------------------------------------
> Keywords|needs-reduction |
> CC| |marxin at gcc dot gnu.org
>
> --- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
> Just for the record a reduced test-case:
>
> int a[3];
>
> void fn1(long b) {
> int i;
> for (i = 3; i >= b; --i)
> a[i] = a[i - b];
> }
>
> where does not need -m32:
>
> $ gcc -Werror=array-bounds -O2 -c ice.i
> ice.i: In function ‘fn1’:
> ice.i:6:6: error: array subscript 3 is above array bounds of ‘int[3]’
> [-Werror=array-bounds]
> 6 | a[i] = a[i - b];
> | ~^~~
> ice.i:1:5: note: while referencing ‘a’
> 1 | int a[3];
> | ^
> cc1: some warnings being treated as errors
>
> $ gcc-9 -Werror=array-bounds -O2 -c ice.i
The testcase is probably misreduced since the very first iteration
will write to a[3] out of bounds so it only is valid if the loop
is not entered, thus if b < 3.
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/92192] Undefined symbols in libstdc++ when compiled with lto
Date: Wed, 23 Oct 2019 11:45:00 -0000
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Building libstdc++ with -flto is not really supported - we apply a fixed symbol
export set which isn't tuned for its effects. I remember recent fixes in this
area though.
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Subject: [Bug fortran/92191] internal compiler error: Segmentation fault
Date: Wed, 23 Oct 2019 11:47:00 -0000
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--- Comment #6 from John Watts <john_watts at isoparix dot com> ---
e:\ISOPERF\SRC>gfortran -g -ffpe-trap=zero,overflow,underflow -fdollar-ok
-wrapper gdb,--args -c fosyan.f
GNU gdb (GDB) (Cygwin 8.1.1-1) 8.1.1
Copyright (C) 2018 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-pc-cygwin".
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 /usr/lib/gcc/x86_64-pc-cygwin/7.4.0/f951.exe...(no
debugging symbols found)...done.
(gdb) run
Starting program: /usr/lib/gcc/x86_64-pc-cygwin/7.4.0/f951.exe fosyan.f
-ffixed-form -quiet -dumpbase fosyan.f -mtune=generic -march
=x86-64 -auxbase fosyan -g -ffpe-trap=zero,overflow,underflow -fdollar-ok
-fintrinsic-modules-path /usr/lib/gcc/x86_64-pc-cygwin/7.4
.0/finclude -o /cygdrive/c/Users/John/AppData/Local/Temp/ccARjpXR.s
[New Thread 11648.0x1fbc]
[New Thread 11648.0x2e2c]
[New Thread 11648.0x2e8c]
[New Thread 11648.0x1884]
Thread 1 "f951" received signal SIGSEGV, Segmentation fault.
0x00000001004fcf20 in ?? ()
(gdb)
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Subject: [Bug c++/80485] rejects-valid: constexpr static_cast of pointer-to-member-function to bool
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80485
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |eugene at hutorny dot in.ua
--- Comment #10 from Jonathan Wakely <redi at gcc dot gnu.org> ---
*** Bug 67245 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-657299-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 23 11:58:37 2019
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Subject: [Bug c++/67245] static_assert on inline function gives an error
Date: Wed, 23 Oct 2019 11:58:00 -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> ---
Looks like a dup of Bug 80485 which is fixed in GCC 8.2 and later.
*** This bug has been marked as a duplicate of bug 80485 ***
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Subject: [Bug c++/55722] failed static_assert won't trigger a second time
Date: Wed, 23 Oct 2019 12:03:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Last reconfirmed| |2019-10-23
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The diagnostics have changed since GCC 8, so that the ONLY_ONE case no longer
stops after the failed static_assert (which seems like a regression to me):
55722.cc: In instantiation of ‘struct
__assert_callable<std::integral_constant<bool, false> >’:
55722.cc:54:41: required from ‘void call(_Callable&&, _Args&& ...) [with
_Callable = void (&)(int&); _Args = {}]’
55722.cc:62:9: required from here
55722.cc:28:19: error: static assertion failed: Invalid arguments for callable
type
static_assert(_Callable::value, "Invalid arguments for callable type");
^~~~~~~~~
55722.cc: In instantiation of ‘decltype (__check_callable<_Callable, _Args
...>(0)) __bind_simple(_Callable&&, _Args&& ...) [with _Callable = void
(&)(int&); _Args = {}; decltype (__check_callable<_Callable, _Args ...>(0)) =
__assert_callable<std::integral_constant<bool, false> >]’:
55722.cc:54:41: required from ‘void call(_Callable&&, _Args&& ...) [with
_Callable = void (&)(int&); _Args = {}]’
55722.cc:62:9: required from here
55722.cc:47:96: error: could not convert ‘_Bind_simple<void (*())(int&)>((* &
std::forward<void (&)(int&)>((* & __callable))))’ from ‘__bindexpr_type’ {aka
‘_Bind_simple<void (*())(int&)>’} to
‘__assert_callable<std::integral_constant<bool, false> >’
return __bindexpr_type( std::forward<_Callable>(__callable),
std::forward<_Args>(__args)...);
^
When there's a second call the static_assert is only given once, but the "could
not convert" is given twice. So the bug is still present (either the
static_assert should stop compilation, or should produce a diagnostic message
every time it fails).
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Subject: [Bug tree-optimization/91885] [9 Regression] ICE when compiling SPEC 2017 blender benchmark with -O3 -fprofile-generate
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91885
--- Comment #8 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Wed Oct 23 12:12:57 2019
New Revision: 277317
URL: https://gcc.gnu.org/viewcvs?rev=277317&root=gcc&view=rev
Log:
Backport r276141
2019-10-23 Martin Liska <mliska@suse.cz>
Backport from mainline
2019-09-26 Martin Liska <mliska@suse.cz>
PR tree-optimization/91885
* tree-vectorizer.c (try_vectorize_loop_1):
Add TODO_update_ssa_only_virtuals similarly to what slp
pass does.
2019-10-23 Martin Liska <mliska@suse.cz>
Backport from mainline
2019-09-26 Martin Liska <mliska@suse.cz>
PR tree-optimization/91885
* gcc.dg/pr91885.c: New test.
Added:
branches/gcc-9-branch/gcc/testsuite/gcc.dg/pr91885.c
Modified:
branches/gcc-9-branch/gcc/ChangeLog
branches/gcc-9-branch/gcc/testsuite/ChangeLog
branches/gcc-9-branch/gcc/tree-vectorizer.c
>From gcc-bugs-return-657303-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 23 12:14:33 2019
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Subject: [Bug c++/92193] New: Poor diagnostics when a constexpr function call follows a failed static_assert
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92193
Bug ID: 92193
Summary: Poor diagnostics when a constexpr function call
follows a failed static_assert
Product: gcc
Version: 10.0
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If we compile this with NO_CONSTEXPR the diagnostic is fine:
template<typename T>
struct has_foo
{ static constexpr bool value = false; };
template<typename T>
#ifndef NO_CONSTEXPR
constexpr
#endif
bool
foo(T t) noexcept(noexcept(t.foo()))
{ return t.foo(); }
template<typename T>
void
maybe_foo(T t)
{
static_assert( has_foo<T>::value, "has foo" );
foo(t);
}
struct X { };
int main()
{
X x;
maybe_foo(x);
}
ce.cc: In instantiation of ‘void maybe_foo(T) [with T = X]’:
ce.cc:26:14: required from here
ce.cc:17:20: error: static assertion failed: has foo
static_assert( has_foo<T>::value, "has foo" );
^~~~~~~~~~
However, when the function is constexpr the output is much worse:
ce.cc: In instantiation of ‘void maybe_foo(T) [with T = X]’:
ce.cc:23:14: required from here
ce.cc:14:20: error: static assertion failed: has foo
static_assert( has_foo<T>::value, "has foo" );
^~~~~~~~~~
ce.cc: In instantiation of ‘constexpr bool foo(T) [with T = X]’:
ce.cc:15:8: required from ‘void maybe_foo(T) [with T = X]’
ce.cc:23:14: required from here
ce.cc:7:32: error: ‘struct X’ has no member named ‘foo’
foo(T t) noexcept(noexcept(t.foo()))
~~^~~
ce.cc: In instantiation of ‘constexpr bool foo(T) [with T = X]’:
ce.cc:15:8: required from ‘void maybe_foo(T) [with T = X]’
ce.cc:23:14: required from here
ce.cc:7:32: error: ‘struct X’ has no member named ‘foo’
ce.cc:8:14: error: ‘struct X’ has no member named ‘foo’
{ return t.foo(); }
~~^~~
The errors following the static assertion are not useful. The static_assert is
there precisely to make compilation fail, but it doesn't stop errors being
produced from the constexpr function that follows it (even though we're in a
non-constexpr function).
This affects libstdc++ because adding 'constexpr' throughout the library means
that suddenly we get loads more errors in the testsuite and need to tell
dejagnu to ignore them.
>From gcc-bugs-return-657304-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 23 12:17:04 2019
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Subject: [Bug tree-optimization/91885] [9 Regression] ICE when compiling SPEC 2017 blender benchmark with -O3 -fprofile-generate
Date: Wed, 23 Oct 2019 12:17:00 -0000
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--- Comment #9 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Wed Oct 23 12:16:28 2019
New Revision: 277318
URL: https://gcc.gnu.org/viewcvs?rev=277318&root=gcc&view=rev
Log:
Backport r276178
2019-10-23 Martin Liska <mliska@suse.cz>
Backport from mainline
2019-09-27 Jakub Jelinek <jakub@redhat.com>
PR tree-optimization/91885
* gcc.dg/pr91885.c (__int64_t): Change from long to long long.
(__uint64_t): Change from unsigned long to unsigned long long.
Modified:
branches/gcc-9-branch/gcc/testsuite/ChangeLog
branches/gcc-9-branch/gcc/testsuite/gcc.dg/pr91885.c
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Subject: [Bug tree-optimization/91885] [9 Regression] ICE when compiling SPEC 2017 blender benchmark with -O3 -fprofile-generate
Date: Wed, 23 Oct 2019 12:17:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |9.2.1
Resolution|--- |FIXED
--- Comment #10 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed on all affected branches.
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Subject: [Bug c++/92194] New: maybe-uninitialized false positive with c++2a
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Bug ID: 92194
Summary: maybe-uninitialized false positive with c++2a
Product: gcc
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Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: malcolm.parsons at gmail dot com
Target Milestone: ---
For this code:
#include <algorithm>
#include <optional>
#include <string>
void f(const std::string& t)
{
if (std::any_of(t.begin(), t.end(), [](const auto& c) {
return c == 0b01000000;
})) {
std::string s;
std::optional<std::string::const_iterator> f;
for (auto i = t.begin(); i != t.end(); ++i) {
const auto n = *i;
if (n == 0b01000000) {
f = i;
} else if (f) {
std::string_view key(&(**f), 2);
s += key;
f.reset();
}
}
}
}
With gcc 9.2.0,
g++ -std=c++17 -O3 -Wmaybe-uninitialized reports no warnings.
g++ -std=c++2a -O3 -Wmaybe-uninitialized reports:
<source>: In function 'void f(const string&)':
<source>:12:52: warning: 'f' may be used uninitialized in this function
[-Wmaybe-uninitialized]
12 | std::optional<std::string::const_iterator> f;
| ^
See https://gcc.godbolt.org/z/ph3l0u
With gcc trunk, the warning changes to:
<source>: In function 'void f(const string&)':
<source>:15:52: warning: 'f.__gnu_cxx::__normal_iterator<const char*,
std::__cxx11::basic_string<char> >::_M_current' may be used uninitialized in
this function [-Wmaybe-uninitialized]
15 | std::optional<std::string::const_iterator> f;
| ^
See https://gcc.godbolt.org/z/8rGDGi
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Subject: [Bug fortran/91944] [10 Regression] ICE in gfc_conv_array_initializer, at fortran/trans-array.c:6156 since r274997
Date: Wed, 23 Oct 2019 12:28:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2019-10-23
CC| |marxin at gcc dot gnu.org
Known to work| |9.2.0
Assignee|unassigned at gcc dot gnu.org |msebor at gcc dot gnu.org
Target Milestone|--- |10.0
Summary|ICE in |[10 Regression] ICE in
|gfc_conv_array_initializer, |gfc_conv_array_initializer,
|at |at
|fortran/trans-array.c:6156 |fortran/trans-array.c:6156
| |since r274997
Ever confirmed|0 |1
Known to fail| |10.0
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Can be seen on x86_64-linux-gnu.
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--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Martin Liška from comment #2)
> Created attachment 47092 [details]
> Reduced test-case
Sorry, wrong bug.
>From gcc-bugs-return-657308-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 23 12:29:05 2019
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Subject: [Bug fortran/91944] [10 Regression] ICE in gfc_conv_array_initializer, at fortran/trans-array.c:6156 since r274997
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Created attachment 47092
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47092&action=edit
Reduced test-case
>From gcc-bugs-return-657309-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 23 12:29:17 2019
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Subject: [Bug fortran/92191] internal compiler error: Segmentation fault
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--- Comment #7 from John Watts <john_watts at isoparix dot com> ---
(gdb) backtrace
#0 0x00000001004fcf20 in ?? ()
#1 0x00000001004fd4c9 in ?? ()
#2 0x00000001004fd6d0 in ?? ()
#3 0x000000010050aac4 in ?? ()
#4 0x00000001004983af in ?? ()
#5 0x00000001004df32b in ?? ()
#6 0x00000001008fd8ac in ?? ()
#7 0x00000001010e7b8d in ?? ()
#8 0x0000000101107545 in ?? ()
#9 0x000000018004a816 in _cygwin_exit_return () from /usr/bin/cygwin1.dll
#10 0x0000000180048353 in _cygtls::call2(unsigned int (*)(void*, void*), void*,
void*) () from /usr/bin/cygwin1.dll
#11 0x0000000180048404 in _cygtls::call(unsigned int (*)(void*, void*), void*)
() from /usr/bin/cygwin1.dll
#12 0x0000000000000000 in ?? ()
Backtrace stopped: previous frame inner to this frame (corrupt stack?)
(gdb)
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Subject: [Bug fortran/91944] [10 Regression] ICE in gfc_conv_array_initializer, at fortran/trans-array.c:6156
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----------------------------------------------------------------------------
Status|ASSIGNED |UNCONFIRMED
Ever confirmed|1 |0
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Subject: [Bug tree-optimization/91945] [10 Regression] ICE: tree check: expected integer_cst, have var_decl in get_len, at tree.h:5837 since r274997
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What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2019-10-23
CC| |marxin at gcc dot gnu.org
Known to work| |9.2.0
Assignee|unassigned at gcc dot gnu.org |msebor at gcc dot gnu.org
Summary|[10 Regression] ICE: tree |[10 Regression] ICE: tree
|check: expected |check: expected
|integer_cst, have var_decl |integer_cst, have var_decl
|in get_len, at tree.h:5837 |in get_len, at tree.h:5837
| |since r274997
Ever confirmed|0 |1
Known to fail| |10.0
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Subject: [Bug tree-optimization/91945] [10 Regression] ICE: tree check: expected integer_cst, have var_decl in get_len, at tree.h:5837 since r274997
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Created attachment 47093
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47093&action=edit
Reduced test-case
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Subject: [Bug debug/91887] [7/8 Regression] -fdebug-types-section ICE building chromium
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--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Oct 23 12:31:24 2019
New Revision: 277319
URL: https://gcc.gnu.org/viewcvs?rev=277319&root=gcc&view=rev
Log:
2019-10-23 Richard Biener <rguenther@suse.de>
Backport from mainline
2019-10-17 Richard Biener <rguenther@suse.de>
PR debug/91887
* dwarf2out.c (gen_formal_parameter_die): Also try to match
context_die against a DW_TAG_GNU_formal_parameter_pack parent.
* g++.dg/debug/dwarf2/pr91887.C: New testcase.
2019-09-19 Richard Biener <rguenther@suse.de>
PR tree-optimization/91812
* tree-ssa-phiprop.c (propagate_with_phi): Do not replace
volatile loads.
* gcc.dg/torture/pr91812.c: New testcase.
2019-09-17 Richard Biener <rguenther@suse.de>
PR debug/91772
* dwarf2out.c (dwarf2out_late_global_decl): If early dwarf
was missing generate locations only once.
Added:
branches/gcc-8-branch/gcc/testsuite/g++.dg/debug/dwarf2/pr91887.C
branches/gcc-8-branch/gcc/testsuite/gcc.dg/torture/pr91812.c
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/dwarf2out.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
branches/gcc-8-branch/gcc/tree-ssa-phiprop.c
>From gcc-bugs-return-657317-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 23 12:32:17 2019
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Subject: [Bug lto/91772] [8 Regression] ICE in add_dwarf_attr, at dwarf2out.c:4412 since r259749
Date: Wed, 23 Oct 2019 12:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91772
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |8.3.1
Resolution|--- |FIXED
--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug tree-optimization/91812] [7 Regression] GCC ignores volatile modifier
Date: Wed, 23 Oct 2019 12:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91812
--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Oct 23 12:31:24 2019
New Revision: 277319
URL: https://gcc.gnu.org/viewcvs?rev=277319&root=gcc&view=rev
Log:
2019-10-23 Richard Biener <rguenther@suse.de>
Backport from mainline
2019-10-17 Richard Biener <rguenther@suse.de>
PR debug/91887
* dwarf2out.c (gen_formal_parameter_die): Also try to match
context_die against a DW_TAG_GNU_formal_parameter_pack parent.
* g++.dg/debug/dwarf2/pr91887.C: New testcase.
2019-09-19 Richard Biener <rguenther@suse.de>
PR tree-optimization/91812
* tree-ssa-phiprop.c (propagate_with_phi): Do not replace
volatile loads.
* gcc.dg/torture/pr91812.c: New testcase.
2019-09-17 Richard Biener <rguenther@suse.de>
PR debug/91772
* dwarf2out.c (dwarf2out_late_global_decl): If early dwarf
was missing generate locations only once.
Added:
branches/gcc-8-branch/gcc/testsuite/g++.dg/debug/dwarf2/pr91887.C
branches/gcc-8-branch/gcc/testsuite/gcc.dg/torture/pr91812.c
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/dwarf2out.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
branches/gcc-8-branch/gcc/tree-ssa-phiprop.c
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Subject: [Bug lto/91772] [8 Regression] ICE in add_dwarf_attr, at dwarf2out.c:4412 since r259749
Date: Wed, 23 Oct 2019 12:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91772
--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Oct 23 12:31:24 2019
New Revision: 277319
URL: https://gcc.gnu.org/viewcvs?rev=277319&root=gcc&view=rev
Log:
2019-10-23 Richard Biener <rguenther@suse.de>
Backport from mainline
2019-10-17 Richard Biener <rguenther@suse.de>
PR debug/91887
* dwarf2out.c (gen_formal_parameter_die): Also try to match
context_die against a DW_TAG_GNU_formal_parameter_pack parent.
* g++.dg/debug/dwarf2/pr91887.C: New testcase.
2019-09-19 Richard Biener <rguenther@suse.de>
PR tree-optimization/91812
* tree-ssa-phiprop.c (propagate_with_phi): Do not replace
volatile loads.
* gcc.dg/torture/pr91812.c: New testcase.
2019-09-17 Richard Biener <rguenther@suse.de>
PR debug/91772
* dwarf2out.c (dwarf2out_late_global_decl): If early dwarf
was missing generate locations only once.
Added:
branches/gcc-8-branch/gcc/testsuite/g++.dg/debug/dwarf2/pr91887.C
branches/gcc-8-branch/gcc/testsuite/gcc.dg/torture/pr91812.c
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/dwarf2out.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
branches/gcc-8-branch/gcc/tree-ssa-phiprop.c
>From gcc-bugs-return-657318-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 23 12:32:39 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 d/91916] Maybe a dead code in socket.d
Date: Wed, 23 Oct 2019 12:32:00 -0000
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
@Iain: ping
>From gcc-bugs-return-657319-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 23 12:33:43 2019
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From: "dcb314 at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/92184] [ASAN] errors in bootstrap
Date: Wed, 23 Oct 2019 12:33:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92184
--- Comment #3 from David Binderman <dcb314 at hotmail dot com> ---
Problem seems to have gone away at revision 277300.
>From gcc-bugs-return-657321-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 23 12:35:36 2019
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Subject: [Bug middle-end/40135] using alias-set zero for union accesses necessary because of RTL alias oracle
Date: Wed, 23 Oct 2019 12:35:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=40135
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Blocks| |71002
Resolution|--- |FIXED
--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed by
2016-06-29 Richard Biener <rguenther@suse.de>
PR middle-end/71002
* c-common.c (c_common_get_alias_set): Remove union type punning case.
* alias.c (component_uses_parent_alias_set_from): Handle
type punning through union accesses by using the union alias set.
* gimple.c (gimple_get_alias_set): Remove union type punning case.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71002
[Bug 71002] [6 Regression] -fstrict-aliasing breaks Boost's short string
optimization implementation
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Subject: [Bug middle-end/71002] [6 Regression] -fstrict-aliasing breaks Boost's short string optimization implementation
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Bug 71002 depends on bug 40135, which changed state.
Bug 40135 Summary: using alias-set zero for union accesses necessary because of RTL alias oracle
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=40135
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
>From gcc-bugs-return-657322-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 23 12:38:40 2019
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Subject: [Bug debug/90231] ivopts causes <optimized away> iterator in the loop
Date: Wed, 23 Oct 2019 12:38:00 -0000
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--- Comment #20 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Oct 23 12:38:03 2019
New Revision: 277321
URL: https://gcc.gnu.org/viewcvs?rev=277321&root=gcc&view=rev
Log:
PR debug/90231
* tree-ssa-loop-ivopts.c (get_debug_computation_at): New function.
(remove_unused_ivs): Use it instead of get_computation_at. When
choosing best candidate, only consider candidates where
get_debug_computation_at actually returns non-NULL.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree-ssa-loop-ivopts.c
>From gcc-bugs-return-657323-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 23 12:42:26 2019
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/65930] Reduction with sign-change not handled
Date: Wed, 23 Oct 2019 12:42:00 -0000
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--- Comment #19 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Oct 23 12:41:49 2019
New Revision: 277322
URL: https://gcc.gnu.org/viewcvs?rev=277322&root=gcc&view=rev
Log:
2019-10-23 Richard Biener <rguenther@suse.de>
PR tree-optimization/65930
* tree-vect-loop.c (check_reduction_path): Allow conversions
that only change the sign.
(vectorizable_reduction): Relax latch def stmts we handle further.
* gcc.dg/vect/vect-reduc-2char-big-array.c: Adjust.
* gcc.dg/vect/vect-reduc-2char.c: Likewise.
* gcc.dg/vect/vect-reduc-2short.c: Likewise.
* gcc.dg/vect/vect-reduc-dot-s8b.c: Likewise.
* gcc.dg/vect/vect-reduc-pattern-2c.c: Likewise.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/vect/vect-reduc-2char-big-array.c
trunk/gcc/testsuite/gcc.dg/vect/vect-reduc-2char.c
trunk/gcc/testsuite/gcc.dg/vect/vect-reduc-2short.c
trunk/gcc/testsuite/gcc.dg/vect/vect-reduc-dot-s8b.c
trunk/gcc/testsuite/gcc.dg/vect/vect-reduc-pattern-2c.c
trunk/gcc/tree-vect-loop.c
>From gcc-bugs-return-657325-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 23 12:48:43 2019
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Subject: [Bug tree-optimization/92162] [10 Regression] ICE in vect_create_epilog_for_reduction, at tree-vect-loop.c:4252
Date: Wed, 23 Oct 2019 12:48:00 -0000
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Kewen Lin <linkw at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |linkw at gcc dot gnu.org
--- Comment #6 from Kewen Lin <linkw at gcc dot gnu.org> ---
*** Bug 92185 has been marked as a duplicate of this bug. ***
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From: "linkw at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/92185] ICE when perform condition reduction vectorization on uchar ind var
Date: Wed, 23 Oct 2019 12:48:00 -0000
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Kewen Lin <linkw at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Resolution|FIXED |DUPLICATE
--- Comment #5 from Kewen Lin <linkw at gcc dot gnu.org> ---
Confirmed that latest trunk already fixed it and bisect shows the same result
as what Martin pointed out (Thanks Martin).
*** This bug has been marked as a duplicate of bug 92162 ***
>From gcc-bugs-return-657326-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 23 12:55:20 2019
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From: "gcc-bugs at marehr dot dialup.fu-berlin.de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87768] [8 Regression] ICE in tsubst_copy_and_build, at cp/pt.c:19002 when using concepts
Date: Wed, 23 Oct 2019 12:55:00 -0000
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--- Comment #6 from gcc-bugs at marehr dot dialup.fu-berlin.de ---
I can confirm that this works from 9 and up. Is there any chance to backport it
to 8?
In the ticket it says `Target Milestone: 8.4`, does that mean there will be a
8.4 release that fixes this?
>From gcc-bugs-return-657327-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 23 12:56:29 2019
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From: "wilco at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/92172] ARM Thumb2 frame pointers inconsistent with clang
Date: Wed, 23 Oct 2019 12:56:00 -0000
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--- Comment #4 from Wilco <wilco at gcc dot gnu.org> ---
(In reply to Seth LaForge from comment #2)
> Good point on frame pointers vs a frame chain for unwinding. I'm looking for
> the unwindable frame chain.
>
> Wilco:
> > Why does this matter? Well as your examples show, if you want to emit a frame
> > chain using standard push/pop, it typically ends up pointing to the top of the
> > frame. That is the worst possible position for a frame pointer on Thumb - while
> > Arm supports negative immediate offsets up to 4KB, Thumb-1 doesn't support
> > negative offsets at all, and Thumb-2 supports offsets up to -255 but only with
> > 32-bit instructions. So the result of conflating the frame chain and frame
> > pointer implies a terrible codesize hit for Thumb.
>
> Well, there's really no need for a frame pointer for efficiency, since the
> stack frame can be efficiently accessed with positive immediate accesses
> relative to the stack pointer. There are even special encodings for Thumb-2
> 16-bit LDR/STR which allow an immediate offset of 0 to 1020 when relative to
> SP - much larger than other registers. You're saying using a frame pointer
> implies a terrible codesize hit for Thumb, but I don't see how that can be -
> stack access will continue to go through SP, and the only code size hit
> should be pushing/popping R7 (~2 cycles), computing R7 as a frame pointer
> (~1 cycle), and potential register spills due to one less register
> available. That's a pretty small amount of overhead for a non-leaf function.
On GCC10 the codesize overhead of -fno-omit-frame-pointer is 4.1% for Arm and
4.8% for Thumb-2 (measured on SPEC2006). That's already a large overhead,
especially since this feature doesn't do anything useful besides adding
overhead...
The key is that GCC uses the frame pointer for every stack access, and thus the
placement of the frame pointer within a frame matters. Thumb compilers place
the frame pointer at the bottom of the frame so they can efficiently access
locals using positive offsets. Despite that the overhead is significant
already.
If GCC would emit a frame chain like the LLVM sequence this means placing the
frame pointer at the top of the stack. This forces negative frame offsets for
all frame accesses. Getting a 10% overhead is being lucky, I've seen worse...
So this is something that needs to be properly designed and carefully
implemented.
> Baseline: With gcc 4.7, -fomit-frame-pointer, -mthumb: 384016 bytes, 110.943
> s.
Thanks for posting actual numbers, but GCC 4.7?!? It might be time to try
GCC9...
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From: "jan at jki dot io" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/92111] [10 Regression] ICE during GIMPLE pass: dom
Date: Wed, 23 Oct 2019 13:05:00 -0000
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--- Comment #8 from Jan <jan at jki dot io> ---
gcc is version 10.0.0 git revision e04a052b62e09874b0d61a217a5eb5b6eae5cdc5
CFLAGS=-pipe -march=native -O2 -fno-semantic-interposition -flto -v -save-temps
/usr/libexec/gcc/x86_64-pc-linux-gnu/10.0.0-pre9999/lto1 -march=skylake -mmmx
-mno-3dnow -msse -msse2 -msse3 -mssse3 -mno-sse4a -mcx16 -msahf -mmovbe -maes
-mno-sha -mpclmul -mpopcnt -mabm -mno-lwp -mfma -mno-fma4 -mno-xop -mbmi -msgx
-mbmi2 -mno-pconfig -mno-wbnoinvd -
mno-tbm -mavx -mavx2 -msse4.2 -msse4.1 -mlzcnt -mrtm -mhle -mrdrnd -mf16c
-mfsgsbase -mrdseed -mprfchw -madx -mfxsr -mxsave -mxsaveopt -mno-avx512f
-mno-avx512er -mno-avx512cd -mno-avx512pf -mno-prefetchwt1 -mclflushopt
-mxsavec -mxsaves -mno-avx512dq -mno-avx512bw -mno-avx512vl -mno-avx512ifma
-mno-avx512vbmi -mno-avx5124fmaps -mno-avx5124vnniw -mno-clwb -mno-mw
aitx -mno-clzero -mno-pku -mno-rdpid -mno-gfni -mno-shstk -mno-avx512vbmi2
-mno-avx512vnni -mno-vaes -mno-vpclmulqdq -mno-avx512bitalg -mno-movdiri
-mno-movdir64b -mno-waitpkg -mno-cldemote -mno-ptwrite -mno-avx512bf16
-mno-enqcmd -mno-avx512vp2intersect -quiet -dumpdir ./ -dumpbase
libQt5Gui.so.5.12.5.ltrans12 -mmmx -mno-3dnow -msse -msse2 -msse3 -mssse3
-mno-ss
e4a -mcx16 -msahf -mmovbe -maes -mno-sha -mpclmul -mpopcnt -mabm -mno-lwp -mfma
-mno-fma4 -mno-xop -mbmi -msgx -mbmi2 -mno-pconfig -mno-wbnoinvd -mno-tbm -mavx
-mavx2 -msse4.2 -mlzcnt -mrtm -mhle -mrdrnd -mf16c -mfsgsbase -mrdseed -mprfchw
-madx -mfxsr -mxsave -mxsaveopt -mno-avx512f -mno-avx512er -mno-avx512cd
-mno-avx512pf -mno-prefetchwt1 -mclflushopt -mxsavec
-mxsaves -mno-avx512dq -mno-avx512bw -mno-avx512vl -mno-avx512ifma
-mno-avx512vbmi -mno-avx5124fmaps -mno-avx5124vnniw -mno-clwb -mno-mwaitx
-mno-clzero -mno-pku -mno-rdpid -mno-gfni -mno-shstk -mno-avx512vbmi2
-mno-avx512vnni -mno-vaes -mno-vpclmulqdq -mno-avx512bitalg -mno-movdiri
-mno-movdir64b -mno-waitpkg -mno-cldemote -mno-ptwrite -mno-avx512bf16
-mno-enqc
md -mno-avx512vp2intersect -mtune=skylake -msse4.1 -auxbase-strip
libQt5Gui.so.5.12.5.ltrans12.ltrans.o -O2 -O2 -version -fno-openmp -fno-openacc
-fPIC -fno-semantic-interposition -fuse-ld=gold -fltrans
@/var/tmp/portage/dev-qt/qtgui-5.12.5/temp/ccDJPKT5 -o
libQt5Gui.so.5.12.5.ltrans12.s
GNU GIMPLE (Gentoo 10.0.0_pre9999) version 10.0.0-pre9999 20191023
(experimental) (x86_64-pc-linux-gnu)
compiled by GNU C version 10.0.0-pre9999 20191023 (experimental), GMP
version 6.1.2, MPFR version 4.0.2, MPC version 1.1.0, isl version isl-0.21-GMP
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU GIMPLE (Gentoo 10.0.0_pre9999) version 10.0.0-pre9999 20191023
(experimental) (x86_64-pc-linux-gnu)
compiled by GNU C version 10.0.0-pre9999 20191023 (experimental), GMP
version 6.1.2, MPFR version 4.0.2, MPC version 1.1.0, isl version isl-0.21-GMP
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
during GIMPLE pass: dom
vulkan/qvulkanwindow.cpp: In member function ‘createTransientImage’:
vulkan/qvulkanwindow.cpp:1289:6: internal compiler error: Segmentation fault
1289 | bool QVulkanWindowPrivate::createTransientImage(VkFormat format,
| ^
0x7c0679 crash_signal
/var/tmp/portage/sys-devel/gcc-10.0.0_pre9999/work/gcc-10.0.0_pre9999/gcc/toplev.c:326
0x7f7fdda1770f ???
/var/tmp/portage/sys-libs/glibc-2.30/work/glibc-2.30/signal/../sysdeps/unix/sysv/linux/x86_64/sigaction.c:0
0x11175e1 top_bit_of
/var/tmp/portage/sys-devel/gcc-10.0.0_pre9999/work/gcc-10.0.0_pre9999/gcc/wide-int.cc:423
0x11175e1 wi::sub_large(long*, long const*, unsigned int, long const*, unsigned
int, unsigned int, signop, wi::overflow_type*)
/var/tmp/portage/sys-devel/gcc-10.0.0_pre9999/work/gcc-10.0.0_pre9999/gcc/wide-int.cc:1553
0x122e8f9 wi::binary_traits<generic_wide_int<wide_int_storage>,
generic_wide_int<wide_int_storage>,
wi::int_traits<generic_wide_int<wide_int_storage> >::precision_type,
wi::int_traits<generic_wide_int<wide_int_storage>
>::precision_type>::result_type wi::sub<generic_wide_int<wide_int_storage>,
generic_wide_int<wide_int_storage> >(generic_wide_int<wide_int_storage
> const&, generic_wide_int<wide_int_storage> const&)
/var/tmp/portage/sys-devel/gcc-10.0.0_pre9999/work/gcc-10.0.0_pre9999/gcc/wide-int.h:2537
0x122e8f9 operator_cast::fold_range(tree_node*, value_range_base const&,
value_range_base const&) const
/var/tmp/portage/sys-devel/gcc-10.0.0_pre9999/work/gcc-10.0.0_pre9999/gcc/range-op.cc:1578
0x10d81f8 range_fold_unary_expr(value_range_base*, tree_code, tree_node*,
value_range_base const*, tree_node*)
/var/tmp/portage/sys-devel/gcc-10.0.0_pre9999/work/gcc-10.0.0_pre9999/gcc/tree-vrp.c:1956
0x110c1fd vr_values::extract_range_from_unary_expr(value_range*, tree_code,
tree_node*, tree_node*)
/var/tmp/portage/sys-devel/gcc-10.0.0_pre9999/work/gcc-10.0.0_pre9999/gcc/vr-values.c:934
0x1109287 vr_values::extract_range_from_assignment(value_range*, gassign*)
/var/tmp/portage/sys-devel/gcc-10.0.0_pre9999/work/gcc-10.0.0_pre9999/gcc/vr-values.c:1471
0x1109287 vr_values::vrp_visit_assignment_or_call(gimple*, tree_node**,
value_range*)
/var/tmp/portage/sys-devel/gcc-10.0.0_pre9999/work/gcc-10.0.0_pre9999/gcc/vr-values.c:2090
0x1109287 vr_values::extract_range_from_stmt(gimple*, edge_def**, tree_node**,
value_range*)
/var/tmp/portage/sys-devel/gcc-10.0.0_pre9999/work/gcc-10.0.0_pre9999/gcc/vr-values.c:2822
0x11f2ef3 evrp_range_analyzer::record_ranges_from_stmt(gimple*, bool)
/var/tmp/portage/sys-devel/gcc-10.0.0_pre9999/work/gcc-10.0.0_pre9999/gcc/gimple-ssa-evrp-analyze.c:307
0x10ba6fa record_temporary_equivalences_from_stmts_at_dest
/var/tmp/portage/sys-devel/gcc-10.0.0_pre9999/work/gcc-10.0.0_pre9999/gcc/tree-ssa-threadedge.c:293
0x10b9960 thread_through_normal_block
/var/tmp/portage/sys-devel/gcc-10.0.0_pre9999/work/gcc-10.0.0_pre9999/gcc/tree-ssa-threadedge.c:1062
0x10b8d0d thread_across_edge
/var/tmp/portage/sys-devel/gcc-10.0.0_pre9999/work/gcc-10.0.0_pre9999/gcc/tree-ssa-threadedge.c:1260
0x1026da5 dom_opt_dom_walker::after_dom_children(basic_block_def*)
/var/tmp/portage/sys-devel/gcc-10.0.0_pre9999/work/gcc-10.0.0_pre9999/gcc/tree-ssa-dom.c:1549
0x11e6a81 dom_walker::walk(basic_block_def*)
/var/tmp/portage/sys-devel/gcc-10.0.0_pre9999/work/gcc-10.0.0_pre9999/gcc/domwalk.c:352
0x1021683 execute
/var/tmp/portage/sys-devel/gcc-10.0.0_pre9999/work/gcc-10.0.0_pre9999/gcc/tree-ssa-dom.c:724
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://bugs.gentoo.org/> for instructions.
>From gcc-bugs-return-657329-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 23 13:18:10 2019
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Subject: [Bug tree-optimization/92131] [8/9/10 Regression] incorrect assumption that (ao >= 0) is always false
Date: Wed, 23 Oct 2019 13:18:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92131
--- Comment #23 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Author: ebotcazou
Date: Wed Oct 23 13:17:34 2019
New Revision: 277331
URL: https://gcc.gnu.org/viewcvs?rev=277331&root=gcc&view=rev
Log:
PR tree-optimization/92131
* tree-vrp.c (extract_range_from_plus_minus_expr): If the resulting
range would be symbolic, drop to varying for any explicit overflow
in the constant part or if neither range is a singleton.
Added:
branches/gcc-7-branch/gcc/testsuite/gcc.c-torture/execute/20191023-1.c
- copied unchanged from r277330,
trunk/gcc/testsuite/gcc.c-torture/execute/20191023-1.c
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/testsuite/ChangeLog
branches/gcc-7-branch/gcc/tree-vrp.c
>From gcc-bugs-return-657330-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 23 13:19:44 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/92131] [8/9/10 Regression] incorrect assumption that (ao >= 0) is always false
Date: Wed, 23 Oct 2019 13:19:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92131
Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Version|9.1.0 |8.3.0
Resolution|--- |FIXED
--- Comment #24 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Thanks for reporting the problem.
>From gcc-bugs-return-657331-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 23 13:22:57 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/92195] New: [7/8 Regression/Latent] 'libgomp.c/pr90811.c:29:1: error: address taken, but ADDRESSABLE bit not set' ('internal compiler error: verify_gimple failed')
Date: Wed, 23 Oct 2019 13:22:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92195
Bug ID: 92195
Summary: [7/8 Regression/Latent] 'libgomp.c/pr90811.c:29:1:
error: address taken, but ADDRESSABLE bit not set'
('internal compiler error: verify_gimple failed')
Product: gcc
Version: unknown
Status: UNCONFIRMED
Keywords: ice-checking, openmp
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: tschwinge at gcc dot gnu.org
CC: amonakov at gcc dot gnu.org, jakub at gcc dot gnu.org
Target Milestone: ---
With '--enable-checking=yes,extra,rtl', I see the test case from PR90811 in
gcc-8-branch (cherry-picked in r272163), and gcc-7-branch (cherry-picked in
r275155) run into an ICE in the host (not offload!) compiler (so this must be a
latent issue, not related to the 'gcc/config/nvptx/nvptx.c' code changes):
source-gcc/libgomp/testsuite/libgomp.c/pr90811.c: In function
'main._omp_fn.1':
source-gcc/libgomp/testsuite/libgomp.c/pr90811.c:29:1: error: address
taken, but ADDRESSABLE bit not set
}
^
D.2317
cc1: note: in statement
# .MEM_65 = VDEF <.MEM_20(D)>
simduid.7_66 = GOMP_SIMT_ENTER (simduid.7_64(D), &D.2317);
Breakpoint 2, internal_error (gmsgid=0x19f03d5 "verify_gimple failed") at
[...]/source-gcc/gcc/diagnostic.c:1438
1438 {
(gdb) bt
#0 internal_error (gmsgid=0x19f03d5 "verify_gimple failed") at
[...]/source-gcc/gcc/diagnostic.c:1438
#1 0x0000000000d9b389 in verify_gimple_in_cfg (fn=0x7ffff690e160,
verify_nothrow=true) at [...]/source-gcc/gcc/tree-cfg.c:5585
#2 0x0000000000c1b8b8 in execute_function_todo (fn=0x7ffff690e160,
data=<optimized out>) at [...]/source-gcc/gcc/passes.c:1994
#3 0x0000000000c1c22a in execute_todo (flags=2099296) at
[...]/source-gcc/gcc/passes.c:2048
#4 0x0000000000c1ef5e in execute_one_pass (pass=pass@entry=<opt_pass*
0x25f2490 "ccp"(37)>) at [...]/source-gcc/gcc/passes.c:2537
#5 0x0000000000c1f558 in execute_pass_list_1 (pass=<opt_pass* 0x25f2490
"ccp"(37)>) at [...]/source-gcc/gcc/passes.c:2586
#6 0x0000000000c1f56a in execute_pass_list_1 (pass=<opt_pass* 0x25f2360
"early_optimizations"(35)>) at [...]/source-gcc/gcc/passes.c:2587
#7 0x0000000000c1f5b5 in execute_pass_list (fn=<optimized out>,
pass=<optimized out>) at [...]/source-gcc/gcc/passes.c:2597
#8 0x0000000000c1d8c9 in do_per_function_toporder
(callback=callback@entry=0xc1f5a0 <execute_pass_list(function*, opt_pass*)>,
data=0x25f21e0) at [...]/source-gcc/gcc/passes.c:1739
#9 0x0000000000c1fc17 in execute_ipa_pass_list (pass=<opt_pass* 0x25f2180
"opt_local_passes"(31)>) at [...]/source-gcc/gcc/passes.c:2939
#10 0x0000000000885d5f in ipa_passes () at
[...]/source-gcc/gcc/cgraphunit.c:2423
#11 symbol_table::compile (this=this@entry=0x7ffff67ac100) at
[...]/source-gcc/gcc/cgraphunit.c:2558
#12 0x000000000088839e in symbol_table::compile (this=0x7ffff67ac100) at
[...]/source-gcc/gcc/cgraphunit.c:2537
#13 symbol_table::finalize_compilation_unit (this=0x7ffff67ac100) at
[...]/source-gcc/gcc/cgraphunit.c:2717
#14 0x0000000000d477a2 in compile_file () at
[...]/source-gcc/gcc/toplev.c:480
#15 0x00000000006c96ca in do_compile () at
[...]/source-gcc/gcc/toplev.c:2160
#16 toplev::main (this=this@entry=0x7fffffffc450, argc=argc@entry=33,
argv=argv@entry=0x7fffffffc558) at [...]/source-gcc/gcc/toplev.c:2295
#17 0x00000000006cbf47 in main (argc=33, argv=0x7fffffffc558) at
[...]/source-gcc/gcc/main.c:39
There is no ICE when compiling with '-foffload=disable'.
This ICE is not seen on trunk, and gcc-9-branch (cherry-picked in r272162).
>From gcc-bugs-return-657332-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 23 13:27:43 2019
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From: "mark.eggleston at codethink dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/92196] New: Regression: -fno-automatic affects local variables in subroutines/function declared with recursive keyword
Date: Wed, 23 Oct 2019 13:27:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92196
Bug ID: 92196
Summary: Regression: -fno-automatic affects local variables in
subroutines/function declared with recursive keyword
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Reporter: mark.eggleston at codethink dot com
Target Milestone: ---
I've noticed a change in behaviour regarding the use of -fno-automatic and
recursive subroutines and functions. This was the result of a contrived
recursive test routine formerly made recursive via -frecursive being converted
to use the recursive keyword instead of relying on -frecursive.
Local variables in a recursive subroutine or function (declared as such in
code) with default attributes are treated as though they have the automatic
attribute and are allocated on the stack. For the 7 and 8 branch compilers
using -fno-automatic has no affect on these local variables, for the 9 branch
and trunk compilers these local variables are treated as having the save
attribute and are not allocated on the stack.
The following test subroutine, declared recursive, even though it is not,
demonstrates the issue:
recursive subroutine foo
integer :: a
a = 5
if (a.ne.5) stop 1
end subroutine
Compiled using -fdump-tree-original with and without -fno-automatic the output
is identical for 7 and 8 branch compilers.
foo ()
{
integer(kind=4) a;
a = 5;
if (a != 5)
{
_gfortran_stop_numeric (1, 0);
}
L.1:;
}
For the 9 branch and trunk compilers the output is the same without
-fno-automatic but with the output is:
foo ()
{
static integer(kind=4) a;
a = 5;
if (a != 5)
{
_gfortran_stop_numeric (1, 0);
}
L.1:;
}
Showing that a is treated as having the save attribute.
I've tracked this down to
https://gcc.gnu.org/viewcvs/gcc?view=revision&revision=268098.
>From gcc-bugs-return-657333-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 23 13:29:26 2019
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Subject: [Bug middle-end/92195] [7/8 Regression/Latent] 'libgomp.c/pr90811.c:29:1: error: address taken, but ADDRESSABLE bit not set' ('internal compiler error: verify_gimple failed')
Date: Wed, 23 Oct 2019 13:29:00 -0000
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--- Comment #1 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
Cherry-picking the PR90811 follow-up r272181 does not fix this.
>From gcc-bugs-return-657334-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 23 13:44:23 2019
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/92195] [7/8 Regression/Latent] 'libgomp.c/pr90811.c:29:1: error: address taken, but ADDRESSABLE bit not set' ('internal compiler error: verify_gimple failed')
Date: Wed, 23 Oct 2019 13:44:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92195
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Version|unknown |8.3.1
Target Milestone|--- |7.5
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
You could try to bisect what fixed the ICE.
>From gcc-bugs-return-657335-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 23 13:47:05 2019
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From: "LouisJenkinsCS at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/92197] New: String Concatenation, Commutativity, and Side-Effect Inducing Functions
Date: Wed, 23 Oct 2019 13:47:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92197
Bug ID: 92197
Summary: String Concatenation, Commutativity, and Side-Effect
Inducing Functions
Product: gcc
Version: 9.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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In GCC version 9.2.1 (and some previous versions as far back as 7.4.0), this
program results in different behavior than what is expected...
```cpp
#include <string>
#include <iostream>
char n = '0';
std::string g(void) {
n++;
return std::string("g") + n;
}
std::string f(void) {
n++;
return std::string("f") + n;
}
int main(void) {
std::string temp = "";
temp += "(" + g() + "," + f() + ")";
std::cout << temp << std::endl;
}
```
In GCC, it produces `(g2,f1)`, which implies that `g()` was called before
`f()`; in Clang version 8.0.0 _and_ 10.0.1, it produces the desired output of
`(g1,f2)`. This subtle bug can result in some _very_ bad behavior; for context,
I am a TA in a class and a student's submission just looped infinitely without
any reasonable cause. The assignment was on implementing a recursive descent
parser, and the student used a global variable similar to what can be seen
here, and it resulted in it resolving this rule out of order...
SL -> S, SL
Where it originally was to call 'S' and then 'SL', it instead calls 'SL' (which
infinitely recurses) and then 'S'. I'm assuming this is not an intended effect.
>From gcc-bugs-return-657336-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 23 13:53:56 2019
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/88335] Implement P1073R3, C++20 immediate functions (consteval).
Date: Wed, 23 Oct 2019 13:53:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #47032|0 |1
is obsolete| |
Attachment #47042|0 |1
is obsolete| |
--- Comment #12 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 47094
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47094&action=edit
gcc10-pr88335.patch
Just for the record, this is a variant of the patch that has testsuite coverage
for immediate function calls in discarded statements (at least how I believe it
should work), still using the cxx_eval_consteval rather than using again
build_cxx_call.
>From gcc-bugs-return-657337-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 23 14:05:06 2019
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From: "gccbugbjorn at fahller dot se" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/92198] New: error "different exception specifier" with forward referring noexcept condition
Date: Wed, 23 Oct 2019 14:05:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92198
Bug ID: 92198
Summary: error "different exception specifier" with forward
referring noexcept condition
Product: gcc
Version: 9.2.1
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Created attachment 47095
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47095&action=edit
Failing test program
The below code fails to compile:
bjorn@TS-PC11H6ST:/tmp$ cat t.cpp
template <typename T>
class C
{
public:
C(const C& e) noexcept( noexcept(T(e.value())) );
T& value() & noexcept; // move above copy-ctor to make code compile
};
template <typename T>
C<T>::C(const C& e) noexcept( noexcept(T(e.value())) )
{
}
bjorn@TS-PC11H6ST:/tmp$ g++-9 t.cpp
t.cpp:11:1: error: declaration of ‘C<T>::C(const C<T>&) noexcept (noexcept
((T)(e.C<T>::value())))’ has a different exception specifier
11 | C<T>::C(const C& e) noexcept( noexcept(T(e.value())) )
| ^~~~
t.cpp:6:5: note: from previous declaration ‘C<T>::C(const C<T>&) noexcept
(noexcept ((T)(e.value())))’
6 | C(const C& e) noexcept( noexcept(T(e.value())) );
| ^
bjorn@TS-PC11H6ST:/tmp$ g++-9 --version
g++-9 (Ubuntu 9.2.1-9ubuntu2~18.04.1) 9.2.1 20191008
Copyright (C) 2019 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.
Obligatory godbolt link : https://godbolt.org/z/uB44Oo
>From gcc-bugs-return-657338-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 23 14:35:39 2019
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/92194] maybe-uninitialized false positive with c++2a
Date: Wed, 23 Oct 2019 14:35:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |msebor at gcc dot gnu.org
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Possible duplicate of pr80635.
>From gcc-bugs-return-657339-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 23 14:36:23 2019
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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/92198] error "different exception specifier" with forward referring noexcept condition
Date: Wed, 23 Oct 2019 14:36:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |mpolacek at gcc dot gnu.org
Resolution|--- |FIXED
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed by r272586 so fixed in GCC 10. Certainly not backportable.
>From gcc-bugs-return-657340-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 23 14:46:01 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 ipa/92074] [10 regression] 26% performance regression on Spec2017 548.exchange2_r
Date: Wed, 23 Oct 2019 14:46:00 -0000
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--- Comment #6 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Author: hubicka
Date: Wed Oct 23 14:45:24 2019
New Revision: 277333
URL: https://gcc.gnu.org/viewcvs?rev=277333&root=gcc&view=rev
Log:
PR ipa/92074
* params.def (inline-heuristics-hint-percent): Set to 600.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/params.def
>From gcc-bugs-return-657341-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 23 15:01:00 2019
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From: "nsz at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/91886] [10 regression] powerpc64 impossible constraint in asm
Date: Wed, 23 Oct 2019 15:01:00 -0000
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--- Comment #1 from nsz at gcc dot gnu.org ---
seems to be broken since r271916
>From gcc-bugs-return-657342-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 23 15:02:43 2019
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Subject: [Bug c/92167] Poor source location choice for diagnostic in macro expansion
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--- Comment #1 from Andrew Church <achurch+gcc at achurch dot org> ---
A similar problem occurs when passing the wrong number of arguments to a
function which has been renamed with a macro -- the diagnostic is associated
with the renaming macro instead of the original source line:
-----------------------------
$ cat test3.c
#define RENAME(x) foo_##x
#define a RENAME(a)
extern int a(int);
int b(void) {return a();}
$ gcc-9.2.0 -c test3.c
test.c: In function 'b':
test.c:1:19: error: too few arguments to function 'foo_a'
1 | #define RENAME(x) foo_##x
| ^~~~
test.c:2:11: note: in expansion of macro 'RENAME'
2 | #define a RENAME(a)
| ^~~~~~
test.c:4:21: note: in expansion of macro 'a'
4 | int b(void) {return a();}
| ^
test.c:1:19: note: declared here
1 | #define RENAME(x) foo_##x
| ^~~~
test.c:2:11: note: in expansion of macro 'RENAME'
2 | #define a RENAME(a)
| ^~~~~~
test.c:3:12: note: in expansion of macro 'a'
3 | extern int a(int);
| ^
-----------------------------
In this case as well, Clang associates the diagnostic with the original source
line, though in this case it does not show the macro chain:
-----------------------------
$ clang-9 -c test3.c
test.c:4:23: error: too few arguments to function call, expected 1, have 0
int b(void) {return a();}
~ ^
test.c:3:1: note: 'foo_a' declared here
extern int a(int);
^
-----------------------------
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Subject: [Bug c++/92194] maybe-uninitialized false positive with c++2a
Date: Wed, 23 Oct 2019 15:12:00 -0000
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--- Comment #2 from Marc Glisse <glisse at gcc dot gnu.org> ---
With -Wsystem-headers you also get the warning in C++17 (and it is actually a
bit more informative, at least it says where it is used).
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Subject: [Bug c++/92197] String Concatenation, Commutativity, and Side-Effect Inducing Functions
Date: Wed, 23 Oct 2019 15:23:00 -0000
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--- Comment #1 from Louis Jenkins <LouisJenkinsCS at hotmail dot com> ---
Can confirm that on Godbolt, this bug occurs _only_ with GCC, not with clang,
nor icc, or ellcc. This bug has occurred since GCC version 4.7.3, presumably is
still occurring in GCC version 10.0 (or whatever the 'trunk' is pointing to on
Godbolt)/
https://godbolt.org/z/gufFjj
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Subject: [Bug target/91886] [10 regression] powerpc64 impossible constraint in asm
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--- Comment #2 from nsz at gcc dot gnu.org ---
note that "ws" is now supported by clang, but "wa" is not.
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Subject: [Bug testsuite/92199] New: [10 regression] g++.old-deja/g++.robertl/eb133b.C fails after r277300
Date: Wed, 23 Oct 2019 16:07:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92199
Bug ID: 92199
Summary: [10 regression] g++.old-deja/g++.robertl/eb133b.C
fails after r277300
Product: gcc
Version: 10.0
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Did you perhaps miss updating this test case for these changes?
spawn -ignore SIGHUP
/home/seurer/gcc/build/gcc-test2/gcc/testsuite/g++/../../xg++
-B/home/seurer/gcc/build/gcc-test2/gcc/testsuite/g++/../../
-fno-diagnostics-show-caret -fno-diagnostics-show-line-numbers
-fdiagnostics-color=never -fdiagnostics-urls=never -nostdinc++
-I/home/seurer/gcc/build/gcc-test2/powerpc64-unknown-linux-gnu/libstdc++-v3/include/powerpc64-unknown-linux-gnu
-I/home/seurer/gcc/build/gcc-test2/powerpc64-unknown-linux-gnu/libstdc++-v3/include
-I/home/seurer/gcc/gcc-test2/libstdc++-v3/libsupc++
-I/home/seurer/gcc/gcc-test2/libstdc++-v3/include/backward
-I/home/seurer/gcc/gcc-test2/libstdc++-v3/testsuite/util -fmessage-length=0
-std=gnu++2a -Wall -Wno-deprecated -c -o eb130.o
/home/seurer/gcc/gcc-test2/gcc/testsuite/g++.old-deja/g++.robertl/eb130.C
In file included from
/home/seurer/gcc/build/gcc-test2/powerpc64-unknown-linux-gnu/libstdc++-v3/include/backward/hash_set:64,
from
/home/seurer/gcc/gcc-test2/gcc/testsuite/g++.old-deja/g++.robertl/eb130.C:9:
/home/seurer/gcc/build/gcc-test2/powerpc64-unknown-linux-gnu/libstdc++-v3/include/backward/hashtable.h:
In instantiation of 'class __gnu_cxx::hashtable<int, int, __gnu_cxx::hash<int>,
std::_Identity<int>, std::equal_to<int>, std::allocator<int> >':
/home/seurer/gcc/build/gcc-test2/powerpc64-unknown-linux-gnu/libstdc++-v3/include/backward/hash_set:94:11:
required from 'class __gnu_cxx::hash_set<int>'
/home/seurer/gcc/gcc-test2/gcc/testsuite/g++.old-deja/g++.robertl/eb130.C:10:26:
required from here
/home/seurer/gcc/build/gcc-test2/powerpc64-unknown-linux-gnu/libstdc++-v3/include/backward/hashtable.h:283:67:
error: no class template named 'rebind' in 'class std::allocator<int>'
/home/seurer/gcc/build/gcc-test2/powerpc64-unknown-linux-gnu/libstdc++-v3/include/backward/hashtable.h:289:62:
error: no class template named 'rebind' in 'class std::allocator<int>'
/home/seurer/gcc/build/gcc-test2/powerpc64-unknown-linux-gnu/libstdc++-v3/include/backward/hashtable.h:290:63:
error: no class template named 'rebind' in 'class std::allocator<int>'
/home/seurer/gcc/build/gcc-test2/powerpc64-unknown-linux-gnu/libstdc++-v3/include/backward/hashtable.h:291:51:
error: no class template named 'rebind' in 'class std::allocator<int>'
In file included from
/home/seurer/gcc/gcc-test2/gcc/testsuite/g++.old-deja/g++.robertl/eb130.C:9:
/home/seurer/gcc/build/gcc-test2/powerpc64-unknown-linux-gnu/libstdc++-v3/include/backward/hash_set:
In instantiation of 'class __gnu_cxx::hash_set<int>':
/home/seurer/gcc/gcc-test2/gcc/testsuite/g++.old-deja/g++.robertl/eb130.C:10:26:
required from here
/home/seurer/gcc/build/gcc-test2/powerpc64-unknown-linux-gnu/libstdc++-v3/include/backward/hash_set:104:40:
error: no type named 'pointer' in 'class std::allocator<int>'
/home/seurer/gcc/build/gcc-test2/powerpc64-unknown-linux-gnu/libstdc++-v3/include/backward/hash_set:105:46:
error: no type named 'const_pointer' in 'class std::allocator<int>'
/home/seurer/gcc/build/gcc-test2/powerpc64-unknown-linux-gnu/libstdc++-v3/include/backward/hash_set:106:42:
error: no type named 'reference' in 'class std::allocator<int>'
/home/seurer/gcc/build/gcc-test2/powerpc64-unknown-linux-gnu/libstdc++-v3/include/backward/hash_set:107:48:
error: no type named 'const_reference' in 'class std::allocator<int>'
In file included from
/home/seurer/gcc/build/gcc-test2/powerpc64-unknown-linux-gnu/libstdc++-v3/include/backward/hash_set:64,
from
/home/seurer/gcc/gcc-test2/gcc/testsuite/g++.old-deja/g++.robertl/eb130.C:9:
/home/seurer/gcc/build/gcc-test2/powerpc64-unknown-linux-gnu/libstdc++-v3/include/backward/hashtable.h:
In instantiation of 'void __gnu_cxx::hashtable<_Val, _Key, _HashFcn,
_ExtractKey, _EqualKey, _Alloc>::clear() [with _Val = int; _Key = int; _HashFcn
= __gnu_cxx::hash<int>; _ExtractKey = std::_Identity<int>; _EqualKey =
std::equal_to<int>; _Alloc = std::allocator<int>]':
/home/seurer/gcc/build/gcc-test2/powerpc64-unknown-linux-gnu/libstdc++-v3/include/backward/hashtable.h:361:9:
required from '__gnu_cxx::hashtable<_Val, _Key, _HashFcn, _ExtractKey,
_EqualKey, _Alloc>::~hashtable() [with _Val = int; _Key = int; _HashFcn =
__gnu_cxx::hash<int>; _ExtractKey = std::_Identity<int>; _EqualKey =
std::equal_to<int>; _Alloc = std::allocator<int>]'
/home/seurer/gcc/build/gcc-test2/powerpc64-unknown-linux-gnu/libstdc++-v3/include/backward/hash_set:127:59:
required from '__gnu_cxx::hash_set<_Value, _HashFcn, _EqualKey,
_Alloc>::hash_set() [with _Value = int; _HashFcn = __gnu_cxx::hash<int>;
_EqualKey = std::equal_to<int>; _Alloc = std::allocator<int>]'
/home/seurer/gcc/gcc-test2/gcc/testsuite/g++.old-deja/g++.robertl/eb130.C:10:26:
required from here
/home/seurer/gcc/build/gcc-test2/powerpc64-unknown-linux-gnu/libstdc++-v3/include/backward/hashtable.h:1106:37:
error: using invalid field '__gnu_cxx::hashtable<_Val, _Key, _HashFcn,
_ExtractKey, _EqualKey, _Alloc>::_M_buckets'
/home/seurer/gcc/build/gcc-test2/powerpc64-unknown-linux-gnu/libstdc++-v3/include/backward/hashtable.h:1108:19:
error: using invalid field '__gnu_cxx::hashtable<_Val, _Key, _HashFcn,
_ExtractKey, _EqualKey, _Alloc>::_M_buckets'
/home/seurer/gcc/build/gcc-test2/powerpc64-unknown-linux-gnu/libstdc++-v3/include/backward/hashtable.h:1115:4:
error: using invalid field '__gnu_cxx::hashtable<_Val, _Key, _HashFcn,
_ExtractKey, _EqualKey, _Alloc>::_M_buckets'
compiler exited with status 1
FAIL: g++.old-deja/g++.robertl/eb130.C -std=gnu++2a (test for excess errors)
Excess errors:
/home/seurer/gcc/build/gcc-test2/powerpc64-unknown-linux-gnu/libstdc++-v3/include/backward/hashtable.h:283:67:
error: no class template named 'rebind' in 'class std::allocator<int>'
/home/seurer/gcc/build/gcc-test2/powerpc64-unknown-linux-gnu/libstdc++-v3/include/backward/hashtable.h:289:62:
error: no class template named 'rebind' in 'class std::allocator<int>'
/home/seurer/gcc/build/gcc-test2/powerpc64-unknown-linux-gnu/libstdc++-v3/include/backward/hashtable.h:290:63:
error: no class template named 'rebind' in 'class std::allocator<int>'
/home/seurer/gcc/build/gcc-test2/powerpc64-unknown-linux-gnu/libstdc++-v3/include/backward/hashtable.h:291:51:
error: no class template named 'rebind' in 'class std::allocator<int>'
/home/seurer/gcc/build/gcc-test2/powerpc64-unknown-linux-gnu/libstdc++-v3/include/backward/hash_set:104:40:
error: no type named 'pointer' in 'class std::allocator<int>'
/home/seurer/gcc/build/gcc-test2/powerpc64-unknown-linux-gnu/libstdc++-v3/include/backward/hash_set:105:46:
error: no type named 'const_pointer' in 'class std::allocator<int>'
/home/seurer/gcc/build/gcc-test2/powerpc64-unknown-linux-gnu/libstdc++-v3/include/backward/hash_set:106:42:
error: no type named 'reference' in 'class std::allocator<int>'
/home/seurer/gcc/build/gcc-test2/powerpc64-unknown-linux-gnu/libstdc++-v3/include/backward/hash_set:107:48:
error: no type named 'const_reference' in 'class std::allocator<int>'
/home/seurer/gcc/build/gcc-test2/powerpc64-unknown-linux-gnu/libstdc++-v3/include/backward/hashtable.h:1106:37:
error: using invalid field '__gnu_cxx::hashtable<_Val, _Key, _HashFcn,
_ExtractKey, _EqualKey, _Alloc>::_M_buckets'
/home/seurer/gcc/build/gcc-test2/powerpc64-unknown-linux-gnu/libstdc++-v3/include/backward/hashtable.h:1108:19:
error: using invalid field '__gnu_cxx::hashtable<_Val, _Key, _HashFcn,
_ExtractKey, _EqualKey, _Alloc>::_M_buckets'
/home/seurer/gcc/build/gcc-test2/powerpc64-unknown-linux-gnu/libstdc++-v3/include/backward/hashtable.h:1115:4:
error: using invalid field '__gnu_cxx::hashtable<_Val, _Key, _HashFcn,
_ExtractKey, _EqualKey, _Alloc>::_M_buckets'
testcase /home/seurer/gcc/gcc-test2/gcc/testsuite/g++.old-deja/old-deja.exp
completed in 3 seconds
=== g++ Summary ===
# of expected passes 3
# of unexpected failures 1
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug testsuite/92199] [10 regression] g++.old-deja/g++.robertl/eb133b.C fails after r277300
Date: Wed, 23 Oct 2019 16:14:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92199
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
It's not the testcase, it's the old hash_map code that needs a fix.
It should be OK at r277335
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/92197] String Concatenation, Commutativity, and Side-Effect Inducing Functions
Date: Wed, 23 Oct 2019 16:17:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92197
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
Summary|String Concatenation and |String Concatenation,
|Side-Effect Inducing |Commutativity, and
|Functions |Side-Effect Inducing
| |Functions
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
In c++ (before c++17 were the rules changed), the order of evulatating function
calls and the operator+ is not defined by the standard.
Only , (in a non argument form) causes a sequence point inside an expression
and even then you could have ordering issues still.
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From: "sethml at ofb dot net" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/92172] ARM Thumb2 frame pointers inconsistent with clang
Date: Wed, 23 Oct 2019 16:26:00 -0000
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--- Comment #5 from Seth LaForge <sethml at ofb dot net> ---
Richard:
> No it doesn't. The AAPCS for AArch32 makes no reference to a frame pointer,
> so there is no portable way defined for walking a frame other than by using
> dwarf records or C++ unwinding descriptions. The latter are preferred, but
> only support unwinding from 'synchronous' unwind points (after the prologue
> and before the epilogue).
...in other words, neither is suitable for generating stack traces in an
embedded context, which is a genuinely useful feature.
You're right, AAPCS does not mention frame pointers. ATPCS does - I'm not sure
if it's still normative. However, it says the thumb frame pointer is any of
r4-r7, and dictates a frame pointer even *higher* on the stack - just above the
saved LR. That's not what any compiler I know of does.
At this point it's entirely an argument from consistency:
- GCC ARM and Clang ARM use R11 for frame pointer, pointing to the stacked R11.
Useful.
- Clang Thumb uses R7 for frame pointer, pointing to the stacked R7. Useful.
- GCC Thumb uses R7 for the frame pointer, pointing to an arbitrary location.
Useless for stack traces.
Stack traces are a genuinely useful thing. Many language runtimes do them
automatically all the time (e.g. Python). Many C/C++ development environments
do them automatically on a crash, either via a debugger or something like
libunwind. Many embedded devices would like to do them on a crash - they often
have very little storage to store debugging information and relay it to some
server, and something like libunwind is just too much for them.
> Compilers are, of course, free to use frame pointers internally, within a frame,
> but there is no frame chain that can be walked.
With clang, there is. With GCC and ARM mode, there is. I'm promoting making
thumb mode work the same as ARM mode, thus making stack tracing possible.
Wilco:
> On GCC10 the codesize overhead of -fno-omit-frame-pointer is 4.1% for Arm and 4.8%
> for Thumb-2 (measured on SPEC2006). That's already a large overhead, especially
> since this feature doesn't do anything useful besides adding overhead...
Well, that's basically my point: as implemented, gcc frame pointers are useless
on Thumb. There's no reason to enable them. With a small adjustment to behave
the same as clang they are quite useful: software can create stack traces
easily. Adding a small amount of overhead to a useless feature in order to make
it useful seems like a very worthwhile tradeoff to me.
> The key is that GCC uses the frame pointer for every stack access, and thus the
> placement of the frame pointer within a frame matters.
It does? Why?!? The SP register is a better register to offset from in every
case I can think of that doesn't involve alloca() or variable-size-arrays,
which should be rare. Clang, when using frame pointers, uses SP to access local
variables in most cases - compare the implementation of AccessLocal():
https://godbolt.org/z/3o4TlD
int AccessLocal(int a) {
volatile int b = a;
SimpleLeaf();
return b;
}
GCC 8:
push {r7, lr}
sub sp, sp, #8
add r7, sp, #0
str r0, [r7, #4]
...
Clang 9:
push {r7, lr}
mov r7, sp
sub sp, #8
str r0, [sp, #4]
...
Same numer of instructions, same code size, same performance, but the clang
version has an unwindable/traceable frame pointer.
> Thanks for posting actual numbers, but GCC 4.7?!? It might be time to try GCC9...
There are, sadly, compelling historical reasons. We're putting our effort into
moving to clang instead.
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From: "vanshil.sh at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/92200] New: Shared pointer not destroyed
Date: Wed, 23 Oct 2019 17:21:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92200
Bug ID: 92200
Summary: Shared pointer not destroyed
Product: gcc
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gcc -v output:
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/7/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu
7.4.0-1ubuntu1~18.04.1' --with-bugurl=file:///usr/share/doc/gcc-7/README.Bugs
--enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr
--with-gcc-major-version-only --program-suffix=-7
--program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --enable-default-pie
--with-system-zlib --with-target-system-zlib --enable-objc-gc=auto
--enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64
--with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic
--enable-offload-targets=nvptx-none --without-cuda-driver
--enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=x86_64-linux-gnu
Thread model: posix
gcc version 7.4.0 (Ubuntu 7.4.0-1ubuntu1~18.04.1)
Command to build program: g++ shared_ptr_test.cc -pthread
Compiles with no errors/warnings
Bug: in shared_ptr_test, in the `othertf` function, I create 2 different shared
pointers to class A. The first one runs an asynchronous computation inside of
class A using std::async and the second one runs the same asynchronous
computation using std::thread. The argument passed to both std::async and
std::thread is a shared_ptr generated using `shared_from_this().` In the
std::thread case, the instance of class A is properly de-refed and destroyed,
but in the std::async case, the instance is not destroyed.
I have run this program with g++ 9.x with the same results.
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Subject: [Bug libstdc++/92200] Shared pointer not destroyed
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--- Comment #1 from Vanshil Shah <vanshil.sh at gmail dot com> ---
Created attachment 47096
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47096&action=edit
preprocessed file that triggers the bug
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/91369] Implement P0784R7: constexpr new
Date: Wed, 23 Oct 2019 17:42:00 -0000
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--- Comment #18 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Wed Oct 23 17:42:11 2019
New Revision: 277342
URL: https://gcc.gnu.org/viewcvs?rev=277342&root=gcc&view=rev
Log:
PR c++/91369 Implement P0784R7 changes to allocation and construction
This patch is the first part of library support for constexpr
std::vector and std::string. This only includes the changes to
std::allocator, std::allocator_traits, std::construct_at,
std::destroy_at, std::destroy and std::destroy_n.
std::allocator::allocate and std::allocator::deallocate need to be
added so that they can be intercepted by the compiler during constant
evaluation. Outside of constant evaluation those new member functions
just forward to the existing implementation in the base class.
PR c++/91369 Implement P0784R7 changes to allocation and construction
* include/bits/alloc_traits.h: Include <bits/stl_construct.h>.
(allocator_traits::_S_allocate, allocator_traits::_S_construct)
(allocator_traits::_S_destroy, allocator_traits::_S_max_size)
(allocator_traits::_S_select, allocator_traits::allocate)
(allocator_traits::deallocate, allocator_traits::construct)
(allocator_traits::destroy, allocator_traits::max_size)
(allocator_traits::select_on_container_copy_construction)
(allocator_traits<allocator<T>>): Add constexpr specifier for C++20.
(allocator_traits<allocator<T>>::construct): Use construct_at.
(allocator_traits<allocator<T>>::destroy): Use destroy_at.
(__alloc_on_copy, __alloc_on_move, __alloc_on_swap): Add constexpr
specifier.
(_Destroy(ForwardIterator, ForwardIterator, Alloc&))
(_Destroy(ForwardIterator, ForwardIterator, allocator<T>&)): Move here
from <bits/stl_construct.h>.
* include/bits/allocator.h (allocator::~allocator): Remove for C++20.
(allocator::allocate, allocate::deallocate): Define for C++20 and up.
(operator==, operator!=): Add constexpr specifier for C++20.
* include/bits/stl_construct.h: Don't include <ext/alloc_traits.h>.
(destroy_at): For C++20 add constexpr specifier and support for
destroying arrays.
(construct_at): Define new function for C++20.
(_Construct): Return result of placement new-expression. For C++11 and
up add constexpr. For C++20 dispatch to std::construct_at during
constant evaluation.
(_Destroy(pointer)): Add constexpr specifier. For C++20 dispatch to
std::destroy_at during constant evaluation.
(_Destroy_aux::__destroy, _Destroy_n_aux::__destroy_n): Add constexpr
specifier for C++20.
(_Destroy(ForwardIterator, ForwardIterator))
(_Destroy(ForwardIterator, Size)): Likewise. Do not elide trivial
destructors during constant evaluation.
(destroy, destroy_n): Add constexpr specifier for C++20.
(_Destroy(ForwardIterator, ForwardIterator, Alloc&))
(_Destroy(ForwardIterator, ForwardIterator, allocator<T>&)): Move to
<bits/alloc_traits.h>, to remove dependency on allocators.
* include/bits/stl_uninitialized.h: Include <ext/alloc_traits.h>.
Include <bits/stl_pair.h> instead of <utility>.
* include/ext/alloc_traits.h: Always include <bits/alloc_traits.h>.
(__alloc_traits::construct, __alloc_traits::destroy)
(__alloc_traits::_S_select_on_copy, __alloc_traits::_S_on_swap): Add
constexpr specifier.
* include/ext/malloc_allocator.h (operator==, operator!=): Add
constexpr specifier for C++20.
* include/ext/new_allocator.h (operator==, operator!=): Likewise.
* testsuite/20_util/headers/memory/synopsis.cc: Add constexpr.
* testsuite/20_util/scoped_allocator/69293_neg.cc: Ignore additional
errors due to constexpr function called after failed static_assert.
* testsuite/20_util/specialized_algorithms/construct_at/1.cc: New test.
* testsuite/23_containers/vector/cons/destructible_debug_neg.cc:
Ignore additional errors due to constexpr function called after failed
static_assert.
* testsuite/23_containers/vector/cons/destructible_neg.cc: Likewise.
Added:
trunk/libstdc++-v3/testsuite/20_util/specialized_algorithms/construct_at/
trunk/libstdc++-v3/testsuite/20_util/specialized_algorithms/construct_at/1.cc
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/bits/alloc_traits.h
trunk/libstdc++-v3/include/bits/allocator.h
trunk/libstdc++-v3/include/bits/stl_construct.h
trunk/libstdc++-v3/include/bits/stl_uninitialized.h
trunk/libstdc++-v3/include/ext/alloc_traits.h
trunk/libstdc++-v3/include/ext/malloc_allocator.h
trunk/libstdc++-v3/include/ext/new_allocator.h
trunk/libstdc++-v3/testsuite/20_util/headers/memory/synopsis.cc
trunk/libstdc++-v3/testsuite/20_util/scoped_allocator/69293_neg.cc
trunk/libstdc++-v3/testsuite/23_containers/vector/cons/destructible_debug_neg.cc
trunk/libstdc++-v3/testsuite/23_containers/vector/cons/destructible_neg.cc
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--- Comment #6 from Wilco <wilco at gcc dot gnu.org> ---
(In reply to Seth LaForge from comment #5)
> GCC 8:
> push {r7, lr}
> sub sp, sp, #8
> add r7, sp, #0
> str r0, [r7, #4]
> ...
>
> Clang 9:
> push {r7, lr}
> mov r7, sp
> sub sp, #8
> str r0, [sp, #4]
> ...
Crazy yes, but it's due to historical reasons. Originally GCC could only emit
code using a frame pointer. Later the frame pointer could be switched off
(hence -fomit-frame-pointer), but you still needed it for debug tables. Then
there was Dwarf which didn't need a frame pointer anymore. And today the frame
pointer is off by default globally in GCC.
> - GCC ARM and Clang ARM use R11 for frame pointer, pointing to the stacked R11. Useful.
Well Clang does this:
push {r4, r10, r11, lr}
add r11, sp, #8
but GCC does something different:
push {r4, r5, fp, lr}
add fp, sp, #12
Ie. FP points to saved LR with GCC but saved FP with Clang, so it's not
possible for a generic unwinder to follow the chain, even ignoring Arm/Thumb
interworking (which is a real issue when an application is Thumb-2 but various
library functions use Arm assembly).
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Subject: =?UTF-8?B?W0J1ZyBjKysvOTIyMDFdIE5ldzogImludGVybmFsIGNvbXBpbGVyIGVycm9y?= =?UTF-8?B?OiDigJh2ZXJpZnlfZ2ltcGxl4oCZIGZhaWxlZCIgd2l0aCAtc3RkPWMrKzJh?Date: Wed, 23 Oct 2019 17:56:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92201
Bug ID: 92201
Summary: "internal compiler error: ‘verify_gimple’ failed" with
-std=c++2a
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: sbergman at redhat dot com
Target Milestone: ---
With recent trunk:
> $ gcc/trunk/inst/bin/g++ --version
> g++ (GCC) 10.0.0 20191023 (experimental)
> Copyright (C) 2019 Free Software Foundation, Inc.
> This is free software; see the source for copying conditions. There is NO
> warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
> $ cat test.cc
> int f(void (*p)()) { return (*reinterpret_cast<int (*)()>(p))(); }
> $ gcc/trunk/inst/bin/g++ -std=c++2a -c test.cc
> test.cc: In function ‘int f(void (*)())’:
> test.cc:1:5: error: invalid conversion in gimple call
> 1 | int f(void (*p)()) { return (*reinterpret_cast<int (*)()>(p))(); }
> | ^
> int
>
> void
>
> D.2079 = p.0_1 ();
> test.cc:1:5: internal compiler error: ‘verify_gimple’ failed
> 0xeebc2d verify_gimple_in_seq(gimple*)
> ../../src/gcc/tree-cfg.c:5079
> 0xc4ea46 gimplify_body(tree_node*, bool)
> ../../src/gcc/gimplify.c:14440
> 0xc4ec13 gimplify_function_tree(tree_node*)
> ../../src/gcc/gimplify.c:14530
> 0xada597 cgraph_node::analyze()
> ../../src/gcc/cgraphunit.c:667
> 0xadcdcf analyze_functions
> ../../src/gcc/cgraphunit.c:1126
> 0xadd9b2 symbol_table::finalize_compilation_unit()
> ../../src/gcc/cgraphunit.c:2840
> Please submit a full bug report,
> with preprocessed source if appropriate.
> Please include the complete backtrace with any bug report.
> See <https://gcc.gnu.org/bugs/> for instructions.
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Subject: =?UTF-8?B?W0J1ZyBjKysvOTIyMDFdIFsxMCBSZWdyZXNzaW9uXSAiaW50ZXJuYWwgY29t?= =?UTF-8?B?cGlsZXIgZXJyb3I6IOKAmHZlcmlmeV9naW1wbGXigJkgZmFpbGVkIiB3aXRo?= =?UTF-8?B?IC1zdGQ9YysrMmE=?Date: Wed, 23 Oct 2019 18:08:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-10-23
CC| |jakub at gcc dot gnu.org,
| |mpolacek at gcc dot gnu.org
Target Milestone|--- |10.0
Summary|"internal compiler error: |[10 Regression] "internal
|‘verify_gimple’ failed" |compiler error:
|with -std=c++2a |‘verify_gimple’ failed"
| |with -std=c++2a
Ever confirmed|0 |1
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Started with r276562.
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Subject: [Bug c++/91548] [10 Regression] Regression in constexpr evaluation of std::array
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |patch
--- Comment #8 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Patch posted: https://gcc.gnu.org/ml/gcc-patches/2019-10/msg01685.html
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Subject: [Bug gcov-profile/91971] Profile directory concatenated with object file path
Date: Wed, 23 Oct 2019 18:13:00 -0000
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--- Comment #5 from qinzhao at gcc dot gnu.org ---
Author: qinzhao
Date: Wed Oct 23 18:12:39 2019
New Revision: 277344
URL: https://gcc.gnu.org/viewcvs?rev=277344&root=gcc&view=rev
Log:
2019-10-23 qing zhao <qing.zhao@oracle.com>
PR gcov-profile/91971
* coverage.c (coverage_init): Mangle the full path of filename when
filename is a absolute path.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/coverage.c
>From gcc-bugs-return-657358-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 23 18:13:45 2019
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Subject: [Bug fortran/92178] Segmentation fault after passing allocatable array as intent(out) and its element as value into the same subroutine
Date: Wed, 23 Oct 2019 18:13:00 -0000
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--- Comment #8 from kargl at gcc dot gnu.org ---
Patch submitted.
https://gcc.gnu.org/ml/gcc-patches/2019-10/msg01686.html
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qinzhao at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #6 from qinzhao at gcc dot gnu.org ---
the patch has been checked in upstream gcc today.
>From gcc-bugs-return-657360-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 23 18:25:58 2019
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/92200] Shared pointer not destroyed
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
You create a cycle in the shared_ptr ownership, so the reference count never
goes to zero and never destroys the object.
a->tfut has a reference to the shared state created by std::async, and that
shared state has a reference to a. That means the reference count equals two:
auto a = make_shared<A>();
a->start_async();
std::cout << "reference count: " << a.use_count() << '\n';
a->tfut.wait();
std::cout << "reference count: " << a.use_count() << '\n';
a.reset();
This prints:
Constructing this 0x7fd710000b30
Start async this 0x7fd710000b30
reference count: 2
reference count: 2
Constructing this 0x7fd710001170
Start thread this 0x7fd710001170
Destroying this 0x7fd710001170
When you do a.reset() the reference count goes to one, and so the object is
never destroyed.
To break this cycle you need to use get() not wait(), so that the future
releases its reference on the shared state:
auto a = make_shared<A>();
a->start_async();
std::cout << "reference count: " << a.use_count() << '\n';
a->tfut.get();
std::cout << "reference count: " << a.use_count() << '\n';
a.reset();
Now it prints:
Constructing this 0x7fece0000b30
Start async this 0x7fece0000b30
reference count: 2
reference count: 1
Destroying this 0x7fece0000b30
Constructing this 0x7fece0000b30
Start thread this 0x7fece0000b30
Destroying this 0x7fece0000b30
So there is no bug in shared_ptr.
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Subject: [Bug other/92202] New: [10 regression] Compilation error in gcc/ipa-reference.c in r277345
Date: Wed, 23 Oct 2019 18:44:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92202
Bug ID: 92202
Summary: [10 regression] Compilation error in
gcc/ipa-reference.c in r277345
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Reporter: seurer at gcc dot gnu.org
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/home/seurer/gcc/gcc-test2/gcc/ipa-reference.c: In function 'void
varpool_removal_hook(varpool_node*, void*)':
/home/seurer/gcc/gcc-test2/gcc/ipa-reference.c:440:3: error: expected ',' or
';' before 'if'
if (id)
^~
/home/seurer/gcc/gcc-test2/gcc/ipa-reference.c:439:8: warning: unused variable
'id' [-Wunused-variable]
int *id = ipa_reference_vars_map->get (node->decl)
^~
/home/seurer/gcc/gcc-test2/gcc/ipa-reference.c: In function 'void
ipa_reference_c_finalize()':
/home/seurer/gcc/gcc-test2/gcc/ipa-reference.c:1295:5: error: expected ';'
before '}' token
}
^
------------------------------------------------------------------------
r277345 | hubicka | 2019-10-23 13:18:31 -0500 (Wed, 23 Oct 2019) | 14 lines
* ipa-reference.h (ipa_reference_var_uid): Move offline.
* ipa-reference.c (reference_vars_map_t): new type.
(ipa_reference_vars_map, ipa_reference_vars_uids): New static vars.
(ipa_reference_var_uid): Implement.
(varpool_node_hooks): New static var.
(varpool_removal_hook): New function.
(is_improper): Do not check bitmap for id==-1
(get_static_name): Update.
(ipa_init): Initialize new datastructures.
(analyze_function): Do not recompute ids.
(propagate): Free reference_vars_to_consider.
(stream_out_bitmap): Update.
(ipa_reference_read_optimization_summary): Update.
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 47097
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47097&action=edit
gcc10-pr92201.patch
Untested fix.
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P1
Known to work| |9.2.0
Known to fail| |10.0, 9.2.1
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|10.0 |9.3
Summary|[10 Regression] "internal |[9/10 Regression] "internal
|compiler error: |compiler error:
|‘verify_gimple’ failed" |‘verify_gimple’ failed"
|with -std=c++2a |with -std=c++2a
>From gcc-bugs-return-657365-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 23 20:01:39 2019
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Subject: [Bug c++/91427] Implement P1825R0, Merged wording for P0527R1 and P1155R3
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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>From gcc-bugs-return-657366-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 23 21:46:19 2019
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Subject: [Bug tree-optimization/92163] [10 Regression] ICE: Segmentation fault (in bitmap_set_bit)
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--- Comment #6 from prathamesh3492 at gcc dot gnu.org ---
Posted updated patch upstream:
https://gcc.gnu.org/ml/gcc-patches/2019-10/msg01702.html
Thanks,
Prathamesh
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Subject: [Bug target/91927] -mstrict-align doesn't prevent unaligned accesses at -O2 and -O3 on AARCH64 targets
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Kamlesh Kumar <kamleshbhalui at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |kamleshbhalui at gmail dot com
--- Comment #6 from Kamlesh Kumar <kamleshbhalui at gmail dot com> ---
This Fixes it.
diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c
index 2e73f3515bb..155f4c45500 100644
--- a/gcc/config/aarch64/aarch64.c
+++ b/gcc/config/aarch64/aarch64.c
@@ -16161,15 +16161,9 @@ aarch64_builtin_support_vector_misalignment
(machine_mode mode,
const_tree type, int misalignment,
bool is_packed)
{
- if (TARGET_SIMD && STRICT_ALIGNMENT)
+ if (STRICT_ALIGNMENT)
{
- /* Return if movmisalign pattern is not supported for this mode. */
- if (optab_handler (movmisalign_optab, mode) == CODE_FOR_nothing)
- return false;
-
- /* Misalignment factor is unknown at compile time. */
- if (misalignment == -1)
- return false;
+ return false;
}
return default_builtin_support_vector_misalignment (mode, type,
misalignment,
is_packed);
>From gcc-bugs-return-657368-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Oct 24 02:24:32 2019
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Subject: [Bug tree-optimization/92203] New: [10 Regression] ICE in eliminate_stmt, at tree-ssa-sccvn.c:5492
Date: Thu, 24 Oct 2019 02:24:00 -0000
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Bug ID: 92203
Summary: [10 Regression] ICE in eliminate_stmt, at
tree-ssa-sccvn.c:5492
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Keywords: ice-on-invalid-code
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Priority: P3
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Target Milestone: ---
gcc-10.0.0-alpha20191020 snapshot (r277217) ICEs when compiling the following
testcase w/ -O2:
unsigned long int rr;
void
cw (int z9)
{
int m5;
unsigned long int vz = 0;
long int *na;
if (z9 == 0)
rr = 0;
else
{
na = (long int *) &m5;
for (*na = 0; *na < 1; ++*na)
{
na = (long int *) &vz;
rr /= 0;
}
}
m5 = rr / 5;
++vz;
if (vz != 0)
while (z9 < 1)
{
if (m5 >= 0)
rr += m5;
na = (long int *) &rr;
if (*na >= 0)
rr = 0;
}
}
% gcc-10.0.0-alpha20191020 -O2 -w -c vd3u37af.c
during GIMPLE pass: pre
vd3u37af.c: In function 'cw':
vd3u37af.c:4:1: internal compiler error: in eliminate_stmt, at
tree-ssa-sccvn.c:5492
4 | cw (int z9)
| ^~
0x6a3285 eliminate_dom_walker::eliminate_stmt(basic_block_def*,
gimple_stmt_iterator*)
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191020/work/gcc-10-20191020/gcc/tree-ssa-sccvn.c:5492
0xdf4ba5 eliminate_dom_walker::before_dom_children(basic_block_def*)
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191020/work/gcc-10-20191020/gcc/tree-ssa-sccvn.c:5908
0xdf4ba5 eliminate_dom_walker::before_dom_children(basic_block_def*)
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191020/work/gcc-10-20191020/gcc/tree-ssa-sccvn.c:5841
0x142113a dom_walker::walk(basic_block_def*)
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191020/work/gcc-10-20191020/gcc/domwalk.c:309
0xdece8d eliminate_with_rpo_vn(bitmap_head*)
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191020/work/gcc-10-20191020/gcc/tree-ssa-sccvn.c:6086
0xdd16c0 execute
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191020/work/gcc-10-20191020/gcc/tree-ssa-pre.c:4234
>From gcc-bugs-return-657369-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Oct 24 03:02:04 2019
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Subject: [Bug ipa/92074] [10 regression] 26% performance regression on Spec2017 548.exchange2_r
Date: Thu, 24 Oct 2019 03:02:00 -0000
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Kewen Lin <linkw at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
Assignee|unassigned at gcc dot gnu.org |hubicka at gcc dot gnu.org
--- Comment #7 from Kewen Lin <linkw at gcc dot gnu.org> ---
Verified and confirm the commit can recover the number.
>From gcc-bugs-return-657370-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Oct 24 03:02:05 2019
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Subject: [Bug middle-end/26163] [meta-bug] missed optimization in SPEC (2k17, 2k and 2k6 and 95)
Date: Thu, 24 Oct 2019 03:02:00 -0000
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Bug 26163 depends on bug 92074, which changed state.
Bug 92074 Summary: [10 regression] 26% performance regression on Spec2017 548.exchange2_r
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92074
What |Removed |Added
----------------------------------------------------------------------------
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>From gcc-bugs-return-657371-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Oct 24 03:05:32 2019
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Subject: [Bug debug/92204] New: Confusing GDB output for an optimized C program
Date: Thu, 24 Oct 2019 03:05:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92204
Bug ID: 92204
Summary: Confusing GDB output for an optimized C program
Product: gcc
Version: 10.0
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I compiled the following code using the current gcc trunk with -O3, and then
set a breakpoint before the return statement using the current gdb trunk. When
the program stopped at that breakpoint, I printed the value of the variable i
and I got 0. I think it should be 1 in this case.
I'm not sure whether it is a problem of gcc or gdb.
$ cat src.c
int main(void)
{
int i = 0;
i++;
return 0;
}
$ gcc-trunk -v
Using built-in specs.
COLLECT_GCC=gcc-trunk
COLLECT_LTO_WRAPPER=/home/absozero/trunk/root-gcc/libexec/gcc/x86_64-pc-linux-gnu/10.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc/configure --prefix=/home/absozero/trunk/root-gcc
--enable-languages=c,c++ --disable-werror --enable-multilib
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 10.0.0 20191023 (experimental) [trunk revision 277309] (GCC)
$ gdb-trunk -v
GNU gdb (GDB) 9.0.50.20191023-git
Copyright (C) 2019 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.
$ gcc-trunk -O3 -g src.c
$ gdb-trunk a.out
GNU gdb (GDB) 9.0.50.20191023-git
Copyright (C) 2019 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-pc-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...
(gdb) l
1 int main(void)
2 {
3 int i = 0;
4 i++;
5 return 0;
6 }
(gdb) b 5
Breakpoint 1 at 0x4003a0: file src.c, line 5.
(gdb) r
Starting program: /home/sding/oct23/reduced/a.out
Breakpoint 1, main () at src.c:5
5 return 0;
(gdb) p i
$1 = 0
(gdb) q
A debugging session is active.
Inferior 1 [process 27339] will be killed.
Quit anyway? (y or n) y
$
I also checked the DWARF .debug_line information. The starting address 0x4003a0
corresponds to many line numbers.
I don't know what the View column means.
$ readelf -wL a.out
Contents of the .debug_line section:
CU: src.c:
File name Line number Starting address View
src.c 2 0x4003a0
src.c 3 0x4003a0 1
src.c 4 0x4003a0 2
src.c 5 0x4003a0 3
src.c 6 0x4003a0 4
src.c 6 0x4003a3
$
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Subject: [Bug c++/90205] Wformat-signedness detects %d and suggests %d fixit hint
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--- Comment #9 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Tavian Barnes from comment #8)
> Maybe "argument 2 has type 'double' (promoted from 'float')"?
Yes, that seems better to me, at least...
>From gcc-bugs-return-657373-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Oct 24 05:07:13 2019
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Subject: [Bug target/91766] -fvisibility=hidden during -fpic still uses GOT indirection on arm64
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Kamlesh Kumar <kamleshbhalui at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |kamleshbhalui at gmail dot com
--- Comment #9 from Kamlesh Kumar <kamleshbhalui at gmail dot com> ---
This fixes it.
diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c
index 2e73f3515bb..6fb87d5f49f 100644
--- a/gcc/config/aarch64/aarch64.c
+++ b/gcc/config/aarch64/aarch64.c
@@ -12539,6 +12539,10 @@ aarch64_override_options_internal (struct gcc_options
*opts)
if (opts->x_flag_strict_volatile_bitfields < 0 && abi_version_at_least (2))
opts->x_flag_strict_volatile_bitfields = 1;
+ /* defaults to flag_no_common unless disabled with fcommon. */
+ if (!global_options_set.x_flag_no_common)
+ flag_no_common = 1;
+
if (aarch64_stack_protector_guard == SSP_GLOBAL
&& opts->x_aarch64_stack_protector_guard_offset_str)
{
>From gcc-bugs-return-657374-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Oct 24 05:10:01 2019
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Subject: [Bug fortran/92178] Segmentation fault after passing allocatable array as intent(out) and its element as value into the same subroutine
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martin <mscfd at gmx dot net> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mscfd at gmx dot net
--- Comment #9 from martin <mscfd at gmx dot net> ---
Is this possibly related to bug 87142?
>From gcc-bugs-return-657375-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Oct 24 05:11:44 2019
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Subject: [Bug target/91766] -fvisibility=hidden during -fpic still uses GOT indirection on arm64
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--- Comment #10 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Kamlesh Kumar from comment #9)
> This fixes it.
>
> diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c
> index 2e73f3515bb..6fb87d5f49f 100644
> --- a/gcc/config/aarch64/aarch64.c
> +++ b/gcc/config/aarch64/aarch64.c
> @@ -12539,6 +12539,10 @@ aarch64_override_options_internal (struct
> gcc_options *opts)
> if (opts->x_flag_strict_volatile_bitfields < 0 && abi_version_at_least
> (2))
> opts->x_flag_strict_volatile_bitfields = 1;
>
> + /* defaults to flag_no_common unless disabled with fcommon. */
> + if (!global_options_set.x_flag_no_common)
> + flag_no_common = 1;
> +
> if (aarch64_stack_protector_guard == SSP_GLOBAL
> && opts->x_aarch64_stack_protector_guard_offset_str)
> {
This should be a global change and not just an aarch64 change. The reason is
because then aarch64 is the odd man out when it comes to this.
>From gcc-bugs-return-657376-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Oct 24 05:25:46 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/92178] Segmentation fault after passing allocatable array as intent(out) and its element as value into the same subroutine
Date: Thu, 24 Oct 2019 05:25:00 -0000
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--- Comment #10 from Steve Kargl <sgk at troutmask dot apl.washington.edu> ---
On Thu, Oct 24, 2019 at 05:09:55AM +0000, mscfd at gmx dot net wrote:
>
> --- Comment #9 from martin <mscfd at gmx dot net> ---
> Is this possibly related to bug 87142?
>
Certainly appears that way. If I add a 'print *, ">"//trim(str%cs)//"<"
to the end of the program, when I compile and run it, the result is
>0123456789<
>From gcc-bugs-return-657377-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Oct 24 05:26:58 2019
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Subject: [Bug fortran/87142] Aliasing issue with overloaded assignment and allocatable components
Date: Thu, 24 Oct 2019 05:26:00 -0000
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kargl at gcc dot gnu.org changed:
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--- Comment #3 from kargl at gcc dot gnu.org ---
Seems that this is fixed by the patch for PR 92178
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92178
[Bug 92178] Segmentation fault after passing allocatable array as intent(out)
and its element as value into the same subroutine
>From gcc-bugs-return-657378-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Oct 24 05:51:31 2019
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Subject: [Bug libstdc++/88466] [C++17] Support std::hardware_destructive_interference_size and std:: hardware_constructive_interference_size
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Jason Merrill <jason at gcc dot gnu.org> changed:
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--- Comment #6 from Jason Merrill <jason at gcc dot gnu.org> ---
https://github.com/itanium-cxx-abi/cxx-abi/issues/74
>From gcc-bugs-return-657379-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Oct 24 05:54:54 2019
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Subject: =?UTF-8?B?W0J1ZyBjKysvOTIyMDFdIFs5LzEwIFJlZ3Jlc3Npb25dICJpbnRlcm5hbCBj?= =?UTF-8?B?b21waWxlciBlcnJvcjog4oCYdmVyaWZ5X2dpbXBsZeKAmSBmYWlsZWQiIHdp?= =?UTF-8?B?dGggLXN0ZD1jKysyYQ==?Date: Thu, 24 Oct 2019 05:54:00 -0000
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--- Comment #3 from Stephan Bergmann <sbergman at redhat dot com> ---
(In reply to Jakub Jelinek from comment #2)
> Untested fix.
Building LibreOffice (from which I had distilled the reproducer) works fine for
me again with that patch. Thanks!
>From gcc-bugs-return-657380-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Oct 24 06:35:44 2019
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Subject: [Bug debug/92204] Confusing GDB output for an optimized C program
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
main ()
{
<bb 2> [local count: 1073741824]:
# DEBUG BEGIN_STMT
# DEBUG i => 0
# DEBUG BEGIN_STMT
# DEBUG i => 1
# DEBUG BEGIN_STMT
return 0;
}
main:
.LFB0:
.file 1 "t.c"
.loc 1 2 1
.cfi_startproc
.loc 1 3 3
.LVL0:
.loc 1 4 3
.loc 1 5 3
.loc 1 6 1 is_stmt 0
xorl %eax, %eax
ret
So I guess this is an issue with SFN not supported by gdb. Note that
for me it always prints 1 (at 'start' as well as at end). Note there
are not enough different PCs to describe all program states without SFN.
I have tried gdb 8.2.
>From gcc-bugs-return-657381-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Oct 24 06:36:10 2019
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Subject: [Bug testsuite/92199] [10 regression] g++.old-deja/g++.robertl/eb133b.C fails after r277300
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Subject: [Bug bootstrap/92202] [10 regression] Compilation error in gcc/ipa-reference.c in r277345
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-657383-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Oct 24 06:40:15 2019
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Subject: [Bug tree-optimization/92203] [10 Regression] ICE in eliminate_stmt, at tree-ssa-sccvn.c:5492
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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 #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mine.
>From gcc-bugs-return-657384-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Oct 24 08:08:42 2019
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Subject: [Bug fortran/92174] runtime error: index 15 out of bounds for type 'gfc_expr *[15]
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92174
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Last reconfirmed| |2019-10-24
Resolution|FIXED |---
Assignee|kargl at gcc dot gnu.org |marxin at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #11 from Martin Liška <marxin at gcc dot gnu.org> ---
I see two more places where similar UBSAN happens, I'm testing a patch.
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Subject: [Bug other/63426] [meta-bug] Issues found with -fsanitize=undefined
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63426
Bug 63426 depends on bug 92174, which changed state.
Bug 92174 Summary: runtime error: index 15 out of bounds for type 'gfc_expr *[15]
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92174
What |Removed |Added
----------------------------------------------------------------------------
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Subject: [Bug c/92205] New: ice in vect_get_vec_def_for_stmt_copy, at tree-vect-stmts.c:1688
Date: Thu, 24 Oct 2019 08:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92205
Bug ID: 92205
Summary: ice in vect_get_vec_def_for_stmt_copy, at
tree-vect-stmts.c:1688
Product: gcc
Version: 10.0
Status: UNCONFIRMED
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Priority: P3
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Created attachment 47098
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47098&action=edit
C source code
For the attached C code, with recent gcc trunk and compiler flag -O3,
does this:
during GIMPLE pass: vect
In file included from lib/timingsafe_bcmp.c:1:
include/string.h: In function ‘timingsafe_bcmp’:
include/string.h:104:5: internal compiler error: in
vect_get_vec_def_for_stmt_copy, at tree-vect-stmts.c:1688
0x70eda5 vect_get_vec_def_for_stmt_copy(vec_info*, tree_node*)
../../trunk/gcc/tree-vect-stmts.c:1688
0x70eda5 vect_get_vec_def_for_stmt_copy(vec_info*, tree_node*)
../../trunk/gcc/tree-vect-stmts.c:1680
0x70eda5 vectorizable_conversion
../../trunk/gcc/tree-vect-stmts.c:5153
0x10ee32b vect_transform_stmt(_stmt_vec_info*, gimple_stmt_iterator*,
_slp_tree*, _slp_instance*)
../../trunk/gcc/tree-vect-stmts.c:10832
The bug seems to start sometime between revision 277300 and 277350.
I'll have a go at reducing the code.
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Subject: [Bug c/92205] ice in vect_get_vec_def_for_stmt_copy, at tree-vect-stmts.c:1688
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--- Comment #1 from David Binderman <dcb314 at hotmail dot com> ---
Reduced code is
unsigned char *a;
b() {
long c;
int d = 0;
for (; c; ++c)
d |= a[c];
return d;
}
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Subject: [Bug tree-optimization/92111] [10 Regression] ICE during GIMPLE pass: dom
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--- Comment #9 from Martin Liška <marxin at gcc dot gnu.org> ---
Unfortunately, I can't reproduce the ICE on a Linux machine.
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Subject: [Bug c/92205] ice in vect_get_vec_def_for_stmt_copy, at tree-vect-stmts.c:1688
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Dmitry G. Dyachenko <dimhen at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |dimhen at gmail dot com
--- Comment #2 from Dmitry G. Dyachenko <dimhen at gmail dot com> ---
For me
r277307 PASS
r277341 FAIL
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Subject: [Bug fortran/92191] internal compiler error: Segmentation fault
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--- Comment #8 from Martin Liška <marxin at gcc dot gnu.org> ---
Sorry, but I can't reproduce that problem on my Linux machine :/
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Subject: [Bug tree-optimization/92205] [10 Regression] ICE in vect_get_vec_def_for_stmt_copy, at tree-vect-stmts.c:1688 since r277322
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Known to work| |9.2.0
Last reconfirmed| |2019-10-24
Component|c |tree-optimization
CC| |marxin at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Ever confirmed|0 |1
Summary|ice in |[10 Regression] ICE in
|vect_get_vec_def_for_stmt_c |vect_get_vec_def_for_stmt_c
|opy, at |opy, at
|tree-vect-stmts.c:1688 |tree-vect-stmts.c:1688
| |since r277322
Known to fail| |10.0
--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, started with r277322.
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Subject: [Bug tree-optimization/92205] [10 Regression] ICE in vect_get_vec_def_for_stmt_copy, at tree-vect-stmts.c:1688 since r277322
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Target Milestone|--- |10.0
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Subject: [Bug tree-optimization/92205] [10 Regression] ICE in vect_get_vec_def_for_stmt_copy, at tree-vect-stmts.c:1688 since r277322
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
OK, so pattern recognition made a reduction with a conversion out of this and
it was relaxing of the vectorizable_reduction code that let this through.
This is in fact _not_ a sing-changing conversion reduction anymore:
# d_15 = PHI <d_11(6), 0(16)>
_4 = *_3;
_5 = (int) _4;
patt_24 = (unsigned char) d_15;
patt_23 = _4 | patt_24;
patt_22 = (int) patt_23; // was d_11 = _5 | d_15;
and now the suspicous
/* To properly compute ncopies we are interested in the widest
input type in case we're looking at a widening accumulation. */
if (tem
&& (!vectype_in
|| (GET_MODE_SIZE (SCALAR_TYPE_MODE (TREE_TYPE (vectype_in)))
< GET_MODE_SIZE (SCALAR_TYPE_MODE (TREE_TYPE (tem))))))
vectype_in = tem;
comes in seeing a v16qi input resulting in ncopies == 1.
>From gcc-bugs-return-657394-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Oct 24 08:49:40 2019
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Subject: [Bug fortran/92174] runtime error: index 15 out of bounds for type 'gfc_expr *[15]
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--- Comment #12 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Thu Oct 24 08:49:02 2019
New Revision: 277367
URL: https://gcc.gnu.org/viewcvs?rev=277367&root=gcc&view=rev
Log:
Fix another UBSAN in Fortran coarray.
2019-10-24 Martin Liska <mliska@suse.cz>
PR fortran/92174
* array.c (gfc_resolve_array_spec): Break the loop
for out of bounds index.
* resolve.c (is_non_constant_shape_array): Likewise.
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/array.c
trunk/gcc/fortran/resolve.c
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Bug 63426 depends on bug 92174, which changed state.
Bug 92174 Summary: runtime error: index 15 out of bounds for type 'gfc_expr *[15]
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92174
What |Removed |Added
----------------------------------------------------------------------------
Status|REOPENED |RESOLVED
Resolution|--- |FIXED
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----------------------------------------------------------------------------
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--- Comment #13 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed now, I'm not planning to make backports.
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Created attachment 47100
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47100&action=edit
attachment-36069-1.eml
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Your email was bounced...
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>From gcc-bugs-return-657400-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Oct 24 08:55:38 2019
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Subject: [Bug c++/92206] [10 Regression] ICE in strip_typedefs, at cp/tree.c:1682 since r277281
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What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-10-24
CC| |rsandifo at gcc dot gnu.org
Known to work| |9.2.0
Target Milestone|--- |10.0
Ever confirmed|0 |1
Known to fail| |10.0
>From gcc-bugs-return-657399-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Oct 24 08:55:13 2019
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Subject: [Bug c++/92206] New: [10 Regression] ICE in strip_typedefs, at cp/tree.c:1682 since r277281
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92206
Bug ID: 92206
Summary: [10 Regression] ICE in strip_typedefs, at
cp/tree.c:1682 since r277281
Product: gcc
Version: 10.0
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I see the ICE in Firefox:
$ g++ unified.ii -c -Wno-invalid-offsetof -fsyntax-only
In file included from
/home/abuild/rpmbuild/BUILD/obj/js/src/gc/Unified_cpp_js_src_gc0.cpp:29:
/home/abuild/rpmbuild/BUILD/firefox-69.0.3/js/src/gc/GC.cpp:6518:46: internal
compiler error: in strip_typedefs, at cp/tree.c:1682
0x5c5ba0 strip_typedefs(tree_node*, bool*, unsigned int)
../../gcc/cp/tree.c:1682
0x5c5ba0 strip_typedefs(tree_node*, bool*, unsigned int)
../../gcc/cp/tree.c:1462
0x6f4311 canonicalize_type_argument
../../gcc/cp/pt.c:7928
0x6f4311 canonicalize_type_argument
../../gcc/cp/pt.c:7923
0x70734d coerce_template_parms
../../gcc/cp/pt.c:8771
0x71842a lookup_template_class_1
../../gcc/cp/pt.c:9608
0x71842a lookup_template_class(tree_node*, tree_node*, tree_node*, tree_node*,
int, int)
../../gcc/cp/pt.c:9978
0x730e0d finish_template_type(tree_node*, tree_node*, int)
../../gcc/cp/semantics.c:3396
0x6e28fd cp_parser_template_id
../../gcc/cp/parser.c:16545
0x6e2af7 cp_parser_class_name
../../gcc/cp/parser.c:23416
0x6df890 cp_parser_qualifying_entity
../../gcc/cp/parser.c:6724
0x6df890 cp_parser_nested_name_specifier_opt
../../gcc/cp/parser.c:6408
0x6dcce2 cp_parser_simple_type_specifier
../../gcc/cp/parser.c:17925
0x6cdc58 cp_parser_type_specifier
../../gcc/cp/parser.c:17583
0x6e13c8 cp_parser_type_specifier_seq
../../gcc/cp/parser.c:22123
0x6da354 cp_parser_type_id_1
../../gcc/cp/parser.c:21952
0x6dc803 cp_parser_template_type_arg
../../gcc/cp/parser.c:22043
0x6e1572 cp_parser_template_argument
../../gcc/cp/parser.c:16984
0x6e1572 cp_parser_template_argument_list
../../gcc/cp/parser.c:16895
0x6e1572 cp_parser_enclosed_template_argument_list
../../gcc/cp/parser.c:29278
I'm reducing the test-case now..
>From gcc-bugs-return-657401-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Oct 24 09:07:38 2019
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Subject: [Bug tree-optimization/65930] Reduction with sign-change not handled
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Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ro at gcc dot gnu.org
--- Comment #20 from Rainer Orth <ro at gcc dot gnu.org> ---
Created attachment 47101
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47101&action=edit
32-bit sparc-sun-solaris2.11 vect-reduc-2char-big-array.c.158t.vect
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Subject: [Bug tree-optimization/65930] Reduction with sign-change not handled
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--- Comment #21 from Rainer Orth <ro at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #19)
> Author: rguenth
> Date: Wed Oct 23 12:41:49 2019
> New Revision: 277322
>
> URL: https://gcc.gnu.org/viewcvs?rev=277322&root=gcc&view=rev
> Log:
> 2019-10-23 Richard Biener <rguenther@suse.de>
>
> PR tree-optimization/65930
> * tree-vect-loop.c (check_reduction_path): Allow conversions
> that only change the sign.
> (vectorizable_reduction): Relax latch def stmts we handle further.
>
> * gcc.dg/vect/vect-reduc-2char-big-array.c: Adjust.
> * gcc.dg/vect/vect-reduc-2char.c: Likewise.
> * gcc.dg/vect/vect-reduc-2short.c: Likewise.
> * gcc.dg/vect/vect-reduc-dot-s8b.c: Likewise.
> * gcc.dg/vect/vect-reduc-pattern-2c.c: Likewise.
This patch caused a couple of regressions on Solaris/SPARC (32 and 64-bit):
+FAIL: gcc.dg/vect/vect-reduc-2char-big-array.c -flto -ffat-lto-objects
scan-tree-dump-times vect "vectorized 3 loops" 1
+FAIL: gcc.dg/vect/vect-reduc-2char-big-array.c scan-tree-dump-times vect
"vectorized 3 loops" 1
+FAIL: gcc.dg/vect/vect-reduc-2char.c -flto -ffat-lto-objects
scan-tree-dump-times vect "vectorized 3 loops" 1
+FAIL: gcc.dg/vect/vect-reduc-2char.c scan-tree-dump-times vect "vectorized 3
loops" 1
+FAIL: gcc.dg/vect/vect-reduc-2short.c -flto -ffat-lto-objects
scan-tree-dump-times vect "vectorized 3 loops" 1
+FAIL: gcc.dg/vect/vect-reduc-2short.c scan-tree-dump-times vect "vectorized 3
loops" 1
+FAIL: gcc.dg/vect/vect-reduc-dot-s8b.c -flto -ffat-lto-objects
scan-tree-dump-times vect "vectorized 1 loops" 1
+FAIL: gcc.dg/vect/vect-reduc-dot-s8b.c scan-tree-dump-times vect "vectorized 1
loops" 1
+FAIL: gcc.dg/vect/vect-reduc-pattern-2c.c -flto -ffat-lto-objects
scan-tree-dump-times vect "vectorized 1 loops" 1
+FAIL: gcc.dg/vect/vect-reduc-pattern-2c.c scan-tree-dump-times vect
"vectorized 1 loops" 1
I'm attaching the vect-reduc-2char-big-array.c dump as an example.
>From gcc-bugs-return-657403-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Oct 24 09:10:15 2019
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Subject: [Bug target/91927] -mstrict-align doesn't prevent unaligned accesses at -O2 and -O3 on AARCH64 targets
Date: Thu, 24 Oct 2019 09:10:00 -0000
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--- Comment #7 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
(In reply to Kamlesh Kumar from comment #6)
> This Fixes it.
>
> diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c
> index 2e73f3515bb..155f4c45500 100644
> --- a/gcc/config/aarch64/aarch64.c
> +++ b/gcc/config/aarch64/aarch64.c
> @@ -16161,15 +16161,9 @@ aarch64_builtin_support_vector_misalignment
> (machine_mode mode,
> const_tree type, int
> misalignment,
> bool is_packed)
> {
> - if (TARGET_SIMD && STRICT_ALIGNMENT)
> + if (STRICT_ALIGNMENT)
> {
> - /* Return if movmisalign pattern is not supported for this mode. */
> - if (optab_handler (movmisalign_optab, mode) == CODE_FOR_nothing)
> - return false;
> -
> - /* Misalignment factor is unknown at compile time. */
> - if (misalignment == -1)
> - return false;
> + return false;
> }
> return default_builtin_support_vector_misalignment (mode, type,
> misalignment,
> is_packed);
No, that bodges around it. It's not a fix.
>From gcc-bugs-return-657404-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Oct 24 09:16:30 2019
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Subject: [Bug target/92207] New: pr36449.C fails on arm after r277179
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Bug ID: 92207
Summary: pr36449.C fails on arm after r277179
Product: gcc
Version: 10.0
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As discussed in https://gcc.gnu.org/ml/gcc-patches/2019-10/msg01619.html
I have noticed a regression after r277179.
However, it seems tricky to reproduce, and I had to manually regenerate the
toolchains produced by my automatic CI system.
It might be related to the changes in linker offsets.
I'm attaching the full binaries produced at r277178 and r277179, along with the
traces produced with qemu 4.1.0:
qemu-arm -D in_asm,cpu pr36449.exe
Note that qemu traces do not dump all the target instructions, so it's probably
better to use gdb + qemu.
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--- Comment #1 from Christophe Lyon <clyon at gcc dot gnu.org> ---
Created attachment 47102
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Executable from r277178
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Subject: [Bug target/92207] pr36449.C fails on arm after r277179
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--- Comment #3 from Christophe Lyon <clyon at gcc dot gnu.org> ---
Created attachment 47104
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Execution trace for r277178
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Subject: [Bug target/92207] pr36449.C fails on arm after r277179
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--- Comment #4 from Christophe Lyon <clyon at gcc dot gnu.org> ---
Created attachment 47105
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Execution trace for r277179
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92207
--- Comment #2 from Christophe Lyon <clyon at gcc dot gnu.org> ---
Created attachment 47103
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47103&action=edit
Executable from r277179
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Subject: [Bug tree-optimization/91812] [7 Regression] GCC ignores volatile modifier
Date: Thu, 24 Oct 2019 09:39:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91812
--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Oct 24 09:38:56 2019
New Revision: 277370
URL: https://gcc.gnu.org/viewcvs?rev=277370&root=gcc&view=rev
Log:
2019-10-24 Richard Biener <rguenther@suse.de>
Backport from mainline
2019-10-17 Richard Biener <rguenther@suse.de>
PR debug/91887
* dwarf2out.c (gen_formal_parameter_die): Also try to match
context_die against a DW_TAG_GNU_formal_parameter_pack parent.
* g++.dg/debug/dwarf2/pr91887.C: New testcase.
2019-09-19 Richard Biener <rguenther@suse.de>
PR tree-optimization/91812
* tree-ssa-phiprop.c (propagate_with_phi): Do not replace
volatile loads.
* gcc.dg/torture/pr91812.c: New testcase.
Added:
branches/gcc-7-branch/gcc/testsuite/g++.dg/debug/dwarf2/pr91887.C
branches/gcc-7-branch/gcc/testsuite/gcc.dg/torture/pr91812.c
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/dwarf2out.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
branches/gcc-7-branch/gcc/tree-ssa-phiprop.c
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Subject: [Bug debug/91887] [7 Regression] -fdebug-types-section ICE building chromium
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91887
--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Oct 24 09:38:56 2019
New Revision: 277370
URL: https://gcc.gnu.org/viewcvs?rev=277370&root=gcc&view=rev
Log:
2019-10-24 Richard Biener <rguenther@suse.de>
Backport from mainline
2019-10-17 Richard Biener <rguenther@suse.de>
PR debug/91887
* dwarf2out.c (gen_formal_parameter_die): Also try to match
context_die against a DW_TAG_GNU_formal_parameter_pack parent.
* g++.dg/debug/dwarf2/pr91887.C: New testcase.
2019-09-19 Richard Biener <rguenther@suse.de>
PR tree-optimization/91812
* tree-ssa-phiprop.c (propagate_with_phi): Do not replace
volatile loads.
* gcc.dg/torture/pr91812.c: New testcase.
Added:
branches/gcc-7-branch/gcc/testsuite/g++.dg/debug/dwarf2/pr91887.C
branches/gcc-7-branch/gcc/testsuite/gcc.dg/torture/pr91812.c
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/dwarf2out.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
branches/gcc-7-branch/gcc/tree-ssa-phiprop.c
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Subject: [Bug tree-optimization/91812] [7 Regression] GCC ignores volatile modifier
Date: Thu, 24 Oct 2019 09:40:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
Known to fail| |7.4.0
--- Comment #12 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug debug/91887] [7 Regression] -fdebug-types-section ICE building chromium
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
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Known to fail| |7.4.0
--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug target/92207] [10 Regression] pr36449.C fails on arm after r277179
Date: Thu, 24 Oct 2019 09:42:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |10.0
Summary|pr36449.C fails on arm |[10 Regression] pr36449.C
|after r277179 |fails on arm after r277179
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/67491] [meta-bug] concepts issues
Date: Thu, 24 Oct 2019 09:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67491
Bug 67491 depends on bug 88338, which changed state.
Bug 88338 Summary: Implement P0898R3, C++20 concepts library.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88338
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Subject: [Bug libstdc++/88322] Implement C++20 library features.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88338
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----------------------------------------------------------------------------
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From: "nils.reiche at dlr dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/92208] New: internal compile error, character array of dynamic length returned from function and passed to subroutine
Date: Thu, 24 Oct 2019 09:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92208
Bug ID: 92208
Summary: internal compile error, character array of dynamic
length returned from function and passed to subroutine
Product: gcc
Version: 9.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: nils.reiche at dlr dot de
Target Milestone: ---
Description:
A function creates and return an array of characters of a certain length that
is allocated at the call of the function. When the returned array is not passed
to any other function, the code compiles and runs perfectly. But passing this
character array to another subroutine causes an internal compiler error.
Attached is the source code of the test program. It has been working for
compiler versions gcc-5.2 and gcc-8.2, others were not tested.
Source code:
program stringtest
implicit none
integer, parameter :: noVars = 2
print*, "varNames: ", createVarnames("var",noVars)
call function1(noVars,createVarnames("var",noVars),"path")
contains
function createVarnames(string,noVars) result(stringArray)
implicit none
character(len=*), intent(in) :: string
integer, intent(in) :: noVars
character(len=len_trim(string)+6), dimension(noVars) :: stringArray
integer :: i
do i=1,noVars
write(stringArray(i),'(a,i0)') string, i
enddo
end function createVarnames
subroutine function1(noVars,varNames,path)
implicit none
integer, intent(in) :: noVars
character(len=*), intent(in) :: path
character(len=*), dimension(noVars) :: varNames
print*, "function1-path : ", trim(path)
print*, "function1-varNames: ", varNames
end subroutine function1
end program stringtest
Compiler specifications:
gfortran -v
Using built-in specs.
COLLECT_GCC=gfortran
COLLECT_LTO_WRAPPER=/home_as/ta/moes_mc/software_rhel7/compilers/gcc-9.2.0-install/libexec/gcc/x86_64-pc-linux-gnu/9.2.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-9.2.0/configure
--prefix=/home_as/ta/moes_mc/software_rhel7/compilers/gcc-9.2.0-install
--enable-threads
Thread model: posix
gcc version 9.2.0 (GCC)
Compiler error message:
gfortran -Wall -Wextra string_test.F90
string_test.F90:1:0:
1 | program stringtest
|
internal compiler error: ..__result from createvarnames referenced in
stringtest
0xbbac19 convert_nonlocal_reference_op
../../gcc-9.2.0/gcc/tree-nested.c:1053
0xd84882 walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*),
void*, hash_set<tree_node*, false, default_hash_traits<tree_node*> >*,
tree_node* (*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*),
void*, hash_set<tree_node*, false, default_hash_traits<tree_node*> >*))
../../gcc-9.2.0/gcc/tree.c:12151
0x909619 walk_gimple_op(gimple*, tree_node* (*)(tree_node**, int*, void*),
walk_stmt_info*)
../../gcc-9.2.0/gcc/gimple-walk.c:253
0x9099f1 walk_gimple_stmt(gimple_stmt_iterator*, tree_node*
(*)(gimple_stmt_iterator*, bool*, walk_stmt_info*), tree_node* (*)(tree_node**,
int*, void*), walk_stmt_info*)
../../gcc-9.2.0/gcc/gimple-walk.c:586
0x909b30 walk_gimple_seq_mod(gimple**, tree_node* (*)(gimple_stmt_iterator*,
bool*, walk_stmt_info*), tree_node* (*)(tree_node**, int*, void*),
walk_stmt_info*)
../../gcc-9.2.0/gcc/gimple-walk.c:51
0x909ab1 walk_gimple_stmt(gimple_stmt_iterator*, tree_node*
(*)(gimple_stmt_iterator*, bool*, walk_stmt_info*), tree_node* (*)(tree_node**,
int*, void*), walk_stmt_info*)
../../gcc-9.2.0/gcc/gimple-walk.c:631
0x909b30 walk_gimple_seq_mod(gimple**, tree_node* (*)(gimple_stmt_iterator*,
bool*, walk_stmt_info*), tree_node* (*)(tree_node**, int*, void*),
walk_stmt_info*)
../../gcc-9.2.0/gcc/gimple-walk.c:51
0x909a71 walk_gimple_stmt(gimple_stmt_iterator*, tree_node*
(*)(gimple_stmt_iterator*, bool*, walk_stmt_info*), tree_node* (*)(tree_node**,
int*, void*), walk_stmt_info*)
../../gcc-9.2.0/gcc/gimple-walk.c:675
0x909b30 walk_gimple_seq_mod(gimple**, tree_node* (*)(gimple_stmt_iterator*,
bool*, walk_stmt_info*), tree_node* (*)(tree_node**, int*, void*),
walk_stmt_info*)
../../gcc-9.2.0/gcc/gimple-walk.c:51
0x909a71 walk_gimple_stmt(gimple_stmt_iterator*, tree_node*
(*)(gimple_stmt_iterator*, bool*, walk_stmt_info*), tree_node* (*)(tree_node**,
int*, void*), walk_stmt_info*)
../../gcc-9.2.0/gcc/gimple-walk.c:675
0x909b30 walk_gimple_seq_mod(gimple**, tree_node* (*)(gimple_stmt_iterator*,
bool*, walk_stmt_info*), tree_node* (*)(tree_node**, int*, void*),
walk_stmt_info*)
../../gcc-9.2.0/gcc/gimple-walk.c:51
0xbb8708 walk_body
../../gcc-9.2.0/gcc/tree-nested.c:703
0xbb8ee0 walk_function
../../gcc-9.2.0/gcc/tree-nested.c:714
0xbb8ee0 walk_all_functions
../../gcc-9.2.0/gcc/tree-nested.c:779
0xbbbe0c lower_nested_functions(tree_node*)
../../gcc-9.2.0/gcc/tree-nested.c:3507
0x7cae9c cgraph_node::analyze()
../../gcc-9.2.0/gcc/cgraphunit.c:673
0x7cd4d7 analyze_functions
../../gcc-9.2.0/gcc/cgraphunit.c:1126
0x7ce0c2 symbol_table::finalize_compilation_unit()
../../gcc-9.2.0/gcc/cgraphunit.c:2837
Please submit a full bug report,
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Subject: [Bug libstdc++/88338] Implement P0898R3, C++20 concepts library.
Date: Thu, 24 Oct 2019 09:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88338
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
P0898R3 is fully implemented as of r277369.
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Subject: [Bug libstdc++/88338] Implement P0898R3, C++20 concepts library.
Date: Thu, 24 Oct 2019 09:48:00 -0000
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Thu Oct 24 09:47:25 2019
New Revision: 277371
URL: https://gcc.gnu.org/viewcvs?rev=277371&root=gcc&view=rev
Log:
PR libstdc++/88338 Implement P0898R3, C++20 concepts library
The implementation is already complete but this updates the docs and
adds tests for the feature test macro.
* doc/xml/manual/status_cxx2020.xml: Update status.
* doc/html/*: Regenerate.
* testsuite/std/concepts/1.cc: New test.
* testsuite/std/concepts/2.cc: New test.
Added:
trunk/libstdc++-v3/testsuite/std/concepts/1.cc
trunk/libstdc++-v3/testsuite/std/concepts/2.cc
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/doc/html/manual/status.html
trunk/libstdc++-v3/doc/xml/manual/status_cxx2020.xml
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Subject: [Bug tree-optimization/65930] Reduction with sign-change not handled
Date: Thu, 24 Oct 2019 09:54:00 -0000
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--- Comment #22 from Tamar Christina <tnfchris at gcc dot gnu.org> ---
It also causes failures on AArch64.
FAIL: gcc.target/aarch64/sve/reduc_2.c
FAIL: gcc.target/aarch64/sve/slp_7.c
FAIL: gcc.target/aarch64/sve/slp_5.c
FAIL: gcc.target/aarch64/sve/reduc_1.c
I've also noticed a few ICEs on SPEC but haven't pinpointed it to this commit
yet. Running a bisect.
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Subject: [Bug tree-optimization/65930] Reduction with sign-change not handled
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--- Comment #23 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Rainer Orth from comment #21)
> (In reply to Richard Biener from comment #19)
> > Author: rguenth
> > Date: Wed Oct 23 12:41:49 2019
> > New Revision: 277322
> >
> > URL: https://gcc.gnu.org/viewcvs?rev=277322&root=gcc&view=rev
> > Log:
> > 2019-10-23 Richard Biener <rguenther@suse.de>
> >
> > PR tree-optimization/65930
> > * tree-vect-loop.c (check_reduction_path): Allow conversions
> > that only change the sign.
> > (vectorizable_reduction): Relax latch def stmts we handle further.
> >
> > * gcc.dg/vect/vect-reduc-2char-big-array.c: Adjust.
> > * gcc.dg/vect/vect-reduc-2char.c: Likewise.
> > * gcc.dg/vect/vect-reduc-2short.c: Likewise.
> > * gcc.dg/vect/vect-reduc-dot-s8b.c: Likewise.
> > * gcc.dg/vect/vect-reduc-pattern-2c.c: Likewise.
>
> This patch caused a couple of regressions on Solaris/SPARC (32 and 64-bit):
>
> +FAIL: gcc.dg/vect/vect-reduc-2char-big-array.c -flto -ffat-lto-objects
> scan-tree-dump-times vect "vectorized 3 loops" 1
> +FAIL: gcc.dg/vect/vect-reduc-2char-big-array.c scan-tree-dump-times vect
> "vectorized 3 loops" 1
> +FAIL: gcc.dg/vect/vect-reduc-2char.c -flto -ffat-lto-objects
> scan-tree-dump-times vect "vectorized 3 loops" 1
> +FAIL: gcc.dg/vect/vect-reduc-2char.c scan-tree-dump-times vect "vectorized
> 3 loops" 1
> +FAIL: gcc.dg/vect/vect-reduc-2short.c -flto -ffat-lto-objects
> scan-tree-dump-times vect "vectorized 3 loops" 1
> +FAIL: gcc.dg/vect/vect-reduc-2short.c scan-tree-dump-times vect "vectorized
> 3 loops" 1
> +FAIL: gcc.dg/vect/vect-reduc-dot-s8b.c -flto -ffat-lto-objects
> scan-tree-dump-times vect "vectorized 1 loops" 1
> +FAIL: gcc.dg/vect/vect-reduc-dot-s8b.c scan-tree-dump-times vect
> "vectorized 1 loops" 1
> +FAIL: gcc.dg/vect/vect-reduc-pattern-2c.c -flto -ffat-lto-objects
> scan-tree-dump-times vect "vectorized 1 loops" 1
> +FAIL: gcc.dg/vect/vect-reduc-pattern-2c.c scan-tree-dump-times vect
> "vectorized 1 loops" 1
>
> I'm attaching the vect-reduc-2char-big-array.c dump as an example.
OK, there's
/vol/gcc/src/hg/trunk/local/gcc/testsuite/gcc.dg/vect/vect-reduc-2char-big-array.c:44:9:
missed: not vectorized: relevant stmt not supported: min_47 = MIN_EXPR <_20,
min_88>;
looks like those XFAILs are not expected to pass within the constraints
of the testcases (guess that was to be expected). There's vect_no_int_min_max
to cover up I guess.
For vect-reduc-dot-s8b.c I wonder why it detected the widen_mult pattern
but failed vectorization (dump file?) Otherwise there's
vect_widen_mult_qi_to_hi which sparc doesn't have. At least that was used
in the vect-reduc-pattern-2c.c case.
I'm going to install a patch.
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--- Comment #24 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Oct 24 09:59:24 2019
New Revision: 277372
URL: https://gcc.gnu.org/viewcvs?rev=277372&root=gcc&view=rev
Log:
2019-10-24 Richard Biener <rguenther@suse.de>
PR tree-optimization/65930
* gcc.dg/vect/vect-reduc-2char-big-array.c: Adjust again.
* gcc.dg/vect/vect-reduc-2char.c: Likewise.
* gcc.dg/vect/vect-reduc-2short.c: Likewise.
* gcc.dg/vect/vect-reduc-dot-s8b.c: Likewise.
* gcc.dg/vect/vect-reduc-pattern-2c.c: Likewise.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/vect/vect-reduc-2char-big-array.c
trunk/gcc/testsuite/gcc.dg/vect/vect-reduc-2char.c
trunk/gcc/testsuite/gcc.dg/vect/vect-reduc-2short.c
trunk/gcc/testsuite/gcc.dg/vect/vect-reduc-dot-s8b.c
trunk/gcc/testsuite/gcc.dg/vect/vect-reduc-pattern-2c.c
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65930
--- Comment #25 from rguenther at suse dot de <rguenther at suse dot de> ---
On Thu, 24 Oct 2019, tnfchris at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65930
>
> --- Comment #22 from Tamar Christina <tnfchris at gcc dot gnu.org> ---
> It also causes failures on AArch64.
>
>
> FAIL: gcc.target/aarch64/sve/reduc_2.c
> FAIL: gcc.target/aarch64/sve/slp_7.c
> FAIL: gcc.target/aarch64/sve/slp_5.c
At least for this one there's the comment
/* ??? At present we don't treat the int8_t and int16_t loops as
reductions. */
but I guess it's the same for the rest. You have to fixup the testcases
yourself - they are too complex and fragile.
> FAIL: gcc.target/aarch64/sve/reduc_1.c
>
> I've also noticed a few ICEs on SPEC but haven't pinpointed it to this commit
> yet. Running a bisect.
Might be PR92205, I'm testing a patch for that.
>From gcc-bugs-return-657422-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Oct 24 10:02:37 2019
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Subject: [Bug target/92207] [10 Regression] pr36449.C fails on arm after r277179
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--- Comment #5 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
Apart from the addresses used, the traces are identical right up until the
latter version crashes.
The testcase tries to allocate 128Mb+4bytes of memory, so my suspicion is that
this is a test that needs more memory in the simulation. Why this patch
triggers this failure I'm not sure.
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Subject: [Bug target/92207] [10 Regression] pr36449.C fails on arm after r277179
Date: Thu, 24 Oct 2019 10:11:00 -0000
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--- Comment #6 from Christophe Lyon <clyon at gcc dot gnu.org> ---
In particular, the execution continues after the last block dumped by qemu:
0x00018e40: e5974008 ldr r4, [r7, #8]
0x00018e44: e0898008 add r8, sb, r8
0x00018e48: e3888001 orr r8, r8, #1
0x00018e4c: e5848004 str r8, [r4, #4]
0x00018e50: eaffff14 b #0x18aa8
I set a breakpoint at 0x00018e40, then single-step until the crash:
=> 0x18e40 <_malloc_r+1732>: ldr r4, [r7, #8]
=> 0x18e44 <_malloc_r+1736>: add r8, r9, r8
=> 0x18e48 <_malloc_r+1740>: orr r8, r8, #1
=> 0x18e4c <_malloc_r+1744>: str r8, [r4, #4]
=> 0x18e50 <_malloc_r+1748>: b 0x18aa8 <_malloc_r+812>
=> 0x18aa8 <_malloc_r+812>: ldr r3, [r10, #44] ; 0x2c
=> 0x18aac <_malloc_r+816>: cmp r3, r1
=> 0x18ab0 <_malloc_r+820>: ldr r3, [r10, #48] ; 0x30
=> 0x18ab4 <_malloc_r+824>: strcc r1, [r10, #44] ; 0x2c
=> 0x18ab8 <_malloc_r+828>: cmp r3, r1
=> 0x18abc <_malloc_r+832>: strcc r1, [r10, #48] ; 0x30
=> 0x18ac0 <_malloc_r+836>: bic r8, r8, #3
=> 0x18ac4 <_malloc_r+840>: sub r3, r8, r5
=> 0x18ac8 <_malloc_r+844>: cmp r3, #15
=> 0x18acc <_malloc_r+848>: movgt r2, #0
=> 0x18ad0 <_malloc_r+852>: movle r2, #1
=> 0x18ad4 <_malloc_r+856>: cmp r5, r8
=> 0x18ad8 <_malloc_r+860>: orrhi r2, r2, #1
=> 0x18adc <_malloc_r+864>: cmp r2, #0
=> 0x18ae0 <_malloc_r+868>: beq 0x18ba4 <_malloc_r+1064>
=> 0x18ba4 <_malloc_r+1064>: add r2, r4, r5
=> 0x18ba8 <_malloc_r+1068>: orr r3, r3, #1
=> 0x18bac <_malloc_r+1072>: orr r5, r5, #1
=> 0x18bb0 <_malloc_r+1076>: str r5, [r4, #4]
=> 0x18bb4 <_malloc_r+1080>: mov r0, r6
=> 0x18bb8 <_malloc_r+1084>: str r2, [r7, #8]
=> 0x18bbc <_malloc_r+1088>: add r4, r4, #8
=> 0x18bc0 <_malloc_r+1092>: str r3, [r2, #4]
(gdb) p /x $r2
$1 = 0x804a568
(gdb) si
Program received signal SIGSEGV, Segmentation fault.
0x00018bc0 in _malloc_r (reent_ptr=0x49098 <impure_data>, bytes=<optimized
out>)
at
/tmp/7992549.tmpdir/aci-gcc-fsf/sources/newlib/newlib/libc/stdlib/mallocr.c:2592
2592 in
/tmp/7992549.tmpdir/aci-gcc-fsf/sources/newlib/newlib/libc/stdlib/mallocr.c
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Subject: [Bug tree-optimization/65930] Reduction with sign-change not handled
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--- Comment #26 from Tamar Christina <tnfchris at gcc dot gnu.org> ---
> At least for this one there's the comment
> /* ??? At present we don't treat the int8_t and int16_t loops as
> reductions. */
>
> but I guess it's the same for the rest. You have to fixup the testcases
> yourself - they are too complex and fragile.
Ah yeah fair enough. Thanks!
> > I've also noticed a few ICEs on SPEC but haven't pinpointed it to this commit
> > yet. Running a bisect.
>
> Might be PR92205, I'm testing a patch for that.
Ah yeah it's that one. Thanks. I just noticed it so didn't get a chance to find
an existing report. I'll follow that one. Thanks!
>From gcc-bugs-return-657426-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Oct 24 10:13:58 2019
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Subject: [Bug target/92207] [10 Regression] pr36449.C fails on arm after r277179
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--- Comment #7 from Christophe Lyon <clyon at gcc dot gnu.org> ---
When single-stepping in the r277178 executable, the final
=> 0x18bc0 <_malloc_r+1092>: str r3, [r2, #4]
succeeds and
(gdb) p /x $r2
$2 = 0x804aa40
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Subject: [Bug target/92190] [10 Regression] ICE in sp_valid_at, at config/i386/i386.c:6162 since r276648
Date: Thu, 24 Oct 2019 10:20:00 -0000
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--- Comment #1 from Uroš Bizjak <ubizjak at gmail dot com> ---
It looks that we got partial saves of MS ABI functions all wrong.
According to Table 4 on page 10 of [1], the MS ABI callee saves only lower
128bit parts of XMM6 - XMM15. So, there is no guarantee that upper parts of
XMM6 - XMM15 will be saved. This means, that vzeroupper insertion has no effect
on MS ABI functions, and can be emitted without concern on how upper parts of
YMM/XMM registers are passed over function calls.
Also, the problem with "precise" vzeroupper description is, that clobber now
forces save of callee-saved register, so XMM6 - XMM15 are always saved, as soon
as vzeroupper is emitted.
Someone with access to authoritative documentation should confirm the above.
[1] https://www.agner.org/optimize/calling_conventions.pdf
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Subject: [Bug rtl-optimization/90706] [9/10 Regression] Useless code generated for stack / register operations on AVR
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Georg-Johann Lay <gjl at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-10-24
Summary|[9 Regression] Useless code |[9/10 Regression] Useless
|generated for stack / |code generated for stack /
|register operations on AVR |register operations on AVR
Ever confirmed|0 |1
--- Comment #4 from Georg-Johann Lay <gjl at gcc dot gnu.org> ---
Still an issue with v10.
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Subject: [Bug tree-optimization/65930] Reduction with sign-change not handled
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--- Comment #27 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Oct 24 10:23:52 2019
New Revision: 277373
URL: https://gcc.gnu.org/viewcvs?rev=277373&root=gcc&view=rev
Log:
2019-10-24 Richard Biener <rguenther@suse.de>
PR tree-optimization/65930
* gcc.dg/vect/vect-reduc-2short.c: Fix typo.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/vect/vect-reduc-2short.c
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Subject: [Bug other/63426] [meta-bug] Issues found with -fsanitize=undefined
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--- Comment #15 from postmaster@trippelsdorf-de.bounceio.net ---
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>From gcc-bugs-return-657431-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Oct 24 11:07:00 2019
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Subject: [Bug other/63426] [meta-bug] Issues found with -fsanitize=undefined
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--- Comment #16 from postmaster@trippelsdorf-de.bounceio.net ---
Created attachment 47107
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47107&action=edit
attachment-70446-1.eml
>From gcc-bugs-return-657432-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Oct 24 11:25:25 2019
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Subject: [Bug tree-optimization/92203] [10 Regression] ICE in eliminate_stmt, at tree-ssa-sccvn.c:5492
Date: Thu, 24 Oct 2019 11:25:00 -0000
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Oct 24 11:23:54 2019
New Revision: 277374
URL: https://gcc.gnu.org/viewcvs?rev=277374&root=gcc&view=rev
Log:
2019-10-24 Richard Biener <rguenther@suse.de>
PR tree-optimization/92203
* treee-ssa-sccvn.c (eliminate_dom_walker::eliminate_stmt):
Skip eliminating conversion stmts inserted by insertion.
* gcc.dg/torture/pr92203.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr92203.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-sccvn.c
>From gcc-bugs-return-657433-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Oct 24 11:27:17 2019
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Subject: [Bug tree-optimization/92203] [9 Regression] ICE in eliminate_stmt, at tree-ssa-sccvn.c:5492
Date: Thu, 24 Oct 2019 11:27:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |10.0
Target Milestone|10.0 |9.4
Summary|[10 Regression] ICE in |[9 Regression] ICE in
|eliminate_stmt, at |eliminate_stmt, at
|tree-ssa-sccvn.c:5492 |tree-ssa-sccvn.c:5492
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed on trunk but the issue is latent at least.
>From gcc-bugs-return-657434-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Oct 24 11:46:12 2019
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Subject: [Bug target/91766] -fvisibility=hidden during -fpic still uses GOT indirection on arm64
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--- Comment #11 from Kamlesh Kumar <kamleshbhalui at gmail dot com> ---
is this good?
diff --git a/gcc/c-family/c-opts.c b/gcc/c-family/c-opts.c
index 0fffe60..9fead56 100644
--- a/gcc/c-family/c-opts.c
+++ b/gcc/c-family/c-opts.c
@@ -814,6 +814,10 @@ c_common_post_options (const char **pfilename)
&& flag_unsafe_math_optimizations == 0)
flag_fp_contract_mode = FP_CONTRACT_OFF;
+ /* defaults to flag_no_common unless disabled with fcommon. */
+ if (!global_options_set.x_flag_no_common)
+ flag_no_common = 1;
+
/* If we are compiling C, and we are outside of a standards mode,
we can permit the new values from ISO/IEC TS 18661-3 for
FLT_EVAL_METHOD. Otherwise, we must restrict the possible values to
>From gcc-bugs-return-657435-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Oct 24 11:49:39 2019
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From: "amker at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/85471] closing a "thread" in "C++" using "pthread_exit(NULL)" creates a "SIGABRT"
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bin cheng <amker at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |amker at gcc dot gnu.org
--- Comment #6 from bin cheng <amker at gcc dot gnu.org> ---
I ran into a stackoverflow entry with following code:
#include <unistd.h>
#include <pthread.h>
#include <sys/types.h>
#include <signal.h>
static void cleanup(void *ptr)
{
}
void *child(void *ptr)
{
pthread_cleanup_push(cleanup, NULL);
pthread_exit(NULL);
pthread_cleanup_pop(1);
return NULL;
}
int main()
{
pthread_t foo;
pthread_create(&foo, NULL, child, NULL);
pthread_join(foo, NULL);
return 0;
}
The abort can be reproduced when compiled using gcc-8.3 with following options:
$ g++ -o a.out test.cc -g -Wall -fexceptions -pthread -static-libstdc++
-static-libgcc
$ gdb --args ./a.out
(gdb) r
(gdb) bt
#0 0x0000ffffbf4972c8 in raise () from /lib64/libc.so.6
#1 0x0000ffffbf498940 in abort () from /lib64/libc.so.6
#2 0x000000000040ec94 in _Unwind_SetGR ()
#3 0x0000000000401c4c in __gxx_personality_v0 ()
#4 0x0000ffffbec3fab8 in _Unwind_ForcedUnwind_Phase2
(exc=exc@entry=0xffffbf462670, context=context@entry=0xffffbf461560,
frames_p=frames_p@entry=0xffffbf461198)
at ../../../libgcc/unwind.inc:182
#5 0x0000ffffbec3fea0 in _Unwind_ForcedUnwind (exc=0xffffbf462670,
stop=0xffffbf5f7950 <unwind_stop>, stop_argument=0xffffbf461a30) at
../../../libgcc/unwind.inc:217
#6 0x0000ffffbf5fa15c in _Unwind_ForcedUnwind () from /lib64/libpthread.so.0
#7 0x0000ffffbf5f7aac in __pthread_unwind () from /lib64/libpthread.so.0
#8 0x0000ffffbf5f1a08 in pthread_exit () from /lib64/libpthread.so.0
#9 0x0000000000401460 in child (ptr=0x0) at test.cc:13
#10 0x0000ffffbf5f0bb0 in start_thread () from /lib64/libpthread.so.0
#11 0x0000ffffbf53e4c0 in thread_start () from /lib64/libc.so.6
Issue with this case is because of static-libgcc, not sure if it's the same to
the original case.
Thanks
>From gcc-bugs-return-657436-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Oct 24 11:55:38 2019
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Subject: [Bug target/91766] -fvisibility=hidden during -fpic still uses GOT indirection on arm64
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91766
--- Comment #12 from Wilco <wilco at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #10)
> This should be a global change and not just an aarch64 change. The reason
> is because then aarch64 is the odd man out when it comes to this.
Agreed, see https://gcc.gnu.org/ml/gcc-patches/2017-11/msg01549.html. It would
be great to sort that out so C and C++ finally address globals identically.
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Subject: [Bug tree-optimization/92205] [10 Regression] ICE in vect_get_vec_def_for_stmt_copy, at tree-vect-stmts.c:1688 since r277322
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug tree-optimization/92205] [10 Regression] ICE in vect_get_vec_def_for_stmt_copy, at tree-vect-stmts.c:1688 since r277322
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--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Oct 24 12:11:27 2019
New Revision: 277375
URL: https://gcc.gnu.org/viewcvs?rev=277375&root=gcc&view=rev
Log:
2019-10-24 Richard Biener <rguenther@suse.de>
PR tree-optimization/92205
* tree-vect-loop.c (vectorizable_reduction): Restrict
search for alternate vectype_in to lane-reducing patterns
we support.
* gcc.dg/vect/pr92205.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/vect/pr92205.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-vect-loop.c
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Subject: [Bug libstdc++/90682] std::terminate() will happily call a null terminate handler
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Subject: [Bug libstdc++/89164] can construct vector with non-copyable-but-trivially-copyable elements
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Subject: [Bug libstdc++/92059] Crash on tr2::dynamic_bitset::operator=() with optimization
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92059
--- Comment #12 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Thu Oct 24 12:53:55 2019
New Revision: 277376
URL: https://gcc.gnu.org/viewcvs?rev=277376&root=gcc&view=rev
Log:
PR libstdc++/92059 fix several bugs in tr2::dynamic_bitset
Backport from mainline
2019-10-11 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/92059
* include/tr2/dynamic_bitset (__dynamic_bitset_base): Define all
special member functions as defaulted. Add noexcept to most members.
(__dynamic_bitset_base(size_t, unsigned long long, const _Alloc&)):
Mask off unwanted bits in the __val parameter. Avoid undefined left
shifts.
(__dynamic_bitset_base::_M_assign): Remove.
(__dynamic_bitset_base::_M_do_reset): Use std::fill.
(__dynamic_bitset_base::_M_are_all_aux): Avoid integer promotion when
block_type has lower rank than int.
(dynamic_bitset): Add noexcept to most members. Use injected-class-name
in return types and parameter types.
(dynamic_bitset::_M_Nb): Add default member initializer.
(dynamic_bitset(), dynamic_bitset(const dynamic_bitset&)): Define as
defaulted.
(dynamic_bitset(dynamic_bitset&&)): Clear source object after move.
(dynamic_bitset::operator=(const dynamic_bitset&)): Define as
defaulted.
(dynamic_bitset::operator=(dynamic_bitset&&)): Add noexcept-specifier.
Define without using swap, to propagate allocator correctly.
(dynamic_bitset(const char*, const _Alloc&)): Use strlen.
(dynamic_bitset::_M_do_sanitize, dynamic_bitset::_M_do_fill): Use
casts to avoid unwanted integer promotions.
(dynamic_bitset::_M_copy_from_ptr): Rearrange template parameters and
add default template arguments and default argument to simplify usage.
(dynamic_bitset::_M_copy_from_string): Adjust call to _M_copy_from_ptr.
(operator==(const dynamic_bitset&, const dynamic_bitset&))
(operator<(const dynamic_bitset&, const dynamic_bitset&)): Use _M_Nb.
* include/tr2/dynamic_bitset.tcc (dynamic_bitset::_M_copy_from_ptr):
Adjust template parameters to match declaration.
* testsuite/tr2/dynamic_bitset/cmp.cc: New test.
* testsuite/tr2/dynamic_bitset/cons.cc: New test.
* testsuite/tr2/dynamic_bitset/copy.cc: New test.
* testsuite/tr2/dynamic_bitset/move.cc: New test.
* testsuite/tr2/dynamic_bitset/pr92059.cc: New test.
Added:
branches/gcc-9-branch/libstdc++-v3/testsuite/tr2/dynamic_bitset/cmp.cc
branches/gcc-9-branch/libstdc++-v3/testsuite/tr2/dynamic_bitset/cons.cc
branches/gcc-9-branch/libstdc++-v3/testsuite/tr2/dynamic_bitset/copy.cc
branches/gcc-9-branch/libstdc++-v3/testsuite/tr2/dynamic_bitset/move.cc
branches/gcc-9-branch/libstdc++-v3/testsuite/tr2/dynamic_bitset/pr92059.cc
Modified:
branches/gcc-9-branch/libstdc++-v3/ChangeLog
branches/gcc-9-branch/libstdc++-v3/include/tr2/dynamic_bitset
branches/gcc-9-branch/libstdc++-v3/include/tr2/dynamic_bitset.tcc
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Subject: [Bug libstdc++/91456] std::function and std::is_invocable_r do not understand guaranteed elision
Date: Thu, 24 Oct 2019 12:54:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91456
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Thu Oct 24 12:54:13 2019
New Revision: 277380
URL: https://gcc.gnu.org/viewcvs?rev=277380&root=gcc&view=rev
Log:
PR libstdc++/91456 make INVOKE<R> work with uncopyable prvalues
In C++17 a function can return a prvalue of a type that cannot be moved
or copied. The current implementation of std::is_invocable_r uses
std::is_convertible to test the conversion to R required by INVOKE<R>.
That fails for non-copyable prvalues, because std::is_convertible is
defined in terms of std::declval which uses std::add_rvalue_reference.
In C++17 conversion from R to R involves no copies and so is not the
same as conversion from R&& to R.
This commit changes std::is_invocable_r to check the conversion without
using std::is_convertible.
std::function also contains a similar check using std::is_convertible,
which can be fixed by simply reusing std::is_invocable_r (but because
std::is_invocable_r is not defined for C++11 it uses the underlying
std::__is_invocable_impl trait directly).
Backport from mainline
2019-08-15 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/91456
* include/bits/std_function.h (__check_func_return_type): Remove.
(function::_Callable): Use std::__is_invocable_impl instead of
__check_func_return_type.
* include/std/type_traits (__is_invocable_impl): Add another defaulted
template parameter. Define a separate partial specialization for
INVOKE and INVOKE<void>. For INVOKE<R> replace is_convertible check
with a check that models delayed temporary materialization.
* testsuite/20_util/function/91456.cc: New test.
* testsuite/20_util/is_invocable/91456.cc: New test.
Added:
branches/gcc-9-branch/libstdc++-v3/testsuite/20_util/function/91456.cc
branches/gcc-9-branch/libstdc++-v3/testsuite/20_util/is_invocable/91456.cc
Modified:
branches/gcc-9-branch/libstdc++-v3/ChangeLog
branches/gcc-9-branch/libstdc++-v3/include/bits/std_function.h
branches/gcc-9-branch/libstdc++-v3/include/std/type_traits
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/61761] [C++11] std::proj returns incorrect values
Date: Thu, 24 Oct 2019 12:55:00 -0000
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--- Comment #10 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Thu Oct 24 12:55:21 2019
New Revision: 277392
URL: https://gcc.gnu.org/viewcvs?rev=277392&root=gcc&view=rev
Log:
PR libstdc++/61761 fix std::proj for targets without C99 cproj
The current generic implementation of __complex_proj used when cproj is
not available calculates the wrong projection, giving a different result
than given by C99's cproj.
When C99 cproj is not available but isinf and copysign are, use those to
give correct results for float, double and long double. Otherwise, and
for other specializations of std::complex, just use a generic version
that returns its argument, and so doesn't support infinities.
We might want to consider adding additional overloads of __complex_proj
to support extended types such as _Float64x, _Float128 etc.
Backport from mainline
2019-05-01 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/61761
* include/std/complex (__complex_proj): Return parameter unchanged.
[_GLIBCXX_USE_C99_COMPLEX] (__complex_proj): Change overloads for
floating-point types to take std::complex arguments.
[_GLIBCXX_USE_C99_MATH_TR1] (__complex_proj): Add overloads for
floating-point types.
* testsuite/26_numerics/complex/proj.cc: New test.
Added:
branches/gcc-9-branch/libstdc++-v3/testsuite/26_numerics/complex/proj.cc
Modified:
branches/gcc-9-branch/libstdc++-v3/ChangeLog
branches/gcc-9-branch/libstdc++-v3/include/std/complex
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Subject: [Bug libstdc++/89164] can construct vector with non-copyable-but-trivially-copyable elements
Date: Thu, 24 Oct 2019 12:55:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89164
--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Thu Oct 24 12:54:58 2019
New Revision: 277388
URL: https://gcc.gnu.org/viewcvs?rev=277388&root=gcc&view=rev
Log:
PR libstdc++/89164 enforce constraints for uninitialized algos
The memmove optimizations for std::uninitialized_copy/fill/_n will
compile even if the type is not copy constructible, because std::copy
doesn't require copy construction to work. But the uninitialized
algorithms do require it.
This adds explicit static assertions to ensure we don't allow ill-formed
initializations.
Backport from mainline
2019-08-30 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/89164
* include/bits/stl_algobase.h (__copy_move): Give descriptive names
to template parameters.
* include/bits/stl_uninitialized.h (uninitialized_copy)
(uninitialized_fill, uninitialized_fill_n): Add static assertions to
diagnose invalid uses.
* testsuite/20_util/specialized_algorithms/uninitialized_copy/1.cc:
Adjust expected error.
* testsuite/20_util/specialized_algorithms/uninitialized_copy/89164.cc:
New test.
* testsuite/20_util/specialized_algorithms/uninitialized_copy_n/
89164.cc: New test.
* testsuite/20_util/specialized_algorithms/uninitialized_fill/89164.cc:
New test.
* testsuite/20_util/specialized_algorithms/uninitialized_fill_n/
89164.cc: New test.
* testsuite/23_containers/vector/cons/89164.cc: New test.
* testsuite/23_containers/vector/cons/89164_c++17.cc: New test.
Added:
branches/gcc-9-branch/libstdc++-v3/testsuite/20_util/specialized_algorithms/uninitialized_copy/89164.cc
- copied, changed from r277387,
branches/gcc-9-branch/libstdc++-v3/testsuite/20_util/specialized_algorithms/uninitialized_copy/1.cc
branches/gcc-9-branch/libstdc++-v3/testsuite/20_util/specialized_algorithms/uninitialized_copy_n/89164.cc
- copied, changed from r277387,
branches/gcc-9-branch/libstdc++-v3/testsuite/20_util/specialized_algorithms/uninitialized_copy/1.cc
branches/gcc-9-branch/libstdc++-v3/testsuite/20_util/specialized_algorithms/uninitialized_fill/89164.cc
- copied, changed from r277387,
branches/gcc-9-branch/libstdc++-v3/testsuite/20_util/specialized_algorithms/uninitialized_copy/1.cc
branches/gcc-9-branch/libstdc++-v3/testsuite/20_util/specialized_algorithms/uninitialized_fill_n/89164.cc
- copied, changed from r277387,
branches/gcc-9-branch/libstdc++-v3/testsuite/20_util/specialized_algorithms/uninitialized_copy/1.cc
branches/gcc-9-branch/libstdc++-v3/testsuite/23_containers/vector/cons/89164.cc
- copied, changed from r277387,
branches/gcc-9-branch/libstdc++-v3/testsuite/20_util/specialized_algorithms/uninitialized_copy/1.cc
branches/gcc-9-branch/libstdc++-v3/testsuite/23_containers/vector/cons/89164_c++17.cc
Modified:
branches/gcc-9-branch/libstdc++-v3/ChangeLog
branches/gcc-9-branch/libstdc++-v3/include/bits/stl_algobase.h
branches/gcc-9-branch/libstdc++-v3/include/bits/stl_uninitialized.h
branches/gcc-9-branch/libstdc++-v3/testsuite/20_util/specialized_algorithms/uninitialized_copy/1.cc
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Subject: [Bug libstdc++/92059] Crash on tr2::dynamic_bitset::operator=() with optimization
Date: Thu, 24 Oct 2019 12:55:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |9.3
Known to fail| |7.4.0, 8.3.0, 9.2.0
--- Comment #13 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Also fixed for 9.3
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Subject: [Bug libstdc++/92143] std::pmr::polymorphic_allocator<char> throws bad_alloc on macOS
Date: Thu, 24 Oct 2019 12:55:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92143
--- Comment #9 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Thu Oct 24 12:54:44 2019
New Revision: 277386
URL: https://gcc.gnu.org/viewcvs?rev=277386&root=gcc&view=rev
Log:
PR libstdc++/92143 adjust for OS X aligned_alloc behaviour
OS X 10.15 adds aligned_alloc but it has the same restriction as the AIX
version, namely that alignments smaller than sizeof(void*) are not
supported.
Backport from mainline
2019-10-18 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/92143
* libsupc++/new_opa.cc (operator new) [__APPLE__]: Increase alignment
to at least sizeof(void*).
Modified:
branches/gcc-9-branch/libstdc++-v3/ChangeLog
branches/gcc-9-branch/libstdc++-v3/libsupc++/new_opa.cc
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Subject: [Bug libstdc++/91456] std::function and std::is_invocable_r do not understand guaranteed elision
Date: Thu, 24 Oct 2019 12:56:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Fixed for 9.3 too.
>From gcc-bugs-return-657447-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Oct 24 12:56:05 2019
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Subject: [Bug libstdc++/90682] std::terminate() will happily call a null terminate handler
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90682
--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Thu Oct 24 12:55:27 2019
New Revision: 277393
URL: https://gcc.gnu.org/viewcvs?rev=277393&root=gcc&view=rev
Log:
PR libstdc++/90682 allow set_terminate(0) and set_unexpected(0)
Make these functions restore the default handlers when passed a null
pointer. This is consistent with std::pmr::set_default_resource(0), and
also matches the current behaviour of libc++.
In order to avoid duplicating the preprocessor condition from
eh_term_handler.cc more that into a new eh_term_handler.h header and
define a macro that can be used in both eh_term_handler.cc and
eh_terminate.cc.
Backport from mainline
2019-05-31 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/90682
* libsupc++/eh_term_handler.cc: Include eh_term_handler.h to get
definition of _GLIBCXX_DEFAULT_TERM_HANDLER.
* libsupc++/eh_term_handler.h: New header defining
_GLIBCXX_DEFAULT_TERM_HANDLER.
* libsupc++/eh_terminate.cc: Include eh_term_handler.h.
(set_terminate): Restore default handler when argument is null.
(set_unexpected): Likewise.
* testsuite/18_support/set_terminate.cc: New test.
* testsuite/18_support/set_unexpected.cc: New test.
Added:
branches/gcc-9-branch/libstdc++-v3/libsupc++/eh_term_handler.h
- copied, changed from r277392,
branches/gcc-9-branch/libstdc++-v3/libsupc++/eh_term_handler.cc
branches/gcc-9-branch/libstdc++-v3/testsuite/18_support/set_terminate.cc
branches/gcc-9-branch/libstdc++-v3/testsuite/18_support/set_unexpected.cc
Modified:
branches/gcc-9-branch/libstdc++-v3/ChangeLog
branches/gcc-9-branch/libstdc++-v3/libsupc++/eh_term_handler.cc
branches/gcc-9-branch/libstdc++-v3/libsupc++/eh_terminate.cc
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Subject: [Bug libstdc++/61761] [C++11] std::proj returns incorrect values
Date: Thu, 24 Oct 2019 12:58:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|10.0 |9.3
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From: "tangyixuan at mail dot dlut.edu.cn" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/92209] New: Imprecise column number for -Wstrict-prototypes
Date: Thu, 24 Oct 2019 12:59:00 -0000
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Bug ID: 92209
Summary: Imprecise column number for -Wstrict-prototypes
Product: gcc
Version: 10.0
Status: UNCONFIRMED
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Priority: P3
Component: c
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GCC outputs a wrong column number of a declared function warning:
$ gcc-trunk -Wstrict-prototypes -c s.c
s.c:1:1: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
1 | static int func_1();
| ^~~~~~
gcc version 10.0.0 20191020 (experimental) (GCC)
target: Ubuntu 4.8.5-4ubuntu8~14.04.2
$ clang -Wstrict-prototypes -c s.c
s.c:1:18: warning: this function declaration is not a prototype
[-Wstrict-prototypes]
static int func_1();
^
void
1 warning generated.
$ cat s.c
static int func_1();
>From gcc-bugs-return-657451-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Oct 24 13:17:18 2019
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From: "tangyixuan at mail dot dlut.edu.cn" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/92210] New: no warning for invariable used in loop condition
Date: Thu, 24 Oct 2019 13:17:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92210
Bug ID: 92210
Summary: no warning for invariable used in loop condition
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: tangyixuan at mail dot dlut.edu.cn
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There is no warning for an invariable used in loop condition:
$: cat s.c
int main(){
for(int i = 0; i <2;){
}
}
$: gcc-trunk -Wall -Wextra -pedantic -c s.c
gcc version 10.0.0 20191020 (experimental) (GCC)
target: Ubuntu 4.8.5-4ubuntu8~14.04.2
$: clang-trunk -Weverything -pedantic -c s.c
s.c:2:18: warning: variable 'i' used in loop condition not modified in loop
body [-Wfor-loop-analysis]
for(int i = 0; i <2;){
^
1 warning generated.
Is it a better way to report the warning in loop condition, just like the way
Clang does?
>From gcc-bugs-return-657452-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Oct 24 13:21:22 2019
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From: "pilarlatiesa at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/92211] New: Lamdas in unevaluated context bug
Date: Thu, 24 Oct 2019 13:21:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92211
Bug ID: 92211
Summary: Lamdas in unevaluated context bug
Product: gcc
Version: 9.2.0
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This code compiles fine (https://godbolt.org/z/JeuX4m):
template<int dim, int rank>
struct Tensor {};
template<int dim, int rank>
double mag(Tensor<dim, rank> const &) { return 0.0; }
template<int dim, int rank>
using TMag = decltype([](Tensor<dim, rank> const &x) { return mag(x); });
template<typename TOp>
class UnaryExpr
{
TOp const Op = {};
};
UnaryExpr<TMag<0, 666>> fn() { return {}; }
This one does not (https://godbolt.org/z/rD3v8E):
template<int dim, int rank>
struct Tensor {};
template<int dim, int rank>
double mag(Tensor<dim, rank> const &) { return 0.0; }
template<int dim, int rank>
using TMag = decltype([](Tensor<dim, rank> const &x) { return mag(x); });
template<typename TOp>
class UnaryExpr
{
TOp const Op = {};
};
template<int dim, int rank>
UnaryExpr<TMag<dim, rank>> fn() { return {}; }
This one causes GGC to segfault (https://godbolt.org/z/8GsGYe)
template<int dim, int rank>
struct Tensor {};
template<int dim, int rank>
double mag(Tensor<dim, rank> const &) { return 0.0; }
template<int dim, int rank>
using TMag = decltype([](Tensor<dim, rank> const &x) { return mag(x); });
template<typename TOp>
class UnaryExpr
{
TOp const Op = {};
};
template<int dim, int rank, typename T = TMag<dim, rank>>
UnaryExpr<T> fn() { return {}; }
>From gcc-bugs-return-657453-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Oct 24 14:05:26 2019
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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/91962] [10 Regression] ice in build_target_expr, at cp/tree.c:488
Date: Thu, 24 Oct 2019 14:05:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91962
--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fix:
--- a/gcc/cp/call.c
+++ b/gcc/cp/call.c
@@ -7386,7 +7386,8 @@ convert_like_real (conversion *convs, tree expr, tree fn,
int argnum,
/* direct_reference_binding might have inserted a ck_qual under
this ck_ref_bind for the benefit of conversion sequence ranking.
Ignore the conversion; we'll create our own below. */
- if (next_conversion (convs)->kind == ck_qual)
+ if (next_conversion (convs)->kind == ck_qual
+ && !convs->need_temporary_p)
{
gcc_assert (same_type_p (TREE_TYPE (expr),
next_conversion (convs)->type));
>From gcc-bugs-return-657454-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Oct 24 14:14:05 2019
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Subject: [Bug libstdc++/92059] Crash on tr2::dynamic_bitset::operator=() with optimization
Date: Thu, 24 Oct 2019 14:14:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92059
--- Comment #14 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Thu Oct 24 14:13:25 2019
New Revision: 277396
URL: https://gcc.gnu.org/viewcvs?rev=277396&root=gcc&view=rev
Log:
PR libstdc++/92059 fix several bugs in tr2::dynamic_bitset
Backport from mainline
2019-10-11 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/92059
* include/tr2/dynamic_bitset (__dynamic_bitset_base): Define all
special member functions as defaulted. Add noexcept to most members.
(__dynamic_bitset_base(size_t, unsigned long long, const _Alloc&)):
Mask off unwanted bits in the __val parameter. Avoid undefined left
shifts.
(__dynamic_bitset_base::_M_assign): Remove.
(__dynamic_bitset_base::_M_do_reset): Use std::fill.
(__dynamic_bitset_base::_M_are_all_aux): Avoid integer promotion when
block_type has lower rank than int.
(dynamic_bitset): Add noexcept to most members. Use injected-class-name
in return types and parameter types.
(dynamic_bitset::_M_Nb): Add default member initializer.
(dynamic_bitset(), dynamic_bitset(const dynamic_bitset&)): Define as
defaulted.
(dynamic_bitset(dynamic_bitset&&)): Clear source object after move.
(dynamic_bitset::operator=(const dynamic_bitset&)): Define as
defaulted.
(dynamic_bitset::operator=(dynamic_bitset&&)): Add noexcept-specifier.
Define without using swap, to propagate allocator correctly.
(dynamic_bitset(const char*, const _Alloc&)): Use strlen.
(dynamic_bitset::_M_do_sanitize, dynamic_bitset::_M_do_fill): Use
casts to avoid unwanted integer promotions.
(dynamic_bitset::_M_copy_from_ptr): Rearrange template parameters and
add default template arguments and default argument to simplify usage.
(dynamic_bitset::_M_copy_from_string): Adjust call to _M_copy_from_ptr.
(operator==(const dynamic_bitset&, const dynamic_bitset&))
(operator<(const dynamic_bitset&, const dynamic_bitset&)): Use _M_Nb.
* include/tr2/dynamic_bitset.tcc (dynamic_bitset::_M_copy_from_ptr):
Adjust template parameters to match declaration.
* testsuite/tr2/dynamic_bitset/cmp.cc: New test.
* testsuite/tr2/dynamic_bitset/cons.cc: New test.
* testsuite/tr2/dynamic_bitset/copy.cc: New test.
* testsuite/tr2/dynamic_bitset/move.cc: New test.
* testsuite/tr2/dynamic_bitset/pr92059.cc: New test.
Added:
branches/gcc-8-branch/libstdc++-v3/testsuite/tr2/dynamic_bitset/cmp.cc
branches/gcc-8-branch/libstdc++-v3/testsuite/tr2/dynamic_bitset/cons.cc
branches/gcc-8-branch/libstdc++-v3/testsuite/tr2/dynamic_bitset/copy.cc
branches/gcc-8-branch/libstdc++-v3/testsuite/tr2/dynamic_bitset/move.cc
branches/gcc-8-branch/libstdc++-v3/testsuite/tr2/dynamic_bitset/pr92059.cc
Modified:
branches/gcc-8-branch/libstdc++-v3/ChangeLog
branches/gcc-8-branch/libstdc++-v3/include/tr2/dynamic_bitset
branches/gcc-8-branch/libstdc++-v3/include/tr2/dynamic_bitset.tcc
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/92143] std::pmr::polymorphic_allocator<char> throws bad_alloc on macOS
Date: Thu, 24 Oct 2019 14:14:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92143
--- Comment #10 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Thu Oct 24 14:13:48 2019
New Revision: 277400
URL: https://gcc.gnu.org/viewcvs?rev=277400&root=gcc&view=rev
Log:
PR libstdc++/92143 adjust for OS X aligned_alloc behaviour
OS X 10.15 adds aligned_alloc but it has the same restriction as the AIX
version, namely that alignments smaller than sizeof(void*) are not
supported.
Backport from mainline
2019-10-18 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/92143
* libsupc++/new_opa.cc (operator new) [__APPLE__]: Increase alignment
to at least sizeof(void*).
Modified:
branches/gcc-8-branch/libstdc++-v3/ChangeLog
branches/gcc-8-branch/libstdc++-v3/libsupc++/new_opa.cc
>From gcc-bugs-return-657456-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Oct 24 14:17:21 2019
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/92059] Crash on tr2::dynamic_bitset::operator=() with optimization
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
Target Milestone|9.3 |8.4
--- Comment #15 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Fixed for 8.4 as well.
>From gcc-bugs-return-657457-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Oct 24 14:18:30 2019
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Subject: [Bug libstdc++/90682] std::terminate() will happily call a null terminate handler
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
And also 9.3.
Nobody's ever complained abut this, so I don't see a great need to backport it
to gcc-7-branch and gcc-8-branch.
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/92206] [10 Regression] ICE in strip_typedefs, at cp/tree.c:1682 since r277281
Date: Thu, 24 Oct 2019 14:22:00 -0000
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Reduced test-case:
$ cat unified.ii
template <bool> struct A;
class Vector {
template <typename> struct TypeIsGCThing {
template <typename T, typename A<T ::value>::Type> using Vector = Vector;
struct B;
template <typename> class ContainerIter {
using Action = B;
using ActionVector = Vector<Action, 0>;
ContainerIter<ActionVector> a;
};
};
};
$ g++ unified.ii -c
unified.ii:9:33: internal compiler error: in strip_typedefs, at cp/tree.c:1682
9 | ContainerIter<ActionVector> a;
| ^
0x5c5ba0 strip_typedefs(tree_node*, bool*, unsigned int)
../../gcc/cp/tree.c:1682
0x5c5ba0 strip_typedefs(tree_node*, bool*, unsigned int)
../../gcc/cp/tree.c:1462
0x6f4311 canonicalize_type_argument
../../gcc/cp/pt.c:7928
0x6f4311 canonicalize_type_argument
../../gcc/cp/pt.c:7923
0x70734d coerce_template_parms
../../gcc/cp/pt.c:8771
0x7080df coerce_innermost_template_parms
../../gcc/cp/pt.c:8903
0x71842a lookup_template_class_1
../../gcc/cp/pt.c:9608
0x71842a lookup_template_class(tree_node*, tree_node*, tree_node*, tree_node*,
int, int)
../../gcc/cp/pt.c:9978
0x730e0d finish_template_type(tree_node*, tree_node*, int)
../../gcc/cp/semantics.c:3396
0x6e28fd cp_parser_template_id
../../gcc/cp/parser.c:16545
0x6e2af7 cp_parser_class_name
../../gcc/cp/parser.c:23416
0x6df890 cp_parser_qualifying_entity
../../gcc/cp/parser.c:6724
0x6df890 cp_parser_nested_name_specifier_opt
../../gcc/cp/parser.c:6408
0x6dfe92 cp_parser_nested_name_specifier
../../gcc/cp/parser.c:6650
0x6e489a cp_parser_using_declaration
../../gcc/cp/parser.c:19603
0x6ef7bc cp_parser_member_declaration
../../gcc/cp/parser.c:24632
0x6cc220 cp_parser_member_specification_opt
../../gcc/cp/parser.c:24492
0x6cc220 cp_parser_class_specifier_1
../../gcc/cp/parser.c:23592
0x6cdc00 cp_parser_class_specifier
../../gcc/cp/parser.c:23899
0x6cdc00 cp_parser_type_specifier
../../gcc/cp/parser.c:17507
>From gcc-bugs-return-657459-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Oct 24 14:32:28 2019
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/92212] New: incompatible calls to K&R functions not diagnosed
Date: Thu, 24 Oct 2019 14:32:00 -0000
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Bug ID: 92212
Summary: incompatible calls to K&R functions not diagnosed
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: msebor at gcc dot gnu.org
Target Milestone: ---
Unlike some other compilers GCC doesn't diagnose incompatible calls to K&R
style functions in the same translation unit.
$ cat b.c && gcc -O2 -S -Wall -Wextra -Wpedantic b.c
int f (i)
int i;
{
return i;
}
int g (void)
{
return f (""); // missing warning
}
Both Clang and ICC detect the problem and issue the equivalent of:
warning: incompatible pointer to integer conversion passing 'char [1]' to
parameter of type 'int' [-Wint-conversion]
return f ("");
^~
>From gcc-bugs-return-657460-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Oct 24 14:49:37 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/92206] [10 Regression] ICE in strip_typedefs, at cp/tree.c:1682 since r277281
Date: Thu, 24 Oct 2019 14:49:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mpolacek at gcc dot gnu.org
--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Found this ICE too, my test:
template <typename> void a();
template <typename> struct b;
template <bool> using c = int;
template <typename d, typename e = decltype(a<d>)> using f = e;
template <typename e> using g = f<e>;
template <typename h> c<b<g<h>>::i> j;
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Subject: [Bug c/92210] no warning for invariable used in loop condition
Date: Thu, 24 Oct 2019 15:09:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Severity|normal |enhancement
>From gcc-bugs-return-657462-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Oct 24 15:28:46 2019
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From: "hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/92213] New: internal compiler error: in lra_assign, at lra-assigns.c:1647
Date: Thu, 24 Oct 2019 15:28:00 -0000
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Bug ID: 92213
Summary: internal compiler error: in lra_assign, at
lra-assigns.c:1647
Product: gcc
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When enabling mask register spill with:
@@ -21452,6 +21442,13 @@ ix86_get_mask_mode (poly_uint64 nunits, poly_uint64
vector_size)
static reg_class_t
ix86_spill_class (reg_class_t rclass, machine_mode mode)
{
+ if (TARGET_AVX512BW
+ && (mode == QImode
+ || mode == HImode
+ || mode == SImode
+ || (TARGET_64BIT && mode == DImode))
+ && MAYBE_INTEGER_CLASS_P (rclass))
+ return ALL_MASK_REGS;
if (0 && TARGET_GENERAL_REGS_SSE_SPILL
&& TARGET_SSE2
&& TARGET_INTER_UNIT_MOVES_TO_VEC
I ran into
during RTL pass: reload
source/grid/tria.cc: In function 'execute_refinement':
source/grid/tria.cc:9243:4: internal compiler error: in lra_assign, at
lra-assigns.c:1647
9243 | }
| ^
0xa45159 lra_assign(bool&)
/export/gnu/import/git/intel/gcc-tuning/gcc/lra-assigns.c:1647
0xa3fb4d lra(_IO_FILE*)
/export/gnu/import/git/intel/gcc-tuning/gcc/lra.c:2482
0x9fc3f1 do_reload
/export/gnu/import/git/intel/gcc-tuning/gcc/ira.c:5511
0x9fc3f1 execute
/export/gnu/import/git/intel/gcc-tuning/gcc/ira.c:5697
Please submit a full bug report,
from
if (! lra_asm_error_p && flag_checking)
/* Check correctness of allocation for call-crossed pseudos but
only when there are no asm errors as in the case of errors the
asm is removed and it can result in incorrect allocation. */
for (i = FIRST_PSEUDO_REGISTER; i < max_regno; i++)
if (lra_reg_info[i].nrefs != 0
&& reg_renumber[i] >= 0
&& overlaps_hard_reg_set_p (lra_reg_info[i].conflict_hard_regs,
PSEUDO_REGNO_MODE (i), reg_renumber[i]))
gcc_unreachable ();
LRA calls
Check for conflict
assign_by_spills <<<<< Assign mask register k0 to a pseudo
...
assign_spill_hard_regs <<<< Assign mask register k0 to a different pseudo
...
Check for conflict <<< internal compiler error
assign_by_spills
assign_spill_hard_regs fails to notice that k0 has been assigned to
a pseudo.
>From gcc-bugs-return-657463-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Oct 24 15:31:37 2019
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Subject: [Bug libstdc++/92143] std::pmr::polymorphic_allocator<char> throws bad_alloc on macOS
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--- Comment #11 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Thu Oct 24 15:31:00 2019
New Revision: 277414
URL: https://gcc.gnu.org/viewcvs?rev=277414&root=gcc&view=rev
Log:
PR libstdc++/92143 adjust for OS X aligned_alloc behaviour
OS X 10.15 adds aligned_alloc but it has the same restriction as the AIX
version, namely that alignments smaller than sizeof(void*) are not
supported.
Backport from mainline
2019-10-18 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/92143
* libsupc++/new_opa.cc (operator new) [__APPLE__]: Increase alignment
to at least sizeof(void*).
Modified:
branches/gcc-7-branch/libstdc++-v3/ChangeLog
branches/gcc-7-branch/libstdc++-v3/libsupc++/new_opa.cc
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Subject: [Bug c++/92206] [10 Regression] ICE in strip_typedefs, at cp/tree.c:1682 since r277281
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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 #3 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
Mine.
>From gcc-bugs-return-657465-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Oct 24 16:04:27 2019
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Subject: [Bug target/92207] [10 Regression] pr36449.C fails on arm after r277179
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--- Comment #8 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
I'm 95%+ sure that this is a problem with qemu+newlib with the latter not
handling out-of-memory correctly. If I run the good program to the same
instruction that faults in the bad program, I see:
Breakpoint 2, _malloc_r (reent_ptr=0x49570 <impure_data>, bytes=134217732)
at
/tmp/7992549.tmpdir/aci-gcc-fsf/sources/newlib/newlib/libc/stdlib/mallocr.c:2353
2353 in
/tmp/7992549.tmpdir/aci-gcc-fsf/sources/newlib/newlib/libc/stdlib/mallocr.c
(gdb)
Continuing.
Breakpoint 1, 0x00018bc0 in _malloc_r (reent_ptr=0x49570 <impure_data>,
bytes=<optimized out>)
at
/tmp/7992549.tmpdir/aci-gcc-fsf/sources/newlib/newlib/libc/stdlib/mallocr.c:2592
2592 in
/tmp/7992549.tmpdir/aci-gcc-fsf/sources/newlib/newlib/libc/stdlib/mallocr.c
(gdb) x/i $pc
=> 0x18bc0 <_malloc_r+1092>: str r3, [r2, #4]
(gdb) info reg r2
r2 0x804aa40 134523456
(gdb) x/x $r2
0x804aa40: 0x00000000
(gdb) x/x 0x805b000
0x805b000: Cannot access memory at address 0x805b000
So the location to be written exists and is the last mapped page of memory.
In the 'bad' program, I see
(gdb) x/i $pc
=> 0x18bc0 <_malloc_r+1092>: str r3, [r2, #4]
(gdb) p $r2
$14 = 134522216
(gdb) p *$4
$15 = {prev_size = 0, size = 0, fd = 0x804a568, bk = 0x494c0 <__malloc_av_>}
(gdb) p/x $r2
$16 = 0x804a568
(gdb) x/i $r2
0x804a568: Cannot access memory at address 0x804a568
(gdb) info reg pc
pc 0x18bc0 0x18bc0 <_malloc_r+1092>
(gdb) x/x 0x8049ffc
0x8049ffc: 0x00000000
that is the location being written is not mapped (but the page before is), this
is despite the address being lower than in the 'good' version.
Note that the difference between the two addresses being written in the two
programs is exactly the same as the difference between the VMAs of the .bss
segment in the executable files.
Consequently, I don't think this is a bug that has been introduced by this
patch, but is most likely a latent issue in either qemu or newlib (or perhaps a
combination of the two).
>From gcc-bugs-return-657466-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Oct 24 16:40:14 2019
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From: "joseph at codesourcery dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/92212] incompatible calls to K&R functions not diagnosed
Date: Thu, 24 Oct 2019 16:40:00 -0000
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--- Comment #1 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
See bugs 14030, 26732, 48091, 64526. Not sure how many bugs in this area
are genuinely different - I suspect a single bug could be considered to
cover the whole area of checking arguments to K&R functions (with
warnings, not pedwarns or errors, for bad calls), as long as all different
cases are properly covered with tests added for any fix.
>From gcc-bugs-return-657467-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Oct 24 16:43:07 2019
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Subject: [Bug c++/53610] C++11: constructors accept silly initializers
Date: Thu, 24 Oct 2019 16:43:00 -0000
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Barry Revzin <barry.revzin at gmail dot com> changed:
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--- Comment #3 from Barry Revzin <barry.revzin at gmail dot com> ---
Shorter reproduction:
struct S {
S(int);
};
S s{.why = 42};
This still compiles on trunk, even with all warnings and -pedantic.
Made for a very difficult-to-track down bug, since designated initializers are
a really nice way of mocking out named parameters (except when it's suddenly
not).
>From gcc-bugs-return-657468-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Oct 24 16:57:46 2019
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Subject: [Bug c++/53610] C++11: constructors accept silly initializers
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Last reconfirmed| |2019-10-24
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--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Oop. Confirmed.
>From gcc-bugs-return-657469-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Oct 24 17:14:50 2019
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Subject: [Bug tree-optimization/65930] Reduction with sign-change not handled
Date: Thu, 24 Oct 2019 17:14:00 -0000
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rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> changed:
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--- Comment #28 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
(In reply to Tamar Christina from comment #26)
> > At least for this one there's the comment
>
> > /* ??? At present we don't treat the int8_t and int16_t loops as
> > reductions. */
> >
> > but I guess it's the same for the rest. You have to fixup the testcases
> > yourself - they are too complex and fragile.
>
> Ah yeah fair enough. Thanks!
FWIW, I tested patches last night to fix this, but they were for the
state after: https://gcc.gnu.org/ml/gcc-patches/2019-10/msg01714.html
>From gcc-bugs-return-657470-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Oct 24 17:17:42 2019
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Subject: [Bug libstdc++/92143] std::pmr::polymorphic_allocator<char> throws bad_alloc on macOS
Date: Thu, 24 Oct 2019 17:17:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #12 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Fixed for 7.5, 8.4 and 9.3
>From gcc-bugs-return-657471-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Oct 24 17:20:04 2019
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/92214] New: Unhelpful diagnostic for static_assert( some_concept(some_type) )
Date: Thu, 24 Oct 2019 17:20:00 -0000
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Bug ID: 92214
Summary: Unhelpful diagnostic for static_assert(
some_concept(some_type) )
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Keywords: diagnostic
Severity: normal
Priority: P3
Component: c++
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Reporter: redi at gcc dot gnu.org
Blocks: 67491
Target Milestone: ---
If you accidentally use parentheses instead of angle brackets you get a
confusing error:
template<typename> concept foo = true;
static_assert( foo(int) );
Compiled with -std=gnu++2a gives:
x.cc:3:16: error: expected 'auto' or 'decltype(auto)' after 'foo'
3 | static_assert( foo(int) );
| ^~~
x.cc:3:23: error: invalid use of 'auto [requires ::foo<<placeholder>, >]'
3 | static_assert( foo(int) );
| ^
x.cc:3:19: error: missing template arguments before '(' token
3 | static_assert( foo(int) );
| ^
x.cc:3:20: error: expected primary-expression before 'int'
3 | static_assert( foo(int) );
| ^~~
I wasn't trying to declare a variable using a placeholder type (which wouldn't
be allowed in a static_assert anyway), I was trying to say foo<int>.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67491
[Bug 67491] [meta-bug] concepts issues
>From gcc-bugs-return-657472-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Oct 24 17:42:04 2019
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Subject: [Bug rtl-optimization/92213] internal compiler error: in lra_assign, at lra-assigns.c:1647
Date: Thu, 24 Oct 2019 17:42:00 -0000
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H.J. Lu <hjl.tools at gmail dot com> changed:
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--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
1. A pseudo register, 9625, was assigned to mask register k0 and
df_set_regs_ever_live was called.
2. improve_inheritance reassigned 9625 to a different hard register without
updating DF info.
3. mark_pseudo_dead was called on 9625 from process_bb_lives
EXECUTE_IF_SET_IN_SPARSESET (pseudos_live, i)
{
update_pseudo_point (i, curr_point, DEF_POINT);
mark_pseudo_dead (i);
}
mark_pseudo_dead did
lra_assert (!HARD_REGISTER_NUM_P (regno));
lra_reg_info[regno].conflict_hard_regs |= hard_regs_live;
with incorrect DF info.
>From gcc-bugs-return-657473-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Oct 24 18:21:48 2019
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From: "hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/92213] internal compiler error: in lra_assign, at lra-assigns.c:1647
Date: Thu, 24 Oct 2019 18:21:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92213
--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> ---
Created attachment 47108
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47108&action=edit
A testcase
[hjl@gnu-skx-1 mask-2]$
/export/build/gnu/tools-build/gcc-tuning-debug/build-x86_64-linux/gcc/xgcc
-B/export/build/gnu/tools-build/gcc-tuning-debug/build-x86_64-linux/gcc/ -O2
-march=skylake-avx512 -S foo.ii
during RTL pass: reload
foo.ii: In static member function ‘static void
Implementation::execute_refinement(Triangulation<spacedim>) [with int spacedim
= 3]’:
foo.ii:257:3: internal compiler error: in lra_assign, at lra-assigns.c:1647
257 | }
| ^
0x11d22d7 lra_assign(bool&)
/export/gnu/import/git/intel/gcc-tuning/gcc/lra-assigns.c:1647
0x11ca2fb lra(_IO_FILE*)
/export/gnu/import/git/intel/gcc-tuning/gcc/lra.c:2482
0x115ee51 do_reload
/export/gnu/import/git/intel/gcc-tuning/gcc/ira.c:5511
0x115f342 execute
/export/gnu/import/git/intel/gcc-tuning/gcc/ira.c:5697
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
[hjl@gnu-skx-1 mask-2]$
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From: Marilla Gordan <marilla.gordan@versionwins.com>
To: "gcc-bugs@gcc.gnu.org" <gcc-bugs@gcc.gnu.org>
Subject: MongoDB Install Base
Date: Thu, 24 Oct 2019 18:23:00 -0000
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