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Re: [PATCH][ARM] Disable store_minmaxsi pattern for arm_restrict_i

From: Kyrill Tkachov <kyrylo dot tkachov at arm dot com>
To: GCC Patches <gcc-patches at gcc dot gnu dot org>
Cc: Ramana Radhakrishnan <Ramana dot Radhakrishnan at arm dot com>, Richard Earnshaw <Richard dot Earnshaw at arm dot com>
Date: Wed, 01 Oct 2014 10:42:04 +0100
Subject: Re: [PATCH][ARM] Disable store_minmaxsi pattern for arm_restrict_i
Authentication-results: sourceware.org; auth=none
References: <5405E38A dot 4000504 at arm dot com>

Ping.
https://gcc.gnu.org/ml/gcc-patches/2014-09/msg00154.html

Thanks,
Kyrill

On 02/09/14 16:34, Kyrill Tkachov wrote:

Hi all,

The store_minmaxsi produces a cmp + ite + 2 conditional stores and is
thus inappropriate when the ARMv8-A IT block rules are in place.
Previously we had disabled it for speed optimisations, but it should be
disabled completely when -mrestrict-it is in effect.

Ok for trunk and 4.9?

Tested arm-none-eabi.

2014-09-02  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>

      * config/arm/arm.md (*store_minmaxsi): Disable for arm_restrict_it.

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