[llvm] [SystemZ][XRay] Implement XRay instrumentation for SystemZ (PR #113253)

[Ulrich Weigand via llvm-commits]

uweigand wrote:

> @uweigand Just to make sure:
> 
> ```
>   bool HasVectorFeature =
>       TM.getMCSubtargetInfo()->hasFeature(SystemZ::FeatureVector);
> ```
> 
> is the correct way to determine if the user compiles with the vector extension enabled, isn't it?

Yes, this should be correct.  I'm now wondering whether this handles -msoft-float correctly - for the main Subtarget, we disable the vector feature if soft-float is used, but I'm not sure if that also happens for the MCSubtarget.  Might be interesting to verify.


https://github.com/llvm/llvm-project/pull/113253