FIR: Change semantics for combination of safe calls and operators

^KT-41034 Fixed

compiler/testData/codegen/box/safeCall/augmentedAssigmentPlus.kt

@@ -0,0 +1,56 @@
+// TARGET_BACKEND: JVM_IR
+// IGNORE_BACKEND: JVM_IR
+
+var cnt = 0
+
+class A
+
+var A?.b: A?
+    get() {
+        return this
+    }
+    set(v) {
+        cnt++
+    }
+
+var A?.c: A?
+    get() {
+        return this
+    }
+    set(v) {
+        cnt++
+    }
+
+operator fun A?.get(i: Int): A? = this
+operator fun A?.set(i: Int, v: A?): A? {
+    cnt++
+
+    return this
+}
+
+operator fun A?.plus(a: A?) = this
+
+fun test(a: A?) {
+    a?.b += null
+    a?.b?.c += null
+    a?.b.c += null // ".c" will be called anyway
+
+    a?.b[0] += null
+    a?.b?.c[0] += null
+    a?.b.c[0] += null // ".c" will be called anyway
+
+    a?.b[0][0] += null
+    a?.b?.c[0][0] += null
+    a?.b.c[0][0] += null // ".c" will be called anyway
+}
+
+fun box(): String {
+    test(null)
+    if (cnt != 3) return "fail 1: $cnt"
+
+    cnt = 0
+    test(A())
+    if (cnt != 9) return "fail 2: $cnt"
+
+    return "OK"
+}

compiler/testData/codegen/box/safeCall/augmentedAssigmentPlusAssign.kt

@@ -0,0 +1,53 @@
+// TARGET_BACKEND: JVM_IR
+// IGNORE_BACKEND: JVM_IR
+
+var cnt = 0
+
+class A
+
+var A?.b: A?
+    get() {
+        return this
+    }
+    set(v) {
+        cnt++
+    }
+
+var A?.c: A?
+    get() {
+        return this
+    }
+    set(v) {
+        cnt++
+    }
+
+operator fun A?.get(i: Int): A? = this
+
+operator fun A?.plusAssign(a: A?) {
+    cnt++
+}
+
+fun test(a: A?) {
+    a?.b += null
+    a?.b?.c += null
+    a?.b.c += null // ".c" will be called anyway
+
+    a?.b[0] += null
+    a?.b?.c[0] += null
+    a?.b.c[0] += null // ".c" will be called anyway
+
+    a?.b[0][0] += null
+    a?.b?.c[0][0] += null
+    a?.b.c[0][0] += null // ".c" will be called anyway
+}
+
+fun box(): String {
+    test(null)
+    if (cnt != 3) return "fail 1: $cnt"
+
+    cnt = 0
+    test(A())
+    if (cnt != 9) return "fail 2: $cnt"
+
+    return "OK"
+}

compiler/testData/codegen/box/safeCall/incrementPostfix.kt

@@ -0,0 +1,58 @@
+// TARGET_BACKEND: JVM_IR
+// IGNORE_BACKEND: JVM_IR
+
+var cnt = 0
+
+class A
+
+var A?.b: A?
+    get() {
+        return this
+    }
+    set(v) {
+        cnt++
+    }
+
+var A?.c: A?
+    get() {
+        return this
+    }
+    set(v) {
+        cnt++
+    }
+
+operator fun A?.get(i: Int): A? = this
+operator fun A?.set(i: Int, v: A?): A? {
+    cnt++
+
+    return this
+}
+
+operator fun A?.inc(): A? {
+    return this
+}
+
+fun test(a: A?) {
+    a?.b++
+    a?.b?.c++
+    a?.b.c++ // ".c" will be called anyway
+
+    a?.b[0]++
+    a?.b?.c[0]++
+    a?.b.c[0]++ // ".c" will be called anyway
+
+    a?.b[0][0]++
+    a?.b?.c[0][0]++
+    a?.b.c[0][0]++ // ".c" will be called anyway
+}
+
+fun box(): String {
+    test(null)
+    if (cnt != 3) return "fail 1: $cnt"
+
+    cnt = 0
+    test(A())
+    if (cnt != 9) return "fail 2: $cnt"
+
+    return "OK"
+}

compiler/testData/codegen/box/safeCall/incrementPrefix.kt

@@ -0,0 +1,57 @@
+// TARGET_BACKEND: JVM_IR
+// IGNORE_BACKEND: JVM_IR
+
+var cnt = 0
+
+class A
+
+var A?.b: A?
+    get() {
+        return this
+    }
+    set(v) {
+        cnt++
+    }
+
+var A?.c: A?
+    get() {
+        return this
+    }
+    set(v) {
+        cnt++
+    }
+
+operator fun A?.get(i: Int): A? = this
+operator fun A?.set(i: Int, v: A?): A? {
+    cnt++
+    return this
+}
+
+operator fun A?.inc(): A? {
+    return this
+}
+
+fun test(a: A?) {
+    ++a?.b
+    ++a?.b?.c
+    ++a?.b.c // ".c" will be called anyway
+
+    ++a?.b[0]
+    ++a?.b?.c[0]
+    ++a?.b.c[0] // ".c" will be called anyway
+
+    ++a?.b[0][0]
+    ++a?.b?.c[0][0]
+    ++a?.b.c[0][0] // ".c" will be called anyway
+}
+
+fun box(): String {
+    test(null)
+    if (cnt != 3) return "fail 1: $cnt"
+
+    cnt = 0
+    test(A())
+    if (cnt != 9) return "fail 2: $cnt"
+
+    return "OK"
+}

compiler/testData/codegen/box/safeCall/withAssignment.kt

@@ -0,0 +1,54 @@
+// TARGET_BACKEND: JVM_IR
+// IGNORE_BACKEND: JVM_IR
+
+var cnt = 0
+
+class A
+
+var A?.b: A?
+    get() {
+        return this
+    }
+    set(v) {
+        cnt++
+    }
+
+var A?.c: A?
+    get() {
+        return this
+    }
+    set(v) {
+        cnt++
+    }
+
+operator fun A?.get(i: Int): A? = this
+operator fun A?.set(i: Int, v: A?): A? {
+    cnt++
+
+    return this
+}
+
+fun test(a: A?) {
+    a?.b = null
+    a?.b?.c = null
+    a?.b.c = null // ".c" will be called anyway
+
+    a?.b[0] = null
+    a?.b?.c[0] = null
+    a?.b.c[0] = null // ".c" will be called anyway
+
+    a?.b[0][0] = null
+    a?.b?.c[0][0] = null
+    a?.b.c[0][0] = null // ".c" will be called anyway
+}
+
+fun box(): String {
+    test(null)
+    if (cnt != 3) return "fail 1: $cnt"
+
+    cnt = 0
+    test(A())
+    if (cnt != 9) return "fail 2: $cnt"
+
+    return "OK"
+}