ValueEnumerator.cpp [plain text]
#include "ValueEnumerator.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/Constants.h"
#include "llvm/DerivedTypes.h"
#include "llvm/Module.h"
#include "llvm/ValueSymbolTable.h"
#include "llvm/Instructions.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/raw_ostream.h"
#include <algorithm>
using namespace llvm;
static bool isIntegerValue(const std::pair<const Value*, unsigned> &V) {
return V.first->getType()->isIntegerTy();
}
ValueEnumerator::ValueEnumerator(const Module *M) {
for (Module::const_global_iterator I = M->global_begin(),
E = M->global_end(); I != E; ++I)
EnumerateValue(I);
for (Module::const_iterator I = M->begin(), E = M->end(); I != E; ++I) {
EnumerateValue(I);
EnumerateAttributes(cast<Function>(I)->getAttributes());
}
for (Module::const_alias_iterator I = M->alias_begin(), E = M->alias_end();
I != E; ++I)
EnumerateValue(I);
unsigned FirstConstant = Values.size();
for (Module::const_global_iterator I = M->global_begin(),
E = M->global_end(); I != E; ++I)
if (I->hasInitializer())
EnumerateValue(I->getInitializer());
for (Module::const_alias_iterator I = M->alias_begin(), E = M->alias_end();
I != E; ++I)
EnumerateValue(I->getAliasee());
EnumerateValueSymbolTable(M->getValueSymbolTable());
EnumerateNamedMetadata(M);
SmallVector<std::pair<unsigned, MDNode*>, 8> MDs;
for (Module::const_iterator F = M->begin(), E = M->end(); F != E; ++F) {
for (Function::const_arg_iterator I = F->arg_begin(), E = F->arg_end();
I != E; ++I)
EnumerateType(I->getType());
for (Function::const_iterator BB = F->begin(), E = F->end(); BB != E; ++BB)
for (BasicBlock::const_iterator I = BB->begin(), E = BB->end(); I!=E;++I){
for (User::const_op_iterator OI = I->op_begin(), E = I->op_end();
OI != E; ++OI) {
if (MDNode *MD = dyn_cast<MDNode>(*OI))
if (MD->isFunctionLocal() && MD->getFunction())
continue;
EnumerateOperandType(*OI);
}
EnumerateType(I->getType());
if (const CallInst *CI = dyn_cast<CallInst>(I))
EnumerateAttributes(CI->getAttributes());
else if (const InvokeInst *II = dyn_cast<InvokeInst>(I))
EnumerateAttributes(II->getAttributes());
MDs.clear();
I->getAllMetadataOtherThanDebugLoc(MDs);
for (unsigned i = 0, e = MDs.size(); i != e; ++i)
EnumerateMetadata(MDs[i].second);
if (!I->getDebugLoc().isUnknown()) {
MDNode *Scope, *IA;
I->getDebugLoc().getScopeAndInlinedAt(Scope, IA, I->getContext());
if (Scope) EnumerateMetadata(Scope);
if (IA) EnumerateMetadata(IA);
}
}
}
OptimizeConstants(FirstConstant, Values.size());
}
unsigned ValueEnumerator::getInstructionID(const Instruction *Inst) const {
InstructionMapType::const_iterator I = InstructionMap.find(Inst);
assert(I != InstructionMap.end() && "Instruction is not mapped!");
return I->second;
}
void ValueEnumerator::setInstructionID(const Instruction *I) {
InstructionMap[I] = InstructionCount++;
}
unsigned ValueEnumerator::getValueID(const Value *V) const {
if (isa<MDNode>(V) || isa<MDString>(V)) {
ValueMapType::const_iterator I = MDValueMap.find(V);
assert(I != MDValueMap.end() && "Value not in slotcalculator!");
return I->second-1;
}
ValueMapType::const_iterator I = ValueMap.find(V);
assert(I != ValueMap.end() && "Value not in slotcalculator!");
return I->second-1;
}
void ValueEnumerator::dump() const {
print(dbgs(), ValueMap, "Default");
dbgs() << '\n';
print(dbgs(), MDValueMap, "MetaData");
dbgs() << '\n';
}
void ValueEnumerator::print(raw_ostream &OS, const ValueMapType &Map,
const char *Name) const {
OS << "Map Name: " << Name << "\n";
OS << "Size: " << Map.size() << "\n";
for (ValueMapType::const_iterator I = Map.begin(),
E = Map.end(); I != E; ++I) {
const Value *V = I->first;
if (V->hasName())
OS << "Value: " << V->getName();
else
OS << "Value: [null]\n";
V->dump();
OS << " Uses(" << std::distance(V->use_begin(),V->use_end()) << "):";
for (Value::const_use_iterator UI = V->use_begin(), UE = V->use_end();
UI != UE; ++UI) {
if (UI != V->use_begin())
OS << ",";
if((*UI)->hasName())
OS << " " << (*UI)->getName();
else
OS << " [null]";
}
OS << "\n\n";
}
}
namespace {
struct CstSortPredicate {
ValueEnumerator &VE;
explicit CstSortPredicate(ValueEnumerator &ve) : VE(ve) {}
bool operator()(const std::pair<const Value*, unsigned> &LHS,
const std::pair<const Value*, unsigned> &RHS) {
if (LHS.first->getType() != RHS.first->getType())
return VE.getTypeID(LHS.first->getType()) <
VE.getTypeID(RHS.first->getType());
return LHS.second > RHS.second;
}
};
}
void ValueEnumerator::OptimizeConstants(unsigned CstStart, unsigned CstEnd) {
if (CstStart == CstEnd || CstStart+1 == CstEnd) return;
CstSortPredicate P(*this);
std::stable_sort(Values.begin()+CstStart, Values.begin()+CstEnd, P);
std::partition(Values.begin()+CstStart, Values.begin()+CstEnd,
isIntegerValue);
for (; CstStart != CstEnd; ++CstStart)
ValueMap[Values[CstStart].first] = CstStart+1;
}
void ValueEnumerator::EnumerateValueSymbolTable(const ValueSymbolTable &VST) {
for (ValueSymbolTable::const_iterator VI = VST.begin(), VE = VST.end();
VI != VE; ++VI)
EnumerateValue(VI->getValue());
}
void ValueEnumerator::EnumerateNamedMetadata(const Module *M) {
for (Module::const_named_metadata_iterator I = M->named_metadata_begin(),
E = M->named_metadata_end(); I != E; ++I)
EnumerateNamedMDNode(I);
}
void ValueEnumerator::EnumerateNamedMDNode(const NamedMDNode *MD) {
for (unsigned i = 0, e = MD->getNumOperands(); i != e; ++i)
EnumerateMetadata(MD->getOperand(i));
}
void ValueEnumerator::EnumerateMDNodeOperands(const MDNode *N) {
for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) {
if (Value *V = N->getOperand(i)) {
if (isa<MDNode>(V) || isa<MDString>(V))
EnumerateMetadata(V);
else if (!isa<Instruction>(V) && !isa<Argument>(V))
EnumerateValue(V);
} else
EnumerateType(Type::getVoidTy(N->getContext()));
}
}
void ValueEnumerator::EnumerateMetadata(const Value *MD) {
assert((isa<MDNode>(MD) || isa<MDString>(MD)) && "Invalid metadata kind");
EnumerateType(MD->getType());
const MDNode *N = dyn_cast<MDNode>(MD);
if (N && N->isFunctionLocal() && N->getFunction()) {
EnumerateMDNodeOperands(N);
return;
}
unsigned &MDValueID = MDValueMap[MD];
if (MDValueID) {
MDValues[MDValueID-1].second++;
return;
}
MDValues.push_back(std::make_pair(MD, 1U));
MDValueID = MDValues.size();
if (N)
EnumerateMDNodeOperands(N);
}
void ValueEnumerator::EnumerateFunctionLocalMetadata(const MDNode *N) {
assert(N->isFunctionLocal() && N->getFunction() &&
"EnumerateFunctionLocalMetadata called on non-function-local mdnode!");
EnumerateType(N->getType());
unsigned &MDValueID = MDValueMap[N];
if (MDValueID) {
MDValues[MDValueID-1].second++;
return;
}
MDValues.push_back(std::make_pair(N, 1U));
MDValueID = MDValues.size();
for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i)
if (Value *V = N->getOperand(i)) {
if (MDNode *O = dyn_cast<MDNode>(V)) {
if (O->isFunctionLocal() && O->getFunction())
EnumerateFunctionLocalMetadata(O);
} else if (isa<Instruction>(V) || isa<Argument>(V))
EnumerateValue(V);
}
FunctionLocalMDs.push_back(N);
}
void ValueEnumerator::EnumerateValue(const Value *V) {
assert(!V->getType()->isVoidTy() && "Can't insert void values!");
assert(!isa<MDNode>(V) && !isa<MDString>(V) &&
"EnumerateValue doesn't handle Metadata!");
unsigned &ValueID = ValueMap[V];
if (ValueID) {
Values[ValueID-1].second++;
return;
}
EnumerateType(V->getType());
if (const Constant *C = dyn_cast<Constant>(V)) {
if (isa<GlobalValue>(C)) {
} else if (C->getNumOperands()) {
for (User::const_op_iterator I = C->op_begin(), E = C->op_end();
I != E; ++I)
if (!isa<BasicBlock>(*I)) EnumerateValue(*I);
Values.push_back(std::make_pair(V, 1U));
ValueMap[V] = Values.size();
return;
}
}
Values.push_back(std::make_pair(V, 1U));
ValueID = Values.size();
}
void ValueEnumerator::EnumerateType(Type *Ty) {
unsigned *TypeID = &TypeMap[Ty];
if (*TypeID)
return;
if (StructType *STy = dyn_cast<StructType>(Ty))
if (!STy->isLiteral())
*TypeID = ~0U;
for (Type::subtype_iterator I = Ty->subtype_begin(), E = Ty->subtype_end();
I != E; ++I)
EnumerateType(*I);
TypeID = &TypeMap[Ty];
if (*TypeID && *TypeID != ~0U)
return;
Types.push_back(Ty);
*TypeID = Types.size();
}
void ValueEnumerator::EnumerateOperandType(const Value *V) {
EnumerateType(V->getType());
if (const Constant *C = dyn_cast<Constant>(V)) {
if (ValueMap.count(V)) return;
for (unsigned i = 0, e = C->getNumOperands(); i != e; ++i) {
const Value *Op = C->getOperand(i);
if (isa<BasicBlock>(Op)) continue;
EnumerateOperandType(Op);
}
if (const MDNode *N = dyn_cast<MDNode>(V)) {
for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i)
if (Value *Elem = N->getOperand(i))
EnumerateOperandType(Elem);
}
} else if (isa<MDString>(V) || isa<MDNode>(V))
EnumerateMetadata(V);
}
void ValueEnumerator::EnumerateAttributes(const AttrListPtr &PAL) {
if (PAL.isEmpty()) return; unsigned &Entry = AttributeMap[PAL.getRawPointer()];
if (Entry == 0) {
Attributes.push_back(PAL);
Entry = Attributes.size();
}
}
void ValueEnumerator::incorporateFunction(const Function &F) {
InstructionCount = 0;
NumModuleValues = Values.size();
NumModuleMDValues = MDValues.size();
for (Function::const_arg_iterator I = F.arg_begin(), E = F.arg_end();
I != E; ++I)
EnumerateValue(I);
FirstFuncConstantID = Values.size();
for (Function::const_iterator BB = F.begin(), E = F.end(); BB != E; ++BB) {
for (BasicBlock::const_iterator I = BB->begin(), E = BB->end(); I!=E; ++I)
for (User::const_op_iterator OI = I->op_begin(), E = I->op_end();
OI != E; ++OI) {
if ((isa<Constant>(*OI) && !isa<GlobalValue>(*OI)) ||
isa<InlineAsm>(*OI))
EnumerateValue(*OI);
}
BasicBlocks.push_back(BB);
ValueMap[BB] = BasicBlocks.size();
}
OptimizeConstants(FirstFuncConstantID, Values.size());
EnumerateAttributes(F.getAttributes());
FirstInstID = Values.size();
SmallVector<MDNode *, 8> FnLocalMDVector;
for (Function::const_iterator BB = F.begin(), E = F.end(); BB != E; ++BB) {
for (BasicBlock::const_iterator I = BB->begin(), E = BB->end(); I!=E; ++I) {
for (User::const_op_iterator OI = I->op_begin(), E = I->op_end();
OI != E; ++OI) {
if (MDNode *MD = dyn_cast<MDNode>(*OI))
if (MD->isFunctionLocal() && MD->getFunction())
FnLocalMDVector.push_back(MD);
}
SmallVector<std::pair<unsigned, MDNode*>, 8> MDs;
I->getAllMetadataOtherThanDebugLoc(MDs);
for (unsigned i = 0, e = MDs.size(); i != e; ++i) {
MDNode *N = MDs[i].second;
if (N->isFunctionLocal() && N->getFunction())
FnLocalMDVector.push_back(N);
}
if (!I->getType()->isVoidTy())
EnumerateValue(I);
}
}
for (unsigned i = 0, e = FnLocalMDVector.size(); i != e; ++i)
EnumerateFunctionLocalMetadata(FnLocalMDVector[i]);
}
void ValueEnumerator::purgeFunction() {
for (unsigned i = NumModuleValues, e = Values.size(); i != e; ++i)
ValueMap.erase(Values[i].first);
for (unsigned i = NumModuleMDValues, e = MDValues.size(); i != e; ++i)
MDValueMap.erase(MDValues[i].first);
for (unsigned i = 0, e = BasicBlocks.size(); i != e; ++i)
ValueMap.erase(BasicBlocks[i]);
Values.resize(NumModuleValues);
MDValues.resize(NumModuleMDValues);
BasicBlocks.clear();
FunctionLocalMDs.clear();
}
static void IncorporateFunctionInfoGlobalBBIDs(const Function *F,
DenseMap<const BasicBlock*, unsigned> &IDMap) {
unsigned Counter = 0;
for (Function::const_iterator BB = F->begin(), E = F->end(); BB != E; ++BB)
IDMap[BB] = ++Counter;
}
unsigned ValueEnumerator::getGlobalBasicBlockID(const BasicBlock *BB) const {
unsigned &Idx = GlobalBasicBlockIDs[BB];
if (Idx != 0)
return Idx-1;
IncorporateFunctionInfoGlobalBBIDs(BB->getParent(), GlobalBasicBlockIDs);
return getGlobalBasicBlockID(BB);
}