gcc/testsuite/gcc.dg/pr48335-8.c

   1 /* PR middle-end/48335 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-O2 -fno-tree-sra" } */
   4
   5 typedef short U __attribute__((may_alias, aligned (1)));
   6
   7 struct S
   8 {
   9   double d;
  10 };
  11
  12 int
  13 f1 (struct S x)
  14 {
  15   struct S s = x;
  16   return ((U *)((char *) &s.d + 1))[-1];
  17 }
  18
  19 int
  20 f2 (struct S x)
  21 {
  22   struct S s = x;
  23   return ((U *)((char *) &s.d + 1))[-2];
  24 }
  25
  26 int
  27 f3 (struct S x)
  28 {
  29   struct S s = x;
  30   return ((U *)((char *) &s.d + 1))[5];
  31 }