FIR: Support proper implicit return type computation for local classes

compiler/fir/analysis-tests/testData/resolve/localClasses/implicitInAnonymous.kt

@@ -0,0 +1,16 @@
+private val x = object {
+    fun foo(x: Int) = /* here we have not computed return type for "bar" */bar(x)
+    fun bar(y: Int) = this.hashCode() + y > 0
+
+    val w get() = z
+    val z get() = this.hashCode() == 0
+}
+
+fun useBoolean(b: Boolean) {}
+
+fun main() {
+    useBoolean(x.foo(1))
+    useBoolean(x.bar(2))
+    useBoolean(x.w)
+    useBoolean(x.z)
+}

compiler/fir/analysis-tests/testData/resolve/localClasses/implicitInAnonymous.txt

@@ -0,0 +1,35 @@
+FILE: implicitInAnonymous.kt
+    private final val x: R|anonymous| = object : R|kotlin/Any| {
+        private constructor(): R|anonymous| {
+            super<R|kotlin/Any|>()
+        }
+
+        public final fun foo(x: R|kotlin/Int|): R|kotlin/Boolean| {
+            ^foo this@R|/anonymous|.R|/anonymous.bar|(R|<local>/x|)
+        }
+
+        public final fun bar(y: R|kotlin/Int|): R|kotlin/Boolean| {
+            ^bar CMP(>, this@R|/anonymous|.R|kotlin/Any.hashCode|().R|kotlin/Int.plus|(R|<local>/y|).R|kotlin/Int.compareTo|(Int(0)))
+        }
+
+        public final val w: R|kotlin/Boolean|
+            public get(): R|kotlin/Boolean| {
+                ^ this@R|/anonymous|.R|/anonymous.z|
+            }
+
+        public final val z: R|kotlin/Boolean|
+            public get(): R|kotlin/Boolean| {
+                ^ ==(this@R|/anonymous|.R|kotlin/Any.hashCode|(), Int(0))
+            }
+
+    }
+
+        private get(): R|anonymous|
+    public final fun useBoolean(b: R|kotlin/Boolean|): R|kotlin/Unit| {
+    }
+    public final fun main(): R|kotlin/Unit| {
+        R|/useBoolean|(R|/x|.R|/anonymous.foo|(Int(1)))
+        R|/useBoolean|(R|/x|.R|/anonymous.bar|(Int(2)))
+        R|/useBoolean|(R|/x|.R|/anonymous.w|)
+        R|/useBoolean|(R|/x|.R|/anonymous.z|)
+    }

compiler/fir/analysis-tests/testData/resolve/localClasses/implicitInLocalClasses.kt

@@ -0,0 +1,37 @@
+fun useBoolean(b: Boolean) {}
+
+fun main() {
+    class A {
+        fun foo(x: Int) = bar(x)
+        fun bar(y: Int) = this.hashCode() + y > 0
+
+        val w get() = z
+        val z get() = this.hashCode() == 0
+    }
+
+    val a = A()
+
+    useBoolean(a.foo(1))
+    useBoolean(a.bar(1))
+    useBoolean(a.w)
+    useBoolean(a.z)
+
+    class B {
+        fun foo(x: Int) = inner.w
+        fun bar(y: Int) = this.hashCode() + y > 0
+
+        val inner = Inner()
+
+        inner class Inner {
+            val w get() = z
+            val z get() = bar(1)
+        }
+    }
+
+    val b = B()
+
+    useBoolean(b.foo(1))
+    useBoolean(b.bar(1))
+    useBoolean(b.inner.w)
+    useBoolean(b.inner.z)
+}

compiler/fir/analysis-tests/testData/resolve/localClasses/implicitInLocalClasses.txt

@@ -0,0 +1,75 @@
+FILE: implicitInLocalClasses.kt
+    public final fun useBoolean(b: R|kotlin/Boolean|): R|kotlin/Unit| {
+    }
+    public final fun main(): R|kotlin/Unit| {
+        local final class A : R|kotlin/Any| {
+            public constructor(): R|A| {
+                super<R|kotlin/Any|>()
+            }
+
+            public final fun foo(x: R|kotlin/Int|): R|kotlin/Boolean| {
+                ^foo this@R|/A|.R|/A.bar|(R|<local>/x|)
+            }
+
+            public final fun bar(y: R|kotlin/Int|): R|kotlin/Boolean| {
+                ^bar CMP(>, this@R|/A|.R|kotlin/Any.hashCode|().R|kotlin/Int.plus|(R|<local>/y|).R|kotlin/Int.compareTo|(Int(0)))
+            }
+
+            public final val w: R|kotlin/Boolean|
+                public get(): R|kotlin/Boolean| {
+                    ^ this@R|/A|.R|/A.z|
+                }
+
+            public final val z: R|kotlin/Boolean|
+                public get(): R|kotlin/Boolean| {
+                    ^ ==(this@R|/A|.R|kotlin/Any.hashCode|(), Int(0))
+                }
+
+        }
+
+        lval a: R|A| = R|/A.A|()
+        R|/useBoolean|(R|<local>/a|.R|/A.foo|(Int(1)))
+        R|/useBoolean|(R|<local>/a|.R|/A.bar|(Int(1)))
+        R|/useBoolean|(R|<local>/a|.R|/A.w|)
+        R|/useBoolean|(R|<local>/a|.R|/A.z|)
+        local final class B : R|kotlin/Any| {
+            public constructor(): R|B| {
+                super<R|kotlin/Any|>()
+            }
+
+            public final fun foo(x: R|kotlin/Int|): R|kotlin/Boolean| {
+                ^foo this@R|/B|.R|/B.inner|.R|/B.Inner.w|
+            }
+
+            public final fun bar(y: R|kotlin/Int|): R|kotlin/Boolean| {
+                ^bar CMP(>, this@R|/B|.R|kotlin/Any.hashCode|().R|kotlin/Int.plus|(R|<local>/y|).R|kotlin/Int.compareTo|(Int(0)))
+            }
+
+            public final val inner: R|B.Inner| = this@R|/B|.R|/B.Inner.Inner|()
+                public get(): R|B.Inner|
+
+            local final inner class Inner : R|kotlin/Any| {
+                public constructor(): R|B.Inner| {
+                    super<R|kotlin/Any|>()
+                }
+
+                public final val w: R|kotlin/Boolean|
+                    public get(): R|kotlin/Boolean| {
+                        ^ this@R|/B.Inner|.R|/B.Inner.z|
+                    }
+
+                public final val z: R|kotlin/Boolean|
+                    public get(): R|kotlin/Boolean| {
+                        ^ this@R|/B|.R|/B.bar|(Int(1))
+                    }
+
+            }
+
+        }
+
+        lval b: R|B| = R|/B.B|()
+        R|/useBoolean|(R|<local>/b|.R|/B.foo|(Int(1)))
+        R|/useBoolean|(R|<local>/b|.R|/B.bar|(Int(1)))
+        R|/useBoolean|(R|<local>/b|.R|/B.inner|.R|/B.Inner.w|)
+        R|/useBoolean|(R|<local>/b|.R|/B.inner|.R|/B.Inner.z|)
+    }