Use StringRef in Pass/PassManager APIs (NFC)

llvm-svn: 283004
diff --git a/llvm/lib/Target/PowerPC/PPCISelDAGToDAG.cpp b/llvm/lib/Target/PowerPC/PPCISelDAGToDAG.cpp
index 8b5fc51..6f8f566 100644
--- a/llvm/lib/Target/PowerPC/PPCISelDAGToDAG.cpp
+++ b/llvm/lib/Target/PowerPC/PPCISelDAGToDAG.cpp
@@ -215,7 +215,7 @@
 
     void InsertVRSaveCode(MachineFunction &MF);
 
-    const char *getPassName() const override {
+    StringRef getPassName() const override {
       return "PowerPC DAG->DAG Pattern Instruction Selection";
     }