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-rw-r--r--llvm/lib/VMCore/ConstantFolding.cpp8
1 files changed, 4 insertions, 4 deletions
diff --git a/llvm/lib/VMCore/ConstantFolding.cpp b/llvm/lib/VMCore/ConstantFolding.cpp
index db21bd3d782..1fee5012b45 100644
--- a/llvm/lib/VMCore/ConstantFolding.cpp
+++ b/llvm/lib/VMCore/ConstantFolding.cpp
@@ -608,10 +608,10 @@ static int IdxCompare(Constant *C1, Constant *C2) {
if (!isa<ConstantInt>(C1) || !isa<ConstantInt>(C2))
return -2; // don't know!
- // Ok, we have two differing integer indices. Convert them to
- // be the same type. Long is always big enough, so we use it.
- C1 = ConstantExpr::getCast(C1, Type::LongTy);
- C2 = ConstantExpr::getCast(C2, Type::LongTy);
+ // Ok, we have two differing integer indices. Sign extend them to be the same
+ // type. Long is always big enough, so we use it.
+ C1 = ConstantExpr::getSignExtend(C1, Type::LongTy);
+ C2 = ConstantExpr::getSignExtend(C2, Type::LongTy);
if (C1 == C2) return 0; // Are they just differing types?
// If they are really different, now that they are the same type, then we
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