Avoid including Builtins.h in Preprocessor.h

Builtins are rarely if ever accessed via the Preprocessor. They are
typically found on the ASTContext, so there should be no performance
penalty to using a pointer indirection to store the builtin context.

clang-tools-extra/clang-tidy/bugprone/MacroRepeatedSideEffectsCheck.cpp

@@ -7,6 +7,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "MacroRepeatedSideEffectsCheck.h"
+#include "clang/Basic/Builtins.h"
 #include "clang/Frontend/CompilerInstance.h"
 #include "clang/Lex/MacroArgs.h"
 #include "clang/Lex/PPCallbacks.h"

clang-tools-extra/clangd/index/FileIndex.cpp

@@ -16,6 +16,7 @@
 #include "index/Merge.h"
 #include "index/SymbolOrigin.h"
 #include "index/dex/Dex.h"
+#include "clang/AST/ASTContext.h"
 #include "clang/Index/IndexingAction.h"
 #include "clang/Index/IndexingOptions.h"
 #include "clang/Lex/MacroInfo.h"

clang-tools-extra/clangd/index/FileIndex.h

@@ -25,6 +25,7 @@
 #include <memory>
 
 namespace clang {
+class ASTContext;
 namespace clangd {
 class ParsedAST;
 

clang/include/clang/Basic/Builtins.h

@@ -25,8 +25,6 @@
 namespace clang {
 class TargetInfo;
 class IdentifierTable;
-class ASTContext;
-class QualType;
 class LangOptions;
 
 enum LanguageID {

clang/include/clang/Lex/Preprocessor.h

@@ -14,7 +14,6 @@
 #ifndef LLVM_CLANG_LEX_PREPROCESSOR_H
 #define LLVM_CLANG_LEX_PREPROCESSOR_H
 
-#include "clang/Basic/Builtins.h"
 #include "clang/Basic/Diagnostic.h"
 #include "clang/Basic/IdentifierTable.h"
 #include "clang/Basic/LLVM.h"
@@ -81,6 +80,10 @@ class PreprocessorOptions;
 class ScratchBuffer;
 class TargetInfo;
 
+namespace Builtin {
+class Context;
+}
+
 /// Stores token information for comparing actual tokens with
 /// predefined values.  Only handles simple tokens and identifiers.
 class TokenValue {
@@ -239,7 +242,7 @@ class Preprocessor {
   SelectorTable Selectors;
 
   /// Information about builtins.
-  Builtin::Context BuiltinInfo;
+  std::unique_ptr<Builtin::Context> BuiltinInfo;
 
   /// Tracks all of the pragmas that the client registered
   /// with this preprocessor.
@@ -911,7 +914,7 @@ public:
   IdentifierTable &getIdentifierTable() { return Identifiers; }
   const IdentifierTable &getIdentifierTable() const { return Identifiers; }
   SelectorTable &getSelectorTable() { return Selectors; }
-  Builtin::Context &getBuiltinInfo() { return BuiltinInfo; }
+  Builtin::Context &getBuiltinInfo() { return *BuiltinInfo; }
   llvm::BumpPtrAllocator &getPreprocessorAllocator() { return BP; }
 
   void setExternalSource(ExternalPreprocessorSource *Source) {

clang/lib/Analysis/ReachableCode.cpp

@@ -19,6 +19,7 @@
 #include "clang/AST/StmtCXX.h"
 #include "clang/Analysis/AnalysisDeclContext.h"
 #include "clang/Analysis/CFG.h"
+#include "clang/Basic/Builtins.h"
 #include "clang/Basic/SourceManager.h"
 #include "clang/Lex/Preprocessor.h"
 #include "llvm/ADT/BitVector.h"

clang/lib/Frontend/ChainedIncludesSource.cpp

@@ -11,6 +11,7 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "clang/Basic/Builtins.h"
 #include "clang/Basic/TargetInfo.h"
 #include "clang/Frontend/ASTUnit.h"
 #include "clang/Frontend/CompilerInstance.h"

clang/lib/Frontend/FrontendAction.cpp

@@ -10,6 +10,7 @@
 #include "clang/AST/ASTConsumer.h"
 #include "clang/AST/ASTContext.h"
 #include "clang/AST/DeclGroup.h"
+#include "clang/Basic/Builtins.h"
 #include "clang/Basic/LangStandard.h"
 #include "clang/Frontend/ASTUnit.h"
 #include "clang/Frontend/CompilerInstance.h"

clang/lib/Lex/PPMacroExpansion.cpp

@@ -12,6 +12,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "clang/Basic/Attributes.h"
+#include "clang/Basic/Builtins.h"
 #include "clang/Basic/FileManager.h"
 #include "clang/Basic/IdentifierTable.h"
 #include "clang/Basic/LLVM.h"
@@ -35,9 +36,9 @@
 #include "llvm/ADT/FoldingSet.h"
 #include "llvm/ADT/None.h"
 #include "llvm/ADT/Optional.h"
+#include "llvm/ADT/STLExtras.h"
 #include "llvm/ADT/SmallString.h"
 #include "llvm/ADT/SmallVector.h"
-#include "llvm/ADT/STLExtras.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/ADT/StringSwitch.h"
 #include "llvm/Support/Casting.h"

clang/lib/Lex/Preprocessor.cpp

@@ -25,6 +25,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "clang/Lex/Preprocessor.h"
+#include "clang/Basic/Builtins.h"
 #include "clang/Basic/FileManager.h"
 #include "clang/Basic/FileSystemStatCache.h"
 #include "clang/Basic/IdentifierTable.h"
@@ -53,9 +54,9 @@
 #include "llvm/ADT/APInt.h"
 #include "llvm/ADT/ArrayRef.h"
 #include "llvm/ADT/DenseMap.h"
+#include "llvm/ADT/STLExtras.h"
 #include "llvm/ADT/SmallString.h"
 #include "llvm/ADT/SmallVector.h"
-#include "llvm/ADT/STLExtras.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/ADT/StringSwitch.h"
 #include "llvm/Support/Capacity.h"
@@ -202,7 +203,8 @@ void Preprocessor::Initialize(const TargetInfo &Target,
   this->AuxTarget = AuxTarget;
 
   // Initialize information about built-ins.
-  BuiltinInfo.InitializeTarget(Target, AuxTarget);
+  BuiltinInfo = std::make_unique<Builtin::Context>();
+  BuiltinInfo->InitializeTarget(Target, AuxTarget);
   HeaderInfo.setTarget(Target);
 
   // Populate the identifier table with info about keywords for the current language.

clang/lib/Sema/SemaCoroutine.cpp

@@ -18,6 +18,7 @@
 #include "clang/AST/Decl.h"
 #include "clang/AST/ExprCXX.h"
 #include "clang/AST/StmtCXX.h"
+#include "clang/Basic/Builtins.h"
 #include "clang/Lex/Preprocessor.h"
 #include "clang/Sema/Initialization.h"
 #include "clang/Sema/Overload.h"

clang/lib/Sema/SemaExpr.cpp

@@ -25,6 +25,7 @@
 #include "clang/AST/ExprOpenMP.h"
 #include "clang/AST/RecursiveASTVisitor.h"
 #include "clang/AST/TypeLoc.h"
+#include "clang/Basic/Builtins.h"
 #include "clang/Basic/FixedPoint.h"
 #include "clang/Basic/PartialDiagnostic.h"
 #include "clang/Basic/SourceManager.h"

clang/lib/Sema/SemaExprObjC.cpp

@@ -10,13 +10,13 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "clang/Sema/SemaInternal.h"
 #include "clang/AST/ASTContext.h"
 #include "clang/AST/DeclObjC.h"
 #include "clang/AST/ExprObjC.h"
 #include "clang/AST/StmtVisitor.h"
 #include "clang/AST/TypeLoc.h"
 #include "clang/Analysis/DomainSpecific/CocoaConventions.h"
+#include "clang/Basic/Builtins.h"
 #include "clang/Edit/Commit.h"
 #include "clang/Edit/Rewriters.h"
 #include "clang/Lex/Preprocessor.h"
@@ -24,6 +24,7 @@
 #include "clang/Sema/Lookup.h"
 #include "clang/Sema/Scope.h"
 #include "clang/Sema/ScopeInfo.h"
+#include "clang/Sema/SemaInternal.h"
 #include "llvm/ADT/SmallString.h"
 #include "llvm/Support/ConvertUTF.h"
 

lldb/source/Plugins/ExpressionParser/Clang/ClangExpressionParser.cpp

@@ -10,6 +10,7 @@
 #include "clang/AST/ASTDiagnostic.h"
 #include "clang/AST/ExternalASTSource.h"
 #include "clang/AST/PrettyPrinter.h"
+#include "clang/Basic/Builtins.h"
 #include "clang/Basic/DiagnosticIDs.h"
 #include "clang/Basic/SourceLocation.h"
 #include "clang/Basic/TargetInfo.h"