[turbofan] Ensure lazy bailout point in exception handler.

src/compiler/instruction.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_INSTRUCTION_H_
 #define V8_COMPILER_INSTRUCTION_H_
 
 #include <deque>
 #include <iosfwd>
 #include <map>
@@ skipping 912 matching lines @@
   const int virtual_register_;
   InstructionOperand output_;
   IntVector operands_;
 };
 
 
 // Analogue of BasicBlock for Instructions instead of Nodes.
 class InstructionBlock final : public ZoneObject {
  public:
   InstructionBlock(Zone* zone, RpoNumber rpo_number, RpoNumber loop_header,
-                   RpoNumber loop_end, bool deferred);
+                   RpoNumber loop_end, bool deferred, bool handler);
 
   // Instruction indexes (used by the register allocator).
   int first_instruction_index() const {
     DCHECK(code_start_ >= 0);
     DCHECK(code_end_ > 0);
     DCHECK(code_end_ >= code_start_);
     return code_start_;
   }
   int last_instruction_index() const {
     DCHECK(code_start_ >= 0);
     DCHECK(code_end_ > 0);
     DCHECK(code_end_ >= code_start_);
     return code_end_ - 1;
   }
 
   int32_t code_start() const { return code_start_; }
   void set_code_start(int32_t start) { code_start_ = start; }
 
   int32_t code_end() const { return code_end_; }
   void set_code_end(int32_t end) { code_end_ = end; }
 
   bool IsDeferred() const { return deferred_; }
+  bool IsHandler() const { return handler_; }
 
   RpoNumber ao_number() const { return ao_number_; }
   RpoNumber rpo_number() const { return rpo_number_; }
   RpoNumber loop_header() const { return loop_header_; }
   RpoNumber loop_end() const {
     DCHECK(IsLoopHeader());
     return loop_end_;
   }
   inline bool IsLoopHeader() const { return loop_end_.IsValid(); }
 
@@ skipping 27 matching lines @@
   Successors successors_;
   Predecessors predecessors_;
   PhiInstructions phis_;
   RpoNumber ao_number_;  // Assembly order number.
   const RpoNumber rpo_number_;
   const RpoNumber loop_header_;
   const RpoNumber loop_end_;
   int32_t code_start_;   // start index of arch-specific code.
   int32_t code_end_;     // end index of arch-specific code.
   const bool deferred_;  // Block contains deferred code.
+  const bool handler_;   // Block is a handler entry point.
   bool needs_frame_;
   bool must_construct_frame_;
   bool must_deconstruct_frame_;
 };
 
 typedef ZoneDeque<Constant> ConstantDeque;
 typedef std::map<int, Constant, std::less<int>,
                  zone_allocator<std::pair<int, Constant> > > ConstantMap;
 
 typedef ZoneDeque<Instruction*> InstructionDeque;
@@ skipping 186 matching lines @@
 
 
 std::ostream& operator<<(std::ostream& os,
                          const PrintableInstructionSequence& code);
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_INSTRUCTION_H_