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* [Bug ipa/93318] [10 regression] Firefox LTO+FDO ICEs in speculative_call_info
[not found] <bug-93318-4@http.gcc.gnu.org/bugzilla/>
@ 2020-01-19 23:09 ` hubicka at ucw dot cz
2022-05-13 9:42 ` luoxhu at gcc dot gnu.org
2022-05-13 10:07 ` luoxhu at gcc dot gnu.org
2 siblings, 0 replies; 3+ messages in thread
From: hubicka at ucw dot cz @ 2020-01-19 23:09 UTC (permalink / raw)
To: gcc-bugs
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93318
--- Comment #4 from Jan Hubicka <hubicka at ucw dot cz> ---
Ok,
I managed to reproduce the crash locally (it was not that easy)
At the point of failure the node passes verification and I suppose
problem is that the call stmt hash contains indirect call while it is
supposed to contain direct call.
Edge removal code probably replaces direct edge by indreict one since it
does not know about additional speculations. I will continue tomorrow.
Honza
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friendly reminder
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Subject: [Bug tree-optimization/93321] Unlimited recursion in prepare_block_for_update
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |patch
URL| |https://gcc.gnu.org/ml/gcc-
| |patches/2020-01/msg01145.ht
| |ml
--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Posted the patch:
https://gcc.gnu.org/ml/gcc-patches/2020-01/msg01145.html
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Subject: [Bug c++/33799] Return value's destructor not executed when a local variable's destructor throws
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Jason Merrill <jason at gcc dot gnu.org> changed:
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--- Comment #12 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed for GCC 10.
>From gcc-bugs-return-666192-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jan 20 04:19:42 2020
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Subject: [Bug c++/91476] [9/10 Regression] const reference variables sharing the same name in two anonymous namespaces cause a multiple definition error
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Jason Merrill <jason at gcc dot gnu.org> changed:
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>From gcc-bugs-return-666193-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jan 20 06:28:52 2020
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Subject: [Bug fortran/93308] bind(c) subroutine changes lower bound of array argument in caller
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2020-01-20
CC| |pault at gcc dot gnu.org,
| |tkoenig at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Confirmed.
>From gcc-bugs-return-666194-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jan 20 06:41:08 2020
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/85628] Make better use of BFI (BFXIL)
Date: Mon, 20 Jan 2020 06:41:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2020-01-20
Component|target |tree-optimization
Assignee|unassigned at gcc dot gnu.org |pinskia at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Mine for GCC 11.
I can produce:
_15 = (unsigned int) b_3(D);
_13 = BIT_INSERT_EXPR <a_2(D), _15, 0 (32 bits)>;
*c_5(D) = _13;
_16 = (unsigned int) a_2(D);
_10 = BIT_INSERT_EXPR <b_3(D), _16, 0 (32 bits)>;
*d_8(D) = _10;
mov x5, x0
mov x4, x1
bfi x5, x1, 0, 32
str x5, [x2]
bfi x4, x0, 0, 32
str x4, [x3]
ret
>From gcc-bugs-return-666195-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jan 20 07:16:14 2020
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From: "felix.von.s at posteo dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/93326] New: switch optimisation of multiple jumptables into a lookup
Date: Mon, 20 Jan 2020 07:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93326
Bug ID: 93326
Summary: switch optimisation of multiple jumptables into a
lookup
Product: gcc
Version: 9.2.1
Status: UNCONFIRMED
Keywords: missed-optimization
Severity: normal
Priority: P3
Component: tree-optimization
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Reporter: felix.von.s at posteo dot de
Target Milestone: ---
Target: i686-linux-gnu
Attached two code samples are equivalent, yet they are optimised wildly
differently (with -O3 -fno-pic).
Apparently, GCC is capable of recognising that a switch/return realised by a
single jumptable can be optimised into a lookup table, but is unable to do so
when a switch is realised by multiple jumptables.
When compiling in PIC mode, neither switch is optimised into a lookup table; I
don't see a reason why it couldn't be.
>From gcc-bugs-return-666196-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jan 20 07:17:43 2020
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/93326] switch optimisation of multiple jumptables into a lookup
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93326
--- Comment #1 from felix <felix.von.s at posteo dot de> ---
Created attachment 47680
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47680&action=edit
Optimised into a lookup table of constants (-O3 -fno-pic)
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/93326] switch optimisation of multiple jumptables into a lookup
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--- Comment #2 from felix <felix.von.s at posteo dot de> ---
Created attachment 47681
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47681&action=edit
Optimised into a jumptable, then load of an immediate (-O3 -fno-pic)
>From gcc-bugs-return-666198-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jan 20 08:05:08 2020
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Subject: [Bug target/93312] [10 Regression] ICE: RTL check: expected code 'reg', have 'subreg' in rhs_regno, at rtl.h:1923
Date: Mon, 20 Jan 2020 08:05:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed I assume.
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Subject: [Bug ipa/93318] [10 regression] Firefox LTO+FDO ICEs in speculative_call_info
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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-666200-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jan 20 08:14:53 2020
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Subject: [Bug ipa/93322] [10 Regression] gcc.dg/tree-ssa/flatten-1.c ICEs with -fPIC
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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>From gcc-bugs-return-666201-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jan 20 08:27:43 2020
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Subject: [Bug target/91753] Bad register allocation of multi-register types
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Last reconfirmed| |2020-01-20
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--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
The biggest problem is set_qreg* is being used here.
This is the RTX that is produced:
(insn 38 37 39 4 (set (reg/v:XI 125 [ __o ])
(reg/v:XI 124 [ __o ]))
"/bajas/pinskia/src/toolchain-10/marvell-tools/lib/gcc/aarch64-marvell-linux-gnu/10.0.0/include/arm_neon.h":25556:9
3404 {*aarch64_movxi}
(expr_list:REG_DEAD (reg/v:XI 124 [ __o ])
(nil)))
(insn 39 38 40 4 (set (subreg:V16QI (reg/v:XI 125 [ __o ]) 0)
(reg:V16QI 134 [ _122 ]))
"/bajas/pinskia/src/toolchain-10/marvell-tools/lib/gcc/aarch64-marvell-linux-gnu/10.0.0/include/arm_neon.h":25556:9
1198 {*aarch64_simd_movv16qi}
(nil))
(insn 40 39 41 4 (set (reg/v:XI 126 [ __o ])
(reg/v:XI 125 [ __o ]))
"/bajas/pinskia/src/toolchain-10/marvell-tools/lib/gcc/aarch64-marvell-linux-gnu/10.0.0/include/arm_neon.h":25557:9
3404 {*aarch64_movxi}
(expr_list:REG_DEAD (reg/v:XI 125 [ __o ])
(nil)))
(insn 41 40 42 4 (set (subreg:V16QI (reg/v:XI 126 [ __o ]) 16)
(reg:V16QI 96 [ _6 ]))
"/bajas/pinskia/src/toolchain-10/marvell-tools/lib/gcc/aarch64-marvell-linux-gnu/10.0.0/include/arm_neon.h":25557:9
1198 {*aarch64_simd_movv16qi}
(nil))
(insn 42 41 43 4 (set (reg/v:XI 127 [ __o ])
(reg/v:XI 126 [ __o ]))
"/bajas/pinskia/src/toolchain-10/marvell-tools/lib/gcc/aarch64-marvell-linux-gnu/10.0.0/include/arm_neon.h":25558:9
3404 {*aarch64_movxi}
(expr_list:REG_DEAD (reg/v:XI 126 [ __o ])
(nil)))
(insn 43 42 44 4 (set (subreg:V16QI (reg/v:XI 127 [ __o ]) 32)
(reg:V16QI 135 [ _123 ]))
"/bajas/pinskia/src/toolchain-10/marvell-tools/lib/gcc/aarch64-marvell-linux-gnu/10.0.0/include/arm_neon.h":25558:9
1198 {*aarch64_simd_movv16qi}
(nil))
(insn 44 43 45 4 (set (reg/v:XI 128 [ __o ])
(reg/v:XI 127 [ __o ]))
"/bajas/pinskia/src/toolchain-10/marvell-tools/lib/gcc/aarch64-marvell-linux-gnu/10.0.0/include/arm_neon.h":25559:9
3404 {*aarch64_movxi}
(expr_list:REG_DEAD (reg/v:XI 127 [ __o ])
(nil)))
(insn 45 44 47 4 (set (subreg:V16QI (reg/v:XI 128 [ __o ]) 48)
(reg:V16QI 95 [ _5 ]))
"/bajas/pinskia/src/toolchain-10/marvell-tools/lib/gcc/aarch64-marvell-linux-gnu/10.0.0/include/arm_neon.h":25559:9
1198 {*aarch64_simd_movv16qi}
(nil))
Notice the move instruction inbetween. That confuses everything here.
If we had a way to generate XImode directly from 4 V16QI, and only generate one
move statement, then the register allocator would act better.
>From gcc-bugs-return-666202-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jan 20 08:28:21 2020
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From: "ming.chen1986 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug driver/93327] New: Performance degradation of povray benchmark from gcc 8.3.1 to gcc 9.2.1
Date: Mon, 20 Jan 2020 08:28:00 -0000
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Bug ID: 93327
Summary: Performance degradation of povray benchmark from gcc
8.3.1 to gcc 9.2.1
Product: gcc
Version: 9.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: driver
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Reporter: ming.chen1986 at gmail dot com
Target Milestone: ---
I'm seeing a performance degradation of povray benchmark from gcc 8.3.1 to
9.2.1 on a dual-socket Intel Xeon Platinum 8280L system. Details can be found
below. Please let me know if any other information is needed. Thanks.
Hardware spec:
CPU: Dual-socket Intel Xeon Platinum 8280L
Motherboard: Intel S2600WF
RAM: 384 GB
OS: Clear Linux 31890 (also reproduced the issue with Ubuntu 20.04 daily build
20200107)
Steps to reproduce:
# download and build the benchmark with g++ 8.3.1 and 9.2.1, respectively
wget http://www.phoronix-test-suite.com/benchmark-files/povray-3.7.0.7.tar.xz
tar -xf povray-3.7.0.7.tar.xz
cd povray-3.7.0.7/
cd unix/
autoupdate
./prebuild.sh
cd ..
automake --add-missing
LIBS="-lboost_system" ./configure COMPILED_BY="PhoronixTestSuite"
--with-boost-thread=boost_thread
make
# run the benchmark
echo 1 | ./unix/povray -benchmark
Expected results:
The benchmark binaries compiled by g++ 8.3.1 and 9.2.1 should produce similar
scores.
Actual results:
Score of g++ 8.3.1 compiled povray: 14 seconds (less is better)
Score of g++ 9.2.1 compiled povray: vary between 25 - 60 seconds (less is
better)
Output of g++ -v (8.3.1):
Using built-in specs.
COLLECT_GCC=g++-8
COLLECT_LTO_WRAPPER=/usr/lib64/gcc/x86_64-generic-linux/8/lto-wrapper
Target: x86_64-generic-linux
Configured with: ../gcc-8.3.0/configure --program-suffix=-8 --prefix=/usr
--with-pkgversion='Clear Linux OS for Intel Architecture' --libdir=/usr/lib64/
--enable-libstdcxx-pch --libexecdir=/usr/lib64 --with-system-zlib
--enable-shared --enable-gnu-indirect-function --disable-vtable-verify
--enable-threads=posix --enable-__cxa_atexit --enable-plugin
--enable-ld=default --enable-clocale=gnu --disable-multiarch --disable-multilib
--enable-lto --enable-linker-build-id --build=x86_64-generic-linux
--target=x86_64-generic-linux --enable-languages=c,c++ --enable-bootstrap
--with-ppl=yes --with-isl --includedir=/usr/include --exec-prefix=/usr
--with-glibc-version=2.28 --disable-libunwind-exceptions --with-gnu-ld
--with-tune=haswell --with-arch=westmere --enable-cet
--with-gcc-major-version-only --enable-default-pie --disable-libmpx
Thread model: posix
gcc version 8.3.1 20190513 gcc-8-branch@271113 (Clear Linux OS for Intel
Architecture)
Output of g++ -v (9.2.1):
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/lib64/gcc/x86_64-generic-linux/9/lto-wrapper
Target: x86_64-generic-linux
Configured with: ../gcc-9.2.0/configure --prefix=/usr --with-pkgversion='Clear
Linux OS for Intel Architecture' --libdir=/usr/lib64 --enable-libstdcxx-pch
--libexecdir=/usr/lib64 --with-system-zlib --enable-shared
--enable-gnu-indirect-function --disable-vtable-verify --enable-threads=posix
--enable-__cxa_atexit --enable-plugin --enable-ld=default --enable-clocale=gnu
--disable-multiarch --enable-multilib --enable-lto --disable-werror
--enable-linker-build-id --build=x86_64-generic-linux
--target=x86_64-generic-linux --enable-languages=c,c++,fortran,go
--enable-bootstrap --with-ppl=yes --with-isl --includedir=/usr/include
--exec-prefix=/usr --with-glibc-version=2.19 --disable-libunwind-exceptions
--with-gnu-ld --with-tune=haswell --with-arch=westmere --enable-cet
--disable-libmpx --with-gcc-major-version-only --enable-default-pie
Thread model: posix
gcc version 9.2.1 20191223 gcc-9-branch@279714 (Clear Linux OS for Intel
Architecture)
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Subject: [Bug c++/93313] g++: internal compiler error: Segmentation fault signal terminated program cc1plus
Date: Mon, 20 Jan 2020 08:32:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2020-01-20
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
So to be more constructive try upping your process max stack size using
'ulimit -s unlimited' and try again (I could reproduce the crash with
a 8MB stack size limit and with unlimited it's still compiling after
18 minutes and hovering at ~6GB ram for me).
>From gcc-bugs-return-666205-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jan 20 08:50:24 2020
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Subject: [Bug tree-optimization/93094] [10 Regression] ICE in maybe_gen_insn, at optabs.c:7433
Date: Mon, 20 Jan 2020 08:50:00 -0000
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--- Comment #6 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Richard Guenther <rguenth@gcc.gnu.org>:
https://gcc.gnu.org/g:9c4f0d311810eba3f4faab1295c47eb57e695fcc
commit r10-6083-g9c4f0d311810eba3f4faab1295c47eb57e695fcc
Author: Richard Biener <rguenther@suse.de>
Date: Wed Jan 15 14:25:38 2020 +0100
tree-optimization/93094 pass down VECTORIZED_CALL to versioning
When versioning is run the IL is already mangled and finding
a VECTORIZED_CALL IFN can fail.
2020-01-20 Richard Biener <rguenther@suse.de>
PR tree-optimization/93094
* tree-vectorizer.h (vect_loop_versioning): Adjust.
(vect_transform_loop): Likewise.
* tree-vectorizer.c (try_vectorize_loop_1): Pass down
loop_vectorized_call to vect_transform_loop.
* tree-vect-loop.c (vect_transform_loop): Pass down
loop_vectorized_call to vect_loop_versioning.
* tree-vect-loop-manip.c (vect_loop_versioning): Use
the earlier discovered loop_vectorized_call.
* gcc.dg/vect/pr93094.c: New testcase.
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Subject: [Bug tree-optimization/93094] [10 Regression] ICE in maybe_gen_insn, at optabs.c:7433
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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/93301] Wrong optimization: instability of uninitialized variables leads to nonsense
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--- Comment #3 from rguenther at suse dot de <rguenther at suse dot de> ---
On Fri, 17 Jan 2020, ch3root at openwall dot com wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93301
>
> --- Comment #2 from Alexander Cherepanov <ch3root at openwall dot com> ---
> The problem is much more serious. It's not that C has some guarantees about two
> values of `y` while gcc doesn't provide them. It's that one part of gcc assumes
> there are some guarantees about two values of `y` while another part of gcc
> doesn't provide such guarantees.
>
> There were many discussions about "wobbly" values (DR 260, DR 451 etc.) and I
> don't expect gcc to give the same values for two `y`s at all. The second value
> is taken in the `else` branch, which we don't care about (at least while this
> branch doesn't invoke UB). Given that `b` is `1` we know that the `then` branch
> is taken.
>
> It's surely possible to make this testcase undefined. If I understand them
> correctly, llvm folks claim that "real compilers" (gcc included I assume)
> follow rules that are more like C++ than C (see the linked clang bug report).
> The C++ rules are much more strict and make `x == y` undefined if `y` is
> uninitialized.
>
> But my guess is that the C++ rules will not help. The problem is the internal
> inconsistency so everything will blow up independently of any external rules.
But the first use of the undefined value in the comparison makes
everything wobbly. GCC cannot definitely know the "definedness"
unless it can track down an initialization chain to something
definitely "defined" like a constant.
What happens here is that GCC converts control dependence to data
dependence which makes the "undefinedness" more appearant.
But undefined behavior really means anything can happen, including
wobbling.
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Subject: [Bug fortran/93263] [9/10 Regression] -fno-automatic and RECURSIVE
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
CC| |jakub at gcc dot gnu.org
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Subject: [Bug rtl-optimization/93159] [10 Regression] ICE (segfault) during RTL pass on arm-linux-gnueabihf
Date: Mon, 20 Jan 2020 09:00:00 -0000
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
SO, at which exact stage it is, can you attach preprocessed source + gcc
options if it is reproduceable with that?
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Subject: [Bug tree-optimization/93199] [8/9 Regression] Compile time hog in sink_clobbers
Date: Mon, 20 Jan 2020 09:01:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |10.0
Summary|[8/9/10 Regression] Compile |[8/9 Regression] Compile
|time hog in sink_clobbers |time hog in sink_clobbers
--- Comment #24 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed for GCC 10. Note the testcase(s) expose other slownesses to be
categorized and filed separately (mainly -O1 [-g] is interesting here, for -O2+
we don't
provide any guarantees with these kind of testcases). But I don't want to
make this bug more complicated since the sink_clobbers stuff might be
backportable.
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Subject: [Bug fortran/93263] [9/10 Regression] -fno-automatic and RECURSIVE
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Christophe Lyon <clyon at gcc dot gnu.org> changed:
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CC| |clyon at gcc dot gnu.org
--- Comment #14 from Christophe Lyon <clyon at gcc dot gnu.org> ---
(In reply to Janne Blomqvist from comment #13)
> Running the testsuite on today's master (2020-01-18) on x86_64-pc-linux-gnu
> fails with
>
> FAIL: gfortran.dg/pr93263_1.f90 -O scan-tree-dump-not original
> "integer\\(kind=4\\) a"
Seen on arm too, both master and gcc-9
>From gcc-bugs-return-666211-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jan 20 09:30:43 2020
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Subject: [Bug debug/92763] [8/9/10 Regression] ICE in dwarf2out_abstract_function, at dwarf2out.c:22659, or in force_type_die, at dwarf2out.c:26224
Date: Mon, 20 Jan 2020 09:30:00 -0000
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
So we're inlining A::omp declare reduction y~i(A::T&)::<lambda()>::operator()
(const struct ._anon_1 * const __closure) which has no abstract origin.
For the -fno-var-tracking-assignments case we are pruning the early DIE of the
function as unused as part of prune_unused_types_prune while we don't when
VTA is enabled. That's because:
/* For -fvar-tracking-assignments, also set the mark on nodes that could be
referenced by DW_TAG_call_site DW_AT_call_origin (i.e. direct call
callees). */
cgraph_node *cnode;
FOR_EACH_FUNCTION (cnode)
if (cnode->referred_to_p (false))
{
dw_die_ref die = lookup_decl_die (cnode->decl);
if (die == NULL || die->die_mark)
continue;
for (cgraph_edge *e = cnode->callers; e; e = e->next_caller)
if (e->caller != cnode
&& opt_for_fn (e->caller->decl, flag_var_tracking_assignments))
{
prune_unused_types_mark (die, 1);
break;
}
}
I'm not sure why this code shouldn't apply to DW_TAG_inlined_subroutine
which is needed independently of -fvar-tracking-assignments ...
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Subject: [Bug target/93221] [10 Regression] ICE maximum number of generated reload insns per insn achieved (90) on aarch64
Date: Mon, 20 Jan 2020 09:40:00 -0000
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--- Comment #5 from Joel Hutton <joel.hutton at arm dot com> ---
There's some problem with inserting an OI before an OI, which requires an OI
before it etc.
18: r98:OI=r99:OI
REG_DEAD r97:V4SI
Inserting insn reload before:
19: r99:OI=r97:V4SI#0
0 Non input pseudo reload: reject++
alt=0,overall=13,losers=2,rld_nregs=4
0 Non pseudo reload: reject++
alt=1,overall=7,losers=1,rld_nregs=2
0 Non input pseudo reload: reject++
1 Spill pseudo into memory: reject+=3
Using memory insn operand 1: reject+=3
alt=2,overall=19,losers=2 -- refuse
Choosing alt 1 in insn 19: (0) Utv (1) w {*aarch64_movoi}
Creating newreg=100, assigning class FP_REGS to r100
19: r99:OI=r100:OI
Inserting insn reload before:
20: r100:OI=r97:V4SI#0
>From gcc-bugs-return-666213-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jan 20 09:49:43 2020
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Subject: [Bug fortran/93263] [9/10 Regression] -fno-automatic and RECURSIVE
Date: Mon, 20 Jan 2020 09:49:00 -0000
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--- Comment #15 from Christophe Lyon <clyon at gcc dot gnu.org> ---
> Seen on arm too, both master and gcc-9
And aarch64 too.
>From gcc-bugs-return-666214-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jan 20 10:05:29 2020
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Subject: [Bug c++/93297] internal compiler error: in set_constraints, at cp/constraint.cc:
Date: Mon, 20 Jan 2020 10:05:00 -0000
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--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to fdlbxtqi from comment #3)
> (In reply to Martin Liška from comment #2)
> > Thanks for the report. Can you please send us the command line used for the
> > compilation? Ideally output of -v option.
>
> g++ -o xxx xxx.cc -Ofast -std=c++2a -s -msse2 -maes -msha
Fine and what tells gcc -v?
>From gcc-bugs-return-666215-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jan 20 10:09:07 2020
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Subject: [Bug tree-optimization/93326] switch optimisation of multiple jumptables into a lookup
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Last reconfirmed| |2020-01-20
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--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
I can take a look.
>From gcc-bugs-return-666216-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jan 20 10:11:44 2020
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Subject: [Bug tree-optimization/93199] [8/9 Regression] Compile time hog in sink_clobbers
Date: Mon, 20 Jan 2020 10:11:00 -0000
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--- Comment #25 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Martin Liska <marxin@gcc.gnu.org>:
https://gcc.gnu.org/g:92ce93c743b3c81f6911bc3d06056099369e9191
commit r10-6084-g92ce93c743b3c81f6911bc3d06056099369e9191
Author: Martin Liska <mliska@suse.cz>
Date: Mon Jan 20 11:10:30 2020 +0100
Record outer non-cleanup region in TREE EH.
PR tree-optimization/93199
* tree-eh.c (struct leh_state): Add
new field outer_non_cleanup.
(cleanup_is_dead_in): Pass leh_state instead
of eh_region. Add a checking that state->outer_non_cleanup
points to outer non-clean up region.
(lower_try_finally): Record outer_non_cleanup
for this_state.
(lower_catch): Likewise.
(lower_eh_filter): Likewise.
(lower_eh_must_not_throw): Likewise.
(lower_cleanup): Likewise.
>From gcc-bugs-return-666217-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jan 20 10:17:37 2020
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Subject: [Bug debug/92763] [8/9/10 Regression] ICE in dwarf2out_abstract_function, at dwarf2out.c:22659, or in force_type_die, at dwarf2out.c:26224
Date: Mon, 20 Jan 2020 10:17:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #3)
> So we're inlining A::omp declare reduction
> y~i(A::T&)::<lambda()>::operator() (const struct ._anon_1 * const __closure)
> which has no abstract origin.
>
> For the -fno-var-tracking-assignments case we are pruning the early DIE of
> the
> function as unused as part of prune_unused_types_prune while we don't when
> VTA is enabled. That's because:
>
> /* For -fvar-tracking-assignments, also set the mark on nodes that could be
> referenced by DW_TAG_call_site DW_AT_call_origin (i.e. direct call
> callees). */
> cgraph_node *cnode;
> FOR_EACH_FUNCTION (cnode)
> if (cnode->referred_to_p (false))
> {
> dw_die_ref die = lookup_decl_die (cnode->decl);
> if (die == NULL || die->die_mark)
> continue;
> for (cgraph_edge *e = cnode->callers; e; e = e->next_caller)
> if (e->caller != cnode
> && opt_for_fn (e->caller->decl, flag_var_tracking_assignments))
> {
> prune_unused_types_mark (die, 1);
> break;
> }
> }
>
> I'm not sure why this code shouldn't apply to DW_TAG_inlined_subroutine
> which is needed independently of -fvar-tracking-assignments ...
I think the reason for the -fvar-tracking-assignments check is, as the comment
says, to avoid pruning info that the call site info will need, and the call
site info is only emitted if -fvar-tracking-assignments. DW_TAG_call_site is
only emitted for the calls that remain as calls in the IL till the end, so if
something is inlined, that isn't a call.
we do not want
>From gcc-bugs-return-666218-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jan 20 10:18:10 2020
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Subject: [Bug c++/92536] [10 Regression] ICE when trying to using deduction guide following unknown type error
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--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Paolo Carlini <paolo@gcc.gnu.org>:
https://gcc.gnu.org/g:0757f0bbf3edf43a27ec3f7d2c33ab56f26eb15a
commit r10-6085-g0757f0bbf3edf43a27ec3f7d2c33ab56f26eb15a
Author: Paolo Carlini <paolo.carlini@oracle.com>
Date: Mon Jan 20 11:17:19 2020 +0100
Add testcase of PR c++/92536, already fixed.
PR c++/92536
* g++.dg/cpp1z/pr92536.C: New.
>From gcc-bugs-return-666220-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jan 20 10:18:46 2020
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Subject: [Bug c++/92536] [10 Regression] ICE when trying to using deduction guide following unknown type error
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Done.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/92955] [10 regression] gcc.dg/vect/pr60505.c fails starting with r279392
Date: Mon, 20 Jan 2020 10:18:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Status|WAITING |NEW
Component|testsuite |tree-optimization
--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
That does look like the same problem. I was also able to tweak the test case
so that it reproduces the spurious warning even with an x86_64-linux native
compiler:
$ cat pr92955.c && gcc -O3 -S -Wall pr92955.c
typedef struct S { unsigned char n, a[4]; } S;
void f (S *s, const unsigned char *p, const unsigned char *q)
{
long n;
for (n = 0; n < (s->n & 7); ++n);
if (p + (4 - n) > q)
while (p < q)
s->a[n++] = *p++;
}
pr92955.c: In function ‘f’:
pr92955.c:11:17: warning: writing 1 byte into a region of size 0
[-Wstringop-overflow=]
11 | s->a[n++] = *p++;
| ~~~~~~~~~~^~~~~~
pr92955.c:1:37: note: at offset [4, 11] to object ‘a’ with size 4 declared here
1 | typedef struct S { unsigned char n, a[4]; } S;
| ^
The loop is only unrolled at -O3. The dump below shows that the last unrolled
iteration accesses the member array at index 4, so it should be avoided
Compiling with -fno-unroll-loops doesn't show the warning.
This is very close to the problem in bug 60505 where the warning was
-Warray-bounds. The two warnings detect many of the same problems but
-Wstringop-overflow only detects out-of-bounds char stores and runs just a
little before -Warray-bounds so it gets first dibs on diagnosing those. With
the former suppressed via -Wno-stringop-overflow I would expect -Warray-bounds
to trigger for this test case but it doesn't, even though the IL is the same.
The false negative seems like a separate bug.
;; basic block 10, loop depth 0, count 27487790 (estimated locally), maybe
hot
;; prev block 9, next block 11, flags: (NEW, REACHABLE, VISITED)
;; pred: 9 [80.0% (guessed)] count:27487790 (estimated locally)
(TRUE_
VALUE,EXECUTABLE)
# PT = nonlocal
p_46 = p_39 + 1;
# RANGE [4, 11] NONZERO 15
n_47 = n_40 + 1; <<< n_47 is out of bounds here
# VUSE <.MEM_42>
_48 = *p_39;
# .MEM_49 = VDEF <.MEM_42>
s_15(D)->aD.2902[n_40] = _48;
if (q_17(D) > p_46)
goto <bb 11>; [80.00%]
else
goto <bb 5>; [20.00%]
;; succ: 11 [80.0% (guessed)] count:21990232 (estimated locally)
(TRUE
_VALUE,EXECUTABLE)
;; 5 [20.0% (guessed)] count:5497558 (estimated locally)
(FALSE_
VALUE,EXECUTABLE)
;; basic block 11, loop depth 0, count 21990232 (estimated locally), maybe
hot
;; prev block 10, next block 12, flags: (NEW, REACHABLE, VISITED)
;; pred: 10 [80.0% (guessed)] count:21990232 (estimated locally)
(TRUE
_VALUE,EXECUTABLE)
# PT = nonlocal
p_53 = p_46 + 1;
# RANGE [5, 12] NONZERO 15
n_54 = n_47 + 1;
# VUSE <.MEM_49>
_55 = *p_46;
# .MEM_56 = VDEF <.MEM_49>
s_15(D)->aD.2902[n_47] = _55; <<< n_47 is used here
>From gcc-bugs-return-666221-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jan 20 10:47:12 2020
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Subject: [Bug c++/93314] [8/9/10 Regression] Invalid use of non-static data member causes ICE in gimplify_expr
Date: Mon, 20 Jan 2020 10:47:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |msebor at gcc dot gnu.org,
| |rsandifo at gcc dot gnu.org
Known to work| |4.9.4
Summary|Invalid use of non-static |[8/9/10 Regression] Invalid
|data member causes ICE in |use of non-static data
|gimplify_expr |member causes ICE in
| |gimplify_expr
Known to fail| |10.0, 5.0
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed. Bisection points to r210692 committed into 4.10.0:
gcc/
* tree.def (VOID_CST): New.
* tree-core.h (TI_VOID): New.
* tree.h (void_node): New.
* tree.c (tree_node_structure_for_code, tree_code_size)
(iterative_hash_expr): Handle VOID_CST.
(build_common_tree_nodes): Initialize void_node.
gcc/c-family/
* c-common.h (CTI_VOID_ZERO, void_zero_node): Delete.
* c-common.c (c_common_nodes_and_builtins): Don't initialize
void_zero_node.
* c-pretty-print.c (pp_c_void_constant): New function.
(c_pretty_printer::constant, c_pretty_printer::primary_expression)
(c_pretty_printer::expression): Handle VOID_CST.
* cilk.c (extract_free_variables): Likewise.
* c-ubsan.c (ubsan_instrument_division, ubsan_instrument_shift)
(ubsan_instrument_vla): Use void_node instead of void_zero_node.
gcc/c/
* c-array-notation.c (expand_array_notations): Use void_node
instead of void_zero_node.
gcc/cp/
* cvt.c (convert_to_void): Use void_node instead of void_zero_node.
* cp-array-notation.c (replace_invariant_exprs): Likewise.
(expand_array_notation): Handle VOID_CST.
* error.c (dump_expr): Likewise.
* cxx-pretty-print.c (cxx_pretty_printer::primary_expression)
(cxx_pretty_printer::expression): Likewise.
(pp_cxx_new_expression): Use void_node instead of void_zero_node.
* decl.c (register_dtor_fn): Likewise.
* init.c (build_raw_new_expr, build_new_1, build_vec_init)
(build_delete, push_base_cleanups): Likewise.
* mangle.c (write_expression): Likewise.
* semantics.c (finish_break_stmt, empty_expr_stmt_p): Likewise.
* pt.c (tsubst_decl, tsubst_copy_and_build): Likewise.
(tsubst, tsubst_copy, build_non_dependent_expr): Handle VOID_CST.
* tree.c (cp_tree_equal): Likewise.
(build_dummy_object, is_dummy_object, stabilize_expr): Use void_node
instead of void_zero_node.
* typeck.c (check_return_expr): Likewise.
* typeck2.c (build_functional_cast): Likewise.
>From gcc-bugs-return-666222-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jan 20 10:53:24 2020
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From: "felix-gcc at fefe dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/93328] New: missed optimization opportunity in deserialization code
Date: Mon, 20 Jan 2020 10:53:00 -0000
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Bug ID: 93328
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code
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Deserialization code often deals with endianness and alignment. However, in
some cases, the protocol endianness is the same as the host endianness, and
your platform does not care about alignment or has an unaligned load
instruction. Take this code, for example:
unsigned int foo(const unsigned char* c) {
return c[0] + c[1]*0x100 + c[2]*0x10000 + c[3]*0x1000000;
}
On i386 or x86_64, this could just be compiled into a single load.
In fact, clang does compile this into a single load.
gcc however turns it into four loads and three shifts.
For some use cases this optimization could be a huge improvement. In fact, even
if the alignment does not match, this could be a huge improvement. The compiler
could turn it into an load + bswap.
In fact, clang does compile the big endian version into a load + bswap.
>From gcc-bugs-return-666223-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jan 20 11:01:52 2020
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Subject: [Bug tree-optimization/92955] [10 regression] gcc.dg/vect/pr60505.c fails starting with r279392
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--- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
An even simpler test case. Changing the index in g() to unsigned avoids the
warning.
$ cat pr92955.c && gcc -O3 -S -Wall pr92955.c
typedef struct S { unsigned char n, a[4]; } S;
void f (S *s, const unsigned char *p, int n)
{
int i = n < 0 ? 0 : n;
while (*p)
s->a[i++] = *p++; // no warning (good)
}
void g (S *s, const unsigned char *p, int n)
{
int i;
for (i = 0; i < n; ++i);
while (*p)
s->a[i++] = *p++; // spurious -Wstringop-overflow
}
pr92955.c: In function ‘g’:
pr92955.c:18:15: warning: writing 1 byte into a region of size 0
[-Wstringop-overflow=]
18 | s->a[i++] = *p++; // spurious -Wstringop-overflow
| ~~~~~~~~~~^~~~~~
pr92955.c:1:37: note: at offset [4, 2147483647] to object ‘a’ with size 4
declared here
1 | typedef struct S { unsigned char n, a[4]; } S;
| ^
>From gcc-bugs-return-666224-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jan 20 11:18:46 2020
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/92816] [10 Regression] 35% performance drop for 433.milc with -O2 -flto on znver1 since r278879
Date: Mon, 20 Jan 2020 11:18:00 -0000
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--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Jan Hubicka from comment #2)
> It does not reproduce for me on bdver1 and also it does not seem to
> reproduce at skylake (with generic tuning)
> https://lnt.opensuse.org/db_default/v4/SPEC/graph?highlight_run=8405&plot.
> 70=227.70.0
>
> So we need to profile it on zen...
Yes. Feel free to grab a free Zen machine (a non-LNT machine) we have at SUSE.
>From gcc-bugs-return-666225-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jan 20 11:25:11 2020
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From: "burnus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/93329] New: ICE in omp_code_to_statement, at fortran/openmp.c:5902
Date: Mon, 20 Jan 2020 11:25:00 -0000
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Bug ID: 93329
Summary: ICE in omp_code_to_statement, at fortran/openmp.c:5902
Product: gcc
Version: unknown
Status: UNCONFIRMED
Keywords: openacc, openmp
Severity: normal
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The following program fails when compiled with -fopenacc & -fopenacc
simultaneously:
$ gfortran-trunk -fopenmp -fopenacc -foffload=disable foo3.f90
f951: internal compiler error: in omp_code_to_statement, at
fortran/openmp.c:5902
0x5fc40b omp_code_to_statement
../../repos/gcc/gcc/fortran/openmp.c:5902
0x5fc40b omp_code_to_statement
../../repos/gcc/gcc/fortran/openmp.c:5875
0x8c77e4 resolve_omp_directive_inside_oacc_region
../../repos/gcc/gcc/fortran/openmp.c:5955
!-------------------------
!$acc kernels copyout(x)
!$omp target map(from:x)
x = 5
!$omp end target
!$acc end kernels
print *, 'hello', x
end
>From gcc-bugs-return-666226-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jan 20 11:46:36 2020
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Subject: [Bug tree-optimization/93328] missed optimization opportunity in deserialization code
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Status|UNCONFIRMED |NEW
Last reconfirmed| |2020-01-20
Component|rtl-optimization |tree-optimization
Version|unknown |10.0
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
The bswap pass doesn't handle multiplication or plus, if you write your
function using shifts and bitwise or we can optimize it.
Not to difficult to teach the pass the other forms I guess and a
canonicalization opportunity as well (as usual integer promotion rules make
things complicated).
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From: "burnus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/93330] New: CHARACTER: Wrong kind=4 resolution + missing string-length mismatch actual/dummy diagnostic
Date: Mon, 20 Jan 2020 11:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93330
Bug ID: 93330
Summary: CHARACTER: Wrong kind=4 resolution + missing
string-length mismatch actual/dummy diagnostic
Product: gcc
Version: unknown
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Keywords: accepts-invalid, diagnostic, rejects-valid
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Created attachment 47682
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47682&action=edit
Test case
Found when looking at the posted patch for PR 85781.
There are three issues:
* 4_"abc"(2:2) is wrongly converted to a kind-1 character → rejects-valid
* Passing a zero-length string to a nonzero-length dummy argument gives no
warning (or error). [Note: passing a len > 0 string does] → diagnostic
* Passing a too-long kind-4 character string should give an error/warning
but it does not. → diagnostic
One can argue whether a warning or an error is better; the standard has "shell"
but it is not a constraint.
* * *
Related: I wonder whether some -W option should also warn when passing a too
long string. While valid, it can be sometimes surprising if one passes some
argument – and it then gets truncated, e.g.
call foo('abc')
contains
subroutine foo(x)
character(len=2) :: x
print *, x
end
end
* * *
Fortran 2018 has in 15.5.2.4:
"The length type parameter values of a present actual argument shall agree with
the corresponding ones of the dummy argument that are not assumed, except for
the case of the character length parameter of an actual argument of type
character with default kind or C character kind (18.2.2) associated with a
dummy argument that is not assumed-shape or assumed-rank.
"If a present scalar dummy argument is of type character with default kind or C
character kind, the length len of the dummy argument shall be less than or
equal to the length of the actual argument. The dummy argument becomes
associated with the leftmost len characters of the actual argument. If a
present array dummy argument is of type character with default kind or C
character kind and is not assumed-shape or assumed-rank, it becomes associated
with the leftmost characters of the actual argument element sequence
(15.5.2.11)."
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Subject: [Bug tree-optimization/93327] Performance degradation of povray benchmark from gcc 8.3.1 to gcc 9.2.1
Date: Mon, 20 Jan 2020 11:50:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2020-01-20
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
453.povray doesn't exhibit this slowdown. Btw, cruical information is missing,
for example compiler options used.
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Subject: [Bug debug/92763] [8/9 Regression] ICE in dwarf2out_abstract_function, at dwarf2out.c:22659, or in force_type_die, at dwarf2out.c:26224
Date: Mon, 20 Jan 2020 11:57:00 -0000
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--- Comment #6 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Richard Guenther <rguenth@gcc.gnu.org>:
https://gcc.gnu.org/g:991b91497fd50f6e70e5f2c0cfa96e1b74157bdc
commit r10-6087-g991b91497fd50f6e70e5f2c0cfa96e1b74157bdc
Author: Richard Biener <rguenther@suse.de>
Date: Mon Jan 20 10:36:09 2020 +0100
debug/92763 keep DIEs that might be used in DW_TAG_inlined_subroutine
We were pruning type-local subroutine DIEs if their context is unused
despite us later needing those DIEs as abstract origins for inlines.
The patch makes code already present for -fvar-tracking-assignments
unconditional.
2020-01-20 Richard Biener <rguenther@suse.de>
PR debug/92763
* dwarf2out.c (prune_unused_types): Unconditionally mark
called function DIEs.
* g++.dg/debug/pr92763.C: New testcase.
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Subject: [Bug debug/92763] [8/9 Regression] ICE in dwarf2out_abstract_function, at dwarf2out.c:22659, or in force_type_die, at dwarf2out.c:26224
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |10.0
Summary|[8/9/10 Regression] ICE in |[8/9 Regression] ICE in
|dwarf2out_abstract_function |dwarf2out_abstract_function
|, at dwarf2out.c:22659, or |, at dwarf2out.c:22659, or
|in force_type_die, at |in force_type_die, at
|dwarf2out.c:26224 |dwarf2out.c:26224
Known to fail|10.0 |
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed on trunk sofar.
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Subject: [Bug target/93221] [10 Regression] ICE maximum number of generated reload insns per insn achieved (90) on aarch64
Date: Mon, 20 Jan 2020 12:02:00 -0000
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--- Comment #6 from Joel Hutton <joel.hutton at arm dot com> ---
The regression seems to be introduced by this commit:
commit 11b8091fb33c894cea20702d3e85389723987910
Author: Eric Botcazou <ebotcazou@adacore.com>
Date: Wed Dec 18 23:03:23 2019 +0000
* ira.c (ira): Use simple LRA algorithm when not optimizing.
From-SVN: r279550
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Subject: [Bug middle-end/93246] [8 Regression] Unexpected program behavior when -fsanitizedress and -O2/O3 used
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--- Comment #15 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-9 branch has been updated by Richard Guenther
<rguenth@gcc.gnu.org>:
https://gcc.gnu.org/g:20e9d78543493f2f6aeef19af4cea54696247fc8
commit r9-8147-g20e9d78543493f2f6aeef19af4cea54696247fc8
Author: Richard Biener <rguenther@suse.de>
Date: Tue Jan 14 08:43:32 2020 +0100
PR middle-end/93246 - missing alias subsets
Starting with the introduction of TYPE_TYPELESS_STORAGE the situation
of having a alias-set zero aggregate field became more common which
prevents recording alias-sets of fields of said aggregate as subset
of the outer aggregate. component_uses_parent_alias_set_from in the
past fended off some of the issues with that but the alias oracles
use of the alias set of the base of an access path never appropriately
handled it.
The following makes it so that alias-sets of fields of alias-set zero
aggregate fields are still recorded as subset of the container.
2020-01-14 Richard Biener <rguenther@suse.de>
PR middle-end/93246
* alias.c (record_component_aliases): Take superset to record
into, recurse for alias-set zero fields.
(record_component_aliases): New oveerload wrapping around the above.
* g++.dg/torture/pr93246.C: New testcase.
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* [Bug ipa/93318] [10 regression] Firefox LTO+FDO ICEs in speculative_call_info
[not found] <bug-93318-4@http.gcc.gnu.org/bugzilla/>
2020-01-19 23:09 ` [Bug ipa/93318] [10 regression] Firefox LTO+FDO ICEs in speculative_call_info hubicka at ucw dot cz
@ 2022-05-13 9:42 ` luoxhu at gcc dot gnu.org
2022-05-13 10:07 ` luoxhu at gcc dot gnu.org
2 siblings, 0 replies; 3+ messages in thread
From: luoxhu at gcc dot gnu.org @ 2022-05-13 9:42 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93318
luoxhu at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |luoxhu at gcc dot gnu.org
--- Comment #9 from luoxhu at gcc dot gnu.org ---
I have a testcase ICE at:
external/com_google_protobuf/src/google/protobuf/message_lite.h:515:68:
internal compiler error: Segmentation fault
0xde2816 crash_signal
../../gcc/toplev.c:328
0xe82370 copy_bb
../../gcc/tree-inline.c:2204
0xe84afa copy_cfg_body
../../gcc/tree-inline.c:3022
0xe855ea copy_body
../../gcc/tree-inline.c:3270
0xe8945b expand_call_inline
../../gcc/tree-inline.c:5061
0xe8a055 gimple_expand_calls_inline
../../gcc/tree-inline.c:5251
0xe8a831 optimize_inline_calls(tree_node*)
../../gcc/tree-inline.c:5424
0xb976ea inline_transform(cgraph_node*)
../../gcc/ipa-inline-transform.c:736
0xd1a147 execute_one_ipa_transform_pass
../../gcc/passes.c:2233
0xd1a2a1 execute_all_ipa_transforms(bool)
../../gcc/passes.c:2272
0x901809 cgraph_node::expand()
../../gcc/cgraphunit.c:2293
0x901e4a expand_all_functions
../../gcc/cgraphunit.c:2471
0x9028dd symbol_table::compile()
../../gcc/cgraphunit.c:2822
0x834fbc lto_main()
../../gcc/lto/lto.c:653
tree-inline.c:2204
2204: cgraph_edge *indirect = old_edge->speculative_call_indirect_edge ();
2205: profile_count indir_cnt = indirect->count;
the returned indirect is 0 caused assert on 2205.
(gdb) p old_edge->caller->debug()
_ZNK6google8protobuf11MessageLite23IsInitializedWithErrorsEv/15805768
(IsInitializedWithErrors) @0x7ffff6d44438
Type: function definition analyzed
Visibility: external public visibility_specified visibility:hidden
References: _ZNK4trpc15RequestProtocol13IsInitializedEv/15470318 (addr)
(speculative)
Referring:
Function IsInitializedWithErrors/15805768 is inline copy in
OnExtendedInfosReceive/3878638
Availability: local
Unit id: 1201
Function flags: count:26415 (adjusted) first_run:577 body local hot
Called by:
_ZN7yottadb2ds18BoundedReadWatcher22OnExtendedInfosReceiveERKSs/3878638
(inlined) (26415 (adjusted),1.00
per call) (can throw external)
Calls:
_ZNK6google8protobuf11MessageLite29LogInitializationErrorMessageEv/15806151 (0
(guessed),0.00 per call) (can
throw external)
_ZNK7yottadb2ds28AppendLogRequestExtendedInfo13IsInitializedEv.constprop.0/16350633
(speculative) (inl
ined) (12547 (adjusted),0.47 per call) (can throw external)
_ZNK7yottadb2ds28AppendLogRequestExtendedInfo13IsInitializ
edEv.constprop.0/16375492 (inlined) (indirect_inlining) (13868 (adjusted),0.52
per call) (can throw external)
$84 = void
(gdb) p old_edge->callee->debug()
_ZNK7yottadb2ds28AppendLogRequestExtendedInfo13IsInitializedEv.constprop.0/16350633
(IsInitialized.constprop) @0x7ffff
6d44b40
Type: function definition analyzed
Visibility: artificial
References:
Referring:
Read from file: db_server.ltrans32.o
Function IsInitialized.constprop/16350633 is inline copy in
OnExtendedInfosReceive/3878638
Availability: local
Unit id: 116
Function flags: count:12547 (adjusted) first_run:8235 body local icf_merged
nonfreeing_fn
Called by:
_ZNK6google8protobuf11MessageLite23IsInitializedWithErrorsEv/15805768
(speculative) (inlined) (12547 (adj
usted),0.47 per call) (can throw external)
Calls:
In wpa.079i.inline, it has TWO *polymorphic indirect call* speculative targets,
I wrote a case like it but passed.
_ZNK6google8protobuf11MessageLite23IsInitializedWithErrorsEv/15805768
(IsInitializedWithErrors) @0x7efdc479a2d0
Type: function definition analyzed
Visibility: prevailing_def_ironly
previous sharing asm name: 16375490
References: _ZNK4trpc15RequestProtocol13IsInitializedEv/15470318 (addr)
(speculative) _ZNK7yottadb3rpc17RunCommandRequest13IsInitializedEv/9954194
(addr) (speculative)
Referring:
Read from file:
bazel-out/k8-dbg/bin/external/com_google_protobuf/libprotobuf_lite.a
Availability: local
Profile id: 19598949
Unit id: 1200
Function flags: count:1072 (adjusted) first_run:577 local
Called by:
_ZN6google8protobuf11MessageLite9ParseFromILNS1_10ParseFlagsE1ESsEEbRKT0_/16456195
(1824663 (estimated locally),0.00 per call) (can throw external)
_ZN6google8protobuf11MessageLite9ParseFromILNS1_10ParseFlagsE1EPNS0_2io19ZeroCopyInputStreamEEEbRKT0_/15806727
(14 (adjusted),1.00 per call) (can throw external)
_ZN6google8protobuf11MessageLite9ParseFromILNS1_10ParseFlagsE1ESsEEbRKT0_/15806733
(1006 (adjusted),1.00 per call) (can throw external)
_ZN6google8protobuf11MessageLite9ParseFromILNS1_10ParseFlagsE1ENS0_11StringPieceEEEbRKT0_/15806735
(52 (precise),1.00 per call) (can throw external)
Calls:
_ZNK7yottadb2ds28AppendLogRequestExtendedInfo13IsInitializedEv.constprop.0/16365519
(speculative) (inlined) (456 (adjusted),0.43 per call) (can throw external)
_ZNK7yottadb2ds28AppendLogRequestExtendedInfo13IsInitializedEv.constprop.0/16365518
(speculative) (inlined) (509 (adjusted),0.47 per call) (can throw external)
_ZNK6google8protobuf11MessageLite29LogInitializationErrorMessageEv/15806151 (0
(guessed),0.00 per call) (can throw external)
Polymorphic indirect call of type const struct MessageLite
token:8(speculative) (106 (adjusted),0.10 per call) (can throw external) of
param:0 Num speculative call targets: 2
Outer type (dynamic):struct MessageLite (or a derived type) offset 0
The only other difference is IsInitialized.constprop is *indirect_inlining*
into caller, it seems NOT easy to reduce protobuf to a small case, any clue to
fix it? Thanks.
@Honza
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug ipa/93318] [10 regression] Firefox LTO+FDO ICEs in speculative_call_info
[not found] <bug-93318-4@http.gcc.gnu.org/bugzilla/>
2020-01-19 23:09 ` [Bug ipa/93318] [10 regression] Firefox LTO+FDO ICEs in speculative_call_info hubicka at ucw dot cz
2022-05-13 9:42 ` luoxhu at gcc dot gnu.org
@ 2022-05-13 10:07 ` luoxhu at gcc dot gnu.org
2 siblings, 0 replies; 3+ messages in thread
From: luoxhu at gcc dot gnu.org @ 2022-05-13 10:07 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93318
--- Comment #10 from luoxhu at gcc dot gnu.org ---
And the Profile id of that node is streamed to many objects after lto
partition:
grep -- "19598949" **
db_server.ltrans0.000i.cgraph: Profile id: 19598949
db_server.ltrans0.000i.cgraph: Profile id: 19598949
db_server.ltrans0.000i.cgraph: Profile id: 19598949
db_server.ltrans0.079i.inline: Profile id: 19598949
db_server.ltrans0.079i.inline: Profile id: 19598949
db_server.ltrans12.000i.cgraph: Profile id: 19598949
db_server.ltrans12.000i.cgraph: Profile id: 19598949
db_server.ltrans12.000i.cgraph: Profile id: 19598949
db_server.ltrans14.000i.cgraph: Profile id: 19598949
db_server.ltrans26.000i.cgraph: Profile id: 19598949
db_server.ltrans26.000i.cgraph: Profile id: 19598949
db_server.ltrans26.000i.cgraph: Profile id: 19598949
db_server.ltrans31.000i.cgraph: Profile id: 19598949
db_server.ltrans32.000i.cgraph: Profile id: 19598949
db_server.wpa.000i.cgraph: Profile id: 19598949
db_server.wpa.001i.lto-link: Profile id: 19598949
db_server.wpa.003i.lto-partition: Profile id: 19598949
db_server.wpa.070i.whole-program: Profile id: 19598949
db_server.wpa.071i.profile_estimate: Profile id: 19598949
db_server.wpa.072i.icf: Profile id: 19598949
db_server.wpa.073i.devirt: Profile id: 19598949
db_server.wpa.074i.cp: Profile id: 19598949
db_server.wpa.075i.sra: Profile id: 19598949
db_server.wpa.078i.fnsummary: Profile id: 19598949
db_server.wpa.079i.inline: Profile id: 19598949
db_server.wpa.080i.pure-const: Profile id: 19598949
db_server.wpa.080i.pure-const: Profile id: 19598949
db_server.wpa.080i.pure-const: Profile id: 19598949
db_server.wpa.080i.pure-const: Profile id: 19598949
db_server.wpa.082i.static-var: Profile id: 19598949
db_server.wpa.082i.static-var: Profile id: 19598949
^ permalink raw reply [flat|nested] 3+ messages in thread
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2020-01-19 23:09 ` [Bug ipa/93318] [10 regression] Firefox LTO+FDO ICEs in speculative_call_info hubicka at ucw dot cz
2022-05-13 9:42 ` luoxhu at gcc dot gnu.org
2022-05-13 10:07 ` luoxhu at gcc dot gnu.org
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