Interned MainFileID within SourceManager. Since SourceManager is referenced by
both Preprocessor and ASTContext, we no longer need to explicitly pass
MainFileID around in function calls that also pass either Preprocessor or
ASTContext. This resulted in some nice cleanups in the ASTConsumers and the
driver.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@45228 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/Driver/ASTConsumers.cpp b/Driver/ASTConsumers.cpp
index 02e30d3..add349c 100644
--- a/Driver/ASTConsumers.cpp
+++ b/Driver/ASTConsumers.cpp
@@ -356,7 +356,7 @@
   public:
     ASTDumper() : DeclPrinter() {}
     
-    void Initialize(ASTContext &Context, unsigned MainFileID) {
+    void Initialize(ASTContext &Context) {
       SM = &Context.getSourceManager();
     }
     
@@ -400,7 +400,7 @@
   class ASTViewer : public ASTConsumer {
     SourceManager *SM;
   public:
-    void Initialize(ASTContext &Context, unsigned MainFileID) {
+    void Initialize(ASTContext &Context) {
       SM = &Context.getSourceManager();
     }
     
@@ -482,7 +482,7 @@
   class LivenessVisitor : public CFGVisitor {
     SourceManager *SM;
   public:
-    virtual void Initialize(ASTContext &Context, unsigned MainFileID) {
+    virtual void Initialize(ASTContext &Context) {
       SM = &Context.getSourceManager();
     }
 
@@ -507,7 +507,7 @@
     ASTContext *Ctx;
   public:
     DeadStoreVisitor(Diagnostic &diags) : Diags(diags) {}
-    virtual void Initialize(ASTContext &Context, unsigned MainFileID) {
+    virtual void Initialize(ASTContext &Context) {
       Ctx = &Context;
     }
     
@@ -530,7 +530,7 @@
     ASTContext *Ctx;
   public:
     UninitValsVisitor(Diagnostic &diags) : Diags(diags) {}
-    virtual void Initialize(ASTContext &Context, unsigned MainFileID) {
+    virtual void Initialize(ASTContext &Context) {
       Ctx = &Context;
     }
     
@@ -565,7 +565,7 @@
     LLVMEmitter(Diagnostic &diags, const LangOptions &LO) 
       : Diags(diags)
       , Features(LO) {}
-    virtual void Initialize(ASTContext &Context, unsigned MainFileID) {
+    virtual void Initialize(ASTContext &Context) {
       Ctx = &Context;
       M = new llvm::Module("foo");
       M->setTargetTriple(Ctx->Target.getTargetTriple());
@@ -618,7 +618,7 @@
                   const LangOptions &LO)
     : Diags(diags), TU(LO), FName(F) {}
     
-    virtual void Initialize(ASTContext &Context, unsigned MainFileID) {
+    virtual void Initialize(ASTContext &Context) {
       TU.setContext(&Context);
     }
     
diff --git a/Driver/DiagChecker.cpp b/Driver/DiagChecker.cpp
index 53eed43..cc5dd75 100644
--- a/Driver/DiagChecker.cpp
+++ b/Driver/DiagChecker.cpp
@@ -82,16 +82,16 @@
   }
 }
 
-/// FindExpectedDiags - Lex the file to finds all of the expected errors and
-/// warnings.
-static void FindExpectedDiags(Preprocessor &PP, unsigned MainFileID,
+/// FindExpectedDiags - Lex the main source file to find all of the
+//   expected errors and warnings.
+static void FindExpectedDiags(Preprocessor &PP,
                               DiagList &ExpectedErrors,
                               DiagList &ExpectedWarnings) {
   // Return comments as tokens, this is how we find expected diagnostics.
   PP.SetCommentRetentionState(true, true);
 
   // Enter the cave.
-  PP.EnterMainSourceFile(MainFileID);
+  PP.EnterMainSourceFile();
 
   // Turn off all warnings from relexing or preprocessing.
   PP.getDiagnostics().setWarnOnExtensions(false);
@@ -225,14 +225,14 @@
 
 
 /// CheckASTConsumer - Implement diagnostic checking for AST consumers.
-bool clang::CheckASTConsumer(Preprocessor &PP, unsigned MainFileID,
-                             ASTConsumer* C) {
+bool clang::CheckASTConsumer(Preprocessor &PP, ASTConsumer* C) {
+  
   // Parse the AST and run the consumer, ultimately deleting C.
-  ParseAST(PP, MainFileID, C);
+  ParseAST(PP, C);
   
   // Gather the set of expected diagnostics.
   DiagList ExpectedErrors, ExpectedWarnings;
-  FindExpectedDiags(PP, MainFileID, ExpectedErrors, ExpectedWarnings);
+  FindExpectedDiags(PP, ExpectedErrors, ExpectedWarnings);
 
   // Check that the expected diagnostics occurred.
   return CheckResults(PP, ExpectedErrors, ExpectedWarnings);
diff --git a/Driver/PrintPreprocessedOutput.cpp b/Driver/PrintPreprocessedOutput.cpp
index 109664b..0c8a62e 100644
--- a/Driver/PrintPreprocessedOutput.cpp
+++ b/Driver/PrintPreprocessedOutput.cpp
@@ -531,7 +531,7 @@
 
 /// DoPrintPreprocessedInput - This implements -E mode.
 ///
-void clang::DoPrintPreprocessedInput(unsigned MainFileID, Preprocessor &PP) {
+void clang::DoPrintPreprocessedInput(Preprocessor &PP) {
   // Inform the preprocessor whether we want it to retain comments or not, due
   // to -C or -CC.
   PP.SetCommentRetentionState(EnableCommentOutput, EnableMacroCommentOutput);
@@ -550,7 +550,7 @@
   // After we have configured the preprocessor, enter the main file.
   
   // Start parsing the specified input file.
-  PP.EnterMainSourceFile(MainFileID);
+  PP.EnterMainSourceFile();
 
   // Consume all of the tokens that come from the predefines buffer.  Those
   // should not be emitted into the output and are guaranteed to be at the
diff --git a/Driver/RewriteTest.cpp b/Driver/RewriteTest.cpp
index c5de070..c9dd0f7 100644
--- a/Driver/RewriteTest.cpp
+++ b/Driver/RewriteTest.cpp
@@ -62,7 +62,7 @@
     
     static const int OBJC_ABI_VERSION =7 ;
   public:
-    void Initialize(ASTContext &context, unsigned mainFileID) {
+    void Initialize(ASTContext &context) {
       Context = &context;
       SM = &Context->getSourceManager();
       MsgSendFunctionDecl = 0;
@@ -81,7 +81,7 @@
       SuperStructDecl = 0;
       
       // Get the ID and start/end of the main file.
-      MainFileID = mainFileID;
+      MainFileID = SM->getMainFileID();
       const llvm::MemoryBuffer *MainBuf = SM->getBuffer(MainFileID);
       MainFileStart = MainBuf->getBufferStart();
       MainFileEnd = MainBuf->getBufferEnd();
@@ -123,7 +123,7 @@
                       "extern Protocol *objc_getProtocol(const char *);\n"
                       "#include <objc/objc.h>\n";
 
-      Rewrite.InsertText(SourceLocation::getFileLoc(mainFileID, 0), 
+      Rewrite.InsertText(SourceLocation::getFileLoc(MainFileID, 0), 
                          s, strlen(s));
     }
 
diff --git a/Driver/SerializationTest.cpp b/Driver/SerializationTest.cpp
index d43b570..a668c74 100644
--- a/Driver/SerializationTest.cpp
+++ b/Driver/SerializationTest.cpp
@@ -42,7 +42,7 @@
   
   ~SerializationTest();
 
-  virtual void Initialize(ASTContext& context, unsigned) {
+  virtual void Initialize(ASTContext& context) {
     TU.setContext(&context);
   }  
 
diff --git a/Driver/clang.cpp b/Driver/clang.cpp
index 1bb4a1a..f38c83a 100644
--- a/Driver/clang.cpp
+++ b/Driver/clang.cpp
@@ -878,9 +878,9 @@
 // Basic Parser driver
 //===----------------------------------------------------------------------===//
 
-static void ParseFile(Preprocessor &PP, MinimalAction *PA, unsigned MainFileID){
+static void ParseFile(Preprocessor &PP, MinimalAction *PA){
   Parser P(PP, *PA);
-  PP.EnterMainSourceFile(MainFileID);
+  PP.EnterMainSourceFile();
   
   // Parsing the specified input file.
   P.ParseTranslationUnit();
@@ -963,7 +963,7 @@
   case DumpTokens: {                 // Token dump mode.
     Token Tok;
     // Start parsing the specified input file.
-    PP.EnterMainSourceFile(MainFileID);
+    PP.EnterMainSourceFile();
     do {
       PP.Lex(Tok);
       PP.DumpToken(Tok, true);
@@ -975,7 +975,7 @@
   case RunPreprocessorOnly: {        // Just lex as fast as we can, no output.
     Token Tok;
     // Start parsing the specified input file.
-    PP.EnterMainSourceFile(MainFileID);
+    PP.EnterMainSourceFile();
     do {
       PP.Lex(Tok);
     } while (Tok.isNot(tok::eof));
@@ -984,18 +984,17 @@
   }
     
   case PrintPreprocessedInput:       // -E mode.
-    DoPrintPreprocessedInput(MainFileID, PP);
+    DoPrintPreprocessedInput(PP);
     ClearSourceMgr = true;
     break;
     
   case ParseNoop:                    // -parse-noop
-    ParseFile(PP, new MinimalAction(PP.getIdentifierTable()), MainFileID);
+    ParseFile(PP, new MinimalAction(PP.getIdentifierTable()));
     ClearSourceMgr = true;
     break;
     
   case ParsePrintCallbacks:
-    ParseFile(PP, CreatePrintParserActionsAction(PP.getIdentifierTable()), 
-              MainFileID);
+    ParseFile(PP, CreatePrintParserActionsAction(PP.getIdentifierTable()));
     ClearSourceMgr = true;
     break;
       
@@ -1006,10 +1005,10 @@
   
   if (Consumer) {
     if (VerifyDiagnostics)
-      exit(CheckASTConsumer(PP, MainFileID, Consumer));
+      exit(CheckASTConsumer(PP, Consumer));
     
     // This deletes Consumer.
-    ParseAST(PP, MainFileID, Consumer, Stats);
+    ParseAST(PP, Consumer, Stats);
   }
   
   if (Stats) {
@@ -1062,8 +1061,7 @@
     exit (1);
   }
   
-  // FIXME: only work on consumers that do not require MainFileID.
-  Consumer->Initialize(*TU->getContext(), 0);
+  Consumer->Initialize(*TU->getContext());
   
   for (TranslationUnit::iterator I=TU->begin(), E=TU->end(); I!=E; ++I)
     Consumer->HandleTopLevelDecl(*I);
diff --git a/Driver/clang.h b/Driver/clang.h
index 77ce59e..d6b7179 100644
--- a/Driver/clang.h
+++ b/Driver/clang.h
@@ -27,18 +27,17 @@
 class SourceManager;
 
 /// DoPrintPreprocessedInput - Implement -E mode.
-void DoPrintPreprocessedInput(unsigned MainFileID, Preprocessor &PP);
+void DoPrintPreprocessedInput(Preprocessor &PP);
 
 /// CreatePrintParserActionsAction - Return the actions implementation that
 /// implements the -parse-print-callbacks option.
 MinimalAction *CreatePrintParserActionsAction(IdentifierTable &);
 
 /// EmitLLVMFromASTs - Implement -emit-llvm, which generates llvm IR from C.
-void EmitLLVMFromASTs(Preprocessor &PP, unsigned MainFileID,
-                      bool PrintStats);
+void EmitLLVMFromASTs(Preprocessor &PP, bool PrintStats);
   
 /// CheckASTConsumer - Implement diagnostic checking for AST consumers.
-bool CheckASTConsumer(Preprocessor &PP, unsigned MainFileID, ASTConsumer* C);
+bool CheckASTConsumer(Preprocessor &PP, ASTConsumer* C);
 
 
 }  // end namespace clang