[Serialization|NFC] Extract logic loading dependencies out of associateWithFileContext

lib/Serialization/ModuleFile.cpp

@@ -123,53 +123,13 @@ bool ModuleFile::allowCompilerErrors() const {
   return getContext().LangOpts.AllowModuleWithCompilerErrors;
 }
 
-Status ModuleFile::associateWithFileContext(FileUnit *file, SourceLoc diagLoc,
-                                            bool recoverFromIncompatibility) {
-  PrettyStackTraceModuleFile stackEntry(*this);
-
-  assert(!hasError() && "error already detected; should not call this");
-  assert(!FileContext && "already associated with an AST module");
-  FileContext = file;
-  Status status = Status::Valid;
-
-  ModuleDecl *M = file->getParentModule();
-  // The real (on-disk) name of the module should be checked here as that's the
-  // actually loaded module. In case module aliasing is used when building the main
-  // module, e.g. -module-name MyModule -module-alias Foo=Bar, the loaded module
-  // that maps to 'Foo' is actually Bar.swiftmodule|.swiftinterface (applies to swift
-  // modules only), which is retrieved via M->getRealName(). If no module aliasing is
-  // used, M->getRealName() will return the same value as M->getName(), which is 'Foo'.
-  if (M->getRealName().str() != Core->Name) {
-    return error(Status::NameMismatch);
-  }
-
+Status
+ModuleFile::loadDependenciesForFileContext(const FileUnit *file,
+                                           SourceLoc diagLoc,
+                                           bool forTestable) {
   ASTContext &ctx = getContext();
-
-  llvm::Triple moduleTarget(llvm::Triple::normalize(Core->TargetTriple));
-  if (!areCompatibleArchitectures(moduleTarget, ctx.LangOpts.Target) ||
-      !areCompatibleOSs(moduleTarget, ctx.LangOpts.Target)) {
-    status = Status::TargetIncompatible;
-    if (!recoverFromIncompatibility)
-      return error(status);
-  } else if (ctx.LangOpts.EnableTargetOSChecking && !M->isResilient() &&
-             isTargetTooNew(moduleTarget, ctx.LangOpts.Target)) {
-    status = Status::TargetTooNew;
-    if (!recoverFromIncompatibility)
-      return error(status);
-  }
-
-  StringRef SDKPath = ctx.SearchPathOpts.getSDKPath();
-  if (SDKPath.empty() ||
-      !Core->ModuleInputBuffer->getBufferIdentifier().startswith(SDKPath)) {
-    for (const auto &searchPath : Core->SearchPaths) {
-      ctx.addSearchPath(
-        ctx.SearchPathOpts.SearchPathRemapper.remapPath(searchPath.Path),
-        searchPath.IsFramework,
-        searchPath.IsSystem);
-    }
-  }
-
   auto clangImporter = static_cast<ClangImporter *>(ctx.getClangModuleLoader());
+  ModuleDecl *M = file->getParentModule();
 
   bool missingDependency = false;
   for (auto &dependency : Dependencies) {
@@ -259,6 +219,59 @@ Status ModuleFile::associateWithFileContext(FileUnit *file, SourceLoc diagLoc,
     return error(Status::MissingDependency);
   }
 
+  return Status::Valid;
+}
+
+Status ModuleFile::associateWithFileContext(FileUnit *file, SourceLoc diagLoc,
+                                            bool recoverFromIncompatibility) {
+  PrettyStackTraceModuleFile stackEntry(*this);
+
+  assert(!hasError() && "error already detected; should not call this");
+  assert(!FileContext && "already associated with an AST module");
+  FileContext = file;
+  Status status = Status::Valid;
+
+  ModuleDecl *M = file->getParentModule();
+  // The real (on-disk) name of the module should be checked here as that's the
+  // actually loaded module. In case module aliasing is used when building the main
+  // module, e.g. -module-name MyModule -module-alias Foo=Bar, the loaded module
+  // that maps to 'Foo' is actually Bar.swiftmodule|.swiftinterface (applies to swift
+  // modules only), which is retrieved via M->getRealName(). If no module aliasing is
+  // used, M->getRealName() will return the same value as M->getName(), which is 'Foo'.
+  if (M->getRealName().str() != Core->Name) {
+    return error(Status::NameMismatch);
+  }
+
+  ASTContext &ctx = getContext();
+
+  llvm::Triple moduleTarget(llvm::Triple::normalize(Core->TargetTriple));
+  if (!areCompatibleArchitectures(moduleTarget, ctx.LangOpts.Target) ||
+      !areCompatibleOSs(moduleTarget, ctx.LangOpts.Target)) {
+    status = Status::TargetIncompatible;
+    if (!recoverFromIncompatibility)
+      return error(status);
+  } else if (ctx.LangOpts.EnableTargetOSChecking && !M->isResilient() &&
+             isTargetTooNew(moduleTarget, ctx.LangOpts.Target)) {
+    status = Status::TargetTooNew;
+    if (!recoverFromIncompatibility)
+      return error(status);
+  }
+
+  StringRef SDKPath = ctx.SearchPathOpts.getSDKPath();
+  if (SDKPath.empty() ||
+      !Core->ModuleInputBuffer->getBufferIdentifier().startswith(SDKPath)) {
+    for (const auto &searchPath : Core->SearchPaths) {
+      ctx.addSearchPath(
+        ctx.SearchPathOpts.SearchPathRemapper.remapPath(searchPath.Path),
+        searchPath.IsFramework,
+        searchPath.IsSystem);
+    }
+  }
+
+  Status res = loadDependenciesForFileContext(file, diagLoc,
+                                            /*forTestable=*/false);
+  if (res != Status::Valid) return res;
+
   if (Core->Bits.HasEntryPoint) {
     FileContext->getParentModule()->registerEntryPointFile(FileContext,
                                                            SourceLoc(),

lib/Serialization/ModuleFile.h

@@ -649,6 +649,19 @@ public:
   Status associateWithFileContext(FileUnit *file, SourceLoc diagLoc,
                                   bool recoverFromIncompatibility);
 
+  /// Load dependencies of this module.
+  ///
+  /// \param file The FileUnit that represents this file's place in the AST.
+  /// \param diagLoc A location used for diagnostics that occur during loading.
+  /// This does not include diagnostics about \e this file failing to load,
+  /// but rather other things that might be imported as part of bringing the
+  /// file into the AST.
+  ///
+  /// \returns any error that occurred during loading dependencies.
+  Status
+  loadDependenciesForFileContext(const FileUnit *file, SourceLoc diagLoc,
+                               bool forTestable);
+
   /// How should \p dependency be loaded for a transitive import via \c this?
   ModuleLoadingBehavior
   getTransitiveLoadingBehavior(const Dependency &dependency) const;