Mercurial > hg > graal-compiler
view src/share/vm/runtime/stackValue.hpp @ 974:26b774d693aa
Merge
author | acorn |
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date | Wed, 16 Sep 2009 09:10:57 -0400 |
parents | bd02caa94611 |
children | c18cbe5936b8 |
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/* * Copyright 1997-2009 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. * */ class StackValue : public ResourceObj { private: BasicType _type; intptr_t _i; // Blank java stack slot value Handle _o; // Java stack slot value interpreted as a Handle public: StackValue(intptr_t value) { _type = T_INT; _i = value; } StackValue(Handle value, intptr_t scalar_replaced = 0) { _type = T_OBJECT; _i = scalar_replaced; _o = value; assert(_i == 0 || _o.is_null(), "not null object should not be marked as scalar replaced"); } StackValue() { _type = T_CONFLICT; _i = 0; } // Only used during deopt- preserve object type. StackValue(intptr_t o, BasicType t) { assert(t == T_OBJECT, "should not be used"); _type = t; _i = o; } Handle get_obj() const { assert(type() == T_OBJECT, "type check"); return _o; } bool obj_is_scalar_replaced() const { assert(type() == T_OBJECT, "type check"); return _i != 0; } void set_obj(Handle value) { assert(type() == T_OBJECT, "type check"); _o = value; } intptr_t get_int() const { assert(type() == T_INT, "type check"); return _i; } // For special case in deopt. intptr_t get_int(BasicType t) const { assert(t == T_OBJECT && type() == T_OBJECT, "type check"); return _i; } void set_int(intptr_t value) { assert(type() == T_INT, "type check"); _i = value; } BasicType type() const { return _type; } bool equal(StackValue *value) { if (_type != value->_type) return false; if (_type == T_OBJECT) return (_o == value->_o); else { assert(_type == T_INT, "sanity check"); // [phh] compare only low addressed portions of intptr_t slots return (*(int *)&_i == *(int *)&value->_i); } } static StackValue* create_stack_value(const frame* fr, const RegisterMap* reg_map, ScopeValue* sv); static BasicLock* resolve_monitor_lock(const frame* fr, Location location); #ifndef PRODUCT public: // Printing void print_on(outputStream* st) const; #endif };