[all-commits] [llvm/llvm-project] 78270c: [UndefOrPoison] [CompileTime] Avoid IDom walk unle...

[annamthomas via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 78270cb81bded99bebc6fd8d515bf7cbeff62db4
      https://github.com/llvm/llvm-project/commit/78270cb81bded99bebc6fd8d515bf7cbeff62db4
  Author: annamthomas <anna at azul.com>
  Date:   2024-05-01 (Wed, 01 May 2024)

  Changed paths:
    M llvm/lib/Analysis/ValueTracking.cpp

  Log Message:
  -----------
  [UndefOrPoison] [CompileTime] Avoid IDom walk unless required. NFC (#90092)

If the value is not boolean and we are checking for `Undef` or
`UndefOrPoison`, we can avoid the potentially expensive IDom walk.
    
This should improve compile time for isGuaranteedNotToBeUndefOrPoison
and isGuaranteedNotToBeUndef.



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