mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-31 12:30:06 +00:00
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171475 91177308-0d34-0410-b5e6-96231b3b80d8
579 lines
20 KiB
C++
579 lines
20 KiB
C++
//===-- llvm/CodeGen/MachineModuleInfo.cpp ----------------------*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/CodeGen/MachineModuleInfo.h"
|
|
#include "llvm/ADT/PointerUnion.h"
|
|
#include "llvm/Analysis/ValueTracking.h"
|
|
#include "llvm/CodeGen/MachineFunction.h"
|
|
#include "llvm/CodeGen/MachineFunctionPass.h"
|
|
#include "llvm/CodeGen/Passes.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 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 : CallbackVH {
|
|
MMIAddrLabelMap *Map;
|
|
public:
|
|
MMIAddrLabelMapCallbackPtr() : Map(0) {}
|
|
MMIAddrLabelMapCallbackPtr(Value *V) : CallbackVH(V), Map(0) {}
|
|
|
|
void setPtr(BasicBlock *BB) {
|
|
ValueHandleBase::operator=(BB);
|
|
}
|
|
|
|
void setMap(MMIAddrLabelMap *map) { Map = map; }
|
|
|
|
virtual void deleted();
|
|
virtual void allUsesReplacedWith(Value *V2);
|
|
};
|
|
|
|
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;
|
|
|
|
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");
|
|
|
|
// 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);
|
|
|
|
void takeDeletedSymbolsForFunction(Function *F,
|
|
std::vector<MCSymbol*> &Result);
|
|
|
|
void UpdateForDeletedBlock(BasicBlock *BB);
|
|
void UpdateForRAUWBlock(BasicBlock *Old, BasicBlock *New);
|
|
};
|
|
}
|
|
|
|
MCSymbol *MMIAddrLabelMap::getAddrLabelSymbol(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()) {
|
|
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];
|
|
}
|
|
|
|
// 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.back().setMap(this);
|
|
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;
|
|
}
|
|
|
|
|
|
/// 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 = AddrLabelSymbols[BB];
|
|
AddrLabelSymbols.erase(BB);
|
|
assert(!Entry.Symbols.isNull() && "Didn't have a symbol, why a callback?");
|
|
BBCallbacks[Entry.Index] = 0; // Clear the callback.
|
|
|
|
assert((BB->getParent() == 0 || BB->getParent() == Entry.Fn) &&
|
|
"Block/parent mismatch");
|
|
|
|
// Handle both the single and the multiple symbols cases.
|
|
if (MCSymbol *Sym = Entry.Symbols.dyn_cast<MCSymbol*>()) {
|
|
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);
|
|
} 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];
|
|
AddrLabelSymbols.erase(Old);
|
|
assert(!OldEntry.Symbols.isNull() && "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()) {
|
|
BBCallbacks[OldEntry.Index].setPtr(New); // Update the callback.
|
|
NewEntry = OldEntry; // Set New's entry.
|
|
return;
|
|
}
|
|
|
|
BBCallbacks[OldEntry.Index] = 0; // 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;
|
|
}
|
|
|
|
|
|
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,
|
|
const MCRegisterInfo &MRI,
|
|
const MCObjectFileInfo *MOFI)
|
|
: ImmutablePass(ID), Context(MAI, MRI, MOFI, 0, false) {
|
|
initializeMachineModuleInfoPass(*PassRegistry::getPassRegistry());
|
|
}
|
|
|
|
MachineModuleInfo::MachineModuleInfo()
|
|
: ImmutablePass(ID),
|
|
Context(*(MCAsmInfo*)0, *(MCRegisterInfo*)0, (MCObjectFileInfo*)0) {
|
|
llvm_unreachable("This MachineModuleInfo constructor should never be called, "
|
|
"MMI should always be explicitly constructed by "
|
|
"LLVMTargetMachine");
|
|
}
|
|
|
|
MachineModuleInfo::~MachineModuleInfo() {
|
|
}
|
|
|
|
bool MachineModuleInfo::doInitialization(Module &M) {
|
|
|
|
ObjFileMMI = 0;
|
|
CompactUnwindEncoding = 0;
|
|
CurCallSite = 0;
|
|
CallsEHReturn = 0;
|
|
CallsUnwindInit = 0;
|
|
DbgInfoAvailable = UsesVAFloatArgument = false;
|
|
// Always emit some info, by default "no personality" info.
|
|
Personalities.push_back(NULL);
|
|
AddrLabelSymbols = 0;
|
|
TheModule = 0;
|
|
|
|
return false;
|
|
}
|
|
|
|
bool MachineModuleInfo::doFinalization(Module &M) {
|
|
|
|
Personalities.clear();
|
|
|
|
delete AddrLabelSymbols;
|
|
AddrLabelSymbols = 0;
|
|
|
|
Context.reset();
|
|
|
|
delete ObjFileMMI;
|
|
ObjFileMMI = 0;
|
|
|
|
return false;
|
|
}
|
|
|
|
/// EndFunction - Discard function meta information.
|
|
///
|
|
void MachineModuleInfo::EndFunction() {
|
|
// Clean up frame info.
|
|
FrameMoves.clear();
|
|
|
|
// Clean up exception info.
|
|
LandingPads.clear();
|
|
CallSiteMap.clear();
|
|
TypeInfos.clear();
|
|
FilterIds.clear();
|
|
FilterEnds.clear();
|
|
CallsEHReturn = 0;
|
|
CallsUnwindInit = 0;
|
|
CompactUnwindEncoding = 0;
|
|
VariableDbgInfo.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 = dyn_cast<ConstantArray>(GV->getInitializer());
|
|
if (InitList == 0) return;
|
|
|
|
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 == 0)
|
|
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) {
|
|
// Lazily create AddrLabelSymbols.
|
|
if (AddrLabelSymbols == 0)
|
|
AddrLabelSymbols = new MMIAddrLabelMap(Context);
|
|
return AddrLabelSymbols->getAddrLabelSymbolToEmit(const_cast<BasicBlock*>(BB));
|
|
}
|
|
|
|
|
|
/// 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 == 0) return;
|
|
return AddrLabelSymbols->
|
|
takeDeletedSymbolsForFunction(const_cast<Function*>(F), Result);
|
|
}
|
|
|
|
//===- EH -----------------------------------------------------------------===//
|
|
|
|
/// getOrCreateLandingPadInfo - Find or create an LandingPadInfo for the
|
|
/// specified MachineBasicBlock.
|
|
LandingPadInfo &MachineModuleInfo::getOrCreateLandingPadInfo
|
|
(MachineBasicBlock *LandingPad) {
|
|
unsigned N = LandingPads.size();
|
|
for (unsigned i = 0; i < N; ++i) {
|
|
LandingPadInfo &LP = LandingPads[i];
|
|
if (LP.LandingPadBlock == LandingPad)
|
|
return LP;
|
|
}
|
|
|
|
LandingPads.push_back(LandingPadInfo(LandingPad));
|
|
return LandingPads[N];
|
|
}
|
|
|
|
/// addInvoke - Provide the begin and end labels of an invoke style call and
|
|
/// associate it with a try landing pad block.
|
|
void MachineModuleInfo::addInvoke(MachineBasicBlock *LandingPad,
|
|
MCSymbol *BeginLabel, MCSymbol *EndLabel) {
|
|
LandingPadInfo &LP = getOrCreateLandingPadInfo(LandingPad);
|
|
LP.BeginLabels.push_back(BeginLabel);
|
|
LP.EndLabels.push_back(EndLabel);
|
|
}
|
|
|
|
/// addLandingPad - Provide the label of a try LandingPad block.
|
|
///
|
|
MCSymbol *MachineModuleInfo::addLandingPad(MachineBasicBlock *LandingPad) {
|
|
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;
|
|
|
|
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);
|
|
}
|
|
|
|
/// addCatchTypeInfo - Provide the catch typeinfo for a landing pad.
|
|
///
|
|
void MachineModuleInfo::
|
|
addCatchTypeInfo(MachineBasicBlock *LandingPad,
|
|
ArrayRef<const GlobalVariable *> 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,
|
|
ArrayRef<const GlobalVariable *> TyInfo) {
|
|
LandingPadInfo &LP = getOrCreateLandingPadInfo(LandingPad);
|
|
std::vector<unsigned> IdsInFilter(TyInfo.size());
|
|
for (unsigned I = 0, E = TyInfo.size(); I != E; ++I)
|
|
IdsInFilter[I] = getTypeIDFor(TyInfo[I]);
|
|
LP.TypeIds.push_back(getFilterIDFor(IdsInFilter));
|
|
}
|
|
|
|
/// addCleanup - Add a cleanup action for a landing pad.
|
|
///
|
|
void MachineModuleInfo::addCleanup(MachineBasicBlock *LandingPad) {
|
|
LandingPadInfo &LP = getOrCreateLandingPadInfo(LandingPad);
|
|
LP.TypeIds.push_back(0);
|
|
}
|
|
|
|
/// TidyLandingPads - Remap landing pad labels and remove any deleted landing
|
|
/// pads.
|
|
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() &&
|
|
(!LPMap || (*LPMap)[LandingPad.LandingPadLabel] == 0))
|
|
LandingPad.LandingPadLabel = 0;
|
|
|
|
// Special case: we *should* emit LPs with null LP MBB. This indicates
|
|
// "nounwind" case.
|
|
if (!LandingPad.LandingPadLabel && LandingPad.LandingPadBlock) {
|
|
LandingPads.erase(LandingPads.begin() + i);
|
|
continue;
|
|
}
|
|
|
|
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() ||
|
|
(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;
|
|
}
|
|
|
|
// Remove landing pads with no try-ranges.
|
|
if (LandingPads[i].BeginLabels.empty()) {
|
|
LandingPads.erase(LandingPads.begin() + i);
|
|
continue;
|
|
}
|
|
|
|
// If there is no landing pad, ensure that the list of typeids is empty.
|
|
// If the only typeid is a cleanup, this is the same as having no typeids.
|
|
if (!LandingPad.LandingPadBlock ||
|
|
(LandingPad.TypeIds.size() == 1 && !LandingPad.TypeIds[0]))
|
|
LandingPad.TypeIds.clear();
|
|
++i;
|
|
}
|
|
}
|
|
|
|
/// 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(const GlobalVariable *TI) {
|
|
for (unsigned i = 0, N = TypeInfos.size(); i != N; ++i)
|
|
if (TypeInfos[i] == TI) return i + 1;
|
|
|
|
TypeInfos.push_back(TI);
|
|
return TypeInfos.size();
|
|
}
|
|
|
|
/// getFilterIDFor - Return the filter id for the specified typeinfos. This is
|
|
/// function wide.
|
|
int MachineModuleInfo::getFilterIDFor(std::vector<unsigned> &TyIds) {
|
|
// If the new filter coincides with the tail of an existing filter, then
|
|
// re-use the existing filter. Folding filters more than this requires
|
|
// re-ordering filters and/or their elements - probably not worth it.
|
|
for (std::vector<unsigned>::iterator I = FilterEnds.begin(),
|
|
E = FilterEnds.end(); I != E; ++I) {
|
|
unsigned i = *I, j = TyIds.size();
|
|
|
|
while (i && j)
|
|
if (FilterIds[--i] != TyIds[--j])
|
|
goto try_next;
|
|
|
|
if (!j)
|
|
// The new filter coincides with range [i, end) of the existing filter.
|
|
return -(1 + i);
|
|
|
|
try_next:;
|
|
}
|
|
|
|
// Add the new filter.
|
|
int FilterID = -(1 + FilterIds.size());
|
|
FilterIds.reserve(FilterIds.size() + TyIds.size() + 1);
|
|
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.
|
|
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 : 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, 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;
|
|
}
|