[PATCH] D139701: [Clang] Emit "min-legal-vector-width" attribute for X86 only

[Phoebe Wang via Phabricator via cfe-commits]

pengfei added inline comments.


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Comment at: llvm/docs/LangRef.rst:2235-2241
-``"min-legal-vector-width"="<size>"``
-    This attribute indicates the minimum legal vector width required by the
-    calling convension. It is the maximum width of vector arguments and
-    returnings in the function and functions called by this function. Because
-    all the vectors are supposed to be legal type for compatibility.
-    Backends are free to ignore the attribute if they don't need to support
-    different maximum legal vector types or such information can be inferred by
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arsenm wrote:
> This still should be documented somewhere. I don't know if we document any target attributes specifically in the langref
Added in D139784, PTAL.


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  https://reviews.llvm.org/D139701/new/

https://reviews.llvm.org/D139701