[interop] test, add an Objective-C method invocation exception trapping test

Author: hyp

test/Interop/Cxx/exceptions/objc-trap-on-exception-irgen-itanium.swift

@@ -0,0 +1,47 @@
+// RUN: %empty-directory(%t)
+// RUN: split-file %s %t
+
+// RUN: %target-swift-emit-ir %t/test.swift -I %t/Inputs -enable-experimental-cxx-interop | %FileCheck %s
+
+// REQUIRES: objc_interop
+// UNSUPPORTED: OS=windows-msvc
+
+//--- Inputs/module.modulemap
+module ObjCXXModule {
+    header "objCXXHeader.h"
+}
+
+//--- Inputs/objCXXHeader.h
+
+@interface ObjCInterface
+
+- (void)method;
+
+@end
+
+ObjCInterface * _Nonnull retObjCInterface() noexcept;
+
+//--- test.swift
+
+import ObjCXXModule
+
+func testObjCMethodCall() {
+  let obj = retObjCInterface();
+  obj.method();
+}
+
+testObjCMethodCall()
+
+// CHECK: define {{.*}} @"$s4test0A14ObjCMethodCallyyF"() #[[#UWATTR:]] personality
+// CHECK: invoke void {{.*}} @objc_msgSend
+// CHECK-NEXT: to label %[[CONT1:.*]] unwind label %[[UNWIND1:.*]]
+// CHECK-EMPTY:
+// CHECK-NEXT: [[CONT1]]:
+// CHECK:  ret
+// CHECK-EMPTY:
+// CHECK-NEXT: [[UNWIND1]]:
+// CHECK-NEXT: landingpad { i8*, i32 }
+// CHECK-NEXT:    catch i8* null
+// CHECK-NEXT: call void @llvm.trap()
+// CHECK-NEXT: unreachable
+// CHECK-NEXT: }