WIP: Support LLVM 18

[xermicus]

Description

Support LLVM 18.

Related Issue

482

How This Has Been Tested

Option\<Breaking Changes>

Checklist

• [x] Introduce feature flags

• [ ] Wait out

  • [x] next llvm-sys release supporting LLVM 18
  • [ ] LLVM 18 binary releases to run tests on CI

• [x] Guard removed API methods and make test suite pass

• [ ] Implement added functionality

  • [x] Getting and setting tail, musttail, and notail attributes on call instructions
  • [x] Implmented a safe wrapper around LLVMCreateTargetMachineWithOptions
  • [x] New flags: LLVMGetNNeg, LLVMSetNNeg, LLVMGetIsDisjoint, LLVMSetIsDisjoint, LLVMGetFastMathFlags, LLVMSetFastMathFlags, LLVMCanValueUseFastMathFlags
  • [ ] Operand Bundles We don't need this right now, can I leave this open for a future PR?

• [x] I have read the Contributing Guide

[vcfxb]

After a little poke, llvm-sys now has updated to support LLVM 18

[xermicus]

Great, now I'm basically just waiting for an ubuntu build to use on CI

[xermicus]

I'm not sure what's going on with linux x86 binary LLVM releases, however the test suite passes locally for me. @TheDan64 the PR is ready to receive a review :)

[TheDan64]

@xermicus wdym by the binarys? Tests seem to be working. Or was this an intermittent thing?

[TheDan64]

Oh, there's no build check for LLVM 18, could you please add one @xermicus

[xermicus]

@TheDan64 yep I have it on my radar

[Pat-Lafon]

Brew just got LLVM 18, so maybe this has tricked through the ecosystem now?