1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/opto/multnode.hpp Wed Apr 27 01:25:04 2016 +0800
1.3 @@ -0,0 +1,101 @@
1.4 +/*
1.5 + * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#ifndef SHARE_VM_OPTO_MULTNODE_HPP
1.29 +#define SHARE_VM_OPTO_MULTNODE_HPP
1.30 +
1.31 +#include "opto/node.hpp"
1.32 +
1.33 +class Matcher;
1.34 +class ProjNode;
1.35 +
1.36 +//------------------------------MultiNode--------------------------------------
1.37 +// This class defines a MultiNode, a Node which produces many values. The
1.38 +// values are wrapped up in a tuple Type, i.e. a TypeTuple.
1.39 +class MultiNode : public Node {
1.40 +public:
1.41 + MultiNode( uint required ) : Node(required) {
1.42 + init_class_id(Class_Multi);
1.43 + }
1.44 + virtual int Opcode() const;
1.45 + virtual const Type *bottom_type() const = 0;
1.46 + virtual bool is_CFG() const { return true; }
1.47 + virtual uint hash() const { return NO_HASH; } // CFG nodes do not hash
1.48 + virtual bool depends_only_on_test() const { return false; }
1.49 + virtual const RegMask &out_RegMask() const;
1.50 + virtual Node *match( const ProjNode *proj, const Matcher *m );
1.51 + virtual uint ideal_reg() const { return NotAMachineReg; }
1.52 + ProjNode* proj_out(uint which_proj) const; // Get a named projection
1.53 +
1.54 +};
1.55 +
1.56 +//------------------------------ProjNode---------------------------------------
1.57 +// This class defines a Projection node. Projections project a single element
1.58 +// out of a tuple (or Signature) type. Only MultiNodes produce TypeTuple
1.59 +// results.
1.60 +class ProjNode : public Node {
1.61 +protected:
1.62 + virtual uint hash() const;
1.63 + virtual uint cmp( const Node &n ) const;
1.64 + virtual uint size_of() const;
1.65 + void check_con() const; // Called from constructor.
1.66 + const Type* proj_type(const Type* t) const;
1.67 +
1.68 +public:
1.69 + ProjNode( Node *src, uint con, bool io_use = false )
1.70 + : Node( src ), _con(con), _is_io_use(io_use)
1.71 + {
1.72 + init_class_id(Class_Proj);
1.73 + // Optimistic setting. Need additional checks in Node::is_dead_loop_safe().
1.74 + if (con != TypeFunc::Memory || src->is_Start())
1.75 + init_flags(Flag_is_dead_loop_safe);
1.76 + debug_only(check_con());
1.77 + }
1.78 + const uint _con; // The field in the tuple we are projecting
1.79 + const bool _is_io_use; // Used to distinguish between the projections
1.80 + // used on the control and io paths from a macro node
1.81 + virtual int Opcode() const;
1.82 + virtual bool is_CFG() const;
1.83 + virtual bool depends_only_on_test() const { return false; }
1.84 + virtual const Type *bottom_type() const;
1.85 + virtual const TypePtr *adr_type() const;
1.86 + virtual bool pinned() const;
1.87 + virtual const Type *Value( PhaseTransform *phase ) const;
1.88 + virtual uint ideal_reg() const;
1.89 + virtual const RegMask &out_RegMask() const;
1.90 +
1.91 +#ifndef PRODUCT
1.92 + virtual void dump_spec(outputStream *st) const;
1.93 +#endif
1.94 +
1.95 + // Return true if proj is for "proj->[region->..]call_uct"
1.96 + bool is_uncommon_trap_proj(Deoptimization::DeoptReason reason);
1.97 + // Return true for "if(test)-> proj -> ...
1.98 + // |
1.99 + // V
1.100 + // other_proj->[region->..]call_uct"
1.101 + bool is_uncommon_trap_if_pattern(Deoptimization::DeoptReason reason);
1.102 +};
1.103 +
1.104 +#endif // SHARE_VM_OPTO_MULTNODE_HPP
