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Re: clobber

From: Florent Defay <spira dot inhabitant at gmail dot com>
To: Ian Lance Taylor <iant at google dot com>
Cc: gcc-help at gcc dot gnu dot org
Date: Mon, 27 Jul 2009 14:56:40 +0200
Subject: Re: clobber
References: <8502af3c0907240524sbdb7f32q24e94558c3918af3@mail.gmail.com> <m3d47py33g.fsf@google.com>

> For this, I think it should work to use the + constraint to tell gcc
> that the operand is both read and written.

+ is not sufficient. So I told GCC to copy the clobbered operand into
another one and that this new one is set as 0 during the insn.


Thank you.
Regards.

Florent

References:
- clobber
  - From: Florent Defay
- Re: clobber
  - From: Ian Lance Taylor

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