Wasm: druntime with full GC

[H. S. Teoh]

On Wed, Feb 07, 2024 at 08:55:16PM +0000, Sebastiaan Koppe via Digitalmars-d wrote:
> On Wednesday, 7 February 2024 at 03:52:15 UTC, H. S. Teoh wrote:
> > So I've been working on my minimal druntime for wasm, and discovered
> > that LLVM actually uses a shadow stack for wasm, not the native
> > non-addressable wasm stack.
> 
> It does for debug, but then the optimisations push a lot of that to
> the wasm stack, see mem2reg step in llvm.
> 
> A possibility is to run the spill-pointers pass of binaryen, that
> should hoist the pointers back out to the shadow stack. With some perf
> hit of course.

Unfortunately, looks like my distro's version of binaryen doesn't
support --spill-pointers.


T

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