PR middle-end/66314
	PR gcov-profile/66899
	* tree-ssa-threadupdate.c (mark_threaded_blocks): Correctly
	iterate over the jump threading paths when an element in the
	jump threading paths array is eliminated.

	PR middle-end/66314
	PR gcov-profile/66899
	* gcc.dg/pr66899.c: New test.
	* gcc.dg/pr66314.c: New test.

From-SVN: r226516