highway @1.2.0: Compiler crash with Apple Clang >= 16 and LLVM Clang >= 16

[thelastlin (Xavier Hsinyuan)]

Reproduce steps:

1. Install Xcode 16.0 beta 3 (16A5202i) from Apple;
2. Install port clang-16, clang-17, clang-18;
3. Run port build highway, and got Crash Report from clang.
4. Change compiler, rebuild highway, crash again.

Workaround:

1. Use port clang-15, or
2. Disable dynamic dispatch (​upstream PR) entirely or just for clang-16 and later before Apple (or LLVM) fixes the ICE.

[jmroot (Joshua Root)]

Replying to thelastlin:

2. Install port clang-16, clang-17, clang-18;

From binaries, or build from source with the beta toolchain?

[thelastlin (Xavier Hsinyuan)]

Replying to jmroot:

From binaries, or build from source with the beta toolchain?

Build from source with the beta toolchain.

Notice that this issue can be reproduced on clang-17(amd64) from ​LLVM's Debian/Ubuntu Packages Repo, with preprocessed source and associated run script generated by crash reproducer.

[i0ntempest]

There's a patch here: ​https://github.com/google/highway/issues/2317 that disables SVE compilation and fixes this. SVE isn't supported on ASi for now anyways.

Maybe we can take that patch before they have a new version?

[ryandesign (Ryan Carsten Schmidt)]

Has duplicate #70777.

[jmroot (Joshua Root)]

Replying to i0ntempest:

Maybe we can take that patch before they have a new version?

I was hoping for at least a reviewed and CI-tested PR upstream so there would be a little more assurance that the change is correct, but there's been nothing so far. I guess we can try the patch on spec.

[jmroot (Joshua Root)]

The PR linked from the ticket description was already merged and is in 1.2.0, BTW.

[jmroot (Joshua Root)]

In 9c921e4504b3c6b9c357828e8c739789edaf27a7/macports-ports (master):

highway: disable SVE to avoid ICE

Closes: #70345

[ryandesign (Ryan Carsten Schmidt)]

Has duplicate #70879.