[PATCH] D140537: SIInsertWait: Skip tied source of d16 buffer instruction

[Ruiling, Song via Phabricator via llvm-commits]

ruiling created this revision.
ruiling added reviewers: arsenm, foad.
Herald added subscribers: kosarev, kerbowa, hiraditya, jvesely.
Herald added a project: All.
ruiling requested review of this revision.
Herald added subscribers: llvm-commits, wdng.
Herald added a project: LLVM.

The instruction does not read the tied source, so we can skip it when
analyzing the dependency.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D140537

Files:
  llvm/lib/Target/AMDGPU/SIInsertWaitcnts.cpp
  llvm/test/CodeGen/AMDGPU/chain-hi-to-lo.ll
  llvm/test/CodeGen/AMDGPU/load-hi16.ll

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