Correctify instanceof and make it optimizable.

src/x64/lithium-x64.cc

Index: src/x64/lithium-x64.cc
diff --git a/src/x64/lithium-x64.cc b/src/x64/lithium-x64.cc
index 965b63c4cfb8f955375ebe3232ce8f63d5fc03cb..1ffa31d2af5664e8101300b8dbd95987fa7a292f 100644
--- a/src/x64/lithium-x64.cc
+++ b/src/x64/lithium-x64.cc
@@ -947,22 +947,14 @@ void LChunkBuilder::AddInstruction(LInstruction* instr,
 
   if (instr->IsCall()) {
     HValue* hydrogen_value_for_lazy_bailout = hydrogen_val;
-    LInstruction* instruction_needing_environment = NULL;
     if (hydrogen_val->HasObservableSideEffects()) {
       HSimulate* sim = HSimulate::cast(hydrogen_val->next());
-      instruction_needing_environment = instr;
       sim->ReplayEnvironment(current_block_->last_environment());
       hydrogen_value_for_lazy_bailout = sim;
     }
     LInstruction* bailout = AssignEnvironment(new(zone()) LLazyBailout());
     bailout->set_hydrogen_value(hydrogen_value_for_lazy_bailout);
     chunk_->AddInstruction(bailout, current_block_);
-    if (instruction_needing_environment != NULL) {
-      // Store the lazy deopt environment with the instruction if needed.
-      // Right now it is only used for LInstanceOfKnownGlobal.
-      instruction_needing_environment->
-          SetDeferredLazyDeoptimizationEnvironment(bailout->environment());
-    }
   }
 }
 
@@ -1016,21 +1008,21 @@ LInstruction* LChunkBuilder::DoArgumentsElements(HArgumentsElements* elems) {
 
 
 LInstruction* LChunkBuilder::DoInstanceOf(HInstanceOf* instr) {
-  LOperand* left = UseFixed(instr->left(), rax);
-  LOperand* right = UseFixed(instr->right(), rdx);
+  LOperand* left =
+      UseFixed(instr->left(), InstanceOfDescriptor::LeftRegister());
+  LOperand* right =
+      UseFixed(instr->right(), InstanceOfDescriptor::RightRegister());
   LOperand* context = UseFixed(instr->context(), rsi);
-  LInstanceOf* result = new(zone()) LInstanceOf(context, left, right);
+  LInstanceOf* result = new (zone()) LInstanceOf(context, left, right);
   return MarkAsCall(DefineFixed(result, rax), instr);
 }
 
 
-LInstruction* LChunkBuilder::DoInstanceOfKnownGlobal(
-    HInstanceOfKnownGlobal* instr) {
-  LInstanceOfKnownGlobal* result =
-      new(zone()) LInstanceOfKnownGlobal(UseFixed(instr->context(), rsi),
-                                         UseFixed(instr->left(), rax),
-                                         FixedTemp(rdi));
-  return MarkAsCall(DefineFixed(result, rax), instr);
+LInstruction* LChunkBuilder::DoHasInPrototypeChainAndBranch(
+    HHasInPrototypeChainAndBranch* instr) {
+  LOperand* object = UseRegister(instr->object());
+  LOperand* prototype = UseRegister(instr->prototype());
+  return new (zone()) LHasInPrototypeChainAndBranch(object, prototype);
 }