aoqi@0: /*
aoqi@0:  * Copyright (c) 2005, 2013, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  *
aoqi@0:  */
aoqi@0: 
aoqi@0: #include "precompiled.hpp"
aoqi@0: #include "opto/addnode.hpp"
aoqi@0: #include "opto/callnode.hpp"
aoqi@0: #include "opto/cfgnode.hpp"
aoqi@0: #include "opto/idealKit.hpp"
aoqi@0: #include "opto/runtime.hpp"
aoqi@0: 
aoqi@0: // Static initialization
aoqi@0: 
aoqi@0: // This declares the position where vars are kept in the cvstate
aoqi@0: // For some degree of consistency we use the TypeFunc enum to
aoqi@0: // soak up spots in the inputs even though we only use early Control
aoqi@0: // and Memory slots. (So far.)
aoqi@0: const uint IdealKit::first_var = TypeFunc::Parms + 1;
aoqi@0: 
aoqi@0: //----------------------------IdealKit-----------------------------------------
aoqi@0: IdealKit::IdealKit(GraphKit* gkit, bool delay_all_transforms, bool has_declarations) :
aoqi@0:   _gvn(gkit->gvn()), C(gkit->C) {
aoqi@0:   _initial_ctrl = gkit->control();
aoqi@0:   _initial_memory = gkit->merged_memory();
aoqi@0:   _initial_i_o = gkit->i_o();
aoqi@0:   _delay_all_transforms = delay_all_transforms;
aoqi@0:   _var_ct = 0;
aoqi@0:   _cvstate = NULL;
aoqi@0:   // We can go memory state free or else we need the entire memory state
aoqi@0:   assert(_initial_memory == NULL || _initial_memory->Opcode() == Op_MergeMem, "memory must be pre-split");
aoqi@0:   assert(!_gvn.is_IterGVN(), "IdealKit can't be used during Optimize phase");
aoqi@0:   int init_size = 5;
aoqi@0:   _pending_cvstates = new (C->node_arena()) GrowableArray<Node*>(C->node_arena(), init_size, 0, 0);
aoqi@0:   DEBUG_ONLY(_state = new (C->node_arena()) GrowableArray<int>(C->node_arena(), init_size, 0, 0));
aoqi@0:   if (!has_declarations) {
aoqi@0:      declarations_done();
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: //----------------------------sync_kit-----------------------------------------
aoqi@0: void IdealKit::sync_kit(GraphKit* gkit) {
aoqi@0:   set_all_memory(gkit->merged_memory());
aoqi@0:   set_i_o(gkit->i_o());
aoqi@0:   set_ctrl(gkit->control());
aoqi@0: }
aoqi@0: 
aoqi@0: //-------------------------------if_then-------------------------------------
aoqi@0: // Create:  if(left relop right)
aoqi@0: //          /  \
aoqi@0: //   iffalse    iftrue
aoqi@0: // Push the iffalse cvstate onto the stack. The iftrue becomes the current cvstate.
aoqi@0: void IdealKit::if_then(Node* left, BoolTest::mask relop,
aoqi@0:                        Node* right, float prob, float cnt, bool push_new_state) {
aoqi@0:   assert((state() & (BlockS|LoopS|IfThenS|ElseS)), "bad state for new If");
aoqi@0:   Node* bol;
aoqi@0:   if (left->bottom_type()->isa_ptr() == NULL) {
aoqi@0:     if (left->bottom_type()->isa_int() != NULL) {
aoqi@0:       bol = Bool(CmpI(left, right), relop);
aoqi@0:     } else {
aoqi@0:       assert(left->bottom_type()->isa_long() != NULL, "what else?");
aoqi@0:       bol = Bool(CmpL(left, right), relop);
aoqi@0:     }
aoqi@0: 
aoqi@0:   } else {
aoqi@0:     bol = Bool(CmpP(left, right), relop);
aoqi@0:   }
aoqi@0:   // Delay gvn.tranform on if-nodes until construction is finished
aoqi@0:   // to prevent a constant bool input from discarding a control output.
aoqi@0:   IfNode* iff = delay_transform(new (C) IfNode(ctrl(), bol, prob, cnt))->as_If();
aoqi@0:   Node* then  = IfTrue(iff);
aoqi@0:   Node* elsen = IfFalse(iff);
aoqi@0:   Node* else_cvstate = copy_cvstate();
aoqi@0:   else_cvstate->set_req(TypeFunc::Control, elsen);
aoqi@0:   _pending_cvstates->push(else_cvstate);
aoqi@0:   DEBUG_ONLY(if (push_new_state) _state->push(IfThenS));
aoqi@0:   set_ctrl(then);
aoqi@0: }
aoqi@0: 
aoqi@0: //-------------------------------else_-------------------------------------
aoqi@0: // Pop the else cvstate off the stack, and push the (current) then cvstate.
aoqi@0: // The else cvstate becomes the current cvstate.
aoqi@0: void IdealKit::else_() {
aoqi@0:   assert(state() == IfThenS, "bad state for new Else");
aoqi@0:   Node* else_cvstate = _pending_cvstates->pop();
aoqi@0:   DEBUG_ONLY(_state->pop());
aoqi@0:   // save current (then) cvstate for later use at endif
aoqi@0:   _pending_cvstates->push(_cvstate);
aoqi@0:   DEBUG_ONLY(_state->push(ElseS));
aoqi@0:   _cvstate = else_cvstate;
aoqi@0: }
aoqi@0: 
aoqi@0: //-------------------------------end_if-------------------------------------
aoqi@0: // Merge the "then" and "else" cvstates.
aoqi@0: //
aoqi@0: // The if_then() pushed a copy of the current state for later use
aoqi@0: // as the initial state for a future "else" clause.  The
aoqi@0: // current state then became the initial state for the
aoqi@0: // then clause.  If an "else" clause was encountered, it will
aoqi@0: // pop the top state and use it for it's initial state.
aoqi@0: // It will also push the current state (the state at the end of
aoqi@0: // the "then" clause) for latter use at the end_if.
aoqi@0: //
aoqi@0: // At the endif, the states are:
aoqi@0: // 1) else exists a) current state is end of "else" clause
aoqi@0: //                b) top stack state is end of "then" clause
aoqi@0: //
aoqi@0: // 2) no else:    a) current state is end of "then" clause
aoqi@0: //                b) top stack state is from the "if_then" which
aoqi@0: //                   would have been the initial state of the else.
aoqi@0: //
aoqi@0: // Merging the states is accomplished by:
aoqi@0: //   1) make a label for the merge
aoqi@0: //   2) terminate the current state with a goto to the label
aoqi@0: //   3) pop the top state from the stack and make it the
aoqi@0: //        current state
aoqi@0: //   4) bind the label at the current state.  Binding a label
aoqi@0: //        terminates the current state with a goto to the
aoqi@0: //        label and makes the label's state the current state.
aoqi@0: //
aoqi@0: void IdealKit::end_if() {
aoqi@0:   assert(state() & (IfThenS|ElseS), "bad state for new Endif");
aoqi@0:   Node* lab = make_label(1);
aoqi@0: 
aoqi@0:   // Node* join_state = _pending_cvstates->pop();
aoqi@0:                   /* merging, join */
aoqi@0:   goto_(lab);
aoqi@0:   _cvstate = _pending_cvstates->pop();
aoqi@0: 
aoqi@0:   bind(lab);
aoqi@0:   DEBUG_ONLY(_state->pop());
aoqi@0: }
aoqi@0: 
aoqi@0: //-------------------------------loop-------------------------------------
aoqi@0: // Create the loop head portion (*) of:
aoqi@0: //  *     iv = init
aoqi@0: //  *  top: (region node)
aoqi@0: //  *     if (iv relop limit) {
aoqi@0: //           loop body
aoqi@0: //           i = i + 1
aoqi@0: //           goto top
aoqi@0: //  *     } else // exits loop
aoqi@0: //
aoqi@0: // Pushes the loop top cvstate first, then the else (loop exit) cvstate
aoqi@0: // onto the stack.
aoqi@0: void IdealKit::loop(GraphKit* gkit, int nargs, IdealVariable& iv, Node* init, BoolTest::mask relop, Node* limit, float prob, float cnt) {
aoqi@0:   assert((state() & (BlockS|LoopS|IfThenS|ElseS)), "bad state for new loop");
aoqi@0:   if (UseLoopPredicate) {
aoqi@0:     // Sync IdealKit and graphKit.
aoqi@0:     gkit->sync_kit(*this);
aoqi@0:     // Add loop predicate.
aoqi@0:     gkit->add_predicate(nargs);
aoqi@0:     // Update IdealKit memory.
aoqi@0:     sync_kit(gkit);
aoqi@0:   }
aoqi@0:   set(iv, init);
aoqi@0:   Node* head = make_label(1);
aoqi@0:   bind(head);
aoqi@0:   _pending_cvstates->push(head); // push for use at end_loop
aoqi@0:   _cvstate = copy_cvstate();
aoqi@0:   if_then(value(iv), relop, limit, prob, cnt, false /* no new state */);
aoqi@0:   DEBUG_ONLY(_state->push(LoopS));
aoqi@0:   assert(ctrl()->is_IfTrue(), "true branch stays in loop");
aoqi@0:   assert(_pending_cvstates->top()->in(TypeFunc::Control)->is_IfFalse(), "false branch exits loop");
aoqi@0: }
aoqi@0: 
aoqi@0: //-------------------------------end_loop-------------------------------------
aoqi@0: // Creates the goto top label.
aoqi@0: // Expects the else (loop exit) cvstate to be on top of the
aoqi@0: // stack, and the loop top cvstate to be 2nd.
aoqi@0: void IdealKit::end_loop() {
aoqi@0:   assert((state() == LoopS), "bad state for new end_loop");
aoqi@0:   Node* exit = _pending_cvstates->pop();
aoqi@0:   Node* head = _pending_cvstates->pop();
aoqi@0:   goto_(head);
aoqi@0:   clear(head);
aoqi@0:   DEBUG_ONLY(_state->pop());
aoqi@0:   _cvstate = exit;
aoqi@0: }
aoqi@0: 
aoqi@0: //-------------------------------make_label-------------------------------------
aoqi@0: // Creates a label.  The number of goto's
aoqi@0: // must be specified (which should be 1 less than
aoqi@0: // the number of precedessors.)
aoqi@0: Node* IdealKit::make_label(int goto_ct) {
aoqi@0:   assert(_cvstate != NULL, "must declare variables before labels");
aoqi@0:   Node* lab = new_cvstate();
aoqi@0:   int sz = 1 + goto_ct + 1 /* fall thru */;
aoqi@0:   Node* reg = delay_transform(new (C) RegionNode(sz));
aoqi@0:   lab->init_req(TypeFunc::Control, reg);
aoqi@0:   return lab;
aoqi@0: }
aoqi@0: 
aoqi@0: //-------------------------------bind-------------------------------------
aoqi@0: // Bind a label at the current cvstate by simulating
aoqi@0: // a goto to the label.
aoqi@0: void IdealKit::bind(Node* lab) {
aoqi@0:   goto_(lab, true /* bind */);
aoqi@0:   _cvstate = lab;
aoqi@0: }
aoqi@0: 
aoqi@0: //-------------------------------goto_-------------------------------------
aoqi@0: // Make the current cvstate a predecessor of the label,
aoqi@0: // creating phi's to merge values.  If bind is true and
aoqi@0: // this is not the last control edge, then ensure that
aoqi@0: // all live values have phis created. Used to create phis
aoqi@0: // at loop-top regions.
aoqi@0: void IdealKit::goto_(Node* lab, bool bind) {
aoqi@0:   Node* reg = lab->in(TypeFunc::Control);
aoqi@0:   // find next empty slot in region
aoqi@0:   uint slot = 1;
aoqi@0:   while (slot < reg->req() && reg->in(slot) != NULL) slot++;
aoqi@0:   assert(slot < reg->req(), "too many gotos");
aoqi@0:   // If this is last predecessor, then don't force phi creation
aoqi@0:   if (slot == reg->req() - 1) bind = false;
aoqi@0:   reg->init_req(slot, ctrl());
aoqi@0:   assert(first_var + _var_ct == _cvstate->req(), "bad _cvstate size");
aoqi@0:   for (uint i = first_var; i < _cvstate->req(); i++) {
aoqi@0: 
aoqi@0:     // l is the value of var reaching the label. Could be a single value
aoqi@0:     // reaching the label, or a phi that merges multiples values reaching
aoqi@0:     // the label.  The latter is true if the label's input: in(..) is
aoqi@0:     // a phi whose control input is the region node for the label.
aoqi@0: 
aoqi@0:     Node* l = lab->in(i);
aoqi@0:     // Get the current value of the var
aoqi@0:     Node* m = _cvstate->in(i);
aoqi@0:     // If the var went unused no need for a phi
aoqi@0:     if (m == NULL) {
aoqi@0:       continue;
aoqi@0:     } else if (l == NULL || m == l) {
aoqi@0:       // Only one unique value "m" is known to reach this label so a phi
aoqi@0:       // is not yet necessary unless:
aoqi@0:       //    the label is being bound and all predecessors have not been seen,
aoqi@0:       //    in which case "bind" will be true.
aoqi@0:       if (bind) {
aoqi@0:         m = promote_to_phi(m, reg);
aoqi@0:       }
aoqi@0:       // Record the phi/value used for this var in the label's cvstate
aoqi@0:       lab->set_req(i, m);
aoqi@0:     } else {
aoqi@0:       // More than one value for the variable reaches this label so
aoqi@0:       // a create a phi if one does not already exist.
aoqi@0:       if (!was_promoted_to_phi(l, reg)) {
aoqi@0:         l = promote_to_phi(l, reg);
aoqi@0:         lab->set_req(i, l);
aoqi@0:       }
aoqi@0:       // Record in the phi, the var's value from the current state
aoqi@0:       l->set_req(slot, m);
aoqi@0:     }
aoqi@0:   }
aoqi@0:   do_memory_merge(_cvstate, lab);
aoqi@0:   stop();
aoqi@0: }
aoqi@0: 
aoqi@0: //-----------------------------promote_to_phi-----------------------------------
aoqi@0: Node* IdealKit::promote_to_phi(Node* n, Node* reg) {
aoqi@0:   assert(!was_promoted_to_phi(n, reg), "n already promoted to phi on this region");
aoqi@0:   // Get a conservative type for the phi
aoqi@0:   const BasicType bt = n->bottom_type()->basic_type();
aoqi@0:   const Type* ct = Type::get_const_basic_type(bt);
aoqi@0:   return delay_transform(PhiNode::make(reg, n, ct));
aoqi@0: }
aoqi@0: 
aoqi@0: //-----------------------------declarations_done-------------------------------
aoqi@0: void IdealKit::declarations_done() {
aoqi@0:   _cvstate = new_cvstate();   // initialize current cvstate
aoqi@0:   set_ctrl(_initial_ctrl);    // initialize control in current cvstate
aoqi@0:   set_all_memory(_initial_memory);// initialize memory in current cvstate
aoqi@0:   set_i_o(_initial_i_o);      // initialize i_o in current cvstate
aoqi@0:   DEBUG_ONLY(_state->push(BlockS));
aoqi@0: }
aoqi@0: 
aoqi@0: //-----------------------------transform-----------------------------------
aoqi@0: Node* IdealKit::transform(Node* n) {
aoqi@0:   if (_delay_all_transforms) {
aoqi@0:     return delay_transform(n);
aoqi@0:   } else {
aoqi@0:     n = gvn().transform(n);
aoqi@0:     C->record_for_igvn(n);
aoqi@0:     return n;
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: //-----------------------------delay_transform-----------------------------------
aoqi@0: Node* IdealKit::delay_transform(Node* n) {
aoqi@0:   // Delay transform until IterativeGVN
aoqi@0:   gvn().set_type(n, n->bottom_type());
aoqi@0:   C->record_for_igvn(n);
aoqi@0:   return n;
aoqi@0: }
aoqi@0: 
aoqi@0: //-----------------------------new_cvstate-----------------------------------
aoqi@0: Node* IdealKit::new_cvstate() {
aoqi@0:   uint sz = _var_ct + first_var;
aoqi@0:   return new (C) Node(sz);
aoqi@0: }
aoqi@0: 
aoqi@0: //-----------------------------copy_cvstate-----------------------------------
aoqi@0: Node* IdealKit::copy_cvstate() {
aoqi@0:   Node* ns = new_cvstate();
aoqi@0:   for (uint i = 0; i < ns->req(); i++) ns->init_req(i, _cvstate->in(i));
aoqi@0:   // We must clone memory since it will be updated as we do stores.
aoqi@0:   ns->set_req(TypeFunc::Memory, MergeMemNode::make(C, ns->in(TypeFunc::Memory)));
aoqi@0:   return ns;
aoqi@0: }
aoqi@0: 
aoqi@0: //-----------------------------clear-----------------------------------
aoqi@0: void IdealKit::clear(Node* m) {
aoqi@0:   for (uint i = 0; i < m->req(); i++) m->set_req(i, NULL);
aoqi@0: }
aoqi@0: 
aoqi@0: //-----------------------------IdealVariable----------------------------
aoqi@0: IdealVariable::IdealVariable(IdealKit &k) {
aoqi@0:   k.declare(this);
aoqi@0: }
aoqi@0: 
aoqi@0: Node* IdealKit::memory(uint alias_idx) {
aoqi@0:   MergeMemNode* mem = merged_memory();
aoqi@0:   Node* p = mem->memory_at(alias_idx);
aoqi@0:   _gvn.set_type(p, Type::MEMORY);  // must be mapped
aoqi@0:   return p;
aoqi@0: }
aoqi@0: 
aoqi@0: void IdealKit::set_memory(Node* mem, uint alias_idx) {
aoqi@0:   merged_memory()->set_memory_at(alias_idx, mem);
aoqi@0: }
aoqi@0: 
aoqi@0: //----------------------------- make_load ----------------------------
aoqi@0: Node* IdealKit::load(Node* ctl,
aoqi@0:                      Node* adr,
aoqi@0:                      const Type* t,
aoqi@0:                      BasicType bt,
aoqi@0:                      int adr_idx,
aoqi@0:                      bool require_atomic_access) {
aoqi@0: 
aoqi@0:   assert(adr_idx != Compile::AliasIdxTop, "use other make_load factory" );
aoqi@0:   const TypePtr* adr_type = NULL; // debug-mode-only argument
aoqi@0:   debug_only(adr_type = C->get_adr_type(adr_idx));
aoqi@0:   Node* mem = memory(adr_idx);
aoqi@0:   Node* ld;
aoqi@0:   if (require_atomic_access && bt == T_LONG) {
aoqi@0:     ld = LoadLNode::make_atomic(C, ctl, mem, adr, adr_type, t, MemNode::unordered);
aoqi@0:   } else {
aoqi@0:     ld = LoadNode::make(_gvn, ctl, mem, adr, adr_type, t, bt, MemNode::unordered);
aoqi@0:   }
aoqi@0:   return transform(ld);
aoqi@0: }
aoqi@0: 
aoqi@0: Node* IdealKit::store(Node* ctl, Node* adr, Node *val, BasicType bt,
aoqi@0:                       int adr_idx,
aoqi@0:                       MemNode::MemOrd mo, bool require_atomic_access) {
aoqi@0:   assert(adr_idx != Compile::AliasIdxTop, "use other store_to_memory factory");
aoqi@0:   const TypePtr* adr_type = NULL;
aoqi@0:   debug_only(adr_type = C->get_adr_type(adr_idx));
aoqi@0:   Node *mem = memory(adr_idx);
aoqi@0:   Node* st;
aoqi@0:   if (require_atomic_access && bt == T_LONG) {
aoqi@0:     st = StoreLNode::make_atomic(C, ctl, mem, adr, adr_type, val, mo);
aoqi@0:   } else {
aoqi@0:     st = StoreNode::make(_gvn, ctl, mem, adr, adr_type, val, bt, mo);
aoqi@0:   }
aoqi@0:   st = transform(st);
aoqi@0:   set_memory(st, adr_idx);
aoqi@0: 
aoqi@0:   return st;
aoqi@0: }
aoqi@0: 
aoqi@0: // Card mark store. Must be ordered so that it will come after the store of
aoqi@0: // the oop.
aoqi@0: Node* IdealKit::storeCM(Node* ctl, Node* adr, Node *val, Node* oop_store, int oop_adr_idx,
aoqi@0:                         BasicType bt,
aoqi@0:                         int adr_idx) {
aoqi@0:   assert(adr_idx != Compile::AliasIdxTop, "use other store_to_memory factory" );
aoqi@0:   const TypePtr* adr_type = NULL;
aoqi@0:   debug_only(adr_type = C->get_adr_type(adr_idx));
aoqi@0:   Node *mem = memory(adr_idx);
aoqi@0: 
aoqi@0:   // Add required edge to oop_store, optimizer does not support precedence edges.
aoqi@0:   // Convert required edge to precedence edge before allocation.
aoqi@0:   Node* st = new (C) StoreCMNode(ctl, mem, adr, adr_type, val, oop_store, oop_adr_idx);
aoqi@0: 
aoqi@0:   st = transform(st);
aoqi@0:   set_memory(st, adr_idx);
aoqi@0: 
aoqi@0:   return st;
aoqi@0: }
aoqi@0: 
aoqi@0: //---------------------------- do_memory_merge --------------------------------
aoqi@0: // The memory from one merging cvstate needs to be merged with the memory for another
aoqi@0: // join cvstate. If the join cvstate doesn't have a merged memory yet then we
aoqi@0: // can just copy the state from the merging cvstate
aoqi@0: 
aoqi@0: // Merge one slow path into the rest of memory.
aoqi@0: void IdealKit::do_memory_merge(Node* merging, Node* join) {
aoqi@0: 
aoqi@0:   // Get the region for the join state
aoqi@0:   Node* join_region = join->in(TypeFunc::Control);
aoqi@0:   assert(join_region != NULL, "join region must exist");
aoqi@0:   if (join->in(TypeFunc::I_O) == NULL ) {
aoqi@0:     join->set_req(TypeFunc::I_O,  merging->in(TypeFunc::I_O));
aoqi@0:   }
aoqi@0:   if (join->in(TypeFunc::Memory) == NULL ) {
aoqi@0:     join->set_req(TypeFunc::Memory,  merging->in(TypeFunc::Memory));
aoqi@0:     return;
aoqi@0:   }
aoqi@0: 
aoqi@0:   // The control flow for merging must have already been attached to the join region
aoqi@0:   // we need its index for the phis.
aoqi@0:   uint slot;
aoqi@0:   for (slot = 1; slot < join_region->req() ; slot ++ ) {
aoqi@0:     if (join_region->in(slot) == merging->in(TypeFunc::Control)) break;
aoqi@0:   }
aoqi@0:   assert(slot !=  join_region->req(), "edge must already exist");
aoqi@0: 
aoqi@0:   MergeMemNode* join_m    = join->in(TypeFunc::Memory)->as_MergeMem();
aoqi@0:   MergeMemNode* merging_m = merging->in(TypeFunc::Memory)->as_MergeMem();
aoqi@0: 
aoqi@0:   // join_m should be an ancestor mergemem of merging
aoqi@0:   // Slow path memory comes from the current map (which is from a slow call)
aoqi@0:   // Fast path/null path memory comes from the call's input
aoqi@0: 
aoqi@0:   // Merge the other fast-memory inputs with the new slow-default memory.
aoqi@0:   // for (MergeMemStream mms(merged_memory(), fast_mem->as_MergeMem()); mms.next_non_empty2(); ) {
aoqi@0:   for (MergeMemStream mms(join_m, merging_m); mms.next_non_empty2(); ) {
aoqi@0:     Node* join_slice = mms.force_memory();
aoqi@0:     Node* merging_slice = mms.memory2();
aoqi@0:     if (join_slice != merging_slice) {
aoqi@0:       PhiNode* phi;
aoqi@0:       // bool new_phi = false;
aoqi@0:       // Is the phi for this slice one that we created for this join region or simply
aoqi@0:       // one we copied? If it is ours then add
aoqi@0:       if (join_slice->is_Phi() && join_slice->as_Phi()->region() == join_region) {
aoqi@0:         phi = join_slice->as_Phi();
aoqi@0:       } else {
aoqi@0:         // create the phi with join_slice filling supplying memory for all of the
aoqi@0:         // control edges to the join region
aoqi@0:         phi = PhiNode::make(join_region, join_slice, Type::MEMORY, mms.adr_type(C));
aoqi@0:         phi = (PhiNode*) delay_transform(phi);
aoqi@0:         // gvn().set_type(phi, Type::MEMORY);
aoqi@0:         // new_phi = true;
aoqi@0:       }
aoqi@0:       // Now update the phi with the slice for the merging slice
aoqi@0:       phi->set_req(slot, merging_slice/* slow_path, slow_slice */);
aoqi@0:       // this updates join_m with the phi
aoqi@0:       mms.set_memory(phi);
aoqi@0:     }
aoqi@0:   }
aoqi@0: 
aoqi@0:   Node* join_io    = join->in(TypeFunc::I_O);
aoqi@0:   Node* merging_io = merging->in(TypeFunc::I_O);
aoqi@0:   if (join_io != merging_io) {
aoqi@0:     PhiNode* phi;
aoqi@0:     if (join_io->is_Phi() && join_io->as_Phi()->region() == join_region) {
aoqi@0:       phi = join_io->as_Phi();
aoqi@0:     } else {
aoqi@0:       phi = PhiNode::make(join_region, join_io, Type::ABIO);
aoqi@0:       phi = (PhiNode*) delay_transform(phi);
aoqi@0:       join->set_req(TypeFunc::I_O, phi);
aoqi@0:     }
aoqi@0:     phi->set_req(slot, merging_io);
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: //----------------------------- make_call  ----------------------------
aoqi@0: // Trivial runtime call
aoqi@0: void IdealKit::make_leaf_call(const TypeFunc *slow_call_type,
aoqi@0:                               address slow_call,
aoqi@0:                               const char *leaf_name,
aoqi@0:                               Node* parm0,
aoqi@0:                               Node* parm1,
aoqi@0:                               Node* parm2,
aoqi@0:                               Node* parm3) {
aoqi@0: 
aoqi@0:   // We only handle taking in RawMem and modifying RawMem
aoqi@0:   const TypePtr* adr_type = TypeRawPtr::BOTTOM;
aoqi@0:   uint adr_idx = C->get_alias_index(adr_type);
aoqi@0: 
aoqi@0:   // Slow-path leaf call
aoqi@0:   CallNode *call =  (CallNode*)new (C) CallLeafNode( slow_call_type, slow_call, leaf_name, adr_type);
aoqi@0: 
aoqi@0:   // Set fixed predefined input arguments
aoqi@0:   call->init_req( TypeFunc::Control, ctrl() );
aoqi@0:   call->init_req( TypeFunc::I_O    , top() )     ;   // does no i/o
aoqi@0:   // Narrow memory as only memory input
aoqi@0:   call->init_req( TypeFunc::Memory , memory(adr_idx));
aoqi@0:   call->init_req( TypeFunc::FramePtr, top() /* frameptr() */ );
aoqi@0:   call->init_req( TypeFunc::ReturnAdr, top() );
aoqi@0: 
aoqi@0:   if (parm0 != NULL)  call->init_req(TypeFunc::Parms+0, parm0);
aoqi@0:   if (parm1 != NULL)  call->init_req(TypeFunc::Parms+1, parm1);
aoqi@0:   if (parm2 != NULL)  call->init_req(TypeFunc::Parms+2, parm2);
aoqi@0:   if (parm3 != NULL)  call->init_req(TypeFunc::Parms+3, parm3);
aoqi@0: 
aoqi@0:   // Node *c = _gvn.transform(call);
aoqi@0:   call = (CallNode *) _gvn.transform(call);
aoqi@0:   Node *c = call; // dbx gets confused with call call->dump()
aoqi@0: 
aoqi@0:   // Slow leaf call has no side-effects, sets few values
aoqi@0: 
aoqi@0:   set_ctrl(transform( new (C) ProjNode(call,TypeFunc::Control) ));
aoqi@0: 
aoqi@0:   // Make memory for the call
aoqi@0:   Node* mem = _gvn.transform( new (C) ProjNode(call, TypeFunc::Memory) );
aoqi@0: 
aoqi@0:   // Set the RawPtr memory state only.
aoqi@0:   set_memory(mem, adr_idx);
aoqi@0: 
aoqi@0:   assert(C->alias_type(call->adr_type()) == C->alias_type(adr_type),
aoqi@0:          "call node must be constructed correctly");
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: void IdealKit::make_leaf_call_no_fp(const TypeFunc *slow_call_type,
aoqi@0:                               address slow_call,
aoqi@0:                               const char *leaf_name,
aoqi@0:                               const TypePtr* adr_type,
aoqi@0:                               Node* parm0,
aoqi@0:                               Node* parm1,
aoqi@0:                               Node* parm2,
aoqi@0:                               Node* parm3) {
aoqi@0: 
aoqi@0:   // We only handle taking in RawMem and modifying RawMem
aoqi@0:   uint adr_idx = C->get_alias_index(adr_type);
aoqi@0: 
aoqi@0:   // Slow-path leaf call
aoqi@0:   CallNode *call =  (CallNode*)new (C) CallLeafNoFPNode( slow_call_type, slow_call, leaf_name, adr_type);
aoqi@0: 
aoqi@0:   // Set fixed predefined input arguments
aoqi@0:   call->init_req( TypeFunc::Control, ctrl() );
aoqi@0:   call->init_req( TypeFunc::I_O    , top() )     ;   // does no i/o
aoqi@0:   // Narrow memory as only memory input
aoqi@0:   call->init_req( TypeFunc::Memory , memory(adr_idx));
aoqi@0:   call->init_req( TypeFunc::FramePtr, top() /* frameptr() */ );
aoqi@0:   call->init_req( TypeFunc::ReturnAdr, top() );
aoqi@0: 
aoqi@0:   if (parm0 != NULL)  call->init_req(TypeFunc::Parms+0, parm0);
aoqi@0:   if (parm1 != NULL)  call->init_req(TypeFunc::Parms+1, parm1);
aoqi@0:   if (parm2 != NULL)  call->init_req(TypeFunc::Parms+2, parm2);
aoqi@0:   if (parm3 != NULL)  call->init_req(TypeFunc::Parms+3, parm3);
aoqi@0: 
aoqi@0:   // Node *c = _gvn.transform(call);
aoqi@0:   call = (CallNode *) _gvn.transform(call);
aoqi@0:   Node *c = call; // dbx gets confused with call call->dump()
aoqi@0: 
aoqi@0:   // Slow leaf call has no side-effects, sets few values
aoqi@0: 
aoqi@0:   set_ctrl(transform( new (C) ProjNode(call,TypeFunc::Control) ));
aoqi@0: 
aoqi@0:   // Make memory for the call
aoqi@0:   Node* mem = _gvn.transform( new (C) ProjNode(call, TypeFunc::Memory) );
aoqi@0: 
aoqi@0:   // Set the RawPtr memory state only.
aoqi@0:   set_memory(mem, adr_idx);
aoqi@0: 
aoqi@0:   assert(C->alias_type(call->adr_type()) == C->alias_type(adr_type),
aoqi@0:          "call node must be constructed correctly");
aoqi@0: }