[Courgette] Using LabelManager to reduce Courgette-apply peak RAM by 25%.

courgette/label_manager.cc

 // Copyright 2015 The Chromium 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 "courgette/label_manager.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 78 matching lines @@
     }
   }
   VLOG(1) << "  infill " << count;
 }
 
 LabelManager::LabelManager() {}
 
 LabelManager::~LabelManager() {}
 
 // static
-int LabelManager::GetIndexBound(const RVAToLabel& labels_map) {
-  int max_index = -1;
-  for (const auto& rva_and_label : labels_map) {
-    const Label& label = *rva_and_label.second;
-    if (label.index_ != Label::kNoIndex)
-      max_index = std::max(max_index, label.index_);
-  }
-  return max_index + 1;
-}
-
-// static
 int LabelManager::GetLabelIndexBound(const LabelVector& labels) {
   int max_index = -1;
   for (const Label& label : labels) {
     if (label.index_ != Label::kNoIndex)
       max_index = std::max(max_index, label.index_);
   }
   return max_index + 1;
 }
 
 // Uses binary search to find |rva|.
@@ skipping 67 matching lines @@
   DCHECK(labels_.empty());
   labels_.reserve(num_distinct_rva);
   for (CRV it(rvas.begin(), rvas.end()); it.has_more(); it.advance()) {
     labels_.push_back(Label(*it.cur()));
     base::CheckedNumeric<uint32_t> count = it.repeat();
     labels_.back().count_ = count.ValueOrDie();
   }
 }
 
 }  // namespace courgette