https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70263
Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |law at gcc dot gnu.org,
| |mpolacek at gcc dot gnu.org
--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Started with r203895:
commit 4bc0f16ebd21b15d624ebbf8efa88c9c2f1df367
Author: law <law@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Mon Oct 21 15:25:09 2013 +0000
* tree-ssa-threadedge.c (thread_through_normal_block): New argument
VISITED.
Remove VISISTED as a local variable. When we have a threadable
jump, verify
the destination of the jump has not been visised.
(thread_across_edge): Allocate VISITED bitmap once at function
scope and
use it throughout. Make sure to set appropriate bits in VISITED
for E (start
of jump thread path).
* tree-ssa-threadupdate.c (mark_threaded_blocks): Reject threading
through
a joiner if any edge on the path has a recorded jump thread.
