gcc/testsuite/gcc.dg/tree-ssa/sra-14.c

   1 /* { dg-do run } */
   2 /* { dg-options "-O1" } */
   3
   4 struct S
   5 {
   6   int i, j;
   7 };
   8
   9 struct Z
  10 {
  11   struct S d, s;
  12 };
  13
  14 struct S __attribute__ ((noinline, noclone))
  15 get_s (void)
  16 {
  17   struct S s;
  18   s.i = 5;
  19   s.j = 6;
  20
  21   return s;
  22 }
  23
  24 struct S __attribute__ ((noinline, noclone))
  25 get_d (void)
  26 {
  27   struct S d;
  28   d.i = 0;
  29   d.j = 0;
  30
  31   return d;
  32 }
  33
  34 int __attribute__ ((noinline, noclone))
  35 get_c (void)
  36 {
  37   return 1;
  38 }
  39
  40 int __attribute__ ((noinline, noclone))
  41 my_nop (int i)
  42 {
  43   return i;
  44 }
  45
  46 int __attribute__ ((noinline, noclone))
  47 foo (void)
  48 {
  49   struct Z z;
  50   int i, c = get_c ();
  51
  52   z.d = get_d ();
  53   z.s = get_s ();
  54
  55   for (i = 0; i < c; i++)
  56     {
  57       z.s.i = my_nop (z.s.i);
  58       z.s.j = my_nop (z.s.j);
  59     }
  60
  61   return z.s.i + z.s.j;
  62 }
  63
  64 int main (int argc, char *argv[])
  65 {
  66   if (foo () != 11)
  67     __builtin_abort ();
  68   return 0;
  69 }
  70