1 //===- TableGen.cpp - Top-Level TableGen implementation -------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
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.
16 //===----------------------------------------------------------------------===//
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 "CallingConvEmitter.h"
26 #include "CodeEmitterGen.h"
27 #include "RegisterInfoEmitter.h"
28 #include "InstrInfoEmitter.h"
29 #include "InstrEnumEmitter.h"
30 #include "AsmWriterEmitter.h"
31 #include "DAGISelEmitter.h"
32 #include "SubtargetEmitter.h"
33 #include "IntrinsicEmitter.h"
34 #include "LLVMCConfigurationEmitter.h"
44 GenRegisterEnums, GenRegister, GenRegisterHeader,
45 GenInstrEnums, GenInstrs, GenAsmWriter,
56 Action(cl::desc("Action to perform:"),
57 cl::values(clEnumValN(PrintRecords, "print-records",
58 "Print all records to stdout (default)"),
59 clEnumValN(GenEmitter, "gen-emitter",
60 "Generate machine code emitter"),
61 clEnumValN(GenRegisterEnums, "gen-register-enums",
62 "Generate enum values for registers"),
63 clEnumValN(GenRegister, "gen-register-desc",
64 "Generate a register info description"),
65 clEnumValN(GenRegisterHeader, "gen-register-desc-header",
66 "Generate a register info description header"),
67 clEnumValN(GenInstrEnums, "gen-instr-enums",
68 "Generate enum values for instructions"),
69 clEnumValN(GenInstrs, "gen-instr-desc",
70 "Generate instruction descriptions"),
71 clEnumValN(GenCallingConv, "gen-callingconv",
72 "Generate calling convention descriptions"),
73 clEnumValN(GenAsmWriter, "gen-asm-writer",
74 "Generate assembly writer"),
75 clEnumValN(GenDAGISel, "gen-dag-isel",
76 "Generate a DAG instruction selector"),
77 clEnumValN(GenSubtarget, "gen-subtarget",
78 "Generate subtarget enumerations"),
79 clEnumValN(GenIntrinsic, "gen-intrinsic",
80 "Generate intrinsic information"),
81 clEnumValN(GenLLVMCConf, "gen-llvmc",
82 "Generate LLVMC configuration library"),
83 clEnumValN(PrintEnums, "print-enums",
84 "Print enum values for a class"),
88 Class("class", cl::desc("Print Enum list for this class"),
89 cl::value_desc("class name"));
92 OutputFilename("o", cl::desc("Output filename"), cl::value_desc("filename"),
96 InputFilename(cl::Positional, cl::desc("<input file>"), cl::init("-"));
99 IncludeDirs("I", cl::desc("Directory of include files"),
100 cl::value_desc("directory"), cl::Prefix);
103 RecordKeeper llvm::Records;
105 /// ParseFile - this function begins the parsing of the specified tablegen
107 static bool ParseFile(const std::string &Filename,
108 const std::vector<std::string> &IncludeDirs) {
109 std::string ErrorStr;
110 MemoryBuffer *F = MemoryBuffer::getFileOrSTDIN(Filename.c_str(), &ErrorStr);
112 cerr << "Could not open input file '" + Filename + "': " << ErrorStr <<"\n";
118 // Record the location of the include directory so that the lexer can find
120 Parser.setIncludeDirs(IncludeDirs);
122 return Parser.ParseFile();
125 int main(int argc, char **argv) {
126 cl::ParseCommandLineOptions(argc, argv);
128 // Parse the input file.
129 if (ParseFile(InputFilename, IncludeDirs))
132 std::ostream *Out = cout.stream();
133 if (OutputFilename != "-") {
134 Out = new std::ofstream(OutputFilename.c_str());
137 cerr << argv[0] << ": error opening " << OutputFilename << "!\n";
141 // Make sure the file gets removed if *gasp* tablegen crashes...
142 sys::RemoveFileOnSignal(sys::Path(OutputFilename));
148 *Out << Records; // No argument, dump all contents
151 CodeEmitterGen(Records).run(*Out);
154 case GenRegisterEnums:
155 RegisterInfoEmitter(Records).runEnums(*Out);
158 RegisterInfoEmitter(Records).run(*Out);
160 case GenRegisterHeader:
161 RegisterInfoEmitter(Records).runHeader(*Out);
165 InstrEnumEmitter(Records).run(*Out);
168 InstrInfoEmitter(Records).run(*Out);
171 CallingConvEmitter(Records).run(*Out);
174 AsmWriterEmitter(Records).run(*Out);
178 DAGISelEmitter(Records).run(*Out);
181 SubtargetEmitter(Records).run(*Out);
184 IntrinsicEmitter(Records).run(*Out);
187 LLVMCConfigurationEmitter(Records).run(*Out);
191 std::vector<Record*> Recs = Records.getAllDerivedDefinitions(Class);
192 for (unsigned i = 0, e = Recs.size(); i != e; ++i)
193 *Out << Recs[i]->getName() << ", ";
198 assert(1 && "Invalid Action");
201 } catch (const std::string &Error) {
202 cerr << argv[0] << ": " << Error << "\n";
203 if (Out != cout.stream()) {
204 delete Out; // Close the file
205 std::remove(OutputFilename.c_str()); // Remove the file, it's broken
209 cerr << argv[0] << ": Unknown unexpected exception occurred.\n";
210 if (Out != cout.stream()) {
211 delete Out; // Close the file
212 std::remove(OutputFilename.c_str()); // Remove the file, it's broken
217 if (Out != cout.stream()) {
218 delete Out; // Close the file