Fixup! Create undef using buildUndef

llvm · Oct 1, 2024 · 15949a1 · 15949a1
1 parent 7e961db
commit 15949a1
Showing 1 changed file with 2 additions and 3 deletions.
diff --git a/llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp b/llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp
@@ -4284,12 +4284,11 @@ void CombinerHelper::applyCombineExtractToShuffle(
   }
 
   // We could reuse the same vector register and shuffle them both together
-  // but it is nicer for later optimizations to explicitely make it undef.
+  // but it is nicer for later optimizations to explicitly make it undef.
   const GBuildVector *BuildVector = cast<GBuildVector>(&MI);
   Register SecondRegister = VectorRegisters.second;
   if (FirstRegister == SecondRegister) {
-    SecondRegister = MRI.createGenericVirtualRegister(FirstRegisterType);
-    Builder.buildUndef(SecondRegister);
+    SecondRegister = Builder.buildUndef(FirstRegisterType).getReg(0);
   }
 
   Builder.buildShuffleVector(BuildVector->getOperand(0), FirstRegister,