diff --git a/lib/CodeGen/MachineInstr.cpp b/lib/CodeGen/MachineInstr.cpp
index 2d06aa4..ae6f3f5 100644
--- a/lib/CodeGen/MachineInstr.cpp
+++ b/lib/CodeGen/MachineInstr.cpp
@@ -315,6 +315,12 @@
   }
 }
 
+/// getAlignment - Return the minimum known alignment in bytes of the
+/// actual memory reference.
+uint64_t MachineMemOperand::getAlignment() const {
+  return MinAlign(getBaseAlignment(), getOffset());
+}
+
 raw_ostream &llvm::operator<<(raw_ostream &OS, const MachineMemOperand &MMO) {
   assert((MMO.isLoad() || MMO.isStore()) &&
          "SV has to be a load, store or both.");