[thirdparty/gcc.git] / gcc / testsuite / gcc.dg / tree-ssa / ssa-ccp-21.c

/* { dg-do compile } */
/* { dg-options "-O -fdump-tree-ccp1" } */

struct A {
    struct B {
	int i;
    } b;
} a;

int foo (void)
{
  struct B *p = &a.b;
  struct A *q = (struct A *) p;
  return q->b.i;
}

int bar (void)
{
  struct A *p = &a;
  struct B *q = (struct B *) p;
  return q->i;
}

/* The first access is through struct A, so a.b.i is fine,
   the second access needs to preserve the original access type struct B.  */

/* { dg-final { scan-tree-dump-times "a.b.i" 1 "ccp1" } } */
/* { dg-final { scan-tree-dump-times "MEM\\\[\\\(struct B \\\*\\\)&a\\\].i" 1 "ccp1" } } */
Commit	Line	Data
99f536cc RG	1	/* { dg-do compile } */
	2	/* { dg-options "-O -fdump-tree-ccp1" } */
	3
	4	struct A {
	5	struct B {
	6	int i;
	7	} b;
	8	} a;
	9
	10	int foo (void)
	11	{
	12	struct B *p = &a.b;
	13	struct A q = (struct A ) p;
	14	return q->b.i;
	15	}
	16
	17	int bar (void)
	18	{
	19	struct A *p = &a;
	20	struct B q = (struct B ) p;
	21	return q->i;
	22	}
	23
70f34814 RG	24	/* The first access is through struct A, so a.b.i is fine,
	25	the second access needs to preserve the original access type struct B. */
	26
	27	/* { dg-final { scan-tree-dump-times "a.b.i" 1 "ccp1" } } */
	28	/* { dg-final { scan-tree-dump-times "MEM\\\[\\\(struct B \\\\\\)&a\\\].i" 1 "ccp1" } } /