[Test] Deoptimization and exception.

Simple example with exception handling and deoptimization.

BUG=v8:6563

Change-Id: I0a82b72e10f12355b2eb351fde3c1be84455da66
Reviewed-on: https://chromium-review.googlesource.com/645854
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47755}

test/mjsunit/compiler/deopt-simple-try-catch.js

+
+// Copyright 2017 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
+
+// Small program to test deoptimization with exception handling.
+
+function g() {
+  %DeoptimizeFunction(f);
+  throw 42;
+}
+%NeverOptimizeFunction(g);
+
+function f() {
+  var a = 1;
+  try {
+    g();
+  } catch (e) {
+    return e + a;
+  }
+}
+
+assertEquals(f(), 43);
+assertEquals(f(), 43);
+%OptimizeFunctionOnNextCall(f);
+assertEquals(f(), 43);