[Bug middle-end/100267] gcc -O2 for avx512 instrincts generates extra warnings and less optimizations

[crazylht at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100267

--- Comment #8 from Hongtao.liu <crazylht at gmail dot com> ---
"less optimizations" part should be fixed in GCC12. 


        .file   "test.c"
        .text
        .p2align 4
        .globl  dummyf1_avx512x8
        .type   dummyf1_avx512x8, @function
dummyf1_avx512x8:
.LFB5668:
        .cfi_startproc
        movl    (%rdi), %edx
        movq    8(%rdi), %rax
        vmovdqu (%rax,%rdx,8), %ymm0
        vmovdqu 32(%rax,%rdx,8), %ymm1
        vpaddq  %ymm1, %ymm0, %ymm0
        ret
        .cfi_endproc
.LFE5668:
        .size   dummyf1_avx512x8, .-dummyf1_avx512x8
        .ident  "GCC: (GNU) 12.0.0 20210621 (experimental)"
        .section        .note.GNU-stack,"",@progbits