| Chih-Hung Hsieh | 43f0694 | 2019-12-19 15:01:08 -0800 | [diff] [blame^] | 1 | // RUN: %clangxx -DADD_I32 -fsanitize=unsigned-integer-overflow %s -o %t1 && %run %t1 2>&1 | FileCheck %s --check-prefix=CHECK-ADD_I32 |
| 2 | // RUN: %clangxx -DADD_I64 -fsanitize=unsigned-integer-overflow %s -o %t2 && %run %t2 2>&1 | FileCheck %s --check-prefix=CHECK-ADD_I64 |
| 3 | // RUN: %clangxx -DADD_I128 -fsanitize=unsigned-integer-overflow %s -o %t3 && %run %t3 2>&1 | FileCheck %s --check-prefix=CHECK-ADD_I128 |
| 4 | |
| 5 | #include <stdint.h> |
| 6 | #include <stdio.h> |
| 7 | |
| 8 | int main() { |
| 9 | // These promote to 'int'. |
| 10 | (void)(uint8_t(0xff) + uint8_t(0xff)); |
| 11 | (void)(uint16_t(0xf0fff) + uint16_t(0x0fff)); |
| 12 | |
| 13 | #ifdef ADD_I32 |
| 14 | uint32_t k = 0x87654321; |
| 15 | k += 0xedcba987; |
| 16 | // CHECK-ADD_I32: uadd-overflow.cpp:[[@LINE-1]]:5: runtime error: unsigned integer overflow: 2271560481 + 3989547399 cannot be represented in type 'unsigned int' |
| 17 | #endif |
| 18 | |
| 19 | #ifdef ADD_I64 |
| 20 | (void)(uint64_t(10000000000000000000ull) + uint64_t(9000000000000000000ull)); |
| 21 | // CHECK-ADD_I64: 10000000000000000000 + 9000000000000000000 cannot be represented in type 'unsigned {{long( long)?}}' |
| 22 | #endif |
| 23 | |
| 24 | #ifdef ADD_I128 |
| 25 | # if defined(__SIZEOF_INT128__) && !defined(_WIN32) |
| 26 | (void)((__uint128_t(1) << 127) + (__uint128_t(1) << 127)); |
| 27 | # else |
| 28 | puts("__int128 not supported"); |
| 29 | # endif |
| 30 | // CHECK-ADD_I128: {{0x80000000000000000000000000000000 \+ 0x80000000000000000000000000000000 cannot be represented in type 'unsigned __int128'|__int128 not supported}} |
| 31 | #endif |
| 32 | } |
