AbstractClosureAnnotator for IR.

compiler/testData/ir/closureAnnotator/localFunctions.closure

@@ -0,0 +1,7 @@
+Closure for function test2:
+  receiver for outer
+  variable y
+
+Closure for function test1:
+  receiver for outer
+

compiler/testData/ir/closureAnnotator/localFunctions.kt

@@ -0,0 +1,7 @@
+fun String.outer(x: Int) {
+    fun test1(x: Int, y: Int) {
+        fun test2(x: Int) = this + x + y
+        test2(y).length + x + y
+    }
+    test1(x, x * x)
+}

compiler/testData/ir/closureAnnotator/multipleThisReferences.closure

@@ -0,0 +1,15 @@
+Closure for constructor <no name provided>:
+
+Closure for function test1:
+  'this' for C
+
+Closure for function <anonymous>:
+  'this' for C
+  'this' for <no name provided>
+
+Closure for function test2:
+  'this' for C
+
+Closure for class <no name provided>:
+  'this' for C
+

compiler/testData/ir/closureAnnotator/multipleThisReferences.kt

@@ -0,0 +1,6 @@
+class C {
+    fun foo() = object {
+        fun test1() = this@C.toString() + this.toString()
+        fun test2() = { this@C.toString() + this.toString() }
+    }
+}

compiler/testData/ir/closureAnnotator/topLevelDeclarations.closure

@@ -0,0 +1,6 @@
+Closure for constructor <no name provided>:
+
+Closure for function test6:
+
+Closure for class <no name provided>:
+

compiler/testData/ir/closureAnnotator/topLevelDeclarations.kt

@@ -0,0 +1,10 @@
+fun Int.test1(x: Int) = this + x
+
+class Test2(val x: Int) {
+    fun test3() = x
+    fun Int.test4() = this + x
+}
+
+val test5 = object {
+    fun Int.test6(x: Int) = this + x
+}