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Re: Asm volatile causing performance regressions on ARM
- From: Eric Botcazou <ebotcazou at adacore dot com>
- To: Richard Biener <richard dot guenther at gmail dot com>
- Cc: gcc at gcc dot gnu dot org, Pavel Fedin <p dot fedin at samsung dot com>
- Date: Fri, 28 Feb 2014 10:23:19 +0100
- Subject: Re: Asm volatile causing performance regressions on ARM
- Authentication-results: sourceware.org; auth=none
- References: <02f001cf3447$b7cb7380$27625a80$%garbuzov at samsung dot com> <3633543 dot TNsZsBs1fu at polaris> <CAFiYyc1H+coFv8D9xjqEbX5kQ6bZoPZEnm_SbCdpMzpyY3mRtQ at mail dot gmail dot com>
> Of course if the GIMPLE level doesn't care about the barrier then it doesn't
> make sense to be overly conservative at the RTL CSE level. Thus I think we
> can just remove this barrier completely.
Not clear to me, what happens e.g. for register variables?
--
Eric Botcazou