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[Bug target/43920] Choosing conditional execution over conditional branches for code size in some cases.
- From: "vries at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Thu, 7 Apr 2011 08:10:39 +0000
- Subject: [Bug target/43920] Choosing conditional execution over conditional branches for code size in some cases.
- Auto-submitted: auto-generated
- References: <bug-43920-4@http.gcc.gnu.org/bugzilla/>
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 <tom@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