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comparison src/share/vm/opto/matcher.hpp @ 729:04fa5affa478

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6709742: find_base_for_derived's use of Ideal NULL is unsafe causing crashes during register allocation Summary: Create a mach node corresponding to ideal node ConP #NULL specifically for derived pointers. Reviewed-by: never
author kvn
date Wed, 22 Apr 2009 17:03:18 -0700
parents 4d9884b01ba6
children 93c14e5562c4
comparison
equal deleted inserted replaced
728:85656c8fa13f 729:04fa5affa478
107 void verify_new_nodes_only(Node* root); 107 void verify_new_nodes_only(Node* root);
108 108
109 Node* _mem_node; // Ideal memory node consumed by mach node 109 Node* _mem_node; // Ideal memory node consumed by mach node
110 #endif 110 #endif
111 111
112 // Mach node for ConP #NULL
113 MachNode* _mach_null;
114
112 public: 115 public:
113 int LabelRootDepth; 116 int LabelRootDepth;
114 static const int base2reg[]; // Map Types to machine register types 117 static const int base2reg[]; // Map Types to machine register types
115 // Convert ideal machine register to a register mask for spill-loads 118 // Convert ideal machine register to a register mask for spill-loads
116 static const RegMask *idealreg2regmask[]; 119 static const RegMask *idealreg2regmask[];
119 void init_spill_mask( Node *ret ); 122 void init_spill_mask( Node *ret );
120 // Convert machine register number to register mask 123 // Convert machine register number to register mask
121 static uint mreg2regmask_max; 124 static uint mreg2regmask_max;
122 static RegMask mreg2regmask[]; 125 static RegMask mreg2regmask[];
123 static RegMask STACK_ONLY_mask; 126 static RegMask STACK_ONLY_mask;
127
128 MachNode* mach_null() const { return _mach_null; }
124 129
125 bool is_shared( Node *n ) { return _shared.test(n->_idx) != 0; } 130 bool is_shared( Node *n ) { return _shared.test(n->_idx) != 0; }
126 void set_shared( Node *n ) { _shared.set(n->_idx); } 131 void set_shared( Node *n ) { _shared.set(n->_idx); }
127 bool is_visited( Node *n ) { return _visited.test(n->_idx) != 0; } 132 bool is_visited( Node *n ) { return _visited.test(n->_idx) != 0; }
128 void set_visited( Node *n ) { _visited.set(n->_idx); } 133 void set_visited( Node *n ) { _visited.set(n->_idx); }