gcc/testsuite/gcc.dg/store_merging_21.c

   1 /* { dg-do compile } */
   2 /* { dg-require-effective-target store_merge } */
   3 /* { dg-options "-O2 -fdump-tree-store-merging" } */
   4
   5 extern void abort (void);
   6
   7 struct S1 {
   8   unsigned int flag : 1;
   9   unsigned int size : 31;
  10 };
  11
  12 void foo1 (struct S1 *s, struct S1 *m)
  13 {
  14   s->flag = 1;
  15   s->size = m->size;
  16 }
  17
  18 void bar1 (struct S1 *s, struct S1 *m, _Bool flag)
  19 {
  20   s->flag = flag;
  21   s->size = m->size;
  22 }
  23
  24 struct S2 {
  25   unsigned int size : 31;
  26   unsigned int flag : 1;
  27 };
  28
  29 void foo2 (struct S2 *s, struct S2 *m)
  30 {
  31   s->size = m->size;
  32   s->flag = 1;
  33 }
  34
  35 void bar2 (struct S2 *s, struct S2 *m, _Bool flag)
  36 {
  37   s->flag = flag;
  38   s->size = m->size;
  39 }
  40
  41 /* { dg-final { scan-tree-dump-times "Merging successful" 4 "store-merging" } } */