JS: do not create variable for result, if inline call is only return subexpression

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

@@ -0,0 +1,30 @@
+package foo
+
+// CHECK_CONTAINS_NO_CALLS: test
+// CHECK_VARS_COUNT: function=test count=0
+
+inline fun sign(x: Int): Int {
+    if (x < 0) return -1
+
+    if (x == 0) return 0
+
+    return 1
+}
+
+fun test(x: Int, y: Int): Int {
+    if (x != 0) {
+        return sign(x)
+    }
+
+    return sign(y)
+}
+
+fun box(): String {
+    assertEquals(-1, test(-2, 2))
+    assertEquals(1, test(2, -2))
+    assertEquals(-1, test(0, -2))
+    assertEquals(1, test(0, 2))
+    assertEquals(0, test(0, 0))
+
+    return "OK"
+}