utils/TableGen/TableGen.cpp

   1 //===- TableGen.cpp - Top-Level TableGen implementation -------------------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 // TableGen is a tool which can be used to build up a description of something,
  11 // then invoke one or more "tablegen backends" to emit information about the
  12 // description in some predefined format.  In practice, this is used by the LLVM
  13 // code generators to automate generation of a code generator through a
  14 // high-level description of the target.
  15 //
  16 //===----------------------------------------------------------------------===//
  17
  18 #include "Record.h"
  19 #include "TGParser.h"
  20 #include "llvm/Support/CommandLine.h"
  21 #include "llvm/Support/Streams.h"
  22 #include "llvm/System/Signals.h"
  23 #include "llvm/Support/FileUtilities.h"
  24 #include "llvm/Support/MemoryBuffer.h"
  25 #include "llvm/Support/PrettyStackTrace.h"
  26 #include "CallingConvEmitter.h"
  27 #include "CodeEmitterGen.h"
  28 #include "RegisterInfoEmitter.h"
  29 #include "InstrInfoEmitter.h"
  30 #include "InstrEnumEmitter.h"
  31 #include "AsmWriterEmitter.h"
  32 #include "DAGISelEmitter.h"
  33 #include "FastISelEmitter.h"
  34 #include "SubtargetEmitter.h"
  35 #include "IntrinsicEmitter.h"
  36 #include "LLVMCConfigurationEmitter.h"
  37 #include "ClangDiagnosticsEmitter.h"
  38 #include <algorithm>
  39 #include <cstdio>
  40 #include <fstream>
  41 #include <ios>
  42 using namespace llvm;
  43
  44 enum ActionType {
  45   PrintRecords,
  46   GenEmitter,
  47   GenRegisterEnums, GenRegister, GenRegisterHeader,
  48   GenInstrEnums, GenInstrs, GenAsmWriter,
  49   GenCallingConv,
  50   GenClangDiagsDefs,
  51   GenClangDiagGroups,
  52   GenDAGISel,
  53   GenFastISel,
  54   GenSubtarget,
  55   GenIntrinsic,
  56   GenTgtIntrinsic,
  57   GenLLVMCConf,
  58   PrintEnums
  59 };
  60
  61 namespace {
  62   cl::opt<ActionType>
  63   Action(cl::desc("Action to perform:"),
  64          cl::values(clEnumValN(PrintRecords, "print-records",
  65                                "Print all records to stdout (default)"),
  66                     clEnumValN(GenEmitter, "gen-emitter",
  67                                "Generate machine code emitter"),
  68                     clEnumValN(GenRegisterEnums, "gen-register-enums",
  69                                "Generate enum values for registers"),
  70                     clEnumValN(GenRegister, "gen-register-desc",
  71                                "Generate a register info description"),
  72                     clEnumValN(GenRegisterHeader, "gen-register-desc-header",
  73                                "Generate a register info description header"),
  74                     clEnumValN(GenInstrEnums, "gen-instr-enums",
  75                                "Generate enum values for instructions"),
  76                     clEnumValN(GenInstrs, "gen-instr-desc",
  77                                "Generate instruction descriptions"),
  78                     clEnumValN(GenCallingConv, "gen-callingconv",
  79                                "Generate calling convention descriptions"),
  80                     clEnumValN(GenAsmWriter, "gen-asm-writer",
  81                                "Generate assembly writer"),
  82                     clEnumValN(GenDAGISel, "gen-dag-isel",
  83                                "Generate a DAG instruction selector"),
  84                     clEnumValN(GenFastISel, "gen-fast-isel",
  85                                "Generate a \"fast\" instruction selector"),
  86                     clEnumValN(GenSubtarget, "gen-subtarget",
  87                                "Generate subtarget enumerations"),
  88                     clEnumValN(GenIntrinsic, "gen-intrinsic",
  89                                "Generate intrinsic information"),
  90                     clEnumValN(GenTgtIntrinsic, "gen-tgt-intrinsic",
  91                                "Generate target intrinsic information"),
  92                     clEnumValN(GenClangDiagsDefs, "gen-clang-diags-defs",
  93                                "Generate Clang diagnostics definitions"),
  94                     clEnumValN(GenClangDiagGroups, "gen-clang-diag-groups",
  95                                "Generate Clang diagnostic groups"),
  96                     clEnumValN(GenLLVMCConf, "gen-llvmc",
  97                                "Generate LLVMC configuration library"),
  98                     clEnumValN(PrintEnums, "print-enums",
  99                                "Print enum values for a class"),
 100                     clEnumValEnd));
 101
 102   cl::opt<std::string>
 103   Class("class", cl::desc("Print Enum list for this class"),
 104         cl::value_desc("class name"));
 105
 106   cl::opt<std::string>
 107   OutputFilename("o", cl::desc("Output filename"), cl::value_desc("filename"),
 108                  cl::init("-"));
 109
 110   cl::opt<std::string>
 111   InputFilename(cl::Positional, cl::desc("<input file>"), cl::init("-"));
 112
 113   cl::list<std::string>
 114   IncludeDirs("I", cl::desc("Directory of include files"),
 115               cl::value_desc("directory"), cl::Prefix);
 116
 117   cl::opt<std::string>
 118   ClangComponent("clang-component",
 119                  cl::desc("Only use warnings from specified component"),
 120                  cl::value_desc("component"), cl::Hidden);
 121 }
 122
 123
 124 // FIXME: Eliminate globals from tblgen.
 125 RecordKeeper llvm::Records;
 126
 127 static TGSourceMgr SrcMgr;
 128
 129 void llvm::PrintError(TGLoc ErrorLoc, const std::string &Msg) {
 130   SrcMgr.PrintError(ErrorLoc, Msg);
 131 }
 132
 133
 134
 135 /// ParseFile - this function begins the parsing of the specified tablegen
 136 /// file.
 137 static bool ParseFile(const std::string &Filename,
 138                       const std::vector<std::string> &IncludeDirs,
 139                       TGSourceMgr &SrcMgr) {
 140   std::string ErrorStr;
 141   MemoryBuffer *F = MemoryBuffer::getFileOrSTDIN(Filename.c_str(), &ErrorStr);
 142   if (F == 0) {
 143     cerr << "Could not open input file '" + Filename + "': " << ErrorStr <<"\n";
 144     return true;
 145   }
 146
 147   // Tell SrcMgr about this buffer, which is what TGParser will pick up.
 148   SrcMgr.AddNewSourceBuffer(F, TGLoc());
 149
 150   TGParser Parser(SrcMgr);
 151
 152   // Record the location of the include directory so that the lexer can find
 153   // it later.
 154   Parser.setIncludeDirs(IncludeDirs);
 155
 156   return Parser.ParseFile();
 157 }
 158
 159 int main(int argc, char **argv) {
 160   sys::PrintStackTraceOnErrorSignal();
 161   PrettyStackTraceProgram X(argc, argv);
 162   cl::ParseCommandLineOptions(argc, argv);
 163
 164
 165   // Parse the input file.
 166   if (ParseFile(InputFilename, IncludeDirs, SrcMgr))
 167     return 1;
 168
 169   std::ostream *Out = cout.stream();
 170   if (OutputFilename != "-") {
 171     Out = new std::ofstream(OutputFilename.c_str());
 172
 173     if (!Out->good()) {
 174       cerr << argv[0] << ": error opening " << OutputFilename << "!\n";
 175       return 1;
 176     }
 177
 178     // Make sure the file gets removed if *gasp* tablegen crashes...
 179     sys::RemoveFileOnSignal(sys::Path(OutputFilename));
 180   }
 181
 182   try {
 183     switch (Action) {
 184     case PrintRecords:
 185       *Out << Records;           // No argument, dump all contents
 186       break;
 187     case GenEmitter:
 188       CodeEmitterGen(Records).run(*Out);
 189       break;
 190
 191     case GenRegisterEnums:
 192       RegisterInfoEmitter(Records).runEnums(*Out);
 193       break;
 194     case GenRegister:
 195       RegisterInfoEmitter(Records).run(*Out);
 196       break;
 197     case GenRegisterHeader:
 198       RegisterInfoEmitter(Records).runHeader(*Out);
 199       break;
 200     case GenInstrEnums:
 201       InstrEnumEmitter(Records).run(*Out);
 202       break;
 203     case GenInstrs:
 204       InstrInfoEmitter(Records).run(*Out);
 205       break;
 206     case GenCallingConv:
 207       CallingConvEmitter(Records).run(*Out);
 208       break;
 209     case GenAsmWriter:
 210       AsmWriterEmitter(Records).run(*Out);
 211       break;
 212     case GenClangDiagsDefs:
 213       ClangDiagsDefsEmitter(Records, ClangComponent).run(*Out);
 214       break;
 215     case GenClangDiagGroups:
 216       ClangDiagGroupsEmitter(Records).run(*Out);
 217       break;
 218     case GenDAGISel:
 219       DAGISelEmitter(Records).run(*Out);
 220       break;
 221     case GenFastISel:
 222       FastISelEmitter(Records).run(*Out);
 223       break;
 224     case GenSubtarget:
 225       SubtargetEmitter(Records).run(*Out);
 226       break;
 227     case GenIntrinsic:
 228       IntrinsicEmitter(Records).run(*Out);
 229       break;
 230     case GenTgtIntrinsic:
 231       IntrinsicEmitter(Records, true).run(*Out);
 232       break;
 233     case GenLLVMCConf:
 234       LLVMCConfigurationEmitter(Records).run(*Out);
 235       break;
 236     case PrintEnums:
 237     {
 238       std::vector<Record*> Recs = Records.getAllDerivedDefinitions(Class);
 239       for (unsigned i = 0, e = Recs.size(); i != e; ++i)
 240         *Out << Recs[i]->getName() << ", ";
 241       *Out << "\n";
 242       break;
 243     }
 244     default:
 245       assert(1 && "Invalid Action");
 246       return 1;
 247     }
 248
 249     if (Out != cout.stream())
 250       delete Out;                               // Close the file
 251     return 0;
 252
 253   } catch (const TGError &Error) {
 254     cerr << argv[0] << ": error:\n";
 255     PrintError(Error.getLoc(), Error.getMessage());
 256
 257   } catch (const std::string &Error) {
 258     cerr << argv[0] << ": " << Error << "\n";
 259   } catch (const char *Error) {
 260     cerr << argv[0] << ": " << Error << "\n";
 261   } catch (...) {
 262     cerr << argv[0] << ": Unknown unexpected exception occurred.\n";
 263   }
 264
 265   if (Out != cout.stream()) {
 266     delete Out;                             // Close the file
 267     std::remove(OutputFilename.c_str());    // Remove the file, it's broken
 268   }
 269   return 1;
 270 }