Push StringRefs through the metadata interface.

llvm-svn: 145934
diff --git a/llvm/lib/Transforms/Scalar/LICM.cpp b/llvm/lib/Transforms/Scalar/LICM.cpp
index 54a3da8..65d8c6b 100644
--- a/llvm/lib/Transforms/Scalar/LICM.cpp
+++ b/llvm/lib/Transforms/Scalar/LICM.cpp
@@ -379,7 +379,7 @@
     // in the same alias set as something that ends up being modified.
     if (AA->pointsToConstantMemory(LI->getOperand(0)))
       return true;
-    if (LI->getMetadata(LI->getContext().getMDKindID("invariant.load")))
+    if (LI->getMetadata("invariant.load"))
       return true;
 
     // Don't hoist loads which have may-aliased stores in loop.