SmallVector<unsigned, 16> ResourceFactors;
unsigned MicroOpFactor; // Multiply to normalize microops to resource units.
unsigned ResourceLCM; // Resource units per cycle. Latency normalization factor.
+
+ unsigned computeInstrLatency(const MCSchedClassDesc &SCDesc) const;
+
public:
- TargetSchedModel(): STI(0), TII(0) {}
+ TargetSchedModel(): SchedModel(MCSchedModel::GetDefaultSchedModel()), STI(nullptr), TII(nullptr) {}
/// \brief Initialize the machine model for instruction scheduling.
///
const InstrItineraryData *getInstrItineraries() const {
if (hasInstrItineraries())
return &InstrItins;
- return 0;
+ return nullptr;
}
/// \brief Identify the processor corresponding to the current subtarget.
/// \brief Maximum number of micro-ops that may be scheduled per cycle.
unsigned getIssueWidth() const { return SchedModel.IssueWidth; }
- /// \brief Number of cycles the OOO processor is expected to hide.
- unsigned getILPWindow() const { return SchedModel.ILPWindow; }
-
/// \brief Return the number of issue slots required for this MI.
unsigned getNumMicroOps(const MachineInstr *MI,
- const MCSchedClassDesc *SC = 0) const;
+ const MCSchedClassDesc *SC = nullptr) const;
/// \brief Get the number of kinds of resources for this target.
unsigned getNumProcResourceKinds() const {
return SchedModel.getProcResource(PIdx);
}
+#ifndef NDEBUG
+ const char *getResourceName(unsigned PIdx) const {
+ if (!PIdx)
+ return "MOps";
+ return SchedModel.getProcResource(PIdx)->Name;
+ }
+#endif
+
typedef const MCWriteProcResEntry *ProcResIter;
// \brief Get an iterator into the processor resources consumed by this
return ResourceLCM;
}
+ /// \brief Number of micro-ops that may be buffered for OOO execution.
+ unsigned getMicroOpBufferSize() const { return SchedModel.MicroOpBufferSize; }
+
+ /// \brief Number of resource units that may be buffered for OOO execution.
+ /// \return The buffer size in resource units or -1 for unlimited.
+ int getResourceBufferSize(unsigned PIdx) const {
+ return SchedModel.getProcResource(PIdx)->BufferSize;
+ }
+
/// \brief Compute operand latency based on the available machine model.
///
- /// Computes and return the latency of the given data dependent def and use
+ /// Compute and return the latency of the given data dependent def and use
/// when the operand indices are already known. UseMI may be NULL for an
/// unknown user.
- ///
- /// FindMin may be set to get the minimum vs. expected latency. Minimum
- /// latency is used for scheduling groups, while expected latency is for
- /// instruction cost and critical path.
unsigned computeOperandLatency(const MachineInstr *DefMI, unsigned DefOperIdx,
- const MachineInstr *UseMI, unsigned UseOperIdx,
- bool FindMin) const;
+ const MachineInstr *UseMI, unsigned UseOperIdx)
+ const;
/// \brief Compute the instruction latency based on the available machine
/// model.
///
/// Compute and return the expected latency of this instruction independent of
- /// a particular use. computeOperandLatency is the prefered API, but this is
+ /// a particular use. computeOperandLatency is the preferred API, but this is
/// occasionally useful to help estimate instruction cost.
- unsigned computeInstrLatency(const MachineInstr *MI) const;
+ ///
+ /// If UseDefaultDefLatency is false and no new machine sched model is
+ /// present this method falls back to TII->getInstrLatency with an empty
+ /// instruction itinerary (this is so we preserve the previous behavior of the
+ /// if converter after moving it to TargetSchedModel).
+ unsigned computeInstrLatency(const MachineInstr *MI,
+ bool UseDefaultDefLatency = true) const;
+ unsigned computeInstrLatency(unsigned Opcode) const;
/// \brief Output dependency latency of a pair of defs of the same register.
///
/// This is typically one cycle.
unsigned computeOutputLatency(const MachineInstr *DefMI, unsigned DefIdx,
const MachineInstr *DepMI) const;
-
-private:
- /// getDefLatency is a helper for computeOperandLatency. Return the
- /// instruction's latency if operand lookup is not required.
- /// Otherwise return -1.
- int getDefLatency(const MachineInstr *DefMI, bool FindMin) const;
};
} // namespace llvm