[MSSA] Fix typo. NFC.

llvm-svn: 274590
diff --git a/llvm/lib/Transforms/Utils/MemorySSA.cpp b/llvm/lib/Transforms/Utils/MemorySSA.cpp
index 289fff8..a1f04c5 100644
--- a/llvm/lib/Transforms/Utils/MemorySSA.cpp
+++ b/llvm/lib/Transforms/Utils/MemorySSA.cpp
@@ -245,7 +245,7 @@
     DomLevels[*DFI] = DFI.getPathLength() - 1;
 }
 
-/// \brief This handles unreachable block acccesses by deleting phi nodes in
+/// \brief This handles unreachable block accesses by deleting phi nodes in
 /// unreachable blocks, and marking all other unreachable MemoryAccess's as
 /// being uses of the live on entry definition.
 void MemorySSA::markUnreachableAsLiveOnEntry(BasicBlock *BB) {