[turbofan] Don't try to inline non-inlineable functions.

R=mstarzinger@chromium.org
BUG=chromium:540593
LOG=n

Review URL: https://codereview.chromium.org/1395453002

Cr-Commit-Position: refs/heads/master@{#31145}

src/compiler/js-inlining.cc

@@ -254,6 +254,14 @@ Reduction JSInliner::Reduce(Node* node) {
     return NoChange();
   }
 
+  if (!function->shared()->IsInlineable()) {
+    // Function must be inlineable.
+    TRACE("Not inlining %s into %s because callee is not inlineable\n",
+          function->shared()->DebugName()->ToCString().get(),
+          info_->shared_info()->DebugName()->ToCString().get());
+    return NoChange();
+  }
+
   if (function->shared()->HasDebugInfo()) {
     // Function contains break points.
     TRACE("Not inlining %s into %s because callee may contain break points\n",

test/mjsunit/compiler/regress-crbug-540593.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 --enable-slow-asserts --turbo-inlining
+
+var __f_2 = (function(stdlib) {
+  "use asm";
+  var __v_3 = stdlib.Symbol;
+  function __f_2() { return __v_3(); }
+  return __f_2;
+})(this);
+%OptimizeFunctionOnNextCall(__f_2);
+__f_2();