/// SDNodes such as Constants, Registers, and a few others that are not
/// interesting to schedulers are not allocated SUnits.
///
- /// SDNodes with MVT::Flag operands are grouped along with the flagged
+ /// SDNodes with MVT::Glue operands are grouped along with the flagged
/// nodes into a single SUnit so that they are scheduled together.
///
/// SDNode-based scheduling graphs do not use SDep::Anti or SDep::Output
class ScheduleDAGSDNodes : public ScheduleDAG {
public:
SelectionDAG *DAG; // DAG of the current basic block
+ const InstrItineraryData *InstrItins;
explicit ScheduleDAGSDNodes(MachineFunction &mf);
if (isa<ConstantPoolSDNode>(Node)) return true;
if (isa<JumpTableSDNode>(Node)) return true;
if (isa<ExternalSymbolSDNode>(Node)) return true;
- if (Node->getOpcode() == ISD::EntryToken) return true;
+ if (isa<BlockAddressSDNode>(Node)) return true;
+ if (Node->getOpcode() == ISD::EntryToken ||
+ isa<MDNodeSDNode>(Node)) return true;
return false;
}
/// NewSUnit - Creates a new SUnit and return a ptr to it.
///
- SUnit *NewSUnit(SDNode *N) {
-#ifndef NDEBUG
- const SUnit *Addr = 0;
- if (!SUnits.empty())
- Addr = &SUnits[0];
-#endif
- SUnits.push_back(SUnit(N, (unsigned)SUnits.size()));
- assert((Addr == 0 || Addr == &SUnits[0]) &&
- "SUnits std::vector reallocated on the fly!");
- SUnits.back().OrigNode = &SUnits.back();
- return &SUnits.back();
- }
+ SUnit *NewSUnit(SDNode *N);
/// Clone - Creates a clone of the specified SUnit. It does not copy the
/// predecessors / successors info nor the temporary scheduling states.
/// are input. This SUnit graph is similar to the SelectionDAG, but
/// excludes nodes that aren't interesting to scheduling, and represents
/// flagged together nodes with a single SUnit.
- virtual void BuildSchedGraph();
+ virtual void BuildSchedGraph(AliasAnalysis *AA);
/// ComputeLatency - Compute node latency.
///
virtual void ComputeLatency(SUnit *SU);
- /// CountResults - The results of target nodes have register or immediate
- /// operands first, then an optional chain, and optional flag operands
- /// (which do not go into the machine instrs.)
- static unsigned CountResults(SDNode *Node);
+ /// ComputeOperandLatency - Override dependence edge latency using
+ /// operand use/def information
+ ///
+ virtual void ComputeOperandLatency(SUnit *Def, SUnit *Use,
+ SDep& dep) const { }
- /// CountOperands - The inputs to target nodes have any actual inputs first,
- /// followed by an optional chain operand, then flag operands. Compute
- /// the number of actual operands that will go into the resulting
- /// MachineInstr.
- static unsigned CountOperands(SDNode *Node);
+ virtual void ComputeOperandLatency(SDNode *Def, SDNode *Use,
+ unsigned OpIdx, SDep& dep) const;
- /// EmitNode - Generate machine code for an node and needed dependencies.
- /// VRBaseMap contains, for each already emitted node, the first virtual
- /// register number for the results of the node.
- ///
- void EmitNode(SDNode *Node, bool IsClone, bool HasClone,
- DenseMap<SDValue, unsigned> &VRBaseMap,
- DenseMap<MachineBasicBlock*, MachineBasicBlock*> *EM);
-
- virtual MachineBasicBlock *
- EmitSchedule(DenseMap<MachineBasicBlock*, MachineBasicBlock*> *EM);
+ virtual MachineBasicBlock *EmitSchedule();
/// Schedule - Order nodes according to selected style, filling
/// in the Sequence member.
virtual void getCustomGraphFeatures(GraphWriter<ScheduleDAG*> &GW) const;
private:
- /// EmitSubregNode - Generate machine code for subreg nodes.
- ///
- void EmitSubregNode(SDNode *Node,
- DenseMap<SDValue, unsigned> &VRBaseMap);
-
- /// EmitCopyToRegClassNode - Generate machine code for COPY_TO_REGCLASS
- /// nodes.
+ /// ClusterNeighboringLoads - Cluster loads from "near" addresses into
+ /// combined SUnits.
+ void ClusterNeighboringLoads(SDNode *Node);
+ /// ClusterNodes - Cluster certain nodes which should be scheduled together.
///
- void EmitCopyToRegClassNode(SDNode *Node,
- DenseMap<SDValue, unsigned> &VRBaseMap);
-
- /// getVR - Return the virtual register corresponding to the specified result
- /// of the specified node.
- unsigned getVR(SDValue Op, DenseMap<SDValue, unsigned> &VRBaseMap);
-
- /// getDstOfCopyToRegUse - If the only use of the specified result number of
- /// node is a CopyToReg, return its destination register. Return 0 otherwise.
- unsigned getDstOfOnlyCopyToRegUse(SDNode *Node, unsigned ResNo) const;
-
- void AddOperand(MachineInstr *MI, SDValue Op, unsigned IIOpNum,
- const TargetInstrDesc *II,
- DenseMap<SDValue, unsigned> &VRBaseMap);
-
- /// AddRegisterOperand - Add the specified register as an operand to the
- /// specified machine instr. Insert register copies if the register is
- /// not in the required register class.
- void AddRegisterOperand(MachineInstr *MI, SDValue Op,
- unsigned IIOpNum, const TargetInstrDesc *II,
- DenseMap<SDValue, unsigned> &VRBaseMap);
-
- /// EmitCopyFromReg - Generate machine code for an CopyFromReg node or an
- /// implicit physical register output.
- void EmitCopyFromReg(SDNode *Node, unsigned ResNo, bool IsClone,
- bool IsCloned, unsigned SrcReg,
- DenseMap<SDValue, unsigned> &VRBaseMap);
-
- void CreateVirtualRegisters(SDNode *Node, MachineInstr *MI,
- const TargetInstrDesc &II, bool IsClone,
- bool IsCloned,
- DenseMap<SDValue, unsigned> &VRBaseMap);
+ void ClusterNodes();
/// BuildSchedUnits, AddSchedEdges - Helper functions for BuildSchedGraph.
void BuildSchedUnits();