[PATCH] D64766: [AMDGPU] Enable merging m0 initializations.

[Austin Kerbow via Phabricator via llvm-commits]

kerbowa created this revision.
kerbowa added reviewers: rampitec, arsenm.
Herald added subscribers: llvm-commits, hiraditya, t-tye, tpr, dstuttard, yaxunl, nhaehnle, wdng, jvesely, kzhuravl.
Herald added a project: LLVM.

Enable hoisting and merging m0 defs that are initialized with the
same immediate value. Fixes bug where removed instructions are
not consider to interfere with other inits, and make sure to not
host inits before block prologs.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D64766

Files:
  llvm/lib/Target/AMDGPU/SIFixSGPRCopies.cpp
  llvm/test/CodeGen/AMDGPU/merge-m0.mir

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