[PATCH] D59412: [X86] X86ISelLowering::combineSextInRegCmov(): also handle i8 CMOV's

[Roman Lebedev via Phabricator via llvm-commits]

lebedev.ri created this revision.
lebedev.ri added reviewers: craig.topper, andreadb.
lebedev.ri added a project: LLVM.

As noted by @andreadb in https://reviews.llvm.org/D59035#inline-525780

If we have `sext ([trunc] (cmov C0, C1))`, we can instead do `cmov (sext ([trunc] (C0))), (sext ([trunc] (C1)))`


Repository:
  rL LLVM

https://reviews.llvm.org/D59412

Files:
  lib/Target/X86/X86ISelLowering.cpp
  test/CodeGen/X86/cmov-promotion.ll

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