* tree-ssa-threadupdate.c (redirection_data): Record two
duplicated blocks instead of just one.
(local_info): Explain why we don't create a template for the
second duplicated block in a thread path.
(create_block_for_threading): Accept argument indicating array
index into redirection_data to store its result.
(lookup_redirection_data): Initialize both duplicate blocks.
(ssa_create_duplicates): If a jump threading path needs multiple
blocks duplicated, then duplicate them.
(ssa_fix_duplicate_block_edges): Corresponding changes.
(ssa_fixup_template_block, thread_single_edge): Likewise.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@204982
138bc75d-0d04-0410-961f-
82ee72b054a4