Remove the dependency of Zone on Isolate

src/compiler/simplified-lowering.cc

Index: src/compiler/simplified-lowering.cc
diff --git a/src/compiler/simplified-lowering.cc b/src/compiler/simplified-lowering.cc
index d7157f6bf04005be6feaf2396bdf25454fade664..e334d1faefca41cffcc6172d445884b0c9f6b39e 100644
--- a/src/compiler/simplified-lowering.cc
+++ b/src/compiler/simplified-lowering.cc
@@ -76,7 +76,7 @@ class RepresentationSelector {
         queue_(zone) {
     memset(info_, 0, sizeof(NodeInfo) * count_);
 
-    Factory* f = zone->isolate()->factory();
+    Factory* f = jsgraph->isolate()->factory();
     safe_int_additive_range_ =
         Type::Range(f->NewNumber(-std::pow(2.0, 52.0)),
                     f->NewNumber(std::pow(2.0, 52.0)), zone);
@@ -530,7 +530,8 @@ class RepresentationSelector {
               jsgraph_->isolate(), ToBooleanStub::RESULT_AS_ODDBALL);
           CallDescriptor::Flags flags = CallDescriptor::kPatchableCallSite;
           CallDescriptor* desc = Linkage::GetStubCallDescriptor(
-              callable.descriptor(), 0, flags, properties, jsgraph_->zone());
+              jsgraph_->isolate(), jsgraph_->zone(), callable.descriptor(), 0,
+              flags, properties);
           node->set_op(jsgraph_->common()->Call(desc));
           node->InsertInput(jsgraph_->zone(), 0,
                             jsgraph_->HeapConstant(callable.code()));
@@ -740,7 +741,8 @@ class RepresentationSelector {
           Callable callable = CodeFactory::ToNumber(jsgraph_->isolate());
           CallDescriptor::Flags flags = CallDescriptor::kNoFlags;
           CallDescriptor* desc = Linkage::GetStubCallDescriptor(
-              callable.descriptor(), 0, flags, properties, jsgraph_->zone());
+              jsgraph_->isolate(), jsgraph_->zone(), callable.descriptor(), 0,
+              flags, properties);
           node->set_op(jsgraph_->common()->Call(desc));
           node->InsertInput(jsgraph_->zone(), 0,
                             jsgraph_->HeapConstant(callable.code()));
@@ -1089,8 +1091,7 @@ Node* SimplifiedLowering::IsTagged(Node* node) {
 
 void SimplifiedLowering::LowerAllNodes() {
   SimplifiedOperatorBuilder simplified(graph()->zone());
-  RepresentationChanger changer(jsgraph(), &simplified,
-                                graph()->zone()->isolate());
+  RepresentationChanger changer(jsgraph(), &simplified, jsgraph()->isolate());
   RepresentationSelector selector(jsgraph(), zone_, &changer);
   selector.Run(this);
 }
@@ -1255,10 +1256,11 @@ void SimplifiedLowering::DoStoreElement(Node* node) {
 void SimplifiedLowering::DoStringAdd(Node* node) {
   Operator::Properties properties = node->op()->properties();
   Callable callable = CodeFactory::StringAdd(
-      zone()->isolate(), STRING_ADD_CHECK_NONE, NOT_TENURED);
+      jsgraph()->isolate(), STRING_ADD_CHECK_NONE, NOT_TENURED);
   CallDescriptor::Flags flags = CallDescriptor::kNoFlags;
   CallDescriptor* desc = Linkage::GetStubCallDescriptor(
-      callable.descriptor(), 0, flags, properties, zone());
+      jsgraph()->isolate(), zone(), callable.descriptor(), 0, flags,
+      properties);
   node->set_op(common()->Call(desc));
   node->InsertInput(graph()->zone(), 0,
                     jsgraph()->HeapConstant(callable.code()));
@@ -1269,14 +1271,14 @@ void SimplifiedLowering::DoStringAdd(Node* node) {
 
 
 Node* SimplifiedLowering::StringComparison(Node* node, bool requires_ordering) {
-  CEntryStub stub(zone()->isolate(), 1);
+  CEntryStub stub(jsgraph()->isolate(), 1);
   Runtime::FunctionId f =
       requires_ordering ? Runtime::kStringCompare : Runtime::kStringEquals;
-  ExternalReference ref(f, zone()->isolate());
+  ExternalReference ref(f, jsgraph()->isolate());
   Operator::Properties props = node->op()->properties();
   // TODO(mstarzinger): We should call StringCompareStub here instead, once an
   // interface descriptor is available for it.
-  CallDescriptor* desc = Linkage::GetRuntimeCallDescriptor(f, 2, props, zone());
+  CallDescriptor* desc = Linkage::GetRuntimeCallDescriptor(zone(), f, 2, props);
   return graph()->NewNode(common()->Call(desc),
                           jsgraph()->HeapConstant(stub.GetCode()),
                           NodeProperties::GetValueInput(node, 0),