Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/opto/regalloc.hpp@95c00927be11 (annotated)

src/share/vm/opto/regalloc.hpp

Mon, 27 May 2013 12:56:34 +0200

author
stefank
date
Mon, 27 May 2013 12:56:34 +0200
changeset 5195
95c00927be11
parent 4949
8373c19be854
child 6198
55fb97c4c58d
permissions
-rw-r--r--

8015428: Remove unused CDS support from StringTable
Summary: The string in StringTable is not used by CDS anymore. Remove the unnecessary code in preparation for 8015422: Large performance hit when the StringTable is walked twice in Parallel Scavenge
Reviewed-by: pliden, tschatzl, coleenp

duke@435 1 /*
never@3138 2 * Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved.
duke@435 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435 4 *
duke@435 5 * This code is free software; you can redistribute it and/or modify it
duke@435 6 * under the terms of the GNU General Public License version 2 only, as
duke@435 7 * published by the Free Software Foundation.
duke@435 8 *
duke@435 9 * This code is distributed in the hope that it will be useful, but WITHOUT
duke@435 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@435 12 * version 2 for more details (a copy is included in the LICENSE file that
duke@435 13 * accompanied this code).
duke@435 14 *
duke@435 15 * You should have received a copy of the GNU General Public License version
duke@435 16 * 2 along with this work; if not, write to the Free Software Foundation,
duke@435 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435 18 *
trims@1907 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907 20 * or visit www.oracle.com if you need additional information or have any
trims@1907 21 * questions.
duke@435 22 *
duke@435 23 */
duke@435 24
stefank@2314 25 #ifndef SHARE_VM_OPTO_REGALLOC_HPP
stefank@2314 26 #define SHARE_VM_OPTO_REGALLOC_HPP
stefank@2314 27
stefank@2314 28 #include "code/vmreg.hpp"
stefank@2314 29 #include "opto/block.hpp"
stefank@2314 30 #include "opto/matcher.hpp"
stefank@2314 31 #include "opto/phase.hpp"
stefank@2314 32
duke@435 33 class Node;
duke@435 34 class Matcher;
duke@435 35 class PhaseCFG;
duke@435 36
duke@435 37 #define MAX_REG_ALLOCATORS 10
duke@435 38
duke@435 39 //------------------------------PhaseRegAlloc------------------------------------
duke@435 40 // Abstract register allocator
duke@435 41 class PhaseRegAlloc : public Phase {
never@3138 42 friend class VMStructs;
duke@435 43 static void (*_alloc_statistics[MAX_REG_ALLOCATORS])();
duke@435 44 static int _num_allocators;
duke@435 45
duke@435 46 protected:
duke@435 47 OptoRegPair *_node_regs;
duke@435 48 uint _node_regs_max_index;
duke@435 49 VectorSet _node_oops; // Mapping from node indices to oopiness
duke@435 50
duke@435 51 void alloc_node_regs(int size); // allocate _node_regs table with at least "size" elements
duke@435 52
duke@435 53 PhaseRegAlloc( uint unique, PhaseCFG &cfg, Matcher &matcher,
duke@435 54 void (*pr_stats)());
duke@435 55 public:
duke@435 56 PhaseCFG &_cfg; // Control flow graph
duke@435 57 uint _framesize; // Size of frame in stack-slots. not counting preserve area
duke@435 58 OptoReg::Name _max_reg; // Past largest register seen
duke@435 59 Matcher &_matcher; // Convert Ideal to MachNodes
duke@435 60 uint node_regs_max_index() const { return _node_regs_max_index; }
duke@435 61
duke@435 62 // Get the register associated with the Node
duke@435 63 OptoReg::Name get_reg_first( const Node *n ) const {
duke@435 64 debug_only( if( n->_idx >= _node_regs_max_index ) n->dump(); );
duke@435 65 assert( n->_idx < _node_regs_max_index, "Exceeded _node_regs array");
duke@435 66 return _node_regs[n->_idx].first();
duke@435 67 }
duke@435 68 OptoReg::Name get_reg_second( const Node *n ) const {
duke@435 69 debug_only( if( n->_idx >= _node_regs_max_index ) n->dump(); );
duke@435 70 assert( n->_idx < _node_regs_max_index, "Exceeded _node_regs array");
duke@435 71 return _node_regs[n->_idx].second();
duke@435 72 }
duke@435 73
duke@435 74 // Do all the real work of allocate
duke@435 75 virtual void Register_Allocate() = 0;
duke@435 76
duke@435 77
duke@435 78 // notify the register allocator that "node" is a new reference
duke@435 79 // to the value produced by "old_node"
duke@435 80 virtual void add_reference( const Node *node, const Node *old_node) = 0;
duke@435 81
duke@435 82
duke@435 83 // Set the register associated with a new Node
duke@435 84 void set_bad( uint idx ) {
duke@435 85 assert( idx < _node_regs_max_index, "Exceeded _node_regs array");
duke@435 86 _node_regs[idx].set_bad();
duke@435 87 }
duke@435 88 void set1( uint idx, OptoReg::Name reg ) {
duke@435 89 assert( idx < _node_regs_max_index, "Exceeded _node_regs array");
duke@435 90 _node_regs[idx].set1(reg);
duke@435 91 }
duke@435 92 void set2( uint idx, OptoReg::Name reg ) {
duke@435 93 assert( idx < _node_regs_max_index, "Exceeded _node_regs array");
duke@435 94 _node_regs[idx].set2(reg);
duke@435 95 }
duke@435 96 void set_pair( uint idx, OptoReg::Name hi, OptoReg::Name lo ) {
duke@435 97 assert( idx < _node_regs_max_index, "Exceeded _node_regs array");
duke@435 98 _node_regs[idx].set_pair(hi, lo);
duke@435 99 }
duke@435 100 void set_ptr( uint idx, OptoReg::Name reg ) {
duke@435 101 assert( idx < _node_regs_max_index, "Exceeded _node_regs array");
duke@435 102 _node_regs[idx].set_ptr(reg);
duke@435 103 }
duke@435 104 // Set and query if a node produces an oop
duke@435 105 void set_oop( const Node *n, bool );
duke@435 106 bool is_oop( const Node *n ) const;
duke@435 107
duke@435 108 // Convert a register number to a stack offset
duke@435 109 int reg2offset ( OptoReg::Name reg ) const;
duke@435 110 int reg2offset_unchecked( OptoReg::Name reg ) const;
duke@435 111
duke@435 112 // Convert a stack offset to a register number
duke@435 113 OptoReg::Name offset2reg( int stk_offset ) const;
duke@435 114
duke@435 115 // Get the register encoding associated with the Node
neliasso@4949 116 int get_encode(const Node *n) const {
duke@435 117 assert( n->_idx < _node_regs_max_index, "Exceeded _node_regs array");
duke@435 118 OptoReg::Name first = _node_regs[n->_idx].first();
duke@435 119 OptoReg::Name second = _node_regs[n->_idx].second();
duke@435 120 assert( !OptoReg::is_valid(second) || second == first+1, "" );
duke@435 121 assert(OptoReg::is_reg(first), "out of range");
duke@435 122 return Matcher::_regEncode[first];
duke@435 123 }
duke@435 124
duke@435 125 #ifndef PRODUCT
duke@435 126 static int _total_framesize;
duke@435 127 static int _max_framesize;
duke@435 128
duke@435 129 virtual void dump_frame() const = 0;
duke@435 130 virtual char *dump_register( const Node *n, char *buf ) const = 0;
duke@435 131 static void print_statistics();
duke@435 132 #endif
duke@435 133 };
stefank@2314 134
stefank@2314 135 #endif // SHARE_VM_OPTO_REGALLOC_HPP

Mercurial Repository: jdk8-mips64-public/hotspot

mercurial