Add test case

Author: aschwaighofer

test/IRGen/async/async_context_projection_arm64e.swift

@@ -0,0 +1,25 @@
+// RUN: %target-swift-frontend -emit-irgen %s | %FileCheck %s
+
+// REQUIRES: CPU=arm64e
+
+public func callee() async -> Int {
+    return 5
+}
+
+public func caller() async {
+   let r = await callee()
+   print(r)
+}
+
+
+// CHECK: define swifttailcc void @"$s31async_context_projection_arm64e6calleryyYaF"(ptr swiftasync %0)
+// CHECK:  [[CURR_ASYNC_CTXT:%.*]] = alloca ptr
+// CHECK:  [[SUSPEND_RES:%.*]] = call { ptr, i64 } (i32, ptr, ptr, ...) @llvm.coro.suspend.async.sl_p0i64s(i32 0, ptr {{.*}}, ptr @__swift_async_resume_project_context, ptr @"$s31async_context_projection_arm64e6calleryyYaF{{.*}}", ptr @"$s31async_context_projection_arm64e6calleeSiyYaF", ptr {{.*}})
+// CHECK:  [[CALLEE_CTXT:%.*]] = extractvalue { ptr, i64 } [[SUSPEND_RES]], 0
+// CHECK:  [[CALLER_CTXT:%.*]] = load ptr, ptr [[CALLEE_CTXT]]
+// CHECK:  [[CALLER_CTXT_ADDR:%.*]] = ptrtoint ptr [[CALLEE_CTXT]] to i64
+// CHECK:  [[DIS:%.*]] = call i64 @llvm.ptrauth.blend(i64 [[CALLER_CTXT_ADDR]], i64 48546)
+// CHECK:  [[CALLER_CTXT_PTRAUTH:%.*]] = ptrtoint ptr [[CALLER_CTXT]] to i64
+// CHECK:  [[CALLER_CTXT_AUTH:%.*]] = call i64 @llvm.ptrauth.auth(i64 [[CALLER_CTXT_PTRAUTH]], i32 2, i64 [[DIS]])
+// CHECK:  [[CALLER_CTXT_PTR:%.*]] = inttoptr i64 [[CALLER_CTXT_AUTH]] to ptr
+// CHECK:  store ptr [[CALLER_CTXT_PTR]], ptr [[CURR_ASYNC_CTXT]]