980 // Factory method. Builds a wide or narrow membar.
981 // Optional 'precedent' becomes an extra edge if not null.
982 static MemBarNode* make(Compile* C, int opcode,
983 int alias_idx = Compile::AliasIdxBot,
984 Node* precedent = NULL);
985 };
986
987 // "Acquire" - no following ref can move before (but earlier refs can
988 // follow, like an early Load stalled in cache). Requires multi-cpu
989 // visibility. Inserted after a volatile load.
990 class MemBarAcquireNode: public MemBarNode {
991 public:
992 MemBarAcquireNode(Compile* C, int alias_idx, Node* precedent)
993 : MemBarNode(C, alias_idx, precedent) {}
994 virtual int Opcode() const;
995 };
996
997 // "Acquire" - no following ref can move before (but earlier refs can
998 // follow, like an early Load stalled in cache). Requires multi-cpu
999 // visibility. Inserted independ of any load, as required
1000 // for intrinsic sun.misc.Unsafe.loadFence().
1001 class LoadFenceNode: public MemBarNode {
1002 public:
1003 LoadFenceNode(Compile* C, int alias_idx, Node* precedent)
1004 : MemBarNode(C, alias_idx, precedent) {}
1005 virtual int Opcode() const;
1006 };
1007
1008 // "Release" - no earlier ref can move after (but later refs can move
1009 // up, like a speculative pipelined cache-hitting Load). Requires
1010 // multi-cpu visibility. Inserted before a volatile store.
1011 class MemBarReleaseNode: public MemBarNode {
1012 public:
1013 MemBarReleaseNode(Compile* C, int alias_idx, Node* precedent)
1014 : MemBarNode(C, alias_idx, precedent) {}
1015 virtual int Opcode() const;
1016 };
1017
1018 // "Release" - no earlier ref can move after (but later refs can move
1019 // up, like a speculative pipelined cache-hitting Load). Requires
1020 // multi-cpu visibility. Inserted independent of any store, as required
1021 // for intrinsic sun.misc.Unsafe.storeFence().
1022 class StoreFenceNode: public MemBarNode {
1023 public:
1024 StoreFenceNode(Compile* C, int alias_idx, Node* precedent)
1025 : MemBarNode(C, alias_idx, precedent) {}
1026 virtual int Opcode() const;
1027 };
1028
1029 // "Acquire" - no following ref can move before (but earlier refs can
1030 // follow, like an early Load stalled in cache). Requires multi-cpu
1031 // visibility. Inserted after a FastLock.
1032 class MemBarAcquireLockNode: public MemBarNode {
1033 public:
1034 MemBarAcquireLockNode(Compile* C, int alias_idx, Node* precedent)
1035 : MemBarNode(C, alias_idx, precedent) {}
1036 virtual int Opcode() const;
1037 };
1038
1039 // "Release" - no earlier ref can move after (but later refs can move
1040 // up, like a speculative pipelined cache-hitting Load). Requires
1041 // multi-cpu visibility. Inserted before a FastUnLock.
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980 // Factory method. Builds a wide or narrow membar.
981 // Optional 'precedent' becomes an extra edge if not null.
982 static MemBarNode* make(Compile* C, int opcode,
983 int alias_idx = Compile::AliasIdxBot,
984 Node* precedent = NULL);
985 };
986
987 // "Acquire" - no following ref can move before (but earlier refs can
988 // follow, like an early Load stalled in cache). Requires multi-cpu
989 // visibility. Inserted after a volatile load.
990 class MemBarAcquireNode: public MemBarNode {
991 public:
992 MemBarAcquireNode(Compile* C, int alias_idx, Node* precedent)
993 : MemBarNode(C, alias_idx, precedent) {}
994 virtual int Opcode() const;
995 };
996
997 // "Acquire" - no following ref can move before (but earlier refs can
998 // follow, like an early Load stalled in cache). Requires multi-cpu
999 // visibility. Inserted independ of any load, as required
1000 // for intrinsic [sun|jdk.internal].misc.Unsafe.loadFence().
1001 class LoadFenceNode: public MemBarNode {
1002 public:
1003 LoadFenceNode(Compile* C, int alias_idx, Node* precedent)
1004 : MemBarNode(C, alias_idx, precedent) {}
1005 virtual int Opcode() const;
1006 };
1007
1008 // "Release" - no earlier ref can move after (but later refs can move
1009 // up, like a speculative pipelined cache-hitting Load). Requires
1010 // multi-cpu visibility. Inserted before a volatile store.
1011 class MemBarReleaseNode: public MemBarNode {
1012 public:
1013 MemBarReleaseNode(Compile* C, int alias_idx, Node* precedent)
1014 : MemBarNode(C, alias_idx, precedent) {}
1015 virtual int Opcode() const;
1016 };
1017
1018 // "Release" - no earlier ref can move after (but later refs can move
1019 // up, like a speculative pipelined cache-hitting Load). Requires
1020 // multi-cpu visibility. Inserted independent of any store, as required
1021 // for intrinsic [sun|jdk.internal].misc.Unsafe.storeFence().
1022 class StoreFenceNode: public MemBarNode {
1023 public:
1024 StoreFenceNode(Compile* C, int alias_idx, Node* precedent)
1025 : MemBarNode(C, alias_idx, precedent) {}
1026 virtual int Opcode() const;
1027 };
1028
1029 // "Acquire" - no following ref can move before (but earlier refs can
1030 // follow, like an early Load stalled in cache). Requires multi-cpu
1031 // visibility. Inserted after a FastLock.
1032 class MemBarAcquireLockNode: public MemBarNode {
1033 public:
1034 MemBarAcquireLockNode(Compile* C, int alias_idx, Node* precedent)
1035 : MemBarNode(C, alias_idx, precedent) {}
1036 virtual int Opcode() const;
1037 };
1038
1039 // "Release" - no earlier ref can move after (but later refs can move
1040 // up, like a speculative pipelined cache-hitting Load). Requires
1041 // multi-cpu visibility. Inserted before a FastUnLock.
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