llvm-project

7866fc2b - [RISCV] Rewrite vrgather.vx undef, (vmv.s.x), 0, v0 as vmv.v.x (#136010)

[RISCV] Rewrite vrgather.vx undef, (vmv.s.x), 0, v0 as vmv.v.x (#136010) This extends the DAG combine introduced in 336b2909 to handle the case where the prior value is defined by a vmv.s.x instead of a vmv.v.x. If the vrgather splats the single source element, and has no passthru we can replace it with a vmv.v.x - which will in turn usually get folded into a vmerge if a select follows.