96eb7d7a64
This patch makes value_range_base::set convert POLY_INT_CST bounds into the worst-case INTEGER_CST bounds. The main case in which this gives useful ranges is a lower bound of A + B * X becoming A when B >= 0. E.g.: [32 + 16X, 100] -> [32, 100] [32 + 16X, 32 + 16X] -> [32, MAX] But the same thing can be useful for the upper bound with negative X coefficients. 2019-10-16 Richard Sandiford <richard.sandiford@arm.com> gcc/ PR middle-end/92033 * poly-int.h (constant_lower_bound_with_limit): New function. (constant_upper_bound_with_limit): Likewise. * doc/poly-int.texi: Document them. * tree-vrp.c (value_range_base::set): Convert POLY_INT_CST bounds into the worst-case INTEGER_CST bounds. From-SVN: r277056 |
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| config | ||
| contrib | ||
| fixincludes | ||
| gcc | ||
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| libgfortran | ||
| libgo | ||
| libgomp | ||
| libhsail-rt | ||
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