msp430.md (zero_extendhipsi2): Use MOVX.A to store a 16-bit value into a 20-bit memory slot.

	* config/msp430/msp430.md (zero_extendhipsi2): Use MOVX.A to store
	a 16-bit value into a 20-bit memory slot.

From-SVN: r225240

gcc/ChangeLog

+2015-07-01  Nick Clifton  <nickc@redhat.com>
+
+	* config/msp430/msp430.md (zero_extendhipsi2): Use MOVX.A to store
+	a 16-bit value into a 20-bit memory slot.
+
 2015-07-01  Jiong Wang  <jiong.wang@arm.com>
 
 	* doc/sourcebuild.texi (AArch64-specific attributes): Document

gcc/config/msp430/msp430.md

@@ -572,7 +572,9 @@
   [(set (match_operand:PSI                 0 "msp_nonimmediate_operand" "=r,m")
 	(zero_extend:PSI (match_operand:HI 1 "msp_nonimmediate_operand" "rm,r")))]
   ""
-  "MOVX\t%1, %0"
+  "@
+  MOVX\t%1, %0
+  MOVX.A\t%1, %0"
 )
 
 (define_insn "truncpsihi2"