Mercurial > hg > truffle
annotate src/share/vm/opto/superword.cpp @ 14247:2e96b2d61686
8031530: [TESTBUG] Enable test runtime/LoadClass/LoadClassNegative.java
Summary: Re-enabled the test. The issue that prevents this test from running was fixed by 8020675
Reviewed-by: sla, ccheung
author | zgu |
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date | Mon, 13 Jan 2014 10:05:37 -0500 |
parents | de6a9e811145 |
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rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2007, 2013, 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 |
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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 | |
1972 | 24 #include "precompiled.hpp" |
25 #include "compiler/compileLog.hpp" | |
26 #include "libadt/vectset.hpp" | |
27 #include "memory/allocation.inline.hpp" | |
28 #include "opto/addnode.hpp" | |
29 #include "opto/callnode.hpp" | |
30 #include "opto/divnode.hpp" | |
31 #include "opto/matcher.hpp" | |
32 #include "opto/memnode.hpp" | |
33 #include "opto/mulnode.hpp" | |
34 #include "opto/opcodes.hpp" | |
35 #include "opto/superword.hpp" | |
36 #include "opto/vectornode.hpp" | |
0 | 37 |
38 // | |
39 // S U P E R W O R D T R A N S F O R M | |
40 //============================================================================= | |
41 | |
42 //------------------------------SuperWord--------------------------- | |
43 SuperWord::SuperWord(PhaseIdealLoop* phase) : | |
44 _phase(phase), | |
45 _igvn(phase->_igvn), | |
46 _arena(phase->C->comp_arena()), | |
47 _packset(arena(), 8, 0, NULL), // packs for the current block | |
48 _bb_idx(arena(), (int)(1.10 * phase->C->unique()), 0, 0), // node idx to index in bb | |
49 _block(arena(), 8, 0, NULL), // nodes in current block | |
50 _data_entry(arena(), 8, 0, NULL), // nodes with all inputs from outside | |
51 _mem_slice_head(arena(), 8, 0, NULL), // memory slice heads | |
52 _mem_slice_tail(arena(), 8, 0, NULL), // memory slice tails | |
53 _node_info(arena(), 8, 0, SWNodeInfo::initial), // info needed per node | |
54 _align_to_ref(NULL), // memory reference to align vectors to | |
55 _disjoint_ptrs(arena(), 8, 0, OrderedPair::initial), // runtime disambiguated pointer pairs | |
56 _dg(_arena), // dependence graph | |
57 _visited(arena()), // visited node set | |
58 _post_visited(arena()), // post visited node set | |
59 _n_idx_list(arena(), 8), // scratch list of (node,index) pairs | |
60 _stk(arena(), 8, 0, NULL), // scratch stack of nodes | |
61 _nlist(arena(), 8, 0, NULL), // scratch list of nodes | |
62 _lpt(NULL), // loop tree node | |
63 _lp(NULL), // LoopNode | |
64 _bb(NULL), // basic block | |
65 _iv(NULL) // induction var | |
66 {} | |
67 | |
68 //------------------------------transform_loop--------------------------- | |
69 void SuperWord::transform_loop(IdealLoopTree* lpt) { | |
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70 assert(UseSuperWord, "should be"); |
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71 // Do vectors exist on this architecture? |
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72 if (Matcher::vector_width_in_bytes(T_BYTE) < 2) return; |
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73 |
0 | 74 assert(lpt->_head->is_CountedLoop(), "must be"); |
75 CountedLoopNode *cl = lpt->_head->as_CountedLoop(); | |
76 | |
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77 if (!cl->is_valid_counted_loop()) return; // skip malformed counted loop |
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78 |
0 | 79 if (!cl->is_main_loop() ) return; // skip normal, pre, and post loops |
80 | |
81 // Check for no control flow in body (other than exit) | |
82 Node *cl_exit = cl->loopexit(); | |
83 if (cl_exit->in(0) != lpt->_head) return; | |
84 | |
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85 // Make sure the are no extra control users of the loop backedge |
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86 if (cl->back_control()->outcnt() != 1) { |
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87 return; |
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88 } |
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89 |
0 | 90 // Check for pre-loop ending with CountedLoopEnd(Bool(Cmp(x,Opaque1(limit)))) |
91 CountedLoopEndNode* pre_end = get_pre_loop_end(cl); | |
92 if (pre_end == NULL) return; | |
93 Node *pre_opaq1 = pre_end->limit(); | |
94 if (pre_opaq1->Opcode() != Op_Opaque1) return; | |
95 | |
96 init(); // initialize data structures | |
97 | |
98 set_lpt(lpt); | |
99 set_lp(cl); | |
100 | |
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101 // For now, define one block which is the entire loop body |
0 | 102 set_bb(cl); |
103 | |
104 assert(_packset.length() == 0, "packset must be empty"); | |
105 SLP_extract(); | |
106 } | |
107 | |
108 //------------------------------SLP_extract--------------------------- | |
109 // Extract the superword level parallelism | |
110 // | |
111 // 1) A reverse post-order of nodes in the block is constructed. By scanning | |
112 // this list from first to last, all definitions are visited before their uses. | |
113 // | |
114 // 2) A point-to-point dependence graph is constructed between memory references. | |
115 // This simplies the upcoming "independence" checker. | |
116 // | |
117 // 3) The maximum depth in the node graph from the beginning of the block | |
118 // to each node is computed. This is used to prune the graph search | |
119 // in the independence checker. | |
120 // | |
121 // 4) For integer types, the necessary bit width is propagated backwards | |
122 // from stores to allow packed operations on byte, char, and short | |
123 // integers. This reverses the promotion to type "int" that javac | |
124 // did for operations like: char c1,c2,c3; c1 = c2 + c3. | |
125 // | |
126 // 5) One of the memory references is picked to be an aligned vector reference. | |
127 // The pre-loop trip count is adjusted to align this reference in the | |
128 // unrolled body. | |
129 // | |
130 // 6) The initial set of pack pairs is seeded with memory references. | |
131 // | |
132 // 7) The set of pack pairs is extended by following use->def and def->use links. | |
133 // | |
134 // 8) The pairs are combined into vector sized packs. | |
135 // | |
136 // 9) Reorder the memory slices to co-locate members of the memory packs. | |
137 // | |
138 // 10) Generate ideal vector nodes for the final set of packs and where necessary, | |
139 // inserting scalar promotion, vector creation from multiple scalars, and | |
140 // extraction of scalar values from vectors. | |
141 // | |
142 void SuperWord::SLP_extract() { | |
143 | |
144 // Ready the block | |
145 | |
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146 if (!construct_bb()) |
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147 return; // Exit if no interesting nodes or complex graph. |
0 | 148 |
149 dependence_graph(); | |
150 | |
151 compute_max_depth(); | |
152 | |
153 compute_vector_element_type(); | |
154 | |
155 // Attempt vectorization | |
156 | |
157 find_adjacent_refs(); | |
158 | |
159 extend_packlist(); | |
160 | |
161 combine_packs(); | |
162 | |
163 construct_my_pack_map(); | |
164 | |
165 filter_packs(); | |
166 | |
167 schedule(); | |
168 | |
169 output(); | |
170 } | |
171 | |
172 //------------------------------find_adjacent_refs--------------------------- | |
173 // Find the adjacent memory references and create pack pairs for them. | |
174 // This is the initial set of packs that will then be extended by | |
175 // following use->def and def->use links. The align positions are | |
176 // assigned relative to the reference "align_to_ref" | |
177 void SuperWord::find_adjacent_refs() { | |
178 // Get list of memory operations | |
179 Node_List memops; | |
180 for (int i = 0; i < _block.length(); i++) { | |
181 Node* n = _block.at(i); | |
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182 if (n->is_Mem() && !n->is_LoadStore() && in_bb(n) && |
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183 is_java_primitive(n->as_Mem()->memory_type())) { |
0 | 184 int align = memory_alignment(n->as_Mem(), 0); |
185 if (align != bottom_align) { | |
186 memops.push(n); | |
187 } | |
188 } | |
189 } | |
190 | |
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191 Node_List align_to_refs; |
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192 int best_iv_adjustment = 0; |
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193 MemNode* best_align_to_mem_ref = NULL; |
0 | 194 |
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195 while (memops.size() != 0) { |
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196 // Find a memory reference to align to. |
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197 MemNode* mem_ref = find_align_to_ref(memops); |
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198 if (mem_ref == NULL) break; |
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199 align_to_refs.push(mem_ref); |
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200 int iv_adjustment = get_iv_adjustment(mem_ref); |
0 | 201 |
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202 if (best_align_to_mem_ref == NULL) { |
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203 // Set memory reference which is the best from all memory operations |
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204 // to be used for alignment. The pre-loop trip count is modified to align |
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205 // this reference to a vector-aligned address. |
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206 best_align_to_mem_ref = mem_ref; |
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207 best_iv_adjustment = iv_adjustment; |
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208 } |
0 | 209 |
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210 SWPointer align_to_ref_p(mem_ref, this); |
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211 // Set alignment relative to "align_to_ref" for all related memory operations. |
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212 for (int i = memops.size() - 1; i >= 0; i--) { |
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213 MemNode* s = memops.at(i)->as_Mem(); |
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214 if (isomorphic(s, mem_ref)) { |
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215 SWPointer p2(s, this); |
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216 if (p2.comparable(align_to_ref_p)) { |
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217 int align = memory_alignment(s, iv_adjustment); |
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218 set_alignment(s, align); |
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219 } |
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220 } |
0 | 221 } |
222 | |
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223 // Create initial pack pairs of memory operations for which |
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224 // alignment is set and vectors will be aligned. |
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225 bool create_pack = true; |
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226 if (memory_alignment(mem_ref, best_iv_adjustment) == 0) { |
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227 if (!Matcher::misaligned_vectors_ok()) { |
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228 int vw = vector_width(mem_ref); |
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229 int vw_best = vector_width(best_align_to_mem_ref); |
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230 if (vw > vw_best) { |
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231 // Do not vectorize a memory access with more elements per vector |
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232 // if unaligned memory access is not allowed because number of |
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233 // iterations in pre-loop will be not enough to align it. |
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234 create_pack = false; |
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235 } |
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236 } |
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237 } else { |
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238 if (same_velt_type(mem_ref, best_align_to_mem_ref)) { |
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239 // Can't allow vectorization of unaligned memory accesses with the |
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240 // same type since it could be overlapped accesses to the same array. |
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241 create_pack = false; |
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242 } else { |
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243 // Allow independent (different type) unaligned memory operations |
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244 // if HW supports them. |
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245 if (!Matcher::misaligned_vectors_ok()) { |
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246 create_pack = false; |
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247 } else { |
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248 // Check if packs of the same memory type but |
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249 // with a different alignment were created before. |
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250 for (uint i = 0; i < align_to_refs.size(); i++) { |
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251 MemNode* mr = align_to_refs.at(i)->as_Mem(); |
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252 if (same_velt_type(mr, mem_ref) && |
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253 memory_alignment(mr, iv_adjustment) != 0) |
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254 create_pack = false; |
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255 } |
0 | 256 } |
257 } | |
258 } | |
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259 if (create_pack) { |
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260 for (uint i = 0; i < memops.size(); i++) { |
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261 Node* s1 = memops.at(i); |
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262 int align = alignment(s1); |
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263 if (align == top_align) continue; |
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264 for (uint j = 0; j < memops.size(); j++) { |
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265 Node* s2 = memops.at(j); |
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266 if (alignment(s2) == top_align) continue; |
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267 if (s1 != s2 && are_adjacent_refs(s1, s2)) { |
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268 if (stmts_can_pack(s1, s2, align)) { |
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269 Node_List* pair = new Node_List(); |
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270 pair->push(s1); |
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271 pair->push(s2); |
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272 _packset.append(pair); |
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273 } |
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274 } |
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275 } |
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276 } |
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277 } else { // Don't create unaligned pack |
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278 // First, remove remaining memory ops of the same type from the list. |
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279 for (int i = memops.size() - 1; i >= 0; i--) { |
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280 MemNode* s = memops.at(i)->as_Mem(); |
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281 if (same_velt_type(s, mem_ref)) { |
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282 memops.remove(i); |
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283 } |
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284 } |
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285 |
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286 // Second, remove already constructed packs of the same type. |
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287 for (int i = _packset.length() - 1; i >= 0; i--) { |
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288 Node_List* p = _packset.at(i); |
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289 MemNode* s = p->at(0)->as_Mem(); |
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290 if (same_velt_type(s, mem_ref)) { |
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291 remove_pack_at(i); |
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292 } |
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293 } |
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294 |
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295 // If needed find the best memory reference for loop alignment again. |
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296 if (same_velt_type(mem_ref, best_align_to_mem_ref)) { |
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297 // Put memory ops from remaining packs back on memops list for |
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298 // the best alignment search. |
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299 uint orig_msize = memops.size(); |
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300 for (int i = 0; i < _packset.length(); i++) { |
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301 Node_List* p = _packset.at(i); |
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302 MemNode* s = p->at(0)->as_Mem(); |
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303 assert(!same_velt_type(s, mem_ref), "sanity"); |
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304 memops.push(s); |
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305 } |
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306 MemNode* best_align_to_mem_ref = find_align_to_ref(memops); |
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307 if (best_align_to_mem_ref == NULL) break; |
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308 best_iv_adjustment = get_iv_adjustment(best_align_to_mem_ref); |
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309 // Restore list. |
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310 while (memops.size() > orig_msize) |
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311 (void)memops.pop(); |
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312 } |
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313 } // unaligned memory accesses |
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314 |
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315 // Remove used mem nodes. |
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316 for (int i = memops.size() - 1; i >= 0; i--) { |
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317 MemNode* m = memops.at(i)->as_Mem(); |
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318 if (alignment(m) != top_align) { |
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319 memops.remove(i); |
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320 } |
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321 } |
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322 |
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323 } // while (memops.size() != 0 |
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324 set_align_to_ref(best_align_to_mem_ref); |
0 | 325 |
326 #ifndef PRODUCT | |
327 if (TraceSuperWord) { | |
328 tty->print_cr("\nAfter find_adjacent_refs"); | |
329 print_packset(); | |
330 } | |
331 #endif | |
332 } | |
333 | |
334 //------------------------------find_align_to_ref--------------------------- | |
335 // Find a memory reference to align the loop induction variable to. | |
336 // Looks first at stores then at loads, looking for a memory reference | |
337 // with the largest number of references similar to it. | |
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338 MemNode* SuperWord::find_align_to_ref(Node_List &memops) { |
0 | 339 GrowableArray<int> cmp_ct(arena(), memops.size(), memops.size(), 0); |
340 | |
341 // Count number of comparable memory ops | |
342 for (uint i = 0; i < memops.size(); i++) { | |
343 MemNode* s1 = memops.at(i)->as_Mem(); | |
344 SWPointer p1(s1, this); | |
345 // Discard if pre loop can't align this reference | |
346 if (!ref_is_alignable(p1)) { | |
347 *cmp_ct.adr_at(i) = 0; | |
348 continue; | |
349 } | |
350 for (uint j = i+1; j < memops.size(); j++) { | |
351 MemNode* s2 = memops.at(j)->as_Mem(); | |
352 if (isomorphic(s1, s2)) { | |
353 SWPointer p2(s2, this); | |
354 if (p1.comparable(p2)) { | |
355 (*cmp_ct.adr_at(i))++; | |
356 (*cmp_ct.adr_at(j))++; | |
357 } | |
358 } | |
359 } | |
360 } | |
361 | |
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362 // Find Store (or Load) with the greatest number of "comparable" references, |
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363 // biggest vector size, smallest data size and smallest iv offset. |
0 | 364 int max_ct = 0; |
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365 int max_vw = 0; |
0 | 366 int max_idx = -1; |
367 int min_size = max_jint; | |
368 int min_iv_offset = max_jint; | |
369 for (uint j = 0; j < memops.size(); j++) { | |
370 MemNode* s = memops.at(j)->as_Mem(); | |
371 if (s->is_Store()) { | |
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372 int vw = vector_width_in_bytes(s); |
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373 assert(vw > 1, "sanity"); |
0 | 374 SWPointer p(s, this); |
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375 if (cmp_ct.at(j) > max_ct || |
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376 cmp_ct.at(j) == max_ct && |
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377 (vw > max_vw || |
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378 vw == max_vw && |
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379 (data_size(s) < min_size || |
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380 data_size(s) == min_size && |
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381 (p.offset_in_bytes() < min_iv_offset)))) { |
0 | 382 max_ct = cmp_ct.at(j); |
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383 max_vw = vw; |
0 | 384 max_idx = j; |
385 min_size = data_size(s); | |
386 min_iv_offset = p.offset_in_bytes(); | |
387 } | |
388 } | |
389 } | |
390 // If no stores, look at loads | |
391 if (max_ct == 0) { | |
392 for (uint j = 0; j < memops.size(); j++) { | |
393 MemNode* s = memops.at(j)->as_Mem(); | |
394 if (s->is_Load()) { | |
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395 int vw = vector_width_in_bytes(s); |
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396 assert(vw > 1, "sanity"); |
0 | 397 SWPointer p(s, this); |
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398 if (cmp_ct.at(j) > max_ct || |
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399 cmp_ct.at(j) == max_ct && |
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400 (vw > max_vw || |
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401 vw == max_vw && |
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402 (data_size(s) < min_size || |
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403 data_size(s) == min_size && |
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404 (p.offset_in_bytes() < min_iv_offset)))) { |
0 | 405 max_ct = cmp_ct.at(j); |
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406 max_vw = vw; |
0 | 407 max_idx = j; |
408 min_size = data_size(s); | |
409 min_iv_offset = p.offset_in_bytes(); | |
410 } | |
411 } | |
412 } | |
413 } | |
414 | |
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415 #ifdef ASSERT |
0 | 416 if (TraceSuperWord && Verbose) { |
417 tty->print_cr("\nVector memops after find_align_to_refs"); | |
418 for (uint i = 0; i < memops.size(); i++) { | |
419 MemNode* s = memops.at(i)->as_Mem(); | |
420 s->dump(); | |
421 } | |
422 } | |
423 #endif | |
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424 |
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425 if (max_ct > 0) { |
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426 #ifdef ASSERT |
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427 if (TraceSuperWord) { |
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428 tty->print("\nVector align to node: "); |
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429 memops.at(max_idx)->as_Mem()->dump(); |
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430 } |
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431 #endif |
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432 return memops.at(max_idx)->as_Mem(); |
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433 } |
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434 return NULL; |
0 | 435 } |
436 | |
437 //------------------------------ref_is_alignable--------------------------- | |
438 // Can the preloop align the reference to position zero in the vector? | |
439 bool SuperWord::ref_is_alignable(SWPointer& p) { | |
440 if (!p.has_iv()) { | |
441 return true; // no induction variable | |
442 } | |
443 CountedLoopEndNode* pre_end = get_pre_loop_end(lp()->as_CountedLoop()); | |
444 assert(pre_end->stride_is_con(), "pre loop stride is constant"); | |
445 int preloop_stride = pre_end->stride_con(); | |
446 | |
447 int span = preloop_stride * p.scale_in_bytes(); | |
448 | |
449 // Stride one accesses are alignable. | |
450 if (ABS(span) == p.memory_size()) | |
451 return true; | |
452 | |
453 // If initial offset from start of object is computable, | |
454 // compute alignment within the vector. | |
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455 int vw = vector_width_in_bytes(p.mem()); |
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456 assert(vw > 1, "sanity"); |
0 | 457 if (vw % span == 0) { |
458 Node* init_nd = pre_end->init_trip(); | |
459 if (init_nd->is_Con() && p.invar() == NULL) { | |
460 int init = init_nd->bottom_type()->is_int()->get_con(); | |
461 | |
462 int init_offset = init * p.scale_in_bytes() + p.offset_in_bytes(); | |
463 assert(init_offset >= 0, "positive offset from object start"); | |
464 | |
465 if (span > 0) { | |
466 return (vw - (init_offset % vw)) % span == 0; | |
467 } else { | |
468 assert(span < 0, "nonzero stride * scale"); | |
469 return (init_offset % vw) % -span == 0; | |
470 } | |
471 } | |
472 } | |
473 return false; | |
474 } | |
475 | |
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476 //---------------------------get_iv_adjustment--------------------------- |
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477 // Calculate loop's iv adjustment for this memory ops. |
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478 int SuperWord::get_iv_adjustment(MemNode* mem_ref) { |
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479 SWPointer align_to_ref_p(mem_ref, this); |
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480 int offset = align_to_ref_p.offset_in_bytes(); |
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481 int scale = align_to_ref_p.scale_in_bytes(); |
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482 int vw = vector_width_in_bytes(mem_ref); |
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483 assert(vw > 1, "sanity"); |
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484 int stride_sign = (scale * iv_stride()) > 0 ? 1 : -1; |
6794 | 485 // At least one iteration is executed in pre-loop by default. As result |
486 // several iterations are needed to align memory operations in main-loop even | |
487 // if offset is 0. | |
488 int iv_adjustment_in_bytes = (stride_sign * vw - (offset % vw)); | |
489 int elt_size = align_to_ref_p.memory_size(); | |
490 assert(((ABS(iv_adjustment_in_bytes) % elt_size) == 0), | |
491 err_msg_res("(%d) should be divisible by (%d)", iv_adjustment_in_bytes, elt_size)); | |
492 int iv_adjustment = iv_adjustment_in_bytes/elt_size; | |
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493 |
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494 #ifndef PRODUCT |
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495 if (TraceSuperWord) |
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496 tty->print_cr("\noffset = %d iv_adjust = %d elt_size = %d scale = %d iv_stride = %d vect_size %d", |
6794 | 497 offset, iv_adjustment, elt_size, scale, iv_stride(), vw); |
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498 #endif |
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499 return iv_adjustment; |
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500 } |
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501 |
0 | 502 //---------------------------dependence_graph--------------------------- |
503 // Construct dependency graph. | |
504 // Add dependence edges to load/store nodes for memory dependence | |
505 // A.out()->DependNode.in(1) and DependNode.out()->B.prec(x) | |
506 void SuperWord::dependence_graph() { | |
507 // First, assign a dependence node to each memory node | |
508 for (int i = 0; i < _block.length(); i++ ) { | |
509 Node *n = _block.at(i); | |
510 if (n->is_Mem() || n->is_Phi() && n->bottom_type() == Type::MEMORY) { | |
511 _dg.make_node(n); | |
512 } | |
513 } | |
514 | |
515 // For each memory slice, create the dependences | |
516 for (int i = 0; i < _mem_slice_head.length(); i++) { | |
517 Node* n = _mem_slice_head.at(i); | |
518 Node* n_tail = _mem_slice_tail.at(i); | |
519 | |
520 // Get slice in predecessor order (last is first) | |
521 mem_slice_preds(n_tail, n, _nlist); | |
522 | |
523 // Make the slice dependent on the root | |
524 DepMem* slice = _dg.dep(n); | |
525 _dg.make_edge(_dg.root(), slice); | |
526 | |
527 // Create a sink for the slice | |
528 DepMem* slice_sink = _dg.make_node(NULL); | |
529 _dg.make_edge(slice_sink, _dg.tail()); | |
530 | |
531 // Now visit each pair of memory ops, creating the edges | |
532 for (int j = _nlist.length() - 1; j >= 0 ; j--) { | |
533 Node* s1 = _nlist.at(j); | |
534 | |
535 // If no dependency yet, use slice | |
536 if (_dg.dep(s1)->in_cnt() == 0) { | |
537 _dg.make_edge(slice, s1); | |
538 } | |
539 SWPointer p1(s1->as_Mem(), this); | |
540 bool sink_dependent = true; | |
541 for (int k = j - 1; k >= 0; k--) { | |
542 Node* s2 = _nlist.at(k); | |
543 if (s1->is_Load() && s2->is_Load()) | |
544 continue; | |
545 SWPointer p2(s2->as_Mem(), this); | |
546 | |
547 int cmp = p1.cmp(p2); | |
548 if (SuperWordRTDepCheck && | |
549 p1.base() != p2.base() && p1.valid() && p2.valid()) { | |
550 // Create a runtime check to disambiguate | |
551 OrderedPair pp(p1.base(), p2.base()); | |
552 _disjoint_ptrs.append_if_missing(pp); | |
553 } else if (!SWPointer::not_equal(cmp)) { | |
554 // Possibly same address | |
555 _dg.make_edge(s1, s2); | |
556 sink_dependent = false; | |
557 } | |
558 } | |
559 if (sink_dependent) { | |
560 _dg.make_edge(s1, slice_sink); | |
561 } | |
562 } | |
563 #ifndef PRODUCT | |
564 if (TraceSuperWord) { | |
565 tty->print_cr("\nDependence graph for slice: %d", n->_idx); | |
566 for (int q = 0; q < _nlist.length(); q++) { | |
567 _dg.print(_nlist.at(q)); | |
568 } | |
569 tty->cr(); | |
570 } | |
571 #endif | |
572 _nlist.clear(); | |
573 } | |
574 | |
575 #ifndef PRODUCT | |
576 if (TraceSuperWord) { | |
577 tty->print_cr("\ndisjoint_ptrs: %s", _disjoint_ptrs.length() > 0 ? "" : "NONE"); | |
578 for (int r = 0; r < _disjoint_ptrs.length(); r++) { | |
579 _disjoint_ptrs.at(r).print(); | |
580 tty->cr(); | |
581 } | |
582 tty->cr(); | |
583 } | |
584 #endif | |
585 } | |
586 | |
587 //---------------------------mem_slice_preds--------------------------- | |
588 // Return a memory slice (node list) in predecessor order starting at "start" | |
589 void SuperWord::mem_slice_preds(Node* start, Node* stop, GrowableArray<Node*> &preds) { | |
590 assert(preds.length() == 0, "start empty"); | |
591 Node* n = start; | |
592 Node* prev = NULL; | |
593 while (true) { | |
594 assert(in_bb(n), "must be in block"); | |
595 for (DUIterator_Fast imax, i = n->fast_outs(imax); i < imax; i++) { | |
596 Node* out = n->fast_out(i); | |
597 if (out->is_Load()) { | |
598 if (in_bb(out)) { | |
599 preds.push(out); | |
600 } | |
601 } else { | |
602 // FIXME | |
603 if (out->is_MergeMem() && !in_bb(out)) { | |
604 // Either unrolling is causing a memory edge not to disappear, | |
605 // or need to run igvn.optimize() again before SLP | |
606 } else if (out->is_Phi() && out->bottom_type() == Type::MEMORY && !in_bb(out)) { | |
607 // Ditto. Not sure what else to check further. | |
667 | 608 } else if (out->Opcode() == Op_StoreCM && out->in(MemNode::OopStore) == n) { |
0 | 609 // StoreCM has an input edge used as a precedence edge. |
610 // Maybe an issue when oop stores are vectorized. | |
611 } else { | |
612 assert(out == prev || prev == NULL, "no branches off of store slice"); | |
613 } | |
614 } | |
615 } | |
616 if (n == stop) break; | |
617 preds.push(n); | |
618 prev = n; | |
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619 assert(n->is_Mem(), err_msg_res("unexpected node %s", n->Name())); |
0 | 620 n = n->in(MemNode::Memory); |
621 } | |
622 } | |
623 | |
624 //------------------------------stmts_can_pack--------------------------- | |
605 | 625 // Can s1 and s2 be in a pack with s1 immediately preceding s2 and |
0 | 626 // s1 aligned at "align" |
627 bool SuperWord::stmts_can_pack(Node* s1, Node* s2, int align) { | |
987
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628 |
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629 // Do not use superword for non-primitives |
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630 BasicType bt1 = velt_basic_type(s1); |
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631 BasicType bt2 = velt_basic_type(s2); |
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632 if(!is_java_primitive(bt1) || !is_java_primitive(bt2)) |
987
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633 return false; |
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634 if (Matcher::max_vector_size(bt1) < 2) { |
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635 return false; // No vectors for this type |
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636 } |
987
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637 |
0 | 638 if (isomorphic(s1, s2)) { |
639 if (independent(s1, s2)) { | |
640 if (!exists_at(s1, 0) && !exists_at(s2, 1)) { | |
641 if (!s1->is_Mem() || are_adjacent_refs(s1, s2)) { | |
642 int s1_align = alignment(s1); | |
643 int s2_align = alignment(s2); | |
644 if (s1_align == top_align || s1_align == align) { | |
645 if (s2_align == top_align || s2_align == align + data_size(s1)) { | |
646 return true; | |
647 } | |
648 } | |
649 } | |
650 } | |
651 } | |
652 } | |
653 return false; | |
654 } | |
655 | |
656 //------------------------------exists_at--------------------------- | |
657 // Does s exist in a pack at position pos? | |
658 bool SuperWord::exists_at(Node* s, uint pos) { | |
659 for (int i = 0; i < _packset.length(); i++) { | |
660 Node_List* p = _packset.at(i); | |
661 if (p->at(pos) == s) { | |
662 return true; | |
663 } | |
664 } | |
665 return false; | |
666 } | |
667 | |
668 //------------------------------are_adjacent_refs--------------------------- | |
669 // Is s1 immediately before s2 in memory? | |
670 bool SuperWord::are_adjacent_refs(Node* s1, Node* s2) { | |
671 if (!s1->is_Mem() || !s2->is_Mem()) return false; | |
672 if (!in_bb(s1) || !in_bb(s2)) return false; | |
1585 | 673 |
674 // Do not use superword for non-primitives | |
675 if (!is_java_primitive(s1->as_Mem()->memory_type()) || | |
676 !is_java_primitive(s2->as_Mem()->memory_type())) { | |
677 return false; | |
678 } | |
679 | |
0 | 680 // FIXME - co_locate_pack fails on Stores in different mem-slices, so |
681 // only pack memops that are in the same alias set until that's fixed. | |
682 if (_phase->C->get_alias_index(s1->as_Mem()->adr_type()) != | |
683 _phase->C->get_alias_index(s2->as_Mem()->adr_type())) | |
684 return false; | |
685 SWPointer p1(s1->as_Mem(), this); | |
686 SWPointer p2(s2->as_Mem(), this); | |
687 if (p1.base() != p2.base() || !p1.comparable(p2)) return false; | |
688 int diff = p2.offset_in_bytes() - p1.offset_in_bytes(); | |
689 return diff == data_size(s1); | |
690 } | |
691 | |
692 //------------------------------isomorphic--------------------------- | |
693 // Are s1 and s2 similar? | |
694 bool SuperWord::isomorphic(Node* s1, Node* s2) { | |
695 if (s1->Opcode() != s2->Opcode()) return false; | |
696 if (s1->req() != s2->req()) return false; | |
697 if (s1->in(0) != s2->in(0)) return false; | |
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698 if (!same_velt_type(s1, s2)) return false; |
0 | 699 return true; |
700 } | |
701 | |
702 //------------------------------independent--------------------------- | |
703 // Is there no data path from s1 to s2 or s2 to s1? | |
704 bool SuperWord::independent(Node* s1, Node* s2) { | |
705 // assert(s1->Opcode() == s2->Opcode(), "check isomorphic first"); | |
706 int d1 = depth(s1); | |
707 int d2 = depth(s2); | |
708 if (d1 == d2) return s1 != s2; | |
709 Node* deep = d1 > d2 ? s1 : s2; | |
710 Node* shallow = d1 > d2 ? s2 : s1; | |
711 | |
712 visited_clear(); | |
713 | |
714 return independent_path(shallow, deep); | |
715 } | |
716 | |
717 //------------------------------independent_path------------------------------ | |
718 // Helper for independent | |
719 bool SuperWord::independent_path(Node* shallow, Node* deep, uint dp) { | |
720 if (dp >= 1000) return false; // stop deep recursion | |
721 visited_set(deep); | |
722 int shal_depth = depth(shallow); | |
723 assert(shal_depth <= depth(deep), "must be"); | |
724 for (DepPreds preds(deep, _dg); !preds.done(); preds.next()) { | |
725 Node* pred = preds.current(); | |
726 if (in_bb(pred) && !visited_test(pred)) { | |
727 if (shallow == pred) { | |
728 return false; | |
729 } | |
730 if (shal_depth < depth(pred) && !independent_path(shallow, pred, dp+1)) { | |
731 return false; | |
732 } | |
733 } | |
734 } | |
735 return true; | |
736 } | |
737 | |
738 //------------------------------set_alignment--------------------------- | |
739 void SuperWord::set_alignment(Node* s1, Node* s2, int align) { | |
740 set_alignment(s1, align); | |
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741 if (align == top_align || align == bottom_align) { |
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742 set_alignment(s2, align); |
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743 } else { |
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744 set_alignment(s2, align + data_size(s1)); |
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745 } |
0 | 746 } |
747 | |
748 //------------------------------data_size--------------------------- | |
749 int SuperWord::data_size(Node* s) { | |
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750 int bsize = type2aelembytes(velt_basic_type(s)); |
0 | 751 assert(bsize != 0, "valid size"); |
752 return bsize; | |
753 } | |
754 | |
755 //------------------------------extend_packlist--------------------------- | |
756 // Extend packset by following use->def and def->use links from pack members. | |
757 void SuperWord::extend_packlist() { | |
758 bool changed; | |
759 do { | |
760 changed = false; | |
761 for (int i = 0; i < _packset.length(); i++) { | |
762 Node_List* p = _packset.at(i); | |
763 changed |= follow_use_defs(p); | |
764 changed |= follow_def_uses(p); | |
765 } | |
766 } while (changed); | |
767 | |
768 #ifndef PRODUCT | |
769 if (TraceSuperWord) { | |
770 tty->print_cr("\nAfter extend_packlist"); | |
771 print_packset(); | |
772 } | |
773 #endif | |
774 } | |
775 | |
776 //------------------------------follow_use_defs--------------------------- | |
777 // Extend the packset by visiting operand definitions of nodes in pack p | |
778 bool SuperWord::follow_use_defs(Node_List* p) { | |
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779 assert(p->size() == 2, "just checking"); |
0 | 780 Node* s1 = p->at(0); |
781 Node* s2 = p->at(1); | |
782 assert(s1->req() == s2->req(), "just checking"); | |
783 assert(alignment(s1) + data_size(s1) == alignment(s2), "just checking"); | |
784 | |
785 if (s1->is_Load()) return false; | |
786 | |
787 int align = alignment(s1); | |
788 bool changed = false; | |
789 int start = s1->is_Store() ? MemNode::ValueIn : 1; | |
790 int end = s1->is_Store() ? MemNode::ValueIn+1 : s1->req(); | |
791 for (int j = start; j < end; j++) { | |
792 Node* t1 = s1->in(j); | |
793 Node* t2 = s2->in(j); | |
794 if (!in_bb(t1) || !in_bb(t2)) | |
795 continue; | |
796 if (stmts_can_pack(t1, t2, align)) { | |
797 if (est_savings(t1, t2) >= 0) { | |
798 Node_List* pair = new Node_List(); | |
799 pair->push(t1); | |
800 pair->push(t2); | |
801 _packset.append(pair); | |
802 set_alignment(t1, t2, align); | |
803 changed = true; | |
804 } | |
805 } | |
806 } | |
807 return changed; | |
808 } | |
809 | |
810 //------------------------------follow_def_uses--------------------------- | |
811 // Extend the packset by visiting uses of nodes in pack p | |
812 bool SuperWord::follow_def_uses(Node_List* p) { | |
813 bool changed = false; | |
814 Node* s1 = p->at(0); | |
815 Node* s2 = p->at(1); | |
816 assert(p->size() == 2, "just checking"); | |
817 assert(s1->req() == s2->req(), "just checking"); | |
818 assert(alignment(s1) + data_size(s1) == alignment(s2), "just checking"); | |
819 | |
820 if (s1->is_Store()) return false; | |
821 | |
822 int align = alignment(s1); | |
823 int savings = -1; | |
824 Node* u1 = NULL; | |
825 Node* u2 = NULL; | |
826 for (DUIterator_Fast imax, i = s1->fast_outs(imax); i < imax; i++) { | |
827 Node* t1 = s1->fast_out(i); | |
828 if (!in_bb(t1)) continue; | |
829 for (DUIterator_Fast jmax, j = s2->fast_outs(jmax); j < jmax; j++) { | |
830 Node* t2 = s2->fast_out(j); | |
831 if (!in_bb(t2)) continue; | |
832 if (!opnd_positions_match(s1, t1, s2, t2)) | |
833 continue; | |
834 if (stmts_can_pack(t1, t2, align)) { | |
835 int my_savings = est_savings(t1, t2); | |
836 if (my_savings > savings) { | |
837 savings = my_savings; | |
838 u1 = t1; | |
839 u2 = t2; | |
840 } | |
841 } | |
842 } | |
843 } | |
844 if (savings >= 0) { | |
845 Node_List* pair = new Node_List(); | |
846 pair->push(u1); | |
847 pair->push(u2); | |
848 _packset.append(pair); | |
849 set_alignment(u1, u2, align); | |
850 changed = true; | |
851 } | |
852 return changed; | |
853 } | |
854 | |
855 //---------------------------opnd_positions_match------------------------- | |
856 // Is the use of d1 in u1 at the same operand position as d2 in u2? | |
857 bool SuperWord::opnd_positions_match(Node* d1, Node* u1, Node* d2, Node* u2) { | |
858 uint ct = u1->req(); | |
859 if (ct != u2->req()) return false; | |
860 uint i1 = 0; | |
861 uint i2 = 0; | |
862 do { | |
863 for (i1++; i1 < ct; i1++) if (u1->in(i1) == d1) break; | |
864 for (i2++; i2 < ct; i2++) if (u2->in(i2) == d2) break; | |
865 if (i1 != i2) { | |
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866 if ((i1 == (3-i2)) && (u2->is_Add() || u2->is_Mul())) { |
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867 // Further analysis relies on operands position matching. |
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868 u2->swap_edges(i1, i2); |
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869 } else { |
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870 return false; |
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871 } |
0 | 872 } |
873 } while (i1 < ct); | |
874 return true; | |
875 } | |
876 | |
877 //------------------------------est_savings--------------------------- | |
878 // Estimate the savings from executing s1 and s2 as a pack | |
879 int SuperWord::est_savings(Node* s1, Node* s2) { | |
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880 int save_in = 2 - 1; // 2 operations per instruction in packed form |
0 | 881 |
882 // inputs | |
883 for (uint i = 1; i < s1->req(); i++) { | |
884 Node* x1 = s1->in(i); | |
885 Node* x2 = s2->in(i); | |
886 if (x1 != x2) { | |
887 if (are_adjacent_refs(x1, x2)) { | |
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888 save_in += adjacent_profit(x1, x2); |
0 | 889 } else if (!in_packset(x1, x2)) { |
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890 save_in -= pack_cost(2); |
0 | 891 } else { |
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892 save_in += unpack_cost(2); |
0 | 893 } |
894 } | |
895 } | |
896 | |
897 // uses of result | |
898 uint ct = 0; | |
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899 int save_use = 0; |
0 | 900 for (DUIterator_Fast imax, i = s1->fast_outs(imax); i < imax; i++) { |
901 Node* s1_use = s1->fast_out(i); | |
902 for (int j = 0; j < _packset.length(); j++) { | |
903 Node_List* p = _packset.at(j); | |
904 if (p->at(0) == s1_use) { | |
905 for (DUIterator_Fast kmax, k = s2->fast_outs(kmax); k < kmax; k++) { | |
906 Node* s2_use = s2->fast_out(k); | |
907 if (p->at(p->size()-1) == s2_use) { | |
908 ct++; | |
909 if (are_adjacent_refs(s1_use, s2_use)) { | |
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910 save_use += adjacent_profit(s1_use, s2_use); |
0 | 911 } |
912 } | |
913 } | |
914 } | |
915 } | |
916 } | |
917 | |
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918 if (ct < s1->outcnt()) save_use += unpack_cost(1); |
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919 if (ct < s2->outcnt()) save_use += unpack_cost(1); |
0 | 920 |
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921 return MAX2(save_in, save_use); |
0 | 922 } |
923 | |
924 //------------------------------costs--------------------------- | |
925 int SuperWord::adjacent_profit(Node* s1, Node* s2) { return 2; } | |
926 int SuperWord::pack_cost(int ct) { return ct; } | |
927 int SuperWord::unpack_cost(int ct) { return ct; } | |
928 | |
929 //------------------------------combine_packs--------------------------- | |
930 // Combine packs A and B with A.last == B.first into A.first..,A.last,B.second,..B.last | |
931 void SuperWord::combine_packs() { | |
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932 bool changed = true; |
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933 // Combine packs regardless max vector size. |
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934 while (changed) { |
0 | 935 changed = false; |
936 for (int i = 0; i < _packset.length(); i++) { | |
937 Node_List* p1 = _packset.at(i); | |
938 if (p1 == NULL) continue; | |
939 for (int j = 0; j < _packset.length(); j++) { | |
940 Node_List* p2 = _packset.at(j); | |
941 if (p2 == NULL) continue; | |
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942 if (i == j) continue; |
0 | 943 if (p1->at(p1->size()-1) == p2->at(0)) { |
944 for (uint k = 1; k < p2->size(); k++) { | |
945 p1->push(p2->at(k)); | |
946 } | |
947 _packset.at_put(j, NULL); | |
948 changed = true; | |
949 } | |
950 } | |
951 } | |
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952 } |
0 | 953 |
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954 // Split packs which have size greater then max vector size. |
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955 for (int i = 0; i < _packset.length(); i++) { |
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956 Node_List* p1 = _packset.at(i); |
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957 if (p1 != NULL) { |
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958 BasicType bt = velt_basic_type(p1->at(0)); |
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959 uint max_vlen = Matcher::max_vector_size(bt); // Max elements in vector |
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960 assert(is_power_of_2(max_vlen), "sanity"); |
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961 uint psize = p1->size(); |
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962 if (!is_power_of_2(psize)) { |
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963 // Skip pack which can't be vector. |
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964 // case1: for(...) { a[i] = i; } elements values are different (i+x) |
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965 // case2: for(...) { a[i] = b[i+1]; } can't align both, load and store |
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966 _packset.at_put(i, NULL); |
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967 continue; |
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968 } |
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969 if (psize > max_vlen) { |
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970 Node_List* pack = new Node_List(); |
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971 for (uint j = 0; j < psize; j++) { |
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972 pack->push(p1->at(j)); |
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973 if (pack->size() >= max_vlen) { |
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974 assert(is_power_of_2(pack->size()), "sanity"); |
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975 _packset.append(pack); |
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976 pack = new Node_List(); |
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977 } |
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978 } |
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979 _packset.at_put(i, NULL); |
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980 } |
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981 } |
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982 } |
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983 |
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984 // Compress list. |
0 | 985 for (int i = _packset.length() - 1; i >= 0; i--) { |
986 Node_List* p1 = _packset.at(i); | |
987 if (p1 == NULL) { | |
988 _packset.remove_at(i); | |
989 } | |
990 } | |
991 | |
992 #ifndef PRODUCT | |
993 if (TraceSuperWord) { | |
994 tty->print_cr("\nAfter combine_packs"); | |
995 print_packset(); | |
996 } | |
997 #endif | |
998 } | |
999 | |
1000 //-----------------------------construct_my_pack_map-------------------------- | |
1001 // Construct the map from nodes to packs. Only valid after the | |
1002 // point where a node is only in one pack (after combine_packs). | |
1003 void SuperWord::construct_my_pack_map() { | |
1004 Node_List* rslt = NULL; | |
1005 for (int i = 0; i < _packset.length(); i++) { | |
1006 Node_List* p = _packset.at(i); | |
1007 for (uint j = 0; j < p->size(); j++) { | |
1008 Node* s = p->at(j); | |
1009 assert(my_pack(s) == NULL, "only in one pack"); | |
1010 set_my_pack(s, p); | |
1011 } | |
1012 } | |
1013 } | |
1014 | |
1015 //------------------------------filter_packs--------------------------- | |
1016 // Remove packs that are not implemented or not profitable. | |
1017 void SuperWord::filter_packs() { | |
1018 | |
1019 // Remove packs that are not implemented | |
1020 for (int i = _packset.length() - 1; i >= 0; i--) { | |
1021 Node_List* pk = _packset.at(i); | |
1022 bool impl = implemented(pk); | |
1023 if (!impl) { | |
1024 #ifndef PRODUCT | |
1025 if (TraceSuperWord && Verbose) { | |
1026 tty->print_cr("Unimplemented"); | |
1027 pk->at(0)->dump(); | |
1028 } | |
1029 #endif | |
1030 remove_pack_at(i); | |
1031 } | |
1032 } | |
1033 | |
1034 // Remove packs that are not profitable | |
1035 bool changed; | |
1036 do { | |
1037 changed = false; | |
1038 for (int i = _packset.length() - 1; i >= 0; i--) { | |
1039 Node_List* pk = _packset.at(i); | |
1040 bool prof = profitable(pk); | |
1041 if (!prof) { | |
1042 #ifndef PRODUCT | |
1043 if (TraceSuperWord && Verbose) { | |
1044 tty->print_cr("Unprofitable"); | |
1045 pk->at(0)->dump(); | |
1046 } | |
1047 #endif | |
1048 remove_pack_at(i); | |
1049 changed = true; | |
1050 } | |
1051 } | |
1052 } while (changed); | |
1053 | |
1054 #ifndef PRODUCT | |
1055 if (TraceSuperWord) { | |
1056 tty->print_cr("\nAfter filter_packs"); | |
1057 print_packset(); | |
1058 tty->cr(); | |
1059 } | |
1060 #endif | |
1061 } | |
1062 | |
1063 //------------------------------implemented--------------------------- | |
1064 // Can code be generated for pack p? | |
1065 bool SuperWord::implemented(Node_List* p) { | |
1066 Node* p0 = p->at(0); | |
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1067 return VectorNode::implemented(p0->Opcode(), p->size(), velt_basic_type(p0)); |
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1068 } |
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1069 |
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1070 //------------------------------same_inputs-------------------------- |
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1071 // For pack p, are all idx operands the same? |
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1072 static bool same_inputs(Node_List* p, int idx) { |
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1073 Node* p0 = p->at(0); |
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1074 uint vlen = p->size(); |
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1075 Node* p0_def = p0->in(idx); |
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1076 for (uint i = 1; i < vlen; i++) { |
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1077 Node* pi = p->at(i); |
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1078 Node* pi_def = pi->in(idx); |
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1079 if (p0_def != pi_def) |
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1080 return false; |
6617 | 1081 } |
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1082 return true; |
0 | 1083 } |
1084 | |
1085 //------------------------------profitable--------------------------- | |
1086 // For pack p, are all operands and all uses (with in the block) vector? | |
1087 bool SuperWord::profitable(Node_List* p) { | |
1088 Node* p0 = p->at(0); | |
1089 uint start, end; | |
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1090 VectorNode::vector_operands(p0, &start, &end); |
0 | 1091 |
6803 | 1092 // Return false if some inputs are not vectors or vectors with different |
1093 // size or alignment. | |
1094 // Also, for now, return false if not scalar promotion case when inputs are | |
1095 // the same. Later, implement PackNode and allow differing, non-vector inputs | |
1096 // (maybe just the ones from outside the block.) | |
0 | 1097 for (uint i = start; i < end; i++) { |
6803 | 1098 if (!is_vector_use(p0, i)) |
1099 return false; | |
0 | 1100 } |
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1101 if (VectorNode::is_shift(p0)) { |
6803 | 1102 // For now, return false if shift count is vector or not scalar promotion |
1103 // case (different shift counts) because it is not supported yet. | |
1104 Node* cnt = p0->in(2); | |
1105 Node_List* cnt_pk = my_pack(cnt); | |
1106 if (cnt_pk != NULL) | |
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1107 return false; |
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1108 if (!same_inputs(p, 2)) |
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1109 return false; |
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1110 } |
0 | 1111 if (!p0->is_Store()) { |
1112 // For now, return false if not all uses are vector. | |
1113 // Later, implement ExtractNode and allow non-vector uses (maybe | |
1114 // just the ones outside the block.) | |
1115 for (uint i = 0; i < p->size(); i++) { | |
1116 Node* def = p->at(i); | |
1117 for (DUIterator_Fast jmax, j = def->fast_outs(jmax); j < jmax; j++) { | |
1118 Node* use = def->fast_out(j); | |
1119 for (uint k = 0; k < use->req(); k++) { | |
1120 Node* n = use->in(k); | |
1121 if (def == n) { | |
1122 if (!is_vector_use(use, k)) { | |
1123 return false; | |
1124 } | |
1125 } | |
1126 } | |
1127 } | |
1128 } | |
1129 } | |
1130 return true; | |
1131 } | |
1132 | |
1133 //------------------------------schedule--------------------------- | |
1134 // Adjust the memory graph for the packed operations | |
1135 void SuperWord::schedule() { | |
1136 | |
1137 // Co-locate in the memory graph the members of each memory pack | |
1138 for (int i = 0; i < _packset.length(); i++) { | |
1139 co_locate_pack(_packset.at(i)); | |
1140 } | |
1141 } | |
1142 | |
667 | 1143 //-------------------------------remove_and_insert------------------- |
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1144 // Remove "current" from its current position in the memory graph and insert |
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1145 // it after the appropriate insertion point (lip or uip). |
667 | 1146 void SuperWord::remove_and_insert(MemNode *current, MemNode *prev, MemNode *lip, |
1147 Node *uip, Unique_Node_List &sched_before) { | |
1148 Node* my_mem = current->in(MemNode::Memory); | |
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1149 bool sched_up = sched_before.member(current); |
667 | 1150 |
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1151 // remove current_store from its current position in the memmory graph |
667 | 1152 for (DUIterator i = current->outs(); current->has_out(i); i++) { |
1153 Node* use = current->out(i); | |
1154 if (use->is_Mem()) { | |
1155 assert(use->in(MemNode::Memory) == current, "must be"); | |
1156 if (use == prev) { // connect prev to my_mem | |
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1157 _igvn.replace_input_of(use, MemNode::Memory, my_mem); |
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1158 --i; //deleted this edge; rescan position |
667 | 1159 } else if (sched_before.member(use)) { |
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1160 if (!sched_up) { // Will be moved together with current |
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1161 _igvn.replace_input_of(use, MemNode::Memory, uip); |
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1162 --i; //deleted this edge; rescan position |
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1163 } |
667 | 1164 } else { |
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1165 if (sched_up) { // Will be moved together with current |
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1166 _igvn.replace_input_of(use, MemNode::Memory, lip); |
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1167 --i; //deleted this edge; rescan position |
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1168 } |
667 | 1169 } |
1170 } | |
1171 } | |
1172 | |
1173 Node *insert_pt = sched_up ? uip : lip; | |
1174 | |
1175 // all uses of insert_pt's memory state should use current's instead | |
1176 for (DUIterator i = insert_pt->outs(); insert_pt->has_out(i); i++) { | |
1177 Node* use = insert_pt->out(i); | |
1178 if (use->is_Mem()) { | |
1179 assert(use->in(MemNode::Memory) == insert_pt, "must be"); | |
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1180 _igvn.replace_input_of(use, MemNode::Memory, current); |
667 | 1181 --i; //deleted this edge; rescan position |
1182 } else if (!sched_up && use->is_Phi() && use->bottom_type() == Type::MEMORY) { | |
1183 uint pos; //lip (lower insert point) must be the last one in the memory slice | |
1184 for (pos=1; pos < use->req(); pos++) { | |
1185 if (use->in(pos) == insert_pt) break; | |
1186 } | |
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1187 _igvn.replace_input_of(use, pos, current); |
667 | 1188 --i; |
1189 } | |
1190 } | |
1191 | |
1192 //connect current to insert_pt | |
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1193 _igvn.replace_input_of(current, MemNode::Memory, insert_pt); |
667 | 1194 } |
1195 | |
1196 //------------------------------co_locate_pack---------------------------------- | |
1197 // To schedule a store pack, we need to move any sandwiched memory ops either before | |
1198 // or after the pack, based upon dependence information: | |
1199 // (1) If any store in the pack depends on the sandwiched memory op, the | |
1200 // sandwiched memory op must be scheduled BEFORE the pack; | |
1201 // (2) If a sandwiched memory op depends on any store in the pack, the | |
1202 // sandwiched memory op must be scheduled AFTER the pack; | |
1203 // (3) If a sandwiched memory op (say, memA) depends on another sandwiched | |
1204 // memory op (say memB), memB must be scheduled before memA. So, if memA is | |
1205 // scheduled before the pack, memB must also be scheduled before the pack; | |
1206 // (4) If there is no dependence restriction for a sandwiched memory op, we simply | |
1207 // schedule this store AFTER the pack | |
1208 // (5) We know there is no dependence cycle, so there in no other case; | |
1209 // (6) Finally, all memory ops in another single pack should be moved in the same direction. | |
1210 // | |
952 | 1211 // To schedule a load pack, we use the memory state of either the first or the last load in |
1212 // the pack, based on the dependence constraint. | |
0 | 1213 void SuperWord::co_locate_pack(Node_List* pk) { |
1214 if (pk->at(0)->is_Store()) { | |
1215 MemNode* first = executed_first(pk)->as_Mem(); | |
1216 MemNode* last = executed_last(pk)->as_Mem(); | |
667 | 1217 Unique_Node_List schedule_before_pack; |
1218 Unique_Node_List memops; | |
1219 | |
0 | 1220 MemNode* current = last->in(MemNode::Memory)->as_Mem(); |
667 | 1221 MemNode* previous = last; |
0 | 1222 while (true) { |
1223 assert(in_bb(current), "stay in block"); | |
667 | 1224 memops.push(previous); |
1225 for (DUIterator i = current->outs(); current->has_out(i); i++) { | |
1226 Node* use = current->out(i); | |
1227 if (use->is_Mem() && use != previous) | |
1228 memops.push(use); | |
1229 } | |
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1230 if (current == first) break; |
667 | 1231 previous = current; |
1232 current = current->in(MemNode::Memory)->as_Mem(); | |
1233 } | |
1234 | |
1235 // determine which memory operations should be scheduled before the pack | |
1236 for (uint i = 1; i < memops.size(); i++) { | |
1237 Node *s1 = memops.at(i); | |
1238 if (!in_pack(s1, pk) && !schedule_before_pack.member(s1)) { | |
1239 for (uint j = 0; j< i; j++) { | |
1240 Node *s2 = memops.at(j); | |
1241 if (!independent(s1, s2)) { | |
1242 if (in_pack(s2, pk) || schedule_before_pack.member(s2)) { | |
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1243 schedule_before_pack.push(s1); // s1 must be scheduled before |
667 | 1244 Node_List* mem_pk = my_pack(s1); |
1245 if (mem_pk != NULL) { | |
1246 for (uint ii = 0; ii < mem_pk->size(); ii++) { | |
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1247 Node* s = mem_pk->at(ii); // follow partner |
667 | 1248 if (memops.member(s) && !schedule_before_pack.member(s)) |
1249 schedule_before_pack.push(s); | |
1250 } | |
1251 } | |
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1252 break; |
667 | 1253 } |
1254 } | |
1255 } | |
1256 } | |
1257 } | |
1258 | |
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1259 Node* upper_insert_pt = first->in(MemNode::Memory); |
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1260 // Following code moves loads connected to upper_insert_pt below aliased stores. |
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1261 // Collect such loads here and reconnect them back to upper_insert_pt later. |
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1262 memops.clear(); |
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1263 for (DUIterator i = upper_insert_pt->outs(); upper_insert_pt->has_out(i); i++) { |
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1264 Node* use = upper_insert_pt->out(i); |
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1265 if (!use->is_Store()) |
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1266 memops.push(use); |
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1267 } |
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1268 |
667 | 1269 MemNode* lower_insert_pt = last; |
1270 previous = last; //previous store in pk | |
1271 current = last->in(MemNode::Memory)->as_Mem(); | |
1272 | |
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1273 // start scheduling from "last" to "first" |
667 | 1274 while (true) { |
1275 assert(in_bb(current), "stay in block"); | |
1276 assert(in_pack(previous, pk), "previous stays in pack"); | |
0 | 1277 Node* my_mem = current->in(MemNode::Memory); |
667 | 1278 |
0 | 1279 if (in_pack(current, pk)) { |
667 | 1280 // Forward users of my memory state (except "previous) to my input memory state |
0 | 1281 for (DUIterator i = current->outs(); current->has_out(i); i++) { |
1282 Node* use = current->out(i); | |
667 | 1283 if (use->is_Mem() && use != previous) { |
0 | 1284 assert(use->in(MemNode::Memory) == current, "must be"); |
667 | 1285 if (schedule_before_pack.member(use)) { |
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1286 _igvn.replace_input_of(use, MemNode::Memory, upper_insert_pt); |
667 | 1287 } else { |
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1288 _igvn.replace_input_of(use, MemNode::Memory, lower_insert_pt); |
667 | 1289 } |
0 | 1290 --i; // deleted this edge; rescan position |
1291 } | |
1292 } | |
667 | 1293 previous = current; |
1294 } else { // !in_pack(current, pk) ==> a sandwiched store | |
1295 remove_and_insert(current, previous, lower_insert_pt, upper_insert_pt, schedule_before_pack); | |
0 | 1296 } |
667 | 1297 |
0 | 1298 if (current == first) break; |
1299 current = my_mem->as_Mem(); | |
667 | 1300 } // end while |
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1301 |
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1302 // Reconnect loads back to upper_insert_pt. |
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1303 for (uint i = 0; i < memops.size(); i++) { |
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1304 Node *ld = memops.at(i); |
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1305 if (ld->in(MemNode::Memory) != upper_insert_pt) { |
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1306 _igvn.replace_input_of(ld, MemNode::Memory, upper_insert_pt); |
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1307 } |
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1308 } |
667 | 1309 } else if (pk->at(0)->is_Load()) { //load |
952 | 1310 // all loads in the pack should have the same memory state. By default, |
1311 // we use the memory state of the last load. However, if any load could | |
1312 // not be moved down due to the dependence constraint, we use the memory | |
1313 // state of the first load. | |
1314 Node* last_mem = executed_last(pk)->in(MemNode::Memory); | |
1315 Node* first_mem = executed_first(pk)->in(MemNode::Memory); | |
1316 bool schedule_last = true; | |
1317 for (uint i = 0; i < pk->size(); i++) { | |
1318 Node* ld = pk->at(i); | |
1319 for (Node* current = last_mem; current != ld->in(MemNode::Memory); | |
1320 current=current->in(MemNode::Memory)) { | |
1321 assert(current != first_mem, "corrupted memory graph"); | |
1322 if(current->is_Mem() && !independent(current, ld)){ | |
1323 schedule_last = false; // a later store depends on this load | |
1324 break; | |
1325 } | |
1326 } | |
1327 } | |
1328 | |
1329 Node* mem_input = schedule_last ? last_mem : first_mem; | |
1330 _igvn.hash_delete(mem_input); | |
1331 // Give each load the same memory state | |
0 | 1332 for (uint i = 0; i < pk->size(); i++) { |
1333 LoadNode* ld = pk->at(i)->as_Load(); | |
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1334 _igvn.replace_input_of(ld, MemNode::Memory, mem_input); |
0 | 1335 } |
1336 } | |
1337 } | |
1338 | |
1339 //------------------------------output--------------------------- | |
1340 // Convert packs into vector node operations | |
1341 void SuperWord::output() { | |
1342 if (_packset.length() == 0) return; | |
1343 | |
2445 | 1344 #ifndef PRODUCT |
1345 if (TraceLoopOpts) { | |
1346 tty->print("SuperWord "); | |
1347 lpt()->dump_head(); | |
1348 } | |
1349 #endif | |
1350 | |
0 | 1351 // MUST ENSURE main loop's initial value is properly aligned: |
1352 // (iv_initial_value + min_iv_offset) % vector_width_in_bytes() == 0 | |
1353 | |
1354 align_initial_loop_index(align_to_ref()); | |
1355 | |
1356 // Insert extract (unpack) operations for scalar uses | |
1357 for (int i = 0; i < _packset.length(); i++) { | |
1358 insert_extracts(_packset.at(i)); | |
1359 } | |
1360 | |
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1361 Compile* C = _phase->C; |
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1362 uint max_vlen_in_bytes = 0; |
0 | 1363 for (int i = 0; i < _block.length(); i++) { |
1364 Node* n = _block.at(i); | |
1365 Node_List* p = my_pack(n); | |
1366 if (p && n == executed_last(p)) { | |
1367 uint vlen = p->size(); | |
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1368 uint vlen_in_bytes = 0; |
0 | 1369 Node* vn = NULL; |
1370 Node* low_adr = p->at(0); | |
1371 Node* first = executed_first(p); | |
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1372 int opc = n->Opcode(); |
0 | 1373 if (n->is_Load()) { |
1374 Node* ctl = n->in(MemNode::Control); | |
1375 Node* mem = first->in(MemNode::Memory); | |
1376 Node* adr = low_adr->in(MemNode::Address); | |
1377 const TypePtr* atyp = n->adr_type(); | |
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1378 vn = LoadVectorNode::make(C, opc, ctl, mem, adr, atyp, vlen, velt_basic_type(n)); |
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1379 vlen_in_bytes = vn->as_LoadVector()->memory_size(); |
0 | 1380 } else if (n->is_Store()) { |
1381 // Promote value to be stored to vector | |
3842 | 1382 Node* val = vector_opd(p, MemNode::ValueIn); |
0 | 1383 Node* ctl = n->in(MemNode::Control); |
1384 Node* mem = first->in(MemNode::Memory); | |
1385 Node* adr = low_adr->in(MemNode::Address); | |
1386 const TypePtr* atyp = n->adr_type(); | |
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1387 vn = StoreVectorNode::make(C, opc, ctl, mem, adr, atyp, val, vlen); |
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1388 vlen_in_bytes = vn->as_StoreVector()->memory_size(); |
0 | 1389 } else if (n->req() == 3) { |
1390 // Promote operands to vector | |
1391 Node* in1 = vector_opd(p, 1); | |
1392 Node* in2 = vector_opd(p, 2); | |
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1393 if (VectorNode::is_invariant_vector(in1) && (n->is_Add() || n->is_Mul())) { |
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1394 // Move invariant vector input into second position to avoid register spilling. |
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1395 Node* tmp = in1; |
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1396 in1 = in2; |
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1397 in2 = tmp; |
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1398 } |
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1399 vn = VectorNode::make(C, opc, in1, in2, vlen, velt_basic_type(n)); |
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1400 vlen_in_bytes = vn->as_Vector()->length_in_bytes(); |
0 | 1401 } else { |
1402 ShouldNotReachHere(); | |
1403 } | |
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1404 assert(vn != NULL, "sanity"); |
6803 | 1405 _igvn.register_new_node_with_optimizer(vn); |
0 | 1406 _phase->set_ctrl(vn, _phase->get_ctrl(p->at(0))); |
1407 for (uint j = 0; j < p->size(); j++) { | |
1408 Node* pm = p->at(j); | |
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1409 _igvn.replace_node(pm, vn); |
0 | 1410 } |
1411 _igvn._worklist.push(vn); | |
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1412 |
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1413 if (vlen_in_bytes > max_vlen_in_bytes) { |
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1414 max_vlen_in_bytes = vlen_in_bytes; |
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1415 } |
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1416 #ifdef ASSERT |
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1417 if (TraceNewVectors) { |
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1418 tty->print("new Vector node: "); |
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1419 vn->dump(); |
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1420 } |
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1421 #endif |
0 | 1422 } |
1423 } | |
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1424 C->set_max_vector_size(max_vlen_in_bytes); |
0 | 1425 } |
1426 | |
1427 //------------------------------vector_opd--------------------------- | |
1428 // Create a vector operand for the nodes in pack p for operand: in(opd_idx) | |
3842 | 1429 Node* SuperWord::vector_opd(Node_List* p, int opd_idx) { |
0 | 1430 Node* p0 = p->at(0); |
1431 uint vlen = p->size(); | |
1432 Node* opd = p0->in(opd_idx); | |
1433 | |
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1434 if (same_inputs(p, opd_idx)) { |
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1435 if (opd->is_Vector() || opd->is_LoadVector()) { |
6617 | 1436 assert(((opd_idx != 2) || !VectorNode::is_shift(p0)), "shift's count can't be vector"); |
3842 | 1437 return opd; // input is matching vector |
0 | 1438 } |
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1439 if ((opd_idx == 2) && VectorNode::is_shift(p0)) { |
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1440 Compile* C = _phase->C; |
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1441 Node* cnt = opd; |
6823 | 1442 // Vector instructions do not mask shift count, do it here. |
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1443 juint mask = (p0->bottom_type() == TypeInt::INT) ? (BitsPerInt - 1) : (BitsPerLong - 1); |
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1444 const TypeInt* t = opd->find_int_type(); |
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1445 if (t != NULL && t->is_con()) { |
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1446 juint shift = t->get_con(); |
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1447 if (shift > mask) { // Unsigned cmp |
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1448 cnt = ConNode::make(C, TypeInt::make(shift & mask)); |
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1449 } |
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1450 } else { |
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1451 if (t == NULL || t->_lo < 0 || t->_hi > (int)mask) { |
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1452 cnt = ConNode::make(C, TypeInt::make(mask)); |
6803 | 1453 _igvn.register_new_node_with_optimizer(cnt); |
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1454 cnt = new (C) AndINode(opd, cnt); |
6803 | 1455 _igvn.register_new_node_with_optimizer(cnt); |
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1456 _phase->set_ctrl(cnt, _phase->get_ctrl(opd)); |
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1457 } |
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1458 assert(opd->bottom_type()->isa_int(), "int type only"); |
6823 | 1459 // Move non constant shift count into vector register. |
1460 cnt = VectorNode::shift_count(C, p0, cnt, vlen, velt_basic_type(p0)); | |
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1461 } |
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1462 if (cnt != opd) { |
6803 | 1463 _igvn.register_new_node_with_optimizer(cnt); |
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1464 _phase->set_ctrl(cnt, _phase->get_ctrl(opd)); |
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1465 } |
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1466 return cnt; |
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1467 } |
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1468 assert(!opd->is_StoreVector(), "such vector is not expected here"); |
6045 | 1469 // Convert scalar input to vector with the same number of elements as |
1470 // p0's vector. Use p0's type because size of operand's container in | |
1471 // vector should match p0's size regardless operand's size. | |
1472 const Type* p0_t = velt_type(p0); | |
1473 VectorNode* vn = VectorNode::scalar2vector(_phase->C, opd, vlen, p0_t); | |
0 | 1474 |
6803 | 1475 _igvn.register_new_node_with_optimizer(vn); |
0 | 1476 _phase->set_ctrl(vn, _phase->get_ctrl(opd)); |
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1477 #ifdef ASSERT |
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1478 if (TraceNewVectors) { |
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1479 tty->print("new Vector node: "); |
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1480 vn->dump(); |
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1481 } |
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1482 #endif |
0 | 1483 return vn; |
1484 } | |
1485 | |
1486 // Insert pack operation | |
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1487 BasicType bt = velt_basic_type(p0); |
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1488 PackNode* pk = PackNode::make(_phase->C, opd, vlen, bt); |
6045 | 1489 DEBUG_ONLY( const BasicType opd_bt = opd->bottom_type()->basic_type(); ) |
0 | 1490 |
1491 for (uint i = 1; i < vlen; i++) { | |
1492 Node* pi = p->at(i); | |
1493 Node* in = pi->in(opd_idx); | |
1494 assert(my_pack(in) == NULL, "Should already have been unpacked"); | |
6045 | 1495 assert(opd_bt == in->bottom_type()->basic_type(), "all same type"); |
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1496 pk->add_opd(in); |
0 | 1497 } |
6803 | 1498 _igvn.register_new_node_with_optimizer(pk); |
0 | 1499 _phase->set_ctrl(pk, _phase->get_ctrl(opd)); |
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1500 #ifdef ASSERT |
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1501 if (TraceNewVectors) { |
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1502 tty->print("new Vector node: "); |
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1503 pk->dump(); |
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1504 } |
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1505 #endif |
0 | 1506 return pk; |
1507 } | |
1508 | |
1509 //------------------------------insert_extracts--------------------------- | |
1510 // If a use of pack p is not a vector use, then replace the | |
1511 // use with an extract operation. | |
1512 void SuperWord::insert_extracts(Node_List* p) { | |
1513 if (p->at(0)->is_Store()) return; | |
1514 assert(_n_idx_list.is_empty(), "empty (node,index) list"); | |
1515 | |
1516 // Inspect each use of each pack member. For each use that is | |
1517 // not a vector use, replace the use with an extract operation. | |
1518 | |
1519 for (uint i = 0; i < p->size(); i++) { | |
1520 Node* def = p->at(i); | |
1521 for (DUIterator_Fast jmax, j = def->fast_outs(jmax); j < jmax; j++) { | |
1522 Node* use = def->fast_out(j); | |
1523 for (uint k = 0; k < use->req(); k++) { | |
1524 Node* n = use->in(k); | |
1525 if (def == n) { | |
1526 if (!is_vector_use(use, k)) { | |
1527 _n_idx_list.push(use, k); | |
1528 } | |
1529 } | |
1530 } | |
1531 } | |
1532 } | |
1533 | |
1534 while (_n_idx_list.is_nonempty()) { | |
1535 Node* use = _n_idx_list.node(); | |
1536 int idx = _n_idx_list.index(); | |
1537 _n_idx_list.pop(); | |
1538 Node* def = use->in(idx); | |
1539 | |
1540 // Insert extract operation | |
1541 _igvn.hash_delete(def); | |
1542 int def_pos = alignment(def) / data_size(def); | |
1543 | |
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1544 Node* ex = ExtractNode::make(_phase->C, def, def_pos, velt_basic_type(def)); |
6803 | 1545 _igvn.register_new_node_with_optimizer(ex); |
0 | 1546 _phase->set_ctrl(ex, _phase->get_ctrl(def)); |
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1547 _igvn.replace_input_of(use, idx, ex); |
0 | 1548 _igvn._worklist.push(def); |
1549 | |
1550 bb_insert_after(ex, bb_idx(def)); | |
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1551 set_velt_type(ex, velt_type(def)); |
0 | 1552 } |
1553 } | |
1554 | |
1555 //------------------------------is_vector_use--------------------------- | |
1556 // Is use->in(u_idx) a vector use? | |
1557 bool SuperWord::is_vector_use(Node* use, int u_idx) { | |
1558 Node_List* u_pk = my_pack(use); | |
1559 if (u_pk == NULL) return false; | |
1560 Node* def = use->in(u_idx); | |
1561 Node_List* d_pk = my_pack(def); | |
1562 if (d_pk == NULL) { | |
1563 // check for scalar promotion | |
1564 Node* n = u_pk->at(0)->in(u_idx); | |
1565 for (uint i = 1; i < u_pk->size(); i++) { | |
1566 if (u_pk->at(i)->in(u_idx) != n) return false; | |
1567 } | |
1568 return true; | |
1569 } | |
1570 if (u_pk->size() != d_pk->size()) | |
1571 return false; | |
1572 for (uint i = 0; i < u_pk->size(); i++) { | |
1573 Node* ui = u_pk->at(i); | |
1574 Node* di = d_pk->at(i); | |
1575 if (ui->in(u_idx) != di || alignment(ui) != alignment(di)) | |
1576 return false; | |
1577 } | |
1578 return true; | |
1579 } | |
1580 | |
1581 //------------------------------construct_bb--------------------------- | |
1582 // Construct reverse postorder list of block members | |
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1583 bool SuperWord::construct_bb() { |
0 | 1584 Node* entry = bb(); |
1585 | |
1586 assert(_stk.length() == 0, "stk is empty"); | |
1587 assert(_block.length() == 0, "block is empty"); | |
1588 assert(_data_entry.length() == 0, "data_entry is empty"); | |
1589 assert(_mem_slice_head.length() == 0, "mem_slice_head is empty"); | |
1590 assert(_mem_slice_tail.length() == 0, "mem_slice_tail is empty"); | |
1591 | |
1592 // Find non-control nodes with no inputs from within block, | |
1593 // create a temporary map from node _idx to bb_idx for use | |
1594 // by the visited and post_visited sets, | |
1595 // and count number of nodes in block. | |
1596 int bb_ct = 0; | |
1597 for (uint i = 0; i < lpt()->_body.size(); i++ ) { | |
1598 Node *n = lpt()->_body.at(i); | |
1599 set_bb_idx(n, i); // Create a temporary map | |
1600 if (in_bb(n)) { | |
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1601 if (n->is_LoadStore() || n->is_MergeMem() || |
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1602 (n->is_Proj() && !n->as_Proj()->is_CFG())) { |
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1603 // Bailout if the loop has LoadStore, MergeMem or data Proj |
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1604 // nodes. Superword optimization does not work with them. |
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1605 return false; |
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1606 } |
0 | 1607 bb_ct++; |
1608 if (!n->is_CFG()) { | |
1609 bool found = false; | |
1610 for (uint j = 0; j < n->req(); j++) { | |
1611 Node* def = n->in(j); | |
1612 if (def && in_bb(def)) { | |
1613 found = true; | |
1614 break; | |
1615 } | |
1616 } | |
1617 if (!found) { | |
1618 assert(n != entry, "can't be entry"); | |
1619 _data_entry.push(n); | |
1620 } | |
1621 } | |
1622 } | |
1623 } | |
1624 | |
1625 // Find memory slices (head and tail) | |
1626 for (DUIterator_Fast imax, i = lp()->fast_outs(imax); i < imax; i++) { | |
1627 Node *n = lp()->fast_out(i); | |
1628 if (in_bb(n) && (n->is_Phi() && n->bottom_type() == Type::MEMORY)) { | |
1629 Node* n_tail = n->in(LoopNode::LoopBackControl); | |
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1630 if (n_tail != n->in(LoopNode::EntryControl)) { |
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1631 if (!n_tail->is_Mem()) { |
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1632 assert(n_tail->is_Mem(), err_msg_res("unexpected node for memory slice: %s", n_tail->Name())); |
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1633 return false; // Bailout |
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1634 } |
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1635 _mem_slice_head.push(n); |
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1636 _mem_slice_tail.push(n_tail); |
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1637 } |
0 | 1638 } |
1639 } | |
1640 | |
1641 // Create an RPO list of nodes in block | |
1642 | |
1643 visited_clear(); | |
1644 post_visited_clear(); | |
1645 | |
1646 // Push all non-control nodes with no inputs from within block, then control entry | |
1647 for (int j = 0; j < _data_entry.length(); j++) { | |
1648 Node* n = _data_entry.at(j); | |
1649 visited_set(n); | |
1650 _stk.push(n); | |
1651 } | |
1652 visited_set(entry); | |
1653 _stk.push(entry); | |
1654 | |
1655 // Do a depth first walk over out edges | |
1656 int rpo_idx = bb_ct - 1; | |
1657 int size; | |
1658 while ((size = _stk.length()) > 0) { | |
1659 Node* n = _stk.top(); // Leave node on stack | |
1660 if (!visited_test_set(n)) { | |
1661 // forward arc in graph | |
1662 } else if (!post_visited_test(n)) { | |
1663 // cross or back arc | |
1664 for (DUIterator_Fast imax, i = n->fast_outs(imax); i < imax; i++) { | |
1665 Node *use = n->fast_out(i); | |
1666 if (in_bb(use) && !visited_test(use) && | |
1667 // Don't go around backedge | |
1668 (!use->is_Phi() || n == entry)) { | |
1669 _stk.push(use); | |
1670 } | |
1671 } | |
1672 if (_stk.length() == size) { | |
1673 // There were no additional uses, post visit node now | |
1674 _stk.pop(); // Remove node from stack | |
1675 assert(rpo_idx >= 0, ""); | |
1676 _block.at_put_grow(rpo_idx, n); | |
1677 rpo_idx--; | |
1678 post_visited_set(n); | |
1679 assert(rpo_idx >= 0 || _stk.is_empty(), ""); | |
1680 } | |
1681 } else { | |
1682 _stk.pop(); // Remove post-visited node from stack | |
1683 } | |
1684 } | |
1685 | |
1686 // Create real map of block indices for nodes | |
1687 for (int j = 0; j < _block.length(); j++) { | |
1688 Node* n = _block.at(j); | |
1689 set_bb_idx(n, j); | |
1690 } | |
1691 | |
1692 initialize_bb(); // Ensure extra info is allocated. | |
1693 | |
1694 #ifndef PRODUCT | |
1695 if (TraceSuperWord) { | |
1696 print_bb(); | |
1697 tty->print_cr("\ndata entry nodes: %s", _data_entry.length() > 0 ? "" : "NONE"); | |
1698 for (int m = 0; m < _data_entry.length(); m++) { | |
1699 tty->print("%3d ", m); | |
1700 _data_entry.at(m)->dump(); | |
1701 } | |
1702 tty->print_cr("\nmemory slices: %s", _mem_slice_head.length() > 0 ? "" : "NONE"); | |
1703 for (int m = 0; m < _mem_slice_head.length(); m++) { | |
1704 tty->print("%3d ", m); _mem_slice_head.at(m)->dump(); | |
1705 tty->print(" "); _mem_slice_tail.at(m)->dump(); | |
1706 } | |
1707 } | |
1708 #endif | |
1709 assert(rpo_idx == -1 && bb_ct == _block.length(), "all block members found"); | |
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1710 return (_mem_slice_head.length() > 0) || (_data_entry.length() > 0); |
0 | 1711 } |
1712 | |
1713 //------------------------------initialize_bb--------------------------- | |
1714 // Initialize per node info | |
1715 void SuperWord::initialize_bb() { | |
1716 Node* last = _block.at(_block.length() - 1); | |
1717 grow_node_info(bb_idx(last)); | |
1718 } | |
1719 | |
1720 //------------------------------bb_insert_after--------------------------- | |
1721 // Insert n into block after pos | |
1722 void SuperWord::bb_insert_after(Node* n, int pos) { | |
1723 int n_pos = pos + 1; | |
1724 // Make room | |
1725 for (int i = _block.length() - 1; i >= n_pos; i--) { | |
1726 _block.at_put_grow(i+1, _block.at(i)); | |
1727 } | |
1728 for (int j = _node_info.length() - 1; j >= n_pos; j--) { | |
1729 _node_info.at_put_grow(j+1, _node_info.at(j)); | |
1730 } | |
1731 // Set value | |
1732 _block.at_put_grow(n_pos, n); | |
1733 _node_info.at_put_grow(n_pos, SWNodeInfo::initial); | |
1734 // Adjust map from node->_idx to _block index | |
1735 for (int i = n_pos; i < _block.length(); i++) { | |
1736 set_bb_idx(_block.at(i), i); | |
1737 } | |
1738 } | |
1739 | |
1740 //------------------------------compute_max_depth--------------------------- | |
1741 // Compute max depth for expressions from beginning of block | |
1742 // Use to prune search paths during test for independence. | |
1743 void SuperWord::compute_max_depth() { | |
1744 int ct = 0; | |
1745 bool again; | |
1746 do { | |
1747 again = false; | |
1748 for (int i = 0; i < _block.length(); i++) { | |
1749 Node* n = _block.at(i); | |
1750 if (!n->is_Phi()) { | |
1751 int d_orig = depth(n); | |
1752 int d_in = 0; | |
1753 for (DepPreds preds(n, _dg); !preds.done(); preds.next()) { | |
1754 Node* pred = preds.current(); | |
1755 if (in_bb(pred)) { | |
1756 d_in = MAX2(d_in, depth(pred)); | |
1757 } | |
1758 } | |
1759 if (d_in + 1 != d_orig) { | |
1760 set_depth(n, d_in + 1); | |
1761 again = true; | |
1762 } | |
1763 } | |
1764 } | |
1765 ct++; | |
1766 } while (again); | |
1767 #ifndef PRODUCT | |
1768 if (TraceSuperWord && Verbose) | |
1769 tty->print_cr("compute_max_depth iterated: %d times", ct); | |
1770 #endif | |
1771 } | |
1772 | |
1773 //-------------------------compute_vector_element_type----------------------- | |
1774 // Compute necessary vector element type for expressions | |
1775 // This propagates backwards a narrower integer type when the | |
1776 // upper bits of the value are not needed. | |
1777 // Example: char a,b,c; a = b + c; | |
1778 // Normally the type of the add is integer, but for packed character | |
1779 // operations the type of the add needs to be char. | |
1780 void SuperWord::compute_vector_element_type() { | |
1781 #ifndef PRODUCT | |
1782 if (TraceSuperWord && Verbose) | |
1783 tty->print_cr("\ncompute_velt_type:"); | |
1784 #endif | |
1785 | |
1786 // Initial type | |
1787 for (int i = 0; i < _block.length(); i++) { | |
1788 Node* n = _block.at(i); | |
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1789 set_velt_type(n, container_type(n)); |
0 | 1790 } |
1791 | |
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1792 // Propagate integer narrowed type backwards through operations |
0 | 1793 // that don't depend on higher order bits |
1794 for (int i = _block.length() - 1; i >= 0; i--) { | |
1795 Node* n = _block.at(i); | |
1796 // Only integer types need be examined | |
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1797 const Type* vtn = velt_type(n); |
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1798 if (vtn->basic_type() == T_INT) { |
0 | 1799 uint start, end; |
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1800 VectorNode::vector_operands(n, &start, &end); |
0 | 1801 |
1802 for (uint j = start; j < end; j++) { | |
1803 Node* in = n->in(j); | |
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1804 // Don't propagate through a memory |
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1805 if (!in->is_Mem() && in_bb(in) && velt_type(in)->basic_type() == T_INT && |
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1806 data_size(n) < data_size(in)) { |
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1807 bool same_type = true; |
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1808 for (DUIterator_Fast kmax, k = in->fast_outs(kmax); k < kmax; k++) { |
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1809 Node *use = in->fast_out(k); |
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1810 if (!in_bb(use) || !same_velt_type(use, n)) { |
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1811 same_type = false; |
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1812 break; |
0 | 1813 } |
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1814 } |
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1815 if (same_type) { |
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1816 // For right shifts of small integer types (bool, byte, char, short) |
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1817 // we need precise information about sign-ness. Only Load nodes have |
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1818 // this information because Store nodes are the same for signed and |
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1819 // unsigned values. And any arithmetic operation after a load may |
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1820 // expand a value to signed Int so such right shifts can't be used |
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1821 // because vector elements do not have upper bits of Int. |
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1822 const Type* vt = vtn; |
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1823 if (VectorNode::is_shift(in)) { |
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1824 Node* load = in->in(1); |
6896 | 1825 if (load->is_Load() && in_bb(load) && (velt_type(load)->basic_type() == T_INT)) { |
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1826 vt = velt_type(load); |
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1827 } else if (in->Opcode() != Op_LShiftI) { |
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1828 // Widen type to Int to avoid creation of right shift vector |
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1829 // (align + data_size(s1) check in stmts_can_pack() will fail). |
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1830 // Note, left shifts work regardless type. |
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1831 vt = TypeInt::INT; |
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1832 } |
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1833 } |
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1834 set_velt_type(in, vt); |
0 | 1835 } |
1836 } | |
1837 } | |
1838 } | |
1839 } | |
1840 #ifndef PRODUCT | |
1841 if (TraceSuperWord && Verbose) { | |
1842 for (int i = 0; i < _block.length(); i++) { | |
1843 Node* n = _block.at(i); | |
1844 velt_type(n)->dump(); | |
1845 tty->print("\t"); | |
1846 n->dump(); | |
1847 } | |
1848 } | |
1849 #endif | |
1850 } | |
1851 | |
1852 //------------------------------memory_alignment--------------------------- | |
1853 // Alignment within a vector memory reference | |
6794 | 1854 int SuperWord::memory_alignment(MemNode* s, int iv_adjust) { |
0 | 1855 SWPointer p(s, this); |
1856 if (!p.valid()) { | |
1857 return bottom_align; | |
1858 } | |
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1859 int vw = vector_width_in_bytes(s); |
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1860 if (vw < 2) { |
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1861 return bottom_align; // No vectors for this type |
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1862 } |
0 | 1863 int offset = p.offset_in_bytes(); |
6794 | 1864 offset += iv_adjust*p.memory_size(); |
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1865 int off_rem = offset % vw; |
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1866 int off_mod = off_rem >= 0 ? off_rem : off_rem + vw; |
0 | 1867 return off_mod; |
1868 } | |
1869 | |
1870 //---------------------------container_type--------------------------- | |
1871 // Smallest type containing range of values | |
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1872 const Type* SuperWord::container_type(Node* n) { |
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1873 if (n->is_Mem()) { |
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1874 BasicType bt = n->as_Mem()->memory_type(); |
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1875 if (n->is_Store() && (bt == T_CHAR)) { |
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1876 // Use T_SHORT type instead of T_CHAR for stored values because any |
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1877 // preceding arithmetic operation extends values to signed Int. |
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1878 bt = T_SHORT; |
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1879 } |
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1880 if (n->Opcode() == Op_LoadUB) { |
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1881 // Adjust type for unsigned byte loads, it is important for right shifts. |
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1882 // T_BOOLEAN is used because there is no basic type representing type |
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1883 // TypeInt::UBYTE. Use of T_BOOLEAN for vectors is fine because only |
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1884 // size (one byte) and sign is important. |
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1885 bt = T_BOOLEAN; |
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1886 } |
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1887 return Type::get_const_basic_type(bt); |
0 | 1888 } |
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1889 const Type* t = _igvn.type(n); |
0 | 1890 if (t->basic_type() == T_INT) { |
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1891 // A narrow type of arithmetic operations will be determined by |
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1892 // propagating the type of memory operations. |
0 | 1893 return TypeInt::INT; |
1894 } | |
1895 return t; | |
1896 } | |
1897 | |
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1898 bool SuperWord::same_velt_type(Node* n1, Node* n2) { |
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1899 const Type* vt1 = velt_type(n1); |
6794 | 1900 const Type* vt2 = velt_type(n2); |
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1901 if (vt1->basic_type() == T_INT && vt2->basic_type() == T_INT) { |
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1902 // Compare vectors element sizes for integer types. |
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1903 return data_size(n1) == data_size(n2); |
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1904 } |
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1905 return vt1 == vt2; |
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1906 } |
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1907 |
0 | 1908 //------------------------------in_packset--------------------------- |
1909 // Are s1 and s2 in a pack pair and ordered as s1,s2? | |
1910 bool SuperWord::in_packset(Node* s1, Node* s2) { | |
1911 for (int i = 0; i < _packset.length(); i++) { | |
1912 Node_List* p = _packset.at(i); | |
1913 assert(p->size() == 2, "must be"); | |
1914 if (p->at(0) == s1 && p->at(p->size()-1) == s2) { | |
1915 return true; | |
1916 } | |
1917 } | |
1918 return false; | |
1919 } | |
1920 | |
1921 //------------------------------in_pack--------------------------- | |
1922 // Is s in pack p? | |
1923 Node_List* SuperWord::in_pack(Node* s, Node_List* p) { | |
1924 for (uint i = 0; i < p->size(); i++) { | |
1925 if (p->at(i) == s) { | |
1926 return p; | |
1927 } | |
1928 } | |
1929 return NULL; | |
1930 } | |
1931 | |
1932 //------------------------------remove_pack_at--------------------------- | |
1933 // Remove the pack at position pos in the packset | |
1934 void SuperWord::remove_pack_at(int pos) { | |
1935 Node_List* p = _packset.at(pos); | |
1936 for (uint i = 0; i < p->size(); i++) { | |
1937 Node* s = p->at(i); | |
1938 set_my_pack(s, NULL); | |
1939 } | |
1940 _packset.remove_at(pos); | |
1941 } | |
1942 | |
1943 //------------------------------executed_first--------------------------- | |
1944 // Return the node executed first in pack p. Uses the RPO block list | |
1945 // to determine order. | |
1946 Node* SuperWord::executed_first(Node_List* p) { | |
1947 Node* n = p->at(0); | |
1948 int n_rpo = bb_idx(n); | |
1949 for (uint i = 1; i < p->size(); i++) { | |
1950 Node* s = p->at(i); | |
1951 int s_rpo = bb_idx(s); | |
1952 if (s_rpo < n_rpo) { | |
1953 n = s; | |
1954 n_rpo = s_rpo; | |
1955 } | |
1956 } | |
1957 return n; | |
1958 } | |
1959 | |
1960 //------------------------------executed_last--------------------------- | |
1961 // Return the node executed last in pack p. | |
1962 Node* SuperWord::executed_last(Node_List* p) { | |
1963 Node* n = p->at(0); | |
1964 int n_rpo = bb_idx(n); | |
1965 for (uint i = 1; i < p->size(); i++) { | |
1966 Node* s = p->at(i); | |
1967 int s_rpo = bb_idx(s); | |
1968 if (s_rpo > n_rpo) { | |
1969 n = s; | |
1970 n_rpo = s_rpo; | |
1971 } | |
1972 } | |
1973 return n; | |
1974 } | |
1975 | |
1976 //----------------------------align_initial_loop_index--------------------------- | |
1977 // Adjust pre-loop limit so that in main loop, a load/store reference | |
1978 // to align_to_ref will be a position zero in the vector. | |
1979 // (iv + k) mod vector_align == 0 | |
1980 void SuperWord::align_initial_loop_index(MemNode* align_to_ref) { | |
1981 CountedLoopNode *main_head = lp()->as_CountedLoop(); | |
1982 assert(main_head->is_main_loop(), ""); | |
1983 CountedLoopEndNode* pre_end = get_pre_loop_end(main_head); | |
1984 assert(pre_end != NULL, ""); | |
1985 Node *pre_opaq1 = pre_end->limit(); | |
1986 assert(pre_opaq1->Opcode() == Op_Opaque1, ""); | |
1987 Opaque1Node *pre_opaq = (Opaque1Node*)pre_opaq1; | |
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1988 Node *lim0 = pre_opaq->in(1); |
0 | 1989 |
1990 // Where we put new limit calculations | |
1991 Node *pre_ctrl = pre_end->loopnode()->in(LoopNode::EntryControl); | |
1992 | |
1993 // Ensure the original loop limit is available from the | |
1994 // pre-loop Opaque1 node. | |
1995 Node *orig_limit = pre_opaq->original_loop_limit(); | |
1996 assert(orig_limit != NULL && _igvn.type(orig_limit) != Type::TOP, ""); | |
1997 | |
1998 SWPointer align_to_ref_p(align_to_ref, this); | |
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1999 assert(align_to_ref_p.valid(), "sanity"); |
0 | 2000 |
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2001 // Given: |
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2002 // lim0 == original pre loop limit |
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2003 // V == v_align (power of 2) |
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2004 // invar == extra invariant piece of the address expression |
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2005 // e == offset [ +/- invar ] |
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2006 // |
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2007 // When reassociating expressions involving '%' the basic rules are: |
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2008 // (a - b) % k == 0 => a % k == b % k |
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2009 // and: |
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2010 // (a + b) % k == 0 => a % k == (k - b) % k |
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2011 // |
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2012 // For stride > 0 && scale > 0, |
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2013 // Derive the new pre-loop limit "lim" such that the two constraints: |
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2014 // (1) lim = lim0 + N (where N is some positive integer < V) |
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2015 // (2) (e + lim) % V == 0 |
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2016 // are true. |
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2017 // |
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2018 // Substituting (1) into (2), |
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2019 // (e + lim0 + N) % V == 0 |
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2020 // solve for N: |
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2021 // N = (V - (e + lim0)) % V |
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2022 // substitute back into (1), so that new limit |
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2023 // lim = lim0 + (V - (e + lim0)) % V |
0 | 2024 // |
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2025 // For stride > 0 && scale < 0 |
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2026 // Constraints: |
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2027 // lim = lim0 + N |
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2028 // (e - lim) % V == 0 |
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2029 // Solving for lim: |
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2030 // (e - lim0 - N) % V == 0 |
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2031 // N = (e - lim0) % V |
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2032 // lim = lim0 + (e - lim0) % V |
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2033 // |
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2034 // For stride < 0 && scale > 0 |
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2035 // Constraints: |
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2036 // lim = lim0 - N |
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2037 // (e + lim) % V == 0 |
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2038 // Solving for lim: |
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2039 // (e + lim0 - N) % V == 0 |
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2040 // N = (e + lim0) % V |
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2041 // lim = lim0 - (e + lim0) % V |
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2042 // |
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2043 // For stride < 0 && scale < 0 |
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2044 // Constraints: |
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2045 // lim = lim0 - N |
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2046 // (e - lim) % V == 0 |
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2047 // Solving for lim: |
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2048 // (e - lim0 + N) % V == 0 |
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2049 // N = (V - (e - lim0)) % V |
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2050 // lim = lim0 - (V - (e - lim0)) % V |
0 | 2051 |
6183
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2052 int vw = vector_width_in_bytes(align_to_ref); |
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2053 int stride = iv_stride(); |
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2054 int scale = align_to_ref_p.scale_in_bytes(); |
0 | 2055 int elt_size = align_to_ref_p.memory_size(); |
6179
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2056 int v_align = vw / elt_size; |
6183
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2057 assert(v_align > 1, "sanity"); |
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2058 int offset = align_to_ref_p.offset_in_bytes() / elt_size; |
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2059 Node *offsn = _igvn.intcon(offset); |
72
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2060 |
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2061 Node *e = offsn; |
0 | 2062 if (align_to_ref_p.invar() != NULL) { |
6614
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2063 // incorporate any extra invariant piece producing (offset +/- invar) >>> log2(elt) |
0 | 2064 Node* log2_elt = _igvn.intcon(exact_log2(elt_size)); |
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2065 Node* aref = new (_phase->C) URShiftINode(align_to_ref_p.invar(), log2_elt); |
6803 | 2066 _igvn.register_new_node_with_optimizer(aref); |
0 | 2067 _phase->set_ctrl(aref, pre_ctrl); |
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2068 if (align_to_ref_p.negate_invar()) { |
6804
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2069 e = new (_phase->C) SubINode(e, aref); |
0 | 2070 } else { |
6804
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2071 e = new (_phase->C) AddINode(e, aref); |
0 | 2072 } |
6803 | 2073 _igvn.register_new_node_with_optimizer(e); |
72
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2074 _phase->set_ctrl(e, pre_ctrl); |
0 | 2075 } |
6179
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2076 if (vw > ObjectAlignmentInBytes) { |
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2077 // incorporate base e +/- base && Mask >>> log2(elt) |
6804
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2078 Node* xbase = new(_phase->C) CastP2XNode(NULL, align_to_ref_p.base()); |
6803 | 2079 _igvn.register_new_node_with_optimizer(xbase); |
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2080 #ifdef _LP64 |
6804
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2081 xbase = new (_phase->C) ConvL2INode(xbase); |
6803 | 2082 _igvn.register_new_node_with_optimizer(xbase); |
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2083 #endif |
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2084 Node* mask = _igvn.intcon(vw-1); |
6804
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2085 Node* masked_xbase = new (_phase->C) AndINode(xbase, mask); |
6803 | 2086 _igvn.register_new_node_with_optimizer(masked_xbase); |
6179
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2087 Node* log2_elt = _igvn.intcon(exact_log2(elt_size)); |
6804
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2088 Node* bref = new (_phase->C) URShiftINode(masked_xbase, log2_elt); |
6803 | 2089 _igvn.register_new_node_with_optimizer(bref); |
6179
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2090 _phase->set_ctrl(bref, pre_ctrl); |
6804
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2091 e = new (_phase->C) AddINode(e, bref); |
6803 | 2092 _igvn.register_new_node_with_optimizer(e); |
6179
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2093 _phase->set_ctrl(e, pre_ctrl); |
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2094 } |
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2095 |
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|
2096 // compute e +/- lim0 |
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|
2097 if (scale < 0) { |
6804
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|
2098 e = new (_phase->C) SubINode(e, lim0); |
72
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|
2099 } else { |
6804
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|
2100 e = new (_phase->C) AddINode(e, lim0); |
72
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|
2101 } |
6803 | 2102 _igvn.register_new_node_with_optimizer(e); |
72
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2103 _phase->set_ctrl(e, pre_ctrl); |
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|
2104 |
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|
2105 if (stride * scale > 0) { |
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|
2106 // compute V - (e +/- lim0) |
0 | 2107 Node* va = _igvn.intcon(v_align); |
6804
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2108 e = new (_phase->C) SubINode(va, e); |
6803 | 2109 _igvn.register_new_node_with_optimizer(e); |
72
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2110 _phase->set_ctrl(e, pre_ctrl); |
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|
2111 } |
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|
2112 // compute N = (exp) % V |
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2113 Node* va_msk = _igvn.intcon(v_align - 1); |
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2114 Node* N = new (_phase->C) AndINode(e, va_msk); |
6803 | 2115 _igvn.register_new_node_with_optimizer(N); |
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|
2116 _phase->set_ctrl(N, pre_ctrl); |
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|
2117 |
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|
2118 // substitute back into (1), so that new limit |
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|
2119 // lim = lim0 + N |
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|
2120 Node* lim; |
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|
2121 if (stride < 0) { |
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|
2122 lim = new (_phase->C) SubINode(lim0, N); |
0 | 2123 } else { |
6804
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|
2124 lim = new (_phase->C) AddINode(lim0, N); |
0 | 2125 } |
6803 | 2126 _igvn.register_new_node_with_optimizer(lim); |
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|
2127 _phase->set_ctrl(lim, pre_ctrl); |
0 | 2128 Node* constrained = |
6804
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|
2129 (stride > 0) ? (Node*) new (_phase->C) MinINode(lim, orig_limit) |
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|
2130 : (Node*) new (_phase->C) MaxINode(lim, orig_limit); |
6803 | 2131 _igvn.register_new_node_with_optimizer(constrained); |
0 | 2132 _phase->set_ctrl(constrained, pre_ctrl); |
2133 _igvn.hash_delete(pre_opaq); | |
2134 pre_opaq->set_req(1, constrained); | |
2135 } | |
2136 | |
2137 //----------------------------get_pre_loop_end--------------------------- | |
2138 // Find pre loop end from main loop. Returns null if none. | |
2139 CountedLoopEndNode* SuperWord::get_pre_loop_end(CountedLoopNode *cl) { | |
2140 Node *ctrl = cl->in(LoopNode::EntryControl); | |
2141 if (!ctrl->is_IfTrue() && !ctrl->is_IfFalse()) return NULL; | |
2142 Node *iffm = ctrl->in(0); | |
2143 if (!iffm->is_If()) return NULL; | |
2144 Node *p_f = iffm->in(0); | |
2145 if (!p_f->is_IfFalse()) return NULL; | |
2146 if (!p_f->in(0)->is_CountedLoopEnd()) return NULL; | |
2147 CountedLoopEndNode *pre_end = p_f->in(0)->as_CountedLoopEnd(); | |
2148 if (!pre_end->loopnode()->is_pre_loop()) return NULL; | |
2149 return pre_end; | |
2150 } | |
2151 | |
2152 | |
2153 //------------------------------init--------------------------- | |
2154 void SuperWord::init() { | |
2155 _dg.init(); | |
2156 _packset.clear(); | |
2157 _disjoint_ptrs.clear(); | |
2158 _block.clear(); | |
2159 _data_entry.clear(); | |
2160 _mem_slice_head.clear(); | |
2161 _mem_slice_tail.clear(); | |
2162 _node_info.clear(); | |
2163 _align_to_ref = NULL; | |
2164 _lpt = NULL; | |
2165 _lp = NULL; | |
2166 _bb = NULL; | |
2167 _iv = NULL; | |
2168 } | |
2169 | |
2170 //------------------------------print_packset--------------------------- | |
2171 void SuperWord::print_packset() { | |
2172 #ifndef PRODUCT | |
2173 tty->print_cr("packset"); | |
2174 for (int i = 0; i < _packset.length(); i++) { | |
2175 tty->print_cr("Pack: %d", i); | |
2176 Node_List* p = _packset.at(i); | |
2177 print_pack(p); | |
2178 } | |
2179 #endif | |
2180 } | |
2181 | |
2182 //------------------------------print_pack--------------------------- | |
2183 void SuperWord::print_pack(Node_List* p) { | |
2184 for (uint i = 0; i < p->size(); i++) { | |
2185 print_stmt(p->at(i)); | |
2186 } | |
2187 } | |
2188 | |
2189 //------------------------------print_bb--------------------------- | |
2190 void SuperWord::print_bb() { | |
2191 #ifndef PRODUCT | |
2192 tty->print_cr("\nBlock"); | |
2193 for (int i = 0; i < _block.length(); i++) { | |
2194 Node* n = _block.at(i); | |
2195 tty->print("%d ", i); | |
2196 if (n) { | |
2197 n->dump(); | |
2198 } | |
2199 } | |
2200 #endif | |
2201 } | |
2202 | |
2203 //------------------------------print_stmt--------------------------- | |
2204 void SuperWord::print_stmt(Node* s) { | |
2205 #ifndef PRODUCT | |
2206 tty->print(" align: %d \t", alignment(s)); | |
2207 s->dump(); | |
2208 #endif | |
2209 } | |
2210 | |
2211 //------------------------------blank--------------------------- | |
2212 char* SuperWord::blank(uint depth) { | |
2213 static char blanks[101]; | |
2214 assert(depth < 101, "too deep"); | |
2215 for (uint i = 0; i < depth; i++) blanks[i] = ' '; | |
2216 blanks[depth] = '\0'; | |
2217 return blanks; | |
2218 } | |
2219 | |
2220 | |
2221 //==============================SWPointer=========================== | |
2222 | |
2223 //----------------------------SWPointer------------------------ | |
2224 SWPointer::SWPointer(MemNode* mem, SuperWord* slp) : | |
2225 _mem(mem), _slp(slp), _base(NULL), _adr(NULL), | |
2226 _scale(0), _offset(0), _invar(NULL), _negate_invar(false) { | |
2227 | |
2228 Node* adr = mem->in(MemNode::Address); | |
2229 if (!adr->is_AddP()) { | |
2230 assert(!valid(), "too complex"); | |
2231 return; | |
2232 } | |
2233 // Match AddP(base, AddP(ptr, k*iv [+ invariant]), constant) | |
2234 Node* base = adr->in(AddPNode::Base); | |
1058
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2235 //unsafe reference could not be aligned appropriately without runtime checking |
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2236 if (base == NULL || base->bottom_type() == Type::TOP) { |
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2237 assert(!valid(), "unsafe access"); |
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2238 return; |
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2239 } |
0 | 2240 for (int i = 0; i < 3; i++) { |
2241 if (!scaled_iv_plus_offset(adr->in(AddPNode::Offset))) { | |
2242 assert(!valid(), "too complex"); | |
2243 return; | |
2244 } | |
2245 adr = adr->in(AddPNode::Address); | |
2246 if (base == adr || !adr->is_AddP()) { | |
2247 break; // stop looking at addp's | |
2248 } | |
2249 } | |
2250 _base = base; | |
2251 _adr = adr; | |
2252 assert(valid(), "Usable"); | |
2253 } | |
2254 | |
2255 // Following is used to create a temporary object during | |
2256 // the pattern match of an address expression. | |
2257 SWPointer::SWPointer(SWPointer* p) : | |
2258 _mem(p->_mem), _slp(p->_slp), _base(NULL), _adr(NULL), | |
2259 _scale(0), _offset(0), _invar(NULL), _negate_invar(false) {} | |
2260 | |
2261 //------------------------scaled_iv_plus_offset-------------------- | |
2262 // Match: k*iv + offset | |
2263 // where: k is a constant that maybe zero, and | |
2264 // offset is (k2 [+/- invariant]) where k2 maybe zero and invariant is optional | |
2265 bool SWPointer::scaled_iv_plus_offset(Node* n) { | |
2266 if (scaled_iv(n)) { | |
2267 return true; | |
2268 } | |
2269 if (offset_plus_k(n)) { | |
2270 return true; | |
2271 } | |
2272 int opc = n->Opcode(); | |
2273 if (opc == Op_AddI) { | |
2274 if (scaled_iv(n->in(1)) && offset_plus_k(n->in(2))) { | |
2275 return true; | |
2276 } | |
2277 if (scaled_iv(n->in(2)) && offset_plus_k(n->in(1))) { | |
2278 return true; | |
2279 } | |
2280 } else if (opc == Op_SubI) { | |
2281 if (scaled_iv(n->in(1)) && offset_plus_k(n->in(2), true)) { | |
2282 return true; | |
2283 } | |
2284 if (scaled_iv(n->in(2)) && offset_plus_k(n->in(1))) { | |
2285 _scale *= -1; | |
2286 return true; | |
2287 } | |
2288 } | |
2289 return false; | |
2290 } | |
2291 | |
2292 //----------------------------scaled_iv------------------------ | |
2293 // Match: k*iv where k is a constant that's not zero | |
2294 bool SWPointer::scaled_iv(Node* n) { | |
2295 if (_scale != 0) { | |
2296 return false; // already found a scale | |
2297 } | |
2298 if (n == iv()) { | |
2299 _scale = 1; | |
2300 return true; | |
2301 } | |
2302 int opc = n->Opcode(); | |
2303 if (opc == Op_MulI) { | |
2304 if (n->in(1) == iv() && n->in(2)->is_Con()) { | |
2305 _scale = n->in(2)->get_int(); | |
2306 return true; | |
2307 } else if (n->in(2) == iv() && n->in(1)->is_Con()) { | |
2308 _scale = n->in(1)->get_int(); | |
2309 return true; | |
2310 } | |
2311 } else if (opc == Op_LShiftI) { | |
2312 if (n->in(1) == iv() && n->in(2)->is_Con()) { | |
2313 _scale = 1 << n->in(2)->get_int(); | |
2314 return true; | |
2315 } | |
2316 } else if (opc == Op_ConvI2L) { | |
2317 if (scaled_iv_plus_offset(n->in(1))) { | |
2318 return true; | |
2319 } | |
2320 } else if (opc == Op_LShiftL) { | |
2321 if (!has_iv() && _invar == NULL) { | |
2322 // Need to preserve the current _offset value, so | |
2323 // create a temporary object for this expression subtree. | |
2324 // Hacky, so should re-engineer the address pattern match. | |
2325 SWPointer tmp(this); | |
2326 if (tmp.scaled_iv_plus_offset(n->in(1))) { | |
2327 if (tmp._invar == NULL) { | |
2328 int mult = 1 << n->in(2)->get_int(); | |
2329 _scale = tmp._scale * mult; | |
2330 _offset += tmp._offset * mult; | |
2331 return true; | |
2332 } | |
2333 } | |
2334 } | |
2335 } | |
2336 return false; | |
2337 } | |
2338 | |
2339 //----------------------------offset_plus_k------------------------ | |
2340 // Match: offset is (k [+/- invariant]) | |
2341 // where k maybe zero and invariant is optional, but not both. | |
2342 bool SWPointer::offset_plus_k(Node* n, bool negate) { | |
2343 int opc = n->Opcode(); | |
2344 if (opc == Op_ConI) { | |
2345 _offset += negate ? -(n->get_int()) : n->get_int(); | |
2346 return true; | |
2347 } else if (opc == Op_ConL) { | |
2348 // Okay if value fits into an int | |
2349 const TypeLong* t = n->find_long_type(); | |
2350 if (t->higher_equal(TypeLong::INT)) { | |
2351 jlong loff = n->get_long(); | |
2352 jint off = (jint)loff; | |
2353 _offset += negate ? -off : loff; | |
2354 return true; | |
2355 } | |
2356 return false; | |
2357 } | |
2358 if (_invar != NULL) return false; // already have an invariant | |
2359 if (opc == Op_AddI) { | |
2360 if (n->in(2)->is_Con() && invariant(n->in(1))) { | |
2361 _negate_invar = negate; | |
2362 _invar = n->in(1); | |
2363 _offset += negate ? -(n->in(2)->get_int()) : n->in(2)->get_int(); | |
2364 return true; | |
2365 } else if (n->in(1)->is_Con() && invariant(n->in(2))) { | |
2366 _offset += negate ? -(n->in(1)->get_int()) : n->in(1)->get_int(); | |
2367 _negate_invar = negate; | |
2368 _invar = n->in(2); | |
2369 return true; | |
2370 } | |
2371 } | |
2372 if (opc == Op_SubI) { | |
2373 if (n->in(2)->is_Con() && invariant(n->in(1))) { | |
2374 _negate_invar = negate; | |
2375 _invar = n->in(1); | |
2376 _offset += !negate ? -(n->in(2)->get_int()) : n->in(2)->get_int(); | |
2377 return true; | |
2378 } else if (n->in(1)->is_Con() && invariant(n->in(2))) { | |
2379 _offset += negate ? -(n->in(1)->get_int()) : n->in(1)->get_int(); | |
2380 _negate_invar = !negate; | |
2381 _invar = n->in(2); | |
2382 return true; | |
2383 } | |
2384 } | |
2385 if (invariant(n)) { | |
2386 _negate_invar = negate; | |
2387 _invar = n; | |
2388 return true; | |
2389 } | |
2390 return false; | |
2391 } | |
2392 | |
2393 //----------------------------print------------------------ | |
2394 void SWPointer::print() { | |
2395 #ifndef PRODUCT | |
2396 tty->print("base: %d adr: %d scale: %d offset: %d invar: %c%d\n", | |
2397 _base != NULL ? _base->_idx : 0, | |
2398 _adr != NULL ? _adr->_idx : 0, | |
2399 _scale, _offset, | |
2400 _negate_invar?'-':'+', | |
2401 _invar != NULL ? _invar->_idx : 0); | |
2402 #endif | |
2403 } | |
2404 | |
2405 // ========================= OrderedPair ===================== | |
2406 | |
2407 const OrderedPair OrderedPair::initial; | |
2408 | |
2409 // ========================= SWNodeInfo ===================== | |
2410 | |
2411 const SWNodeInfo SWNodeInfo::initial; | |
2412 | |
2413 | |
2414 // ============================ DepGraph =========================== | |
2415 | |
2416 //------------------------------make_node--------------------------- | |
2417 // Make a new dependence graph node for an ideal node. | |
2418 DepMem* DepGraph::make_node(Node* node) { | |
2419 DepMem* m = new (_arena) DepMem(node); | |
2420 if (node != NULL) { | |
2421 assert(_map.at_grow(node->_idx) == NULL, "one init only"); | |
2422 _map.at_put_grow(node->_idx, m); | |
2423 } | |
2424 return m; | |
2425 } | |
2426 | |
2427 //------------------------------make_edge--------------------------- | |
2428 // Make a new dependence graph edge from dpred -> dsucc | |
2429 DepEdge* DepGraph::make_edge(DepMem* dpred, DepMem* dsucc) { | |
2430 DepEdge* e = new (_arena) DepEdge(dpred, dsucc, dsucc->in_head(), dpred->out_head()); | |
2431 dpred->set_out_head(e); | |
2432 dsucc->set_in_head(e); | |
2433 return e; | |
2434 } | |
2435 | |
2436 // ========================== DepMem ======================== | |
2437 | |
2438 //------------------------------in_cnt--------------------------- | |
2439 int DepMem::in_cnt() { | |
2440 int ct = 0; | |
2441 for (DepEdge* e = _in_head; e != NULL; e = e->next_in()) ct++; | |
2442 return ct; | |
2443 } | |
2444 | |
2445 //------------------------------out_cnt--------------------------- | |
2446 int DepMem::out_cnt() { | |
2447 int ct = 0; | |
2448 for (DepEdge* e = _out_head; e != NULL; e = e->next_out()) ct++; | |
2449 return ct; | |
2450 } | |
2451 | |
2452 //------------------------------print----------------------------- | |
2453 void DepMem::print() { | |
2454 #ifndef PRODUCT | |
2455 tty->print(" DepNode %d (", _node->_idx); | |
2456 for (DepEdge* p = _in_head; p != NULL; p = p->next_in()) { | |
2457 Node* pred = p->pred()->node(); | |
2458 tty->print(" %d", pred != NULL ? pred->_idx : 0); | |
2459 } | |
2460 tty->print(") ["); | |
2461 for (DepEdge* s = _out_head; s != NULL; s = s->next_out()) { | |
2462 Node* succ = s->succ()->node(); | |
2463 tty->print(" %d", succ != NULL ? succ->_idx : 0); | |
2464 } | |
2465 tty->print_cr(" ]"); | |
2466 #endif | |
2467 } | |
2468 | |
2469 // =========================== DepEdge ========================= | |
2470 | |
2471 //------------------------------DepPreds--------------------------- | |
2472 void DepEdge::print() { | |
2473 #ifndef PRODUCT | |
2474 tty->print_cr("DepEdge: %d [ %d ]", _pred->node()->_idx, _succ->node()->_idx); | |
2475 #endif | |
2476 } | |
2477 | |
2478 // =========================== DepPreds ========================= | |
2479 // Iterator over predecessor edges in the dependence graph. | |
2480 | |
2481 //------------------------------DepPreds--------------------------- | |
2482 DepPreds::DepPreds(Node* n, DepGraph& dg) { | |
2483 _n = n; | |
2484 _done = false; | |
2485 if (_n->is_Store() || _n->is_Load()) { | |
2486 _next_idx = MemNode::Address; | |
2487 _end_idx = n->req(); | |
2488 _dep_next = dg.dep(_n)->in_head(); | |
2489 } else if (_n->is_Mem()) { | |
2490 _next_idx = 0; | |
2491 _end_idx = 0; | |
2492 _dep_next = dg.dep(_n)->in_head(); | |
2493 } else { | |
2494 _next_idx = 1; | |
2495 _end_idx = _n->req(); | |
2496 _dep_next = NULL; | |
2497 } | |
2498 next(); | |
2499 } | |
2500 | |
2501 //------------------------------next--------------------------- | |
2502 void DepPreds::next() { | |
2503 if (_dep_next != NULL) { | |
2504 _current = _dep_next->pred()->node(); | |
2505 _dep_next = _dep_next->next_in(); | |
2506 } else if (_next_idx < _end_idx) { | |
2507 _current = _n->in(_next_idx++); | |
2508 } else { | |
2509 _done = true; | |
2510 } | |
2511 } | |
2512 | |
2513 // =========================== DepSuccs ========================= | |
2514 // Iterator over successor edges in the dependence graph. | |
2515 | |
2516 //------------------------------DepSuccs--------------------------- | |
2517 DepSuccs::DepSuccs(Node* n, DepGraph& dg) { | |
2518 _n = n; | |
2519 _done = false; | |
2520 if (_n->is_Load()) { | |
2521 _next_idx = 0; | |
2522 _end_idx = _n->outcnt(); | |
2523 _dep_next = dg.dep(_n)->out_head(); | |
2524 } else if (_n->is_Mem() || _n->is_Phi() && _n->bottom_type() == Type::MEMORY) { | |
2525 _next_idx = 0; | |
2526 _end_idx = 0; | |
2527 _dep_next = dg.dep(_n)->out_head(); | |
2528 } else { | |
2529 _next_idx = 0; | |
2530 _end_idx = _n->outcnt(); | |
2531 _dep_next = NULL; | |
2532 } | |
2533 next(); | |
2534 } | |
2535 | |
2536 //-------------------------------next--------------------------- | |
2537 void DepSuccs::next() { | |
2538 if (_dep_next != NULL) { | |
2539 _current = _dep_next->succ()->node(); | |
2540 _dep_next = _dep_next->next_out(); | |
2541 } else if (_next_idx < _end_idx) { | |
2542 _current = _n->raw_out(_next_idx++); | |
2543 } else { | |
2544 _done = true; | |
2545 } | |
2546 } |