src/share/vm/opto/memnode.hpp
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rev 10271 : 8147844: new method j.l.Runtime.onSpinWait() and the corresponding x86 hotspot instrinsic
Summary: adds c1 & c2 x86 intrinsics for j.l.Runtime.onSpinWait() that utilize the PAUSE instruction
Reviewed-by: iveresov, kvn, vlivanov
Contributed-by: Ivan Krylov <ivan@azul.com>, Yuri Gaevsky <ygaevsky@azul.com>
*** 1084,1093 ****
--- 1084,1100 ----
: MemBarNode(C, alias_idx, precedent) {}
virtual int Opcode() const;
virtual uint ideal_reg() const { return 0; } // not matched in the AD file
};
+ class OnSpinWaitNode: public MemBarNode {
+ public:
+ OnSpinWaitNode(Compile* C, int alias_idx, Node* precedent)
+ : MemBarNode(C, alias_idx, precedent) {}
+ virtual int Opcode() const;
+ };
+
// Isolation of object setup after an AllocateNode and before next safepoint.
// (See comment in memnode.cpp near InitializeNode::InitializeNode for semantics.)
class InitializeNode: public MemBarNode {
friend class AllocateNode;