Re: [PATCH] i386: Avoid paradoxical subreg dests in vector zero_extend

On Tue, Oct 24, 2023 at 12:08 PM Richard Sandiford wrote: > > For the V2HI -> V2SI zero extension in: > > typedef unsigned short v2hi __attribute__((vector_size(4))); > typedef unsigned int v2si __attribute__((vector_size(8))); > v2si f (v2hi x) { return (v2si) {x[0], x[1]}; } > > ix86_expan

[PATCH] i386: Avoid paradoxical subreg dests in vector zero_extend

For the V2HI -> V2SI zero extension in: typedef unsigned short v2hi __attribute__((vector_size(4))); typedef unsigned int v2si __attribute__((vector_size(8))); v2si f (v2hi x) { return (v2si) {x[0], x[1]}; } ix86_expand_sse_extend would generate: (set (reg:V2HI 102) (const_vecto