[PATCH] D62344: [AArch64] Preserve X8 for thunks ending in variadic musttail calls

[Eli Friedman via Phabricator via llvm-commits]

efriedma accepted this revision.
efriedma added a comment.
This revision is now accepted and ready to land.

The varargs argument list for a function normally can't contain an sret parameter; I guess musttail vararg lists are special.  Maybe worth calling out in the LangRef description of mustttail?  (I guess you could argue that sret is an ABI issue which is inherently target-specific, but it still seems a little surprising.)

Otherwise LGTM


Repository:
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  https://reviews.llvm.org/D62344/new/

https://reviews.llvm.org/D62344