X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FValue.h;h=a71e2fdefd72a625c76cd3df74f74b4b3cd8831d;hb=73c8415d90ad5a702538d8bc308411e7b2299f32;hp=87c4dc2df30911440d11123d6a4666c1ce70f844;hpb=937b1e92a9862862722732cb0f72d5ade77ac4c8;p=oota-llvm.git diff --git a/include/llvm/Value.h b/include/llvm/Value.h index 87c4dc2df30..a71e2fdefd7 100644 --- a/include/llvm/Value.h +++ b/include/llvm/Value.h @@ -14,10 +14,8 @@ #ifndef LLVM_VALUE_H #define LLVM_VALUE_H -#include "llvm/AbstractTypeUser.h" #include "llvm/Use.h" #include "llvm/ADT/StringRef.h" -#include "llvm/ADT/Twine.h" #include "llvm/Support/Casting.h" #include @@ -33,7 +31,6 @@ class GlobalVariable; class GlobalAlias; class InlineAsm; class ValueSymbolTable; -class TypeSymbolTable; template class StringMapEntry; template class AssertingVH; @@ -42,7 +39,9 @@ class raw_ostream; class AssemblyAnnotationWriter; class ValueHandleBase; class LLVMContext; -class Metadata; +class Twine; +class MDNode; +class Type; //===----------------------------------------------------------------------===// // Value Class @@ -51,20 +50,19 @@ class Metadata; /// This is a very important LLVM class. It is the base class of all values /// computed by a program that may be used as operands to other values. Value is /// the super class of other important classes such as Instruction and Function. -/// All Values have a Type. Type is not a subclass of Value. All types can have -/// a name and they should belong to some Module. Setting the name on the Value +/// All Values have a Type. Type is not a subclass of Value. Some values can +/// have a name and they belong to some Module. Setting the name on the Value /// automatically updates the module's symbol table. /// /// Every value has a "use list" that keeps track of which other Values are /// using this Value. A Value can also have an arbitrary number of ValueHandle -/// objects that watch it and listen to RAUW and Destroy events see +/// objects that watch it and listen to RAUW and Destroy events. See /// llvm/Support/ValueHandle.h for details. /// /// @brief LLVM Value Representation class Value { const unsigned char SubclassID; // Subclass identifier (for isa/dyn_cast) unsigned char HasValueHandle : 1; // Has a ValueHandle pointing to this? - unsigned char HasMetadata : 1; // Has a metadata attached to this ? protected: /// SubclassOptionalData - This member is similar to SubclassData, however it /// is for holding information which may be used to aid optimization, but @@ -72,31 +70,34 @@ protected: /// interpretation. unsigned char SubclassOptionalData : 7; +private: /// SubclassData - This member is defined by this class, but is not used for /// anything. Subclasses can use it to hold whatever state they find useful. /// This field is initialized to zero by the ctor. unsigned short SubclassData; -private: - PATypeHolder VTy; + + Type *VTy; Use *UseList; friend class ValueSymbolTable; // Allow ValueSymbolTable to directly mod Name. - friend class SymbolTable; // Allow SymbolTable to directly poke Name. friend class ValueHandleBase; - friend class Metadata; - friend class AbstractTypeUser; ValueName *Name; void operator=(const Value &); // Do not implement Value(const Value &); // Do not implement +protected: + /// printCustom - Value subclasses can override this to implement custom + /// printing behavior. + virtual void printCustom(raw_ostream &O) const; + + Value(Type *Ty, unsigned scid); public: - Value(const Type *Ty, unsigned scid); virtual ~Value(); /// dump - Support for debugging, callable in GDB: V->dump() // - virtual void dump() const; + void dump() const; /// print - Implement operator<< on Value. /// @@ -104,13 +105,13 @@ public: /// All values are typed, get the type of this value. /// - inline const Type *getType() const { return VTy; } + Type *getType() const { return VTy; } /// All values hold a context through their type. LLVMContext &getContext() const; // All values can potentially be named... - inline bool hasName() const { return Name != 0; } + bool hasName() const { return Name != 0; } ValueName *getValueName() const { return Name; } /// getName() - Return a constant reference to the value's name. This is cheap @@ -146,21 +147,17 @@ public: /// void replaceAllUsesWith(Value *V); - // uncheckedReplaceAllUsesWith - Just like replaceAllUsesWith but dangerous. - // Only use when in type resolution situations! - void uncheckedReplaceAllUsesWith(Value *V); - //---------------------------------------------------------------------- // Methods for handling the chain of uses of this Value. // typedef value_use_iterator use_iterator; - typedef value_use_iterator use_const_iterator; + typedef value_use_iterator const_use_iterator; bool use_empty() const { return UseList == 0; } use_iterator use_begin() { return use_iterator(UseList); } - use_const_iterator use_begin() const { return use_const_iterator(UseList); } + const_use_iterator use_begin() const { return const_use_iterator(UseList); } use_iterator use_end() { return use_iterator(0); } - use_const_iterator use_end() const { return use_const_iterator(0); } + const_use_iterator use_end() const { return const_use_iterator(0); } User *use_back() { return *use_begin(); } const User *use_back() const { return *use_begin(); } @@ -169,7 +166,7 @@ public: /// traversing the whole use list. /// bool hasOneUse() const { - use_const_iterator I = use_begin(), E = use_end(); + const_use_iterator I = use_begin(), E = use_end(); if (I == E) return false; return ++I == E; } @@ -186,7 +183,7 @@ public: bool isUsedInBasicBlock(const BasicBlock *BB) const; /// getNumUses - This method computes the number of uses of this Value. This - /// is a linear time operation. Use hasOneUse, hasNUses, or hasMoreThanNUses + /// is a linear time operation. Use hasOneUse, hasNUses, or hasNUsesOrMore /// to check for specific values. unsigned getNumUses() const; @@ -205,8 +202,9 @@ public: GlobalAliasVal, // This is an instance of GlobalAlias GlobalVariableVal, // This is an instance of GlobalVariable UndefValueVal, // This is an instance of UndefValue + BlockAddressVal, // This is an instance of BlockAddress ConstantExprVal, // This is an instance of ConstantExpr - ConstantAggregateZeroVal, // This is an instance of ConstantAggregateNull + ConstantAggregateZeroVal, // This is an instance of ConstantAggregateZero ConstantIntVal, // This is an instance of ConstantInt ConstantFPVal, // This is an instance of ConstantFP ConstantArrayVal, // This is an instance of ConstantArray @@ -215,11 +213,14 @@ public: ConstantPointerNullVal, // This is an instance of ConstantPointerNull MDNodeVal, // This is an instance of MDNode MDStringVal, // This is an instance of MDString - NamedMDNodeVal, // This is an instance of NamedMDNode InlineAsmVal, // This is an instance of InlineAsm PseudoSourceValueVal, // This is an instance of PseudoSourceValue + FixedStackPseudoSourceValueVal, // This is an instance of + // FixedStackPseudoSourceValue InstructionVal, // This is an instance of Instruction - + // Enum values starting at InstructionVal are used for Instructions; + // don't add new values here! + // Markers: ConstantFirstVal = FunctionVal, ConstantLastVal = ConstantPointerNullVal @@ -245,6 +246,12 @@ public: return SubclassOptionalData; } + /// clearSubclassOptionalData - Clear the optional flags contained in + /// this value. + void clearSubclassOptionalData() { + SubclassOptionalData = 0; + } + /// hasSameSubclassOptionalData - Test whether the optional flags contained /// in this value are equal to the optional flags in the given value. bool hasSameSubclassOptionalData(const Value *V) const { @@ -257,15 +264,15 @@ public: SubclassOptionalData &= V->SubclassOptionalData; } + /// hasValueHandle - Return true if there is a value handle associated with + /// this value. + bool hasValueHandle() const { return HasValueHandle; } + // Methods for support type inquiry through isa, cast, and dyn_cast: static inline bool classof(const Value *) { return true; // Values are always values. } - /// getRawType - This should only be used to implement the vmcore library. - /// - const Type *getRawType() const { return VTy.getRawType(); } - /// stripPointerCasts - This method strips off any unneeded pointer /// casts from the specified value, returning the original uncasted value. /// Note that the returned value has pointer type if the specified value does. @@ -274,14 +281,9 @@ public: return const_cast(this)->stripPointerCasts(); } - /// getUnderlyingObject - This method strips off any GEP address adjustments - /// and pointer casts from the specified value, returning the original object - /// being addressed. Note that the returned value has pointer type if the - /// specified value does. - Value *getUnderlyingObject(); - const Value *getUnderlyingObject() const { - return const_cast(this)->getUnderlyingObject(); - } + /// isDereferenceablePointer - Test if this value is always a pointer to + /// allocated and suitably aligned memory for a simple load or store. + bool isDereferenceablePointer() const; /// DoPHITranslation - If this value is a PHI node with CurBB as its parent, /// return the value in the PHI node corresponding to PredBB. If not, return @@ -293,6 +295,23 @@ public: const BasicBlock *PredBB) const{ return const_cast(this)->DoPHITranslation(CurBB, PredBB); } + + /// MaximumAlignment - This is the greatest alignment value supported by + /// load, store, and alloca instructions, and global values. + static const unsigned MaximumAlignment = 1u << 29; + + /// mutateType - Mutate the type of this Value to be of the specified type. + /// Note that this is an extremely dangerous operation which can create + /// completely invalid IR very easily. It is strongly recommended that you + /// recreate IR objects with the right types instead of mutating them in + /// place. + void mutateType(Type *Ty) { + VTy = Ty; + } + +protected: + unsigned short getSubclassDataFromValue() const { return SubclassData; } + void setValueSubclassData(unsigned short D) { SubclassData = D; } }; inline raw_ostream &operator<<(raw_ostream &OS, const Value &V) { @@ -310,36 +329,67 @@ void Use::set(Value *V) { // isa - Provide some specializations of isa so that we don't have to include // the subtype header files to test to see if the value is a subclass... // -template <> inline bool isa_impl(const Value &Val) { - return Val.getValueID() >= Value::ConstantFirstVal && - Val.getValueID() <= Value::ConstantLastVal; -} -template <> inline bool isa_impl(const Value &Val) { - return Val.getValueID() == Value::ArgumentVal; -} -template <> inline bool isa_impl(const Value &Val) { - return Val.getValueID() == Value::InlineAsmVal; -} -template <> inline bool isa_impl(const Value &Val) { - return Val.getValueID() >= Value::InstructionVal; -} -template <> inline bool isa_impl(const Value &Val) { - return Val.getValueID() == Value::BasicBlockVal; -} -template <> inline bool isa_impl(const Value &Val) { - return Val.getValueID() == Value::FunctionVal; -} -template <> inline bool isa_impl(const Value &Val) { - return Val.getValueID() == Value::GlobalVariableVal; -} -template <> inline bool isa_impl(const Value &Val) { - return Val.getValueID() == Value::GlobalAliasVal; -} -template <> inline bool isa_impl(const Value &Val) { - return isa(Val) || isa(Val) || - isa(Val); -} - +template <> struct isa_impl { + static inline bool doit(const Value &Val) { + return Val.getValueID() >= Value::ConstantFirstVal && + Val.getValueID() <= Value::ConstantLastVal; + } +}; + +template <> struct isa_impl { + static inline bool doit (const Value &Val) { + return Val.getValueID() == Value::ArgumentVal; + } +}; + +template <> struct isa_impl { + static inline bool doit(const Value &Val) { + return Val.getValueID() == Value::InlineAsmVal; + } +}; + +template <> struct isa_impl { + static inline bool doit(const Value &Val) { + return Val.getValueID() >= Value::InstructionVal; + } +}; + +template <> struct isa_impl { + static inline bool doit(const Value &Val) { + return Val.getValueID() == Value::BasicBlockVal; + } +}; + +template <> struct isa_impl { + static inline bool doit(const Value &Val) { + return Val.getValueID() == Value::FunctionVal; + } +}; + +template <> struct isa_impl { + static inline bool doit(const Value &Val) { + return Val.getValueID() == Value::GlobalVariableVal; + } +}; + +template <> struct isa_impl { + static inline bool doit(const Value &Val) { + return Val.getValueID() == Value::GlobalAliasVal; + } +}; + +template <> struct isa_impl { + static inline bool doit(const Value &Val) { + return isa(Val) || isa(Val) || + isa(Val); + } +}; + +template <> struct isa_impl { + static inline bool doit(const Value &Val) { + return Val.getValueID() == Value::MDNodeVal; + } +}; // Value* is only 4-byte aligned. template<>