PPC: Fix '[stubs] Optimize LoadGlobalViaContextStub and StoreGlobalViaContextStub.'

src/ppc/code-stubs-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/base/bits.h"
 #include "src/bootstrapper.h"
@@ skipping 5309 matching lines @@
   Register name = r6;
   Label slow_case;
 
   // Go up the context chain to the script context.
   for (int i = 0; i < depth(); ++i) {
     __ LoadP(result, ContextOperand(context, Context::PREVIOUS_INDEX));
     context = result;
   }
 
   // Load the PropertyCell value at the specified slot.
-  __ ShiftLeftImm(result, slot, Operand(kPointerSizeLog2));
-  __ add(result, context, result);
+  __ ShiftLeftImm(r0, slot, Operand(kPointerSizeLog2));
+  __ add(result, context, r0);
   __ LoadP(result, ContextOperand(result));
   __ LoadP(result, FieldMemOperand(result, PropertyCell::kValueOffset));
 
   // If the result is not the_hole, return. Otherwise, handle in the runtime.
   __ CompareRoot(result, Heap::kTheHoleValueRootIndex);
   __ Ret(ne);
 
   // Fallback to runtime.
   __ bind(&slow_case);
   __ SmiTag(slot);
@@ skipping 24 matching lines @@
     __ AssertName(name);
   }
 
   // Go up the context chain to the script context.
   for (int i = 0; i < depth(); i++) {
     __ LoadP(context_temp, ContextOperand(context, Context::PREVIOUS_INDEX));
     context = context_temp;
   }
 
   // Load the PropertyCell at the specified slot.
-  __ ShiftLeftImm(cell, slot, Operand(kPointerSizeLog2));
-  __ add(cell, context, cell);
+  __ ShiftLeftImm(r0, slot, Operand(kPointerSizeLog2));
+  __ add(cell, context, r0);
   __ LoadP(cell, ContextOperand(cell));
 
   // Load PropertyDetails for the cell (actually only the cell_type and kind).
   __ LoadP(cell_details, FieldMemOperand(cell, PropertyCell::kDetailsOffset));
   __ SmiUntag(cell_details);
   __ andi(cell_details, cell_details,
           Operand(PropertyDetails::PropertyCellTypeField::kMask |
                   PropertyDetails::KindField::kMask));
 
   // Check if PropertyCell holds mutable data.
@@ skipping 438 matching lines @@
                            kStackUnwindSpace, NULL,
                            MemOperand(fp, 6 * kPointerSize), NULL);
 }
 
 
 #undef __
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_PPC