diff options
Diffstat (limited to 'gcc/tree-vrp.c')
| -rw-r--r-- | gcc/tree-vrp.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/gcc/tree-vrp.c b/gcc/tree-vrp.c index de7a931..7d7e0c9 100644 --- a/gcc/tree-vrp.c +++ b/gcc/tree-vrp.c @@ -3454,11 +3454,15 @@ vrp_meet (value_range_t *vr0, value_range_t *vr1) no_meet: /* The two range VR0 and VR1 do not meet. Before giving up and setting the result to VARYING, see if we can at least derive a - useful anti-range. */ + useful anti-range. FIXME, all this nonsense about distinguishing + anti-ranges from ranges is necessary because of the odd + semantics of range_includes_zero_p and friends. */ if (!symbolic_range_p (vr0) - && !range_includes_zero_p (vr0) + && ((vr0->type == VR_RANGE && !range_includes_zero_p (vr0)) + || (vr0->type == VR_ANTI_RANGE && range_includes_zero_p (vr0))) && !symbolic_range_p (vr1) - && !range_includes_zero_p (vr1)) + && ((vr1->type == VR_RANGE && !range_includes_zero_p (vr1)) + || (vr1->type == VR_ANTI_RANGE && range_includes_zero_p (vr1)))) { set_value_range_to_nonnull (vr0, TREE_TYPE (vr0->min)); |