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From: "pangbw at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/59124] [4.9/5/6 Regression] Wrong warnings "array subscript is above array bounds"
Date: Fri, 18 Sep 2015 21:11:00 -0000 [thread overview]
Message-ID: <bug-59124-4-OWH6PUE2Sx@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-59124-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59124
--- Comment #31 from baoshan <pangbw at gmail dot com> ---
(In reply to Manuel López-Ibáñez from comment #30)
> (In reply to baoshan from comment #29)
> > > However, it is clear that _14 = baz[_9] is executed only 5 times (not 5
> > > times + 1). Why is this estimate wrong?
> >
> > The max value of n is 6, so the max value of i is 5 as "i < n", then the max
> > value of j is 4 as "j = i - 1" which means the max iterate times is 4.
>
> True! Well, that reinforces my point that something is very wrong in the
> estimation. What is it?
At the pass "cunrolli", it infers the iterative times by checking the array's
boundary, as we have "unsigned baz[6];", it would think the max value of
iterative times is 6.
>From gcc-bugs-return-497545-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 18 21:39:25 2015
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From: "trippels at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/67631] brace initialization bug
Date: Fri, 18 Sep 2015 21:39:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67631
Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |rejects-valid
Status|UNCONFIRMED |NEW
Last reconfirmed| |2015-09-18
CC| |trippels at gcc dot gnu.org
Ever confirmed|0 |1
Known to fail| |4.9.2, 5.2.1, 6.0
--- Comment #1 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
markus@x4 tmp % cat bra.ii
class X
{
public:
X (int);
explicit operator unsigned ();
};
unsigned
foo ()
{
return unsigned{ X (0) };
}
markus@x4 tmp % icpc -Wall -Wextra -c -std=c++14 bra.ii
markus@x4 tmp % clang++ -Wall -Wextra -c -std=c++14 bra.ii
markus@x4 tmp % g++ -Wall -Wextra -c -std=c++14 bra.ii
bra.ii: In function ‘unsigned int foo()’:
bra.ii:10:26: error: cannot convert ‘X’ to ‘unsigned int’ in initialization
return unsigned{ X (0) };
^
>From gcc-bugs-return-497546-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 18 21:48:54 2015
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From: "trippels at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/67632] explicit instantiation omits copy constructor and others
Date: Fri, 18 Sep 2015 21:48:00 -0000
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |trippels at gcc dot gnu.org
Resolution|--- |WORKSFORME
--- Comment #1 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
I cannot reproduce this issue with 4.9.3. Please update.
next prev parent reply other threads:[~2015-09-18 21:11 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-14 0:44 [Bug tree-optimization/59124] New: [4.8 " d.g.gorbachev at gmail dot com
2013-11-14 9:51 ` [Bug tree-optimization/59124] [4.8/4.9 " rguenth at gcc dot gnu.org
2013-11-14 17:56 ` d.g.gorbachev at gmail dot com
2013-11-21 14:39 ` rguenth at gcc dot gnu.org
2014-03-12 14:33 ` jakub at gcc dot gnu.org
2014-05-22 9:03 ` [Bug tree-optimization/59124] [4.8/4.9/4.10 " rguenth at gcc dot gnu.org
2014-12-19 13:25 ` [Bug tree-optimization/59124] [4.8/4.9/5 " jakub at gcc dot gnu.org
2015-01-27 9:50 ` rguenth at gcc dot gnu.org
2015-01-27 10:59 ` rguenth at gcc dot gnu.org
2015-02-18 2:22 ` solar-gcc at openwall dot com
2015-02-18 4:37 ` solar-gcc at openwall dot com
2015-02-19 14:14 ` rguenth at gcc dot gnu.org
2015-02-24 13:09 ` rguenth at gcc dot gnu.org
2015-04-16 12:14 ` [Bug tree-optimization/59124] [4.8/4.9/5/6 " georgmueller at gmx dot net
2015-05-26 15:34 ` georgmueller at gmx dot net
2015-06-01 23:49 ` daniel at imperfectcode dot com
2015-06-23 8:16 ` rguenth at gcc dot gnu.org
2015-06-26 19:53 ` [Bug tree-optimization/59124] [4.9/5/6 " jakub at gcc dot gnu.org
2015-06-26 20:26 ` jakub at gcc dot gnu.org
2015-09-10 21:04 ` pangbw at gmail dot com
2015-09-11 0:29 ` manu at gcc dot gnu.org
2015-09-11 16:13 ` pangbw at gmail dot com
2015-09-11 16:51 ` manu at gcc dot gnu.org
2015-09-17 18:18 ` pangbw at gmail dot com
2015-09-17 19:02 ` pangbw at gmail dot com
2015-09-18 17:59 ` pangbw at gmail dot com
2015-09-18 18:32 ` manu at gcc dot gnu.org
2015-09-18 19:17 ` manu at gcc dot gnu.org
2015-09-18 21:11 ` pangbw at gmail dot com [this message]
2015-09-22 20:06 ` pangbw at gmail dot com
2021-01-05 9:14 ` [Bug tree-optimization/59124] [6 " szotsaki at gmail dot com
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