#include "llvm/CodeGen/DFAPacketizer.h"
Inheritance diagram for llvm::DefaultVLIWScheduler:
Public Member Functions | |
| DefaultVLIWScheduler (MachineFunction &MF, MachineLoopInfo &MLI, AAResults *AA) | |
| void | schedule () override |
| Orders nodes according to selected style. | |
| void | addMutation (std::unique_ptr< ScheduleDAGMutation > Mutation) |
| DefaultVLIWScheduler takes ownership of the Mutation object. | |
 Public Member Functions inherited from llvm::ScheduleDAGInstrs | |
| void | setDumpDirection (DumpDirection D) |
| ScheduleDAGInstrs (MachineFunction &mf, const MachineLoopInfo *mli, bool RemoveKillFlags=false) | |
| ~ScheduleDAGInstrs () override=default | |
| const TargetSchedModel * | getSchedModel () const |
| Gets the machine model for instruction scheduling. | |
| const MCSchedClassDesc * | getSchedClass (SUnit *SU) const |
| Resolves and cache a resolved scheduling class for an SUnit. | |
| bool | IsReachable (SUnit *SU, SUnit *TargetSU) |
| IsReachable - Checks if SU is reachable from TargetSU. | |
| MachineBasicBlock::iterator | begin () const |
| Returns an iterator to the top of the current scheduling region. | |
| MachineBasicBlock::iterator | end () const |
| Returns an iterator to the bottom of the current scheduling region. | |
| SUnit * | newSUnit (MachineInstr *MI) |
| Creates a new SUnit and return a ptr to it. | |
| SUnit * | getSUnit (MachineInstr *MI) const |
| Returns an existing SUnit for this MI, or nullptr. | |
| virtual bool | doMBBSchedRegionsTopDown () const |
| If this method returns true, handling of the scheduling regions themselves (in case of a scheduling boundary in MBB) will be done beginning with the topmost region of MBB. | |
| virtual void | startBlock (MachineBasicBlock *BB) |
| Prepares to perform scheduling in the given block. | |
| virtual void | finishBlock () |
| Cleans up after scheduling in the given block. | |
| virtual void | enterRegion (MachineBasicBlock *bb, MachineBasicBlock::iterator begin, MachineBasicBlock::iterator end, unsigned regioninstrs) |
| Initialize the DAG and common scheduler state for a new scheduling region. | |
| virtual void | exitRegion () |
| Called when the scheduler has finished scheduling the current region. | |
| void | buildSchedGraph (AAResults *AA, RegPressureTracker *RPTracker=nullptr, PressureDiffs *PDiffs=nullptr, LiveIntervals *LIS=nullptr, bool TrackLaneMasks=false) |
| Builds SUnits for the current region. | |
| void | addSchedBarrierDeps () |
| Adds dependencies from instructions in the current list of instructions being scheduled to scheduling barrier. | |
| virtual void | schedule ()=0 |
| Orders nodes according to selected style. | |
| virtual void | finalizeSchedule () |
| Allow targets to perform final scheduling actions at the level of the whole MachineFunction. | |
| void | dumpNode (const SUnit &SU) const override |
| void | dump () const override |
| std::string | getGraphNodeLabel (const SUnit *SU) const override |
| Returns a label for a DAG node that points to an instruction. | |
| std::string | getDAGName () const override |
| Returns a label for the region of code covered by the DAG. | |
| void | fixupKills (MachineBasicBlock &MBB) |
| Fixes register kill flags that scheduling has made invalid. | |
| bool | canAddEdge (SUnit *SuccSU, SUnit *PredSU) |
| True if an edge can be added from PredSU to SuccSU without creating a cycle. | |
| bool | addEdge (SUnit *SuccSU, const SDep &PredDep) |
| Add a DAG edge to the given SU with the given predecessor dependence data. | |
| Public Member Functions inherited from llvm::ScheduleDAG | |
| ScheduleDAG (const ScheduleDAG &)=delete | |
| ScheduleDAG & | operator= (const ScheduleDAG &)=delete |
| ScheduleDAG (MachineFunction &mf) | |
| virtual | ~ScheduleDAG () |
| void | clearDAG () |
| Clears the DAG state (between regions). | |
| const MCInstrDesc * | getInstrDesc (const SUnit *SU) const |
| Returns the MCInstrDesc of this SUnit. | |
| virtual void | viewGraph (const Twine &Name, const Twine &Title) |
| Pops up a GraphViz/gv window with the ScheduleDAG rendered using 'dot'. | |
| virtual void | viewGraph () |
| Out-of-line implementation with no arguments is handy for gdb. | |
| virtual void | dumpNode (const SUnit &SU) const =0 |
| virtual void | dump () const =0 |
| void | dumpNodeName (const SUnit &SU) const |
| virtual std::string | getGraphNodeLabel (const SUnit *SU) const =0 |
| Returns a label for an SUnit node in a visualization of the ScheduleDAG. | |
| virtual std::string | getDAGName () const =0 |
| Returns a label for the region of code covered by the DAG. | |
| virtual void | addCustomGraphFeatures (GraphWriter< ScheduleDAG * > &) const |
| Adds custom features for a visualization of the ScheduleDAG. | |
| unsigned | VerifyScheduledDAG (bool isBottomUp) |
| Verifies that all SUnits were scheduled and that their state is consistent. | |
Protected Member Functions | |
| void | postProcessDAG () |
| Apply each ScheduleDAGMutation step in order. | |
| Protected Member Functions inherited from llvm::ScheduleDAGInstrs | |
| void | reduceHugeMemNodeMaps (Value2SUsMap &stores, Value2SUsMap &loads, unsigned N) |
| Reduces maps in FIFO order, by N SUs. | |
| void | addChainDependency (SUnit *SUa, SUnit *SUb, unsigned Latency=0) |
| Adds a chain edge between SUa and SUb, but only if both AAResults and Target fail to deny the dependency. | |
| void | addChainDependencies (SUnit *SU, SUList &SUs, unsigned Latency) |
| Adds dependencies as needed from all SUs in list to SU. | |
| void | addChainDependencies (SUnit *SU, Value2SUsMap &Val2SUsMap) |
| Adds dependencies as needed from all SUs in map, to SU. | |
| void | addChainDependencies (SUnit *SU, Value2SUsMap &Val2SUsMap, ValueType V) |
| Adds dependencies as needed to SU, from all SUs mapped to V. | |
| void | addBarrierChain (Value2SUsMap &map) |
| Adds barrier chain edges from all SUs in map, and then clear the map. | |
| void | insertBarrierChain (Value2SUsMap &map) |
| Inserts a barrier chain in a huge region, far below current SU. | |
| void | initSUnits () |
| Creates an SUnit for each real instruction, numbered in top-down topological order. | |
| void | addPhysRegDataDeps (SUnit *SU, unsigned OperIdx) |
| MO is an operand of SU's instruction that defines a physical register. | |
| void | addPhysRegDeps (SUnit *SU, unsigned OperIdx) |
| Adds register dependencies (data, anti, and output) from this SUnit to following instructions in the same scheduling region that depend the physical register referenced at OperIdx. | |
| void | addVRegDefDeps (SUnit *SU, unsigned OperIdx) |
| Adds register output and data dependencies from this SUnit to instructions that occur later in the same scheduling region if they read from or write to the virtual register defined at OperIdx. | |
| void | addVRegUseDeps (SUnit *SU, unsigned OperIdx) |
| Adds a register data dependency if the instruction that defines the virtual register used at OperIdx is mapped to an SUnit. | |
| LaneBitmask | getLaneMaskForMO (const MachineOperand &MO) const |
| Returns a mask for which lanes get read/written by the given (register) machine operand. | |
| bool | deadDefHasNoUse (const MachineOperand &MO) |
Returns true if the def register in MO has no uses. | |
| Protected Member Functions inherited from llvm::ScheduleDAG | |
| void | dumpNodeAll (const SUnit &SU) const |
Additional Inherited Members | |
| Public Types inherited from llvm::ScheduleDAGInstrs | |
| enum | DumpDirection { TopDown , BottomUp , Bidirectional , NotSet } |
| The direction that should be used to dump the scheduled Sequence. More... | |
| using | SUList = std::list< SUnit * > |
| A list of SUnits, used in Value2SUsMap, during DAG construction. | |
| Public Attributes inherited from llvm::ScheduleDAG | |
| const LLVMTargetMachine & | TM |
| Target processor. | |
| const TargetInstrInfo * | TII |
| Target instruction information. | |
| const TargetRegisterInfo * | TRI |
| Target processor register info. | |
| MachineFunction & | MF |
| Machine function. | |
| MachineRegisterInfo & | MRI |
| Virtual/real register map. | |
| std::vector< SUnit > | SUnits |
| The scheduling units. | |
| SUnit | EntrySU |
| Special node for the region entry. | |
| SUnit | ExitSU |
| Special node for the region exit. | |
| bool | StressSched |
| Protected Types inherited from llvm::ScheduleDAGInstrs | |
| using | DbgValueVector = std::vector< std::pair< MachineInstr *, MachineInstr * > > |
| Protected Attributes inherited from llvm::ScheduleDAGInstrs | |
| const MachineLoopInfo * | MLI = nullptr |
| const MachineFrameInfo & | MFI |
| TargetSchedModel | SchedModel |
| TargetSchedModel provides an interface to the machine model. | |
| bool | RemoveKillFlags |
| True if the DAG builder should remove kill flags (in preparation for rescheduling). | |
| bool | CanHandleTerminators = false |
| The standard DAG builder does not normally include terminators as DAG nodes because it does not create the necessary dependencies to prevent reordering. | |
| bool | TrackLaneMasks = false |
| Whether lane masks should get tracked. | |
| MachineBasicBlock * | BB = nullptr |
| The block in which to insert instructions. | |
| MachineBasicBlock::iterator | RegionBegin |
| The beginning of the range to be scheduled. | |
| MachineBasicBlock::iterator | RegionEnd |
| The end of the range to be scheduled. | |
| unsigned | NumRegionInstrs = 0 |
| Instructions in this region (distance(RegionBegin, RegionEnd)). | |
| DenseMap< MachineInstr *, SUnit * > | MISUnitMap |
| After calling BuildSchedGraph, each machine instruction in the current scheduling region is mapped to an SUnit. | |
| RegUnit2SUnitsMap | Defs |
| Defs, Uses - Remember where defs and uses of each register are as we iterate upward through the instructions. | |
| RegUnit2SUnitsMap | Uses |
| VReg2SUnitMultiMap | CurrentVRegDefs |
| Tracks the last instruction(s) in this region defining each virtual register. | |
| VReg2SUnitOperIdxMultiMap | CurrentVRegUses |
| Tracks the last instructions in this region using each virtual register. | |
| AAResults * | AAForDep = nullptr |
| SUnit * | BarrierChain = nullptr |
| Remember a generic side-effecting instruction as we proceed. | |
| DumpDirection | DumpDir = NotSet |
| UndefValue * | UnknownValue |
| For an unanalyzable memory access, this Value is used in maps. | |
| ScheduleDAGTopologicalSort | Topo |
| Topo - A topological ordering for SUnits which permits fast IsReachable and similar queries. | |
| DbgValueVector | DbgValues |
| Remember instruction that precedes DBG_VALUE. | |
| MachineInstr * | FirstDbgValue = nullptr |
| LiveRegUnits | LiveRegs |
| Set of live physical registers for updating kill flags. | |
Detailed Description
Definition at line 51 of file DFAPacketizer.h.
Constructor & Destructor Documentation
◆ DefaultVLIWScheduler()
| DefaultVLIWScheduler::DefaultVLIWScheduler | ( | MachineFunction & | MF, |
| MachineLoopInfo & | MLI, | ||
| AAResults * | AA | ||
| ) |
Definition at line 99 of file DFAPacketizer.cpp.
References llvm::ScheduleDAGInstrs::CanHandleTerminators.
Member Function Documentation
◆ addMutation()
|
inline |
DefaultVLIWScheduler takes ownership of the Mutation object.
Definition at line 65 of file DFAPacketizer.h.
References Mutation.
Referenced by llvm::VLIWPacketizerList::addMutation().
◆ postProcessDAG()
|
protected |
Apply each ScheduleDAGMutation step in order.
Definition at line 107 of file DFAPacketizer.cpp.
Referenced by schedule().
◆ schedule()
|
overridevirtual |
Orders nodes according to selected style.
Typically, a scheduling algorithm will implement schedule() without overriding enterRegion() or exitRegion().
Implements llvm::ScheduleDAGInstrs.
Definition at line 112 of file DFAPacketizer.cpp.
References llvm::ScheduleDAGInstrs::buildSchedGraph(), and postProcessDAG().
Referenced by llvm::VLIWPacketizerList::PacketizeMIs().
The documentation for this class was generated from the following files:
- include/llvm/CodeGen/DFAPacketizer.h
- lib/CodeGen/DFAPacketizer.cpp
