Convert StringMap to using StringRef for its APIs.
 - Yay for '-'s and simplifications!

 - I kept StringMap::GetOrCreateValue for compatibility purposes, this can
   eventually go away. Likewise the StringMapEntry Create functions still follow
   the old style.

 - NIFC.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76888 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/LibCallSemantics.cpp b/lib/Analysis/LibCallSemantics.cpp
index 2985047..01fe730 100644
--- a/lib/Analysis/LibCallSemantics.cpp
+++ b/lib/Analysis/LibCallSemantics.cpp
@@ -59,7 +59,7 @@
   // Look up this function in the string map.
   const char *ValueName = F->getNameStart();
   StringMap<const LibCallFunctionInfo*>::iterator I =
-  Map->find(ValueName, ValueName+F->getNameLen());
+    Map->find(StringRef(ValueName, F->getNameLen()));
   return I != Map->end() ? I->second : 0;
 }