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* [Bug rtl-optimization/20291] New: combine throws away clobbers before tying to split
@ 2005-03-02 21:43 amylaar at gcc dot gnu dot org
2005-03-02 21:48 ` [Bug rtl-optimization/20291] " pinskia at gcc dot gnu dot org
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: amylaar at gcc dot gnu dot org @ 2005-03-02 21:43 UTC (permalink / raw)
To: gcc-bugs
When recog_for_combine fails to recognize a pattern as-is, it re-tries
with the clobbers stripped away. When it eventually fails, and the
caller try_combine tries to split the pattern, the clobbers are
gone, thus causing combine failures for bridge splitters that need
these clobbers.
patch is here:
http://gcc.gnu.org/ml/gcc-patches/2005-03/msg00177.html
--
Summary: combine throws away clobbers before tying to split
Product: gcc
Version: 3.3
Status: UNCONFIRMED
Keywords: missed-optimization
Severity: normal
Priority: P2
Component: rtl-optimization
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: amylaar at gcc dot gnu dot org
CC: gcc-bugs at gcc dot gnu dot org
OtherBugsDependingO 17652
nThis:
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20291
^ permalink raw reply [flat|nested] 5+ messages in thread* [Bug rtl-optimization/20291] combine throws away clobbers before tying to split 2005-03-02 21:43 [Bug rtl-optimization/20291] New: combine throws away clobbers before tying to split amylaar at gcc dot gnu dot org @ 2005-03-02 21:48 ` pinskia at gcc dot gnu dot org 2005-03-15 12:39 ` [Bug rtl-optimization/20291] combine throws away clobbers before trying " cvs-commit at gcc dot gnu dot org ` (2 subsequent siblings) 3 siblings, 0 replies; 5+ messages in thread From: pinskia at gcc dot gnu dot org @ 2005-03-02 21:48 UTC (permalink / raw) To: gcc-bugs -- What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Ever Confirmed| |1 Last reconfirmed|0000-00-00 00:00:00 |2005-03-02 21:47:58 date| | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20291 ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug rtl-optimization/20291] combine throws away clobbers before trying to split 2005-03-02 21:43 [Bug rtl-optimization/20291] New: combine throws away clobbers before tying to split amylaar at gcc dot gnu dot org 2005-03-02 21:48 ` [Bug rtl-optimization/20291] " pinskia at gcc dot gnu dot org @ 2005-03-15 12:39 ` cvs-commit at gcc dot gnu dot org 2005-03-15 14:07 ` amylaar at gcc dot gnu dot org 2005-04-20 2:17 ` pinskia at gcc dot gnu dot org 3 siblings, 0 replies; 5+ messages in thread From: cvs-commit at gcc dot gnu dot org @ 2005-03-15 12:39 UTC (permalink / raw) To: gcc-bugs ------- Additional Comments From cvs-commit at gcc dot gnu dot org 2005-03-15 12:39 ------- Subject: Bug 20291 CVSROOT: /cvs/gcc Module name: gcc Changes by: amylaar@gcc.gnu.org 2005-03-15 12:39:06 Modified files: gcc : ChangeLog combine.c Log message: PR rtl-optimization/20291 * combine.c (try_combine): If splitting fails, re-try with original combined pattern, i.e. before clobber stripping. Patches: http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.7857&r2=2.7858 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/combine.c.diff?cvsroot=gcc&r1=1.479&r2=1.480 -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20291 ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug rtl-optimization/20291] combine throws away clobbers before trying to split 2005-03-02 21:43 [Bug rtl-optimization/20291] New: combine throws away clobbers before tying to split amylaar at gcc dot gnu dot org 2005-03-02 21:48 ` [Bug rtl-optimization/20291] " pinskia at gcc dot gnu dot org 2005-03-15 12:39 ` [Bug rtl-optimization/20291] combine throws away clobbers before trying " cvs-commit at gcc dot gnu dot org @ 2005-03-15 14:07 ` amylaar at gcc dot gnu dot org 2005-04-20 2:17 ` pinskia at gcc dot gnu dot org 3 siblings, 0 replies; 5+ messages in thread From: amylaar at gcc dot gnu dot org @ 2005-03-15 14:07 UTC (permalink / raw) To: gcc-bugs ------- Additional Comments From amylaar at gcc dot gnu dot org 2005-03-15 14:07 ------- Fixed in mainline with patch applied today. -- What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution| |FIXED http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20291 ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug rtl-optimization/20291] combine throws away clobbers before trying to split 2005-03-02 21:43 [Bug rtl-optimization/20291] New: combine throws away clobbers before tying to split amylaar at gcc dot gnu dot org ` (2 preceding siblings ...) 2005-03-15 14:07 ` amylaar at gcc dot gnu dot org @ 2005-04-20 2:17 ` pinskia at gcc dot gnu dot org 3 siblings, 0 replies; 5+ messages in thread From: pinskia at gcc dot gnu dot org @ 2005-04-20 2:17 UTC (permalink / raw) To: gcc-bugs -- What |Removed |Added ---------------------------------------------------------------------------- Target Milestone|--- |4.1.0 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20291 ^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2005-04-20 2:09 UTC | newest] Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2005-03-02 21:43 [Bug rtl-optimization/20291] New: combine throws away clobbers before tying to split amylaar at gcc dot gnu dot org 2005-03-02 21:48 ` [Bug rtl-optimization/20291] " pinskia at gcc dot gnu dot org 2005-03-15 12:39 ` [Bug rtl-optimization/20291] combine throws away clobbers before trying " cvs-commit at gcc dot gnu dot org 2005-03-15 14:07 ` amylaar at gcc dot gnu dot org 2005-04-20 2:17 ` pinskia at gcc dot gnu dot org
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