regclass.c (scan_one_insn): Notice subregs that change the size of their operand.

�
        * regclass.c (scan_one_insn): Notice subregs that change the
        size of their operand.
        (record_reg_classes): Use that to obey CLASS_CANNOT_CHANGE_SIZE.

[[Split portion of a mixed commit.]]

From-SVN: r28094.2

gcc/ChangeLog

+Wed Jul 14 01:57:39 1999  Richard Henderson  <rth@cygnus.com>
+
+	* regclass.c (scan_one_insn): Notice subregs that change the
+	size of their operand.
+	(record_reg_classes): Use that to obey CLASS_CANNOT_CHANGE_SIZE.
+
 Wed Jul 14 01:41:42 1999  Jeffrey A Law  (law@cygnus.com)
 
 	* configure.in (alpha*-*-*): Include alpha/t-ieee.