[clang] [HLSL] Add matrix support to atan2 (PR #194984)

[Farzon Lotfi via cfe-commits]

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@@ -3232,14 +3232,16 @@ static bool CheckFloatRepresentation(Sema *S, SourceLocation Loc,
 static bool CheckFloatOrHalfRepresentation(Sema *S, SourceLocation Loc,
                                            int ArgOrdinal,
                                            clang::QualType PassedType) {
-  clang::QualType BaseType =
-      PassedType->isVectorType()
-          ? PassedType->castAs<clang::VectorType>()->getElementType()
-          : PassedType;
+  clang::QualType BaseType = PassedType;
+  if (PassedType->isVectorType())
+    BaseType = PassedType->castAs<clang::VectorType>()->getElementType();
+  else if (PassedType->isMatrixType())
+    BaseType = PassedType->castAs<clang::MatrixType>()->getElementType();
+
   if (!BaseType->isHalfType() && !BaseType->isFloat32Type())
     return S->Diag(Loc, diag::err_builtin_invalid_arg_type)
-           << ArgOrdinal << /* scalar or vector of */ 5 << /* no int */ 0
-           << /* half or float */ 2 << PassedType;
+           << ArgOrdinal << /* scalar, vector or matrix of */ 5
+           << /* no int */ 0 << /* half or float */ 2 << PassedType;
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farzonl wrote:

You made a sema change but I don't see any sema tests.

https://github.com/llvm/llvm-project/pull/194984