//===----------------------------------------------------------------------===//
//
// This file declares the Value class.
-// This file also defines the Use<> template for users of value.
//
//===----------------------------------------------------------------------===//
#include "llvm/AbstractTypeUser.h"
#include "llvm/Use.h"
#include "llvm/Support/Casting.h"
-#include "llvm/Support/Streams.h"
+#include <iosfwd>
#include <string>
namespace llvm {
class TypeSymbolTable;
template<typename ValueTy> class StringMapEntry;
typedef StringMapEntry<Value*> ValueName;
+class raw_ostream;
+class AssemblyAnnotationWriter;
//===----------------------------------------------------------------------===//
// Value Class
/// 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
-/// automatically update's the module's symbol table.
+/// automatically updates the module's symbol table.
///
/// Every value has a "use list" that keeps track of which other Values are
/// using this Value.
/// This field is initialized to zero by the ctor.
unsigned short SubclassData;
private:
- PATypeHolder Ty;
+ PATypeHolder VTy;
Use *UseList;
friend class ValueSymbolTable; // Allow ValueSymbolTable to directly mod Name.
//
virtual void dump() const;
- /// print - Implement operator<< on Value...
+ /// print - Implement operator<< on Value.
///
- virtual void print(std::ostream &O) const = 0;
- void print(std::ostream *O) const { if (O) print(*O); }
+ 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 Ty; }
+ inline const Type *getType() const { return VTy; }
// All values can potentially be named...
inline bool hasName() const { return Name != 0; }
/// 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.
void uncheckedReplaceAllUsesWith(Value *V);
//----------------------------------------------------------------------
- // Methods for handling the vector of uses of this Value.
+ // Methods for handling the chain of uses of this Value.
//
typedef value_use_iterator<User> use_iterator;
typedef value_use_iterator<const User> use_const_iterator;
use_iterator use_end() { return use_iterator(0); }
use_const_iterator use_end() const { return use_const_iterator(0); }
User *use_back() { return *use_begin(); }
- const User *use_back() const { return *use_begin(); }
+ const User *use_back() const { return *use_begin(); }
/// hasOneUse - Return true if there is exactly one user of this value. This
/// is specialized because it is a common request and does not require
///
bool hasNUsesOrMore(unsigned N) const;
+ 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
/// to check for specific values.
unsigned getNumUses() const;
- /// addUse/killUse - These two methods should only be used by the Use class.
+ /// addUse - This method should only be used by the Use class.
///
void addUse(Use &U) { U.addToList(&UseList); }
ConstantVectorVal, // This is an instance of ConstantVector
ConstantPointerNullVal, // This is an instance of ConstantPointerNull
InlineAsmVal, // This is an instance of InlineAsm
+ PseudoSourceValueVal, // This is an instance of PseudoSourceValue
InstructionVal, // This is an instance of Instruction
// Markers:
/// getRawType - This should only be used to implement the vmcore library.
///
- const Type *getRawType() const { return Ty.getRawType(); }
+ 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.
+ 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.
+ Value *getUnderlyingObject();
+ const Value *getUnderlyingObject() const {
+ return const_cast<Value*>(this)->getUnderlyingObject();
+ }
};
inline std::ostream &operator<<(std::ostream &OS, const Value &V) {
V.print(OS);
return OS;
}
-
-void Use::init(Value *v, User *user) {
- Val = v;
- U = user;
- if (Val) Val->addUse(*this);
-}
-
-Use::~Use() {
- if (Val) removeFromList();
+inline raw_ostream &operator<<(raw_ostream &OS, const Value &V) {
+ V.print(OS);
+ return OS;
}
-
+
void Use::set(Value *V) {
if (Val) removeFromList();
Val = V;
return Val.getValueID() == Value::GlobalAliasVal;
}
template <> inline bool isa_impl<GlobalValue, Value>(const Value &Val) {
- return isa<GlobalVariable>(Val) || isa<Function>(Val) || isa<GlobalAlias>(Val);
+ return isa<GlobalVariable>(Val) || isa<Function>(Val) ||
+ isa<GlobalAlias>(Val);
}
} // End llvm namespace
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