[FIR] Remove dependent data flow variables after receiver reassignment

2021-12-14 22:01:45 +03:00
parent 1f9ea50d1a
commit c5a03d0573
11 changed files with 184 additions and 25 deletions
@@ -0,0 +1,64 @@
+FILE: accessToMemberAfterReceiverReassignment.kt
+    public final class My : R|kotlin/Any| {
+        public constructor(x: R|My?|, z: R|My?| = Null(null)): R|My| {
+            super<R|kotlin/Any|>()
+        }
+
+        public final val x: R|My?| = R|<local>/x|
+            public get(): R|My?|
+
+        public final val z: R|My?| = R|<local>/z|
+            public get(): R|My?|
+
+    }
+    public final fun baseTest(): R|kotlin/Unit| {
+        lvar y: R|My?| = R|/My.My|(R|/My.My|(Null(null)))
+        when () {
+            !=(R|<local>/y|?.{ $subj$.R|/My.x| }, Null(null)) ->  {
+                R|<local>/y|.R|/My.x|.R|/My.x|
+                R|<local>/y| = R|/My.My|(Null(null))
+                R|<local>/y|.R|/My.x|.<Inapplicable(UNSAFE_CALL): /My.x>#
+            }
+        }
+
+    }
+    public final fun deepChainTest(): R|kotlin/Unit| {
+        lvar y: R|My?| = R|/My.My|(R|/My.My|(Null(null)))
+        when () {
+            !=(R|<local>/y|?.{ $subj$.R|/My.x| }?.{ $subj$.R|/My.x| }, Null(null)) ->  {
+                R|<local>/y|.R|/My.x|.R|/My.x|.R|/My.x|
+                R|<local>/y| = R|/My.My|(Null(null))
+                R|<local>/y|.R|/My.x|.<Inapplicable(UNSAFE_CALL): /My.x>#.<Inapplicable(UNSAFE_CALL): /My.x>#
+            }
+        }
+
+    }
+    public final fun backwardAliasTest(z: R|My|): R|kotlin/Unit| {
+        lvar y: R|My| = R|<local>/z|
+        when () {
+            !=(R|<local>/y|.R|/My.x|, Null(null)) ->  {
+                R|<local>/y|.R|/My.x|.R|/My.x|
+                R|<local>/y| = R|/My.My|(Null(null))
+                R|<local>/y|.R|/My.x|.<Inapplicable(UNSAFE_CALL): /My.x>#
+            }
+        }
+
+    }
+    public final fun severalMembersTest(): R|kotlin/Unit| {
+        lvar y: R|My| = R|/My.My|(R|/My.My|(Null(null)), R|/My.My|(Null(null)))
+        when () {
+            !=(R|<local>/y|.R|/My.x|, Null(null)) ->  {
+                when () {
+                    !=(R|<local>/y|.R|/My.z|, Null(null)) ->  {
+                        R|<local>/y|.R|/My.x|.R|/My.x|
+                        R|<local>/y|.R|/My.z|.R|/My.z|
+                        R|<local>/y| = R|/My.My|(Null(null))
+                        R|<local>/y|.R|/My.x|.<Inapplicable(UNSAFE_CALL): /My.x>#
+                        R|<local>/y|.R|/My.z|.<Inapplicable(UNSAFE_CALL): /My.z>#
+                    }
+                }
+
+            }
+        }
+
+    }
@@ -0,0 +1,41 @@
+class My(val x: My?, val z: My? = null)
+
+fun baseTest() {
+    var y: My? = My(My(null))
+    if (y?.x != null) {
+        y.x.x
+        y = My(null)
+        y.x<!UNSAFE_CALL!>.<!>x
+    }
+}
+
+fun deepChainTest() {
+    var y: My? = My(My(null))
+    if (y?.x?.x != null) {
+        y.x.x.x
+        y = My(null)
+        y.x<!UNSAFE_CALL!>.<!>x<!UNSAFE_CALL!>.<!>x
+    }
+}
+
+fun backwardAliasTest(z: My) {
+    var y = z
+    if (y.x != null) {
+        y.x.x
+        y = My(null)
+        y.x<!UNSAFE_CALL!>.<!>x
+    }
+}
+
+fun severalMembersTest() {
+    var y = My(My(null), My(null))
+    if (y.x != null) {
+        if (y.z != null) {
+            y.x.x
+            y.z.z
+            y = My(null)
+            y.x<!UNSAFE_CALL!>.<!>x
+            y.z<!UNSAFE_CALL!>.<!>z
+        }
+    }
+}