Pointer arithmetic should be done with the index the same size as the pointer.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43120 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
index da2c1dc..c111036 100644
--- a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
+++ b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
@@ -4134,6 +4134,13 @@
unsigned EltSize = MVT::getSizeInBits(Op.getValueType())/8;
Idx = DAG.getNode(ISD::MUL, Idx.getValueType(), Idx,
DAG.getConstant(EltSize, Idx.getValueType()));
+
+ if (MVT::getSizeInBits(Idx.getValueType()) >
+ MVT::getSizeInBits(TLI.getPointerTy()))
+ Idx = DAG.getNode(ISD::TRUNCATE, TLI.getPointerTy(), StackPtr);
+ else
+ Idx = DAG.getNode(ISD::SIGN_EXTEND, TLI.getPointerTy(), StackPtr);
+
StackPtr = DAG.getNode(ISD::ADD, Idx.getValueType(), Idx, StackPtr);
Op = DAG.getLoad(Op.getValueType(), Ch, StackPtr, NULL, 0);