MCStreamer &Out, unsigned &ErrorInfo,
bool MatchingInlineAsm) = 0;
+ /// Allow a target to add special case operand matching for things that
+ /// tblgen doesn't/can't handle effectively. For example, literal
+ /// immediates on ARM. TableGen expects a token operand, but the parser
+ /// will recognize them as immediates.
+ virtual unsigned validateTargetOperandClass(MCParsedAsmOperand *Op,
+ unsigned Kind) {
+ return Match_InvalidOperand;
+ }
+
/// checkTargetMatchPredicate - Validate the instruction match against
/// any complex target predicates not expressible via match classes.
virtual unsigned checkTargetMatchPredicate(MCInst &Inst) {
OS << "(MatchClassKind)it->Classes[i]);\n";
OS << " if (Diag == Match_Success)\n";
OS << " continue;\n";
+ OS << " // If the generic handler indicates an invalid operand\n";
+ OS << " // failure, check for a special case.\n";
+ OS << " if (Diag == Match_InvalidOperand) {\n";
+ OS << " Diag = validateTargetOperandClass(Operands[i+1],\n";
+ OS.indent(43);
+ OS << "(MatchClassKind)it->Classes[i]);\n";
+ OS << " if (Diag == Match_Success)\n";
+ OS << " continue;\n";
+ OS << " }\n";
OS << " // If this operand is broken for all of the instances of this\n";
OS << " // mnemonic, keep track of it so we can report loc info.\n";
OS << " // If we already had a match that only failed due to a\n";