[Bug rtl-optimization/34302] [4.3 regression] Invalid code reordering

["richard dot guenther at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #12 from richard dot guenther at gmail dot com  2007-12-10 20:56 -------
Subject: Re:  [4.3 regression] Invalid code reordering

On Dec 10, 2007 9:46 PM, Kenneth Zadeck <zadeck@naturalbridge.com> wrote:
> This patch fixes where the move insn is inserted on pre increments.  it
> had been inserted before the auto inc but this is not correct.  it needs
> to replace the existing add to properly handle the case where the
> operands of the add change between the add and the load.
>
> Tested on ppc-32.  The patch will only effect architectures with pre
> increment.
>
> Ok for commit?

This is ok.

Thanks,
Richard.

> Jakub, note that i changed the name of your testcase from 20071012-1.c
> to 20071210-1.c.
> I believe that this is the correct.
>
> Kenny
>
>
> 2007-12-10  Kenneth Zadeck <zadeck@naturalbridge.com>
>
>     PR rtl-optimization/34302
>     * auto-inc-dec.c (attempt_change): Change place where move is
>     inserted.
>
> 2007-12-10  Jakub Jelinek  <jakub@redhat.com>
>
>     PR rtl-optimization/34302
>     * gcc.c-torture/execute/20071210-1.c: New test.
>
>


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34302