translate-c test regression of array alignment after LLVM 14 upgrade

[andrewrk]

No idea why this is happening. Observed to happen on the FreeBSD CI and AArch64 Drone CI, after the LLVM 14 upgrade.

========= Expected to find: ===================
pub extern var my_array: [16]u8 align(128);
pub export fn my_fn() align(128) void {}
pub export fn other_fn() void {
    var ARR: [16]u8 align(16) = undefined;
    _ = ARR;
}
========= But file does not contain it: =======
pub extern var my_array: [16]u8;
pub export fn my_fn() align(128) void {}
pub export fn other_fn() void {
    var ARR: [16]u8 = undefined;
    _ = ARR;
}

Happens with stage1; have not confirmed whether it happens with stage2 or stage3 yet (could make a difference due to LLVM IR C ABI lowerings)

[ehaas]

This does not happen on MacOS when using translate-c with -target aarch64-linux-musl (or with a freebsd target). So it seems to be something specifically about running on those platforms (I'd be curious if it fails with -target x86_64-macos-none when running on FreeBSD or aarch64-linux-musl). From a quick glance at the code I don't see why FunctionDecl's would work but VarDecl's wouldn't.

[andrewrk]

I can reproduce this with a zig-bootstrap build of x86_64-linux-musl - even the host build. Perhaps the next thing to check would be if the problem happens with a debug build.