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//===- ProfileCommon.h - Common profiling APIs. -----------------*- 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
//
//===----------------------------------------------------------------------===//
//
// This file contains data structures and functions common to both instrumented
// and sample profiling.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_PROFILEDATA_PROFILECOMMON_H
#define LLVM_PROFILEDATA_PROFILECOMMON_H
#include "llvm/ADT/ArrayRef.h"
#include "llvm/IR/ProfileSummary.h"
#include "llvm/ProfileData/InstrProf.h"
#include "llvm/Support/Error.h"
#include <algorithm>
#include <cstdint>
#include <functional>
#include <map>
#include <memory>
#include <vector>
namespace llvm {
namespace sampleprof {
class FunctionSamples;
} // end namespace sampleprof
inline const char *getHotSectionPrefix() { return ".hot"; }
inline const char *getUnlikelySectionPrefix() { return ".unlikely"; }
class ProfileSummaryBuilder {
private:
/// We keep track of the number of times a count (block count or samples)
/// appears in the profile. The map is kept sorted in the descending order of
/// counts.
std::map<uint64_t, uint32_t, std::greater<uint64_t>> CountFrequencies;
std::vector<uint32_t> DetailedSummaryCutoffs;
protected:
SummaryEntryVector DetailedSummary;
uint64_t TotalCount = 0;
uint64_t MaxCount = 0;
uint64_t MaxFunctionCount = 0;
uint32_t NumCounts = 0;
uint32_t NumFunctions = 0;
ProfileSummaryBuilder(std::vector<uint32_t> Cutoffs)
: DetailedSummaryCutoffs(std::move(Cutoffs)) {}
~ProfileSummaryBuilder() = default;
inline void addCount(uint64_t Count);
void computeDetailedSummary();
public:
/// A vector of useful cutoff values for detailed summary.
static const ArrayRef<uint32_t> DefaultCutoffs;
/// Find the summary entry for a desired percentile of counts.
static const ProfileSummaryEntry &
getEntryForPercentile(SummaryEntryVector &DS, uint64_t Percentile);
};
class InstrProfSummaryBuilder final : public ProfileSummaryBuilder {
uint64_t MaxInternalBlockCount = 0;
inline void addEntryCount(uint64_t Count);
inline void addInternalCount(uint64_t Count);
public:
InstrProfSummaryBuilder(std::vector<uint32_t> Cutoffs)
: ProfileSummaryBuilder(std::move(Cutoffs)) {}
void addRecord(const InstrProfRecord &);
std::unique_ptr<ProfileSummary> getSummary();
};
class SampleProfileSummaryBuilder final : public ProfileSummaryBuilder {
public:
SampleProfileSummaryBuilder(std::vector<uint32_t> Cutoffs)
: ProfileSummaryBuilder(std::move(Cutoffs)) {}
void addRecord(const sampleprof::FunctionSamples &FS,
bool isCallsiteSample = false);
std::unique_ptr<ProfileSummary> getSummary();
};
/// This is called when a count is seen in the profile.
void ProfileSummaryBuilder::addCount(uint64_t Count) {
TotalCount += Count;
if (Count > MaxCount)
MaxCount = Count;
NumCounts++;
CountFrequencies[Count]++;
}
} // end namespace llvm
#endif // LLVM_PROFILEDATA_PROFILECOMMON_H
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