StringRef-ify Binary/UnaryOperator::getOpcodeStr

llvm-svn: 165383
diff --git a/clang/lib/AST/Expr.cpp b/clang/lib/AST/Expr.cpp
index e1198b8..694325a 100644
--- a/clang/lib/AST/Expr.cpp
+++ b/clang/lib/AST/Expr.cpp
@@ -869,7 +869,7 @@
 
 /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it
 /// corresponds to, e.g. "sizeof" or "[pre]++".
-const char *UnaryOperator::getOpcodeStr(Opcode Op) {
+StringRef UnaryOperator::getOpcodeStr(Opcode Op) {
   switch (Op) {
   case UO_PostInc: return "++";
   case UO_PostDec: return "--";
@@ -1570,7 +1570,7 @@
 
 /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it
 /// corresponds to, e.g. "<<=".
-const char *BinaryOperator::getOpcodeStr(Opcode Op) {
+StringRef BinaryOperator::getOpcodeStr(Opcode Op) {
   switch (Op) {
   case BO_PtrMemD:   return ".*";
   case BO_PtrMemI:   return "->*";