add virtual methods to get the start/end of a MCParsedAsmOperand,
the default implementation returns "unknown".

llvm-svn: 93470
diff --git a/llvm/tools/llvm-mc/AsmParser.cpp b/llvm/tools/llvm-mc/AsmParser.cpp
index bd0e0e2..2eb75a7 100644
--- a/llvm/tools/llvm-mc/AsmParser.cpp
+++ b/llvm/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