[PATCH] D82258: [RegisterCoalescer] Fix IMPLICIT_DEF init removal for a register on joining

[Valery Pykhtin via Phabricator via llvm-commits]

vpykhtin added a comment.

HI Quentin,

Let A and B registers are about to be joined and at some point we met:

undef A.sub0 = <some value>
...
B.sub1 = IMPLICIT_DEF

Why would we need to keep this impdef?


Repository:
  rG LLVM Github Monorepo

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https://reviews.llvm.org/D82258