gcc/testsuite/gcc.dg/overflow-1.c

   1 /* PR optimization/13318 */
   2 /* Origin: <bremner@unb.ca> */
   3 /* Reduced testcase: Wolfgang Bangerth <bangerth@dealii.org> */
   4
   5 /* Verify that the big multiplier doesn't cause an integer
   6    overflow in the loop optimizer.  */
   7
   8 /* { dg-do compile } */
   9 /* { dg-options "-O2" } */
  10
  11 struct S {
  12   int key;
  13   int rnext,rprev;
  14 };
  15
  16 void foo(struct S* H)
  17 {
  18   int i, k;
  19   for (i=0; i<2; i++){
  20     struct S* cell=H+k;
  21     cell->key=i*(0xffffffffUL/2);
  22     cell->rnext=k+(1-i);
  23     cell->rprev=k+(1-i);
  24   }
  25 }