[LLVMdev] Stack maps no longer experimental in 3.5

Sean Silva
Sat, 07 Jun 2014 18:39:24 -0000

On Sat, Jun 7, 2014 at 9:35 AM, Filip Pizlo <fpizlo at apple.com> wrote:

> That would work. :-)
>
> What about exposing C API a function to query for the presence of an
> intrinsic?
>

I don't know almost anything about how the C API works, but is it possible
to do something like `getHandleToIntrinsic(Module,
"llvm.experimental.patchpoint") == nullptr`? (I doubt that the
function is
actually called "getHandleToIntrinsic", but you get the idea)

-- Sean Silva


>
> -Fil
>
> > On Jun 7, 2014, at 3:37 AM, Rafael Espíndola <rafael.espindola at
gmail.com>
> wrote:
> >
> >> On 7 June 2014 00:14, Filip Pizlo <fpizlo at apple.com>
wrote:
> >> The only setback is to ensure that we synchronize the renaming
with
> WebKit.
> >>
> >> The WebKit->LLVM interface currently avoids revision-lock; you
can take
> any
> >> recent revision of either and build a working browser engine. This
is
> mostly
> >> true even when we change the stack map format because of
versioning in
> the
> >> format. I'd rather keep it that way.
> >>
> >> Is there a way to do this with intrinsics?  I.e. is there a safe
way for
> >> WebKit to query whether "llvm.patchpoint" is an
available intrinsic, and
> >> then fallback to "llvm.experimental.patchpoint" if
it's not available?
> >
> > Keeping both names during a smallish time window should be sufficient,
> no?
> >
> > Cheers,
> > Rafael
>
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