DNM: check what the frontend is doing for some tests

Author: finagolfin

test/Serialization/module_defining_interface.swift

@@ -2,7 +2,6 @@
 // RUN: %empty-directory(%t/inputs)
 // RUN: %empty-directory(%t/test-sdk)
 // RUN: %empty-directory(%t/test-sdk/usr/lib/swift)
-// RUN: cp -r %platform-module-dir/Swift.swiftmodule %t/test-sdk/usr/lib/swift/Swift.swiftmodule
 
 // RUN: %empty-directory(%t/test-sdk/usr/lib/Foo.swiftmodule)
 // RUN: split-file %s %t

test/Serialization/module_defining_interface_client.swift

@@ -6,7 +6,6 @@
 // RUN: %empty-directory(%t/test-sdk/usr/lib/Bar.swiftmodule)
 // RUN: %empty-directory(%t/test-sdk/usr/lib/_Foo_Bar.swiftmodule)
 // RUN: %empty-directory(%t/test-sdk/usr/lib/Foo.swiftcrossimport)
-// RUN: cp -r %platform-module-dir/Swift.swiftmodule %t/test-sdk/usr/lib/swift/Swift.swiftmodule
 
 // RUN: split-file %s %t
 

test/Serialization/runtime-import-from-sdk.swift

@@ -29,14 +29,14 @@
 // we should fall back to the SDK.
 
 // RUN: %empty-directory(%t/mcp)
-// RUN: %target-swift-frontend(mock-sdk: -sdk %t/good-sdk) -resource-dir %t/empty-toolchain/usr/lib/swift -module-cache-path %t/mcp -typecheck -verify -disable-implicit-concurrency-module-import -disable-implicit-string-processing-module-import %s
+// RUN: %target-swift-frontend(mock-sdk: -sdk %t/good-sdk) -Xcc -v -resource-dir %t/empty-toolchain/usr/lib/swift -module-cache-path %t/mcp -typecheck -verify -disable-implicit-concurrency-module-import -disable-implicit-string-processing-module-import %s
 
 // If the compiler's resource directory *does* contain a runtime swiftmodule, we
 // should *not* use the one in the SDK. (We assume that the resource directory
 // built with this compiler does contain a standard library.)
 
 // RUN: %empty-directory(%t/mcp)
-// RUN: %target-swift-frontend(mock-sdk: -sdk %t/bad-sdk) -module-cache-path %t/mcp -typecheck -verify -disable-implicit-concurrency-module-import -disable-implicit-string-processing-module-import %s
+// RUN: %target-swift-frontend(mock-sdk: -sdk %t/bad-sdk) -Xcc -v -module-cache-path %t/mcp -typecheck -verify -disable-implicit-concurrency-module-import -disable-implicit-string-processing-module-import %s
 
 // If neither the resource directory nor the SDK contains a runtime swiftmodule,
 // loading should fail. This just proves that we aren't getting runtime imports
@@ -48,18 +48,17 @@
 // FIXME: We can't properly test this on a non-Darwin platform because we'll get
 // the same error message for "unloadable standard library" and "no standard
 // library" (https://github.com/apple/swift/issues/52499).
-// REQUIRES: objc_interop
 
 // RUN: %empty-directory(%t/mcp)
-// RUN: not %target-swift-frontend(mock-sdk: -sdk %t/bad-sdk) -resource-dir %t/empty-toolchain/usr/lib/swift -module-cache-path %t/mcp -typecheck %s -dump-clang-diagnostics -disable-implicit-concurrency-module-import -disable-implicit-string-processing-module-import 2>&1 | %FileCheck --check-prefix CHECK-EMPTY %s
+// RUN: not %target-swift-frontend(mock-sdk: -sdk %t/bad-sdk) -Xcc -v -resource-dir %t/empty-toolchain/usr/lib/swift -module-cache-path %t/mcp -typecheck %s -dump-clang-diagnostics -disable-implicit-concurrency-module-import -disable-implicit-string-processing-module-import 2>&1 | %FileCheck --check-prefix CHECK-EMPTY %s
 // CHECK-EMPTY-NOT: '-isystem' '{{.*}}/bad-sdk/usr/lib/swift/shims'
 // CHECK-EMPTY: error: could not find module 'Swift' for target '{{.*}}'; found: garbage-garbage-garbage, at: {{.*}}/Swift.swiftmodule
 
 // Check that, when the toolchain *doesn't* have SwiftShims in it, ClagImporter
 // *does* add a -I flag to look in the SDK.
 
 // RUN: %empty-directory(%t/mcp)
-// RUN: not %target-swift-frontend(mock-sdk: -sdk %t/bad-sdk) -resource-dir %t/really-empty-toolchain/usr/lib/swift -module-cache-path %t/mcp -typecheck %s -dump-clang-diagnostics -disable-implicit-concurrency-module-import -disable-implicit-string-processing-module-import 2>&1 | %FileCheck --check-prefix CHECK-REALLY-EMPTY %s
+// RUN: not %target-swift-frontend(mock-sdk: -sdk %t/bad-sdk) -Xcc -v -resource-dir %t/really-empty-toolchain/usr/lib/swift -module-cache-path %t/mcp -typecheck %s -dump-clang-diagnostics -disable-implicit-concurrency-module-import -disable-implicit-string-processing-module-import 2>&1 | %FileCheck --check-prefix CHECK-REALLY-EMPTY %s
 // CHECK-REALLY-EMPTY: '-isystem' '{{.*}}/bad-sdk/usr/lib/swift/shims'
 // CHECK-REALLY-EMPTY: error: could not find module 'Swift' for target '{{.*}}'; found: garbage-garbage-garbage, at: {{.*}}/Swift.swiftmodule