Bug#63154: marked as done (gcc 2.7.2.3 optimizer bug for long long comparisons)
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and subject line closing gcc272 bugs
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From: Richard Kettlewell <rjk@sfere.greenend.org.uk>
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Date: Thu, 27 Apr 2000 17:01:23 +0100 (BST)
To: submit@bugs.debian.org
Subject: gcc 2.7.2.3 optimizer bug for long long comparisons
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Sender: Richard Kettlewell <richard@sfere.greenend.org.uk>
Package: gcc
Version: 2.7.2.3-7
Here's my test source file:
lyonesse$ cat t.c
#include <limits.h>
void tryit(long long longvalue, int boringvalue) {
if(longvalue < LONG_MIN || longvalue > LONG_MAX)
abort();
}
main() {
tryit(-3, 1);
exit(0);
}
With gcc 2.7.2.3, the optimizer gets it wrong, and so abort() is
called when it shouldn't be:
lyonesse$ gcc -O2 -o t t.c && ./t
Aborted (core dumped)
lyonesse$ gcc -O1 -o t t.c && ./t
Aborted (core dumped)
lyonesse$ gcc -O0 -o t t.c && ./t
lyonesse$ gcc --version
2.7.2.3
egcs however gets it right:
lyonesse$ egcc -O2 -o t t.c && ./t
lyonesse$ egcc -O1 -o t t.c && ./t
lyonesse$ egcc -O0 -o t t.c && ./t
lyonesse$ egcc --version
egcs-2.91.66
If the gcc 2.7 series is dead I suppose this can be fairly safely
ignored. If it's still required for some things (linux kernel
compiles?) then it ought to be fixed however...
ttfn/rjk
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From: Matthias Klose <doko@cs.tu-berlin.de>
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Date: Thu, 12 Apr 2001 23:52:39 +0200 (MEST)
To: 4429-done@bugs.debian.org, 4430-done@bugs.debian.org,
4954-done@bugs.debian.org, 5367-done@bugs.debian.org,
6047-done@bugs.debian.org, 12375-done@bugs.debian.org,
20606-done@bugs.debian.org, 20889-done@bugs.debian.org,
24788-done@bugs.debian.org, 26100-done@bugs.debian.org,
34322-done@bugs.debian.org, 48726-done@bugs.debian.org,
54544-done@bugs.debian.org, 63154-done@bugs.debian.org
Subject: closing gcc272 bugs
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Message-ID: <15062.8940.590633.88211@bolero>
Delivered-To: 63154-done@bugs.debian.org
gcc272 (2.7.2.3-18) unstable; urgency=low
* Close all gcc272 in the Debian bug tracking archive. The use of
gcc272 is deprecated. The only reason it exists is to have a
compiler for the linux kernel 2.0.x.
The bug reports for gcc272 are still available on
http://bugs.debian.org/cgi-bin/pkgreport.cgi?pkg=gcc272&archive=yes
Closes: #4429, #4430, 4954, #5367, #6047, #12375, #20606, #20889,
#24788, #26100, #34322, #48726, #54544, #63154.
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