Mercurial > hg > graal-compiler
annotate src/share/vm/opto/output.hpp @ 1585:49fac4acd688
6958485: fix for 6879921 was insufficient
Reviewed-by: kvn
author | never |
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date | Mon, 07 Jun 2010 14:17:01 -0700 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2000, 2005, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
25 class Arena; | |
26 class Bundle; | |
27 class Block; | |
28 class Block_Array; | |
29 class Node; | |
30 class Node_Array; | |
31 class Node_List; | |
32 class PhaseCFG; | |
33 class PhaseChaitin; | |
34 class Pipeline_Use_Element; | |
35 class Pipeline_Use; | |
36 | |
37 #ifndef PRODUCT | |
38 #define DEBUG_ARG(x) , x | |
39 #else | |
40 #define DEBUG_ARG(x) | |
41 #endif | |
42 | |
43 // Define the initial sizes for allocation of the resizable code buffer | |
44 enum { | |
45 initial_code_capacity = 16 * 1024, | |
46 initial_stub_capacity = 4 * 1024, | |
47 initial_const_capacity = 4 * 1024, | |
48 initial_locs_capacity = 3 * 1024 | |
49 }; | |
50 | |
51 //------------------------------Scheduling---------------------------------- | |
52 // This class contains all the information necessary to implement instruction | |
53 // scheduling and bundling. | |
54 class Scheduling { | |
55 | |
56 private: | |
57 // Arena to use | |
58 Arena *_arena; | |
59 | |
60 // Control-Flow Graph info | |
61 PhaseCFG *_cfg; | |
62 | |
63 // Register Allocation info | |
64 PhaseRegAlloc *_regalloc; | |
65 | |
66 // Number of nodes in the method | |
67 uint _node_bundling_limit; | |
68 | |
69 // List of scheduled nodes. Generated in reverse order | |
70 Node_List _scheduled; | |
71 | |
72 // List of nodes currently available for choosing for scheduling | |
73 Node_List _available; | |
74 | |
75 // Mapping from node (index) to basic block | |
76 Block_Array& _bbs; | |
77 | |
78 // For each instruction beginning a bundle, the number of following | |
79 // nodes to be bundled with it. | |
80 Bundle *_node_bundling_base; | |
81 | |
82 // Mapping from register to Node | |
83 Node_List _reg_node; | |
84 | |
85 // Free list for pinch nodes. | |
86 Node_List _pinch_free_list; | |
87 | |
88 // Latency from the beginning of the containing basic block (base 1) | |
89 // for each node. | |
90 unsigned short *_node_latency; | |
91 | |
92 // Number of uses of this node within the containing basic block. | |
93 short *_uses; | |
94 | |
95 // Schedulable portion of current block. Skips Region/Phi/CreateEx up | |
96 // front, branch+proj at end. Also skips Catch/CProj (same as | |
97 // branch-at-end), plus just-prior exception-throwing call. | |
98 uint _bb_start, _bb_end; | |
99 | |
100 // Latency from the end of the basic block as scheduled | |
101 unsigned short *_current_latency; | |
102 | |
103 // Remember the next node | |
104 Node *_next_node; | |
105 | |
106 // Use this for an unconditional branch delay slot | |
107 Node *_unconditional_delay_slot; | |
108 | |
109 // Pointer to a Nop | |
110 MachNopNode *_nop; | |
111 | |
112 // Length of the current bundle, in instructions | |
113 uint _bundle_instr_count; | |
114 | |
115 // Current Cycle number, for computing latencies and bundling | |
116 uint _bundle_cycle_number; | |
117 | |
118 // Bundle information | |
119 Pipeline_Use_Element _bundle_use_elements[resource_count]; | |
120 Pipeline_Use _bundle_use; | |
121 | |
122 // Dump the available list | |
123 void dump_available() const; | |
124 | |
125 public: | |
126 Scheduling(Arena *arena, Compile &compile); | |
127 | |
128 // Destructor | |
129 NOT_PRODUCT( ~Scheduling(); ) | |
130 | |
131 // Step ahead "i" cycles | |
132 void step(uint i); | |
133 | |
134 // Step ahead 1 cycle, and clear the bundle state (for example, | |
135 // at a branch target) | |
136 void step_and_clear(); | |
137 | |
138 Bundle* node_bundling(const Node *n) { | |
139 assert(valid_bundle_info(n), "oob"); | |
140 return (&_node_bundling_base[n->_idx]); | |
141 } | |
142 | |
143 bool valid_bundle_info(const Node *n) const { | |
144 return (_node_bundling_limit > n->_idx); | |
145 } | |
146 | |
147 bool starts_bundle(const Node *n) const { | |
148 return (_node_bundling_limit > n->_idx && _node_bundling_base[n->_idx].starts_bundle()); | |
149 } | |
150 | |
151 // Do the scheduling | |
152 void DoScheduling(); | |
153 | |
154 // Compute the local latencies walking forward over the list of | |
155 // nodes for a basic block | |
156 void ComputeLocalLatenciesForward(const Block *bb); | |
157 | |
158 // Compute the register antidependencies within a basic block | |
159 void ComputeRegisterAntidependencies(Block *bb); | |
160 void verify_do_def( Node *n, OptoReg::Name def, const char *msg ); | |
161 void verify_good_schedule( Block *b, const char *msg ); | |
162 void anti_do_def( Block *b, Node *def, OptoReg::Name def_reg, int is_def ); | |
163 void anti_do_use( Block *b, Node *use, OptoReg::Name use_reg ); | |
164 | |
165 // Add a node to the current bundle | |
166 void AddNodeToBundle(Node *n, const Block *bb); | |
167 | |
168 // Add a node to the list of available nodes | |
169 void AddNodeToAvailableList(Node *n); | |
170 | |
171 // Compute the local use count for the nodes in a block, and compute | |
172 // the list of instructions with no uses in the block as available | |
173 void ComputeUseCount(const Block *bb); | |
174 | |
175 // Choose an instruction from the available list to add to the bundle | |
176 Node * ChooseNodeToBundle(); | |
177 | |
178 // See if this Node fits into the currently accumulating bundle | |
179 bool NodeFitsInBundle(Node *n); | |
180 | |
181 // Decrement the use count for a node | |
182 void DecrementUseCounts(Node *n, const Block *bb); | |
183 | |
184 // Garbage collect pinch nodes for reuse by other blocks. | |
185 void garbage_collect_pinch_nodes(); | |
186 // Clean up a pinch node for reuse (helper for above). | |
187 void cleanup_pinch( Node *pinch ); | |
188 | |
189 // Information for statistics gathering | |
190 #ifndef PRODUCT | |
191 private: | |
192 // Gather information on size of nops relative to total | |
193 uint _branches, _unconditional_delays; | |
194 | |
195 static uint _total_nop_size, _total_method_size; | |
196 static uint _total_branches, _total_unconditional_delays; | |
197 static uint _total_instructions_per_bundle[Pipeline::_max_instrs_per_cycle+1]; | |
198 | |
199 public: | |
200 static void print_statistics(); | |
201 | |
202 static void increment_instructions_per_bundle(uint i) { | |
203 _total_instructions_per_bundle[i]++; | |
204 } | |
205 | |
206 static void increment_nop_size(uint s) { | |
207 _total_nop_size += s; | |
208 } | |
209 | |
210 static void increment_method_size(uint s) { | |
211 _total_method_size += s; | |
212 } | |
213 #endif | |
214 | |
215 }; |