Re: [PATCH] i386: Disable ix86_expand_vecop_qihi2 when !TARGET_AVX512BW

On Tue, May 21, 2024 at 8:16 AM Haochen Jiang wrote: > > Hi all, > > Since vpermq is really slow, we should avoid using it when it is > the only instruction could be used for ix86_expand_vecop_qihi2. > > Bootstrapped and regtested on x86_64-pc-linux-gnu. Ok for trunk? > > Thx, > Haochen > > gcc/Ch

Re: [PATCH 2/2] [x86] Adjust rtx_cost for MEM to enable more simplication

On Tue, May 21, 2024 at 7:13 AM liuhongt wrote: > > For CONST_VECTOR_DUPLICATE_P in constant_pool, it is just broadcast or > variants in ix86_vector_duplicate_simode_const. > Adjust the cost to COSTS_N_INSNS (2) + speed which should be a little > bit larger than broadcast. > > Bootstrapped and reg

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