void InstrProfiling::lowerCoverageData(GlobalVariable *CoverageData) {
CoverageData->setSection(getCoverageSection());
CoverageData->setAlignment(8);
Constant *Init = CoverageData->getInitializer();
// We're expecting { i32, i32, i32, i32, [n x { i8*, i32, i32 }], [m x i8] }
// for some C. If not, the frontend's given us something broken.
assert(Init->getNumOperands() == 6 && "bad number of fields in coverage map");
assert(isa<ConstantArray>(Init->getAggregateElement(4)) &&
"invalid function list in coverage map");
ConstantArray *Records = cast<ConstantArray>(Init->getAggregateElement(4));
for (unsigned I = 0, E = Records->getNumOperands(); I < E; ++I) {
Constant *Record = Records->getOperand(I);
Value *V = const_cast<Value *>(Record->getOperand(0))->stripPointerCasts();
assert(isa<GlobalVariable>(V) && "Missing reference to function name");
GlobalVariable *Name = cast<GlobalVariable>(V);
// If we have region counters for this name, we've already handled it.
auto It = RegionCounters.find(Name);
if (It != RegionCounters.end())
continue;
// Move the name variable to the right section.
Name->setSection(getNameSection());
Name->setAlignment(1);
}
}
// add to analyze function pointer
bool PathList::extend_calledFunctionMap(Instruction *tmpfi, User *tmpuser, GlobalVariable *func_table, Function *ff)
{
// the first operand of GetElementPtrInst is user of the table
if (tmpfi->getOperand(0) == tmpuser) {
errs()<<"=====find function which calls command_table\n";
// coutn++;
// if the index of the table is a constant int
if (ConstantInt *cint = dyn_cast<ConstantInt>(tmpfi->getOperand(2))) {
// todo: deal with the constantint index
} else {// if the index is a variavle, then add all the funcitons of command_table into the CallGraph
// get the initialization value of the global table
if (Constant *C = func_table->getInitializer()) {
llvm::ConstantArray *ca = dyn_cast<llvm::ConstantArray>(&*C);
if (ca) {
errs()<<"Get ConstantArray ca success.\n";
errs()<<ca->getNumOperands()<<'\n';
// get the element of the global table
for (int cai = 0; cai < ca->getNumOperands(); cai++) {
Constant *tmpca = ca->getOperand(cai);
//tmpca->dump();
ConstantStruct *cs = dyn_cast<ConstantStruct>(&*tmpca);
if (cs) {
//errs()<<"get ConstantStruct cs success.\n";
//errs()<<cs->getNumOperands()<<'\n';
Constant *tmpcs = cs->getOperand(1);
//tmpcs->dump();
//errs() << tmpcs->getNumOperands()<<'\n';
//tmpcs->getType()->dump();
//tmpcs->getOperand(0)->dump();
// get the funciton pointer of the element
if (Function *csfunc = dyn_cast<Function>(&*(tmpcs->getOperand(0)))) {
//errs() << "get function tmpcs success.\n";
// add the current funciton ff to the calledFunctionMap
// as the funciton which calls function csfunc
FunctionMapTy::iterator it2 = calledFunctionMap.find(csfunc);
if(it2==calledFunctionMap.end()) //not find
{
calledFunctionMap[csfunc].push_back(std::make_pair(ff, tmpfi));
}
else {
it2->second.push_back(std::make_pair(ff, tmpfi));
}
}
}
}
} else
return false;
} else {
dbgs() << "Get the initialization value of the global table failed!\n";
return false;
}
}
} else
return false;
return true;
}
Value *llvm::MapValue(const Value *V, ValueToValueMapTy &VM, RemapFlags Flags,
ValueMapTypeRemapper *TypeMapper,
ValueMaterializer *Materializer) {
ValueToValueMapTy::iterator I = VM.find(V);
// If the value already exists in the map, use it.
if (I != VM.end() && I->second) return I->second;
// If we have a materializer and it can materialize a value, use that.
if (Materializer) {
if (Value *NewV = Materializer->materializeValueFor(const_cast<Value*>(V)))
return VM[V] = NewV;
}
// Global values do not need to be seeded into the VM if they
// are using the identity mapping.
if (isa<GlobalValue>(V))
return VM[V] = const_cast<Value*>(V);
if (const InlineAsm *IA = dyn_cast<InlineAsm>(V)) {
// Inline asm may need *type* remapping.
FunctionType *NewTy = IA->getFunctionType();
if (TypeMapper) {
NewTy = cast<FunctionType>(TypeMapper->remapType(NewTy));
if (NewTy != IA->getFunctionType())
V = InlineAsm::get(NewTy, IA->getAsmString(), IA->getConstraintString(),
IA->hasSideEffects(), IA->isAlignStack());
}
return VM[V] = const_cast<Value*>(V);
}
if (const auto *MDV = dyn_cast<MetadataAsValue>(V)) {
const Metadata *MD = MDV->getMetadata();
// If this is a module-level metadata and we know that nothing at the module
// level is changing, then use an identity mapping.
if (!isa<LocalAsMetadata>(MD) && (Flags & RF_NoModuleLevelChanges))
return VM[V] = const_cast<Value *>(V);
auto *MappedMD = MapMetadata(MD, VM, Flags, TypeMapper, Materializer);
if (MD == MappedMD || (!MappedMD && (Flags & RF_IgnoreMissingEntries)))
return VM[V] = const_cast<Value *>(V);
// FIXME: This assert crashes during bootstrap, but I think it should be
// correct. For now, just match behaviour from before the metadata/value
// split.
//
// assert(MappedMD && "Referenced metadata value not in value map");
return VM[V] = MetadataAsValue::get(V->getContext(), MappedMD);
}
// Okay, this either must be a constant (which may or may not be mappable) or
// is something that is not in the mapping table.
Constant *C = const_cast<Constant*>(dyn_cast<Constant>(V));
if (!C)
return nullptr;
if (BlockAddress *BA = dyn_cast<BlockAddress>(C)) {
Function *F =
cast<Function>(MapValue(BA->getFunction(), VM, Flags, TypeMapper, Materializer));
BasicBlock *BB = cast_or_null<BasicBlock>(MapValue(BA->getBasicBlock(), VM,
Flags, TypeMapper, Materializer));
return VM[V] = BlockAddress::get(F, BB ? BB : BA->getBasicBlock());
}
// Otherwise, we have some other constant to remap. Start by checking to see
// if all operands have an identity remapping.
unsigned OpNo = 0, NumOperands = C->getNumOperands();
Value *Mapped = nullptr;
for (; OpNo != NumOperands; ++OpNo) {
Value *Op = C->getOperand(OpNo);
Mapped = MapValue(Op, VM, Flags, TypeMapper, Materializer);
if (Mapped != C) break;
}
// See if the type mapper wants to remap the type as well.
Type *NewTy = C->getType();
if (TypeMapper)
NewTy = TypeMapper->remapType(NewTy);
// If the result type and all operands match up, then just insert an identity
// mapping.
if (OpNo == NumOperands && NewTy == C->getType())
return VM[V] = C;
// Okay, we need to create a new constant. We've already processed some or
// all of the operands, set them all up now.
SmallVector<Constant*, 8> Ops;
Ops.reserve(NumOperands);
for (unsigned j = 0; j != OpNo; ++j)
Ops.push_back(cast<Constant>(C->getOperand(j)));
// If one of the operands mismatch, push it and the other mapped operands.
if (OpNo != NumOperands) {
Ops.push_back(cast<Constant>(Mapped));
// Map the rest of the operands that aren't processed yet.
for (++OpNo; OpNo != NumOperands; ++OpNo)
Ops.push_back(MapValue(cast<Constant>(C->getOperand(OpNo)), VM,
Flags, TypeMapper, Materializer));
}
if (ConstantExpr *CE = dyn_cast<ConstantExpr>(C))
return VM[V] = CE->getWithOperands(Ops, NewTy);
if (isa<ConstantArray>(C))
return VM[V] = ConstantArray::get(cast<ArrayType>(NewTy), Ops);
if (isa<ConstantStruct>(C))
return VM[V] = ConstantStruct::get(cast<StructType>(NewTy), Ops);
if (isa<ConstantMemberPointer>(C))
return VM[V] = ConstantMemberPointer::get(cast<StructType>(NewTy), Ops,
dyn_cast<ConstantMemberPointer>(C)->getClassName());
if (isa<ConstantVector>(C))
return VM[V] = ConstantVector::get(Ops);
// If this is a no-operand constant, it must be because the type was remapped.
if (isa<UndefValue>(C))
return VM[V] = UndefValue::get(NewTy);
if (isa<ConstantAggregateZero>(C))
return VM[V] = ConstantAggregateZero::get(NewTy);
assert(isa<ConstantPointerNull>(C));
return VM[V] = ConstantPointerNull::get(cast<PointerType>(NewTy));
}
Value *llvm::MapValue(const Value *V, ValueToValueMapTy &VM, RemapFlags Flags,
ValueMapTypeRemapper *TypeMapper) {
ValueToValueMapTy::iterator I = VM.find(V);
// If the value already exists in the map, use it.
if (I != VM.end() && I->second) return I->second;
// Global values do not need to be seeded into the VM if they
// are using the identity mapping.
if (isa<GlobalValue>(V) || isa<MDString>(V))
return VM[V] = const_cast<Value*>(V);
if (const InlineAsm *IA = dyn_cast<InlineAsm>(V)) {
// Inline asm may need *type* remapping.
FunctionType *NewTy = IA->getFunctionType();
if (TypeMapper) {
NewTy = cast<FunctionType>(TypeMapper->remapType(NewTy));
if (NewTy != IA->getFunctionType())
V = InlineAsm::get(NewTy, IA->getAsmString(), IA->getConstraintString(),
IA->hasSideEffects(), IA->isAlignStack());
}
return VM[V] = const_cast<Value*>(V);
}
if (const MDNode *MD = dyn_cast<MDNode>(V)) {
// If this is a module-level metadata and we know that nothing at the module
// level is changing, then use an identity mapping.
if (!MD->isFunctionLocal() && (Flags & RF_NoModuleLevelChanges))
return VM[V] = const_cast<Value*>(V);
// Create a dummy node in case we have a metadata cycle.
MDNode *Dummy = MDNode::getTemporary(V->getContext(), ArrayRef<Value*>());
VM[V] = Dummy;
// Check all operands to see if any need to be remapped.
for (unsigned i = 0, e = MD->getNumOperands(); i != e; ++i) {
Value *OP = MD->getOperand(i);
if (OP == 0 || MapValue(OP, VM, Flags, TypeMapper) == OP) continue;
// Ok, at least one operand needs remapping.
SmallVector<Value*, 4> Elts;
Elts.reserve(MD->getNumOperands());
for (i = 0; i != e; ++i) {
Value *Op = MD->getOperand(i);
Elts.push_back(Op ? MapValue(Op, VM, Flags, TypeMapper) : 0);
}
MDNode *NewMD = MDNode::get(V->getContext(), Elts);
Dummy->replaceAllUsesWith(NewMD);
VM[V] = NewMD;
MDNode::deleteTemporary(Dummy);
return NewMD;
}
VM[V] = const_cast<Value*>(V);
MDNode::deleteTemporary(Dummy);
// No operands needed remapping. Use an identity mapping.
return const_cast<Value*>(V);
}
// Okay, this either must be a constant (which may or may not be mappable) or
// is something that is not in the mapping table.
Constant *C = const_cast<Constant*>(dyn_cast<Constant>(V));
if (C == 0)
return 0;
if (BlockAddress *BA = dyn_cast<BlockAddress>(C)) {
Function *F =
cast<Function>(MapValue(BA->getFunction(), VM, Flags, TypeMapper));
BasicBlock *BB = cast_or_null<BasicBlock>(MapValue(BA->getBasicBlock(), VM,
Flags, TypeMapper));
return VM[V] = BlockAddress::get(F, BB ? BB : BA->getBasicBlock());
}
// Otherwise, we have some other constant to remap. Start by checking to see
// if all operands have an identity remapping.
unsigned OpNo = 0, NumOperands = C->getNumOperands();
Value *Mapped = 0;
for (; OpNo != NumOperands; ++OpNo) {
Value *Op = C->getOperand(OpNo);
Mapped = MapValue(Op, VM, Flags, TypeMapper);
if (Mapped != C) break;
}
// See if the type mapper wants to remap the type as well.
Type *NewTy = C->getType();
if (TypeMapper)
NewTy = TypeMapper->remapType(NewTy);
// If the result type and all operands match up, then just insert an identity
// mapping.
if (OpNo == NumOperands && NewTy == C->getType())
return VM[V] = C;
// Okay, we need to create a new constant. We've already processed some or
// all of the operands, set them all up now.
SmallVector<Constant*, 8> Ops;
Ops.reserve(NumOperands);
for (unsigned j = 0; j != OpNo; ++j)
Ops.push_back(cast<Constant>(C->getOperand(j)));
// If one of the operands mismatch, push it and the other mapped operands.
if (OpNo != NumOperands) {
Ops.push_back(cast<Constant>(Mapped));
// Map the rest of the operands that aren't processed yet.
for (++OpNo; OpNo != NumOperands; ++OpNo)
Ops.push_back(MapValue(cast<Constant>(C->getOperand(OpNo)), VM,
Flags, TypeMapper));
}
if (ConstantExpr *CE = dyn_cast<ConstantExpr>(C))
return VM[V] = CE->getWithOperands(Ops, NewTy);
if (isa<ConstantArray>(C))
return VM[V] = ConstantArray::get(cast<ArrayType>(NewTy), Ops);
if (isa<ConstantStruct>(C))
return VM[V] = ConstantStruct::get(cast<StructType>(NewTy), Ops);
if (isa<ConstantVector>(C))
return VM[V] = ConstantVector::get(Ops);
// If this is a no-operand constant, it must be because the type was remapped.
if (isa<UndefValue>(C))
return VM[V] = UndefValue::get(NewTy);
if (isa<ConstantAggregateZero>(C))
return VM[V] = ConstantAggregateZero::get(NewTy);
assert(isa<ConstantPointerNull>(C));
return VM[V] = ConstantPointerNull::get(cast<PointerType>(NewTy));
}
void ControlFlowIntegrity::ParseAnnotations(void) {
GlobalVariable *global_ctors = _M.getNamedGlobal("llvm.global.annotations");
// check for ctor section
if (!global_ctors || !global_ctors->getOperand(0)) {
return;
}
Constant *c = global_ctors->getInitializer();
if (!c)
report_fatal_error("llvm.global.annotations without initializer!", false);
ConstantArray *CA = dyn_cast<ConstantArray>(c);
if (!CA)
report_fatal_error("Cast to ConstantArray failed", true);
for (Value *Op : ValueOpRange(*CA)) {
ConstantStruct *CS = dyn_cast<ConstantStruct>(Op);
if (!CS)
report_fatal_error("Cast to ConstantStruct failed", true);
Constant *FP = CS->getOperand(0);
if (FP->isNullValue())
break; // found a NULL termintator, stop here
ConstantExpr *CE;
Function *F = dyn_cast_or_null<Function>(FP);
if (F == NULL) {
// Strip off constant expression cast
CE = dyn_cast<ConstantExpr>(FP);
if (!CE)
report_fatal_error("Cast to ConstantExpr failed", true);
if (CE->isCast()) {
FP = CE->getOperand(0);
F = dyn_cast_or_null<Function>(FP);
}
}
if (!F)
report_fatal_error("Cast to Function failed", true);
Constant *SP = CS->getOperand(1);
if (SP->isNullValue())
break; // found a NULL termintator, stop here
// Strip off constant expression cast
CE = dyn_cast<ConstantExpr>(SP);
if (!CE)
report_fatal_error("Cast to ConstantExpr failed", true);
if (CE->isCast()) {
SP = CE->getOperand(0);
}
Value *V = SP->getOperand(0);
GlobalVariable *GV = dyn_cast_or_null<GlobalVariable>(V);
if (!GV)
report_fatal_error("Cast to GlobalVariable failed", false);
assert(GV && "cast to GlobalVariable failed");
Constant *cval = GV->getInitializer();
const StringRef s = (cast<ConstantDataArray>(cval))->getAsCString();
if (s == ANNOTATION_IGNORE_BLOCK) {
_IgnoredBlocksFunctions.insert(F->getName());
}
}
if (global_ctors->getNumUses() > 0)
report_fatal_error("llvm.global.annotations uses count is > 0", false);
}
Value *Mapper::mapValue(const Value *V) {
ValueToValueMapTy::iterator I = getVM().find(V);
// If the value already exists in the map, use it.
if (I != getVM().end()) {
assert(I->second && "Unexpected null mapping");
return I->second;
}
// If we have a materializer and it can materialize a value, use that.
if (auto *Materializer = getMaterializer()) {
if (Value *NewV = Materializer->materialize(const_cast<Value *>(V))) {
getVM()[V] = NewV;
return NewV;
}
}
// Global values do not need to be seeded into the VM if they
// are using the identity mapping.
if (isa<GlobalValue>(V)) {
if (Flags & RF_NullMapMissingGlobalValues)
return nullptr;
return getVM()[V] = const_cast<Value *>(V);
}
if (const InlineAsm *IA = dyn_cast<InlineAsm>(V)) {
// Inline asm may need *type* remapping.
FunctionType *NewTy = IA->getFunctionType();
if (TypeMapper) {
NewTy = cast<FunctionType>(TypeMapper->remapType(NewTy));
if (NewTy != IA->getFunctionType())
V = InlineAsm::get(NewTy, IA->getAsmString(), IA->getConstraintString(),
IA->hasSideEffects(), IA->isAlignStack());
}
return getVM()[V] = const_cast<Value *>(V);
}
if (const auto *MDV = dyn_cast<MetadataAsValue>(V)) {
const Metadata *MD = MDV->getMetadata();
if (auto *LAM = dyn_cast<LocalAsMetadata>(MD)) {
// Look through to grab the local value.
if (Value *LV = mapValue(LAM->getValue())) {
if (V == LAM->getValue())
return const_cast<Value *>(V);
return MetadataAsValue::get(V->getContext(), ValueAsMetadata::get(LV));
}
// FIXME: always return nullptr once Verifier::verifyDominatesUse()
// ensures metadata operands only reference defined SSA values.
return (Flags & RF_IgnoreMissingLocals)
? nullptr
: MetadataAsValue::get(V->getContext(),
MDTuple::get(V->getContext(), None));
}
// If this is a module-level metadata and we know that nothing at the module
// level is changing, then use an identity mapping.
if (Flags & RF_NoModuleLevelChanges)
return getVM()[V] = const_cast<Value *>(V);
// Map the metadata and turn it into a value.
auto *MappedMD = mapMetadata(MD);
if (MD == MappedMD)
return getVM()[V] = const_cast<Value *>(V);
return getVM()[V] = MetadataAsValue::get(V->getContext(), MappedMD);
}
// Okay, this either must be a constant (which may or may not be mappable) or
// is something that is not in the mapping table.
Constant *C = const_cast<Constant*>(dyn_cast<Constant>(V));
if (!C)
return nullptr;
if (BlockAddress *BA = dyn_cast<BlockAddress>(C))
return mapBlockAddress(*BA);
auto mapValueOrNull = [this](Value *V) {
auto Mapped = mapValue(V);
assert((Mapped || (Flags & RF_NullMapMissingGlobalValues)) &&
"Unexpected null mapping for constant operand without "
"NullMapMissingGlobalValues flag");
return Mapped;
};
// Otherwise, we have some other constant to remap. Start by checking to see
// if all operands have an identity remapping.
unsigned OpNo = 0, NumOperands = C->getNumOperands();
Value *Mapped = nullptr;
for (; OpNo != NumOperands; ++OpNo) {
Value *Op = C->getOperand(OpNo);
Mapped = mapValueOrNull(Op);
if (!Mapped)
return nullptr;
if (Mapped != Op)
break;
}
// See if the type mapper wants to remap the type as well.
Type *NewTy = C->getType();
if (TypeMapper)
NewTy = TypeMapper->remapType(NewTy);
// If the result type and all operands match up, then just insert an identity
// mapping.
if (OpNo == NumOperands && NewTy == C->getType())
return getVM()[V] = C;
// Okay, we need to create a new constant. We've already processed some or
// all of the operands, set them all up now.
SmallVector<Constant*, 8> Ops;
Ops.reserve(NumOperands);
for (unsigned j = 0; j != OpNo; ++j)
Ops.push_back(cast<Constant>(C->getOperand(j)));
// If one of the operands mismatch, push it and the other mapped operands.
if (OpNo != NumOperands) {
Ops.push_back(cast<Constant>(Mapped));
// Map the rest of the operands that aren't processed yet.
for (++OpNo; OpNo != NumOperands; ++OpNo) {
Mapped = mapValueOrNull(C->getOperand(OpNo));
if (!Mapped)
return nullptr;
Ops.push_back(cast<Constant>(Mapped));
}
}
Type *NewSrcTy = nullptr;
if (TypeMapper)
if (auto *GEPO = dyn_cast<GEPOperator>(C))
NewSrcTy = TypeMapper->remapType(GEPO->getSourceElementType());
if (ConstantExpr *CE = dyn_cast<ConstantExpr>(C))
return getVM()[V] = CE->getWithOperands(Ops, NewTy, false, NewSrcTy);
if (isa<ConstantArray>(C))
return getVM()[V] = ConstantArray::get(cast<ArrayType>(NewTy), Ops);
if (isa<ConstantStruct>(C))
return getVM()[V] = ConstantStruct::get(cast<StructType>(NewTy), Ops);
if (isa<ConstantVector>(C))
return getVM()[V] = ConstantVector::get(Ops);
// If this is a no-operand constant, it must be because the type was remapped.
if (isa<UndefValue>(C))
return getVM()[V] = UndefValue::get(NewTy);
if (isa<ConstantAggregateZero>(C))
return getVM()[V] = ConstantAggregateZero::get(NewTy);
assert(isa<ConstantPointerNull>(C));
return getVM()[V] = ConstantPointerNull::get(cast<PointerType>(NewTy));
}
Value *llvm::MapValue(const Value *V, ValueToValueMapTy &VM,
RemapFlags Flags) {
ValueToValueMapTy::iterator I = VM.find(V);
// If the value already exists in the map, use it.
if (I != VM.end() && I->second) return I->second;
// Global values do not need to be seeded into the VM if they
// are using the identity mapping.
if (isa<GlobalValue>(V) || isa<InlineAsm>(V) || isa<MDString>(V))
return VM[V] = const_cast<Value*>(V);
if (const MDNode *MD = dyn_cast<MDNode>(V)) {
// If this is a module-level metadata and we know that nothing at the module
// level is changing, then use an identity mapping.
if (!MD->isFunctionLocal() && (Flags & RF_NoModuleLevelChanges))
return VM[V] = const_cast<Value*>(V);
// Create a dummy node in case we have a metadata cycle.
MDNode *Dummy = MDNode::getTemporary(V->getContext(), 0, 0);
VM[V] = Dummy;
// Check all operands to see if any need to be remapped.
for (unsigned i = 0, e = MD->getNumOperands(); i != e; ++i) {
Value *OP = MD->getOperand(i);
if (OP == 0 || MapValue(OP, VM, Flags) == OP) continue;
// Ok, at least one operand needs remapping.
SmallVector<Value*, 4> Elts;
Elts.reserve(MD->getNumOperands());
for (i = 0; i != e; ++i) {
Value *Op = MD->getOperand(i);
Elts.push_back(Op ? MapValue(Op, VM, Flags) : 0);
}
MDNode *NewMD = MDNode::get(V->getContext(), Elts.data(), Elts.size());
Dummy->replaceAllUsesWith(NewMD);
VM[V] = NewMD;
MDNode::deleteTemporary(Dummy);
return NewMD;
}
VM[V] = const_cast<Value*>(V);
MDNode::deleteTemporary(Dummy);
// No operands needed remapping. Use an identity mapping.
return const_cast<Value*>(V);
}
// Okay, this either must be a constant (which may or may not be mappable) or
// is something that is not in the mapping table.
Constant *C = const_cast<Constant*>(dyn_cast<Constant>(V));
if (C == 0)
return 0;
if (BlockAddress *BA = dyn_cast<BlockAddress>(C)) {
Function *F = cast<Function>(MapValue(BA->getFunction(), VM, Flags));
BasicBlock *BB = cast_or_null<BasicBlock>(MapValue(BA->getBasicBlock(), VM,
Flags));
return VM[V] = BlockAddress::get(F, BB ? BB : BA->getBasicBlock());
}
for (unsigned i = 0, e = C->getNumOperands(); i != e; ++i) {
Value *Op = C->getOperand(i);
Value *Mapped = MapValue(Op, VM, Flags);
if (Mapped == C) continue;
// Okay, the operands don't all match. We've already processed some or all
// of the operands, set them up now.
std::vector<Constant*> Ops;
Ops.reserve(C->getNumOperands());
for (unsigned j = 0; j != i; ++j)
Ops.push_back(cast<Constant>(C->getOperand(i)));
Ops.push_back(cast<Constant>(Mapped));
// Map the rest of the operands that aren't processed yet.
for (++i; i != e; ++i)
Ops.push_back(cast<Constant>(MapValue(C->getOperand(i), VM, Flags)));
if (ConstantExpr *CE = dyn_cast<ConstantExpr>(C))
return VM[V] = CE->getWithOperands(Ops);
if (ConstantArray *CA = dyn_cast<ConstantArray>(C))
return VM[V] = ConstantArray::get(CA->getType(), Ops);
if (ConstantStruct *CS = dyn_cast<ConstantStruct>(C))
return VM[V] = ConstantStruct::get(CS->getType(), Ops);
assert(isa<ConstantVector>(C) && "Unknown mapped constant type");
return VM[V] = ConstantVector::get(Ops);
}
// If we reach here, all of the operands of the constant match.
return VM[V] = C;
}
DyckVertex* AAAnalyzer::wrapValue(Value * v) {
// if the vertex of v exists, return it, otherwise create one
pair < DyckVertex*, bool> retpair = dgraph->retrieveDyckVertex(v);
if (retpair.second) {
return retpair.first;
}
DyckVertex* vdv = retpair.first;
// constantTy are handled as below.
if (isa<ConstantExpr>(v)) {
// constant expr should be handled like a assignment instruction
if (isa<GEPOperator>(v)) {
DyckVertex * got = handle_gep((GEPOperator*) v);
makeAlias(vdv, got);
} else if (((ConstantExpr*) v)->isCast()) {
// errs() << *v << "\n";
DyckVertex * got = wrapValue(((ConstantExpr*) v)->getOperand(0));
makeAlias(vdv, got);
} else {
unsigned opcode = ((ConstantExpr*) v)->getOpcode();
switch (opcode) {
case 23: // BinaryConstantExpr "and"
case 24: // BinaryConstantExpr "or"
{
// do nothing
}
break;
default:
{
errs() << "ERROR when handle the following constant expression\n";
errs() << *v << "\n";
errs() << ((ConstantExpr*) v)->getOpcode() << "\n";
errs() << ((ConstantExpr*) v)->getOpcodeName() << "\n";
errs().flush();
exit(-1);
}
break;
}
}
} else if (isa<ConstantArray>(v)) {
#ifndef ARRAY_SIMPLIFIED
DyckVertex* ptr = addPtrTo(NULL, vdv, dgraph);
DyckVertex* current = ptr;
Constant * vAgg = (Constant*) v;
int numElmt = vAgg->getNumOperands();
for (int i = 0; i < numElmt; i++) {
Value * vi = vAgg->getOperand(i);
DyckVertex* viptr = addPtrOffset(current, i * dl.getTypeAllocSize(vi->getType()), dgraph);
addPtrTo(viptr, wrapValue(vi, dgraph, dl), dgraph);
}
#else
Constant * vAgg = (Constant*) v;
int numElmt = vAgg->getNumOperands();
for (int i = 0; i < numElmt; i++) {
Value * vi = vAgg->getOperand(i);
makeAlias(vdv, wrapValue(vi));
}
#endif
} else if (isa<ConstantStruct>(v)) {
//DyckVertex* ptr = addPtrTo(NULL, vdv);
//DyckVertex* current = ptr;
Constant * vAgg = (Constant*) v;
int numElmt = vAgg->getNumOperands();
for (int i = 0; i < numElmt; i++) {
Value * vi = vAgg->getOperand(i);
addField(vdv, -2 - i, wrapValue(vi));
}
} else if (isa<GlobalValue>(v)) {
if (isa<GlobalVariable>(v)) {
GlobalVariable * global = (GlobalVariable *) v;
if (global->hasInitializer()) {
Value * initializer = global->getInitializer();
if (!isa<UndefValue>(initializer)) {
DyckVertex * initVer = wrapValue(initializer);
addPtrTo(vdv, initVer);
}
}
} else if (isa<GlobalAlias>(v)) {
GlobalAlias * global = (GlobalAlias *) v;
Value * aliasee = global->getAliasee();
makeAlias(vdv, wrapValue(aliasee));
} else if (isa<Function>(v)) {
// do nothing
} // no else
} else if (isa<ConstantInt>(v) || isa<ConstantFP>(v) || isa<ConstantPointerNull>(v) || isa<UndefValue>(v)) {
// do nothing
} else if (isa<ConstantDataArray>(v) || isa<ConstantAggregateZero>(v)) {
// do nothing
} else if (isa<BlockAddress>(v)) {
// do nothing
} else if (isa<ConstantDataVector>(v)) {
errs() << "ERROR when handle the following ConstantDataSequential, ConstantDataVector\n";
errs() << *v << "\n";
errs().flush();
exit(-1);
} else if (isa<ConstantVector>(v)) {
errs() << "ERROR when handle the following ConstantVector\n";
errs() << *v << "\n";
errs().flush();
exit(-1);
} else if (isa<Constant>(v)) {
errs() << "ERROR when handle the following constant value\n";
errs() << *v << "\n";
errs().flush();
exit(-1);
}
return vdv;
}