PPC: Do not add extra argument for new.target

src/ppc/builtins-ppc.cc

 // Copyright 2014 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_PPC
 
 #include "src/codegen.h"
 #include "src/debug.h"
@@ skipping 770 matching lines @@
     __ beq(&no_args, cr0);
     __ ShiftLeftImm(ip, r3, Operand(kPointerSizeLog2));
     __ mtctr(r3);
     __ bind(&loop);
     __ subi(ip, ip, Operand(kPointerSize));
     __ LoadPX(r0, MemOperand(r5, ip));
     __ push(r0);
     __ bdnz(&loop);
     __ bind(&no_args);
 
-    __ addi(r3, r3, Operand(1));
-
     // Handle step in.
     Label skip_step_in;
     ExternalReference debug_step_in_fp =
         ExternalReference::debug_step_in_fp_address(masm->isolate());
     __ mov(r5, Operand(debug_step_in_fp));
     __ LoadP(r5, MemOperand(r5));
     __ and_(r0, r5, r5, SetRC);
     __ beq(&skip_step_in, cr0);
 
     __ Push(r3, r4, r4);
     __ CallRuntime(Runtime::kHandleStepInForDerivedConstructors, 1);
     __ Pop(r3, r4);
 
     __ bind(&skip_step_in);
 
     // Call the function.
     // r3: number of arguments
     // r4: constructor function
     ParameterCount actual(r3);
     __ InvokeFunction(r4, actual, CALL_FUNCTION, NullCallWrapper());
 
     // Restore context from the frame.
     // r3: result
     // sp[0]: number of arguments (smi-tagged)
     __ LoadP(cp, MemOperand(fp, StandardFrameConstants::kContextOffset));
-    __ LoadP(r4, MemOperand(sp, 0));
+    // Get arguments count, skipping over new.target.
+    __ LoadP(r4, MemOperand(sp, kPointerSize));
 
     // Leave construct frame.
   }
 
   __ SmiToPtrArrayOffset(r4, r4);
   __ add(sp, sp, r4);
   __ addi(sp, sp, Operand(kPointerSize));
   __ blr();
 }
 
@@ skipping 1051 matching lines @@
     __ bkpt(0);
   }
 }
 
 
 #undef __
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_PPC