X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FValue.h;h=a82ac45c49edf3341017ba51340c908b19b10561;hb=27745c19a957f1298cc2c56e6dabea5ef244a1c8;hp=b1db1ce3e1ee8831c1923c410f481a88ccac0a73;hpb=f457d1316dec017cf204b54524878310c356bf64;p=oota-llvm.git diff --git a/include/llvm/Value.h b/include/llvm/Value.h index b1db1ce3e1e..a82ac45c49e 100644 --- a/include/llvm/Value.h +++ b/include/llvm/Value.h @@ -14,13 +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 -#include namespace llvm { @@ -34,15 +29,16 @@ class GlobalVariable; class GlobalAlias; class InlineAsm; class ValueSymbolTable; -class TypeSymbolTable; template class StringMapEntry; -template -class AssertingVH; typedef StringMapEntry ValueName; class raw_ostream; class AssemblyAnnotationWriter; class ValueHandleBase; class LLVMContext; +class Twine; +class MDNode; +class Type; +class StringRef; //===----------------------------------------------------------------------===// // Value Class @@ -51,13 +47,13 @@ class LLVMContext; /// 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 @@ -71,62 +67,56 @@ 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; 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. /// - void print(std::ostream &O, AssemblyAnnotationWriter *AAW = 0) const; void print(raw_ostream &O, AssemblyAnnotationWriter *AAW = 0) const; /// 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; } + // All values can potentially be named. + bool hasName() const { return Name != 0 && SubclassID != MDStringVal; } ValueName *getValueName() const { return Name; } + void setValueName(ValueName *VN) { Name = VN; } /// getName() - Return a constant reference to the value's name. This is cheap /// and guaranteed to return the same reference as long as the value is not /// modified. - /// - /// This is currently guaranteed to return a StringRef for which data() points - /// to a valid null terminated string. The use of StringRef.data() is - /// deprecated here, however, and clients should not rely on it. If such - /// behavior is needed, clients should use expensive getNameStr(), or switch - /// to an interface that does not depend on null termination. StringRef getName() const; - /// getNameStr() - Return the name of the specified value, *constructing a - /// string* to hold it. This is guaranteed to construct a string and is very - /// expensive, clients should use getName() unless necessary. - std::string getNameStr() const; - /// setName() - Change the name of the value, choosing a new unique name if /// the provided name is taken. /// @@ -144,27 +134,17 @@ public: /// void replaceAllUsesWith(Value *V); - // uncheckedReplaceAllUsesWith - Just like replaceAllUsesWith but dangerous. - // Only use when in type resolution situations! - void uncheckedReplaceAllUsesWith(Value *V); - - /// clearOptionalData - Clear any optional optimization data from this Value. - /// Transformation passes must call this method whenever changing the IR - /// in a way that would affect the values produced by this Value, unless - /// it takes special care to ensure correctness in some other way. - void clearOptionalData() { SubclassOptionalData = 0; } - //---------------------------------------------------------------------- // 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(); } @@ -173,7 +153,7 @@ 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; } @@ -190,7 +170,7 @@ 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; @@ -209,8 +189,11 @@ 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 + ConstantDataArrayVal, // This is an instance of ConstantDataArray + ConstantDataVectorVal, // This is an instance of ConstantDataVector ConstantIntVal, // This is an instance of ConstantInt ConstantFPVal, // This is an instance of ConstantFP ConstantArrayVal, // This is an instance of ConstantArray @@ -219,11 +202,14 @@ 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 @@ -242,31 +228,69 @@ public: return SubclassID; } + /// getRawSubclassOptionalData - Return the raw optional flags value + /// contained in this value. This should only be used when testing two + /// Values for equivalence. + unsigned getRawSubclassOptionalData() const { + 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 { + return SubclassOptionalData == V->SubclassOptionalData; + } + + /// intersectOptionalDataWith - Clear any optional flags in this value + /// that are not also set in the given value. + void intersectOptionalDataWith(const Value *V) { + 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. + /// stripPointerCasts - This method strips off any unneeded pointer casts and + /// all-zero GEPs from the specified value, returning the original uncasted + /// value. If this is called on a non-pointer value, it returns 'this'. Value *stripPointerCasts(); const Value *stripPointerCasts() const { 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(); + /// stripInBoundsConstantOffsets - This method strips off unneeded pointer casts and + /// all-constant GEPs from the specified value, returning the original + /// pointer value. If this is called on a non-pointer value, it returns + /// 'this'. + Value *stripInBoundsConstantOffsets(); + const Value *stripInBoundsConstantOffsets() const { + return const_cast(this)->stripInBoundsConstantOffsets(); + } + + /// stripInBoundsOffsets - This method strips off unneeded pointer casts and + /// any in-bounds Offsets from the specified value, returning the original + /// pointer value. If this is called on a non-pointer value, it returns + /// 'this'. + Value *stripInBoundsOffsets(); + const Value *stripInBoundsOffsets() const { + return const_cast(this)->stripInBoundsOffsets(); } + + /// 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 @@ -278,12 +302,25 @@ 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 std::ostream &operator<<(std::ostream &OS, const Value &V) { - V.print(OS); - return OS; -} inline raw_ostream &operator<<(raw_ostream &OS, const Value &V) { V.print(OS); return OS; @@ -299,36 +336,67 @@ 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<>