added a callback function to check whether a given entity is a allocation call

[libfirm] / ir / adt / util.h

diff --git a/ir/adt/util.h b/ir/adt/util.h
index d382540..6730c44 100644 (file)
--- a/ir/adt/util.h
+++ b/ir/adt/util.h
@@ -1,16 +1,32 @@
+/*
+ * Copyright (C) 1995-2007 University of Karlsruhe.  All right reserved.
+ *
+ * This file is part of libFirm.
+ *
+ * This file may be distributed and/or modified under the terms of the
+ * GNU General Public License version 2 as published by the Free Software
+ * Foundation and appearing in the file LICENSE.GPL included in the
+ * packaging of this file.
+ *
+ * Licensees holding valid libFirm Professional Edition licenses may use
+ * this file in accordance with the libFirm Commercial License.
+ * Agreement provided with the Software.
+ *
+ * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
+ * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE.
+ */
+
 /**
- * @file   util.h
+ * @file
  * @date   31.05.2005
  * @author Sebastian Hack
- *
- * Some utility macros.
- *
- * Copyright (C) 2005 Universitaet Karlsruhe
- * Released under the GPL
+ * @brief  Some utility macros.
  */
+#ifndef FIRM_ADT_UTIL_H
+#define FIRM_ADT_UTIL_H
 
-#ifndef _UTIL_H
-#define _UTIL_H
+#include "firm_config.h"
 
 /**
  * Get the offset of a member of a struct.
@@ -39,4 +55,32 @@
 #define array_size(arr) \
   (sizeof(arr) / sizeof((arr)[0]))
 
-#endif /* _UTIL_H */
+/**
+ * Asserts that the constant expression x is not zero at compiletime. name has
+ * to be a unique identifier.
+ *
+ * @note This uses the fact, that double case labels are not allowed.
+ */
+#define COMPILETIME_ASSERT(x, name) \
+    static __attribute__((unused)) void compiletime_assert_##name (int h) { \
+        switch(h) { case 0: case (x): ; } \
+    }
+
+#ifdef __GNUC__
+/**
+ * Indicates to the compiler that the value of x is very likely 1
+ * @note Only use this in speed critical code and when you are sure x is often 1
+ */
+#define LIKELY(x)   __builtin_expect((x), 1)
+
+/**
+ * Indicates to the compiler that it's very likely that x is 0
+ * @note Only use this in speed critical code and when you are sure x is often 0
+ */
+#define UNLIKELY(x) __builtin_expect((x), 0)
+#else
+#define LIKELY(x)   x
+#define UNLIKELY(x) x
+#endif
+
+#endif