1 //===- InstrInfoEmitter.h - Generate a Instruction Set Desc. ----*- C++ -*-===//
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 tablegen backend is responsible for emitting a description of the target
11 // instruction set for the code generator.
12 //
13 //===----------------------------------------------------------------------===//
14 
15 #ifndef INSTRINFO_EMITTER_H
16 #define INSTRINFO_EMITTER_H
17 
18 #include "CodeGenDAGPatterns.h"
19 #include "llvm/TableGen/TableGenBackend.h"
20 #include <vector>
21 #include <map>
22 
23 namespace llvm {
24 
25 class StringInit;
26 class IntInit;
27 class ListInit;
28 class CodeGenInstruction;
29 
30 class InstrInfoEmitter : public TableGenBackend {
31   RecordKeeper &Records;
32   CodeGenDAGPatterns CDP;
33   std::map<std::string, unsigned> ItinClassMap;
34 
35 public:
InstrInfoEmitter(RecordKeeper & R)36   InstrInfoEmitter(RecordKeeper &R) : Records(R), CDP(R) { }
37 
38   // run - Output the instruction set description, returning true on failure.
39   void run(raw_ostream &OS);
40 
41 private:
42   void emitEnums(raw_ostream &OS);
43 
44   typedef std::map<std::vector<std::string>, unsigned> OperandInfoMapTy;
45   void emitRecord(const CodeGenInstruction &Inst, unsigned Num,
46                   Record *InstrInfo,
47                   std::map<std::vector<Record*>, unsigned> &EL,
48                   const OperandInfoMapTy &OpInfo,
49                   raw_ostream &OS);
50 
51   // Itinerary information.
52   void GatherItinClasses();
53   unsigned getItinClassNumber(const Record *InstRec);
54 
55   // Operand information.
56   void EmitOperandInfo(raw_ostream &OS, OperandInfoMapTy &OperandInfoIDs);
57   std::vector<std::string> GetOperandInfo(const CodeGenInstruction &Inst);
58 };
59 
60 } // End llvm namespace
61 
62 #endif
63