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Diffstat (limited to 'llvm/lib/Target/AMDGPU/GCNSchedStrategy.h')
-rw-r--r-- | llvm/lib/Target/AMDGPU/GCNSchedStrategy.h | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/llvm/lib/Target/AMDGPU/GCNSchedStrategy.h b/llvm/lib/Target/AMDGPU/GCNSchedStrategy.h new file mode 100644 index 00000000000..4cfc0cea81f --- /dev/null +++ b/llvm/lib/Target/AMDGPU/GCNSchedStrategy.h @@ -0,0 +1,54 @@ +//===-- GCNSchedStrategy.h - GCN Scheduler Strategy -*- C++ -*-------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +/// \file +// +//===----------------------------------------------------------------------===// + +#ifndef LLVM_LIB_TARGET_AMDGPU_GCNSCHEDSTRATEGY_H +#define LLVM_LIB_TARGET_AMDGPU_GCNSCHEDSTRATEGY_H + +#include "llvm/CodeGen/MachineScheduler.h" + +namespace llvm { + +class SIRegisterInfo; + +/// This is a minimal scheduler strategy. The main difference between this +/// and the GenericScheduler is that GCNSchedStrategy uses different +/// heuristics to determine excess/critical pressure sets. Its goal is to +/// maximize kernel occupancy (i.e. maximum number of waves per simd). +class GCNMaxOccupancySchedStrategy : public GenericScheduler { + + SUnit *pickNodeBidirectional(bool &IsTopNode); + + void pickNodeFromQueue(SchedBoundary &Zone, const CandPolicy &ZonePolicy, + const RegPressureTracker &RPTracker, + SchedCandidate &Cand); + + void initCandidate(SchedCandidate &Cand, SUnit *SU, + bool AtTop, const RegPressureTracker &RPTracker, + const SIRegisterInfo *SRI, + int SGPRPressure, int VGPRPressure, + int SGPRExcessLimit, int VGPRExcessLimit, + int SGPRCriticalLimit, int VGPRCriticalLimit); + + void tryCandidate(SchedCandidate &Cand, SchedCandidate &TryCand, + SchedBoundary *Zone, const SIRegisterInfo *SRI, + unsigned SGPRPressure, unsigned VGPRPressure); + +public: + GCNMaxOccupancySchedStrategy(const MachineSchedContext *C); + + SUnit *pickNode(bool &IsTopNode) override; +}; + +} // End namespace llvm + +#endif // GCNSCHEDSTRATEGY_H |