1 //===- DeltaManager.cpp - Runs Delta Passes to reduce Input ---------------===// 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 // This file calls each specialized Delta pass in order to reduce the input IR 10 // file. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #include "DeltaManager.h" 15 #include "ReducerWorkItem.h" 16 #include "TestRunner.h" 17 #include "deltas/Delta.h" 18 #include "deltas/ReduceAliases.h" 19 #include "deltas/ReduceArguments.h" 20 #include "deltas/ReduceAttributes.h" 21 #include "deltas/ReduceBasicBlocks.h" 22 #include "deltas/ReduceDIMetadata.h" 23 #include "deltas/ReduceFunctionBodies.h" 24 #include "deltas/ReduceFunctions.h" 25 #include "deltas/ReduceGlobalObjects.h" 26 #include "deltas/ReduceGlobalValues.h" 27 #include "deltas/ReduceGlobalVarInitializers.h" 28 #include "deltas/ReduceGlobalVars.h" 29 #include "deltas/ReduceIRReferences.h" 30 #include "deltas/ReduceInstructionFlags.h" 31 #include "deltas/ReduceInstructionFlagsMIR.h" 32 #include "deltas/ReduceInstructions.h" 33 #include "deltas/ReduceInstructionsMIR.h" 34 #include "deltas/ReduceMemoryOperations.h" 35 #include "deltas/ReduceMetadata.h" 36 #include "deltas/ReduceModuleData.h" 37 #include "deltas/ReduceOpcodes.h" 38 #include "deltas/ReduceOperandBundles.h" 39 #include "deltas/ReduceOperands.h" 40 #include "deltas/ReduceOperandsSkip.h" 41 #include "deltas/ReduceOperandsToArgs.h" 42 #include "deltas/ReduceRegisterDefs.h" 43 #include "deltas/ReduceRegisterMasks.h" 44 #include "deltas/ReduceRegisterUses.h" 45 #include "deltas/ReduceSpecialGlobals.h" 46 #include "deltas/ReduceUsingSimplifyCFG.h" 47 #include "deltas/ReduceVirtualRegisters.h" 48 #include "deltas/RunIRPasses.h" 49 #include "deltas/SimplifyInstructions.h" 50 #include "deltas/StripDebugInfo.h" 51 #include "llvm/Support/CommandLine.h" 52 53 using namespace llvm; 54 55 using SmallStringSet = SmallSet<StringRef, 8>; 56 57 extern cl::OptionCategory LLVMReduceOptions; 58 static cl::list<std::string> 59 DeltaPasses("delta-passes", 60 cl::desc("Delta passes to run, separated by commas. By " 61 "default, run all delta passes."), 62 cl::cat(LLVMReduceOptions), cl::CommaSeparated); 63 64 static cl::list<std::string> 65 SkipDeltaPasses("skip-delta-passes", 66 cl::desc("Delta passes to not run, separated by commas. By " 67 "default, run all delta passes."), 68 cl::cat(LLVMReduceOptions), cl::CommaSeparated); 69 70 #define DELTA_PASSES \ 71 do { \ 72 DELTA_PASS("strip-debug-info", stripDebugInfoDeltaPass) \ 73 DELTA_PASS("functions", reduceFunctionsDeltaPass) \ 74 DELTA_PASS("function-bodies", reduceFunctionBodiesDeltaPass) \ 75 DELTA_PASS("special-globals", reduceSpecialGlobalsDeltaPass) \ 76 DELTA_PASS("aliases", reduceAliasesDeltaPass) \ 77 DELTA_PASS("basic-blocks", reduceBasicBlocksDeltaPass) \ 78 DELTA_PASS("global-values", reduceGlobalValuesDeltaPass) \ 79 DELTA_PASS("global-objects", reduceGlobalObjectsDeltaPass) \ 80 DELTA_PASS("global-initializers", reduceGlobalsInitializersDeltaPass) \ 81 DELTA_PASS("global-variables", reduceGlobalsDeltaPass) \ 82 DELTA_PASS("di-metadata", reduceDIMetadataDeltaPass) \ 83 DELTA_PASS("metadata", reduceMetadataDeltaPass) \ 84 DELTA_PASS("arguments", reduceArgumentsDeltaPass) \ 85 DELTA_PASS("instructions", reduceInstructionsDeltaPass) \ 86 DELTA_PASS("simplify-instructions", simplifyInstructionsDeltaPass) \ 87 DELTA_PASS("ir-passes", runIRPassesDeltaPass) \ 88 DELTA_PASS("operands-zero", reduceOperandsZeroDeltaPass) \ 89 DELTA_PASS("operands-one", reduceOperandsOneDeltaPass) \ 90 DELTA_PASS("operands-nan", reduceOperandsNaNDeltaPass) \ 91 DELTA_PASS("operands-to-args", reduceOperandsToArgsDeltaPass) \ 92 DELTA_PASS("operands-skip", reduceOperandsSkipDeltaPass) \ 93 DELTA_PASS("operand-bundles", reduceOperandBundesDeltaPass) \ 94 DELTA_PASS("simplify-cfg", reduceUsingSimplifyCFGDeltaPass) \ 95 DELTA_PASS("attributes", reduceAttributesDeltaPass) \ 96 DELTA_PASS("module-data", reduceModuleDataDeltaPass) \ 97 DELTA_PASS("opcodes", reduceOpcodesDeltaPass) \ 98 DELTA_PASS("volatile", reduceVolatileInstructionsDeltaPass) \ 99 DELTA_PASS("instruction-flags", reduceInstructionFlagsDeltaPass) \ 100 } while (false) 101 102 #define DELTA_PASSES_MIR \ 103 do { \ 104 DELTA_PASS("instructions", reduceInstructionsMIRDeltaPass) \ 105 DELTA_PASS("ir-instruction-references", \ 106 reduceIRInstructionReferencesDeltaPass) \ 107 DELTA_PASS("ir-block-references", reduceIRBlockReferencesDeltaPass) \ 108 DELTA_PASS("ir-function-references", reduceIRFunctionReferencesDeltaPass) \ 109 DELTA_PASS("instruction-flags", reduceInstructionFlagsMIRDeltaPass) \ 110 DELTA_PASS("register-uses", reduceRegisterUsesMIRDeltaPass) \ 111 DELTA_PASS("register-defs", reduceRegisterDefsMIRDeltaPass) \ 112 DELTA_PASS("register-hints", reduceVirtualRegisterHintsDeltaPass) \ 113 DELTA_PASS("register-masks", reduceRegisterMasksMIRDeltaPass) \ 114 } while (false) 115 116 static void runAllDeltaPasses(TestRunner &Tester, 117 const SmallStringSet &SkipPass) { 118 #define DELTA_PASS(NAME, FUNC) \ 119 if (!SkipPass.count(NAME)) { \ 120 FUNC(Tester); \ 121 } 122 if (Tester.getProgram().isMIR()) { 123 DELTA_PASSES_MIR; 124 } else { 125 DELTA_PASSES; 126 } 127 #undef DELTA_PASS 128 } 129 130 static void runDeltaPassName(TestRunner &Tester, StringRef PassName) { 131 #define DELTA_PASS(NAME, FUNC) \ 132 if (PassName == NAME) { \ 133 FUNC(Tester); \ 134 return; \ 135 } 136 if (Tester.getProgram().isMIR()) { 137 DELTA_PASSES_MIR; 138 } else { 139 DELTA_PASSES; 140 } 141 #undef DELTA_PASS 142 143 // We should have errored on unrecognized passes before trying to run 144 // anything. 145 llvm_unreachable("unknown delta pass"); 146 } 147 148 void llvm::printDeltaPasses(raw_ostream &OS) { 149 OS << "Delta passes (pass to `--delta-passes=` as a comma separated list):\n"; 150 #define DELTA_PASS(NAME, FUNC) OS << " " << NAME << "\n"; 151 OS << " IR:\n"; 152 DELTA_PASSES; 153 OS << " MIR:\n"; 154 DELTA_PASSES_MIR; 155 #undef DELTA_PASS 156 } 157 158 // Built a set of available delta passes. 159 static void collectPassNames(const TestRunner &Tester, 160 SmallStringSet &NameSet) { 161 #define DELTA_PASS(NAME, FUNC) NameSet.insert(NAME); 162 if (Tester.getProgram().isMIR()) { 163 DELTA_PASSES_MIR; 164 } else { 165 DELTA_PASSES; 166 } 167 #undef DELTA_PASS 168 } 169 170 /// Verify all requested or skipped passes are valid names, and return them in a 171 /// set. 172 static SmallStringSet handlePassList(const TestRunner &Tester, 173 const cl::list<std::string> &PassList) { 174 SmallStringSet AllPasses; 175 collectPassNames(Tester, AllPasses); 176 177 SmallStringSet PassSet; 178 for (StringRef PassName : PassList) { 179 if (!AllPasses.count(PassName)) { 180 errs() << "unknown pass \"" << PassName << "\"\n"; 181 exit(1); 182 } 183 184 PassSet.insert(PassName); 185 } 186 187 return PassSet; 188 } 189 190 void llvm::runDeltaPasses(TestRunner &Tester, int MaxPassIterations) { 191 uint64_t OldComplexity = Tester.getProgram().getComplexityScore(); 192 193 SmallStringSet RunPassSet, SkipPassSet; 194 195 if (!DeltaPasses.empty()) 196 RunPassSet = handlePassList(Tester, DeltaPasses); 197 198 if (!SkipDeltaPasses.empty()) 199 SkipPassSet = handlePassList(Tester, SkipDeltaPasses); 200 201 for (int Iter = 0; Iter < MaxPassIterations; ++Iter) { 202 if (DeltaPasses.empty()) { 203 runAllDeltaPasses(Tester, SkipPassSet); 204 } else { 205 for (StringRef PassName : DeltaPasses) { 206 if (!SkipPassSet.count(PassName)) 207 runDeltaPassName(Tester, PassName); 208 } 209 } 210 211 uint64_t NewComplexity = Tester.getProgram().getComplexityScore(); 212 if (NewComplexity >= OldComplexity) 213 break; 214 OldComplexity = NewComplexity; 215 } 216 } 217