mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-19 04:29:21 +00:00
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7253 91177308-0d34-0410-b5e6-96231b3b80d8
1102 lines
40 KiB
C++
1102 lines
40 KiB
C++
//===-- Type.cpp - Implement the Type class ----------------------*- C++ -*--=//
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//
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// This file implements the Type class for the VMCore library.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/DerivedTypes.h"
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#include "llvm/SymbolTable.h"
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#include "llvm/Constants.h"
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#include "Support/StringExtras.h"
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#include "Support/STLExtras.h"
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#include <algorithm>
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// DEBUG_MERGE_TYPES - Enable this #define to see how and when derived types are
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// created and later destroyed, all in an effort to make sure that there is only
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// a single cannonical version of a type.
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//
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//#define DEBUG_MERGE_TYPES 1
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//===----------------------------------------------------------------------===//
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// Type Class Implementation
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//===----------------------------------------------------------------------===//
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static unsigned CurUID = 0;
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static std::vector<const Type *> UIDMappings;
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void PATypeHolder::dump() const {
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std::cerr << "PATypeHolder(" << (void*)this << ")\n";
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}
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Type::Type(const std::string &name, PrimitiveID id)
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: Value(Type::TypeTy, Value::TypeVal) {
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setDescription(name);
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ID = id;
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Abstract = Recursive = false;
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UID = CurUID++; // Assign types UID's as they are created
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UIDMappings.push_back(this);
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}
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void Type::setName(const std::string &Name, SymbolTable *ST) {
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assert(ST && "Type::setName - Must provide symbol table argument!");
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if (Name.size()) ST->insert(Name, this);
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}
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const Type *Type::getUniqueIDType(unsigned UID) {
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assert(UID < UIDMappings.size() &&
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"Type::getPrimitiveType: UID out of range!");
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return UIDMappings[UID];
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}
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const Type *Type::getPrimitiveType(PrimitiveID IDNumber) {
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switch (IDNumber) {
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case VoidTyID : return VoidTy;
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case BoolTyID : return BoolTy;
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case UByteTyID : return UByteTy;
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case SByteTyID : return SByteTy;
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case UShortTyID: return UShortTy;
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case ShortTyID : return ShortTy;
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case UIntTyID : return UIntTy;
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case IntTyID : return IntTy;
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case ULongTyID : return ULongTy;
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case LongTyID : return LongTy;
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case FloatTyID : return FloatTy;
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case DoubleTyID: return DoubleTy;
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case TypeTyID : return TypeTy;
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case LabelTyID : return LabelTy;
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default:
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return 0;
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}
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}
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// isLosslesslyConvertibleTo - Return true if this type can be converted to
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// 'Ty' without any reinterpretation of bits. For example, uint to int.
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//
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bool Type::isLosslesslyConvertibleTo(const Type *Ty) const {
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if (this == Ty) return true;
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if ((!isPrimitiveType() && !isa<PointerType>(this)) ||
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(!isa<PointerType>(Ty) && !Ty->isPrimitiveType())) return false;
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if (getPrimitiveID() == Ty->getPrimitiveID())
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return true; // Handles identity cast, and cast of differing pointer types
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// Now we know that they are two differing primitive or pointer types
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switch (getPrimitiveID()) {
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case Type::UByteTyID: return Ty == Type::SByteTy;
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case Type::SByteTyID: return Ty == Type::UByteTy;
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case Type::UShortTyID: return Ty == Type::ShortTy;
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case Type::ShortTyID: return Ty == Type::UShortTy;
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case Type::UIntTyID: return Ty == Type::IntTy;
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case Type::IntTyID: return Ty == Type::UIntTy;
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case Type::ULongTyID:
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case Type::LongTyID:
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case Type::PointerTyID:
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return Ty == Type::ULongTy || Ty == Type::LongTy || isa<PointerType>(Ty);
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default:
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return false; // Other types have no identity values
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}
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}
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// getPrimitiveSize - Return the basic size of this type if it is a primative
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// type. These are fixed by LLVM and are not target dependant. This will
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// return zero if the type does not have a size or is not a primitive type.
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//
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unsigned Type::getPrimitiveSize() const {
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switch (getPrimitiveID()) {
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#define HANDLE_PRIM_TYPE(TY,SIZE) case TY##TyID: return SIZE;
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#include "llvm/Type.def"
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default: return 0;
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}
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}
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bool StructType::indexValid(const Value *V) const {
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if (!isa<Constant>(V)) return false;
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if (V->getType() != Type::UByteTy) return false;
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unsigned Idx = cast<ConstantUInt>(V)->getValue();
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return Idx < ETypes.size();
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}
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// getTypeAtIndex - Given an index value into the type, return the type of the
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// element. For a structure type, this must be a constant value...
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//
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const Type *StructType::getTypeAtIndex(const Value *V) const {
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assert(isa<Constant>(V) && "Structure index must be a constant!!");
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assert(V->getType() == Type::UByteTy && "Structure index must be ubyte!");
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unsigned Idx = cast<ConstantUInt>(V)->getValue();
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assert(Idx < ETypes.size() && "Structure index out of range!");
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assert(indexValid(V) && "Invalid structure index!"); // Duplicate check
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return ETypes[Idx];
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}
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//===----------------------------------------------------------------------===//
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// Auxilliary classes
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//===----------------------------------------------------------------------===//
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//
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// These classes are used to implement specialized behavior for each different
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// type.
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//
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struct SignedIntType : public Type {
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SignedIntType(const std::string &Name, PrimitiveID id) : Type(Name, id) {}
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// isSigned - Return whether a numeric type is signed.
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virtual bool isSigned() const { return 1; }
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// isInteger - Equivalent to isSigned() || isUnsigned, but with only a single
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// virtual function invocation.
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//
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virtual bool isInteger() const { return 1; }
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};
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struct UnsignedIntType : public Type {
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UnsignedIntType(const std::string &N, PrimitiveID id) : Type(N, id) {}
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// isUnsigned - Return whether a numeric type is signed.
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virtual bool isUnsigned() const { return 1; }
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// isInteger - Equivalent to isSigned() || isUnsigned, but with only a single
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// virtual function invocation.
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//
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virtual bool isInteger() const { return 1; }
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};
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struct OtherType : public Type {
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OtherType(const std::string &N, PrimitiveID id) : Type(N, id) {}
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};
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static struct TypeType : public Type {
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TypeType() : Type("type", TypeTyID) {}
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} TheTypeTy; // Implement the type that is global.
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//===----------------------------------------------------------------------===//
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// Static 'Type' data
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//===----------------------------------------------------------------------===//
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static OtherType TheVoidTy ("void" , Type::VoidTyID);
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static OtherType TheBoolTy ("bool" , Type::BoolTyID);
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static SignedIntType TheSByteTy ("sbyte" , Type::SByteTyID);
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static UnsignedIntType TheUByteTy ("ubyte" , Type::UByteTyID);
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static SignedIntType TheShortTy ("short" , Type::ShortTyID);
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static UnsignedIntType TheUShortTy("ushort", Type::UShortTyID);
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static SignedIntType TheIntTy ("int" , Type::IntTyID);
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static UnsignedIntType TheUIntTy ("uint" , Type::UIntTyID);
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static SignedIntType TheLongTy ("long" , Type::LongTyID);
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static UnsignedIntType TheULongTy ("ulong" , Type::ULongTyID);
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static OtherType TheFloatTy ("float" , Type::FloatTyID);
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static OtherType TheDoubleTy("double", Type::DoubleTyID);
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static OtherType TheLabelTy ("label" , Type::LabelTyID);
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Type *Type::VoidTy = &TheVoidTy;
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Type *Type::BoolTy = &TheBoolTy;
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Type *Type::SByteTy = &TheSByteTy;
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Type *Type::UByteTy = &TheUByteTy;
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Type *Type::ShortTy = &TheShortTy;
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Type *Type::UShortTy = &TheUShortTy;
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Type *Type::IntTy = &TheIntTy;
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Type *Type::UIntTy = &TheUIntTy;
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Type *Type::LongTy = &TheLongTy;
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Type *Type::ULongTy = &TheULongTy;
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Type *Type::FloatTy = &TheFloatTy;
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Type *Type::DoubleTy = &TheDoubleTy;
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Type *Type::TypeTy = &TheTypeTy;
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Type *Type::LabelTy = &TheLabelTy;
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//===----------------------------------------------------------------------===//
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// Derived Type Constructors
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//===----------------------------------------------------------------------===//
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FunctionType::FunctionType(const Type *Result,
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const std::vector<const Type*> &Params,
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bool IsVarArgs) : DerivedType(FunctionTyID),
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ResultType(PATypeHandle(Result, this)),
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isVarArgs(IsVarArgs) {
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ParamTys.reserve(Params.size());
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for (unsigned i = 0; i < Params.size(); ++i)
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ParamTys.push_back(PATypeHandle(Params[i], this));
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setDerivedTypeProperties();
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}
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StructType::StructType(const std::vector<const Type*> &Types)
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: CompositeType(StructTyID) {
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ETypes.reserve(Types.size());
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for (unsigned i = 0; i < Types.size(); ++i) {
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assert(Types[i] != Type::VoidTy && "Void type in method prototype!!");
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ETypes.push_back(PATypeHandle(Types[i], this));
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}
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setDerivedTypeProperties();
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}
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ArrayType::ArrayType(const Type *ElType, unsigned NumEl)
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: SequentialType(ArrayTyID, ElType) {
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NumElements = NumEl;
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setDerivedTypeProperties();
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}
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PointerType::PointerType(const Type *E) : SequentialType(PointerTyID, E) {
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setDerivedTypeProperties();
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}
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OpaqueType::OpaqueType() : DerivedType(OpaqueTyID) {
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setAbstract(true);
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setDescription("opaque"+utostr(getUniqueID()));
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#ifdef DEBUG_MERGE_TYPES
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std::cerr << "Derived new type: " << getDescription() << "\n";
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#endif
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}
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//===----------------------------------------------------------------------===//
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// Derived Type setDerivedTypeProperties Function
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//===----------------------------------------------------------------------===//
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// getTypeProps - This is a recursive function that walks a type hierarchy
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// calculating the description for a type and whether or not it is abstract or
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// recursive. Worst case it will have to do a lot of traversing if you have
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// some whacko opaque types, but in most cases, it will do some simple stuff
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// when it hits non-abstract types that aren't recursive.
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//
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static std::string getTypeProps(const Type *Ty,
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std::vector<const Type *> &TypeStack,
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bool &isAbstract, bool &isRecursive) {
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if (!Ty->isAbstract() && !Ty->isRecursive() && // Base case for the recursion
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Ty->getDescription().size()) {
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return Ty->getDescription(); // Primitive = leaf type
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} else if (isa<OpaqueType>(Ty)) { // Base case for the recursion
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isAbstract = true; // This whole type is abstract!
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return Ty->getDescription(); // Opaque = leaf type
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} else {
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// Check to see if the Type is already on the stack...
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unsigned Slot = 0, CurSize = TypeStack.size();
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while (Slot < CurSize && TypeStack[Slot] != Ty) ++Slot; // Scan for type
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// This is another base case for the recursion. In this case, we know
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// that we have looped back to a type that we have previously visited.
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// Generate the appropriate upreference to handle this.
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//
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if (Slot < CurSize) {
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isRecursive = true; // We know we are recursive
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return "\\" + utostr(CurSize-Slot); // Here's the upreference
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} else { // Recursive case: abstract derived type...
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std::string Result;
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TypeStack.push_back(Ty); // Add us to the stack..
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switch (Ty->getPrimitiveID()) {
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case Type::FunctionTyID: {
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const FunctionType *MTy = cast<FunctionType>(Ty);
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Result = getTypeProps(MTy->getReturnType(), TypeStack,
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isAbstract, isRecursive)+" (";
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for (FunctionType::ParamTypes::const_iterator
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I = MTy->getParamTypes().begin(),
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E = MTy->getParamTypes().end(); I != E; ++I) {
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if (I != MTy->getParamTypes().begin())
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Result += ", ";
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Result += getTypeProps(*I, TypeStack, isAbstract, isRecursive);
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}
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if (MTy->isVarArg()) {
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if (!MTy->getParamTypes().empty()) Result += ", ";
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Result += "...";
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}
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Result += ")";
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break;
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}
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case Type::StructTyID: {
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const StructType *STy = cast<StructType>(Ty);
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Result = "{ ";
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for (StructType::ElementTypes::const_iterator
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I = STy->getElementTypes().begin(),
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E = STy->getElementTypes().end(); I != E; ++I) {
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if (I != STy->getElementTypes().begin())
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Result += ", ";
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Result += getTypeProps(*I, TypeStack, isAbstract, isRecursive);
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}
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Result += " }";
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break;
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}
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case Type::PointerTyID: {
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const PointerType *PTy = cast<PointerType>(Ty);
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Result = getTypeProps(PTy->getElementType(), TypeStack,
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isAbstract, isRecursive) + " *";
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break;
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}
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case Type::ArrayTyID: {
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const ArrayType *ATy = cast<ArrayType>(Ty);
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unsigned NumElements = ATy->getNumElements();
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Result = "[";
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Result += utostr(NumElements) + " x ";
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Result += getTypeProps(ATy->getElementType(), TypeStack,
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isAbstract, isRecursive) + "]";
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break;
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}
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default:
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assert(0 && "Unhandled case in getTypeProps!");
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Result = "<error>";
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}
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TypeStack.pop_back(); // Remove self from stack...
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return Result;
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}
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}
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}
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// setDerivedTypeProperties - This function is used to calculate the
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// isAbstract, isRecursive, and the Description settings for a type. The
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// getTypeProps function does all the dirty work.
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//
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void DerivedType::setDerivedTypeProperties() {
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std::vector<const Type *> TypeStack;
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bool isAbstract = false, isRecursive = false;
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setDescription(getTypeProps(this, TypeStack, isAbstract, isRecursive));
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setAbstract(isAbstract);
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setRecursive(isRecursive);
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}
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//===----------------------------------------------------------------------===//
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// Type Structural Equality Testing
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//===----------------------------------------------------------------------===//
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// TypesEqual - Two types are considered structurally equal if they have the
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// same "shape": Every level and element of the types have identical primitive
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// ID's, and the graphs have the same edges/nodes in them. Nodes do not have to
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// be pointer equals to be equivalent though. This uses an optimistic algorithm
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// that assumes that two graphs are the same until proven otherwise.
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//
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static bool TypesEqual(const Type *Ty, const Type *Ty2,
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std::map<const Type *, const Type *> &EqTypes) {
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if (Ty == Ty2) return true;
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if (Ty->getPrimitiveID() != Ty2->getPrimitiveID()) return false;
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if (Ty->isPrimitiveType()) return true;
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if (isa<OpaqueType>(Ty))
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return false; // Two nonequal opaque types are never equal
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std::map<const Type*, const Type*>::iterator It = EqTypes.find(Ty);
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if (It != EqTypes.end())
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return It->second == Ty2; // Looping back on a type, check for equality
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// Otherwise, add the mapping to the table to make sure we don't get
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// recursion on the types...
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EqTypes.insert(std::make_pair(Ty, Ty2));
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// Iterate over the types and make sure the the contents are equivalent...
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Type::subtype_iterator I = Ty ->subtype_begin(), IE = Ty ->subtype_end();
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Type::subtype_iterator I2 = Ty2->subtype_begin(), IE2 = Ty2->subtype_end();
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for (; I != IE && I2 != IE2; ++I, ++I2)
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if (!TypesEqual(*I, *I2, EqTypes)) return false;
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// Two really annoying special cases that breaks an otherwise nice simple
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// algorithm is the fact that arraytypes have sizes that differentiates types,
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// and that method types can be varargs or not. Consider this now.
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if (const ArrayType *ATy = dyn_cast<ArrayType>(Ty)) {
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if (ATy->getNumElements() != cast<ArrayType>(Ty2)->getNumElements())
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return false;
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} else if (const FunctionType *MTy = dyn_cast<FunctionType>(Ty)) {
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if (MTy->isVarArg() != cast<FunctionType>(Ty2)->isVarArg())
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return false;
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}
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return I == IE && I2 == IE2; // Types equal if both iterators are done
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}
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static bool TypesEqual(const Type *Ty, const Type *Ty2) {
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std::map<const Type *, const Type *> EqTypes;
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return TypesEqual(Ty, Ty2, EqTypes);
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}
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//===----------------------------------------------------------------------===//
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// Derived Type Factory Functions
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//===----------------------------------------------------------------------===//
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// TypeMap - Make sure that only one instance of a particular type may be
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// created on any given run of the compiler... note that this involves updating
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// our map if an abstract type gets refined somehow...
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//
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template<class ValType, class TypeClass>
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class TypeMap : public AbstractTypeUser {
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typedef std::map<ValType, PATypeHandle> MapTy;
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MapTy Map;
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public:
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~TypeMap() { print("ON EXIT"); }
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inline TypeClass *get(const ValType &V) {
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typename std::map<ValType, PATypeHandle>::iterator I
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= Map.find(V);
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// TODO: FIXME: When Types are not CONST.
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return (I != Map.end()) ? (TypeClass*)I->second.get() : 0;
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}
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inline void add(const ValType &V, TypeClass *T) {
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Map.insert(std::make_pair(V, PATypeHandle(T, this)));
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print("add");
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}
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// containsEquivalent - Return true if the typemap contains a type that is
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// structurally equivalent to the specified type.
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//
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inline const TypeClass *containsEquivalent(const TypeClass *Ty) {
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for (typename MapTy::iterator I = Map.begin(), E = Map.end(); I != E; ++I)
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if (I->second.get() != Ty && TypesEqual(Ty, I->second.get()))
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return (TypeClass*)I->second.get(); // FIXME TODO when types not const
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return 0;
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}
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// refineAbstractType - This is called when one of the contained abstract
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// types gets refined... this simply removes the abstract type from our table.
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// We expect that whoever refined the type will add it back to the table,
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// corrected.
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//
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virtual void refineAbstractType(const DerivedType *OldTy, const Type *NewTy) {
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#ifdef DEBUG_MERGE_TYPES
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std::cerr << "Removing Old type from Tab: " << (void*)OldTy << ", "
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<< OldTy->getDescription() << " replacement == " << (void*)NewTy
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<< ", " << NewTy->getDescription() << "\n";
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#endif
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for (typename MapTy::iterator I = Map.begin(), E = Map.end(); I != E; ++I)
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if (I->second == OldTy) {
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// Check to see if the type just became concrete. If so, remove self
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// from user list.
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I->second.removeUserFromConcrete();
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I->second = cast<TypeClass>(NewTy);
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}
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}
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|
|
void remove(const ValType &OldVal) {
|
|
typename MapTy::iterator I = Map.find(OldVal);
|
|
assert(I != Map.end() && "TypeMap::remove, element not found!");
|
|
Map.erase(I);
|
|
}
|
|
|
|
void print(const char *Arg) const {
|
|
#ifdef DEBUG_MERGE_TYPES
|
|
std::cerr << "TypeMap<>::" << Arg << " table contents:\n";
|
|
unsigned i = 0;
|
|
for (MapTy::const_iterator I = Map.begin(), E = Map.end(); I != E; ++I)
|
|
std::cerr << " " << (++i) << ". " << I->second << " "
|
|
<< I->second->getDescription() << "\n";
|
|
#endif
|
|
}
|
|
|
|
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 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 {
|
|
std::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 RetTy;
|
|
std::vector<PATypeHandle> ArgTypes;
|
|
bool isVarArg;
|
|
public:
|
|
FunctionValType(const Type *ret, const std::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(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(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 std::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
|
|
std::cerr << "Derived new type: " << MT << "\n";
|
|
#endif
|
|
return MT;
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Array Type Factory...
|
|
//
|
|
class ArrayValType : public ValTypeBase<ArrayValType, ArrayType> {
|
|
PATypeHandle ValTy;
|
|
unsigned Size;
|
|
public:
|
|
ArrayValType(const Type *val, int sz, TypeMap<ArrayValType, ArrayType> &Tab)
|
|
: ValTypeBase<ArrayValType, ArrayType>(Tab), ValTy(val, this), Size(sz) {}
|
|
|
|
// 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!");
|
|
|
|
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
|
|
std::cerr << "Derived new type: " << AT->getDescription() << "\n";
|
|
#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> {
|
|
std::vector<PATypeHandle> ElTypes;
|
|
public:
|
|
StructValType(const std::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(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(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();
|
|
}
|
|
|
|
inline bool operator<(const StructValType &STV) const {
|
|
return ElTypes < STV.ElTypes;
|
|
}
|
|
};
|
|
|
|
static TypeMap<StructValType, StructType> StructTypes;
|
|
|
|
StructType *StructType::get(const std::vector<const Type*> &ETypes) {
|
|
StructValType STV(ETypes, StructTypes);
|
|
StructType *ST = StructTypes.get(STV);
|
|
if (ST) return ST;
|
|
|
|
// Value not found. Derive a new type!
|
|
StructTypes.add(STV, ST = new StructType(ETypes));
|
|
|
|
#ifdef DEBUG_MERGE_TYPES
|
|
std::cerr << "Derived new type: " << ST->getDescription() << "\n";
|
|
#endif
|
|
return ST;
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Pointer Type Factory...
|
|
//
|
|
|
|
// PointerValType - Define a class to hold the key that goes into the TypeMap
|
|
//
|
|
class PointerValType : public ValTypeBase<PointerValType, PointerType> {
|
|
PATypeHandle 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
|
|
std::cerr << "Derived new type: " << PT->getDescription() << "\n";
|
|
#endif
|
|
return PT;
|
|
}
|
|
|
|
void debug_type_tables() {
|
|
FunctionTypes.dump();
|
|
ArrayTypes.dump();
|
|
StructTypes.dump();
|
|
PointerTypes.dump();
|
|
}
|
|
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Derived Type Refinement Functions
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
// 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
|
|
std::cerr << " addAbstractTypeUser[" << (void*)this << ", "
|
|
<< getDescription() << "][" << AbstractTypeUsers.size()
|
|
<< "] User = " << U << "\n";
|
|
#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
|
|
std::cerr << " remAbstractTypeUser[" << (void*)this << ", "
|
|
<< getDescription() << "][" << i << "] User = " << U << "\n";
|
|
#endif
|
|
|
|
if (AbstractTypeUsers.empty() && isAbstract()) {
|
|
#ifdef DEBUG_MERGE_TYPES
|
|
std::cerr << "DELETEing unused abstract type: <" << getDescription()
|
|
<< ">[" << (void*)this << "]" << "\n";
|
|
#endif
|
|
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
|
|
std::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.
|
|
std::swap(AbstractTypeUsers.back(), AbstractTypeUsers[NumSelfUses++]);
|
|
} else {
|
|
unsigned OldSize = AbstractTypeUsers.size();
|
|
#ifdef DEBUG_MERGE_TYPES
|
|
std::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)
|
|
std::cerr << "User changed!\n";
|
|
std::cerr << "Top of user list is:\n";
|
|
AbstractTypeUsers.back()->dump();
|
|
|
|
std::cerr <<"\nOld User=\n";
|
|
User->dump();
|
|
}
|
|
#endif
|
|
assert(AbstractTypeUsers.size() != OldSize &&
|
|
"AbsTyUser did not remove self from user list!");
|
|
}
|
|
}
|
|
|
|
// 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
|
|
std::cerr << "typeIsREFINED type: " << (void*)this <<" "<<getDescription()
|
|
<< "\n";
|
|
#endif
|
|
|
|
// 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.
|
|
//
|
|
std::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
|
|
std::cerr << " typeIsREFINED user " << i << "[" << ATU
|
|
<< "] of abstract type [" << (void*)this << " "
|
|
<< getDescription() << "]\n";
|
|
#endif
|
|
ATU->refineAbstractType(this, this);
|
|
}
|
|
|
|
--isRefining;
|
|
|
|
#ifndef _NDEBUG
|
|
if (!(isAbstract() || AbstractTypeUsers.empty()))
|
|
for (unsigned i = 0; i < AbstractTypeUsers.size(); ++i) {
|
|
if (AbstractTypeUsers[i] != this) {
|
|
// Debugging hook
|
|
std::cerr << "FOUND FAILURE\nUser: ";
|
|
AbstractTypeUsers[i]->dump();
|
|
std::cerr << "\nCatch:\n";
|
|
AbstractTypeUsers[i]->refineAbstractType(this, this);
|
|
assert(0 && "Type became concrete,"
|
|
" but it still has abstract type users hanging around!");
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
|
|
|
|
|
|
// 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
|
|
std::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...
|
|
}
|
|
}
|
|
|
|
|
|
// 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
|
|
std::cerr << "ArrayTy::refineAbstractTy(" << (void*)OldType << "["
|
|
<< OldType->getDescription() << "], " << (void*)NewType << " ["
|
|
<< NewType->getDescription() << "])\n";
|
|
#endif
|
|
|
|
assert(getElementType() == OldType);
|
|
ElementType.removeUserFromConcrete();
|
|
ElementType = NewType;
|
|
|
|
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...
|
|
}
|
|
}
|
|
|
|
|
|
// 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
|
|
std::cerr << "StructTy::refineAbstractTy(" << (void*)OldType << "["
|
|
<< OldType->getDescription() << "], " << (void*)NewType << " ["
|
|
<< NewType->getDescription() << "])\n";
|
|
#endif
|
|
for (int i = ETypes.size()-1; i >= 0; --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
|
|
std::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...
|
|
}
|
|
}
|
|
|