83325a9db8
My recent match.pd change required quite a lot of code due to the separate need to handle INTEGER_CSTs and SSA_NAMEs, and after all, I didn't even handle one case there, when in x * y / y the x is INTEGER_CST and y is SSA_NAME. The following patch allows to simplify it, by allowing non-SSA_NAME argument to get_range_info, for INTEGER_CSTs it will return VR_RANGE with *min == *max equal to the constnat, and for non-INTEGER_CST/SSA_NAMEs it will just return VR_VARYING. This allows not to simplify just the match.pd, but some other spots too. 2020-11-27 Jakub Jelinek <jakub@redhat.com> * tree-ssanames.c (get_range_info): Handle INTEGER_CST by returning VR_RANGE with both *min and *max set to the wide_int value of the INTEGER_CST. Return VR_VARYING for non-SSA_NAMEs. * match.pd ((t * 2) / 2) -> t): Handle also @0 being INTEGER_CST. Simplify by calling get_range_info on everything. * tree-ssa-strlen.c (maybe_diag_stxncpy_trunc): Simplify by calling get_range_info on everything. * tree-scalar-evolution.c (iv_can_overflow_p): Likewise. |
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