[NFC] Move RegisterBuiltinMacro function into the Preprocessor class (#100142)

The `RegisterBuiltinMacro` function has been moved to the Preprocessor
class for accessibility and has been refactored for readability.

Author: muiez

clang/include/clang/Lex/Preprocessor.h

@@ -2617,6 +2617,19 @@ class Preprocessor {
   /// \#pragma GCC poison/system_header/dependency and \#pragma once.
   void RegisterBuiltinPragmas();
 
+  /// RegisterBuiltinMacro - Register the specified identifier in the identifier
+  /// table and mark it as a builtin macro to be expanded.
+  IdentifierInfo *RegisterBuiltinMacro(const char *Name) {
+    // Get the identifier.
+    IdentifierInfo *Id = getIdentifierInfo(Name);
+
+    // Mark it as being a macro that is builtin.
+    MacroInfo *MI = AllocateMacroInfo(SourceLocation());
+    MI->setIsBuiltinMacro();
+    appendDefMacroDirective(Id, MI);
+    return Id;
+  }
+
   /// Register builtin macros such as __LINE__ with the identifier table.
   void RegisterBuiltinMacros();
 

clang/lib/Lex/PPMacroExpansion.cpp

@@ -323,84 +323,69 @@ void Preprocessor::dumpMacroInfo(const IdentifierInfo *II) {
   }
 }
 
-/// RegisterBuiltinMacro - Register the specified identifier in the identifier
-/// table and mark it as a builtin macro to be expanded.
-static IdentifierInfo *RegisterBuiltinMacro(Preprocessor &PP, const char *Name){
-  // Get the identifier.
-  IdentifierInfo *Id = PP.getIdentifierInfo(Name);
-
-  // Mark it as being a macro that is builtin.
-  MacroInfo *MI = PP.AllocateMacroInfo(SourceLocation());
-  MI->setIsBuiltinMacro();
-  PP.appendDefMacroDirective(Id, MI);
-  return Id;
-}
-
 /// RegisterBuiltinMacros - Register builtin macros, such as __LINE__ with the
 /// identifier table.
 void Preprocessor::RegisterBuiltinMacros() {
-  Ident__LINE__ = RegisterBuiltinMacro(*this, "__LINE__");
-  Ident__FILE__ = RegisterBuiltinMacro(*this, "__FILE__");
-  Ident__DATE__ = RegisterBuiltinMacro(*this, "__DATE__");
-  Ident__TIME__ = RegisterBuiltinMacro(*this, "__TIME__");
-  Ident__COUNTER__ = RegisterBuiltinMacro(*this, "__COUNTER__");
-  Ident_Pragma  = RegisterBuiltinMacro(*this, "_Pragma");
-  Ident__FLT_EVAL_METHOD__ = RegisterBuiltinMacro(*this, "__FLT_EVAL_METHOD__");
+  Ident__LINE__ = RegisterBuiltinMacro("__LINE__");
+  Ident__FILE__ = RegisterBuiltinMacro("__FILE__");
+  Ident__DATE__ = RegisterBuiltinMacro("__DATE__");
+  Ident__TIME__ = RegisterBuiltinMacro("__TIME__");
+  Ident__COUNTER__ = RegisterBuiltinMacro("__COUNTER__");
+  Ident_Pragma = RegisterBuiltinMacro("_Pragma");
+  Ident__FLT_EVAL_METHOD__ = RegisterBuiltinMacro("__FLT_EVAL_METHOD__");
 
   // C++ Standing Document Extensions.
   if (getLangOpts().CPlusPlus)
-    Ident__has_cpp_attribute =
-        RegisterBuiltinMacro(*this, "__has_cpp_attribute");
+    Ident__has_cpp_attribute = RegisterBuiltinMacro("__has_cpp_attribute");
   else
     Ident__has_cpp_attribute = nullptr;
 
   // GCC Extensions.
-  Ident__BASE_FILE__     = RegisterBuiltinMacro(*this, "__BASE_FILE__");
-  Ident__INCLUDE_LEVEL__ = RegisterBuiltinMacro(*this, "__INCLUDE_LEVEL__");
-  Ident__TIMESTAMP__     = RegisterBuiltinMacro(*this, "__TIMESTAMP__");
+  Ident__BASE_FILE__ = RegisterBuiltinMacro("__BASE_FILE__");
+  Ident__INCLUDE_LEVEL__ = RegisterBuiltinMacro("__INCLUDE_LEVEL__");
+  Ident__TIMESTAMP__ = RegisterBuiltinMacro("__TIMESTAMP__");
 
   // Microsoft Extensions.
   if (getLangOpts().MicrosoftExt) {
-    Ident__identifier = RegisterBuiltinMacro(*this, "__identifier");
-    Ident__pragma = RegisterBuiltinMacro(*this, "__pragma");
+    Ident__identifier = RegisterBuiltinMacro("__identifier");
+    Ident__pragma = RegisterBuiltinMacro("__pragma");
   } else {
     Ident__identifier = nullptr;
     Ident__pragma = nullptr;
   }
 
   // Clang Extensions.
-  Ident__FILE_NAME__      = RegisterBuiltinMacro(*this, "__FILE_NAME__");
-  Ident__has_feature      = RegisterBuiltinMacro(*this, "__has_feature");
-  Ident__has_extension    = RegisterBuiltinMacro(*this, "__has_extension");
-  Ident__has_builtin      = RegisterBuiltinMacro(*this, "__has_builtin");
+  Ident__FILE_NAME__ = RegisterBuiltinMacro("__FILE_NAME__");
+  Ident__has_feature = RegisterBuiltinMacro("__has_feature");
+  Ident__has_extension = RegisterBuiltinMacro("__has_extension");
+  Ident__has_builtin = RegisterBuiltinMacro("__has_builtin");
   Ident__has_constexpr_builtin =
-      RegisterBuiltinMacro(*this, "__has_constexpr_builtin");
-  Ident__has_attribute    = RegisterBuiltinMacro(*this, "__has_attribute");
+      RegisterBuiltinMacro("__has_constexpr_builtin");
+  Ident__has_attribute = RegisterBuiltinMacro("__has_attribute");
   if (!getLangOpts().CPlusPlus)
-    Ident__has_c_attribute = RegisterBuiltinMacro(*this, "__has_c_attribute");
+    Ident__has_c_attribute = RegisterBuiltinMacro("__has_c_attribute");
   else
     Ident__has_c_attribute = nullptr;
 
-  Ident__has_declspec = RegisterBuiltinMacro(*this, "__has_declspec_attribute");
-  Ident__has_embed = RegisterBuiltinMacro(*this, "__has_embed");
-  Ident__has_include      = RegisterBuiltinMacro(*this, "__has_include");
-  Ident__has_include_next = RegisterBuiltinMacro(*this, "__has_include_next");
-  Ident__has_warning      = RegisterBuiltinMacro(*this, "__has_warning");
-  Ident__is_identifier    = RegisterBuiltinMacro(*this, "__is_identifier");
-  Ident__is_target_arch   = RegisterBuiltinMacro(*this, "__is_target_arch");
-  Ident__is_target_vendor = RegisterBuiltinMacro(*this, "__is_target_vendor");
-  Ident__is_target_os     = RegisterBuiltinMacro(*this, "__is_target_os");
+  Ident__has_declspec = RegisterBuiltinMacro("__has_declspec_attribute");
+  Ident__has_embed = RegisterBuiltinMacro("__has_embed");
+  Ident__has_include = RegisterBuiltinMacro("__has_include");
+  Ident__has_include_next = RegisterBuiltinMacro("__has_include_next");
+  Ident__has_warning = RegisterBuiltinMacro("__has_warning");
+  Ident__is_identifier = RegisterBuiltinMacro("__is_identifier");
+  Ident__is_target_arch = RegisterBuiltinMacro("__is_target_arch");
+  Ident__is_target_vendor = RegisterBuiltinMacro("__is_target_vendor");
+  Ident__is_target_os = RegisterBuiltinMacro("__is_target_os");
   Ident__is_target_environment =
-      RegisterBuiltinMacro(*this, "__is_target_environment");
-  Ident__is_target_variant_os =
-      RegisterBuiltinMacro(*this, "__is_target_variant_os");
+      RegisterBuiltinMacro("__is_target_environment");
+  Ident__is_target_variant_os = RegisterBuiltinMacro("__is_target_variant_os");
   Ident__is_target_variant_environment =
-      RegisterBuiltinMacro(*this, "__is_target_variant_environment");
+      RegisterBuiltinMacro("__is_target_variant_environment");
 
   // Modules.
-  Ident__building_module  = RegisterBuiltinMacro(*this, "__building_module");
+  Ident__building_module = RegisterBuiltinMacro("__building_module");
   if (!getLangOpts().CurrentModule.empty())
-    Ident__MODULE__ = RegisterBuiltinMacro(*this, "__MODULE__");
+    Ident__MODULE__ = RegisterBuiltinMacro("__MODULE__");
   else
     Ident__MODULE__ = nullptr;
 }