1    :  // Copyright 2012 Google Inc. All Rights Reserved.
   2    :  //
   3    :  // Licensed under the Apache License, Version 2.0 (the "License");
   4    :  // you may not use this file except in compliance with the License.
   5    :  // You may obtain a copy of the License at
   6    :  //
   7    :  //     http://www.apache.org/licenses/LICENSE-2.0
   8    :  //
   9    :  // Unless required by applicable law or agreed to in writing, software
  10    :  // distributed under the License is distributed on an "AS IS" BASIS,
  11    :  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12    :  // See the License for the specific language governing permissions and
  13    :  // limitations under the License.
  14    :  //
  15    :  // Declaration of the BlockBuilder class.
  16    :  
  17    :  #ifndef SYZYGY_BLOCK_GRAPH_BLOCK_BUILDER_H_
  18    :  #define SYZYGY_BLOCK_GRAPH_BLOCK_BUILDER_H_
  19    :  
  20    :  #include "syzygy/block_graph/basic_block_subgraph.h"
  21    :  #include "syzygy/block_graph/block_graph.h"
  22    :  
  23    :  namespace block_graph {
  24    :  
  25    :  // This class incorporates a BasicBlockSubGraph into a BlockGraph.
  26    :  class BlockBuilder {
  27    :   public:
  28    :    explicit BlockBuilder(BlockGraph* block_graph);
  29    :  
  30    :    // Merge the @p subgraph into the block graph. This will create all blocks
  31    :    // and block relationships described by the subgraph and remove the
  32    :    // original block (if any) from which the subgraph was derived.
  33    :    bool Merge(BasicBlockSubGraph* subgraph);
  34    :  
  35    :    // Returns the set of new blocks created upon merging in one or more
  36    :    // subgraphs.
  37  E :    const BlockVector& new_blocks() const { return new_blocks_; }
  38    :  
  39    :   private:
  40    :    // The block-graph that subgraphs will be merged into.
  41    :    BlockGraph* const block_graph_;
  42    :  
  43    :    // The set of blocks created so far.
  44    :    BlockVector new_blocks_;
  45    :  
  46    :    DISALLOW_COPY_AND_ASSIGN(BlockBuilder);
  47    :  };
  48    :  
  49    :  }  // namespace block_graph
  50    :  
  51    :  #endif  // SYZYGY_BLOCK_GRAPH_BLOCK_BUILDER_H_