================
@@ -2163,6 +2163,51 @@ static void BuildFlattenedTypeList(QualType BaseTy,
}
}
+bool SemaHLSL::IsLineVectorLayoutCompatibleType(clang::QualType QT) {
+ if (QT.isNull())
+ return false;
+
+ llvm::SmallVector<QualType, 16> QTTypes;
+ BuildFlattenedTypeList(QT, QTTypes);
----------------
hekota wrote:
Well, QTTypes is initialized with size 16, and as you say it should be 4 here.
Note that BuildFlattenedTypeList is creating 3 additional SmallVectors
instances for WorkList, FieldTypes and ElementFields (though this last one is
an invalid case for this builtin), and doing additional work making sure the
types are in the right order.
It is certainly simpler to let BuildFlattenedTypeList do its work and then
evaluate the type trait based on the results. And in this case, it might be
fine because the trait will most likely be evaluated just once for each
template instantiation of a buffer class & element type pair.
It is however important to know what is behind helper functions like
`BuildFlattenedTypeList` to make sure it is not an overkill for a given task.
https://github.com/llvm/llvm-project/pull/113730
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