gcc/testsuite/gcc.dg/tree-ssa/pr45144.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fdump-tree-optimized" } */
   3
   4 void baz (unsigned);
   5
   6 extern unsigned buf[];
   7
   8 struct A
   9 {
  10   unsigned a1:10;
  11   unsigned a2:3;
  12   unsigned:19;
  13 };
  14
  15 union TMP
  16 {
  17   struct A a;
  18   unsigned int b;
  19 };
  20
  21 static unsigned
  22 foo (struct A *p)
  23 {
  24   union TMP t;
  25   struct A x;
  26
  27   x = *p;
  28   t.a = x;
  29   return t.b;
  30 }
  31
  32 void
  33 bar (unsigned orig, unsigned *new)
  34 {
  35   struct A a;
  36   union TMP s;
  37
  38   s.b = orig;
  39   a = s.a;
  40   if (a.a1)
  41     baz (a.a2);
  42   *new = foo (&a);
  43 }
  44
  45 /* { dg-final { scan-tree-dump "x = a;" "optimized"} } */
  46 /* { dg-final { cleanup-tree-dump "optimized" } } */