#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/ADT/PointerUnion.h"
-#include "llvm/Analysis/LibCallSemantics.h"
+#include "llvm/ADT/TinyPtrVector.h"
+#include "llvm/Analysis/EHPersonalities.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"
MachineModuleInfoImpl::~MachineModuleInfoImpl() {}
namespace llvm {
-class MMIAddrLabelMapCallbackPtr : CallbackVH {
+class MMIAddrLabelMapCallbackPtr final : CallbackVH {
MMIAddrLabelMap *Map;
public:
MMIAddrLabelMapCallbackPtr() : Map(nullptr) {}
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.
~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);
};
}
-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::
// 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;
// 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());
}
ObjFileMMI = nullptr;
CurCallSite = 0;
- CallsEHReturn = 0;
- CallsUnwindInit = 0;
+ CallsEHReturn = false;
+ CallsUnwindInit = false;
+ HasEHFunclets = 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;
// 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;
+ HasEHFunclets = 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);
/// 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,
- const 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])
- Personalities[0] = Personality;
- else
- Personalities.push_back(Personality);
-}
-
-void MachineModuleInfo::addWinEHState(MachineBasicBlock *LandingPad,
- int State) {
- LandingPadInfo &LP = getOrCreateLandingPadInfo(LandingPad);
- LP.WinEHState = State;
+ Personalities.push_back(Personality);
}
/// addCatchTypeInfo - Provide the catch typeinfo for a landing pad.
LP.TypeIds.push_back(0);
}
-MCSymbol *
-MachineModuleInfo::addClauseForLandingPad(MachineBasicBlock *LandingPad) {
- MCSymbol *ClauseLabel = Context.CreateTempSymbol();
- LandingPadInfo &LP = getOrCreateLandingPadInfo(LandingPad);
- LP.ClauseLabels.push_back(ClauseLabel);
- return ClauseLabel;
-}
-
void MachineModuleInfo::addSEHCatchHandler(MachineBasicBlock *LandingPad,
const Function *Filter,
const BlockAddress *RecoverBA) {
FilterIds.push_back(0); // terminator
return FilterID;
}
-
-/// getPersonality - Return the personality function for the current function.
-const Function *MachineModuleInfo::getPersonality() const {
- 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
-/// function. NULL/first personality function should always get zero index.
-unsigned MachineModuleInfo::getPersonalityIndex() const {
- const Function* Personality = nullptr;
-
- // Scan landing pads. If there is at least one non-NULL personality - use it.
- for (unsigned i = 0, e = LandingPads.size(); i != e; ++i)
- if (LandingPads[i].Personality) {
- Personality = LandingPads[i].Personality;
- break;
- }
-
- for (unsigned i = 0, e = Personalities.size(); i < e; ++i) {
- if (Personalities[i] == Personality)
- return i;
- }
-
- // This will happen if the current personality function is
- // 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;
-}
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