1 //===-- HeatUtils.cpp - Utility for printing heat colors --------*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // Utility for printing heat colors based on heuristics or profiling 10 // information. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #include "llvm/Analysis/HeatUtils.h" 15 #include "llvm/Analysis/BlockFrequencyInfo.h" 16 #include "llvm/IR/Instructions.h" 17 18 #include <cmath> 19 20 namespace llvm { 21 22 static const unsigned heatSize = 100; 23 static const char heatPalette[heatSize][8] = { 24 "#3d50c3", "#4055c8", "#4358cb", "#465ecf", "#4961d2", "#4c66d6", "#4f69d9", 25 "#536edd", "#5572df", "#5977e3", "#5b7ae5", "#5f7fe8", "#6282ea", "#6687ed", 26 "#6a8bef", "#6c8ff1", "#7093f3", "#7396f5", "#779af7", "#7a9df8", "#7ea1fa", 27 "#81a4fb", "#85a8fc", "#88abfd", "#8caffe", "#8fb1fe", "#93b5fe", "#96b7ff", 28 "#9abbff", "#9ebeff", "#a1c0ff", "#a5c3fe", "#a7c5fe", "#abc8fd", "#aec9fc", 29 "#b2ccfb", "#b5cdfa", "#b9d0f9", "#bbd1f8", "#bfd3f6", "#c1d4f4", "#c5d6f2", 30 "#c7d7f0", "#cbd8ee", "#cedaeb", "#d1dae9", "#d4dbe6", "#d6dce4", "#d9dce1", 31 "#dbdcde", "#dedcdb", "#e0dbd8", "#e3d9d3", "#e5d8d1", "#e8d6cc", "#ead5c9", 32 "#ecd3c5", "#eed0c0", "#efcebd", "#f1ccb8", "#f2cab5", "#f3c7b1", "#f4c5ad", 33 "#f5c1a9", "#f6bfa6", "#f7bca1", "#f7b99e", "#f7b599", "#f7b396", "#f7af91", 34 "#f7ac8e", "#f7a889", "#f6a385", "#f5a081", "#f59c7d", "#f4987a", "#f39475", 35 "#f29072", "#f08b6e", "#ef886b", "#ed8366", "#ec7f63", "#e97a5f", "#e8765c", 36 "#e57058", "#e36c55", "#e16751", "#de614d", "#dc5d4a", "#d85646", "#d65244", 37 "#d24b40", "#d0473d", "#cc403a", "#ca3b37", "#c53334", "#c32e31", "#be242e", 38 "#bb1b2c", "#b70d28"}; 39 40 uint64_t 41 getNumOfCalls(Function &callerFunction, Function &calledFunction) { 42 uint64_t counter = 0; 43 for (User *U : calledFunction.users()) { 44 if (auto CI = dyn_cast<CallInst>(U)) { 45 if (CI->getCaller() == (&callerFunction)) { 46 counter += 1; 47 } 48 } 49 } 50 return counter; 51 } 52 53 uint64_t getMaxFreq(const Function &F, const BlockFrequencyInfo *BFI) { 54 uint64_t maxFreq = 0; 55 for (const BasicBlock &BB : F) { 56 uint64_t freqVal = BFI->getBlockFreq(&BB).getFrequency(); 57 if (freqVal >= maxFreq) 58 maxFreq = freqVal; 59 } 60 return maxFreq; 61 } 62 63 std::string getHeatColor(uint64_t freq, uint64_t maxFreq) { 64 if (freq > maxFreq) 65 freq = maxFreq; 66 double percent = (freq > 0) ? log2(double(freq)) / log2(maxFreq) : 0; 67 return getHeatColor(percent); 68 } 69 70 std::string getHeatColor(double percent) { 71 if (percent > 1.0) 72 percent = 1.0; 73 if (percent < 0.0) 74 percent = 0.0; 75 unsigned colorId = unsigned(round(percent * (heatSize - 1.0))); 76 return heatPalette[colorId]; 77 } 78 79 } // namespace llvm 80