[r11-5839 Regression] FAIL: gcc.target/i386/pr78102.c scan-assembler-times pcmpeqq 3 on Linux/x86_64

[Prathamesh Kulkarni]

On Wed, 9 Dec 2020 at 00:29, sunil.k.pandey <skpandey@sc.intel.com> wrote:
>
> On Linux/x86_64,
>
> 3a6e3ad38a17a03ee0139b49a0946e7b9ded1eb1 is the first bad commit
> commit 3a6e3ad38a17a03ee0139b49a0946e7b9ded1eb1
> Author: Prathamesh Kulkarni <prathamesh.kulkarni@linaro.org>
> Date:   Tue Dec 8 14:30:04 2020 +0530
>
>     gimple-isel: Fold x CMP y ? -1 : 0 to x CMP y [PR97872]
>
> caused
>
> FAIL: gcc.target/i386/pr78102.c scan-assembler-times pcmpeqq 3
Hi,
This is a known issue with the patch, and discussed here:
https://gcc.gnu.org/pipermail/gcc/2020-December/234438.html
I guess Hongtao will check in a fix for that soon.

Thanks,
Prathamesh
>
> with GCC configured with
>
> ../../gcc/configure --prefix=/local/skpandey/gccwork/toolwork/gcc-bisect-master/master/r11-5839/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/pr78102.c --target_board='unix{-m32}'"
> $ cd {build_dir}/gcc && make check RUNTESTFLAGS="i386.exp=gcc.target/i386/pr78102.c --target_board='unix{-m32\ -march=cascadelake}'"
> $ cd {build_dir}/gcc && make check RUNTESTFLAGS="i386.exp=gcc.target/i386/pr78102.c --target_board='unix{-m64}'"
> $ cd {build_dir}/gcc && make check RUNTESTFLAGS="i386.exp=gcc.target/i386/pr78102.c --target_board='unix{-m64\ -march=cascadelake}'"
>
> (Please do not reply to this email, for question about this report, contact me at skpgkp2 at gmail dot com)