Compute feature bits at time of MCSubtargetInfo initialization.

llvm-svn: 134606
diff --git a/llvm/lib/Target/MSP430/MSP430Subtarget.h b/llvm/lib/Target/MSP430/MSP430Subtarget.h
index ead213b..1ce5f11 100644
--- a/llvm/lib/Target/MSP430/MSP430Subtarget.h
+++ b/llvm/lib/Target/MSP430/MSP430Subtarget.h
@@ -22,6 +22,7 @@
 #include <string>
 
 namespace llvm {
+class StringRef;
 
 class MSP430Subtarget : public MSP430GenSubtargetInfo {
   bool ExtendedInsts;
@@ -34,7 +35,7 @@
 
   /// ParseSubtargetFeatures - Parses features string setting specified
   /// subtarget options.  Definition of function is auto generated by tblgen.
-  void ParseSubtargetFeatures(const std::string &FS, const std::string &CPU);
+  void ParseSubtargetFeatures(StringRef CPU, StringRef FS);
 };
 } // End llvm namespace