Add SILGen test for usage of dynamic accessors in and out of interfaces

Author: Harlan Haskins

test/SILGen/dynamic_accessors.swift

@@ -0,0 +1,43 @@
+// RUN: %empty-directory(%t)
+// RUN: %target-swift-frontend -emit-module -o /dev/null -disable-objc-attr-requires-foundation-module -emit-interface-path %t/dynamic_accessors.swiftinterface %s
+// RUN: %target-swift-emit-silgen -disable-objc-attr-requires-foundation-module %s | %FileCheck %s
+// RUN: %target-swift-frontend -emit-silgen -disable-objc-attr-requires-foundation-module %t/dynamic_accessors.swiftinterface | %FileCheck %s
+
+public class MyObjCClass {
+  @objc public dynamic var a: Int {
+    // CHECK-LABEL: sil [thunk] @$s17dynamic_accessors11MyObjCClassC1aSivgTo : $@convention(objc_method) (MyObjCClass) -> Int {
+    // CHECK:  function_ref @$s17dynamic_accessors11MyObjCClassC1aSivg
+    // CHECK: }
+    get { return 4 }
+
+    // CHECK-LABEL sil [thunk] @$s17dynamic_accessors11MyObjCClassC1aSivsTo : $@convention(objc_method) (Int, MyObjCClass) -> () {
+    // CHECK: function_ref @$s17dynamic_accessors11MyObjCClassC1aSivs
+    // CHECK: }
+    set {}
+  }
+
+  @objc public dynamic subscript(x: Int) -> Int {
+    // CHECK-LABEL: sil [thunk] @$s17dynamic_accessors11MyObjCClassCyS2icigTo : $@convention(objc_method) (Int, MyObjCClass) -> Int {
+    // CHECK: function_ref @$s17dynamic_accessors11MyObjCClassCyS2icig
+    // CHECK: }
+    get { return x }
+
+    // CHECK-LABEL: sil [thunk] @$s17dynamic_accessors11MyObjCClassCyS2icisTo : $@convention(objc_method) (Int, Int, MyObjCClass) -> () {
+    // CHECK: function_ref @$s17dynamic_accessors11MyObjCClassCyS2icis
+    // CHECK: }
+    set {}
+  }
+
+  public init() {}
+}
+
+@inlinable public func foo() {
+  let x = MyObjCClass()
+  // CHECK: objc_method %{{[0-9]+}} : $MyObjCClass, #MyObjCClass.a!getter.1.foreign
+  // CHECK: objc_method %{{[0-9]+}} : $MyObjCClass, #MyObjCClass.a!setter.1.foreign
+  x.a = x.a + 1
+
+  // CHECK: objc_method %{{[0-9]+}} : $MyObjCClass, #MyObjCClass.subscript!getter.1.foreign
+  // CHECK: objc_method %{{[0-9]+}} : $MyObjCClass, #MyObjCClass.subscript!setter.1.foreign
+  x[4] = x[5]
+}