alloc-pool.c (align_four): Kill.

	* alloc-pool.c (align_four): Kill.
	(create_alloc_pool): Align size to eight.
	(free_alloc_pool, free_pool): Invalidate deallocated data.

From-SVN: r76456

gcc/ChangeLog

+2004-01-23  Jan Hubicka  <jh@suse.cz>
+
+	* alloc-pool.c (align_four): Kill.
+	(create_alloc_pool): Align size to eight.
+	(free_alloc_pool, free_pool): Invalidate deallocated data.
+
 2004-01-23  Ian Lance Taylor  <ian@wasabisystems.com>
 
 	PR gcc/1532

gcc/alloc-pool.c

@@ -34,7 +34,6 @@ extern void fancy_abort (const char *, int, const char *)
     ATTRIBUTE_NORETURN;
 #define abort() fancy_abort (__FILE__, __LINE__, __FUNCTION__)
 
-#define align_four(x) (((x+3) >> 2) << 2)
 #define align_eight(x) (((x+7) >> 3) << 3)
 
 /* The internal allocation object.  */
@@ -90,7 +89,7 @@ create_alloc_pool (const char *name, size_t size, size_t num)
     size = sizeof (alloc_pool_list);
 
   /* Now align the size to a multiple of 4.  */
-  size = align_four (size);
+  size = align_eight (size);
 
 #ifdef ENABLE_CHECKING
   /* Add the aligned size of ID.  */
@@ -154,6 +153,9 @@ free_alloc_pool (alloc_pool pool)
     }
   /* Lastly, free the pool and the name.  */
   free (pool->name);
+#ifdef ENABLE_CHECKING
+  memset (pool, 0xaf, sizeof (*pool));
+#endif
   free (pool);
 }
 
@@ -225,6 +227,8 @@ pool_free (alloc_pool pool, void *ptr)
   if (!ptr)
     abort ();
 
+  memset (ptr, 0xaf, pool->elt_size - offsetof (allocation_object, u.data));
+
   /* Check whether the PTR was allocated from POOL.  */
   if (pool->id != ALLOCATION_OBJECT_PTR_FROM_USER_PTR (ptr)->id)
     abort ();