Perform bytecode optimisations for inline classes

#KT-23742 Fixed

compiler/testData/codegen/bytecodeText/boxingOptimization/boxingAndEquals.kt

@@ -1,3 +1,5 @@
+// !LANGUAGE: +InlineClasses
+
 // https://youtrack.jetbrains.com/issue/KT-15871
 
 // FILE: Test.kt
@@ -10,8 +12,20 @@ fun getAndCheckInt(a: Int, b: Int) =
 // 0 Value
 // 0 areEqual
 
+// FILE: TestInlined.kt
+
+fun getAndCheckInlinedInt(a: InlinedInt, b: InlinedInt) =
+        getAndCheck({ a }, { b })
+
+// @TestInlinedKt.class:
+// 0 valueOf
+// 0 Value
+// 0 areEqual
+// 0 INVOKESTATIC InlinedInt\$Erased.box
+// 0 INVOKEVIRTUAL InlinedInt.unbox
+
 // FILE: Inline.kt
 inline fun <T> getAndCheck(getFirst: () -> T, getSecond: () -> T) =
         getFirst() == getSecond()
 
-
+inline class InlinedInt(val x: Int)

compiler/testData/codegen/bytecodeText/boxingOptimization/checkcastAndInstanceOf.kt

@@ -1,3 +1,6 @@
+// !LANGUAGE: +InlineClasses
+
+// FILE: Test.kt
 
 inline fun <R, T> foo(x : R, y : R, block : (R) -> T) : T {
     val a = x is Number
@@ -17,7 +20,26 @@ fun bar() {
     foo(1, 2) { x -> x is Int }
 }
 
+// @TestKt.class:
 // 0 valueOf
 // 0 Value\s\(\)
 // 2 INSTANCEOF
 // 1 CHECKCAST
+
+// FILE: Inline.kt
+
+inline class InlinedInt(val x: Int)
+
+// FILE: TestInlined.kt
+
+fun baz() {
+    foo(InlinedInt(1), InlinedInt(2)) { x -> x is InlinedInt }
+}
+
+// @TestInlinedKt.class:
+// 0 valueOf
+// 0 Value\s\(\)
+// 0 INSTANCEOF
+// 0 CHECKCAST
+// 0 INVOKESTATIC InlinedInt\$Erased.box
+// 0 INVOKEVIRTUAL InlinedInt.unbox

compiler/testData/codegen/bytecodeText/boxingOptimization/inlineClassesAndInlinedLambda.kt

@@ -0,0 +1,36 @@
+// !LANGUAGE: +InlineClasses
+
+
+// FILE: dependency.kt
+
+inline class InlinedInt(val internal: Int)
+inline class InlinedString(val internal: String)
+
+inline fun <T> foo(callback: () -> T): T {
+    return callback()
+}
+
+inline fun bar(callback: () -> InlinedInt): InlinedInt {
+    return callback()
+}
+
+inline fun baz(callback: () -> InlinedString): InlinedString {
+    return callback()
+}
+
+// FILE: test.kt
+
+fun test(i: InlinedInt, s: InlinedString) {
+    foo { i }
+    bar { i }
+
+    foo { s }
+    baz { s }
+}
+
+// @TestKt.class:
+// 0 valueOf
+// 0 INVOKESTATIC InlinedInt\$Erased.box
+// 0 INVOKEVIRTUAL InlinedInt.unbox
+// 0 INVOKESTATIC InlinedString\$Erased.box
+// 0 INVOKEVIRTUAL InlinedString.unbox