* [Bug rtl-optimization/23453] [4.0/4.1 regression] miscompilation of PARI/GP on x86 with gcse after reload
[not found] <bug-23453-5724@http.gcc.gnu.org/bugzilla/>
@ 2005-10-14 11:38 ` bonzini at gcc dot gnu dot org
2005-10-31 5:09 ` mmitchel at gcc dot gnu dot org
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From: bonzini at gcc dot gnu dot org @ 2005-10-14 11:38 UTC (permalink / raw)
To: gcc-bugs
------- Comment #8 from bonzini at gcc dot gnu dot org 2005-10-14 11:38 -------
> gcse after reload may move loads from stack around stack pointer changes. here
> is simple workaround, it is supposed to prevent gcse after reload from touching
> expressions containing stack pointer at all.
Off the top of my head, if GCSE-after-reload is designed to remove redundant
spills, will it do *anything* with your patch?
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23453
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[not found] <bug-23453-5724@http.gcc.gnu.org/bugzilla/>
2005-10-14 11:38 ` [Bug rtl-optimization/23453] [4.0/4.1 regression] miscompilation of PARI/GP on x86 with gcse after reload bonzini at gcc dot gnu dot org
@ 2005-10-31 5:09 ` mmitchel at gcc dot gnu dot org
2005-11-05 10:48 ` steven at gcc dot gnu dot org
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From: mmitchel at gcc dot gnu dot org @ 2005-10-31 5:09 UTC (permalink / raw)
To: gcc-bugs
------- Comment #9 from mmitchel at gcc dot gnu dot org 2005-10-31 05:09 -------
Leaving as P2.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23453
^ permalink raw reply [flat|nested] 7+ messages in thread* [Bug rtl-optimization/23453] [4.0/4.1 regression] miscompilation of PARI/GP on x86 with gcse after reload
[not found] <bug-23453-5724@http.gcc.gnu.org/bugzilla/>
2005-10-14 11:38 ` [Bug rtl-optimization/23453] [4.0/4.1 regression] miscompilation of PARI/GP on x86 with gcse after reload bonzini at gcc dot gnu dot org
2005-10-31 5:09 ` mmitchel at gcc dot gnu dot org
@ 2005-11-05 10:48 ` steven at gcc dot gnu dot org
2005-12-15 6:50 ` [Bug rtl-optimization/23453] [4.0/4.1/4.2 " steven at gcc dot gnu dot org
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6 siblings, 0 replies; 7+ messages in thread
From: steven at gcc dot gnu dot org @ 2005-11-05 10:48 UTC (permalink / raw)
To: gcc-bugs
------- Comment #10 from steven at gcc dot gnu dot org 2005-11-05 10:48 -------
This doesn't fail for me with the test case from comment #6... :-(
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23453
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[not found] <bug-23453-5724@http.gcc.gnu.org/bugzilla/>
` (2 preceding siblings ...)
2005-11-05 10:48 ` steven at gcc dot gnu dot org
@ 2005-12-15 6:50 ` steven at gcc dot gnu dot org
2005-12-20 10:48 ` steven at gcc dot gnu dot org
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6 siblings, 0 replies; 7+ messages in thread
From: steven at gcc dot gnu dot org @ 2005-12-15 6:50 UTC (permalink / raw)
To: gcc-bugs
------- Comment #11 from steven at gcc dot gnu dot org 2005-12-15 06:50 -------
If nobody is going to fix gcse2, the right thing to do is to not set
flag_gcse_after_reload for optimize >= 3 in opts.c:
Index: opts.c
===================================================================
--- opts.c (revision 108560)
+++ opts.c (working copy)
@@ -588,7 +588,6 @@ decode_options (unsigned int argc, const
{
flag_inline_functions = 1;
flag_unswitch_loops = 1;
- flag_gcse_after_reload = 1;
}
if (optimize < 2 || optimize_size)
Obviously it would be better to just fix the bug, but so far I, for one, can't
get a handle on it.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23453
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[not found] <bug-23453-5724@http.gcc.gnu.org/bugzilla/>
` (3 preceding siblings ...)
2005-12-15 6:50 ` [Bug rtl-optimization/23453] [4.0/4.1/4.2 " steven at gcc dot gnu dot org
@ 2005-12-20 10:48 ` steven at gcc dot gnu dot org
2005-12-20 10:59 ` belyshev at depni dot sinp dot msu dot ru
2005-12-20 16:11 ` steven at gcc dot gnu dot org
6 siblings, 0 replies; 7+ messages in thread
From: steven at gcc dot gnu dot org @ 2005-12-20 10:48 UTC (permalink / raw)
To: gcc-bugs
------- Comment #12 from steven at gcc dot gnu dot org 2005-12-20 10:48 -------
Almost certainly a dup of PR25196
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23453
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[not found] <bug-23453-5724@http.gcc.gnu.org/bugzilla/>
` (4 preceding siblings ...)
2005-12-20 10:48 ` steven at gcc dot gnu dot org
@ 2005-12-20 10:59 ` belyshev at depni dot sinp dot msu dot ru
2005-12-20 16:11 ` steven at gcc dot gnu dot org
6 siblings, 0 replies; 7+ messages in thread
From: belyshev at depni dot sinp dot msu dot ru @ 2005-12-20 10:59 UTC (permalink / raw)
To: gcc-bugs
------- Comment #13 from belyshev at depni dot sinp dot msu dot ru 2005-12-20 10:59 -------
Marking as dup of bug 25196 because that bug contains simpler test case.
*** This bug has been marked as a duplicate of 25196 ***
--
belyshev at depni dot sinp dot msu dot ru changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |DUPLICATE
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23453
^ permalink raw reply [flat|nested] 7+ messages in thread* [Bug rtl-optimization/23453] [4.0/4.1/4.2 regression] miscompilation of PARI/GP on x86 with gcse after reload
[not found] <bug-23453-5724@http.gcc.gnu.org/bugzilla/>
` (5 preceding siblings ...)
2005-12-20 10:59 ` belyshev at depni dot sinp dot msu dot ru
@ 2005-12-20 16:11 ` steven at gcc dot gnu dot org
6 siblings, 0 replies; 7+ messages in thread
From: steven at gcc dot gnu dot org @ 2005-12-20 16:11 UTC (permalink / raw)
To: gcc-bugs
------- Comment #14 from steven at gcc dot gnu dot org 2005-12-20 16:11 -------
The patch proposed in bug 25196 comment #8 indeed makes the test case from
comment #6 in this PR work (at least, it stops it from segfaulting).
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23453
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