[turbofan] Add mjsunit tests for try-catch-finally and OSR.

This adds some basic tests of the interaction between try-catch and
try-finally statements and OSR in TurboFan. The try-osr test suite
follows the structure of try-deopt closely.

R=titzer@chromium.org
TEST=mjsunit/compiler/try-osr

Review URL: https://codereview.chromium.org/1165103003

Cr-Commit-Position: refs/heads/master@{#28855}

test/cctest/compiler/test-run-jsexceptions.cc

@@ -80,10 +80,6 @@ TEST(ThrowMessageIndirectly) {
 }
 
 
-// TODO(mstarzinger): Increase test coverage by having similar tests within the
-// mjsunit suite to also test integration with other components (e.g. OSR).
-
-
 TEST(Catch) {
   i::FLAG_turbo_try_catch = true;
   const char* src =

test/mjsunit/compiler/try-osr.js

+// Copyright 2015 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 --turbo-osr
+
+function OSRInsideTry(x) {
+  try {
+    for (var i = 0; i < 10; i++) { if (i == 5) %OptimizeOsr(); }
+    throw x;
+  } catch (e) {
+    return e + 1;
+  }
+  return x + 2;
+}
+assertEquals(24, OSRInsideTry(23));
+
+
+function OSRInsideCatch(x) {
+  try {
+    throw x;
+  } catch (e) {
+    for (var i = 0; i < 10; i++) { if (i == 5) %OptimizeOsr(); }
+    return e + 1;
+  }
+  return x + 2;
+}
+assertEquals(24, OSRInsideCatch(23));
+
+
+function OSRInsideFinally_Return(x) {
+  try {
+    throw x;
+  } finally {
+    for (var i = 0; i < 10; i++) { if (i == 5) %OptimizeOsr(); }
+    return x + 1;
+  }
+  return x + 2;
+}
+assertEquals(24, OSRInsideFinally_Return(23));
+
+
+function OSRInsideFinally_ReThrow(x) {
+  try {
+    throw x;
+  } finally {
+    for (var i = 0; i < 10; i++) { if (i == 5) %OptimizeOsr(); }
+  }
+  return x + 2;
+}
+assertThrows("OSRInsideFinally_ReThrow(new Error)", Error);