JS/Inlining: minor improvements and clarifications after code review. Test whether expression without side effect does not prevent to relocate another expressions

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

@@ -0,0 +1,29 @@
+// CHECK_VARS_COUNT: function=box count=1
+
+package foo
+
+var log = ""
+
+class A() {
+    var x = 23
+}
+
+fun sideEffect(): Int {
+    log += "sideEffect();"
+    return 42
+}
+
+fun bar(a: Int, b: Int) {
+    log += "bar($a, $b);"
+}
+
+inline fun test(a: Int, b: Int) {
+    bar(b, a)
+}
+
+fun box(): String {
+    val a = A()
+    test(sideEffect(), a.x)
+    assertEquals("sideEffect();bar(23, 42);", log)
+    return "OK"
+}

js/js.translator/testData/js-optimizer/temporary-assignment/ifWithoutElse.original.js

@@ -4,18 +4,18 @@ function f(x) {
 
 function box() {
     var result1, result2, $a, $b;
-    
+
     if (f(true)) {
         $a = "1";
     }
     result1 = $a;
     if (result1 !== "1") return "fail1: " + result1;
-    
+
     if (f(false)) {
         $b = "1";
     }
     result2 = $b;
     if (result2 !== void 0) return "fail2: " + result2;
-    
+
     return "OK";
 }