[llvm] [Scalarizer][DirectX] support structs return types (PR #111569)

[Farzon Lotfi via llvm-commits]

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@@ -699,6 +730,22 @@ bool ScalarizerVisitor::splitCall(CallInst &CI) {
   if (isVectorIntrinsicWithOverloadTypeAtArg(ID, -1))
     Tys.push_back(VS->SplitTy);
 
+  if (AreAllMatchingVectors) {
+    Type *PrevType = CallType->getContainedType(0);
+    for (unsigned I = 1; I < CallType->getNumContainedTypes(); I++) {
+      Type *CurrType = cast<FixedVectorType>(CallType->getContainedType(I));
+      if (PrevType != CurrType) {
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farzonl wrote:

I would prefer to be more conservative. For one I don't think its necessary to relax this because any different component types should have been determined on the vectorized form of the intrinsic. Second, we don't need anything but an exact component match for our use case so why increase our test burden when it isn't necessary?

https://github.com/llvm/llvm-project/pull/111569