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 "CallingConvEmitter.h"
  21 #include "CodeEmitterGen.h"
  22 #include "RegisterInfoEmitter.h"
  23 #include "InstrInfoEmitter.h"
  24 #include "InstrEnumEmitter.h"
  25 #include "AsmWriterEmitter.h"
  26 #include "AsmMatcherEmitter.h"
  27 #include "DAGISelEmitter.h"
  28 #include "FastISelEmitter.h"
  29 #include "SubtargetEmitter.h"
  30 #include "IntrinsicEmitter.h"
  31 #include "LLVMCConfigurationEmitter.h"
  32 #include "ClangDiagnosticsEmitter.h"
  33 #include "llvm/Support/CommandLine.h"
  34 #include "llvm/Support/FileUtilities.h"
  35 #include "llvm/Support/MemoryBuffer.h"
  36 #include "llvm/Support/PrettyStackTrace.h"
  37 #include "llvm/Support/raw_ostream.h"
  38 #include "llvm/System/Signals.h"
  39 #include <algorithm>
  40 #include <cstdio>
  41 using namespace llvm;
  42
  43 enum ActionType {
  44   PrintRecords,
  45   GenEmitter,
  46   GenRegisterEnums, GenRegister, GenRegisterHeader,
  47   GenInstrEnums, GenInstrs, GenAsmWriter, GenAsmMatcher,
  48   GenCallingConv,
  49   GenClangDiagsDefs,
  50   GenClangDiagGroups,
  51   GenDAGISel,
  52   GenFastISel,
  53   GenSubtarget,
  54   GenIntrinsic,
  55   GenTgtIntrinsic,
  56   GenLLVMCConf,
  57   PrintEnums
  58 };
  59
  60 namespace {
  61   cl::opt<ActionType>
  62   Action(cl::desc("Action to perform:"),
  63          cl::values(clEnumValN(PrintRecords, "print-records",
  64                                "Print all records to stdout (default)"),
  65                     clEnumValN(GenEmitter, "gen-emitter",
  66                                "Generate machine code emitter"),
  67                     clEnumValN(GenRegisterEnums, "gen-register-enums",
  68                                "Generate enum values for registers"),
  69                     clEnumValN(GenRegister, "gen-register-desc",
  70                                "Generate a register info description"),
  71                     clEnumValN(GenRegisterHeader, "gen-register-desc-header",
  72                                "Generate a register info description header"),
  73                     clEnumValN(GenInstrEnums, "gen-instr-enums",
  74                                "Generate enum values for instructions"),
  75                     clEnumValN(GenInstrs, "gen-instr-desc",
  76                                "Generate instruction descriptions"),
  77                     clEnumValN(GenCallingConv, "gen-callingconv",
  78                                "Generate calling convention descriptions"),
  79                     clEnumValN(GenAsmWriter, "gen-asm-writer",
  80                                "Generate assembly writer"),
  81                     clEnumValN(GenAsmMatcher, "gen-asm-matcher",
  82                                "Generate assembly instruction matcher"),
  83                     clEnumValN(GenDAGISel, "gen-dag-isel",
  84                                "Generate a DAG instruction selector"),
  85                     clEnumValN(GenFastISel, "gen-fast-isel",
  86                                "Generate a \"fast\" instruction selector"),
  87                     clEnumValN(GenSubtarget, "gen-subtarget",
  88                                "Generate subtarget enumerations"),
  89                     clEnumValN(GenIntrinsic, "gen-intrinsic",
  90                                "Generate intrinsic information"),
  91                     clEnumValN(GenTgtIntrinsic, "gen-tgt-intrinsic",
  92                                "Generate target intrinsic information"),
  93                     clEnumValN(GenClangDiagsDefs, "gen-clang-diags-defs",
  94                                "Generate Clang diagnostics definitions"),
  95                     clEnumValN(GenClangDiagGroups, "gen-clang-diag-groups",
  96                                "Generate Clang diagnostic groups"),
  97                     clEnumValN(GenLLVMCConf, "gen-llvmc",
  98                                "Generate LLVMC configuration library"),
  99                     clEnumValN(PrintEnums, "print-enums",
 100                                "Print enum values for a class"),
 101                     clEnumValEnd));
 102
 103   cl::opt<std::string>
 104   Class("class", cl::desc("Print Enum list for this class"),
 105         cl::value_desc("class name"));
 106
 107   cl::opt<std::string>
 108   OutputFilename("o", cl::desc("Output filename"), cl::value_desc("filename"),
 109                  cl::init("-"));
 110
 111   cl::opt<std::string>
 112   InputFilename(cl::Positional, cl::desc("<input file>"), cl::init("-"));
 113
 114   cl::list<std::string>
 115   IncludeDirs("I", cl::desc("Directory of include files"),
 116               cl::value_desc("directory"), cl::Prefix);
 117
 118   cl::opt<std::string>
 119   ClangComponent("clang-component",
 120                  cl::desc("Only use warnings from specified component"),
 121                  cl::value_desc("component"), cl::Hidden);
 122 }
 123
 124
 125 // FIXME: Eliminate globals from tblgen.
 126 RecordKeeper llvm::Records;
 127
 128 static SourceMgr SrcMgr;
 129
 130 void llvm::PrintError(SMLoc ErrorLoc, const std::string &Msg) {
 131   SrcMgr.PrintMessage(ErrorLoc, Msg, "error");
 132 }
 133
 134
 135
 136 /// ParseFile - this function begins the parsing of the specified tablegen
 137 /// file.
 138 static bool ParseFile(const std::string &Filename,
 139                       const std::vector<std::string> &IncludeDirs,
 140                       SourceMgr &SrcMgr) {
 141   std::string ErrorStr;
 142   MemoryBuffer *F = MemoryBuffer::getFileOrSTDIN(Filename.c_str(), &ErrorStr);
 143   if (F == 0) {
 144     errs() << "Could not open input file '" << Filename << "': "
 145            << ErrorStr <<"\n";
 146     return true;
 147   }
 148
 149   // Tell SrcMgr about this buffer, which is what TGParser will pick up.
 150   SrcMgr.AddNewSourceBuffer(F, SMLoc());
 151
 152   // Record the location of the include directory so that the lexer can find
 153   // it later.
 154   SrcMgr.setIncludeDirs(IncludeDirs);
 155
 156   TGParser Parser(SrcMgr);
 157
 158   return Parser.ParseFile();
 159 }
 160
 161 int main(int argc, char **argv) {
 162   sys::PrintStackTraceOnErrorSignal();
 163   PrettyStackTraceProgram X(argc, argv);
 164   cl::ParseCommandLineOptions(argc, argv);
 165
 166
 167   // Parse the input file.
 168   if (ParseFile(InputFilename, IncludeDirs, SrcMgr))
 169     return 1;
 170
 171   raw_ostream *Out = &outs();
 172   if (OutputFilename != "-") {
 173     std::string Error;
 174     Out = new raw_fd_ostream(OutputFilename.c_str(), Error);
 175
 176     if (!Error.empty()) {
 177       errs() << argv[0] << ": error opening " << OutputFilename
 178              << ":" << Error << "\n";
 179       return 1;
 180     }
 181
 182     // Make sure the file gets removed if *gasp* tablegen crashes...
 183     sys::RemoveFileOnSignal(sys::Path(OutputFilename));
 184   }
 185
 186   try {
 187     switch (Action) {
 188     case PrintRecords:
 189       *Out << Records;           // No argument, dump all contents
 190       break;
 191     case GenEmitter:
 192       CodeEmitterGen(Records).run(*Out);
 193       break;
 194
 195     case GenRegisterEnums:
 196       RegisterInfoEmitter(Records).runEnums(*Out);
 197       break;
 198     case GenRegister:
 199       RegisterInfoEmitter(Records).run(*Out);
 200       break;
 201     case GenRegisterHeader:
 202       RegisterInfoEmitter(Records).runHeader(*Out);
 203       break;
 204     case GenInstrEnums:
 205       InstrEnumEmitter(Records).run(*Out);
 206       break;
 207     case GenInstrs:
 208       InstrInfoEmitter(Records).run(*Out);
 209       break;
 210     case GenCallingConv:
 211       CallingConvEmitter(Records).run(*Out);
 212       break;
 213     case GenAsmWriter:
 214       AsmWriterEmitter(Records).run(*Out);
 215       break;
 216     case GenAsmMatcher:
 217       AsmMatcherEmitter(Records).run(*Out);
 218       break;
 219     case GenClangDiagsDefs:
 220       ClangDiagsDefsEmitter(Records, ClangComponent).run(*Out);
 221       break;
 222     case GenClangDiagGroups:
 223       ClangDiagGroupsEmitter(Records).run(*Out);
 224       break;
 225     case GenDAGISel:
 226       DAGISelEmitter(Records).run(*Out);
 227       break;
 228     case GenFastISel:
 229       FastISelEmitter(Records).run(*Out);
 230       break;
 231     case GenSubtarget:
 232       SubtargetEmitter(Records).run(*Out);
 233       break;
 234     case GenIntrinsic:
 235       IntrinsicEmitter(Records).run(*Out);
 236       break;
 237     case GenTgtIntrinsic:
 238       IntrinsicEmitter(Records, true).run(*Out);
 239       break;
 240     case GenLLVMCConf:
 241       LLVMCConfigurationEmitter(Records).run(*Out);
 242       break;
 243     case PrintEnums:
 244     {
 245       std::vector<Record*> Recs = Records.getAllDerivedDefinitions(Class);
 246       for (unsigned i = 0, e = Recs.size(); i != e; ++i)
 247         *Out << Recs[i]->getName() << ", ";
 248       *Out << "\n";
 249       break;
 250     }
 251     default:
 252       assert(1 && "Invalid Action");
 253       return 1;
 254     }
 255
 256     if (Out != &outs())
 257       delete Out;                               // Close the file
 258     return 0;
 259
 260   } catch (const TGError &Error) {
 261     errs() << argv[0] << ": error:\n";
 262     PrintError(Error.getLoc(), Error.getMessage());
 263
 264   } catch (const std::string &Error) {
 265     errs() << argv[0] << ": " << Error << "\n";
 266   } catch (const char *Error) {
 267     errs() << argv[0] << ": " << Error << "\n";
 268   } catch (...) {
 269     errs() << argv[0] << ": Unknown unexpected exception occurred.\n";
 270   }
 271
 272   if (Out != &outs()) {
 273     delete Out;                             // Close the file
 274     std::remove(OutputFilename.c_str());    // Remove the file, it's broken
 275   }
 276   return 1;
 277 }