Viewing file:  vrp07.c (1.04 KB) -rw-r--r--
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/* { dg-do compile } */
/* { dg-options "-O2 -fno-tree-fre -fdisable-tree-evrp -fdump-tree-vrp1-details -fdelete-null-pointer-checks -fno-thread-jumps" } */
int
foo (int i, int *p)
{
int j;
if (i > 10)
{
if (p)
{
j = *p;
/* This should be folded to if (1) because of the parent 'if
(p)'. But the dereference of p above does not need an
assertion. */
if (p)
return j + 1;
}
}
else
{
j = *p - 3;
/* This should be folded to if (0), because p has just been
dereferenced. But we were not inserting enough ASSERT_EXPRs
to figure it out. */
if (!p)
return j - 4;
}
return i;
}
/* Target disabling -fdelete-null-pointer-checks should not fold checks */
/* { dg-final { scan-tree-dump-times "Folding predicate p_.*to 1" 1 "vrp1" } } */
/* { dg-final { scan-tree-dump-times "Folding predicate p_.*to 0" 1 "vrp1" { target { ! keeps_null_pointer_checks } } } } */
/* { dg-final { scan-tree-dump-times "Folding predicate p_.*to 0" 0 "vrp1" { target { keeps_null_pointer_checks } } } } */
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