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Re: [rtl, patch] combine concat+shuffle

From: Richard Sandiford <rdsandiford at googlemail dot com>
To: Marc Glisse <marc dot glisse at inria dot fr>
Cc: gcc-patches at gcc dot gnu dot org
Date: Tue, 08 May 2012 13:56:09 +0100
Subject: Re: [rtl, patch] combine concat+shuffle
References: <alpine.DEB.2.02.1205072120220.3230@laptop-mg.saclay.inria.fr> <g4mx5jdna9.fsf@richards-thinkpad.stglab.manchester.uk.ibm.com> <alpine.DEB.2.02.1205081217050.3229@laptop-mg.saclay.inria.fr> <g4bolzdj5r.fsf@richards-thinkpad.stglab.manchester.uk.ibm.com> <alpine.DEB.2.02.1205081402020.3229@laptop-mg.saclay.inria.fr>

Marc Glisse <marc.glisse@inria.fr> writes:
>> Realised afterwards that both versions need to check
>> GET_MODE_NUNITS (mode) == 2, because we're requiring OP0 and OP1
>> to be scalar.  Sorry for not noticing first time.
>
> I thought that was a consequence of
>
> XVECLEN (trueop1, 0) == 2
>
> (in the lines before your first &&)
> ie the result (which has mode "mode") is a vec_select of 2 objects.

Yeah, you're right of course.

Richard

References:
- [rtl, patch] combine concat+shuffle
  - From: Marc Glisse
- Re: [rtl, patch] combine concat+shuffle
  - From: Richard Sandiford
- Re: [rtl, patch] combine concat+shuffle
  - From: Marc Glisse
- Re: [rtl, patch] combine concat+shuffle
  - From: Richard Sandiford
- Re: [rtl, patch] combine concat+shuffle
  - From: Marc Glisse

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