re PR debug/47283 (ICE in refs_may_alias_p_1, at tree-ssa-alias.c)

re PR debug/47283 (ICE in refs_may_alias_p_1, at tree-ssa-alias.c)

	PR debug/47283
	* cfgexpand.c (convert_debug_memory_address): Add AS parameter.
	Use target address_mode and pointer_mode hooks instead of hardcoded
	Pmode and ptr_mode.  Handle some simple cases of extending if
	POINTERS_EXTEND_UNSIGNED < 0.
	(expand_debug_expr) <case MEM_REF, INDIRECT_REF, TARGET_MEM_REF>:
	Call convert_debug_memory_address.
	(expand_debug_expr) <case ADDR_EXPR>: Pass as to
	convert_debug_memory_address.

From-SVN: r170566