[all-commits] [llvm/llvm-project] cf75e8: [InstCombine] replace zombie unreachable values wi...

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  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: cf75e83275d16f9172fa5ab448a981afdadd34d0
      https://github.com/llvm/llvm-project/commit/cf75e83275d16f9172fa5ab448a981afdadd34d0
  Author: Sanjay Patel <spatel at rotateright.com>
  Date:   2020-09-20 (Sun, 20 Sep 2020)

  Changed paths:
    M llvm/lib/Transforms/InstCombine/InstructionCombining.cpp
    M llvm/test/Transforms/InstCombine/phi.ll

  Log Message:
  -----------
  [InstCombine] replace zombie unreachable values with 'undef' before erasing

The test (currently crashing) is reduced from the example provided
in the post-commit discussion in D87149.

Differential Revision: https://reviews.llvm.org/D87965