[Bug target/96857] New: [r11-1301 Regression] FAIL: gcc.target/i386/avx512bw-pr95488-1.c scan-assembler-times vpmullw[^\n]*zmm 2 on Linux/x86_64 (-m64 -march=cascadelake)

[Bug target/96857] New: [r11-1301 Regression] FAIL: gcc.target/i386/avx512bw-pr95488-1.c scan-assembler-times vpmullw[^\n]*zmm 2 on Linux/x86_64 (-m64 -march=cascadelake)

[crazylht at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96857

            Bug ID: 96857
           Summary: [r11-1301 Regression] FAIL:
                    gcc.target/i386/avx512bw-pr95488-1.c
                    scan-assembler-times vpmullw[^\n]*zmm 2 on
                    Linux/x86_64 (-m64 -march=cascadelake)
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: crazylht at gmail dot com
  Target Milestone: ---
            Target: x86_64-*-* i?86-*-*

On Linux/x86_64,

54cdb2f5a5b01a482d7cbce30e7b738558eecf59 is the first bad commit commit
54cdb2f5a5b01a482d7cbce30e7b738558eecf59
Author: liuhongt <hongtao.liu@intel.com>
Date:   Wed Jun 3 17:25:47 2020 +0800

    Optimize multiplication for V8QI,V16QI,V32QI under TARGET_AVX512BW.

caused

FAIL: gcc.target/i386/avx512bw-pr95488-1.c scan-assembler-times vpmovwb 2
FAIL: gcc.target/i386/avx512bw-pr95488-1.c scan-assembler-times vpmovzxbw 4
FAIL: gcc.target/i386/avx512bw-pr95488-1.c scan-assembler-times
vpmullw[^\n]*zmm 2

with GCC configured with

../../gcc/configure
--prefix=/local/skpandey/gccwork/toolwork/gcc-bisect-master/master/r11-1301/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/avx512bw-pr95488-1.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)

[Bug target/96857] [11 Regression] FAIL: gcc.target/i386/avx512bw-pr95488-1.c scan-assembler-times vpmullw[^\n]*zmm 2 on Linux/x86_64 (-m64 -march=cascadelake)

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96857

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[r11-1301 Regression] FAIL: |[11 Regression] FAIL:
                   |gcc.target/i386/avx512bw-pr |gcc.target/i386/avx512bw-pr
                   |95488-1.c                   |95488-1.c
                   |scan-assembler-times        |scan-assembler-times
                   |vpmullw[^\n]*zmm 2 on       |vpmullw[^\n]*zmm 2 on
                   |Linux/x86_64 (-m64          |Linux/x86_64 (-m64
                   |-march=cascadelake)         |-march=cascadelake)
   Target Milestone|---                         |11.0

[Bug target/96857] [11 Regression] FAIL: gcc.target/i386/avx512bw-pr95488-1.c scan-assembler-times vpmullw[^\n]*zmm 2 on Linux/x86_64 (-m64 -march=cascadelake)

[crazylht at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96857

--- Comment #1 from Hongtao.liu <crazylht at gmail dot com> ---
r11-1301-54cdb2f5a5b01a482d7cbce30e7b738558eecf59

[Bug target/96857] [11 Regression] FAIL: gcc.target/i386/avx512bw-pr95488-1.c scan-assembler-times vpmullw[^\n]*zmm 2 on Linux/x86_64 (-m64 -march=cascadelake)

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96857

--- Comment #2 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by hongtao Liu <liuhongt@gcc.gnu.org>:

https://gcc.gnu.org/g:8bd5530bfa136663f1fa79e9a1d3932b5adf15bd

commit r11-2990-g8bd5530bfa136663f1fa79e9a1d3932b5adf15bd
Author: liuhongt <hongtao.liu@intel.com>
Date:   Mon Aug 31 10:54:13 2020 +0800

    Adjust testcase.

    gcc/testsuite/ChangeLog:
            PR target/96246
            PR target/96855
            PR target/96856
            PR target/96857
            * g++.target/i386/avx512bw-pr96246-2.C: Add runtime check for
            AVX512BW.
            * g++.target/i386/avx512vl-pr96246-2.C: Add runtime check for
            AVX512BW and AVX512VL
            * g++.target/i386/avx512f-helper.h: New header.
            * gcc.target/i386/pr92658-avx512f.c: Add
            -mprefer-vector-width=512 to avoid impact of different default
            mtune which gcc is built with.
            * gcc.target/i386/avx512bw-pr95488-1.c: Ditto.
            * gcc.target/i386/pr92645-4.c: Add -mno-avx512f to avoid
            impact of different default march which gcc is built with.

[Bug target/96857] [11 Regression] FAIL: gcc.target/i386/avx512bw-pr95488-1.c scan-assembler-times vpmullw[^\n]*zmm 2 on Linux/x86_64 (-m64 -march=cascadelake)

[crazylht at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96857

Hongtao.liu <crazylht at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |FIXED

--- Comment #3 from Hongtao.liu <crazylht at gmail dot com> ---
Should be fixed in GCC11.