[JS IR BE] Refactor equals and compareTo lowering

js/js.translator/testData/box/expression/compareTo/booleanCompareTo.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND: JS_IR
 // EXPECTED_REACHABLE_NODES: 1282
 fun box(): String {
     val r1 = trueFun() > falseFun()
@@ -24,4 +23,4 @@ fun box(): String {
 
 fun trueFun() = true
 
-fun falseFun() = false
+fun falseFun() = false

js/js.translator/testData/box/number/numberEquals.kt

@@ -0,0 +1,57 @@
+// !LANGUAGE: +ProperIeee754Comparisons
+// IGNORE_BACKEND: JS
+// EXPECTED_REACHABLE_NODES: 1112
+package foo
+
+
+fun testNullable(): String {
+    val undefined: Double? = js("undefined")
+    val doubleNull: Double? = null
+
+    val plusZero: Double? = +0.0
+    val minusZero: Double? = -0.0
+
+    if ((+0.0).equals(minusZero)) return "Total order fail"
+    if (plusZero != minusZero) return "IEEE 754 equals fail"
+
+    if (plusZero == doubleNull) return "+0.0 != null fail"
+    if (plusZero == undefined) return "+0.0 != undefined fail"
+
+    if (undefined != doubleNull) return "undefined == null fail"
+    if (undefined != undefined) return "undefined = undefined fail"
+    if (doubleNull != doubleNull) return "doubleNull = doubleNull fail"
+
+    // Double == Float
+    val plusZeroAny: Any? = +0.0
+    val minusZeroAny: Any? = -0.0f
+
+    if (plusZeroAny is Double && minusZeroAny is Float) {
+        if  (plusZeroAny != minusZeroAny) return "IEEE 754 quals fail 2"
+    }
+
+    return "OK"
+}
+
+fun box(): String {
+    val plusZero: Double = +0.0
+    val minusZero: Double = -0.0
+
+    if (plusZero.equals(minusZero)) return "Total order fail"
+    if (plusZero != minusZero) return "IEEE 754 equals fail"
+
+    val plusZeroFloat: Float = +0.0f
+    val minusZeroFloat: Float = -0.0f
+
+    if (plusZeroFloat.equals(minusZeroFloat)) return "Total order fail 2"
+    if (plusZeroFloat != minusZeroFloat) return "IEEE 754 equals fail 2"
+
+    if ((plusZero as Any) == (minusZero as Any)) return "Total order fail 4"
+    if ((plusZeroFloat as Any) == (minusZeroFloat as Any)) return "Total order fail 5"
+    if (plusZero == (minusZero as Any)) return "Total order fail 6"
+
+    val nullableRes = testNullable()
+    if (nullableRes != "OK")
+        return "Nullable" + nullableRes
+
+    return "OK"
+}