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target/9496: bug in optimizer for linux-mips?

From: agx at sigxcpu dot org
To: gcc-gnats at gcc dot gnu dot org
Date: 29 Jan 2003 10:13:10 -0000
Subject: target/9496: bug in optimizer for linux-mips?
Reply-to: agx at sigxcpu dot org
>Number:         9496
>Category:       target
>Synopsis:       bug in optimizer for linux-mips?
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Jan 29 10:16:01 UTC 2003
>Closed-Date:
>Last-Modified:
>Originator:     Guido Guenther
>Release:        gcc version 3.3 20030127 (prerelease)
>Organization:
>Environment:

>Description:
Attached testcase fails with -O2 and -Os. Parts of the source string "one" get overwritten (see 
"abcdefghr should be abcdefgh" output of the testcase. Works without problems when compiled with -O0. Testcase is stripped down from glibc's string/tester.c.

gcc -v
Reading specs from /usr/local/lib/gcc-lib/mips-unknown-linux-gnu/3.3/specs
Configured with: ../gcc-3.3/configure --enable-shared --enable-languages=c
Thread model: posix
gcc version 3.3 20030127 (prerelease)

uname -a
Linux foo 2.4.19-r4k-ip22 #1 Wed Dec 4 10:08:08 CET 2002 mips unknown unknown GNU/Linux
(big endian)

Same problem happens with Debian's gcc version 3.2.1., whereas Debian's gcc 2.95.4 0011002 (Debian prerelease) works fine. Please let me know if I can provide any
further input.
>How-To-Repeat:
gcc -O2 tester-O2.i
./a.out
>Fix:
unknown
>Release-Note:
>Audit-Trail:
>Unformatted:
----gnatsweb-attachment----
Content-Type: application/octet-stream; name="tester-O2.i"
Content-Transfer-Encoding: base64
Content-Disposition: attachment; filename="tester-O2.i"

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