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//===- AsmMatcherEmitter.cpp - Generate an assembly matcher ---------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This tablegen backend emits a target specifier matcher for converting parsed
// assembly operands in the MCInst structures.
//
//===----------------------------------------------------------------------===//
#include "AsmMatcherEmitter.h"
#include "CodeGenTarget.h"
#include "Record.h"
using namespace llvm;
void AsmMatcherEmitter::run(raw_ostream &OS) {
CodeGenTarget Target;
const std::vector<CodeGenRegister> &Registers = Target.getRegisters();
Record *AsmParser = Target.getAsmParser();
std::string ClassName = AsmParser->getValueAsString("AsmParserClassName");
std::string Namespace = Registers[0].TheDef->getValueAsString("Namespace");
EmitSourceFileHeader("Assembly Matcher Source Fragment", OS);
// Emit the function to match a register name to number.
OS << "bool " << Target.getName() << ClassName
<< "::MatchRegisterName(const StringRef &Name, unsigned &RegNo) {\n";
// FIXME: TableGen should have a fast string matcher generator.
for (unsigned i = 0, e = Registers.size(); i != e; ++i) {
const CodeGenRegister &Reg = Registers[i];
if (Reg.TheDef->getValueAsString("AsmName").empty())
continue;
OS << " if (Name == \""
<< Reg.TheDef->getValueAsString("AsmName") << "\")\n"
<< " return RegNo=" << i + 1 << ", false;\n";
}
OS << " return true;\n";
OS << "}\n";
}
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