[all-commits] [llvm/llvm-project] 561c52: [RISCV] Extend vp.reverse vp.load/vp.store combine...

[Luke Lau via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 561c528b5e1900d41aeef506dfb632a66b3b9d51
      https://github.com/llvm/llvm-project/commit/561c528b5e1900d41aeef506dfb632a66b3b9d51
  Author: Luke Lau <luke at igalia.com>
  Date:   2026-05-29 (Fri, 29 May 2026)

  Changed paths:
    M llvm/include/llvm/CodeGen/SDPatternMatch.h
    M llvm/lib/Target/RISCV/RISCVISelLowering.cpp
    M llvm/test/CodeGen/RISCV/rvv/vp-combine-reverse-load.ll
    M llvm/test/CodeGen/RISCV/rvv/vp-combine-store-reverse.ll

  Log Message:
  -----------
  [RISCV] Extend vp.reverse vp.load/vp.store combine to non-VP splice + reverse (#180907)

As part of #172961, we can replace vp.reverse with
vector.splice.right(reverse(X), poison, EVL). This extends the existing
vp.reverse(vp.load) -> vp.strided.load stride=-1 and
vp.store(vp.reverse) -> vp.strided.store stride=-1 combines to also
handle the splice form.

It adds a pattern match helper to match both vp.reverse and
vector.splice.right. If vp.reverse is removed in future, then this
pattern match helper can be removed.



To unsubscribe from these emails, change your notification settings at https://github.com/llvm/llvm-project/settings/notifications