PR tree-optimization/20139

	* tree-cfg.c (remove_bb): Check in_ssa_p before calling
	release_defs.
	* tree-optimize.c (execute_cleanup_cfg_post_optimizing): Call
	fold_cond_expr_cond.
	* tree-ssanames.c (release_defs): Assert in_ssa_p.
	* tree.c (upper_bound_in_type, lower_bound_in_type): Rewrite.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@101787 138bc75d-0d04-0410-961f-82ee72b054a4