forked from OSchip/llvm-project
102 lines
2.6 KiB
C++
102 lines
2.6 KiB
C++
//===-- llvm/CodeGen/Splitter.h - Splitter -*- 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_CODEGEN_SPLITTER_H
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#define LLVM_CODEGEN_SPLITTER_H
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#include "llvm/CodeGen/MachineFunctionPass.h"
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#include "llvm/CodeGen/MachineLoopInfo.h"
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#include "llvm/CodeGen/SlotIndexes.h"
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#include <deque>
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#include <map>
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#include <string>
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#include <vector>
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namespace llvm {
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class LiveInterval;
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class LiveIntervals;
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struct LiveRange;
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class LoopSplit;
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class MachineDominatorTree;
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class MachineRegisterInfo;
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class SlotIndexes;
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class TargetInstrInfo;
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class VNInfo;
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class LoopSplitter : public MachineFunctionPass {
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friend class LoopSplit;
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public:
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static char ID;
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LoopSplitter() : MachineFunctionPass(ID) {
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initializeLoopSplitterPass(*PassRegistry::getPassRegistry());
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}
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virtual void getAnalysisUsage(AnalysisUsage &au) const;
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virtual bool runOnMachineFunction(MachineFunction &fn);
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virtual void releaseMemory();
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private:
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MachineFunction *mf;
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LiveIntervals *lis;
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MachineLoopInfo *mli;
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MachineRegisterInfo *mri;
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MachineDominatorTree *mdt;
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SlotIndexes *sis;
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const TargetInstrInfo *tii;
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const TargetRegisterInfo *tri;
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std::string fqn;
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std::deque<LiveInterval*> intervals;
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typedef std::pair<SlotIndex, SlotIndex> SlotPair;
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typedef std::vector<SlotPair> LoopRanges;
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typedef std::map<MachineLoop*, LoopRanges> LoopRangeMap;
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LoopRangeMap loopRangeMap;
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void dumpLoopInfo(MachineLoop &loop);
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void dumpOddTerminators();
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void updateTerminators(MachineBasicBlock &mbb);
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bool canInsertPreHeader(MachineLoop &loop);
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MachineBasicBlock& insertPreHeader(MachineLoop &loop);
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bool isCriticalEdge(MachineLoop::Edge &edge);
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bool canSplitEdge(MachineLoop::Edge &edge);
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MachineBasicBlock& splitEdge(MachineLoop::Edge &edge, MachineLoop &loop);
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LoopRanges& getLoopRanges(MachineLoop &loop);
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std::pair<bool, SlotPair> getLoopSubRange(const LiveRange &lr,
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MachineLoop &loop);
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void dumpLoopRanges(MachineLoop &loop);
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void processHeader(LoopSplit &split);
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void processLoopExits(LoopSplit &split);
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void processLoopUses(LoopSplit &split);
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bool splitOverLoop(LiveInterval &li, MachineLoop &loop);
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void processInterval(LiveInterval &li);
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void processIntervals();
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};
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}
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#endif
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