================
@@ -554,6 +554,22 @@ class VectorType : public Type {
return VectorType::get(VTy->getElementType(), EltCnt * 2);
}
+ /// This static method returns a VectorType with the same size-in-bits as
+ /// SizeTy but with an element type that matches the scalar type of EltTy.
+ static VectorType *getWithSizeAndScalar(VectorType *SizeTy, Type *EltTy) {
----------------
paulwalker-arm wrote:
I really struggled to come up with a name that conveyed enough information
whilst not causing all uses to overflow the 80 char line limit. This attempt
being a shortened version of
`get[VectorType]With[Total]Size[of_the_first_operand]AndScalar[Type_of_the
second_operand]`. I'm not precious over this so suggestions are very welcome.
The downside of passing in a `TypeSize` is that I'd always have to create a new
VectorType, whereas the current implementation has an early exit for the most
common case of "casting" between fixed and scalable vectors of the same element
type.
A lesser reason was it being awkward to convert between ElementCount and
TypeSize and I wanted to avoid introducing another use of `getKnownMinValue()`.
Is this rational strong enough? or would you rather I go the `TypeSize` route?
https://github.com/llvm/llvm-project/pull/130973
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