63 lines
1.6 KiB
C++
63 lines
1.6 KiB
C++
//===- RDFCopy.h ------------------------------------------------*- 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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#ifndef LLVM_LIB_TARGET_HEXAGON_RDFCOPY_H
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#define LLVM_LIB_TARGET_HEXAGON_RDFCOPY_H
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#include "RDFGraph.h"
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#include "RDFLiveness.h"
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#include "RDFRegisters.h"
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#include "llvm/CodeGen/MachineFunction.h"
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#include <map>
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#include <vector>
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namespace llvm {
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class MachineBasicBlock;
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class MachineDominatorTree;
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class MachineInstr;
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namespace rdf {
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struct CopyPropagation {
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CopyPropagation(DataFlowGraph &dfg) : MDT(dfg.getDT()), DFG(dfg),
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L(dfg.getMF().getRegInfo(), dfg) {}
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virtual ~CopyPropagation() = default;
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bool run();
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void trace(bool On) { Trace = On; }
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bool trace() const { return Trace; }
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DataFlowGraph &getDFG() { return DFG; }
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using EqualityMap = std::map<RegisterRef, RegisterRef>;
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virtual bool interpretAsCopy(const MachineInstr *MI, EqualityMap &EM);
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private:
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const MachineDominatorTree &MDT;
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DataFlowGraph &DFG;
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Liveness L;
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bool Trace = false;
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// map: statement -> (map: dst reg -> src reg)
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std::map<NodeId, EqualityMap> CopyMap;
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std::vector<NodeId> Copies;
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void recordCopy(NodeAddr<StmtNode*> SA, EqualityMap &EM);
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bool scanBlock(MachineBasicBlock *B);
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NodeId getLocalReachingDef(RegisterRef RefRR, NodeAddr<InstrNode*> IA);
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};
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} // end namespace rdf
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} // end namespace llvm
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#endif // LLVM_LIB_TARGET_HEXAGON_RDFCOPY_H
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