Assign unique IDs to FunctionLiterals

src/ast/ast-function-literal-id-reindexer.cc

Index: src/ast/ast-function-literal-id-reindexer.cc
diff --git a/src/ast/ast-function-literal-id-reindexer.cc b/src/ast/ast-function-literal-id-reindexer.cc
new file mode 100644
index 0000000000000000000000000000000000000000..2ffc143606762b69577bd82306eeb8069d47ff8e
--- /dev/null
+++ b/src/ast/ast-function-literal-id-reindexer.cc
@@ -0,0 +1,28 @@
+// Copyright 2016 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-function-literal-id-reindexer.h"
+
+#include "src/ast/ast.h"
+
+namespace v8 {
+namespace internal {
+
+AstFunctionLiteralIdReindexer::AstFunctionLiteralIdReindexer(size_t stack_limit,
+                                                             int delta)
+    : AstTraversalVisitor(stack_limit), delta_(delta) {}
+
+AstFunctionLiteralIdReindexer::~AstFunctionLiteralIdReindexer() {}
+
+void AstFunctionLiteralIdReindexer::Reindex(Expression* pattern) {
+  Visit(pattern);
+}
+
+void AstFunctionLiteralIdReindexer::VisitFunctionLiteral(FunctionLiteral* lit) {
+  AstTraversalVisitor::VisitFunctionLiteral(lit);
+  lit->set_function_literal_id(lit->function_literal_id() + delta_);
+}
+
+}  // namespace internal
+}  // namespace v8