backport: 20071210-2.c: New testcase.

backport: 20071210-2.c: New testcase.

Backport from mainline:

gcc/testsuite/Changelog:

2009-04-28  Alexander Monakov  <amonakov@ispras.ru>
        * gcc.target/ia64/20071210-2.c: New testcase.

gcc/Changelog:

2009-04-28  Alexander Monakov  <amonakov@ispras.ru>
        * sel-sched-ir.c (maybe_tidy_empty_bb): Do not attempt to delete a
        block if there are complex incoming edges.
        (sel_merge_blocks): Remove useless assert.
        (sel_redirect_edge_and_branch): Check that edge was redirected.
        * sel-sched-ir.h (_eligible_successor_edge_p): Remove assert.
        (sel_find_rgns): Delete declaration.
        * sel-sched.c (purge_empty_blocks): Attempt to remove first block of
        the region when it is not a preheader.

From-SVN: r163497