i386.md (movqi recognizer): Don't perfom byte increment into a NON_QI_REG_P.

        * i386.md (movqi recognizer): Don't perfom byte increment into
        a NON_QI_REG_P.

From-SVN: r19050

gcc/ChangeLog

@@ -13,9 +13,12 @@ Fri Apr  3 17:02:13 1998  Alexandre Petit-Bianco  <apbianco@cygnus.com>
 
 Wed Apr  8 12:51:19 1998  Jeffrey A Law  (law@cygnus.com)
 
+	* i386.md (movqi recognizer): Don't perfom byte increment into
+	a NON_QI_REG_P.
+
 	* configure.in (x86-dg-dgux): Run fixinc.dgux.
 
-	* i386.h: Fix typo in GEN_INT changes.
+	* i370.h: Fix typo in GEN_INT changes.
 
 	* bitmap.c (bitmap_element_allocate): Use "void" for arglist instead
 	of an empty arglist in prototype.

gcc/config/i386/i386.md

@@ -1105,6 +1105,7 @@
     return AS2 (xor%L0,%k0,%k0);
 
   if (operands[1] == const1_rtx
+      && !NON_QI_REG_P (operands[0])
       && (link = find_reg_note (insn, REG_WAS_0, 0))
       /* Make sure the insn that stored the 0 is still present.  */
       && ! INSN_DELETED_P (XEXP (link, 0))