Mercurial > hg > truffle
view src/share/vm/opto/rootnode.hpp @ 641:6af0a709d52b
6812587: Use auxv to determine SPARC hardware features on Solaris
Summary: A similar function to getisax(2) should be used to determine all possible instruction set extensions.
Reviewed-by: never, kvn
author | twisti |
---|---|
date | Wed, 11 Mar 2009 14:16:13 -0700 |
parents | a61af66fc99e |
children | c18cbe5936b8 |
line wrap: on
line source
/* * Copyright 1997-2005 Sun Microsystems, Inc. All Rights Reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or * have any questions. * */ //------------------------------RootNode--------------------------------------- // The one-and-only before-all-else and after-all-else RootNode. The RootNode // represents what happens if the user runs the whole program repeatedly. The // RootNode produces the initial values of I/O and memory for the program or // procedure start. class RootNode : public LoopNode { public: RootNode( ) : LoopNode(0,0) { init_class_id(Class_Root); del_req(2); del_req(1); } virtual int Opcode() const; virtual const Node *is_block_proj() const { return this; } virtual const Type *bottom_type() const { return Type::BOTTOM; } virtual Node *Identity( PhaseTransform *phase ) { return this; } virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); virtual const Type *Value( PhaseTransform *phase ) const { return Type::BOTTOM; } }; //------------------------------HaltNode--------------------------------------- // Throw an exception & die class HaltNode : public Node { public: HaltNode( Node *ctrl, Node *frameptr ); virtual int Opcode() const; virtual bool pinned() const { return true; }; virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); virtual const Type *Value( PhaseTransform *phase ) const; virtual const Type *bottom_type() const; virtual bool is_CFG() const { return true; } virtual uint hash() const { return NO_HASH; } // CFG nodes do not hash virtual bool depends_only_on_test() const { return false; } virtual const Node *is_block_proj() const { return this; } virtual const RegMask &out_RegMask() const; virtual uint ideal_reg() const { return NotAMachineReg; } virtual uint match_edge(uint idx) const { return 0; } };