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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.5.1/] [gcc/] [testsuite/] [gcc.dg/] [20050826-1.c] - Rev 307
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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> /* Darwin spells this differently */ #ifndef MAP_ANONYMOUS #define MAP_ANONYMOUS MAP_ANON #endif #include <stdlib.h> struct Flags { int filler[18]; unsigned int a:14; unsigned int b:14; unsigned int c:1; unsigned int d:1; unsigned int e:1; unsigned int f:1; }; static void __attribute__((noinline)) set (struct Flags *); static void set (struct Flags *fp) { fp->b = 5; fp->d = 1; } static int __attribute__((noinline)) bar (int); static int bar(int x) { return !(x==1); } int main (void) { char *p = mmap (NULL, 131072, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); struct Flags *fp; if (p == MAP_FAILED) return 0; if (munmap (p + 65536, 65536) < 0) return 0; fp = (struct Flags*)(p + 65536 - sizeof(struct Flags)); set(fp); if (fp->b > 0) return (bar(fp->d)); return 1; }
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