[all-commits] [llvm/llvm-project] 15c830: [X86][SSE] Fold EXTEND_VECTOR_INREG(EXTEND_VECTOR_...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 15c8306056beefa61533a895e8d836db72fccd14
      https://github.com/llvm/llvm-project/commit/15c8306056beefa61533a895e8d836db72fccd14
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2020-09-20 (Sun, 20 Sep 2020)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/test/CodeGen/X86/masked_load.ll

  Log Message:
  -----------
  [X86][SSE] Fold EXTEND_VECTOR_INREG(EXTEND_VECTOR_INREG(X)) -> EXTEND_VECTOR_INREG(X)

It should be possible to make this generic, but we're not great at checking legality of *_EXTEND_VECTOR_INREG ops so I'm conservatively putting this inside X86ISelLowering.cpp