Re: [PATCH] RISC-V: Optimize SELECT_VL codegen when length is known as smaller than VF

On 12/19/23 23:55, Juzhe-Zhong wrote: While trying to fix bugs of PR113097, notice this following situation we generate redundant vsetvli _255 = SELECT_VL (3, POLY_INT_CST [4, 4]); COND_LEN (..., _255) Before this patch: vsetivli a5, 3... ... vadd.vv (use a5) After this patch: ... vadd.vv

[PATCH] RISC-V: Optimize SELECT_VL codegen when length is known as smaller than VF

While trying to fix bugs of PR113097, notice this following situation we generate redundant vsetvli _255 = SELECT_VL (3, POLY_INT_CST [4, 4]); COND_LEN (..., _255) Before this patch: vsetivli a5, 3... ... vadd.vv (use a5) After this patch: ... vadd.vv (use AVL = 3) The reason we can do this i