1069 // Ordering between a volatile store and a following volatile load.
1070 // Requires multi-CPU visibility?
1071 class MemBarVolatileNode: public MemBarNode {
1072 public:
1073 MemBarVolatileNode(Compile* C, int alias_idx, Node* precedent)
1074 : MemBarNode(C, alias_idx, precedent) {}
1075 virtual int Opcode() const;
1076 };
1077
1078 // Ordering within the same CPU. Used to order unsafe memory references
1079 // inside the compiler when we lack alias info. Not needed "outside" the
1080 // compiler because the CPU does all the ordering for us.
1081 class MemBarCPUOrderNode: public MemBarNode {
1082 public:
1083 MemBarCPUOrderNode(Compile* C, int alias_idx, Node* precedent)
1084 : MemBarNode(C, alias_idx, precedent) {}
1085 virtual int Opcode() const;
1086 virtual uint ideal_reg() const { return 0; } // not matched in the AD file
1087 };
1088
1089 // Isolation of object setup after an AllocateNode and before next safepoint.
1090 // (See comment in memnode.cpp near InitializeNode::InitializeNode for semantics.)
1091 class InitializeNode: public MemBarNode {
1092 friend class AllocateNode;
1093
1094 enum {
1095 Incomplete = 0,
1096 Complete = 1,
1097 WithArraycopy = 2
1098 };
1099 int _is_complete;
1100
1101 bool _does_not_escape;
1102
1103 public:
1104 enum {
1105 Control = TypeFunc::Control,
1106 Memory = TypeFunc::Memory, // MergeMem for states affected by this op
1107 RawAddress = TypeFunc::Parms+0, // the newly-allocated raw address
1108 RawStores = TypeFunc::Parms+1 // zero or more stores (or TOP)
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1069 // Ordering between a volatile store and a following volatile load.
1070 // Requires multi-CPU visibility?
1071 class MemBarVolatileNode: public MemBarNode {
1072 public:
1073 MemBarVolatileNode(Compile* C, int alias_idx, Node* precedent)
1074 : MemBarNode(C, alias_idx, precedent) {}
1075 virtual int Opcode() const;
1076 };
1077
1078 // Ordering within the same CPU. Used to order unsafe memory references
1079 // inside the compiler when we lack alias info. Not needed "outside" the
1080 // compiler because the CPU does all the ordering for us.
1081 class MemBarCPUOrderNode: public MemBarNode {
1082 public:
1083 MemBarCPUOrderNode(Compile* C, int alias_idx, Node* precedent)
1084 : MemBarNode(C, alias_idx, precedent) {}
1085 virtual int Opcode() const;
1086 virtual uint ideal_reg() const { return 0; } // not matched in the AD file
1087 };
1088
1089 class OnSpinWaitNode: public MemBarNode {
1090 public:
1091 OnSpinWaitNode(Compile* C, int alias_idx, Node* precedent)
1092 : MemBarNode(C, alias_idx, precedent) {}
1093 virtual int Opcode() const;
1094 };
1095
1096 // Isolation of object setup after an AllocateNode and before next safepoint.
1097 // (See comment in memnode.cpp near InitializeNode::InitializeNode for semantics.)
1098 class InitializeNode: public MemBarNode {
1099 friend class AllocateNode;
1100
1101 enum {
1102 Incomplete = 0,
1103 Complete = 1,
1104 WithArraycopy = 2
1105 };
1106 int _is_complete;
1107
1108 bool _does_not_escape;
1109
1110 public:
1111 enum {
1112 Control = TypeFunc::Control,
1113 Memory = TypeFunc::Memory, // MergeMem for states affected by this op
1114 RawAddress = TypeFunc::Parms+0, // the newly-allocated raw address
1115 RawStores = TypeFunc::Parms+1 // zero or more stores (or TOP)
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