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e4c67cdab4
index for the input pattern in terms of the output pattern. Instead keep track of how many fixed operands the input pattern actually has, and have the input matching code pass the output-emitting function that index value. This simplifies the code, disentangles variables_ops from the support for predication operations, and makes variable_ops more robust. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51808 91177308-0d34-0410-b5e6-96231b3b80d8
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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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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