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Re: [PATCH] simplify-rtx: Transform (xor (and (xor A B) C) B) with C const

From: Bernd Schmidt <bschmidt at redhat dot com>
To: Segher Boessenkool <segher at kernel dot crashing dot org>
Cc: gcc-patches at gcc dot gnu dot org, ebotcazou at adacore dot com
Date: Thu, 10 Nov 2016 01:00:32 +0100
Subject: Re: [PATCH] simplify-rtx: Transform (xor (and (xor A B) C) B) with C const
Authentication-results: sourceware.org; auth=none
References: <698378c52a694b83b88313d591be654c1880b194.1478725732.git.segher@kernel.crashing.org> <0073e51a-ba60-6d1d-7b19-e45afde7ebc0@redhat.com> <20161109215857.GA31974@gate.crashing.org>

On 11/09/2016 10:58 PM, Segher Boessenkool wrote:

I'll do a PowerPC-specific testcase for all rl[wd]* next week.  rl[wd]imi
will show this xor-xor thing (half of all possible insns were not optimised
before this patch).  Is that enough?

Sure. Once David's rtl testing work is ready we'll want to start doingselftests for these kinds of things.



Bernd

References:
- [PATCH] simplify-rtx: Transform (xor (and (xor A B) C) B) with C const
  - From: Segher Boessenkool
- Re: [PATCH] simplify-rtx: Transform (xor (and (xor A B) C) B) with C const
  - From: Bernd Schmidt
- Re: [PATCH] simplify-rtx: Transform (xor (and (xor A B) C) B) with C const
  - From: Segher Boessenkool

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