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 "FastISelEmitter.h"
33 #include "SubtargetEmitter.h"
34 #include "IntrinsicEmitter.h"
35 #include "LLVMCConfigurationEmitter.h"
45 GenRegisterEnums, GenRegister, GenRegisterHeader,
46 GenInstrEnums, GenInstrs, GenAsmWriter,
59 Action(cl::desc("Action to perform:"),
60 cl::values(clEnumValN(PrintRecords, "print-records",
61 "Print all records to stdout (default)"),
62 clEnumValN(GenEmitter, "gen-emitter",
63 "Generate machine code emitter"),
64 clEnumValN(GenRegisterEnums, "gen-register-enums",
65 "Generate enum values for registers"),
66 clEnumValN(GenRegister, "gen-register-desc",
67 "Generate a register info description"),
68 clEnumValN(GenRegisterHeader, "gen-register-desc-header",
69 "Generate a register info description header"),
70 clEnumValN(GenInstrEnums, "gen-instr-enums",
71 "Generate enum values for instructions"),
72 clEnumValN(GenInstrs, "gen-instr-desc",
73 "Generate instruction descriptions"),
74 clEnumValN(GenCallingConv, "gen-callingconv",
75 "Generate calling convention descriptions"),
76 clEnumValN(GenAsmWriter, "gen-asm-writer",
77 "Generate assembly writer"),
78 clEnumValN(GenDAGISel, "gen-dag-isel",
79 "Generate a DAG instruction selector"),
80 clEnumValN(GenFastISel, "gen-fast-isel",
81 "Generate a \"fast\" instruction selector"),
82 clEnumValN(GenSubtarget, "gen-subtarget",
83 "Generate subtarget enumerations"),
84 clEnumValN(GenIntrinsic, "gen-intrinsic",
85 "Generate intrinsic information"),
86 clEnumValN(GenTgtIntrinsic, "gen-tgt-intrinsic",
87 "Generate target intrinsic information"),
88 clEnumValN(GenLLVMCConf, "gen-llvmc",
89 "Generate LLVMC configuration library"),
90 clEnumValN(PrintEnums, "print-enums",
91 "Print enum values for a class"),
95 Class("class", cl::desc("Print Enum list for this class"),
96 cl::value_desc("class name"));
99 OutputFilename("o", cl::desc("Output filename"), cl::value_desc("filename"),
103 InputFilename(cl::Positional, cl::desc("<input file>"), cl::init("-"));
105 cl::list<std::string>
106 IncludeDirs("I", cl::desc("Directory of include files"),
107 cl::value_desc("directory"), cl::Prefix);
110 RecordKeeper llvm::Records;
112 /// ParseFile - this function begins the parsing of the specified tablegen
114 static bool ParseFile(const std::string &Filename,
115 const std::vector<std::string> &IncludeDirs) {
116 std::string ErrorStr;
117 MemoryBuffer *F = MemoryBuffer::getFileOrSTDIN(Filename.c_str(), &ErrorStr);
119 cerr << "Could not open input file '" + Filename + "': " << ErrorStr <<"\n";
125 // Record the location of the include directory so that the lexer can find
127 Parser.setIncludeDirs(IncludeDirs);
129 return Parser.ParseFile();
132 int main(int argc, char **argv) {
133 cl::ParseCommandLineOptions(argc, argv);
135 // Parse the input file.
136 if (ParseFile(InputFilename, IncludeDirs))
139 std::ostream *Out = cout.stream();
140 if (OutputFilename != "-") {
141 Out = new std::ofstream(OutputFilename.c_str());
144 cerr << argv[0] << ": error opening " << OutputFilename << "!\n";
148 // Make sure the file gets removed if *gasp* tablegen crashes...
149 sys::RemoveFileOnSignal(sys::Path(OutputFilename));
155 *Out << Records; // No argument, dump all contents
158 CodeEmitterGen(Records).run(*Out);
161 case GenRegisterEnums:
162 RegisterInfoEmitter(Records).runEnums(*Out);
165 RegisterInfoEmitter(Records).run(*Out);
167 case GenRegisterHeader:
168 RegisterInfoEmitter(Records).runHeader(*Out);
172 InstrEnumEmitter(Records).run(*Out);
175 InstrInfoEmitter(Records).run(*Out);
178 CallingConvEmitter(Records).run(*Out);
181 AsmWriterEmitter(Records).run(*Out);
185 DAGISelEmitter(Records).run(*Out);
188 FastISelEmitter(Records).run(*Out);
191 SubtargetEmitter(Records).run(*Out);
194 IntrinsicEmitter(Records).run(*Out);
196 case GenTgtIntrinsic:
197 IntrinsicEmitter(Records, true).run(*Out);
200 LLVMCConfigurationEmitter(Records).run(*Out);
204 std::vector<Record*> Recs = Records.getAllDerivedDefinitions(Class);
205 for (unsigned i = 0, e = Recs.size(); i != e; ++i)
206 *Out << Recs[i]->getName() << ", ";
211 assert(1 && "Invalid Action");
214 } catch (const std::string &Error) {
215 cerr << argv[0] << ": " << Error << "\n";
216 if (Out != cout.stream()) {
217 delete Out; // Close the file
218 std::remove(OutputFilename.c_str()); // Remove the file, it's broken
221 } catch (const char *Error) {
222 cerr << argv[0] << ": " << Error << "\n";
223 if (Out != cout.stream()) {
224 delete Out; // Close the file
225 std::remove(OutputFilename.c_str()); // Remove the file, it's broken
229 cerr << argv[0] << ": Unknown unexpected exception occurred.\n";
230 if (Out != cout.stream()) {
231 delete Out; // Close the file
232 std::remove(OutputFilename.c_str()); // Remove the file, it's broken
237 if (Out != cout.stream()) {
238 delete Out; // Close the file