LegalizeDAG: Don't replace vector store with integer if not legal

For the same reason as the corresponding load change.

Note that ExpandStore is completely broken for non-byte sized element
vector stores, but preserve the current broken behavior which has tests
for it. The behavior should be the same, but now introduces a new typed
store that is incorrectly split later rather than doing it directly.

llvm-svn: 264928

1 files changed, 6 insertions, 0 deletions

diff --git a/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
index d9f75ad0b5c..9129e715a63 100644
--- a/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
@@ -327,6 +327,12 @@ static void ExpandUnalignedStore(StoreSDNode *ST, SelectionDAG &DAG,
       ST->getMemoryVT().isVector()) {
     EVT intVT = EVT::getIntegerVT(*DAG.getContext(), VT.getSizeInBits());
     if (TLI.isTypeLegal(intVT)) {
+      if (!TLI.isOperationLegalOrCustom(ISD::STORE, intVT)) {
+        // Scalarize the store and let the individual components be handled.
+        SDValue Result = TLI.scalarizeVectorStore(ST, DAG);
+        DAGLegalize->ReplaceNode(SDValue(ST, 0), Result);
+        return;
+      }
       // Expand to a bitconvert of the value to the integer type of the
       // same size, then a (misaligned) int store.
       // FIXME: Does not handle truncating floating point stores!