[APINotes] Do not require spelling out inline namespaces

rdar://113403829

Author: egorzhdan

clang/lib/Sema/SemaAPINotes.cpp

@@ -824,7 +824,8 @@ void Sema::ProcessAPINotes(Decl *D) {
         {
           auto CurrentNamespace = NamespaceContext;
           while (CurrentNamespace) {
-            NamespaceStack.push(CurrentNamespace);
+            if (!CurrentNamespace->isInlineNamespace())
+              NamespaceStack.push(CurrentNamespace);
             CurrentNamespace =
                 dyn_cast<NamespaceDecl>(CurrentNamespace->getParent());
           }

clang/test/APINotes/Inputs/Headers/Namespaces.apinotes

@@ -1,8 +1,13 @@
 ---
 Name: Namespaces
+Globals:
+  - Name: varInInlineNamespace
+    SwiftName: swiftVarInInlineNamespace
 Functions:
   - Name: funcInNamespace
     SwiftName: inWrongContext()
+  - Name: funcInInlineNamespace
+    SwiftName: swiftFuncInInlineNamespace()
 Tags:
   - Name: char_box
     SwiftName: InWrongContext
@@ -42,3 +47,7 @@ Namespaces:
         Globals:
           - Name: varInNestedNamespace
             SwiftName: swiftAnotherVarInNestedNamespace
+  - Name: InlineNamespace1
+    Functions:
+      - Name: funcInInlineNamespace
+        SwiftName: shouldNotSpellOutInlineNamespaces()

clang/test/APINotes/Inputs/Headers/Namespaces.h

@@ -32,3 +32,8 @@ namespace Namespace1 {
 typedef int my_typedef;
 using my_using_decl = int;
 }
+
+inline namespace InlineNamespace1 {
+static int varInInlineNamespace = 3;
+void funcInInlineNamespace();
+}

clang/test/APINotes/namespaces.cpp

@@ -10,6 +10,8 @@
 // RUN: %clang_cc1 -fmodules -fblocks -fimplicit-module-maps -fmodules-cache-path=%t/ModulesCache/CxxInterop -fdisable-module-hash -fapinotes-modules -fsyntax-only -I %S/Inputs/Headers -F %S/Inputs/Frameworks %s -ast-dump -ast-dump-filter Namespace1::Nested1::char_box -x objective-c++ | FileCheck -check-prefix=CHECK-STRUCT-IN-NESTED-NAMESPACE %s
 // RUN: %clang_cc1 -fmodules -fblocks -fimplicit-module-maps -fmodules-cache-path=%t/ModulesCache/CxxInterop -fdisable-module-hash -fapinotes-modules -fsyntax-only -I %S/Inputs/Headers -F %S/Inputs/Frameworks %s -ast-dump -ast-dump-filter Namespace1::Nested1::funcInNestedNamespace -x objective-c++ | FileCheck -check-prefix=CHECK-FUNC-IN-NESTED-NAMESPACE %s
 // RUN: %clang_cc1 -fmodules -fblocks -fimplicit-module-maps -fmodules-cache-path=%t/ModulesCache/CxxInterop -fdisable-module-hash -fapinotes-modules -fsyntax-only -I %S/Inputs/Headers -F %S/Inputs/Frameworks %s -ast-dump -ast-dump-filter Namespace1::Nested1::Namespace1::char_box -x objective-c++ | FileCheck -check-prefix=CHECK-STRUCT-IN-DEEP-NESTED-NAMESPACE %s
+// RUN: %clang_cc1 -fmodules -fblocks -fimplicit-module-maps -fmodules-cache-path=%t/ModulesCache/CxxInterop -fdisable-module-hash -fapinotes-modules -fsyntax-only -I %S/Inputs/Headers -F %S/Inputs/Frameworks %s -ast-dump -ast-dump-filter varInInlineNamespace -x objective-c++ | FileCheck -check-prefix=CHECK-GLOBAL-IN-INLINE-NAMESPACE %s
+// RUN: %clang_cc1 -fmodules -fblocks -fimplicit-module-maps -fmodules-cache-path=%t/ModulesCache/CxxInterop -fdisable-module-hash -fapinotes-modules -fsyntax-only -I %S/Inputs/Headers -F %S/Inputs/Frameworks %s -ast-dump -ast-dump-filter funcInInlineNamespace -x objective-c++ | FileCheck -check-prefix=CHECK-FUNC-IN-INLINE-NAMESPACE %s
 
 #import <Namespaces.h>
 
@@ -56,3 +58,12 @@
 // CHECK-STRUCT-IN-DEEP-NESTED-NAMESPACE: Dumping Namespace1::Nested1::Namespace1::char_box:
 // CHECK-STRUCT-IN-DEEP-NESTED-NAMESPACE-NEXT: CXXRecordDecl {{.+}} imported in Namespaces <undeserialized declarations> struct char_box
 // CHECK-STRUCT-IN-DEEP-NESTED-NAMESPACE: SwiftNameAttr {{.+}} <<invalid sloc>> "DeepNestedCharBox"
+
+// CHECK-GLOBAL-IN-INLINE-NAMESPACE: Dumping varInInlineNamespace:
+// CHECK-GLOBAL-IN-INLINE-NAMESPACE-NEXT: VarDecl {{.+}} imported in Namespaces varInInlineNamespace 'int' static cinit
+// CHECK-GLOBAL-IN-INLINE-NAMESPACE-NEXT: IntegerLiteral {{.+}} 'int' 3
+// CHECK-GLOBAL-IN-INLINE-NAMESPACE-NEXT: SwiftNameAttr {{.+}} <<invalid sloc>> "swiftVarInInlineNamespace"
+
+// CHECK-FUNC-IN-INLINE-NAMESPACE: Dumping funcInInlineNamespace:
+// CHECK-FUNC-IN-INLINE-NAMESPACE-NEXT: FunctionDecl {{.+}} imported in Namespaces funcInInlineNamespace 'void ()'
+// CHECK-FUNC-IN-INLINE-NAMESPACE-NEXT: SwiftNameAttr {{.+}} <<invalid sloc>> "swiftFuncInInlineNamespace()"