builtins.c (get_builtin_sync_mode): Make unlimited mode_for_size request.

	* builtins.c (get_builtin_sync_mode): Make unlimited
	mode_for_size request.

From-SVN: r105469

gcc/ChangeLog

+2005-10-16  Hans-Peter Nilsson  <hp@axis.com>
+
+	* builtins.c (get_builtin_sync_mode): Make unlimited
+	mode_for_size request.
+
 2005-10-15  Richard Henderson  <rth@redhat.com>
 
 	* gimplify.c (gimplify_var_or_parm_decl): Split out from ...

gcc/builtins.c

@@ -5399,7 +5399,9 @@ expand_builtin_fork_or_exec (tree fn, tree arglist, rtx target, int ignore)
 static inline enum machine_mode
 get_builtin_sync_mode (int fcode_diff)
 {
-  return mode_for_size (BITS_PER_UNIT << fcode_diff, MODE_INT, 1);
+  /* The size is not negotiable, so ask not to get BLKmode in return
+     if the target indicates that a smaller size would be better.  */
+  return mode_for_size (BITS_PER_UNIT << fcode_diff, MODE_INT, 0);
 }
 
 /* Expand the __sync_xxx_and_fetch and __sync_fetch_and_xxx intrinsics.