musl - Re: [gentoo-musl] Re: Add support for musl-libc on Linux

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Date: Wed, 22 Jun 2016 09:55:25 +0100
From: Peter Smith <peter.smith@...aro.org>
To: Lei Zhang <zhanglei.april@...il.com>
Cc: Rafael Espíndola <rafael.espindola@...il.com>, 
	llvm-commits <llvm-commits@...ts.llvm.org>, musl@...ts.openwall.com, 
	gentoo-musl@...ts.gentoo.org, cfe-commits cfe <cfe-commits@...ts.llvm.org>
Subject: Re: [gentoo-musl] Re: Add support for musl-libc on Linux

Hello Lei,

Thanks for all the updates. That looks good to me from an ARM perspective.

Peter

On 22 June 2016 at 09:03, Lei Zhang <zhanglei.april@...il.com> wrote:
> 2016-06-21 23:07 GMT+08:00 Peter Smith <peter.smith@...aro.org>:
>> Hello Lei,
>>
>> The changes to llvm and clang look ok to me. I've got some suggestions
>> for testing.
>>
>> For the clang patch, it looks like there isn't a test to check that
>> musleabihf implies hard floating point. It looks like
>> Driver/arm-mfpu.c CHECK-HF might be a good candidate to add a test.
>>
>> For the llvm patch
>>
>> I think you should be able to find a test that checks the behaviour of
>> GNUEABI and GNUEABIHF for each of the properties that you've added
>> Subtarget->isTargetMuslAEABI() to or equivalent. It would be useful to
>> add a test case for MUSLEABI and/or MUSLEABIHF. For example in the
>> RTLIB case there are a large number of tests that check whether the
>> correct __aeabi_ function is called.
>>
>> Some files I came across (there are many more) that might be a good
>> place to check that musleabi and musleabihf behaves like gnueabi and
>> gnueabihf:
>> CodeGen/ARM/memfunc.ll
>> CodeGen/Thumb2/float-ops.ll
>> CodeGen/ARM/divmod-eabi.ll
>> CodeGen/ARM/fp16.ll (hard-float for HF)
>> MC/ARM/eh-directives-personalityindex.s
>
> Thanks for the pointers! Please see the refined (again) patches.
>
> As a side note, there's no "gnueabi" in float-ops.ll or
> eh-directive-personalityindex.s, so I skipped them. In addition, I
> found a few other relevant test files to patch thanks to your advice.
>
>
> Lei

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