gnu/dist/gcc4/gcc/testsuite/gcc.dg/tree-ssa/pr22230.c

   1 /* { dg-do run } */
   2 /* { dg-options "-O1 -ftree-vrp" } */
   3
   4 /* PR tree-optimization/22230
   5
   6    The meet of the ranges in "i*i" was not computed correctly, leading
   7    gcc to believe that a was equal to 0 after the loop.  */
   8
   9 extern void abort (void) __attribute__((noreturn));
  10
  11 int main (void)
  12 {
  13   long a, i;
  14
  15   for (i = 0; i < 5; i++)
  16     a = i * i;
  17   if (a != 16)
  18     abort ();
  19   return 0;
  20 }
  21