re PR c/33726 (Type checking error with address-of and volatile and arrays)

2007-10-11  Richard Guenther  <rguenther@suse.de>

	PR c/33726
	* c-typeck.c (build_array_ref): Do not strip qualifiers from
	the array element type.

	* gcc.dg/pr33726.c: New testcase.

From-SVN: r129227

gcc/ChangeLog

+2007-10-11  Richard Guenther  <rguenther@suse.de>
+
+	PR c/33726
+	* c-typeck.c (build_array_ref): Do not strip qualifiers from
+	the array element type.
+
 2007-10-11  Eric Botcazou  <ebotcazou@libertysurf.fr>
 
 	PR rtl-optimization/33638

gcc/c-typeck.c

@@ -2113,8 +2113,6 @@ build_array_ref (tree array, tree index)
 	}
 
       type = TREE_TYPE (TREE_TYPE (array));
-      if (TREE_CODE (type) != ARRAY_TYPE)
-	type = TYPE_MAIN_VARIANT (type);
       rval = build4 (ARRAY_REF, type, array, index, NULL_TREE, NULL_TREE);
       /* Array ref is const/volatile if the array elements are
 	 or if the array is.  */

gcc/testsuite/ChangeLog

+2007-10-11  Richard Guenther  <rguenther@suse.de>
+
+	PR c/33726
+	* gcc.dg/pr33726.c: New testcase.
+
 2007-10-11  Uros Bizjak  <ubizjak@gmail.com>
 
 	PR fortran/33500

gcc/testsuite/gcc.dg/pr33726.c

+/* { dg-do compile } */
+
+/* We used to ICE here with type-checking enabled.  */
+
+typedef unsigned int U032;
+typedef volatile struct X {
+     U032 Monochrome[1];
+     struct {
+          U032 WidthHeight;
+     } UnclippedRectangle[1];
+} RivaBitmap;
+void writel(void *);
+void rivafb_fillrect(RivaBitmap *bm)
+{
+  writel((void *)&bm->UnclippedRectangle[0].WidthHeight);
+}
+