[turbofan] Introduce DeoptimizeIf And DeoptimizeUnless common operators.

src/compiler/code-generator-impl.h

Index: src/compiler/code-generator-impl.h
diff --git a/src/compiler/code-generator-impl.h b/src/compiler/code-generator-impl.h
index 729594839914b21a5a6c7b0026b0a45897598d70..7de32c5c9124120cf1441dc06353d7aecad1dad9 100644
--- a/src/compiler/code-generator-impl.h
+++ b/src/compiler/code-generator-impl.h
@@ -139,6 +139,19 @@ class InstructionOperandConverter {
   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 {