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[/] [openrisc/] [trunk/] [gnu-old/] [gcc-4.2.2/] [gcc/] [testsuite/] [gcc.dg/] [duff-4.c] - Rev 856
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/* Duff's device is legal C; test to make sure the compiler doesn't complain about it. Roger Sayle <roger@eyesopen.com> Derived from duff-2.c. */ /* { dg-do run } */ /* { dg-options "-O2" } */ extern void abort (void); extern void exit (int); #if __INT_MAX__ >= 2147483647 /* At least 32-bit integers. */ typedef int type32; #else typedef long type32; #endif type32 cksum (const unsigned char *src, unsigned long size) { type32 ck = 0; switch (size & 3) { do { case 0: ck ^= (type32)*src++ << 24; --size; case 3: ck ^= (type32)*src++ << 16; --size; case 2: ck ^= (type32)*src++ << 8; --size; case 1: ck ^= (type32)*src++; --size; } while (size > 0); } return ck; } const char testpat[] = "The quick brown fox jumped over the lazy dog."; int main() { type32 ck; ck = cksum ((const unsigned char *) testpat, sizeof (testpat)); if (ck != 925902908) abort (); exit (0); }
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