[PATCH] D40894: [XRay][compiler-rt+llvm] Update XRay trampoline CFI and register stashing semantics

[Dean Michael Berris via Phabricator via llvm-commits]

dberris added reviewers: eizan, kpw.
dberris added a comment.

This is now ready for a look @dblaikie -- or if you know someone else who might know more about the lowering magic involved in SelectionDAG for X86 in particular, a redirect would be most appreciated too.


https://reviews.llvm.org/D40894