[turbofan] Introduce DeoptimizeIf And DeoptimizeUnless common operators.

src/compiler/code-generator-impl.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_CODE_GENERATOR_IMPL_H_
 #define V8_COMPILER_CODE_GENERATOR_IMPL_H_
 
 #include "src/code-stubs.h"
 #include "src/compiler/code-generator.h"
 #include "src/compiler/instruction.h"
@@ skipping 121 matching lines @@
     return gen_->frame_access_state();
   }
   Isolate* isolate() const { return gen_->isolate(); }
   Linkage* linkage() const { return gen_->linkage(); }
 
  protected:
   CodeGenerator* gen_;
   Instruction* instr_;
 };
 
+// Eager deoptimization exit.
+class DeoptimizationExit : public ZoneObject {
+ public:
+  explicit DeoptimizationExit(int deoptimization_id)
+      : deoptimization_id_(deoptimization_id) {}
+
+  int deoptimization_id() const { return deoptimization_id_; }
+  Label* label() { return &label_; }
+
+ private:
+  int const deoptimization_id_;
+  Label label_;
+};
 
 // Generator for out-of-line code that is emitted after the main code is done.
 class OutOfLineCode : public ZoneObject {
  public:
   explicit OutOfLineCode(CodeGenerator* gen);
   virtual ~OutOfLineCode();
 
   virtual void Generate() = 0;
 
   Label* entry() { return &entry_; }
@@ skipping 20 matching lines @@
 #elif V8_TARGET_ARCH_IA32 || V8_TARGET_ARCH_X64
   masm->ud2();
 #endif
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_CODE_GENERATOR_IMPL_H