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Use separate ValueList for metadata.

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This fixes PR4666.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78056 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel
2009-08-04 06:00:18 +00:00
parent 3b24c01720
commit d5ac40457b
7 changed files with 242 additions and 44 deletions
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lib/Bitcode/Reader/BitcodeReader.cpp
+44 -6
View File
@@ -34,6 +34,7 @@ void BitcodeReader::FreeState() {
Buffer = 0;
std::vector<PATypeHolder>().swap(TypeList);
ValueList.clear();
MDValueList.clear();
std::vector<AttrListPtr>().swap(MAttributes);
std::vector<BasicBlock*>().swap(FunctionBBs);
@@ -312,6 +313,41 @@ void BitcodeReaderValueList::ResolveConstantForwardRefs() {
}
}
void BitcodeReaderMDValueList::AssignValue(Value *V, unsigned Idx) {
if (Idx == size()) {
push_back(V);
return;
}
if (Idx >= size())
resize(Idx+1);
WeakVH &OldV = MDValuePtrs[Idx];
if (OldV == 0) {
OldV = V;
return;
}
// If there was a forward reference to this value, replace it.
Value *PrevVal = OldV;
OldV->replaceAllUsesWith(V);
delete PrevVal;
}
Value *BitcodeReaderMDValueList::getValueFwdRef(unsigned Idx) {
if (Idx >= size())
resize(Idx + 1);
if (Value *V = MDValuePtrs[Idx]) {
assert(V->getType() == Type::MetadataTy && "Type mismatch in value table!");
return V;
}
// Create and return a placeholder, which will later be RAUW'd.
Value *V = new Argument(Type::MetadataTy);
MDValuePtrs[Idx] = V;
return V;
}
const Type *BitcodeReader::getTypeByID(unsigned ID, bool isTypeTable) {
// If the TypeID is in range, return it.
@@ -700,7 +736,7 @@ bool BitcodeReader::ParseValueSymbolTable() {
}
bool BitcodeReader::ParseMetadata() {
unsigned NextValueNo = ValueList.size();
unsigned NextValueNo = MDValueList.size();
if (Stream.EnterSubBlock(bitc::METADATA_BLOCK_ID))
return Error("Malformed block record");
@@ -752,13 +788,13 @@ bool BitcodeReader::ParseMetadata() {
unsigned Size = Record.size();
SmallVector<MetadataBase*, 8> Elts;
for (unsigned i = 0; i != Size; ++i) {
Value *MD = ValueList.getValueFwdRef(Record[i], Type::MetadataTy);
Value *MD = MDValueList.getValueFwdRef(Record[i]);
if (MetadataBase *B = dyn_cast<MetadataBase>(MD))
Elts.push_back(B);
}
Value *V = NamedMDNode::Create(Name.c_str(), Elts.data(), Elts.size(),
TheModule);
ValueList.AssignValue(V, NextValueNo++);
MDValueList.AssignValue(V, NextValueNo++);
break;
}
case bitc::METADATA_NODE: {
@@ -769,13 +805,15 @@ bool BitcodeReader::ParseMetadata() {
SmallVector<Value*, 8> Elts;
for (unsigned i = 0; i != Size; i += 2) {
const Type *Ty = getTypeByID(Record[i], false);
if (Ty != Type::VoidTy)
if (Ty == Type::MetadataTy)
Elts.push_back(MDValueList.getValueFwdRef(Record[i+1]));
else if (Ty != Type::VoidTy)
Elts.push_back(ValueList.getValueFwdRef(Record[i+1], Ty));
else
Elts.push_back(NULL);
}
Value *V = MDNode::get(Context, &Elts[0], Elts.size());
ValueList.AssignValue(V, NextValueNo++);
MDValueList.AssignValue(V, NextValueNo++);
break;
}
case bitc::METADATA_STRING: {
@@ -786,7 +824,7 @@ bool BitcodeReader::ParseMetadata() {
String[i] = Record[i];
Value *V = MDString::get(Context,
StringRef(String.data(), String.size()));
ValueList.AssignValue(V, NextValueNo++);
MDValueList.AssignValue(V, NextValueNo++);
break;
}
}
lib/Bitcode/Reader/BitcodeReader.h
+41 -2
View File
@@ -86,6 +86,41 @@ public:
void ResolveConstantForwardRefs();
};
//===----------------------------------------------------------------------===//
// BitcodeReaderMDValueList Class
//===----------------------------------------------------------------------===//
class BitcodeReaderMDValueList {
std::vector<WeakVH> MDValuePtrs;
LLVMContext& Context;
public:
BitcodeReaderMDValueList(LLVMContext& C) : Context(C) {}
// vector compatibility methods
unsigned size() const { return MDValuePtrs.size(); }
void resize(unsigned N) { MDValuePtrs.resize(N); }
void push_back(Value *V) { MDValuePtrs.push_back(V); }
void clear() { MDValuePtrs.clear(); }
Value *back() const { return MDValuePtrs.back(); }
void pop_back() { MDValuePtrs.pop_back(); }
bool empty() const { return MDValuePtrs.empty(); }
Value *operator[](unsigned i) const {
assert(i < MDValuePtrs.size());
return MDValuePtrs[i];
}
void shrinkTo(unsigned N) {
assert(N <= size() && "Invalid shrinkTo request!");
MDValuePtrs.resize(N);
}
Value *getValueFwdRef(unsigned Idx);
void AssignValue(Value *V, unsigned Idx);
};
class BitcodeReader : public ModuleProvider {
LLVMContext& Context;
MemoryBuffer *Buffer;
@@ -96,6 +131,7 @@ class BitcodeReader : public ModuleProvider {
std::vector<PATypeHolder> TypeList;
BitcodeReaderValueList ValueList;
BitcodeReaderMDValueList MDValueList;
std::vector<std::pair<GlobalVariable*, unsigned> > GlobalInits;
std::vector<std::pair<GlobalAlias*, unsigned> > AliasInits;
@@ -127,7 +163,7 @@ class BitcodeReader : public ModuleProvider {
DenseMap<Function*, std::pair<uint64_t, unsigned> > DeferredFunctionInfo;
public:
explicit BitcodeReader(MemoryBuffer *buffer, LLVMContext& C)
: Context(C), Buffer(buffer), ErrorString(0), ValueList(C) {
: Context(C), Buffer(buffer), ErrorString(0), ValueList(C), MDValueList(C) {
HasReversedFunctionsWithBodies = false;
}
~BitcodeReader() {
@@ -160,7 +196,10 @@ public:
private:
const Type *getTypeByID(unsigned ID, bool isTypeTable = false);
Value *getFnValueByID(unsigned ID, const Type *Ty) {
return ValueList.getValueFwdRef(ID, Ty);
if (Ty == Type::MetadataTy)
return MDValueList.getValueFwdRef(ID);
else
return ValueList.getValueFwdRef(ID, Ty);
}
BasicBlock *getBasicBlock(unsigned ID) const {
if (ID >= FunctionBBs.size()) return 0; // Invalid ID