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Re: combiner fix, PR45966
- From: "H.J. Lu" <hjl dot tools at gmail dot com>
- To: Bernd Schmidt <bernds at codesourcery dot com>
- Cc: GCC Patches <gcc-patches at gcc dot gnu dot org>, marcus dot shawcroft at arm dot com
- Date: Sun, 31 Oct 2010 08:17:04 -0700
- Subject: Re: combiner fix, PR45966
- References: <4CB36977.7000401@codesourcery.com>
On Mon, Oct 11, 2010 at 12:45 PM, Bernd Schmidt <bernds@codesourcery.com> wrote:
> The combine-4 patch caused PR45966. ?We have a 4->2 combination, and i0
> feeds i1 which feeds i2. ?When substituting, we only check i0_feeds_i2
> and i1_feeds_i2; we also need to check the i0_feeds_i1/i1_feeds_i2 chain
> and substitute accordingly.
>
> Bootstrapped and regression tested on i686-linux; ok?
>
This caused:
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46248
--
H.J.