1  /* PR tree-optimization/87859 */
       2  /* { dg-do run } */
       3  /* { dg-options "-O2 -fno-tree-vectorize -fdump-tree-store-merging-details" } */
       4  /* { dg-final { scan-tree-dump "New sequence of \[23] stores to replace old one of 14 stores" "store-merging" { target i?86-*-* x86_64-*-* } } } */
       5  /* { dg-final { scan-tree-dump "New sequence of 1 stores to replace old one of 6 stores" "store-merging" { target i?86-*-* x86_64-*-* } } } */
       6  
       7  struct S {
       8    union F {
       9      struct T {
      10  #define A(n) unsigned n:1;
      11  #define B(n) A(n##0) A(n##1) A(n##2) A(n##3) A(n##4) \
      12  	     A(n##5) A(n##6) A(n##7) A(n##8) A(n##9)
      13        B(f) B(f1) B(f2) B(f3) B(f4) B(f5)
      14        A(f60) A(f61) A(f62) A(f63) A(f64) A(f65) A(f66)
      15      } q;
      16      unsigned int i[3];
      17    } f;
      18  };
      19  
      20  struct S s = {
      21    .f.q.f0 = 1, .f.q.f1 = 1, .f.q.f2 = 1, .f.q.f5 = 1, .f.q.f6 = 1,
      22    .f.q.f7 = 1, .f.q.f8 = 1, .f.q.f9 = 1, .f.q.f13 = 1, .f.q.f14 = 1,
      23    .f.q.f15 = 1, .f.q.f16 = 1, .f.q.f17 = 1, .f.q.f19 = 1, .f.q.f21 = 1,
      24    .f.q.f66 = 1
      25  };
      26  
      27  __attribute__((noipa)) void
      28  bar (unsigned *x)
      29  {
      30    if (x[0] != s.f.i[0] || x[1] != s.f.i[1] || x[2] != s.f.i[2])
      31      __builtin_abort ();
      32  }
      33  
      34  __attribute__((noipa)) void
      35  foo (unsigned char *state, unsigned char c)
      36  {
      37    struct S i;
      38    i.f.i[0] = 0;
      39    i.f.i[1] = 0;
      40    i.f.i[2] = 0;
      41    i.f.q.f7 = 1;
      42    i.f.q.f2 = 1;
      43    i.f.q.f21 = 1;
      44    i.f.q.f19 = 1;
      45    i.f.q.f14 = 1;
      46    i.f.q.f5 = 1;
      47    i.f.q.f0 = 1;
      48    i.f.q.f15 = 1;
      49    i.f.q.f16 = 1;
      50    i.f.q.f6 = 1;
      51    i.f.q.f9 = 1;
      52    i.f.q.f17 = c;
      53    i.f.q.f1 = 1;
      54    i.f.q.f8 = 1;
      55    i.f.q.f13 = 1;
      56    i.f.q.f66 = 1;
      57    if (*state)
      58      {
      59        i.f.q.f37 = 1;
      60        i.f.q.f38 = 1;
      61        i.f.q.f39 = 1;
      62        i.f.q.f40 = 1;
      63        i.f.q.f41 = 1;
      64        i.f.q.f36 = 1;
      65      }
      66    bar (i.f.i);
      67  }
      68  
      69  int
      70  main ()
      71  {
      72    unsigned char z = 0;
      73    foo (&z, 1);
      74    return 0;
      75  }