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llvm-mirror/utils/TableGen/TableGen.cpp
Johnny Chen 6d9cbe7270 Second try of initial ARM/Thumb disassembler check-in. It consists of a tablgen 
backend (ARMDecoderEmitter) which emits the decoder functions for ARM and Thumb,
and the disassembler core which invokes the decoder function and builds up the
MCInst based on the decoded Opcode.

Reviewed by Chris Latter and Bob Wilson.

llvm-svn: 100233
2010-04-02 22:27:38 +00:00

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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 "AsmMatcherEmitter.h"
#include "AsmWriterEmitter.h"
#include "CallingConvEmitter.h"
#include "ClangDiagnosticsEmitter.h"
#include "CodeEmitterGen.h"
#include "DAGISelEmitter.h"
#include "DisassemblerEmitter.h"
#include "EDEmitter.h"
#include "FastISelEmitter.h"
#include "InstrEnumEmitter.h"
#include "InstrInfoEmitter.h"
#include "IntrinsicEmitter.h"
#include "LLVMCConfigurationEmitter.h"
#include "OptParserEmitter.h"
#include "Record.h"
#include "RegisterInfoEmitter.h"
#include "ARMDecoderEmitter.h"
#include "SubtargetEmitter.h"
#include "TGParser.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/PrettyStackTrace.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/System/Signals.h"
#include <algorithm>
#include <cstdio>
using namespace llvm;
enum ActionType {
PrintRecords,
GenEmitter,
GenRegisterEnums, GenRegister, GenRegisterHeader,
GenInstrEnums, GenInstrs, GenAsmWriter, GenAsmMatcher,
GenARMDecoder,
GenDisassembler,
GenCallingConv,
GenClangDiagsDefs,
GenClangDiagGroups,
GenDAGISel,
GenFastISel,
GenOptParserDefs, GenOptParserImpl,
GenSubtarget,
GenIntrinsic,
GenTgtIntrinsic,
GenLLVMCConf,
GenEDHeader, GenEDInfo,
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(GenARMDecoder, "gen-arm-decoder",
"Generate decoders for ARM/Thumb"),
clEnumValN(GenDisassembler, "gen-disassembler",
"Generate disassembler"),
clEnumValN(GenAsmMatcher, "gen-asm-matcher",
"Generate assembly instruction matcher"),
clEnumValN(GenDAGISel, "gen-dag-isel",
"Generate a DAG instruction selector"),
clEnumValN(GenFastISel, "gen-fast-isel",
"Generate a \"fast\" instruction selector"),
clEnumValN(GenOptParserDefs, "gen-opt-parser-defs",
"Generate option definitions"),
clEnumValN(GenOptParserImpl, "gen-opt-parser-impl",
"Generate option parser implementation"),
clEnumValN(GenSubtarget, "gen-subtarget",
"Generate subtarget enumerations"),
clEnumValN(GenIntrinsic, "gen-intrinsic",
"Generate intrinsic information"),
clEnumValN(GenTgtIntrinsic, "gen-tgt-intrinsic",
"Generate target intrinsic information"),
clEnumValN(GenClangDiagsDefs, "gen-clang-diags-defs",
"Generate Clang diagnostics definitions"),
clEnumValN(GenClangDiagGroups, "gen-clang-diag-groups",
"Generate Clang diagnostic groups"),
clEnumValN(GenLLVMCConf, "gen-llvmc",
"Generate LLVMC configuration library"),
clEnumValN(GenEDHeader, "gen-enhanced-disassembly-header",
"Generate enhanced disassembly info header"),
clEnumValN(GenEDInfo, "gen-enhanced-disassembly-info",
"Generate enhanced disassembly info"),
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);
cl::opt<std::string>
ClangComponent("clang-component",
cl::desc("Only use warnings from specified component"),
cl::value_desc("component"), cl::Hidden);
}
// FIXME: Eliminate globals from tblgen.
RecordKeeper llvm::Records;
static SourceMgr SrcMgr;
void llvm::PrintError(SMLoc ErrorLoc, const std::string &Msg) {
SrcMgr.PrintMessage(ErrorLoc, Msg, "error");
}
/// ParseFile - this function begins the parsing of the specified tablegen
/// file.
static bool ParseFile(const std::string &Filename,
const std::vector<std::string> &IncludeDirs,
SourceMgr &SrcMgr) {
std::string ErrorStr;
MemoryBuffer *F = MemoryBuffer::getFileOrSTDIN(Filename.c_str(), &ErrorStr);
if (F == 0) {
errs() << "Could not open input file '" << Filename << "': "
<< ErrorStr <<"\n";
return true;
}
// Tell SrcMgr about this buffer, which is what TGParser will pick up.
SrcMgr.AddNewSourceBuffer(F, SMLoc());
// Record the location of the include directory so that the lexer can find
// it later.
SrcMgr.setIncludeDirs(IncludeDirs);
TGParser Parser(SrcMgr);
return Parser.ParseFile();
}
int main(int argc, char **argv) {
sys::PrintStackTraceOnErrorSignal();
PrettyStackTraceProgram X(argc, argv);
cl::ParseCommandLineOptions(argc, argv);
// Parse the input file.
if (ParseFile(InputFilename, IncludeDirs, SrcMgr))
return 1;
raw_ostream *Out = &outs();
if (OutputFilename != "-") {
std::string Error;
Out = new raw_fd_ostream(OutputFilename.c_str(), Error);
if (!Error.empty()) {
errs() << argv[0] << ": error opening " << OutputFilename
<< ":" << Error << "\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 GenARMDecoder:
ARMDecoderEmitter(Records).run(*Out);
break;
case GenAsmMatcher:
AsmMatcherEmitter(Records).run(*Out);
break;
case GenClangDiagsDefs:
ClangDiagsDefsEmitter(Records, ClangComponent).run(*Out);
break;
case GenClangDiagGroups:
ClangDiagGroupsEmitter(Records).run(*Out);
break;
case GenDisassembler:
DisassemblerEmitter(Records).run(*Out);
break;
case GenOptParserDefs:
OptParserEmitter(Records, true).run(*Out);
break;
case GenOptParserImpl:
OptParserEmitter(Records, false).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 GenTgtIntrinsic:
IntrinsicEmitter(Records, true).run(*Out);
break;
case GenLLVMCConf:
LLVMCConfigurationEmitter(Records).run(*Out);
break;
case GenEDHeader:
EDEmitter(Records).runHeader(*Out);
break;
case GenEDInfo:
EDEmitter(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;
}
if (Out != &outs())
delete Out; // Close the file
return 0;
} catch (const TGError &Error) {
errs() << argv[0] << ": error:\n";
PrintError(Error.getLoc(), Error.getMessage());
} catch (const std::string &Error) {
errs() << argv[0] << ": " << Error << "\n";
} catch (const char *Error) {
errs() << argv[0] << ": " << Error << "\n";
} catch (...) {
errs() << argv[0] << ": Unknown unexpected exception occurred.\n";
}
if (Out != &outs()) {
delete Out; // Close the file
std::remove(OutputFilename.c_str()); // Remove the file, it's broken
}
return 1;
}
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