--- Comment #11 from doko at ubuntu dot com 2008-07-25 13:54 ---
the suggested change fixes the OpenJDK build.
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36917
--- Comment #10 from rguenth at gcc dot gnu dot org 2008-07-25 12:14
---
I belive this is just INVALID. The code seems to do lots of things with
this enum Cell, but the C++ compiler is allowed to just allocate 1 bit of
storage for it.
Maybe changing the Cell declaration to
enum Cell
--- Comment #9 from rguenth at gcc dot gnu dot org 2008-07-24 09:52 ---
The difference comes from the second VRP pass which concludes that c_76 is
[1, +INF] from which it changes
# c_173 = PHI <0(7), c_76(12)>
to
# c_173 = PHI <0(7), 1(12)>
which it concludes from
c_76 = (Cell) D.15
--- Comment #8 from rguenth at gcc dot gnu dot org 2008-07-24 09:31 ---
Looking at the source I don't see any integer overflows - the fact that
-fno-ivopts makes it work and the effect is on a variable introduced by
ivopts hints at a GCC bug more than a application bug.
So - now I canno
--- Comment #7 from doko at ubuntu dot com 2008-07-24 09:31 ---
Created an attachment (id=15952)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=15952&action=view)
preprocessed source (no pch used)
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36917
--- Comment #6 from pinskia at gcc dot gnu dot org 2008-07-24 09:27 ---
if -fwrapv works then is really a bug? Yes overflow is defined in java but c++
is not java.
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pinskia at gcc dot gnu dot org changed:
What|Removed |Added
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--- Comment #5 from doko at ubuntu dot com 2008-07-24 09:15 ---
-O3 and -fwrapv, r136501 not reverted works
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36917
--- Comment #4 from doko at ubuntu dot com 2008-07-24 09:07 ---
Created an attachment (id=15951)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=15951&action=view)
diff of tree dump
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36917
--- Comment #3 from doko at ubuntu dot com 2008-07-24 09:06 ---
Created an attachment (id=15950)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=15950&action=view)
tree dump (r136501)
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36917
--- Comment #2 from doko at ubuntu dot com 2008-07-24 09:06 ---
Created an attachment (id=15949)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=15949&action=view)
tree dump (r136501 reverted)
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36917
--- Comment #1 from doko at ubuntu dot com 2008-07-24 09:05 ---
Created an attachment (id=15948)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=15948&action=view)
preprocessed source
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36917
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