--- old/src/share/vm/opto/addnode.cpp 2012-12-14 14:49:41.227234900 +0100 +++ new/src/share/vm/opto/addnode.cpp 2012-12-14 14:49:41.064206014 +0100 @@ -189,6 +189,11 @@ set_req(1, addx); set_req(2, a22); progress = this; + PhaseIterGVN *igvn = phase->is_IterGVN(); + if (add2->outcnt() == 0 && igvn) { + // add disconnected. + igvn->_worklist.push(add2); + } } } @@ -624,6 +629,11 @@ if( t22->singleton() && (t22 != Type::TOP) ) { // Right input is an add of a constant? set_req(Address, phase->transform(new (phase->C) AddPNode(in(Base),in(Address),add->in(1)))); set_req(Offset, add->in(2)); + PhaseIterGVN *igvn = phase->is_IterGVN(); + if (add->outcnt() == 0 && igvn) { + // add disconnected. + igvn->_worklist.push((Node*)add); + } return this; // Made progress } }