2008-08-20  Richard Guenther  <rguenther@suse.de>

	* tree-ssa-ccp.c (maybe_fold_stmt_indirect): Do not mess
	with TREE_THIS_VOLATILE on shared nodes.
	(fold_stmt_r): Likewise.

	* gcc.c-torture/compile/20080820-1.c: New testcase.

From-SVN: r139325