re PR middle-end/29943 (gcc generate incorrect alias symbols for PPC)

	PR target/29943
	* varasm.c (use_blocks_for_decl_p): Return false for decls with
	alias attribute.

From-SVN: r122148

gcc/ChangeLog

+2007-02-20  Alan Modra  <amodra@bigpond.net.au>
+
+	PR target/29943
+	* varasm.c (use_blocks_for_decl_p): Return false for decls with
+	alias attribute.
+
 2007-02-19  Kazu Hirata  <kazu@codesourcery.com>
 
 	* doc/invoke.texi (-ftree-lrs): Remove.

gcc/varasm.c

@@ -1218,6 +1218,10 @@ use_blocks_for_decl_p (tree decl)
   if (DECL_INITIAL (decl) == decl)
     return false;
 
+  /* If this decl is an alias, then we don't want to emit a definition.  */
+  if (lookup_attribute ("alias", DECL_ATTRIBUTES (decl)))
+    return false;
+
   return true;
 }