//===----------------------------------------------------------------------===//
#include "llvm/DerivedTypes.h"
-#include "llvm/Tools/StringExtras.h"
+#include "llvm/SymbolTable.h"
+#include "llvm/Constants.h"
+#include "Support/StringExtras.h"
+#include "Support/STLExtras.h"
+#include <iostream>
+#include <algorithm>
+
+using std::vector;
+using std::string;
+using std::map;
+using std::swap;
+using std::make_pair;
+using std::cerr;
+
+// DEBUG_MERGE_TYPES - Enable this #define to see how and when derived types are
+// created and later destroyed, all in an effort to make sure that there is only
+// a single cannonical version of a type.
+//
+//#define DEBUG_MERGE_TYPES 1
+
+
//===----------------------------------------------------------------------===//
// Type Class Implementation
static unsigned CurUID = 0;
static vector<const Type *> UIDMappings;
-Type::Type(const string &name, PrimitiveID id)
- : Value(Type::TypeTy, Value::TypeVal, name) {
- ID = id;
- ConstRulesImpl = 0;
+void PATypeHolder::dump() const {
+ cerr << "PATypeHolder(" << (void*)this << ")\n";
+}
+
+Type::Type(const string &name, PrimitiveID id)
+ : Value(Type::TypeTy, Value::TypeVal) {
+ setDescription(name);
+ ID = id;
+ Abstract = Recursive = false;
UID = CurUID++; // Assign types UID's as they are created
UIDMappings.push_back(this);
}
+void Type::setName(const string &Name, SymbolTable *ST) {
+ assert(ST && "Type::setName - Must provide symbol table argument!");
+
+ if (Name.size()) ST->insert(Name, this);
+}
+
+
const Type *Type::getUniqueIDType(unsigned UID) {
assert(UID < UIDMappings.size() &&
"Type::getPrimitiveType: UID out of range!");
case DoubleTyID: return DoubleTy;
case TypeTyID : return TypeTy;
case LabelTyID : return LabelTy;
- case LockTyID : return LockTy;
- case FillerTyID: return new Type("XXX FILLER XXX", FillerTyID); // TODO:KILLME
default:
return 0;
}
}
+// isLosslesslyConvertableTo - Return true if this type can be converted to
+// 'Ty' without any reinterpretation of bits. For example, uint to int.
+//
+bool Type::isLosslesslyConvertableTo(const Type *Ty) const {
+ if (this == Ty) return true;
+ if ((!isPrimitiveType() && !isa<PointerType>(this)) ||
+ (!isa<PointerType>(Ty) && !Ty->isPrimitiveType())) return false;
+
+ if (getPrimitiveID() == Ty->getPrimitiveID())
+ return true; // Handles identity cast, and cast of differing pointer types
+
+ // Now we know that they are two differing primitive or pointer types
+ switch (getPrimitiveID()) {
+ case Type::UByteTyID: return Ty == Type::SByteTy;
+ case Type::SByteTyID: return Ty == Type::UByteTy;
+ case Type::UShortTyID: return Ty == Type::ShortTy;
+ case Type::ShortTyID: return Ty == Type::UShortTy;
+ case Type::UIntTyID: return Ty == Type::IntTy;
+ case Type::IntTyID: return Ty == Type::UIntTy;
+ case Type::ULongTyID:
+ case Type::LongTyID:
+ case Type::PointerTyID:
+ return Ty == Type::ULongTy || Ty == Type::LongTy || isa<PointerType>(Ty);
+ default:
+ return false; // Other types have no identity values
+ }
+}
+
+// getPrimitiveSize - Return the basic size of this type if it is a primative
+// type. These are fixed by LLVM and are not target dependant. This will
+// return zero if the type does not have a size or is not a primitive type.
+//
+unsigned Type::getPrimitiveSize() const {
+ switch (getPrimitiveID()) {
+#define HANDLE_PRIM_TYPE(TY,SIZE) case TY##TyID: return SIZE;
+#include "llvm/Type.def"
+ default: return 0;
+ }
+}
+
+
+bool StructType::indexValid(const Value *V) const {
+ if (!isa<Constant>(V)) return false;
+ if (V->getType() != Type::UByteTy) return false;
+ unsigned Idx = cast<ConstantUInt>(V)->getValue();
+ return Idx < ETypes.size();
+}
+
+// getTypeAtIndex - Given an index value into the type, return the type of the
+// element. For a structure type, this must be a constant value...
+//
+const Type *StructType::getTypeAtIndex(const Value *V) const {
+ assert(isa<Constant>(V) && "Structure index must be a constant!!");
+ assert(V->getType() == Type::UByteTy && "Structure index must be ubyte!");
+ unsigned Idx = cast<ConstantUInt>(V)->getValue();
+ assert(Idx < ETypes.size() && "Structure index out of range!");
+ assert(indexValid(V) && "Invalid structure index!"); // Duplicate check
+
+ return ETypes[Idx];
+}
//===----------------------------------------------------------------------===//
// isSigned - Return whether a numeric type is signed.
virtual bool isSigned() const { return 1; }
-
- // isIntegral - Return whether this is one of the integer types
+
+ // isIntegral - Equivalent to isSigned() || isUnsigned, but with only a single
+ // virtual function invocation.
+ //
virtual bool isIntegral() const { return 1; }
};
// isUnsigned - Return whether a numeric type is signed.
virtual bool isUnsigned() const { return 1; }
-
- // isIntegral - Return whether this is one of the integer types
+
+ // isIntegral - Equivalent to isSigned() || isUnsigned, but with only a single
+ // virtual function invocation.
+ //
virtual bool isIntegral() const { return 1; }
};
// Static 'Type' data
//===----------------------------------------------------------------------===//
-const Type *Type::VoidTy = new Type("void" , VoidTyID),
- *Type::BoolTy = new Type("bool" , BoolTyID),
- *Type::SByteTy = new SignedIntType("sbyte" , SByteTyID, 1),
- *Type::UByteTy = new UnsignedIntType("ubyte" , UByteTyID, 1),
- *Type::ShortTy = new SignedIntType("short" , ShortTyID, 2),
- *Type::UShortTy = new UnsignedIntType("ushort", UShortTyID, 2),
- *Type::IntTy = new SignedIntType("int" , IntTyID, 4),
- *Type::UIntTy = new UnsignedIntType("uint" , UIntTyID, 4),
- *Type::LongTy = new SignedIntType("long" , LongTyID, 8),
- *Type::ULongTy = new UnsignedIntType("ulong" , ULongTyID, 8),
- *Type::FloatTy = new Type("float" , FloatTyID),
- *Type::DoubleTy = new Type("double", DoubleTyID),
- *Type::TypeTy = &TheTypeType,
- *Type::LabelTy = new Type("label" , LabelTyID),
- *Type::LockTy = new Type("lock" , LockTyID);
+Type *Type::VoidTy = new Type("void" , VoidTyID),
+ *Type::BoolTy = new Type("bool" , BoolTyID),
+ *Type::SByteTy = new SignedIntType("sbyte" , SByteTyID, 1),
+ *Type::UByteTy = new UnsignedIntType("ubyte" , UByteTyID, 1),
+ *Type::ShortTy = new SignedIntType("short" , ShortTyID, 2),
+ *Type::UShortTy = new UnsignedIntType("ushort", UShortTyID, 2),
+ *Type::IntTy = new SignedIntType("int" , IntTyID, 4),
+ *Type::UIntTy = new UnsignedIntType("uint" , UIntTyID, 4),
+ *Type::LongTy = new SignedIntType("long" , LongTyID, 8),
+ *Type::ULongTy = new UnsignedIntType("ulong" , ULongTyID, 8),
+ *Type::FloatTy = new Type("float" , FloatTyID),
+ *Type::DoubleTy = new Type("double", DoubleTyID),
+ *Type::TypeTy = &TheTypeType,
+ *Type::LabelTy = new Type("label" , LabelTyID);
//===----------------------------------------------------------------------===//
-// Derived Type Implementations
+// Derived Type Constructors
//===----------------------------------------------------------------------===//
-// Make sure that only one instance of a particular type may be created on any
-// given run of the compiler...
-//
-// TODO: This list should be kept in sorted order so that we can do a binary
-// TODO: search instead of linear search!
-//
-// TODO: This should be templatized so that every derived type can use the same
-// TODO: code!
-//
-#define TEST_MERGE_TYPES 0
+FunctionType::FunctionType(const Type *Result,
+ const vector<const Type*> &Params,
+ bool IsVarArgs) : DerivedType(FunctionTyID),
+ ResultType(PATypeHandle<Type>(Result, this)),
+ isVarArgs(IsVarArgs) {
+ ParamTys.reserve(Params.size());
+ for (unsigned i = 0; i < Params.size(); ++i)
+ ParamTys.push_back(PATypeHandle<Type>(Params[i], this));
-#if TEST_MERGE_TYPES
-#include "llvm/Assembly/Writer.h"
+ setDerivedTypeProperties();
+}
+
+StructType::StructType(const vector<const Type*> &Types)
+ : CompositeType(StructTyID) {
+ ETypes.reserve(Types.size());
+ for (unsigned i = 0; i < Types.size(); ++i) {
+ assert(Types[i] != Type::VoidTy && "Void type in method prototype!!");
+ ETypes.push_back(PATypeHandle<Type>(Types[i], this));
+ }
+ setDerivedTypeProperties();
+}
+
+ArrayType::ArrayType(const Type *ElType, unsigned NumEl)
+ : SequentialType(ArrayTyID, ElType) {
+ NumElements = NumEl;
+ setDerivedTypeProperties();
+}
+
+PointerType::PointerType(const Type *E) : SequentialType(PointerTyID, E) {
+ setDerivedTypeProperties();
+}
+
+OpaqueType::OpaqueType() : DerivedType(OpaqueTyID) {
+ setAbstract(true);
+ setDescription("opaque"+utostr(getUniqueID()));
+#ifdef DEBUG_MERGE_TYPES
+ cerr << "Derived new type: " << getDescription() << endl;
#endif
+}
+
+
+
//===----------------------------------------------------------------------===//
-// Derived Type Constructors
+// Derived Type setDerivedTypeProperties Function
//===----------------------------------------------------------------------===//
-MethodType::MethodType(const Type *Result, const vector<const Type*> &Params,
- const string &Name)
- : Type(Name, MethodTyID), ResultType(Result), ParamTys(Params) {
+// getTypeProps - This is a recursive function that walks a type hierarchy
+// calculating the description for a type and whether or not it is abstract or
+// recursive. Worst case it will have to do a lot of traversing if you have
+// some whacko opaque types, but in most cases, it will do some simple stuff
+// when it hits non-abstract types that aren't recursive.
+//
+static string getTypeProps(const Type *Ty, vector<const Type *> &TypeStack,
+ bool &isAbstract, bool &isRecursive) {
+ string Result;
+ if (!Ty->isAbstract() && !Ty->isRecursive() && // Base case for the recursion
+ Ty->getDescription().size()) {
+ Result = Ty->getDescription(); // Primitive = leaf type
+ } else if (isa<OpaqueType>(Ty)) { // Base case for the recursion
+ Result = Ty->getDescription(); // Opaque = leaf type
+ isAbstract = true; // This whole type is abstract!
+ } else {
+ // Check to see if the Type is already on the stack...
+ unsigned Slot = 0, CurSize = TypeStack.size();
+ while (Slot < CurSize && TypeStack[Slot] != Ty) ++Slot; // Scan for type
+
+ // This is another base case for the recursion. In this case, we know
+ // that we have looped back to a type that we have previously visited.
+ // Generate the appropriate upreference to handle this.
+ //
+ if (Slot < CurSize) {
+ Result = "\\" + utostr(CurSize-Slot); // Here's the upreference
+ isRecursive = true; // We know we are recursive
+ } else { // Recursive case: abstract derived type...
+ TypeStack.push_back(Ty); // Add us to the stack..
+
+ switch (Ty->getPrimitiveID()) {
+ case Type::FunctionTyID: {
+ const FunctionType *MTy = cast<const FunctionType>(Ty);
+ Result = getTypeProps(MTy->getReturnType(), TypeStack,
+ isAbstract, isRecursive)+" (";
+ for (FunctionType::ParamTypes::const_iterator
+ I = MTy->getParamTypes().begin(),
+ E = MTy->getParamTypes().end(); I != E; ++I) {
+ if (I != MTy->getParamTypes().begin())
+ Result += ", ";
+ Result += getTypeProps(*I, TypeStack, isAbstract, isRecursive);
+ }
+ if (MTy->isVarArg()) {
+ if (!MTy->getParamTypes().empty()) Result += ", ";
+ Result += "...";
+ }
+ Result += ")";
+ break;
+ }
+ case Type::StructTyID: {
+ const StructType *STy = cast<const StructType>(Ty);
+ Result = "{ ";
+ for (StructType::ElementTypes::const_iterator
+ I = STy->getElementTypes().begin(),
+ E = STy->getElementTypes().end(); I != E; ++I) {
+ if (I != STy->getElementTypes().begin())
+ Result += ", ";
+ Result += getTypeProps(*I, TypeStack, isAbstract, isRecursive);
+ }
+ Result += " }";
+ break;
+ }
+ case Type::PointerTyID: {
+ const PointerType *PTy = cast<const PointerType>(Ty);
+ Result = getTypeProps(PTy->getElementType(), TypeStack,
+ isAbstract, isRecursive) + " *";
+ break;
+ }
+ case Type::ArrayTyID: {
+ const ArrayType *ATy = cast<const ArrayType>(Ty);
+ unsigned NumElements = ATy->getNumElements();
+ Result = "[";
+ Result += utostr(NumElements) + " x ";
+ Result += getTypeProps(ATy->getElementType(), TypeStack,
+ isAbstract, isRecursive) + "]";
+ break;
+ }
+ default:
+ assert(0 && "Unhandled case in getTypeProps!");
+ Result = "<error>";
+ }
+
+ TypeStack.pop_back(); // Remove self from stack...
+ }
+ }
+ return Result;
}
-ArrayType::ArrayType(const Type *ElType, int NumEl, const string &Name)
- : Type(Name, ArrayTyID), ElementType(ElType) {
- NumElements = NumEl;
+
+// setDerivedTypeProperties - This function is used to calculate the
+// isAbstract, isRecursive, and the Description settings for a type. The
+// getTypeProps function does all the dirty work.
+//
+void DerivedType::setDerivedTypeProperties() {
+ vector<const Type *> TypeStack;
+ bool isAbstract = false, isRecursive = false;
+
+ setDescription(getTypeProps(this, TypeStack, isAbstract, isRecursive));
+ setAbstract(isAbstract);
+ setRecursive(isRecursive);
}
-StructType::StructType(const vector<const Type*> &Types, const string &Name)
- : Type(Name, StructTyID),
- ETypes(Types),
- layoutCache(new StructSizeAndOffsetInfo)
-{
- ResetCachedInfo();
+
+//===----------------------------------------------------------------------===//
+// Type Structural Equality Testing
+//===----------------------------------------------------------------------===//
+
+// TypesEqual - Two types are considered structurally equal if they have the
+// same "shape": Every level and element of the types have identical primitive
+// ID's, and the graphs have the same edges/nodes in them. Nodes do not have to
+// be pointer equals to be equivalent though. This uses an optimistic algorithm
+// that assumes that two graphs are the same until proven otherwise.
+//
+static bool TypesEqual(const Type *Ty, const Type *Ty2,
+ map<const Type *, const Type *> &EqTypes) {
+ if (Ty == Ty2) return true;
+ if (Ty->getPrimitiveID() != Ty2->getPrimitiveID()) return false;
+ if (Ty->isPrimitiveType()) return true;
+ if (isa<OpaqueType>(Ty))
+ return false; // Two nonequal opaque types are never equal
+
+ map<const Type*, const Type*>::iterator It = EqTypes.find(Ty);
+ if (It != EqTypes.end())
+ return It->second == Ty2; // Looping back on a type, check for equality
+
+ // Otherwise, add the mapping to the table to make sure we don't get
+ // recursion on the types...
+ EqTypes.insert(make_pair(Ty, Ty2));
+
+ // Iterate over the types and make sure the the contents are equivalent...
+ Type::subtype_iterator I = Ty ->subtype_begin(), IE = Ty ->subtype_end();
+ Type::subtype_iterator I2 = Ty2->subtype_begin(), IE2 = Ty2->subtype_end();
+ for (; I != IE && I2 != IE2; ++I, ++I2)
+ if (!TypesEqual(*I, *I2, EqTypes)) return false;
+
+ // Two really annoying special cases that breaks an otherwise nice simple
+ // algorithm is the fact that arraytypes have sizes that differentiates types,
+ // and that method types can be varargs or not. Consider this now.
+ if (const ArrayType *ATy = dyn_cast<ArrayType>(Ty)) {
+ if (ATy->getNumElements() != cast<const ArrayType>(Ty2)->getNumElements())
+ return false;
+ } else if (const FunctionType *MTy = dyn_cast<FunctionType>(Ty)) {
+ if (MTy->isVarArg() != cast<const FunctionType>(Ty2)->isVarArg())
+ return false;
+ }
+
+ return I == IE && I2 == IE2; // Types equal if both iterators are done
}
-PointerType::PointerType(const Type *E)
- : Type(E->getName() + " *", PointerTyID), ValueType(E) {
+static bool TypesEqual(const Type *Ty, const Type *Ty2) {
+ map<const Type *, const Type *> EqTypes;
+ return TypesEqual(Ty, Ty2, EqTypes);
}
+
+
//===----------------------------------------------------------------------===//
-// Derived Type Creator Functions
+// Derived Type Factory Functions
//===----------------------------------------------------------------------===//
-const MethodType *MethodType::getMethodType(const Type *ReturnType,
- const vector<const Type*> &Params) {
- static vector<const MethodType*> ExistingMethodTypesCache;
- for (unsigned i = 0; i < ExistingMethodTypesCache.size(); ++i) {
- const MethodType *T = ExistingMethodTypesCache[i];
- if (T->getReturnType() == ReturnType) {
- const ParamTypes &EParams = T->getParamTypes();
- ParamTypes::const_iterator I = Params.begin();
- ParamTypes::const_iterator J = EParams.begin();
- for (; I != Params.end() && J != EParams.end(); ++I, ++J)
- if (*I != *J) break; // These types aren't equal!
-
- if (I == Params.end() && J == EParams.end()) {
-#if TEST_MERGE_TYPES == 2
- ostream_iterator<const Type*> out(cerr, ", ");
- cerr << "Type: \"";
- copy(Params.begin(), Params.end(), out);
- cerr << "\"\nEquals: \"";
- copy(EParams.begin(), EParams.end(), out);
- cerr << "\"" << endl;
+// TypeMap - Make sure that only one instance of a particular type may be
+// created on any given run of the compiler... note that this involves updating
+// our map if an abstract type gets refined somehow...
+//
+template<class ValType, class TypeClass>
+class TypeMap : public AbstractTypeUser {
+ typedef map<ValType, PATypeHandle<TypeClass> > MapTy;
+ MapTy Map;
+public:
+ ~TypeMap() { print("ON EXIT"); }
+
+ inline TypeClass *get(const ValType &V) {
+ typename map<ValType, PATypeHandle<TypeClass> >::iterator I = Map.find(V);
+ // TODO: FIXME: When Types are not CONST.
+ return (I != Map.end()) ? (TypeClass*)I->second.get() : 0;
+ }
+
+ inline void add(const ValType &V, TypeClass *T) {
+ Map.insert(make_pair(V, PATypeHandle<TypeClass>(T, this)));
+ print("add");
+ }
+
+ // containsEquivalent - Return true if the typemap contains a type that is
+ // structurally equivalent to the specified type.
+ //
+ inline const TypeClass *containsEquivalent(const TypeClass *Ty) {
+ for (typename MapTy::iterator I = Map.begin(), E = Map.end(); I != E; ++I)
+ if (I->second.get() != Ty && TypesEqual(Ty, I->second.get()))
+ return (TypeClass*)I->second.get(); // FIXME TODO when types not const
+ return 0;
+ }
+
+ // refineAbstractType - This is called when one of the contained abstract
+ // types gets refined... this simply removes the abstract type from our table.
+ // We expect that whoever refined the type will add it back to the table,
+ // corrected.
+ //
+ virtual void refineAbstractType(const DerivedType *OldTy, const Type *NewTy) {
+#ifdef DEBUG_MERGE_TYPES
+ cerr << "Removing Old type from Tab: " << (void*)OldTy << ", "
+ << OldTy->getDescription() << " replacement == " << (void*)NewTy
+ << ", " << NewTy->getDescription() << endl;
#endif
- return T;
+ for (typename MapTy::iterator I = Map.begin(), E = Map.end(); I != E; ++I)
+ if (I->second == OldTy) {
+ // Check to see if the type just became concrete. If so, remove self
+ // from user list.
+ I->second.removeUserFromConcrete();
+ I->second = cast<TypeClass>(NewTy);
}
- }
- }
-#if TEST_MERGE_TYPES == 2
- ostream_iterator<const Type*> out(cerr, ", ");
- cerr << "Input Types: ";
- copy(Params.begin(), Params.end(), out);
- cerr << endl;
-#endif
+ }
- // Calculate the string name for the new type...
- string Name = ReturnType->getName() + " (";
- for (ParamTypes::const_iterator I = Params.begin();
- I != Params.end(); ++I) {
- if (I != Params.begin())
- Name += ", ";
- Name += (*I)->getName();
+ void remove(const ValType &OldVal) {
+ typename MapTy::iterator I = Map.find(OldVal);
+ assert(I != Map.end() && "TypeMap::remove, element not found!");
+ Map.erase(I);
}
- Name += ")";
-#if TEST_MERGE_TYPES
- cerr << "Derived new type: " << Name << endl;
+ void print(const char *Arg) const {
+#ifdef DEBUG_MERGE_TYPES
+ cerr << "TypeMap<>::" << Arg << " table contents:\n";
+ unsigned i = 0;
+ for (MapTy::const_iterator I = Map.begin(), E = Map.end(); I != E; ++I)
+ cerr << " " << (++i) << ". " << I->second << " "
+ << I->second->getDescription() << endl;
#endif
+ }
- MethodType *Result = new MethodType(ReturnType, Params, Name);
- ExistingMethodTypesCache.push_back(Result);
- return Result;
+ void dump() const { print("dump output"); }
+};
+
+
+// ValTypeBase - This is the base class that is used by the various
+// instantiations of TypeMap. This class is an AbstractType user that notifies
+// the underlying TypeMap when it gets modified.
+//
+template<class ValType, class TypeClass>
+class ValTypeBase : public AbstractTypeUser {
+ TypeMap<ValType, TypeClass> &MyTable;
+protected:
+ inline ValTypeBase(TypeMap<ValType, TypeClass> &tab) : MyTable(tab) {}
+
+ // Subclass should override this... to update self as usual
+ virtual void doRefinement(const DerivedType *OldTy, const Type *NewTy) = 0;
+
+ // typeBecameConcrete - This callback occurs when a contained type refines
+ // to itself, but becomes concrete in the process. Our subclass should remove
+ // itself from the ATU list of the specified type.
+ //
+ virtual void typeBecameConcrete(const DerivedType *Ty) = 0;
+
+ virtual void refineAbstractType(const DerivedType *OldTy, const Type *NewTy) {
+ assert(OldTy == NewTy || OldTy->isAbstract());
+
+ if (!OldTy->isAbstract())
+ typeBecameConcrete(OldTy);
+
+ TypeMap<ValType, TypeClass> &Table = MyTable; // Copy MyTable reference
+ ValType Tmp(*(ValType*)this); // Copy this.
+ PATypeHandle<TypeClass> OldType(Table.get(*(ValType*)this), this);
+ Table.remove(*(ValType*)this); // Destroy's this!
+
+ // Refine temporary to new state...
+ if (OldTy != NewTy)
+ Tmp.doRefinement(OldTy, NewTy);
+
+ // FIXME: when types are not const!
+ Table.add((ValType&)Tmp, (TypeClass*)OldType.get());
+ }
+
+ void dump() const {
+ cerr << "ValTypeBase instance!\n";
+ }
+};
+
+
+
+//===----------------------------------------------------------------------===//
+// Function Type Factory and Value Class...
+//
+
+// FunctionValType - Define a class to hold the key that goes into the TypeMap
+//
+class FunctionValType : public ValTypeBase<FunctionValType, FunctionType> {
+ PATypeHandle<Type> RetTy;
+ vector<PATypeHandle<Type> > ArgTypes;
+ bool isVarArg;
+public:
+ FunctionValType(const Type *ret, const vector<const Type*> &args,
+ bool IVA, TypeMap<FunctionValType, FunctionType> &Tab)
+ : ValTypeBase<FunctionValType, FunctionType>(Tab), RetTy(ret, this),
+ isVarArg(IVA) {
+ for (unsigned i = 0; i < args.size(); ++i)
+ ArgTypes.push_back(PATypeHandle<Type>(args[i], this));
+ }
+
+ // We *MUST* have an explicit copy ctor so that the TypeHandles think that
+ // this FunctionValType owns them, not the old one!
+ //
+ FunctionValType(const FunctionValType &MVT)
+ : ValTypeBase<FunctionValType, FunctionType>(MVT), RetTy(MVT.RetTy, this),
+ isVarArg(MVT.isVarArg) {
+ ArgTypes.reserve(MVT.ArgTypes.size());
+ for (unsigned i = 0; i < MVT.ArgTypes.size(); ++i)
+ ArgTypes.push_back(PATypeHandle<Type>(MVT.ArgTypes[i], this));
+ }
+
+ // Subclass should override this... to update self as usual
+ virtual void doRefinement(const DerivedType *OldType, const Type *NewType) {
+ if (RetTy == OldType) RetTy = NewType;
+ for (unsigned i = 0, e = ArgTypes.size(); i != e; ++i)
+ if (ArgTypes[i] == OldType) ArgTypes[i] = NewType;
+ }
+
+ virtual void typeBecameConcrete(const DerivedType *Ty) {
+ if (RetTy == Ty) RetTy.removeUserFromConcrete();
+
+ for (unsigned i = 0; i < ArgTypes.size(); ++i)
+ if (ArgTypes[i] == Ty) ArgTypes[i].removeUserFromConcrete();
+ }
+
+ inline bool operator<(const FunctionValType &MTV) const {
+ if (RetTy.get() < MTV.RetTy.get()) return true;
+ if (RetTy.get() > MTV.RetTy.get()) return false;
+
+ if (ArgTypes < MTV.ArgTypes) return true;
+ return (ArgTypes == MTV.ArgTypes) && isVarArg < MTV.isVarArg;
+ }
+};
+
+// Define the actual map itself now...
+static TypeMap<FunctionValType, FunctionType> FunctionTypes;
+
+// FunctionType::get - The factory function for the FunctionType class...
+FunctionType *FunctionType::get(const Type *ReturnType,
+ const vector<const Type*> &Params,
+ bool isVarArg) {
+ FunctionValType VT(ReturnType, Params, isVarArg, FunctionTypes);
+ FunctionType *MT = FunctionTypes.get(VT);
+ if (MT) return MT;
+
+ FunctionTypes.add(VT, MT = new FunctionType(ReturnType, Params, isVarArg));
+
+#ifdef DEBUG_MERGE_TYPES
+ cerr << "Derived new type: " << MT << endl;
+#endif
+ return MT;
}
+//===----------------------------------------------------------------------===//
+// Array Type Factory...
+//
+class ArrayValType : public ValTypeBase<ArrayValType, ArrayType> {
+ PATypeHandle<Type> ValTy;
+ unsigned Size;
+public:
+ ArrayValType(const Type *val, int sz, TypeMap<ArrayValType, ArrayType> &Tab)
+ : ValTypeBase<ArrayValType, ArrayType>(Tab), ValTy(val, this), Size(sz) {}
-const ArrayType *ArrayType::getArrayType(const Type *ElementType,
- int NumElements = -1) {
+ // We *MUST* have an explicit copy ctor so that the ValTy thinks that this
+ // ArrayValType owns it, not the old one!
+ //
+ ArrayValType(const ArrayValType &AVT)
+ : ValTypeBase<ArrayValType, ArrayType>(AVT), ValTy(AVT.ValTy, this),
+ Size(AVT.Size) {}
+
+ // Subclass should override this... to update self as usual
+ virtual void doRefinement(const DerivedType *OldType, const Type *NewType) {
+ assert(ValTy == OldType);
+ ValTy = NewType;
+ }
+
+ virtual void typeBecameConcrete(const DerivedType *Ty) {
+ assert(ValTy == Ty &&
+ "Contained type became concrete but we're not using it!");
+ ValTy.removeUserFromConcrete();
+ }
+
+ inline bool operator<(const ArrayValType &MTV) const {
+ if (Size < MTV.Size) return true;
+ return Size == MTV.Size && ValTy.get() < MTV.ValTy.get();
+ }
+};
+
+static TypeMap<ArrayValType, ArrayType> ArrayTypes;
+
+ArrayType *ArrayType::get(const Type *ElementType, unsigned NumElements) {
assert(ElementType && "Can't get array of null types!");
- static vector<const ArrayType*> ExistingTypesCache;
- // Search cache for value...
- for (unsigned i = 0; i < ExistingTypesCache.size(); ++i) {
- const ArrayType *T = ExistingTypesCache[i];
+ ArrayValType AVT(ElementType, NumElements, ArrayTypes);
+ ArrayType *AT = ArrayTypes.get(AVT);
+ if (AT) return AT; // Found a match, return it!
+
+ // Value not found. Derive a new type!
+ ArrayTypes.add(AVT, AT = new ArrayType(ElementType, NumElements));
+
+#ifdef DEBUG_MERGE_TYPES
+ cerr << "Derived new type: " << AT->getDescription() << endl;
+#endif
+ return AT;
+}
+
+//===----------------------------------------------------------------------===//
+// Struct Type Factory...
+//
+
+// StructValType - Define a class to hold the key that goes into the TypeMap
+//
+class StructValType : public ValTypeBase<StructValType, StructType> {
+ vector<PATypeHandle<Type> > ElTypes;
+public:
+ StructValType(const vector<const Type*> &args,
+ TypeMap<StructValType, StructType> &Tab)
+ : ValTypeBase<StructValType, StructType>(Tab) {
+ ElTypes.reserve(args.size());
+ for (unsigned i = 0, e = args.size(); i != e; ++i)
+ ElTypes.push_back(PATypeHandle<Type>(args[i], this));
+ }
+
+ // We *MUST* have an explicit copy ctor so that the TypeHandles think that
+ // this StructValType owns them, not the old one!
+ //
+ StructValType(const StructValType &SVT)
+ : ValTypeBase<StructValType, StructType>(SVT){
+ ElTypes.reserve(SVT.ElTypes.size());
+ for (unsigned i = 0, e = SVT.ElTypes.size(); i != e; ++i)
+ ElTypes.push_back(PATypeHandle<Type>(SVT.ElTypes[i], this));
+ }
+
+ // Subclass should override this... to update self as usual
+ virtual void doRefinement(const DerivedType *OldType, const Type *NewType) {
+ for (unsigned i = 0; i < ElTypes.size(); ++i)
+ if (ElTypes[i] == OldType) ElTypes[i] = NewType;
+ }
+
+ virtual void typeBecameConcrete(const DerivedType *Ty) {
+ for (unsigned i = 0, e = ElTypes.size(); i != e; ++i)
+ if (ElTypes[i] == Ty)
+ ElTypes[i].removeUserFromConcrete();
+ }
- if (T->getElementType() == ElementType &&
- T->getNumElements() == NumElements)
- return T;
+ inline bool operator<(const StructValType &STV) const {
+ return ElTypes < STV.ElTypes;
}
+};
+
+static TypeMap<StructValType, StructType> StructTypes;
+
+StructType *StructType::get(const vector<const Type*> &ETypes) {
+ StructValType STV(ETypes, StructTypes);
+ StructType *ST = StructTypes.get(STV);
+ if (ST) return ST;
// Value not found. Derive a new type!
- string Name = "[";
- if (NumElements != -1) Name += itostr(NumElements) + " x ";
+ StructTypes.add(STV, ST = new StructType(ETypes));
- Name += ElementType->getName();
-
- ArrayType *Result = new ArrayType(ElementType, NumElements, Name + "]");
- ExistingTypesCache.push_back(Result);
+#ifdef DEBUG_MERGE_TYPES
+ cerr << "Derived new type: " << ST->getDescription() << endl;
+#endif
+ return ST;
+}
-#if TEST_MERGE_TYPES
- cerr << "Derived new type: " << Result->getName() << endl;
+//===----------------------------------------------------------------------===//
+// Pointer Type Factory...
+//
+
+// PointerValType - Define a class to hold the key that goes into the TypeMap
+//
+class PointerValType : public ValTypeBase<PointerValType, PointerType> {
+ PATypeHandle<Type> ValTy;
+public:
+ PointerValType(const Type *val, TypeMap<PointerValType, PointerType> &Tab)
+ : ValTypeBase<PointerValType, PointerType>(Tab), ValTy(val, this) {}
+
+ // We *MUST* have an explicit copy ctor so that the ValTy thinks that this
+ // PointerValType owns it, not the old one!
+ //
+ PointerValType(const PointerValType &PVT)
+ : ValTypeBase<PointerValType, PointerType>(PVT), ValTy(PVT.ValTy, this) {}
+
+ // Subclass should override this... to update self as usual
+ virtual void doRefinement(const DerivedType *OldType, const Type *NewType) {
+ assert(ValTy == OldType);
+ ValTy = NewType;
+ }
+
+ virtual void typeBecameConcrete(const DerivedType *Ty) {
+ assert(ValTy == Ty &&
+ "Contained type became concrete but we're not using it!");
+ ValTy.removeUserFromConcrete();
+ }
+
+ inline bool operator<(const PointerValType &MTV) const {
+ return ValTy.get() < MTV.ValTy.get();
+ }
+};
+
+static TypeMap<PointerValType, PointerType> PointerTypes;
+
+PointerType *PointerType::get(const Type *ValueType) {
+ assert(ValueType && "Can't get a pointer to <null> type!");
+ PointerValType PVT(ValueType, PointerTypes);
+
+ PointerType *PT = PointerTypes.get(PVT);
+ if (PT) return PT;
+
+ // Value not found. Derive a new type!
+ PointerTypes.add(PVT, PT = new PointerType(ValueType));
+
+#ifdef DEBUG_MERGE_TYPES
+ cerr << "Derived new type: " << PT->getDescription() << endl;
#endif
- return Result;
+ return PT;
+}
+
+void debug_type_tables() {
+ FunctionTypes.dump();
+ ArrayTypes.dump();
+ StructTypes.dump();
+ PointerTypes.dump();
}
-const StructType *StructType::getStructType(const ElementTypes &ETypes) {
- static vector<const StructType*> ExistingStructTypesCache;
- for (unsigned i = 0; i < ExistingStructTypesCache.size(); ++i) {
- const StructType *T = ExistingStructTypesCache[i];
+//===----------------------------------------------------------------------===//
+// Derived Type Refinement Functions
+//===----------------------------------------------------------------------===//
- const ElementTypes &Elements = T->getElementTypes();
- ElementTypes::const_iterator I = ETypes.begin();
- ElementTypes::const_iterator J = Elements.begin();
- for (; I != ETypes.end() && J != Elements.end(); ++I, ++J)
- if (*I != *J) break; // These types aren't equal!
+// addAbstractTypeUser - Notify an abstract type that there is a new user of
+// it. This function is called primarily by the PATypeHandle class.
+//
+void DerivedType::addAbstractTypeUser(AbstractTypeUser *U) const {
+ assert(isAbstract() && "addAbstractTypeUser: Current type not abstract!");
+
+#if DEBUG_MERGE_TYPES
+ cerr << " addAbstractTypeUser[" << (void*)this << ", " << getDescription()
+ << "][" << AbstractTypeUsers.size() << "] User = " << U << endl;
+#endif
+ AbstractTypeUsers.push_back(U);
+}
+
+
+// removeAbstractTypeUser - Notify an abstract type that a user of the class
+// no longer has a handle to the type. This function is called primarily by
+// the PATypeHandle class. When there are no users of the abstract type, it
+// is anihilated, because there is no way to get a reference to it ever again.
+//
+void DerivedType::removeAbstractTypeUser(AbstractTypeUser *U) const {
+ // Search from back to front because we will notify users from back to
+ // front. Also, it is likely that there will be a stack like behavior to
+ // users that register and unregister users.
+ //
+ unsigned i;
+ for (i = AbstractTypeUsers.size(); AbstractTypeUsers[i-1] != U; --i)
+ assert(i != 0 && "AbstractTypeUser not in user list!");
+
+ --i; // Convert to be in range 0 <= i < size()
+ assert(i < AbstractTypeUsers.size() && "Index out of range!"); // Wraparound?
+
+ AbstractTypeUsers.erase(AbstractTypeUsers.begin()+i);
+
+#ifdef DEBUG_MERGE_TYPES
+ cerr << " remAbstractTypeUser[" << (void*)this << ", "
+ << getDescription() << "][" << i << "] User = " << U << endl;
+#endif
- if (I == ETypes.end() && J == Elements.end()) {
-#if TEST_MERGE_TYPES == 2
- ostream_iterator<const Type*> out(cerr, ", ");
- cerr << "Type: \"";
- copy(ETypes.begin(), ETypes.end(), out);
- cerr << "\"\nEquals: \"";
- copy(Elements.begin(), Elements.end(), out);
- cerr << "\"" << endl;
+ if (AbstractTypeUsers.empty() && isAbstract()) {
+#ifdef DEBUG_MERGE_TYPES
+ cerr << "DELETEing unused abstract type: <" << getDescription()
+ << ">[" << (void*)this << "]" << endl;
#endif
- return T;
+ delete this; // No users of this abstract type!
+ }
+}
+
+
+// refineAbstractTypeTo - This function is used to when it is discovered that
+// the 'this' abstract type is actually equivalent to the NewType specified.
+// This causes all users of 'this' to switch to reference the more concrete
+// type NewType and for 'this' to be deleted.
+//
+void DerivedType::refineAbstractTypeTo(const Type *NewType) {
+ assert(isAbstract() && "refineAbstractTypeTo: Current type is not abstract!");
+ assert(this != NewType && "Can't refine to myself!");
+
+#ifdef DEBUG_MERGE_TYPES
+ cerr << "REFINING abstract type [" << (void*)this << " " << getDescription()
+ << "] to [" << (void*)NewType << " " << NewType->getDescription()
+ << "]!\n";
+#endif
+
+
+ // Make sure to put the type to be refined to into a holder so that if IT gets
+ // refined, that we will not continue using a dead reference...
+ //
+ PATypeHolder NewTy(NewType);
+
+ // Add a self use of the current type so that we don't delete ourself until
+ // after this while loop. We are careful to never invoke refine on ourself,
+ // so this extra reference shouldn't be a problem. Note that we must only
+ // remove a single reference at the end, but we must tolerate multiple self
+ // references because we could be refineAbstractTypeTo'ing recursively on the
+ // same type.
+ //
+ addAbstractTypeUser(this);
+
+ // Count the number of self uses. Stop looping when sizeof(list) == NSU.
+ unsigned NumSelfUses = 0;
+
+ // Iterate over all of the uses of this type, invoking callback. Each user
+ // should remove itself from our use list automatically. We have to check to
+ // make sure that NewTy doesn't _become_ 'this'. If it does, resolving types
+ // will not cause users to drop off of the use list. If we resolve to ourself
+ // we succeed!
+ //
+ while (AbstractTypeUsers.size() > NumSelfUses && NewTy != this) {
+ AbstractTypeUser *User = AbstractTypeUsers.back();
+
+ if (User == this) {
+ // Move self use to the start of the list. Increment NSU.
+ swap(AbstractTypeUsers.back(), AbstractTypeUsers[NumSelfUses++]);
+ } else {
+ unsigned OldSize = AbstractTypeUsers.size();
+#ifdef DEBUG_MERGE_TYPES
+ cerr << " REFINING user " << OldSize-1 << "[" << (void*)User
+ << "] of abstract type ["
+ << (void*)this << " " << getDescription() << "] to ["
+ << (void*)NewTy.get() << " " << NewTy->getDescription() << "]!\n";
+#endif
+ User->refineAbstractType(this, NewTy);
+
+#ifdef DEBUG_MERGE_TYPES
+ if (AbstractTypeUsers.size() == OldSize) {
+ User->refineAbstractType(this, NewTy);
+ if (AbstractTypeUsers.back() != User)
+ cerr << "User changed!\n";
+ cerr << "Top of user list is:\n";
+ AbstractTypeUsers.back()->dump();
+
+ cerr <<"\nOld User=\n";
+ User->dump();
+ }
+#endif
+ assert(AbstractTypeUsers.size() != OldSize &&
+ "AbsTyUser did not remove self from user list!");
}
}
-#if TEST_MERGE_TYPES == 2
- ostream_iterator<const Type*> out(cerr, ", ");
- cerr << "Input Types: ";
- copy(ETypes.begin(), ETypes.end(), out);
- cerr << endl;
+ // Remove a single self use, even though there may be several here. This will
+ // probably 'delete this', so no instance variables may be used after this
+ // occurs...
+ //
+ assert((NewTy == this || AbstractTypeUsers.back() == this) &&
+ "Only self uses should be left!");
+ removeAbstractTypeUser(this);
+}
+
+// typeIsRefined - Notify AbstractTypeUsers of this type that the current type
+// has been refined a bit. The pointer is still valid and still should be
+// used, but the subtypes have changed.
+//
+void DerivedType::typeIsRefined() {
+ assert(isRefining >= 0 && isRefining <= 2 && "isRefining out of bounds!");
+ if (isRefining == 1) return; // Kill recursion here...
+ ++isRefining;
+
+#ifdef DEBUG_MERGE_TYPES
+ cerr << "typeIsREFINED type: " << (void*)this <<" "<<getDescription() << "\n";
#endif
- // Calculate the string name for the new type...
- string Name = "{ ";
- for (ElementTypes::const_iterator I = ETypes.begin();
- I != ETypes.end(); ++I) {
- if (I != ETypes.begin())
- Name += ", ";
- Name += (*I)->getName();
+ // In this loop we have to be very careful not to get into infinite loops and
+ // other problem cases. Specifically, we loop through all of the abstract
+ // type users in the user list, notifying them that the type has been refined.
+ // At their choice, they may or may not choose to remove themselves from the
+ // list of users. Regardless of whether they do or not, we have to be sure
+ // that we only notify each user exactly once. Because the refineAbstractType
+ // method can cause an arbitrary permutation to the user list, we cannot loop
+ // through it in any particular order and be guaranteed that we will be
+ // successful at this aim. Because of this, we keep track of all the users we
+ // have visited and only visit users we have not seen. Because this user list
+ // should be small, we use a vector instead of a full featured set to keep
+ // track of what users we have notified so far.
+ //
+ vector<AbstractTypeUser*> Refined;
+ while (1) {
+ unsigned i;
+ for (i = AbstractTypeUsers.size(); i != 0; --i)
+ if (find(Refined.begin(), Refined.end(), AbstractTypeUsers[i-1]) ==
+ Refined.end())
+ break; // Found an unrefined user?
+
+ if (i == 0) break; // Noone to refine left, break out of here!
+
+ AbstractTypeUser *ATU = AbstractTypeUsers[--i];
+ Refined.push_back(ATU); // Keep track of which users we have refined!
+
+#ifdef DEBUG_MERGE_TYPES
+ cerr << " typeIsREFINED user " << i << "[" << ATU << "] of abstract type ["
+ << (void*)this << " " << getDescription() << "]\n";
+#endif
+ ATU->refineAbstractType(this, this);
}
- Name += " }";
-#if TEST_MERGE_TYPES
- cerr << "Derived new type: " << Name << endl;
+ --isRefining;
+
+#ifndef _NDEBUG
+ if (!(isAbstract() || AbstractTypeUsers.empty()))
+ for (unsigned i = 0; i < AbstractTypeUsers.size(); ++i) {
+ if (AbstractTypeUsers[i] != this) {
+ // Debugging hook
+ cerr << "FOUND FAILURE\nUser: ";
+ AbstractTypeUsers[i]->dump();
+ cerr << "\nCatch:\n";
+ AbstractTypeUsers[i]->refineAbstractType(this, this);
+ assert(0 && "Type became concrete,"
+ " but it still has abstract type users hanging around!");
+ }
+ }
#endif
+}
+
- StructType *Result = new StructType(ETypes, Name);
- ExistingStructTypesCache.push_back(Result);
- return Result;
+
+
+// refineAbstractType - Called when a contained type is found to be more
+// concrete - this could potentially change us from an abstract type to a
+// concrete type.
+//
+void FunctionType::refineAbstractType(const DerivedType *OldType,
+ const Type *NewType) {
+#ifdef DEBUG_MERGE_TYPES
+ cerr << "FunctionTy::refineAbstractTy(" << (void*)OldType << "["
+ << OldType->getDescription() << "], " << (void*)NewType << " ["
+ << NewType->getDescription() << "])\n";
+#endif
+ // Find the type element we are refining...
+ if (ResultType == OldType) {
+ ResultType.removeUserFromConcrete();
+ ResultType = NewType;
+ }
+ for (unsigned i = 0, e = ParamTys.size(); i != e; ++i)
+ if (ParamTys[i] == OldType) {
+ ParamTys[i].removeUserFromConcrete();
+ ParamTys[i] = NewType;
+ }
+
+ const FunctionType *MT = FunctionTypes.containsEquivalent(this);
+ if (MT && MT != this) {
+ refineAbstractTypeTo(MT); // Different type altogether...
+ } else {
+ setDerivedTypeProperties(); // Update the name and isAbstract
+ typeIsRefined(); // Same type, different contents...
+ }
}
-const PointerType *PointerType::getPointerType(const Type *ValueType) {
- assert(ValueType && "Can't get a pointer to <null> type!");
- static vector<const PointerType*> ExistingTypesCache;
+// refineAbstractType - Called when a contained type is found to be more
+// concrete - this could potentially change us from an abstract type to a
+// concrete type.
+//
+void ArrayType::refineAbstractType(const DerivedType *OldType,
+ const Type *NewType) {
+#ifdef DEBUG_MERGE_TYPES
+ cerr << "ArrayTy::refineAbstractTy(" << (void*)OldType << "["
+ << OldType->getDescription() << "], " << (void*)NewType << " ["
+ << NewType->getDescription() << "])\n";
+#endif
- // Search cache for value...
- for (unsigned i = 0; i < ExistingTypesCache.size(); ++i) {
- const PointerType *T = ExistingTypesCache[i];
+ assert(getElementType() == OldType);
+ ElementType.removeUserFromConcrete();
+ ElementType = NewType;
- if (T->getValueType() == ValueType)
- return T;
+ const ArrayType *AT = ArrayTypes.containsEquivalent(this);
+ if (AT && AT != this) {
+ refineAbstractTypeTo(AT); // Different type altogether...
+ } else {
+ setDerivedTypeProperties(); // Update the name and isAbstract
+ typeIsRefined(); // Same type, different contents...
}
+}
- PointerType *Result = new PointerType(ValueType);
- ExistingTypesCache.push_back(Result);
-#if TEST_MERGE_TYPES
- cerr << "Derived new type: " << Result->getName() << endl;
+// refineAbstractType - Called when a contained type is found to be more
+// concrete - this could potentially change us from an abstract type to a
+// concrete type.
+//
+void StructType::refineAbstractType(const DerivedType *OldType,
+ const Type *NewType) {
+#ifdef DEBUG_MERGE_TYPES
+ cerr << "StructTy::refineAbstractTy(" << (void*)OldType << "["
+ << OldType->getDescription() << "], " << (void*)NewType << " ["
+ << NewType->getDescription() << "])\n";
#endif
- return Result;
+ for (unsigned i = 0, e = ETypes.size(); i != e; ++i)
+ if (ETypes[i] == OldType) {
+ ETypes[i].removeUserFromConcrete();
+
+ // Update old type to new type in the array...
+ ETypes[i] = NewType;
+ }
+
+ const StructType *ST = StructTypes.containsEquivalent(this);
+ if (ST && ST != this) {
+ refineAbstractTypeTo(ST); // Different type altogether...
+ } else {
+ setDerivedTypeProperties(); // Update the name and isAbstract
+ typeIsRefined(); // Same type, different contents...
+ }
+}
+
+// refineAbstractType - Called when a contained type is found to be more
+// concrete - this could potentially change us from an abstract type to a
+// concrete type.
+//
+void PointerType::refineAbstractType(const DerivedType *OldType,
+ const Type *NewType) {
+#ifdef DEBUG_MERGE_TYPES
+ cerr << "PointerTy::refineAbstractTy(" << (void*)OldType << "["
+ << OldType->getDescription() << "], " << (void*)NewType << " ["
+ << NewType->getDescription() << "])\n";
+#endif
+
+ assert(ElementType == OldType);
+ ElementType.removeUserFromConcrete();
+ ElementType = NewType;
+
+ const PointerType *PT = PointerTypes.containsEquivalent(this);
+ if (PT && PT != this) {
+ refineAbstractTypeTo(PT); // Different type altogether...
+ } else {
+ setDerivedTypeProperties(); // Update the name and isAbstract
+ typeIsRefined(); // Same type, different contents...
+ }
}
projects / oota-llvm.git / blobdiff