Remove optimizations performed during JS inlining. Implement several optimizations as a separate pass

js/js.translator/testData/inlineSizeReduction/cases/inlineOrder.kt

@@ -0,0 +1,73 @@
+package foo
+
+// CHECK_VARS_COUNT: function=test1 count=0
+// CHECK_VARS_COUNT: function=test2 count=0
+// CHECK_VARS_COUNT: function=test3 count=0
+// CHECK_VARS_COUNT: function=test4 count=0
+// CHECK_VARS_COUNT: function=test5 count=0
+
+var global = ""
+var globalNum = 1
+var returnValue = 0
+
+fun pure(n: Int) = n
+
+fun x(n: Int) = globalNum++ * n
+
+inline fun a(n: Int) = x(n)
+
+fun b(n: Int) {
+    returnValue = n
+}
+
+fun c(first: Int, second: Int, third: Int) = first + second + third
+
+inline fun d(first: Int, second: Int, third: Int) {
+    returnValue = first + second + third
+}
+
+fun test1(): Int {
+    globalNum = 1
+    return x(a(1) + a(10) + a(100))
+}
+
+fun test2() {
+    globalNum = 1
+    b(a(1) + a(10) + a(100))
+}
+
+fun test3(): Int {
+    globalNum = 1
+    return c(a(1), a(10), a(100))
+}
+
+fun test4() {
+    globalNum = 1
+    d(a(1), a(10), a(100))
+}
+
+fun test5(): Int {
+    globalNum = 1
+    return globalNum++ + a(10) + (globalNum++ * 100)
+}
+
+fun box(): String {
+    var result = test1()
+    if (result != 1284) return "fail1: $result"
+
+    test2()
+    result = returnValue
+    if (result != 321) return "fail2: $result"
+
+    result = test3()
+    if (result != 321) return "fail3: $result"
+
+    test4()
+    result = returnValue
+    if (result != 321) return "fail4: $result"
+
+    result = test5()
+    if (result != 321) return "fail5: $result"
+
+    return "OK"
+}

js/js.translator/testData/inlineSizeReduction/cases/propertyAssignment.kt

@@ -0,0 +1,25 @@
+package foo
+
+// CHECK_CONTAINS_NO_CALLS: test
+// CHECK_VARS_COUNT: function=test count=0
+
+object SumHolder {
+    var sum = 0
+}
+
+internal inline fun sum(x: Int, y: Int): Int {
+    if (x == 0 || y == 0) return 0
+
+    return x + y
+}
+
+internal fun test(x: Int, y: Int) {
+    SumHolder.sum = sum(x, y)
+}
+
+fun box(): String {
+    test(1, 2)
+    assertEquals(3, SumHolder.sum)
+
+    return "OK"
+}