ipa-cp: Avoid adjusting references through self-recursion (PR 104813)
When writing the patch that downgrades address-taken references to
load references when IPA-CP can prove that all uses of the taken
address ends up in loads, I unfortunately did not take into account
that find_more_scalar_values_for_callers_subset now happily adds
self-recursive edges to the set of callers which should be immediately
redirected (originally recursion was meant to be handled as edge
redirection in a second pass over the SCC).
The code as it is can now decrement the referece counters too many
times. This can remedied by removing self-recursive edges earlier, we
already do it because of thunk expansion issues, and so this patch
does exactly that.
gcc/ChangeLog:
2022-03-07 Martin Jambor <mjambor@suse.cz>
PR ipa/104813
* ipa-cp.cc (create_specialized_node): Move removal of
self-recursive calls from callers vector before refrence
adjustments.
git://gcc.gnu.org / gcc.git / commit