gcse.c (delete_null_pointer_checks_1): Do not use delelete_list; call purge_dead_edges after removing.

	* gcse.c (delete_null_pointer_checks_1): Do not use delelete_list;
	call purge_dead_edges after removing.
	(delete_null_pointer_checks): Do not handle delete_list.

	* cfgbuild.c (inside_basic_block_p, control_flow_insn_p): Break out from ...
	(count_basic_blocks): ... here.
	(find_basic_blocks, find_bb_boundaries): Cleanup.

	* stor-layout.c (fixup_signed_type, fixup_unsigned_type): Avoid
	overflow for types greater then 2 * HOST_WIDE_INT.

	* reload.c (find_reloads): Update the duplicates after swapingg.

From-SVN: r47551