1 //===- AsmMatcherEmitter.cpp - Generate an assembly matcher ---------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This tablegen backend emits a target specifier matcher for converting parsed
11 // assembly operands in the MCInst structures.
13 //===----------------------------------------------------------------------===//
15 #include "AsmMatcherEmitter.h"
16 #include "CodeGenTarget.h"
20 void AsmMatcherEmitter::run(raw_ostream &OS) {
22 const std::vector<CodeGenRegister> &Registers = Target.getRegisters();
23 Record *AsmParser = Target.getAsmParser();
24 std::string ClassName = AsmParser->getValueAsString("AsmParserClassName");
26 std::string Namespace = Registers[0].TheDef->getValueAsString("Namespace");
28 EmitSourceFileHeader("Assembly Matcher Source Fragment", OS);
30 // Emit the function to match a register name to number.
32 OS << "bool " << Target.getName() << ClassName
33 << "::MatchRegisterName(const StringRef &Name, unsigned &RegNo) {\n";
35 // FIXME: TableGen should have a fast string matcher generator.
36 for (unsigned i = 0, e = Registers.size(); i != e; ++i) {
37 const CodeGenRegister &Reg = Registers[i];
38 if (Reg.TheDef->getValueAsString("AsmName").empty())
41 OS << " if (Name == \""
42 << Reg.TheDef->getValueAsString("AsmName") << "\")\n"
43 << " return RegNo=" << i + 1 << ", false;\n";
45 OS << " return true;\n";