* alpha.c (alpha_emit_set_const_1): Also try c + small constant.

From-SVN: r32304

gcc/ChangeLog

+2000-03-02  Richard Henderson  <rth@cygnus.com>
+
+	* alpha.c (alpha_emit_set_const_1): Also try c + small constant.
+
 2000-03-02  Mark Mitchell  <mark@codesourcery.com>
 
 	* tree.h (TYPE_ALIGN_UNIT): New macro.

gcc/config/alpha/alpha.c

@@ -1400,6 +1400,14 @@ alpha_emit_set_const_1 (target, mode, c, n)
 				 target, 0, OPTAB_WIDEN);
     }
 
+  /* Next, see if, minus some low bits, we've an easy load of high bits.  */
+
+  new = ((c & 0xffff) ^ 0x8000) - 0x8000;
+  if (new != 0
+      && (temp = alpha_emit_set_const (subtarget, mode, c - new, n - 1)) != 0)
+    return expand_binop (mode, add_optab, temp, GEN_INT (new),
+			 target, 0, OPTAB_WIDEN);
+
   return 0;
 }