PPC: Fix "Unify the stack layout for construct frames"

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 608 matching lines @@
       // need to increment the memento create count.
       __ LoadP(
           r6, FieldMemOperand(r5, AllocationSite::kPretenureCreateCountOffset));
       __ AddSmiLiteral(r6, r6, Smi::FromInt(1), r0);
       __ StoreP(
           r6, FieldMemOperand(r5, AllocationSite::kPretenureCreateCountOffset),
           r0);
       __ bind(&count_incremented);
     }
 
-    __ Pop(r4);
+    __ pop(r4);  // Constructor function.
 
     __ Push(r7, r7);
 
-    // Reload the number of arguments and the constructor from the stack.
+    // Reload the number of arguments from the stack.
     // sp[0]: receiver
     // sp[1]: receiver
     // sp[2]: number of arguments (smi-tagged)
     __ LoadP(r6, MemOperand(sp, 2 * kPointerSize));
 
     // Set up pointer to last argument.
     __ addi(r5, fp, Operand(StandardFrameConstants::kCallerSPOffset));
 
     // Set up number of arguments for function call below
     __ SmiUntag(r3, r6);
@@ skipping 1231 matching lines @@
     __ bkpt(0);
   }
 }
 
 
 #undef __
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_PPC