diff options
Diffstat (limited to 'contrib/llvm/lib/CodeGen/MachineModuleInfo.cpp')
| -rw-r--r-- | contrib/llvm/lib/CodeGen/MachineModuleInfo.cpp | 207 |
1 files changed, 83 insertions, 124 deletions
diff --git a/contrib/llvm/lib/CodeGen/MachineModuleInfo.cpp b/contrib/llvm/lib/CodeGen/MachineModuleInfo.cpp index baad411..42d0603 100644 --- a/contrib/llvm/lib/CodeGen/MachineModuleInfo.cpp +++ b/contrib/llvm/lib/CodeGen/MachineModuleInfo.cpp @@ -9,10 +9,12 @@ #include "llvm/CodeGen/MachineModuleInfo.h" #include "llvm/ADT/PointerUnion.h" +#include "llvm/Analysis/LibCallSemantics.h" #include "llvm/Analysis/ValueTracking.h" #include "llvm/CodeGen/MachineFunction.h" #include "llvm/CodeGen/MachineFunctionPass.h" #include "llvm/CodeGen/Passes.h" +#include "llvm/CodeGen/WinEHFuncInfo.h" #include "llvm/IR/Constants.h" #include "llvm/IR/DerivedTypes.h" #include "llvm/IR/GlobalVariable.h" @@ -52,9 +54,8 @@ public: class MMIAddrLabelMap { MCContext &Context; struct AddrLabelSymEntry { - /// Symbols - The symbols for the label. This is a pointer union that is - /// either one symbol (the common case) or a list of symbols. - PointerUnion<MCSymbol *, std::vector<MCSymbol*>*> Symbols; + /// Symbols - The symbols for the label. + TinyPtrVector<MCSymbol *> Symbols; Function *Fn; // The containing function of the BasicBlock. unsigned Index; // The index in BBCallbacks for the BasicBlock. @@ -78,16 +79,9 @@ public: ~MMIAddrLabelMap() { assert(DeletedAddrLabelsNeedingEmission.empty() && "Some labels for deleted blocks never got emitted"); - - // Deallocate any of the 'list of symbols' case. - for (DenseMap<AssertingVH<BasicBlock>, AddrLabelSymEntry>::iterator - I = AddrLabelSymbols.begin(), E = AddrLabelSymbols.end(); I != E; ++I) - if (I->second.Symbols.is<std::vector<MCSymbol*>*>()) - delete I->second.Symbols.get<std::vector<MCSymbol*>*>(); } - MCSymbol *getAddrLabelSymbol(BasicBlock *BB); - std::vector<MCSymbol*> getAddrLabelSymbolToEmit(BasicBlock *BB); + ArrayRef<MCSymbol *> getAddrLabelSymbolToEmit(BasicBlock *BB); void takeDeletedSymbolsForFunction(Function *F, std::vector<MCSymbol*> &Result); @@ -97,49 +91,27 @@ public: }; } -MCSymbol *MMIAddrLabelMap::getAddrLabelSymbol(BasicBlock *BB) { +ArrayRef<MCSymbol *> MMIAddrLabelMap::getAddrLabelSymbolToEmit(BasicBlock *BB) { assert(BB->hasAddressTaken() && "Shouldn't get label for block without address taken"); AddrLabelSymEntry &Entry = AddrLabelSymbols[BB]; // If we already had an entry for this block, just return it. - if (!Entry.Symbols.isNull()) { + if (!Entry.Symbols.empty()) { assert(BB->getParent() == Entry.Fn && "Parent changed"); - if (Entry.Symbols.is<MCSymbol*>()) - return Entry.Symbols.get<MCSymbol*>(); - return (*Entry.Symbols.get<std::vector<MCSymbol*>*>())[0]; + return Entry.Symbols; } // Otherwise, this is a new entry, create a new symbol for it and add an // entry to BBCallbacks so we can be notified if the BB is deleted or RAUWd. - BBCallbacks.push_back(BB); + BBCallbacks.emplace_back(BB); BBCallbacks.back().setMap(this); - Entry.Index = BBCallbacks.size()-1; + Entry.Index = BBCallbacks.size() - 1; Entry.Fn = BB->getParent(); - MCSymbol *Result = Context.CreateTempSymbol(); - Entry.Symbols = Result; - return Result; -} - -std::vector<MCSymbol*> -MMIAddrLabelMap::getAddrLabelSymbolToEmit(BasicBlock *BB) { - assert(BB->hasAddressTaken() && - "Shouldn't get label for block without address taken"); - AddrLabelSymEntry &Entry = AddrLabelSymbols[BB]; - - std::vector<MCSymbol*> Result; - - // If we already had an entry for this block, just return it. - if (Entry.Symbols.isNull()) - Result.push_back(getAddrLabelSymbol(BB)); - else if (MCSymbol *Sym = Entry.Symbols.dyn_cast<MCSymbol*>()) - Result.push_back(Sym); - else - Result = *Entry.Symbols.get<std::vector<MCSymbol*>*>(); - return Result; + Entry.Symbols.push_back(Context.createTempSymbol()); + return Entry.Symbols; } - /// takeDeletedSymbolsForFunction - If we have any deleted symbols for F, return /// them. void MMIAddrLabelMap:: @@ -160,16 +132,15 @@ void MMIAddrLabelMap::UpdateForDeletedBlock(BasicBlock *BB) { // If the block got deleted, there is no need for the symbol. If the symbol // was already emitted, we can just forget about it, otherwise we need to // queue it up for later emission when the function is output. - AddrLabelSymEntry Entry = AddrLabelSymbols[BB]; + AddrLabelSymEntry Entry = std::move(AddrLabelSymbols[BB]); AddrLabelSymbols.erase(BB); - assert(!Entry.Symbols.isNull() && "Didn't have a symbol, why a callback?"); + assert(!Entry.Symbols.empty() && "Didn't have a symbol, why a callback?"); BBCallbacks[Entry.Index] = nullptr; // Clear the callback. assert((BB->getParent() == nullptr || BB->getParent() == Entry.Fn) && "Block/parent mismatch"); - // Handle both the single and the multiple symbols cases. - if (MCSymbol *Sym = Entry.Symbols.dyn_cast<MCSymbol*>()) { + for (MCSymbol *Sym : Entry.Symbols) { if (Sym->isDefined()) return; @@ -178,64 +149,29 @@ void MMIAddrLabelMap::UpdateForDeletedBlock(BasicBlock *BB) { // for the containing Function. Since the block is being deleted, its // parent may already be removed, we have to get the function from 'Entry'. DeletedAddrLabelsNeedingEmission[Entry.Fn].push_back(Sym); - } else { - std::vector<MCSymbol*> *Syms = Entry.Symbols.get<std::vector<MCSymbol*>*>(); - - for (unsigned i = 0, e = Syms->size(); i != e; ++i) { - MCSymbol *Sym = (*Syms)[i]; - if (Sym->isDefined()) continue; // Ignore already emitted labels. - - // If the block is not yet defined, we need to emit it at the end of the - // function. Add the symbol to the DeletedAddrLabelsNeedingEmission list - // for the containing Function. Since the block is being deleted, its - // parent may already be removed, we have to get the function from - // 'Entry'. - DeletedAddrLabelsNeedingEmission[Entry.Fn].push_back(Sym); - } - - // The entry is deleted, free the memory associated with the symbol list. - delete Syms; } } void MMIAddrLabelMap::UpdateForRAUWBlock(BasicBlock *Old, BasicBlock *New) { // Get the entry for the RAUW'd block and remove it from our map. - AddrLabelSymEntry OldEntry = AddrLabelSymbols[Old]; + AddrLabelSymEntry OldEntry = std::move(AddrLabelSymbols[Old]); AddrLabelSymbols.erase(Old); - assert(!OldEntry.Symbols.isNull() && "Didn't have a symbol, why a callback?"); + assert(!OldEntry.Symbols.empty() && "Didn't have a symbol, why a callback?"); AddrLabelSymEntry &NewEntry = AddrLabelSymbols[New]; // If New is not address taken, just move our symbol over to it. - if (NewEntry.Symbols.isNull()) { + if (NewEntry.Symbols.empty()) { BBCallbacks[OldEntry.Index].setPtr(New); // Update the callback. - NewEntry = OldEntry; // Set New's entry. + NewEntry = std::move(OldEntry); // Set New's entry. return; } BBCallbacks[OldEntry.Index] = nullptr; // Update the callback. - // Otherwise, we need to add the old symbol to the new block's set. If it is - // just a single entry, upgrade it to a symbol list. - if (MCSymbol *PrevSym = NewEntry.Symbols.dyn_cast<MCSymbol*>()) { - std::vector<MCSymbol*> *SymList = new std::vector<MCSymbol*>(); - SymList->push_back(PrevSym); - NewEntry.Symbols = SymList; - } - - std::vector<MCSymbol*> *SymList = - NewEntry.Symbols.get<std::vector<MCSymbol*>*>(); - - // If the old entry was a single symbol, add it. - if (MCSymbol *Sym = OldEntry.Symbols.dyn_cast<MCSymbol*>()) { - SymList->push_back(Sym); - return; - } - - // Otherwise, concatenate the list. - std::vector<MCSymbol*> *Syms =OldEntry.Symbols.get<std::vector<MCSymbol*>*>(); - SymList->insert(SymList->end(), Syms->begin(), Syms->end()); - delete Syms; + // Otherwise, we need to add the old symbols to the new block's set. + NewEntry.Symbols.insert(NewEntry.Symbols.end(), OldEntry.Symbols.begin(), + OldEntry.Symbols.end()); } @@ -271,11 +207,12 @@ bool MachineModuleInfo::doInitialization(Module &M) { ObjFileMMI = nullptr; CurCallSite = 0; - CallsEHReturn = 0; - CallsUnwindInit = 0; + CallsEHReturn = false; + CallsUnwindInit = false; DbgInfoAvailable = UsesVAFloatArgument = UsesMorestackAddr = false; // Always emit some info, by default "no personality" info. Personalities.push_back(nullptr); + PersonalityTypeCache = EHPersonality::Unknown; AddrLabelSymbols = nullptr; TheModule = nullptr; @@ -305,50 +242,23 @@ void MachineModuleInfo::EndFunction() { // Clean up exception info. LandingPads.clear(); + PersonalityTypeCache = EHPersonality::Unknown; CallSiteMap.clear(); TypeInfos.clear(); FilterIds.clear(); FilterEnds.clear(); - CallsEHReturn = 0; - CallsUnwindInit = 0; + CallsEHReturn = false; + CallsUnwindInit = false; VariableDbgInfos.clear(); } -/// AnalyzeModule - Scan the module for global debug information. -/// -void MachineModuleInfo::AnalyzeModule(const Module &M) { - // Insert functions in the llvm.used array (but not llvm.compiler.used) into - // UsedFunctions. - const GlobalVariable *GV = M.getGlobalVariable("llvm.used"); - if (!GV || !GV->hasInitializer()) return; - - // Should be an array of 'i8*'. - const ConstantArray *InitList = cast<ConstantArray>(GV->getInitializer()); - - for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i) - if (const Function *F = - dyn_cast<Function>(InitList->getOperand(i)->stripPointerCasts())) - UsedFunctions.insert(F); -} - //===- Address of Block Management ----------------------------------------===// - -/// getAddrLabelSymbol - Return the symbol to be used for the specified basic -/// block when its address is taken. This cannot be its normal LBB label -/// because the block may be accessed outside its containing function. -MCSymbol *MachineModuleInfo::getAddrLabelSymbol(const BasicBlock *BB) { - // Lazily create AddrLabelSymbols. - if (!AddrLabelSymbols) - AddrLabelSymbols = new MMIAddrLabelMap(Context); - return AddrLabelSymbols->getAddrLabelSymbol(const_cast<BasicBlock*>(BB)); -} - /// getAddrLabelSymbolToEmit - Return the symbol to be used for the specified /// basic block when its address is taken. If other blocks were RAUW'd to /// this one, we may have to emit them as well, return the whole set. -std::vector<MCSymbol*> MachineModuleInfo:: -getAddrLabelSymbolToEmit(const BasicBlock *BB) { +ArrayRef<MCSymbol *> +MachineModuleInfo::getAddrLabelSymbolToEmit(const BasicBlock *BB) { // Lazily create AddrLabelSymbols. if (!AddrLabelSymbols) AddrLabelSymbols = new MMIAddrLabelMap(Context); @@ -398,7 +308,7 @@ void MachineModuleInfo::addInvoke(MachineBasicBlock *LandingPad, /// addLandingPad - Provide the label of a try LandingPad block. /// MCSymbol *MachineModuleInfo::addLandingPad(MachineBasicBlock *LandingPad) { - MCSymbol *LandingPadLabel = Context.CreateTempSymbol(); + MCSymbol *LandingPadLabel = Context.createTempSymbol(); LandingPadInfo &LP = getOrCreateLandingPadInfo(LandingPad); LP.LandingPadLabel = LandingPadLabel; return LandingPadLabel; @@ -423,6 +333,12 @@ void MachineModuleInfo::addPersonality(MachineBasicBlock *LandingPad, Personalities.push_back(Personality); } +void MachineModuleInfo::addWinEHState(MachineBasicBlock *LandingPad, + int State) { + LandingPadInfo &LP = getOrCreateLandingPadInfo(LandingPad); + LP.WinEHState = State; +} + /// addCatchTypeInfo - Provide the catch typeinfo for a landing pad. /// void MachineModuleInfo:: @@ -452,6 +368,25 @@ void MachineModuleInfo::addCleanup(MachineBasicBlock *LandingPad) { LP.TypeIds.push_back(0); } +void MachineModuleInfo::addSEHCatchHandler(MachineBasicBlock *LandingPad, + const Function *Filter, + const BlockAddress *RecoverBA) { + LandingPadInfo &LP = getOrCreateLandingPadInfo(LandingPad); + SEHHandler Handler; + Handler.FilterOrFinally = Filter; + Handler.RecoverBA = RecoverBA; + LP.SEHHandlers.push_back(Handler); +} + +void MachineModuleInfo::addSEHCleanupHandler(MachineBasicBlock *LandingPad, + const Function *Cleanup) { + LandingPadInfo &LP = getOrCreateLandingPadInfo(LandingPad); + SEHHandler Handler; + Handler.FilterOrFinally = Cleanup; + Handler.RecoverBA = nullptr; + LP.SEHHandlers.push_back(Handler); +} + /// TidyLandingPads - Remap landing pad labels and remove any deleted landing /// pads. void MachineModuleInfo::TidyLandingPads(DenseMap<MCSymbol*, uintptr_t> *LPMap) { @@ -546,9 +481,18 @@ try_next:; /// getPersonality - Return the personality function for the current function. const Function *MachineModuleInfo::getPersonality() const { - // FIXME: Until PR1414 will be fixed, we're using 1 personality function per - // function - return !LandingPads.empty() ? LandingPads[0].Personality : nullptr; + for (const LandingPadInfo &LPI : LandingPads) + if (LPI.Personality) + return LPI.Personality; + return nullptr; +} + +EHPersonality MachineModuleInfo::getPersonalityType() { + if (PersonalityTypeCache == EHPersonality::Unknown) { + if (const Function *F = getPersonality()) + PersonalityTypeCache = classifyEHPersonality(F); + } + return PersonalityTypeCache; } /// getPersonalityIndex - Return unique index for current personality @@ -572,3 +516,18 @@ unsigned MachineModuleInfo::getPersonalityIndex() const { // in the zero index. return 0; } + +const Function *MachineModuleInfo::getWinEHParent(const Function *F) const { + StringRef WinEHParentName = + F->getFnAttribute("wineh-parent").getValueAsString(); + if (WinEHParentName.empty() || WinEHParentName == F->getName()) + return F; + return F->getParent()->getFunction(WinEHParentName); +} + +WinEHFuncInfo &MachineModuleInfo::getWinEHFuncInfo(const Function *F) { + auto &Ptr = FuncInfoMap[getWinEHParent(F)]; + if (!Ptr) + Ptr.reset(new WinEHFuncInfo); + return *Ptr; +} |
