Mercurial > hg > truffle
annotate src/share/vm/opto/escape.cpp @ 4058:59e515ee9354
7059047: EA: can't find initializing store with several CheckCastPP
Summary: Split adjust_escape_state() method into two methods to find initializing stores.
Reviewed-by: never
| author | kvn |
|---|---|
| date | Mon, 07 Nov 2011 14:33:57 -0800 |
| parents | e69a66a1457b |
| children | 8c57262447d3 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2249 | 2 * Copyright (c) 2005, 2011, 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 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "ci/bcEscapeAnalyzer.hpp" | |
| 27 #include "libadt/vectset.hpp" | |
| 28 #include "memory/allocation.hpp" | |
| 29 #include "opto/c2compiler.hpp" | |
| 30 #include "opto/callnode.hpp" | |
| 31 #include "opto/cfgnode.hpp" | |
| 32 #include "opto/compile.hpp" | |
| 33 #include "opto/escape.hpp" | |
| 34 #include "opto/phaseX.hpp" | |
| 35 #include "opto/rootnode.hpp" | |
| 0 | 36 |
| 37 void PointsToNode::add_edge(uint targIdx, PointsToNode::EdgeType et) { | |
| 38 uint v = (targIdx << EdgeShift) + ((uint) et); | |
| 39 if (_edges == NULL) { | |
| 40 Arena *a = Compile::current()->comp_arena(); | |
| 41 _edges = new(a) GrowableArray<uint>(a, INITIAL_EDGE_COUNT, 0, 0); | |
| 42 } | |
| 43 _edges->append_if_missing(v); | |
| 44 } | |
| 45 | |
| 46 void PointsToNode::remove_edge(uint targIdx, PointsToNode::EdgeType et) { | |
| 47 uint v = (targIdx << EdgeShift) + ((uint) et); | |
| 48 | |
| 49 _edges->remove(v); | |
| 50 } | |
| 51 | |
| 52 #ifndef PRODUCT | |
| 77 | 53 static const char *node_type_names[] = { |
| 0 | 54 "UnknownType", |
| 55 "JavaObject", | |
| 56 "LocalVar", | |
| 57 "Field" | |
| 58 }; | |
| 59 | |
| 77 | 60 static const char *esc_names[] = { |
| 0 | 61 "UnknownEscape", |
| 65 | 62 "NoEscape", |
| 63 "ArgEscape", | |
| 64 "GlobalEscape" | |
| 0 | 65 }; |
| 66 | |
| 77 | 67 static const char *edge_type_suffix[] = { |
| 0 | 68 "?", // UnknownEdge |
| 69 "P", // PointsToEdge | |
| 70 "D", // DeferredEdge | |
| 71 "F" // FieldEdge | |
| 72 }; | |
| 73 | |
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74 void PointsToNode::dump(bool print_state) const { |
| 0 | 75 NodeType nt = node_type(); |
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76 tty->print("%s ", node_type_names[(int) nt]); |
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77 if (print_state) { |
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78 EscapeState es = escape_state(); |
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79 tty->print("%s %s ", esc_names[(int) es], _scalar_replaceable ? "":"NSR"); |
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80 } |
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81 tty->print("[["); |
| 0 | 82 for (uint i = 0; i < edge_count(); i++) { |
| 83 tty->print(" %d%s", edge_target(i), edge_type_suffix[(int) edge_type(i)]); | |
| 84 } | |
| 85 tty->print("]] "); | |
| 86 if (_node == NULL) | |
| 87 tty->print_cr("<null>"); | |
| 88 else | |
| 89 _node->dump(); | |
| 90 } | |
| 91 #endif | |
| 92 | |
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93 ConnectionGraph::ConnectionGraph(Compile * C, PhaseIterGVN *igvn) : |
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94 _nodes(C->comp_arena(), C->unique(), C->unique(), PointsToNode()), |
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95 _processed(C->comp_arena()), |
| 2249 | 96 pt_ptset(C->comp_arena()), |
| 97 pt_visited(C->comp_arena()), | |
| 98 pt_worklist(C->comp_arena(), 4, 0, 0), | |
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99 _collecting(true), |
| 1921 | 100 _progress(false), |
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101 _compile(C), |
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102 _igvn(igvn), |
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103 _node_map(C->comp_arena()) { |
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104 |
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105 _phantom_object = C->top()->_idx, |
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106 add_node(C->top(), PointsToNode::JavaObject, PointsToNode::GlobalEscape,true); |
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107 |
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108 // Add ConP(#NULL) and ConN(#NULL) nodes. |
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109 Node* oop_null = igvn->zerocon(T_OBJECT); |
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110 _oop_null = oop_null->_idx; |
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111 assert(_oop_null < nodes_size(), "should be created already"); |
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112 add_node(oop_null, PointsToNode::JavaObject, PointsToNode::NoEscape, true); |
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113 |
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114 if (UseCompressedOops) { |
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115 Node* noop_null = igvn->zerocon(T_NARROWOOP); |
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116 _noop_null = noop_null->_idx; |
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117 assert(_noop_null < nodes_size(), "should be created already"); |
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118 add_node(noop_null, PointsToNode::JavaObject, PointsToNode::NoEscape, true); |
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119 } else { |
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120 _noop_null = _oop_null; // Should be initialized |
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121 } |
| 0 | 122 } |
| 123 | |
| 124 void ConnectionGraph::add_pointsto_edge(uint from_i, uint to_i) { | |
| 125 PointsToNode *f = ptnode_adr(from_i); | |
| 126 PointsToNode *t = ptnode_adr(to_i); | |
| 127 | |
| 128 assert(f->node_type() != PointsToNode::UnknownType && t->node_type() != PointsToNode::UnknownType, "node types must be set"); | |
| 129 assert(f->node_type() == PointsToNode::LocalVar || f->node_type() == PointsToNode::Field, "invalid source of PointsTo edge"); | |
| 130 assert(t->node_type() == PointsToNode::JavaObject, "invalid destination of PointsTo edge"); | |
| 1921 | 131 add_edge(f, to_i, PointsToNode::PointsToEdge); |
| 0 | 132 } |
| 133 | |
| 134 void ConnectionGraph::add_deferred_edge(uint from_i, uint to_i) { | |
| 135 PointsToNode *f = ptnode_adr(from_i); | |
| 136 PointsToNode *t = ptnode_adr(to_i); | |
| 137 | |
| 138 assert(f->node_type() != PointsToNode::UnknownType && t->node_type() != PointsToNode::UnknownType, "node types must be set"); | |
| 139 assert(f->node_type() == PointsToNode::LocalVar || f->node_type() == PointsToNode::Field, "invalid source of Deferred edge"); | |
| 140 assert(t->node_type() == PointsToNode::LocalVar || t->node_type() == PointsToNode::Field, "invalid destination of Deferred edge"); | |
| 141 // don't add a self-referential edge, this can occur during removal of | |
| 142 // deferred edges | |
| 143 if (from_i != to_i) | |
| 1921 | 144 add_edge(f, to_i, PointsToNode::DeferredEdge); |
| 0 | 145 } |
| 146 | |
| 65 | 147 int ConnectionGraph::address_offset(Node* adr, PhaseTransform *phase) { |
| 148 const Type *adr_type = phase->type(adr); | |
| 149 if (adr->is_AddP() && adr_type->isa_oopptr() == NULL && | |
| 150 adr->in(AddPNode::Address)->is_Proj() && | |
| 151 adr->in(AddPNode::Address)->in(0)->is_Allocate()) { | |
| 152 // We are computing a raw address for a store captured by an Initialize | |
| 153 // compute an appropriate address type. AddP cases #3 and #5 (see below). | |
| 154 int offs = (int)phase->find_intptr_t_con(adr->in(AddPNode::Offset), Type::OffsetBot); | |
| 155 assert(offs != Type::OffsetBot || | |
| 156 adr->in(AddPNode::Address)->in(0)->is_AllocateArray(), | |
| 157 "offset must be a constant or it is initialization of array"); | |
| 158 return offs; | |
| 159 } | |
| 160 const TypePtr *t_ptr = adr_type->isa_ptr(); | |
| 0 | 161 assert(t_ptr != NULL, "must be a pointer type"); |
| 162 return t_ptr->offset(); | |
| 163 } | |
| 164 | |
| 165 void ConnectionGraph::add_field_edge(uint from_i, uint to_i, int offset) { | |
| 166 PointsToNode *f = ptnode_adr(from_i); | |
| 167 PointsToNode *t = ptnode_adr(to_i); | |
| 168 | |
| 169 assert(f->node_type() != PointsToNode::UnknownType && t->node_type() != PointsToNode::UnknownType, "node types must be set"); | |
| 170 assert(f->node_type() == PointsToNode::JavaObject, "invalid destination of Field edge"); | |
| 171 assert(t->node_type() == PointsToNode::Field, "invalid destination of Field edge"); | |
| 172 assert (t->offset() == -1 || t->offset() == offset, "conflicting field offsets"); | |
| 173 t->set_offset(offset); | |
| 174 | |
| 1921 | 175 add_edge(f, to_i, PointsToNode::FieldEdge); |
| 0 | 176 } |
| 177 | |
| 178 void ConnectionGraph::set_escape_state(uint ni, PointsToNode::EscapeState es) { | |
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179 // Don't change non-escaping state of NULL pointer. |
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180 if (ni == _noop_null || ni == _oop_null) |
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181 return; |
| 0 | 182 PointsToNode *npt = ptnode_adr(ni); |
| 183 PointsToNode::EscapeState old_es = npt->escape_state(); | |
| 184 if (es > old_es) | |
| 185 npt->set_escape_state(es); | |
| 186 } | |
| 187 | |
| 65 | 188 void ConnectionGraph::add_node(Node *n, PointsToNode::NodeType nt, |
| 189 PointsToNode::EscapeState es, bool done) { | |
| 190 PointsToNode* ptadr = ptnode_adr(n->_idx); | |
| 191 ptadr->_node = n; | |
| 192 ptadr->set_node_type(nt); | |
| 193 | |
| 194 // inline set_escape_state(idx, es); | |
| 195 PointsToNode::EscapeState old_es = ptadr->escape_state(); | |
| 196 if (es > old_es) | |
| 197 ptadr->set_escape_state(es); | |
| 198 | |
| 199 if (done) | |
| 200 _processed.set(n->_idx); | |
| 201 } | |
| 202 | |
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203 PointsToNode::EscapeState ConnectionGraph::escape_state(Node *n) { |
| 0 | 204 uint idx = n->_idx; |
| 205 PointsToNode::EscapeState es; | |
| 206 | |
| 65 | 207 // If we are still collecting or there were no non-escaping allocations |
| 208 // we don't know the answer yet | |
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209 if (_collecting) |
| 0 | 210 return PointsToNode::UnknownEscape; |
| 211 | |
| 212 // if the node was created after the escape computation, return | |
| 213 // UnknownEscape | |
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214 if (idx >= nodes_size()) |
| 0 | 215 return PointsToNode::UnknownEscape; |
| 216 | |
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217 es = ptnode_adr(idx)->escape_state(); |
| 0 | 218 |
| 219 // if we have already computed a value, return it | |
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220 if (es != PointsToNode::UnknownEscape && |
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221 ptnode_adr(idx)->node_type() == PointsToNode::JavaObject) |
| 0 | 222 return es; |
| 223 | |
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224 // PointsTo() calls n->uncast() which can return a new ideal node. |
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225 if (n->uncast()->_idx >= nodes_size()) |
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226 return PointsToNode::UnknownEscape; |
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227 |
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228 PointsToNode::EscapeState orig_es = es; |
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229 |
| 0 | 230 // compute max escape state of anything this node could point to |
| 2249 | 231 for(VectorSetI i(PointsTo(n)); i.test() && es != PointsToNode::GlobalEscape; ++i) { |
| 0 | 232 uint pt = i.elem; |
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233 PointsToNode::EscapeState pes = ptnode_adr(pt)->escape_state(); |
| 0 | 234 if (pes > es) |
| 235 es = pes; | |
| 236 } | |
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237 if (orig_es != es) { |
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238 // cache the computed escape state |
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239 assert(es > orig_es, "should have computed an escape state"); |
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240 set_escape_state(idx, es); |
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241 } // orig_es could be PointsToNode::UnknownEscape |
| 0 | 242 return es; |
| 243 } | |
| 244 | |
| 2249 | 245 VectorSet* ConnectionGraph::PointsTo(Node * n) { |
| 246 pt_ptset.Reset(); | |
| 247 pt_visited.Reset(); | |
| 248 pt_worklist.clear(); | |
| 0 | 249 |
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250 #ifdef ASSERT |
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251 Node *orig_n = n; |
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252 #endif |
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253 |
| 65 | 254 n = n->uncast(); |
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255 PointsToNode* npt = ptnode_adr(n->_idx); |
| 0 | 256 |
| 257 // If we have a JavaObject, return just that object | |
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258 if (npt->node_type() == PointsToNode::JavaObject) { |
| 2249 | 259 pt_ptset.set(n->_idx); |
| 260 return &pt_ptset; | |
| 0 | 261 } |
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262 #ifdef ASSERT |
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263 if (npt->_node == NULL) { |
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264 if (orig_n != n) |
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265 orig_n->dump(); |
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266 n->dump(); |
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267 assert(npt->_node != NULL, "unregistered node"); |
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268 } |
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269 #endif |
| 2249 | 270 pt_worklist.push(n->_idx); |
| 271 while(pt_worklist.length() > 0) { | |
| 272 int ni = pt_worklist.pop(); | |
| 273 if (pt_visited.test_set(ni)) | |
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274 continue; |
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275 |
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276 PointsToNode* pn = ptnode_adr(ni); |
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277 // ensure that all inputs of a Phi have been processed |
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278 assert(!_collecting || !pn->_node->is_Phi() || _processed.test(ni),""); |
| 0 | 279 |
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280 int edges_processed = 0; |
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281 uint e_cnt = pn->edge_count(); |
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282 for (uint e = 0; e < e_cnt; e++) { |
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283 uint etgt = pn->edge_target(e); |
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284 PointsToNode::EdgeType et = pn->edge_type(e); |
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285 if (et == PointsToNode::PointsToEdge) { |
| 2249 | 286 pt_ptset.set(etgt); |
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287 edges_processed++; |
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288 } else if (et == PointsToNode::DeferredEdge) { |
| 2249 | 289 pt_worklist.push(etgt); |
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290 edges_processed++; |
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291 } else { |
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292 assert(false,"neither PointsToEdge or DeferredEdge"); |
| 0 | 293 } |
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294 } |
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295 if (edges_processed == 0) { |
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296 // no deferred or pointsto edges found. Assume the value was set |
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297 // outside this method. Add the phantom object to the pointsto set. |
| 2249 | 298 pt_ptset.set(_phantom_object); |
| 0 | 299 } |
| 300 } | |
| 2249 | 301 return &pt_ptset; |
| 0 | 302 } |
| 303 | |
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304 void ConnectionGraph::remove_deferred(uint ni, GrowableArray<uint>* deferred_edges, VectorSet* visited) { |
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305 // This method is most expensive during ConnectionGraph construction. |
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306 // Reuse vectorSet and an additional growable array for deferred edges. |
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307 deferred_edges->clear(); |
| 2249 | 308 visited->Reset(); |
| 0 | 309 |
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310 visited->set(ni); |
| 0 | 311 PointsToNode *ptn = ptnode_adr(ni); |
| 312 | |
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313 // Mark current edges as visited and move deferred edges to separate array. |
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314 for (uint i = 0; i < ptn->edge_count(); ) { |
| 65 | 315 uint t = ptn->edge_target(i); |
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316 #ifdef ASSERT |
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317 assert(!visited->test_set(t), "expecting no duplications"); |
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318 #else |
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319 visited->set(t); |
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320 #endif |
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321 if (ptn->edge_type(i) == PointsToNode::DeferredEdge) { |
| 0 | 322 ptn->remove_edge(t, PointsToNode::DeferredEdge); |
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323 deferred_edges->append(t); |
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324 } else { |
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325 i++; |
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326 } |
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327 } |
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328 for (int next = 0; next < deferred_edges->length(); ++next) { |
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329 uint t = deferred_edges->at(next); |
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330 PointsToNode *ptt = ptnode_adr(t); |
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331 uint e_cnt = ptt->edge_count(); |
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332 for (uint e = 0; e < e_cnt; e++) { |
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333 uint etgt = ptt->edge_target(e); |
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334 if (visited->test_set(etgt)) |
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335 continue; |
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336 |
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337 PointsToNode::EdgeType et = ptt->edge_type(e); |
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338 if (et == PointsToNode::PointsToEdge) { |
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339 add_pointsto_edge(ni, etgt); |
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340 if(etgt == _phantom_object) { |
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341 // Special case - field set outside (globally escaping). |
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342 set_escape_state(ni, PointsToNode::GlobalEscape); |
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343 } |
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344 } else if (et == PointsToNode::DeferredEdge) { |
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345 deferred_edges->append(etgt); |
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346 } else { |
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347 assert(false,"invalid connection graph"); |
| 0 | 348 } |
| 349 } | |
| 350 } | |
| 351 } | |
| 352 | |
| 353 | |
| 354 // Add an edge to node given by "to_i" from any field of adr_i whose offset | |
| 355 // matches "offset" A deferred edge is added if to_i is a LocalVar, and | |
| 356 // a pointsto edge is added if it is a JavaObject | |
| 357 | |
| 358 void ConnectionGraph::add_edge_from_fields(uint adr_i, uint to_i, int offs) { | |
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359 PointsToNode* an = ptnode_adr(adr_i); |
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360 PointsToNode* to = ptnode_adr(to_i); |
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361 bool deferred = (to->node_type() == PointsToNode::LocalVar); |
| 0 | 362 |
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363 for (uint fe = 0; fe < an->edge_count(); fe++) { |
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364 assert(an->edge_type(fe) == PointsToNode::FieldEdge, "expecting a field edge"); |
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365 int fi = an->edge_target(fe); |
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366 PointsToNode* pf = ptnode_adr(fi); |
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367 int po = pf->offset(); |
| 0 | 368 if (po == offs || po == Type::OffsetBot || offs == Type::OffsetBot) { |
| 369 if (deferred) | |
| 370 add_deferred_edge(fi, to_i); | |
| 371 else | |
| 372 add_pointsto_edge(fi, to_i); | |
| 373 } | |
| 374 } | |
| 375 } | |
| 376 | |
| 65 | 377 // Add a deferred edge from node given by "from_i" to any field of adr_i |
| 378 // whose offset matches "offset". | |
| 0 | 379 void ConnectionGraph::add_deferred_edge_to_fields(uint from_i, uint adr_i, int offs) { |
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380 PointsToNode* an = ptnode_adr(adr_i); |
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381 bool is_alloc = an->_node->is_Allocate(); |
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382 for (uint fe = 0; fe < an->edge_count(); fe++) { |
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383 assert(an->edge_type(fe) == PointsToNode::FieldEdge, "expecting a field edge"); |
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384 int fi = an->edge_target(fe); |
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385 PointsToNode* pf = ptnode_adr(fi); |
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386 int offset = pf->offset(); |
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387 if (!is_alloc) { |
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388 // Assume the field was set outside this method if it is not Allocation |
| 0 | 389 add_pointsto_edge(fi, _phantom_object); |
| 390 } | |
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391 if (offset == offs || offset == Type::OffsetBot || offs == Type::OffsetBot) { |
| 0 | 392 add_deferred_edge(from_i, fi); |
| 393 } | |
| 394 } | |
| 395 } | |
| 396 | |
| 65 | 397 // Helper functions |
| 398 | |
| 399 static Node* get_addp_base(Node *addp) { | |
| 400 assert(addp->is_AddP(), "must be AddP"); | |
| 401 // | |
| 402 // AddP cases for Base and Address inputs: | |
| 403 // case #1. Direct object's field reference: | |
| 404 // Allocate | |
| 405 // | | |
| 406 // Proj #5 ( oop result ) | |
| 407 // | | |
| 408 // CheckCastPP (cast to instance type) | |
| 409 // | | | |
| 410 // AddP ( base == address ) | |
| 411 // | |
| 412 // case #2. Indirect object's field reference: | |
| 413 // Phi | |
| 414 // | | |
| 415 // CastPP (cast to instance type) | |
| 416 // | | | |
| 417 // AddP ( base == address ) | |
| 418 // | |
| 419 // case #3. Raw object's field reference for Initialize node: | |
| 420 // Allocate | |
| 421 // | | |
| 422 // Proj #5 ( oop result ) | |
| 423 // top | | |
| 424 // \ | | |
| 425 // AddP ( base == top ) | |
| 426 // | |
| 427 // case #4. Array's element reference: | |
| 428 // {CheckCastPP | CastPP} | |
| 429 // | | | | |
| 430 // | AddP ( array's element offset ) | |
| 431 // | | | |
| 432 // AddP ( array's offset ) | |
| 433 // | |
| 434 // case #5. Raw object's field reference for arraycopy stub call: | |
| 435 // The inline_native_clone() case when the arraycopy stub is called | |
| 436 // after the allocation before Initialize and CheckCastPP nodes. | |
| 437 // Allocate | |
| 438 // | | |
| 439 // Proj #5 ( oop result ) | |
| 440 // | | | |
| 441 // AddP ( base == address ) | |
| 442 // | |
| 77 | 443 // case #6. Constant Pool, ThreadLocal, CastX2P or |
| 444 // Raw object's field reference: | |
| 445 // {ConP, ThreadLocal, CastX2P, raw Load} | |
| 65 | 446 // top | |
| 447 // \ | | |
| 448 // AddP ( base == top ) | |
| 449 // | |
| 77 | 450 // case #7. Klass's field reference. |
| 451 // LoadKlass | |
| 452 // | | | |
| 453 // AddP ( base == address ) | |
| 454 // | |
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455 // case #8. narrow Klass's field reference. |
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456 // LoadNKlass |
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457 // | |
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458 // DecodeN |
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459 // | | |
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460 // AddP ( base == address ) |
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461 // |
| 65 | 462 Node *base = addp->in(AddPNode::Base)->uncast(); |
| 463 if (base->is_top()) { // The AddP case #3 and #6. | |
| 464 base = addp->in(AddPNode::Address)->uncast(); | |
| 957 | 465 while (base->is_AddP()) { |
| 466 // Case #6 (unsafe access) may have several chained AddP nodes. | |
| 467 assert(base->in(AddPNode::Base)->is_top(), "expected unsafe access address only"); | |
| 468 base = base->in(AddPNode::Address)->uncast(); | |
| 469 } | |
| 65 | 470 assert(base->Opcode() == Op_ConP || base->Opcode() == Op_ThreadLocal || |
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471 base->Opcode() == Op_CastX2P || base->is_DecodeN() || |
| 77 | 472 (base->is_Mem() && base->bottom_type() == TypeRawPtr::NOTNULL) || |
| 473 (base->is_Proj() && base->in(0)->is_Allocate()), "sanity"); | |
| 0 | 474 } |
| 65 | 475 return base; |
| 476 } | |
| 477 | |
| 478 static Node* find_second_addp(Node* addp, Node* n) { | |
| 479 assert(addp->is_AddP() && addp->outcnt() > 0, "Don't process dead nodes"); | |
| 480 | |
| 481 Node* addp2 = addp->raw_out(0); | |
| 482 if (addp->outcnt() == 1 && addp2->is_AddP() && | |
| 483 addp2->in(AddPNode::Base) == n && | |
| 484 addp2->in(AddPNode::Address) == addp) { | |
| 485 | |
| 486 assert(addp->in(AddPNode::Base) == n, "expecting the same base"); | |
| 487 // | |
| 488 // Find array's offset to push it on worklist first and | |
| 489 // as result process an array's element offset first (pushed second) | |
| 490 // to avoid CastPP for the array's offset. | |
| 491 // Otherwise the inserted CastPP (LocalVar) will point to what | |
| 492 // the AddP (Field) points to. Which would be wrong since | |
| 493 // the algorithm expects the CastPP has the same point as | |
| 494 // as AddP's base CheckCastPP (LocalVar). | |
| 495 // | |
| 496 // ArrayAllocation | |
| 497 // | | |
| 498 // CheckCastPP | |
| 499 // | | |
| 500 // memProj (from ArrayAllocation CheckCastPP) | |
| 501 // | || | |
| 502 // | || Int (element index) | |
| 503 // | || | ConI (log(element size)) | |
| 504 // | || | / | |
| 505 // | || LShift | |
| 506 // | || / | |
| 507 // | AddP (array's element offset) | |
| 508 // | | | |
| 509 // | | ConI (array's offset: #12(32-bits) or #24(64-bits)) | |
| 510 // | / / | |
| 511 // AddP (array's offset) | |
| 512 // | | |
| 513 // Load/Store (memory operation on array's element) | |
| 514 // | |
| 515 return addp2; | |
| 516 } | |
| 517 return NULL; | |
| 0 | 518 } |
| 519 | |
| 520 // | |
| 521 // Adjust the type and inputs of an AddP which computes the | |
| 522 // address of a field of an instance | |
| 523 // | |
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524 bool ConnectionGraph::split_AddP(Node *addp, Node *base, PhaseGVN *igvn) { |
| 65 | 525 const TypeOopPtr *base_t = igvn->type(base)->isa_oopptr(); |
| 223 | 526 assert(base_t != NULL && base_t->is_known_instance(), "expecting instance oopptr"); |
| 0 | 527 const TypeOopPtr *t = igvn->type(addp)->isa_oopptr(); |
| 65 | 528 if (t == NULL) { |
| 529 // We are computing a raw address for a store captured by an Initialize | |
|
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530 // compute an appropriate address type (cases #3 and #5). |
| 65 | 531 assert(igvn->type(addp) == TypeRawPtr::NOTNULL, "must be raw pointer"); |
| 532 assert(addp->in(AddPNode::Address)->is_Proj(), "base of raw address must be result projection from allocation"); | |
|
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533 intptr_t offs = (int)igvn->find_intptr_t_con(addp->in(AddPNode::Offset), Type::OffsetBot); |
| 65 | 534 assert(offs != Type::OffsetBot, "offset must be a constant"); |
| 535 t = base_t->add_offset(offs)->is_oopptr(); | |
| 536 } | |
| 223 | 537 int inst_id = base_t->instance_id(); |
| 538 assert(!t->is_known_instance() || t->instance_id() == inst_id, | |
| 0 | 539 "old type must be non-instance or match new type"); |
|
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540 |
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541 // The type 't' could be subclass of 'base_t'. |
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542 // As result t->offset() could be large then base_t's size and it will |
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543 // cause the failure in add_offset() with narrow oops since TypeOopPtr() |
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544 // constructor verifies correctness of the offset. |
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545 // |
| 605 | 546 // It could happened on subclass's branch (from the type profiling |
|
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547 // inlining) which was not eliminated during parsing since the exactness |
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548 // of the allocation type was not propagated to the subclass type check. |
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549 // |
|
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550 // Or the type 't' could be not related to 'base_t' at all. |
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551 // It could happened when CHA type is different from MDO type on a dead path |
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552 // (for example, from instanceof check) which is not collapsed during parsing. |
|
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553 // |
|
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554 // Do nothing for such AddP node and don't process its users since |
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555 // this code branch will go away. |
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556 // |
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557 if (!t->is_known_instance() && |
|
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558 !base_t->klass()->is_subtype_of(t->klass())) { |
|
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559 return false; // bail out |
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560 } |
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561 |
| 0 | 562 const TypeOopPtr *tinst = base_t->add_offset(t->offset())->is_oopptr(); |
|
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563 // Do NOT remove the next line: ensure a new alias index is allocated |
|
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564 // for the instance type. Note: C++ will not remove it since the call |
|
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565 // has side effect. |
| 0 | 566 int alias_idx = _compile->get_alias_index(tinst); |
| 567 igvn->set_type(addp, tinst); | |
| 568 // record the allocation in the node map | |
|
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569 assert(ptnode_adr(addp->_idx)->_node != NULL, "should be registered"); |
| 0 | 570 set_map(addp->_idx, get_map(base->_idx)); |
|
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571 |
|
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572 // Set addp's Base and Address to 'base'. |
|
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573 Node *abase = addp->in(AddPNode::Base); |
|
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574 Node *adr = addp->in(AddPNode::Address); |
|
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575 if (adr->is_Proj() && adr->in(0)->is_Allocate() && |
|
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576 adr->in(0)->_idx == (uint)inst_id) { |
|
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577 // Skip AddP cases #3 and #5. |
|
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578 } else { |
|
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579 assert(!abase->is_top(), "sanity"); // AddP case #3 |
|
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580 if (abase != base) { |
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581 igvn->hash_delete(addp); |
|
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582 addp->set_req(AddPNode::Base, base); |
|
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583 if (abase == adr) { |
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584 addp->set_req(AddPNode::Address, base); |
|
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585 } else { |
|
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586 // AddP case #4 (adr is array's element offset AddP node) |
|
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587 #ifdef ASSERT |
|
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588 const TypeOopPtr *atype = igvn->type(adr)->isa_oopptr(); |
|
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589 assert(adr->is_AddP() && atype != NULL && |
|
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590 atype->instance_id() == inst_id, "array's element offset should be processed first"); |
|
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591 #endif |
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592 } |
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593 igvn->hash_insert(addp); |
| 0 | 594 } |
| 595 } | |
| 65 | 596 // Put on IGVN worklist since at least addp's type was changed above. |
| 597 record_for_optimizer(addp); | |
|
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598 return true; |
| 0 | 599 } |
| 600 | |
| 601 // | |
| 602 // Create a new version of orig_phi if necessary. Returns either the newly | |
|
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603 // created phi or an existing phi. Sets create_new to indicate whether a new |
| 0 | 604 // phi was created. Cache the last newly created phi in the node map. |
| 605 // | |
| 606 PhiNode *ConnectionGraph::create_split_phi(PhiNode *orig_phi, int alias_idx, GrowableArray<PhiNode *> &orig_phi_worklist, PhaseGVN *igvn, bool &new_created) { | |
| 607 Compile *C = _compile; | |
| 608 new_created = false; | |
| 609 int phi_alias_idx = C->get_alias_index(orig_phi->adr_type()); | |
| 610 // nothing to do if orig_phi is bottom memory or matches alias_idx | |
| 65 | 611 if (phi_alias_idx == alias_idx) { |
| 0 | 612 return orig_phi; |
| 613 } | |
|
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614 // Have we recently created a Phi for this alias index? |
| 0 | 615 PhiNode *result = get_map_phi(orig_phi->_idx); |
| 616 if (result != NULL && C->get_alias_index(result->adr_type()) == alias_idx) { | |
| 617 return result; | |
| 618 } | |
|
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619 // Previous check may fail when the same wide memory Phi was split into Phis |
|
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620 // for different memory slices. Search all Phis for this region. |
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621 if (result != NULL) { |
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622 Node* region = orig_phi->in(0); |
|
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623 for (DUIterator_Fast imax, i = region->fast_outs(imax); i < imax; i++) { |
|
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624 Node* phi = region->fast_out(i); |
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625 if (phi->is_Phi() && |
|
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626 C->get_alias_index(phi->as_Phi()->adr_type()) == alias_idx) { |
|
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627 assert(phi->_idx >= nodes_size(), "only new Phi per instance memory slice"); |
|
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628 return phi->as_Phi(); |
|
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629 } |
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630 } |
|
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631 } |
|
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632 if ((int)C->unique() + 2*NodeLimitFudgeFactor > MaxNodeLimit) { |
|
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633 if (C->do_escape_analysis() == true && !C->failing()) { |
|
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634 // Retry compilation without escape analysis. |
|
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635 // If this is the first failure, the sentinel string will "stick" |
|
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636 // to the Compile object, and the C2Compiler will see it and retry. |
|
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637 C->record_failure(C2Compiler::retry_no_escape_analysis()); |
|
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638 } |
|
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639 return NULL; |
|
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640 } |
| 0 | 641 orig_phi_worklist.append_if_missing(orig_phi); |
| 65 | 642 const TypePtr *atype = C->get_adr_type(alias_idx); |
| 0 | 643 result = PhiNode::make(orig_phi->in(0), NULL, Type::MEMORY, atype); |
|
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644 C->copy_node_notes_to(result, orig_phi); |
| 0 | 645 igvn->set_type(result, result->bottom_type()); |
| 646 record_for_optimizer(result); | |
|
1101
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647 |
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648 debug_only(Node* pn = ptnode_adr(orig_phi->_idx)->_node;) |
|
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649 assert(pn == NULL || pn == orig_phi, "wrong node"); |
|
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650 set_map(orig_phi->_idx, result); |
|
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651 ptnode_adr(orig_phi->_idx)->_node = orig_phi; |
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652 |
| 0 | 653 new_created = true; |
| 654 return result; | |
| 655 } | |
| 656 | |
| 657 // | |
|
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658 // Return a new version of Memory Phi "orig_phi" with the inputs having the |
| 0 | 659 // specified alias index. |
| 660 // | |
| 661 PhiNode *ConnectionGraph::split_memory_phi(PhiNode *orig_phi, int alias_idx, GrowableArray<PhiNode *> &orig_phi_worklist, PhaseGVN *igvn) { | |
| 662 | |
| 663 assert(alias_idx != Compile::AliasIdxBot, "can't split out bottom memory"); | |
| 664 Compile *C = _compile; | |
| 665 bool new_phi_created; | |
| 65 | 666 PhiNode *result = create_split_phi(orig_phi, alias_idx, orig_phi_worklist, igvn, new_phi_created); |
| 0 | 667 if (!new_phi_created) { |
| 668 return result; | |
| 669 } | |
| 670 | |
| 671 GrowableArray<PhiNode *> phi_list; | |
| 672 GrowableArray<uint> cur_input; | |
| 673 | |
| 674 PhiNode *phi = orig_phi; | |
| 675 uint idx = 1; | |
| 676 bool finished = false; | |
| 677 while(!finished) { | |
| 678 while (idx < phi->req()) { | |
| 65 | 679 Node *mem = find_inst_mem(phi->in(idx), alias_idx, orig_phi_worklist, igvn); |
| 0 | 680 if (mem != NULL && mem->is_Phi()) { |
| 65 | 681 PhiNode *newphi = create_split_phi(mem->as_Phi(), alias_idx, orig_phi_worklist, igvn, new_phi_created); |
| 0 | 682 if (new_phi_created) { |
| 683 // found an phi for which we created a new split, push current one on worklist and begin | |
| 684 // processing new one | |
| 685 phi_list.push(phi); | |
| 686 cur_input.push(idx); | |
| 687 phi = mem->as_Phi(); | |
| 65 | 688 result = newphi; |
| 0 | 689 idx = 1; |
| 690 continue; | |
| 691 } else { | |
| 65 | 692 mem = newphi; |
| 0 | 693 } |
| 694 } | |
|
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695 if (C->failing()) { |
|
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696 return NULL; |
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697 } |
| 0 | 698 result->set_req(idx++, mem); |
| 699 } | |
| 700 #ifdef ASSERT | |
| 701 // verify that the new Phi has an input for each input of the original | |
| 702 assert( phi->req() == result->req(), "must have same number of inputs."); | |
| 703 assert( result->in(0) != NULL && result->in(0) == phi->in(0), "regions must match"); | |
| 65 | 704 #endif |
| 705 // Check if all new phi's inputs have specified alias index. | |
| 706 // Otherwise use old phi. | |
| 0 | 707 for (uint i = 1; i < phi->req(); i++) { |
| 65 | 708 Node* in = result->in(i); |
| 709 assert((phi->in(i) == NULL) == (in == NULL), "inputs must correspond."); | |
| 0 | 710 } |
| 711 // we have finished processing a Phi, see if there are any more to do | |
| 712 finished = (phi_list.length() == 0 ); | |
| 713 if (!finished) { | |
| 714 phi = phi_list.pop(); | |
| 715 idx = cur_input.pop(); | |
| 65 | 716 PhiNode *prev_result = get_map_phi(phi->_idx); |
| 717 prev_result->set_req(idx++, result); | |
| 718 result = prev_result; | |
| 0 | 719 } |
| 720 } | |
| 721 return result; | |
| 722 } | |
| 723 | |
| 65 | 724 |
| 725 // | |
| 726 // The next methods are derived from methods in MemNode. | |
| 727 // | |
| 1815 | 728 static Node *step_through_mergemem(MergeMemNode *mmem, int alias_idx, const TypeOopPtr *toop) { |
| 65 | 729 Node *mem = mmem; |
| 1815 | 730 // TypeOopPtr::NOTNULL+any is an OOP with unknown offset - generally |
| 65 | 731 // means an array I have not precisely typed yet. Do not do any |
| 732 // alias stuff with it any time soon. | |
| 1815 | 733 if( toop->base() != Type::AnyPtr && |
| 734 !(toop->klass() != NULL && | |
| 735 toop->klass()->is_java_lang_Object() && | |
| 736 toop->offset() == Type::OffsetBot) ) { | |
| 65 | 737 mem = mmem->memory_at(alias_idx); |
| 738 // Update input if it is progress over what we have now | |
| 739 } | |
| 740 return mem; | |
| 741 } | |
| 742 | |
| 743 // | |
|
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744 // Move memory users to their memory slices. |
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745 // |
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746 void ConnectionGraph::move_inst_mem(Node* n, GrowableArray<PhiNode *> &orig_phis, PhaseGVN *igvn) { |
|
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747 Compile* C = _compile; |
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748 |
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749 const TypePtr* tp = igvn->type(n->in(MemNode::Address))->isa_ptr(); |
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750 assert(tp != NULL, "ptr type"); |
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751 int alias_idx = C->get_alias_index(tp); |
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752 int general_idx = C->get_general_index(alias_idx); |
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753 |
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754 // Move users first |
|
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755 for (DUIterator_Fast imax, i = n->fast_outs(imax); i < imax; i++) { |
|
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756 Node* use = n->fast_out(i); |
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757 if (use->is_MergeMem()) { |
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758 MergeMemNode* mmem = use->as_MergeMem(); |
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759 assert(n == mmem->memory_at(alias_idx), "should be on instance memory slice"); |
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760 if (n != mmem->memory_at(general_idx) || alias_idx == general_idx) { |
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761 continue; // Nothing to do |
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762 } |
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763 // Replace previous general reference to mem node. |
|
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764 uint orig_uniq = C->unique(); |
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765 Node* m = find_inst_mem(n, general_idx, orig_phis, igvn); |
|
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766 assert(orig_uniq == C->unique(), "no new nodes"); |
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767 mmem->set_memory_at(general_idx, m); |
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768 --imax; |
|
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769 --i; |
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770 } else if (use->is_MemBar()) { |
|
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771 assert(!use->is_Initialize(), "initializing stores should not be moved"); |
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772 if (use->req() > MemBarNode::Precedent && |
|
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773 use->in(MemBarNode::Precedent) == n) { |
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774 // Don't move related membars. |
|
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775 record_for_optimizer(use); |
|
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776 continue; |
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777 } |
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778 tp = use->as_MemBar()->adr_type()->isa_ptr(); |
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779 if (tp != NULL && C->get_alias_index(tp) == alias_idx || |
|
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780 alias_idx == general_idx) { |
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781 continue; // Nothing to do |
|
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782 } |
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783 // Move to general memory slice. |
|
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784 uint orig_uniq = C->unique(); |
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|
785 Node* m = find_inst_mem(n, general_idx, orig_phis, igvn); |
|
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786 assert(orig_uniq == C->unique(), "no new nodes"); |
|
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|
787 igvn->hash_delete(use); |
|
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788 imax -= use->replace_edge(n, m); |
|
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|
789 igvn->hash_insert(use); |
|
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|
790 record_for_optimizer(use); |
|
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|
791 --i; |
|
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|
792 #ifdef ASSERT |
|
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793 } else if (use->is_Mem()) { |
|
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794 if (use->Opcode() == Op_StoreCM && use->in(MemNode::OopStore) == n) { |
|
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|
795 // Don't move related cardmark. |
|
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|
796 continue; |
|
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797 } |
|
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|
798 // Memory nodes should have new memory input. |
|
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799 tp = igvn->type(use->in(MemNode::Address))->isa_ptr(); |
|
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800 assert(tp != NULL, "ptr type"); |
|
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|
801 int idx = C->get_alias_index(tp); |
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802 assert(get_map(use->_idx) != NULL || idx == alias_idx, |
|
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803 "Following memory nodes should have new memory input or be on the same memory slice"); |
|
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804 } else if (use->is_Phi()) { |
|
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|
805 // Phi nodes should be split and moved already. |
|
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806 tp = use->as_Phi()->adr_type()->isa_ptr(); |
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|
807 assert(tp != NULL, "ptr type"); |
|
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808 int idx = C->get_alias_index(tp); |
|
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809 assert(idx == alias_idx, "Following Phi nodes should be on the same memory slice"); |
|
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810 } else { |
|
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811 use->dump(); |
|
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|
812 assert(false, "should not be here"); |
|
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|
813 #endif |
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814 } |
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815 } |
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816 } |
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|
817 |
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818 // |
| 65 | 819 // Search memory chain of "mem" to find a MemNode whose address |
| 820 // is the specified alias index. | |
| 821 // | |
| 822 Node* ConnectionGraph::find_inst_mem(Node *orig_mem, int alias_idx, GrowableArray<PhiNode *> &orig_phis, PhaseGVN *phase) { | |
| 823 if (orig_mem == NULL) | |
| 824 return orig_mem; | |
| 825 Compile* C = phase->C; | |
| 1815 | 826 const TypeOopPtr *toop = C->get_adr_type(alias_idx)->isa_oopptr(); |
| 827 bool is_instance = (toop != NULL) && toop->is_known_instance(); | |
|
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828 Node *start_mem = C->start()->proj_out(TypeFunc::Memory); |
| 65 | 829 Node *prev = NULL; |
| 830 Node *result = orig_mem; | |
| 831 while (prev != result) { | |
| 832 prev = result; | |
|
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833 if (result == start_mem) |
| 605 | 834 break; // hit one of our sentinels |
| 65 | 835 if (result->is_Mem()) { |
|
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836 const Type *at = phase->type(result->in(MemNode::Address)); |
|
2459
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837 if (at == Type::TOP) |
|
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|
838 break; // Dead |
|
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|
839 assert (at->isa_ptr() != NULL, "pointer type required."); |
|
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840 int idx = C->get_alias_index(at->is_ptr()); |
|
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|
841 if (idx == alias_idx) |
|
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|
842 break; // Found |
|
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843 if (!is_instance && (at->isa_oopptr() == NULL || |
|
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844 !at->is_oopptr()->is_known_instance())) { |
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845 break; // Do not skip store to general memory slice. |
| 65 | 846 } |
|
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847 result = result->in(MemNode::Memory); |
| 65 | 848 } |
| 849 if (!is_instance) | |
| 850 continue; // don't search further for non-instance types | |
| 851 // skip over a call which does not affect this memory slice | |
| 852 if (result->is_Proj() && result->as_Proj()->_con == TypeFunc::Memory) { | |
| 853 Node *proj_in = result->in(0); | |
| 1815 | 854 if (proj_in->is_Allocate() && proj_in->_idx == (uint)toop->instance_id()) { |
| 605 | 855 break; // hit one of our sentinels |
|
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856 } else if (proj_in->is_Call()) { |
| 65 | 857 CallNode *call = proj_in->as_Call(); |
| 1815 | 858 if (!call->may_modify(toop, phase)) { |
| 65 | 859 result = call->in(TypeFunc::Memory); |
| 860 } | |
| 861 } else if (proj_in->is_Initialize()) { | |
| 862 AllocateNode* alloc = proj_in->as_Initialize()->allocation(); | |
| 863 // Stop if this is the initialization for the object instance which | |
| 864 // which contains this memory slice, otherwise skip over it. | |
| 1815 | 865 if (alloc == NULL || alloc->_idx != (uint)toop->instance_id()) { |
| 65 | 866 result = proj_in->in(TypeFunc::Memory); |
| 867 } | |
| 868 } else if (proj_in->is_MemBar()) { | |
| 869 result = proj_in->in(TypeFunc::Memory); | |
| 870 } | |
| 871 } else if (result->is_MergeMem()) { | |
| 872 MergeMemNode *mmem = result->as_MergeMem(); | |
| 1815 | 873 result = step_through_mergemem(mmem, alias_idx, toop); |
| 65 | 874 if (result == mmem->base_memory()) { |
| 875 // Didn't find instance memory, search through general slice recursively. | |
| 876 result = mmem->memory_at(C->get_general_index(alias_idx)); | |
| 877 result = find_inst_mem(result, alias_idx, orig_phis, phase); | |
| 878 if (C->failing()) { | |
| 879 return NULL; | |
| 880 } | |
| 881 mmem->set_memory_at(alias_idx, result); | |
| 882 } | |
| 883 } else if (result->is_Phi() && | |
| 884 C->get_alias_index(result->as_Phi()->adr_type()) != alias_idx) { | |
| 885 Node *un = result->as_Phi()->unique_input(phase); | |
| 886 if (un != NULL) { | |
|
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887 orig_phis.append_if_missing(result->as_Phi()); |
| 65 | 888 result = un; |
| 889 } else { | |
| 890 break; | |
| 891 } | |
|
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892 } else if (result->is_ClearArray()) { |
| 1815 | 893 if (!ClearArrayNode::step_through(&result, (uint)toop->instance_id(), phase)) { |
|
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894 // Can not bypass initialization of the instance |
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895 // we are looking for. |
|
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896 break; |
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897 } |
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898 // Otherwise skip it (the call updated 'result' value). |
| 584 | 899 } else if (result->Opcode() == Op_SCMemProj) { |
| 900 assert(result->in(0)->is_LoadStore(), "sanity"); | |
| 901 const Type *at = phase->type(result->in(0)->in(MemNode::Address)); | |
| 902 if (at != Type::TOP) { | |
| 903 assert (at->isa_ptr() != NULL, "pointer type required."); | |
| 904 int idx = C->get_alias_index(at->is_ptr()); | |
| 905 assert(idx != alias_idx, "Object is not scalar replaceable if a LoadStore node access its field"); | |
| 906 break; | |
| 907 } | |
| 908 result = result->in(0)->in(MemNode::Memory); | |
| 65 | 909 } |
| 910 } | |
| 247 | 911 if (result->is_Phi()) { |
| 65 | 912 PhiNode *mphi = result->as_Phi(); |
| 913 assert(mphi->bottom_type() == Type::MEMORY, "memory phi required"); | |
| 914 const TypePtr *t = mphi->adr_type(); | |
|
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915 if (!is_instance) { |
| 247 | 916 // Push all non-instance Phis on the orig_phis worklist to update inputs |
| 917 // during Phase 4 if needed. | |
| 918 orig_phis.append_if_missing(mphi); | |
|
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919 } else if (C->get_alias_index(t) != alias_idx) { |
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920 // Create a new Phi with the specified alias index type. |
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921 result = split_memory_phi(mphi, alias_idx, orig_phis, phase); |
| 65 | 922 } |
| 923 } | |
| 924 // the result is either MemNode, PhiNode, InitializeNode. | |
| 925 return result; | |
| 926 } | |
| 927 | |
| 0 | 928 // |
| 929 // Convert the types of unescaped object to instance types where possible, | |
| 930 // propagate the new type information through the graph, and update memory | |
| 931 // edges and MergeMem inputs to reflect the new type. | |
| 932 // | |
| 933 // We start with allocations (and calls which may be allocations) on alloc_worklist. | |
| 934 // The processing is done in 4 phases: | |
| 935 // | |
| 936 // Phase 1: Process possible allocations from alloc_worklist. Create instance | |
| 937 // types for the CheckCastPP for allocations where possible. | |
| 938 // Propagate the the new types through users as follows: | |
| 939 // casts and Phi: push users on alloc_worklist | |
| 940 // AddP: cast Base and Address inputs to the instance type | |
| 941 // push any AddP users on alloc_worklist and push any memnode | |
| 942 // users onto memnode_worklist. | |
| 943 // Phase 2: Process MemNode's from memnode_worklist. compute new address type and | |
| 944 // search the Memory chain for a store with the appropriate type | |
| 945 // address type. If a Phi is found, create a new version with | |
| 605 | 946 // the appropriate memory slices from each of the Phi inputs. |
| 0 | 947 // For stores, process the users as follows: |
| 948 // MemNode: push on memnode_worklist | |
| 949 // MergeMem: push on mergemem_worklist | |
| 950 // Phase 3: Process MergeMem nodes from mergemem_worklist. Walk each memory slice | |
| 951 // moving the first node encountered of each instance type to the | |
| 952 // the input corresponding to its alias index. | |
| 953 // appropriate memory slice. | |
| 954 // Phase 4: Update the inputs of non-instance memory Phis and the Memory input of memnodes. | |
| 955 // | |
| 956 // In the following example, the CheckCastPP nodes are the cast of allocation | |
| 957 // results and the allocation of node 29 is unescaped and eligible to be an | |
| 958 // instance type. | |
| 959 // | |
| 960 // We start with: | |
| 961 // | |
| 962 // 7 Parm #memory | |
| 963 // 10 ConI "12" | |
| 964 // 19 CheckCastPP "Foo" | |
| 965 // 20 AddP _ 19 19 10 Foo+12 alias_index=4 | |
| 966 // 29 CheckCastPP "Foo" | |
| 967 // 30 AddP _ 29 29 10 Foo+12 alias_index=4 | |
| 968 // | |
| 969 // 40 StoreP 25 7 20 ... alias_index=4 | |
| 970 // 50 StoreP 35 40 30 ... alias_index=4 | |
| 971 // 60 StoreP 45 50 20 ... alias_index=4 | |
| 972 // 70 LoadP _ 60 30 ... alias_index=4 | |
| 973 // 80 Phi 75 50 60 Memory alias_index=4 | |
| 974 // 90 LoadP _ 80 30 ... alias_index=4 | |
| 975 // 100 LoadP _ 80 20 ... alias_index=4 | |
| 976 // | |
| 977 // | |
| 978 // Phase 1 creates an instance type for node 29 assigning it an instance id of 24 | |
| 979 // and creating a new alias index for node 30. This gives: | |
| 980 // | |
| 981 // 7 Parm #memory | |
| 982 // 10 ConI "12" | |
| 983 // 19 CheckCastPP "Foo" | |
| 984 // 20 AddP _ 19 19 10 Foo+12 alias_index=4 | |
| 985 // 29 CheckCastPP "Foo" iid=24 | |
| 986 // 30 AddP _ 29 29 10 Foo+12 alias_index=6 iid=24 | |
| 987 // | |
| 988 // 40 StoreP 25 7 20 ... alias_index=4 | |
| 989 // 50 StoreP 35 40 30 ... alias_index=6 | |
| 990 // 60 StoreP 45 50 20 ... alias_index=4 | |
| 991 // 70 LoadP _ 60 30 ... alias_index=6 | |
| 992 // 80 Phi 75 50 60 Memory alias_index=4 | |
| 993 // 90 LoadP _ 80 30 ... alias_index=6 | |
| 994 // 100 LoadP _ 80 20 ... alias_index=4 | |
| 995 // | |
| 996 // In phase 2, new memory inputs are computed for the loads and stores, | |
| 997 // And a new version of the phi is created. In phase 4, the inputs to | |
| 998 // node 80 are updated and then the memory nodes are updated with the | |
| 999 // values computed in phase 2. This results in: | |
| 1000 // | |
| 1001 // 7 Parm #memory | |
| 1002 // 10 ConI "12" | |
| 1003 // 19 CheckCastPP "Foo" | |
| 1004 // 20 AddP _ 19 19 10 Foo+12 alias_index=4 | |
| 1005 // 29 CheckCastPP "Foo" iid=24 | |
| 1006 // 30 AddP _ 29 29 10 Foo+12 alias_index=6 iid=24 | |
| 1007 // | |
| 1008 // 40 StoreP 25 7 20 ... alias_index=4 | |
| 1009 // 50 StoreP 35 7 30 ... alias_index=6 | |
| 1010 // 60 StoreP 45 40 20 ... alias_index=4 | |
| 1011 // 70 LoadP _ 50 30 ... alias_index=6 | |
| 1012 // 80 Phi 75 40 60 Memory alias_index=4 | |
| 1013 // 120 Phi 75 50 50 Memory alias_index=6 | |
| 1014 // 90 LoadP _ 120 30 ... alias_index=6 | |
| 1015 // 100 LoadP _ 80 20 ... alias_index=4 | |
| 1016 // | |
| 1017 void ConnectionGraph::split_unique_types(GrowableArray<Node *> &alloc_worklist) { | |
| 1018 GrowableArray<Node *> memnode_worklist; | |
| 1019 GrowableArray<PhiNode *> orig_phis; | |
|
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1020 |
| 1921 | 1021 PhaseIterGVN *igvn = _igvn; |
| 0 | 1022 uint new_index_start = (uint) _compile->num_alias_types(); |
|
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1023 Arena* arena = Thread::current()->resource_area(); |
|
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1024 VectorSet visited(arena); |
| 0 | 1025 |
| 65 | 1026 |
| 1027 // Phase 1: Process possible allocations from alloc_worklist. | |
| 1028 // Create instance types for the CheckCastPP for allocations where possible. | |
|
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1029 // |
|
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1030 // (Note: don't forget to change the order of the second AddP node on |
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1031 // the alloc_worklist if the order of the worklist processing is changed, |
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1032 // see the comment in find_second_addp().) |
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1033 // |
| 0 | 1034 while (alloc_worklist.length() != 0) { |
| 1035 Node *n = alloc_worklist.pop(); | |
| 1036 uint ni = n->_idx; | |
| 65 | 1037 const TypeOopPtr* tinst = NULL; |
| 0 | 1038 if (n->is_Call()) { |
| 1039 CallNode *alloc = n->as_Call(); | |
| 1040 // copy escape information to call node | |
|
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1041 PointsToNode* ptn = ptnode_adr(alloc->_idx); |
|
1634
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1042 PointsToNode::EscapeState es = escape_state(alloc); |
| 65 | 1043 // We have an allocation or call which returns a Java object, |
| 1044 // see if it is unescaped. | |
|
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1045 if (es != PointsToNode::NoEscape || !ptn->scalar_replaceable()) |
| 0 | 1046 continue; |
|
784
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1047 |
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1048 // Find CheckCastPP for the allocate or for the return value of a call |
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1049 n = alloc->result_cast(); |
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1050 if (n == NULL) { // No uses except Initialize node |
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1051 if (alloc->is_Allocate()) { |
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1052 // Set the scalar_replaceable flag for allocation |
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1053 // so it could be eliminated if it has no uses. |
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1054 alloc->as_Allocate()->_is_scalar_replaceable = true; |
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1055 } |
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1056 continue; |
|
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1057 } |
|
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1058 if (!n->is_CheckCastPP()) { // not unique CheckCastPP. |
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1059 assert(!alloc->is_Allocate(), "allocation should have unique type"); |
| 65 | 1060 continue; |
|
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1061 } |
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1062 |
| 65 | 1063 // The inline code for Object.clone() casts the allocation result to |
| 247 | 1064 // java.lang.Object and then to the actual type of the allocated |
| 65 | 1065 // object. Detect this case and use the second cast. |
| 247 | 1066 // Also detect j.l.reflect.Array.newInstance(jobject, jint) case when |
| 1067 // the allocation result is cast to java.lang.Object and then | |
| 1068 // to the actual Array type. | |
| 65 | 1069 if (alloc->is_Allocate() && n->as_Type()->type() == TypeInstPtr::NOTNULL |
| 247 | 1070 && (alloc->is_AllocateArray() || |
| 1071 igvn->type(alloc->in(AllocateNode::KlassNode)) != TypeKlassPtr::OBJECT)) { | |
| 65 | 1072 Node *cast2 = NULL; |
| 1073 for (DUIterator_Fast imax, i = n->fast_outs(imax); i < imax; i++) { | |
| 1074 Node *use = n->fast_out(i); | |
| 1075 if (use->is_CheckCastPP()) { | |
| 1076 cast2 = use; | |
| 1077 break; | |
| 1078 } | |
| 1079 } | |
| 1080 if (cast2 != NULL) { | |
| 1081 n = cast2; | |
| 1082 } else { | |
|
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1083 // Non-scalar replaceable if the allocation type is unknown statically |
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1084 // (reflection allocation), the object can't be restored during |
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1085 // deoptimization without precise type. |
| 65 | 1086 continue; |
| 1087 } | |
| 1088 } | |
|
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1089 if (alloc->is_Allocate()) { |
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1090 // Set the scalar_replaceable flag for allocation |
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1091 // so it could be eliminated. |
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1092 alloc->as_Allocate()->_is_scalar_replaceable = true; |
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1093 } |
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1094 set_escape_state(n->_idx, es); // CheckCastPP escape state |
| 247 | 1095 // in order for an object to be scalar-replaceable, it must be: |
| 65 | 1096 // - a direct allocation (not a call returning an object) |
| 1097 // - non-escaping | |
| 1098 // - eligible to be a unique type | |
| 1099 // - not determined to be ineligible by escape analysis | |
|
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1100 assert(ptnode_adr(alloc->_idx)->_node != NULL && |
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1101 ptnode_adr(n->_idx)->_node != NULL, "should be registered"); |
| 0 | 1102 set_map(alloc->_idx, n); |
| 1103 set_map(n->_idx, alloc); | |
| 65 | 1104 const TypeOopPtr *t = igvn->type(n)->isa_oopptr(); |
| 1105 if (t == NULL) | |
|
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1106 continue; // not a TypeOopPtr |
| 247 | 1107 tinst = t->cast_to_exactness(true)->is_oopptr()->cast_to_instance_id(ni); |
| 0 | 1108 igvn->hash_delete(n); |
| 1109 igvn->set_type(n, tinst); | |
| 1110 n->raise_bottom_type(tinst); | |
| 1111 igvn->hash_insert(n); | |
| 65 | 1112 record_for_optimizer(n); |
|
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1113 if (alloc->is_Allocate() && (t->isa_instptr() || t->isa_aryptr())) { |
| 163 | 1114 |
| 1115 // First, put on the worklist all Field edges from Connection Graph | |
| 1116 // which is more accurate then putting immediate users from Ideal Graph. | |
| 1117 for (uint e = 0; e < ptn->edge_count(); e++) { | |
|
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1118 Node *use = ptnode_adr(ptn->edge_target(e))->_node; |
| 163 | 1119 assert(ptn->edge_type(e) == PointsToNode::FieldEdge && use->is_AddP(), |
| 1120 "only AddP nodes are Field edges in CG"); | |
| 1121 if (use->outcnt() > 0) { // Don't process dead nodes | |
| 1122 Node* addp2 = find_second_addp(use, use->in(AddPNode::Base)); | |
| 1123 if (addp2 != NULL) { | |
| 1124 assert(alloc->is_AllocateArray(),"array allocation was expected"); | |
| 1125 alloc_worklist.append_if_missing(addp2); | |
| 1126 } | |
| 1127 alloc_worklist.append_if_missing(use); | |
| 1128 } | |
| 1129 } | |
| 1130 | |
| 65 | 1131 // An allocation may have an Initialize which has raw stores. Scan |
| 1132 // the users of the raw allocation result and push AddP users | |
| 1133 // on alloc_worklist. | |
| 1134 Node *raw_result = alloc->proj_out(TypeFunc::Parms); | |
| 1135 assert (raw_result != NULL, "must have an allocation result"); | |
| 1136 for (DUIterator_Fast imax, i = raw_result->fast_outs(imax); i < imax; i++) { | |
| 1137 Node *use = raw_result->fast_out(i); | |
| 1138 if (use->is_AddP() && use->outcnt() > 0) { // Don't process dead nodes | |
| 1139 Node* addp2 = find_second_addp(use, raw_result); | |
| 1140 if (addp2 != NULL) { | |
| 1141 assert(alloc->is_AllocateArray(),"array allocation was expected"); | |
| 1142 alloc_worklist.append_if_missing(addp2); | |
| 1143 } | |
| 1144 alloc_worklist.append_if_missing(use); | |
|
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1145 } else if (use->is_MemBar()) { |
| 65 | 1146 memnode_worklist.append_if_missing(use); |
| 1147 } | |
| 1148 } | |
| 1149 } | |
| 0 | 1150 } else if (n->is_AddP()) { |
| 2249 | 1151 VectorSet* ptset = PointsTo(get_addp_base(n)); |
| 1152 assert(ptset->Size() == 1, "AddP address is unique"); | |
| 1153 uint elem = ptset->getelem(); // Allocation node's index | |
|
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1154 if (elem == _phantom_object) { |
|
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1155 assert(false, "escaped allocation"); |
| 65 | 1156 continue; // Assume the value was set outside this method. |
|
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1157 } |
| 65 | 1158 Node *base = get_map(elem); // CheckCastPP node |
|
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1159 if (!split_AddP(n, base, igvn)) continue; // wrong type from dead path |
| 65 | 1160 tinst = igvn->type(base)->isa_oopptr(); |
| 1161 } else if (n->is_Phi() || | |
| 1162 n->is_CheckCastPP() || | |
|
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1163 n->is_EncodeP() || |
|
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1164 n->is_DecodeN() || |
| 65 | 1165 (n->is_ConstraintCast() && n->Opcode() == Op_CastPP)) { |
| 0 | 1166 if (visited.test_set(n->_idx)) { |
| 1167 assert(n->is_Phi(), "loops only through Phi's"); | |
| 1168 continue; // already processed | |
| 1169 } | |
| 2249 | 1170 VectorSet* ptset = PointsTo(n); |
| 1171 if (ptset->Size() == 1) { | |
| 1172 uint elem = ptset->getelem(); // Allocation node's index | |
|
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1173 if (elem == _phantom_object) { |
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1174 assert(false, "escaped allocation"); |
| 65 | 1175 continue; // Assume the value was set outside this method. |
|
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1176 } |
| 65 | 1177 Node *val = get_map(elem); // CheckCastPP node |
| 0 | 1178 TypeNode *tn = n->as_Type(); |
| 65 | 1179 tinst = igvn->type(val)->isa_oopptr(); |
| 223 | 1180 assert(tinst != NULL && tinst->is_known_instance() && |
| 1181 (uint)tinst->instance_id() == elem , "instance type expected."); | |
| 163 | 1182 |
| 1183 const Type *tn_type = igvn->type(tn); | |
| 223 | 1184 const TypeOopPtr *tn_t; |
| 1185 if (tn_type->isa_narrowoop()) { | |
| 1186 tn_t = tn_type->make_ptr()->isa_oopptr(); | |
| 1187 } else { | |
| 1188 tn_t = tn_type->isa_oopptr(); | |
| 1189 } | |
| 0 | 1190 |
|
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1191 if (tn_t != NULL && tinst->klass()->is_subtype_of(tn_t->klass())) { |
| 163 | 1192 if (tn_type->isa_narrowoop()) { |
| 1193 tn_type = tinst->make_narrowoop(); | |
| 1194 } else { | |
| 1195 tn_type = tinst; | |
| 1196 } | |
| 0 | 1197 igvn->hash_delete(tn); |
| 163 | 1198 igvn->set_type(tn, tn_type); |
| 1199 tn->set_type(tn_type); | |
| 0 | 1200 igvn->hash_insert(tn); |
| 65 | 1201 record_for_optimizer(n); |
|
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1202 } else { |
|
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1203 assert(tn_type == TypePtr::NULL_PTR || |
|
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1204 tn_t != NULL && !tinst->klass()->is_subtype_of(tn_t->klass()), |
|
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1205 "unexpected type"); |
|
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1206 continue; // Skip dead path with different type |
| 0 | 1207 } |
| 1208 } | |
| 1209 } else { | |
|
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1210 debug_only(n->dump();) |
|
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1211 assert(false, "EA: unexpected node"); |
| 0 | 1212 continue; |
| 1213 } | |
|
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1214 // push allocation's users on appropriate worklist |
| 0 | 1215 for (DUIterator_Fast imax, i = n->fast_outs(imax); i < imax; i++) { |
| 1216 Node *use = n->fast_out(i); | |
| 1217 if(use->is_Mem() && use->in(MemNode::Address) == n) { | |
|
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1218 // Load/store to instance's field |
| 65 | 1219 memnode_worklist.append_if_missing(use); |
|
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1220 } else if (use->is_MemBar()) { |
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1221 memnode_worklist.append_if_missing(use); |
| 65 | 1222 } else if (use->is_AddP() && use->outcnt() > 0) { // No dead nodes |
| 1223 Node* addp2 = find_second_addp(use, n); | |
| 1224 if (addp2 != NULL) { | |
| 1225 alloc_worklist.append_if_missing(addp2); | |
| 1226 } | |
| 1227 alloc_worklist.append_if_missing(use); | |
| 1228 } else if (use->is_Phi() || | |
| 1229 use->is_CheckCastPP() || | |
|
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1230 use->is_EncodeP() || |
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1231 use->is_DecodeN() || |
| 65 | 1232 (use->is_ConstraintCast() && use->Opcode() == Op_CastPP)) { |
| 1233 alloc_worklist.append_if_missing(use); | |
|
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1234 #ifdef ASSERT |
|
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1235 } else if (use->is_Mem()) { |
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1236 assert(use->in(MemNode::Address) != n, "EA: missing allocation reference path"); |
|
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1237 } else if (use->is_MergeMem()) { |
|
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1238 assert(_mergemem_worklist.contains(use->as_MergeMem()), "EA: missing MergeMem node in the worklist"); |
|
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1239 } else if (use->is_SafePoint()) { |
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1240 // Look for MergeMem nodes for calls which reference unique allocation |
|
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1241 // (through CheckCastPP nodes) even for debug info. |
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1242 Node* m = use->in(TypeFunc::Memory); |
|
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1243 if (m->is_MergeMem()) { |
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1244 assert(_mergemem_worklist.contains(m->as_MergeMem()), "EA: missing MergeMem node in the worklist"); |
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1245 } |
|
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1246 } else { |
|
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1247 uint op = use->Opcode(); |
|
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1248 if (!(op == Op_CmpP || op == Op_Conv2B || |
|
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1249 op == Op_CastP2X || op == Op_StoreCM || |
|
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1250 op == Op_FastLock || op == Op_AryEq || op == Op_StrComp || |
|
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1251 op == Op_StrEquals || op == Op_StrIndexOf)) { |
|
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1252 n->dump(); |
|
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1253 use->dump(); |
|
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1254 assert(false, "EA: missing allocation reference path"); |
|
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1255 } |
|
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|
1256 #endif |
| 0 | 1257 } |
| 1258 } | |
| 1259 | |
| 1260 } | |
| 65 | 1261 // New alias types were created in split_AddP(). |
| 0 | 1262 uint new_index_end = (uint) _compile->num_alias_types(); |
| 1263 | |
| 1264 // Phase 2: Process MemNode's from memnode_worklist. compute new address type and | |
| 1265 // compute new values for Memory inputs (the Memory inputs are not | |
| 1266 // actually updated until phase 4.) | |
| 1267 if (memnode_worklist.length() == 0) | |
| 1268 return; // nothing to do | |
| 1269 | |
| 1270 while (memnode_worklist.length() != 0) { | |
| 1271 Node *n = memnode_worklist.pop(); | |
| 65 | 1272 if (visited.test_set(n->_idx)) |
| 1273 continue; | |
|
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1274 if (n->is_Phi() || n->is_ClearArray()) { |
|
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1275 // we don't need to do anything, but the users must be pushed |
|
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1276 } else if (n->is_MemBar()) { // Initialize, MemBar nodes |
|
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1277 // we don't need to do anything, but the users must be pushed |
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1278 n = n->as_MemBar()->proj_out(TypeFunc::Memory); |
| 65 | 1279 if (n == NULL) |
| 0 | 1280 continue; |
| 1281 } else { | |
| 1282 assert(n->is_Mem(), "memory node required."); | |
| 1283 Node *addr = n->in(MemNode::Address); | |
| 1284 const Type *addr_t = igvn->type(addr); | |
| 1285 if (addr_t == Type::TOP) | |
| 1286 continue; | |
| 1287 assert (addr_t->isa_ptr() != NULL, "pointer type required."); | |
| 1288 int alias_idx = _compile->get_alias_index(addr_t->is_ptr()); | |
| 65 | 1289 assert ((uint)alias_idx < new_index_end, "wrong alias index"); |
| 1290 Node *mem = find_inst_mem(n->in(MemNode::Memory), alias_idx, orig_phis, igvn); | |
|
38
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1291 if (_compile->failing()) { |
|
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1292 return; |
|
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1293 } |
| 65 | 1294 if (mem != n->in(MemNode::Memory)) { |
|
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1295 // We delay the memory edge update since we need old one in |
|
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1296 // MergeMem code below when instances memory slices are separated. |
|
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1297 debug_only(Node* pn = ptnode_adr(n->_idx)->_node;) |
|
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1298 assert(pn == NULL || pn == n, "wrong node"); |
| 0 | 1299 set_map(n->_idx, mem); |
|
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1300 ptnode_adr(n->_idx)->_node = n; |
| 65 | 1301 } |
| 0 | 1302 if (n->is_Load()) { |
| 1303 continue; // don't push users | |
| 1304 } else if (n->is_LoadStore()) { | |
| 1305 // get the memory projection | |
| 1306 for (DUIterator_Fast imax, i = n->fast_outs(imax); i < imax; i++) { | |
| 1307 Node *use = n->fast_out(i); | |
| 1308 if (use->Opcode() == Op_SCMemProj) { | |
| 1309 n = use; | |
| 1310 break; | |
| 1311 } | |
| 1312 } | |
| 1313 assert(n->Opcode() == Op_SCMemProj, "memory projection required"); | |
| 1314 } | |
| 1315 } | |
| 1316 // push user on appropriate worklist | |
| 1317 for (DUIterator_Fast imax, i = n->fast_outs(imax); i < imax; i++) { | |
| 1318 Node *use = n->fast_out(i); | |
|
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1319 if (use->is_Phi() || use->is_ClearArray()) { |
| 65 | 1320 memnode_worklist.append_if_missing(use); |
| 0 | 1321 } else if(use->is_Mem() && use->in(MemNode::Memory) == n) { |
|
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1322 if (use->Opcode() == Op_StoreCM) // Ignore cardmark stores |
|
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1323 continue; |
| 65 | 1324 memnode_worklist.append_if_missing(use); |
|
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1325 } else if (use->is_MemBar()) { |
| 65 | 1326 memnode_worklist.append_if_missing(use); |
|
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1327 #ifdef ASSERT |
|
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1328 } else if(use->is_Mem()) { |
|
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1329 assert(use->in(MemNode::Memory) != n, "EA: missing memory path"); |
| 0 | 1330 } else if (use->is_MergeMem()) { |
|
1100
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1331 assert(_mergemem_worklist.contains(use->as_MergeMem()), "EA: missing MergeMem node in the worklist"); |
|
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1332 } else { |
|
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1333 uint op = use->Opcode(); |
|
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1334 if (!(op == Op_StoreCM || |
|
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1335 (op == Op_CallLeaf && use->as_CallLeaf()->_name != NULL && |
|
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1336 strcmp(use->as_CallLeaf()->_name, "g1_wb_pre") == 0) || |
|
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1337 op == Op_AryEq || op == Op_StrComp || |
|
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1338 op == Op_StrEquals || op == Op_StrIndexOf)) { |
|
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1339 n->dump(); |
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1340 use->dump(); |
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1341 assert(false, "EA: missing memory path"); |
|
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1342 } |
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1343 #endif |
| 0 | 1344 } |
| 1345 } | |
| 1346 } | |
| 1347 | |
| 65 | 1348 // Phase 3: Process MergeMem nodes from mergemem_worklist. |
|
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1349 // Walk each memory slice moving the first node encountered of each |
| 65 | 1350 // instance type to the the input corresponding to its alias index. |
|
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1351 uint length = _mergemem_worklist.length(); |
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1352 for( uint next = 0; next < length; ++next ) { |
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1353 MergeMemNode* nmm = _mergemem_worklist.at(next); |
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1354 assert(!visited.test_set(nmm->_idx), "should not be visited before"); |
| 0 | 1355 // Note: we don't want to use MergeMemStream here because we only want to |
|
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1356 // scan inputs which exist at the start, not ones we add during processing. |
|
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1357 // Note 2: MergeMem may already contains instance memory slices added |
|
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1358 // during find_inst_mem() call when memory nodes were processed above. |
|
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1359 igvn->hash_delete(nmm); |
| 0 | 1360 uint nslices = nmm->req(); |
| 1361 for (uint i = Compile::AliasIdxRaw+1; i < nslices; i++) { | |
| 65 | 1362 Node* mem = nmm->in(i); |
| 1363 Node* cur = NULL; | |
| 0 | 1364 if (mem == NULL || mem->is_top()) |
| 1365 continue; | |
|
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1366 // First, update mergemem by moving memory nodes to corresponding slices |
|
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1367 // if their type became more precise since this mergemem was created. |
| 0 | 1368 while (mem->is_Mem()) { |
| 1369 const Type *at = igvn->type(mem->in(MemNode::Address)); | |
| 1370 if (at != Type::TOP) { | |
| 1371 assert (at->isa_ptr() != NULL, "pointer type required."); | |
| 1372 uint idx = (uint)_compile->get_alias_index(at->is_ptr()); | |
| 1373 if (idx == i) { | |
| 1374 if (cur == NULL) | |
| 1375 cur = mem; | |
| 1376 } else { | |
| 1377 if (idx >= nmm->req() || nmm->is_empty_memory(nmm->in(idx))) { | |
| 1378 nmm->set_memory_at(idx, mem); | |
| 1379 } | |
| 1380 } | |
| 1381 } | |
| 1382 mem = mem->in(MemNode::Memory); | |
| 1383 } | |
| 1384 nmm->set_memory_at(i, (cur != NULL) ? cur : mem); | |
| 65 | 1385 // Find any instance of the current type if we haven't encountered |
|
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1386 // already a memory slice of the instance along the memory chain. |
| 65 | 1387 for (uint ni = new_index_start; ni < new_index_end; ni++) { |
| 1388 if((uint)_compile->get_general_index(ni) == i) { | |
| 1389 Node *m = (ni >= nmm->req()) ? nmm->empty_memory() : nmm->in(ni); | |
| 1390 if (nmm->is_empty_memory(m)) { | |
| 1391 Node* result = find_inst_mem(mem, ni, orig_phis, igvn); | |
| 1392 if (_compile->failing()) { | |
| 1393 return; | |
| 1394 } | |
| 1395 nmm->set_memory_at(ni, result); | |
| 1396 } | |
| 1397 } | |
| 1398 } | |
| 1399 } | |
| 1400 // Find the rest of instances values | |
| 1401 for (uint ni = new_index_start; ni < new_index_end; ni++) { | |
|
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1402 const TypeOopPtr *tinst = _compile->get_adr_type(ni)->isa_oopptr(); |
| 65 | 1403 Node* result = step_through_mergemem(nmm, ni, tinst); |
| 1404 if (result == nmm->base_memory()) { | |
| 1405 // Didn't find instance memory, search through general slice recursively. | |
|
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1406 result = nmm->memory_at(_compile->get_general_index(ni)); |
| 65 | 1407 result = find_inst_mem(result, ni, orig_phis, igvn); |
| 1408 if (_compile->failing()) { | |
| 1409 return; | |
| 1410 } | |
| 1411 nmm->set_memory_at(ni, result); | |
| 1412 } | |
| 1413 } | |
| 1414 igvn->hash_insert(nmm); | |
| 1415 record_for_optimizer(nmm); | |
| 0 | 1416 } |
| 1417 | |
| 65 | 1418 // Phase 4: Update the inputs of non-instance memory Phis and |
| 1419 // the Memory input of memnodes | |
| 0 | 1420 // First update the inputs of any non-instance Phi's from |
| 1421 // which we split out an instance Phi. Note we don't have | |
| 1422 // to recursively process Phi's encounted on the input memory | |
| 1423 // chains as is done in split_memory_phi() since they will | |
| 1424 // also be processed here. | |
| 247 | 1425 for (int j = 0; j < orig_phis.length(); j++) { |
| 1426 PhiNode *phi = orig_phis.at(j); | |
| 0 | 1427 int alias_idx = _compile->get_alias_index(phi->adr_type()); |
| 1428 igvn->hash_delete(phi); | |
| 1429 for (uint i = 1; i < phi->req(); i++) { | |
| 1430 Node *mem = phi->in(i); | |
| 65 | 1431 Node *new_mem = find_inst_mem(mem, alias_idx, orig_phis, igvn); |
| 1432 if (_compile->failing()) { | |
| 1433 return; | |
| 1434 } | |
| 0 | 1435 if (mem != new_mem) { |
| 1436 phi->set_req(i, new_mem); | |
| 1437 } | |
| 1438 } | |
| 1439 igvn->hash_insert(phi); | |
| 1440 record_for_optimizer(phi); | |
| 1441 } | |
| 1442 | |
| 1443 // Update the memory inputs of MemNodes with the value we computed | |
|
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1444 // in Phase 2 and move stores memory users to corresponding memory slices. |
|
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1445 |
|
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1446 // Disable memory split verification code until the fix for 6984348. |
|
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1447 // Currently it produces false negative results since it does not cover all cases. |
|
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|
1448 #if 0 // ifdef ASSERT |
| 2249 | 1449 visited.Reset(); |
|
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1450 Node_Stack old_mems(arena, _compile->unique() >> 2); |
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1451 #endif |
|
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1452 for (uint i = 0; i < nodes_size(); i++) { |
| 0 | 1453 Node *nmem = get_map(i); |
| 1454 if (nmem != NULL) { | |
|
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1455 Node *n = ptnode_adr(i)->_node; |
|
1101
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|
1456 assert(n != NULL, "sanity"); |
|
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1457 if (n->is_Mem()) { |
|
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|
1458 #if 0 // ifdef ASSERT |
|
1101
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|
1459 Node* old_mem = n->in(MemNode::Memory); |
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1460 if (!visited.test_set(old_mem->_idx)) { |
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|
1461 old_mems.push(old_mem, old_mem->outcnt()); |
|
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1462 } |
|
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|
1463 #endif |
|
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|
1464 assert(n->in(MemNode::Memory) != nmem, "sanity"); |
|
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1465 if (!n->is_Load()) { |
|
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|
1466 // Move memory users of a store first. |
|
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|
1467 move_inst_mem(n, orig_phis, igvn); |
|
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|
1468 } |
|
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|
1469 // Now update memory input |
| 0 | 1470 igvn->hash_delete(n); |
| 1471 n->set_req(MemNode::Memory, nmem); | |
| 1472 igvn->hash_insert(n); | |
| 1473 record_for_optimizer(n); | |
|
1101
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1474 } else { |
|
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|
1475 assert(n->is_Allocate() || n->is_CheckCastPP() || |
|
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1476 n->is_AddP() || n->is_Phi(), "unknown node used for set_map()"); |
| 0 | 1477 } |
| 1478 } | |
| 1479 } | |
|
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|
1480 #if 0 // ifdef ASSERT |
|
1101
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|
1481 // Verify that memory was split correctly |
|
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1482 while (old_mems.is_nonempty()) { |
|
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1483 Node* old_mem = old_mems.node(); |
|
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|
1484 uint old_cnt = old_mems.index(); |
|
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|
1485 old_mems.pop(); |
|
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|
1486 assert(old_cnt == old_mem->outcnt(), "old mem could be lost"); |
|
1101
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|
1487 } |
|
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|
1488 #endif |
| 0 | 1489 } |
| 1490 | |
|
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1491 bool ConnectionGraph::has_candidates(Compile *C) { |
|
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1492 // EA brings benefits only when the code has allocations and/or locks which |
|
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1493 // are represented by ideal Macro nodes. |
|
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|
1494 int cnt = C->macro_count(); |
|
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1495 for( int i=0; i < cnt; i++ ) { |
|
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|
1496 Node *n = C->macro_node(i); |
|
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1497 if ( n->is_Allocate() ) |
|
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|
1498 return true; |
|
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1499 if( n->is_Lock() ) { |
|
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1500 Node* obj = n->as_Lock()->obj_node()->uncast(); |
|
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1501 if( !(obj->is_Parm() || obj->is_Con()) ) |
|
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1502 return true; |
|
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|
1503 } |
|
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|
1504 } |
|
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|
1505 return false; |
|
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|
1506 } |
|
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|
1507 |
|
1634
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|
1508 void ConnectionGraph::do_analysis(Compile *C, PhaseIterGVN *igvn) { |
|
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|
1509 // Add ConP#NULL and ConN#NULL nodes before ConnectionGraph construction |
|
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|
1510 // to create space for them in ConnectionGraph::_nodes[]. |
|
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|
1511 Node* oop_null = igvn->zerocon(T_OBJECT); |
|
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|
1512 Node* noop_null = igvn->zerocon(T_NARROWOOP); |
|
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|
1513 |
|
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|
1514 ConnectionGraph* congraph = new(C->comp_arena()) ConnectionGraph(C, igvn); |
|
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|
1515 // Perform escape analysis |
|
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|
1516 if (congraph->compute_escape()) { |
|
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|
1517 // There are non escaping objects. |
|
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|
1518 C->set_congraph(congraph); |
|
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|
1519 } |
|
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|
1520 |
|
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|
1521 // Cleanup. |
|
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|
1522 if (oop_null->outcnt() == 0) |
|
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|
1523 igvn->hash_delete(oop_null); |
|
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1524 if (noop_null->outcnt() == 0) |
|
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1525 igvn->hash_delete(noop_null); |
|
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1526 } |
|
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1527 |
|
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1528 bool ConnectionGraph::compute_escape() { |
|
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1529 Compile* C = _compile; |
| 65 | 1530 |
| 163 | 1531 // 1. Populate Connection Graph (CG) with Ideal nodes. |
| 65 | 1532 |
| 1533 Unique_Node_List worklist_init; | |
|
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1534 worklist_init.map(C->unique(), NULL); // preallocate space |
| 65 | 1535 |
| 1536 // Initialize worklist | |
|
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1537 if (C->root() != NULL) { |
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1538 worklist_init.push(C->root()); |
| 65 | 1539 } |
| 1540 | |
|
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1541 GrowableArray<Node*> alloc_worklist; |
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1542 GrowableArray<Node*> addp_worklist; |
|
1634
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1543 PhaseGVN* igvn = _igvn; |
| 65 | 1544 bool has_allocations = false; |
| 1545 | |
| 1546 // Push all useful nodes onto CG list and set their type. | |
| 1547 for( uint next = 0; next < worklist_init.size(); ++next ) { | |
| 1548 Node* n = worklist_init.at(next); | |
| 1549 record_for_escape_analysis(n, igvn); | |
|
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1550 // Only allocations and java static calls results are checked |
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1551 // for an escape status. See process_call_result() below. |
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1552 if (n->is_Allocate() || n->is_CallStaticJava() && |
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1553 ptnode_adr(n->_idx)->node_type() == PointsToNode::JavaObject) { |
| 65 | 1554 has_allocations = true; |
|
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1555 if (n->is_Allocate()) |
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1556 alloc_worklist.append(n); |
| 65 | 1557 } |
|
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1558 if(n->is_AddP()) { |
| 1921 | 1559 // Collect address nodes. Use them during stage 3 below |
| 1560 // to build initial connection graph field edges. | |
|
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1561 addp_worklist.append(n); |
|
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1562 } else if (n->is_MergeMem()) { |
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1563 // Collect all MergeMem nodes to add memory slices for |
|
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1564 // scalar replaceable objects in split_unique_types(). |
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1565 _mergemem_worklist.append(n->as_MergeMem()); |
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1566 } |
| 65 | 1567 for (DUIterator_Fast imax, i = n->fast_outs(imax); i < imax; i++) { |
| 1568 Node* m = n->fast_out(i); // Get user | |
| 1569 worklist_init.push(m); | |
| 1570 } | |
| 1571 } | |
| 0 | 1572 |
|
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1573 if (!has_allocations) { |
| 65 | 1574 _collecting = false; |
|
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1575 return false; // Nothing to do. |
| 65 | 1576 } |
| 1577 | |
| 1578 // 2. First pass to create simple CG edges (doesn't require to walk CG). | |
|
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1579 uint delayed_size = _delayed_worklist.size(); |
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1580 for( uint next = 0; next < delayed_size; ++next ) { |
| 65 | 1581 Node* n = _delayed_worklist.at(next); |
| 1582 build_connection_graph(n, igvn); | |
| 1583 } | |
| 0 | 1584 |
| 1921 | 1585 // 3. Pass to create initial fields edges (JavaObject -F-> AddP) |
| 1586 // to reduce number of iterations during stage 4 below. | |
|
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1587 uint addp_length = addp_worklist.length(); |
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1588 for( uint next = 0; next < addp_length; ++next ) { |
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1589 Node* n = addp_worklist.at(next); |
| 1921 | 1590 Node* base = get_addp_base(n); |
| 1591 if (base->is_Proj()) | |
| 1592 base = base->in(0); | |
| 1593 PointsToNode::NodeType nt = ptnode_adr(base->_idx)->node_type(); | |
| 1594 if (nt == PointsToNode::JavaObject) { | |
| 1595 build_connection_graph(n, igvn); | |
| 1596 } | |
| 65 | 1597 } |
| 1598 | |
|
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1599 GrowableArray<int> cg_worklist; |
| 65 | 1600 cg_worklist.append(_phantom_object); |
| 1921 | 1601 GrowableArray<uint> worklist; |
| 65 | 1602 |
| 1603 // 4. Build Connection Graph which need | |
| 1604 // to walk the connection graph. | |
| 1921 | 1605 _progress = false; |
|
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1606 for (uint ni = 0; ni < nodes_size(); ni++) { |
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1607 PointsToNode* ptn = ptnode_adr(ni); |
| 65 | 1608 Node *n = ptn->_node; |
| 1609 if (n != NULL) { // Call, AddP, LoadP, StoreP | |
| 1610 build_connection_graph(n, igvn); | |
| 1611 if (ptn->node_type() != PointsToNode::UnknownType) | |
| 1612 cg_worklist.append(n->_idx); // Collect CG nodes | |
| 1921 | 1613 if (!_processed.test(n->_idx)) |
| 1614 worklist.append(n->_idx); // Collect C/A/L/S nodes | |
| 65 | 1615 } |
| 0 | 1616 } |
| 1617 | |
| 1921 | 1618 // After IGVN user nodes may have smaller _idx than |
| 1619 // their inputs so they will be processed first in | |
| 1620 // previous loop. Because of that not all Graph | |
| 1621 // edges will be created. Walk over interesting | |
| 1622 // nodes again until no new edges are created. | |
| 1623 // | |
| 1624 // Normally only 1-3 passes needed to build | |
| 1625 // Connection Graph depending on graph complexity. | |
|
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1626 // Observed 8 passes in jvm2008 compiler.compiler. |
|
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1627 // Set limit to 20 to catch situation when something |
| 1921 | 1628 // did go wrong and recompile the method without EA. |
| 1629 | |
|
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1630 #define CG_BUILD_ITER_LIMIT 20 |
| 1921 | 1631 |
| 1632 uint length = worklist.length(); | |
| 1633 int iterations = 0; | |
| 1634 while(_progress && (iterations++ < CG_BUILD_ITER_LIMIT)) { | |
| 1635 _progress = false; | |
| 1636 for( uint next = 0; next < length; ++next ) { | |
| 1637 int ni = worklist.at(next); | |
| 1638 PointsToNode* ptn = ptnode_adr(ni); | |
| 1639 Node* n = ptn->_node; | |
| 1640 assert(n != NULL, "should be known node"); | |
| 1641 build_connection_graph(n, igvn); | |
| 1642 } | |
| 1643 } | |
| 1644 if (iterations >= CG_BUILD_ITER_LIMIT) { | |
| 1645 assert(iterations < CG_BUILD_ITER_LIMIT, | |
| 1646 err_msg("infinite EA connection graph build with %d nodes and worklist size %d", | |
| 1647 nodes_size(), length)); | |
| 1648 // Possible infinite build_connection_graph loop, | |
| 1649 // retry compilation without escape analysis. | |
| 1650 C->record_failure(C2Compiler::retry_no_escape_analysis()); | |
| 1651 _collecting = false; | |
| 1652 return false; | |
| 1653 } | |
| 1654 #undef CG_BUILD_ITER_LIMIT | |
| 1655 | |
|
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1656 Arena* arena = Thread::current()->resource_area(); |
|
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1657 VectorSet visited(arena); |
|
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1658 |
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1659 // 5. Find fields initializing values for not escaped allocations |
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1660 uint alloc_length = alloc_worklist.length(); |
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1661 for (uint next = 0; next < alloc_length; ++next) { |
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|
1662 Node* n = alloc_worklist.at(next); |
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1663 if (ptnode_adr(n->_idx)->escape_state() == PointsToNode::NoEscape) { |
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|
1664 find_init_values(n, &visited, igvn); |
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|
1665 } |
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|
1666 } |
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|
1667 |
| 1921 | 1668 worklist.clear(); |
| 0 | 1669 |
|
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1670 // 6. Remove deferred edges from the graph. |
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|
1671 uint cg_length = cg_worklist.length(); |
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1672 for (uint next = 0; next < cg_length; ++next) { |
| 65 | 1673 int ni = cg_worklist.at(next); |
|
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1674 PointsToNode* ptn = ptnode_adr(ni); |
| 0 | 1675 PointsToNode::NodeType nt = ptn->node_type(); |
| 1676 if (nt == PointsToNode::LocalVar || nt == PointsToNode::Field) { | |
| 1921 | 1677 remove_deferred(ni, &worklist, &visited); |
|
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1678 Node *n = ptn->_node; |
| 0 | 1679 } |
| 1680 } | |
| 65 | 1681 |
|
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1682 // 7. Adjust escape state of nonescaping objects. |
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1683 for (uint next = 0; next < addp_length; ++next) { |
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1684 Node* n = addp_worklist.at(next); |
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|
1685 adjust_escape_state(n); |
| 0 | 1686 } |
| 1687 | |
|
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1688 // 8. Propagate escape states. |
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|
1689 worklist.clear(); |
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|
1690 |
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|
1691 // mark all nodes reachable from GlobalEscape nodes |
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|
1692 (void)propagate_escape_state(&cg_worklist, &worklist, PointsToNode::GlobalEscape); |
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1693 |
|
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1694 // mark all nodes reachable from ArgEscape nodes |
|
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|
1695 bool has_non_escaping_obj = propagate_escape_state(&cg_worklist, &worklist, PointsToNode::ArgEscape); |
|
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1696 |
| 65 | 1697 // push all NoEscape nodes on the worklist |
|
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1698 for( uint next = 0; next < cg_length; ++next ) { |
| 65 | 1699 int nk = cg_worklist.at(next); |
|
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1700 if (ptnode_adr(nk)->escape_state() == PointsToNode::NoEscape) |
| 65 | 1701 worklist.push(nk); |
| 1702 } | |
|
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1703 alloc_worklist.clear(); |
|
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1704 // mark all nodes reachable from NoEscape nodes |
| 65 | 1705 while(worklist.length() > 0) { |
|
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|
1706 uint nk = worklist.pop(); |
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|
1707 PointsToNode* ptn = ptnode_adr(nk); |
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1708 if (ptn->node_type() == PointsToNode::JavaObject && |
|
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|
1709 !(nk == _noop_null || nk == _oop_null)) |
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1710 has_non_escaping_obj = true; // Non Escape |
|
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1711 Node* n = ptn->_node; |
|
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1712 bool scalar_replaceable = ptn->scalar_replaceable(); |
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1713 if (n->is_Allocate() && scalar_replaceable) { |
| 605 | 1714 // Push scalar replaceable allocations on alloc_worklist |
|
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|
1715 // for processing in split_unique_types(). Note, |
|
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1716 // following code may change scalar_replaceable value. |
|
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1717 alloc_worklist.append(n); |
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1718 } |
|
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1719 uint e_cnt = ptn->edge_count(); |
|
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1720 for (uint ei = 0; ei < e_cnt; ei++) { |
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1721 uint npi = ptn->edge_target(ei); |
| 65 | 1722 PointsToNode *np = ptnode_adr(npi); |
| 1723 if (np->escape_state() < PointsToNode::NoEscape) { | |
|
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|
1724 set_escape_state(npi, PointsToNode::NoEscape); |
|
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1725 if (!scalar_replaceable) { |
|
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|
1726 np->set_scalar_replaceable(false); |
|
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1727 } |
|
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1728 worklist.push(npi); |
|
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1729 } else if (np->scalar_replaceable() && !scalar_replaceable) { |
|
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1730 // Propagate scalar_replaceable value. |
|
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1731 np->set_scalar_replaceable(false); |
|
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1732 worklist.push(npi); |
| 65 | 1733 } |
| 1734 } | |
| 1735 } | |
| 1736 | |
| 0 | 1737 _collecting = false; |
|
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1738 assert(C->unique() == nodes_size(), "there should be no new ideal nodes during ConnectionGraph build"); |
| 0 | 1739 |
|
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1740 assert(ptnode_adr(_oop_null)->escape_state() == PointsToNode::NoEscape, "sanity"); |
|
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1741 if (UseCompressedOops) { |
|
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1742 assert(ptnode_adr(_noop_null)->escape_state() == PointsToNode::NoEscape, "sanity"); |
|
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1743 } |
|
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|
1744 |
|
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1745 if (EliminateLocks && has_non_escaping_obj) { |
|
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|
1746 // Mark locks before changing ideal graph. |
|
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1747 int cnt = C->macro_count(); |
|
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1748 for( int i=0; i < cnt; i++ ) { |
|
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1749 Node *n = C->macro_node(i); |
|
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1750 if (n->is_AbstractLock()) { // Lock and Unlock nodes |
|
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|
1751 AbstractLockNode* alock = n->as_AbstractLock(); |
|
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1752 if (!alock->is_eliminated()) { |
|
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1753 PointsToNode::EscapeState es = escape_state(alock->obj_node()); |
|
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1754 assert(es != PointsToNode::UnknownEscape, "should know"); |
|
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1755 if (es != PointsToNode::UnknownEscape && es != PointsToNode::GlobalEscape) { |
|
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|
1756 // Mark it eliminated |
|
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|
1757 alock->set_eliminated(); |
|
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|
1758 } |
|
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|
1759 } |
|
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|
1760 } |
|
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|
1761 } |
|
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|
1762 } |
|
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|
1763 |
|
1634
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1764 #ifndef PRODUCT |
|
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1765 if (PrintEscapeAnalysis) { |
|
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|
1766 dump(); // Dump ConnectionGraph |
|
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|
1767 } |
|
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|
1768 #endif |
|
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|
1769 |
|
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|
1770 bool has_scalar_replaceable_candidates = false; |
|
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1771 alloc_length = alloc_worklist.length(); |
|
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1772 for (uint next = 0; next < alloc_length; ++next) { |
|
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|
1773 Node* n = alloc_worklist.at(next); |
|
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|
1774 PointsToNode* ptn = ptnode_adr(n->_idx); |
|
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1775 assert(ptn->escape_state() == PointsToNode::NoEscape, "sanity"); |
|
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1776 if (ptn->scalar_replaceable()) { |
|
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|
1777 has_scalar_replaceable_candidates = true; |
|
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|
1778 break; |
|
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|
1779 } |
|
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|
1780 } |
|
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|
1781 |
|
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1782 if ( has_scalar_replaceable_candidates && |
|
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1783 C->AliasLevel() >= 3 && EliminateAllocations ) { |
| 0 | 1784 |
|
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1785 // Now use the escape information to create unique types for |
|
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|
1786 // scalar replaceable objects. |
|
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|
1787 split_unique_types(alloc_worklist); |
| 0 | 1788 |
|
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1789 if (C->failing()) return false; |
| 0 | 1790 |
|
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1791 C->print_method("After Escape Analysis", 2); |
| 0 | 1792 |
| 65 | 1793 #ifdef ASSERT |
|
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1794 } else if (Verbose && (PrintEscapeAnalysis || PrintEliminateAllocations)) { |
| 65 | 1795 tty->print("=== No allocations eliminated for "); |
|
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1796 C->method()->print_short_name(); |
| 65 | 1797 if(!EliminateAllocations) { |
| 1798 tty->print(" since EliminateAllocations is off ==="); | |
|
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1799 } else if(!has_scalar_replaceable_candidates) { |
|
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|
1800 tty->print(" since there are no scalar replaceable candidates ==="); |
|
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|
1801 } else if(C->AliasLevel() < 3) { |
| 65 | 1802 tty->print(" since AliasLevel < 3 ==="); |
| 0 | 1803 } |
| 65 | 1804 tty->cr(); |
| 1805 #endif | |
| 0 | 1806 } |
|
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1807 return has_non_escaping_obj; |
| 0 | 1808 } |
| 1809 | |
|
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1810 // Find fields initializing values for allocations. |
|
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1811 void ConnectionGraph::find_init_values(Node* alloc, VectorSet* visited, PhaseTransform* phase) { |
|
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1812 assert(alloc->is_Allocate(), "Should be called for Allocate nodes only"); |
|
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1813 PointsToNode* pta = ptnode_adr(alloc->_idx); |
|
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|
1814 assert(pta->escape_state() == PointsToNode::NoEscape, "Not escaped Allocate nodes only"); |
|
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|
1815 InitializeNode* ini = alloc->as_Allocate()->initialization(); |
|
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1816 |
|
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|
1817 Compile* C = _compile; |
|
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|
1818 visited->Reset(); |
|
1100
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1819 // Check if a oop field's initializing value is recorded and add |
|
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1820 // a corresponding NULL field's value if it is not recorded. |
|
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1821 // Connection Graph does not record a default initialization by NULL |
|
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1822 // captured by Initialize node. |
|
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|
1823 // |
|
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|
1824 uint ae_cnt = pta->edge_count(); |
|
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1825 for (uint ei = 0; ei < ae_cnt; ei++) { |
|
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|
1826 uint nidx = pta->edge_target(ei); // Field (AddP) |
|
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|
1827 PointsToNode* ptn = ptnode_adr(nidx); |
|
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|
1828 assert(ptn->_node->is_AddP(), "Should be AddP nodes only"); |
|
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|
1829 int offset = ptn->offset(); |
|
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1830 if (offset != Type::OffsetBot && |
|
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|
1831 offset != oopDesc::klass_offset_in_bytes() && |
|
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|
1832 !visited->test_set(offset)) { |
|
1100
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1833 |
|
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|
1834 // Check only oop fields. |
|
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|
1835 const Type* adr_type = ptn->_node->as_AddP()->bottom_type(); |
|
1100
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|
1836 BasicType basic_field_type = T_INT; |
|
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|
1837 if (adr_type->isa_instptr()) { |
|
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|
1838 ciField* field = C->alias_type(adr_type->isa_instptr())->field(); |
|
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|
1839 if (field != NULL) { |
|
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|
1840 basic_field_type = field->layout_type(); |
|
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|
1841 } else { |
|
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|
1842 // Ignore non field load (for example, klass load) |
|
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|
1843 } |
|
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|
1844 } else if (adr_type->isa_aryptr()) { |
|
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|
1845 if (offset != arrayOopDesc::length_offset_in_bytes()) { |
|
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|
1846 const Type* elemtype = adr_type->isa_aryptr()->elem(); |
|
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|
1847 basic_field_type = elemtype->array_element_basic_type(); |
|
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|
1848 } else { |
|
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|
1849 // Ignore array length load |
|
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|
1850 } |
|
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|
1851 #ifdef ASSERT |
|
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|
1852 } else { |
|
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|
1853 // Raw pointers are used for initializing stores so skip it |
|
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|
1854 // since it should be recorded already |
|
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|
1855 Node* base = get_addp_base(ptn->_node); |
|
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|
1856 assert(adr_type->isa_rawptr() && base->is_Proj() && |
|
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|
1857 (base->in(0) == alloc),"unexpected pointer type"); |
|
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|
1858 #endif |
|
1100
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|
1859 } |
|
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|
1860 if (basic_field_type == T_OBJECT || |
|
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|
1861 basic_field_type == T_NARROWOOP || |
|
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|
1862 basic_field_type == T_ARRAY) { |
|
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|
1863 Node* value = NULL; |
|
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1864 if (ini != NULL) { |
|
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|
1865 BasicType ft = UseCompressedOops ? T_NARROWOOP : T_OBJECT; |
|
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1866 Node* store = ini->find_captured_store(offset, type2aelembytes(ft), phase); |
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1867 if (store != NULL && store->is_Store()) { |
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1868 value = store->in(MemNode::ValueIn); |
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1869 } else if (ptn->edge_count() > 0) { // Are there oop stores? |
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1870 // Check for a store which follows allocation without branches. |
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1871 // For example, a volatile field store is not collected |
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1872 // by Initialize node. TODO: it would be nice to use idom() here. |
|
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1873 // |
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1874 // Search all references to the same field which use different |
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1875 // AddP nodes, for example, in the next case: |
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1876 // |
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1877 // Point p[] = new Point[1]; |
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1878 // if ( x ) { p[0] = new Point(); p[0].x = x; } |
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1879 // if ( p[0] != null ) { y = p[0].x; } // has CastPP |
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1880 // |
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1881 for (uint next = ei; (next < ae_cnt) && (value == NULL); next++) { |
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1882 uint fpi = pta->edge_target(next); // Field (AddP) |
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1883 PointsToNode *ptf = ptnode_adr(fpi); |
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1884 if (ptf->offset() == offset) { |
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1885 Node* nf = ptf->_node; |
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1886 for (DUIterator_Fast imax, i = nf->fast_outs(imax); i < imax; i++) { |
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1887 store = nf->fast_out(i); |
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1888 if (store->is_Store() && store->in(0) != NULL) { |
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1889 Node* ctrl = store->in(0); |
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1890 while(!(ctrl == ini || ctrl == alloc || ctrl == NULL || |
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1891 ctrl == C->root() || ctrl == C->top() || ctrl->is_Region() || |
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1892 ctrl->is_IfTrue() || ctrl->is_IfFalse())) { |
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1893 ctrl = ctrl->in(0); |
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1894 } |
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1895 if (ctrl == ini || ctrl == alloc) { |
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1896 value = store->in(MemNode::ValueIn); |
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1897 break; |
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1898 } |
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1899 } |
|
1100
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1900 } |
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1901 } |
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1902 } |
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1903 } |
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1904 } |
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1905 if (value == NULL || value != ptnode_adr(value->_idx)->_node) { |
|
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1906 // A field's initializing value was not recorded. Add NULL. |
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1907 uint null_idx = UseCompressedOops ? _noop_null : _oop_null; |
|
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1908 add_edge_from_fields(alloc->_idx, null_idx, offset); |
|
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1909 } |
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1910 } |
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1911 } |
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1912 } |
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1913 } |
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1914 |
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1915 // Adjust escape state after Connection Graph is built. |
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1916 void ConnectionGraph::adjust_escape_state(Node* n) { |
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1917 PointsToNode* ptn = ptnode_adr(n->_idx); |
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1918 assert(n->is_AddP(), "Should be called for AddP nodes only"); |
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1919 // Search for objects which are not scalar replaceable |
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1920 // and mark them to propagate the state to referenced objects. |
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1921 // |
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1922 |
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1923 int offset = ptn->offset(); |
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1924 Node* base = get_addp_base(n); |
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1925 VectorSet* ptset = PointsTo(base); |
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1926 int ptset_size = ptset->Size(); |
|
1100
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1927 |
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1928 // An object is not scalar replaceable if the field which may point |
|
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1929 // to it has unknown offset (unknown element of an array of objects). |
|
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1930 // |
|
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1931 |
|
1100
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1932 if (offset == Type::OffsetBot) { |
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1933 uint e_cnt = ptn->edge_count(); |
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1934 for (uint ei = 0; ei < e_cnt; ei++) { |
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1935 uint npi = ptn->edge_target(ei); |
|
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1936 ptnode_adr(npi)->set_scalar_replaceable(false); |
|
1100
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1937 } |
|
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1938 } |
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1939 |
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1940 // Currently an object is not scalar replaceable if a LoadStore node |
|
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1941 // access its field since the field value is unknown after it. |
|
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1942 // |
|
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1943 bool has_LoadStore = false; |
|
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1944 for (DUIterator_Fast imax, i = n->fast_outs(imax); i < imax; i++) { |
|
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1945 Node *use = n->fast_out(i); |
|
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1946 if (use->is_LoadStore()) { |
|
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1947 has_LoadStore = true; |
|
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1948 break; |
|
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|
1949 } |
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1950 } |
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1951 // An object is not scalar replaceable if the address points |
|
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1952 // to unknown field (unknown element for arrays, offset is OffsetBot). |
|
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1953 // |
|
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1954 // Or the address may point to more then one object. This may produce |
|
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1955 // the false positive result (set not scalar replaceable) |
|
1100
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1956 // since the flow-insensitive escape analysis can't separate |
|
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1957 // the case when stores overwrite the field's value from the case |
|
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1958 // when stores happened on different control branches. |
|
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1959 // |
|
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1960 // Note: it will disable scalar replacement in some cases: |
|
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|
1961 // |
|
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|
1962 // Point p[] = new Point[1]; |
|
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1963 // p[0] = new Point(); // Will be not scalar replaced |
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1964 // |
|
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|
1965 // but it will save us from incorrect optimizations in next cases: |
|
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|
1966 // |
|
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|
1967 // Point p[] = new Point[1]; |
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1968 // if ( x ) p[0] = new Point(); // Will be not scalar replaced |
|
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|
1969 // |
|
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1970 if (ptset_size > 1 || ptset_size != 0 && |
|
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1971 (has_LoadStore || offset == Type::OffsetBot)) { |
| 2249 | 1972 for( VectorSetI j(ptset); j.test(); ++j ) { |
|
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1973 ptnode_adr(j.elem)->set_scalar_replaceable(false); |
|
1100
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|
1974 } |
|
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|
1975 } |
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|
1976 } |
|
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|
1977 |
|
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1978 // Propagate escape states to referenced nodes. |
|
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1979 bool ConnectionGraph::propagate_escape_state(GrowableArray<int>* cg_worklist, |
|
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|
1980 GrowableArray<uint>* worklist, |
|
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|
1981 PointsToNode::EscapeState esc_state) { |
|
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|
1982 bool has_java_obj = false; |
|
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|
1983 |
|
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|
1984 // push all nodes with the same escape state on the worklist |
|
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1985 uint cg_length = cg_worklist->length(); |
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1986 for (uint next = 0; next < cg_length; ++next) { |
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1987 int nk = cg_worklist->at(next); |
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1988 if (ptnode_adr(nk)->escape_state() == esc_state) |
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1989 worklist->push(nk); |
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1990 } |
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1991 // mark all reachable nodes |
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1992 while (worklist->length() > 0) { |
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1993 PointsToNode* ptn = ptnode_adr(worklist->pop()); |
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1994 if (ptn->node_type() == PointsToNode::JavaObject) { |
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1995 has_java_obj = true; |
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1996 } |
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1997 uint e_cnt = ptn->edge_count(); |
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1998 for (uint ei = 0; ei < e_cnt; ei++) { |
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1999 uint npi = ptn->edge_target(ei); |
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2000 PointsToNode *np = ptnode_adr(npi); |
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2001 if (np->escape_state() < esc_state) { |
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2002 set_escape_state(npi, esc_state); |
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2003 worklist->push(npi); |
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2004 } |
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2005 } |
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2006 } |
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2007 // Has not escaping java objects |
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2008 return has_java_obj && (esc_state < PointsToNode::GlobalEscape); |
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2009 } |
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2010 |
| 0 | 2011 void ConnectionGraph::process_call_arguments(CallNode *call, PhaseTransform *phase) { |
| 2012 | |
| 2013 switch (call->Opcode()) { | |
| 65 | 2014 #ifdef ASSERT |
| 0 | 2015 case Op_Allocate: |
| 2016 case Op_AllocateArray: | |
| 2017 case Op_Lock: | |
| 2018 case Op_Unlock: | |
| 65 | 2019 assert(false, "should be done already"); |
| 0 | 2020 break; |
| 65 | 2021 #endif |
|
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2022 case Op_CallLeaf: |
| 65 | 2023 case Op_CallLeafNoFP: |
| 2024 { | |
| 2025 // Stub calls, objects do not escape but they are not scale replaceable. | |
| 2026 // Adjust escape state for outgoing arguments. | |
| 2027 const TypeTuple * d = call->tf()->domain(); | |
| 2028 for (uint i = TypeFunc::Parms; i < d->cnt(); i++) { | |
| 2029 const Type* at = d->field_at(i); | |
| 2030 Node *arg = call->in(i)->uncast(); | |
| 2031 const Type *aat = phase->type(arg); | |
|
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2032 if (!arg->is_top() && at->isa_ptr() && aat->isa_ptr() && |
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2033 ptnode_adr(arg->_idx)->escape_state() < PointsToNode::ArgEscape) { |
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2034 |
| 65 | 2035 assert(aat == Type::TOP || aat == TypePtr::NULL_PTR || |
| 2036 aat->isa_ptr() != NULL, "expecting an Ptr"); | |
|
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2037 #ifdef ASSERT |
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2038 if (!(call->Opcode() == Op_CallLeafNoFP && |
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2039 call->as_CallLeaf()->_name != NULL && |
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2040 (strstr(call->as_CallLeaf()->_name, "arraycopy") != 0) || |
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2041 call->as_CallLeaf()->_name != NULL && |
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2042 (strcmp(call->as_CallLeaf()->_name, "g1_wb_pre") == 0 || |
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2043 strcmp(call->as_CallLeaf()->_name, "g1_wb_post") == 0 )) |
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2044 ) { |
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2045 call->dump(); |
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2046 assert(false, "EA: unexpected CallLeaf"); |
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2047 } |
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2048 #endif |
| 65 | 2049 set_escape_state(arg->_idx, PointsToNode::ArgEscape); |
| 2050 if (arg->is_AddP()) { | |
| 2051 // | |
| 2052 // The inline_native_clone() case when the arraycopy stub is called | |
| 2053 // after the allocation before Initialize and CheckCastPP nodes. | |
| 2054 // | |
| 2055 // Set AddP's base (Allocate) as not scalar replaceable since | |
| 2056 // pointer to the base (with offset) is passed as argument. | |
| 2057 // | |
| 2058 arg = get_addp_base(arg); | |
| 2059 } | |
| 2249 | 2060 for( VectorSetI j(PointsTo(arg)); j.test(); ++j ) { |
| 65 | 2061 uint pt = j.elem; |
| 2062 set_escape_state(pt, PointsToNode::ArgEscape); | |
| 2063 } | |
| 2064 } | |
| 2065 } | |
| 2066 break; | |
| 2067 } | |
| 0 | 2068 |
| 2069 case Op_CallStaticJava: | |
| 2070 // For a static call, we know exactly what method is being called. | |
| 2071 // Use bytecode estimator to record the call's escape affects | |
| 2072 { | |
| 2073 ciMethod *meth = call->as_CallJava()->method(); | |
| 65 | 2074 BCEscapeAnalyzer *call_analyzer = (meth !=NULL) ? meth->get_bcea() : NULL; |
| 2075 // fall-through if not a Java method or no analyzer information | |
| 2076 if (call_analyzer != NULL) { | |
| 0 | 2077 const TypeTuple * d = call->tf()->domain(); |
| 65 | 2078 bool copy_dependencies = false; |
| 0 | 2079 for (uint i = TypeFunc::Parms; i < d->cnt(); i++) { |
| 2080 const Type* at = d->field_at(i); | |
| 2081 int k = i - TypeFunc::Parms; | |
|
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2082 Node *arg = call->in(i)->uncast(); |
| 0 | 2083 |
|
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2084 if (at->isa_oopptr() != NULL && |
|
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2085 ptnode_adr(arg->_idx)->escape_state() < PointsToNode::GlobalEscape) { |
| 0 | 2086 |
| 65 | 2087 bool global_escapes = false; |
| 2088 bool fields_escapes = false; | |
| 2089 if (!call_analyzer->is_arg_stack(k)) { | |
| 2090 // The argument global escapes, mark everything it could point to | |
| 2091 set_escape_state(arg->_idx, PointsToNode::GlobalEscape); | |
| 2092 global_escapes = true; | |
| 2093 } else { | |
| 2094 if (!call_analyzer->is_arg_local(k)) { | |
| 2095 // The argument itself doesn't escape, but any fields might | |
| 2096 fields_escapes = true; | |
| 0 | 2097 } |
| 65 | 2098 set_escape_state(arg->_idx, PointsToNode::ArgEscape); |
| 2099 copy_dependencies = true; | |
| 2100 } | |
| 2101 | |
| 2249 | 2102 for( VectorSetI j(PointsTo(arg)); j.test(); ++j ) { |
| 65 | 2103 uint pt = j.elem; |
| 2104 if (global_escapes) { | |
| 2105 //The argument global escapes, mark everything it could point to | |
| 2106 set_escape_state(pt, PointsToNode::GlobalEscape); | |
| 2107 } else { | |
| 2108 if (fields_escapes) { | |
| 2109 // The argument itself doesn't escape, but any fields might | |
| 2110 add_edge_from_fields(pt, _phantom_object, Type::OffsetBot); | |
| 2111 } | |
| 2112 set_escape_state(pt, PointsToNode::ArgEscape); | |
| 0 | 2113 } |
| 2114 } | |
| 2115 } | |
| 2116 } | |
| 65 | 2117 if (copy_dependencies) |
|
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2118 call_analyzer->copy_dependencies(_compile->dependencies()); |
| 0 | 2119 break; |
| 2120 } | |
| 2121 } | |
| 2122 | |
| 2123 default: | |
| 65 | 2124 // Fall-through here if not a Java method or no analyzer information |
| 2125 // or some other type of call, assume the worst case: all arguments | |
| 0 | 2126 // globally escape. |
| 2127 { | |
| 2128 // adjust escape state for outgoing arguments | |
| 2129 const TypeTuple * d = call->tf()->domain(); | |
| 2130 for (uint i = TypeFunc::Parms; i < d->cnt(); i++) { | |
| 2131 const Type* at = d->field_at(i); | |
| 2132 if (at->isa_oopptr() != NULL) { | |
| 65 | 2133 Node *arg = call->in(i)->uncast(); |
| 2134 set_escape_state(arg->_idx, PointsToNode::GlobalEscape); | |
| 2249 | 2135 for( VectorSetI j(PointsTo(arg)); j.test(); ++j ) { |
| 0 | 2136 uint pt = j.elem; |
| 2137 set_escape_state(pt, PointsToNode::GlobalEscape); | |
| 2138 } | |
| 2139 } | |
| 2140 } | |
| 2141 } | |
| 2142 } | |
| 2143 } | |
| 2144 void ConnectionGraph::process_call_result(ProjNode *resproj, PhaseTransform *phase) { | |
|
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2145 CallNode *call = resproj->in(0)->as_Call(); |
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2146 uint call_idx = call->_idx; |
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2147 uint resproj_idx = resproj->_idx; |
| 0 | 2148 |
| 2149 switch (call->Opcode()) { | |
| 2150 case Op_Allocate: | |
| 2151 { | |
| 2152 Node *k = call->in(AllocateNode::KlassNode); | |
|
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2153 const TypeKlassPtr *kt = k->bottom_type()->isa_klassptr(); |
| 0 | 2154 assert(kt != NULL, "TypeKlassPtr required."); |
| 2155 ciKlass* cik = kt->klass(); | |
| 2156 | |
| 65 | 2157 PointsToNode::EscapeState es; |
| 2158 uint edge_to; | |
|
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2159 if (cik->is_subclass_of(_compile->env()->Thread_klass()) || |
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2160 !cik->is_instance_klass() || // StressReflectiveCode |
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2161 cik->as_instance_klass()->has_finalizer()) { |
| 65 | 2162 es = PointsToNode::GlobalEscape; |
| 2163 edge_to = _phantom_object; // Could not be worse | |
| 0 | 2164 } else { |
| 65 | 2165 es = PointsToNode::NoEscape; |
|
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2166 edge_to = call_idx; |
|
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2167 assert(ptnode_adr(call_idx)->scalar_replaceable(), "sanity"); |
| 0 | 2168 } |
|
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2169 set_escape_state(call_idx, es); |
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2170 add_pointsto_edge(resproj_idx, edge_to); |
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2171 _processed.set(resproj_idx); |
| 0 | 2172 break; |
| 2173 } | |
| 2174 | |
| 2175 case Op_AllocateArray: | |
| 2176 { | |
|
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2177 |
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2178 Node *k = call->in(AllocateNode::KlassNode); |
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2179 const TypeKlassPtr *kt = k->bottom_type()->isa_klassptr(); |
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2180 assert(kt != NULL, "TypeKlassPtr required."); |
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2181 ciKlass* cik = kt->klass(); |
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2182 |
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2183 PointsToNode::EscapeState es; |
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2184 uint edge_to; |
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2185 if (!cik->is_array_klass()) { // StressReflectiveCode |
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2186 es = PointsToNode::GlobalEscape; |
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2187 edge_to = _phantom_object; |
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2188 } else { |
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2189 es = PointsToNode::NoEscape; |
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2190 edge_to = call_idx; |
|
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2191 assert(ptnode_adr(call_idx)->scalar_replaceable(), "sanity"); |
|
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2192 int length = call->in(AllocateNode::ALength)->find_int_con(-1); |
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2193 if (length < 0 || length > EliminateAllocationArraySizeLimit) { |
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2194 // Not scalar replaceable if the length is not constant or too big. |
|
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2195 ptnode_adr(call_idx)->set_scalar_replaceable(false); |
|
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2196 } |
| 65 | 2197 } |
|
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2198 set_escape_state(call_idx, es); |
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2199 add_pointsto_edge(resproj_idx, edge_to); |
|
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2200 _processed.set(resproj_idx); |
| 0 | 2201 break; |
| 2202 } | |
| 2203 | |
| 2204 case Op_CallStaticJava: | |
| 2205 // For a static call, we know exactly what method is being called. | |
| 2206 // Use bytecode estimator to record whether the call's return value escapes | |
| 2207 { | |
| 65 | 2208 bool done = true; |
| 0 | 2209 const TypeTuple *r = call->tf()->range(); |
| 2210 const Type* ret_type = NULL; | |
| 2211 | |
| 2212 if (r->cnt() > TypeFunc::Parms) | |
| 2213 ret_type = r->field_at(TypeFunc::Parms); | |
| 2214 | |
| 2215 // Note: we use isa_ptr() instead of isa_oopptr() here because the | |
| 2216 // _multianewarray functions return a TypeRawPtr. | |
| 65 | 2217 if (ret_type == NULL || ret_type->isa_ptr() == NULL) { |
|
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2218 _processed.set(resproj_idx); |
| 0 | 2219 break; // doesn't return a pointer type |
| 65 | 2220 } |
| 0 | 2221 ciMethod *meth = call->as_CallJava()->method(); |
| 65 | 2222 const TypeTuple * d = call->tf()->domain(); |
| 0 | 2223 if (meth == NULL) { |
| 2224 // not a Java method, assume global escape | |
|
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2225 set_escape_state(call_idx, PointsToNode::GlobalEscape); |
|
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2226 add_pointsto_edge(resproj_idx, _phantom_object); |
| 0 | 2227 } else { |
| 65 | 2228 BCEscapeAnalyzer *call_analyzer = meth->get_bcea(); |
| 2229 bool copy_dependencies = false; | |
| 0 | 2230 |
| 65 | 2231 if (call_analyzer->is_return_allocated()) { |
| 2232 // Returns a newly allocated unescaped object, simply | |
| 2233 // update dependency information. | |
| 2234 // Mark it as NoEscape so that objects referenced by | |
| 2235 // it's fields will be marked as NoEscape at least. | |
|
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2236 set_escape_state(call_idx, PointsToNode::NoEscape); |
|
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2237 ptnode_adr(call_idx)->set_scalar_replaceable(false); |
|
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2238 add_pointsto_edge(resproj_idx, call_idx); |
| 65 | 2239 copy_dependencies = true; |
|
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2240 } else if (call_analyzer->is_return_local()) { |
| 0 | 2241 // determine whether any arguments are returned |
|
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|
2242 set_escape_state(call_idx, PointsToNode::ArgEscape); |
|
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|
2243 bool ret_arg = false; |
| 0 | 2244 for (uint i = TypeFunc::Parms; i < d->cnt(); i++) { |
| 2245 const Type* at = d->field_at(i); | |
| 2246 | |
| 2247 if (at->isa_oopptr() != NULL) { | |
| 65 | 2248 Node *arg = call->in(i)->uncast(); |
| 0 | 2249 |
| 65 | 2250 if (call_analyzer->is_arg_returned(i - TypeFunc::Parms)) { |
|
307
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|
2251 ret_arg = true; |
|
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2252 PointsToNode *arg_esp = ptnode_adr(arg->_idx); |
| 65 | 2253 if (arg_esp->node_type() == PointsToNode::UnknownType) |
| 2254 done = false; | |
| 2255 else if (arg_esp->node_type() == PointsToNode::JavaObject) | |
|
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2256 add_pointsto_edge(resproj_idx, arg->_idx); |
| 0 | 2257 else |
|
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2258 add_deferred_edge(resproj_idx, arg->_idx); |
| 0 | 2259 } |
| 2260 } | |
| 2261 } | |
|
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2262 if (done && !ret_arg) { |
|
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|
2263 // Returns unknown object. |
|
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|
2264 set_escape_state(call_idx, PointsToNode::GlobalEscape); |
|
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|
2265 add_pointsto_edge(resproj_idx, _phantom_object); |
|
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|
2266 } |
|
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|
2267 if (done) { |
|
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|
2268 copy_dependencies = true; |
|
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|
2269 } |
| 0 | 2270 } else { |
|
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|
2271 set_escape_state(call_idx, PointsToNode::GlobalEscape); |
|
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2272 add_pointsto_edge(resproj_idx, _phantom_object); |
| 0 | 2273 } |
| 65 | 2274 if (copy_dependencies) |
|
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2275 call_analyzer->copy_dependencies(_compile->dependencies()); |
| 0 | 2276 } |
| 65 | 2277 if (done) |
|
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|
2278 _processed.set(resproj_idx); |
| 0 | 2279 break; |
| 2280 } | |
| 2281 | |
| 2282 default: | |
| 2283 // Some other type of call, assume the worst case that the | |
| 2284 // returned value, if any, globally escapes. | |
| 2285 { | |
| 2286 const TypeTuple *r = call->tf()->range(); | |
| 2287 if (r->cnt() > TypeFunc::Parms) { | |
| 2288 const Type* ret_type = r->field_at(TypeFunc::Parms); | |
| 2289 | |
| 2290 // Note: we use isa_ptr() instead of isa_oopptr() here because the | |
| 2291 // _multianewarray functions return a TypeRawPtr. | |
| 2292 if (ret_type->isa_ptr() != NULL) { | |
|
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|
2293 set_escape_state(call_idx, PointsToNode::GlobalEscape); |
|
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|
2294 add_pointsto_edge(resproj_idx, _phantom_object); |
| 0 | 2295 } |
| 2296 } | |
|
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|
2297 _processed.set(resproj_idx); |
| 0 | 2298 } |
| 2299 } | |
| 2300 } | |
| 2301 | |
| 65 | 2302 // Populate Connection Graph with Ideal nodes and create simple |
| 2303 // connection graph edges (do not need to check the node_type of inputs | |
| 2304 // or to call PointsTo() to walk the connection graph). | |
| 2305 void ConnectionGraph::record_for_escape_analysis(Node *n, PhaseTransform *phase) { | |
| 2306 if (_processed.test(n->_idx)) | |
| 2307 return; // No need to redefine node's state. | |
| 2308 | |
| 2309 if (n->is_Call()) { | |
| 2310 // Arguments to allocation and locking don't escape. | |
| 2311 if (n->is_Allocate()) { | |
| 2312 add_node(n, PointsToNode::JavaObject, PointsToNode::UnknownEscape, true); | |
| 2313 record_for_optimizer(n); | |
| 2314 } else if (n->is_Lock() || n->is_Unlock()) { | |
| 2315 // Put Lock and Unlock nodes on IGVN worklist to process them during | |
| 2316 // the first IGVN optimization when escape information is still available. | |
| 2317 record_for_optimizer(n); | |
| 2318 _processed.set(n->_idx); | |
| 2319 } else { | |
|
1100
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|
2320 // Don't mark as processed since call's arguments have to be processed. |
| 65 | 2321 PointsToNode::NodeType nt = PointsToNode::UnknownType; |
|
1100
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|
2322 PointsToNode::EscapeState es = PointsToNode::UnknownEscape; |
| 65 | 2323 |
| 2324 // Check if a call returns an object. | |
| 2325 const TypeTuple *r = n->as_Call()->tf()->range(); | |
|
1100
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|
2326 if (r->cnt() > TypeFunc::Parms && |
|
f96a1a986f7b
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|
2327 r->field_at(TypeFunc::Parms)->isa_ptr() && |
| 65 | 2328 n->as_Call()->proj_out(TypeFunc::Parms) != NULL) { |
|
1100
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|
2329 nt = PointsToNode::JavaObject; |
|
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
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|
2330 if (!n->is_CallStaticJava()) { |
|
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
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diff
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|
2331 // Since the called mathod is statically unknown assume |
|
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
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diff
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|
2332 // the worst case that the returned value globally escapes. |
|
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6895383: JCK test throws NPE for method compiled with Escape Analysis
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diff
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|
2333 es = PointsToNode::GlobalEscape; |
| 65 | 2334 } |
| 2335 } | |
|
1100
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diff
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|
2336 add_node(n, nt, es, false); |
| 65 | 2337 } |
| 2338 return; | |
| 2339 } | |
| 2340 | |
| 2341 // Using isa_ptr() instead of isa_oopptr() for LoadP and Phi because | |
| 2342 // ThreadLocal has RawPrt type. | |
| 2343 switch (n->Opcode()) { | |
| 2344 case Op_AddP: | |
| 2345 { | |
| 2346 add_node(n, PointsToNode::Field, PointsToNode::UnknownEscape, false); | |
| 2347 break; | |
| 2348 } | |
| 2349 case Op_CastX2P: | |
| 2350 { // "Unsafe" memory access. | |
| 2351 add_node(n, PointsToNode::JavaObject, PointsToNode::GlobalEscape, true); | |
| 2352 break; | |
| 2353 } | |
| 2354 case Op_CastPP: | |
| 2355 case Op_CheckCastPP: | |
|
124
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|
2356 case Op_EncodeP: |
|
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|
2357 case Op_DecodeN: |
| 65 | 2358 { |
| 2359 add_node(n, PointsToNode::LocalVar, PointsToNode::UnknownEscape, false); | |
| 2360 int ti = n->in(1)->_idx; | |
|
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|
2361 PointsToNode::NodeType nt = ptnode_adr(ti)->node_type(); |
| 65 | 2362 if (nt == PointsToNode::UnknownType) { |
| 2363 _delayed_worklist.push(n); // Process it later. | |
| 2364 break; | |
| 2365 } else if (nt == PointsToNode::JavaObject) { | |
| 2366 add_pointsto_edge(n->_idx, ti); | |
| 2367 } else { | |
| 2368 add_deferred_edge(n->_idx, ti); | |
| 2369 } | |
| 2370 _processed.set(n->_idx); | |
| 2371 break; | |
| 2372 } | |
| 2373 case Op_ConP: | |
| 2374 { | |
| 2375 // assume all pointer constants globally escape except for null | |
| 2376 PointsToNode::EscapeState es; | |
| 2377 if (phase->type(n) == TypePtr::NULL_PTR) | |
| 2378 es = PointsToNode::NoEscape; | |
| 2379 else | |
| 2380 es = PointsToNode::GlobalEscape; | |
| 0 | 2381 |
| 65 | 2382 add_node(n, PointsToNode::JavaObject, es, true); |
| 2383 break; | |
| 2384 } | |
|
113
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|
2385 case Op_ConN: |
|
ba764ed4b6f2
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|
2386 { |
|
ba764ed4b6f2
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|
2387 // assume all narrow oop constants globally escape except for null |
|
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|
2388 PointsToNode::EscapeState es; |
|
ba764ed4b6f2
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|
2389 if (phase->type(n) == TypeNarrowOop::NULL_PTR) |
|
ba764ed4b6f2
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|
2390 es = PointsToNode::NoEscape; |
|
ba764ed4b6f2
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|
2391 else |
|
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|
2392 es = PointsToNode::GlobalEscape; |
|
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|
2393 |
|
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|
2394 add_node(n, PointsToNode::JavaObject, es, true); |
|
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|
2395 break; |
|
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102
diff
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|
2396 } |
|
124
b130b98db9cf
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113
diff
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|
2397 case Op_CreateEx: |
|
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diff
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|
2398 { |
|
b130b98db9cf
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113
diff
changeset
|
2399 // assume that all exception objects globally escape |
|
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|
2400 add_node(n, PointsToNode::JavaObject, PointsToNode::GlobalEscape, true); |
|
b130b98db9cf
6689060: Escape Analysis does not work with Compressed Oops
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|
2401 break; |
|
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113
diff
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|
2402 } |
| 65 | 2403 case Op_LoadKlass: |
|
164
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diff
changeset
|
2404 case Op_LoadNKlass: |
| 65 | 2405 { |
| 2406 add_node(n, PointsToNode::JavaObject, PointsToNode::GlobalEscape, true); | |
| 2407 break; | |
| 2408 } | |
| 2409 case Op_LoadP: | |
|
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|
2410 case Op_LoadN: |
| 65 | 2411 { |
| 2412 const Type *t = phase->type(n); | |
|
253
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|
2413 if (t->make_ptr() == NULL) { |
| 65 | 2414 _processed.set(n->_idx); |
| 2415 return; | |
| 2416 } | |
| 2417 add_node(n, PointsToNode::LocalVar, PointsToNode::UnknownEscape, false); | |
| 2418 break; | |
| 2419 } | |
| 2420 case Op_Parm: | |
| 2421 { | |
| 2422 _processed.set(n->_idx); // No need to redefine it state. | |
| 2423 uint con = n->as_Proj()->_con; | |
| 2424 if (con < TypeFunc::Parms) | |
| 2425 return; | |
| 2426 const Type *t = n->in(0)->as_Start()->_domain->field_at(con); | |
| 2427 if (t->isa_ptr() == NULL) | |
| 2428 return; | |
| 2429 // We have to assume all input parameters globally escape | |
| 2430 // (Note: passing 'false' since _processed is already set). | |
| 2431 add_node(n, PointsToNode::JavaObject, PointsToNode::GlobalEscape, false); | |
| 2432 break; | |
| 2433 } | |
| 2434 case Op_Phi: | |
| 2435 { | |
|
253
b0fe4deeb9fb
6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
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diff
changeset
|
2436 const Type *t = n->as_Phi()->type(); |
|
b0fe4deeb9fb
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|
2437 if (t->make_ptr() == NULL) { |
|
b0fe4deeb9fb
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|
2438 // nothing to do if not an oop or narrow oop |
| 65 | 2439 _processed.set(n->_idx); |
| 2440 return; | |
| 2441 } | |
| 2442 add_node(n, PointsToNode::LocalVar, PointsToNode::UnknownEscape, false); | |
| 2443 uint i; | |
| 2444 for (i = 1; i < n->req() ; i++) { | |
| 2445 Node* in = n->in(i); | |
| 2446 if (in == NULL) | |
| 2447 continue; // ignore NULL | |
| 2448 in = in->uncast(); | |
| 2449 if (in->is_top() || in == n) | |
| 2450 continue; // ignore top or inputs which go back this node | |
| 2451 int ti = in->_idx; | |
|
244
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|
2452 PointsToNode::NodeType nt = ptnode_adr(ti)->node_type(); |
| 65 | 2453 if (nt == PointsToNode::UnknownType) { |
| 2454 break; | |
| 2455 } else if (nt == PointsToNode::JavaObject) { | |
| 2456 add_pointsto_edge(n->_idx, ti); | |
| 2457 } else { | |
| 2458 add_deferred_edge(n->_idx, ti); | |
| 2459 } | |
| 2460 } | |
| 2461 if (i >= n->req()) | |
| 2462 _processed.set(n->_idx); | |
| 2463 else | |
| 2464 _delayed_worklist.push(n); | |
| 2465 break; | |
| 2466 } | |
| 2467 case Op_Proj: | |
| 2468 { | |
|
1100
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kvn
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changeset
|
2469 // we are only interested in the oop result projection from a call |
| 65 | 2470 if (n->as_Proj()->_con == TypeFunc::Parms && n->in(0)->is_Call() ) { |
|
1100
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changeset
|
2471 const TypeTuple *r = n->in(0)->as_Call()->tf()->range(); |
|
f96a1a986f7b
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|
2472 assert(r->cnt() > TypeFunc::Parms, "sanity"); |
|
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
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diff
changeset
|
2473 if (r->field_at(TypeFunc::Parms)->isa_ptr() != NULL) { |
|
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
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diff
changeset
|
2474 add_node(n, PointsToNode::LocalVar, PointsToNode::UnknownEscape, false); |
|
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
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diff
changeset
|
2475 int ti = n->in(0)->_idx; |
|
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
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diff
changeset
|
2476 // The call may not be registered yet (since not all its inputs are registered) |
|
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
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diff
changeset
|
2477 // if this is the projection from backbranch edge of Phi. |
|
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
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diff
changeset
|
2478 if (ptnode_adr(ti)->node_type() != PointsToNode::UnknownType) { |
|
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
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diff
changeset
|
2479 process_call_result(n->as_Proj(), phase); |
|
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|
2480 } |
|
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|
2481 if (!_processed.test(n->_idx)) { |
|
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|
2482 // The call's result may need to be processed later if the call |
|
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|
2483 // returns it's argument and the argument is not processed yet. |
|
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|
2484 _delayed_worklist.push(n); |
|
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|
2485 } |
|
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|
2486 break; |
| 65 | 2487 } |
| 2488 } | |
|
1100
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diff
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|
2489 _processed.set(n->_idx); |
| 65 | 2490 break; |
| 2491 } | |
| 2492 case Op_Return: | |
| 2493 { | |
| 2494 if( n->req() > TypeFunc::Parms && | |
| 2495 phase->type(n->in(TypeFunc::Parms))->isa_oopptr() ) { | |
| 2496 // Treat Return value as LocalVar with GlobalEscape escape state. | |
| 2497 add_node(n, PointsToNode::LocalVar, PointsToNode::GlobalEscape, false); | |
| 2498 int ti = n->in(TypeFunc::Parms)->_idx; | |
|
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2499 PointsToNode::NodeType nt = ptnode_adr(ti)->node_type(); |
| 65 | 2500 if (nt == PointsToNode::UnknownType) { |
| 2501 _delayed_worklist.push(n); // Process it later. | |
| 2502 break; | |
| 2503 } else if (nt == PointsToNode::JavaObject) { | |
| 2504 add_pointsto_edge(n->_idx, ti); | |
| 2505 } else { | |
| 2506 add_deferred_edge(n->_idx, ti); | |
| 2507 } | |
| 2508 } | |
| 2509 _processed.set(n->_idx); | |
| 2510 break; | |
| 2511 } | |
| 2512 case Op_StoreP: | |
|
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|
2513 case Op_StoreN: |
| 65 | 2514 { |
| 2515 const Type *adr_type = phase->type(n->in(MemNode::Address)); | |
|
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|
2516 adr_type = adr_type->make_ptr(); |
| 65 | 2517 if (adr_type->isa_oopptr()) { |
| 2518 add_node(n, PointsToNode::UnknownType, PointsToNode::UnknownEscape, false); | |
| 2519 } else { | |
| 2520 Node* adr = n->in(MemNode::Address); | |
| 2521 if (adr->is_AddP() && phase->type(adr) == TypeRawPtr::NOTNULL && | |
| 2522 adr->in(AddPNode::Address)->is_Proj() && | |
| 2523 adr->in(AddPNode::Address)->in(0)->is_Allocate()) { | |
| 2524 add_node(n, PointsToNode::UnknownType, PointsToNode::UnknownEscape, false); | |
| 2525 // We are computing a raw address for a store captured | |
| 2526 // by an Initialize compute an appropriate address type. | |
| 2527 int offs = (int)phase->find_intptr_t_con(adr->in(AddPNode::Offset), Type::OffsetBot); | |
| 2528 assert(offs != Type::OffsetBot, "offset must be a constant"); | |
| 2529 } else { | |
| 2530 _processed.set(n->_idx); | |
| 2531 return; | |
| 2532 } | |
| 2533 } | |
| 2534 break; | |
| 2535 } | |
| 2536 case Op_StorePConditional: | |
| 2537 case Op_CompareAndSwapP: | |
|
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|
2538 case Op_CompareAndSwapN: |
| 65 | 2539 { |
| 2540 const Type *adr_type = phase->type(n->in(MemNode::Address)); | |
|
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|
2541 adr_type = adr_type->make_ptr(); |
| 65 | 2542 if (adr_type->isa_oopptr()) { |
| 2543 add_node(n, PointsToNode::UnknownType, PointsToNode::UnknownEscape, false); | |
| 2544 } else { | |
| 2545 _processed.set(n->_idx); | |
| 2546 return; | |
| 2547 } | |
| 2548 break; | |
| 2549 } | |
|
1100
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|
2550 case Op_AryEq: |
|
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|
2551 case Op_StrComp: |
|
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diff
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|
2552 case Op_StrEquals: |
|
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diff
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|
2553 case Op_StrIndexOf: |
|
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diff
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|
2554 { |
|
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|
2555 // char[] arrays passed to string intrinsics are not scalar replaceable. |
|
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|
2556 add_node(n, PointsToNode::UnknownType, PointsToNode::UnknownEscape, false); |
|
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|
2557 break; |
|
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|
2558 } |
| 65 | 2559 case Op_ThreadLocal: |
| 2560 { | |
| 2561 add_node(n, PointsToNode::JavaObject, PointsToNode::ArgEscape, true); | |
| 2562 break; | |
| 2563 } | |
| 2564 default: | |
| 2565 ; | |
| 2566 // nothing to do | |
| 2567 } | |
| 2568 return; | |
| 2569 } | |
| 2570 | |
| 2571 void ConnectionGraph::build_connection_graph(Node *n, PhaseTransform *phase) { | |
|
244
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|
2572 uint n_idx = n->_idx; |
|
1100
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|
2573 assert(ptnode_adr(n_idx)->_node != NULL, "node should be registered"); |
|
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|
2574 |
| 65 | 2575 // Don't set processed bit for AddP, LoadP, StoreP since |
| 2576 // they may need more then one pass to process. | |
| 1921 | 2577 // Also don't mark as processed Call nodes since their |
| 2578 // arguments may need more then one pass to process. | |
|
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|
2579 if (_processed.test(n_idx)) |
| 65 | 2580 return; // No need to redefine node's state. |
| 2581 | |
| 0 | 2582 if (n->is_Call()) { |
| 2583 CallNode *call = n->as_Call(); | |
| 2584 process_call_arguments(call, phase); | |
| 2585 return; | |
| 2586 } | |
| 2587 | |
| 65 | 2588 switch (n->Opcode()) { |
| 0 | 2589 case Op_AddP: |
| 2590 { | |
| 65 | 2591 Node *base = get_addp_base(n); |
| 2592 // Create a field edge to this node from everything base could point to. | |
| 2249 | 2593 for( VectorSetI i(PointsTo(base)); i.test(); ++i ) { |
| 0 | 2594 uint pt = i.elem; |
|
244
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|
2595 add_field_edge(pt, n_idx, address_offset(n, phase)); |
| 65 | 2596 } |
| 2597 break; | |
| 2598 } | |
| 2599 case Op_CastX2P: | |
| 2600 { | |
| 2601 assert(false, "Op_CastX2P"); | |
| 2602 break; | |
| 2603 } | |
| 2604 case Op_CastPP: | |
| 2605 case Op_CheckCastPP: | |
|
113
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|
2606 case Op_EncodeP: |
|
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|
2607 case Op_DecodeN: |
| 65 | 2608 { |
| 2609 int ti = n->in(1)->_idx; | |
|
1100
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6895383: JCK test throws NPE for method compiled with Escape Analysis
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|
2610 assert(ptnode_adr(ti)->node_type() != PointsToNode::UnknownType, "all nodes should be registered"); |
|
244
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|
2611 if (ptnode_adr(ti)->node_type() == PointsToNode::JavaObject) { |
|
524eca34ea76
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|
2612 add_pointsto_edge(n_idx, ti); |
| 65 | 2613 } else { |
|
244
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|
2614 add_deferred_edge(n_idx, ti); |
| 65 | 2615 } |
|
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|
2616 _processed.set(n_idx); |
| 65 | 2617 break; |
| 2618 } | |
| 2619 case Op_ConP: | |
| 2620 { | |
| 2621 assert(false, "Op_ConP"); | |
| 2622 break; | |
| 2623 } | |
| 163 | 2624 case Op_ConN: |
| 2625 { | |
| 2626 assert(false, "Op_ConN"); | |
| 2627 break; | |
| 2628 } | |
| 65 | 2629 case Op_CreateEx: |
| 2630 { | |
| 2631 assert(false, "Op_CreateEx"); | |
| 2632 break; | |
| 2633 } | |
| 2634 case Op_LoadKlass: | |
|
164
c436414a719e
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163
diff
changeset
|
2635 case Op_LoadNKlass: |
| 65 | 2636 { |
| 2637 assert(false, "Op_LoadKlass"); | |
| 2638 break; | |
| 2639 } | |
| 2640 case Op_LoadP: | |
|
124
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|
2641 case Op_LoadN: |
| 65 | 2642 { |
| 2643 const Type *t = phase->type(n); | |
| 2644 #ifdef ASSERT | |
|
253
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6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
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247
diff
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|
2645 if (t->make_ptr() == NULL) |
| 65 | 2646 assert(false, "Op_LoadP"); |
| 2647 #endif | |
| 2648 | |
| 2649 Node* adr = n->in(MemNode::Address)->uncast(); | |
| 2650 Node* adr_base; | |
| 2651 if (adr->is_AddP()) { | |
| 2652 adr_base = get_addp_base(adr); | |
| 2653 } else { | |
| 2654 adr_base = adr; | |
| 2655 } | |
| 2656 | |
| 2657 // For everything "adr_base" could point to, create a deferred edge from | |
| 2658 // this node to each field with the same offset. | |
| 2659 int offset = address_offset(adr, phase); | |
| 2249 | 2660 for( VectorSetI i(PointsTo(adr_base)); i.test(); ++i ) { |
| 65 | 2661 uint pt = i.elem; |
|
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|
2662 add_deferred_edge_to_fields(n_idx, pt, offset); |
| 0 | 2663 } |
| 2664 break; | |
| 2665 } | |
| 2666 case Op_Parm: | |
| 2667 { | |
| 65 | 2668 assert(false, "Op_Parm"); |
| 0 | 2669 break; |
| 2670 } | |
| 2671 case Op_Phi: | |
| 2672 { | |
| 65 | 2673 #ifdef ASSERT |
|
253
b0fe4deeb9fb
6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
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247
diff
changeset
|
2674 const Type *t = n->as_Phi()->type(); |
|
b0fe4deeb9fb
6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
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diff
changeset
|
2675 if (t->make_ptr() == NULL) |
| 65 | 2676 assert(false, "Op_Phi"); |
| 2677 #endif | |
| 2678 for (uint i = 1; i < n->req() ; i++) { | |
| 2679 Node* in = n->in(i); | |
| 2680 if (in == NULL) | |
| 2681 continue; // ignore NULL | |
| 2682 in = in->uncast(); | |
| 2683 if (in->is_top() || in == n) | |
| 2684 continue; // ignore top or inputs which go back this node | |
| 2685 int ti = in->_idx; | |
|
307
892493c3d862
6732732: CTW with EA: assert(n != 0L,"Bad immediate dominator info.")
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306
diff
changeset
|
2686 PointsToNode::NodeType nt = ptnode_adr(ti)->node_type(); |
|
892493c3d862
6732732: CTW with EA: assert(n != 0L,"Bad immediate dominator info.")
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diff
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|
2687 assert(nt != PointsToNode::UnknownType, "all nodes should be known"); |
|
892493c3d862
6732732: CTW with EA: assert(n != 0L,"Bad immediate dominator info.")
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diff
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|
2688 if (nt == PointsToNode::JavaObject) { |
|
244
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|
2689 add_pointsto_edge(n_idx, ti); |
| 65 | 2690 } else { |
|
244
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|
2691 add_deferred_edge(n_idx, ti); |
| 65 | 2692 } |
| 2693 } | |
|
244
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|
2694 _processed.set(n_idx); |
| 0 | 2695 break; |
| 2696 } | |
| 65 | 2697 case Op_Proj: |
| 0 | 2698 { |
|
1100
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6895383: JCK test throws NPE for method compiled with Escape Analysis
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diff
changeset
|
2699 // we are only interested in the oop result projection from a call |
| 65 | 2700 if (n->as_Proj()->_con == TypeFunc::Parms && n->in(0)->is_Call() ) { |
|
1100
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
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diff
changeset
|
2701 assert(ptnode_adr(n->in(0)->_idx)->node_type() != PointsToNode::UnknownType, |
|
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
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diff
changeset
|
2702 "all nodes should be registered"); |
|
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
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diff
changeset
|
2703 const TypeTuple *r = n->in(0)->as_Call()->tf()->range(); |
|
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
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diff
changeset
|
2704 assert(r->cnt() > TypeFunc::Parms, "sanity"); |
|
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
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diff
changeset
|
2705 if (r->field_at(TypeFunc::Parms)->isa_ptr() != NULL) { |
|
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
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|
2706 process_call_result(n->as_Proj(), phase); |
|
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
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diff
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|
2707 assert(_processed.test(n_idx), "all call results should be processed"); |
|
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
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diff
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|
2708 break; |
|
f96a1a986f7b
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diff
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|
2709 } |
| 65 | 2710 } |
|
1100
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|
2711 assert(false, "Op_Proj"); |
| 0 | 2712 break; |
| 2713 } | |
| 65 | 2714 case Op_Return: |
| 0 | 2715 { |
| 65 | 2716 #ifdef ASSERT |
| 2717 if( n->req() <= TypeFunc::Parms || | |
| 2718 !phase->type(n->in(TypeFunc::Parms))->isa_oopptr() ) { | |
| 2719 assert(false, "Op_Return"); | |
| 0 | 2720 } |
| 65 | 2721 #endif |
| 2722 int ti = n->in(TypeFunc::Parms)->_idx; | |
|
1100
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|
2723 assert(ptnode_adr(ti)->node_type() != PointsToNode::UnknownType, "node should be registered"); |
|
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|
2724 if (ptnode_adr(ti)->node_type() == PointsToNode::JavaObject) { |
|
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|
2725 add_pointsto_edge(n_idx, ti); |
| 65 | 2726 } else { |
|
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|
2727 add_deferred_edge(n_idx, ti); |
| 65 | 2728 } |
|
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|
2729 _processed.set(n_idx); |
| 0 | 2730 break; |
| 2731 } | |
| 2732 case Op_StoreP: | |
|
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|
2733 case Op_StoreN: |
| 0 | 2734 case Op_StorePConditional: |
| 2735 case Op_CompareAndSwapP: | |
|
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|
2736 case Op_CompareAndSwapN: |
| 0 | 2737 { |
| 2738 Node *adr = n->in(MemNode::Address); | |
|
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|
2739 const Type *adr_type = phase->type(adr)->make_ptr(); |
| 65 | 2740 #ifdef ASSERT |
| 0 | 2741 if (!adr_type->isa_oopptr()) |
| 65 | 2742 assert(phase->type(adr) == TypeRawPtr::NOTNULL, "Op_StoreP"); |
| 2743 #endif | |
| 0 | 2744 |
| 65 | 2745 assert(adr->is_AddP(), "expecting an AddP"); |
| 2746 Node *adr_base = get_addp_base(adr); | |
| 2747 Node *val = n->in(MemNode::ValueIn)->uncast(); | |
| 2748 // For everything "adr_base" could point to, create a deferred edge | |
| 2749 // to "val" from each field with the same offset. | |
| 2249 | 2750 for( VectorSetI i(PointsTo(adr_base)); i.test(); ++i ) { |
| 0 | 2751 uint pt = i.elem; |
| 65 | 2752 add_edge_from_fields(pt, val->_idx, address_offset(adr, phase)); |
| 0 | 2753 } |
| 2754 break; | |
| 2755 } | |
|
1100
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diff
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|
2756 case Op_AryEq: |
|
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
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diff
changeset
|
2757 case Op_StrComp: |
|
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
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diff
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|
2758 case Op_StrEquals: |
|
f96a1a986f7b
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diff
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|
2759 case Op_StrIndexOf: |
|
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
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diff
changeset
|
2760 { |
|
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
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changeset
|
2761 // char[] arrays passed to string intrinsic do not escape but |
|
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2762 // they are not scalar replaceable. Adjust escape state for them. |
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2763 // Start from in(2) edge since in(1) is memory edge. |
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2764 for (uint i = 2; i < n->req(); i++) { |
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2765 Node* adr = n->in(i)->uncast(); |
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2766 const Type *at = phase->type(adr); |
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2767 if (!adr->is_top() && at->isa_ptr()) { |
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2768 assert(at == Type::TOP || at == TypePtr::NULL_PTR || |
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2769 at->isa_ptr() != NULL, "expecting an Ptr"); |
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2770 if (adr->is_AddP()) { |
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2771 adr = get_addp_base(adr); |
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2772 } |
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2773 // Mark as ArgEscape everything "adr" could point to. |
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2774 set_escape_state(adr->_idx, PointsToNode::ArgEscape); |
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2775 } |
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2776 } |
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2777 _processed.set(n_idx); |
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2778 break; |
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2779 } |
| 65 | 2780 case Op_ThreadLocal: |
| 0 | 2781 { |
| 65 | 2782 assert(false, "Op_ThreadLocal"); |
| 0 | 2783 break; |
| 2784 } | |
| 2785 default: | |
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2786 // This method should be called only for EA specific nodes. |
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2787 ShouldNotReachHere(); |
| 0 | 2788 } |
| 2789 } | |
| 2790 | |
| 2791 #ifndef PRODUCT | |
| 2792 void ConnectionGraph::dump() { | |
| 2793 bool first = true; | |
| 2794 | |
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2795 uint size = nodes_size(); |
| 65 | 2796 for (uint ni = 0; ni < size; ni++) { |
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2797 PointsToNode *ptn = ptnode_adr(ni); |
| 65 | 2798 PointsToNode::NodeType ptn_type = ptn->node_type(); |
| 2799 | |
| 2800 if (ptn_type != PointsToNode::JavaObject || ptn->_node == NULL) | |
| 0 | 2801 continue; |
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2802 PointsToNode::EscapeState es = escape_state(ptn->_node); |
| 65 | 2803 if (ptn->_node->is_Allocate() && (es == PointsToNode::NoEscape || Verbose)) { |
| 2804 if (first) { | |
| 2805 tty->cr(); | |
| 2806 tty->print("======== Connection graph for "); | |
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2807 _compile->method()->print_short_name(); |
| 65 | 2808 tty->cr(); |
| 2809 first = false; | |
| 2810 } | |
| 2811 tty->print("%6d ", ni); | |
| 2812 ptn->dump(); | |
| 2813 // Print all locals which reference this allocation | |
| 2814 for (uint li = ni; li < size; li++) { | |
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2815 PointsToNode *ptn_loc = ptnode_adr(li); |
| 65 | 2816 PointsToNode::NodeType ptn_loc_type = ptn_loc->node_type(); |
| 2817 if ( ptn_loc_type == PointsToNode::LocalVar && ptn_loc->_node != NULL && | |
| 2818 ptn_loc->edge_count() == 1 && ptn_loc->edge_target(0) == ni ) { | |
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2819 ptnode_adr(li)->dump(false); |
| 0 | 2820 } |
| 2821 } | |
| 65 | 2822 if (Verbose) { |
| 2823 // Print all fields which reference this allocation | |
| 2824 for (uint i = 0; i < ptn->edge_count(); i++) { | |
| 2825 uint ei = ptn->edge_target(i); | |
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2826 ptnode_adr(ei)->dump(false); |
| 65 | 2827 } |
| 2828 } | |
| 2829 tty->cr(); | |
| 0 | 2830 } |
| 2831 } | |
| 2832 } | |
| 2833 #endif |