1 // RUN: %clang -fsanitize=unsigned-integer-overflow %s -o %t && %t 2>&1 | FileCheck %s 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)); 16 // CHECK: umul-overflow.cpp:15:31: runtime error: unsigned integer overflow: 4294967295 * 2 cannot be represented in type 'unsigned int' 17 18 return 0; 19 } 20
