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Remove a dead field, make the map go to integer type ID to hash better and

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avoid a getType.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@18691 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2004-12-09 06:19:44 +00:00
parent 31127e1d89
commit 389bd04b96
2 changed files with 12 additions and 17 deletions
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25
lib/Bytecode/Reader/Reader.cpp
View File

@ -35,14 +35,11 @@ namespace {
/// @brief A class for maintaining the slot number definition
/// as a placeholder for the actual definition for forward constants defs.
class ConstantPlaceHolder : public ConstantExpr {
unsigned ID;
ConstantPlaceHolder(); // DO NOT IMPLEMENT
void operator=(const ConstantPlaceHolder &); // DO NOT IMPLEMENT
public:
ConstantPlaceHolder(const Type *Ty, unsigned id)
: ConstantExpr(Instruction::UserOp1, Constant::getNullValue(Ty), Ty),
ID(id) {}
unsigned getID() { return ID; }
ConstantPlaceHolder(const Type *Ty)
: ConstantExpr(Instruction::UserOp1, Constant::getNullValue(Ty), Ty) {}
};
}
@ -494,8 +491,7 @@ Constant* BytecodeReader::getConstantValue(unsigned TypeSlot, unsigned Slot) {
error("Value for slot " + utostr(Slot) +
" is expected to be a constant!");
const Type *Ty = getType(TypeSlot);
std::pair<const Type*, unsigned> Key(Ty, Slot);
std::pair<unsigned, unsigned> Key(TypeSlot, Slot);
ConstantRefsType::iterator I = ConstantFwdRefs.lower_bound(Key);
if (I != ConstantFwdRefs.end() && I->first == Key) {
@ -503,7 +499,7 @@ Constant* BytecodeReader::getConstantValue(unsigned TypeSlot, unsigned Slot) {
} else {
// Create a placeholder for the constant reference and
// keep track of the fact that we have a forward ref to recycle it
Constant *C = new ConstantPlaceHolder(Ty, Slot);
Constant *C = new ConstantPlaceHolder(getType(TypeSlot));
// Keep track of the fact that we have a forward ref to recycle it
ConstantFwdRefs.insert(I, std::make_pair(Key, C));
@ -1477,9 +1473,10 @@ Constant *BytecodeReader::ParseConstantValue(unsigned TypeID) {
/// referenced constants in the ConstantFwdRefs map. It uses the
/// replaceAllUsesWith method of Value class to substitute the placeholder
/// instance with the actual instance.
void BytecodeReader::ResolveReferencesToConstant(Constant *NewV, unsigned Slot){
void BytecodeReader::ResolveReferencesToConstant(Constant *NewV, unsigned Typ,
unsigned Slot) {
ConstantRefsType::iterator I =
ConstantFwdRefs.find(std::make_pair(NewV->getType(), Slot));
ConstantFwdRefs.find(std::make_pair(Typ, Slot));
if (I == ConstantFwdRefs.end()) return; // Never forward referenced?
Value *PH = I->second; // Get the placeholder...
@ -1518,7 +1515,7 @@ void BytecodeReader::ParseStringConstants(unsigned NumEntries, ValueTable &Tab){
// Create the constant, inserting it as needed.
Constant *C = ConstantArray::get(ATy, Elements);
unsigned Slot = insertValue(C, Typ, Tab);
ResolveReferencesToConstant(C, Slot);
ResolveReferencesToConstant(C, Typ, Slot);
if (Handler) Handler->handleConstantString(cast<ConstantArray>(C));
}
}
@ -1564,7 +1561,7 @@ void BytecodeReader::ParseConstantPool(ValueTable &Tab,
if (&Tab != &ModuleValues && Typ < ModuleValues.size() &&
ModuleValues[Typ])
Slot += ModuleValues[Typ]->size();
ResolveReferencesToConstant(C, Slot);
ResolveReferencesToConstant(C, Typ, Slot);
}
}
}
@ -1572,14 +1569,12 @@ void BytecodeReader::ParseConstantPool(ValueTable &Tab,
// After we have finished parsing the constant pool, we had better not have
// any dangling references left.
if (!ConstantFwdRefs.empty()) {
typedef std::map<std::pair<const Type*,unsigned>, Constant*> ConstantRefsType;
ConstantRefsType::const_iterator I = ConstantFwdRefs.begin();
const Type* missingType = I->first.first;
Constant* missingConst = I->second;
error(utostr(ConstantFwdRefs.size()) +
" unresolved constant reference exist. First one is '" +
missingConst->getName() + "' of type '" +
missingType->getDescription() + "'.");
missingConst->getType()->getDescription() + "'.");
}
checkPastBlockEnd("Constant Pool");

4
lib/Bytecode/Reader/Reader.h
View File

@ -102,7 +102,7 @@ public:
/// This map is needed so that forward references to constants can be looked
/// up by Type and slot number when resolving those references.
/// @brief A mapping of a Type/slot pair to a Constant*.
typedef std::map<std::pair<const Type*,unsigned>, Constant*> ConstantRefsType;
typedef std::map<std::pair<unsigned,unsigned>, Constant*> ConstantRefsType;
/// For lazy read-in of functions, we need to save the location in the
/// data stream where the function is located. This structure provides that
@ -453,7 +453,7 @@ private:
/// @brief Resolve all references to the placeholder (if any) for the
/// given constant.
void ResolveReferencesToConstant(Constant *C, unsigned Slot);
void ResolveReferencesToConstant(Constant *C, unsigned Typ, unsigned Slot);
/// @brief Release our memory.
void freeState() {