[PATCH] D98401: [CodeGen] Fix backward copy propagation with -g

[yshui via Phabricator via llvm-commits]

yshui added a comment.

I think it might be valuable to extend this to all cases like this:

  $reg1 = ...
  USE $reg1
  ... // No writes to $reg1, and no reads of or writes to $reg2
  $reg2 = COPY killed $reg

Which can be rewritten to

  $reg2 = ...
  USE $reg2
  ...

Does this idea make sense? I am currently working on a patch that does this.


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D98401/new/

https://reviews.llvm.org/D98401