re PR tree-optimization/50908 (building emacs-23.3; gives msg: indent.c:1140:1: internal compiler error: in verify_dominators, at dominance.c:1041)

2011-11-01  Tom de Vries  <tom@codesourcery.com>

	PR tree-optimization/50908
	* tree-ssa-tail-merge.c (update_vuses): Now that edges are removed
	before update_vuses, test for 1 predecessor rather than two.
	(delete_block_update_dominator_info): New function, part of it factored
	out of ...
	(replace_block_by): Use delete_block_update_dominator_info.  Call
	update_vuses after deleting bb1 and updating dominator info, instead of
	before.

From-SVN: r180737