89b0276d3f
It's cleaner to have the unsupported_range fully fleshed out, instead of trapping on every operation. It can also serve as the basis for the default vrange methods that frange and prange will inherit. This patch implements most methods, including union and intersect, to handle an UNDEFINED and a VARYING range. Since this can serve as the basis for other classes, I have moved everything into the vrange class, making the unsupported_range trivial. Note that vrange is still an abstract class, as I have purposely left the dump() method abstract. Also, I have made the unsupported range in the temporary class (Value_Range) a method field, instead of a static member. This way the temporary can set UNDEFINED and VARYING as needed. Tested on x86-64 Linux. gcc/ChangeLog: * value-range.cc (vrange::contains_p): Implement. (vrange::type): Return void. (vrange::supports_type_p): Implement. (irange::fits_p): Same. (vrange::set_undefined): Same. (irange::set_nonnegative): Same. (vrange::set_varying): Same. (vrange::union_): Same. (unsupported_range::set): Move to vrange. (unsupported_range::type): Move to vrange. (vrange::intersect): Implement for varying and undefined. (vrange::zero_p): Implement. (unsupported_range::supports_type_p): Move to vrange. (vrange::nonzero_p): Implement. (unsupported_range::set_undefined): Move to vrange. (unsupported_range::set_varying): Same. (unsupported_range::dump): Same. (unsupported_range::union_): Same. Implement for varying and undefined. (unsupported_range::intersect): Move to vrange. (unsupported_range::zero_p): Same. (unsupported_range::nonzero_p): Same. (unsupported_range::set_nonzero): Same. (unsupported_range::set_zero): Same. (unsupported_range::set_nonnegative): Same. (unsupported_range::fits_p): Same. * value-range.h (class vrange): Remove abstract markers for most methods. (class unsupported_range): Remove most methods as they will now be inherited from vrange. |
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