| /* Verify that memchr calls with the address of a constant character |
| are folded as expected even at -O0. |
| { dg-do compile } |
| { dg-options "-O0 -Wall -fdump-tree-gimple" } */ |
| |
| typedef __SIZE_TYPE__ size_t; |
| typedef __WCHAR_TYPE__ wchar_t; |
| |
| extern void* memchr (const void*, int, size_t); |
| extern int printf (const char*, ...); |
| extern void abort (void); |
| |
| #define A(expr) \ |
| ((expr) \ |
| ? (void)0 \ |
| : (printf ("assertion failed on line %i: %s\n", \ |
| __LINE__, #expr), \ |
| abort ())) |
| |
| const char nul = 0; |
| const char cha = 'a'; |
| |
| const struct |
| { |
| char c; |
| } snul = { 0 }, |
| schb = { 'b' }, |
| sarr[] = { |
| { 0 }, |
| { 'c' } |
| }; |
| |
| |
| void test_memchr_cst_char (void) |
| { |
| A (&nul == memchr (&nul, 0, 1)); |
| A (!memchr (&nul, 'a', 1)); |
| |
| A (&cha == memchr (&cha, 'a', 1)); |
| A (!memchr (&cha, 0, 1)); |
| |
| A (&snul.c == memchr (&snul.c, 0, 1)); |
| A (!memchr (&snul.c, 'a', 1)); |
| |
| A (&schb.c == memchr (&schb.c, 'b', 1)); |
| A (!memchr (&schb.c, 0, 1)); |
| |
| A (&sarr[0].c == memchr (&sarr[0].c, 0, 1)); |
| A (!memchr (&sarr[0].c, 'a', 1)); |
| |
| A (&sarr[1].c == memchr (&sarr[1].c, 'c', 1)); |
| A (!memchr (&sarr[1].c, 0, 1)); |
| } |
| |
| /* { dg-final { scan-tree-dump-not "abort" "gimple" } } */ |