[turbofan] Frame elision for code stubs

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 794 matching lines @@
     opcode_ = ArchOpcodeField::encode(kArchNop);
     bit_field_ = 0;
     reference_map_ = nullptr;
   }
 
   bool IsNop() const {
     return arch_opcode() == kArchNop && InputCount() == 0 &&
            OutputCount() == 0 && TempCount() == 0;
   }
 
+  bool IsDeoptimizeCall() const {
+    return arch_opcode() == ArchOpcode::kArchDeoptimize ||
+           FlagsModeField::decode(opcode()) == kFlags_deoptimize;
+  }
+
+  bool IsJump() const { return arch_opcode() == ArchOpcode::kArchJmp; }
+
+  bool IsBranch() const {
+    return FlagsModeField::decode(opcode()) == kFlags_branch;
+  }
+
+  bool IsRet() const { return arch_opcode() == ArchOpcode::kArchRet; }
+
   enum GapPosition {
     START,
     END,
     FIRST_GAP_POSITION = START,
     LAST_GAP_POSITION = END
   };
 
   ParallelMove* GetOrCreateParallelMove(GapPosition pos, Zone* zone) {
     if (parallel_moves_[pos] == nullptr) {
       parallel_moves_[pos] = new (zone) ParallelMove(zone);
@@ skipping 563 matching lines @@
 
 
 std::ostream& operator<<(std::ostream& os,
                          const PrintableInstructionSequence& code);
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_INSTRUCTION_H_