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From: "ptrktn at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/39757] New: inconsistency in array bounds checking with -O3
Date: Tue, 14 Apr 2009 02:58:00 -0000 [thread overview]
Message-ID: <bug-39757-17568@http.gcc.gnu.org/bugzilla/> (raw)
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gcc version:
Using built-in specs.
Target: i486-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian 4.3.2-1.1'
--with-bugurl=file:///usr/share/doc/gcc-4.3/README.Bugs
--enable-languages=c,c++,fortran,objc,obj-c++ --prefix=/usr --enable-shared
--with-system-zlib --libexecdir=/usr/lib --without-included-gettext
--enable-threads=posix --enable-nls --with-gxx-include-dir=/usr/include/c++/4.3
--program-suffix=-4.3 --enable-clocale=gnu --enable-libstdcxx-debug
--enable-objc-gc --enable-mpfr --enable-targets=all --enable-cld
--enable-checking=release --build=i486-linux-gnu --host=i486-linux-gnu
--target=i486-linux-gnu
Thread model: posix
gcc version 4.3.2 (Debian 4.3.2-1.1)
system type: Linux debian 2.6.26-1-686 #1 SMP Fri Mar 13 18:08:45 UTC 2009 i686
GNU/Linux
command line:
gcc -DNO_LCMS -Wall -Werror -O3 -c -o dcraw.o dcraw.c
source files:
curl -O 'http://www.cybercom.net/~dcoffin/dcraw/dcraw.c'
description of the expected behavior:
Compiles without errors.
description of actual behavior:
cc1: warnings being treated as errors
dcraw.c: In function ‘adobe_coeff’:
dcraw.c:6493: error: array subscript is above array bounds
dcraw.c:6493: error: array subscript is above array bounds
dcraw.c:6493: error: array subscript is above array bounds
dcraw.c:6493: error: array subscript is above array bounds
dcraw.c:6493: error: array subscript is above array bounds
dcraw.c:6493: error: array subscript is above array bounds
dcraw.c:6493: error: array subscript is above array bounds
dcraw.c:6493: error: array subscript is above array bounds
dcraw.c:6493: error: array subscript is above array bounds
dcraw.c: In function ‘parse_phase_one’:
dcraw.c:5751: error: array subscript is above array bounds
dcraw.c:5751: error: array subscript is above array bounds
dcraw.c:5751: error: array subscript is above array bounds
dcraw.c:5751: error: array subscript is above array bounds
dcraw.c:5751: error: array subscript is above array bounds
dcraw.c:5751: error: array subscript is above array bounds
The inconsistency hcc1: warnings being treated as errors
dcraw.c: In function ‘adobe_coeff’:
dcraw.c:6493: error: array subscript is above array bounds
dcraw.c:6493: error: array subscript is above array bounds
dcraw.c:6493: error: array subscript is above array bounds
dcraw.c:6493: error: array subscript is above array bounds
dcraw.c:6493: error: array subscript is above array bounds
dcraw.c:6493: error: array subscript is above array bounds
dcraw.c:6493: error: array subscript is above array bounds
dcraw.c:6493: error: array subscript is above array bounds
dcraw.c:6493: error: array subscript is above array bounds
dcraw.c: In function ‘parse_phase_one’:
dcraw.c:5751: error: array subscript is above array bounds
dcraw.c:5751: error: array subscript is above array bounds
dcraw.c:5751: error: array subscript is above array bounds
dcraw.c:5751: error: array subscript is above array bounds
dcraw.c:5751: error: array subscript is above array bounds
dcraw.c:5751: error: array subscript is above array bounds
For one, the compiler considers it an issues that array cam_xyz[4][3] is
accessed as cam_xyz[0][j], 0 <= j < 12. This issue is found with -O3 but not
with -O2.
The inconsistency, which I see is a bug, is that romm_camm[3][3] which is
accessed as romm_cam[0][i], i <= j < 9, does not raise an error even after the
above two cases are fixed.
--
Summary: inconsistency in array bounds checking with -O3
Product: gcc
Version: 4.3.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: ptrktn at gmail dot com
GCC build triplet: i486-linux-gnu
GCC host triplet: i686-linux-gnu
GCC target triplet: i486-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39757
next reply other threads:[~2009-04-14 2:58 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-14 2:58 ptrktn at gmail dot com [this message]
2009-04-14 3:00 ` [Bug middle-end/39757] " pinskia at gcc dot gnu dot org
2009-04-20 22:56 ` manu at gcc dot gnu dot org
2009-08-05 10:01 ` manu at gcc dot gnu dot org
2009-08-13 1:15 ` petteri dot kettunen at nokia dot com
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