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Diffstat (limited to 'lib/Target/AMDGPU/AMDGPUPerfHintAnalysis.h')
-rw-r--r-- | lib/Target/AMDGPU/AMDGPUPerfHintAnalysis.h | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/lib/Target/AMDGPU/AMDGPUPerfHintAnalysis.h b/lib/Target/AMDGPU/AMDGPUPerfHintAnalysis.h new file mode 100644 index 000000000000..be7f37cb6815 --- /dev/null +++ b/lib/Target/AMDGPU/AMDGPUPerfHintAnalysis.h @@ -0,0 +1,55 @@ +//===- AMDGPUPerfHintAnalysis.h - analysis of functions memory traffic ----===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +/// \file +/// \brief Analyzes if a function potentially memory bound and if a kernel +/// kernel may benefit from limiting number of waves to reduce cache thrashing. +/// +//===----------------------------------------------------------------------===// + +#ifndef LLVM_LIB_TARGET_AMDGPU_MDGPUPERFHINTANALYSIS_H +#define LLVM_LIB_TARGET_AMDGPU_MDGPUPERFHINTANALYSIS_H +#include "llvm/IR/ValueMap.h" +#include "llvm/Pass.h" + +namespace llvm { + +struct AMDGPUPerfHintAnalysis : public FunctionPass { + static char ID; + +public: + AMDGPUPerfHintAnalysis() : FunctionPass(ID) {} + + bool runOnFunction(Function &F) override; + + void getAnalysisUsage(AnalysisUsage &AU) const override { + AU.setPreservesAll(); + } + + bool isMemoryBound(const Function *F) const; + + bool needsWaveLimiter(const Function *F) const; + + struct FuncInfo { + unsigned MemInstCount; + unsigned InstCount; + unsigned IAMInstCount; // Indirect access memory instruction count + unsigned LSMInstCount; // Large stride memory instruction count + FuncInfo() : MemInstCount(0), InstCount(0), IAMInstCount(0), + LSMInstCount(0) {} + }; + + typedef ValueMap<const Function*, FuncInfo> FuncInfoMap; + +private: + + FuncInfoMap FIM; +}; +} // namespace llvm +#endif // LLVM_LIB_TARGET_AMDGPU_MDGPUPERFHINTANALYSIS_H |