test: Enable some working vector tests

[Danielkonge]

As mentioned in #24131, these tests seem to be working fine, so we can enable them again unless I am missing something.

[andrewrk]

Thanks!

I think you missed one:

andy@bark ~/d/zig (master)> g 20680 test/
test/behavior/vector.zig:        // https://github.com/ziglang/zig/issues/20680
andy@bark ~/d/zig (master)> g 12827 test/
test/behavior/abs.zig:    // https://github.com/ziglang/zig/issues/12827
test/behavior/vector.zig:        // LLVM 15 regression: https://github.com/ziglang/zig/issues/12827

Also don't forget to put "closes #xxxx" in the commit message

[Danielkonge]

Hmm, CI still gives the error

error: Assertion failed: (llvm::all_of(SrcOps, [&, this](const SrcOp &Op) { return (Op.getLLTTy(*getMRI()).isVector() && Op.getLLTTy(*getMRI()) == SrcOps[0].getLLTTy(*getMRI())); }) && "type mismatch in input list"), function buildInstr, file MachineIRBuilder.cpp, line 1437.

which seems to be the problem in #20680, but I cannot reproduce it locally. (Even with the -ODebug flag.)

I will try to see if I can just get the fix to #12827 through CI, and then I will update the PR. Otherwise I will close it for now (and try to figure out why everything works on my M1 mac locally).

[andrewrk]

which seems to be the problem in #20680, but I cannot reproduce it locally. (Even with the -ODebug flag.)

Likely you are using LLVM without assertions enabled.

[Danielkonge]

I updated the PR with a commit message saying it closes #12827. Since my previous run got through CI on x86 macOS, I hope it is true that #12827 is fixed at least. (Also that test didn't seem to be an LLVM assertion failure if I read the error correctly.)