On Sat, Jul 29, 2023 at 11:55 AM haochen.jiang via Gcc-regression
<gcc-regress...@gcc.gnu.org> wrote:
>
> On Linux/x86_64,
>
> b9d7140c80bd3c7355b8291bb46f0895dcd8c3cb is the first bad commit
> commit b9d7140c80bd3c7355b8291bb46f0895dcd8c3cb
> Author: Jan Hubicka <j...@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
