[Ada] Small debug info tweak

[Ada] Small debug info tweak

[Eric Botcazou]

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The purpose of the XVS parallel types is documented in exp_dbug.ads, but turns 
out to be somewhat vague.  It appears that they are not needed if the type 
has a fixed size.  Hence the attached patch.

Tested on i586-suse-linux, applied on the mainline.


2008-04-18  Eric Botcazou  <ebotcazou@adacore.com>

	* decl.c (maybe_pad_type): Only generate the XVS parallel type if
	the padded type has a variable size.


-- 
Eric Botcazou

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Index: decl.c
===================================================================
--- decl.c	(revision 134433)
+++ decl.c	(working copy)
@@ -5683,11 +5683,12 @@ maybe_pad_type (tree type, tree size, un
 
   /* Unless debugging information isn't being written for the input type,
      write a record that shows what we are a subtype of and also make a
-     variable that indicates our size, if variable. */
+     variable that indicates our size, if still variable. */
   if (TYPE_NAME (record)
       && AGGREGATE_TYPE_P (type)
-      && (TREE_CODE (TYPE_NAME (type)) != TYPE_DECL
-	  || !DECL_IGNORED_P (TYPE_NAME (type))))
+      && TREE_CODE (orig_size) != INTEGER_CST
+      && !(TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
+	   && DECL_IGNORED_P (TYPE_NAME (type))))
     {
       tree marker = make_node (RECORD_TYPE);
       tree name = TYPE_NAME (record);