[PATCH] D113017: [AMDGPU] Avoid copying dead subregisters in copyPhysReg

[Jay Foad via Phabricator via llvm-commits]

foad added a comment.

Some stats from compiling a corpus of 10,000 graphics shaders:

- 57 of them (mostly compute shaders) actually have some redundant mov instructions removed
- 2,000 of them have other codegen differences due to post-ra scheduling being less constrained
- average compile time is slower by 0.7%


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D113017/new/

https://reviews.llvm.org/D113017