ABIChecker: include module name explicitly in generated ABI baseline. NFC

include/swift/APIDigester/ModuleAnalyzerNodes.h

@@ -438,7 +438,7 @@ class SDKNodeRoot: public SDKNode {
   uint8_t JsonFormatVer;
 public:
   SDKNodeRoot(SDKNodeInitInfo Info);
-  static SDKNode *getInstance(SDKContext &Ctx);
+  static SDKNode *getInstance(SDKContext &Ctx, ArrayRef<ModuleDecl*> modules);
   static bool classof(const SDKNode *N);
   void registerDescendant(SDKNode *D);
   virtual void jsonize(json::Output &Out) override;
@@ -777,8 +777,7 @@ class SwiftDeclCollector: public VisibleDeclConsumer {
   void visitAllRoots(SDKNodeVisitor &Visitor) {
     SDKNode::preorderVisit(RootNode, Visitor);
   }
-  SwiftDeclCollector(SDKContext &Ctx) : Ctx(Ctx),
-    RootNode(SDKNodeRoot::getInstance(Ctx)) {}
+  SwiftDeclCollector(SDKContext &Ctx, ArrayRef<ModuleDecl*> modules = {});
 
   // Construct all roots vector from a given file where a forest was
   // previously dumped.
@@ -818,8 +817,6 @@ class SwiftDeclCollector: public VisibleDeclConsumer {
   void foundDecl(ValueDecl *VD, DeclVisibilityKind Reason,
                  DynamicLookupInfo dynamicLookupInfo = {}) override;
   void processDecl(Decl *D);
-public:
-  void lookupVisibleDecls(ArrayRef<ModuleDecl *> Modules);
 };
 
 void detectRename(SDKNode *L, SDKNode *R);

lib/APIDigester/ModuleAnalyzerNodes.cpp

@@ -428,10 +428,17 @@ StringRef SDKNodeType::getTypeRoleDescription() const {
   llvm_unreachable("Unhandled SDKNodeKind in switch");
 }
 
-SDKNode *SDKNodeRoot::getInstance(SDKContext &Ctx) {
+SDKNode *SDKNodeRoot::getInstance(SDKContext &Ctx, ArrayRef<ModuleDecl*> modules) {
   SDKNodeInitInfo Info(Ctx);
-  Info.Name = Ctx.buffer("TopLevel");
-  Info.PrintedName = Ctx.buffer("TopLevel");
+  StringRef name = Ctx.buffer("NO_MODULE");
+  if (modules.size() == 1) {
+    // use the module name
+    name = Ctx.buffer(modules[0]->getName().str());
+  } else if (!modules.empty()) {
+    name = Ctx.buffer("MULTI_MODULES");
+  }
+  Info.Name = name;
+  Info.PrintedName = name;
   llvm::transform(Ctx.getOpts().ToolArgs, std::back_inserter(Info.ToolArgs),
                   [&](std::string s) { return Ctx.buffer(s); });
   Info.JsonFormatVer = DIGESTER_JSON_VERSION;
@@ -1976,8 +1983,13 @@ void SwiftDeclCollector::printTopLevelNames() {
     llvm::outs() << Node->getKind() << ": " << Node->getName() << '\n';
   }
 }
-
-void SwiftDeclCollector::lookupVisibleDecls(ArrayRef<ModuleDecl *> Modules) {
+SwiftDeclCollector::SwiftDeclCollector(SDKContext &Ctx,
+                                       ArrayRef<ModuleDecl*> Modules) : Ctx(Ctx),
+    RootNode(SDKNodeRoot::getInstance(Ctx, Modules)) {
+  if (Modules.empty()) {
+    return;
+  }
+  assert(!Modules.empty());
   for (auto M: Modules) {
     llvm::SmallVector<Decl*, 512> Decls;
     swift::getTopLevelDeclsForDisplay(M, Decls);
@@ -2544,8 +2556,7 @@ swift::ide::api::getSDKNodeRoot(SDKContext &SDKCtx,
   if (Opts.Verbose)
     llvm::errs() << "Scanning symbols...\n";
 
-  SwiftDeclCollector Collector(SDKCtx);
-  Collector.lookupVisibleDecls(Modules);
+  SwiftDeclCollector Collector(SDKCtx, Modules);
   return Collector.getSDKRoot();
 }
 
@@ -2603,7 +2614,11 @@ void swift::ide::api::dumpModuleContent(ModuleDecl *MD, llvm::raw_ostream &os,
   opts.SkipRemoveDeprecatedCheck = false;
   opts.Verbose = false;
   SDKContext ctx(opts);
-  SwiftDeclCollector collector(ctx);
+  llvm::SmallVector<ModuleDecl*, 4> modules;
+  if (!Empty) {
+    modules.push_back(MD);
+  }
+  SwiftDeclCollector collector(ctx, modules);
   ConstExtractor extractor(ctx, MD->getASTContext());
   PayLoad payload;
   SWIFT_DEFER {
@@ -2613,7 +2628,6 @@ void swift::ide::api::dumpModuleContent(ModuleDecl *MD, llvm::raw_ostream &os,
   if (Empty) {
     return;
   }
-  collector.lookupVisibleDecls({MD});
   extractor.extract(MD);
 }
 

test/ModuleInterface/emit-abi-descriptor.swift

@@ -26,6 +26,6 @@
 // RUN: %FileCheck %s < %t/Foo-c.json
 
 // CHECK: "kind": "Root"
-// CHECK-NEXT: "name": "TopLevel"
-// CHECK-NEXT: "printedName": "TopLevel"
+// CHECK-NEXT: "name":
+// CHECK-NEXT: "printedName":
 // CHECK: "kind": "Function"

test/api-digester/Outputs/cake-abi.json

@@ -1,8 +1,8 @@
 {
   "ABIRoot": {
     "kind": "Root",
-    "name": "TopLevel",
-    "printedName": "TopLevel",
+    "name": "cake",
+    "printedName": "cake",
     "children": [
       {
         "kind": "Import",

test/api-digester/Outputs/cake.json

@@ -1,8 +1,8 @@
 {
   "ABIRoot": {
     "kind": "Root",
-    "name": "TopLevel",
-    "printedName": "TopLevel",
+    "name": "cake",
+    "printedName": "cake",
     "children": [
       {
         "kind": "Import",

test/api-digester/Outputs/empty-baseline.json

@@ -1,8 +1,8 @@
 {
   "ABIRoot": {
     "kind": "Root",
-    "name": "TopLevel",
-    "printedName": "TopLevel",
+    "name": "NO_MODULE",
+    "printedName": "NO_MODULE",
     "json_format_version": 8
   }
 }