1 //===- bolt/Utils/CommandLineOpts.cpp - BOLT CLI options ------------------===// 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 // BOLT CLI options 10 // 11 //===----------------------------------------------------------------------===// 12 13 #include "bolt/Utils/CommandLineOpts.h" 14 #include "llvm/Support/VCSRevision.h" 15 16 using namespace llvm; 17 18 namespace llvm { 19 namespace bolt { 20 const char *BoltRevision = 21 #ifdef LLVM_REVISION 22 LLVM_REVISION; 23 #else 24 "<unknown>"; 25 #endif 26 } 27 } 28 29 namespace opts { 30 31 bool HeatmapMode = false; 32 33 cl::OptionCategory BoltCategory("BOLT generic options"); 34 cl::OptionCategory BoltDiffCategory("BOLTDIFF generic options"); 35 cl::OptionCategory BoltOptCategory("BOLT optimization options"); 36 cl::OptionCategory BoltRelocCategory("BOLT options in relocation mode"); 37 cl::OptionCategory BoltOutputCategory("Output options"); 38 cl::OptionCategory AggregatorCategory("Data aggregation options"); 39 cl::OptionCategory BoltInstrCategory("BOLT instrumentation options"); 40 cl::OptionCategory HeatmapCategory("Heatmap options"); 41 42 cl::opt<unsigned> AlignText("align-text", 43 cl::desc("alignment of .text section"), cl::Hidden, 44 cl::cat(BoltCategory)); 45 46 cl::opt<unsigned> AlignFunctions( 47 "align-functions", 48 cl::desc("align functions at a given value (relocation mode)"), 49 cl::init(64), cl::cat(BoltOptCategory)); 50 51 cl::opt<bool> 52 AggregateOnly("aggregate-only", 53 cl::desc("exit after writing aggregated data file"), 54 cl::Hidden, 55 cl::cat(AggregatorCategory)); 56 57 cl::opt<unsigned> 58 BucketsPerLine("line-size", 59 cl::desc("number of entries per line (default 256)"), 60 cl::init(256), cl::Optional, cl::cat(HeatmapCategory)); 61 62 cl::opt<bool> 63 DiffOnly("diff-only", 64 cl::desc("stop processing once we have enough to compare two binaries"), 65 cl::Hidden, 66 cl::cat(BoltDiffCategory)); 67 68 cl::opt<bool> 69 EnableBAT("enable-bat", 70 cl::desc("write BOLT Address Translation tables"), 71 cl::init(false), 72 cl::ZeroOrMore, 73 cl::cat(BoltCategory)); 74 75 cl::opt<bool> EqualizeBBCounts( 76 "equalize-bb-counts", 77 cl::desc("use same count for BBs that should have equivalent count (used " 78 "in non-LBR and shrink wrapping)"), 79 cl::ZeroOrMore, cl::init(false), cl::Hidden, cl::cat(BoltOptCategory)); 80 81 cl::opt<bool> RemoveSymtab("remove-symtab", cl::desc("Remove .symtab section"), 82 cl::cat(BoltCategory)); 83 84 cl::opt<unsigned> 85 ExecutionCountThreshold("execution-count-threshold", 86 cl::desc("perform profiling accuracy-sensitive optimizations only if " 87 "function execution count >= the threshold (default: 0)"), 88 cl::init(0), 89 cl::ZeroOrMore, 90 cl::Hidden, 91 cl::cat(BoltOptCategory)); 92 93 cl::opt<unsigned> 94 HeatmapBlock("block-size", 95 cl::desc("size of a heat map block in bytes (default 64)"), 96 cl::init(64), cl::cat(HeatmapCategory)); 97 98 cl::opt<unsigned long long> HeatmapMaxAddress( 99 "max-address", cl::init(0xffffffff), 100 cl::desc("maximum address considered valid for heatmap (default 4GB)"), 101 cl::Optional, cl::cat(HeatmapCategory)); 102 103 cl::opt<unsigned long long> HeatmapMinAddress( 104 "min-address", cl::init(0x0), 105 cl::desc("minimum address considered valid for heatmap (default 0)"), 106 cl::Optional, cl::cat(HeatmapCategory)); 107 108 cl::opt<bool> HotData("hot-data", 109 cl::desc("hot data symbols support (relocation mode)"), 110 cl::cat(BoltCategory)); 111 112 cl::opt<bool> HotFunctionsAtEnd( 113 "hot-functions-at-end", 114 cl::desc( 115 "if reorder-functions is used, order functions putting hottest last"), 116 cl::cat(BoltCategory)); 117 118 cl::opt<bool> HotText( 119 "hot-text", 120 cl::desc( 121 "Generate hot text symbols. Apply this option to a precompiled binary " 122 "that manually calls into hugify, such that at runtime hugify call " 123 "will put hot code into 2M pages. This requires relocation."), 124 cl::ZeroOrMore, cl::cat(BoltCategory)); 125 126 cl::opt<bool> 127 Instrument("instrument", 128 cl::desc("instrument code to generate accurate profile data"), 129 cl::cat(BoltOptCategory)); 130 131 cl::opt<std::string> 132 OutputFilename("o", 133 cl::desc("<output file>"), 134 cl::Optional, 135 cl::cat(BoltOutputCategory)); 136 137 cl::opt<std::string> PerfData("perfdata", cl::desc("<data file>"), cl::Optional, 138 cl::cat(AggregatorCategory), 139 cl::sub(cl::SubCommand::getAll())); 140 141 static cl::alias 142 PerfDataA("p", 143 cl::desc("alias for -perfdata"), 144 cl::aliasopt(PerfData), 145 cl::cat(AggregatorCategory)); 146 147 cl::opt<bool> PrintCacheMetrics( 148 "print-cache-metrics", 149 cl::desc("calculate and print various metrics for instruction cache"), 150 cl::cat(BoltOptCategory)); 151 152 cl::opt<bool> PrintSections("print-sections", 153 cl::desc("print all registered sections"), 154 cl::Hidden, cl::cat(BoltCategory)); 155 156 cl::opt<ProfileFormatKind> ProfileFormat( 157 "profile-format", 158 cl::desc( 159 "format to dump profile output in aggregation mode, default is fdata"), 160 cl::init(PF_Fdata), 161 cl::values(clEnumValN(PF_Fdata, "fdata", "offset-based plaintext format"), 162 clEnumValN(PF_YAML, "yaml", "dense YAML representation")), 163 cl::ZeroOrMore, cl::Hidden, cl::cat(BoltCategory)); 164 165 cl::opt<std::string> SaveProfile("w", 166 cl::desc("save recorded profile to a file"), 167 cl::cat(BoltOutputCategory)); 168 169 cl::opt<bool> SplitEH("split-eh", cl::desc("split C++ exception handling code"), 170 cl::Hidden, cl::cat(BoltOptCategory)); 171 172 cl::opt<bool> 173 StrictMode("strict", 174 cl::desc("trust the input to be from a well-formed source"), 175 176 cl::cat(BoltCategory)); 177 178 cl::opt<bool> TimeOpts("time-opts", 179 cl::desc("print time spent in each optimization"), 180 cl::cat(BoltOptCategory)); 181 182 cl::opt<bool> TimeRewrite("time-rewrite", 183 cl::desc("print time spent in rewriting passes"), 184 cl::Hidden, cl::cat(BoltCategory)); 185 186 cl::opt<bool> UseOldText( 187 "use-old-text", 188 cl::desc("re-use space in old .text if possible (relocation mode)"), 189 cl::cat(BoltCategory)); 190 191 cl::opt<bool> UpdateDebugSections( 192 "update-debug-sections", 193 cl::desc("update DWARF debug sections of the executable"), 194 cl::cat(BoltCategory)); 195 196 cl::opt<unsigned> 197 Verbosity("v", cl::desc("set verbosity level for diagnostic output"), 198 cl::init(0), cl::ZeroOrMore, cl::cat(BoltCategory), 199 cl::sub(cl::SubCommand::getAll())); 200 201 bool processAllFunctions() { 202 if (opts::AggregateOnly) 203 return false; 204 205 if (UseOldText || StrictMode) 206 return true; 207 208 return false; 209 } 210 211 } // namespace opts 212