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