llvm/include/llvm/Analysis/HeatUtils.h

//===-- HeatUtils.h - Utility for printing heat colors ----------*- 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
//
//===----------------------------------------------------------------------===//
//
// Utility for printing heat colors based on profiling information.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_ANALYSIS_HEATUTILS_H
#define LLVM_ANALYSIS_HEATUTILS_H

#include <cstdint>
#include <string>

namespace llvm {

class BlockFrequencyInfo;
class Function;

// Returns number of calls of calledFunction by callerFunction.
uint64_t
getNumOfCalls(Function &callerFunction, Function &calledFunction);

// Returns the maximum frequency of a BB in a function.
uint64_t getMaxFreq(const Function &F, const BlockFrequencyInfo *BFI);

// Calculates heat color based on current and maximum frequencies.
std::string getHeatColor(uint64_t freq, uint64_t maxFreq);

// Calculates heat color based on percent of "hotness".
std::string getHeatColor(double percent);

} // namespace llvm

#endif