Support unboxing of inline classes after assertion operator

compiler/testData/codegen/box/inlineClasses/checkBoxingAfterAssertionOperator.kt

@@ -0,0 +1,47 @@
+// !LANGUAGE: +InlineClasses
+
+inline class WithPrimitive(val a: Int)
+fun takeWithPrimitive(a: WithPrimitive) {}
+
+inline class WithReference(val a: Any)
+fun takeWithReference(a: WithReference) {}
+
+inline class WithNullableReference(val a: Any?)
+fun takeWithNullableReference(a: WithNullableReference) {}
+
+fun foo(a: WithPrimitive?, b: WithPrimitive) {
+    takeWithPrimitive(a!!) // unbox
+    takeWithPrimitive(a) // unbox
+    takeWithPrimitive(b!!)
+}
+
+fun bar(a: WithReference?, b: WithReference) {
+    takeWithReference(a!!)
+    takeWithReference(a)
+    takeWithReference(b!!)
+}
+
+fun baz(a: WithNullableReference?, b: WithNullableReference) {
+    takeWithNullableReference(a!!) // unbox
+    takeWithNullableReference(a) // unbox
+    takeWithNullableReference(a!!) // unbox
+    takeWithNullableReference(b!!)
+}
+
+fun box(): String {
+    val a1 = WithPrimitive(1)
+    val b1 = WithPrimitive(2)
+
+    foo(a1, b1)
+
+    val a2 = WithReference("")
+
+    bar(a2, a2)
+
+    val a3 = WithNullableReference("test")
+    val a4 = WithNullableReference(123)
+
+    baz(a3, a4)
+
+    return "OK"
+}

compiler/testData/codegen/bytecodeText/inlineClasses/inlineClassesUnboxingAfterAssertionOperator.kt

@@ -0,0 +1,36 @@
+// !LANGUAGE: +InlineClasses
+
+inline class WithPrimitive(val a: Int)
+fun takeWithPrimitive(a: WithPrimitive) {}
+
+inline class WithReference(val a: Any)
+fun takeWithReference(a: WithReference) {}
+
+inline class WithNullableReference(val a: Any?)
+fun takeWithNullableReference(a: WithNullableReference) {}
+
+fun foo(a: WithPrimitive?, b: WithPrimitive) {
+    takeWithPrimitive(a!!) // unbox
+    takeWithPrimitive(a) // unbox
+    takeWithPrimitive(b!!)
+}
+
+fun bar(a: WithReference?, b: WithReference) {
+    takeWithReference(a!!)
+    takeWithReference(a)
+    takeWithReference(b!!)
+}
+
+fun baz(a: WithNullableReference?, b: WithNullableReference) {
+    takeWithNullableReference(a!!) // unbox
+    takeWithNullableReference(a) // unbox
+    takeWithNullableReference(a!!) // unbox
+    takeWithNullableReference(b!!)
+}
+
+// 2 INVOKEVIRTUAL WithPrimitive\.unbox
+// 0 INVOKEVIRTUAL WithReference\.unbox
+// 3 INVOKEVIRTUAL WithNullableReference\.unbox
+
+// 0 intValue
+// 0 valueOf