#include "llvm/AbstractTypeUser.h"
#include "llvm/Use.h"
-#include "Support/Casting.h"
-#include <iostream>
+#include "llvm/Support/Casting.h"
+#include <string>
namespace llvm {
class Constant;
class Argument;
class Instruction;
-struct BasicBlock;
+class BasicBlock;
class GlobalValue;
class Function;
class GlobalVariable;
/// Value - The base class of all values computed by a program that may be used
/// as operands to other values.
///
-struct Value {
- enum ValueTy {
- TypeVal, // This is an instance of Type
- ConstantVal, // This is an instance of Constant
- ArgumentVal, // This is an instance of Argument
- InstructionVal, // This is an instance of Instruction
- BasicBlockVal, // This is an instance of BasicBlock
- FunctionVal, // This is an instance of Function
- GlobalVariableVal, // This is an instance of GlobalVariable
- };
-
+class Value {
private:
+ unsigned SubclassID; // Subclass identifier (for isa/dyn_cast)
+ PATypeHolder Ty;
iplist<Use> Uses;
std::string Name;
- PATypeHolder Ty;
- ValueTy VTy;
void operator=(const Value &); // Do not implement
Value(const Value &); // Do not implement
+
public:
- Value(const Type *Ty, ValueTy vty, const std::string &name = "");
+ Value(const Type *Ty, unsigned scid, const std::string &name = "");
virtual ~Value();
/// dump - Support for debugging, callable in GDB: V->dump()
Name = name;
}
- /// getValueType - Return the immediate subclass of this Value.
- ///
- inline ValueTy getValueType() const { return VTy; }
-
/// replaceAllUsesWith - Go through the uses list for this definition and make
/// each use point to "V" instead of "this". After this completes, 'this's
/// use list is guaranteed to be empty.
//
typedef UseListIteratorWrapper use_iterator;
typedef UseListConstIteratorWrapper use_const_iterator;
+ typedef iplist<Use>::size_type size_type;
- unsigned use_size() const { return Uses.size(); }
+ size_type use_size() const { return Uses.size(); }
bool use_empty() const { return Uses.empty(); }
use_iterator use_begin() { return Uses.begin(); }
use_const_iterator use_begin() const { return Uses.begin(); }
///
void addUse(Use &U) { Uses.push_back(&U); }
void killUse(Use &U) { Uses.remove(&U); }
-};
-inline std::ostream &operator<<(std::ostream &OS, const Value *V) {
- if (V == 0)
- OS << "<null> value!\n";
- else
- V->print(OS);
- return OS;
-}
+ /// getValueType - Return an ID for the concrete type of this object. This is
+ /// used to implement the classof checks. This should not be used for any
+ /// other purpose, as the values may change as LLVM evolves. Also, note that
+ /// starting with the InstructionVal value, the value stored is actually the
+ /// Instruction opcode, so there are more than just these values possible here
+ /// (and Instruction must be last).
+ ///
+ enum ValueTy {
+ ArgumentVal, // This is an instance of Argument
+ BasicBlockVal, // This is an instance of BasicBlock
+ FunctionVal, // This is an instance of Function
+ GlobalVariableVal, // This is an instance of GlobalVariable
+ UndefValueVal, // This is an instance of UndefValue
+ ConstantExprVal, // This is an instance of ConstantExpr
+ ConstantAggregateZeroVal, // This is an instance of ConstantAggregateNull
+ SimpleConstantVal, // This is some other type of Constant
+ InstructionVal, // This is an instance of Instruction
+ ValueListVal // This is for bcreader, a special ValTy
+ };
+ unsigned getValueType() const {
+ return SubclassID;
+ }
+
+ // Methods for support type inquiry through isa, cast, and dyn_cast:
+ static inline bool classof(const Value *V) {
+ return true; // Values are always values.
+ }
+
+ /// getRawType - This should only be used to implement the vmcore library.
+ ///
+ const Type *getRawType() const { return Ty.getRawType(); }
+
+private:
+ /// FIXME: this is a gross hack, needed by another gross hack. Eliminate!
+ void setValueType(unsigned VT) { SubclassID = VT; }
+ friend class Instruction;
+};
inline std::ostream &operator<<(std::ostream &OS, const Value &V) {
V.print(OS);
// 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<Type, Value>(const Value &Val) {
- return Val.getValueType() == Value::TypeVal;
-}
template <> inline bool isa_impl<Constant, Value>(const Value &Val) {
- return Val.getValueType() == Value::ConstantVal;
+ return Val.getValueType() == Value::SimpleConstantVal ||
+ Val.getValueType() == Value::FunctionVal ||
+ Val.getValueType() == Value::GlobalVariableVal ||
+ Val.getValueType() == Value::ConstantExprVal ||
+ Val.getValueType() == Value::ConstantAggregateZeroVal ||
+ Val.getValueType() == Value::UndefValueVal;
}
template <> inline bool isa_impl<Argument, Value>(const Value &Val) {
return Val.getValueType() == Value::ArgumentVal;
}
template <> inline bool isa_impl<Instruction, Value>(const Value &Val) {
- return Val.getValueType() == Value::InstructionVal;
+ return Val.getValueType() >= Value::InstructionVal;
}
template <> inline bool isa_impl<BasicBlock, Value>(const Value &Val) {
return Val.getValueType() == Value::BasicBlockVal;
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