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57 lines
1.7 KiB
57 lines
1.7 KiB
4 months ago
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//===- AMDGPUPerfHintAnalysis.h ---- analysis of memory traffic -*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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/// \file
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/// \brief Analyzes if a function potentially memory bound and if a kernel
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/// kernel may benefit from limiting number of waves to reduce cache thrashing.
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///
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_TARGET_AMDGPU_MDGPUPERFHINTANALYSIS_H
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#define LLVM_LIB_TARGET_AMDGPU_MDGPUPERFHINTANALYSIS_H
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#include "llvm/Analysis/CallGraphSCCPass.h"
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#include "llvm/IR/ValueMap.h"
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#include "llvm/Pass.h"
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namespace llvm {
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struct AMDGPUPerfHintAnalysis : public CallGraphSCCPass {
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static char ID;
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public:
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AMDGPUPerfHintAnalysis() : CallGraphSCCPass(ID) {}
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bool runOnSCC(CallGraphSCC &SCC) override;
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void getAnalysisUsage(AnalysisUsage &AU) const override {
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AU.setPreservesAll();
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}
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bool isMemoryBound(const Function *F) const;
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bool needsWaveLimiter(const Function *F) const;
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struct FuncInfo {
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unsigned MemInstCount;
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unsigned InstCount;
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unsigned IAMInstCount; // Indirect access memory instruction count
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unsigned LSMInstCount; // Large stride memory instruction count
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FuncInfo() : MemInstCount(0), InstCount(0), IAMInstCount(0),
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LSMInstCount(0) {}
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};
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typedef ValueMap<const Function*, FuncInfo> FuncInfoMap;
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private:
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FuncInfoMap FIM;
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};
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} // namespace llvm
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#endif // LLVM_LIB_TARGET_AMDGPU_MDGPUPERFHINTANALYSIS_H
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