add virtual methods to get the start/end of a MCParsedAsmOperand,

the default implementation returns "unknown".


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93470 91177308-0d34-0410-b5e6-96231b3b80d8

tools/llvm-mc/AsmParser.cpp

@@ -29,6 +29,11 @@
 #include "llvm/Target/TargetAsmParser.h"
 using namespace llvm;
 
+/// getStartLoc - Get the location of the first token of this operand.
+SMLoc MCParsedAsmOperand::getStartLoc() const { return SMLoc(); }
+SMLoc MCParsedAsmOperand::getEndLoc() const { return SMLoc(); }
+
+
 // Mach-O section uniquing.
 //
 // FIXME: Figure out where this should live, it should be shared by