[test] Introduced a test of the PC macro and nested functions.

Author: cwakamo

test/PCMacro/nested_function.swift

@@ -0,0 +1,49 @@
+// RUN: rm -rf %t
+// RUN: mkdir -p %t
+// RUN: cp %s %t/main.swift
+// RUN: %target-build-swift -Xfrontend -pc-macro -o %t/main %S/Inputs/PCMacroRuntime.swift %t/main.swift
+// RUN: %target-run %t/main | %FileCheck %s
+// RUN: %target-build-swift -Xfrontend -pc-macro -Xfrontend -playground -Xfrontend -debugger-support -o %t/main %S/Inputs/PCMacroRuntime.swift %t/main.swift %S/Inputs/SilentPlaygroundsRuntime.swift
+// RUN: %target-run %t/main | %FileCheck %s
+// REQUIRES: executable_test
+
+// FIXME: rdar://problem/30234450 PCMacro tests fail on linux in optimized mode
+// UNSUPPORTED: OS=linux-gnu
+
+#sourceLocation(file: "main.swift", line: 8)
+func foo() {
+  func bar() {
+    2
+  }
+  
+  let baz: () -> Void = {
+    3
+  }
+  
+  1
+  bar()
+  baz()
+}
+
+foo()
+
+// CHECK: [22:1-22:6] pc before
+// CHECK-NEXT: [8:1-8:11] pc before
+// CHECK-NEXT: [8:1-8:11] pc after
+// CHECK-NEXT: [13:3-15:4] pc before
+// CHECK-NEXT: [13:3-15:4] pc after
+// CHECK-NEXT: [17:3-17:4] pc before
+// CHECK-NEXT: [17:3-17:4] pc after
+// CHECK-NEXT: [18:3-18:8] pc before
+// CHECK-NEXT: [9:3-9:13] pc before
+// CHECK-NEXT: [9:3-9:13] pc after
+// CHECK-NEXT: [10:5-10:6] pc before
+// CHECK-NEXT: [10:5-10:6] pc after
+// CHECK-NEXT: [18:3-18:8] pc after
+// CHECK-NEXT: [19:3-19:8] pc before
+// CHECK-NEXT: [14:5-14:6] pc before
+// CHECK-NEXT: [14:5-14:6] pc after
+// CHECK-NEXT: [14:5-14:6] pc before
+// CHECK-NEXT: [14:5-14:6] pc after
+// CHECK-NEXT: [19:3-19:8] pc after
+// CHECK-NEXT: [22:1-22:6] pc after