1*b8aae540SGreg Fitzgerald // RUN: %clangxx -fsanitize=unsigned-integer-overflow %s -o %t && %run %t 2>&1 | FileCheck %s 2ba869e79SAlexey Samsonov 3ba869e79SAlexey Samsonov #include <stdint.h> 4ba869e79SAlexey Samsonov main()5ba869e79SAlexey Samsonovint main() { 6ba869e79SAlexey Samsonov // These promote to 'int'. 7ba869e79SAlexey Samsonov (void)(int8_t(-2) * int8_t(0x7f)); 8ba869e79SAlexey Samsonov (void)(int16_t(0x7fff) * int16_t(0x7fff)); 9ba869e79SAlexey Samsonov (void)(uint16_t(0xffff) * int16_t(0x7fff)); 10ba869e79SAlexey Samsonov (void)(uint16_t(0xffff) * uint16_t(0x8000)); 11ba869e79SAlexey Samsonov 12ba869e79SAlexey Samsonov // Not an unsigned overflow 13ba869e79SAlexey Samsonov (void)(uint16_t(0xffff) * uint16_t(0x8001)); 14ba869e79SAlexey Samsonov 15ba869e79SAlexey Samsonov (void)(uint32_t(0xffffffff) * uint32_t(0x2)); 16ba869e79SAlexey Samsonov // CHECK: umul-overflow.cpp:15:31: runtime error: unsigned integer overflow: 4294967295 * 2 cannot be represented in type 'unsigned int' 17ba869e79SAlexey Samsonov 18ba869e79SAlexey Samsonov return 0; 19ba869e79SAlexey Samsonov } 20