[turbofan] Add the StackSlot operator to turbofan.

src/compiler/instruction-selector.h

Index: src/compiler/instruction-selector.h
diff --git a/src/compiler/instruction-selector.h b/src/compiler/instruction-selector.h
index 52aea70eb6f2a4ada099131c11c74251bed937a2..33c0b9bba01a43c28f4a80ab5b81ce6340a57d32 100644
--- a/src/compiler/instruction-selector.h
+++ b/src/compiler/instruction-selector.h
@@ -52,7 +52,7 @@ class InstructionSelector final {
   InstructionSelector(
       Zone* zone, size_t node_count, Linkage* linkage,
       InstructionSequence* sequence, Schedule* schedule,
-      SourcePositionTable* source_positions,
+      SourcePositionTable* source_positions, Frame* frame,
       SourcePositionMode source_position_mode = kCallSourcePositions,
       Features features = SupportedFeatures());
 
@@ -271,6 +271,7 @@ class InstructionSelector final {
   BoolVector used_;
   IntVector virtual_registers_;
   InstructionScheduler* scheduler_;
+  Frame* frame_;
 };
 
 }  // namespace compiler