/* bug #2395: Bitwise operators with a boolean expression fail when optimized */ #include #include #include unsigned char a, b; unsigned char c = 199; unsigned char d = 100; int main(void) { int fails = 0; a = c ^ (d != 0); b = c ^ 1; printf("%u ^ (%u != 0) => %u\n", c, d, a); if (a != b) { printf("XOR error: a %d instead of %d\n", a, b); fails++; } a = c | (d != 0); b = c | 1; printf("%u | (%u != 0) => %u\n", c, d, a); if (a != b) { printf("OR error: a %d instead of %d\n", a, b); fails++; } a = c & (d != 0); b = c & 1; printf("%u & (%u != 0) => %u\n", c, d, a); if (a != b) { printf("AND error: a %d instead of %d\n", a, b); fails++; } printf("%d errors\n", fails); #ifdef __OPT__ return fails; #else /* Force exit failure on non-optimised version, which works, * otherwise it breaks the build */ return 1; #endif }