Model exceptional edges from call nodes in TurboFan.

src/compiler/operator.h

 // Copyright 2013 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.
 
 #ifndef V8_COMPILER_OPERATOR_H_
 #define V8_COMPILER_OPERATOR_H_
 
 #include <ostream>  // NOLINT(readability/streams)
 
 #include "src/base/flags.h"
@@ skipping 79 matching lines @@
 
   // TODO(titzer): convert return values here to size_t.
   int ValueInputCount() const { return value_in_; }
   int EffectInputCount() const { return effect_in_; }
   int ControlInputCount() const { return control_in_; }
 
   int ValueOutputCount() const { return value_out_; }
   int EffectOutputCount() const { return effect_out_; }
   int ControlOutputCount() const { return control_out_; }
 
+  static size_t ZeroIfNoThrow(Properties properties) {
+    return (properties & kNoThrow) == kNoThrow ? 0 : 2;
+  }
+
   static size_t ZeroIfPure(Properties properties) {
     return (properties & kPure) == kPure ? 0 : 1;
   }
 
   // TODO(titzer): API for input and output types, for typechecking graph.
  protected:
   // Print the full operator into the given stream, including any
   // static parameters. Useful for debugging and visualizing the IR.
   virtual void PrintTo(std::ostream& os) const;
   friend std::ostream& operator<<(std::ostream& os, const Operator& op);
@@ skipping 80 matching lines @@
   return reinterpret_cast<const Operator1<double, base::bit_equal_to<double>,
                                           base::bit_hash<double>>*>(op)
       ->parameter();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_OPERATOR_H_