[clang] [HLSL] Vector standard conversions (PR #71098)

[Justin Bogner via cfe-commits]

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@@ -6432,7 +6432,7 @@ void InitializationSequence::InitializeFrom(Sema &S,
   // For HLSL ext vector types we allow list initialization behavior for C++
   // constructor syntax. This is accomplished by converting initialization
   // arguments an InitListExpr late.
-  if (S.getLangOpts().HLSL && DestType->isExtVectorType() &&
+  if (S.getLangOpts().HLSL && Args.size() > 1 && DestType->isExtVectorType() &&
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bogner wrote:

This sort of looks like a separate bug fix. In any case I don't see a test for it (though maybe I missed it)

https://github.com/llvm/llvm-project/pull/71098