Box values of inline class types when passing to function as varargs

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

@@ -0,0 +1,17 @@
+// !LANGUAGE: +InlineClasses
+
+inline class UInt(val u: Int)
+
+fun <T> takeVarargs(vararg e: T) {}
+
+fun test(u1: UInt, u2: UInt, u3: UInt?) {
+    takeVarargs(u1, u2) // 2 box
+    takeVarargs(u3)
+    takeVarargs(u1, u3) // box
+}
+
+// 3 INVOKESTATIC UInt\$Erased.box
+// 0 INVOKEVIRTUAL UInt.unbox
+
+// 0 valueOf
+// 0 intValue