Allow TurboFan to compile more methods.

src/lithium.h

 // Copyright 2012 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.
 
 #ifndef V8_LITHIUM_H_
 #define V8_LITHIUM_H_
 
 #include <set>
 
 #include "src/allocation.h"
@@ skipping 234 matching lines @@
   }
   void set_virtual_register(unsigned id) {
     value_ = VirtualRegisterField::update(value_, id);
   }
 
   // [lifetime]: Only for non-FIXED_SLOT.
   bool IsUsedAtStart() {
     DCHECK(basic_policy() == EXTENDED_POLICY);
     return LifetimeField::decode(value_) == USED_AT_START;
   }
+
+  static bool TooManyParameters(int num_parameters) {
+    const int parameter_limit = -LUnallocated::kMinFixedSlotIndex;
+    return num_parameters + 1 > parameter_limit;
+  }
+
+  static bool TooManyParametersOrStackSlots(int num_parameters,
+                                            int num_stack_slots) {
+    const int locals_limit = LUnallocated::kMaxFixedSlotIndex;
+    return num_parameters + 1 + num_stack_slots > locals_limit;
+  }
 };
 
 
 class LMoveOperands final BASE_EMBEDDED {
  public:
   LMoveOperands(LOperand* source, LOperand* destination)
       : source_(source), destination_(destination) {
   }
 
   LOperand* source() const { return source_; }
@@ skipping 559 matching lines @@
  private:
   InputIterator input_iterator_;
   DeepIterator env_iterator_;
 };
 
 class LInstruction;
 class LCodeGen;
 } }  // namespace v8::internal
 
 #endif  // V8_LITHIUM_H_