Mercurial > jdk8-mips64-public > hotspot / file diff

     1.1 --- a/src/share/vm/opto/chaitin.hpp	Mon Jan 12 15:24:29 2015 +0100
     1.2 +++ b/src/share/vm/opto/chaitin.hpp	Tue Jan 20 13:56:02 2015 -0800
     1.3 @@ -578,6 +578,32 @@
     1.4    // Extend the node to LRG mapping
     1.5    void add_reference( const Node *node, const Node *old_node);
     1.6  
     1.7 +  // Record the first use of a def in the block for a register.
     1.8 +  class RegDefUse {
     1.9 +    Node* _def;
    1.10 +    Node* _first_use;
    1.11 +  public:
    1.12 +    RegDefUse() : _def(NULL), _first_use(NULL) { }
    1.13 +    Node* def() const       { return _def;       }
    1.14 +    Node* first_use() const { return _first_use; }
    1.15 +
    1.16 +    void update(Node* def, Node* use) {
    1.17 +      if (_def != def) {
    1.18 +        _def = def;
    1.19 +        _first_use = use;
    1.20 +      }
    1.21 +    }
    1.22 +    void clear() {
    1.23 +      _def = NULL;
    1.24 +      _first_use = NULL;
    1.25 +    }
    1.26 +  };
    1.27 +  typedef GrowableArray<RegDefUse> RegToDefUseMap;
    1.28 +  int possibly_merge_multidef(Node *n, uint k, Block *block, RegToDefUseMap& reg2defuse);
    1.29 +
    1.30 +  // Merge nodes that are a part of a multidef lrg and produce the same value within a block.
    1.31 +  void merge_multidefs();
    1.32 +
    1.33  private:
    1.34  
    1.35    static int _final_loads, _final_stores, _final_copies, _final_memoves;