[turbofan] compute arguments length in deoptimizer

src/compiler/instruction-selector.cc

Index: src/compiler/instruction-selector.cc
diff --git a/src/compiler/instruction-selector.cc b/src/compiler/instruction-selector.cc
index e095bc20b38a3de322d68367bf393186c5432a84..88d201d08c1a4fe710b9ff4b838dd5592284a317 100644
--- a/src/compiler/instruction-selector.cc
+++ b/src/compiler/instruction-selector.cc
@@ -454,6 +454,7 @@ InstructionOperand OperandForDeopt(Isolate* isolate, OperandGenerator* g,
       return g->UseImmediate(input);
     }
     case IrOpcode::kArgumentsElementsState:
+    case IrOpcode::kArgumentsLengthState:
     case IrOpcode::kObjectState:
     case IrOpcode::kTypedObjectState:
       UNREACHABLE();
@@ -513,6 +514,10 @@ size_t InstructionSelector::AddOperandToStateValueDescriptor(
       values->PushArgumentsElements(IsRestOf(input->op()));
       return 0;
     }
+    case IrOpcode::kArgumentsLengthState: {
+      values->PushArgumentsLength(IsRestOf(input->op()));
+      return 0;
+    }
     case IrOpcode::kObjectState: {
       UNREACHABLE();
       return 0;