gcc/testsuite/gcc.dg/tree-ssa/struct-aliasing-1.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fdump-tree-fre1-details" } */
   3
   4 struct S { float f; };
   5 int __attribute__((noinline))
   6 foo (float *r, struct S *p)
   7 {
   8   int *q = (int *)&p->f;
   9   int i = *q;
  10   *r = 0.0;
  11   return i + *q;
  12 }
  13
  14 /* { dg-final { scan-tree-dump "Replaced\[^\n\]*with i_." "fre1" } } */