1 //===- TableGen.cpp - Top-Level TableGen implementation for LLVM ----------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file contains the main function for LLVM's TableGen.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #include "TableGenBackends.h" // Declares all backends.
15 
16 #include "SetTheory.h"
17 #include "llvm/Support/CommandLine.h"
18 #include "llvm/Support/PrettyStackTrace.h"
19 #include "llvm/Support/Signals.h"
20 #include "llvm/TableGen/Error.h"
21 #include "llvm/TableGen/Main.h"
22 #include "llvm/TableGen/Record.h"
23 
24 using namespace llvm;
25 
26 enum ActionType {
27   PrintRecords,
28   GenEmitter,
29   GenRegisterInfo,
30   GenInstrInfo,
31   GenAsmWriter,
32   GenAsmMatcher,
33   GenDisassembler,
34   GenPseudoLowering,
35   GenCallingConv,
36   GenDAGISel,
37   GenDFAPacketizer,
38   GenFastISel,
39   GenSubtarget,
40   GenIntrinsic,
41   GenTgtIntrinsic,
42   GenEDInfo,
43   PrintEnums,
44   PrintSets
45 };
46 
47 namespace {
48   cl::opt<ActionType>
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(GenRegisterInfo, "gen-register-info",
55                                "Generate registers and register classes info"),
56                     clEnumValN(GenInstrInfo, "gen-instr-info",
57                                "Generate instruction descriptions"),
58                     clEnumValN(GenCallingConv, "gen-callingconv",
59                                "Generate calling convention descriptions"),
60                     clEnumValN(GenAsmWriter, "gen-asm-writer",
61                                "Generate assembly writer"),
62                     clEnumValN(GenDisassembler, "gen-disassembler",
63                                "Generate disassembler"),
64                     clEnumValN(GenPseudoLowering, "gen-pseudo-lowering",
65                                "Generate pseudo instruction lowering"),
66                     clEnumValN(GenAsmMatcher, "gen-asm-matcher",
67                                "Generate assembly instruction matcher"),
68                     clEnumValN(GenDAGISel, "gen-dag-isel",
69                                "Generate a DAG instruction selector"),
70                     clEnumValN(GenDFAPacketizer, "gen-dfa-packetizer",
71                                "Generate DFA Packetizer for VLIW targets"),
72                     clEnumValN(GenFastISel, "gen-fast-isel",
73                                "Generate a \"fast\" instruction selector"),
74                     clEnumValN(GenSubtarget, "gen-subtarget",
75                                "Generate subtarget enumerations"),
76                     clEnumValN(GenIntrinsic, "gen-intrinsic",
77                                "Generate intrinsic information"),
78                     clEnumValN(GenTgtIntrinsic, "gen-tgt-intrinsic",
79                                "Generate target intrinsic information"),
80                     clEnumValN(GenEDInfo, "gen-enhanced-disassembly-info",
81                                "Generate enhanced disassembly info"),
82                     clEnumValN(PrintEnums, "print-enums",
83                                "Print enum values for a class"),
84                     clEnumValN(PrintSets, "print-sets",
85                                "Print expanded sets for testing DAG exprs"),
86                     clEnumValEnd));
87 
88   cl::opt<std::string>
89   Class("class", cl::desc("Print Enum list for this class"),
90           cl::value_desc("class name"));
91 
92 bool LLVMTableGenMain(raw_ostream &OS, RecordKeeper &Records) {
93   switch (Action) {
94   case PrintRecords:
95     OS << Records;           // No argument, dump all contents
96     break;
97   case GenEmitter:
98     EmitCodeEmitter(Records, OS);
99     break;
100   case GenRegisterInfo:
101     EmitRegisterInfo(Records, OS);
102     break;
103   case GenInstrInfo:
104     EmitInstrInfo(Records, OS);
105     break;
106   case GenCallingConv:
107     EmitCallingConv(Records, OS);
108     break;
109   case GenAsmWriter:
110     EmitAsmWriter(Records, OS);
111     break;
112   case GenAsmMatcher:
113     EmitAsmMatcher(Records, OS);
114     break;
115   case GenDisassembler:
116     EmitDisassembler(Records, OS);
117     break;
118   case GenPseudoLowering:
119     EmitPseudoLowering(Records, OS);
120     break;
121   case GenDAGISel:
122     EmitDAGISel(Records, OS);
123     break;
124   case GenDFAPacketizer:
125     EmitDFAPacketizer(Records, OS);
126     break;
127   case GenFastISel:
128     EmitFastISel(Records, OS);
129     break;
130   case GenSubtarget:
131     EmitSubtarget(Records, OS);
132     break;
133   case GenIntrinsic:
134     EmitIntrinsics(Records, OS);
135     break;
136   case GenTgtIntrinsic:
137     EmitIntrinsics(Records, OS, true);
138     break;
139   case GenEDInfo:
140     EmitEnhancedDisassemblerInfo(Records, OS);
141     break;
142   case PrintEnums:
143   {
144     std::vector<Record*> Recs = Records.getAllDerivedDefinitions(Class);
145     for (unsigned i = 0, e = Recs.size(); i != e; ++i)
146       OS << Recs[i]->getName() << ", ";
147     OS << "\n";
148     break;
149   }
150   case PrintSets:
151   {
152     SetTheory Sets;
153     Sets.addFieldExpander("Set", "Elements");
154     std::vector<Record*> Recs = Records.getAllDerivedDefinitions("Set");
155     for (unsigned i = 0, e = Recs.size(); i != e; ++i) {
156       OS << Recs[i]->getName() << " = [";
157       const std::vector<Record*> *Elts = Sets.expand(Recs[i]);
158       assert(Elts && "Couldn't expand Set instance");
159       for (unsigned ei = 0, ee = Elts->size(); ei != ee; ++ei)
160         OS << ' ' << (*Elts)[ei]->getName();
161       OS << " ]\n";
162     }
163     break;
164   }
165   }
166 
167   return false;
168 }
169 }
170 
171 int main(int argc, char **argv) {
172   sys::PrintStackTraceOnErrorSignal();
173   PrettyStackTraceProgram X(argc, argv);
174   cl::ParseCommandLineOptions(argc, argv);
175 
176   return TableGenMain(argv[0], &LLVMTableGenMain);
177 }
178