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

src/compiler/linkage.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/code-stubs.h"
 #include "src/compiler.h"
 #include "src/compiler/linkage.h"
 #include "src/compiler/node.h"
 #include "src/compiler/pipeline.h"
 #include "src/scopes.h"
@@ skipping 96 matching lines @@
 // static
 bool Linkage::NeedsFrameState(Runtime::FunctionId function) {
   // Most runtime functions need a FrameState. A few chosen ones that we know
   // not to call into arbitrary JavaScript, not to throw, and not to deoptimize
   // are blacklisted here and can be called without a FrameState.
   switch (function) {
     case Runtime::kAllocateInTargetSpace:
     case Runtime::kDefineClassMethod:              // TODO(jarin): Is it safe?
     case Runtime::kDefineGetterPropertyUnchecked:  // TODO(jarin): Is it safe?
     case Runtime::kDefineSetterPropertyUnchecked:  // TODO(jarin): Is it safe?
-    case Runtime::kForInCacheArrayLength:
-    case Runtime::kForInInit:
-    case Runtime::kForInNext:
+    case Runtime::kForInDone:
+    case Runtime::kForInStep:
     case Runtime::kNewArguments:
     case Runtime::kNewClosure:
     case Runtime::kNewFunctionContext:
     case Runtime::kNewRestParamSlow:
     case Runtime::kPushBlockContext:
     case Runtime::kPushCatchContext:
     case Runtime::kReThrow:
     case Runtime::kSetProperty:  // TODO(jarin): Is it safe?
     case Runtime::kStringCompareRT:
     case Runtime::kStringEquals:
@@ skipping 69 matching lines @@
 
 CallDescriptor* Linkage::GetSimplifiedCDescriptor(Zone* zone,
                                                   const MachineSignature* sig) {
   UNIMPLEMENTED();
   return NULL;
 }
 #endif  // !V8_TURBOFAN_BACKEND
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8