[llvm] [VFABI] Create FunctionType for vector functions (PR #75058)

[Maciej Gabka via llvm-commits]

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@@ -195,6 +195,11 @@ static constexpr char const *MappingsAttrName = "vector-function-abi-variant";
 /// the presence of the attribute (see InjectTLIMappings).
 void getVectorVariantNames(const CallInst &CI,
                            SmallVectorImpl<std::string> &VariantMappings);
+
+/// Constructs a FunctionType by applying vector function information to the
+/// type of a matching scalar function.
+FunctionType *createFunctionType(const VFInfo &Info,
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mgabka wrote:

nit: since this is going to be publicly available interface, I think it is worth to use doxygen style to document the parmeters.

https://github.com/llvm/llvm-project/pull/75058