* haifa-sched.c (restore_bb_notes): Clear bb field of the notes
	emited outside of basic block.
	* cfgbuild.c (find_bb_boundaries): Clear bb field for insns between
	the created blocks.
	* rtl.h (delete_insn_chain): Declaration changed.
	* cfgrtl.c (delete_insn_chain): Add option to clear bb field for
	non-removed insns.
	(rtl_delete_block, rtl_merge_blocks): Pass true to delete_insn_chain.
	(delete_insn_chain_and_edges, try_redirect_by_replacing_jump,
	rtl_tidy_fallthru_edge, cfg_layout_merge_blocks): Pass false 
	to delete_insn_chain.
	(rtl_verify_flow_info_1): Verify that the insns in header and footer
	do not have bb field set.
	(rtl_verify_flow_info): Verify that insns between basic blocks do not
	have bb field set.
	* recog.c (peephole2_optimize): Add argument to delete_insn_chain call.
	* cfgcleanup.c (try_optimize_cfg): Ditto.

From-SVN: r125492