2 files changed, 20 insertions, 2 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/LegalizeTypes.cpp b/llvm/lib/CodeGen/SelectionDAG/LegalizeTypes.cpp
index a97842a9402..7887cf81195 100644
--- a/llvm/lib/CodeGen/SelectionDAG/LegalizeTypes.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/LegalizeTypes.cpp
@@ -1007,6 +1007,8 @@ SDValue DAGTypeLegalizer::GetVectorElementPointer(SDValue VecPtr, EVT EltVT,
 
   // Calculate the element offset and add it to the pointer.
   unsigned EltSize = EltVT.getSizeInBits() / 8; // FIXME: should be ABI size.
+  assert(EltSize * 8 == EltVT.getSizeInBits() &&
+         "Converting bits to bytes lost precision");
 
   Index = DAG.getNode(ISD::MUL, dl, Index.getValueType(), Index,
                       DAG.getConstant(EltSize, dl, Index.getValueType()));
diff --git a/llvm/lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp b/llvm/lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp
index 8551058591c..362a73a484c 100644
--- a/llvm/lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp
@@ -1554,9 +1554,25 @@ SDValue DAGTypeLegalizer::SplitVecOp_EXTRACT_VECTOR_ELT(SDNode *N) {
   if (CustomLowerNode(N, N->getValueType(0), true))
     return SDValue();
 
-  // Store the vector to the stack.
-  EVT EltVT = VecVT.getVectorElementType();
+  // Make the vector elements byte-addressable if they aren't already.
   SDLoc dl(N);
+  EVT EltVT = VecVT.getVectorElementType();
+  if (EltVT.getSizeInBits() < 8) {
+    SmallVector<SDValue, 4> ElementOps;
+    for (unsigned i = 0; i < VecVT.getVectorNumElements(); ++i) {
+      ElementOps.push_back(DAG.getAnyExtOrTrunc(
+          DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, EltVT, Vec,
+                      DAG.getConstant(i, dl, MVT::i8)),
+          dl, MVT::i8));
+    }
+
+    EltVT = MVT::i8;
+    VecVT = EVT::getVectorVT(*DAG.getContext(), EltVT,
+                             VecVT.getVectorNumElements());
+    Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, VecVT, ElementOps);
+  }
+
+  // Store the vector to the stack.
   SDValue StackPtr = DAG.CreateStackTemporary(VecVT);
   SDValue Store = DAG.getStore(DAG.getEntryNode(), dl, Vec, StackPtr,
                                MachinePointerInfo(), false, false, 0);