Do not add extra argument for new.target

src/mips/builtins-mips.cc

Index: src/mips/builtins-mips.cc
diff --git a/src/mips/builtins-mips.cc b/src/mips/builtins-mips.cc
index 2f8d3b952c73a6a516fe93bda5b756566f286fa1..b4ebef208fdeae2196d3a5ed27035304c72c2069 100644
--- a/src/mips/builtins-mips.cc
+++ b/src/mips/builtins-mips.cc
@@ -799,8 +799,6 @@ void Builtins::Generate_JSConstructStubForDerived(MacroAssembler* masm) {
     __ 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 =
@@ -825,7 +823,7 @@ void Builtins::Generate_JSConstructStubForDerived(MacroAssembler* masm) {
     // v0: result
     // sp[0]: number of arguments (smi-tagged)
     __ lw(cp, MemOperand(fp, StandardFrameConstants::kContextOffset));
-    __ lw(a1, MemOperand(sp, 0));
+    __ lw(a1, MemOperand(sp, kPointerSize));
 
     // Leave construct frame.
   }