[builtins] support exception handling in TFJ builtins

src/compiler/raw-machine-assembler.h

 // 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.
 
 #ifndef V8_COMPILER_RAW_MACHINE_ASSEMBLER_H_
 #define V8_COMPILER_RAW_MACHINE_ASSEMBLER_H_
 
 #include "src/assembler.h"
 #include "src/compiler/common-operator.h"
 #include "src/compiler/graph.h"
@@ skipping 740 matching lines @@
   void Switch(Node* index, RawMachineLabel* default_label,
               const int32_t* case_values, RawMachineLabel** case_labels,
               size_t case_count);
   void Return(Node* value);
   void Return(Node* v1, Node* v2);
   void Return(Node* v1, Node* v2, Node* v3);
   void Bind(RawMachineLabel* label);
   void Deoptimize(Node* state);
   void DebugBreak();
   void Comment(const char* msg);
+  // Add success / exception successor blocks to a block ending with a throwing

[Michael Starzinger, 2016/08/19 18:37:43]

nit: What do you think about phrasing the comment as: "Add success / exception
successor blocks and ends the current basic block with a potentially throwing
call node." instead? Also add an empty newline before the comment for
readability.

[caitp, 2016/08/19 20:37:11]

sgtm, done

+  // opcode.
+  void Continuations(Node* call, RawMachineLabel* if_success,
+                     RawMachineLabel* if_exception);
 
   // Variables.
   Node* Phi(MachineRepresentation rep, Node* n1, Node* n2) {
     return AddNode(common()->Phi(rep, 2), n1, n2, graph()->start());
   }
   Node* Phi(MachineRepresentation rep, Node* n1, Node* n2, Node* n3) {
     return AddNode(common()->Phi(rep, 3), n1, n2, n3, graph()->start());
   }
   Node* Phi(MachineRepresentation rep, Node* n1, Node* n2, Node* n3, Node* n4) {
     return AddNode(common()->Phi(rep, 4), n1, n2, n3, n4, graph()->start());
@@ skipping 55 matching lines @@
   bool deferred_;
   friend class RawMachineAssembler;
   DISALLOW_COPY_AND_ASSIGN(RawMachineLabel);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_RAW_MACHINE_ASSEMBLER_H_