[PATCH] D109858: [GlobalISel][AMDGPU] Add dead code elimination clean up after legalization.

[Jay Foad via Phabricator via llvm-commits]

foad added a comment.

What is the compile time impact of this vs D109154 <https://reviews.llvm.org/D109154>? I'm assuming they are both equally effective at cleaning up the dead code.

If we're going to go with this approach, should we clean up legalizeMachineFunction by ripping out all the bottom-up RPO order stuff, and the on-the-fly (presumably expensive) isTriviallyDead calls?


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D109858/new/

https://reviews.llvm.org/D109858