[LLVMdev] LLC ARM Backend maintainer

[James Molloy]

Hi,

It goes without saying that I +1 this.

Cheers,

James

-----Original Message-----
From: llvmdev-bounces at cs.uiuc.edu [mailto:llvmdev-bounces at cs.uiuc.edu] On Behalf Of Raja Venkateswaran
Sent: 11 October 2011 17:46
To: llvmdev at cs.uiuc.edu
Subject: Re: [LLVMdev] LLC ARM Backend maintainer




I am very interested in seeing a qualification plan for ARM given that it is
a widely used target with several combinations of options/modes to be
tested. I & my team use ARM hardware for running tests and we run all LLVM
test suite tests as part of qualification process. I had started a similar
conversation in llvm-commits, but this is probably the right forum. It will
save everyone a lot of time if we can all agree on qualification tests and
options for ARM and would be happy to initiate the discussion and process
for this.

--Raja

> ------------------------------
>
> Message: 3
> Date: Mon, 10 Oct 2011 17:13:49 -0700
> From: Tanya Lattner <lattner at apple.com>
> Subject: Re: [LLVMdev] LLC ARM Backend maintainer
> To: Jim Grosbach <grosbach at apple.com>
> Cc: "llvmdev at cs.uiuc.edu" <llvmdev at cs.uiuc.edu>
> Message-ID: <A8FD895A-6307-402D-A38D-A3BF39FF43C6 at apple.com>
> Content-Type: text/plain; CHARSET=US-ASCII
>
> Exactly as Jim said :)
>
> I'm only talking about releases and release blockers. Its also a bit of a
> grey area when you are talking about just ARM codgen tests in the
> regression test suite because those should always be passing regardless
> of what target/os you are testing on (assuming you built the arm backend
> which the release team typically does). As it stands now we don't have
> ARM as a supported target just because there is no qualification plan for
> it (ie. no one running the test suite or some other benchmarks on an ARM
> device for example) and no real support to qualify it. If someone wants
> to initiate this process, it can be talked about post-3.0.
>
> -Tanya
>
> On Oct 10, 2011, at 8:47 AM, Jim Grosbach wrote:
>
> > No. Note the qualifying phrase "for releases" on Tanya's statement. If,
> during release testing, a regression is found on ARM compared to 2.9
> results, it is not required by process to be considered a release
> blocker. That does not mean features can or should be enabled which
> knowingly break ARM. That's an entirely different situation.
> >
> > -Jim
> >
> >
> > On Oct 8, 2011, at 9:59 AM, Rotem, Nadav wrote:
> >
> >> Hi Tanya,
> >>
> >> The new type-legalization mode (-promote-elements) which enables
> vector-select in LLVM (and a nice perf boost for several workloads), is
> currently disabled because of a _single_ bug in the ARM codegen which
> makes a few tests fail.  If ARM is not a supported target, can I mark
> these tests as 'XFAIL' and enable vector-select support in LLVM ?
> >>
> >> Thanks,
> >> Nadav
> >>
> >>
> >> -----Original Message-----
> >> From: llvmdev-bounces at cs.uiuc.edu [mailto:llvmdev-bounces at cs.uiuc.edu]
> On Behalf Of Tanya Lattner
> >> Sent: Saturday, October 08, 2011 01:10
> >> To: Seb
> >> Cc: llvmdev at cs.uiuc.edu
> >> Subject: Re: [LLVMdev] LLC ARM Backend maintainer
> >>
> >>
> >> On Oct 7, 2011, at 1:07 AM, Seb wrote:
> >>
> >>> Hi all,
> >>>
> >>> To answer Eli question, I wanted to know who is actively working on
> ARM because I submitted some bug report (#11029, #9905) and don't know if
> someone is working on them, if/when the will be fixed. Maybe I just need
> to better understand LLVM release process, I've seen a mail in this list
> about it.
> >>
> >> Bugs get fixed if there are people to fix them. There are numerous
> people working on ARM and patches are also accepted.
> >>
> >> ARM is not currently a target that we support for releases. So those
> bugs are not release blockers.
> >>
> >> -Tanya
> >>
> >>>
> >>> -- Seb
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