[PATCH] D132073: [CodeGen] Zero out only modified registers

[Eli Friedman via Phabricator via llvm-commits]

efriedma added a comment.

> we shouldn't be zeroing %rdi

I don't see how it's a problem if we zero rdi.  Even if we don't modify rdi, the caller doesn't have any way of knowing it wasn't modified.  The calling convention says it's caller-save.


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D132073/new/

https://reviews.llvm.org/D132073