[clang] [HLSL][Matrix] introduce MatrixElementExpr as accessor and swizzle operator (PR #171225)

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git-clang-format --diff origin/main HEAD --extensions cpp,h -- clang/include/clang/AST/ComputeDependence.h clang/include/clang/AST/Expr.h clang/include/clang/AST/RecursiveASTVisitor.h clang/include/clang/AST/TextNodeDumper.h clang/include/clang/Sema/SemaHLSL.h clang/include/clang/Serialization/ASTBitCodes.h clang/lib/AST/ComputeDependence.cpp clang/lib/AST/Expr.cpp clang/lib/AST/ExprClassification.cpp clang/lib/AST/ExprConstant.cpp clang/lib/AST/ItaniumMangle.cpp clang/lib/AST/StmtPrinter.cpp clang/lib/AST/StmtProfile.cpp clang/lib/AST/TextNodeDumper.cpp clang/lib/CIR/CodeGen/CIRGenExpr.cpp clang/lib/CIR/CodeGen/CIRGenExprScalar.cpp clang/lib/CIR/CodeGen/CIRGenFunction.cpp clang/lib/CIR/CodeGen/CIRGenFunction.h clang/lib/CodeGen/CGExpr.cpp clang/lib/CodeGen/CGExprScalar.cpp clang/lib/CodeGen/CodeGenFunction.h clang/lib/Sema/SemaExceptionSpec.cpp clang/lib/Sema/SemaExpr.cpp clang/lib/Sema/SemaExprMember.cpp clang/lib/Sema/SemaHLSL.cpp clang/lib/Sema/TreeTransform.h clang/lib/Serialization/ASTReaderStmt.cpp clang/lib/Serialization/ASTWriterStmt.cpp clang/lib/StaticAnalyzer/Core/ExprEngine.cpp clang/tools/libclang/CXCursor.cpp --diff_from_common_commit
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diff --git a/clang/lib/CIR/CodeGen/CIRGenExpr.cpp b/clang/lib/CIR/CodeGen/CIRGenExpr.cpp
index 961bc54f5..678b67e2b 100644
--- a/clang/lib/CIR/CodeGen/CIRGenExpr.cpp
+++ b/clang/lib/CIR/CodeGen/CIRGenExpr.cpp
@@ -1203,8 +1203,8 @@ CIRGenFunction::emitArraySubscriptExpr(const clang::ArraySubscriptExpr *e) {
 }
 
 LValue CIRGenFunction::emitMatrixElementExpr(const MatrixElementExpr *e) {
-   // FIXME: support "matrix swizzle" if/when CIR needs it.
-   return emitUnsupportedLValue(E, "Matrix swizzle");
+  // FIXME: support "matrix swizzle" if/when CIR needs it.
+  return emitUnsupportedLValue(E, "Matrix swizzle");
 }
 
 LValue CIRGenFunction::emitExtVectorElementExpr(const ExtVectorElementExpr *e) {

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https://github.com/llvm/llvm-project/pull/171225