1 /* { dg-do compile } */
2 /* { dg-options "-O2 -fno-tree-fre -fdisable-tree-evrp -fdump-tree-vrp1-details -fdelete-null-pointer-checks" } */
3
4 int
foo(int i,int * p)5 foo (int i, int *p)
6 {
7 int j;
8
9 if (i > 10)
10 {
11 if (p)
12 {
13 j = *p;
14 /* This should be folded to if (1) because of the parent 'if
15 (p)'. But the dereference of p above does not need an
16 assertion. */
17 if (p)
18 return j + 1;
19 }
20 }
21 else
22 {
23 j = *p - 3;
24 /* This should be folded to if (0), because p has just been
25 dereferenced. But we were not inserting enough ASSERT_EXPRs
26 to figure it out. */
27 if (!p)
28 return j - 4;
29 }
30
31 return i;
32 }
33 /* Target disabling -fdelete-null-pointer-checks should not fold checks */
34 /* { dg-final { scan-tree-dump-times "Folding predicate p_.*to 1" 1 "vrp1" } } */
35 /* { dg-final { scan-tree-dump-times "Folding predicate p_.*to 0" 1 "vrp1" { target { ! keeps_null_pointer_checks } } } } */
36 /* { dg-final { scan-tree-dump-times "Folding predicate p_.*to 0" 0 "vrp1" { target { keeps_null_pointer_checks } } } } */
37
38 /* { dg-final { scan-tree-dump-times "PREDICATE: p_\[0-9\]" 2 "vrp1" { target { ! keeps_null_pointer_checks } } } } */
39 /* { dg-final { scan-tree-dump-times "PREDICATE: p_\[0-9\]" 1 "vrp1" { target { keeps_null_pointer_checks } } } } */
40