[InstCombine] Create zero constants on demand.

No functional change intended.

llvm-svn: 235257

1 files changed, 2 insertions, 4 deletions

diff --git a/llvm/lib/Transforms/InstCombine/InstCombineCasts.cpp b/llvm/lib/Transforms/InstCombine/InstCombineCasts.cpp
index bd79a2697c1..6b3ba6a7aa2 100644
--- a/llvm/lib/Transforms/InstCombine/InstCombineCasts.cpp
+++ b/llvm/lib/Transforms/InstCombine/InstCombineCasts.cpp
@@ -1770,19 +1770,17 @@ Instruction *InstCombiner::visitBitCast(BitCastInst &CI) {
     // If the source and destination are pointers, and this cast is equivalent
     // to a getelementptr X, 0, 0, 0...  turn it into the appropriate gep.
     // This can enhance SROA and other transforms that want type-safe pointers.
-    Constant *ZeroUInt =
-      Constant::getNullValue(Type::getInt32Ty(CI.getContext()));
     unsigned NumZeros = 0;
     while (SrcElTy != DstElTy &&
            isa<CompositeType>(SrcElTy) && !SrcElTy->isPointerTy() &&
            SrcElTy->getNumContainedTypes() /* not "{}" */) {
-      SrcElTy = cast<CompositeType>(SrcElTy)->getTypeAtIndex(ZeroUInt);
+      SrcElTy = cast<CompositeType>(SrcElTy)->getTypeAtIndex(0U);
       ++NumZeros;
     }
 
     // If we found a path from the src to dest, create the getelementptr now.
     if (SrcElTy == DstElTy) {
-      SmallVector<Value*, 8> Idxs(NumZeros+1, ZeroUInt);
+      SmallVector<Value *, 8> Idxs(NumZeros + 1, Builder->getInt32(0));
       return GetElementPtrInst::CreateInBounds(Src, Idxs);
     }
   }