840867efa6
Add a default construction to VectorSet and clean up uses of the old constructor. Reviewed-by: kvn, thartmann
132 lines
4.8 KiB
C++
132 lines
4.8 KiB
C++
/*
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* Copyright (c) 2000, 2013, 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/regalloc.hpp"
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static const int NodeRegsOverflowSize = 200;
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void (*PhaseRegAlloc::_alloc_statistics[MAX_REG_ALLOCATORS])();
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int PhaseRegAlloc::_num_allocators = 0;
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#ifndef PRODUCT
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int PhaseRegAlloc::_total_framesize = 0;
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int PhaseRegAlloc::_max_framesize = 0;
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#endif
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PhaseRegAlloc::PhaseRegAlloc( uint unique, PhaseCFG &cfg,
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Matcher &matcher,
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void (*pr_stats)() ):
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Phase(Register_Allocation),
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_node_regs(0),
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_node_regs_max_index(0),
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_cfg(cfg),
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_framesize(0xdeadbeef),
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_matcher(matcher)
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{
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int i;
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for (i=0; i < _num_allocators; i++) {
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if (_alloc_statistics[i] == pr_stats)
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return;
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}
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assert((_num_allocators + 1) < MAX_REG_ALLOCATORS, "too many register allocators");
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_alloc_statistics[_num_allocators++] = pr_stats;
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}
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//------------------------------reg2offset-------------------------------------
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int PhaseRegAlloc::reg2offset_unchecked( OptoReg::Name reg ) const {
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// Slots below _max_in_arg_stack_reg are offset by the entire frame.
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// Slots above _max_in_arg_stack_reg are frame_slots and are not offset.
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int slot = (reg < _matcher._new_SP)
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? reg - OptoReg::stack0() + _framesize
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: reg - _matcher._new_SP;
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// Note: We use the direct formula (reg - SharedInfo::stack0) instead of
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// OptoReg::reg2stack(reg), in order to avoid asserts in the latter
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// function. This routine must remain unchecked, so that dump_frame()
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// can do its work undisturbed.
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// %%% not really clear why reg2stack would assert here
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return slot*VMRegImpl::stack_slot_size;
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}
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int PhaseRegAlloc::reg2offset( OptoReg::Name reg ) const {
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// Not allowed in the out-preserve area.
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// In-preserve area is allowed so Intel can fetch the return pc out.
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assert( reg < _matcher._old_SP ||
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(reg >= OptoReg::add(_matcher._old_SP,C->out_preserve_stack_slots()) &&
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reg < _matcher._in_arg_limit) ||
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reg >= OptoReg::add(_matcher._new_SP, C->out_preserve_stack_slots()) ||
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// Allow return_addr in the out-preserve area.
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reg == _matcher.return_addr(),
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"register allocated in a preserve area" );
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return reg2offset_unchecked( reg );
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}
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//------------------------------offset2reg-------------------------------------
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OptoReg::Name PhaseRegAlloc::offset2reg(int stk_offset) const {
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int slot = stk_offset / jintSize;
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int reg = (slot < (int) _framesize)
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? slot + _matcher._new_SP
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: OptoReg::stack2reg(slot) - _framesize;
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assert(stk_offset == reg2offset((OptoReg::Name) reg),
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"offset2reg does not invert properly");
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return (OptoReg::Name) reg;
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}
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//------------------------------set_oop----------------------------------------
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void PhaseRegAlloc::set_oop( const Node *n, bool is_an_oop ) {
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if( is_an_oop ) {
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_node_oops.set(n->_idx);
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}
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}
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//------------------------------is_oop-----------------------------------------
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bool PhaseRegAlloc::is_oop( const Node *n ) const {
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return _node_oops.test(n->_idx) != 0;
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}
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// Allocate _node_regs table with at least "size" elements
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void PhaseRegAlloc::alloc_node_regs(int size) {
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_node_regs_max_index = size + (size >> 1) + NodeRegsOverflowSize;
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_node_regs = NEW_RESOURCE_ARRAY( OptoRegPair, _node_regs_max_index );
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// We assume our caller will fill in all elements up to size-1, so
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// only the extra space we allocate is initialized here.
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for( uint i = size; i < _node_regs_max_index; ++i )
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_node_regs[i].set_bad();
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}
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#ifndef PRODUCT
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void
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PhaseRegAlloc::print_statistics() {
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tty->print_cr("Total frameslots = %d, Max frameslots = %d", _total_framesize, _max_framesize);
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int i;
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for (i=0; i < _num_allocators; i++) {
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_alloc_statistics[i]();
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}
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}
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#endif
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