1 files changed, 95 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/cacheir/tobool.js b/js/src/jit-test/tests/cacheir/tobool.js
new file mode 100644
index 0000000000..8487703e1f
--- /dev/null
+++ b/js/src/jit-test/tests/cacheir/tobool.js
@@ -0,0 +1,95 @@
+var success         = 0;
+var expected_bool   = 0;
+var expected_int    = 0;
+var expected_double = 0;
+var expected_string = 0;
+var expected_object = 0;
+var expected_symbol = 0;
+
+function test_type_stable_ic() {
+    // Initialize as falsy where possible.
+    var a = undefined; // No Change, never succeeds
+    var b = null;      // No Change, never succeeds
+    var c = false;     // Alternate between true and false.
+    var d = 0;         // Int32 cache checker, change int values
+    var e = "";        // String cache checker, change string values
+    var f = Symbol();  // No change, always succeed, no cache.
+    var g = {};        // Change objects, always succeed.
+    var h = -0;        // Double cache checker, change double values.
+
+    for (var i =0; i < 30; i++) {
+        // Switch between values to ensure the caches fire.
+        switch (i % 3) {
+            case 0:
+                d = 0;
+                e = "hi"; expected_string++;
+                c = true; expected_bool++;
+                h = 0;
+                break;
+            case 1:
+                d = 1; expected_int++;
+                e = "";
+                c = false;
+                h = NaN;
+                break;
+            case 2:
+                d = 2; expected_int++;
+                h = 1.234; expected_double++;
+                g = {};
+                break;
+        }
+
+        if (a) { success++; }
+        if (b) { success++; }
+        if (c) { success++; }
+        if (d) { success++; }
+        if (e) { success++; }
+        if (f) { success++; } expected_symbol++; // Symbol succeed
+        if (g) { success++; } expected_object++; // Object success
+        if (h) { success++; }
+    }
+}
+
+test_type_stable_ic();
+
+assertEq(success, expected_bool + expected_double + expected_int + expected_object + expected_string + expected_symbol);
+
+
+// Test cache failures.
+function helper(fun, arg, n)
+{
+    var r = 0;
+    for (var i = 0; i < n; i++) {
+        r = fun(arg);
+    }
+    return r ? 1 : 0;
+}
+
+function test_transition(fun, load, test, before, after) {
+    var a = helper(fun, load, 30);
+    var x = helper(fun, test, 5)
+    assertEq(a, before);
+    assertEq(x, after)
+}
+
+var fun1 = (x) => { if (x) return true; else return false; };
+var fun2 = (x) => { if (x) return true; else return false; };
+var fun3 = (x) => { if (x) return true; else return false; };
+var fun4 = (x) => { if (x) return true; else return false; };
+var fun5 = (x) => { if (x) return true; else return false; };
+var fun6 = (x) => { if (x) return true; else return false; };
+var fun7 = (x) => { if (x) return true; else return false; };
+var fun8 = (x) => { if (x) return true; else return false; };
+
+// NaN -> Int32
+test_transition(fun1, NaN, 1, 0, 1);
+test_transition(fun2, 1, NaN, 1, 0);
+// NaN -> Object / Object -> NaN
+test_transition(fun3, NaN, {}, 0, 1);
+test_transition(fun4, {}, NaN, 1, 0);
+// Object -> null / null -> Object
+test_transition(fun5, {}, null, 1, 0);
+test_transition(fun6, null, {},  0, 1);
+// Symbol -> null, null -> Symbol
+test_transition(fun7, Symbol('hi'), null, 1, 0);
+test_transition(fun8, null, Symbol('lo'),  0, 1);
+\ No newline at end of file