Disable some bogus -Wmaybe-uninitialized warnings

Disable some bogus -Wmaybe-uninitialized warnings

gcc/ChangeLog:
	PR middle-end/97840
	* ipa-modref.c (analyze_ssa_name_flags): Skip clobbers if inlining
	is done.
	* tree-ssa-uninit.c (maybe_warn_pass_by_reference): Make stmt gcall;
	skip const calls and unused arguments.
	(warn_uninitialized_vars): Update prototype.

gcc/testsuite/ChangeLog:
	* g++.dg/warn/uninit-1.C: New test.