#define LLVM_TARGET_TARGETSUBTARGETINFO_H
#include "llvm/MC/MCSubtargetInfo.h"
-#include "llvm/Target/TargetMachine.h"
+#include "llvm/Support/CodeGen.h"
namespace llvm {
+class MachineFunction;
+class MachineInstr;
class SDep;
class SUnit;
class TargetRegisterClass;
+class TargetSchedModel;
+struct MachineSchedPolicy;
template <typename T> class SmallVectorImpl;
//===----------------------------------------------------------------------===//
/// be exposed through a TargetSubtargetInfo-derived class.
///
class TargetSubtargetInfo : public MCSubtargetInfo {
- TargetSubtargetInfo(const TargetSubtargetInfo&); // DO NOT IMPLEMENT
- void operator=(const TargetSubtargetInfo&); // DO NOT IMPLEMENT
+ TargetSubtargetInfo(const TargetSubtargetInfo&) LLVM_DELETED_FUNCTION;
+ void operator=(const TargetSubtargetInfo&) LLVM_DELETED_FUNCTION;
protected: // Can only create subclasses...
TargetSubtargetInfo();
public:
virtual ~TargetSubtargetInfo();
- /// getSpecialAddressLatency - For targets where it is beneficial to
- /// backschedule instructions that compute addresses, return a value
- /// indicating the number of scheduling cycles of backscheduling that
- /// should be attempted.
- virtual unsigned getSpecialAddressLatency() const { return 0; }
+ /// Resolve a SchedClass at runtime, where SchedClass identifies an
+ /// MCSchedClassDesc with the isVariant property. This may return the ID of
+ /// another variant SchedClass, but repeated invocation must quickly terminate
+ /// in a nonvariant SchedClass.
+ virtual unsigned resolveSchedClass(unsigned SchedClass, const MachineInstr *MI,
+ const TargetSchedModel* SchedModel) const {
+ return 0;
+ }
+
+ /// \brief Temporary API to test migration to MI scheduler.
+ bool useMachineScheduler() const;
+
+ /// \brief True if the subtarget should run MachineScheduler after aggressive
+ /// coalescing.
+ ///
+ /// This currently replaces the SelectionDAG scheduler with the "source" order
+ /// scheduler. It does not yet disable the postRA scheduler.
+ virtual bool enableMachineScheduler() const;
+
+ /// \brief True if the subtarget should run PostMachineScheduler.
+ ///
+ /// This only takes effect if the target has configured the
+ /// PostMachineScheduler pass to run, or if the global cl::opt flag,
+ /// MISchedPostRA, is set.
+ virtual bool enablePostMachineScheduler() const;
+
+ /// \brief True if the subtarget should run the atomic expansion pass.
+ virtual bool enableAtomicExpandLoadLinked() const;
+
+ /// \brief Override generic scheduling policy within a region.
+ ///
+ /// This is a convenient way for targets that don't provide any custom
+ /// scheduling heuristics (no custom MachineSchedStrategy) to make
+ /// changes to the generic scheduling policy.
+ virtual void overrideSchedPolicy(MachineSchedPolicy &Policy,
+ MachineInstr *begin,
+ MachineInstr *end,
+ unsigned NumRegionInstrs) const {}
+
+ // \brief Perform target specific adjustments to the latency of a schedule
+ // dependency.
+ virtual void adjustSchedDependency(SUnit *def, SUnit *use,
+ SDep& dep) const { }
// enablePostRAScheduler - If the target can benefit from post-regalloc
// scheduling and the specified optimization level meets the requirement
// return true to enable post-register-allocation scheduling. In
// CriticalPathRCs return any register classes that should only be broken
- // if on the critical path.
+ // if on the critical path.
virtual bool enablePostRAScheduler(CodeGenOpt::Level OptLevel,
AntiDepBreakMode& Mode,
RegClassVector& CriticalPathRCs) const;
- // adjustSchedDependency - Perform target specific adjustments to
- // the latency of a schedule dependency.
- virtual void adjustSchedDependency(SUnit *def, SUnit *use,
- SDep& dep) const { }
+
+ /// \brief Enable use of alias analysis during code generation (during MI
+ /// scheduling, DAGCombine, etc.).
+ virtual bool useAA() const;
+
+ /// \brief Enable the use of the early if conversion pass.
+ virtual bool enableEarlyIfConversion() const { return false; }
+
+ /// \brief Reset the features for the subtarget.
+ virtual void resetSubtargetFeatures(const MachineFunction *MF) { }
};
} // End llvm namespace