re PR debug/42991 (cfgexpand.c:2487: Conditional jump or move depends on uninitialised value(s))

2010-02-07  Richard Guenther  <rguenther@suse.de>

	PR middle-end/42991
	* expr.c (get_inner_reference): Always initialize *pbitsize.

From-SVN: r156575

gcc/ChangeLog

 2010-02-07  Richard Guenther  <rguenther@suse.de>
 
+	PR middle-end/42991
+	* expr.c (get_inner_reference): Always initialize *pbitsize.
+
+2010-02-07  Richard Guenther  <rguenther@suse.de>
+
 	PR middle-end/42956
 	* gimplify.c (gimple_fold_indirect_ref): Avoid generating
 	new ARRAY_REFs on variable size element or minimal index arrays.

gcc/expr.c

@@ -5968,6 +5968,7 @@ get_inner_reference (tree exp, HOST_WIDE_INT *pbitsize,
 
   /* First get the mode, signedness, and size.  We do this from just the
      outermost expression.  */
+  *pbitsize = -1;
   if (TREE_CODE (exp) == COMPONENT_REF)
     {
       tree field = TREE_OPERAND (exp, 1);