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/System/Signals.h"
21 #include "llvm/Support/FileUtilities.h"
22 #include "CodeEmitterGen.h"
23 #include "RegisterInfoEmitter.h"
24 #include "InstrInfoEmitter.h"
25 #include "AsmWriterEmitter.h"
26 #include "DAGISelEmitter.h"
27 #include "SubtargetEmitter.h"
28 #include "IntrinsicEmitter.h"
38 GenRegisterEnums, GenRegister, GenRegisterHeader,
39 GenInstrEnums, GenInstrs, GenAsmWriter,
48 Action(cl::desc("Action to perform:"),
49 cl::values(clEnumValN(PrintRecords, "print-records",
50 "Print all records to stdout (default)"),
51 clEnumValN(GenEmitter, "gen-emitter",
52 "Generate machine code emitter"),
53 clEnumValN(GenRegisterEnums, "gen-register-enums",
54 "Generate enum values for registers"),
55 clEnumValN(GenRegister, "gen-register-desc",
56 "Generate a register info description"),
57 clEnumValN(GenRegisterHeader, "gen-register-desc-header",
58 "Generate a register info description header"),
59 clEnumValN(GenInstrEnums, "gen-instr-enums",
60 "Generate enum values for instructions"),
61 clEnumValN(GenInstrs, "gen-instr-desc",
62 "Generate instruction descriptions"),
63 clEnumValN(GenAsmWriter, "gen-asm-writer",
64 "Generate assembly writer"),
65 clEnumValN(GenDAGISel, "gen-dag-isel",
66 "Generate a DAG instruction selector"),
67 clEnumValN(GenSubtarget, "gen-subtarget",
68 "Generate subtarget enumerations"),
69 clEnumValN(GenIntrinsic, "gen-intrinsic",
70 "Generate intrinsic information"),
71 clEnumValN(PrintEnums, "print-enums",
72 "Print enum values for a class"),
76 Class("class", cl::desc("Print Enum list for this class"),
77 cl::value_desc("class name"));
80 OutputFilename("o", cl::desc("Output filename"), cl::value_desc("filename"),
84 InputFilename(cl::Positional, cl::desc("<input file>"), cl::init("-"));
87 IncludeDirs("I", cl::desc("Directory of include files"),
88 cl::value_desc("directory"), cl::Prefix);
92 void ParseFile(const std::string &Filename,
93 const std::vector<std::string> &IncludeDirs);
96 RecordKeeper llvm::Records;
98 int main(int argc, char **argv) {
99 cl::ParseCommandLineOptions(argc, argv);
100 ParseFile(InputFilename, IncludeDirs);
102 std::ostream *Out = &std::cout;
103 if (OutputFilename != "-") {
104 Out = new std::ofstream(OutputFilename.c_str());
107 std::cerr << argv[0] << ": error opening " << OutputFilename << "!\n";
111 // Make sure the file gets removed if *gasp* tablegen crashes...
112 sys::RemoveFileOnSignal(sys::Path(OutputFilename));
118 *Out << Records; // No argument, dump all contents
121 CodeEmitterGen(Records).run(*Out);
124 case GenRegisterEnums:
125 RegisterInfoEmitter(Records).runEnums(*Out);
128 RegisterInfoEmitter(Records).run(*Out);
130 case GenRegisterHeader:
131 RegisterInfoEmitter(Records).runHeader(*Out);
135 InstrInfoEmitter(Records).runEnums(*Out);
138 InstrInfoEmitter(Records).run(*Out);
142 AsmWriterEmitter(Records).run(*Out);
146 DAGISelEmitter(Records).run(*Out);
149 SubtargetEmitter(Records).run(*Out);
152 IntrinsicEmitter(Records).run(*Out);
156 std::vector<Record*> Recs = Records.getAllDerivedDefinitions(Class);
157 for (unsigned i = 0, e = Recs.size(); i != e; ++i)
158 *Out << Recs[i]->getName() << ", ";
163 assert(1 && "Invalid Action");
166 } catch (const std::string &Error) {
167 std::cerr << argv[0] << ": " << Error << "\n";
168 if (Out != &std::cout) {
169 delete Out; // Close the file
170 std::remove(OutputFilename.c_str()); // Remove the file, it's broken
174 std::cerr << argv[0] << ": Unknown unexpected exception occurred.\n";
175 if (Out != &std::cout) {
176 delete Out; // Close the file
177 std::remove(OutputFilename.c_str()); // Remove the file, it's broken
182 if (Out != &std::cout) {
183 delete Out; // Close the file