| /* PR c/100920 */ |
| /* Testcase by George Thopas <george.thopas@gmail.com> */ |
| |
| /* { dg-do compile } */ |
| /* { dg-require-effective-target alloca } */ |
| |
| #include <stddef.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ |
| #define REV_ENDIANNESS __attribute__((scalar_storage_order("big-endian"))) |
| #else |
| #define REV_ENDIANNESS __attribute__((scalar_storage_order("little-endian"))) |
| #endif |
| |
| struct s_1 { |
| int val; |
| } REV_ENDIANNESS; |
| |
| typedef struct s_1 t_1; |
| |
| struct s_2 { |
| char val; |
| } REV_ENDIANNESS; |
| |
| typedef struct s_2 t_2; |
| |
| struct s12 { |
| t_1 a[1]; |
| t_2 b[1]; |
| } REV_ENDIANNESS; |
| |
| typedef struct s12 t_s12; |
| |
| union u12 { |
| t_1 a[1]; |
| t_2 b[1]; |
| } REV_ENDIANNESS; |
| |
| typedef union u12 t_u12; |
| |
| int main(void) |
| { |
| t_s12 *msg1 = __builtin_alloca(10); |
| t_u12 *msg2 = __builtin_alloca(10); |
| int same; |
| |
| msg1 = malloc (sizeof (t_s12)); |
| msg2 = malloc (sizeof (t_s12)); |
| |
| memset (msg1, 0, sizeof (t_s12)); |
| memcpy (msg2, msg1, sizeof (t_s12)); |
| same = memcmp (msg1, msg2, sizeof (t_s12)); |
| |
| return 0; |
| } |