Alex Crichton (Jun 25 2024 at 21:16): Alex Crichton (Jun 25 2024 at 21:16):I stumbled across https://github.com/tkaitchuck/aHash/issues/222 today and using Afonso's freshly-added support to the compiler explorer whipped up https://godbolt.org/z/j6YEv81MM to show how cranelift's doing quite a good job relative native by eating through all the swap_bytes expansions that llvm inserts
Alex Crichton (Jun 25 2024 at 21:16):just figured it was neat and wanted to share
Afonso Bordado (Jun 25 2024 at 21:18):Super neat being able to see all of this in a single screen!
fitzgen (he/him) (Jun 25 2024 at 21:24):nice :)
Till Schneidereit (Sep 08 2024 at 13:35):I completely randomly stumbled upon this just now, and then additionally stumbled upon the fact that the Wasmtime output is pretty different with Wasmtime 22—the latest version available on Godbolt: https://godbolt.org/z/3W8j8MG9n
It looks like maybe that's just a matter of more details being printed? I have no idea where the wasm_to_array_trampoline comes from, though
Afonso Bordado (Sep 08 2024 at 15:26):I have no idea where the
wasm_to_array_trampolinecomes from, though
Oh, when we compile wasm in godbolt we compile it into a binary and then dissasemble it. We then filter out some of the trampoline functions that wasmtime includes in the binary, that must be broken somehow.
Till Schneidereit (Sep 09 2024 at 12:15):ah, that makes sense—thank you!
Last updated: Dec 23 2024 at 12:05 UTC