[crankshaft] HCallWithDescriptor is now able to pass arguments on the stack.

src/crankshaft/hydrogen-instructions.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_CRANKSHAFT_HYDROGEN_INSTRUCTIONS_H_
 #define V8_CRANKSHAFT_HYDROGEN_INSTRUCTIONS_H_
 
 #include <cstring>
 #include <iosfwd>
 
@@ skipping 2197 matching lines @@
   std::ostream& PrintDataTo(std::ostream& os) const override;  // NOLINT
 
  private:
   // The argument count includes the receiver.
   HCallWithDescriptor(HValue* target, int argument_count,
                       CallInterfaceDescriptor descriptor,
                       const Vector<HValue*>& operands,
                       TailCallMode syntactic_tail_call_mode,
                       TailCallMode tail_call_mode, Zone* zone)
       : descriptor_(descriptor),
-        values_(GetParameterCount() + 1, zone),
+        values_(GetParameterCount() + 1, zone),  // +1 here is for target.
         argument_count_(argument_count),
         bit_field_(
             TailCallModeField::encode(tail_call_mode) |
             SyntacticTailCallModeField::encode(syntactic_tail_call_mode)) {
     DCHECK_EQ(operands.length(), GetParameterCount());
     // We can only tail call without any stack arguments.
     DCHECK(tail_call_mode != TailCallMode::kAllow || argument_count == 0);
     AddOperand(target, zone);
     for (int i = 0; i < operands.length(); i++) {
       AddOperand(operands[i], zone);
     }
     this->set_representation(Representation::Tagged());
     this->SetAllSideEffects();
   }
 
   void AddOperand(HValue* v, Zone* zone) {
     values_.Add(NULL, zone);
     SetOperandAt(values_.length() - 1, v);
   }
 
   int GetParameterCount() const {
-    return descriptor_.GetRegisterParameterCount() + 1;
+    return descriptor_.GetParameterCount() + 1;  // +1 here is for context.
   }
 
   void InternalSetOperandAt(int index, HValue* value) final {
     values_[index] = value;
   }
 
   CallInterfaceDescriptor descriptor_;
   ZoneList<HValue*> values_;
   int argument_count_;
   class TailCallModeField : public BitField<TailCallMode, 0, 1> {};
@@ skipping 4786 matching lines @@
   bool IsDeletable() const override { return true; }
 };
 
 #undef DECLARE_INSTRUCTION
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_CRANKSHAFT_HYDROGEN_INSTRUCTIONS_H_