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Re: c/6917: optimization problem in gcc 3.1
- From: reichelt at igpm dot rwth-aachen dot de
- To: gcc-bugs at gcc dot gnu dot org, gcc-prs at gcc dot gnu dot org, nobody at gcc dot gnu dot org, valera dot veryazov at teokem dot lu dot se
- Date: 22 Nov 2002 16:17:31 -0000
- Subject: Re: c/6917: optimization problem in gcc 3.1
- Reply-to: reichelt at igpm dot rwth-aachen dot de, gcc-bugs at gcc dot gnu dot org, gcc-prs at gcc dot gnu dot org, nobody at gcc dot gnu dot org, valera dot veryazov at teokem dot lu dot se, gcc-gnats at gcc dot gnu dot org
Synopsis: optimization problem in gcc 3.1
State-Changed-From-To: open->closed
State-Changed-By: reichelt
State-Changed-When: Fri Nov 22 08:17:30 2002
State-Changed-Why:
Not a bug.
You are not obeying the aliasing rules and thus invoking undefined behaviour.
If you want the compiler not to perform optimizations based on alias-analysis,
you can specify "-fno-strict-aliasing".
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=6917