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6892658: C2 should optimize some stringbuilder patterns

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Reviewed-by: kvn, twisti
This commit is contained in:
Tom Rodriguez 2009-11-12 09:24:21 -08:00
parent 63cc2211ed
commit 9db2092b1b
35 changed files with 2245 additions and 115 deletions
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38
hotspot/src/share/vm/opto/macro.cpp
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@ -912,15 +912,29 @@ bool PhaseMacroExpand::eliminate_allocate_node(AllocateNode *alloc) {
return false;
}
CompileLog* log = C->log();
if (log != NULL) {
Node* klass = alloc->in(AllocateNode::KlassNode);
const TypeKlassPtr* tklass = _igvn.type(klass)->is_klassptr();
log->head("eliminate_allocation type='%d'",
log->identify(tklass->klass()));
JVMState* p = alloc->jvms();
while (p != NULL) {
log->elem("jvms bci='%d' method='%d'", p->bci(), log->identify(p->method()));
p = p->caller();
}
log->tail("eliminate_allocation");
}
process_users_of_allocation(alloc);
#ifndef PRODUCT
if (PrintEliminateAllocations) {
if (alloc->is_AllocateArray())
tty->print_cr("++++ Eliminated: %d AllocateArray", alloc->_idx);
else
tty->print_cr("++++ Eliminated: %d Allocate", alloc->_idx);
}
if (PrintEliminateAllocations) {
if (alloc->is_AllocateArray())
tty->print_cr("++++ Eliminated: %d AllocateArray", alloc->_idx);
else
tty->print_cr("++++ Eliminated: %d Allocate", alloc->_idx);
}
#endif
return true;
@ -1639,6 +1653,18 @@ bool PhaseMacroExpand::eliminate_locking_node(AbstractLockNode *alock) {
} // if (!oldbox->is_eliminated())
} // if (alock->is_Lock() && !lock->is_coarsened())
CompileLog* log = C->log();
if (log != NULL) {
log->head("eliminate_lock lock='%d'",
alock->is_Lock());
JVMState* p = alock->jvms();
while (p != NULL) {
log->elem("jvms bci='%d' method='%d'", p->bci(), log->identify(p->method()));
p = p->caller();
}
log->tail("eliminate_lock");
}
#ifndef PRODUCT
if (PrintEliminateLocks) {
if (alock->is_Lock()) {