[llvm-dev] PlaceSafepoints, operand bundles, and RewriteStatepointsForGC

[Sanjoy Das via llvm-dev]

On Wed, Jan 27, 2016 at 9:01 AM, Sanjoy Das
<sanjoy at playingwithpointers.com> wrote:
> [+CC llvm-dev this time]
>
> Hi,
>
> As discussed in the review thread in http://reviews.llvm.org/D16439,
> the future plan around statepoints, deopt bundles, PlaceSafepoints
> etc. is to "constant fold" -spp-no-statepoints
> and -rs4gc-use-deopt-bundles to true.
>
> We (Azul) have moved to a representation of safepoint polls, deopt
> state etc. that enables us to do the above; and at this point I'm
> waiting for an okay from you guys.  LLILC should mostly Just Work in
> this new world, with the exception of gc transition operands -- the
> LLILC frontend will have to denote these using "gc-transition" operand
> bundles, and not by eagerly emitting gc.statepoint calls.  You should
> be able to test out your changes by passing in -spp-no-statepoints
> and -rs4gc-use-deopt-bundles to the LLVM build used in LLILC.
>
> Please let me know once you're okay with me making the switch to
> -spp-no-statepoints and -rs4gc-use-deopt-bundles being clamped to
> true.

Update: this is now done.

>
> -- Sanjoy

-- Sanjoy