1 //===--------------------- InstructionInfoView.cpp --------------*- 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 /// \file 9 /// 10 /// This file implements the InstructionInfoView API. 11 /// 12 //===----------------------------------------------------------------------===// 13 14 #include "Views/InstructionInfoView.h" 15 #include "llvm/Support/FormattedStream.h" 16 #include "llvm/Support/JSON.h" 17 18 namespace llvm { 19 namespace mca { 20 21 void InstructionInfoView::printView(raw_ostream &OS) const { 22 std::string Buffer; 23 raw_string_ostream TempStream(Buffer); 24 25 ArrayRef<llvm::MCInst> Source = getSource(); 26 if (!Source.size()) 27 return; 28 29 IIVDVec IIVD(Source.size()); 30 collectData(IIVD); 31 32 TempStream << "\n\nInstruction Info:\n"; 33 TempStream << "[1]: #uOps\n[2]: Latency\n[3]: RThroughput\n" 34 << "[4]: MayLoad\n[5]: MayStore\n[6]: HasSideEffects (U)\n"; 35 if (PrintBarriers) { 36 TempStream << "[7]: LoadBarrier\n[8]: StoreBarrier\n"; 37 } 38 if (PrintEncodings) { 39 if (PrintBarriers) { 40 TempStream << "[9]: Encoding Size\n"; 41 TempStream << "\n[1] [2] [3] [4] [5] [6] [7] [8] " 42 << "[9] Encodings: Instructions:\n"; 43 } else { 44 TempStream << "[7]: Encoding Size\n"; 45 TempStream << "\n[1] [2] [3] [4] [5] [6] [7] " 46 << "Encodings: Instructions:\n"; 47 } 48 } else { 49 if (PrintBarriers) { 50 TempStream << "\n[1] [2] [3] [4] [5] [6] [7] [8] " 51 << "Instructions:\n"; 52 } else { 53 TempStream << "\n[1] [2] [3] [4] [5] [6] " 54 << "Instructions:\n"; 55 } 56 } 57 58 int Index = 0; 59 for (const auto &I : enumerate(zip(IIVD, Source))) { 60 const InstructionInfoViewData &IIVDEntry = std::get<0>(I.value()); 61 62 TempStream << ' ' << IIVDEntry.NumMicroOpcodes << " "; 63 if (IIVDEntry.NumMicroOpcodes < 10) 64 TempStream << " "; 65 else if (IIVDEntry.NumMicroOpcodes < 100) 66 TempStream << ' '; 67 TempStream << IIVDEntry.Latency << " "; 68 if (IIVDEntry.Latency < 10) 69 TempStream << " "; 70 else if (IIVDEntry.Latency < 100) 71 TempStream << ' '; 72 73 if (IIVDEntry.RThroughput) { 74 double RT = *IIVDEntry.RThroughput; 75 TempStream << format("%.2f", RT) << ' '; 76 if (RT < 10.0) 77 TempStream << " "; 78 else if (RT < 100.0) 79 TempStream << ' '; 80 } else { 81 TempStream << " - "; 82 } 83 TempStream << (IIVDEntry.mayLoad ? " * " : " "); 84 TempStream << (IIVDEntry.mayStore ? " * " : " "); 85 TempStream << (IIVDEntry.hasUnmodeledSideEffects ? " U " : " "); 86 87 if (PrintBarriers) { 88 TempStream << (LoweredInsts[Index]->isALoadBarrier() ? " * " 89 : " "); 90 TempStream << (LoweredInsts[Index]->isAStoreBarrier() ? " * " 91 : " "); 92 } 93 94 if (PrintEncodings) { 95 StringRef Encoding(CE.getEncoding(I.index())); 96 unsigned EncodingSize = Encoding.size(); 97 TempStream << " " << EncodingSize 98 << (EncodingSize < 10 ? " " : " "); 99 TempStream.flush(); 100 formatted_raw_ostream FOS(TempStream); 101 for (unsigned i = 0, e = Encoding.size(); i != e; ++i) 102 FOS << format("%02x ", (uint8_t)Encoding[i]); 103 FOS.PadToColumn(30); 104 FOS.flush(); 105 } 106 107 const MCInst &Inst = std::get<1>(I.value()); 108 TempStream << printInstructionString(Inst) << '\n'; 109 ++Index; 110 } 111 112 TempStream.flush(); 113 OS << Buffer; 114 } 115 116 void InstructionInfoView::collectData( 117 MutableArrayRef<InstructionInfoViewData> IIVD) const { 118 const llvm::MCSubtargetInfo &STI = getSubTargetInfo(); 119 const MCSchedModel &SM = STI.getSchedModel(); 120 for (const auto I : zip(getSource(), IIVD)) { 121 const MCInst &Inst = std::get<0>(I); 122 InstructionInfoViewData &IIVDEntry = std::get<1>(I); 123 const MCInstrDesc &MCDesc = MCII.get(Inst.getOpcode()); 124 125 // Obtain the scheduling class information from the instruction. 126 unsigned SchedClassID = MCDesc.getSchedClass(); 127 unsigned CPUID = SM.getProcessorID(); 128 129 // Try to solve variant scheduling classes. 130 while (SchedClassID && SM.getSchedClassDesc(SchedClassID)->isVariant()) 131 SchedClassID = 132 STI.resolveVariantSchedClass(SchedClassID, &Inst, &MCII, CPUID); 133 134 const MCSchedClassDesc &SCDesc = *SM.getSchedClassDesc(SchedClassID); 135 IIVDEntry.NumMicroOpcodes = SCDesc.NumMicroOps; 136 IIVDEntry.Latency = MCSchedModel::computeInstrLatency(STI, SCDesc); 137 // Add extra latency due to delays in the forwarding data paths. 138 IIVDEntry.Latency += MCSchedModel::getForwardingDelayCycles( 139 STI.getReadAdvanceEntries(SCDesc)); 140 IIVDEntry.RThroughput = MCSchedModel::getReciprocalThroughput(STI, SCDesc); 141 IIVDEntry.mayLoad = MCDesc.mayLoad(); 142 IIVDEntry.mayStore = MCDesc.mayStore(); 143 IIVDEntry.hasUnmodeledSideEffects = MCDesc.hasUnmodeledSideEffects(); 144 } 145 } 146 147 // Construct a JSON object from a single InstructionInfoViewData object. 148 json::Object 149 InstructionInfoView::toJSON(const InstructionInfoViewData &IIVD) const { 150 json::Object JO({{"NumMicroOpcodes", IIVD.NumMicroOpcodes}, 151 {"Latency", IIVD.Latency}, 152 {"mayLoad", IIVD.mayLoad}, 153 {"mayStore", IIVD.mayStore}, 154 {"hasUnmodeledSideEffects", IIVD.hasUnmodeledSideEffects}}); 155 JO.try_emplace("RThroughput", IIVD.RThroughput.value_or(0.0)); 156 return JO; 157 } 158 159 json::Value InstructionInfoView::toJSON() const { 160 ArrayRef<llvm::MCInst> Source = getSource(); 161 if (!Source.size()) 162 return json::Value(0); 163 164 IIVDVec IIVD(Source.size()); 165 collectData(IIVD); 166 167 json::Array InstInfo; 168 for (const auto &I : enumerate(IIVD)) { 169 const InstructionInfoViewData &IIVDEntry = I.value(); 170 json::Object JO = toJSON(IIVDEntry); 171 JO.try_emplace("Instruction", (unsigned)I.index()); 172 InstInfo.push_back(std::move(JO)); 173 } 174 return json::Object({{"InstructionList", json::Value(std::move(InstInfo))}}); 175 } 176 } // namespace mca. 177 } // namespace llvm 178