[LLVMdev] LLVM JIT

[David Blaikie]

[+Lang, weilder of the +1 cattle prod of JIT taming]

1) Not sure - I haven't heard of any. (the usual "patches welcome" but I'm
not sure what is missing on ARM so I couldn't really tell you where to
start (testing it's probably the first step in any case))

2) Possible, but I think for now that's been considered to be outside the
purview of the JIT APIs themselves (even the new/fancy Orc JIT) - in part
because LLVM's JIT is a bit too heavyweight to make a good first-line JIT
for many use cases, so people usually have to build that sort of
infrastructure into layers that don't even reach LLVM's JIT (eg: a
first-pass splatting-style 'JIT' that is fast to run but produces the most
abysmal code but without the overhead of building LLVM IR, etc). I don't
doubt that eventually building some layers into the composable Orc JIT for
handling this sort of thing might be entirely likely.

On Wed, Apr 1, 2015 at 12:27 AM, Закиров Марат <marat61 at gmail.com> wrote:

> Hi folks!
>
> I am currently involved in project which uses LLVM JIT and I have a couple
> of questions for you:
>
> 1) According to http://llvm.org/Features.html LLVM JIT supports only X86
> and PowerPC, but LLVM code generator supports ARM too. Are there any plans
> for JIT to make support also for ARM backend?
> 2) Could LLVM JIT collect some hot traces from overall code and execute it
> separately (after making aggressive optimizations on it) from the cold code
> with higher performance?
>
> --
>
> *Regards, Marat.*
> *С уважением Марат.*
>
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