[Modules] Change private modules rules and warnings

We used to advertise private modules to be declared as submodules
(Foo.Private). This has proven to not scale well since private headers
might carry several dependencies, introducing unwanted content into the
main module and often causing dep cycles.

Change the canonical way to name it to Foo_Private, forcing private
modules as top level ones, and provide warnings under -Wprivate-module
to suggest fixes for other private naming. Update documentation to
reflect that.

rdar://problem/31173501

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@321337 91177308-0d34-0410-b5e6-96231b3b80d8

25 files changed, 122 insertions, 29 deletions

diff --git a/test/Modules/Inputs/implicit-private-canonical/A.framework/Headers/a.h b/test/Modules/Inputs/implicit-private-canonical/A.framework/Headers/a.h
new file mode 100644
index 0000000000..8b4b198745
--- /dev/null
+++ b/test/Modules/Inputs/implicit-private-canonical/A.framework/Headers/a.h
@@ -0,0 +1 @@
+extern int APUBLIC;
diff --git a/test/Modules/Inputs/implicit-private-with-different-name/A.framework/Headers/aprivate.h b/test/Modules/Inputs/implicit-private-canonical/A.framework/Headers/aprivate.h
index 760d901aa3..760d901aa3 100644
--- a/test/Modules/Inputs/implicit-private-with-different-name/A.framework/Headers/aprivate.h
+++ b/test/Modules/Inputs/implicit-private-canonical/A.framework/Headers/aprivate.h
diff --git a/test/Modules/Inputs/implicit-private-canonical/A.framework/Modules/module.modulemap b/test/Modules/Inputs/implicit-private-canonical/A.framework/Modules/module.modulemap
new file mode 100644
index 0000000000..95eabf90a9
--- /dev/null
+++ b/test/Modules/Inputs/implicit-private-canonical/A.framework/Modules/module.modulemap
@@ -0,0 +1,4 @@
+framework module A {
+  header "a.h"
+  export *
+}
diff --git a/test/Modules/Inputs/implicit-private-canonical/A.framework/Modules/module.private.modulemap b/test/Modules/Inputs/implicit-private-canonical/A.framework/Modules/module.private.modulemap
new file mode 100644
index 0000000000..a7606f9c14
--- /dev/null
+++ b/test/Modules/Inputs/implicit-private-canonical/A.framework/Modules/module.private.modulemap
@@ -0,0 +1,4 @@
+framework module A_Private {
+  header "aprivate.h"
+  export *
+}
diff --git a/test/Modules/Inputs/implicit-private-canonical/A.framework/PrivateHeaders/aprivate.h b/test/Modules/Inputs/implicit-private-canonical/A.framework/PrivateHeaders/aprivate.h
new file mode 100644
index 0000000000..760d901aa3
--- /dev/null
+++ b/test/Modules/Inputs/implicit-private-canonical/A.framework/PrivateHeaders/aprivate.h
@@ -0,0 +1 @@
+extern int APRIVATE;
diff --git a/test/Modules/Inputs/implicit-private-with-different-name/A.framework/PrivateHeaders/aprivate.h b/test/Modules/Inputs/implicit-private-with-different-name/A.framework/PrivateHeaders/aprivate.h
new file mode 100644
index 0000000000..760d901aa3
--- /dev/null
+++ b/test/Modules/Inputs/implicit-private-with-different-name/A.framework/PrivateHeaders/aprivate.h
@@ -0,0 +1 @@
+extern int APRIVATE;
diff --git a/test/Modules/Inputs/implicit-private-with-submodule/A.framework/Headers/a.h b/test/Modules/Inputs/implicit-private-with-submodule/A.framework/Headers/a.h
new file mode 100644
index 0000000000..8b4b198745
--- /dev/null
+++ b/test/Modules/Inputs/implicit-private-with-submodule/A.framework/Headers/a.h
@@ -0,0 +1 @@
+extern int APUBLIC;
diff --git a/test/Modules/Inputs/implicit-private-with-submodule/A.framework/Headers/aprivate.h b/test/Modules/Inputs/implicit-private-with-submodule/A.framework/Headers/aprivate.h
new file mode 100644
index 0000000000..760d901aa3
--- /dev/null
+++ b/test/Modules/Inputs/implicit-private-with-submodule/A.framework/Headers/aprivate.h
@@ -0,0 +1 @@
+extern int APRIVATE;
diff --git a/test/Modules/Inputs/implicit-private-with-submodule/A.framework/Modules/module.modulemap b/test/Modules/Inputs/implicit-private-with-submodule/A.framework/Modules/module.modulemap
new file mode 100644
index 0000000000..95eabf90a9
--- /dev/null
+++ b/test/Modules/Inputs/implicit-private-with-submodule/A.framework/Modules/module.modulemap
@@ -0,0 +1,4 @@
+framework module A {
+  header "a.h"
+  export *
+}
diff --git a/test/Modules/Inputs/implicit-private-with-submodule/A.framework/Modules/module.private.modulemap b/test/Modules/Inputs/implicit-private-with-submodule/A.framework/Modules/module.private.modulemap
new file mode 100644
index 0000000000..40182969f4
--- /dev/null
+++ b/test/Modules/Inputs/implicit-private-with-submodule/A.framework/Modules/module.private.modulemap
@@ -0,0 +1,4 @@
+framework module A.Private {
+  header "aprivate.h"
+  export *
+}
diff --git a/test/Modules/Inputs/implicit-private-with-submodule/A.framework/PrivateHeaders/aprivate.h b/test/Modules/Inputs/implicit-private-with-submodule/A.framework/PrivateHeaders/aprivate.h
new file mode 100644
index 0000000000..760d901aa3
--- /dev/null
+++ b/test/Modules/Inputs/implicit-private-with-submodule/A.framework/PrivateHeaders/aprivate.h
@@ -0,0 +1 @@
+extern int APRIVATE;
diff --git a/test/Modules/add-remove-private.m b/test/Modules/add-remove-private.m
index dc73a096c8..5e7a5a966a 100644
--- a/test/Modules/add-remove-private.m
+++ b/test/Modules/add-remove-private.m
@@ -4,7 +4,7 @@
 // RUN: cp -r %S/Inputs/AddRemovePrivate.framework %t/AddRemovePrivate.framework
 
 // Build with module.private.modulemap
-// RUN: %clang_cc1 -fmodules -fimplicit-module-maps -fmodules-cache-path=%t.mcp -fdisable-module-hash -F %t %s -verify -DP
+// RUN: %clang_cc1 -fmodules -fimplicit-module-maps -fmodules-cache-path=%t.mcp -fdisable-module-hash -F %t %s -verify -DP -Wno-private-module
 // RUN: cp %t.mcp/AddRemovePrivate.pcm %t/with.pcm
 
 // Build without module.private.modulemap
@@ -17,7 +17,7 @@
 
 // Build with module.private.modulemap (again)
 // RUN: cp %S/Inputs/AddRemovePrivate.framework/Modules/module.private.modulemap %t/AddRemovePrivate.framework/Modules/module.private.modulemap
-// RUN: %clang_cc1 -fmodules -fimplicit-module-maps -fmodules-cache-path=%t.mcp -fdisable-module-hash -F %t %s -verify -DP
+// RUN: %clang_cc1 -fmodules -fimplicit-module-maps -fmodules-cache-path=%t.mcp -fdisable-module-hash -F %t %s -verify -DP -Wno-private-module
 // RUN: not diff %t.mcp/AddRemovePrivate.pcm %t/without.pcm
 
 // expected-no-diagnostics
diff --git a/test/Modules/auto-module-import.m b/test/Modules/auto-module-import.m
index 9a34c92eab..f6127adcbd 100644
--- a/test/Modules/auto-module-import.m
+++ b/test/Modules/auto-module-import.m
@@ -1,7 +1,7 @@
 // RUN: rm -rf %t
-// RUN: %clang_cc1 -Wauto-import -fmodules-cache-path=%t -fmodules -fimplicit-module-maps -F %S/Inputs %s -verify -DERRORS
-// RUN: %clang_cc1 -Wauto-import -fmodules-cache-path=%t -fmodules -fimplicit-module-maps -F %S/Inputs %s -verify
-// RUN: %clang_cc1 -Wauto-import -fmodules-cache-path=%t -fmodules -fimplicit-module-maps -F %S/Inputs -xobjective-c++ %s -verify
+// RUN: %clang_cc1 -Wauto-import -Wno-private-module -fmodules-cache-path=%t -fmodules -fimplicit-module-maps -F %S/Inputs %s -verify -DERRORS
+// RUN: %clang_cc1 -Wauto-import -Wno-private-module -fmodules-cache-path=%t -fmodules -fimplicit-module-maps -F %S/Inputs %s -verify
+// RUN: %clang_cc1 -Wauto-import -Wno-private-module -fmodules-cache-path=%t -fmodules -fimplicit-module-maps -F %S/Inputs -xobjective-c++ %s -verify
 // 
 // Test both with and without the declarations that refer to unimported
 // entities. For error recovery, those cases implicitly trigger an import.
diff --git a/test/Modules/global_index.m b/test/Modules/global_index.m
index 64a70f2a43..e94c69ac3c 100644
--- a/test/Modules/global_index.m
+++ b/test/Modules/global_index.m
@@ -1,12 +1,12 @@
 // RUN: rm -rf %t
 // Run without global module index
-// RUN: %clang_cc1 -Wauto-import -fmodules-cache-path=%t -fdisable-module-hash -fmodules -fimplicit-module-maps -fno-modules-global-index -F %S/Inputs %s -verify
+// RUN: %clang_cc1 -Wauto-import -Wno-private-module -fmodules-cache-path=%t -fdisable-module-hash -fmodules -fimplicit-module-maps -fno-modules-global-index -F %S/Inputs %s -verify
 // RUN: ls %t|not grep modules.idx
 // Run and create the global module index
-// RUN: %clang_cc1 -Wauto-import -fmodules-cache-path=%t -fdisable-module-hash -fmodules -fimplicit-module-maps -F %S/Inputs %s -verify
+// RUN: %clang_cc1 -Wauto-import -Wno-private-module -fmodules-cache-path=%t -fdisable-module-hash -fmodules -fimplicit-module-maps -F %S/Inputs %s -verify
 // RUN: ls %t|grep modules.idx
 // Run and use the global module index
-// RUN: %clang_cc1 -Wauto-import -fmodules-cache-path=%t -fdisable-module-hash -fmodules -fimplicit-module-maps -F %S/Inputs %s -verify -print-stats 2>&1 | FileCheck %s
+// RUN: %clang_cc1 -Wauto-import -Wno-private-module -fmodules-cache-path=%t -fdisable-module-hash -fmodules -fimplicit-module-maps -F %S/Inputs %s -verify -print-stats 2>&1 | FileCheck %s
 
 // expected-no-diagnostics
 @import DependsOnModule;
diff --git a/test/Modules/implicit-private-canonical.m b/test/Modules/implicit-private-canonical.m
new file mode 100644
index 0000000000..96b6c4a346
--- /dev/null
+++ b/test/Modules/implicit-private-canonical.m
@@ -0,0 +1,35 @@
+// RUN: rm -rf %t
+// Build PCH using A, with adjacent private module APrivate, which winds up being implicitly referenced
+// RUN: %clang_cc1 -verify -fmodules -fimplicit-module-maps -fmodules-cache-path=%t -F %S/Inputs/implicit-private-canonical -emit-pch -o %t-A.pch %s -Wprivate-module -DNO_AT_IMPORT
+// Use the PCH with no explicit way to resolve APrivate, still pick it up by automatic second-chance search for "A" with "Private" appended
+// RUN: %clang_cc1 -verify -fmodules -fimplicit-module-maps -fmodules-cache-path=%t -F %S/Inputs/implicit-private-canonical -include-pch %t-A.pch %s -fsyntax-only -Wprivate-module -DNO_AT_IMPORT
+
+// RUN: rm -rf %t
+// RUN: %clang_cc1 -verify -fmodules -fimplicit-module-maps -fmodules-cache-path=%t -F %S/Inputs/implicit-private-canonical -emit-pch -o %t-A.pch %s -Wprivate-module -DUSE_AT_IMPORT_PRIV
+// RUN: %clang_cc1 -verify -fmodules -fimplicit-module-maps -fmodules-cache-path=%t -F %S/Inputs/implicit-private-canonical -include-pch %t-A.pch %s -fsyntax-only -Wprivate-module -DUSE_AT_IMPORT_PRIV
+
+// RUN: rm -rf %t
+// RUN: %clang_cc1 -verify -fmodules -fimplicit-module-maps -fmodules-cache-path=%t -F %S/Inputs/implicit-private-canonical -emit-pch -o %t-A.pch %s -Wprivate-module -DUSE_AT_IMPORT_BOTH
+// RUN: %clang_cc1 -verify -fmodules -fimplicit-module-maps -fmodules-cache-path=%t -F %S/Inputs/implicit-private-canonical -include-pch %t-A.pch %s -fsyntax-only -Wprivate-module -DUSE_AT_IMPORT_BOTH
+
+// expected-no-diagnostics
+
+#ifndef HEADER
+#define HEADER
+
+#ifdef NO_AT_IMPORT
+#import "A/aprivate.h"
+#endif
+
+#ifdef USE_AT_IMPORT_PRIV
+@import A_Private;
+#endif
+
+#ifdef USE_AT_IMPORT_BOTH
+@import A;
+@import A_Private;
+#endif
+
+const int *y = &APRIVATE;
+
+#endif
diff --git a/test/Modules/implicit-private-with-different-name.m b/test/Modules/implicit-private-with-different-name.m
index c09d3979c3..7ee84539bf 100644
--- a/test/Modules/implicit-private-with-different-name.m
+++ b/test/Modules/implicit-private-with-different-name.m
@@ -1,17 +1,17 @@
 // RUN: rm -rf %t
 
 // Build PCH using A, with adjacent private module APrivate, which winds up being implicitly referenced
-// RUN: %clang_cc1 -verify -fmodules -fimplicit-module-maps -fmodules-cache-path=%t -F %S/Inputs/implicit-private-with-different-name -emit-pch -o %t-A.pch %s
+// RUN: %clang_cc1 -verify -fmodules -fimplicit-module-maps -fmodules-cache-path=%t -F %S/Inputs/implicit-private-with-different-name -emit-pch -o %t-A.pch %s -Wprivate-module
 
 // Use the PCH with no explicit way to resolve APrivate, still pick it up by automatic second-chance search for "A" with "Private" appended
-// RUN: %clang_cc1 -verify -fmodules -fimplicit-module-maps -fmodules-cache-path=%t -F %S/Inputs/implicit-private-with-different-name -include-pch %t-A.pch %s -fsyntax-only
+// RUN: %clang_cc1 -verify -fmodules -fimplicit-module-maps -fmodules-cache-path=%t -F %S/Inputs/implicit-private-with-different-name -include-pch %t-A.pch %s -fsyntax-only -Wprivate-module
 
 // Check the fixit
-// RUN: %clang_cc1  -fmodules -fimplicit-module-maps -fmodules-cache-path=%t -F %S/Inputs/implicit-private-with-different-name -include-pch %t-A.pch %s -fsyntax-only -fdiagnostics-parseable-fixits %s 2>&1 | FileCheck %s
+// RUN: %clang_cc1 -fmodules -fimplicit-module-maps -fmodules-cache-path=%t -F %S/Inputs/implicit-private-with-different-name -include-pch %t-A.pch %s -fsyntax-only -fdiagnostics-parseable-fixits -Wprivate-module %s 2>&1 | FileCheck %s
 
-// expected-warning@Inputs/implicit-private-with-different-name/A.framework/Modules/module.private.modulemap:1{{top-level module 'APrivate' in private module map, expected a submodule of 'A'}}
-// expected-note@Inputs/implicit-private-with-different-name/A.framework/Modules/module.private.modulemap:1{{make 'APrivate' a submodule of 'A' to ensure it can be found by name}}
-// CHECK: fix-it:"{{.*}}module.private.modulemap":{1:18-1:26}:"A.Private"
+// expected-warning@Inputs/implicit-private-with-different-name/A.framework/Modules/module.private.modulemap:1{{expected canonical name for private module 'APrivate'}}
+// expected-note@Inputs/implicit-private-with-different-name/A.framework/Modules/module.private.modulemap:1{{rename 'APrivate' to ensure it can be found by name}}
+// CHECK: fix-it:"{{.*}}module.private.modulemap":{1:18-1:26}:"A_Private"
 
 #ifndef HEADER
 #define HEADER
diff --git a/test/Modules/implicit-private-with-submodule.m b/test/Modules/implicit-private-with-submodule.m
new file mode 100644
index 0000000000..1779341a5f
--- /dev/null
+++ b/test/Modules/implicit-private-with-submodule.m
@@ -0,0 +1,36 @@
+// RUN: rm -rf %t
+// Build PCH using A, with private submodule A.Private
+// RUN: %clang_cc1 -verify -fmodules -fimplicit-module-maps -fmodules-cache-path=%t -F %S/Inputs/implicit-private-with-submodule -emit-pch -o %t-A.pch %s -DNO_AT_IMPORT
+
+// RUN: rm -rf %t
+// Build PCH using A, with private submodule A.Private, check the fixit
+// RUN: %clang_cc1 -fmodules -fimplicit-module-maps -fmodules-cache-path=%t -F %S/Inputs/implicit-private-with-submodule -emit-pch -o %t-A.pch %s -fdiagnostics-parseable-fixits -DNO_AT_IMPORT 2>&1 | FileCheck %s
+
+// RUN: rm -rf %t
+// RUN: %clang_cc1 -verify -fmodules -fimplicit-module-maps -fmodules-cache-path=%t -F %S/Inputs/implicit-private-with-submodule -emit-pch -o %t-A.pch %s -DUSE_AT_IMPORT_PRIV
+// RUN: rm -rf %t
+// RUN: %clang_cc1 -verify -fmodules -fimplicit-module-maps -fmodules-cache-path=%t -F %S/Inputs/implicit-private-with-submodule -emit-pch -o %t-A.pch %s -DUSE_AT_IMPORT_BOTH
+
+// expected-warning@Inputs/implicit-private-with-submodule/A.framework/Modules/module.private.modulemap:1{{private submodule 'A.Private' in private module map, expected top-level module}}
+// expected-note@Inputs/implicit-private-with-submodule/A.framework/Modules/module.private.modulemap:1{{rename 'A.Private' to ensure it can be found by name}}
+// CHECK: fix-it:"{{.*}}module.private.modulemap":{1:20-1:27}:"A_Private"
+
+#ifndef HEADER
+#define HEADER
+
+#ifdef NO_AT_IMPORT
+#import "A/aprivate.h"
+#endif
+
+#ifdef USE_AT_IMPORT_PRIV
+@import A.Private;
+#endif
+
+#ifdef USE_AT_IMPORT_BOTH
+@import A;
+@import A.Private;
+#endif
+
+const int *y = &APRIVATE;
+
+#endif
diff --git a/test/Modules/modulemap-locations.m b/test/Modules/modulemap-locations.m
index 3c80db582d..c99bb14dc7 100644
--- a/test/Modules/modulemap-locations.m
+++ b/test/Modules/modulemap-locations.m
@@ -1,5 +1,5 @@
 // RUN: rm -rf %t 
-// RUN: %clang_cc1 -fmodules -fimplicit-module-maps -fmodules-cache-path=%t -I %S/Inputs/ModuleMapLocations/Module_ModuleMap -I %S/Inputs/ModuleMapLocations/Both -F %S/Inputs/ModuleMapLocations -I %S/Inputs/ModuleMapLocations -F %S/Inputs -x objective-c -fsyntax-only %s -verify
+// RUN: %clang_cc1 -fmodules -fimplicit-module-maps -fmodules-cache-path=%t -I %S/Inputs/ModuleMapLocations/Module_ModuleMap -I %S/Inputs/ModuleMapLocations/Both -F %S/Inputs/ModuleMapLocations -I %S/Inputs/ModuleMapLocations -F %S/Inputs -x objective-c -fsyntax-only %s -verify -Wno-private-module
 
 // regular
 @import module_modulemap;
diff --git a/test/Modules/prune.m b/test/Modules/prune.m
index 58992f9c00..97a2fd7d0d 100644
--- a/test/Modules/prune.m
+++ b/test/Modules/prune.m
@@ -8,8 +8,8 @@
 // Clear out the module cache
 // RUN: rm -rf %t
 // Run Clang twice so we end up creating the timestamp file (the second time).
-// RUN: %clang_cc1 -DIMPORT_DEPENDS_ON_MODULE -fmodules-ignore-macro=DIMPORT_DEPENDS_ON_MODULE -fmodules -fimplicit-module-maps -F %S/Inputs -fmodules-cache-path=%t %s -verify
-// RUN: %clang_cc1 -DIMPORT_DEPENDS_ON_MODULE -fmodules-ignore-macro=DIMPORT_DEPENDS_ON_MODULE -fmodules -fimplicit-module-maps -F %S/Inputs -fmodules-cache-path=%t %s -verify
+// RUN: %clang_cc1 -DIMPORT_DEPENDS_ON_MODULE -Wno-private-module -fmodules-ignore-macro=DIMPORT_DEPENDS_ON_MODULE -fmodules -fimplicit-module-maps -F %S/Inputs -fmodules-cache-path=%t %s -verify
+// RUN: %clang_cc1 -DIMPORT_DEPENDS_ON_MODULE -Wno-private-module -fmodules-ignore-macro=DIMPORT_DEPENDS_ON_MODULE -fmodules -fimplicit-module-maps -F %S/Inputs -fmodules-cache-path=%t %s -verify
 // RUN: ls %t | grep modules.timestamp
 // RUN: ls -R %t | grep ^Module.*pcm
 // RUN: ls -R %t | grep DependsOnModule.*pcm
@@ -17,7 +17,7 @@
 // Set the timestamp back more than two days. We should try to prune,
 // but nothing gets pruned because the module files are new enough.
 // RUN: touch -m -a -t 201101010000 %t/modules.timestamp 
-// RUN: %clang_cc1 -fmodules -fimplicit-module-maps -F %S/Inputs -fmodules-cache-path=%t -fmodules -fmodules-prune-interval=172800 -fmodules-prune-after=345600 %s -verify
+// RUN: %clang_cc1 -fmodules -fimplicit-module-maps -Wno-private-module -F %S/Inputs -fmodules-cache-path=%t -fmodules -fmodules-prune-interval=172800 -fmodules-prune-after=345600 %s -verify
 // RUN: ls %t | grep modules.timestamp
 // RUN: ls -R %t | grep ^Module.*pcm
 // RUN: ls -R %t | grep DependsOnModule.*pcm
@@ -26,7 +26,7 @@
 // This shouldn't prune anything, because the timestamp has been updated, so
 // the pruning mechanism won't fire.
 // RUN: find %t -name DependsOnModule*.pcm | sed -e 's/\\/\//g' | xargs touch -a -t 201101010000
-// RUN: %clang_cc1 -fmodules -fimplicit-module-maps -F %S/Inputs -fmodules-cache-path=%t -fmodules -fmodules-prune-interval=172800 -fmodules-prune-after=345600 %s -verify
+// RUN: %clang_cc1 -fmodules -fimplicit-module-maps -F %S/Inputs -Wno-private-module -fmodules-cache-path=%t -fmodules -fmodules-prune-interval=172800 -fmodules-prune-after=345600 %s -verify
 // RUN: ls %t | grep modules.timestamp
 // RUN: ls -R %t | grep ^Module.*pcm
 // RUN: ls -R %t | grep DependsOnModule.*pcm
@@ -35,7 +35,7 @@
 // This should trigger pruning, which will remove DependsOnModule but not Module.
 // RUN: touch -m -a -t 201101010000 %t/modules.timestamp 
 // RUN: find %t -name DependsOnModule*.pcm | sed -e 's/\\/\//g' | xargs touch -a -t 201101010000
-// RUN: %clang_cc1 -fmodules -fimplicit-module-maps -F %S/Inputs -fmodules-cache-path=%t -fmodules -fmodules-prune-interval=172800 -fmodules-prune-after=345600 %s -verify
+// RUN: %clang_cc1 -fmodules -fimplicit-module-maps -F %S/Inputs -Wno-private-module -fmodules-cache-path=%t -fmodules -fmodules-prune-interval=172800 -fmodules-prune-after=345600 %s -verify
 // RUN: ls %t | grep modules.timestamp
 // RUN: ls -R %t | grep ^Module.*pcm
 // RUN: ls -R %t | not grep DependsOnModule.*pcm
diff --git a/test/Modules/redefinition-c-tagtypes.m b/test/Modules/redefinition-c-tagtypes.m
index a01f11bd74..eb469e00e1 100644
--- a/test/Modules/redefinition-c-tagtypes.m
+++ b/test/Modules/redefinition-c-tagtypes.m
@@ -1,8 +1,8 @@
 // RUN: rm -rf %t.cache
 // RUN: %clang_cc1 -fsyntax-only %s -fmodules -fmodules-cache-path=%t.cache \
-// RUN:   -fimplicit-module-maps -F%S/Inputs -verify
+// RUN:   -fimplicit-module-maps -Wno-private-module -F%S/Inputs -verify
 // RUN: %clang_cc1 -fsyntax-only %s -fmodules -fmodules-cache-path=%t.cache \
-// RUN:   -fimplicit-module-maps -F%S/Inputs -DCHANGE_TAGS -verify
+// RUN:   -fimplicit-module-maps -Wno-private-module -F%S/Inputs -DCHANGE_TAGS -verify
 #include "F/F.h"
 
 #ifndef CHANGE_TAGS
diff --git a/test/Modules/requires-coroutines.mm b/test/Modules/requires-coroutines.mm
index 8e25a3c575..4e9c9d19cd 100644
--- a/test/Modules/requires-coroutines.mm
+++ b/test/Modules/requires-coroutines.mm
@@ -1,6 +1,6 @@
 // RUN: rm -rf %t
-// RUN: %clang_cc1 -fmodules-cache-path=%t -fmodules -fimplicit-module-maps -F %S/Inputs -I %S/Inputs/DependsOnModule.framework %s -verify
-// RUN: %clang_cc1 -fmodules-cache-path=%t -fmodules -fimplicit-module-maps -F %S/Inputs -I %S/Inputs/DependsOnModule.framework %s -verify -fcoroutines-ts -DCOROUTINES
+// RUN: %clang_cc1 -fmodules-cache-path=%t -fmodules -fimplicit-module-maps -Wno-private-module -F %S/Inputs -I %S/Inputs/DependsOnModule.framework %s -verify
+// RUN: %clang_cc1 -fmodules-cache-path=%t -fmodules -fimplicit-module-maps -Wno-private-module -F %S/Inputs -I %S/Inputs/DependsOnModule.framework %s -verify -fcoroutines-ts -DCOROUTINES
 
 #ifdef COROUTINES
 @import DependsOnModule.Coroutines;
diff --git a/test/Modules/requires.m b/test/Modules/requires.m
index d61de6bd48..4a83d0c2b0 100644
--- a/test/Modules/requires.m
+++ b/test/Modules/requires.m
@@ -1,5 +1,5 @@
 // RUN: rm -rf %t
-// RUN: %clang_cc1 -Wauto-import -fmodules-cache-path=%t -fmodules -fimplicit-module-maps -F %S/Inputs -I %S/Inputs %s -verify -fmodule-feature custom_req1
+// RUN: %clang_cc1 -Wauto-import -Wno-private-module -fmodules-cache-path=%t -fmodules -fimplicit-module-maps -F %S/Inputs -I %S/Inputs %s -verify -fmodule-feature custom_req1
 
 // expected-error@DependsOnModule.framework/module.map:7 {{module 'DependsOnModule.CXX' requires feature 'cplusplus'}}
 @import DependsOnModule.CXX; // expected-note {{module imported here}}
diff --git a/test/Modules/requires.mm b/test/Modules/requires.mm
index f90622ece8..b4237cbd78 100644
--- a/test/Modules/requires.mm
+++ b/test/Modules/requires.mm
@@ -1,5 +1,5 @@
 // RUN: rm -rf %t
-// RUN: %clang_cc1 -Wauto-import -fmodules-cache-path=%t -fmodules -fimplicit-module-maps -F %S/Inputs -I %S/Inputs/DependsOnModule.framework %s -verify
+// RUN: %clang_cc1 -Wauto-import -Wno-private-module -fmodules-cache-path=%t -fmodules -fimplicit-module-maps -F %S/Inputs -I %S/Inputs/DependsOnModule.framework %s -verify
 
 @import DependsOnModule.CXX;
 // expected-error@module.map:11 {{module 'DependsOnModule.NotCXX' is incompatible with feature 'cplusplus'}}
diff --git a/test/Modules/subframework-from-intermediate-path.m b/test/Modules/subframework-from-intermediate-path.m
index 394cc45f2f..1543861ec4 100644
--- a/test/Modules/subframework-from-intermediate-path.m
+++ b/test/Modules/subframework-from-intermediate-path.m
@@ -1,5 +1,5 @@
 // RUN: rm -rf %t
-// RUN: %clang_cc1 -fmodules-cache-path=%t -fmodules -fimplicit-module-maps -F %S/Inputs -F %S/Inputs/DependsOnModule.framework/Frameworks %s -verify
+// RUN: %clang_cc1 -Wno-private-module -fmodules-cache-path=%t -fmodules -fimplicit-module-maps -F %S/Inputs -F %S/Inputs/DependsOnModule.framework/Frameworks %s -verify
 
 @import DependsOnModule;
 @import SubFramework; // expected-error{{module 'SubFramework' not found}}
diff --git a/test/Modules/subframeworks.m b/test/Modules/subframeworks.m
index 21081843d7..ce35415717 100644
--- a/test/Modules/subframeworks.m
+++ b/test/Modules/subframeworks.m
@@ -1,6 +1,6 @@
 // RUN: rm -rf %t
-// RUN: %clang_cc1 -Wauto-import -fmodules-cache-path=%t -fmodules -fimplicit-module-maps -F %S/Inputs -F %S/Inputs/DependsOnModule.framework/Frameworks %s -verify
-// RUN: %clang_cc1 -x objective-c++ -Wauto-import -fmodules-cache-path=%t -fmodules -fimplicit-module-maps -F %S/Inputs -F %S/Inputs/DependsOnModule.framework/Frameworks %s -verify
+// RUN: %clang_cc1 -Wauto-import -Wno-private-module -fmodules-cache-path=%t -fmodules -fimplicit-module-maps -F %S/Inputs -F %S/Inputs/DependsOnModule.framework/Frameworks %s -verify
+// RUN: %clang_cc1 -x objective-c++ -Wauto-import -Wno-private-module -fmodules-cache-path=%t -fmodules -fimplicit-module-maps -F %S/Inputs -F %S/Inputs/DependsOnModule.framework/Frameworks %s -verify
 
 @import DependsOnModule;