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PR 122856 shows that when looking at self recursive calls with self-feeding jump functions, we did consider pass-through functions but not ancestor functions with zero offsets. This then leads to the fact that constants which were collected from IPA-CP lattices were not among those collected from available edges, triggering a verification assert. This patch fixes that by also detecting self-feeding ancestor jump functions. gcc/ChangeLog: 2026-02-06 Martin Jambor <mjambor@suse.cz> PR ipa/122856 * ipa-cp.cc (self_recursive_pass_through_p): Test jump function type first. (self_recursive_ancestor_p): New function. (find_scalar_values_for_callers_subset): Test also for self-recursive ancestor jump functions. (push_agg_values_for_index_from_edge): Likewise. gcc/testsuite/ChangeLog: 2026-02-06 Martin Jambor <mjambor@suse.cz> PR ipa/122856 * g++.dg/ipa/pr122856.C: New test.
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