[Bug middle-end/54364] Tail call jumps not threaded

[amker at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54364

--- Comment #3 from amker at gcc dot gnu.org 2012-09-19 07:40:21 UTC ---
Author: amker
Date: Wed Sep 19 07:40:15 2012
New Revision: 191462

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=191462
Log:
    PR middle-end/54364
    * bb-reorder.c (connect_better_edge_p): New added.
    (find_traces_1_round): When optimizing for size, ignore edge frequency
    and probability, and handle all in one round.
    (bb_to_key): Use bb->index as key when optimizing for size.
    (better_edge_p): The bb with smaller index is better when optimizing
    for size.
    (connect_traces): When optimizing for size, connect block n with
    block n + 1; connect trace m with trace m + 1 if falling through.
    (gate_handle_reorder_blocks): Enable bbro when optimizing for -Os.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/bb-reorder.c