gcc/testsuite/c-c++-common/ubsan/overflow-int128.c

   1 /* { dg-do run } */
   2 /* { dg-require-effective-target int128 } */
   3 /* { dg-options "-fsanitize=signed-integer-overflow" } */
   4
   5 /* 2^127 - 1 */
   6 #define INT128_MAX (__int128) (((unsigned __int128) 1 << ((__SIZEOF_INT128__ * __CHAR_BIT__) - 1)) - 1)
   7 #define INT128_MIN (-INT128_MAX - 1)
   8
   9 int
  10 main (void)
  11 {
  12   volatile __int128 i = INT128_MAX;
  13   volatile __int128 j = 1;
  14   volatile __int128 k = i + j;
  15   k = j + i;
  16   i++;
  17   j = INT128_MAX - 100;
  18   j += (1 << 10);
  19
  20   j = INT128_MIN;
  21   i = -1;
  22   k = i + j;
  23   k = j + i;
  24   j--;
  25   j = INT128_MIN + 100;
  26   j += -(1 << 10);
  27
  28   i = INT128_MAX;
  29   j = 2;
  30   k = i * j;
  31
  32   i = INT128_MIN;
  33   i = -i;
  34
  35   return 0;
  36 }
  37
  38 /* { dg-output "signed integer overflow: 0x7fffffffffffffffffffffffffffffff \\+ 1 cannot be represented in type '__int128'(\n|\r\n|\r)" } */
  39 /* { dg-output "\[^\n\r]*signed integer overflow: 1 \\+ 0x7fffffffffffffffffffffffffffffff cannot be represented in type '__int128'(\n|\r\n|\r)" } */
  40 /* { dg-output "\[^\n\r]*signed integer overflow: 0x7fffffffffffffffffffffffffffffff \\+ 1 cannot be represented in type '__int128'(\n|\r\n|\r)" } */
  41 /* { dg-output "\[^\n\r]*signed integer overflow: 0x7fffffffffffffffffffffffffffff9b \\+ 1024 cannot be represented in type '__int128'(\n|\r\n|\r)" } */
  42 /* { dg-output "\[^\n\r]*signed integer overflow: -1 \\+ 0x80000000000000000000000000000000 cannot be represented in type '__int128'(\n|\r\n|\r)" } */
  43 /* { dg-output "\[^\n\r]*signed integer overflow: 0x80000000000000000000000000000000 \\+ -1 cannot be represented in type '__int128'(\n|\r\n|\r)" } */
  44 /* { dg-output "\[^\n\r]*signed integer overflow: 0x80000000000000000000000000000000 \\+ -1 cannot be represented in type '__int128'(\n|\r\n|\r)" } */
  45 /* { dg-output "\[^\n\r]*signed integer overflow: 0x80000000000000000000000000000064 \\+ -1024 cannot be represented in type '__int128'(\n|\r\n|\r)" } */
  46 /* { dg-output "\[^\n\r]*signed integer overflow: 0x7fffffffffffffffffffffffffffffff \\* 2 cannot be represented in type '__int128'(\n|\r\n|\r)" } */
  47 /* { dg-output "\[^\n\r]*negation of 0x80000000000000000000000000000000 cannot be represented in type '__int128'; cast to an unsigned type to negate this value to itself\[^\n\r]*(\n|\r\n|\r)" } */