[PATCH] D147031: [MachineCopy] Bug fix sub register machine copy propagation

[Kai Luo via Phabricator via llvm-commits]

lkail added inline comments.


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Comment at: llvm/lib/CodeGen/MachineCopyPropagation.cpp:611
 
+  auto CheckRegClass = [this](Register Def, Register Src) {
+    for (const TargetRegisterClass *RC : TRI->regclasses()) {
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This looks similar to what `isForwardableRegClassCopy` does? Can we extend `isForwardableRegClassCopy` to contain subregindex?


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