gcc/testsuite/gcc.dg/tree-ssa/structopt-2.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fdump-tree-optimized -fno-tree-sra" } */
   3
   4 /* Even without SRA being enabled, we should be able to eliminate every structure store and load here. */
   5 extern void foo (const int);
   6 int main(void)
   7 {
   8         struct a
   9         {
  10                 int e;
  11                 int f;
  12                 int g;
  13         }  a;
  14         struct a b;
  15         int x, c;
  16         a.e = 50;
  17         a.f = 9;
  18         a.g = a.e * a.f;
  19         foo (a.f);
  20         foo (a.g);
  21         x = a.f;
  22         c = a.e;
  23         foo (x);
  24         foo (c);
  25         a.e = 5;
  26         a.f = 40;
  27         a.g = 90;
  28         foo (a.e);
  29         foo (a.f);
  30         foo (a.g);
  31         c = a.f;
  32         foo (c);
  33         b.e = 9;
  34         a.e = b.e + 1 * c;
  35         a.f = 30;
  36         foo (a.e);
  37         foo (a.f);
  38         x = a.e * a.f;
  39         foo (x);
  40
  41 }
  42 /* { dg-final { scan-tree-dump-times "a.e" 0 "optimized" } } */
  43 /* { dg-final { scan-tree-dump-times "a.f" 0 "optimized" } } */
  44 /* { dg-final { scan-tree-dump-times "a.g" 0 "optimized" } } */
  45 /* { dg-final { scan-tree-dump-times "b.e" 0 "optimized" } } */