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comparison src/share/vm/opto/library_call.cpp @ 3961:a92cdbac8b9e

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7081933: Use zeroing elimination optimization for large array Summary: Don't zero new typeArray during runtime call if the allocation is followed by arraycopy into it. Reviewed-by: twisti
author kvn
date Mon, 26 Sep 2011 10:24:05 -0700
parents b2cb497dec28
children 52b5d32fbfaf 069ab3f976d3
comparison
equal deleted inserted replaced
3960:f08d439fab8c 3961:a92cdbac8b9e
4656 && _gvn.find_int_con(alloc->in(AllocateNode::ALength), 1) > 0 4656 && _gvn.find_int_con(alloc->in(AllocateNode::ALength), 1) > 0
4657 && alloc->maybe_set_complete(&_gvn)) { 4657 && alloc->maybe_set_complete(&_gvn)) {
4658 // "You break it, you buy it." 4658 // "You break it, you buy it."
4659 InitializeNode* init = alloc->initialization(); 4659 InitializeNode* init = alloc->initialization();
4660 assert(init->is_complete(), "we just did this"); 4660 assert(init->is_complete(), "we just did this");
4661 init->set_complete_with_arraycopy();
4661 assert(dest->is_CheckCastPP(), "sanity"); 4662 assert(dest->is_CheckCastPP(), "sanity");
4662 assert(dest->in(0)->in(0) == init, "dest pinned"); 4663 assert(dest->in(0)->in(0) == init, "dest pinned");
4663 adr_type = TypeRawPtr::BOTTOM; // all initializations are into raw memory 4664 adr_type = TypeRawPtr::BOTTOM; // all initializations are into raw memory
4664 // From this point on, every exit path is responsible for 4665 // From this point on, every exit path is responsible for
4665 // initializing any non-copied parts of the object to zero. 4666 // initializing any non-copied parts of the object to zero.