[llvm] [XRay][X86] Handle conditional calls when lowering patchable tail calls (PR #89364)

[Ricky Zhou via llvm-commits]

rickyz wrote:

Thanks!

> @deanberris may have an idea why xray handles tail calls specially.
fwiw, I suspect xray needs to instrument tail calls specially so that the correct caller/callee is relationship is maintained in traces - if a tail call were modeled as a function exit followed by a function entry call, then a caller and its tail callee would appear to be siblings rather than parent/child in the call trace info.

https://github.com/llvm/llvm-project/pull/89364