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6259129: (Escape Analysis) scalar replacement for not escaping objects

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Use scalar replacement with EA to remove allocations for objects which do not escape the compiled method.

Reviewed-by: rasbold, never, jrose
This commit is contained in:
Vladimir Kozlov 2008-03-20 13:51:55 -07:00
parent a2b4f55757
commit 1ba2523386
3 changed files with 670 additions and 11 deletions
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9
hotspot/src/share/vm/opto/macro.hpp
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@ -78,6 +78,15 @@ private:
Node* length,
const TypeFunc* slow_call_type,
address slow_call_address);
Node *value_from_mem(Node *mem, BasicType ft, const Type *ftype, const TypeOopPtr *adr_t, Node *alloc);
Node *value_from_mem_phi(Node *mem, BasicType ft, const Type *ftype, const TypeOopPtr *adr_t, Node *alloc, int level);
bool eliminate_allocate_node(AllocateNode *alloc);
bool can_eliminate_allocation(AllocateNode *alloc, GrowableArray <SafePointNode *>& safepoints);
bool scalar_replacement(AllocateNode *alloc, GrowableArray <SafePointNode *>& safepoints_done);
void process_users_of_allocation(AllocateNode *alloc);
void eliminate_card_mark(Node *cm);
bool eliminate_locking_node(AbstractLockNode *alock);
void expand_lock_node(LockNode *lock);
void expand_unlock_node(UnlockNode *unlock);