[turbofan] Add test coverage for deopt within try-catch.

This just contains test, no fixes. Note that some of the tests are
still disabled because they either fail or we don't want ClusterFuzz
to pick up the flag yet.

R=jarin@chromium.org
TEST=cctest/test-run-jsexceptions/Deopt,mjsunit/compiler/try-deopt

Review URL: https://codereview.chromium.org/972943004

Cr-Commit-Position: refs/heads/master@{#26968}

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

@@ -182,3 +182,78 @@ TEST(FinallyBreak) {
   T.CheckCall(T.Val("-A-B-D-"), T.false_value(), T.true_value());
   T.CheckCall(T.Val("-A-B-C-D-"), T.false_value(), T.false_value());
 }
+
+
+TEST(DeoptTry) {
+  i::FLAG_turbo_exceptions = true;
+  i::FLAG_turbo_deoptimization = true;
+  const char* src =
+      "(function f(a) {"
+      "  try {"
+      "    %DeoptimizeFunction(f);"
+      "    throw a;"
+      "  } catch (e) {"
+      "    return e + 1;"
+      "  }"
+      "})";
+  FunctionTester T(src);
+
+#if 0  // TODO(mstarzinger): Enable once we can.
+  T.CheckCall(T.Val(2), T.Val(1));
+#endif
+}
+
+
+TEST(DeoptCatch) {
+  i::FLAG_turbo_exceptions = true;
+  i::FLAG_turbo_deoptimization = true;
+  const char* src =
+      "(function f(a) {"
+      "  try {"
+      "    throw a;"
+      "  } catch (e) {"
+      "    %DeoptimizeFunction(f);"
+      "    return e + 1;"
+      "  }"
+      "})";
+  FunctionTester T(src);
+
+  T.CheckCall(T.Val(2), T.Val(1));
+}
+
+
+TEST(DeoptFinallyReturn) {
+  i::FLAG_turbo_exceptions = true;
+  i::FLAG_turbo_deoptimization = true;
+  const char* src =
+      "(function f(a) {"
+      "  try {"
+      "    throw a;"
+      "  } finally {"
+      "    %DeoptimizeFunction(f);"
+      "    return a + 1;"
+      "  }"
+      "})";
+  FunctionTester T(src);
+
+  T.CheckCall(T.Val(2), T.Val(1));
+}
+
+
+TEST(DeoptFinallyReThrow) {
+  i::FLAG_turbo_exceptions = true;
+  i::FLAG_turbo_deoptimization = true;
+  const char* src =
+      "(function f(a) {"
+      "  try {"
+      "    throw a;"
+      "  } finally {"
+      "    %DeoptimizeFunction(f);"
+      "  }"
+      "})";
+  FunctionTester T(src);
+
+#if 0  // TODO(mstarzinger): Enable once we can.
+  T.CheckThrows(T.NewObject("new Error"), T.Val(1));
+#endif
+}

test/mjsunit/compiler/try-deopt.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.
+
+// TODO(mstarzinger): Add FLAG_turbo_exceptions once we want ClusterFuzz.
+// Flags: --allow-natives-syntax --turbo-deoptimization
+
+function DeoptFromTry(x) {
+  try {
+    %DeoptimizeFunction(DeoptFromTry);
+    throw x;
+  } catch (e) {
+    return e + 1;
+  }
+  return x + 2;
+}
+%OptimizeFunctionOnNextCall(DeoptFromTry);
+assertEquals(24, DeoptFromTry(23));
+
+
+function DeoptFromCatch(x) {
+  try {
+    throw x;
+  } catch (e) {
+    %DeoptimizeFunction(DeoptFromCatch);
+    return e + 1;
+  }
+  return x + 2;
+}
+%OptimizeFunctionOnNextCall(DeoptFromCatch);
+assertEquals(24, DeoptFromCatch(23));
+
+
+function DeoptFromFinally_Return(x) {
+  try {
+    throw x;
+  } finally {
+    %DeoptimizeFunction(DeoptFromFinally_Return);
+    return x + 1;
+  }
+  return x + 2;
+}
+%OptimizeFunctionOnNextCall(DeoptFromFinally_Return);
+assertEquals(24, DeoptFromFinally_Return(23));
+
+
+function DeoptFromFinally_ReThrow(x) {
+  try {
+    throw x;
+  } finally {
+    %DeoptimizeFunction(DeoptFromFinally_ReThrow);
+  }
+  return x + 2;
+}
+%OptimizeFunctionOnNextCall(DeoptFromFinally_ReThrow);
+assertThrows("DeoptFromFinally_ReThrow(new Error)", Error);