Change MachineMemOperand's alignment value to be the alignment of

the base pointer, without the offset. This matches MemSDNode's
new alignment behavior, and holds more interesting information.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82473 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/SelectionDAG/SelectionDAG.cpp

@@ -5015,10 +5015,10 @@ MachineMemOperand MemSDNode::getMemOperand() const {
   dyn_cast<const FrameIndexSDNode>(getBasePtr().getNode());
   if (!getSrcValue() && FI)
     return MachineMemOperand(PseudoSourceValue::getFixedStack(FI->getIndex()),
-                             Flags, 0, Size, getAlignment());
+                             Flags, 0, Size, getOriginalAlignment());
   else
     return MachineMemOperand(getSrcValue(), Flags, getSrcValueOffset(),
-                             Size, getAlignment());
+                             Size, getOriginalAlignment());
 }
 
 /// Profile - Gather unique data for the node.