[Stats] Add a test for -profile-stats-{events,entities}

Author: graydon

test/Misc/stats_dir_profiler.swift

@@ -0,0 +1,30 @@
+// RUN: %empty-directory(%t)
+// RUN: %empty-directory(%t/stats-events)
+// RUN: %empty-directory(%t/stats-entities)
+// RUN: %target-swiftc_driver -o %t/main -module-name main -stats-output-dir %t/stats-events %s -profile-stats-events
+// RUN: %target-swiftc_driver -o %t/main -module-name main -stats-output-dir %t/stats-entities %s -profile-stats-entities
+// RUN: %FileCheck -check-prefix=EVENTS -input-file %t/stats-events/*.dir/Time.User.events %s
+// RUN: %FileCheck -check-prefix=ENTITIES -input-file %t/stats-entities/*.dir/Time.User.entities %s
+
+// EVENTS: {{perform-sema;.*;typecheck-decl [0-9]+}}
+// ENTITIES: {{perform-sema;.*;typecheck-fn bar\(\);typecheck-decl <pattern binding> [0-9]+}}
+
+public func foo() {
+    print("hello")
+}
+
+protocol Proto {
+  func bar() -> Int;
+}
+
+class Bar {
+  typealias T = Int
+}
+
+extension Bar : Proto {
+  func bar() -> T {
+    let x = 1
+    let y = Int(1.0)
+    return x + y
+  }
+}