gnu / gcc / refs/heads/devel/c++-contracts / . / gcc / testsuite / c-c++-common / Wxor-used-as-pow-1.c

/* The precise output depends of sizeof(int) and sizeof(long long), so | |

filter by target. */ | |

/* { dg-do compile { target i?86-*-* x86_64-*-* } } */ | |

/* Apparent uses of ^ for powers of 2. */ | |

short t2_16 = 2^16; /* { dg-warning "result of '2\\^16' is 18; did you mean '1 << 16' \\(65536\\)\\? \\\[-Wxor-used-as-pow\\\]" } */ | |

int t2_17 = 2^17; /* { dg-warning "result of '2\\^17' is 19; did you mean '1 << 17' \\(131072\\)\\?" } */ | |

int t2_30 = 2^30; /* { dg-warning "result of '2\\^30' is 28; did you mean '1 << 30' \\(1073741824\\)\\?" } */ | |

/* Should be 1LL at 31 and above, due to overflow. */ | |

int t2_31 = 2^31; /* { dg-warning "result of '2\\^31' is 29; did you mean '1LL << 31'\\?" } */ | |

int t2_32 = 2^32; /* { dg-warning "result of '2\\^32' is 34; did you mean '1LL << 32'\\?" } */ | |

long t2_63 = 2^63; /* { dg-warning "result of '2\\^63' is 61; did you mean exponentiation\\?" } */ | |

long t2_64 = 2^64; /* { dg-warning "result of '2\\^64' is 66; did you mean exponentiation\\?" } */ | |

/* ...but don't warn when RHS is large enough. */ | |

long t2_65 = 2^65; | |

long t2_127 = 2^127; | |

long t2_128 = 2^128; | |

long t2_129 = 2^129; | |

/* Verify that -Wxor-used-as-pow happens before folding. */ | |

long t2_32_m1 = ((2^32)-1); /* { dg-warning "result of '2\\^32' is 34; did you mean '1LL << 32'\\?" } */ | |

/* Apparent uses of ^ for powers of 10. */ | |

long t10_2 = 10^2; /* { dg-warning "result of '10\\^2' is 8; did you mean '1e2'\\?" } */ | |

long t10_9 = 10^9; /* { dg-warning "result of '10\\^9' is 3; did you mean '1e9'\\?" } */ | |

long t10_10 = 10^10; /* { dg-warning "result of '10\\^10' is 0; did you mean '1e10'\\?" } */ | |

long t10_100 = 10^100; /* { dg-warning "result of '10\\^100' is 110; did you mean '1e100'\\?" } */ | |

/* Don't warn on negatives. */ | |

long tm2_2 = -2^2; | |

long t2_m2 = 2^-2; | |

long tm10_10 = -10^10; | |

long t10_m10 = 10^-10; | |

/* If LHS is not 2 or 10, we shouldn't complain. */ | |

int t0_0 = 0 ^ 0; | |

int t6_7 = 6 ^ 7; | |

/* Floating point is already covered by type-checking. */ | |

float f10_10 = 10.f^10; /* { dg-error "invalid operands to binary \\^ \\(have 'float' and 'int'\\)" "" { target c } } */ | |

/* { dg-error "invalid operands of types 'float' and 'int' to binary 'operator\\^'" "" { target c++ } .-1 } */ | |

/* Don't complain if the LHS isn't literal decimal 2 or 10. */ | |

int t1p1_16 = (1 + 1) ^ 16; | |

int t5p5_6 = (5 + 5) ^ 6; | |

int h2_8 = 0x2 ^ 8; | |

int h10_3 = 0xa ^ 3; | |

/* Don't complain if the RHS isn't literal decimal. */ | |

int t2_x16 = 2^0x10; | |

int h10_x3 = 10 ^ 0x3; |