1 //===- TableGen.cpp - Top-Level TableGen implementation -------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by the LLVM research group and is distributed under
6 // the University of Illinois Open Source 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 //===----------------------------------------------------------------------===//
19 #include "llvm/Support/CommandLine.h"
20 #include "llvm/Support/Streams.h"
21 #include "llvm/System/Signals.h"
22 #include "llvm/Support/FileUtilities.h"
23 #include "CodeEmitterGen.h"
24 #include "RegisterInfoEmitter.h"
25 #include "InstrInfoEmitter.h"
26 #include "AsmWriterEmitter.h"
27 #include "DAGISelEmitter.h"
28 #include "SubtargetEmitter.h"
29 #include "IntrinsicEmitter.h"
39 GenRegisterEnums, GenRegister, GenRegisterHeader,
40 GenInstrEnums, GenInstrs, GenAsmWriter,
49 Action(cl::desc("Action to perform:"),
50 cl::values(clEnumValN(PrintRecords, "print-records",
51 "Print all records to stdout (default)"),
52 clEnumValN(GenEmitter, "gen-emitter",
53 "Generate machine code emitter"),
54 clEnumValN(GenRegisterEnums, "gen-register-enums",
55 "Generate enum values for registers"),
56 clEnumValN(GenRegister, "gen-register-desc",
57 "Generate a register info description"),
58 clEnumValN(GenRegisterHeader, "gen-register-desc-header",
59 "Generate a register info description header"),
60 clEnumValN(GenInstrEnums, "gen-instr-enums",
61 "Generate enum values for instructions"),
62 clEnumValN(GenInstrs, "gen-instr-desc",
63 "Generate instruction descriptions"),
64 clEnumValN(GenAsmWriter, "gen-asm-writer",
65 "Generate assembly writer"),
66 clEnumValN(GenDAGISel, "gen-dag-isel",
67 "Generate a DAG instruction selector"),
68 clEnumValN(GenSubtarget, "gen-subtarget",
69 "Generate subtarget enumerations"),
70 clEnumValN(GenIntrinsic, "gen-intrinsic",
71 "Generate intrinsic information"),
72 clEnumValN(PrintEnums, "print-enums",
73 "Print enum values for a class"),
77 Class("class", cl::desc("Print Enum list for this class"),
78 cl::value_desc("class name"));
81 OutputFilename("o", cl::desc("Output filename"), cl::value_desc("filename"),
85 InputFilename(cl::Positional, cl::desc("<input file>"), cl::init("-"));
88 IncludeDirs("I", cl::desc("Directory of include files"),
89 cl::value_desc("directory"), cl::Prefix);
93 void ParseFile(const std::string &Filename,
94 const std::vector<std::string> &IncludeDirs);
97 RecordKeeper llvm::Records;
99 int main(int argc, char **argv) {
100 cl::ParseCommandLineOptions(argc, argv);
101 ParseFile(InputFilename, IncludeDirs);
103 std::ostream *Out = cout.stream();
104 if (OutputFilename != "-") {
105 Out = new std::ofstream(OutputFilename.c_str());
108 cerr << argv[0] << ": error opening " << OutputFilename << "!\n";
112 // Make sure the file gets removed if *gasp* tablegen crashes...
113 sys::RemoveFileOnSignal(sys::Path(OutputFilename));
119 *Out << Records; // No argument, dump all contents
122 CodeEmitterGen(Records).run(*Out);
125 case GenRegisterEnums:
126 RegisterInfoEmitter(Records).runEnums(*Out);
129 RegisterInfoEmitter(Records).run(*Out);
131 case GenRegisterHeader:
132 RegisterInfoEmitter(Records).runHeader(*Out);
136 InstrInfoEmitter(Records).runEnums(*Out);
139 InstrInfoEmitter(Records).run(*Out);
143 AsmWriterEmitter(Records).run(*Out);
147 DAGISelEmitter(Records).run(*Out);
150 SubtargetEmitter(Records).run(*Out);
153 IntrinsicEmitter(Records).run(*Out);
157 std::vector<Record*> Recs = Records.getAllDerivedDefinitions(Class);
158 for (unsigned i = 0, e = Recs.size(); i != e; ++i)
159 *Out << Recs[i]->getName() << ", ";
164 assert(1 && "Invalid Action");
167 } catch (const std::string &Error) {
168 cerr << argv[0] << ": " << Error << "\n";
169 if (Out != cout.stream()) {
170 delete Out; // Close the file
171 std::remove(OutputFilename.c_str()); // Remove the file, it's broken
175 cerr << argv[0] << ": Unknown unexpected exception occurred.\n";
176 if (Out != cout.stream()) {
177 delete Out; // Close the file
178 std::remove(OutputFilename.c_str()); // Remove the file, it's broken
183 if (Out != cout.stream()) {
184 delete Out; // Close the file