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7074017: Introduce MemBarAcquireLock/MemBarReleaseLock nodes for monitor enter/exit code paths

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Replace MemBarAcquire/MemBarRelease nodes on the monitor enter/exit code paths with new MemBarAcquireLock/MemBarReleaseLock nodes

Reviewed-by: kvn, twisti
This commit is contained in:
Roland Westrelin 2011-08-02 18:36:40 +02:00
parent 9cd1a00e3f
commit b543a07b9a
11 changed files with 45 additions and 83 deletions
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4
hotspot/src/share/vm/opto/graphKit.cpp
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@ -2856,7 +2856,7 @@ FastLockNode* GraphKit::shared_lock(Node* obj) {
// lock has no side-effects, sets few values
set_predefined_output_for_runtime_call(lock, mem, TypeRawPtr::BOTTOM);
insert_mem_bar(Op_MemBarAcquire);
insert_mem_bar(Op_MemBarAcquireLock);
// Add this to the worklist so that the lock can be eliminated
record_for_igvn(lock);
@ -2889,7 +2889,7 @@ void GraphKit::shared_unlock(Node* box, Node* obj) {
}
// Memory barrier to avoid floating things down past the locked region
insert_mem_bar(Op_MemBarRelease);
insert_mem_bar(Op_MemBarReleaseLock);
const TypeFunc *tf = OptoRuntime::complete_monitor_exit_Type();
UnlockNode *unlock = new (C, tf->domain()->cnt()) UnlockNode(C, tf);