Re: [r14-2314 Regression] FAIL: gcc.target/i386/pr100711-2.c scan-assembler-times vpandn 8 on Linux/x86_64

[Jan Beulich <jbeulich@suse.com>]

On 06.07.2023 13:57, haochen.jiang wrote:
> On Linux/x86_64,
> 
> e007369c8b67bcabd57c4fed8cff2a6db82e78e6 is the first bad commit
> commit e007369c8b67bcabd57c4fed8cff2a6db82e78e6
> Author: Jan Beulich <jbeulich@suse.com>
> Date:   Wed Jul 5 09:49:16 2023 +0200
> 
>     x86: yet more PR target/100711-like splitting
> 
> caused
> 
> FAIL: gcc.target/i386/pr100711-1.c scan-assembler-times pandn 2
> FAIL: gcc.target/i386/pr100711-2.c scan-assembler-times vpandn 8

I expect the same applies here - -mno-avx512f (or -mno-avx512vl) might
address this failure. But whether that's really the way to go I'm not
sure of. Plus of course such adjustments should have been done ahead
of time, when it was decided that testing with certain -march= settings
is a goal. My changes have merely uncovered the prior omissions.

Jan

> with GCC configured with
> 
> ../../gcc/configure --prefix=/export/users/haochenj/src/gcc-bisect/master/master/r14-2314/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="i386.exp=gcc.target/i386/pr100711-1.c --target_board='unix{-m32\ -march=cascadelake}'"
> $ cd {build_dir}/gcc && make check RUNTESTFLAGS="i386.exp=gcc.target/i386/pr100711-2.c --target_board='unix{-m32\ -march=cascadelake}'"
> 
> (Please do not reply to this email, for question about this report, contact me at haochen dot jiang at intel.com)