Model exceptional edges from call nodes in TurboFan.

src/compiler/opcodes.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_OPCODES_H_
 #define V8_COMPILER_OPCODES_H_
 
 // Opcodes for control operators.
 #define INNER_CONTROL_OP_LIST(V) \
   V(Dead)                        \
   V(Loop)                        \
   V(Branch)                      \
   V(IfTrue)                      \
   V(IfFalse)                     \
+  V(IfException)                 \
+  V(IfSuccess)                   \
   V(Switch)                      \
   V(Case)                        \
   V(Merge)                       \
   V(Return)                      \
   V(OsrNormalEntry)              \
   V(OsrLoopEntry)                \
   V(Throw)
 
 #define CONTROL_OP_LIST(V) \
   INNER_CONTROL_OP_LIST(V) \
@@ skipping 266 matching lines @@
   // Returns true if opcode for JavaScript operator.
   static bool IsJsOpcode(Value value) {
     return kJSEqual <= value && value <= kJSDebugger;
   }
 
   // Returns true if opcode for constant operator.
   static bool IsConstantOpcode(Value value) {
     return kInt32Constant <= value && value <= kHeapConstant;
   }
 
-  static bool IsPhiOpcode(Value val) {
-    return val == kPhi || val == kEffectPhi;
+  static bool IsPhiOpcode(Value value) {
+    return value == kPhi || value == kEffectPhi;
+  }
+
+  static bool IsMergeOpcode(Value value) {
+    return value == kMerge || value == kLoop;
   }
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_OPCODES_H_