llvm dev - Jan 2016 - Diff to add ARMv6L to Target parser

>> However, because the DefaultTargetTriple is
armv6l-unknown-linux-gnueabihf,
>> and llvm didn’t know about v6l, it would fail to match and canonicalize
to armv6.
>>  I added the notion of v6l to llvm to address this.
>
> ARMv6l was definitely there once. I'm not sure what happened.
>
> I'm copying the ARM folks that did most of the recent changes in hope
they can
> shed some light.
Going back through SVN history, I cannot find any evidence that ARMv6L ever
existed.

There used to be ARMv6HL, until r252903 changed it from an architecture variant
into an alias for ARMv6K; i.e. ARMv6HL can still be used in a target triple.

For a reference,
http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Support/TargetParser.cpp?revision=238651
is the last version of TargetParser before any of our changes, i.e. authored
purely by Renato.
One can see it has v6HL but not v6L.

On 4 January 2016 at 14:16, Artyom Skrobov <Artyom.Skrobov at arm.com>
wrote:
> Going back through SVN history, I cannot find any evidence that ARMv6L ever
existed.
Oh, my bad!! I was thinking of ARMv7l... :/

New year's first brain fart. Sorry about that.

Nevertheless, I'll leave you guys to review this one, as I lost touch
with the parser a while ago.

cheers,
--renato

>> Going back through SVN history, I cannot find any evidence that ARMv6L
ever existed.
>
> Oh, my bad!! I was thinking of ARMv7l... :/
> 
> Nevertheless, I'll leave you guys to review this one, as I lost touch
with the parser a while ago.
Ah, I see: ARMv7L is now an alias for ARMv7A.

So, if William has to add support for ARMv6L, I'd suggest he adds it as an
alias, and not as an architecture variant.

>>> However, because the DefaultTargetTriple is
armv6l-unknown-linux-gnueabihf
Where is this "armv6l" coming from? Is it a legacy GNU thing? Or is it
a newly-coined name?