PPC: [turbofan] First step towards sanitizing for-in and making it optimizable.

src/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.
 
 #include "src/v8.h"
 
 #if V8_TARGET_ARCH_PPC
 
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
@@ skipping 1214 matching lines @@
 
   // For proxies, no filtering is done.
   // TODO(rossberg): What if only a prototype is a proxy? Not specified yet.
   __ CmpSmiLiteral(r5, Smi::FromInt(0), r0);
   __ beq(&update_each);
 
   // Convert the entry to a string or (smi) 0 if it isn't a property
   // any more. If the property has been removed while iterating, we
   // just skip it.
   __ Push(r4, r6);  // Enumerable and current entry.
-  __ InvokeBuiltin(Builtins::FILTER_KEY, CALL_FUNCTION);
+  __ CallRuntime(Runtime::kForInFilter, 2);
   PrepareForBailoutForId(stmt->FilterId(), TOS_REG);
   __ mr(r6, r3);
-  __ cmpi(r6, Operand::Zero());
+  __ LoadRoot(r0, Heap::kUndefinedValueRootIndex);
+  __ cmp(r3, r0);
   __ beq(loop_statement.continue_label());
 
   // Update the 'each' property or variable from the possibly filtered
   // entry in register r6.
   __ bind(&update_each);
   __ mr(result_register(), r6);
   // Perform the assignment as if via '='.
   {
     EffectContext context(this);
     EmitAssignment(stmt->each(), stmt->EachFeedbackSlot());
@@ skipping 4266 matching lines @@
     return ON_STACK_REPLACEMENT;
   }
 
   DCHECK(interrupt_address ==
          isolate->builtins()->OsrAfterStackCheck()->entry());
   return OSR_AFTER_STACK_CHECK;
 }
 }
 }  // namespace v8::internal
 #endif  // V8_TARGET_ARCH_PPC