1 files changed, 78 insertions, 0 deletions
diff --git a/js/src/jit-test/etc/generate-nosuchproperty-tests.js b/js/src/jit-test/etc/generate-nosuchproperty-tests.js
new file mode 100644
index 0000000000..a0bb3e47db
--- /dev/null
+++ b/js/src/jit-test/etc/generate-nosuchproperty-tests.js
@@ -0,0 +1,78 @@
+
+// This code generates the test cases jit-test/tests/baseline/no-such-property-getprop.js
+//
+// In particular, it generates the testChain_<N>_<I>() and runChain_<N>_<I>() functions
+// at the tail of the file.
+
+var TEST_CASE_FUNCS =  [];
+function runChain_NNNN_DDDD(obj) {
+    var sum = 0;
+    for (var i = 0; i < 100; i++)
+        sum += obj.foo;
+    return sum;
+}
+function testChain_NNNN_DDDD() {
+    var obj = createTower(NNNN);
+    assertEq(runChain_NNNN_DDDD(obj), NaN);
+    updateChain(obj, DDDD, 'foo', 9);
+    assertEq(runChain_NNNN_DDDD(obj), 900);
+}
+function generateTestCase(n, d) {
+    var runFuncName = "runChain_" + n + "_" + d;
+    var testFuncName = "testChain_" + n + "_" + d;
+    TEST_CASE_FUNCS.push(testFuncName);
+
+    print("//// Test chain of length " + n + " with late-property-addition at depth " + d);
+    print(String(runChain_NNNN_DDDD).replace(/NNNN/g, ''+n).replace(/DDDD/g, ''+d));
+    print(String(testChain_NNNN_DDDD).replace(/NNNN/g, ''+n).replace(/DDDD/g, ''+d));
+    print("");
+}
+
+// Helper function to create an object with a proto-chain of length N.
+function createTower(n) {
+    var result = Object.create(null);
+    for (var i = 0; i < n; i++)
+        result = Object.create(result);
+    return result;
+}
+
+function updateChain(obj, depth, prop, value) {
+    // Walk down the proto chain |depth| iterations and set |prop| to |value|.
+    var cur = obj;
+    for (var i = 0; i < depth; i++)
+        cur = Object.getPrototypeOf(cur);
+
+    var desc = {value:value, writable:true, configurable:true, enumerable:true};
+    Object.defineProperty(cur, prop, desc);
+}
+
+print("/////////////////////////////////////////");
+print("// This is a generated file!");
+print("// See jit-tests/etc/generate-nosuchproperty-tests.js for the code");
+print("// that generated this code!");
+print("/////////////////////////////////////////");
+print("");
+print("/////////////////////////////////////////");
+print("// PRELUDE                             //");
+print("/////////////////////////////////////////");
+print("");
+print(createTower);
+print(updateChain);
+print("");
+print("/////////////////////////////////////////");
+print("// TEST CASES                          //");
+print("/////////////////////////////////////////");
+print("");
+for (var n = 0; n <= 10; n++) {
+    for (var d = 0; d <= n; d++) {
+        generateTestCase(n, d);
+    }
+}
+
+print("");
+print("/////////////////////////////////////////");
+print("// RUNNER                              //");
+print("/////////////////////////////////////////");
+print("");
+for (var i = 0; i < TEST_CASE_FUNCS.length; i++)
+    print(TEST_CASE_FUNCS[i] + "();");