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-rw-r--r--llvm/lib/VMCore/LLVMContext.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/llvm/lib/VMCore/LLVMContext.cpp b/llvm/lib/VMCore/LLVMContext.cpp
index d7f4594e3ab..722e29ee5dc 100644
--- a/llvm/lib/VMCore/LLVMContext.cpp
+++ b/llvm/lib/VMCore/LLVMContext.cpp
@@ -419,6 +419,7 @@ Constant* LLVMContext::getConstantExprInsertValue(Constant* Agg, Constant* Val,
Constant* LLVMContext::getConstantExprSizeOf(const Type* Ty) {
// sizeof is implemented as: (i64) gep (Ty*)null, 1
+ // Note that a non-inbounds gep is used, as null isn't within any object.
Constant *GEPIdx = ConstantInt::get(Type::Int32Ty, 1);
Constant *GEP = getConstantExprGetElementPtr(
getNullValue(getPointerTypeUnqual(Ty)), &GEPIdx, 1);
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