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comparison src/share/vm/opto/library_call.cpp @ 836:4325cdaa78ad

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6857661: 64-bit server VM: assert(is_Initialize(),"invalid node class") Summary: Move the secondary raw memory barrier to the correct place in generate_arraycopy(). Reviewed-by: never
author kvn
date Mon, 06 Jul 2009 15:53:30 -0700
parents acba6af809c8
children fc4be448891f
comparison
equal deleted inserted replaced
835:73dac61fe300 836:4325cdaa78ad
4498 // (6) length must not be negative. 4498 // (6) length must not be negative.
4499 if (!length_never_negative) { 4499 if (!length_never_negative) {
4500 generate_negative_guard(copy_length, slow_region); 4500 generate_negative_guard(copy_length, slow_region);
4501 } 4501 }
4502 4502
4503 // copy_length is 0.
4503 if (!stopped() && must_clear_dest) { 4504 if (!stopped() && must_clear_dest) {
4504 Node* dest_length = alloc->in(AllocateNode::ALength); 4505 Node* dest_length = alloc->in(AllocateNode::ALength);
4505 if (_gvn.eqv_uncast(copy_length, dest_length) 4506 if (_gvn.eqv_uncast(copy_length, dest_length)
4506 || _gvn.find_int_con(dest_length, 1) <= 0) { 4507 || _gvn.find_int_con(dest_length, 1) <= 0) {
4507 // There is no zeroing to do. 4508 // There is no zeroing to do. No need for a secondary raw memory barrier.
4508 } else { 4509 } else {
4509 // Clear the whole thing since there are no source elements to copy. 4510 // Clear the whole thing since there are no source elements to copy.
4510 generate_clear_array(adr_type, dest, basic_elem_type, 4511 generate_clear_array(adr_type, dest, basic_elem_type,
4511 intcon(0), NULL, 4512 intcon(0), NULL,
4512 alloc->in(AllocateNode::AllocSize)); 4513 alloc->in(AllocateNode::AllocSize));
4514 // Use a secondary InitializeNode as raw memory barrier.
4515 // Currently it is needed only on this path since other
4516 // paths have stub or runtime calls as raw memory barriers.
4517 InitializeNode* init = insert_mem_bar_volatile(Op_Initialize,
4518 Compile::AliasIdxRaw,
4519 top())->as_Initialize();
4520 init->set_complete(&_gvn); // (there is no corresponding AllocateNode)
4513 } 4521 }
4514 } 4522 }
4515
4516 // Use a secondary InitializeNode as raw memory barrier.
4517 // Currently it is needed only on this path since other
4518 // paths have stub or runtime calls as raw memory barriers.
4519 InitializeNode* init = insert_mem_bar_volatile(Op_Initialize,
4520 Compile::AliasIdxRaw,
4521 top())->as_Initialize();
4522 init->set_complete(&_gvn); // (there is no corresponding AllocateNode)
4523 4523
4524 // Present the results of the fast call. 4524 // Present the results of the fast call.
4525 result_region->init_req(zero_path, control()); 4525 result_region->init_req(zero_path, control());
4526 result_i_o ->init_req(zero_path, i_o()); 4526 result_i_o ->init_req(zero_path, i_o());
4527 result_memory->init_req(zero_path, memory(adr_type)); 4527 result_memory->init_req(zero_path, memory(adr_type));