Do not add extra argument for new.target

src/mips/builtins-mips.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_MIPS
 
@@ skipping 781 matching lines @@
     __ Branch(&entry);
     __ bind(&loop);
     __ sll(at, t0, kPointerSizeLog2 - 1);
     __ Addu(at, a2, Operand(at));
     __ lw(at, MemOperand(at));
     __ push(at);
     __ bind(&entry);
     __ Subu(t0, t0, Operand(2));
     __ Branch(&loop, ge, t0, Operand(zero_reg));
 
-    __ Addu(a0, a0, Operand(1));
-
     // Handle step in.
     Label skip_step_in;
     ExternalReference debug_step_in_fp =
         ExternalReference::debug_step_in_fp_address(masm->isolate());
     __ li(a2, Operand(debug_step_in_fp));
     __ lw(a2, MemOperand(a2));
     __ Branch(&skip_step_in, eq, a2, Operand(zero_reg));
 
     __ Push(a0, a1, a1);
     __ CallRuntime(Runtime::kHandleStepInForDerivedConstructors, 1);
     __ Pop(a0, a1);
 
     __ bind(&skip_step_in);
 
     // Call the function.
     // a0: number of arguments
     // a1: constructor function
     ParameterCount actual(a0);
     __ InvokeFunction(a1, actual, CALL_FUNCTION, NullCallWrapper());
 
     // Restore context from the frame.
     // v0: result
-    // sp[0]: number of arguments (smi-tagged)
+    // sp[0]: new.target
+    // sp[1]: number of arguments (smi-tagged)
     __ lw(cp, MemOperand(fp, StandardFrameConstants::kContextOffset));
-    __ lw(a1, MemOperand(sp, 0));
+    __ lw(a1, MemOperand(sp, kPointerSize));
 
     // Leave construct frame.
   }
 
   __ sll(at, a1, kPointerSizeLog2 - 1);
   __ Addu(sp, sp, Operand(at));
   __ Addu(sp, sp, Operand(kPointerSize));
   __ Jump(ra);
 }
 
@@ skipping 999 matching lines @@
   }
 }
 
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_MIPS