[turbofan] Handle stack overflow during inlining.

This handles the case where generating bytecode for inlining purposes
causes a stack overflow. We just abort inlining but also need to clear
pending exceptions.

R=bmeurer@chromium.org
TEST=mjsunit/regress/regress-crbug-647217
BUG=chromium:647217

Review-Url: https://codereview.chromium.org/2339383002
Cr-Commit-Position: refs/heads/master@{#39448}

src/compiler/js-inlining.cc

@@ -482,7 +482,9 @@ Reduction JSInliner::ReduceJSCall(Node* node, Handle<JSFunction> function) {
     TRACE("Not inlining %s into %s because bytecode generation failed\n",
           shared_info->DebugName()->ToCString().get(),
           info_->shared_info()->DebugName()->ToCString().get());
-    DCHECK(!info_->isolate()->has_pending_exception());
+    if (info_->isolate()->has_pending_exception()) {
+      info_->isolate()->clear_pending_exception();
+    }
     return NoChange();
   }
 

test/mjsunit/regress/regress-crbug-647217.js

+// 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 --stack-size=100 --ignition-staging --turbo
+
+var source = "return 1" + new Array(2048).join(' + a') + "";
+eval("function g(a) {" + source + "}");
+%SetForceInlineFlag(g);
+
+function f(a) { return g(a) }
+%OptimizeFunctionOnNextCall(f);
+try { f(0) } catch(e) {}