//===----------------------------------------------------------------------===//
#include "llvm/CodeGen/MachineModuleInfo.h"
-
-#include "llvm/Constants.h"
-#include "llvm/DerivedTypes.h"
-#include "llvm/GlobalVariable.h"
-#include "llvm/Intrinsics.h"
-#include "llvm/Instructions.h"
-#include "llvm/Module.h"
+#include "llvm/ADT/PointerUnion.h"
+#include "llvm/ADT/TinyPtrVector.h"
+#include "llvm/Analysis/EHPersonalities.h"
#include "llvm/Analysis/ValueTracking.h"
-#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineFunction.h"
+#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/Passes.h"
-#include "llvm/Target/TargetInstrInfo.h"
-#include "llvm/Target/TargetMachine.h"
-#include "llvm/Target/TargetOptions.h"
+#include "llvm/IR/Constants.h"
+#include "llvm/IR/DerivedTypes.h"
+#include "llvm/IR/GlobalVariable.h"
+#include "llvm/IR/Module.h"
+#include "llvm/MC/MCObjectFileInfo.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/Support/Dwarf.h"
#include "llvm/Support/ErrorHandling.h"
using namespace llvm;
using namespace llvm::dwarf;
-// Handle the Pass registration stuff necessary to use TargetData's.
-static RegisterPass<MachineModuleInfo>
-X("machinemoduleinfo", "Machine Module Information");
+// Handle the Pass registration stuff necessary to use DataLayout's.
+INITIALIZE_PASS(MachineModuleInfo, "machinemoduleinfo",
+ "Machine Module Information", false, false)
char MachineModuleInfo::ID = 0;
// Out of line virtual method.
MachineModuleInfoImpl::~MachineModuleInfoImpl() {}
+namespace llvm {
+class MMIAddrLabelMapCallbackPtr final : CallbackVH {
+ MMIAddrLabelMap *Map;
+public:
+ MMIAddrLabelMapCallbackPtr() : Map(nullptr) {}
+ MMIAddrLabelMapCallbackPtr(Value *V) : CallbackVH(V), Map(nullptr) {}
+
+ void setPtr(BasicBlock *BB) {
+ ValueHandleBase::operator=(BB);
+ }
+
+ void setMap(MMIAddrLabelMap *map) { Map = map; }
+
+ void deleted() override;
+ void allUsesReplacedWith(Value *V2) override;
+};
+
+class MMIAddrLabelMap {
+ MCContext &Context;
+ struct AddrLabelSymEntry {
+ /// 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.
+ };
+
+ DenseMap<AssertingVH<BasicBlock>, AddrLabelSymEntry> AddrLabelSymbols;
+
+ /// BBCallbacks - Callbacks for the BasicBlock's that we have entries for. We
+ /// use this so we get notified if a block is deleted or RAUWd.
+ std::vector<MMIAddrLabelMapCallbackPtr> BBCallbacks;
+
+ /// DeletedAddrLabelsNeedingEmission - This is a per-function list of symbols
+ /// whose corresponding BasicBlock got deleted. These symbols need to be
+ /// emitted at some point in the file, so AsmPrinter emits them after the
+ /// function body.
+ DenseMap<AssertingVH<Function>, std::vector<MCSymbol*> >
+ DeletedAddrLabelsNeedingEmission;
+public:
+
+ MMIAddrLabelMap(MCContext &context) : Context(context) {}
+ ~MMIAddrLabelMap() {
+ assert(DeletedAddrLabelsNeedingEmission.empty() &&
+ "Some labels for deleted blocks never got emitted");
+ }
+
+ ArrayRef<MCSymbol *> getAddrLabelSymbolToEmit(BasicBlock *BB);
+
+ void takeDeletedSymbolsForFunction(Function *F,
+ std::vector<MCSymbol*> &Result);
+
+ void UpdateForDeletedBlock(BasicBlock *BB);
+ void UpdateForRAUWBlock(BasicBlock *Old, BasicBlock *New);
+};
+}
+
+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.empty()) {
+ assert(BB->getParent() == Entry.Fn && "Parent changed");
+ 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.emplace_back(BB);
+ BBCallbacks.back().setMap(this);
+ Entry.Index = BBCallbacks.size() - 1;
+ Entry.Fn = BB->getParent();
+ Entry.Symbols.push_back(Context.createTempSymbol());
+ return Entry.Symbols;
+}
+
+/// takeDeletedSymbolsForFunction - If we have any deleted symbols for F, return
+/// them.
+void MMIAddrLabelMap::
+takeDeletedSymbolsForFunction(Function *F, std::vector<MCSymbol*> &Result) {
+ DenseMap<AssertingVH<Function>, std::vector<MCSymbol*> >::iterator I =
+ DeletedAddrLabelsNeedingEmission.find(F);
+
+ // If there are no entries for the function, just return.
+ if (I == DeletedAddrLabelsNeedingEmission.end()) return;
+
+ // Otherwise, take the list.
+ std::swap(Result, I->second);
+ DeletedAddrLabelsNeedingEmission.erase(I);
+}
+
+
+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 = std::move(AddrLabelSymbols[BB]);
+ AddrLabelSymbols.erase(BB);
+ 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");
+
+ for (MCSymbol *Sym : Entry.Symbols) {
+ if (Sym->isDefined())
+ return;
+
+ // 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);
+ }
+}
+
+void MMIAddrLabelMap::UpdateForRAUWBlock(BasicBlock *Old, BasicBlock *New) {
+ // Get the entry for the RAUW'd block and remove it from our map.
+ AddrLabelSymEntry OldEntry = std::move(AddrLabelSymbols[Old]);
+ AddrLabelSymbols.erase(Old);
+ 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.empty()) {
+ BBCallbacks[OldEntry.Index].setPtr(New); // Update the callback.
+ NewEntry = std::move(OldEntry); // Set New's entry.
+ return;
+ }
+
+ BBCallbacks[OldEntry.Index] = nullptr; // Update the callback.
+
+ // 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());
+}
+
+
+void MMIAddrLabelMapCallbackPtr::deleted() {
+ Map->UpdateForDeletedBlock(cast<BasicBlock>(getValPtr()));
+}
+
+void MMIAddrLabelMapCallbackPtr::allUsesReplacedWith(Value *V2) {
+ Map->UpdateForRAUWBlock(cast<BasicBlock>(getValPtr()), cast<BasicBlock>(V2));
+}
+
+
//===----------------------------------------------------------------------===//
-MachineModuleInfo::MachineModuleInfo(const MCAsmInfo &MAI)
-: ImmutablePass(&ID), Context(MAI),
- ObjFileMMI(0),
- CurCallSite(0), CallsEHReturn(0), CallsUnwindInit(0), DbgInfoAvailable(false){
- // Always emit some info, by default "no personality" info.
- Personalities.push_back(NULL);
+MachineModuleInfo::MachineModuleInfo(const MCAsmInfo &MAI,
+ const MCRegisterInfo &MRI,
+ const MCObjectFileInfo *MOFI)
+ : ImmutablePass(ID), Context(&MAI, &MRI, MOFI, nullptr, false) {
+ initializeMachineModuleInfoPass(*PassRegistry::getPassRegistry());
}
MachineModuleInfo::MachineModuleInfo()
-: ImmutablePass(&ID), Context(*(MCAsmInfo*)0) {
- assert(0 && "This MachineModuleInfo constructor should never be called, MMI "
- "should always be explicitly constructed by LLVMTargetMachine");
- abort();
+ : ImmutablePass(ID), Context(nullptr, nullptr, nullptr) {
+ llvm_unreachable("This MachineModuleInfo constructor should never be called, "
+ "MMI should always be explicitly constructed by "
+ "LLVMTargetMachine");
}
MachineModuleInfo::~MachineModuleInfo() {
- delete ObjFileMMI;
}
-/// doInitialization - Initialize the state for a new module.
-///
-bool MachineModuleInfo::doInitialization() {
+bool MachineModuleInfo::doInitialization(Module &M) {
+
+ ObjFileMMI = nullptr;
+ CurCallSite = 0;
+ CallsEHReturn = false;
+ CallsUnwindInit = false;
+ HasEHFunclets = false;
+ DbgInfoAvailable = UsesVAFloatArgument = UsesMorestackAddr = false;
+ PersonalityTypeCache = EHPersonality::Unknown;
+ AddrLabelSymbols = nullptr;
+ TheModule = nullptr;
+
return false;
}
-/// doFinalization - Tear down the state after completion of a module.
-///
-bool MachineModuleInfo::doFinalization() {
+bool MachineModuleInfo::doFinalization(Module &M) {
+
+ Personalities.clear();
+
+ delete AddrLabelSymbols;
+ AddrLabelSymbols = nullptr;
+
+ Context.reset();
+
+ delete ObjFileMMI;
+ ObjFileMMI = nullptr;
+
return false;
}
///
void MachineModuleInfo::EndFunction() {
// Clean up frame info.
- FrameMoves.clear();
+ FrameInstructions.clear();
// Clean up exception info.
LandingPads.clear();
+ PersonalityTypeCache = EHPersonality::Unknown;
CallSiteMap.clear();
TypeInfos.clear();
FilterIds.clear();
FilterEnds.clear();
- CallsEHReturn = 0;
- CallsUnwindInit = 0;
- VariableDbgInfo.clear();
+ CallsEHReturn = false;
+ CallsUnwindInit = false;
+ HasEHFunclets = false;
+ VariableDbgInfos.clear();
}
-/// AnalyzeModule - Scan the module for global debug information.
-///
-void MachineModuleInfo::AnalyzeModule(Module &M) {
- // Insert functions in the llvm.used array (but not llvm.compiler.used) into
- // UsedFunctions.
- GlobalVariable *GV = M.getGlobalVariable("llvm.used");
- if (!GV || !GV->hasInitializer()) return;
-
- // Should be an array of 'i8*'.
- ConstantArray *InitList = dyn_cast<ConstantArray>(GV->getInitializer());
- if (InitList == 0) return;
-
- for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i)
- if (Function *F =
- dyn_cast<Function>(InitList->getOperand(i)->stripPointerCasts()))
- UsedFunctions.insert(F);
+//===- Address of Block Management ----------------------------------------===//
+
+/// 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.
+ArrayRef<MCSymbol *>
+MachineModuleInfo::getAddrLabelSymbolToEmit(const BasicBlock *BB) {
+ // Lazily create AddrLabelSymbols.
+ if (!AddrLabelSymbols)
+ AddrLabelSymbols = new MMIAddrLabelMap(Context);
+ return AddrLabelSymbols->getAddrLabelSymbolToEmit(const_cast<BasicBlock*>(BB));
}
-/// 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) {
- assert(BB->hasAddressTaken() &&
- "Shouldn't get label for block without address taken");
- MCSymbol *&Entry = AddrLabelSymbols[const_cast<BasicBlock*>(BB)];
- if (Entry) return Entry;
- return Entry = Context.CreateTempSymbol();
-}
+/// takeDeletedSymbolsForFunction - If the specified function has had any
+/// references to address-taken blocks generated, but the block got deleted,
+/// return the symbol now so we can emit it. This prevents emitting a
+/// reference to a symbol that has no definition.
+void MachineModuleInfo::
+takeDeletedSymbolsForFunction(const Function *F,
+ std::vector<MCSymbol*> &Result) {
+ // If no blocks have had their addresses taken, we're done.
+ if (!AddrLabelSymbols) return;
+ return AddrLabelSymbols->
+ takeDeletedSymbolsForFunction(const_cast<Function*>(F), Result);
+}
-//===-EH-------------------------------------------------------------------===//
+//===- EH -----------------------------------------------------------------===//
/// getOrCreateLandingPadInfo - Find or create an LandingPadInfo for the
/// specified MachineBasicBlock.
/// 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;
}
-/// addPersonality - Provide the personality function for the exception
-/// information.
-void MachineModuleInfo::addPersonality(MachineBasicBlock *LandingPad,
- Function *Personality) {
- LandingPadInfo &LP = getOrCreateLandingPadInfo(LandingPad);
- LP.Personality = Personality;
-
+void MachineModuleInfo::addPersonality(const Function *Personality) {
for (unsigned i = 0; i < Personalities.size(); ++i)
if (Personalities[i] == Personality)
return;
-
- // If this is the first personality we're adding go
- // ahead and add it at the beginning.
- if (Personalities[0] == NULL)
- Personalities[0] = Personality;
- else
- Personalities.push_back(Personality);
+ Personalities.push_back(Personality);
}
/// addCatchTypeInfo - Provide the catch typeinfo for a landing pad.
///
-void MachineModuleInfo::addCatchTypeInfo(MachineBasicBlock *LandingPad,
- std::vector<GlobalVariable *> &TyInfo) {
+void MachineModuleInfo::
+addCatchTypeInfo(MachineBasicBlock *LandingPad,
+ ArrayRef<const GlobalValue *> TyInfo) {
LandingPadInfo &LP = getOrCreateLandingPadInfo(LandingPad);
for (unsigned N = TyInfo.size(); N; --N)
LP.TypeIds.push_back(getTypeIDFor(TyInfo[N - 1]));
/// addFilterTypeInfo - Provide the filter typeinfo for a landing pad.
///
-void MachineModuleInfo::addFilterTypeInfo(MachineBasicBlock *LandingPad,
- std::vector<GlobalVariable *> &TyInfo) {
+void MachineModuleInfo::
+addFilterTypeInfo(MachineBasicBlock *LandingPad,
+ ArrayRef<const GlobalValue *> TyInfo) {
LandingPadInfo &LP = getOrCreateLandingPadInfo(LandingPad);
std::vector<unsigned> IdsInFilter(TyInfo.size());
for (unsigned I = 0, E = TyInfo.size(); I != E; ++I)
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() {
+void MachineModuleInfo::TidyLandingPads(DenseMap<MCSymbol*, uintptr_t> *LPMap) {
for (unsigned i = 0; i != LandingPads.size(); ) {
LandingPadInfo &LandingPad = LandingPads[i];
- if (LandingPad.LandingPadLabel && !LandingPad.LandingPadLabel->isDefined())
- LandingPad.LandingPadLabel = 0;
+ if (LandingPad.LandingPadLabel &&
+ !LandingPad.LandingPadLabel->isDefined() &&
+ (!LPMap || (*LPMap)[LandingPad.LandingPadLabel] == 0))
+ LandingPad.LandingPadLabel = nullptr;
// Special case: we *should* emit LPs with null LP MBB. This indicates
// "nounwind" case.
for (unsigned j = 0, e = LandingPads[i].BeginLabels.size(); j != e; ++j) {
MCSymbol *BeginLabel = LandingPad.BeginLabels[j];
MCSymbol *EndLabel = LandingPad.EndLabels[j];
- if (BeginLabel->isDefined() && EndLabel->isDefined()) continue;
-
+ if ((BeginLabel->isDefined() ||
+ (LPMap && (*LPMap)[BeginLabel] != 0)) &&
+ (EndLabel->isDefined() ||
+ (LPMap && (*LPMap)[EndLabel] != 0))) continue;
+
LandingPad.BeginLabels.erase(LandingPad.BeginLabels.begin() + j);
LandingPad.EndLabels.erase(LandingPad.EndLabels.begin() + j);
--j, --e;
}
}
+/// setCallSiteLandingPad - Map the landing pad's EH symbol to the call site
+/// indexes.
+void MachineModuleInfo::setCallSiteLandingPad(MCSymbol *Sym,
+ ArrayRef<unsigned> Sites) {
+ LPadToCallSiteMap[Sym].append(Sites.begin(), Sites.end());
+}
+
/// getTypeIDFor - Return the type id for the specified typeinfo. This is
/// function wide.
-unsigned MachineModuleInfo::getTypeIDFor(GlobalVariable *TI) {
+unsigned MachineModuleInfo::getTypeIDFor(const GlobalValue *TI) {
for (unsigned i = 0, N = TypeInfos.size(); i != N; ++i)
if (TypeInfos[i] == TI) return i + 1;
// Add the new filter.
int FilterID = -(1 + FilterIds.size());
FilterIds.reserve(FilterIds.size() + TyIds.size() + 1);
- for (unsigned I = 0, N = TyIds.size(); I != N; ++I)
- FilterIds.push_back(TyIds[I]);
+ FilterIds.insert(FilterIds.end(), TyIds.begin(), TyIds.end());
FilterEnds.push_back(FilterIds.size());
FilterIds.push_back(0); // terminator
return FilterID;
}
-
-/// getPersonality - Return the personality function for the current function.
-Function *MachineModuleInfo::getPersonality() const {
- // FIXME: Until PR1414 will be fixed, we're using 1 personality function per
- // function
- return !LandingPads.empty() ? LandingPads[0].Personality : NULL;
-}
-
-/// getPersonalityIndex - Return unique index for current personality
-/// function. NULL/first personality function should always get zero index.
-unsigned MachineModuleInfo::getPersonalityIndex() const {
- const Function* Personality = NULL;
-
- // Scan landing pads. If there is at least one non-NULL personality - use it.
- for (unsigned i = 0; i != LandingPads.size(); ++i)
- if (LandingPads[i].Personality) {
- Personality = LandingPads[i].Personality;
- break;
- }
-
- for (unsigned i = 0; i < Personalities.size(); ++i) {
- if (Personalities[i] == Personality)
- return i;
- }
-
- // This will happen if the current personality function is
- // in the zero index.
- return 0;
-}
-
projects / oota-llvm.git / blobdiff