PR tree-optimization/51117
	* tree-eh.c (sink_clobbers): New function.
	(execute_lower_eh_dispatch): Call it for BBs ending with
	internally throwing RESX.
	* cfgexpand.c (add_scope_conflicts_1): Add all conflicts only
	at the first real instruction.

Co-Authored-By: Michael Matz <matz@suse.de>

From-SVN: r182283