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/ReduceFunctionBodies.h" 23 #include "deltas/ReduceFunctions.h" 24 #include "deltas/ReduceGlobalObjects.h" 25 #include "deltas/ReduceGlobalValues.h" 26 #include "deltas/ReduceGlobalVarInitializers.h" 27 #include "deltas/ReduceGlobalVars.h" 28 #include "deltas/ReduceIRReferences.h" 29 #include "deltas/ReduceInstructionFlagsMIR.h" 30 #include "deltas/ReduceInstructions.h" 31 #include "deltas/ReduceInstructionsMIR.h" 32 #include "deltas/ReduceMetadata.h" 33 #include "deltas/ReduceModuleData.h" 34 #include "deltas/ReduceOperandBundles.h" 35 #include "deltas/ReduceOperands.h" 36 #include "deltas/ReduceOperandsSkip.h" 37 #include "deltas/ReduceOperandsToArgs.h" 38 #include "deltas/ReduceRegisterUses.h" 39 #include "deltas/ReduceSpecialGlobals.h" 40 #include "deltas/ReduceVirtualRegisters.h" 41 #include "deltas/SimplifyInstructions.h" 42 #include "llvm/Support/CommandLine.h" 43 44 using namespace llvm; 45 46 extern cl::OptionCategory LLVMReduceOptions; 47 static cl::opt<std::string> 48 DeltaPasses("delta-passes", 49 cl::desc("Delta passes to run, separated by commas. By " 50 "default, run all delta passes."), 51 cl::cat(LLVMReduceOptions)); 52 53 #define DELTA_PASSES \ 54 DELTA_PASS("special-globals", reduceSpecialGlobalsDeltaPass) \ 55 DELTA_PASS("aliases", reduceAliasesDeltaPass) \ 56 DELTA_PASS("function-bodies", reduceFunctionBodiesDeltaPass) \ 57 DELTA_PASS("functions", reduceFunctionsDeltaPass) \ 58 DELTA_PASS("basic-blocks", reduceBasicBlocksDeltaPass) \ 59 DELTA_PASS("global-values", reduceGlobalValuesDeltaPass) \ 60 DELTA_PASS("global-objects", reduceGlobalObjectsDeltaPass) \ 61 DELTA_PASS("global-initializers", reduceGlobalsInitializersDeltaPass) \ 62 DELTA_PASS("global-variables", reduceGlobalsDeltaPass) \ 63 DELTA_PASS("metadata", reduceMetadataDeltaPass) \ 64 DELTA_PASS("arguments", reduceArgumentsDeltaPass) \ 65 DELTA_PASS("instructions", reduceInstructionsDeltaPass) \ 66 DELTA_PASS("simplify-instructions", simplifyInstructionsDeltaPass) \ 67 DELTA_PASS("operands-zero", reduceOperandsZeroDeltaPass) \ 68 DELTA_PASS("operands-one", reduceOperandsOneDeltaPass) \ 69 DELTA_PASS("operands-to-args", reduceOperandsToArgsDeltaPass) \ 70 DELTA_PASS("operands-skip", reduceOperandsSkipDeltaPass) \ 71 DELTA_PASS("operand-bundles", reduceOperandBundesDeltaPass) \ 72 DELTA_PASS("attributes", reduceAttributesDeltaPass) \ 73 DELTA_PASS("module-data", reduceModuleDataDeltaPass) 74 75 #define DELTA_PASSES_MIR \ 76 DELTA_PASS("instructions", reduceInstructionsMIRDeltaPass) \ 77 DELTA_PASS("ir-instruction-references", \ 78 reduceIRInstructionReferencesDeltaPass) \ 79 DELTA_PASS("ir-block-references", reduceIRBlockReferencesDeltaPass) \ 80 DELTA_PASS("ir-function-references", reduceIRFunctionReferencesDeltaPass) \ 81 DELTA_PASS("instruction-flags", reduceInstructionFlagsMIRDeltaPass) \ 82 DELTA_PASS("register-uses", reduceRegisterUsesMIRDeltaPass) \ 83 DELTA_PASS("register-hints", reduceVirtualRegisterHintsDeltaPass) 84 85 static void runAllDeltaPasses(TestRunner &Tester) { 86 #define DELTA_PASS(NAME, FUNC) FUNC(Tester); 87 if (Tester.getProgram().isMIR()) { 88 DELTA_PASSES_MIR 89 } else { 90 DELTA_PASSES 91 } 92 #undef DELTA_PASS 93 } 94 95 static void runDeltaPassName(TestRunner &Tester, StringRef PassName) { 96 #define DELTA_PASS(NAME, FUNC) \ 97 if (PassName == NAME) { \ 98 FUNC(Tester); \ 99 return; \ 100 } 101 if (Tester.getProgram().isMIR()) { 102 DELTA_PASSES_MIR 103 } else { 104 DELTA_PASSES 105 } 106 #undef DELTA_PASS 107 errs() << "unknown pass \"" << PassName << "\"\n"; 108 exit(1); 109 } 110 111 void llvm::printDeltaPasses(raw_ostream &OS) { 112 OS << "Delta passes (pass to `--delta-passes=` as a comma separated list):\n"; 113 #define DELTA_PASS(NAME, FUNC) OS << " " << NAME << "\n"; 114 OS << " IR:\n"; 115 DELTA_PASSES 116 OS << " MIR:\n"; 117 DELTA_PASSES_MIR 118 #undef DELTA_PASS 119 } 120 121 void llvm::runDeltaPasses(TestRunner &Tester, int MaxPassIterations) { 122 uint64_t OldComplexity = Tester.getProgram().getComplexityScore(); 123 for (int Iter = 0; Iter < MaxPassIterations; ++Iter) { 124 if (DeltaPasses.empty()) { 125 runAllDeltaPasses(Tester); 126 } else { 127 StringRef Passes = DeltaPasses; 128 while (!Passes.empty()) { 129 auto Split = Passes.split(","); 130 runDeltaPassName(Tester, Split.first); 131 Passes = Split.second; 132 } 133 } 134 uint64_t NewComplexity = Tester.getProgram().getComplexityScore(); 135 if (NewComplexity >= OldComplexity) 136 break; 137 OldComplexity = NewComplexity; 138 } 139 } 140