tree-ssa-pre.c (create_expression_by_pieces): Fold the last statement.

2011-09-09  Richard Guenther  <rguenther@suse.de>

	* tree-ssa-pre.c (create_expression_by_pieces): Fold the
	last statement.

From-SVN: r178727

gcc/ChangeLog

 2011-09-09  Richard Guenther  <rguenther@suse.de>
 
+	* tree-ssa-pre.c (create_expression_by_pieces): Fold the
+	last statement.
+
+2011-09-09  Richard Guenther  <rguenther@suse.de>
+
 	* gimple.h (fold_stmt_inplace): Adjust to take a gimple_stmt_iterator
 	instead of a statement.
 	* gimple-fold.c (fold_stmt_inplace): Likewise.

gcc/tree-ssa-pre.c

@@ -3182,6 +3182,10 @@ create_expression_by_pieces (basic_block block, pre_expr expr,
   /* All the symbols in NEWEXPR should be put into SSA form.  */
   mark_symbols_for_renaming (newstmt);
 
+  /* Fold the last statement.  */
+  gsi = gsi_last (*stmts);
+  fold_stmt_inplace (&gsi);
+
   /* Add a value number to the temporary.
      The value may already exist in either NEW_SETS, or AVAIL_OUT, because
      we are creating the expression by pieces, and this particular piece of