compiler-rt/test/ubsan/TestCases/Integer/mul-overflow.cpp

   1 // RUN: %clangxx -fsanitize=signed-integer-overflow %s -o %t && %run %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   // CHECK: mul-overflow.cpp:13:27: runtime error: signed integer overflow: 65535 * 32769 cannot be represented in type 'int'
  13   (void)(uint16_t(0xffff) * uint16_t(0x8001));
  14 }