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--- Comment #4 from jakub at gcc dot gnu dot org 2007-11-20 10:59 ---
The testcase is wrong, static unsigned char sbox[] = {}; means zero sized
array.
But using sbox[256] makes the testcase valid and the problem is still there.
This looks like a bug in can_convert_to_perfect_nest, this l
Package: gcc-4.2
Version: 4.2.2-3
Severity: important
At least gcc-4.2 and gcc-4.1 but probably also earlier versions are affected
by a bug discussed on the linux-kernel list [1].
The following test program will result in "OMG,-10==10 in linux!" when
compiled with both gcc-4.1 and gcc-4.2.
int m
Processing commands for [EMAIL PROTECTED]:
> clone 452081 -1
Bug#452081: makedb broken on alpha/sid
Bug 452081 cloned as bug 452110.
> reassign -1 gcc-4.2
Bug#452110: makedb broken on alpha/sid
Bug reassigned from package `libc6.1' to `gcc-4.2'.
> retitle -1 gcc-4.2 generates bad code on alpha
B
Processing commands for [EMAIL PROTECTED]:
> tags 452108 + patch
Bug#452108: gcc-4.2: Incorrect results with abs()
There were no tags set.
Tags added: patch
> clone 452108 -1 -2 -3
Bug#452108: gcc-4.2: Incorrect results with abs()
Bug 452108 cloned as bugs 452113-452115.
> reassign -1 gcc-4.1 4.
On Tue, Nov 20, 2007 at 03:09:17PM +0100, Frans Pop wrote:
> The following test program will result in "OMG,-10==10 in linux!" when
> compiled with both gcc-4.1 and gcc-4.2.
Further information:
| int i = 2;
| int a = -10 * abs (i - 1);
| int b = 10 * abs (i - 1);
compiles to (original tree)
| in
Processing commands for [EMAIL PROTECTED]:
> # Automatically generated email from bts, devscripts version 2.9.26
> tags 452108 + fixed-upstream
Bug#452108: gcc-4.2: Incorrect results with abs()
Tags were: patch
Tags added: fixed-upstream
>
End of message, stopping processing here.
Please contact
Processing commands for [EMAIL PROTECTED]:
> # Automatically generated email from bts, devscripts version 2.9.26
> forwarded 452108 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34130
Bug#452108: gcc-4.2: Incorrect results with abs()
Noted your statement that Bug has been forwarded to
http://gcc.gn
tags 452108 + patch
clone 452108 -1 -2 -3
reassign -1 gcc-4.1 4.1.2-17
reassign -2 gcc-3.3 1:3.3.6-15
reassign -3 gcc-3.4 3.4.6-6
thanks
On Tuesday 20 November 2007, Frans Pop wrote:
> The following test program will result in "OMG,-10==10 in linux!" when
> compiled with both gcc-4.1 and gcc-4.2.
Processing commands for [EMAIL PROTECTED]:
> found 452113 4.1.1-21
Bug#452113: gcc-4.2: Incorrect results with abs()
Bug marked as found in version 4.1.1-21.
> found 452114 3.3.5-13
Bug#452114: gcc-4.2: Incorrect results with abs()
Bug marked as found in version 3.3.5-13.
> found 452114 3.3.6-15
Processing commands for [EMAIL PROTECTED]:
> # Use correct versions
> notfound 452114 3.3.5-13
Bug#452114: gcc-4.2: Incorrect results with abs()
Bug no longer marked as found in version 3.3.5-13.
> notfound 452114 3.3.6-15
Bug#452114: gcc-4.2: Incorrect results with abs()
Bug no longer marked as
found 452113 4.1.1-21
found 452114 3.3.5-13
found 452114 3.3.6-15
found 452115 3.4.3-13sarge1
found 452115 3.4.6-5
thanks
On Tuesday 20 November 2007, Frans Pop wrote:
> Just tested that gcc-3.3 and gcc-3.4 are also affected.
Sarge and Etch versions of 3.3, 3.4 and 4.1 are affected as well.
gcc-2
gnat-4.2_4.2.2-3_hppa.changes uploaded successfully to localhost
along with the files:
gnat-4.2-base_4.2.2-3_hppa.deb
libgnatprj-dev_4.2.2-3_hppa.deb
libgnatprj4.2_4.2.2-3_hppa.deb
libgnatprj4.2-dbg_4.2.2-3_hppa.deb
libgnat-4.2_4.2.2-3_hppa.deb
libgnat-4.2-dbg_4.2.2-3_hppa.deb
libgnat
Rejected: gnat-4.2_4.2.2-3_hppa.changes: a file with this name already exists
in the Done directory.
Rejected: libgnat-4.2-dbg_4.2.2-3_hppa.deb: old version (4.2.2-3) in unstable
>= new version (4.2.2-3) targeted at unstable.
Rejected: libgnat-4.2-dbg_4.2.2-3_hppa.deb: can not overwrite existing
> Note that this issue is in theory pretty serious as in principle
_any_
> binary package in the archive could be affected.
Since the abs() is optimized away on miscompilations, searching for
binaries that have the abs() symbol won't find the buggy ones.
The only reliable way to find out what pac
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