https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69595
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2016-02-01
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot
gnu.org
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
So VRP doesn't detect the block is unreachable:
_6 = sysnum_4(D) < 0;
Found new range for _6: [0, +INF]
interesting_ssa_edges: adding SSA use in _8 = _6 | _7;
marking stmt to be not simulated again
Visiting statement:
_7 = sysnum_4(D) >= 0;
Found new range for _7: [0, +INF]
marking stmt to be not simulated again
Visiting statement:
_8 = _6 | _7;
Applying pattern match.pd:796, gimple-match.c:164
Found new range for _8: [0, +INF]
interesting_ssa_edges: adding SSA use in if (_8 != 0)
the old issue having to decide between using an integer range or a symbolic
range for a non-assert range we derive (as equivalences are keyed to specific
SSA names and we only have one here, _6).
