--- Comment #14 from steven at gcc dot gnu dot org 2008-09-21 13:14 ---
I can reproduce this on-and-off, but never with a reasonable test case.
It's unlikely that anyone is interested in fixing this, esp. given that RTL
PRE/CPROP are doing less and less these days as the tree
--- Comment #13 from steven at gcc dot gnu dot org 2008-05-24 15:37 ---
This happens again on PPC. No test case yet.
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steven at gcc dot gnu dot org changed:
What|Removed |Added
--- Comment #12 from steven at gcc dot gnu dot org 2007-11-14 10:01 ---
I haven't been able to reproduce this for a while. Probably got fixed
somewhere along the way.
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steven at gcc dot gnu dot org changed:
What|Removed |Added
--- Comment #7 from steven at gcc dot gnu dot org 2006-04-20 20:53 ---
I have tested this test case again with lcm.c patched with the patch below to
check for insertions on edges where an expression is already available. The
abort does not trigger.
The version of GCC that I patched and
--- Comment #8 from steven at gcc dot gnu dot org 2006-04-20 21:13 ---
Created an attachment (id=11306)
-- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=11306action=view)
CFG at the start of gcse
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16967
--- Comment #9 from steven at gcc dot gnu dot org 2006-04-20 21:14 ---
Created an attachment (id=11307)
-- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=11307action=view)
LCM dataflow solution for the first gcse pass
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16967
--- Comment #10 from steven at gcc dot gnu dot org 2006-04-20 21:15 ---
Created an attachment (id=11308)
-- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=11308action=view)
LCM dataflow solution for the second gcse pass
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16967
--- Comment #11 from steven at gcc dot gnu dot org 2006-04-20 21:16 ---
One of these days someone should manually compute the LCM sets from attachments
1, 2, and 3 ...
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steven at gcc dot gnu dot org changed:
What|Removed |Added
--- Additional Comments From steven at gcc dot gnu dot org 2005-05-04
23:03 ---
I can't trigger this problem anymore with the test case from my
original report. I will try to come up with a new test case.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16967
--- Additional Comments From dberlin at gcc dot gnu dot org 2005-05-04
01:16 ---
PRE should notice the value is AVAIL in the block it's placing it in, so it
shouldn't end up in the insert bitmap.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16967
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