[Bug rtl-optimization/71956] [7 Regression] 176.gcc fails on 32 bits when compiled with -march=core-avx2

[ysrumyan at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71956

Yuri Rumyantsev <ysrumyan at gmail dot com> changed:

           What    |Removed                     |Added
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                 CC|                            |ysrumyan at gmail dot com

--- Comment #2 from Yuri Rumyantsev <ysrumyan at gmail dot com> ---
Jakub,

I removed both your revisions in cse.c (c1) but it did not help - 176.gcc stll
gets RF on avx2 but not on avx. I assume that masked stores are responsible for
it since we have them in binaries:

.L2437:
        vmovd   %ecx, %xmm1
        vpxor   %xmm5, %xmm5, %xmm5
        addl    -40(%ebp), %eax
        movl    -28(%ebp), %edx
        vpbroadcastd    -36(%ebp), %ymm4
        vpaddd  .LC1, %ymm4, %ymm2
        vpbroadcastd    %xmm1, %ymm1
        leal    (%edx,%eax,4), %eax
        vpsrlvd %ymm2, %ymm1, %ymm2
        vpaddd  %ymm7, %ymm4, %ymm3
        vpand   %ymm6, %ymm2, %ymm2
        vpcmpeqd        %ymm5, %ymm2, %ymm2
        vpcmpeqd        %ymm5, %ymm2, %ymm2
        vptest  %ymm2, %ymm2
        je      .L2446
        vpmaskmovd      %ymm0, %ymm2, (%eax)
.L2446:
        vpsrlvd %ymm3, %ymm1, %ymm2
        vpxor   %xmm3, %xmm3, %xmm3
        leal    32(%eax), %edx
        vpaddd  .LC3, %ymm4, %ymm4
        vpand   %ymm6, %ymm2, %ymm2
        vpcmpeqd        %ymm3, %ymm2, %ymm2
        vpcmpeqd        %ymm3, %ymm2, %ymm2
        vptest  %ymm2, %ymm2
        je      .L2447
        vpmaskmovd      %ymm0, %ymm2, (%edx)

Will try to determine the correct revision responsible for it.