* 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.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@203895
138bc75d-0d04-0410-961f-
82ee72b054a4