Remove duplicate code for searching SharedFunctionInfo.

src/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.h"
 
 #include <cmath>  // For isfinite.
 #include "src/builtins.h"
 #include "src/code-stubs.h"
 #include "src/contexts.h"
@@ skipping 139 matching lines @@
   return scope()->strict_mode();
 }
 
 
 bool FunctionLiteral::uses_super() const {
   DCHECK_NOT_NULL(scope());
   return scope()->uses_super() || scope()->inner_uses_super();
 }
 
 
+// Helper to find an existing shared function info in the baseline code for the
+// given function literal. Used to canonicalize SharedFunctionInfo objects.
 void FunctionLiteral::InitializeSharedInfo(
     Handle<Code> unoptimized_code) {
   for (RelocIterator it(*unoptimized_code); !it.done(); it.next()) {
     RelocInfo* rinfo = it.rinfo();
     if (rinfo->rmode() != RelocInfo::EMBEDDED_OBJECT) continue;
     Object* obj = rinfo->target_object();
     if (obj->IsSharedFunctionInfo()) {
       SharedFunctionInfo* shared = SharedFunctionInfo::cast(obj);
       if (shared->start_position() == start_position()) {
         shared_info_ = Handle<SharedFunctionInfo>(shared);
@@ skipping 847 matching lines @@
 // static
 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 v8::internal