[PATCH] D110939: [PHIElimination] Update LiveVariables after handling an unspillable terminator

[Jay Foad via Phabricator via llvm-commits]

This revision was automatically updated to reflect the committed changes.
Closed by commit rGf65458df32f7: [PHIElimination] Update LiveVariables after handling an unspillable terminator (authored by foad).

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D110939/new/

https://reviews.llvm.org/D110939

Files:
  llvm/lib/CodeGen/PHIElimination.cpp


Index: llvm/lib/CodeGen/PHIElimination.cpp
===================================================================
--- llvm/lib/CodeGen/PHIElimination.cpp
+++ llvm/lib/CodeGen/PHIElimination.cpp
@@ -461,6 +461,15 @@
       assert(MRI->use_empty(SrcReg) &&
              "Expected a single use from UnspillableTerminator");
       SrcRegDef->getOperand(0).setReg(IncomingReg);
+
+      // Update LiveVariables.
+      if (LV) {
+        LiveVariables::VarInfo &SrcVI = LV->getVarInfo(SrcReg);
+        LiveVariables::VarInfo &IncomingVI = LV->getVarInfo(IncomingReg);
+        IncomingVI.AliveBlocks = std::move(SrcVI.AliveBlocks);
+        SrcVI.AliveBlocks.clear();
+      }
+
       continue;
     }
 


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