| //===- AMDGPUPerfHintAnalysis.h ---- analysis of memory traffic -*- C++ -*-===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| /// \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/Analysis/CallGraphSCCPass.h" |
| #include "llvm/IR/ValueMap.h" |
| |
| namespace llvm { |
| |
| struct AMDGPUPerfHintAnalysis : public CallGraphSCCPass { |
| static char ID; |
| |
| public: |
| AMDGPUPerfHintAnalysis() : CallGraphSCCPass(ID) {} |
| |
| bool runOnSCC(CallGraphSCC &SCC) override; |
| |
| void getAnalysisUsage(AnalysisUsage &AU) const override { |
| AU.setPreservesAll(); |
| } |
| |
| bool isMemoryBound(const Function *F) const; |
| |
| bool needsWaveLimiter(const Function *F) const; |
| |
| struct FuncInfo { |
| unsigned MemInstCost; |
| unsigned InstCost; |
| unsigned IAMInstCost; // Indirect access memory instruction count |
| unsigned LSMInstCost; // Large stride memory instruction count |
| FuncInfo() : MemInstCost(0), InstCost(0), IAMInstCost(0), LSMInstCost(0) {} |
| }; |
| |
| typedef ValueMap<const Function*, FuncInfo> FuncInfoMap; |
| |
| private: |
| |
| FuncInfoMap FIM; |
| }; |
| } // namespace llvm |
| #endif // LLVM_LIB_TARGET_AMDGPU_MDGPUPERFHINTANALYSIS_H |