mul-overflow.cpp
507 Bytes
// RUN: %clangxx -fsanitize=signed-integer-overflow %s -o %t && %run %t 2>&1 | FileCheck %s
#include <stdint.h>
int main() {
// These promote to 'int'.
(void)(int8_t(-2) * int8_t(0x7f));
(void)(int16_t(0x7fff) * int16_t(0x7fff));
(void)(uint16_t(0xffff) * int16_t(0x7fff));
(void)(uint16_t(0xffff) * uint16_t(0x8000));
// CHECK: mul-overflow.cpp:13:27: runtime error: signed integer overflow: 65535 * 32769 cannot be represented in type 'int'
(void)(uint16_t(0xffff) * uint16_t(0x8001));
}