[turbofan] Introduce DeoptimizeIf And DeoptimizeUnless common operators.

src/compiler/code-generator.h

Index: src/compiler/code-generator.h
diff --git a/src/compiler/code-generator.h b/src/compiler/code-generator.h
index 70bf81f5afede940cbe927afbaf315e3e1ef0891..fcdd5961a9ef719627317c7aabafdaf921cbc016 100644
--- a/src/compiler/code-generator.h
+++ b/src/compiler/code-generator.h
@@ -16,6 +16,7 @@ namespace internal {
 namespace compiler {
 
 // Forward declarations.
+class DeoptimizationExit;
 class FrameAccessState;
 class Linkage;
 class OutOfLineCode;
@@ -144,10 +145,10 @@ class CodeGenerator final : public GapResolver::Assembler {
   void RecordCallPosition(Instruction* instr);
   void PopulateDeoptimizationData(Handle<Code> code);
   int DefineDeoptimizationLiteral(Handle<Object> literal);
-  FrameStateDescriptor* GetFrameStateDescriptor(
-      Instruction* instr, size_t frame_access_state_offset);
+  FrameStateDescriptor* GetFrameStateDescriptor(Instruction* instr,
+                                                size_t frame_state_offset);
   int BuildTranslation(Instruction* instr, int pc_offset,
-                       size_t frame_access_state_offset,
+                       size_t frame_state_offset,
                        OutputFrameStateCombine state_combine);
   void BuildTranslationForFrameStateDescriptor(
       FrameStateDescriptor* descriptor, InstructionOperandIterator* iter,
@@ -165,6 +166,9 @@ class CodeGenerator final : public GapResolver::Assembler {
   void EnsureSpaceForLazyDeopt();
   void MarkLazyDeoptSite();
 
+  DeoptimizationExit* AddDeoptimizationExit(Instruction* instr,
+                                            size_t frame_state_offset);
+
   // Converts the delta in the number of stack parameter passed from a tail
   // caller to the callee into the distance (in pointers) the SP must be
   // adjusted, taking frame elision and other relevant factors into
@@ -210,6 +214,7 @@ class CodeGenerator final : public GapResolver::Assembler {
   GapResolver resolver_;
   SafepointTableBuilder safepoints_;
   ZoneVector<HandlerInfo> handlers_;
+  ZoneDeque<DeoptimizationExit*> deoptimization_exits_;
   ZoneDeque<DeoptimizationState*> deoptimization_states_;
   ZoneDeque<Handle<Object>> deoptimization_literals_;
   size_t inlined_function_count_;