test: add basic sema test

Author: nkcsgexi

test/Sema/spi-available-local.swift

@@ -0,0 +1,13 @@
+// RUN: %empty-directory(%t)
+// RUN: not %target-swift-frontend -target %target-cpu-apple-macosx11.9 -parse-as-library %s -typecheck -library-level=api >& %t/macos.txt
+// RUN: %FileCheck %s < %t/macos.txt
+
+// RUN: %target-swift-frontend -target arm64-apple-ios13.0  -parse-as-library %s -typecheck -library-level=api
+
+@_spi_available(macOS 10.10, *)
+@available(iOS 8.0, *)
+public class SPIClass {}
+
+public func foo(_ c: SPIClass) {}
+
+// CHECK: cannot use class 'SPIClass' here; it is SPI

test/Sema/spi-available-swift-module.swift

@@ -0,0 +1,26 @@
+// RUN: %empty-directory(%t)
+// RUN: %empty-directory(%t/macos)
+// RUN: %empty-directory(%t/ios)
+
+// RUN: %target-swift-frontend -target %target-cpu-apple-macosx11.9 -parse-as-library %s -emit-module -library-level=api -emit-module-path %t/macos/Foo.swiftmodule -module-name Foo -DFoo
+// RUN: %target-swift-frontend -target arm64-apple-ios13.0 -parse-as-library %s -emit-module -library-level=api -emit-module-path %t/ios/Foo.swiftmodule -module-name Foo -DFoo
+
+// RUN: not %target-swift-frontend -target %target-cpu-apple-macosx11.9 -parse-as-library %s -typecheck -library-level=api -I %t/macos >& %t/macos.txt
+// RUN: %FileCheck %s < %t/macos.txt
+
+// RUN: %target-swift-frontend -target arm64-apple-ios13.0 -parse-as-library %s -typecheck -library-level=api -I %t/ios
+
+#if Foo
+
+@_spi_available(macOS 10.10, *)
+@available(iOS 8.0, *)
+public class SPIClass {}
+
+#else
+
+import Foo
+public func foo(_ c: SPIClass) {}
+
+#endif
+
+// CHECK: cannot use class 'SPIClass' here; it is an SPI imported from 'Foo'