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 "AsmMatcherEmitter.h"
  19 #include "AsmWriterEmitter.h"
  20 #include "CallingConvEmitter.h"
  21 #include "ClangASTNodesEmitter.h"
  22 #include "ClangDiagnosticsEmitter.h"
  23 #include "CodeEmitterGen.h"
  24 #include "DAGISelEmitter.h"
  25 #include "DisassemblerEmitter.h"
  26 #include "EDEmitter.h"
  27 #include "FastISelEmitter.h"
  28 #include "InstrEnumEmitter.h"
  29 #include "InstrInfoEmitter.h"
  30 #include "IntrinsicEmitter.h"
  31 #include "LLVMCConfigurationEmitter.h"
  32 #include "OptParserEmitter.h"
  33 #include "Record.h"
  34 #include "RegisterInfoEmitter.h"
  35 #include "ARMDecoderEmitter.h"
  36 #include "SubtargetEmitter.h"
  37 #include "TGParser.h"
  38 #include "llvm/Support/CommandLine.h"
  39 #include "llvm/Support/MemoryBuffer.h"
  40 #include "llvm/Support/PrettyStackTrace.h"
  41 #include "llvm/Support/raw_ostream.h"
  42 #include "llvm/System/Signals.h"
  43 #include <algorithm>
  44 #include <cstdio>
  45 using namespace llvm;
  46
  47 enum ActionType {
  48   PrintRecords,
  49   GenEmitter,
  50   GenRegisterEnums, GenRegister, GenRegisterHeader,
  51   GenInstrEnums, GenInstrs, GenAsmWriter, GenAsmMatcher,
  52   GenARMDecoder,
  53   GenDisassembler,
  54   GenCallingConv,
  55   GenClangDiagsDefs,
  56   GenClangDiagGroups,
  57   GenClangStmtNodes,
  58   GenDAGISel,
  59   GenFastISel,
  60   GenOptParserDefs, GenOptParserImpl,
  61   GenSubtarget,
  62   GenIntrinsic,
  63   GenTgtIntrinsic,
  64   GenLLVMCConf,
  65   GenEDHeader, GenEDInfo,
  66   PrintEnums
  67 };
  68
  69 namespace {
  70   cl::opt<ActionType>
  71   Action(cl::desc("Action to perform:"),
  72          cl::values(clEnumValN(PrintRecords, "print-records",
  73                                "Print all records to stdout (default)"),
  74                     clEnumValN(GenEmitter, "gen-emitter",
  75                                "Generate machine code emitter"),
  76                     clEnumValN(GenRegisterEnums, "gen-register-enums",
  77                                "Generate enum values for registers"),
  78                     clEnumValN(GenRegister, "gen-register-desc",
  79                                "Generate a register info description"),
  80                     clEnumValN(GenRegisterHeader, "gen-register-desc-header",
  81                                "Generate a register info description header"),
  82                     clEnumValN(GenInstrEnums, "gen-instr-enums",
  83                                "Generate enum values for instructions"),
  84                     clEnumValN(GenInstrs, "gen-instr-desc",
  85                                "Generate instruction descriptions"),
  86                     clEnumValN(GenCallingConv, "gen-callingconv",
  87                                "Generate calling convention descriptions"),
  88                     clEnumValN(GenAsmWriter, "gen-asm-writer",
  89                                "Generate assembly writer"),
  90                     clEnumValN(GenARMDecoder, "gen-arm-decoder",
  91                                "Generate decoders for ARM/Thumb"),
  92                     clEnumValN(GenDisassembler, "gen-disassembler",
  93                                "Generate disassembler"),
  94                     clEnumValN(GenAsmMatcher, "gen-asm-matcher",
  95                                "Generate assembly instruction matcher"),
  96                     clEnumValN(GenDAGISel, "gen-dag-isel",
  97                                "Generate a DAG instruction selector"),
  98                     clEnumValN(GenFastISel, "gen-fast-isel",
  99                                "Generate a \"fast\" instruction selector"),
 100                     clEnumValN(GenOptParserDefs, "gen-opt-parser-defs",
 101                                "Generate option definitions"),
 102                     clEnumValN(GenOptParserImpl, "gen-opt-parser-impl",
 103                                "Generate option parser implementation"),
 104                     clEnumValN(GenSubtarget, "gen-subtarget",
 105                                "Generate subtarget enumerations"),
 106                     clEnumValN(GenIntrinsic, "gen-intrinsic",
 107                                "Generate intrinsic information"),
 108                     clEnumValN(GenTgtIntrinsic, "gen-tgt-intrinsic",
 109                                "Generate target intrinsic information"),
 110                     clEnumValN(GenClangDiagsDefs, "gen-clang-diags-defs",
 111                                "Generate Clang diagnostics definitions"),
 112                     clEnumValN(GenClangDiagGroups, "gen-clang-diag-groups",
 113                                "Generate Clang diagnostic groups"),
 114                     clEnumValN(GenClangStmtNodes, "gen-clang-stmt-nodes",
 115                                "Generate Clang AST statement nodes"),
 116                     clEnumValN(GenLLVMCConf, "gen-llvmc",
 117                                "Generate LLVMC configuration library"),
 118                     clEnumValN(GenEDHeader, "gen-enhanced-disassembly-header",
 119                                "Generate enhanced disassembly info header"),
 120                     clEnumValN(GenEDInfo, "gen-enhanced-disassembly-info",
 121                                "Generate enhanced disassembly info"),
 122                     clEnumValN(PrintEnums, "print-enums",
 123                                "Print enum values for a class"),
 124                     clEnumValEnd));
 125
 126   cl::opt<std::string>
 127   Class("class", cl::desc("Print Enum list for this class"),
 128         cl::value_desc("class name"));
 129
 130   cl::opt<std::string>
 131   OutputFilename("o", cl::desc("Output filename"), cl::value_desc("filename"),
 132                  cl::init("-"));
 133
 134   cl::opt<std::string>
 135   InputFilename(cl::Positional, cl::desc("<input file>"), cl::init("-"));
 136
 137   cl::list<std::string>
 138   IncludeDirs("I", cl::desc("Directory of include files"),
 139               cl::value_desc("directory"), cl::Prefix);
 140
 141   cl::opt<std::string>
 142   ClangComponent("clang-component",
 143                  cl::desc("Only use warnings from specified component"),
 144                  cl::value_desc("component"), cl::Hidden);
 145 }
 146
 147
 148 // FIXME: Eliminate globals from tblgen.
 149 RecordKeeper llvm::Records;
 150
 151 static SourceMgr SrcMgr;
 152
 153 void llvm::PrintError(SMLoc ErrorLoc, const std::string &Msg) {
 154   SrcMgr.PrintMessage(ErrorLoc, Msg, "error");
 155 }
 156
 157
 158
 159 /// ParseFile - this function begins the parsing of the specified tablegen
 160 /// file.
 161 static bool ParseFile(const std::string &Filename,
 162                       const std::vector<std::string> &IncludeDirs,
 163                       SourceMgr &SrcMgr) {
 164   std::string ErrorStr;
 165   MemoryBuffer *F = MemoryBuffer::getFileOrSTDIN(Filename.c_str(), &ErrorStr);
 166   if (F == 0) {
 167     errs() << "Could not open input file '" << Filename << "': "
 168            << ErrorStr <<"\n";
 169     return true;
 170   }
 171
 172   // Tell SrcMgr about this buffer, which is what TGParser will pick up.
 173   SrcMgr.AddNewSourceBuffer(F, SMLoc());
 174
 175   // Record the location of the include directory so that the lexer can find
 176   // it later.
 177   SrcMgr.setIncludeDirs(IncludeDirs);
 178
 179   TGParser Parser(SrcMgr);
 180
 181   return Parser.ParseFile();
 182 }
 183
 184 int main(int argc, char **argv) {
 185   sys::PrintStackTraceOnErrorSignal();
 186   PrettyStackTraceProgram X(argc, argv);
 187   cl::ParseCommandLineOptions(argc, argv);
 188
 189
 190   // Parse the input file.
 191   if (ParseFile(InputFilename, IncludeDirs, SrcMgr))
 192     return 1;
 193
 194   raw_ostream *Out = &outs();
 195   if (OutputFilename != "-") {
 196     std::string Error;
 197     Out = new raw_fd_ostream(OutputFilename.c_str(), Error);
 198
 199     if (!Error.empty()) {
 200       errs() << argv[0] << ": error opening " << OutputFilename
 201              << ":" << Error << "\n";
 202       return 1;
 203     }
 204
 205     // Make sure the file gets removed if *gasp* tablegen crashes...
 206     sys::RemoveFileOnSignal(sys::Path(OutputFilename));
 207   }
 208
 209   try {
 210     switch (Action) {
 211     case PrintRecords:
 212       *Out << Records;           // No argument, dump all contents
 213       break;
 214     case GenEmitter:
 215       CodeEmitterGen(Records).run(*Out);
 216       break;
 217
 218     case GenRegisterEnums:
 219       RegisterInfoEmitter(Records).runEnums(*Out);
 220       break;
 221     case GenRegister:
 222       RegisterInfoEmitter(Records).run(*Out);
 223       break;
 224     case GenRegisterHeader:
 225       RegisterInfoEmitter(Records).runHeader(*Out);
 226       break;
 227     case GenInstrEnums:
 228       InstrEnumEmitter(Records).run(*Out);
 229       break;
 230     case GenInstrs:
 231       InstrInfoEmitter(Records).run(*Out);
 232       break;
 233     case GenCallingConv:
 234       CallingConvEmitter(Records).run(*Out);
 235       break;
 236     case GenAsmWriter:
 237       AsmWriterEmitter(Records).run(*Out);
 238       break;
 239     case GenARMDecoder:
 240       ARMDecoderEmitter(Records).run(*Out);
 241       break;
 242     case GenAsmMatcher:
 243       AsmMatcherEmitter(Records).run(*Out);
 244       break;
 245     case GenClangDiagsDefs:
 246       ClangDiagsDefsEmitter(Records, ClangComponent).run(*Out);
 247       break;
 248     case GenClangDiagGroups:
 249       ClangDiagGroupsEmitter(Records).run(*Out);
 250       break;
 251     case GenClangStmtNodes:
 252       ClangStmtNodesEmitter(Records).run(*Out);
 253       break;
 254     case GenDisassembler:
 255       DisassemblerEmitter(Records).run(*Out);
 256       break;
 257     case GenOptParserDefs:
 258       OptParserEmitter(Records, true).run(*Out);
 259       break;
 260     case GenOptParserImpl:
 261       OptParserEmitter(Records, false).run(*Out);
 262       break;
 263     case GenDAGISel:
 264       DAGISelEmitter(Records).run(*Out);
 265       break;
 266     case GenFastISel:
 267       FastISelEmitter(Records).run(*Out);
 268       break;
 269     case GenSubtarget:
 270       SubtargetEmitter(Records).run(*Out);
 271       break;
 272     case GenIntrinsic:
 273       IntrinsicEmitter(Records).run(*Out);
 274       break;
 275     case GenTgtIntrinsic:
 276       IntrinsicEmitter(Records, true).run(*Out);
 277       break;
 278     case GenLLVMCConf:
 279       LLVMCConfigurationEmitter(Records).run(*Out);
 280       break;
 281     case GenEDHeader:
 282       EDEmitter(Records).runHeader(*Out);
 283       break;
 284     case GenEDInfo:
 285       EDEmitter(Records).run(*Out);
 286       break;
 287     case PrintEnums:
 288     {
 289       std::vector<Record*> Recs = Records.getAllDerivedDefinitions(Class);
 290       for (unsigned i = 0, e = Recs.size(); i != e; ++i)
 291         *Out << Recs[i]->getName() << ", ";
 292       *Out << "\n";
 293       break;
 294     }
 295     default:
 296       assert(1 && "Invalid Action");
 297       return 1;
 298     }
 299
 300     if (Out != &outs())
 301       delete Out;                               // Close the file
 302     return 0;
 303
 304   } catch (const TGError &Error) {
 305     errs() << argv[0] << ": error:\n";
 306     PrintError(Error.getLoc(), Error.getMessage());
 307
 308   } catch (const std::string &Error) {
 309     errs() << argv[0] << ": " << Error << "\n";
 310   } catch (const char *Error) {
 311     errs() << argv[0] << ": " << Error << "\n";
 312   } catch (...) {
 313     errs() << argv[0] << ": Unknown unexpected exception occurred.\n";
 314   }
 315
 316   if (Out != &outs()) {
 317     delete Out;                             // Close the file
 318     std::remove(OutputFilename.c_str());    // Remove the file, it's broken
 319   }
 320   return 1;
 321 }