//
// The LLVM Compiler Infrastructure
//
-// This file was developed by Ted Kremenek and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
#ifndef LLVM_SUPPORT_ALIGNOF_H
#define LLVM_SUPPORT_ALIGNOF_H
-#include <cassert>
-
namespace llvm {
-
+
template <typename T>
struct AlignmentCalcImpl {
char x;
private:
AlignmentCalcImpl() {} // Never instantiate.
};
-
+
/// AlignOf - A templated class that contains an enum value representing
/// the alignment of the template argument. For example,
/// AlignOf<int>::Alignment represents the alignment of type "int". The
/// compile-time constant (e.g., for template instantiation).
template <typename T>
struct AlignOf {
- enum { Alignment = sizeof(AlignmentCalcImpl<T>) - sizeof(T) };
+ enum { Alignment =
+ static_cast<unsigned int>(sizeof(AlignmentCalcImpl<T>) - sizeof(T)) };
+
+ enum { Alignment_GreaterEqual_2Bytes = Alignment >= 2 ? 1 : 0 };
+ enum { Alignment_GreaterEqual_4Bytes = Alignment >= 4 ? 1 : 0 };
+ enum { Alignment_GreaterEqual_8Bytes = Alignment >= 8 ? 1 : 0 };
+ enum { Alignment_GreaterEqual_16Bytes = Alignment >= 16 ? 1 : 0 };
+
+ enum { Alignment_LessEqual_2Bytes = Alignment <= 2 ? 1 : 0 };
+ enum { Alignment_LessEqual_4Bytes = Alignment <= 4 ? 1 : 0 };
+ enum { Alignment_LessEqual_8Bytes = Alignment <= 8 ? 1 : 0 };
+ enum { Alignment_LessEqual_16Bytes = Alignment <= 16 ? 1 : 0 };
+
};
/// alignof - A templated function that returns the mininum alignment of
/// alignof<int>() returns the alignment of an int.
template <typename T>
static inline unsigned alignof() { return AlignOf<T>::Alignment; }
-
+
} // end namespace llvm
#endif