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optimization/769: loop index at for loop exit is wrong
- To: gcc-gnats at gcc dot gnu dot org
- Subject: optimization/769: loop index at for loop exit is wrong
- From: eric dot pouech at wanadoo dot fr
- Date: 10 Nov 2000 20:17:26 -0000
- Reply-To: eric dot pouech at wanadoo dot fr
>Number: 769
>Category: optimization
>Synopsis: loop index at for loop exit is wrong
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: unassigned
>State: open
>Class: wrong-code
>Submitter-Id: net
>Arrival-Date: Fri Nov 10 12:26:00 PST 2000
>Closed-Date:
>Last-Modified:
>Originator: Eric Pouech
>Release: gcc version 2.95.1 19990816 (release)
>Organization:
>Environment:
Linux erato 2.2.9-27mdk #1 Mon Jun 14 16:44:05 CEST 1999 i686 unknown
running Mandrake
>Description:
the generated code is not correct
the content of array L should be {1,2,3,4}
after the instructions, but it's {1,2,2,4}
This appears only when -O2 (and above) is used.
However using -O2 -fno-strength-reduce does produce a correct output.
>How-To-Repeat:
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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