re PR rtl-optimization/11974 (ICE building alpha glibc: in emit_move_insn, at expr.c:3206)

PR optimization/11974
* optabs.c (expand_unop): Promote libcall outmode according to
hard_libcall_value.

From-SVN: r72170

gcc/ChangeLog

+2003-10-06  Falk Hueffner  <falk.hueffner@student.uni-tuebingen.de>
+
+        PR optimization/11974
+        * optabs.c (expand_unop): Promote libcall outmode according to
+        hard_libcall_value.
+
 2003-10-06  Zack Weinberg  <zack@codesourcery.com>
 
 	* real.h (REAL_MODE_FORMAT): New macro.

gcc/optabs.c

@@ -2639,7 +2639,8 @@ expand_unop (enum machine_mode mode, optab unoptab, rtx op0, rtx target,
 	 have them return something that isn't a double-word.  */
       if (unoptab == ffs_optab || unoptab == clz_optab || unoptab == ctz_optab
 	  || unoptab == popcount_optab || unoptab == parity_optab)
-	outmode = TYPE_MODE (integer_type_node);
+	outmode
+	    = GET_MODE (hard_libcall_value (TYPE_MODE (integer_type_node)));
 
       start_sequence ();