6667581: Don't generate initialization (by 0) code for arrays with size 0
authorkvn
Fri, 29 Feb 2008 11:22:27 -0800
changeset 207 694076d0755f
parent 206 d61cf247afd5
child 208 40859a3e0db9
6667581: Don't generate initialization (by 0) code for arrays with size 0 Summary: generate_arraycopy() does not check the size of allocated array. Reviewed-by: jrose, never
hotspot/src/share/vm/opto/library_call.cpp
--- a/hotspot/src/share/vm/opto/library_call.cpp	Fri Feb 29 09:57:18 2008 -0800
+++ b/hotspot/src/share/vm/opto/library_call.cpp	Fri Feb 29 11:22:27 2008 -0800
@@ -4170,6 +4170,7 @@
       && !_gvn.eqv_uncast(src, dest)
       && ((alloc = tightly_coupled_allocation(dest, slow_region))
           != NULL)
+      && _gvn.find_int_con(alloc->in(AllocateNode::ALength), 1) > 0
       && alloc->maybe_set_complete(&_gvn)) {
     // "You break it, you buy it."
     InitializeNode* init = alloc->initialization();