[es6] Implement spec compliant ToPrimitive in the runtime.

src/full-codegen/ppc/full-codegen-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.
 
 #if V8_TARGET_ARCH_PPC
 
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
 #include "src/codegen.h"
 #include "src/compiler.h"
@@ skipping 3443 matching lines @@
   __ addi(r7, r7, Operand(DescriptorArray::kFirstOffset - kHeapObjectTag));
   // Calculate the end of the descriptor array.
   __ mr(r5, r7);
   __ ShiftLeftImm(ip, r6, Operand(kPointerSizeLog2));
   __ add(r5, r5, ip);
 
   // Loop through all the keys in the descriptor array. If one of these is the
   // string "valueOf" the result is false.
   // The use of ip to store the valueOf string assumes that it is not otherwise
   // used in the loop below.
-  __ mov(ip, Operand(isolate()->factory()->value_of_string()));
+  __ LoadRoot(ip, Heap::kvalueOf_stringRootIndex);
   __ b(&entry);
   __ bind(&loop);
   __ LoadP(r6, MemOperand(r7, 0));
   __ cmp(r6, ip);
   __ beq(if_false);
   __ addi(r7, r7, Operand(DescriptorArray::kDescriptorSize * kPointerSize));
   __ bind(&entry);
   __ cmp(r7, r5);
   __ bne(&loop);
 
@@ skipping 1848 matching lines @@
     return ON_STACK_REPLACEMENT;
   }
 
   DCHECK(interrupt_address ==
          isolate->builtins()->OsrAfterStackCheck()->entry());
   return OSR_AFTER_STACK_CHECK;
 }
 }  // namespace internal
 }  // namespace v8
 #endif  // V8_TARGET_ARCH_PPC