[PATCH] D69372: [X86][VARARG] Avoid spilling xmm vararg arguments.

[Eli Friedman via Phabricator via llvm-commits]

efriedma added a comment.

Is it possible to avoid expanding VARARG_THUNK_SAVE_XMM_REGS until after register allocation?  I would rather not make the liveness rules more complicated just for the sake of working around a limitation of fast regalloc.


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  https://reviews.llvm.org/D69372/new/

https://reviews.llvm.org/D69372