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https://github.com/c64scene-ar/llvm-6502.git
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573931394f
The per-operand machine model allows the target to define "unbuffered" processor resources. This change is a quick, cheap way to model stalls caused by the latency of operations that use such resources. This only applies when the processor's micro-op buffer size is non-zero (Out-of-Order). We can't precisely model in-order stalls during out-of-order execution, but this is an easy and effective heuristic. It benefits cortex-a9 scheduling when using the new machine model, which is not yet on by default. MI-Sched for armv7 was evaluated on Swift (and only not enabled because of a performance bug related to predication). However, we never evaluated Cortex-A9 performance on MI-Sched in its current form. This change adds MI-Sched functionality to reach performance goals on A9. The only remaining change is to allow MI-Sched to run as a PostRA pass. I evaluated performance using a set of options to estimate the performance impact once MI sched is default on armv7: -mcpu=cortex-a9 -disable-post-ra -misched-bench -scheditins=false For a simple saxpy loop I see a 1.7x speedup. Here are the llvm-testsuite results: (min run time over 2 runs, filtering tiny changes) Speedups: | Benchmarks/BenchmarkGame/recursive | 52.39% | | Benchmarks/VersaBench/beamformer | 20.80% | | Benchmarks/Misc/pi | 19.97% | | Benchmarks/Misc/mandel-2 | 19.95% | | SPEC/CFP2000/188.ammp | 18.72% | | Benchmarks/McCat/08-main/main | 18.58% | | Benchmarks/Misc-C++/Large/sphereflake | 18.46% | | Benchmarks/Olden/power | 17.11% | | Benchmarks/Misc-C++/mandel-text | 16.47% | | Benchmarks/Misc/oourafft | 15.94% | | Benchmarks/Misc/flops-7 | 14.99% | | Benchmarks/FreeBench/distray | 14.26% | | SPEC/CFP2006/470.lbm | 14.00% | | mediabench/mpeg2/mpeg2dec/mpeg2decode | 12.28% | | Benchmarks/SmallPT/smallpt | 10.36% | | Benchmarks/Misc-C++/Large/ray | 8.97% | | Benchmarks/Misc/fp-convert | 8.75% | | Benchmarks/Olden/perimeter | 7.10% | | Benchmarks/Bullet/bullet | 7.03% | | Benchmarks/Misc/mandel | 6.75% | | Benchmarks/Olden/voronoi | 6.26% | | Benchmarks/Misc/flops-8 | 5.77% | | Benchmarks/Misc/matmul_f64_4x4 | 5.19% | | Benchmarks/MiBench/security-rijndael | 5.15% | | Benchmarks/Misc/flops-6 | 5.10% | | Benchmarks/Olden/tsp | 4.46% | | Benchmarks/MiBench/consumer-lame | 4.28% | | Benchmarks/Misc/flops-5 | 4.27% | | Benchmarks/mafft/pairlocalalign | 4.19% | | Benchmarks/Misc/himenobmtxpa | 4.07% | | Benchmarks/Misc/lowercase | 4.06% | | SPEC/CFP2006/433.milc | 3.99% | | Benchmarks/tramp3d-v4 | 3.79% | | Benchmarks/FreeBench/pifft | 3.66% | | Benchmarks/Ptrdist/ks | 3.21% | | Benchmarks/Adobe-C++/loop_unroll | 3.12% | | SPEC/CINT2000/175.vpr | 3.12% | | Benchmarks/nbench | 2.98% | | SPEC/CFP2000/183.equake | 2.91% | | Benchmarks/Misc/perlin | 2.85% | | Benchmarks/Misc/flops-1 | 2.82% | | Benchmarks/Misc-C++-EH/spirit | 2.80% | | Benchmarks/Misc/flops-2 | 2.77% | | Benchmarks/NPB-serial/is | 2.42% | | Benchmarks/ASC_Sequoia/CrystalMk | 2.33% | | Benchmarks/BenchmarkGame/n-body | 2.28% | | Benchmarks/SciMark2-C/scimark2 | 2.27% | | Benchmarks/Olden/bh | 2.03% | | skidmarks10/skidmarks | 1.81% | | Benchmarks/Misc/flops | 1.72% | Slowdowns: | Benchmarks/llubenchmark/llu | -14.14% | | Benchmarks/Polybench/stencils/seidel-2d | -5.67% | | Benchmarks/Adobe-C++/functionobjects | -5.25% | | Benchmarks/Misc-C++/oopack_v1p8 | -5.00% | | Benchmarks/Shootout/hash | -2.35% | | Benchmarks/Prolangs-C++/ocean | -2.01% | | Benchmarks/Polybench/medley/floyd-warshall | -1.98% | | Polybench/linear-algebra/kernels/3mm | -1.95% | | Benchmarks/McCat/09-vor/vor | -1.68% | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@196516 91177308-0d34-0410-b5e6-96231b3b80d8 |
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| .. | ||
| PBQP | ||
| Analysis.h | ||
| AsmPrinter.h | ||
| CalcSpillWeights.h | ||
| CallingConvLower.h | ||
| CommandFlags.h | ||
| DAGCombine.h | ||
| DFAPacketizer.h | ||
| EdgeBundles.h | ||
| FastISel.h | ||
| FunctionLoweringInfo.h | ||
| GCMetadata.h | ||
| GCMetadataPrinter.h | ||
| GCs.h | ||
| GCStrategy.h | ||
| IntrinsicLowering.h | ||
| ISDOpcodes.h | ||
| JITCodeEmitter.h | ||
| LatencyPriorityQueue.h | ||
| LexicalScopes.h | ||
| LinkAllAsmWriterComponents.h | ||
| LinkAllCodegenComponents.h | ||
| LiveInterval.h | ||
| LiveIntervalAnalysis.h | ||
| LiveIntervalUnion.h | ||
| LiveRangeEdit.h | ||
| LiveRegMatrix.h | ||
| LiveRegUnits.h | ||
| LiveStackAnalysis.h | ||
| LiveVariables.h | ||
| MachineBasicBlock.h | ||
| MachineBlockFrequencyInfo.h | ||
| MachineBranchProbabilityInfo.h | ||
| MachineCodeEmitter.h | ||
| MachineCodeInfo.h | ||
| MachineConstantPool.h | ||
| MachineDominators.h | ||
| MachineFrameInfo.h | ||
| MachineFunction.h | ||
| MachineFunctionAnalysis.h | ||
| MachineFunctionPass.h | ||
| MachineInstr.h | ||
| MachineInstrBuilder.h | ||
| MachineInstrBundle.h | ||
| MachineJumpTableInfo.h | ||
| MachineLoopInfo.h | ||
| MachineMemOperand.h | ||
| MachineModuleInfo.h | ||
| MachineModuleInfoImpls.h | ||
| MachineOperand.h | ||
| MachinePassRegistry.h | ||
| MachinePostDominators.h | ||
| MachineRegisterInfo.h | ||
| MachineRelocation.h | ||
| MachineScheduler.h | ||
| MachineSSAUpdater.h | ||
| MachineTraceMetrics.h | ||
| MachORelocation.h | ||
| Passes.h | ||
| PseudoSourceValue.h | ||
| RegAllocPBQP.h | ||
| RegAllocRegistry.h | ||
| RegisterClassInfo.h | ||
| RegisterPressure.h | ||
| RegisterScavenging.h | ||
| ResourcePriorityQueue.h | ||
| RuntimeLibcalls.h | ||
| ScheduleDAG.h | ||
| ScheduleDAGInstrs.h | ||
| ScheduleDFS.h | ||
| ScheduleHazardRecognizer.h | ||
| SchedulerRegistry.h | ||
| ScoreboardHazardRecognizer.h | ||
| SelectionDAG.h | ||
| SelectionDAGISel.h | ||
| SelectionDAGNodes.h | ||
| SlotIndexes.h | ||
| StackMaps.h | ||
| StackProtector.h | ||
| TargetLoweringObjectFileImpl.h | ||
| TargetSchedule.h | ||
| ValueTypes.h | ||
| ValueTypes.td | ||
| VirtRegMap.h | ||