[PATCH] D110869: [X86] Implement -fzero-call-used-regs option

[Bill Wendling via Phabricator via cfe-commits]

void added inline comments.


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Comment at: clang/include/clang/Basic/AttrDocs.td:6116
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+- ``skip`` doesn't zero any call-used registers.
+- ``used`` only zeros call-used registers used in the function. By ``used``, we
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void wrote:
> nickdesaulniers wrote:
> > Might be worth a note that `skip` is helpful for disabling previously occurring instances of the command line flag.  Sometimes toolchains have wrapper scripts that force on flags, or are built with the implicit default changed, so being able to explicitly disable a feature can be helpful.
> Doesn't that apply to all (or most) flags though? I don't think they mention that you can override previously set flags...
Oh, I see what you mean now. I'll see what I can do.


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D110869/new/

https://reviews.llvm.org/D110869