[PATCH] D152261: [CodeGen] Move lowerCopy from expandPostRA to TII

[Matt Arsenault via Phabricator via llvm-commits]

arsenm added inline comments.


================
Comment at: llvm/include/llvm/CodeGen/TargetInstrInfo.h:1164
+  /// This function defines the logic to lower COPY instruction to
+  /// machine IR.
+  bool lowerCopy(MachineInstr *MI) const;
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barannikov88 wrote:
> cdevadas wrote:
> > Fix the comment  "machine IR" -> "target specific instruction"
> Can't it be lowered into several instructions? The comment near copyPhysReg suggests that it can.
> 
Yes, most copies are expanded to multiple instructions for amdgpu


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D152261/new/

https://reviews.llvm.org/D152261