On Sat, Feb 13, 2021 at 09:59:57AM +0100, Uros Bizjak wrote:
> BTW: I wonder if this optimization triggers frequently, the code in
> the PR looks quite useful.
On my next bootstrap/regtest I can gather some statistics.
Jakub
On Sat, Feb 13, 2021 at 9:47 AM Jakub Jelinek wrote:
>
> Hi!
>
> Since the x86 backend enabled V2SImode vectorization (with
> TARGET_MMX_WITH_SSE), slp vectorization can kick in and emit
> movq(%rdi), %xmm1
> pshufd $225, %xmm1, %xmm0
> movq%xmm0, (%rdi)
> instead
Hi!
Since the x86 backend enabled V2SImode vectorization (with
TARGET_MMX_WITH_SSE), slp vectorization can kick in and emit
movq(%rdi), %xmm1
pshufd $225, %xmm1, %xmm0
movq%xmm0, (%rdi)
instead of
rolq$32, (%rdi)
we used to emit (or emit when slp vector
