[r14-2834 Regression] FAIL: gcc.target/i386/pr87007-5.c scan-assembler-times vxorps[^\n\r]*xmm[0-9] 1 on Linux/x86_64

[r14-2834 Regression] FAIL: gcc.target/i386/pr87007-5.c scan-assembler-times vxorps[^\n\r]*xmm[0-9] 1 on Linux/x86_64

[haochen.jiang]

On Linux/x86_64,

b9d7140c80bd3c7355b8291bb46f0895dcd8c3cb is the first bad commit
commit b9d7140c80bd3c7355b8291bb46f0895dcd8c3cb
Author: Jan Hubicka <jh@suse.cz>
Date:   Fri Jul 28 09:16:09 2023 +0200

    loop-split improvements, part 1

caused

FAIL: gcc.target/i386/pr87007-4.c scan-assembler-times vxorps[^\n\r]*xmm[0-9] 1
FAIL: gcc.target/i386/pr87007-5.c scan-assembler-times vxorps[^\n\r]*xmm[0-9] 1

with GCC configured with

../../gcc/configure --prefix=/export/users/haochenj/src/gcc-bisect/master/master/r14-2834/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/pr87007-4.c --target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="i386.exp=gcc.target/i386/pr87007-4.c --target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="i386.exp=gcc.target/i386/pr87007-4.c --target_board='unix{-m64}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="i386.exp=gcc.target/i386/pr87007-4.c --target_board='unix{-m64\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="i386.exp=gcc.target/i386/pr87007-5.c --target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="i386.exp=gcc.target/i386/pr87007-5.c --target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="i386.exp=gcc.target/i386/pr87007-5.c --target_board='unix{-m64}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="i386.exp=gcc.target/i386/pr87007-5.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.)

Re: [r14-2834 Regression] FAIL: gcc.target/i386/pr87007-5.c scan-assembler-times vxorps[^\n\r]*xmm[0-9] 1 on Linux/x86_64

[Hongtao Liu]

On Sat, Jul 29, 2023 at 11:55 AM haochen.jiang via Gcc-regression
<gcc-regression@gcc.gnu.org> wrote:
>
> On Linux/x86_64,
>
> b9d7140c80bd3c7355b8291bb46f0895dcd8c3cb is the first bad commit
> commit b9d7140c80bd3c7355b8291bb46f0895dcd8c3cb
> Author: Jan Hubicka <jh@suse.cz>
> Date:   Fri Jul 28 09:16:09 2023 +0200
>
>     loop-split improvements, part 1
>
> caused
>
> FAIL: gcc.target/i386/pr87007-4.c scan-assembler-times vxorps[^\n\r]*xmm[0-9] 1
> FAIL: gcc.target/i386/pr87007-5.c scan-assembler-times vxorps[^\n\r]*xmm[0-9] 1
>
> with GCC configured with
I'll adjust testcase for this one.
Now we have
vpbroadcastd %ecx, %xmm0
vpaddd .LC3(%rip), %xmm0, %xmm0
vpextrd $3, %xmm0, %eax
vmovddup %xmm3, %xmm0
vrndscalepd $9, %xmm0, %xmm0
vunpckhpd %xmm0, %xmm0, %xmm3

for vrndscalepd, no need to insert pxor since it reuses input operand
xmm0 which loads from memory.
>
> ../../gcc/configure --prefix=/export/users/haochenj/src/gcc-bisect/master/master/r14-2834/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/pr87007-4.c --target_board='unix{-m32}'"
> $ cd {build_dir}/gcc && make check RUNTESTFLAGS="i386.exp=gcc.target/i386/pr87007-4.c --target_board='unix{-m32\ -march=cascadelake}'"
> $ cd {build_dir}/gcc && make check RUNTESTFLAGS="i386.exp=gcc.target/i386/pr87007-4.c --target_board='unix{-m64}'"
> $ cd {build_dir}/gcc && make check RUNTESTFLAGS="i386.exp=gcc.target/i386/pr87007-4.c --target_board='unix{-m64\ -march=cascadelake}'"
> $ cd {build_dir}/gcc && make check RUNTESTFLAGS="i386.exp=gcc.target/i386/pr87007-5.c --target_board='unix{-m32}'"
> $ cd {build_dir}/gcc && make check RUNTESTFLAGS="i386.exp=gcc.target/i386/pr87007-5.c --target_board='unix{-m32\ -march=cascadelake}'"
> $ cd {build_dir}/gcc && make check RUNTESTFLAGS="i386.exp=gcc.target/i386/pr87007-5.c --target_board='unix{-m64}'"
> $ cd {build_dir}/gcc && make check RUNTESTFLAGS="i386.exp=gcc.target/i386/pr87007-5.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.)



-- 
BR,
Hongtao