75f59441cd
Previously [5,6] U NAN would just drop to VARYING. With this patch, the resulting range becomes [5,6] with the NAN bit set to unknown. [I still have yet to decide what to do with intersections. ISTM, the intersection of a known NAN with anything else should be a NAN, but it could also be undefined (the empty set). I'll have to run some tests and see. Currently, we drop to VARYING cause well... it's always safe to give up;-).] gcc/ChangeLog: * value-range.cc (early_nan_resolve): Change comment. (frange::union_): Handle union when one side is a NAN. (range_tests_nan): Add tests for NAN union. |
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| c++tools | ||
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