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 "llvm/Support/PrettyStackTrace.h"
26 #include "CallingConvEmitter.h"
27 #include "CodeEmitterGen.h"
28 #include "RegisterInfoEmitter.h"
29 #include "InstrInfoEmitter.h"
30 #include "InstrEnumEmitter.h"
31 #include "AsmWriterEmitter.h"
32 #include "DAGISelEmitter.h"
33 #include "FastISelEmitter.h"
34 #include "SubtargetEmitter.h"
35 #include "IntrinsicEmitter.h"
36 #include "LLVMCConfigurationEmitter.h"
46 GenRegisterEnums, GenRegister, GenRegisterHeader,
47 GenInstrEnums, GenInstrs, GenAsmWriter,
60 Action(cl::desc("Action to perform:"),
61 cl::values(clEnumValN(PrintRecords, "print-records",
62 "Print all records to stdout (default)"),
63 clEnumValN(GenEmitter, "gen-emitter",
64 "Generate machine code emitter"),
65 clEnumValN(GenRegisterEnums, "gen-register-enums",
66 "Generate enum values for registers"),
67 clEnumValN(GenRegister, "gen-register-desc",
68 "Generate a register info description"),
69 clEnumValN(GenRegisterHeader, "gen-register-desc-header",
70 "Generate a register info description header"),
71 clEnumValN(GenInstrEnums, "gen-instr-enums",
72 "Generate enum values for instructions"),
73 clEnumValN(GenInstrs, "gen-instr-desc",
74 "Generate instruction descriptions"),
75 clEnumValN(GenCallingConv, "gen-callingconv",
76 "Generate calling convention descriptions"),
77 clEnumValN(GenAsmWriter, "gen-asm-writer",
78 "Generate assembly writer"),
79 clEnumValN(GenDAGISel, "gen-dag-isel",
80 "Generate a DAG instruction selector"),
81 clEnumValN(GenFastISel, "gen-fast-isel",
82 "Generate a \"fast\" instruction selector"),
83 clEnumValN(GenSubtarget, "gen-subtarget",
84 "Generate subtarget enumerations"),
85 clEnumValN(GenIntrinsic, "gen-intrinsic",
86 "Generate intrinsic information"),
87 clEnumValN(GenTgtIntrinsic, "gen-tgt-intrinsic",
88 "Generate target intrinsic information"),
89 clEnumValN(GenLLVMCConf, "gen-llvmc",
90 "Generate LLVMC configuration library"),
91 clEnumValN(PrintEnums, "print-enums",
92 "Print enum values for a class"),
96 Class("class", cl::desc("Print Enum list for this class"),
97 cl::value_desc("class name"));
100 OutputFilename("o", cl::desc("Output filename"), cl::value_desc("filename"),
104 InputFilename(cl::Positional, cl::desc("<input file>"), cl::init("-"));
106 cl::list<std::string>
107 IncludeDirs("I", cl::desc("Directory of include files"),
108 cl::value_desc("directory"), cl::Prefix);
112 // FIXME: Eliminate globals from tblgen.
113 RecordKeeper llvm::Records;
115 static TGSourceMgr SrcMgr;
117 void llvm::PrintError(TGLoc ErrorLoc, const std::string &Msg) {
118 SrcMgr.PrintError(ErrorLoc, Msg);
123 /// ParseFile - this function begins the parsing of the specified tablegen
125 static bool ParseFile(const std::string &Filename,
126 const std::vector<std::string> &IncludeDirs,
127 TGSourceMgr &SrcMgr) {
128 std::string ErrorStr;
129 MemoryBuffer *F = MemoryBuffer::getFileOrSTDIN(Filename.c_str(), &ErrorStr);
131 cerr << "Could not open input file '" + Filename + "': " << ErrorStr <<"\n";
135 // Tell SrcMgr about this buffer, which is what TGParser will pick up.
136 SrcMgr.AddNewSourceBuffer(F, TGLoc());
138 TGParser Parser(SrcMgr);
140 // Record the location of the include directory so that the lexer can find
142 Parser.setIncludeDirs(IncludeDirs);
144 return Parser.ParseFile();
147 int main(int argc, char **argv) {
148 sys::PrintStackTraceOnErrorSignal();
149 PrettyStackTraceProgram X(argc, argv);
150 cl::ParseCommandLineOptions(argc, argv);
153 // Parse the input file.
154 if (ParseFile(InputFilename, IncludeDirs, SrcMgr))
157 std::ostream *Out = cout.stream();
158 if (OutputFilename != "-") {
159 Out = new std::ofstream(OutputFilename.c_str());
162 cerr << argv[0] << ": error opening " << OutputFilename << "!\n";
166 // Make sure the file gets removed if *gasp* tablegen crashes...
167 sys::RemoveFileOnSignal(sys::Path(OutputFilename));
173 *Out << Records; // No argument, dump all contents
176 CodeEmitterGen(Records).run(*Out);
179 case GenRegisterEnums:
180 RegisterInfoEmitter(Records).runEnums(*Out);
183 RegisterInfoEmitter(Records).run(*Out);
185 case GenRegisterHeader:
186 RegisterInfoEmitter(Records).runHeader(*Out);
190 InstrEnumEmitter(Records).run(*Out);
193 InstrInfoEmitter(Records).run(*Out);
196 CallingConvEmitter(Records).run(*Out);
199 AsmWriterEmitter(Records).run(*Out);
203 DAGISelEmitter(Records).run(*Out);
206 FastISelEmitter(Records).run(*Out);
209 SubtargetEmitter(Records).run(*Out);
212 IntrinsicEmitter(Records).run(*Out);
214 case GenTgtIntrinsic:
215 IntrinsicEmitter(Records, true).run(*Out);
218 LLVMCConfigurationEmitter(Records).run(*Out);
222 std::vector<Record*> Recs = Records.getAllDerivedDefinitions(Class);
223 for (unsigned i = 0, e = Recs.size(); i != e; ++i)
224 *Out << Recs[i]->getName() << ", ";
229 assert(1 && "Invalid Action");
233 if (Out != cout.stream())
234 delete Out; // Close the file
237 } catch (const TGError &Error) {
238 cerr << argv[0] << ": error:\n";
239 PrintError(Error.getLoc(), Error.getMessage());
241 } catch (const std::string &Error) {
242 cerr << argv[0] << ": " << Error << "\n";
243 } catch (const char *Error) {
244 cerr << argv[0] << ": " << Error << "\n";
246 cerr << argv[0] << ": Unknown unexpected exception occurred.\n";
249 if (Out != cout.stream()) {
250 delete Out; // Close the file
251 std::remove(OutputFilename.c_str()); // Remove the file, it's broken