1 //===- InstrInfoEmitter.h - Generate a Instruction Set Desc. ----*- C++ -*-===//
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 // This tablegen backend is responsible for emitting a description of the target
11 // instruction set for the code generator.
13 //===----------------------------------------------------------------------===//
15 #ifndef INSTRINFO_EMITTER_H
16 #define INSTRINFO_EMITTER_H
18 #include "TableGenBackend.h"
19 #include "CodeGenDAGPatterns.h"
28 class CodeGenInstruction;
30 class InstrInfoEmitter : public TableGenBackend {
31 RecordKeeper &Records;
32 CodeGenDAGPatterns CDP;
33 std::map<std::string, unsigned> ItinClassMap;
36 InstrInfoEmitter(RecordKeeper &R) : Records(R), CDP(R) { }
38 // run - Output the instruction set description, returning true on failure.
39 void run(std::ostream &OS);
42 typedef std::map<std::vector<std::string>, unsigned> OperandInfoMapTy;
44 void emitRecord(const CodeGenInstruction &Inst, unsigned Num,
46 std::map<std::vector<Record*>, unsigned> &EL,
47 std::map<Record*, unsigned> &BM,
48 const OperandInfoMapTy &OpInfo,
50 void emitShiftedValue(Record *R, StringInit *Val, IntInit *Shift,
53 // Itinerary information.
54 void GatherItinClasses();
55 unsigned getItinClassNumber(const Record *InstRec);
57 // Operand information.
58 void EmitOperandInfo(std::ostream &OS, OperandInfoMapTy &OperandInfoIDs);
59 std::vector<std::string> GetOperandInfo(const CodeGenInstruction &Inst);
61 void DetectRegisterClassBarriers(std::vector<Record*> &Defs,
62 const std::vector<CodeGenRegisterClass> &RCs,
63 std::vector<Record*> &Barriers);
66 } // End llvm namespace