[clang] [HLSL][RootSignature] Define and integrate rootsig clang attr and decl (PR #137690)

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``````````bash
git-clang-format --diff HEAD~1 HEAD --extensions h,cpp -- clang/include/clang/AST/Decl.h clang/include/clang/AST/RecursiveASTVisitor.h clang/include/clang/AST/TextNodeDumper.h clang/include/clang/Parse/Parser.h clang/include/clang/Sema/SemaHLSL.h clang/lib/AST/Decl.cpp clang/lib/AST/DeclBase.cpp clang/lib/AST/TextNodeDumper.cpp clang/lib/CodeGen/CGDecl.cpp clang/lib/Parse/ParseDeclCXX.cpp clang/lib/Sema/SemaDeclAttr.cpp clang/lib/Sema/SemaHLSL.cpp clang/lib/Sema/SemaTemplateInstantiateDecl.cpp clang/lib/Serialization/ASTCommon.cpp clang/tools/libclang/CIndex.cpp
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View the diff from clang-format here.
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``````````diff
diff --git a/clang/lib/AST/TextNodeDumper.cpp b/clang/lib/AST/TextNodeDumper.cpp
index 8263bbc99..7cc7637a4 100644
--- a/clang/lib/AST/TextNodeDumper.cpp
+++ b/clang/lib/AST/TextNodeDumper.cpp
@@ -3037,7 +3037,8 @@ void TextNodeDumper::VisitHLSLBufferDecl(const HLSLBufferDecl *D) {
   dumpName(D);
 }
 
-void TextNodeDumper::VisitHLSLRootSignatureDecl(const HLSLRootSignatureDecl *D) {
+void TextNodeDumper::VisitHLSLRootSignatureDecl(
+    const HLSLRootSignatureDecl *D) {
   dumpName(D);
 }
 

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https://github.com/llvm/llvm-project/pull/137690