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1 //===- AsmWriterEmitter.h - Generate an assembly writer ---------*- 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 an assembly printer for the
11 // code generator.
12 //
13 //===----------------------------------------------------------------------===//
14 
15 #ifndef ASMWRITER_EMITTER_H
16 #define ASMWRITER_EMITTER_H
17 
18 #include "llvm/TableGen/TableGenBackend.h"
19 #include <map>
20 #include <vector>
21 #include <cassert>
22 
23 namespace llvm {
24   class AsmWriterInst;
25   class CodeGenInstruction;
26 
27   class AsmWriterEmitter : public TableGenBackend {
28     RecordKeeper &Records;
29     std::map<const CodeGenInstruction*, AsmWriterInst*> CGIAWIMap;
30     std::vector<const CodeGenInstruction*> NumberedInstructions;
31   public:
AsmWriterEmitter(RecordKeeper & R)32     AsmWriterEmitter(RecordKeeper &R) : Records(R) {}
33 
34     // run - Output the asmwriter, returning true on failure.
35     void run(raw_ostream &o);
36 
37 private:
38     void EmitPrintInstruction(raw_ostream &o);
39     void EmitGetRegisterName(raw_ostream &o);
40     void EmitGetInstructionName(raw_ostream &o);
41     void EmitRegIsInRegClass(raw_ostream &O);
42     void EmitPrintAliasInstruction(raw_ostream &O);
43 
getAsmWriterInstByID(unsigned ID)44     AsmWriterInst *getAsmWriterInstByID(unsigned ID) const {
45       assert(ID < NumberedInstructions.size());
46       std::map<const CodeGenInstruction*, AsmWriterInst*>::const_iterator I =
47         CGIAWIMap.find(NumberedInstructions[ID]);
48       assert(I != CGIAWIMap.end() && "Didn't find inst!");
49       return I->second;
50     }
51     void FindUniqueOperandCommands(std::vector<std::string> &UOC,
52                                    std::vector<unsigned> &InstIdxs,
53                                    std::vector<unsigned> &InstOpsUsed) const;
54   };
55 }
56 #endif
57