Expose SPI to get type descriptor for Bundle(for:)

Author: millenomi

include/swift/Runtime/Metadata.h

@@ -4377,6 +4377,14 @@ void swift_getFieldAt(
 void verifyMangledNameRoundtrip(const Metadata *metadata);
 #endif
 
+#if !SWIFT_OBJC_INTEROP
+
+SWIFT_CC(swift) SWIFT_RUNTIME_STDLIB_SPI // SPI for swift-corelibs-foundation
+ConstTargetMetadataPointer<swift::InProcess, TargetTypeContextDescriptor>
+_swift_getTypeContextDescriptor(const Metadata *type);
+
+#endif // !SWIFT_OBJC_INTEROP
+
 } // end namespace swift
 
 #pragma clang diagnostic pop

stdlib/public/runtime/Metadata.cpp

@@ -3940,3 +3940,13 @@ void swift::verifyMangledNameRoundtrip(const Metadata *metadata) {
                    metadata, mangledName.c_str(), (const Metadata *)result);
 }
 #endif
+
+#if !SWIFT_OBJC_INTEROP
+
+// SPI for swift-corelibs-foundation
+ConstTargetMetadataPointer<swift::InProcess, TargetTypeContextDescriptor>
+swift::_swift_getTypeContextDescriptor(const Metadata *type) {
+    return type->getTypeContextDescriptor();
+}
+
+#endif // !SWIFT_OBJC_INTEROP