1 //===---------- MachinePassManager.cpp ------------------------------------===// 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 contains the pass management machinery for machine functions. 10 // 11 //===----------------------------------------------------------------------===// 12 13 #include "llvm/CodeGen/MachinePassManager.h" 14 #include "llvm/CodeGen/FreeMachineFunction.h" 15 #include "llvm/CodeGen/MachineFunction.h" 16 #include "llvm/CodeGen/MachineModuleInfo.h" 17 #include "llvm/IR/PassManagerImpl.h" 18 19 using namespace llvm; 20 21 namespace llvm { 22 template class AllAnalysesOn<MachineFunction>; 23 template class AnalysisManager<MachineFunction>; 24 template class PassManager<MachineFunction>; 25 26 Error MachineFunctionPassManager::run(Module &M, 27 MachineFunctionAnalysisManager &MFAM) { 28 // MachineModuleAnalysis is a module analysis pass that is never invalidated 29 // because we don't run any module pass in codegen pipeline. This is very 30 // important because the codegen state is stored in MMI which is the analysis 31 // result of MachineModuleAnalysis. MMI should not be recomputed. 32 auto &MMI = MFAM.getResult<MachineModuleAnalysis>(M).getMMI(); 33 34 (void)RequireCodeGenSCCOrder; 35 assert(!RequireCodeGenSCCOrder && "not implemented"); 36 37 // M is unused here 38 PassInstrumentation PI = MFAM.getResult<PassInstrumentationAnalysis>(M); 39 40 // Add a PIC to verify machine functions. 41 if (VerifyMachineFunction) { 42 // No need to pop this callback later since MIR pipeline is flat which means 43 // current pipeline is the top-level pipeline. Callbacks are not used after 44 // current pipeline. 45 PI.pushBeforeNonSkippedPassCallback([&MFAM](StringRef PassID, Any IR) { 46 assert(llvm::any_cast<const MachineFunction *>(&IR)); 47 const MachineFunction *MF = llvm::any_cast<const MachineFunction *>(IR); 48 assert(MF && "Machine function should be valid for printing"); 49 std::string Banner = std::string("After ") + std::string(PassID); 50 verifyMachineFunction(&MFAM, Banner, *MF); 51 }); 52 } 53 54 for (auto &F : InitializationFuncs) { 55 if (auto Err = F(M, MFAM)) 56 return Err; 57 } 58 59 unsigned Idx = 0; 60 size_t Size = Passes.size(); 61 do { 62 // Run machine module passes 63 for (; MachineModulePasses.count(Idx) && Idx != Size; ++Idx) { 64 if (!PI.runBeforePass<Module>(*Passes[Idx], M)) 65 continue; 66 if (auto Err = MachineModulePasses.at(Idx)(M, MFAM)) 67 return Err; 68 PI.runAfterPass(*Passes[Idx], M, PreservedAnalyses::all()); 69 } 70 71 // Finish running all passes. 72 if (Idx == Size) 73 break; 74 75 // Run machine function passes 76 77 // Get index range of machine function passes. 78 unsigned Begin = Idx; 79 for (; !MachineModulePasses.count(Idx) && Idx != Size; ++Idx) 80 ; 81 82 for (Function &F : M) { 83 // Do not codegen any 'available_externally' functions at all, they have 84 // definitions outside the translation unit. 85 if (F.hasAvailableExternallyLinkage()) 86 continue; 87 88 MachineFunction &MF = MMI.getOrCreateMachineFunction(F); 89 90 for (unsigned I = Begin, E = Idx; I != E; ++I) { 91 auto *P = Passes[I].get(); 92 93 if (!PI.runBeforePass<MachineFunction>(*P, MF)) 94 continue; 95 96 // TODO: EmitSizeRemarks 97 PreservedAnalyses PassPA = P->run(MF, MFAM); 98 99 // MF is dangling after FreeMachineFunctionPass 100 if (P->name() != FreeMachineFunctionPass::name()) { 101 MFAM.invalidate(MF, PassPA); 102 103 PI.runAfterPass(*P, MF, PassPA); 104 } 105 } 106 } 107 } while (true); 108 109 for (auto &F : FinalizationFuncs) { 110 if (auto Err = F(M, MFAM)) 111 return Err; 112 } 113 114 return Error::success(); 115 } 116 117 } // namespace llvm 118