Optimize isFinite and isNaN.

src/ast.cc

Index: src/ast.cc
diff --git a/src/ast.cc b/src/ast.cc
index 4d881d1c864e1efb35e7dd9b11548f0d2ff157a7..7319abe6ddefc7625f68fc47a2f30fe96638ca0d 100644
--- a/src/ast.cc
+++ b/src/ast.cc
@@ -36,6 +36,15 @@
 namespace v8 {
 namespace internal {
 
+AstSentinels::AstSentinels()
+    : this_proxy_(Isolate::Current(), true),
+      identifier_proxy_(Isolate::Current(), false),
+      valid_left_hand_side_sentinel_(Isolate::Current()),
+      this_property_(Isolate::Current(), &this_proxy_, NULL, 0),
+      call_sentinel_(Isolate::Current(), NULL, NULL, 0) {
+}
+
+
 // ----------------------------------------------------------------------------
 // All the Accept member functions for each syntax tree node type.
 
@@ -92,6 +101,15 @@ VariableProxy::VariableProxy(Isolate* isolate,
 }
 
 
+VariableProxy::VariableProxy(Isolate* isolate, bool is_this)
+    : Expression(isolate),
+      var_(NULL),
+      is_this_(is_this),
+      inside_with_(false),
+      is_trivial_(false) {
+}
+
+
 void VariableProxy::BindTo(Variable* var) {
   ASSERT(var_ == NULL);  // must be bound only once
   ASSERT(var != NULL);  // must bind
@@ -469,6 +487,12 @@ bool SharedFunctionInfoLiteral::IsInlineable() const {
 }
 
 
+bool ValidLeftHandSideSentinel::IsInlineable() const {
+  UNREACHABLE();
+  return false;
+}
+
+
 bool ForStatement::IsInlineable() const {
   return (init() == NULL || init()->IsInlineable())
       && (cond() == NULL || cond()->IsInlineable())