[turbofan] compute arguments length in deoptimizer

src/compiler/instruction-selector.cc

 // Copyright 2014 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.
 
 #include "src/compiler/instruction-selector.h"
 
 #include <limits>
 
 #include "src/base/adapters.h"
 #include "src/compiler/compiler-source-position-table.h"
@@ skipping 436 matching lines @@
       if (isolate->heap()->IsRootHandle(constant, &root_index) &&
           root_index == Heap::kOptimizedOutRootIndex) {
         // For an optimized-out object we return an invalid instruction
         // operand, so that we take the fast path for optimized-out values.
         return InstructionOperand();
       }
 
       return g->UseImmediate(input);
     }
     case IrOpcode::kArgumentsElementsState:
+    case IrOpcode::kArgumentsLengthState:
     case IrOpcode::kObjectState:
     case IrOpcode::kTypedObjectState:
       UNREACHABLE();
       break;
     default:
       switch (kind) {
         case FrameStateInputKind::kStackSlot:
           return g->UseUniqueSlot(input);
         case FrameStateInputKind::kAny:
           // Currently deopts "wrap" other operations, so the deopt's inputs
@@ skipping 39 matching lines @@
   if (input == nullptr) {
     values->PushOptimizedOut();
     return 0;
   }
 
   switch (input->opcode()) {
     case IrOpcode::kArgumentsElementsState: {
       values->PushArgumentsElements(IsRestOf(input->op()));
       return 0;
     }
+    case IrOpcode::kArgumentsLengthState: {
+      values->PushArgumentsLength(IsRestOf(input->op()));
+      return 0;
+    }
     case IrOpcode::kObjectState: {
       UNREACHABLE();
       return 0;
     }
     case IrOpcode::kTypedObjectState: {
       size_t id = deduplicator->GetObjectId(input);
       if (id == StateObjectDeduplicator::kNotDuplicated) {
         size_t entries = 0;
         id = deduplicator->InsertObject(input);
         StateValueList* nested = values->PushRecursiveField(zone, id);
@@ skipping 2172 matching lines @@
   return new (instruction_zone()) FrameStateDescriptor(
       instruction_zone(), state_info.type(), state_info.bailout_id(),
       state_info.state_combine(), parameters, locals, stack,
       state_info.shared_info(), outer_state);
 }
 
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8