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.

gcc/testsuite/ChangeLog:

2022-03-07  Martin Jambor  <mjambor@suse.cz>

	PR ipa/104813
	* gcc.dg/ipa/pr104813.c: New test.

0 files changed, 0 insertions, 0 deletions