X87: Do not add extra argument for new.target.

src/x87/builtins-x87.cc

 // 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.
 
 #include "src/v8.h"
 
 #if V8_TARGET_ARCH_X87
 
 #include "src/code-factory.h"
 #include "src/codegen.h"
@@ skipping 520 matching lines @@
     // Copy arguments and receiver to the expression stack.
     Label loop, entry;
     __ mov(ecx, eax);
     __ jmp(&entry);
     __ bind(&loop);
     __ push(Operand(ebx, ecx, times_4, 0));
     __ bind(&entry);
     __ dec(ecx);
     __ j(greater_equal, &loop);
 
-    __ inc(eax);  // Pushed new.target.
-
-
     // Handle step in.
     Label skip_step_in;
     ExternalReference debug_step_in_fp =
         ExternalReference::debug_step_in_fp_address(masm->isolate());
     __ cmp(Operand::StaticVariable(debug_step_in_fp), Immediate(0));
     __ j(equal, &skip_step_in);
 
     __ push(eax);
     __ push(edi);
     __ push(edi);
     __ CallRuntime(Runtime::kHandleStepInForDerivedConstructors, 1);
     __ pop(edi);
     __ pop(eax);
 
     __ bind(&skip_step_in);
 
     // Invoke function.
     ParameterCount actual(eax);
     __ InvokeFunction(edi, actual, CALL_FUNCTION, NullCallWrapper());
 
     // Restore context from the frame.
     __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset));
 
-    __ mov(ebx, Operand(esp, 0));
+    // Get arguments count, skipping over new.target.
+    __ mov(ebx, Operand(esp, kPointerSize));
   }
 
   __ pop(ecx);  // Return address.
   __ lea(esp, Operand(esp, ebx, times_2, 1 * kPointerSize));
   __ push(ecx);
   __ ret(0);
 }
 
 
 enum IsTagged { kEaxIsSmiTagged, kEaxIsUntaggedInt };
@@ skipping 1138 matching lines @@
 
   __ bind(&ok);
   __ ret(0);
 }
 
 #undef __
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X87