ipa-sra: Disable candidates with no known callers (PR 110276)
In IPA-SRA we use can_be_local_p () predicate rather than just plain
local call graph flag in order to figure out whether the node is a
part of an external API that we cannot change. Although there are
cases where this can allow more transformations, it also means we can
analyze functions which have no callers at all, which is pointless.
Moreover, it makes an assert of hint propagation trigger, which checks
that we have looked at callers before processing hints that come from
them. This has been reported as PR 110276.
This patch simply adds a check that a node has at least one caller
into the early checks and makes the node a non-candidate for any
transformation if it does not.
gcc/ChangeLog:
2023-06-16 Martin Jambor <mjambor@suse.cz>
PR ipa/110276
* ipa-sra.cc (struct caller_issues): New field there_is_one.
(check_for_caller_issues): Set it.
(check_all_callers_for_issues): Check it.
git://gcc.gnu.org / gcc.git / commit