[clang] [HLSL] Preserve matrix layout as AST storage metadata (PR #225519)

[Chris B via cfe-commits]

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@@ -2259,9 +2256,8 @@ Value *ScalarExprEmitter::VisitMatrixSubscriptExpr(MatrixSubscriptExpr *E) {
   Value *Idx;
   unsigned NumCols = MatrixTy->getNumColumns();
   unsigned NumRows = MatrixTy->getNumRows();
-  bool IsMatrixRowMajor =
-      isMatrixRowMajor(CGF.getLangOpts(), E->getBase()->getType());
-  Idx = MB.CreateIndex(RowIdx, ColumnIdx, NumRows, NumCols, IsMatrixRowMajor);
+  Idx = MB.CreateIndex(RowIdx, ColumnIdx, NumRows, NumCols,
+                       /*IsRowMajor=*/false);
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llvm-beanz wrote:

Is there an intentional decision here to not support row major in C/C++?

https://github.com/llvm/llvm-project/pull/225519