================
@@ -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) {
+ if (SizeTy->getScalarType() == EltTy->getScalarType())
+ return SizeTy;
+
+ unsigned EltSize = EltTy->getScalarSizeInBits();
+ if (!SizeTy->getPrimitiveSizeInBits().isKnownMultipleOf(EltSize))
----------------
paulwalker-arm wrote:
Are you sure? The intent of this function is to create a VectorType that can be
bitcasted, typically from/to `SizeTy`. When looking at
`CastInst::castIsValid()` I can see it uses `getPrimitiveSizeInBits()` to
determine validity.
To put another way, the check is ensuring the IR is consistent, essentially
protecting against the case where the ElementCount calculation would be
invalid. So I don't think this function cares about data layout?
https://github.com/llvm/llvm-project/pull/130973
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