| //===-- llvm/CodeGen/MachineModuleInfo.cpp ----------------------*- C++ -*-===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "llvm/CodeGen/MachineModuleInfo.h" |
| #include "llvm/ADT/DenseMap.h" |
| #include "llvm/ADT/StringRef.h" |
| #include "llvm/CodeGen/MachineFunction.h" |
| #include "llvm/CodeGen/Passes.h" |
| #include "llvm/IR/Constants.h" |
| #include "llvm/IR/DiagnosticInfo.h" |
| #include "llvm/IR/LLVMContext.h" |
| #include "llvm/IR/Module.h" |
| #include "llvm/InitializePasses.h" |
| #include "llvm/MC/MCContext.h" |
| #include "llvm/Pass.h" |
| #include "llvm/Support/CommandLine.h" |
| #include "llvm/Support/ErrorHandling.h" |
| #include "llvm/Target/TargetLoweringObjectFile.h" |
| #include "llvm/Target/TargetMachine.h" |
| #include <algorithm> |
| #include <cassert> |
| #include <memory> |
| #include <utility> |
| #include <vector> |
| |
| using namespace llvm; |
| using namespace llvm::dwarf; |
| |
| static cl::opt<bool> |
| DisableDebugInfoPrinting("disable-debug-info-print", cl::Hidden, |
| cl::desc("Disable debug info printing")); |
| |
| // Out of line virtual method. |
| MachineModuleInfoImpl::~MachineModuleInfoImpl() = default; |
| |
| void MachineModuleInfo::initialize() { |
| ObjFileMMI = nullptr; |
| CurCallSite = 0; |
| NextFnNum = 0; |
| UsesMSVCFloatingPoint = false; |
| DbgInfoAvailable = false; |
| } |
| |
| void MachineModuleInfo::finalize() { |
| Context.reset(); |
| // We don't clear the ExternalContext. |
| |
| delete ObjFileMMI; |
| ObjFileMMI = nullptr; |
| } |
| |
| MachineModuleInfo::MachineModuleInfo(MachineModuleInfo &&MMI) |
| : TM(std::move(MMI.TM)), |
| Context(TM.getTargetTriple(), TM.getMCAsmInfo(), TM.getMCRegisterInfo(), |
| TM.getMCSubtargetInfo(), nullptr, &TM.Options.MCOptions, false), |
| MachineFunctions(std::move(MMI.MachineFunctions)) { |
| Context.setObjectFileInfo(TM.getObjFileLowering()); |
| ObjFileMMI = MMI.ObjFileMMI; |
| CurCallSite = MMI.CurCallSite; |
| ExternalContext = MMI.ExternalContext; |
| TheModule = MMI.TheModule; |
| } |
| |
| MachineModuleInfo::MachineModuleInfo(const LLVMTargetMachine *TM) |
| : TM(*TM), Context(TM->getTargetTriple(), TM->getMCAsmInfo(), |
| TM->getMCRegisterInfo(), TM->getMCSubtargetInfo(), |
| nullptr, &TM->Options.MCOptions, false) { |
| Context.setObjectFileInfo(TM->getObjFileLowering()); |
| initialize(); |
| } |
| |
| MachineModuleInfo::MachineModuleInfo(const LLVMTargetMachine *TM, |
| MCContext *ExtContext) |
| : TM(*TM), Context(TM->getTargetTriple(), TM->getMCAsmInfo(), |
| TM->getMCRegisterInfo(), TM->getMCSubtargetInfo(), |
| nullptr, &TM->Options.MCOptions, false), |
| ExternalContext(ExtContext) { |
| Context.setObjectFileInfo(TM->getObjFileLowering()); |
| initialize(); |
| } |
| |
| MachineModuleInfo::~MachineModuleInfo() { finalize(); } |
| |
| MachineFunction * |
| MachineModuleInfo::getMachineFunction(const Function &F) const { |
| auto I = MachineFunctions.find(&F); |
| return I != MachineFunctions.end() ? I->second.get() : nullptr; |
| } |
| |
| MachineFunction &MachineModuleInfo::getOrCreateMachineFunction(Function &F) { |
| // Shortcut for the common case where a sequence of MachineFunctionPasses |
| // all query for the same Function. |
| if (LastRequest == &F) |
| return *LastResult; |
| |
| auto I = MachineFunctions.insert( |
| std::make_pair(&F, std::unique_ptr<MachineFunction>())); |
| MachineFunction *MF; |
| if (I.second) { |
| // No pre-existing machine function, create a new one. |
| const TargetSubtargetInfo &STI = *TM.getSubtargetImpl(F); |
| MF = new MachineFunction(F, TM, STI, NextFnNum++, *this); |
| MF->initTargetMachineFunctionInfo(STI); |
| |
| // MRI callback for target specific initializations. |
| TM.registerMachineRegisterInfoCallback(*MF); |
| |
| // Update the set entry. |
| I.first->second.reset(MF); |
| } else { |
| MF = I.first->second.get(); |
| } |
| |
| LastRequest = &F; |
| LastResult = MF; |
| return *MF; |
| } |
| |
| void MachineModuleInfo::deleteMachineFunctionFor(Function &F) { |
| MachineFunctions.erase(&F); |
| LastRequest = nullptr; |
| LastResult = nullptr; |
| } |
| |
| void MachineModuleInfo::insertFunction(const Function &F, |
| std::unique_ptr<MachineFunction> &&MF) { |
| auto I = MachineFunctions.insert(std::make_pair(&F, std::move(MF))); |
| assert(I.second && "machine function already mapped"); |
| (void)I; |
| } |
| |
| namespace { |
| |
| /// This pass frees the MachineFunction object associated with a Function. |
| class FreeMachineFunction : public FunctionPass { |
| public: |
| static char ID; |
| |
| FreeMachineFunction() : FunctionPass(ID) {} |
| |
| void getAnalysisUsage(AnalysisUsage &AU) const override { |
| AU.addRequired<MachineModuleInfoWrapperPass>(); |
| AU.addPreserved<MachineModuleInfoWrapperPass>(); |
| } |
| |
| bool runOnFunction(Function &F) override { |
| MachineModuleInfo &MMI = |
| getAnalysis<MachineModuleInfoWrapperPass>().getMMI(); |
| MMI.deleteMachineFunctionFor(F); |
| return true; |
| } |
| |
| StringRef getPassName() const override { |
| return "Free MachineFunction"; |
| } |
| }; |
| |
| } // end anonymous namespace |
| |
| char FreeMachineFunction::ID; |
| |
| FunctionPass *llvm::createFreeMachineFunctionPass() { |
| return new FreeMachineFunction(); |
| } |
| |
| MachineModuleInfoWrapperPass::MachineModuleInfoWrapperPass( |
| const LLVMTargetMachine *TM) |
| : ImmutablePass(ID), MMI(TM) { |
| initializeMachineModuleInfoWrapperPassPass(*PassRegistry::getPassRegistry()); |
| } |
| |
| MachineModuleInfoWrapperPass::MachineModuleInfoWrapperPass( |
| const LLVMTargetMachine *TM, MCContext *ExtContext) |
| : ImmutablePass(ID), MMI(TM, ExtContext) { |
| initializeMachineModuleInfoWrapperPassPass(*PassRegistry::getPassRegistry()); |
| } |
| |
| // Handle the Pass registration stuff necessary to use DataLayout's. |
| INITIALIZE_PASS(MachineModuleInfoWrapperPass, "machinemoduleinfo", |
| "Machine Module Information", false, false) |
| char MachineModuleInfoWrapperPass::ID = 0; |
| |
| static unsigned getLocCookie(const SMDiagnostic &SMD, const SourceMgr &SrcMgr, |
| std::vector<const MDNode *> &LocInfos) { |
| // Look up a LocInfo for the buffer this diagnostic is coming from. |
| unsigned BufNum = SrcMgr.FindBufferContainingLoc(SMD.getLoc()); |
| const MDNode *LocInfo = nullptr; |
| if (BufNum > 0 && BufNum <= LocInfos.size()) |
| LocInfo = LocInfos[BufNum - 1]; |
| |
| // If the inline asm had metadata associated with it, pull out a location |
| // cookie corresponding to which line the error occurred on. |
| unsigned LocCookie = 0; |
| if (LocInfo) { |
| unsigned ErrorLine = SMD.getLineNo() - 1; |
| if (ErrorLine >= LocInfo->getNumOperands()) |
| ErrorLine = 0; |
| |
| if (LocInfo->getNumOperands() != 0) |
| if (const ConstantInt *CI = |
| mdconst::dyn_extract<ConstantInt>(LocInfo->getOperand(ErrorLine))) |
| LocCookie = CI->getZExtValue(); |
| } |
| |
| return LocCookie; |
| } |
| |
| bool MachineModuleInfoWrapperPass::doInitialization(Module &M) { |
| MMI.initialize(); |
| MMI.TheModule = &M; |
| // FIXME: Do this for new pass manager. |
| LLVMContext &Ctx = M.getContext(); |
| MMI.getContext().setDiagnosticHandler( |
| [&Ctx, &M](const SMDiagnostic &SMD, bool IsInlineAsm, |
| const SourceMgr &SrcMgr, |
| std::vector<const MDNode *> &LocInfos) { |
| unsigned LocCookie = 0; |
| if (IsInlineAsm) |
| LocCookie = getLocCookie(SMD, SrcMgr, LocInfos); |
| Ctx.diagnose( |
| DiagnosticInfoSrcMgr(SMD, M.getName(), IsInlineAsm, LocCookie)); |
| }); |
| MMI.DbgInfoAvailable = !DisableDebugInfoPrinting && |
| !M.debug_compile_units().empty(); |
| return false; |
| } |
| |
| bool MachineModuleInfoWrapperPass::doFinalization(Module &M) { |
| MMI.finalize(); |
| return false; |
| } |
| |
| AnalysisKey MachineModuleAnalysis::Key; |
| |
| MachineModuleInfo MachineModuleAnalysis::run(Module &M, |
| ModuleAnalysisManager &) { |
| MachineModuleInfo MMI(TM); |
| MMI.TheModule = &M; |
| MMI.DbgInfoAvailable = !DisableDebugInfoPrinting && |
| !M.debug_compile_units().empty(); |
| return MMI; |
| } |