Add an "original alignment" field to load and store nodes. This enables the

DAG Combiner to disambiguate chains for loads and stores of types which are
 broken up by the Legalizer into smaller pieces.  


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81813 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 5 insertions, 6 deletions

diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
index ad599124fb..8b9a5a5459 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
@@ -2812,11 +2812,10 @@ void SelectionDAGLowering::visitLoad(LoadInst &I) {
   EVT PtrVT = Ptr.getValueType();
   for (unsigned i = 0; i != NumValues; ++i) {
     SDValue L = DAG.getLoad(ValueVTs[i], getCurDebugLoc(), Root,
-                              DAG.getNode(ISD::ADD, getCurDebugLoc(),
-                                          PtrVT, Ptr,
-                                          DAG.getConstant(Offsets[i], PtrVT)),
-                              SV, Offsets[i],
-                              isVolatile, Alignment);
+                            DAG.getNode(ISD::ADD, getCurDebugLoc(),
+                                        PtrVT, Ptr,
+                                        DAG.getConstant(Offsets[i], PtrVT)),
+                            SV, Offsets[i], isVolatile, Alignment, Alignment);
     Values[i] = L;
     Chains[i] = L.getValue(1);
   }
@@ -2866,7 +2865,7 @@ void SelectionDAGLowering::visitStore(StoreInst &I) {
                                          PtrVT, Ptr,
                                          DAG.getConstant(Offsets[i], PtrVT)),
                              PtrV, Offsets[i],
-                             isVolatile, Alignment);
+                             isVolatile, Alignment, Alignment);
 
   DAG.setRoot(DAG.getNode(ISD::TokenFactor, getCurDebugLoc(),
                           MVT::Other, &Chains[0], NumValues));