mn10300: Re-write move patterns.

Use the "D" and "A" constraints, and the enabled attribute to
unify all ofthe integer move patterns.  Delete the fake double
word move patterns; let the middle-end generate subregs as required.

Unfortunately, this somehow exposes a register pressure problem
with the udivmod pattern.  This is properly fixed with subsequent
patches that expose the MDR register.

In the meantime it is highly desirable to to preserve bisect-ability
of the patch series, so disable this pattern for AM30.

From-SVN: r169004

gcc/ChangeLog

+2011-01-19  Richard Henderson  <rth@redhat.com>
+
+	* config/mn10300/mn10300.md (*am33_movqi, *mn10300_movqi): Merge into
+	(*movqi_internal): ... here.
+	(*am33_movhi, *mn10300_movhi): Merge into...
+	(*movhi_internal): ... here.
+	(*movsi_internal): Use "r" instead of "dax" in constraints.  Use "A"
+	as the source/destination of moves from/to SP.
+	(movsf): Only allow for AM33-2.
+	(*movsf_internal): Use "r" instead of "dax"; use "F" instead of 
+	any integer constant constraint.  Only allow for AM33-2.  Tidy
+	all of the alternative outputs.
+	(movdi, movdf, *am33_2_movdf, *mn10300_movdf): Remove.
+	(udivmodsi4): Delete expander and promote *udivmodsi4.  Disallow
+	for MN103.
+	(udivsi3, umodsi3): New patterns for MN103 only.
+
 2011-01-19  Joern Rennecke  <amylaar@spamcop.net>
 
 	* doc/tm.texi.in: Spell out that a lack of register class unions