[Bug tree-optimization/54803] Rotates are not vectorized

[miyuki at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=54803

Mikhail Maltsev <miyuki at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |miyuki at gcc dot gnu.org

--- Comment #4 from Mikhail Maltsev <miyuki at gcc dot gnu.org> ---
On x86_64 the testcase is also vectorized. For example, with -O3
-march=haswell:

.L9:
        vmovdqa (%r9,%rax), %ymm0
        addq    $1, %r8
        vpsrlq  $32, %ymm0, %ymm1
        vpsllq  $32, %ymm0, %ymm0
        vpor    %ymm0, %ymm1, %ymm0
        vmovdqa %ymm0, (%r9,%rax)
        addq    $32, %rax
        cmpq    %r8, %rcx
        ja      .L9

On bdver2 vprotq insn is used:

.L14:
        incq    %rcx
        vprotq  $32, (%rax,%r8), %xmm0
        vmovaps %xmm0, (%rdx,%r8)
        addq    $16, %r8
        cmpq    %r10, %rcx
        jb      .L14