[turbofan] Introduce JSStackCheck operator.

src/compiler/verifier.cc

 // Copyright 2014 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.
 
 #include "src/compiler/verifier.h"
 
 #include <algorithm>
 #include <deque>
 #include <queue>
 #include <sstream>
@@ skipping 532 matching lines @@
       CheckUpperIs(node, Type::Receiver());
       break;
     case IrOpcode::kJSCallFunction:
     case IrOpcode::kJSCallRuntime:
     case IrOpcode::kJSYield:
     case IrOpcode::kJSDebugger:
       // Type can be anything.
       CheckUpperIs(node, Type::Any());
       break;
 
+    case IrOpcode::kJSStackCheck:
+      // Type is empty.
+      CheckNotTyped(node);
+      break;
+
     // Simplified operators
     // -------------------------------
     case IrOpcode::kAnyToBoolean:
       // Type is Boolean.
       CheckUpperIs(node, Type::Boolean());
       break;
     case IrOpcode::kBooleanNot:
       // Boolean -> Boolean
       CheckValueInputIs(node, 0, Type::Boolean());
       CheckUpperIs(node, Type::Boolean());
@@ skipping 494 matching lines @@
     // Check inputs for all nodes in the block.
     for (size_t i = 0; i < block->NodeCount(); i++) {
       Node* node = block->NodeAt(i);
       CheckInputsDominate(schedule, block, node, static_cast<int>(i) - 1);
     }
   }
 }
 }
 }
 }  // namespace v8::internal::compiler