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Re: Dead code elimination problem?
- To: Peter Nenzén <di7petn at cse dot kau dot se>
- Subject: Re: Dead code elimination problem?
- From: Richard Henderson <rth at cygnus dot com>
- Date: Wed, 10 May 2000 10:50:03 -0700
- Cc: gcc-patches at gcc dot gnu dot org
- References: <3.0.5.32.20000510084622.008f8bc0@mail.cse.kau.se>
On Wed, May 10, 2000 at 08:46:22AM +0200, Peter Nenzén wrote:
> We have some problems with the code below. During compilation, gcc seams to
> eliminate the rows after the return statement in each function.
Yes. The code is dead. Your code is illegal.
Quoting from the manual:
] You may not use this mechanism to jump to code in a different
] function. If you do that, totally unpredictable things will happen.
] The best way to avoid this is to store the label address only in
] automatic variables and never pass it as an argument.
r~