re PR other/59545 (Signed integer overflow issues)

re PR other/59545 (Signed integer overflow issues)

	PR other/59545
	* genattrtab.c (struct attr_hash): Change hashcode type to unsigned.
	(attr_hash_add_rtx, attr_hash_add_string): Change hashcode parameter
	to unsigned.
	(attr_rtx_1): Change hashcode variable to unsigned.
	(attr_string): Likewise.  Perform first multiplication in unsigned
	type.
	* ifcvt.c (noce_try_store_flag_constants): Avoid signed integer
	overflows.
	* double-int.c (neg_double): Likewise.
	* stor-layout.c (set_min_and_max_values_for_integral_type): Likewise.
	* combine.c (force_to_mode): Likewise.
	* postreload.c (move2add_use_add2_insn, move2add_use_add3_insn,
	reload_cse_move2add, move2add_note_store): Likewise.
	* simplify-rtx.c (simplify_const_unary_operation,
	simplify_const_binary_operation): Likewise.
	* ipa-split.c (find_split_points): Initialize first.can_split
	and first.non_ssa_vars.
	* gengtype-state.c (read_state_files_list): Fix up check.
	* genautomata.c (reserv_sets_hash_value): Use portable rotation
	idiom.
java/
	* class.c (hashUtf8String): Compute hash in unsigned type.
	* javaop.h (WORD_TO_INT): Avoid signed integer overflow.

From-SVN: r206134