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[AMDGPU] Small refactoring in the scheduler

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After last changes some code can be simplified.

Differential Revision: https://reviews.llvm.org/D47661

llvm-svn: 333934
This commit is contained in:
Stanislav Mekhanoshin 2018-06-04 17:57:40 +00:00
parent d0dbf4d085
commit 4301179049
1 changed files with 3 additions and 18 deletions
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21
lib/Target/AMDGPU/GCNSchedStrategy.cpp
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@ -28,18 +28,6 @@ GCNMaxOccupancySchedStrategy::GCNMaxOccupancySchedStrategy(
const MachineSchedContext *C) :
GenericScheduler(C), TargetOccupancy(0), MF(nullptr) { }
static unsigned getMaxWaves(unsigned SGPRs, unsigned VGPRs,
const MachineFunction &MF) {
const SISubtarget &ST = MF.getSubtarget<SISubtarget>();
const SIMachineFunctionInfo *MFI = MF.getInfo<SIMachineFunctionInfo>();
unsigned MinRegOccupancy = std::min(ST.getOccupancyWithNumSGPRs(SGPRs),
ST.getOccupancyWithNumVGPRs(VGPRs));
return std::min(MinRegOccupancy,
ST.getOccupancyWithLocalMemSize(MFI->getLDSSize(),
MF.getFunction()));
}
void GCNMaxOccupancySchedStrategy::initialize(ScheduleDAGMI *DAG) {
GenericScheduler::initialize(DAG);
@ -358,12 +346,9 @@ void GCNScheduleDAGMILive::schedule() {
LLVM_DEBUG(dbgs() << "Pressure in desired limits, done.\n");
return;
}
unsigned WavesAfter = getMaxWaves(PressureAfter.getSGPRNum(),
PressureAfter.getVGPRNum(), MF);
unsigned WavesBefore = getMaxWaves(PressureBefore.getSGPRNum(),
PressureBefore.getVGPRNum(), MF);
WavesAfter = std::min(WavesAfter, MFI.getMaxWavesPerEU());
WavesBefore = std::min(WavesBefore, MFI.getMaxWavesPerEU());
unsigned Occ = MFI.getOccupancy();
unsigned WavesAfter = std::min(Occ, PressureAfter.getOccupancy(ST));
unsigned WavesBefore = std::min(Occ, PressureBefore.getOccupancy(ST));
LLVM_DEBUG(dbgs() << "Occupancy before scheduling: " << WavesBefore
<< ", after " << WavesAfter << ".\n");