gcc/testsuite/gcc.c-torture/execute/20020423-1.c

   1 /* PR c/5430 */
   2 /* Verify that the multiplicative folding code is not fooled
   3    by the mix between signed variables and unsigned constants. */
   4
   5 extern void abort (void);
   6 extern void exit (int);
   7
   8 int main (void)
   9 {
  10   int my_int = 924;
  11   unsigned int result;
  12
  13   result = ((my_int*2 + 4) - 8U) / 2;
  14   if (result != 922U)
  15     abort();
  16
  17   result = ((my_int*2 - 4U) + 2) / 2;
  18   if (result != 923U)
  19     abort();
  20
  21   result = (((my_int + 2) * 2) - 8U - 4) / 2;
  22   if (result != 920U)
  23     abort();
  24   result = (((my_int + 2) * 2) - (8U + 4)) / 2;
  25   if (result != 920U)
  26     abort();
  27
  28   result = ((my_int*4 + 2U) - 4U) / 2;
  29   if (result != 1847U)
  30     abort();
  31
  32   exit(0);
  33 }