http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57003
Bernd Schmidt bernds at gcc dot gnu.org changed:
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CC||bernds
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57003
--- Comment #14 from Kirill Smirnov kirill.k.smirnov at math dot spbu.ru
2013-04-24 16:06:41 UTC ---
Created attachment 29929
-- http://gcc.gnu.org/bugzilla/attachment.cgi?id=29929
gcc -E output.
Attached gcc -E output. Lines around
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57003
Kirill Smirnov kirill.k.smirnov at math dot spbu.ru changed:
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CC|
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57003
Jakub Jelinek jakub at gcc dot gnu.org changed:
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CC||jakub at
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57003
--- Comment #9 from Kirill Smirnov kirill.k.smirnov at math dot spbu.ru
2013-04-23 15:56:59 UTC ---
... whatever memcpy implementation you are calling and see whether it
correctly returns the first argument it has been passed to it in all
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57003
--- Comment #10 from Jakub Jelinek jakub at gcc dot gnu.org 2013-04-23
16:00:52 UTC ---
But __builtin_memcpy isn't necessarily the inline memcpy code, it can very well
be a library call too.
Anyway, this bugreport doesn't have a
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57003
--- Comment #11 from Kirill Smirnov kirill.k.smirnov at math dot spbu.ru
2013-04-23 21:33:10 UTC ---
I'm sorry I cannot reproduce invalid behaviour within a refined test case.
Instead I can provide commented asm dump from wine.
This
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57003
--- Comment #12 from Kirill Smirnov kirill.k.smirnov at math dot spbu.ru
2013-04-23 22:01:18 UTC ---
I' sorry, forgot to mention compiler flags: -O2 -g
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57003
--- Comment #6 from dank at kegel dot com 2013-04-22 16:39:37 UTC ---
You'd think... but I didn't find any obvious memcpy replacement.
I spent some time bisecting the wine source yesterday. There appear to be
at least three or four
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57003
dank at kegel dot com changed:
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57003
--- Comment #5 from Andrew Pinski pinskia at gcc dot gnu.org 2013-04-21
18:06:36 UTC ---
(In reply to comment #4)
Next step may be to bisect wine's source code to see which file or files
misbehave when built with -O2 but without
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57003
Richard Biener rguenth at gcc dot gnu.org changed:
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Status|UNCONFIRMED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57003
Andrew Pinski pinskia at gcc dot gnu.org changed:
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Component|c
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57003
--- Comment #2 from Andrew Pinski pinskia at gcc dot gnu.org 2013-04-19
01:00:03 UTC ---
(In reply to comment #1)
IIRC this is usually due to mis writing of memcpy/memset where you return null
rather than the dest (first argument).
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