[clang] [HLSL] Implement HLSL splatting (PR #118992)

[Sarah Spall via cfe-commits]

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@@ -2527,7 +2527,7 @@ QualType Sema::BuildMatrixType(QualType ElementTy, Expr *NumRows, Expr *NumCols,
 }
 
 bool Sema::CheckFunctionReturnType(QualType T, SourceLocation Loc) {
-  if (T->isArrayType() || T->isFunctionType()) {
+  if ((!getLangOpts().HLSL && T->isArrayType()) || T->isFunctionType()) {
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spall wrote:

Ooops! 

https://github.com/llvm/llvm-project/pull/118992