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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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7
hotspot/src/share/vm/opto/memnode.cpp
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@ -925,8 +925,9 @@ Node* MemNode::can_see_stored_value(Node* st, PhaseTransform* phase) const {
// a synchronized region.
while (current->is_Proj()) {
int opc = current->in(0)->Opcode();
if ((final && opc == Op_MemBarAcquire) ||
opc == Op_MemBarRelease || opc == Op_MemBarCPUOrder) {
if ((final && (opc == Op_MemBarAcquire || opc == Op_MemBarAcquireLock)) ||
opc == Op_MemBarRelease || opc == Op_MemBarCPUOrder ||
opc == Op_MemBarReleaseLock) {
Node* mem = current->in(0)->in(TypeFunc::Memory);
if (mem->is_MergeMem()) {
MergeMemNode* merge = mem->as_MergeMem();
@ -2666,6 +2667,8 @@ MemBarNode* MemBarNode::make(Compile* C, int opcode, int atp, Node* pn) {
switch (opcode) {
case Op_MemBarAcquire: return new(C, len) MemBarAcquireNode(C, atp, pn);
case Op_MemBarRelease: return new(C, len) MemBarReleaseNode(C, atp, pn);
case Op_MemBarAcquireLock: return new(C, len) MemBarAcquireLockNode(C, atp, pn);
case Op_MemBarReleaseLock: return new(C, len) MemBarReleaseLockNode(C, atp, pn);
case Op_MemBarVolatile: return new(C, len) MemBarVolatileNode(C, atp, pn);
case Op_MemBarCPUOrder: return new(C, len) MemBarCPUOrderNode(C, atp, pn);
case Op_Initialize: return new(C, len) InitializeNode(C, atp, pn);