#include "llvm/AbstractTypeUser.h"
#include "llvm/Use.h"
+#include "llvm/ADT/StringRef.h"
#include "llvm/Support/Casting.h"
-#include <iosfwd>
#include <string>
namespace llvm {
class raw_ostream;
class AssemblyAnnotationWriter;
class ValueHandleBase;
+class LLVMContext;
+class Twine;
+class MDNode;
//===----------------------------------------------------------------------===//
// Value Class
///
/// 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
/// 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;
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 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;
+
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; }
+ /// All values hold a context through their type.
+ LLVMContext &getContext() const;
+
// All values can potentially be named...
inline bool hasName() const { return Name != 0; }
ValueName *getValueName() const { return Name; }
-
- /// getNameStart - Return a pointer to a null terminated string for this name.
- /// Note that names can have null characters within the string as well as at
- /// their end. This always returns a non-null pointer.
- const char *getNameStart() const;
- /// getNameEnd - Return a pointer to the end of the name.
- const char *getNameEnd() const { return getNameStart() + getNameLen(); }
- /// isName - Return true if this value has the name specified by the provided
- /// nul terminated string.
- bool isName(const char *N) const;
-
- /// getNameLen - Return the length of the string, correctly handling nul
- /// characters embedded into them.
- unsigned getNameLen() const;
-
- /// getName()/getNameStr() - Return the name of the specified value,
- /// *constructing a string* to hold it. Because these are guaranteed to
- /// construct a string, they are very expensive and should be avoided.
- std::string getName() const { return getNameStr(); }
+ /// 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;
-
- void setName(const std::string &name);
- void setName(const char *Name, unsigned NameLen);
- void setName(const char *Name); // Takes a null-terminated string.
+ /// setName() - Change the name of the value, choosing a new unique name if
+ /// the provided name is taken.
+ ///
+ /// \arg Name - The new name; or "" if the value's name should be removed.
+ void setName(const Twine &Name);
/// takeName - transfer the name from V to this value, setting V's name to
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
ConstantIntVal, // This is an instance of ConstantInt
ConstantFPVal, // This is an instance of ConstantFP
ConstantArrayVal, // This is an instance of ConstantArray
ConstantStructVal, // This is an instance of ConstantStruct
+ ConstantUnionVal, // This is an instance of ConstantUnion
ConstantVectorVal, // This is an instance of ConstantVector
ConstantPointerNullVal, // This is an instance of ConstantPointerNull
- MDStringVal, // This is an instance of MDString
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 = MDNodeVal
+ ConstantLastVal = ConstantPointerNullVal
};
/// getValueID - Return an ID for the concrete type of this object. This is
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;
+ }
+
+ /// 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;
+ }
+
// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const Value *) {
return true; // Values are always values.
/// 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<Value*>(this)->getUnderlyingObject();
+ /// specified value does. If the MaxLookup value is non-zero, it limits the
+ /// number of instructions to be stripped off.
+ Value *getUnderlyingObject(unsigned MaxLookup = 6);
+ const Value *getUnderlyingObject(unsigned MaxLookup = 6) const {
+ return const_cast<Value*>(this)->getUnderlyingObject(MaxLookup);
}
/// DoPHITranslation - If this value is a PHI node with CurBB as its parent,
const BasicBlock *PredBB) const{
return const_cast<Value*>(this)->DoPHITranslation(CurBB, PredBB);
}
+
+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;
return isa<GlobalVariable>(Val) || isa<Function>(Val) ||
isa<GlobalAlias>(Val);
}
+template <> inline bool isa_impl<MDNode, Value>(const Value &Val) {
+ return Val.getValueID() == Value::MDNodeVal;
+}
// Value* is only 4-byte aligned.