summaryrefslogtreecommitdiff
path: root/tests/test-stdalign.c
diff options
context:
space:
mode:
Diffstat (limited to 'tests/test-stdalign.c')
-rw-r--r--tests/test-stdalign.c116
1 files changed, 116 insertions, 0 deletions
diff --git a/tests/test-stdalign.c b/tests/test-stdalign.c
new file mode 100644
index 00000000..68b9ef15
--- /dev/null
+++ b/tests/test-stdalign.c
@@ -0,0 +1,116 @@
+/* Test of <stdalign.h>.
+ Copyright 2009-2015 Free Software Foundation, Inc.
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+/* Written by Paul Eggert, inspired by Bruno Haible's test-alignof.c. */
+
+#include <config.h>
+
+#include <stdalign.h>
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include "verify.h"
+
+#include "macros.h"
+
+typedef long double longdouble;
+typedef struct { char a[1]; } struct1;
+typedef struct { char a[2]; } struct2;
+typedef struct { char a[3]; } struct3;
+typedef struct { char a[4]; } struct4;
+
+verify (__alignof_is_defined == 1);
+#ifndef alignof
+# error "alignof is not a macro"
+#endif
+
+#if __alignas_is_defined
+verify (__alignas_is_defined == 1);
+# ifndef alignas
+# error "alignas is not a macro"
+# endif
+/* mingw can go up only to 8. 8 is all that GNU Emacs needs, so let's
+ limit the test to 8 for now. */
+# define TEST_ALIGNMENT 8
+#else
+# define _Alignas(alignment)
+# define alignas(alignment)
+# define TEST_ALIGNMENT 1
+#endif
+
+#define CHECK_STATIC(type) \
+ typedef struct { char slot1; type slot2; } type##_helper; \
+ verify (alignof (type) == offsetof (type##_helper, slot2)); \
+ verify (_Alignof (type) == alignof (type)); \
+ const int type##_alignment = alignof (type); \
+ type alignas (TEST_ALIGNMENT) static_##type##_alignas; \
+ type _Alignas (TEST_ALIGNMENT) static_##type##_Alignas
+
+#define CHECK_ALIGNED(var) ASSERT ((uintptr_t) &(var) % TEST_ALIGNMENT == 0)
+
+CHECK_STATIC (char);
+CHECK_STATIC (short);
+CHECK_STATIC (int);
+CHECK_STATIC (long);
+#ifdef INT64_MAX
+CHECK_STATIC (int64_t);
+#endif
+CHECK_STATIC (float);
+CHECK_STATIC (double);
+/* CHECK_STATIC (longdouble); */
+CHECK_STATIC (struct1);
+CHECK_STATIC (struct2);
+CHECK_STATIC (struct3);
+CHECK_STATIC (struct4);
+
+int
+main ()
+{
+#if defined __SUNPRO_C
+ /* Avoid a test failure due to Sun Studio Developer Bug Report #2125432. */
+ fputs ("Skipping test: known Sun C compiler bug\n", stderr);
+ return 77;
+#else
+ CHECK_ALIGNED (static_char_alignas);
+ CHECK_ALIGNED (static_char_Alignas);
+ CHECK_ALIGNED (static_short_alignas);
+ CHECK_ALIGNED (static_short_Alignas);
+ CHECK_ALIGNED (static_int_alignas);
+ CHECK_ALIGNED (static_int_Alignas);
+ CHECK_ALIGNED (static_long_alignas);
+ CHECK_ALIGNED (static_long_Alignas);
+# ifdef INT64_MAX
+ CHECK_ALIGNED (static_int64_t_alignas);
+ CHECK_ALIGNED (static_int64_t_Alignas);
+# endif
+ CHECK_ALIGNED (static_float_alignas);
+ CHECK_ALIGNED (static_float_Alignas);
+ CHECK_ALIGNED (static_double_alignas);
+ CHECK_ALIGNED (static_double_Alignas);
+ /* CHECK_ALIGNED (static_longdouble_alignas); */
+ /* CHECK_ALIGNED (static_longdouble_Alignas); */
+ CHECK_ALIGNED (static_struct1_alignas);
+ CHECK_ALIGNED (static_struct1_Alignas);
+ CHECK_ALIGNED (static_struct2_alignas);
+ CHECK_ALIGNED (static_struct2_Alignas);
+ CHECK_ALIGNED (static_struct3_alignas);
+ CHECK_ALIGNED (static_struct3_Alignas);
+ CHECK_ALIGNED (static_struct4_alignas);
+ CHECK_ALIGNED (static_struct4_Alignas);
+ return 0;
+#endif
+}