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[/] [openrisc/] [trunk/] [gnu-old/] [gcc-4.2.2/] [gcc/] [testsuite/] [gcc.dg/] [20030711-1.c] - Rev 154
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/* Test whether strncmp has not been "optimized" into memcmp nor any code with memcmp semantics. */ /* { dg-do run { target i?86-*-linux* x86_64-*-linux* ia64-*-linux* alpha*-*-linux* powerpc*-*-linux* s390*-*-linux* sparc*-*-linux* *-*-darwin* } } */ /* { dg-options "-O2" } */ #include <stddef.h> #include <stdio.h> #include <sys/mman.h> #ifndef MAP_ANONYMOUS #define MAP_ANONYMOUS MAP_ANON #endif #include <stdlib.h> void __attribute__((noinline)) test (const char *p) { if (__builtin_strncmp (p, "abcdefghijklmnopq", 17) == 0) abort (); } int main (void) { char *p = mmap (NULL, 131072, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); if (p == MAP_FAILED) return 0; if (munmap (p + 65536, 65536) < 0) return 0; __builtin_memcpy (p + 65536 - 5, "abcd", 5); test (p + 65536 - 5); return 0; }
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