Merge bleeding edge up to 9192 into the GC branch.

test/mjsunit/harmony/block-let-crankshaft.js

Index: test/mjsunit/harmony/block-let-crankshaft.js
diff --git a/test/mjsunit/regress/regress-1110.js b/test/mjsunit/harmony/block-let-crankshaft.js
similarity index 73%
copy from test/mjsunit/regress/regress-1110.js
copy to test/mjsunit/harmony/block-let-crankshaft.js
index 204a87ba3d16743a945fb2fb5817538fd43e7315..c2fb96b6a48ea6eb432595ef0591b9939a60f8f5 100644
--- a/test/mjsunit/regress/regress-1110.js
+++ b/test/mjsunit/harmony/block-let-crankshaft.js
@@ -25,14 +25,39 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-// Test that the illegal continue is thrown at parse time.
+// Flags: --harmony-block-scoping --allow-natives-syntax
+
+// Test that temporal dead zone semantics for function and block scoped
+// ket bindings are handled by the optimizing compiler.
+
+function f(x, b) {
+  let y = (b ? y : x) + 42;
+  return y;
+}
+
+function g(x, b) {
+  {
+    let y = (b ? y : x) + 42;
+    return y;
+  }
+}
+
+for (var i=0; i<10; i++) {
+  f(i, false);
+  g(i, false);
+}
+
+%OptimizeFunctionOnNextCall(f);
+%OptimizeFunctionOnNextCall(g);
+
+try {
+  f(42, true);
+} catch (e) {
+  assertInstanceof(e, ReferenceError);
+}
 
 try {
-  function Crash() { continue;if (Crash) {
-    } } 
-  Crash();
-  assertTrue(false);
+  g(42, true);
 } catch (e) {
-  assertTrue(e instanceof SyntaxError);
-  assertTrue(/continue/.test(e.message));
+  assertInstanceof(e, ReferenceError);
 }