Fix typo. Thanks, Andy!

llvm-svn: 137023
diff --git a/llvm/lib/CodeGen/RegAllocGreedy.cpp b/llvm/lib/CodeGen/RegAllocGreedy.cpp
index 4fcbdb8..f59e220 100644
--- a/llvm/lib/CodeGen/RegAllocGreedy.cpp
+++ b/llvm/lib/CodeGen/RegAllocGreedy.cpp
@@ -945,7 +945,7 @@
   assert(NumGlobalIntvs && "No global intervals configured");
 
   // Isolate even single instructions when dealing with a proper sub-class.
-  // That giarantees register class inflation for the stack interval because it
+  // That guarantees register class inflation for the stack interval because it
   // is all copies.
   unsigned Reg = SA->getParent().reg;
   bool SingleInstrs = RegClassInfo.isProperSubClass(MRI->getRegClass(Reg));