Remove unused byte from Map::instance_sizes field.

src/ppc/macro-assembler-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 <assert.h>  // For assert
 #include <limits.h>  // For LONG_MIN, LONG_MAX.
 
 #include "src/v8.h"
 
 #if V8_TARGET_ARCH_PPC
@@ skipping 1565 matching lines @@
   }
   StoreP(scratch2, MemOperand(topaddr));
 
   // Tag object if requested.
   if ((flags & TAG_OBJECT) != 0) {
     addi(result, result, Operand(kHeapObjectTag));
   }
 }
 
 
-void MacroAssembler::UndoAllocationInNewSpace(Register object,
-                                              Register scratch) {
-  ExternalReference new_space_allocation_top =
-      ExternalReference::new_space_allocation_top_address(isolate());
-
-  // Make sure the object has no tag before resetting top.
-  ClearRightImm(object, object, Operand(kHeapObjectTagSize));
-#ifdef DEBUG
-  // Check that the object un-allocated is below the current top.
-  mov(scratch, Operand(new_space_allocation_top));
-  LoadP(scratch, MemOperand(scratch));
-  cmp(object, scratch);
-  Check(lt, kUndoAllocationOfNonAllocatedMemory);
-#endif
-  // Write the address of the object to un-allocate as the current top.
-  mov(scratch, Operand(new_space_allocation_top));
-  StoreP(object, MemOperand(scratch));
-}
-
-
 void MacroAssembler::AllocateTwoByteString(Register result, Register length,
                                            Register scratch1, Register scratch2,
                                            Register scratch3,
                                            Label* gc_required) {
   // Calculate the number of bytes needed for the characters in the string while
   // observing object alignment.
   DCHECK((SeqTwoByteString::kHeaderSize & kObjectAlignmentMask) == 0);
   slwi(scratch1, length, Operand(1));  // Length in bytes, not chars.
   addi(scratch1, scratch1,
        Operand(kObjectAlignmentMask + SeqTwoByteString::kHeaderSize));
@@ skipping 3046 matching lines @@
   }
   if (mag.shift > 0) srawi(result, result, mag.shift);
   ExtractBit(r0, dividend, 31);
   add(result, result, r0);
 }
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_PPC