Made Isolate a mandatory parameter for everything Handle-related.

src/hydrogen-instructions.cc

Index: src/hydrogen-instructions.cc
diff --git a/src/hydrogen-instructions.cc b/src/hydrogen-instructions.cc
index 2d4b82bf16ba1efe84bbc0915111921069ad9384..29018f62817f4b64d4c204138b6c515d28c24b23 100644
--- a/src/hydrogen-instructions.cc
+++ b/src/hydrogen-instructions.cc
@@ -75,6 +75,12 @@ int HValue::LoopWeight() const {
 }
 
 
+Isolate* HValue::isolate() const {
+  ASSERT(block() != NULL);
+  return block()->graph()->isolate();
+}
+
+
 void HValue::AssumeRepresentation(Representation r) {
   if (CheckFlag(kFlexibleRepresentation)) {
     ChangeRepresentation(r);
@@ -341,10 +347,10 @@ const char* HType::ToString() {
 }
 
 
-HType HType::TypeFromValue(Handle<Object> value) {
+HType HType::TypeFromValue(Isolate* isolate, Handle<Object> value) {
   // Handle dereferencing is safe here: an object's type as checked below
   // never changes.
-  AllowHandleDereference allow_handle_deref;
+  AllowHandleDereference allow_handle_deref(isolate);
 
   HType result = HType::Tagged();
   if (value->IsSmi()) {
@@ -1277,7 +1283,7 @@ HValue* HCheckInstanceType::Canonicalize() {
 
   if (check_ == IS_SYMBOL && value()->IsConstant()) {
     // Dereferencing is safe here: a symbol cannot become a non-symbol.
-    AllowHandleDereference allow_handle_deref;
+    AllowHandleDereference allow_handle_deref(isolate());
     if (HConstant::cast(value())->handle()->IsSymbol()) return NULL;
   }
   return this;
@@ -1764,7 +1770,7 @@ HConstant::HConstant(Handle<Object> handle, Representation r)
       has_int32_value_(false),
       has_double_value_(false) {
   // Dereferencing here is safe: the value of a number object does not change.
-  AllowHandleDereference allow_handle_deref;
+  AllowHandleDereference allow_handle_deref(Isolate::Current());
   SetFlag(kUseGVN);
   if (handle_->IsNumber()) {
     double n = handle_->Number();
@@ -1845,7 +1851,7 @@ bool HConstant::ToBoolean() {
   }
   // Dereferencing is safe: singletons do not change and strings are
   // immutable.
-  AllowHandleDereference allow_handle_deref;
+  AllowHandleDereference allow_handle_deref(isolate());
   if (handle_->IsTrue()) return true;
   if (handle_->IsFalse()) return false;
   if (handle_->IsUndefined()) return false;
@@ -2533,7 +2539,7 @@ HType HConstant::CalculateInferredType() {
     return Smi::IsValid(int32_value_) ? HType::Smi() : HType::HeapNumber();
   }
   if (has_double_value_) return HType::HeapNumber();
-  return HType::TypeFromValue(handle_);
+  return HType::TypeFromValue(isolate(), handle_);
 }