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//===- 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
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