| 1 | //===- RDFCopy.h ------------------------------------------------*- C++ -*-===// |
|---|---|
| 2 | // |
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | |
| 9 | #ifndef LLVM_LIB_TARGET_HEXAGON_RDFCOPY_H |
| 10 | #define LLVM_LIB_TARGET_HEXAGON_RDFCOPY_H |
| 11 | |
| 12 | #include "llvm/CodeGen/RDFGraph.h" |
| 13 | #include "llvm/CodeGen/RDFLiveness.h" |
| 14 | #include "llvm/CodeGen/RDFRegisters.h" |
| 15 | #include "llvm/CodeGen/MachineFunction.h" |
| 16 | #include <map> |
| 17 | #include <vector> |
| 18 | |
| 19 | namespace llvm { |
| 20 | |
| 21 | class MachineBasicBlock; |
| 22 | class MachineDominatorTree; |
| 23 | class MachineInstr; |
| 24 | |
| 25 | namespace rdf { |
| 26 | |
| 27 | struct CopyPropagation { |
| 28 | CopyPropagation(DataFlowGraph &dfg) : MDT(dfg.getDT()), DFG(dfg), |
| 29 | RDefMap(std::less<RegisterRef>(DFG.getPRI())) {} |
| 30 | |
| 31 | virtual ~CopyPropagation() = default; |
| 32 | |
| 33 | bool run(); |
| 34 | void trace(bool On) { Trace = On; } |
| 35 | bool trace() const { return Trace; } |
| 36 | DataFlowGraph &getDFG() { return DFG; } |
| 37 | |
| 38 | using EqualityMap = std::map<RegisterRef, RegisterRef>; |
| 39 | virtual bool interpretAsCopy(const MachineInstr *MI, EqualityMap &EM); |
| 40 | |
| 41 | private: |
| 42 | const MachineDominatorTree &MDT; |
| 43 | DataFlowGraph &DFG; |
| 44 | DataFlowGraph::DefStackMap DefM; |
| 45 | bool Trace = false; |
| 46 | |
| 47 | // map: register -> (map: stmt -> reaching def) |
| 48 | std::map<RegisterRef,std::map<NodeId,NodeId>> RDefMap; |
| 49 | // map: statement -> (map: dst reg -> src reg) |
| 50 | std::map<NodeId, EqualityMap> CopyMap; |
| 51 | std::vector<NodeId> Copies; |
| 52 | |
| 53 | void recordCopy(NodeAddr<StmtNode*> SA, EqualityMap &EM); |
| 54 | void updateMap(NodeAddr<InstrNode*> IA); |
| 55 | bool scanBlock(MachineBasicBlock *B); |
| 56 | }; |
| 57 | |
| 58 | } // end namespace rdf |
| 59 | |
| 60 | } // end namespace llvm |
| 61 | |
| 62 | #endif // LLVM_LIB_TARGET_HEXAGON_RDFCOPY_H |
| 63 |