--- lib/Target/Sparc/SparcISelLowering.cpp	(revision 223367)
+++ lib/Target/Sparc/SparcISelLowering.cpp	(working copy)
@@ -18,6 +18,7 @@ 
 #include "SparcRegisterInfo.h"
 #include "SparcTargetMachine.h"
 #include "SparcTargetObjectFile.h"
+#include "llvm/ADT/StringSwitch.h"
 #include "llvm/CodeGen/CallingConvLower.h"
 #include "llvm/CodeGen/MachineFrameInfo.h"
 #include "llvm/CodeGen/MachineFunction.h"
@@ -3219,3 +3220,20 @@ 
     return;
   }
 }
+
+#include "llvm/Support/raw_ostream.h"
+
+unsigned SparcTargetLowering::getRegisterByName(const char* RegName,
+                                                EVT VT) const {
+  unsigned Reg = StringSwitch<unsigned>(RegName)
+                       .Case("%g5", SP::G5)
+                       .Case("%g6", SP::G6)
+                       .Case("%g7", SP::G7)
+                       .Default(0);
+  if (Reg)
+    return Reg;
+
+  llvm::outs() << "Regname = " << RegName << "\n";      
+
+  report_fatal_error("Invalid register name global variable");
+}
--- lib/Target/Sparc/SparcISelLowering.h	(revision 223367)
+++ lib/Target/Sparc/SparcISelLowering.h	(working copy)
@@ -172,6 +172,8 @@ 
                                        MachineBasicBlock *BB,
                                        unsigned Opcode,
                                        unsigned CondCode = 0) const;
+
+    unsigned getRegisterByName(const char* RegName, EVT VT) const override;
   };
 } // end namespace llvm