diff --git a/llvm/include/llvm/Target/TargetInstrInfo.h b/llvm/include/llvm/Target/TargetInstrInfo.h index 855400318aab..c730f979e73e 100644 --- a/llvm/include/llvm/Target/TargetInstrInfo.h +++ b/llvm/include/llvm/Target/TargetInstrInfo.h @@ -20,12 +20,14 @@ namespace llvm { class CalleeSavedInfo; +class InstrItineraryData; class LiveVariables; class MCAsmInfo; class MachineMemOperand; class MDNode; class MCInst; class SDNode; +class ScheduleHazardRecognizer; class SelectionDAG; class TargetRegisterClass; class TargetRegisterInfo; @@ -575,6 +577,12 @@ public: /// length. virtual unsigned getInlineAsmLength(const char *Str, const MCAsmInfo &MAI) const; + + /// CreateTargetHazardRecognizer - Allocate and return a hazard recognizer + /// to use for this target when scheduling the machine instructions after + /// register allocation. + virtual ScheduleHazardRecognizer* + CreateTargetPostRAHazardRecognizer(const InstrItineraryData&) const = 0; }; /// TargetInstrInfoImpl - This is the default implementation of @@ -602,6 +610,9 @@ public: virtual bool produceSameValue(const MachineInstr *MI0, const MachineInstr *MI1) const; virtual unsigned GetFunctionSizeInBytes(const MachineFunction &MF) const; + + virtual ScheduleHazardRecognizer * + CreateTargetPostRAHazardRecognizer(const InstrItineraryData&) const; }; } // End llvm namespace diff --git a/llvm/lib/CodeGen/PostRASchedulerList.cpp b/llvm/lib/CodeGen/PostRASchedulerList.cpp index 9714ea653b59..d41463f3894b 100644 --- a/llvm/lib/CodeGen/PostRASchedulerList.cpp +++ b/llvm/lib/CodeGen/PostRASchedulerList.cpp @@ -67,8 +67,8 @@ EnableAntiDepBreaking("break-anti-dependencies", cl::init("none"), cl::Hidden); static cl::opt EnablePostRAHazardAvoidance("avoid-hazards", - cl::desc("Enable exact hazard avoidance"), - cl::init(true), cl::Hidden); + cl::desc("Enable exact hazard avoidance"), + cl::init(true), cl::Hidden); // If DebugDiv > 0 then only schedule MBB with (ID % DebugDiv) == DebugMod static cl::opt @@ -237,10 +237,10 @@ bool PostRAScheduler::runOnMachineFunction(MachineFunction &Fn) { const MachineLoopInfo &MLI = getAnalysis(); const MachineDominatorTree &MDT = getAnalysis(); - const InstrItineraryData &InstrItins = Fn.getTarget().getInstrItineraryData(); - ScheduleHazardRecognizer *HR = EnablePostRAHazardAvoidance ? - (ScheduleHazardRecognizer *)new ExactHazardRecognizer(InstrItins) : - (ScheduleHazardRecognizer *)new SimpleHazardRecognizer(); + const TargetMachine &TM = Fn.getTarget(); + const InstrItineraryData &InstrItins = TM.getInstrItineraryData(); + ScheduleHazardRecognizer *HR = + TM.getInstrInfo()->CreateTargetPostRAHazardRecognizer(InstrItins); AntiDepBreaker *ADB = ((AntiDepMode == TargetSubtarget::ANTIDEP_ALL) ? (AntiDepBreaker *)new AggressiveAntiDepBreaker(Fn, CriticalPathRCs) : @@ -719,6 +719,16 @@ void SchedulePostRATDList::ListScheduleTopDown() { #endif } +// Default implementation of CreateTargetPostRAHazardRecognizer. This should +// be in TargetInstrInfoImpl.cpp except it reference local command line +// option EnablePostRAHazardAvoidance +ScheduleHazardRecognizer *TargetInstrInfoImpl:: +CreateTargetPostRAHazardRecognizer(const InstrItineraryData &II) const { + if (EnablePostRAHazardAvoidance) + return (ScheduleHazardRecognizer *)new ExactHazardRecognizer(II); + return (ScheduleHazardRecognizer *)new SimpleHazardRecognizer(); +} + //===----------------------------------------------------------------------===// // Public Constructor Functions //===----------------------------------------------------------------------===//