[llvm] [LLVM][IR] Support target extension types in vectors (PR #140630)

[Nikita Popov via llvm-commits]

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@@ -790,8 +790,13 @@ VectorType *VectorType::get(Type *ElementType, ElementCount EC) {
 }
 
 bool VectorType::isValidElementType(Type *ElemTy) {
-  return ElemTy->isIntegerTy() || ElemTy->isFloatingPointTy() ||
-         ElemTy->isPointerTy() || ElemTy->getTypeID() == TypedPointerTyID;
+  if (ElemTy->isIntegerTy() || ElemTy->isFloatingPointTy() ||
+      ElemTy->isPointerTy() || ElemTy->getTypeID() == TypedPointerTyID)
+    return true;
+  if (auto *TTy = dyn_cast<TargetExtType>(ElemTy))
+    return TTy->hasProperty(TargetExtType::CanBeVectorElement) &&
+           TTy->isSized();
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nikic wrote:

Rather than checking isSized() here, we should assert that CanBeVectorElement is only set on sized types.

https://github.com/llvm/llvm-project/pull/140630