tree-ssa-structalias.c (get_constraint_for_component_ref): Never override with anything constraint.

2006-01-10  Richard Guenther  <rguenther@suse.de>

	* tree-ssa-structalias.c (get_constraint_for_component_ref):
	Never override with anything constraint.

From-SVN: r109544

gcc/ChangeLog

+2006-01-10  Richard Guenther  <rguenther@suse.de>
+
+	* tree-ssa-structalias.c (get_constraint_for_component_ref):
+	Never override with anything constraint.
+
 2006-01-10  Jan Beulich  <jbeulich@novell.com>
 
 	* config/i386/i386.c (ix86_data_alignment): Don't force alignment to

gcc/tree-ssa-structalias.c

@@ -2373,6 +2373,7 @@ get_constraint_for_component_ref (tree t, VEC(ce_s, heap) **results)
   t = get_ref_base_and_extent (t, &bitpos, &bitsize, &bitmaxsize);
   get_constraint_for (t, results);
   result = VEC_last (ce_s, *results);
+  result->offset = bitpos;
 
   gcc_assert (beforelength + 1 == VEC_length (ce_s, *results));
 
@@ -2380,18 +2381,6 @@ get_constraint_for_component_ref (tree t, VEC(ce_s, heap) **results)
   if (TREE_CODE (t) != ADDR_EXPR && result->type == ADDRESSOF)
     result->type = SCALAR;
  
-  /* If we know where this goes, then yay. Otherwise, booo. */
-  if (bitmaxsize != -1
-      && bitsize == bitmaxsize)
-    {
-      result->offset = bitpos;
-    }
-  else
-    {
-      result->var = anything_id;
-      result->offset = 0;      
-    }
-
   if (result->type == SCALAR)
     {
       /* In languages like C, you can access one past the end of an
@@ -2409,7 +2398,7 @@ get_constraint_for_component_ref (tree t, VEC(ce_s, heap) **results)
 	  for (curr = get_varinfo (result->var); curr; curr = curr->next)
 	    {
 	      if (offset_overlaps_with_access (curr->offset, curr->size,
-					       result->offset, bitsize))
+					       result->offset, bitmaxsize))
 		{
 		  result->var = curr->id;
 		  break;