[Stats] Expand -trace-stats-events test to cover recent work.

Author: graydon

test/Misc/stats_dir_tracer.swift

@@ -2,8 +2,26 @@
 // RUN: %target-swiftc_driver -o %t/main -module-name main -stats-output-dir %t %s -trace-stats-events
 // RUN: %FileCheck -input-file %t/*.csv %s
 
-// CHECK: {{"Sema.NumTypesDeserialized"}}
+// CHECK: {{[0-9]+,[0-9]+,"exit","check-conformance","Sema.NominalTypeLookupDirectCount",[0-9]+,[0-9]+,"<conformance Bar : Proto>","\[.*stats_dir_tracer.swift:21:1 - line:27:1\]"}}
+// CHECK: {{[0-9]+,[0-9]+,"exit","typecheck-fn","Sema.NumTypesDeserialized",[0-9]+,[0-9]+,"foo\(\)","\[.*stats_dir_tracer.swift:9:8 - line:11:1\]"}}
+// CHECK: {{[0-9]+,[0-9]+,"exit","typecheck-decl","Sema.NumConstraintScopes",[0-9]+,[0-9]+,"<pattern binding>","\[.*stats_dir_tracer.swift:23:5 - line:23:13\]"}}
 
 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
+  }
+}