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//===- TableGen.cpp - Top-Level TableGen implementation -------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// TableGen is a tool which can be used to build up a description of something,
// then invoke one or more "tablegen backends" to emit information about the
// description in some predefined format. In practice, this is used by the LLVM
// code generators to automate generation of a code generator through a
// high-level description of the target.
//
//===----------------------------------------------------------------------===//
#include "Record.h"
#include "TGParser.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Streams.h"
#include "llvm/System/Signals.h"
#include "llvm/Support/FileUtilities.h"
#include "llvm/Support/MemoryBuffer.h"
#include "CallingConvEmitter.h"
#include "CodeEmitterGen.h"
#include "RegisterInfoEmitter.h"
#include "InstrInfoEmitter.h"
#include "InstrEnumEmitter.h"
#include "AsmWriterEmitter.h"
#include "DAGISelEmitter.h"
#include "FastISelEmitter.h"
#include "SubtargetEmitter.h"
#include "IntrinsicEmitter.h"
#include "LLVMCConfigurationEmitter.h"
#include <algorithm>
#include <cstdio>
#include <fstream>
#include <ios>
using namespace llvm;
enum ActionType {
PrintRecords,
GenEmitter,
GenRegisterEnums, GenRegister, GenRegisterHeader,
GenInstrEnums, GenInstrs, GenAsmWriter,
GenCallingConv,
GenDAGISel,
GenFastISel,
GenSubtarget,
GenIntrinsic,
GenLLVMCConf,
PrintEnums
};
namespace {
cl::opt<ActionType>
Action(cl::desc("Action to perform:"),
cl::values(clEnumValN(PrintRecords, "print-records",
"Print all records to stdout (default)"),
clEnumValN(GenEmitter, "gen-emitter",
"Generate machine code emitter"),
clEnumValN(GenRegisterEnums, "gen-register-enums",
"Generate enum values for registers"),
clEnumValN(GenRegister, "gen-register-desc",
"Generate a register info description"),
clEnumValN(GenRegisterHeader, "gen-register-desc-header",
"Generate a register info description header"),
clEnumValN(GenInstrEnums, "gen-instr-enums",
"Generate enum values for instructions"),
clEnumValN(GenInstrs, "gen-instr-desc",
"Generate instruction descriptions"),
clEnumValN(GenCallingConv, "gen-callingconv",
"Generate calling convention descriptions"),
clEnumValN(GenAsmWriter, "gen-asm-writer",
"Generate assembly writer"),
clEnumValN(GenDAGISel, "gen-dag-isel",
"Generate a DAG instruction selector"),
clEnumValN(GenFastISel, "gen-fast-isel",
"Generate a \"fast\" instruction selector"),
clEnumValN(GenSubtarget, "gen-subtarget",
"Generate subtarget enumerations"),
clEnumValN(GenIntrinsic, "gen-intrinsic",
"Generate intrinsic information"),
clEnumValN(GenLLVMCConf, "gen-llvmc",
"Generate LLVMC configuration library"),
clEnumValN(PrintEnums, "print-enums",
"Print enum values for a class"),
clEnumValEnd));
cl::opt<std::string>
Class("class", cl::desc("Print Enum list for this class"),
cl::value_desc("class name"));
cl::opt<std::string>
OutputFilename("o", cl::desc("Output filename"), cl::value_desc("filename"),
cl::init("-"));
cl::opt<std::string>
InputFilename(cl::Positional, cl::desc("<input file>"), cl::init("-"));
cl::list<std::string>
IncludeDirs("I", cl::desc("Directory of include files"),
cl::value_desc("directory"), cl::Prefix);
}
RecordKeeper llvm::Records;
/// ParseFile - this function begins the parsing of the specified tablegen
/// file.
static bool ParseFile(const std::string &Filename,
const std::vector<std::string> &IncludeDirs) {
std::string ErrorStr;
MemoryBuffer *F = MemoryBuffer::getFileOrSTDIN(Filename.c_str(), &ErrorStr);
if (F == 0) {
cerr << "Could not open input file '" + Filename + "': " << ErrorStr <<"\n";
return true;
}
TGParser Parser(F);
// Record the location of the include directory so that the lexer can find
// it later.
Parser.setIncludeDirs(IncludeDirs);
return Parser.ParseFile();
}
int main(int argc, char **argv) {
cl::ParseCommandLineOptions(argc, argv);
// Parse the input file.
if (ParseFile(InputFilename, IncludeDirs))
return 1;
std::ostream *Out = cout.stream();
if (OutputFilename != "-") {
Out = new std::ofstream(OutputFilename.c_str());
if (!Out->good()) {
cerr << argv[0] << ": error opening " << OutputFilename << "!\n";
return 1;
}
// Make sure the file gets removed if *gasp* tablegen crashes...
sys::RemoveFileOnSignal(sys::Path(OutputFilename));
}
try {
switch (Action) {
case PrintRecords:
*Out << Records; // No argument, dump all contents
break;
case GenEmitter:
CodeEmitterGen(Records).run(*Out);
break;
case GenRegisterEnums:
RegisterInfoEmitter(Records).runEnums(*Out);
break;
case GenRegister:
RegisterInfoEmitter(Records).run(*Out);
break;
case GenRegisterHeader:
RegisterInfoEmitter(Records).runHeader(*Out);
break;
case GenInstrEnums:
InstrEnumEmitter(Records).run(*Out);
break;
case GenInstrs:
InstrInfoEmitter(Records).run(*Out);
break;
case GenCallingConv:
CallingConvEmitter(Records).run(*Out);
break;
case GenAsmWriter:
AsmWriterEmitter(Records).run(*Out);
break;
case GenDAGISel:
DAGISelEmitter(Records).run(*Out);
break;
case GenFastISel:
FastISelEmitter(Records).run(*Out);
break;
case GenSubtarget:
SubtargetEmitter(Records).run(*Out);
break;
case GenIntrinsic:
IntrinsicEmitter(Records).run(*Out);
break;
case GenLLVMCConf:
LLVMCConfigurationEmitter(Records).run(*Out);
break;
case PrintEnums:
{
std::vector<Record*> Recs = Records.getAllDerivedDefinitions(Class);
for (unsigned i = 0, e = Recs.size(); i != e; ++i)
*Out << Recs[i]->getName() << ", ";
*Out << "\n";
break;
}
default:
assert(1 && "Invalid Action");
return 1;
}
} catch (const std::string &Error) {
cerr << argv[0] << ": " << Error << "\n";
if (Out != cout.stream()) {
delete Out; // Close the file
std::remove(OutputFilename.c_str()); // Remove the file, it's broken
}
return 1;
} catch (...) {
cerr << argv[0] << ": Unknown unexpected exception occurred.\n";
if (Out != cout.stream()) {
delete Out; // Close the file
std::remove(OutputFilename.c_str()); // Remove the file, it's broken
}
return 2;
}
if (Out != cout.stream()) {
delete Out; // Close the file
}
return 0;
}
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