[committed] Handle BUILT_IN_ASSUME_ALIGNED in tree-object-size.c

[Jakub Jelinek]

Hi!

__builtin_assume_aligned is a pass thru call, preserves
object size.

Bootstrapped/regtested on x86_64-linux and i686-linux, committed
as obvious.

2011-07-01  Jakub Jelinek  <ja...@redhat.com>

        * tree-object-size.c (pass_through_call): Handle
        BUILT_IN_ASSUME_ALIGNED.

--- gcc/tree-object-size.c.jj   2011-06-15 11:54:43.000000000 +0200
+++ gcc/tree-object-size.c      2011-07-01 10:23:53.361527213 +0200
@@ -1,5 +1,5 @@
 /* __builtin_object_size (ptr, object_size_type) computation
-   Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010
+   Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
    Free Software Foundation, Inc.
    Contributed by Jakub Jelinek <ja...@redhat.com>
 
@@ -464,6 +464,7 @@ pass_through_call (const_gimple call)
       case BUILT_IN_STRNCPY_CHK:
       case BUILT_IN_STRCAT_CHK:
       case BUILT_IN_STRNCAT_CHK:
+      case BUILT_IN_ASSUME_ALIGNED:
        if (gimple_call_num_args (call) >= 1)
          return gimple_call_arg (call, 0);
        break;

        Jakub