Factor code out of APInt to form a isUIntN helper function.

[oota-llvm.git] / include / llvm / Support / AlignOf.h

diff --git a/include/llvm/Support/AlignOf.h b/include/llvm/Support/AlignOf.h
index 4ee5ea230dda1bf7847c6b4c690dd3222f94673e..979e5975aa001a310d33eece7c0bf05b15a20888 100644 (file)
--- a/include/llvm/Support/AlignOf.h
+++ b/include/llvm/Support/AlignOf.h
@@ -2,8 +2,8 @@
 //
 //                     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.
 //
 //===----------------------------------------------------------------------===//
 //
@@ -16,7 +16,7 @@
 #define LLVM_SUPPORT_ALIGNOF_H
 
 namespace llvm {
-  
+
 template <typename T>
 struct AlignmentCalcImpl {
   char x;
@@ -24,7 +24,7 @@ struct AlignmentCalcImpl {
 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
@@ -34,15 +34,27 @@ private:
 ///  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 - A templated function that returns the mininum alignment of
 ///  of a type.  This provides no extra functionality beyond the AlignOf
 ///  class besides some cosmetic cleanliness.  Example usage:
-///  alignof<int>() returns the alignment of an int.
+///  alignOf<int>() returns the alignment of an int.
 template <typename T>
-static inline unsigned alignof() { return AlignOf<T>::Alignment; }
-  
+static inline unsigned alignOf() { return AlignOf<T>::Alignment; }
+
 } // end namespace llvm
 #endif