Make more use of llvm::StringRef in various APIs. In particular, don't
use the deprecated forms of llvm::StringMap::GetOrCreateValue().

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@133515 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Basic/SourceManager.cpp b/lib/Basic/SourceManager.cpp
index 2de8ab7..23ebb4f 100644
--- a/lib/Basic/SourceManager.cpp
+++ b/lib/Basic/SourceManager.cpp
@@ -169,11 +169,11 @@
   return Buffer.getPointer();
 }
 
-unsigned LineTableInfo::getLineTableFilenameID(const char *Ptr, unsigned Len) {
+unsigned LineTableInfo::getLineTableFilenameID(llvm::StringRef Name) {
   // Look up the filename in the string table, returning the pre-existing value
   // if it exists.
   llvm::StringMapEntry<unsigned> &Entry =
-    FilenameIDs.GetOrCreateValue(Ptr, Ptr+Len, ~0U);
+    FilenameIDs.GetOrCreateValue(Name, ~0U);
   if (Entry.getValue() != ~0U)
     return Entry.getValue();
 
@@ -277,10 +277,10 @@
 
 /// getLineTableFilenameID - Return the uniqued ID for the specified filename.
 ///
-unsigned SourceManager::getLineTableFilenameID(const char *Ptr, unsigned Len) {
+unsigned SourceManager::getLineTableFilenameID(llvm::StringRef Name) {
   if (LineTable == 0)
     LineTable = new LineTableInfo();
-  return LineTable->getLineTableFilenameID(Ptr, Len);
+  return LineTable->getLineTableFilenameID(Name);
 }