| Peter Collingbourne | 49d29ed | 2013-10-20 21:29:32 +0000 | [diff] [blame^] | 1 | // RUN: %clangxx -fsanitize=unsigned-integer-overflow %s -o %t && %t 2>&1 | FileCheck %s |
| Will Dietz | 80af605 | 2012-11-27 15:01:43 +0000 | [diff] [blame] | 2 | |
| 3 | #include <stdint.h> |
| 4 | |
| 5 | int main() { |
| 6 | // These promote to 'int'. |
| 7 | (void)(int8_t(-2) * int8_t(0x7f)); |
| 8 | (void)(int16_t(0x7fff) * int16_t(0x7fff)); |
| 9 | (void)(uint16_t(0xffff) * int16_t(0x7fff)); |
| 10 | (void)(uint16_t(0xffff) * uint16_t(0x8000)); |
| 11 | |
| 12 | // Not an unsigned overflow |
| 13 | (void)(uint16_t(0xffff) * uint16_t(0x8001)); |
| 14 | |
| 15 | (void)(uint32_t(0xffffffff) * uint32_t(0x2)); |
| Will Dietz | 7cbd7e5 | 2012-12-02 18:43:33 +0000 | [diff] [blame] | 16 | // CHECK: umul-overflow.cpp:15:31: runtime error: unsigned integer overflow: 4294967295 * 2 cannot be represented in type 'unsigned int' |
| Will Dietz | 80af605 | 2012-11-27 15:01:43 +0000 | [diff] [blame] | 17 | |
| 18 | return 0; |
| 19 | } |