[PATCH] D54615: RegisterCoalescer: Defer clearing implicit_def lanes

[Matt Arsenault via Phabricator via llvm-commits]

arsenm updated this revision to Diff 174326.
arsenm added a comment.

Add testcase for the second case where ErasableImplicitDef is cleared, although the used lanes don't matter


https://reviews.llvm.org/D54615

Files:
  lib/CodeGen/RegisterCoalescer.cpp
  test/CodeGen/AMDGPU/regcoalesce-keep-valid-lanes-implicit-def-bug39602.mir

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