1/* PR rtl-optimization/20290  */
2
3/* We used to mis-optimize the second loop in main on at least ppc and
4   arm, because tree loop would change the loop to something like:
5
6  ivtmp.65 = &l[i];
7  ivtmp.16 = 113;
8  goto <bb 4> (<L4>);
9
10<L3>:;
11  *(ivtmp.65 + 4294967292B) = 9;
12  i = i + 1;
13
14<L4>:;
15  ivtmp.16 = ivtmp.16 - 1;
16  ivtmp.65 = ivtmp.65 + 4B;
17  if (ivtmp.16 != 0) goto <L3>;
18
19  We used to consider the increment of i as executed in every
20  iteration, so we'd miscompute the final value.  */
21
22extern void abort (void);
23
24void
25check (unsigned int *l)
26{
27  int i;
28  for (i = 0; i < 288; i++)
29    if (l[i] != 7 + (i < 256 || i >= 280) + (i >= 144 && i < 256))
30      abort ();
31}
32
33int
34main (void)
35{
36  int i;
37  unsigned int l[288];
38
39  for (i = 0; i < 144; i++)
40    l[i] = 8;
41  for (; i < 256; i++)
42    l[i] = 9;
43  for (; i < 280; i++)
44    l[i] = 7;
45  for (; i < 288; i++)
46    l[i] = 8;
47  check (l);
48  return 0;
49}
50
51