Fix PR5149.

http://llvm.org/bugs/show_bug.cgi?id=5149

llvm-svn: 86543
diff --git a/llvm/lib/Target/Mips/MipsMachineFunction.h b/llvm/lib/Target/Mips/MipsMachineFunction.h
index 949c78a..a300f49 100644
--- a/llvm/lib/Target/Mips/MipsMachineFunction.h
+++ b/llvm/lib/Target/Mips/MipsMachineFunction.h
@@ -103,6 +103,7 @@
   int getGPFI() const { return GPHolder.FI; }
   void setGPStackOffset(int Off) { GPHolder.SPOffset = Off; }
   void setGPFI(int FI) { GPHolder.FI = FI; }
+  bool needGPSaveRestore() const { return GPHolder.SPOffset != -1; }
 
   bool hasLoadArgs() const { return HasLoadArgs; }
   bool hasStoreVarArgs() const { return HasStoreVarArgs; }