Re: [r14-5579 Regression] FAIL: gcc.dg/tree-ssa/ssa-lim-11.c scan-tree-dump-times lim2 "Executing store motion of __gcov0.access_buf\\[[12]\\] from loop 1" 2 on Linux/x86_64

[Sebastian Huber]

On 26.11.23 12:18, haochen.jiang wrote:

On Linux/x86_64,

20a3c74c347429c109bc7002285b735be83f6a0b is the first bad commit
commit 20a3c74c347429c109bc7002285b735be83f6a0b
Author: Sebastian Huber
Date:   Tue Nov 14 21:36:51 2023 +0100

 gcov: Improve -fprofile-update=atomic

caused

FAIL: gcc.dg/tree-ssa/ssa-lim-11.c scan-tree-dump-times lim2 "Executing
store motion of __gcov0.access_buf\\[[12]\\] from loop 1" 2


This error was fixed by:

commit 8674d70ce37ca3249a641fb418c6849d4f95f348
Author: Sebastian Huber 
Date:   Thu Nov 23 14:45:50 2023 +0100

gcov: No atomic ops for -fprofile-update=single

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[r14-5579 Regression] FAIL: gcc.dg/tree-ssa/ssa-lim-11.c scan-tree-dump-times lim2 "Executing store motion of __gcov0.access_buf\\[[12]\\] from loop 1" 2 on Linux/x86_64

[haochen.jiang]

On Linux/x86_64,

20a3c74c347429c109bc7002285b735be83f6a0b is the first bad commit
commit 20a3c74c347429c109bc7002285b735be83f6a0b
Author: Sebastian Huber 
Date:   Tue Nov 14 21:36:51 2023 +0100

gcov: Improve -fprofile-update=atomic

caused

FAIL: gcc.dg/tree-ssa/ssa-lim-11.c scan-tree-dump-times lim2 "Executing store 
motion of __gcov0.access_buf\\[[12]\\] from loop 1" 2

with GCC configured with

../../gcc/configure 
--prefix=/export/users/haochenj/src/gcc-bisect/master/master/r14-5579/usr 
--enable-clocale=gnu --with-system-zlib --with-demangler-in-ld 
--with-fpmath=sse --enable-languages=c,c++,fortran --enable-cet --without-isl 
--enable-libmpx x86_64-linux --disable-bootstrap

To reproduce:

$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="tree-ssa.exp=gcc.dg/tree-ssa/ssa-lim-11.c 
--target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="tree-ssa.exp=gcc.dg/tree-ssa/ssa-lim-11.c 
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="tree-ssa.exp=gcc.dg/tree-ssa/ssa-lim-11.c 
--target_board='unix{-m64}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="tree-ssa.exp=gcc.dg/tree-ssa/ssa-lim-11.c 
--target_board='unix{-m64\ -march=cascadelake}'"

(Please do not reply to this email, for question about this report, contact me 
at haochen dot jiang at intel.com.)
(If you met problems with cascadelake related, disabling AVX512F in command 
line might save that.)
(However, please make sure that there is no potential problems with AVX512.)