#ifndef LLVM_VALUE_H
#define LLVM_VALUE_H
-#include "llvm/AbstractTypeUser.h"
#include "llvm/Use.h"
-#include "llvm/ADT/StringRef.h"
#include "llvm/Support/Casting.h"
-#include <string>
namespace llvm {
class GlobalAlias;
class InlineAsm;
class ValueSymbolTable;
-class TypeSymbolTable;
template<typename ValueTy> class StringMapEntry;
-template <typename ValueTy = Value>
-class AssertingVH;
typedef StringMapEntry<Value*> ValueName;
class raw_ostream;
class AssemblyAnnotationWriter;
class LLVMContext;
class Twine;
class MDNode;
+class Type;
+class StringRef;
//===----------------------------------------------------------------------===//
// Value Class
/// 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
/// This field is initialized to zero by the ctor.
unsigned short SubclassData;
- PATypeHolder VTy;
+ Type *VTy;
Use *UseList;
friend class ValueSymbolTable; // Allow ValueSymbolTable to directly mod Name.
friend class ValueHandleBase;
- friend class AbstractTypeUser;
ValueName *Name;
void operator=(const Value &); // Do not implement
/// printing behavior.
virtual void printCustom(raw_ostream &O) const;
- Value(const Type *Ty, unsigned scid);
+ Value(Type *Ty, unsigned scid);
public:
virtual ~Value();
/// 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.
///
- /// \arg Name - The new name; or "" if the value's name should be removed.
+ /// \param Name The new name; or "" if the value's name should be removed.
void setName(const Twine &Name);
///
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.
//
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;
BlockAddressVal, // This is an instance of BlockAddress
ConstantExprVal, // This is an instance of ConstantExpr
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
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
MDNodeVal, // This is an instance of MDNode
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 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<Value*>(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. 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);
+ /// 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<Value*>(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<Value*>(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
return const_cast<Value*>(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; }
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