Debug Info: Turn DIExpression::getFrameRegister() into an isFrameRegister()
function.

NFC.

llvm-svn: 225846
diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfExpression.h b/llvm/lib/CodeGen/AsmPrinter/DwarfExpression.h
index 9e93a57..9aba3f8 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfExpression.h
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfExpression.h
@@ -40,7 +40,7 @@
   virtual void EmitSigned(int Value) = 0;
   virtual void EmitUnsigned(unsigned Value) = 0;
 
-  virtual unsigned getFrameRegister() = 0;
+  virtual bool isFrameRegister(unsigned MachineReg) = 0;
 
   /// Emit a dwarf register operation.
   void AddReg(int DwarfReg, const char* Comment = nullptr);
@@ -92,7 +92,7 @@
   void EmitOp(uint8_t Op, const char *Comment) override;
   void EmitSigned(int Value) override;
   void EmitUnsigned(unsigned Value) override;
-  unsigned getFrameRegister() override;
+  bool isFrameRegister(unsigned MachineReg) override;
 };
 
 }