[PATCH] D86468: [WIP][GlobalISel] CSE copies

[Matt Arsenault via Phabricator via llvm-commits]

arsenm added inline comments.


================
Comment at: llvm/lib/CodeGen/GlobalISel/CSEMIRBuilder.cpp:168-172
+    if (Dst.getDstOpKind() == DstOp::DstType::Ty_LLT &&
+        Dst.getLLTTy(*getMRI()) == Src.getLLTTy(*getMRI())) {
+      Register SrcReg = Src.getReg();
+      assert(SrcReg.isVirtual());
+      return MachineInstrBuilder(getMF(), getMRI()->getVRegDef(SrcReg));
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This would also have to be careful to not fold away cross class or bank copies


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D86468/new/

https://reviews.llvm.org/D86468