During a backtrace the `.cfi_undefined` for a float register causes an assert in libunwind. Reviewed By: MaskRay Differential Revision: https://reviews.llvm.org/D110144
During a backtrace the `.cfi_undefined` for a float register causes an assert in libunwind. Reviewed By: MaskRay Differential Revision: https://reviews.llvm.org/D110144