Compute feature bits at time of MCSubtargetInfo initialization.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134606 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/Sparc/SparcSubtarget.h b/lib/Target/Sparc/SparcSubtarget.h
index 257f22a..00a04c3 100644
--- a/lib/Target/Sparc/SparcSubtarget.h
+++ b/lib/Target/Sparc/SparcSubtarget.h
@@ -21,6 +21,7 @@
 #include "SparcGenSubtargetInfo.inc"
 
 namespace llvm {
+class StringRef;
 
 class SparcSubtarget : public SparcGenSubtargetInfo {
   bool IsV9;
@@ -38,7 +39,7 @@
   
   /// 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);
   
   bool is64Bit() const { return Is64Bit; }
   std::string getDataLayout() const {