[Bug target/43920] Choosing conditional execution over conditional branches for code size in some cases.

[vries at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43920

--- Comment #10 from vries at gcc dot gnu.org 2011-04-07 08:10:38 UTC ---
Author: vries
Date: Thu Apr  7 08:10:34 2011
New Revision: 172090

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=172090
Log:
2011-04-07  Tom de Vries  <t...@codesourcery.com>

    PR target/43920
    * cfgcleanup.c (equal_different_set_p, can_replace_by, merge_dir): New
    function.
    (old_insns_match_p): Change return type.  Replace return false/true with
    return dir_none/dir_both.  Use can_replace_by.
    (flow_find_cross_jump): Add dir_p parameter.  Init replacement direction
    from dir_p.  Register replacement direction in dir, last_dir and
    afterlast_dir.    Handle new return type of old_insns_match_p using
    merge_dir.  Return replacement direction in dir_p.
    (flow_find_head_matching_sequence, outgoing_edges_match): Handle new
    return type of old_insns_match_p.
    (try_crossjump_to_edge): Add argument to call to flow_find_cross_jump.
    * ifcvt.c ( cond_exec_process_if_block): Add argument to call to
    flow_find_cross_jump.
    * basic-block.h (enum replace_direction): New type.
    (flow_find_cross_jump): Add parameter to declaration.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/basic-block.h
    trunk/gcc/cfgcleanup.c
    trunk/gcc/ifcvt.c