[turbofan] Lower ConsString creation in JSTypedLowering.

test/mjsunit/compiler/string-add-try-catch.js

Index: test/mjsunit/compiler/string-add-try-catch.js
diff --git a/test/mjsunit/compiler/string-add-try-catch.js b/test/mjsunit/compiler/string-add-try-catch.js
new file mode 100644
index 0000000000000000000000000000000000000000..e34332682c09826b09a06a407ee90847547e6f67
--- /dev/null
+++ b/test/mjsunit/compiler/string-add-try-catch.js
@@ -0,0 +1,39 @@
+// Copyright 2016 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --allow-natives-syntax
+
+var a = "a".repeat(268435440);
+
+(function() {
+  function foo(a, b) {
+    try {
+      return a + "0123456789012";
+    } catch (e) {
+      return e;
+    }
+  }
+
+  foo("a");
+  foo("a");
+  %OptimizeFunctionOnNextCall(foo);
+  foo("a");
+  assertInstanceof(foo(a), RangeError);
+})();
+
+(function() {
+  function foo(a, b) {
+    try {
+      return "0123456789012" + a;
+    } catch (e) {
+      return e;
+    }
+  }
+
+  foo("a");
+  foo("a");
+  %OptimizeFunctionOnNextCall(foo);
+  foo("a");
+  assertInstanceof(foo(a), RangeError);
+})();