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Re: [ARM][PATCH] Vectorizer generates unaligned access when -mno-unaligned-access is enabled
- From: Christophe Lyon <christophe dot lyon at linaro dot org>
- To: Yury Gribov <y dot gribov at samsung dot com>
- Cc: Kugan <kugan dot vivekanandarajah at linaro dot org>, Ramana Radhakrishnan <ramrad01 at arm dot com>, "gcc-patches at gcc dot gnu dot org" <gcc-patches at gcc dot gnu dot org>, Richard Earnshaw <Richard dot Earnshaw at arm dot com>
- Date: Thu, 6 Feb 2014 17:54:59 +0100
- Subject: Re: [ARM][PATCH] Vectorizer generates unaligned access when -mno-unaligned-access is enabled
- Authentication-results: sourceware.org; auth=none
- References: <52EF2C1D dot 7050207 at linaro dot org> <52F10D37 dot 5080402 at arm dot com> <52F2501D dot 6090800 at samsung dot com> <52F25108 dot 50502 at arm dot com> <52F353F1 dot 5020206 at linaro dot org> <52F35ABF dot 1090703 at samsung dot com>
On 6 February 2014 10:49, Yury Gribov <y.gribov@samsung.com> wrote:
> Kugan wrote:
>>> Ok if no regressions.
>>
>> Tested it on qemu for arm-none-linux-gnueabi and there is no new
>> regressions. I am sorry I didn't mention it when I posted the patch.
>
> Commited in r207533. Thanks!
>
Hi,
As can be seen here:
http://cbuild.validation.linaro.org/build/cross-validation/gcc/207533/report-build-info.html
this has caused some regressions on armv5t targets.
Additionally, are you sure testing this kind of thing on QEMU
sufficient? Does it really handle unaligned accesses as bus errors?
Christophe.