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