110 lines
3.2 KiB
C++
110 lines
3.2 KiB
C++
/*
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* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#include "precompiled.hpp"
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#include "opto/narrowptrnode.hpp"
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#include "opto/phaseX.hpp"
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Node* DecodeNNode::Identity(PhaseGVN* phase) {
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const Type *t = phase->type( in(1) );
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if( t == Type::TOP ) return in(1);
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if (in(1)->is_EncodeP()) {
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// (DecodeN (EncodeP p)) -> p
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return in(1)->in(1);
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}
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return this;
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}
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const Type* DecodeNNode::Value(PhaseGVN* phase) const {
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const Type *t = phase->type( in(1) );
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if (t == Type::TOP) return Type::TOP;
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if (t == TypeNarrowOop::NULL_PTR) return TypePtr::NULL_PTR;
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assert(t->isa_narrowoop(), "only narrowoop here");
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return t->make_ptr();
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}
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Node* EncodePNode::Identity(PhaseGVN* phase) {
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const Type *t = phase->type( in(1) );
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if( t == Type::TOP ) return in(1);
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if (in(1)->is_DecodeN()) {
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// (EncodeP (DecodeN p)) -> p
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return in(1)->in(1);
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}
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return this;
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}
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const Type* EncodePNode::Value(PhaseGVN* phase) const {
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const Type *t = phase->type( in(1) );
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if (t == Type::TOP) return Type::TOP;
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if (t == TypePtr::NULL_PTR) return TypeNarrowOop::NULL_PTR;
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assert(t->isa_oop_ptr(), "only oopptr here");
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return t->make_narrowoop();
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}
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Node* DecodeNKlassNode::Identity(PhaseGVN* phase) {
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const Type *t = phase->type( in(1) );
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if( t == Type::TOP ) return in(1);
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if (in(1)->is_EncodePKlass()) {
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// (DecodeNKlass (EncodePKlass p)) -> p
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return in(1)->in(1);
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}
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return this;
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}
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const Type* DecodeNKlassNode::Value(PhaseGVN* phase) const {
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const Type *t = phase->type( in(1) );
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if (t == Type::TOP) return Type::TOP;
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assert(t != TypeNarrowKlass::NULL_PTR, "null klass?");
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assert(t->isa_narrowklass(), "only narrow klass ptr here");
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return t->make_ptr();
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}
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Node* EncodePKlassNode::Identity(PhaseGVN* phase) {
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const Type *t = phase->type( in(1) );
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if( t == Type::TOP ) return in(1);
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if (in(1)->is_DecodeNKlass()) {
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// (EncodePKlass (DecodeNKlass p)) -> p
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return in(1)->in(1);
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}
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return this;
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}
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const Type* EncodePKlassNode::Value(PhaseGVN* phase) const {
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const Type *t = phase->type( in(1) );
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if (t == Type::TOP) return Type::TOP;
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assert (t != TypePtr::NULL_PTR, "null klass?");
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assert(UseCompressedClassPointers && t->isa_klassptr(), "only klass ptr here");
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return t->make_narrowklass();
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}
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