[Bug c/27007] Missed optimization of comparison with 'limited range'

[trt at acm dot org]

------- Comment #7 from trt at acm dot org  2006-05-04 17:21 -------
For the tree-vrp.c part of this, perhaps VR_VARYING should be deprecated?  I
notice there is a single place (set_value_range_to_varying) which assigns
VR_VARYING but a couple dozen places that check it.  If instead a type-based
VR_RANGE were assigned then all those checks could be omitted.  And I think vrp
would also do a better job.  It looks like this is already being considered:
http://gcc.gnu.org/ml/gcc/2006-03/msg00790.html


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27007