r197510 - in /branches/gcc-4_6-branch/gcc: Chan...

[ramana@gcc.gnu.org]

Author: ramana
Date: Fri Apr  5 08:31:13 2013
New Revision: 197510

URL: http://gcc.gnu.org/viewcvs?rev=197510&root=gcc&view=rev
Log:
Fix PR48308 for the 4.6 branch.

2013-04-05  Ramana Radhakrishnan  <ramana.radhakrishnan@arm.com>

	PR rtl-optimization/48308
	* combine.c (enum undo_kind): Add UNDO_LINKS.
	(do_SUBST): Check for oldval.
	(do_SUBST_LINK): Define.
	(SUBST_LINK): Define.
	(try_combine): Use SUBST_LINK.
	(undo_all): Handle UNDO_LINKS.


Modified:
    branches/gcc-4_6-branch/gcc/ChangeLog
    branches/gcc-4_6-branch/gcc/combine.c