[lld] [lld][MachO] Implement -emit-tbd-only= (PR #194899)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions h,cpp -- lld/MachO/Config.h lld/MachO/Driver.cpp lld/MachO/InputFiles.cpp lld/MachO/LTO.cpp lld/MachO/LTO.h lld/MachO/SymbolTable.cpp lld/MachO/SymbolTable.h lld/MachO/Symbols.cpp lld/MachO/Symbols.h --diff_from_common_commit
``````````

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``````````diff
diff --git a/lld/MachO/Driver.cpp b/lld/MachO/Driver.cpp
index abb827a6f..a6001f1b1 100644
--- a/lld/MachO/Driver.cpp
+++ b/lld/MachO/Driver.cpp
@@ -1640,7 +1640,8 @@ static void handleExplicitExports() {
   static constexpr int kMaxWarnings = 3;
   if (config->hasExplicitExports) {
     std::atomic<uint64_t> warningsCount{0};
-    parallelForEach(symtab->getSymbols(), [&warningsCount](lld::macho::Symbol *sym) {
+    parallelForEach(symtab->getSymbols(), [&warningsCount](
+                                              lld::macho::Symbol *sym) {
       if (auto *defined = dyn_cast<Defined>(sym)) {
         if (config->exportedSymbols.match(sym->getName())) {
           if (defined->privateExtern) {
@@ -1716,7 +1717,6 @@ static void resolveBitcodeProvidedSymbolsForTBDGeneration() {
         lto->add(*bitcodeFile, /* forTBDGeneration */ true);
 }
 
-
 static void writeTBD(const StringRef outputPath) {
   std::error_code errorCode;
   llvm::raw_fd_ostream os(outputPath, errorCode, llvm::sys::fs::OF_Text);
diff --git a/lld/MachO/InputFiles.cpp b/lld/MachO/InputFiles.cpp
index 41a8eabd9..de54bede9 100644
--- a/lld/MachO/InputFiles.cpp
+++ b/lld/MachO/InputFiles.cpp
@@ -2343,8 +2343,7 @@ static macho::Symbol *createBitcodeSymbol(const lto::InputFile::Symbol &objSym,
                             /*isReferencedDynamically=*/false,
                             /*noDeadStrip=*/false,
                             /*isWeakDefCanBeHidden=*/false,
-                            /*isTlv*/ objSym.isTLS()
-  );
+                            /*isTlv*/ objSym.isTLS());
 }
 
 BitcodeFile::BitcodeFile(MemoryBufferRef mb, StringRef archiveName,
diff --git a/lld/MachO/LTO.cpp b/lld/MachO/LTO.cpp
index 8b2317dc1..67a0b2b49 100644
--- a/lld/MachO/LTO.cpp
+++ b/lld/MachO/LTO.cpp
@@ -159,8 +159,7 @@ void BitcodeCompiler::add(BitcodeFile &f, bool forTBDGeneration) {
 
     // Un-define the symbol so that we don't get duplicate symbol errors when we
     // load the ObjFile emitted by LTO compilation.
-    if (r.Prevailing)
-    {
+    if (r.Prevailing) {
       // Symbol resolution for bitcode provided symbols works slightly
       // differently from symbol resolution for native symbols. For
       // every symbol occurence (the same symbol name may occur multiple times),
diff --git a/lld/MachO/SymbolTable.cpp b/lld/MachO/SymbolTable.cpp
index ba928761f..ef55cf2a3 100644
--- a/lld/MachO/SymbolTable.cpp
+++ b/lld/MachO/SymbolTable.cpp
@@ -104,9 +104,7 @@ Defined *SymbolTable::addDefined(StringRef name, InputFile *file,
                                  uint64_t size, bool isWeakDef,
                                  bool isPrivateExtern,
                                  bool isReferencedDynamically, bool noDeadStrip,
-                                 bool isWeakDefCanBeHidden,
-                                 bool isTlv
-) {
+                                 bool isWeakDefCanBeHidden, bool isTlv) {
   bool overridesWeakDef = false;
   auto [s, wasInserted] = insert(name, file);
 
@@ -213,8 +211,7 @@ Defined *SymbolTable::addDefined(StringRef name, InputFile *file,
   Defined *defined = replaceSymbol<Defined>(
       s, name, file, isec, value, size, isWeakDef, /*isExternal=*/true,
       isPrivateExtern, /*includeInSymtab=*/true, isReferencedDynamically,
-      noDeadStrip, overridesWeakDef, isWeakDefCanBeHidden, interposable, isTlv
-  );
+      noDeadStrip, overridesWeakDef, isWeakDefCanBeHidden, interposable, isTlv);
   return defined;
 }
 
diff --git a/lld/MachO/SymbolTable.h b/lld/MachO/SymbolTable.h
index e1d99c081..bf9479999 100644
--- a/lld/MachO/SymbolTable.h
+++ b/lld/MachO/SymbolTable.h
@@ -40,8 +40,7 @@ public:
                       uint64_t value, uint64_t size, bool isWeakDef,
                       bool isPrivateExtern, bool isReferencedDynamically,
                       bool noDeadStrip, bool isWeakDefCanBeHidden,
-                      bool isTlv = false
-  );
+                      bool isTlv = false);
 
   Defined *aliasDefined(Defined *src, StringRef target, InputFile *newFile,
                         bool makePrivateExtern = false);
diff --git a/lld/MachO/Symbols.cpp b/lld/MachO/Symbols.cpp
index 5b5bd896f..38d82ae65 100644
--- a/lld/MachO/Symbols.cpp
+++ b/lld/MachO/Symbols.cpp
@@ -57,17 +57,14 @@ Defined::Defined(StringRef name, InputFile *file, InputSection *isec,
                  bool isPrivateExtern, bool includeInSymtab,
                  bool isReferencedDynamically, bool noDeadStrip,
                  bool canOverrideWeakDef, bool isWeakDefCanBeHidden,
-                 bool interposable,
-                 bool isTlv)
+                 bool interposable, bool isTlv)
     : Symbol(DefinedKind, name, file), overridesWeakDef(canOverrideWeakDef),
       privateExtern(isPrivateExtern), includeInSymtab(includeInSymtab),
       identicalCodeFoldingKind(ICFFoldKind::None),
       referencedDynamically(isReferencedDynamically), noDeadStrip(noDeadStrip),
       interposable(interposable), weakDefCanBeHidden(isWeakDefCanBeHidden),
       weakDef(isWeakDef), external(isExternal), originalIsec(isec),
-      value(value), size(size),
-      tlv(isTlv)
-{
+      value(value), size(size), tlv(isTlv) {
   if (isec) {
     isec->symbols.push_back(this);
     // Maintain sorted order.
diff --git a/lld/MachO/Symbols.h b/lld/MachO/Symbols.h
index 3ff35b74c..0cceb7f26 100644
--- a/lld/MachO/Symbols.h
+++ b/lld/MachO/Symbols.h
@@ -118,9 +118,7 @@ public:
           uint64_t size, bool isWeakDef, bool isExternal, bool isPrivateExtern,
           bool includeInSymtab, bool isReferencedDynamically, bool noDeadStrip,
           bool canOverrideWeakDef = false, bool isWeakDefCanBeHidden = false,
-          bool interposable = false,
-          bool isTlv = false
-  );
+          bool interposable = false, bool isTlv = false);
 
   bool isWeakDef() const override { return weakDef; }
   bool isExternalWeakDef() const {

``````````

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https://github.com/llvm/llvm-project/pull/194899