1 files changed, 100 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/warp/function-load-name.js b/js/src/jit-test/tests/warp/function-load-name.js
new file mode 100644
index 0000000000..686ed32629
--- /dev/null
+++ b/js/src/jit-test/tests/warp/function-load-name.js
@@ -0,0 +1,100 @@
+// Test transpiling of LoadFunctionNameResult and cover possible bailout conditions.
+
+function empty() {}
+
+// Note: Typically won't use LoadFunctionNameResult, because the "name"
+// property will be resolved on the first access.
+function testGlobalFunction() {
+  for (var i = 0; i < 200; ++i) {
+    assertEq(empty.name, "empty");
+  }
+}
+testGlobalFunction();
+
+// Note: Typically won't use LoadFunctionNameResult, because the "name"
+// property will be resolved on the first access.
+function testInnerFunction() {
+  function f() {}
+  for (var i = 0; i < 200; ++i) {
+    assertEq(f.name, "f");
+  }
+}
+testInnerFunction();
+
+function testPerLoopFunction() {
+  for (var i = 0; i < 200; ++i) {
+    assertEq(function f(){}.name, "f");
+  }
+}
+testPerLoopFunction();
+
+// Note: Typically won't use LoadFunctionNameResult, because the "name"
+// property will be resolved on the first access.
+function testNativeFunction() {
+  for (var i = 0; i < 200; ++i) {
+    assertEq(Math.max.name, "max");
+  }
+}
+testNativeFunction();
+
+// Note: Typically won't use LoadFunctionNameResult, because the "name"
+// property will be resolved on the first access.
+function testSelfHostedFunction() {
+  for (var i = 0; i < 200; ++i) {
+    assertEq(Array.prototype.forEach.name, "forEach");
+  }
+}
+testSelfHostedFunction();
+
+// Bailout when the name property is resolved.
+function testBailoutResolvedName() {
+  function f1() {}
+
+  // Ensure the name property of |f1| is resolved.
+  assertEq(f1.name, "f1");
+
+  var names = ["f", "f1"];
+
+  for (var i = 0; i < 10; ++i) {
+    var name = names[0 + (i >= 5)];
+
+    for (var j = 0; j < 100; ++j) {
+      var values = [function f(){}, f1];
+      var value = values[0 + (i >= 5)];
+
+      assertEq(value.name, name);
+    }
+  }
+}
+testBailoutResolvedName();
+
+// Bailout when the HAS_BOUND_FUNCTION_NAME_PREFIX isn't set.
+function testBailoutBoundName() {
+  function f1() {}
+  function f2() {}
+
+  var bound = f1.bind();
+
+  // Ensure the name property of |bound| is resolved. That way new functions
+  // created through |bound().bind()| will have the HAS_BOUND_FUNCTION_NAME_PREFIX
+  // flag set.
+  assertEq(bound.name, "bound f1");
+
+  // |bound1| and |bound2| have the same shape, but different function flags.
+  var bound1 = bound.bind(); // HAS_BOUND_FUNCTION_NAME_PREFIX
+  var bound2 = f2.bind(); // ! HAS_BOUND_FUNCTION_NAME_PREFIX
+
+  var values = [bound1, bound2];
+  var names = ["bound bound bound f1", "bound bound f2"];
+
+  for (var i = 0; i < 10; ++i) {
+    var value = values[0 + (i >= 5)];
+    var name = names[0 + (i >= 5)];
+
+    for (var j = 0; j < 100; ++j) {
+      var f = value.bind();
+      assertEq(f.name, name);
+    }
+  }
+}
+testBailoutBoundName();