[PATCH] D80163: [X86][VARARG] Avoid spilling xmm registers for va_start.

[Eli Friedman via Phabricator via llvm-commits]

efriedma added a comment.

@RKSimon The general approach of using a pseudo to hide the control flow until after register allocation seems fine.  I'm not going to try to review the exact instruction sequences.


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D80163/new/

https://reviews.llvm.org/D80163