#include "llvm/OperandTraits.h"
#include "llvm/ADT/APInt.h"
#include "llvm/ADT/APFloat.h"
-#include "llvm/ADT/SmallVector.h"
#include <vector>
namespace llvm {
struct ConstantCreator;
template<class ConstantClass, class TypeClass>
struct ConvertConstantType;
+template<typename T, unsigned N>
+class SmallVector;
//===----------------------------------------------------------------------===//
/// This is the shared class of boolean and integer constants. This class
return Val.isZero() && Val.isNegative();
}
+ /// isZero - Return true if the value is positive or negative zero.
+ bool isZero() const { return Val.isZero(); }
+
+ /// isNaN - Return true if the value is a NaN.
+ bool isNaN() const { return Val.isNaN(); }
+
/// isExactlyValue - We don't rely on operator== working on double values, as
/// it returns true for things that are clearly not equal, like -0.0 and 0.0.
/// As such, this method can be used to do an exact bit-for-bit comparison of
DEFINE_TRANSPARENT_CASTED_OPERAND_ACCESSORS(ConstantStruct, Constant)
+
//===----------------------------------------------------------------------===//
/// ConstantVector - Constant Vector Declarations
///
// ConstantExpr class, because they will attempt to fold the constant
// expression into something simpler if possible.
- /// Cast constant expr
- ///
-
/// getAlignOf constant expr - computes the alignment of a type in a target
- /// independent way (Note: the return type is an i32; Note: assumes that i8
- /// is byte aligned).
+ /// independent way (Note: the return type is an i64).
static Constant *getAlignOf(const Type* Ty);
- /// getSizeOf constant expr - computes the size of a type in a target
- /// independent way (Note: the return type is an i64).
+ /// getSizeOf constant expr - computes the (alloc) size of a type (in
+ /// address-units, not bits) in a target independent way (Note: the return
+ /// type is an i64).
///
static Constant *getSizeOf(const Type* Ty);
- /// getOffsetOf constant expr - computes the offset of a field in a target
- /// independent way (Note: the return type is an i64).
+ /// getOffsetOf constant expr - computes the offset of a struct field in a
+ /// target independent way (Note: the return type is an i64).
+ ///
+ static Constant *getOffsetOf(const StructType* STy, unsigned FieldNo);
+
+ /// getOffsetOf constant expr - This is a generalized form of getOffsetOf,
+ /// which supports any aggregate type, and any Constant index.
///
- static Constant *getOffsetOf(const StructType* Ty, unsigned FieldNo);
+ static Constant *getOffsetOf(const Type* Ty, Constant *FieldNo);
static Constant *getNeg(Constant *C);
static Constant *getFNeg(Constant *C);
static Constant *getBitCast (Constant *C, const Type *Ty);
static Constant *getNSWNeg(Constant *C);
+ static Constant *getNUWNeg(Constant *C);
static Constant *getNSWAdd(Constant *C1, Constant *C2);
+ static Constant *getNUWAdd(Constant *C1, Constant *C2);
static Constant *getNSWSub(Constant *C1, Constant *C2);
+ static Constant *getNUWSub(Constant *C1, Constant *C2);
static Constant *getNSWMul(Constant *C1, Constant *C2);
+ static Constant *getNUWMul(Constant *C1, Constant *C2);
static Constant *getExactSDiv(Constant *C1, Constant *C2);
/// Transparently provide more efficient getOperand methods.
/// UndefValue - 'undef' values are things that do not have specified contents.
/// These are used for a variety of purposes, including global variable
/// initializers and operands to instructions. 'undef' values can occur with
-/// any type.
+/// any first-class type.
+///
+/// Undef values aren't exactly constants; if they have multiple uses, they
+/// can appear to have different bit patterns at each use. See
+/// LangRef.html#undefvalues for details.
///
class UndefValue : public Constant {
friend struct ConstantCreator<UndefValue, Type, char>;
return V->getValueID() == UndefValueVal;
}
};
+
} // End llvm namespace
#endif