[NFC] Clean Up Some Unneeded TypeCheckerOptions

include/swift/Basic/LangOptions.h

@@ -484,11 +484,7 @@ namespace swift {
     /// 4.2 GHz Intel Core i7.
     /// (It's arbitrary, but will keep the compiler from taking too much time.)
     unsigned SwitchCheckingInvocationThreshold = 200000;
-
-    /// Whether to delay checking that benefits from having the entire
-    /// module parsed, e.g., Objective-C method override checking.
-    bool DelayWholeModuleChecking = false;
-
+
     /// If true, the time it takes to type-check each function will be dumped
     /// to llvm::errs().
     bool DebugTimeFunctionBodies = false;
@@ -497,11 +493,6 @@ namespace swift {
     /// dumped to llvm::errs().
     bool DebugTimeExpressions = false;
 
-    /// Indicate that the type checker is checking code that will be
-    /// immediately executed. This will suppress certain warnings
-    /// when executing scripts.
-    bool InImmediateMode = false;
-
     /// Indicate that the type checker should skip type-checking non-inlinable
     /// function bodies.
     bool SkipNonInlinableFunctionBodies = false;

lib/AST/TypeCheckRequests.cpp

@@ -1451,24 +1451,6 @@ void TypeCheckSourceFileRequest::cacheResult(evaluator::SideEffect) const {
     FrontendStatsTracer tracer(Ctx.Stats, "AST verification");
     // Verify the SourceFile.
     swift::verify(*SF);
-
-    // Verify imported modules.
-    //
-    // Skip per-file verification in whole-module mode. Verifying imports
-    // between files could cause the importer to cache declarations without
-    // adding them to the ASTContext. This happens when the importer registers a
-    // declaration without a valid TypeChecker instance, as is the case during
-    // verification. A subsequent file may require that declaration to be fully
-    // imported (e.g. to synthesized a function body), but since it has already
-    // been cached, it will never be added to the ASTContext. The solution is to
-    // skip verification and avoid caching it.
-#ifndef NDEBUG
-    if (!Ctx.TypeCheckerOpts.DelayWholeModuleChecking &&
-        SF->Kind != SourceFileKind::SIL &&
-        !Ctx.LangOpts.DebuggerSupport) {
-      Ctx.verifyAllLoadedModules();
-    }
-#endif
   }
 }
 

lib/Frontend/Frontend.cpp

@@ -311,15 +311,6 @@ bool CompilerInstance::setup(const CompilerInvocation &Invok) {
     Invocation.getLangOptions().AttachCommentsToDecls = true;
   }
 
-  // Set up the type checker options.
-  auto &typeCkOpts = Invocation.getTypeCheckerOptions();
-  if (isWholeModuleCompilation()) {
-    typeCkOpts.DelayWholeModuleChecking = true;
-  }
-  if (FrontendOptions::isActionImmediate(frontendOpts.RequestedAction)) {
-    typeCkOpts.InImmediateMode = true;
-  }
-
   assert(Lexer::isIdentifier(Invocation.getModuleName()));
 
   if (isInSILMode())
@@ -871,19 +862,16 @@ bool CompilerInstance::loadPartialModulesAndImplicitImports() {
   return hadLoadError;
 }
 
-static void
-forEachSourceFileIn(ModuleDecl *module,
-                    llvm::function_ref<void(SourceFile &)> fn) {
-  for (auto fileName : module->getFiles()) {
-    if (auto SF = dyn_cast<SourceFile>(fileName))
-      fn(*SF);
-  }
-}
-
 void CompilerInstance::forEachFileToTypeCheck(
     llvm::function_ref<void(SourceFile &)> fn) {
   if (isWholeModuleCompilation()) {
-    forEachSourceFileIn(MainModule, [&](SourceFile &SF) { fn(SF); });
+    for (auto fileName : MainModule->getFiles()) {
+      auto *SF = dyn_cast<SourceFile>(fileName);
+      if (!SF) {
+        continue;
+      }
+      fn(*SF);
+    }
   } else {
     for (auto *SF : PrimarySourceFiles) {
       fn(*SF);
@@ -892,11 +880,9 @@ void CompilerInstance::forEachFileToTypeCheck(
 }
 
 void CompilerInstance::finishTypeChecking() {
-  if (getASTContext().TypeCheckerOpts.DelayWholeModuleChecking) {
-    forEachSourceFileIn(MainModule, [&](SourceFile &SF) {
-      performWholeModuleTypeChecking(SF);
-    });
-  }
+  forEachFileToTypeCheck([](SourceFile &SF) {
+    performWholeModuleTypeChecking(SF);
+  });
 }
 
 SourceFile *CompilerInstance::createSourceFileForMainModule(

lib/Sema/TypeChecker.cpp

@@ -357,11 +357,6 @@ TypeCheckSourceFileRequest::evaluate(Evaluator &eval, SourceFile *SF) const {
       CheckInconsistentImplementationOnlyImportsRequest{SF->getParentModule()},
       {});
 
-  // Checking that benefits from having the whole module available.
-  if (!Ctx.TypeCheckerOpts.DelayWholeModuleChecking) {
-    performWholeModuleTypeChecking(*SF);
-  }
-
   // Perform various AST transforms we've been asked to perform.
   if (!Ctx.hadError() && Ctx.LangOpts.DebuggerTestingTransform)
     performDebuggerTestingTransform(*SF);