combine.c (record_truncated_value): Turn from being a for_each_rtx callback to a function that takes an rtx and...

gcc/
	* combine.c (record_truncated_value): Turn from being a for_each_rtx
	callback to a function that takes an rtx and returns a bool
	(record_truncated_values): Use FOR_EACH_SUBRTX_VAR instead of
	for_each_rtx.

From-SVN: r214624