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57 lines
1.8 KiB
C++
57 lines
1.8 KiB
C++
//===- DAGISelEmitter.h - Generate an instruction selector ------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This tablegen backend emits a DAG instruction selector.
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//
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//===----------------------------------------------------------------------===//
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#ifndef DAGISEL_EMITTER_H
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#define DAGISEL_EMITTER_H
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#include "TableGenBackend.h"
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#include "CodeGenDAGPatterns.h"
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#include <set>
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namespace llvm {
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/// DAGISelEmitter - The top-level class which coordinates construction
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/// and emission of the instruction selector.
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///
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class DAGISelEmitter : public TableGenBackend {
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RecordKeeper &Records;
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CodeGenDAGPatterns CGP;
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public:
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explicit DAGISelEmitter(RecordKeeper &R) : Records(R), CGP(R) {}
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// run - Output the isel, returning true on failure.
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void run(std::ostream &OS);
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private:
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void EmitNodeTransforms(std::ostream &OS);
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void EmitPredicateFunctions(std::ostream &OS);
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void GenerateCodeForPattern(const PatternToMatch &Pattern,
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std::vector<std::pair<unsigned, std::string> > &GeneratedCode,
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std::set<std::string> &GeneratedDecl,
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std::vector<std::string> &TargetOpcodes,
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std::vector<std::string> &TargetVTs,
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bool &OutputIsVariadic,
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unsigned &NumInputRootOps);
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void EmitPatterns(std::vector<std::pair<const PatternToMatch*,
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std::vector<std::pair<unsigned, std::string> > > > &Patterns,
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unsigned Indent, std::ostream &OS);
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void EmitInstructionSelector(std::ostream &OS);
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};
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} // End llvm namespace
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#endif
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