jdk8-mips64-public/hotspot: comparison src/share/vm/opto/chaitin.hpp

-:06face256a8c
+:9df0d8f65fea
 Block *current_block, Node_List& value, Node_List &regnd,
 OptoReg::Name nreg, OptoReg::Name nreg2);
 // Extend the node to LRG mapping
 void add_reference( const Node *node, const Node *old_node);
+// Record the first use of a def in the block for a register.
+class RegDefUse {
+Node* _def;
+Node* _first_use;
+public:
+RegDefUse() : _def(NULL), _first_use(NULL) { }
+Node* def() const       { return _def;       }
+Node* first_use() const { return _first_use; }
+void update(Node* def, Node* use) {
+if (_def != def) {
+_def = def;
+_first_use = use;
+}
+}
+void clear() {
+_def = NULL;
+_first_use = NULL;
+}
+};
+typedef GrowableArray<RegDefUse> RegToDefUseMap;
+int possibly_merge_multidef(Node *n, uint k, Block *block, RegToDefUseMap& reg2defuse);
+// Merge nodes that are a part of a multidef lrg and produce the same value within a block.
+void merge_multidefs();
 private:
 static int _final_loads, _final_stores, _final_copies, _final_memoves;
 static double _final_load_cost, _final_store_cost, _final_copy_cost, _final_memove_cost;
 static int _conserv_coalesce, _conserv_coalesce_pair;

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