Migrated several tests from blink to V8 repository.

test/webkit/dfg-dead-variable-on-exit.js

Index: test/webkit/dfg-dead-variable-on-exit.js
diff --git a/test/webkit/concat-while-having-a-bad-time.js b/test/webkit/dfg-dead-variable-on-exit.js
similarity index 51%
copy from test/webkit/concat-while-having-a-bad-time.js
copy to test/webkit/dfg-dead-variable-on-exit.js
index dfda1e08a0b36194b787a44ee12a9693acd8aeaf..0f9f48c8cdb7863da7a47a2c320bacd44a912045 100644
--- a/test/webkit/concat-while-having-a-bad-time.js
+++ b/test/webkit/dfg-dead-variable-on-exit.js
@@ -22,10 +22,66 @@
 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 description(
-"Tests the behavior of Array.prototype.concat while the array is having a bad time due to one of the elements we are concatenating."
+"This tests that if a variable is dead on OSR exit, it will at least contain a valid JS value."
 );
 
-Object.defineProperty(Array.prototype, 0, { writable: false });
-shouldBe("[42].concat()", "[42]");
+var array = [];
 
+for (var i = 0; i < 9; ++i) {
+    var code = "";
+    code += "(function(";
+    for (var j = 0; j < i; ++j) {
+        if (j)
+            code += ", ";
+        code += "arg" + j;
+    }
+    code += ") {\n";
+    code += "    return ";
+    if (i) {
+        for (var j = 0; j < i; ++j) {
+            if (j)
+                code += " + ";
+            code += "arg" + j;
+        }
+    } else
+        code += "void 0";
+    code += ";\n";
+    code += "})";
+    array[i] = eval(code);
+}
+
+function foo(a, b) {
+    var x = 0;
+    if (a.f < b.f) {
+        var result = b.g - a.g;
+        x = !x;
+        return result;
+    } else {
+        var result = a.g - b.g;
+        x = [x];
+        return result;
+    }
+}
+
+var firstArg = {f:2, g:3};
+var secondArg = {f:3, g:4};
+
+for (var i = 0; i < 300; ++i) {
+    var code = "";
+    code += "array[" + (((i / 2) | 0) % array.length) + "](";
+    for (var j = 0; j < (((i / 2) | 0) % array.length); ++j) {
+        if (j)
+            code += ", ";
+        code += i + j;
+    }
+    if (i == 150) {
+        firstArg = {f:2, g:2.5};
+        secondArg = {f:3, g:3.5};
+    }
+    var tmp = firstArg;
+    firstArg = secondArg;
+    secondArg = tmp;
+    code += "); foo(firstArg, secondArg)";
+    shouldBe(code, "1");
+}