Remove obsolete isolate from CompareOperation predicate.

src/ast/ast.cc

 // Copyright 2012 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/ast/ast.h"
 
 #include <cmath>  // For isfinite.
 
 #include "src/ast/prettyprinter.h"
 #include "src/ast/scopes.h"
@@ skipping 44 matching lines @@
 
 bool Expression::IsStringLiteral() const {
   return IsLiteral() && AsLiteral()->value()->IsString();
 }
 
 
 bool Expression::IsNullLiteral() const {
   return IsLiteral() && AsLiteral()->value()->IsNull();
 }
 
-
-bool Expression::IsUndefinedLiteral(Isolate* isolate) const {
+bool Expression::IsUndefinedLiteral() const {
   if (IsLiteral() && AsLiteral()->value()->IsUndefined()) {
     return true;
   }
 
   const VariableProxy* var_proxy = AsVariableProxy();
   if (var_proxy == NULL) return false;
   Variable* var = var_proxy->var();
   // The global identifier "undefined" is immutable. Everything
   // else could be reassigned.
   return var != NULL && var->IsUnallocatedOrGlobalSlot() &&
@@ skipping 585 matching lines @@
       maybe_unary->op() == Token::VOID &&
       maybe_unary->expression()->IsLiteral();
 }
 
 
 // Check for the pattern: void <literal> equals <expression> or
 // undefined equals <expression>
 static bool MatchLiteralCompareUndefined(Expression* left,
                                          Token::Value op,
                                          Expression* right,
-                                         Expression** expr,
-                                         Isolate* isolate) {
+                                         Expression** expr) {
   if (IsVoidOfLiteral(left) && Token::IsEqualityOp(op)) {
     *expr = right;
     return true;
   }
-  if (left->IsUndefinedLiteral(isolate) && Token::IsEqualityOp(op)) {
+  if (left->IsUndefinedLiteral() && Token::IsEqualityOp(op)) {
     *expr = right;
     return true;
   }
   return false;
 }
 
-
-bool CompareOperation::IsLiteralCompareUndefined(
-    Expression** expr, Isolate* isolate) {
-  return MatchLiteralCompareUndefined(left_, op_, right_, expr, isolate) ||
-      MatchLiteralCompareUndefined(right_, op_, left_, expr, isolate);
+bool CompareOperation::IsLiteralCompareUndefined(Expression** expr) {
+  return MatchLiteralCompareUndefined(left_, op_, right_, expr) ||
+         MatchLiteralCompareUndefined(right_, op_, left_, expr);
 }
 
 
 // Check for the pattern: null equals <expression>
 static bool MatchLiteralCompareNull(Expression* left,
                                     Token::Value op,
                                     Expression* right,
                                     Expression** expr) {
   if (left->IsNullLiteral() && Token::IsEqualityOp(op)) {
     *expr = right;
@@ skipping 135 matching lines @@
 bool Literal::Match(void* literal1, void* literal2) {
   const AstValue* x = static_cast<Literal*>(literal1)->raw_value();
   const AstValue* y = static_cast<Literal*>(literal2)->raw_value();
   return (x->IsString() && y->IsString() && x->AsString() == y->AsString()) ||
          (x->IsNumber() && y->IsNumber() && x->AsNumber() == y->AsNumber());
 }
 
 
 }  // namespace internal
 }  // namespace v8