Mercurial > hg > truffle
annotate src/share/vm/opto/matcher.cpp @ 14714:b602356a9cfc
additional canonicalizers for accesses and value nodes (improves number of implicit null checks)
author | Lukas Stadler <lukas.stadler@oracle.com> |
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date | Thu, 20 Mar 2014 17:15:36 +0100 |
parents | 9e9af3aa4278 |
children | 92aa6797d639 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "memory/allocation.inline.hpp" | |
27 #include "opto/addnode.hpp" | |
28 #include "opto/callnode.hpp" | |
29 #include "opto/connode.hpp" | |
30 #include "opto/idealGraphPrinter.hpp" | |
31 #include "opto/matcher.hpp" | |
32 #include "opto/memnode.hpp" | |
33 #include "opto/opcodes.hpp" | |
34 #include "opto/regmask.hpp" | |
35 #include "opto/rootnode.hpp" | |
36 #include "opto/runtime.hpp" | |
37 #include "opto/type.hpp" | |
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38 #include "opto/vectornode.hpp" |
1972 | 39 #include "runtime/atomic.hpp" |
40 #include "runtime/os.hpp" | |
41 #ifdef TARGET_ARCH_MODEL_x86_32 | |
42 # include "adfiles/ad_x86_32.hpp" | |
43 #endif | |
44 #ifdef TARGET_ARCH_MODEL_x86_64 | |
45 # include "adfiles/ad_x86_64.hpp" | |
46 #endif | |
47 #ifdef TARGET_ARCH_MODEL_sparc | |
48 # include "adfiles/ad_sparc.hpp" | |
49 #endif | |
50 #ifdef TARGET_ARCH_MODEL_zero | |
51 # include "adfiles/ad_zero.hpp" | |
52 #endif | |
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53 #ifdef TARGET_ARCH_MODEL_arm |
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54 # include "adfiles/ad_arm.hpp" |
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55 #endif |
14391 | 56 #ifdef TARGET_ARCH_MODEL_ppc_32 |
57 # include "adfiles/ad_ppc_32.hpp" | |
58 #endif | |
59 #ifdef TARGET_ARCH_MODEL_ppc_64 | |
60 # include "adfiles/ad_ppc_64.hpp" | |
3796 | 61 #endif |
0 | 62 |
63 OptoReg::Name OptoReg::c_frame_pointer; | |
64 | |
65 const RegMask *Matcher::idealreg2regmask[_last_machine_leaf]; | |
66 RegMask Matcher::mreg2regmask[_last_Mach_Reg]; | |
67 RegMask Matcher::STACK_ONLY_mask; | |
68 RegMask Matcher::c_frame_ptr_mask; | |
69 const uint Matcher::_begin_rematerialize = _BEGIN_REMATERIALIZE; | |
70 const uint Matcher::_end_rematerialize = _END_REMATERIALIZE; | |
71 | |
72 //---------------------------Matcher------------------------------------------- | |
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73 Matcher::Matcher() |
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74 : PhaseTransform( Phase::Ins_Select ), |
0 | 75 #ifdef ASSERT |
76 _old2new_map(C->comp_arena()), | |
222 | 77 _new2old_map(C->comp_arena()), |
0 | 78 #endif |
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79 _shared_nodes(C->comp_arena()), |
0 | 80 _reduceOp(reduceOp), _leftOp(leftOp), _rightOp(rightOp), |
81 _swallowed(swallowed), | |
82 _begin_inst_chain_rule(_BEGIN_INST_CHAIN_RULE), | |
83 _end_inst_chain_rule(_END_INST_CHAIN_RULE), | |
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84 _must_clone(must_clone), |
0 | 85 _register_save_policy(register_save_policy), |
86 _c_reg_save_policy(c_reg_save_policy), | |
87 _register_save_type(register_save_type), | |
88 _ruleName(ruleName), | |
89 _allocation_started(false), | |
90 _states_arena(Chunk::medium_size), | |
91 _visited(&_states_arena), | |
92 _shared(&_states_arena), | |
93 _dontcare(&_states_arena) { | |
94 C->set_matcher(this); | |
95 | |
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96 idealreg2spillmask [Op_RegI] = NULL; |
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97 idealreg2spillmask [Op_RegN] = NULL; |
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98 idealreg2spillmask [Op_RegL] = NULL; |
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99 idealreg2spillmask [Op_RegF] = NULL; |
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100 idealreg2spillmask [Op_RegD] = NULL; |
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101 idealreg2spillmask [Op_RegP] = NULL; |
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102 idealreg2spillmask [Op_VecS] = NULL; |
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103 idealreg2spillmask [Op_VecD] = NULL; |
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104 idealreg2spillmask [Op_VecX] = NULL; |
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105 idealreg2spillmask [Op_VecY] = NULL; |
0 | 106 |
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107 idealreg2debugmask [Op_RegI] = NULL; |
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108 idealreg2debugmask [Op_RegN] = NULL; |
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109 idealreg2debugmask [Op_RegL] = NULL; |
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110 idealreg2debugmask [Op_RegF] = NULL; |
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111 idealreg2debugmask [Op_RegD] = NULL; |
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112 idealreg2debugmask [Op_RegP] = NULL; |
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113 idealreg2debugmask [Op_VecS] = NULL; |
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114 idealreg2debugmask [Op_VecD] = NULL; |
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115 idealreg2debugmask [Op_VecX] = NULL; |
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116 idealreg2debugmask [Op_VecY] = NULL; |
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117 |
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118 idealreg2mhdebugmask[Op_RegI] = NULL; |
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119 idealreg2mhdebugmask[Op_RegN] = NULL; |
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120 idealreg2mhdebugmask[Op_RegL] = NULL; |
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121 idealreg2mhdebugmask[Op_RegF] = NULL; |
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122 idealreg2mhdebugmask[Op_RegD] = NULL; |
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123 idealreg2mhdebugmask[Op_RegP] = NULL; |
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124 idealreg2mhdebugmask[Op_VecS] = NULL; |
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125 idealreg2mhdebugmask[Op_VecD] = NULL; |
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126 idealreg2mhdebugmask[Op_VecX] = NULL; |
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127 idealreg2mhdebugmask[Op_VecY] = NULL; |
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128 |
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129 debug_only(_mem_node = NULL;) // Ideal memory node consumed by mach node |
0 | 130 } |
131 | |
132 //------------------------------warp_incoming_stk_arg------------------------ | |
133 // This warps a VMReg into an OptoReg::Name | |
134 OptoReg::Name Matcher::warp_incoming_stk_arg( VMReg reg ) { | |
135 OptoReg::Name warped; | |
136 if( reg->is_stack() ) { // Stack slot argument? | |
137 warped = OptoReg::add(_old_SP, reg->reg2stack() ); | |
138 warped = OptoReg::add(warped, C->out_preserve_stack_slots()); | |
139 if( warped >= _in_arg_limit ) | |
140 _in_arg_limit = OptoReg::add(warped, 1); // Bump max stack slot seen | |
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141 if (!RegMask::can_represent_arg(warped)) { |
0 | 142 // the compiler cannot represent this method's calling sequence |
143 C->record_method_not_compilable_all_tiers("unsupported incoming calling sequence"); | |
144 return OptoReg::Bad; | |
145 } | |
146 return warped; | |
147 } | |
148 return OptoReg::as_OptoReg(reg); | |
149 } | |
150 | |
151 //---------------------------compute_old_SP------------------------------------ | |
152 OptoReg::Name Compile::compute_old_SP() { | |
153 int fixed = fixed_slots(); | |
154 int preserve = in_preserve_stack_slots(); | |
155 return OptoReg::stack2reg(round_to(fixed + preserve, Matcher::stack_alignment_in_slots())); | |
156 } | |
157 | |
158 | |
159 | |
160 #ifdef ASSERT | |
161 void Matcher::verify_new_nodes_only(Node* xroot) { | |
162 // Make sure that the new graph only references new nodes | |
163 ResourceMark rm; | |
164 Unique_Node_List worklist; | |
165 VectorSet visited(Thread::current()->resource_area()); | |
166 worklist.push(xroot); | |
167 while (worklist.size() > 0) { | |
168 Node* n = worklist.pop(); | |
169 visited <<= n->_idx; | |
170 assert(C->node_arena()->contains(n), "dead node"); | |
171 for (uint j = 0; j < n->req(); j++) { | |
172 Node* in = n->in(j); | |
173 if (in != NULL) { | |
174 assert(C->node_arena()->contains(in), "dead node"); | |
175 if (!visited.test(in->_idx)) { | |
176 worklist.push(in); | |
177 } | |
178 } | |
179 } | |
180 } | |
181 } | |
182 #endif | |
183 | |
184 | |
185 //---------------------------match--------------------------------------------- | |
186 void Matcher::match( ) { | |
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187 if( MaxLabelRootDepth < 100 ) { // Too small? |
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188 assert(false, "invalid MaxLabelRootDepth, increase it to 100 minimum"); |
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189 MaxLabelRootDepth = 100; |
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190 } |
0 | 191 // One-time initialization of some register masks. |
192 init_spill_mask( C->root()->in(1) ); | |
193 _return_addr_mask = return_addr(); | |
194 #ifdef _LP64 | |
195 // Pointers take 2 slots in 64-bit land | |
196 _return_addr_mask.Insert(OptoReg::add(return_addr(),1)); | |
197 #endif | |
198 | |
199 // Map a Java-signature return type into return register-value | |
200 // machine registers for 0, 1 and 2 returned values. | |
201 const TypeTuple *range = C->tf()->range(); | |
202 if( range->cnt() > TypeFunc::Parms ) { // If not a void function | |
203 // Get ideal-register return type | |
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204 int ireg = range->field_at(TypeFunc::Parms)->ideal_reg(); |
0 | 205 // Get machine return register |
206 uint sop = C->start()->Opcode(); | |
207 OptoRegPair regs = return_value(ireg, false); | |
208 | |
209 // And mask for same | |
210 _return_value_mask = RegMask(regs.first()); | |
211 if( OptoReg::is_valid(regs.second()) ) | |
212 _return_value_mask.Insert(regs.second()); | |
213 } | |
214 | |
215 // --------------- | |
216 // Frame Layout | |
217 | |
218 // Need the method signature to determine the incoming argument types, | |
219 // because the types determine which registers the incoming arguments are | |
220 // in, and this affects the matched code. | |
221 const TypeTuple *domain = C->tf()->domain(); | |
222 uint argcnt = domain->cnt() - TypeFunc::Parms; | |
223 BasicType *sig_bt = NEW_RESOURCE_ARRAY( BasicType, argcnt ); | |
224 VMRegPair *vm_parm_regs = NEW_RESOURCE_ARRAY( VMRegPair, argcnt ); | |
225 _parm_regs = NEW_RESOURCE_ARRAY( OptoRegPair, argcnt ); | |
226 _calling_convention_mask = NEW_RESOURCE_ARRAY( RegMask, argcnt ); | |
227 uint i; | |
228 for( i = 0; i<argcnt; i++ ) { | |
229 sig_bt[i] = domain->field_at(i+TypeFunc::Parms)->basic_type(); | |
230 } | |
231 | |
232 // Pass array of ideal registers and length to USER code (from the AD file) | |
233 // that will convert this to an array of register numbers. | |
234 const StartNode *start = C->start(); | |
235 start->calling_convention( sig_bt, vm_parm_regs, argcnt ); | |
236 #ifdef ASSERT | |
237 // Sanity check users' calling convention. Real handy while trying to | |
238 // get the initial port correct. | |
239 { for (uint i = 0; i<argcnt; i++) { | |
240 if( !vm_parm_regs[i].first()->is_valid() && !vm_parm_regs[i].second()->is_valid() ) { | |
241 assert(domain->field_at(i+TypeFunc::Parms)==Type::HALF, "only allowed on halve" ); | |
242 _parm_regs[i].set_bad(); | |
243 continue; | |
244 } | |
245 VMReg parm_reg = vm_parm_regs[i].first(); | |
246 assert(parm_reg->is_valid(), "invalid arg?"); | |
247 if (parm_reg->is_reg()) { | |
248 OptoReg::Name opto_parm_reg = OptoReg::as_OptoReg(parm_reg); | |
249 assert(can_be_java_arg(opto_parm_reg) || | |
250 C->stub_function() == CAST_FROM_FN_PTR(address, OptoRuntime::rethrow_C) || | |
251 opto_parm_reg == inline_cache_reg(), | |
252 "parameters in register must be preserved by runtime stubs"); | |
253 } | |
254 for (uint j = 0; j < i; j++) { | |
255 assert(parm_reg != vm_parm_regs[j].first(), | |
256 "calling conv. must produce distinct regs"); | |
257 } | |
258 } | |
259 } | |
260 #endif | |
261 | |
262 // Do some initial frame layout. | |
263 | |
264 // Compute the old incoming SP (may be called FP) as | |
265 // OptoReg::stack0() + locks + in_preserve_stack_slots + pad2. | |
266 _old_SP = C->compute_old_SP(); | |
267 assert( is_even(_old_SP), "must be even" ); | |
268 | |
269 // Compute highest incoming stack argument as | |
270 // _old_SP + out_preserve_stack_slots + incoming argument size. | |
271 _in_arg_limit = OptoReg::add(_old_SP, C->out_preserve_stack_slots()); | |
272 assert( is_even(_in_arg_limit), "out_preserve must be even" ); | |
273 for( i = 0; i < argcnt; i++ ) { | |
274 // Permit args to have no register | |
275 _calling_convention_mask[i].Clear(); | |
276 if( !vm_parm_regs[i].first()->is_valid() && !vm_parm_regs[i].second()->is_valid() ) { | |
277 continue; | |
278 } | |
279 // calling_convention returns stack arguments as a count of | |
280 // slots beyond OptoReg::stack0()/VMRegImpl::stack0. We need to convert this to | |
281 // the allocators point of view, taking into account all the | |
282 // preserve area, locks & pad2. | |
283 | |
284 OptoReg::Name reg1 = warp_incoming_stk_arg(vm_parm_regs[i].first()); | |
285 if( OptoReg::is_valid(reg1)) | |
286 _calling_convention_mask[i].Insert(reg1); | |
287 | |
288 OptoReg::Name reg2 = warp_incoming_stk_arg(vm_parm_regs[i].second()); | |
289 if( OptoReg::is_valid(reg2)) | |
290 _calling_convention_mask[i].Insert(reg2); | |
291 | |
292 // Saved biased stack-slot register number | |
293 _parm_regs[i].set_pair(reg2, reg1); | |
294 } | |
295 | |
296 // Finally, make sure the incoming arguments take up an even number of | |
297 // words, in case the arguments or locals need to contain doubleword stack | |
298 // slots. The rest of the system assumes that stack slot pairs (in | |
299 // particular, in the spill area) which look aligned will in fact be | |
300 // aligned relative to the stack pointer in the target machine. Double | |
301 // stack slots will always be allocated aligned. | |
302 _new_SP = OptoReg::Name(round_to(_in_arg_limit, RegMask::SlotsPerLong)); | |
303 | |
304 // Compute highest outgoing stack argument as | |
305 // _new_SP + out_preserve_stack_slots + max(outgoing argument size). | |
306 _out_arg_limit = OptoReg::add(_new_SP, C->out_preserve_stack_slots()); | |
307 assert( is_even(_out_arg_limit), "out_preserve must be even" ); | |
308 | |
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309 if (!RegMask::can_represent_arg(OptoReg::add(_out_arg_limit,-1))) { |
0 | 310 // the compiler cannot represent this method's calling sequence |
311 C->record_method_not_compilable("must be able to represent all call arguments in reg mask"); | |
312 } | |
313 | |
314 if (C->failing()) return; // bailed out on incoming arg failure | |
315 | |
316 // --------------- | |
317 // Collect roots of matcher trees. Every node for which | |
318 // _shared[_idx] is cleared is guaranteed to not be shared, and thus | |
319 // can be a valid interior of some tree. | |
320 find_shared( C->root() ); | |
321 find_shared( C->top() ); | |
322 | |
10405 | 323 C->print_method(PHASE_BEFORE_MATCHING); |
0 | 324 |
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325 // Create new ideal node ConP #NULL even if it does exist in old space |
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326 // to avoid false sharing if the corresponding mach node is not used. |
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327 // The corresponding mach node is only used in rare cases for derived |
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328 // pointers. |
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329 Node* new_ideal_null = ConNode::make(C, TypePtr::NULL_PTR); |
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330 |
0 | 331 // Swap out to old-space; emptying new-space |
332 Arena *old = C->node_arena()->move_contents(C->old_arena()); | |
333 | |
334 // Save debug and profile information for nodes in old space: | |
335 _old_node_note_array = C->node_note_array(); | |
336 if (_old_node_note_array != NULL) { | |
337 C->set_node_note_array(new(C->comp_arena()) GrowableArray<Node_Notes*> | |
338 (C->comp_arena(), _old_node_note_array->length(), | |
339 0, NULL)); | |
340 } | |
341 | |
342 // Pre-size the new_node table to avoid the need for range checks. | |
343 grow_new_node_array(C->unique()); | |
344 | |
345 // Reset node counter so MachNodes start with _idx at 0 | |
346 int nodes = C->unique(); // save value | |
347 C->set_unique(0); | |
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348 C->reset_dead_node_list(); |
0 | 349 |
350 // Recursively match trees from old space into new space. | |
351 // Correct leaves of new-space Nodes; they point to old-space. | |
352 _visited.Clear(); // Clear visit bits for xform call | |
353 C->set_cached_top_node(xform( C->top(), nodes )); | |
354 if (!C->failing()) { | |
355 Node* xroot = xform( C->root(), 1 ); | |
356 if (xroot == NULL) { | |
357 Matcher::soft_match_failure(); // recursive matching process failed | |
358 C->record_method_not_compilable("instruction match failed"); | |
359 } else { | |
360 // During matching shared constants were attached to C->root() | |
361 // because xroot wasn't available yet, so transfer the uses to | |
362 // the xroot. | |
363 for( DUIterator_Fast jmax, j = C->root()->fast_outs(jmax); j < jmax; j++ ) { | |
364 Node* n = C->root()->fast_out(j); | |
365 if (C->node_arena()->contains(n)) { | |
366 assert(n->in(0) == C->root(), "should be control user"); | |
367 n->set_req(0, xroot); | |
368 --j; | |
369 --jmax; | |
370 } | |
371 } | |
372 | |
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373 // Generate new mach node for ConP #NULL |
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374 assert(new_ideal_null != NULL, "sanity"); |
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375 _mach_null = match_tree(new_ideal_null); |
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376 // Don't set control, it will confuse GCM since there are no uses. |
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377 // The control will be set when this node is used first time |
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378 // in find_base_for_derived(). |
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379 assert(_mach_null != NULL, ""); |
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380 |
0 | 381 C->set_root(xroot->is_Root() ? xroot->as_Root() : NULL); |
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382 |
0 | 383 #ifdef ASSERT |
384 verify_new_nodes_only(xroot); | |
385 #endif | |
386 } | |
387 } | |
388 if (C->top() == NULL || C->root() == NULL) { | |
389 C->record_method_not_compilable("graph lost"); // %%% cannot happen? | |
390 } | |
391 if (C->failing()) { | |
392 // delete old; | |
393 old->destruct_contents(); | |
394 return; | |
395 } | |
396 assert( C->top(), "" ); | |
397 assert( C->root(), "" ); | |
398 validate_null_checks(); | |
399 | |
400 // Now smoke old-space | |
401 NOT_DEBUG( old->destruct_contents() ); | |
402 | |
403 // ------------------------ | |
404 // Set up save-on-entry registers | |
405 Fixup_Save_On_Entry( ); | |
406 } | |
407 | |
408 | |
409 //------------------------------Fixup_Save_On_Entry---------------------------- | |
410 // The stated purpose of this routine is to take care of save-on-entry | |
411 // registers. However, the overall goal of the Match phase is to convert into | |
412 // machine-specific instructions which have RegMasks to guide allocation. | |
413 // So what this procedure really does is put a valid RegMask on each input | |
414 // to the machine-specific variations of all Return, TailCall and Halt | |
415 // instructions. It also adds edgs to define the save-on-entry values (and of | |
416 // course gives them a mask). | |
417 | |
418 static RegMask *init_input_masks( uint size, RegMask &ret_adr, RegMask &fp ) { | |
419 RegMask *rms = NEW_RESOURCE_ARRAY( RegMask, size ); | |
420 // Do all the pre-defined register masks | |
421 rms[TypeFunc::Control ] = RegMask::Empty; | |
422 rms[TypeFunc::I_O ] = RegMask::Empty; | |
423 rms[TypeFunc::Memory ] = RegMask::Empty; | |
424 rms[TypeFunc::ReturnAdr] = ret_adr; | |
425 rms[TypeFunc::FramePtr ] = fp; | |
426 return rms; | |
427 } | |
428 | |
429 //---------------------------init_first_stack_mask----------------------------- | |
430 // Create the initial stack mask used by values spilling to the stack. | |
431 // Disallow any debug info in outgoing argument areas by setting the | |
432 // initial mask accordingly. | |
433 void Matcher::init_first_stack_mask() { | |
434 | |
435 // Allocate storage for spill masks as masks for the appropriate load type. | |
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436 RegMask *rms = (RegMask*)C->comp_arena()->Amalloc_D(sizeof(RegMask) * (3*6+4)); |
1137
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437 |
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438 idealreg2spillmask [Op_RegN] = &rms[0]; |
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439 idealreg2spillmask [Op_RegI] = &rms[1]; |
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440 idealreg2spillmask [Op_RegL] = &rms[2]; |
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441 idealreg2spillmask [Op_RegF] = &rms[3]; |
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442 idealreg2spillmask [Op_RegD] = &rms[4]; |
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443 idealreg2spillmask [Op_RegP] = &rms[5]; |
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444 |
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445 idealreg2debugmask [Op_RegN] = &rms[6]; |
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446 idealreg2debugmask [Op_RegI] = &rms[7]; |
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447 idealreg2debugmask [Op_RegL] = &rms[8]; |
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448 idealreg2debugmask [Op_RegF] = &rms[9]; |
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449 idealreg2debugmask [Op_RegD] = &rms[10]; |
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450 idealreg2debugmask [Op_RegP] = &rms[11]; |
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451 |
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452 idealreg2mhdebugmask[Op_RegN] = &rms[12]; |
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453 idealreg2mhdebugmask[Op_RegI] = &rms[13]; |
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454 idealreg2mhdebugmask[Op_RegL] = &rms[14]; |
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455 idealreg2mhdebugmask[Op_RegF] = &rms[15]; |
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456 idealreg2mhdebugmask[Op_RegD] = &rms[16]; |
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457 idealreg2mhdebugmask[Op_RegP] = &rms[17]; |
0 | 458 |
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459 idealreg2spillmask [Op_VecS] = &rms[18]; |
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460 idealreg2spillmask [Op_VecD] = &rms[19]; |
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461 idealreg2spillmask [Op_VecX] = &rms[20]; |
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462 idealreg2spillmask [Op_VecY] = &rms[21]; |
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463 |
0 | 464 OptoReg::Name i; |
465 | |
466 // At first, start with the empty mask | |
467 C->FIRST_STACK_mask().Clear(); | |
468 | |
469 // Add in the incoming argument area | |
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470 OptoReg::Name init_in = OptoReg::add(_old_SP, C->out_preserve_stack_slots()); |
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471 for (i = init_in; i < _in_arg_limit; i = OptoReg::add(i,1)) { |
0 | 472 C->FIRST_STACK_mask().Insert(i); |
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473 } |
0 | 474 // Add in all bits past the outgoing argument area |
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475 guarantee(RegMask::can_represent_arg(OptoReg::add(_out_arg_limit,-1)), |
0 | 476 "must be able to represent all call arguments in reg mask"); |
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477 OptoReg::Name init = _out_arg_limit; |
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478 for (i = init; RegMask::can_represent(i); i = OptoReg::add(i,1)) { |
0 | 479 C->FIRST_STACK_mask().Insert(i); |
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480 } |
0 | 481 // Finally, set the "infinite stack" bit. |
482 C->FIRST_STACK_mask().set_AllStack(); | |
483 | |
484 // Make spill masks. Registers for their class, plus FIRST_STACK_mask. | |
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485 RegMask aligned_stack_mask = C->FIRST_STACK_mask(); |
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486 // Keep spill masks aligned. |
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487 aligned_stack_mask.clear_to_pairs(); |
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488 assert(aligned_stack_mask.is_AllStack(), "should be infinite stack"); |
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489 |
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490 *idealreg2spillmask[Op_RegP] = *idealreg2regmask[Op_RegP]; |
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491 #ifdef _LP64 |
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492 *idealreg2spillmask[Op_RegN] = *idealreg2regmask[Op_RegN]; |
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493 idealreg2spillmask[Op_RegN]->OR(C->FIRST_STACK_mask()); |
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494 idealreg2spillmask[Op_RegP]->OR(aligned_stack_mask); |
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495 #else |
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496 idealreg2spillmask[Op_RegP]->OR(C->FIRST_STACK_mask()); |
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497 #endif |
0 | 498 *idealreg2spillmask[Op_RegI] = *idealreg2regmask[Op_RegI]; |
499 idealreg2spillmask[Op_RegI]->OR(C->FIRST_STACK_mask()); | |
500 *idealreg2spillmask[Op_RegL] = *idealreg2regmask[Op_RegL]; | |
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501 idealreg2spillmask[Op_RegL]->OR(aligned_stack_mask); |
0 | 502 *idealreg2spillmask[Op_RegF] = *idealreg2regmask[Op_RegF]; |
503 idealreg2spillmask[Op_RegF]->OR(C->FIRST_STACK_mask()); | |
504 *idealreg2spillmask[Op_RegD] = *idealreg2regmask[Op_RegD]; | |
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505 idealreg2spillmask[Op_RegD]->OR(aligned_stack_mask); |
0 | 506 |
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507 if (Matcher::vector_size_supported(T_BYTE,4)) { |
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508 *idealreg2spillmask[Op_VecS] = *idealreg2regmask[Op_VecS]; |
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509 idealreg2spillmask[Op_VecS]->OR(C->FIRST_STACK_mask()); |
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510 } |
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511 if (Matcher::vector_size_supported(T_FLOAT,2)) { |
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512 // For VecD we need dual alignment and 8 bytes (2 slots) for spills. |
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513 // RA guarantees such alignment since it is needed for Double and Long values. |
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514 *idealreg2spillmask[Op_VecD] = *idealreg2regmask[Op_VecD]; |
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515 idealreg2spillmask[Op_VecD]->OR(aligned_stack_mask); |
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516 } |
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517 if (Matcher::vector_size_supported(T_FLOAT,4)) { |
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518 // For VecX we need quadro alignment and 16 bytes (4 slots) for spills. |
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519 // |
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520 // RA can use input arguments stack slots for spills but until RA |
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521 // we don't know frame size and offset of input arg stack slots. |
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522 // |
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523 // Exclude last input arg stack slots to avoid spilling vectors there |
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524 // otherwise vector spills could stomp over stack slots in caller frame. |
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525 OptoReg::Name in = OptoReg::add(_in_arg_limit, -1); |
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526 for (int k = 1; (in >= init_in) && (k < RegMask::SlotsPerVecX); k++) { |
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527 aligned_stack_mask.Remove(in); |
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528 in = OptoReg::add(in, -1); |
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529 } |
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530 aligned_stack_mask.clear_to_sets(RegMask::SlotsPerVecX); |
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531 assert(aligned_stack_mask.is_AllStack(), "should be infinite stack"); |
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532 *idealreg2spillmask[Op_VecX] = *idealreg2regmask[Op_VecX]; |
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533 idealreg2spillmask[Op_VecX]->OR(aligned_stack_mask); |
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534 } |
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535 if (Matcher::vector_size_supported(T_FLOAT,8)) { |
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536 // For VecY we need octo alignment and 32 bytes (8 slots) for spills. |
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537 OptoReg::Name in = OptoReg::add(_in_arg_limit, -1); |
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538 for (int k = 1; (in >= init_in) && (k < RegMask::SlotsPerVecY); k++) { |
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539 aligned_stack_mask.Remove(in); |
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540 in = OptoReg::add(in, -1); |
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541 } |
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542 aligned_stack_mask.clear_to_sets(RegMask::SlotsPerVecY); |
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543 assert(aligned_stack_mask.is_AllStack(), "should be infinite stack"); |
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544 *idealreg2spillmask[Op_VecY] = *idealreg2regmask[Op_VecY]; |
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545 idealreg2spillmask[Op_VecY]->OR(aligned_stack_mask); |
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546 } |
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547 if (UseFPUForSpilling) { |
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548 // This mask logic assumes that the spill operations are |
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549 // symmetric and that the registers involved are the same size. |
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550 // On sparc for instance we may have to use 64 bit moves will |
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551 // kill 2 registers when used with F0-F31. |
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552 idealreg2spillmask[Op_RegI]->OR(*idealreg2regmask[Op_RegF]); |
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553 idealreg2spillmask[Op_RegF]->OR(*idealreg2regmask[Op_RegI]); |
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554 #ifdef _LP64 |
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555 idealreg2spillmask[Op_RegN]->OR(*idealreg2regmask[Op_RegF]); |
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556 idealreg2spillmask[Op_RegL]->OR(*idealreg2regmask[Op_RegD]); |
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557 idealreg2spillmask[Op_RegD]->OR(*idealreg2regmask[Op_RegL]); |
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558 idealreg2spillmask[Op_RegP]->OR(*idealreg2regmask[Op_RegD]); |
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559 #else |
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560 idealreg2spillmask[Op_RegP]->OR(*idealreg2regmask[Op_RegF]); |
3909 | 561 #ifdef ARM |
562 // ARM has support for moving 64bit values between a pair of | |
563 // integer registers and a double register | |
564 idealreg2spillmask[Op_RegL]->OR(*idealreg2regmask[Op_RegD]); | |
565 idealreg2spillmask[Op_RegD]->OR(*idealreg2regmask[Op_RegL]); | |
566 #endif | |
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567 #endif |
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568 } |
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569 |
0 | 570 // Make up debug masks. Any spill slot plus callee-save registers. |
571 // Caller-save registers are assumed to be trashable by the various | |
572 // inline-cache fixup routines. | |
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573 *idealreg2debugmask [Op_RegN]= *idealreg2spillmask[Op_RegN]; |
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574 *idealreg2debugmask [Op_RegI]= *idealreg2spillmask[Op_RegI]; |
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575 *idealreg2debugmask [Op_RegL]= *idealreg2spillmask[Op_RegL]; |
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576 *idealreg2debugmask [Op_RegF]= *idealreg2spillmask[Op_RegF]; |
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577 *idealreg2debugmask [Op_RegD]= *idealreg2spillmask[Op_RegD]; |
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578 *idealreg2debugmask [Op_RegP]= *idealreg2spillmask[Op_RegP]; |
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579 |
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580 *idealreg2mhdebugmask[Op_RegN]= *idealreg2spillmask[Op_RegN]; |
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581 *idealreg2mhdebugmask[Op_RegI]= *idealreg2spillmask[Op_RegI]; |
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582 *idealreg2mhdebugmask[Op_RegL]= *idealreg2spillmask[Op_RegL]; |
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583 *idealreg2mhdebugmask[Op_RegF]= *idealreg2spillmask[Op_RegF]; |
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584 *idealreg2mhdebugmask[Op_RegD]= *idealreg2spillmask[Op_RegD]; |
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585 *idealreg2mhdebugmask[Op_RegP]= *idealreg2spillmask[Op_RegP]; |
0 | 586 |
587 // Prevent stub compilations from attempting to reference | |
588 // callee-saved registers from debug info | |
589 bool exclude_soe = !Compile::current()->is_method_compilation(); | |
590 | |
591 for( i=OptoReg::Name(0); i<OptoReg::Name(_last_Mach_Reg); i = OptoReg::add(i,1) ) { | |
592 // registers the caller has to save do not work | |
593 if( _register_save_policy[i] == 'C' || | |
594 _register_save_policy[i] == 'A' || | |
595 (_register_save_policy[i] == 'E' && exclude_soe) ) { | |
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596 idealreg2debugmask [Op_RegN]->Remove(i); |
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597 idealreg2debugmask [Op_RegI]->Remove(i); // Exclude save-on-call |
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598 idealreg2debugmask [Op_RegL]->Remove(i); // registers from debug |
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599 idealreg2debugmask [Op_RegF]->Remove(i); // masks |
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600 idealreg2debugmask [Op_RegD]->Remove(i); |
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601 idealreg2debugmask [Op_RegP]->Remove(i); |
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602 |
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603 idealreg2mhdebugmask[Op_RegN]->Remove(i); |
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604 idealreg2mhdebugmask[Op_RegI]->Remove(i); |
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605 idealreg2mhdebugmask[Op_RegL]->Remove(i); |
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606 idealreg2mhdebugmask[Op_RegF]->Remove(i); |
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607 idealreg2mhdebugmask[Op_RegD]->Remove(i); |
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608 idealreg2mhdebugmask[Op_RegP]->Remove(i); |
0 | 609 } |
610 } | |
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611 |
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612 // Subtract the register we use to save the SP for MethodHandle |
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613 // invokes to from the debug mask. |
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614 const RegMask save_mask = method_handle_invoke_SP_save_mask(); |
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615 idealreg2mhdebugmask[Op_RegN]->SUBTRACT(save_mask); |
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616 idealreg2mhdebugmask[Op_RegI]->SUBTRACT(save_mask); |
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617 idealreg2mhdebugmask[Op_RegL]->SUBTRACT(save_mask); |
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618 idealreg2mhdebugmask[Op_RegF]->SUBTRACT(save_mask); |
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619 idealreg2mhdebugmask[Op_RegD]->SUBTRACT(save_mask); |
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620 idealreg2mhdebugmask[Op_RegP]->SUBTRACT(save_mask); |
0 | 621 } |
622 | |
623 //---------------------------is_save_on_entry---------------------------------- | |
624 bool Matcher::is_save_on_entry( int reg ) { | |
625 return | |
626 _register_save_policy[reg] == 'E' || | |
627 _register_save_policy[reg] == 'A' || // Save-on-entry register? | |
628 // Also save argument registers in the trampolining stubs | |
629 (C->save_argument_registers() && is_spillable_arg(reg)); | |
630 } | |
631 | |
632 //---------------------------Fixup_Save_On_Entry------------------------------- | |
633 void Matcher::Fixup_Save_On_Entry( ) { | |
634 init_first_stack_mask(); | |
635 | |
636 Node *root = C->root(); // Short name for root | |
637 // Count number of save-on-entry registers. | |
638 uint soe_cnt = number_of_saved_registers(); | |
639 uint i; | |
640 | |
641 // Find the procedure Start Node | |
642 StartNode *start = C->start(); | |
643 assert( start, "Expect a start node" ); | |
644 | |
645 // Save argument registers in the trampolining stubs | |
646 if( C->save_argument_registers() ) | |
647 for( i = 0; i < _last_Mach_Reg; i++ ) | |
648 if( is_spillable_arg(i) ) | |
649 soe_cnt++; | |
650 | |
651 // Input RegMask array shared by all Returns. | |
652 // The type for doubles and longs has a count of 2, but | |
653 // there is only 1 returned value | |
654 uint ret_edge_cnt = TypeFunc::Parms + ((C->tf()->range()->cnt() == TypeFunc::Parms) ? 0 : 1); | |
655 RegMask *ret_rms = init_input_masks( ret_edge_cnt + soe_cnt, _return_addr_mask, c_frame_ptr_mask ); | |
656 // Returns have 0 or 1 returned values depending on call signature. | |
657 // Return register is specified by return_value in the AD file. | |
658 if (ret_edge_cnt > TypeFunc::Parms) | |
659 ret_rms[TypeFunc::Parms+0] = _return_value_mask; | |
660 | |
661 // Input RegMask array shared by all Rethrows. | |
662 uint reth_edge_cnt = TypeFunc::Parms+1; | |
663 RegMask *reth_rms = init_input_masks( reth_edge_cnt + soe_cnt, _return_addr_mask, c_frame_ptr_mask ); | |
664 // Rethrow takes exception oop only, but in the argument 0 slot. | |
665 reth_rms[TypeFunc::Parms] = mreg2regmask[find_receiver(false)]; | |
666 #ifdef _LP64 | |
667 // Need two slots for ptrs in 64-bit land | |
668 reth_rms[TypeFunc::Parms].Insert(OptoReg::add(OptoReg::Name(find_receiver(false)),1)); | |
669 #endif | |
670 | |
671 // Input RegMask array shared by all TailCalls | |
672 uint tail_call_edge_cnt = TypeFunc::Parms+2; | |
673 RegMask *tail_call_rms = init_input_masks( tail_call_edge_cnt + soe_cnt, _return_addr_mask, c_frame_ptr_mask ); | |
674 | |
675 // Input RegMask array shared by all TailJumps | |
676 uint tail_jump_edge_cnt = TypeFunc::Parms+2; | |
677 RegMask *tail_jump_rms = init_input_masks( tail_jump_edge_cnt + soe_cnt, _return_addr_mask, c_frame_ptr_mask ); | |
678 | |
679 // TailCalls have 2 returned values (target & moop), whose masks come | |
680 // from the usual MachNode/MachOper mechanism. Find a sample | |
681 // TailCall to extract these masks and put the correct masks into | |
682 // the tail_call_rms array. | |
683 for( i=1; i < root->req(); i++ ) { | |
684 MachReturnNode *m = root->in(i)->as_MachReturn(); | |
685 if( m->ideal_Opcode() == Op_TailCall ) { | |
686 tail_call_rms[TypeFunc::Parms+0] = m->MachNode::in_RegMask(TypeFunc::Parms+0); | |
687 tail_call_rms[TypeFunc::Parms+1] = m->MachNode::in_RegMask(TypeFunc::Parms+1); | |
688 break; | |
689 } | |
690 } | |
691 | |
692 // TailJumps have 2 returned values (target & ex_oop), whose masks come | |
693 // from the usual MachNode/MachOper mechanism. Find a sample | |
694 // TailJump to extract these masks and put the correct masks into | |
695 // the tail_jump_rms array. | |
696 for( i=1; i < root->req(); i++ ) { | |
697 MachReturnNode *m = root->in(i)->as_MachReturn(); | |
698 if( m->ideal_Opcode() == Op_TailJump ) { | |
699 tail_jump_rms[TypeFunc::Parms+0] = m->MachNode::in_RegMask(TypeFunc::Parms+0); | |
700 tail_jump_rms[TypeFunc::Parms+1] = m->MachNode::in_RegMask(TypeFunc::Parms+1); | |
701 break; | |
702 } | |
703 } | |
704 | |
705 // Input RegMask array shared by all Halts | |
706 uint halt_edge_cnt = TypeFunc::Parms; | |
707 RegMask *halt_rms = init_input_masks( halt_edge_cnt + soe_cnt, _return_addr_mask, c_frame_ptr_mask ); | |
708 | |
709 // Capture the return input masks into each exit flavor | |
710 for( i=1; i < root->req(); i++ ) { | |
711 MachReturnNode *exit = root->in(i)->as_MachReturn(); | |
712 switch( exit->ideal_Opcode() ) { | |
713 case Op_Return : exit->_in_rms = ret_rms; break; | |
714 case Op_Rethrow : exit->_in_rms = reth_rms; break; | |
715 case Op_TailCall : exit->_in_rms = tail_call_rms; break; | |
716 case Op_TailJump : exit->_in_rms = tail_jump_rms; break; | |
717 case Op_Halt : exit->_in_rms = halt_rms; break; | |
718 default : ShouldNotReachHere(); | |
719 } | |
720 } | |
721 | |
722 // Next unused projection number from Start. | |
723 int proj_cnt = C->tf()->domain()->cnt(); | |
724 | |
725 // Do all the save-on-entry registers. Make projections from Start for | |
726 // them, and give them a use at the exit points. To the allocator, they | |
727 // look like incoming register arguments. | |
728 for( i = 0; i < _last_Mach_Reg; i++ ) { | |
729 if( is_save_on_entry(i) ) { | |
730 | |
731 // Add the save-on-entry to the mask array | |
732 ret_rms [ ret_edge_cnt] = mreg2regmask[i]; | |
733 reth_rms [ reth_edge_cnt] = mreg2regmask[i]; | |
734 tail_call_rms[tail_call_edge_cnt] = mreg2regmask[i]; | |
735 tail_jump_rms[tail_jump_edge_cnt] = mreg2regmask[i]; | |
736 // Halts need the SOE registers, but only in the stack as debug info. | |
737 // A just-prior uncommon-trap or deoptimization will use the SOE regs. | |
738 halt_rms [ halt_edge_cnt] = *idealreg2spillmask[_register_save_type[i]]; | |
739 | |
740 Node *mproj; | |
741 | |
742 // Is this a RegF low half of a RegD? Double up 2 adjacent RegF's | |
743 // into a single RegD. | |
744 if( (i&1) == 0 && | |
745 _register_save_type[i ] == Op_RegF && | |
746 _register_save_type[i+1] == Op_RegF && | |
747 is_save_on_entry(i+1) ) { | |
748 // Add other bit for double | |
749 ret_rms [ ret_edge_cnt].Insert(OptoReg::Name(i+1)); | |
750 reth_rms [ reth_edge_cnt].Insert(OptoReg::Name(i+1)); | |
751 tail_call_rms[tail_call_edge_cnt].Insert(OptoReg::Name(i+1)); | |
752 tail_jump_rms[tail_jump_edge_cnt].Insert(OptoReg::Name(i+1)); | |
753 halt_rms [ halt_edge_cnt].Insert(OptoReg::Name(i+1)); | |
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754 mproj = new (C) MachProjNode( start, proj_cnt, ret_rms[ret_edge_cnt], Op_RegD ); |
0 | 755 proj_cnt += 2; // Skip 2 for doubles |
756 } | |
757 else if( (i&1) == 1 && // Else check for high half of double | |
758 _register_save_type[i-1] == Op_RegF && | |
759 _register_save_type[i ] == Op_RegF && | |
760 is_save_on_entry(i-1) ) { | |
761 ret_rms [ ret_edge_cnt] = RegMask::Empty; | |
762 reth_rms [ reth_edge_cnt] = RegMask::Empty; | |
763 tail_call_rms[tail_call_edge_cnt] = RegMask::Empty; | |
764 tail_jump_rms[tail_jump_edge_cnt] = RegMask::Empty; | |
765 halt_rms [ halt_edge_cnt] = RegMask::Empty; | |
766 mproj = C->top(); | |
767 } | |
768 // Is this a RegI low half of a RegL? Double up 2 adjacent RegI's | |
769 // into a single RegL. | |
770 else if( (i&1) == 0 && | |
771 _register_save_type[i ] == Op_RegI && | |
772 _register_save_type[i+1] == Op_RegI && | |
773 is_save_on_entry(i+1) ) { | |
774 // Add other bit for long | |
775 ret_rms [ ret_edge_cnt].Insert(OptoReg::Name(i+1)); | |
776 reth_rms [ reth_edge_cnt].Insert(OptoReg::Name(i+1)); | |
777 tail_call_rms[tail_call_edge_cnt].Insert(OptoReg::Name(i+1)); | |
778 tail_jump_rms[tail_jump_edge_cnt].Insert(OptoReg::Name(i+1)); | |
779 halt_rms [ halt_edge_cnt].Insert(OptoReg::Name(i+1)); | |
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780 mproj = new (C) MachProjNode( start, proj_cnt, ret_rms[ret_edge_cnt], Op_RegL ); |
0 | 781 proj_cnt += 2; // Skip 2 for longs |
782 } | |
783 else if( (i&1) == 1 && // Else check for high half of long | |
784 _register_save_type[i-1] == Op_RegI && | |
785 _register_save_type[i ] == Op_RegI && | |
786 is_save_on_entry(i-1) ) { | |
787 ret_rms [ ret_edge_cnt] = RegMask::Empty; | |
788 reth_rms [ reth_edge_cnt] = RegMask::Empty; | |
789 tail_call_rms[tail_call_edge_cnt] = RegMask::Empty; | |
790 tail_jump_rms[tail_jump_edge_cnt] = RegMask::Empty; | |
791 halt_rms [ halt_edge_cnt] = RegMask::Empty; | |
792 mproj = C->top(); | |
793 } else { | |
794 // Make a projection for it off the Start | |
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795 mproj = new (C) MachProjNode( start, proj_cnt++, ret_rms[ret_edge_cnt], _register_save_type[i] ); |
0 | 796 } |
797 | |
798 ret_edge_cnt ++; | |
799 reth_edge_cnt ++; | |
800 tail_call_edge_cnt ++; | |
801 tail_jump_edge_cnt ++; | |
802 halt_edge_cnt ++; | |
803 | |
804 // Add a use of the SOE register to all exit paths | |
805 for( uint j=1; j < root->req(); j++ ) | |
806 root->in(j)->add_req(mproj); | |
807 } // End of if a save-on-entry register | |
808 } // End of for all machine registers | |
809 } | |
810 | |
811 //------------------------------init_spill_mask-------------------------------- | |
812 void Matcher::init_spill_mask( Node *ret ) { | |
813 if( idealreg2regmask[Op_RegI] ) return; // One time only init | |
814 | |
815 OptoReg::c_frame_pointer = c_frame_pointer(); | |
816 c_frame_ptr_mask = c_frame_pointer(); | |
817 #ifdef _LP64 | |
818 // pointers are twice as big | |
819 c_frame_ptr_mask.Insert(OptoReg::add(c_frame_pointer(),1)); | |
820 #endif | |
821 | |
822 // Start at OptoReg::stack0() | |
823 STACK_ONLY_mask.Clear(); | |
824 OptoReg::Name init = OptoReg::stack2reg(0); | |
825 // STACK_ONLY_mask is all stack bits | |
826 OptoReg::Name i; | |
827 for (i = init; RegMask::can_represent(i); i = OptoReg::add(i,1)) | |
828 STACK_ONLY_mask.Insert(i); | |
829 // Also set the "infinite stack" bit. | |
830 STACK_ONLY_mask.set_AllStack(); | |
831 | |
832 // Copy the register names over into the shared world | |
833 for( i=OptoReg::Name(0); i<OptoReg::Name(_last_Mach_Reg); i = OptoReg::add(i,1) ) { | |
834 // SharedInfo::regName[i] = regName[i]; | |
835 // Handy RegMasks per machine register | |
836 mreg2regmask[i].Insert(i); | |
837 } | |
838 | |
839 // Grab the Frame Pointer | |
840 Node *fp = ret->in(TypeFunc::FramePtr); | |
841 Node *mem = ret->in(TypeFunc::Memory); | |
842 const TypePtr* atp = TypePtr::BOTTOM; | |
843 // Share frame pointer while making spill ops | |
844 set_shared(fp); | |
845 | |
846 // Compute generic short-offset Loads | |
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847 #ifdef _LP64 |
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848 MachNode *spillCP = match_tree(new (C) LoadNNode(NULL,mem,fp,atp,TypeInstPtr::BOTTOM,MemNode::unordered)); |
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849 #endif |
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850 MachNode *spillI = match_tree(new (C) LoadINode(NULL,mem,fp,atp,TypeInt::INT,MemNode::unordered)); |
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851 MachNode *spillL = match_tree(new (C) LoadLNode(NULL,mem,fp,atp,TypeLong::LONG,MemNode::unordered,false)); |
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852 MachNode *spillF = match_tree(new (C) LoadFNode(NULL,mem,fp,atp,Type::FLOAT,MemNode::unordered)); |
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853 MachNode *spillD = match_tree(new (C) LoadDNode(NULL,mem,fp,atp,Type::DOUBLE,MemNode::unordered)); |
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854 MachNode *spillP = match_tree(new (C) LoadPNode(NULL,mem,fp,atp,TypeInstPtr::BOTTOM,MemNode::unordered)); |
0 | 855 assert(spillI != NULL && spillL != NULL && spillF != NULL && |
856 spillD != NULL && spillP != NULL, ""); | |
857 // Get the ADLC notion of the right regmask, for each basic type. | |
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858 #ifdef _LP64 |
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859 idealreg2regmask[Op_RegN] = &spillCP->out_RegMask(); |
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860 #endif |
0 | 861 idealreg2regmask[Op_RegI] = &spillI->out_RegMask(); |
862 idealreg2regmask[Op_RegL] = &spillL->out_RegMask(); | |
863 idealreg2regmask[Op_RegF] = &spillF->out_RegMask(); | |
864 idealreg2regmask[Op_RegD] = &spillD->out_RegMask(); | |
865 idealreg2regmask[Op_RegP] = &spillP->out_RegMask(); | |
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866 |
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867 // Vector regmasks. |
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868 if (Matcher::vector_size_supported(T_BYTE,4)) { |
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869 TypeVect::VECTS = TypeVect::make(T_BYTE, 4); |
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870 MachNode *spillVectS = match_tree(new (C) LoadVectorNode(NULL,mem,fp,atp,TypeVect::VECTS)); |
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871 idealreg2regmask[Op_VecS] = &spillVectS->out_RegMask(); |
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872 } |
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873 if (Matcher::vector_size_supported(T_FLOAT,2)) { |
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874 MachNode *spillVectD = match_tree(new (C) LoadVectorNode(NULL,mem,fp,atp,TypeVect::VECTD)); |
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875 idealreg2regmask[Op_VecD] = &spillVectD->out_RegMask(); |
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876 } |
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877 if (Matcher::vector_size_supported(T_FLOAT,4)) { |
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878 MachNode *spillVectX = match_tree(new (C) LoadVectorNode(NULL,mem,fp,atp,TypeVect::VECTX)); |
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879 idealreg2regmask[Op_VecX] = &spillVectX->out_RegMask(); |
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880 } |
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881 if (Matcher::vector_size_supported(T_FLOAT,8)) { |
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882 MachNode *spillVectY = match_tree(new (C) LoadVectorNode(NULL,mem,fp,atp,TypeVect::VECTY)); |
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883 idealreg2regmask[Op_VecY] = &spillVectY->out_RegMask(); |
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884 } |
0 | 885 } |
886 | |
887 #ifdef ASSERT | |
888 static void match_alias_type(Compile* C, Node* n, Node* m) { | |
889 if (!VerifyAliases) return; // do not go looking for trouble by default | |
890 const TypePtr* nat = n->adr_type(); | |
891 const TypePtr* mat = m->adr_type(); | |
892 int nidx = C->get_alias_index(nat); | |
893 int midx = C->get_alias_index(mat); | |
894 // Detune the assert for cases like (AndI 0xFF (LoadB p)). | |
895 if (nidx == Compile::AliasIdxTop && midx >= Compile::AliasIdxRaw) { | |
896 for (uint i = 1; i < n->req(); i++) { | |
897 Node* n1 = n->in(i); | |
898 const TypePtr* n1at = n1->adr_type(); | |
899 if (n1at != NULL) { | |
900 nat = n1at; | |
901 nidx = C->get_alias_index(n1at); | |
902 } | |
903 } | |
904 } | |
905 // %%% Kludgery. Instead, fix ideal adr_type methods for all these cases: | |
906 if (nidx == Compile::AliasIdxTop && midx == Compile::AliasIdxRaw) { | |
907 switch (n->Opcode()) { | |
908 case Op_PrefetchRead: | |
909 case Op_PrefetchWrite: | |
3854 | 910 case Op_PrefetchAllocation: |
0 | 911 nidx = Compile::AliasIdxRaw; |
912 nat = TypeRawPtr::BOTTOM; | |
913 break; | |
914 } | |
915 } | |
916 if (nidx == Compile::AliasIdxRaw && midx == Compile::AliasIdxTop) { | |
917 switch (n->Opcode()) { | |
918 case Op_ClearArray: | |
919 midx = Compile::AliasIdxRaw; | |
920 mat = TypeRawPtr::BOTTOM; | |
921 break; | |
922 } | |
923 } | |
924 if (nidx == Compile::AliasIdxTop && midx == Compile::AliasIdxBot) { | |
925 switch (n->Opcode()) { | |
926 case Op_Return: | |
927 case Op_Rethrow: | |
928 case Op_Halt: | |
929 case Op_TailCall: | |
930 case Op_TailJump: | |
931 nidx = Compile::AliasIdxBot; | |
932 nat = TypePtr::BOTTOM; | |
933 break; | |
934 } | |
935 } | |
936 if (nidx == Compile::AliasIdxBot && midx == Compile::AliasIdxTop) { | |
937 switch (n->Opcode()) { | |
938 case Op_StrComp: | |
681 | 939 case Op_StrEquals: |
940 case Op_StrIndexOf: | |
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941 case Op_AryEq: |
0 | 942 case Op_MemBarVolatile: |
943 case Op_MemBarCPUOrder: // %%% these ideals should have narrower adr_type? | |
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944 case Op_EncodeISOArray: |
0 | 945 nidx = Compile::AliasIdxTop; |
946 nat = NULL; | |
947 break; | |
948 } | |
949 } | |
950 if (nidx != midx) { | |
951 if (PrintOpto || (PrintMiscellaneous && (WizardMode || Verbose))) { | |
952 tty->print_cr("==== Matcher alias shift %d => %d", nidx, midx); | |
953 n->dump(); | |
954 m->dump(); | |
955 } | |
956 assert(C->subsume_loads() && C->must_alias(nat, midx), | |
957 "must not lose alias info when matching"); | |
958 } | |
959 } | |
960 #endif | |
961 | |
962 | |
963 //------------------------------MStack----------------------------------------- | |
964 // State and MStack class used in xform() and find_shared() iterative methods. | |
965 enum Node_State { Pre_Visit, // node has to be pre-visited | |
966 Visit, // visit node | |
967 Post_Visit, // post-visit node | |
968 Alt_Post_Visit // alternative post-visit path | |
969 }; | |
970 | |
971 class MStack: public Node_Stack { | |
972 public: | |
973 MStack(int size) : Node_Stack(size) { } | |
974 | |
975 void push(Node *n, Node_State ns) { | |
976 Node_Stack::push(n, (uint)ns); | |
977 } | |
978 void push(Node *n, Node_State ns, Node *parent, int indx) { | |
979 ++_inode_top; | |
980 if ((_inode_top + 1) >= _inode_max) grow(); | |
981 _inode_top->node = parent; | |
982 _inode_top->indx = (uint)indx; | |
983 ++_inode_top; | |
984 _inode_top->node = n; | |
985 _inode_top->indx = (uint)ns; | |
986 } | |
987 Node *parent() { | |
988 pop(); | |
989 return node(); | |
990 } | |
991 Node_State state() const { | |
992 return (Node_State)index(); | |
993 } | |
994 void set_state(Node_State ns) { | |
995 set_index((uint)ns); | |
996 } | |
997 }; | |
998 | |
999 | |
1000 //------------------------------xform------------------------------------------ | |
1001 // Given a Node in old-space, Match him (Label/Reduce) to produce a machine | |
1002 // Node in new-space. Given a new-space Node, recursively walk his children. | |
1003 Node *Matcher::transform( Node *n ) { ShouldNotCallThis(); return n; } | |
1004 Node *Matcher::xform( Node *n, int max_stack ) { | |
1005 // Use one stack to keep both: child's node/state and parent's node/index | |
1006 MStack mstack(max_stack * 2 * 2); // C->unique() * 2 * 2 | |
1007 mstack.push(n, Visit, NULL, -1); // set NULL as parent to indicate root | |
1008 | |
1009 while (mstack.is_nonempty()) { | |
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1010 C->check_node_count(NodeLimitFudgeFactor, "too many nodes matching instructions"); |
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1011 if (C->failing()) return NULL; |
0 | 1012 n = mstack.node(); // Leave node on stack |
1013 Node_State nstate = mstack.state(); | |
1014 if (nstate == Visit) { | |
1015 mstack.set_state(Post_Visit); | |
1016 Node *oldn = n; | |
1017 // Old-space or new-space check | |
1018 if (!C->node_arena()->contains(n)) { | |
1019 // Old space! | |
1020 Node* m; | |
1021 if (has_new_node(n)) { // Not yet Label/Reduced | |
1022 m = new_node(n); | |
1023 } else { | |
1024 if (!is_dontcare(n)) { // Matcher can match this guy | |
1025 // Calls match special. They match alone with no children. | |
1026 // Their children, the incoming arguments, match normally. | |
1027 m = n->is_SafePoint() ? match_sfpt(n->as_SafePoint()):match_tree(n); | |
1028 if (C->failing()) return NULL; | |
1029 if (m == NULL) { Matcher::soft_match_failure(); return NULL; } | |
1030 } else { // Nothing the matcher cares about | |
1031 if( n->is_Proj() && n->in(0)->is_Multi()) { // Projections? | |
1032 // Convert to machine-dependent projection | |
1033 m = n->in(0)->as_Multi()->match( n->as_Proj(), this ); | |
222 | 1034 #ifdef ASSERT |
1035 _new2old_map.map(m->_idx, n); | |
1036 #endif | |
0 | 1037 if (m->in(0) != NULL) // m might be top |
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1038 collect_null_checks(m, n); |
0 | 1039 } else { // Else just a regular 'ol guy |
1040 m = n->clone(); // So just clone into new-space | |
222 | 1041 #ifdef ASSERT |
1042 _new2old_map.map(m->_idx, n); | |
1043 #endif | |
0 | 1044 // Def-Use edges will be added incrementally as Uses |
1045 // of this node are matched. | |
1046 assert(m->outcnt() == 0, "no Uses of this clone yet"); | |
1047 } | |
1048 } | |
1049 | |
1050 set_new_node(n, m); // Map old to new | |
1051 if (_old_node_note_array != NULL) { | |
1052 Node_Notes* nn = C->locate_node_notes(_old_node_note_array, | |
1053 n->_idx); | |
1054 C->set_node_notes_at(m->_idx, nn); | |
1055 } | |
1056 debug_only(match_alias_type(C, n, m)); | |
1057 } | |
1058 n = m; // n is now a new-space node | |
1059 mstack.set_node(n); | |
1060 } | |
1061 | |
1062 // New space! | |
1063 if (_visited.test_set(n->_idx)) continue; // while(mstack.is_nonempty()) | |
1064 | |
1065 int i; | |
1066 // Put precedence edges on stack first (match them last). | |
1067 for (i = oldn->req(); (uint)i < oldn->len(); i++) { | |
1068 Node *m = oldn->in(i); | |
1069 if (m == NULL) break; | |
1070 // set -1 to call add_prec() instead of set_req() during Step1 | |
1071 mstack.push(m, Visit, n, -1); | |
1072 } | |
1073 | |
1074 // For constant debug info, I'd rather have unmatched constants. | |
1075 int cnt = n->req(); | |
1076 JVMState* jvms = n->jvms(); | |
1077 int debug_cnt = jvms ? jvms->debug_start() : cnt; | |
1078 | |
1079 // Now do only debug info. Clone constants rather than matching. | |
1080 // Constants are represented directly in the debug info without | |
1081 // the need for executable machine instructions. | |
1082 // Monitor boxes are also represented directly. | |
1083 for (i = cnt - 1; i >= debug_cnt; --i) { // For all debug inputs do | |
1084 Node *m = n->in(i); // Get input | |
1085 int op = m->Opcode(); | |
1086 assert((op == Op_BoxLock) == jvms->is_monitor_use(i), "boxes only at monitor sites"); | |
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1087 if( op == Op_ConI || op == Op_ConP || op == Op_ConN || op == Op_ConNKlass || |
0 | 1088 op == Op_ConF || op == Op_ConD || op == Op_ConL |
1089 // || op == Op_BoxLock // %%%% enable this and remove (+++) in chaitin.cpp | |
1090 ) { | |
1091 m = m->clone(); | |
222 | 1092 #ifdef ASSERT |
1093 _new2old_map.map(m->_idx, n); | |
1094 #endif | |
605 | 1095 mstack.push(m, Post_Visit, n, i); // Don't need to visit |
0 | 1096 mstack.push(m->in(0), Visit, m, 0); |
1097 } else { | |
1098 mstack.push(m, Visit, n, i); | |
1099 } | |
1100 } | |
1101 | |
1102 // And now walk his children, and convert his inputs to new-space. | |
1103 for( ; i >= 0; --i ) { // For all normal inputs do | |
1104 Node *m = n->in(i); // Get input | |
1105 if(m != NULL) | |
1106 mstack.push(m, Visit, n, i); | |
1107 } | |
1108 | |
1109 } | |
1110 else if (nstate == Post_Visit) { | |
1111 // Set xformed input | |
1112 Node *p = mstack.parent(); | |
1113 if (p != NULL) { // root doesn't have parent | |
1114 int i = (int)mstack.index(); | |
1115 if (i >= 0) | |
1116 p->set_req(i, n); // required input | |
1117 else if (i == -1) | |
1118 p->add_prec(n); // precedence input | |
1119 else | |
1120 ShouldNotReachHere(); | |
1121 } | |
1122 mstack.pop(); // remove processed node from stack | |
1123 } | |
1124 else { | |
1125 ShouldNotReachHere(); | |
1126 } | |
1127 } // while (mstack.is_nonempty()) | |
1128 return n; // Return new-space Node | |
1129 } | |
1130 | |
1131 //------------------------------warp_outgoing_stk_arg------------------------ | |
1132 OptoReg::Name Matcher::warp_outgoing_stk_arg( VMReg reg, OptoReg::Name begin_out_arg_area, OptoReg::Name &out_arg_limit_per_call ) { | |
1133 // Convert outgoing argument location to a pre-biased stack offset | |
1134 if (reg->is_stack()) { | |
1135 OptoReg::Name warped = reg->reg2stack(); | |
1136 // Adjust the stack slot offset to be the register number used | |
1137 // by the allocator. | |
1138 warped = OptoReg::add(begin_out_arg_area, warped); | |
1139 // Keep track of the largest numbered stack slot used for an arg. | |
1140 // Largest used slot per call-site indicates the amount of stack | |
1141 // that is killed by the call. | |
1142 if( warped >= out_arg_limit_per_call ) | |
1143 out_arg_limit_per_call = OptoReg::add(warped,1); | |
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1144 if (!RegMask::can_represent_arg(warped)) { |
0 | 1145 C->record_method_not_compilable_all_tiers("unsupported calling sequence"); |
1146 return OptoReg::Bad; | |
1147 } | |
1148 return warped; | |
1149 } | |
1150 return OptoReg::as_OptoReg(reg); | |
1151 } | |
1152 | |
1153 | |
1154 //------------------------------match_sfpt------------------------------------- | |
1155 // Helper function to match call instructions. Calls match special. | |
1156 // They match alone with no children. Their children, the incoming | |
1157 // arguments, match normally. | |
1158 MachNode *Matcher::match_sfpt( SafePointNode *sfpt ) { | |
1159 MachSafePointNode *msfpt = NULL; | |
1160 MachCallNode *mcall = NULL; | |
1161 uint cnt; | |
1162 // Split out case for SafePoint vs Call | |
1163 CallNode *call; | |
1164 const TypeTuple *domain; | |
1165 ciMethod* method = NULL; | |
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1166 bool is_method_handle_invoke = false; // for special kill effects |
0 | 1167 if( sfpt->is_Call() ) { |
1168 call = sfpt->as_Call(); | |
1169 domain = call->tf()->domain(); | |
1170 cnt = domain->cnt(); | |
1171 | |
1172 // Match just the call, nothing else | |
1173 MachNode *m = match_tree(call); | |
1174 if (C->failing()) return NULL; | |
1175 if( m == NULL ) { Matcher::soft_match_failure(); return NULL; } | |
1176 | |
1177 // Copy data from the Ideal SafePoint to the machine version | |
1178 mcall = m->as_MachCall(); | |
1179 | |
1180 mcall->set_tf( call->tf()); | |
1181 mcall->set_entry_point(call->entry_point()); | |
1182 mcall->set_cnt( call->cnt()); | |
1183 | |
1184 if( mcall->is_MachCallJava() ) { | |
1185 MachCallJavaNode *mcall_java = mcall->as_MachCallJava(); | |
1186 const CallJavaNode *call_java = call->as_CallJava(); | |
1187 method = call_java->method(); | |
1188 mcall_java->_method = method; | |
1189 mcall_java->_bci = call_java->_bci; | |
1190 mcall_java->_optimized_virtual = call_java->is_optimized_virtual(); | |
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1191 is_method_handle_invoke = call_java->is_method_handle_invoke(); |
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1192 mcall_java->_method_handle_invoke = is_method_handle_invoke; |
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1193 if (is_method_handle_invoke) { |
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1194 C->set_has_method_handle_invokes(true); |
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1195 } |
0 | 1196 if( mcall_java->is_MachCallStaticJava() ) |
1197 mcall_java->as_MachCallStaticJava()->_name = | |
1198 call_java->as_CallStaticJava()->_name; | |
1199 if( mcall_java->is_MachCallDynamicJava() ) | |
1200 mcall_java->as_MachCallDynamicJava()->_vtable_index = | |
1201 call_java->as_CallDynamicJava()->_vtable_index; | |
1202 } | |
1203 else if( mcall->is_MachCallRuntime() ) { | |
1204 mcall->as_MachCallRuntime()->_name = call->as_CallRuntime()->_name; | |
1205 } | |
1206 msfpt = mcall; | |
1207 } | |
1208 // This is a non-call safepoint | |
1209 else { | |
1210 call = NULL; | |
1211 domain = NULL; | |
1212 MachNode *mn = match_tree(sfpt); | |
1213 if (C->failing()) return NULL; | |
1214 msfpt = mn->as_MachSafePoint(); | |
1215 cnt = TypeFunc::Parms; | |
1216 } | |
1217 | |
1218 // Advertise the correct memory effects (for anti-dependence computation). | |
1219 msfpt->set_adr_type(sfpt->adr_type()); | |
1220 | |
1221 // Allocate a private array of RegMasks. These RegMasks are not shared. | |
1222 msfpt->_in_rms = NEW_RESOURCE_ARRAY( RegMask, cnt ); | |
1223 // Empty them all. | |
1224 memset( msfpt->_in_rms, 0, sizeof(RegMask)*cnt ); | |
1225 | |
1226 // Do all the pre-defined non-Empty register masks | |
1227 msfpt->_in_rms[TypeFunc::ReturnAdr] = _return_addr_mask; | |
1228 msfpt->_in_rms[TypeFunc::FramePtr ] = c_frame_ptr_mask; | |
1229 | |
1230 // Place first outgoing argument can possibly be put. | |
1231 OptoReg::Name begin_out_arg_area = OptoReg::add(_new_SP, C->out_preserve_stack_slots()); | |
1232 assert( is_even(begin_out_arg_area), "" ); | |
1233 // Compute max outgoing register number per call site. | |
1234 OptoReg::Name out_arg_limit_per_call = begin_out_arg_area; | |
1235 // Calls to C may hammer extra stack slots above and beyond any arguments. | |
1236 // These are usually backing store for register arguments for varargs. | |
1237 if( call != NULL && call->is_CallRuntime() ) | |
1238 out_arg_limit_per_call = OptoReg::add(out_arg_limit_per_call,C->varargs_C_out_slots_killed()); | |
1239 | |
1240 | |
1241 // Do the normal argument list (parameters) register masks | |
1242 int argcnt = cnt - TypeFunc::Parms; | |
1243 if( argcnt > 0 ) { // Skip it all if we have no args | |
1244 BasicType *sig_bt = NEW_RESOURCE_ARRAY( BasicType, argcnt ); | |
1245 VMRegPair *parm_regs = NEW_RESOURCE_ARRAY( VMRegPair, argcnt ); | |
1246 int i; | |
1247 for( i = 0; i < argcnt; i++ ) { | |
1248 sig_bt[i] = domain->field_at(i+TypeFunc::Parms)->basic_type(); | |
1249 } | |
1250 // V-call to pick proper calling convention | |
1251 call->calling_convention( sig_bt, parm_regs, argcnt ); | |
1252 | |
1253 #ifdef ASSERT | |
1254 // Sanity check users' calling convention. Really handy during | |
1255 // the initial porting effort. Fairly expensive otherwise. | |
1256 { for (int i = 0; i<argcnt; i++) { | |
1257 if( !parm_regs[i].first()->is_valid() && | |
1258 !parm_regs[i].second()->is_valid() ) continue; | |
1259 VMReg reg1 = parm_regs[i].first(); | |
1260 VMReg reg2 = parm_regs[i].second(); | |
1261 for (int j = 0; j < i; j++) { | |
1262 if( !parm_regs[j].first()->is_valid() && | |
1263 !parm_regs[j].second()->is_valid() ) continue; | |
1264 VMReg reg3 = parm_regs[j].first(); | |
1265 VMReg reg4 = parm_regs[j].second(); | |
1266 if( !reg1->is_valid() ) { | |
1267 assert( !reg2->is_valid(), "valid halvsies" ); | |
1268 } else if( !reg3->is_valid() ) { | |
1269 assert( !reg4->is_valid(), "valid halvsies" ); | |
1270 } else { | |
1271 assert( reg1 != reg2, "calling conv. must produce distinct regs"); | |
1272 assert( reg1 != reg3, "calling conv. must produce distinct regs"); | |
1273 assert( reg1 != reg4, "calling conv. must produce distinct regs"); | |
1274 assert( reg2 != reg3, "calling conv. must produce distinct regs"); | |
1275 assert( reg2 != reg4 || !reg2->is_valid(), "calling conv. must produce distinct regs"); | |
1276 assert( reg3 != reg4, "calling conv. must produce distinct regs"); | |
1277 } | |
1278 } | |
1279 } | |
1280 } | |
1281 #endif | |
1282 | |
1283 // Visit each argument. Compute its outgoing register mask. | |
1284 // Return results now can have 2 bits returned. | |
1285 // Compute max over all outgoing arguments both per call-site | |
1286 // and over the entire method. | |
1287 for( i = 0; i < argcnt; i++ ) { | |
1288 // Address of incoming argument mask to fill in | |
1289 RegMask *rm = &mcall->_in_rms[i+TypeFunc::Parms]; | |
1290 if( !parm_regs[i].first()->is_valid() && | |
1291 !parm_regs[i].second()->is_valid() ) { | |
1292 continue; // Avoid Halves | |
1293 } | |
1294 // Grab first register, adjust stack slots and insert in mask. | |
1295 OptoReg::Name reg1 = warp_outgoing_stk_arg(parm_regs[i].first(), begin_out_arg_area, out_arg_limit_per_call ); | |
1296 if (OptoReg::is_valid(reg1)) | |
1297 rm->Insert( reg1 ); | |
1298 // Grab second register (if any), adjust stack slots and insert in mask. | |
1299 OptoReg::Name reg2 = warp_outgoing_stk_arg(parm_regs[i].second(), begin_out_arg_area, out_arg_limit_per_call ); | |
1300 if (OptoReg::is_valid(reg2)) | |
1301 rm->Insert( reg2 ); | |
1302 } // End of for all arguments | |
1303 | |
1304 // Compute number of stack slots needed to restore stack in case of | |
1305 // Pascal-style argument popping. | |
1306 mcall->_argsize = out_arg_limit_per_call - begin_out_arg_area; | |
1307 } | |
1308 | |
1309 // Compute the max stack slot killed by any call. These will not be | |
1310 // available for debug info, and will be used to adjust FIRST_STACK_mask | |
1311 // after all call sites have been visited. | |
1312 if( _out_arg_limit < out_arg_limit_per_call) | |
1313 _out_arg_limit = out_arg_limit_per_call; | |
1314 | |
1315 if (mcall) { | |
1316 // Kill the outgoing argument area, including any non-argument holes and | |
1317 // any legacy C-killed slots. Use Fat-Projections to do the killing. | |
1318 // Since the max-per-method covers the max-per-call-site and debug info | |
1319 // is excluded on the max-per-method basis, debug info cannot land in | |
1320 // this killed area. | |
1321 uint r_cnt = mcall->tf()->range()->cnt(); | |
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1322 MachProjNode *proj = new (C) MachProjNode( mcall, r_cnt+10000, RegMask::Empty, MachProjNode::fat_proj ); |
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1323 if (!RegMask::can_represent_arg(OptoReg::Name(out_arg_limit_per_call-1))) { |
0 | 1324 C->record_method_not_compilable_all_tiers("unsupported outgoing calling sequence"); |
1325 } else { | |
1326 for (int i = begin_out_arg_area; i < out_arg_limit_per_call; i++) | |
1327 proj->_rout.Insert(OptoReg::Name(i)); | |
1328 } | |
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1329 if (proj->_rout.is_NotEmpty()) { |
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1330 push_projection(proj); |
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1331 } |
0 | 1332 } |
1333 // Transfer the safepoint information from the call to the mcall | |
1334 // Move the JVMState list | |
1335 msfpt->set_jvms(sfpt->jvms()); | |
1336 for (JVMState* jvms = msfpt->jvms(); jvms; jvms = jvms->caller()) { | |
1337 jvms->set_map(sfpt); | |
1338 } | |
1339 | |
1340 // Debug inputs begin just after the last incoming parameter | |
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1341 assert((mcall == NULL) || (mcall->jvms() == NULL) || |
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1342 (mcall->jvms()->debug_start() + mcall->_jvmadj == mcall->tf()->domain()->cnt()), ""); |
0 | 1343 |
1344 // Move the OopMap | |
1345 msfpt->_oop_map = sfpt->_oop_map; | |
1346 | |
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1347 // Add additional edges. |
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1348 if (msfpt->mach_constant_base_node_input() != (uint)-1 && !msfpt->is_MachCallLeaf()) { |
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1349 // For these calls we can not add MachConstantBase in expand(), as the |
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1350 // ins are not complete then. |
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1351 msfpt->ins_req(msfpt->mach_constant_base_node_input(), C->mach_constant_base_node()); |
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1352 if (msfpt->jvms() && |
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1353 msfpt->mach_constant_base_node_input() <= msfpt->jvms()->debug_start() + msfpt->_jvmadj) { |
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1354 // We added an edge before jvms, so we must adapt the position of the ins. |
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1355 msfpt->jvms()->adapt_position(+1); |
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1356 } |
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1357 } |
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1358 |
0 | 1359 // Registers killed by the call are set in the local scheduling pass |
1360 // of Global Code Motion. | |
1361 return msfpt; | |
1362 } | |
1363 | |
1364 //---------------------------match_tree---------------------------------------- | |
1365 // Match a Ideal Node DAG - turn it into a tree; Label & Reduce. Used as part | |
1366 // of the whole-sale conversion from Ideal to Mach Nodes. Also used for | |
1367 // making GotoNodes while building the CFG and in init_spill_mask() to identify | |
1368 // a Load's result RegMask for memoization in idealreg2regmask[] | |
1369 MachNode *Matcher::match_tree( const Node *n ) { | |
1370 assert( n->Opcode() != Op_Phi, "cannot match" ); | |
1371 assert( !n->is_block_start(), "cannot match" ); | |
1372 // Set the mark for all locally allocated State objects. | |
1373 // When this call returns, the _states_arena arena will be reset | |
1374 // freeing all State objects. | |
1375 ResourceMark rm( &_states_arena ); | |
1376 | |
1377 LabelRootDepth = 0; | |
1378 | |
1379 // StoreNodes require their Memory input to match any LoadNodes | |
1380 Node *mem = n->is_Store() ? n->in(MemNode::Memory) : (Node*)1 ; | |
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1381 #ifdef ASSERT |
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1382 Node* save_mem_node = _mem_node; |
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1383 _mem_node = n->is_Store() ? (Node*)n : NULL; |
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1384 #endif |
0 | 1385 // State object for root node of match tree |
1386 // Allocate it on _states_arena - stack allocation can cause stack overflow. | |
1387 State *s = new (&_states_arena) State; | |
1388 s->_kids[0] = NULL; | |
1389 s->_kids[1] = NULL; | |
1390 s->_leaf = (Node*)n; | |
1391 // Label the input tree, allocating labels from top-level arena | |
1392 Label_Root( n, s, n->in(0), mem ); | |
1393 if (C->failing()) return NULL; | |
1394 | |
1395 // The minimum cost match for the whole tree is found at the root State | |
1396 uint mincost = max_juint; | |
1397 uint cost = max_juint; | |
1398 uint i; | |
1399 for( i = 0; i < NUM_OPERANDS; i++ ) { | |
1400 if( s->valid(i) && // valid entry and | |
1401 s->_cost[i] < cost && // low cost and | |
1402 s->_rule[i] >= NUM_OPERANDS ) // not an operand | |
1403 cost = s->_cost[mincost=i]; | |
1404 } | |
1405 if (mincost == max_juint) { | |
1406 #ifndef PRODUCT | |
1407 tty->print("No matching rule for:"); | |
1408 s->dump(); | |
1409 #endif | |
1410 Matcher::soft_match_failure(); | |
1411 return NULL; | |
1412 } | |
1413 // Reduce input tree based upon the state labels to machine Nodes | |
1414 MachNode *m = ReduceInst( s, s->_rule[mincost], mem ); | |
1415 #ifdef ASSERT | |
1416 _old2new_map.map(n->_idx, m); | |
222 | 1417 _new2old_map.map(m->_idx, (Node*)n); |
0 | 1418 #endif |
1419 | |
1420 // Add any Matcher-ignored edges | |
1421 uint cnt = n->req(); | |
1422 uint start = 1; | |
1423 if( mem != (Node*)1 ) start = MemNode::Memory+1; | |
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1424 if( n->is_AddP() ) { |
0 | 1425 assert( mem == (Node*)1, "" ); |
1426 start = AddPNode::Base+1; | |
1427 } | |
1428 for( i = start; i < cnt; i++ ) { | |
1429 if( !n->match_edge(i) ) { | |
1430 if( i < m->req() ) | |
1431 m->ins_req( i, n->in(i) ); | |
1432 else | |
1433 m->add_req( n->in(i) ); | |
1434 } | |
1435 } | |
1436 | |
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1437 debug_only( _mem_node = save_mem_node; ) |
0 | 1438 return m; |
1439 } | |
1440 | |
1441 | |
1442 //------------------------------match_into_reg--------------------------------- | |
1443 // Choose to either match this Node in a register or part of the current | |
1444 // match tree. Return true for requiring a register and false for matching | |
1445 // as part of the current match tree. | |
1446 static bool match_into_reg( const Node *n, Node *m, Node *control, int i, bool shared ) { | |
1447 | |
1448 const Type *t = m->bottom_type(); | |
1449 | |
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1450 if (t->singleton()) { |
0 | 1451 // Never force constants into registers. Allow them to match as |
1452 // constants or registers. Copies of the same value will share | |
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1453 // the same register. See find_shared_node. |
0 | 1454 return false; |
1455 } else { // Not a constant | |
1456 // Stop recursion if they have different Controls. | |
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1457 Node* m_control = m->in(0); |
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1458 // Control of load's memory can post-dominates load's control. |
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1459 // So use it since load can't float above its memory. |
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1460 Node* mem_control = (m->is_Load()) ? m->in(MemNode::Memory)->in(0) : NULL; |
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1461 if (control && m_control && control != m_control && control != mem_control) { |
0 | 1462 |
1463 // Actually, we can live with the most conservative control we | |
1464 // find, if it post-dominates the others. This allows us to | |
1465 // pick up load/op/store trees where the load can float a little | |
1466 // above the store. | |
1467 Node *x = control; | |
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1468 const uint max_scan = 6; // Arbitrary scan cutoff |
0 | 1469 uint j; |
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1470 for (j=0; j<max_scan; j++) { |
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1471 if (x->is_Region()) // Bail out at merge points |
0 | 1472 return true; |
1473 x = x->in(0); | |
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1474 if (x == m_control) // Does 'control' post-dominate |
0 | 1475 break; // m->in(0)? If so, we can use it |
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1476 if (x == mem_control) // Does 'control' post-dominate |
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1477 break; // mem_control? If so, we can use it |
0 | 1478 } |
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1479 if (j == max_scan) // No post-domination before scan end? |
0 | 1480 return true; // Then break the match tree up |
1481 } | |
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1482 if ((m->is_DecodeN() && Matcher::narrow_oop_use_complex_address()) || |
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1483 (m->is_DecodeNKlass() && Matcher::narrow_klass_use_complex_address())) { |
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1484 // These are commonly used in address expressions and can |
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1485 // efficiently fold into them on X64 in some cases. |
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1486 return false; |
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1487 } |
0 | 1488 } |
1489 | |
605 | 1490 // Not forceable cloning. If shared, put it into a register. |
0 | 1491 return shared; |
1492 } | |
1493 | |
1494 | |
1495 //------------------------------Instruction Selection-------------------------- | |
1496 // Label method walks a "tree" of nodes, using the ADLC generated DFA to match | |
1497 // ideal nodes to machine instructions. Trees are delimited by shared Nodes, | |
1498 // things the Matcher does not match (e.g., Memory), and things with different | |
1499 // Controls (hence forced into different blocks). We pass in the Control | |
1500 // selected for this entire State tree. | |
1501 | |
1502 // The Matcher works on Trees, but an Intel add-to-memory requires a DAG: the | |
1503 // Store and the Load must have identical Memories (as well as identical | |
1504 // pointers). Since the Matcher does not have anything for Memory (and | |
1505 // does not handle DAGs), I have to match the Memory input myself. If the | |
1506 // Tree root is a Store, I require all Loads to have the identical memory. | |
1507 Node *Matcher::Label_Root( const Node *n, State *svec, Node *control, const Node *mem){ | |
1508 // Since Label_Root is a recursive function, its possible that we might run | |
1509 // out of stack space. See bugs 6272980 & 6227033 for more info. | |
1510 LabelRootDepth++; | |
1511 if (LabelRootDepth > MaxLabelRootDepth) { | |
1512 C->record_method_not_compilable_all_tiers("Out of stack space, increase MaxLabelRootDepth"); | |
1513 return NULL; | |
1514 } | |
1515 uint care = 0; // Edges matcher cares about | |
1516 uint cnt = n->req(); | |
1517 uint i = 0; | |
1518 | |
1519 // Examine children for memory state | |
1520 // Can only subsume a child into your match-tree if that child's memory state | |
1521 // is not modified along the path to another input. | |
1522 // It is unsafe even if the other inputs are separate roots. | |
1523 Node *input_mem = NULL; | |
1524 for( i = 1; i < cnt; i++ ) { | |
1525 if( !n->match_edge(i) ) continue; | |
1526 Node *m = n->in(i); // Get ith input | |
1527 assert( m, "expect non-null children" ); | |
1528 if( m->is_Load() ) { | |
1529 if( input_mem == NULL ) { | |
1530 input_mem = m->in(MemNode::Memory); | |
1531 } else if( input_mem != m->in(MemNode::Memory) ) { | |
1532 input_mem = NodeSentinel; | |
1533 } | |
1534 } | |
1535 } | |
1536 | |
1537 for( i = 1; i < cnt; i++ ){// For my children | |
1538 if( !n->match_edge(i) ) continue; | |
1539 Node *m = n->in(i); // Get ith input | |
1540 // Allocate states out of a private arena | |
1541 State *s = new (&_states_arena) State; | |
1542 svec->_kids[care++] = s; | |
1543 assert( care <= 2, "binary only for now" ); | |
1544 | |
1545 // Recursively label the State tree. | |
1546 s->_kids[0] = NULL; | |
1547 s->_kids[1] = NULL; | |
1548 s->_leaf = m; | |
1549 | |
1550 // Check for leaves of the State Tree; things that cannot be a part of | |
1551 // the current tree. If it finds any, that value is matched as a | |
1552 // register operand. If not, then the normal matching is used. | |
1553 if( match_into_reg(n, m, control, i, is_shared(m)) || | |
1554 // | |
1555 // Stop recursion if this is LoadNode and the root of this tree is a | |
1556 // StoreNode and the load & store have different memories. | |
1557 ((mem!=(Node*)1) && m->is_Load() && m->in(MemNode::Memory) != mem) || | |
1558 // Can NOT include the match of a subtree when its memory state | |
1559 // is used by any of the other subtrees | |
1560 (input_mem == NodeSentinel) ) { | |
1561 #ifndef PRODUCT | |
1562 // Print when we exclude matching due to different memory states at input-loads | |
1563 if( PrintOpto && (Verbose && WizardMode) && (input_mem == NodeSentinel) | |
1564 && !((mem!=(Node*)1) && m->is_Load() && m->in(MemNode::Memory) != mem) ) { | |
1565 tty->print_cr("invalid input_mem"); | |
1566 } | |
1567 #endif | |
1568 // Switch to a register-only opcode; this value must be in a register | |
1569 // and cannot be subsumed as part of a larger instruction. | |
1570 s->DFA( m->ideal_reg(), m ); | |
1571 | |
1572 } else { | |
1573 // If match tree has no control and we do, adopt it for entire tree | |
1574 if( control == NULL && m->in(0) != NULL && m->req() > 1 ) | |
1575 control = m->in(0); // Pick up control | |
1576 // Else match as a normal part of the match tree. | |
1577 control = Label_Root(m,s,control,mem); | |
1578 if (C->failing()) return NULL; | |
1579 } | |
1580 } | |
1581 | |
1582 | |
1583 // Call DFA to match this node, and return | |
1584 svec->DFA( n->Opcode(), n ); | |
1585 | |
1586 #ifdef ASSERT | |
1587 uint x; | |
1588 for( x = 0; x < _LAST_MACH_OPER; x++ ) | |
1589 if( svec->valid(x) ) | |
1590 break; | |
1591 | |
1592 if (x >= _LAST_MACH_OPER) { | |
1593 n->dump(); | |
1594 svec->dump(); | |
1595 assert( false, "bad AD file" ); | |
1596 } | |
1597 #endif | |
1598 return control; | |
1599 } | |
1600 | |
1601 | |
1602 // Con nodes reduced using the same rule can share their MachNode | |
1603 // which reduces the number of copies of a constant in the final | |
1604 // program. The register allocator is free to split uses later to | |
1605 // split live ranges. | |
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1606 MachNode* Matcher::find_shared_node(Node* leaf, uint rule) { |
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1607 if (!leaf->is_Con() && !leaf->is_DecodeNarrowPtr()) return NULL; |
0 | 1608 |
1609 // See if this Con has already been reduced using this rule. | |
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1610 if (_shared_nodes.Size() <= leaf->_idx) return NULL; |
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1611 MachNode* last = (MachNode*)_shared_nodes.at(leaf->_idx); |
0 | 1612 if (last != NULL && rule == last->rule()) { |
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1613 // Don't expect control change for DecodeN |
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1614 if (leaf->is_DecodeNarrowPtr()) |
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1615 return last; |
0 | 1616 // Get the new space root. |
1617 Node* xroot = new_node(C->root()); | |
1618 if (xroot == NULL) { | |
1619 // This shouldn't happen give the order of matching. | |
1620 return NULL; | |
1621 } | |
1622 | |
1623 // Shared constants need to have their control be root so they | |
1624 // can be scheduled properly. | |
1625 Node* control = last->in(0); | |
1626 if (control != xroot) { | |
1627 if (control == NULL || control == C->root()) { | |
1628 last->set_req(0, xroot); | |
1629 } else { | |
1630 assert(false, "unexpected control"); | |
1631 return NULL; | |
1632 } | |
1633 } | |
1634 return last; | |
1635 } | |
1636 return NULL; | |
1637 } | |
1638 | |
1639 | |
1640 //------------------------------ReduceInst------------------------------------- | |
1641 // Reduce a State tree (with given Control) into a tree of MachNodes. | |
1642 // This routine (and it's cohort ReduceOper) convert Ideal Nodes into | |
1643 // complicated machine Nodes. Each MachNode covers some tree of Ideal Nodes. | |
1644 // Each MachNode has a number of complicated MachOper operands; each | |
1645 // MachOper also covers a further tree of Ideal Nodes. | |
1646 | |
1647 // The root of the Ideal match tree is always an instruction, so we enter | |
1648 // the recursion here. After building the MachNode, we need to recurse | |
1649 // the tree checking for these cases: | |
1650 // (1) Child is an instruction - | |
1651 // Build the instruction (recursively), add it as an edge. | |
1652 // Build a simple operand (register) to hold the result of the instruction. | |
1653 // (2) Child is an interior part of an instruction - | |
1654 // Skip over it (do nothing) | |
1655 // (3) Child is the start of a operand - | |
1656 // Build the operand, place it inside the instruction | |
1657 // Call ReduceOper. | |
1658 MachNode *Matcher::ReduceInst( State *s, int rule, Node *&mem ) { | |
1659 assert( rule >= NUM_OPERANDS, "called with operand rule" ); | |
1660 | |
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1661 MachNode* shared_node = find_shared_node(s->_leaf, rule); |
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1662 if (shared_node != NULL) { |
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1663 return shared_node; |
0 | 1664 } |
1665 | |
1666 // Build the object to represent this state & prepare for recursive calls | |
1667 MachNode *mach = s->MachNodeGenerator( rule, C ); | |
1668 mach->_opnds[0] = s->MachOperGenerator( _reduceOp[rule], C ); | |
1669 assert( mach->_opnds[0] != NULL, "Missing result operand" ); | |
1670 Node *leaf = s->_leaf; | |
1671 // Check for instruction or instruction chain rule | |
1672 if( rule >= _END_INST_CHAIN_RULE || rule < _BEGIN_INST_CHAIN_RULE ) { | |
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1673 assert(C->node_arena()->contains(s->_leaf) || !has_new_node(s->_leaf), |
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1674 "duplicating node that's already been matched"); |
0 | 1675 // Instruction |
1676 mach->add_req( leaf->in(0) ); // Set initial control | |
1677 // Reduce interior of complex instruction | |
1678 ReduceInst_Interior( s, rule, mem, mach, 1 ); | |
1679 } else { | |
1680 // Instruction chain rules are data-dependent on their inputs | |
1681 mach->add_req(0); // Set initial control to none | |
1682 ReduceInst_Chain_Rule( s, rule, mem, mach ); | |
1683 } | |
1684 | |
1685 // If a Memory was used, insert a Memory edge | |
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1686 if( mem != (Node*)1 ) { |
0 | 1687 mach->ins_req(MemNode::Memory,mem); |
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1688 #ifdef ASSERT |
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1689 // Verify adr type after matching memory operation |
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1690 const MachOper* oper = mach->memory_operand(); |
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1691 if (oper != NULL && oper != (MachOper*)-1) { |
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1692 // It has a unique memory operand. Find corresponding ideal mem node. |
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1693 Node* m = NULL; |
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1694 if (leaf->is_Mem()) { |
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1695 m = leaf; |
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1696 } else { |
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1697 m = _mem_node; |
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1698 assert(m != NULL && m->is_Mem(), "expecting memory node"); |
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1699 } |
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1700 const Type* mach_at = mach->adr_type(); |
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1701 // DecodeN node consumed by an address may have different type |
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1702 // then its input. Don't compare types for such case. |
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1703 if (m->adr_type() != mach_at && |
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1704 (m->in(MemNode::Address)->is_DecodeNarrowPtr() || |
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1705 m->in(MemNode::Address)->is_AddP() && |
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1706 m->in(MemNode::Address)->in(AddPNode::Address)->is_DecodeNarrowPtr() || |
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1707 m->in(MemNode::Address)->is_AddP() && |
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1708 m->in(MemNode::Address)->in(AddPNode::Address)->is_AddP() && |
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1709 m->in(MemNode::Address)->in(AddPNode::Address)->in(AddPNode::Address)->is_DecodeNarrowPtr())) { |
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1710 mach_at = m->adr_type(); |
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1711 } |
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1712 if (m->adr_type() != mach_at) { |
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1713 m->dump(); |
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1714 tty->print_cr("mach:"); |
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1715 mach->dump(1); |
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1716 } |
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1717 assert(m->adr_type() == mach_at, "matcher should not change adr type"); |
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1718 } |
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1719 #endif |
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1720 } |
0 | 1721 |
1722 // If the _leaf is an AddP, insert the base edge | |
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1723 if (leaf->is_AddP()) { |
0 | 1724 mach->ins_req(AddPNode::Base,leaf->in(AddPNode::Base)); |
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1725 } |
0 | 1726 |
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1727 uint number_of_projections_prior = number_of_projections(); |
0 | 1728 |
1729 // Perform any 1-to-many expansions required | |
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1730 MachNode *ex = mach->Expand(s, _projection_list, mem); |
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1731 if (ex != mach) { |
0 | 1732 assert(ex->ideal_reg() == mach->ideal_reg(), "ideal types should match"); |
1733 if( ex->in(1)->is_Con() ) | |
1734 ex->in(1)->set_req(0, C->root()); | |
1735 // Remove old node from the graph | |
1736 for( uint i=0; i<mach->req(); i++ ) { | |
1737 mach->set_req(i,NULL); | |
1738 } | |
222 | 1739 #ifdef ASSERT |
1740 _new2old_map.map(ex->_idx, s->_leaf); | |
1741 #endif | |
0 | 1742 } |
1743 | |
1744 // PhaseChaitin::fixup_spills will sometimes generate spill code | |
1745 // via the matcher. By the time, nodes have been wired into the CFG, | |
1746 // and any further nodes generated by expand rules will be left hanging | |
1747 // in space, and will not get emitted as output code. Catch this. | |
1748 // Also, catch any new register allocation constraints ("projections") | |
1749 // generated belatedly during spill code generation. | |
1750 if (_allocation_started) { | |
1751 guarantee(ex == mach, "no expand rules during spill generation"); | |
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1752 guarantee(number_of_projections_prior == number_of_projections(), "no allocation during spill generation"); |
0 | 1753 } |
1754 | |
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1755 if (leaf->is_Con() || leaf->is_DecodeNarrowPtr()) { |
0 | 1756 // Record the con for sharing |
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1757 _shared_nodes.map(leaf->_idx, ex); |
0 | 1758 } |
1759 | |
1760 return ex; | |
1761 } | |
1762 | |
1763 void Matcher::ReduceInst_Chain_Rule( State *s, int rule, Node *&mem, MachNode *mach ) { | |
1764 // 'op' is what I am expecting to receive | |
1765 int op = _leftOp[rule]; | |
1766 // Operand type to catch childs result | |
1767 // This is what my child will give me. | |
1768 int opnd_class_instance = s->_rule[op]; | |
1769 // Choose between operand class or not. | |
605 | 1770 // This is what I will receive. |
0 | 1771 int catch_op = (FIRST_OPERAND_CLASS <= op && op < NUM_OPERANDS) ? opnd_class_instance : op; |
1772 // New rule for child. Chase operand classes to get the actual rule. | |
1773 int newrule = s->_rule[catch_op]; | |
1774 | |
1775 if( newrule < NUM_OPERANDS ) { | |
1776 // Chain from operand or operand class, may be output of shared node | |
1777 assert( 0 <= opnd_class_instance && opnd_class_instance < NUM_OPERANDS, | |
1778 "Bad AD file: Instruction chain rule must chain from operand"); | |
1779 // Insert operand into array of operands for this instruction | |
1780 mach->_opnds[1] = s->MachOperGenerator( opnd_class_instance, C ); | |
1781 | |
1782 ReduceOper( s, newrule, mem, mach ); | |
1783 } else { | |
1784 // Chain from the result of an instruction | |
1785 assert( newrule >= _LAST_MACH_OPER, "Do NOT chain from internal operand"); | |
1786 mach->_opnds[1] = s->MachOperGenerator( _reduceOp[catch_op], C ); | |
1787 Node *mem1 = (Node*)1; | |
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1788 debug_only(Node *save_mem_node = _mem_node;) |
0 | 1789 mach->add_req( ReduceInst(s, newrule, mem1) ); |
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1790 debug_only(_mem_node = save_mem_node;) |
0 | 1791 } |
1792 return; | |
1793 } | |
1794 | |
1795 | |
1796 uint Matcher::ReduceInst_Interior( State *s, int rule, Node *&mem, MachNode *mach, uint num_opnds ) { | |
1797 if( s->_leaf->is_Load() ) { | |
1798 Node *mem2 = s->_leaf->in(MemNode::Memory); | |
1799 assert( mem == (Node*)1 || mem == mem2, "multiple Memories being matched at once?" ); | |
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1800 debug_only( if( mem == (Node*)1 ) _mem_node = s->_leaf;) |
0 | 1801 mem = mem2; |
1802 } | |
1803 if( s->_leaf->in(0) != NULL && s->_leaf->req() > 1) { | |
1804 if( mach->in(0) == NULL ) | |
1805 mach->set_req(0, s->_leaf->in(0)); | |
1806 } | |
1807 | |
1808 // Now recursively walk the state tree & add operand list. | |
1809 for( uint i=0; i<2; i++ ) { // binary tree | |
1810 State *newstate = s->_kids[i]; | |
1811 if( newstate == NULL ) break; // Might only have 1 child | |
1812 // 'op' is what I am expecting to receive | |
1813 int op; | |
1814 if( i == 0 ) { | |
1815 op = _leftOp[rule]; | |
1816 } else { | |
1817 op = _rightOp[rule]; | |
1818 } | |
1819 // Operand type to catch childs result | |
1820 // This is what my child will give me. | |
1821 int opnd_class_instance = newstate->_rule[op]; | |
1822 // Choose between operand class or not. | |
1823 // This is what I will receive. | |
1824 int catch_op = (op >= FIRST_OPERAND_CLASS && op < NUM_OPERANDS) ? opnd_class_instance : op; | |
1825 // New rule for child. Chase operand classes to get the actual rule. | |
1826 int newrule = newstate->_rule[catch_op]; | |
1827 | |
1828 if( newrule < NUM_OPERANDS ) { // Operand/operandClass or internalOp/instruction? | |
1829 // Operand/operandClass | |
1830 // Insert operand into array of operands for this instruction | |
1831 mach->_opnds[num_opnds++] = newstate->MachOperGenerator( opnd_class_instance, C ); | |
1832 ReduceOper( newstate, newrule, mem, mach ); | |
1833 | |
1834 } else { // Child is internal operand or new instruction | |
1835 if( newrule < _LAST_MACH_OPER ) { // internal operand or instruction? | |
1836 // internal operand --> call ReduceInst_Interior | |
1837 // Interior of complex instruction. Do nothing but recurse. | |
1838 num_opnds = ReduceInst_Interior( newstate, newrule, mem, mach, num_opnds ); | |
1839 } else { | |
1840 // instruction --> call build operand( ) to catch result | |
1841 // --> ReduceInst( newrule ) | |
1842 mach->_opnds[num_opnds++] = s->MachOperGenerator( _reduceOp[catch_op], C ); | |
1843 Node *mem1 = (Node*)1; | |
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1844 debug_only(Node *save_mem_node = _mem_node;) |
0 | 1845 mach->add_req( ReduceInst( newstate, newrule, mem1 ) ); |
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1846 debug_only(_mem_node = save_mem_node;) |
0 | 1847 } |
1848 } | |
1849 assert( mach->_opnds[num_opnds-1], "" ); | |
1850 } | |
1851 return num_opnds; | |
1852 } | |
1853 | |
1854 // This routine walks the interior of possible complex operands. | |
1855 // At each point we check our children in the match tree: | |
1856 // (1) No children - | |
1857 // We are a leaf; add _leaf field as an input to the MachNode | |
1858 // (2) Child is an internal operand - | |
1859 // Skip over it ( do nothing ) | |
1860 // (3) Child is an instruction - | |
1861 // Call ReduceInst recursively and | |
1862 // and instruction as an input to the MachNode | |
1863 void Matcher::ReduceOper( State *s, int rule, Node *&mem, MachNode *mach ) { | |
1864 assert( rule < _LAST_MACH_OPER, "called with operand rule" ); | |
1865 State *kid = s->_kids[0]; | |
1866 assert( kid == NULL || s->_leaf->in(0) == NULL, "internal operands have no control" ); | |
1867 | |
1868 // Leaf? And not subsumed? | |
1869 if( kid == NULL && !_swallowed[rule] ) { | |
1870 mach->add_req( s->_leaf ); // Add leaf pointer | |
1871 return; // Bail out | |
1872 } | |
1873 | |
1874 if( s->_leaf->is_Load() ) { | |
1875 assert( mem == (Node*)1, "multiple Memories being matched at once?" ); | |
1876 mem = s->_leaf->in(MemNode::Memory); | |
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1877 debug_only(_mem_node = s->_leaf;) |
0 | 1878 } |
1879 if( s->_leaf->in(0) && s->_leaf->req() > 1) { | |
1880 if( !mach->in(0) ) | |
1881 mach->set_req(0,s->_leaf->in(0)); | |
1882 else { | |
1883 assert( s->_leaf->in(0) == mach->in(0), "same instruction, differing controls?" ); | |
1884 } | |
1885 } | |
1886 | |
1887 for( uint i=0; kid != NULL && i<2; kid = s->_kids[1], i++ ) { // binary tree | |
1888 int newrule; | |
10405 | 1889 if( i == 0) |
0 | 1890 newrule = kid->_rule[_leftOp[rule]]; |
1891 else | |
1892 newrule = kid->_rule[_rightOp[rule]]; | |
1893 | |
1894 if( newrule < _LAST_MACH_OPER ) { // Operand or instruction? | |
1895 // Internal operand; recurse but do nothing else | |
1896 ReduceOper( kid, newrule, mem, mach ); | |
1897 | |
1898 } else { // Child is a new instruction | |
1899 // Reduce the instruction, and add a direct pointer from this | |
1900 // machine instruction to the newly reduced one. | |
1901 Node *mem1 = (Node*)1; | |
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1902 debug_only(Node *save_mem_node = _mem_node;) |
0 | 1903 mach->add_req( ReduceInst( kid, newrule, mem1 ) ); |
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1904 debug_only(_mem_node = save_mem_node;) |
0 | 1905 } |
1906 } | |
1907 } | |
1908 | |
1909 | |
1910 // ------------------------------------------------------------------------- | |
1911 // Java-Java calling convention | |
1912 // (what you use when Java calls Java) | |
1913 | |
1914 //------------------------------find_receiver---------------------------------- | |
1915 // For a given signature, return the OptoReg for parameter 0. | |
1916 OptoReg::Name Matcher::find_receiver( bool is_outgoing ) { | |
1917 VMRegPair regs; | |
1918 BasicType sig_bt = T_OBJECT; | |
1919 calling_convention(&sig_bt, ®s, 1, is_outgoing); | |
1920 // Return argument 0 register. In the LP64 build pointers | |
1921 // take 2 registers, but the VM wants only the 'main' name. | |
1922 return OptoReg::as_OptoReg(regs.first()); | |
1923 } | |
1924 | |
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1925 // This function identifies sub-graphs in which a 'load' node is |
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1926 // input to two different nodes, and such that it can be matched |
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1927 // with BMI instructions like blsi, blsr, etc. |
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1928 // Example : for b = -a[i] & a[i] can be matched to blsi r32, m32. |
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1929 // The graph is (AndL (SubL Con0 LoadL*) LoadL*), where LoadL* |
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1930 // refers to the same node. |
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1931 #ifdef X86 |
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1932 // Match the generic fused operations pattern (op1 (op2 Con{ConType} mop) mop) |
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1933 // This is a temporary solution until we make DAGs expressible in ADL. |
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1934 template<typename ConType> |
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1935 class FusedPatternMatcher { |
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1936 Node* _op1_node; |
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1937 Node* _mop_node; |
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1938 int _con_op; |
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1939 |
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1940 static int match_next(Node* n, int next_op, int next_op_idx) { |
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1941 if (n->in(1) == NULL || n->in(2) == NULL) { |
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1942 return -1; |
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1943 } |
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1944 |
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1945 if (next_op_idx == -1) { // n is commutative, try rotations |
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1946 if (n->in(1)->Opcode() == next_op) { |
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1947 return 1; |
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1948 } else if (n->in(2)->Opcode() == next_op) { |
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1949 return 2; |
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1950 } |
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1951 } else { |
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1952 assert(next_op_idx > 0 && next_op_idx <= 2, "Bad argument index"); |
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1953 if (n->in(next_op_idx)->Opcode() == next_op) { |
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1954 return next_op_idx; |
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1955 } |
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1956 } |
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1957 return -1; |
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1958 } |
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1959 public: |
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1960 FusedPatternMatcher(Node* op1_node, Node *mop_node, int con_op) : |
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1961 _op1_node(op1_node), _mop_node(mop_node), _con_op(con_op) { } |
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1962 |
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1963 bool match(int op1, int op1_op2_idx, // op1 and the index of the op1->op2 edge, -1 if op1 is commutative |
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1964 int op2, int op2_con_idx, // op2 and the index of the op2->con edge, -1 if op2 is commutative |
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1965 typename ConType::NativeType con_value) { |
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1966 if (_op1_node->Opcode() != op1) { |
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1967 return false; |
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1968 } |
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1969 if (_mop_node->outcnt() > 2) { |
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1970 return false; |
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1971 } |
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1972 op1_op2_idx = match_next(_op1_node, op2, op1_op2_idx); |
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1973 if (op1_op2_idx == -1) { |
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1974 return false; |
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1975 } |
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1976 // Memory operation must be the other edge |
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1977 int op1_mop_idx = (op1_op2_idx & 1) + 1; |
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1978 |
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1979 // Check that the mop node is really what we want |
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1980 if (_op1_node->in(op1_mop_idx) == _mop_node) { |
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1981 Node *op2_node = _op1_node->in(op1_op2_idx); |
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1982 if (op2_node->outcnt() > 1) { |
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1983 return false; |
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1984 } |
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1985 assert(op2_node->Opcode() == op2, "Should be"); |
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1986 op2_con_idx = match_next(op2_node, _con_op, op2_con_idx); |
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1987 if (op2_con_idx == -1) { |
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1988 return false; |
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1989 } |
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1990 // Memory operation must be the other edge |
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1991 int op2_mop_idx = (op2_con_idx & 1) + 1; |
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1992 // Check that the memory operation is the same node |
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1993 if (op2_node->in(op2_mop_idx) == _mop_node) { |
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1994 // Now check the constant |
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1995 const Type* con_type = op2_node->in(op2_con_idx)->bottom_type(); |
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1996 if (con_type != Type::TOP && ConType::as_self(con_type)->get_con() == con_value) { |
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1997 return true; |
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1998 } |
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1999 } |
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2000 } |
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2001 return false; |
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2002 } |
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2003 }; |
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2004 |
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2005 |
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2006 bool Matcher::is_bmi_pattern(Node *n, Node *m) { |
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2007 if (n != NULL && m != NULL) { |
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2008 if (m->Opcode() == Op_LoadI) { |
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2009 FusedPatternMatcher<TypeInt> bmii(n, m, Op_ConI); |
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2010 return bmii.match(Op_AndI, -1, Op_SubI, 1, 0) || |
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2011 bmii.match(Op_AndI, -1, Op_AddI, -1, -1) || |
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2012 bmii.match(Op_XorI, -1, Op_AddI, -1, -1); |
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2013 } else if (m->Opcode() == Op_LoadL) { |
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2014 FusedPatternMatcher<TypeLong> bmil(n, m, Op_ConL); |
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2015 return bmil.match(Op_AndL, -1, Op_SubL, 1, 0) || |
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2016 bmil.match(Op_AndL, -1, Op_AddL, -1, -1) || |
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2017 bmil.match(Op_XorL, -1, Op_AddL, -1, -1); |
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2018 } |
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2019 } |
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2020 return false; |
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2021 } |
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2022 #endif // X86 |
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2023 |
0 | 2024 // A method-klass-holder may be passed in the inline_cache_reg |
2025 // and then expanded into the inline_cache_reg and a method_oop register | |
2026 // defined in ad_<arch>.cpp | |
2027 | |
2028 | |
2029 //------------------------------find_shared------------------------------------ | |
2030 // Set bits if Node is shared or otherwise a root | |
2031 void Matcher::find_shared( Node *n ) { | |
2032 // Allocate stack of size C->unique() * 2 to avoid frequent realloc | |
2033 MStack mstack(C->unique() * 2); | |
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2034 // Mark nodes as address_visited if they are inputs to an address expression |
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2035 VectorSet address_visited(Thread::current()->resource_area()); |
0 | 2036 mstack.push(n, Visit); // Don't need to pre-visit root node |
2037 while (mstack.is_nonempty()) { | |
2038 n = mstack.node(); // Leave node on stack | |
2039 Node_State nstate = mstack.state(); | |
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2040 uint nop = n->Opcode(); |
0 | 2041 if (nstate == Pre_Visit) { |
586
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2042 if (address_visited.test(n->_idx)) { // Visited in address already? |
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2043 // Flag as visited and shared now. |
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2044 set_visited(n); |
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2045 } |
0 | 2046 if (is_visited(n)) { // Visited already? |
2047 // Node is shared and has no reason to clone. Flag it as shared. | |
2048 // This causes it to match into a register for the sharing. | |
2049 set_shared(n); // Flag as shared and | |
2050 mstack.pop(); // remove node from stack | |
2051 continue; | |
2052 } | |
2053 nstate = Visit; // Not already visited; so visit now | |
2054 } | |
2055 if (nstate == Visit) { | |
2056 mstack.set_state(Post_Visit); | |
2057 set_visited(n); // Flag as visited now | |
2058 bool mem_op = false; | |
2059 | |
586
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2060 switch( nop ) { // Handle some opcodes special |
0 | 2061 case Op_Phi: // Treat Phis as shared roots |
2062 case Op_Parm: | |
2063 case Op_Proj: // All handled specially during matching | |
63
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2064 case Op_SafePointScalarObject: |
0 | 2065 set_shared(n); |
2066 set_dontcare(n); | |
2067 break; | |
2068 case Op_If: | |
2069 case Op_CountedLoopEnd: | |
2070 mstack.set_state(Alt_Post_Visit); // Alternative way | |
2071 // Convert (If (Bool (CmpX A B))) into (If (Bool) (CmpX A B)). Helps | |
2072 // with matching cmp/branch in 1 instruction. The Matcher needs the | |
2073 // Bool and CmpX side-by-side, because it can only get at constants | |
2074 // that are at the leaves of Match trees, and the Bool's condition acts | |
2075 // as a constant here. | |
2076 mstack.push(n->in(1), Visit); // Clone the Bool | |
2077 mstack.push(n->in(0), Pre_Visit); // Visit control input | |
2078 continue; // while (mstack.is_nonempty()) | |
2079 case Op_ConvI2D: // These forms efficiently match with a prior | |
2080 case Op_ConvI2F: // Load but not a following Store | |
2081 if( n->in(1)->is_Load() && // Prior load | |
2082 n->outcnt() == 1 && // Not already shared | |
2083 n->unique_out()->is_Store() ) // Following store | |
2084 set_shared(n); // Force it to be a root | |
2085 break; | |
2086 case Op_ReverseBytesI: | |
2087 case Op_ReverseBytesL: | |
2088 if( n->in(1)->is_Load() && // Prior load | |
2089 n->outcnt() == 1 ) // Not already shared | |
2090 set_shared(n); // Force it to be a root | |
2091 break; | |
2092 case Op_BoxLock: // Cant match until we get stack-regs in ADLC | |
2093 case Op_IfFalse: | |
2094 case Op_IfTrue: | |
2095 case Op_MachProj: | |
2096 case Op_MergeMem: | |
2097 case Op_Catch: | |
2098 case Op_CatchProj: | |
2099 case Op_CProj: | |
2100 case Op_JumpProj: | |
2101 case Op_JProj: | |
2102 case Op_NeverBranch: | |
2103 set_dontcare(n); | |
2104 break; | |
2105 case Op_Jump: | |
4064
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2106 mstack.push(n->in(1), Pre_Visit); // Switch Value (could be shared) |
0 | 2107 mstack.push(n->in(0), Pre_Visit); // Visit Control input |
2108 continue; // while (mstack.is_nonempty()) | |
2109 case Op_StrComp: | |
681 | 2110 case Op_StrEquals: |
2111 case Op_StrIndexOf: | |
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2112 case Op_AryEq: |
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2113 case Op_EncodeISOArray: |
0 | 2114 set_shared(n); // Force result into register (it will be anyways) |
2115 break; | |
2116 case Op_ConP: { // Convert pointers above the centerline to NUL | |
2117 TypeNode *tn = n->as_Type(); // Constants derive from type nodes | |
2118 const TypePtr* tp = tn->type()->is_ptr(); | |
2119 if (tp->_ptr == TypePtr::AnyNull) { | |
2120 tn->set_type(TypePtr::NULL_PTR); | |
2121 } | |
2122 break; | |
2123 } | |
163 | 2124 case Op_ConN: { // Convert narrow pointers above the centerline to NUL |
2125 TypeNode *tn = n->as_Type(); // Constants derive from type nodes | |
221
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2126 const TypePtr* tp = tn->type()->make_ptr(); |
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2127 if (tp && tp->_ptr == TypePtr::AnyNull) { |
163 | 2128 tn->set_type(TypeNarrowOop::NULL_PTR); |
2129 } | |
2130 break; | |
2131 } | |
0 | 2132 case Op_Binary: // These are introduced in the Post_Visit state. |
2133 ShouldNotReachHere(); | |
2134 break; | |
2135 case Op_ClearArray: | |
2136 case Op_SafePoint: | |
2137 mem_op = true; | |
2138 break; | |
1061
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2139 default: |
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2140 if( n->is_Store() ) { |
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2141 // Do match stores, despite no ideal reg |
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2142 mem_op = true; |
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2143 break; |
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2144 } |
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2145 if( n->is_Mem() ) { // Loads and LoadStores |
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2146 mem_op = true; |
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2147 // Loads must be root of match tree due to prior load conflict |
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2148 if( C->subsume_loads() == false ) |
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2149 set_shared(n); |
0 | 2150 } |
2151 // Fall into default case | |
2152 if( !n->ideal_reg() ) | |
2153 set_dontcare(n); // Unmatchable Nodes | |
2154 } // end_switch | |
2155 | |
2156 for(int i = n->req() - 1; i >= 0; --i) { // For my children | |
2157 Node *m = n->in(i); // Get ith input | |
2158 if (m == NULL) continue; // Ignore NULLs | |
2159 uint mop = m->Opcode(); | |
2160 | |
2161 // Must clone all producers of flags, or we will not match correctly. | |
2162 // Suppose a compare setting int-flags is shared (e.g., a switch-tree) | |
2163 // then it will match into an ideal Op_RegFlags. Alas, the fp-flags | |
2164 // are also there, so we may match a float-branch to int-flags and | |
2165 // expect the allocator to haul the flags from the int-side to the | |
2166 // fp-side. No can do. | |
2167 if( _must_clone[mop] ) { | |
2168 mstack.push(m, Visit); | |
2169 continue; // for(int i = ...) | |
2170 } | |
2171 | |
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2172 if( mop == Op_AddP && m->in(AddPNode::Base)->is_DecodeNarrowPtr()) { |
1061
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2173 // Bases used in addresses must be shared but since |
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2174 // they are shared through a DecodeN they may appear |
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2175 // to have a single use so force sharing here. |
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2176 set_shared(m->in(AddPNode::Base)->in(1)); |
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2177 } |
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2178 |
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2179 // if 'n' and 'm' are part of a graph for BMI instruction, clone this node. |
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2180 #ifdef X86 |
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2181 if (UseBMI1Instructions && is_bmi_pattern(n, m)) { |
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2182 mstack.push(m, Visit); |
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2183 continue; |
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2184 } |
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2185 #endif |
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2186 |
1061
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2187 // Clone addressing expressions as they are "free" in memory access instructions |
0 | 2188 if( mem_op && i == MemNode::Address && mop == Op_AddP ) { |
586
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2189 // Some inputs for address expression are not put on stack |
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2190 // to avoid marking them as shared and forcing them into register |
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2191 // if they are used only in address expressions. |
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2192 // But they should be marked as shared if there are other uses |
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2193 // besides address expressions. |
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2194 |
0 | 2195 Node *off = m->in(AddPNode::Offset); |
586
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2196 if( off->is_Con() && |
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2197 // When there are other uses besides address expressions |
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2198 // put it on stack and mark as shared. |
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2199 !is_visited(m) ) { |
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2200 address_visited.test_set(m->_idx); // Flag as address_visited |
0 | 2201 Node *adr = m->in(AddPNode::Address); |
2202 | |
2203 // Intel, ARM and friends can handle 2 adds in addressing mode | |
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2204 if( clone_shift_expressions && adr->is_AddP() && |
0 | 2205 // AtomicAdd is not an addressing expression. |
2206 // Cheap to find it by looking for screwy base. | |
586
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2207 !adr->in(AddPNode::Base)->is_top() && |
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2208 // Are there other uses besides address expressions? |
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2209 !is_visited(adr) ) { |
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2210 address_visited.set(adr->_idx); // Flag as address_visited |
0 | 2211 Node *shift = adr->in(AddPNode::Offset); |
2212 // Check for shift by small constant as well | |
2213 if( shift->Opcode() == Op_LShiftX && shift->in(2)->is_Con() && | |
586
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2214 shift->in(2)->get_int() <= 3 && |
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2215 // Are there other uses besides address expressions? |
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2216 !is_visited(shift) ) { |
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2217 address_visited.set(shift->_idx); // Flag as address_visited |
0 | 2218 mstack.push(shift->in(2), Visit); |
586
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2219 Node *conv = shift->in(1); |
0 | 2220 #ifdef _LP64 |
2221 // Allow Matcher to match the rule which bypass | |
2222 // ConvI2L operation for an array index on LP64 | |
2223 // if the index value is positive. | |
586
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2224 if( conv->Opcode() == Op_ConvI2L && |
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2225 conv->as_Type()->type()->is_long()->_lo >= 0 && |
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2226 // Are there other uses besides address expressions? |
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2227 !is_visited(conv) ) { |
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2228 address_visited.set(conv->_idx); // Flag as address_visited |
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2229 mstack.push(conv->in(1), Pre_Visit); |
0 | 2230 } else |
2231 #endif | |
586
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2232 mstack.push(conv, Pre_Visit); |
0 | 2233 } else { |
2234 mstack.push(shift, Pre_Visit); | |
2235 } | |
2236 mstack.push(adr->in(AddPNode::Address), Pre_Visit); | |
2237 mstack.push(adr->in(AddPNode::Base), Pre_Visit); | |
2238 } else { // Sparc, Alpha, PPC and friends | |
2239 mstack.push(adr, Pre_Visit); | |
2240 } | |
2241 | |
2242 // Clone X+offset as it also folds into most addressing expressions | |
2243 mstack.push(off, Visit); | |
2244 mstack.push(m->in(AddPNode::Base), Pre_Visit); | |
2245 continue; // for(int i = ...) | |
2246 } // if( off->is_Con() ) | |
2247 } // if( mem_op && | |
2248 mstack.push(m, Pre_Visit); | |
2249 } // for(int i = ...) | |
2250 } | |
2251 else if (nstate == Alt_Post_Visit) { | |
2252 mstack.pop(); // Remove node from stack | |
2253 // We cannot remove the Cmp input from the Bool here, as the Bool may be | |
2254 // shared and all users of the Bool need to move the Cmp in parallel. | |
2255 // This leaves both the Bool and the If pointing at the Cmp. To | |
2256 // prevent the Matcher from trying to Match the Cmp along both paths | |
2257 // BoolNode::match_edge always returns a zero. | |
2258 | |
2259 // We reorder the Op_If in a pre-order manner, so we can visit without | |
605 | 2260 // accidentally sharing the Cmp (the Bool and the If make 2 users). |
0 | 2261 n->add_req( n->in(1)->in(1) ); // Add the Cmp next to the Bool |
2262 } | |
2263 else if (nstate == Post_Visit) { | |
2264 mstack.pop(); // Remove node from stack | |
2265 | |
2266 // Now hack a few special opcodes | |
2267 switch( n->Opcode() ) { // Handle some opcodes special | |
2268 case Op_StorePConditional: | |
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2269 case Op_StoreIConditional: |
0 | 2270 case Op_StoreLConditional: |
2271 case Op_CompareAndSwapI: | |
2272 case Op_CompareAndSwapL: | |
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2273 case Op_CompareAndSwapP: |
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2274 case Op_CompareAndSwapN: { // Convert trinary to binary-tree |
0 | 2275 Node *newval = n->in(MemNode::ValueIn ); |
6795
7eca5de9e0b6
7023898: Intrinsify AtomicLongFieldUpdater.getAndIncrement()
roland
parents:
6725
diff
changeset
|
2276 Node *oldval = n->in(LoadStoreConditionalNode::ExpectedIn); |
6804
e626685e9f6c
7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents:
6795
diff
changeset
|
2277 Node *pair = new (C) BinaryNode( oldval, newval ); |
0 | 2278 n->set_req(MemNode::ValueIn,pair); |
6795
7eca5de9e0b6
7023898: Intrinsify AtomicLongFieldUpdater.getAndIncrement()
roland
parents:
6725
diff
changeset
|
2279 n->del_req(LoadStoreConditionalNode::ExpectedIn); |
0 | 2280 break; |
2281 } | |
2282 case Op_CMoveD: // Convert trinary to binary-tree | |
2283 case Op_CMoveF: | |
2284 case Op_CMoveI: | |
2285 case Op_CMoveL: | |
164
c436414a719e
6703890: Compressed Oops: add LoadNKlass node to generate narrow oops (32-bits) compare instructions
kvn
parents:
163
diff
changeset
|
2286 case Op_CMoveN: |
0 | 2287 case Op_CMoveP: { |
2288 // Restructure into a binary tree for Matching. It's possible that | |
2289 // we could move this code up next to the graph reshaping for IfNodes | |
2290 // or vice-versa, but I do not want to debug this for Ladybird. | |
2291 // 10/2/2000 CNC. | |
6804
e626685e9f6c
7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents:
6795
diff
changeset
|
2292 Node *pair1 = new (C) BinaryNode(n->in(1),n->in(1)->in(1)); |
0 | 2293 n->set_req(1,pair1); |
6804
e626685e9f6c
7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents:
6795
diff
changeset
|
2294 Node *pair2 = new (C) BinaryNode(n->in(2),n->in(3)); |
0 | 2295 n->set_req(2,pair2); |
2296 n->del_req(3); | |
2297 break; | |
2298 } | |
3345 | 2299 case Op_LoopLimit: { |
6804
e626685e9f6c
7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents:
6795
diff
changeset
|
2300 Node *pair1 = new (C) BinaryNode(n->in(1),n->in(2)); |
3345 | 2301 n->set_req(1,pair1); |
2302 n->set_req(2,n->in(3)); | |
2303 n->del_req(3); | |
2304 break; | |
2305 } | |
986
62001a362ce9
6827605: new String intrinsics may prevent EA scalar replacement
kvn
parents:
851
diff
changeset
|
2306 case Op_StrEquals: { |
6804
e626685e9f6c
7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents:
6795
diff
changeset
|
2307 Node *pair1 = new (C) BinaryNode(n->in(2),n->in(3)); |
986
62001a362ce9
6827605: new String intrinsics may prevent EA scalar replacement
kvn
parents:
851
diff
changeset
|
2308 n->set_req(2,pair1); |
62001a362ce9
6827605: new String intrinsics may prevent EA scalar replacement
kvn
parents:
851
diff
changeset
|
2309 n->set_req(3,n->in(4)); |
62001a362ce9
6827605: new String intrinsics may prevent EA scalar replacement
kvn
parents:
851
diff
changeset
|
2310 n->del_req(4); |
62001a362ce9
6827605: new String intrinsics may prevent EA scalar replacement
kvn
parents:
851
diff
changeset
|
2311 break; |
62001a362ce9
6827605: new String intrinsics may prevent EA scalar replacement
kvn
parents:
851
diff
changeset
|
2312 } |
62001a362ce9
6827605: new String intrinsics may prevent EA scalar replacement
kvn
parents:
851
diff
changeset
|
2313 case Op_StrComp: |
62001a362ce9
6827605: new String intrinsics may prevent EA scalar replacement
kvn
parents:
851
diff
changeset
|
2314 case Op_StrIndexOf: { |
6804
e626685e9f6c
7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents:
6795
diff
changeset
|
2315 Node *pair1 = new (C) BinaryNode(n->in(2),n->in(3)); |
986
62001a362ce9
6827605: new String intrinsics may prevent EA scalar replacement
kvn
parents:
851
diff
changeset
|
2316 n->set_req(2,pair1); |
6804
e626685e9f6c
7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents:
6795
diff
changeset
|
2317 Node *pair2 = new (C) BinaryNode(n->in(4),n->in(5)); |
986
62001a362ce9
6827605: new String intrinsics may prevent EA scalar replacement
kvn
parents:
851
diff
changeset
|
2318 n->set_req(3,pair2); |
62001a362ce9
6827605: new String intrinsics may prevent EA scalar replacement
kvn
parents:
851
diff
changeset
|
2319 n->del_req(5); |
62001a362ce9
6827605: new String intrinsics may prevent EA scalar replacement
kvn
parents:
851
diff
changeset
|
2320 n->del_req(4); |
62001a362ce9
6827605: new String intrinsics may prevent EA scalar replacement
kvn
parents:
851
diff
changeset
|
2321 break; |
62001a362ce9
6827605: new String intrinsics may prevent EA scalar replacement
kvn
parents:
851
diff
changeset
|
2322 } |
7637
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7196
diff
changeset
|
2323 case Op_EncodeISOArray: { |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7196
diff
changeset
|
2324 // Restructure into a binary tree for Matching. |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7196
diff
changeset
|
2325 Node* pair = new (C) BinaryNode(n->in(3), n->in(4)); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7196
diff
changeset
|
2326 n->set_req(3, pair); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7196
diff
changeset
|
2327 n->del_req(4); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7196
diff
changeset
|
2328 break; |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7196
diff
changeset
|
2329 } |
0 | 2330 default: |
2331 break; | |
2332 } | |
2333 } | |
2334 else { | |
2335 ShouldNotReachHere(); | |
2336 } | |
2337 } // end of while (mstack.is_nonempty()) | |
2338 } | |
2339 | |
2340 #ifdef ASSERT | |
2341 // machine-independent root to machine-dependent root | |
2342 void Matcher::dump_old2new_map() { | |
2343 _old2new_map.dump(); | |
2344 } | |
2345 #endif | |
2346 | |
2347 //---------------------------collect_null_checks------------------------------- | |
2348 // Find null checks in the ideal graph; write a machine-specific node for | |
2349 // it. Used by later implicit-null-check handling. Actually collects | |
2350 // either an IfTrue or IfFalse for the common NOT-null path, AND the ideal | |
2351 // value being tested. | |
368
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2352 void Matcher::collect_null_checks( Node *proj, Node *orig_proj ) { |
0 | 2353 Node *iff = proj->in(0); |
2354 if( iff->Opcode() == Op_If ) { | |
2355 // During matching If's have Bool & Cmp side-by-side | |
2356 BoolNode *b = iff->in(1)->as_Bool(); | |
2357 Node *cmp = iff->in(2); | |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
63
diff
changeset
|
2358 int opc = cmp->Opcode(); |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
63
diff
changeset
|
2359 if (opc != Op_CmpP && opc != Op_CmpN) return; |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
63
diff
changeset
|
2360 |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
63
diff
changeset
|
2361 const Type* ct = cmp->in(2)->bottom_type(); |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
63
diff
changeset
|
2362 if (ct == TypePtr::NULL_PTR || |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
63
diff
changeset
|
2363 (opc == Op_CmpN && ct == TypeNarrowOop::NULL_PTR)) { |
0 | 2364 |
368
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2365 bool push_it = false; |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
63
diff
changeset
|
2366 if( proj->Opcode() == Op_IfTrue ) { |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
63
diff
changeset
|
2367 extern int all_null_checks_found; |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
63
diff
changeset
|
2368 all_null_checks_found++; |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
63
diff
changeset
|
2369 if( b->_test._test == BoolTest::ne ) { |
368
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2370 push_it = true; |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
63
diff
changeset
|
2371 } |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
63
diff
changeset
|
2372 } else { |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
63
diff
changeset
|
2373 assert( proj->Opcode() == Op_IfFalse, "" ); |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
63
diff
changeset
|
2374 if( b->_test._test == BoolTest::eq ) { |
368
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2375 push_it = true; |
0 | 2376 } |
2377 } | |
368
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2378 if( push_it ) { |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2379 _null_check_tests.push(proj); |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2380 Node* val = cmp->in(1); |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2381 #ifdef _LP64 |
1575
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
kvn
parents:
1203
diff
changeset
|
2382 if (val->bottom_type()->isa_narrowoop() && |
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
kvn
parents:
1203
diff
changeset
|
2383 !Matcher::narrow_oop_use_complex_address()) { |
368
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2384 // |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2385 // Look for DecodeN node which should be pinned to orig_proj. |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2386 // On platforms (Sparc) which can not handle 2 adds |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2387 // in addressing mode we have to keep a DecodeN node and |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2388 // use it to do implicit NULL check in address. |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2389 // |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2390 // DecodeN node was pinned to non-null path (orig_proj) during |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2391 // CastPP transformation in final_graph_reshaping_impl(). |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2392 // |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2393 uint cnt = orig_proj->outcnt(); |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2394 for (uint i = 0; i < orig_proj->outcnt(); i++) { |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2395 Node* d = orig_proj->raw_out(i); |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2396 if (d->is_DecodeN() && d->in(1) == val) { |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2397 val = d; |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2398 val->set_req(0, NULL); // Unpin now. |
1575
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
kvn
parents:
1203
diff
changeset
|
2399 // Mark this as special case to distinguish from |
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
kvn
parents:
1203
diff
changeset
|
2400 // a regular case: CmpP(DecodeN, NULL). |
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
kvn
parents:
1203
diff
changeset
|
2401 val = (Node*)(((intptr_t)val) | 1); |
368
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2402 break; |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2403 } |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2404 } |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2405 } |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2406 #endif |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2407 _null_check_tests.push(val); |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2408 } |
0 | 2409 } |
2410 } | |
2411 } | |
2412 | |
2413 //---------------------------validate_null_checks------------------------------ | |
2414 // Its possible that the value being NULL checked is not the root of a match | |
2415 // tree. If so, I cannot use the value in an implicit null check. | |
2416 void Matcher::validate_null_checks( ) { | |
2417 uint cnt = _null_check_tests.size(); | |
2418 for( uint i=0; i < cnt; i+=2 ) { | |
2419 Node *test = _null_check_tests[i]; | |
2420 Node *val = _null_check_tests[i+1]; | |
1575
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
kvn
parents:
1203
diff
changeset
|
2421 bool is_decoden = ((intptr_t)val) & 1; |
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
kvn
parents:
1203
diff
changeset
|
2422 val = (Node*)(((intptr_t)val) & ~1); |
0 | 2423 if (has_new_node(val)) { |
1575
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
kvn
parents:
1203
diff
changeset
|
2424 Node* new_val = new_node(val); |
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
kvn
parents:
1203
diff
changeset
|
2425 if (is_decoden) { |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6804
diff
changeset
|
2426 assert(val->is_DecodeNarrowPtr() && val->in(0) == NULL, "sanity"); |
1575
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
kvn
parents:
1203
diff
changeset
|
2427 // Note: new_val may have a control edge if |
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
kvn
parents:
1203
diff
changeset
|
2428 // the original ideal node DecodeN was matched before |
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
kvn
parents:
1203
diff
changeset
|
2429 // it was unpinned in Matcher::collect_null_checks(). |
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
kvn
parents:
1203
diff
changeset
|
2430 // Unpin the mach node and mark it. |
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
kvn
parents:
1203
diff
changeset
|
2431 new_val->set_req(0, NULL); |
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
kvn
parents:
1203
diff
changeset
|
2432 new_val = (Node*)(((intptr_t)new_val) | 1); |
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
kvn
parents:
1203
diff
changeset
|
2433 } |
0 | 2434 // Is a match-tree root, so replace with the matched value |
1575
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
kvn
parents:
1203
diff
changeset
|
2435 _null_check_tests.map(i+1, new_val); |
0 | 2436 } else { |
2437 // Yank from candidate list | |
2438 _null_check_tests.map(i+1,_null_check_tests[--cnt]); | |
2439 _null_check_tests.map(i,_null_check_tests[--cnt]); | |
2440 _null_check_tests.pop(); | |
2441 _null_check_tests.pop(); | |
2442 i-=2; | |
2443 } | |
2444 } | |
2445 } | |
2446 | |
2447 // Used by the DFA in dfa_xxx.cpp. Check for a following barrier or | |
2448 // atomic instruction acting as a store_load barrier without any | |
2449 // intervening volatile load, and thus we don't need a barrier here. | |
2450 // We retain the Node to act as a compiler ordering barrier. | |
11164
fcf521c3fbc6
8007898: Incorrect optimization of Memory Barriers in Matcher::post_store_load_barrier()
kvn
parents:
11003
diff
changeset
|
2451 bool Matcher::post_store_load_barrier(const Node* vmb) { |
fcf521c3fbc6
8007898: Incorrect optimization of Memory Barriers in Matcher::post_store_load_barrier()
kvn
parents:
11003
diff
changeset
|
2452 Compile* C = Compile::current(); |
fcf521c3fbc6
8007898: Incorrect optimization of Memory Barriers in Matcher::post_store_load_barrier()
kvn
parents:
11003
diff
changeset
|
2453 assert(vmb->is_MemBar(), ""); |
14439
50fdb38839eb
8028515: PPPC64 (part 113.2): opto: Introduce LoadFence/StoreFence.
goetz
parents:
14435
diff
changeset
|
2454 assert(vmb->Opcode() != Op_MemBarAcquire && vmb->Opcode() != Op_LoadFence, ""); |
11164
fcf521c3fbc6
8007898: Incorrect optimization of Memory Barriers in Matcher::post_store_load_barrier()
kvn
parents:
11003
diff
changeset
|
2455 const MemBarNode* membar = vmb->as_MemBar(); |
0 | 2456 |
11164
fcf521c3fbc6
8007898: Incorrect optimization of Memory Barriers in Matcher::post_store_load_barrier()
kvn
parents:
11003
diff
changeset
|
2457 // Get the Ideal Proj node, ctrl, that can be used to iterate forward |
fcf521c3fbc6
8007898: Incorrect optimization of Memory Barriers in Matcher::post_store_load_barrier()
kvn
parents:
11003
diff
changeset
|
2458 Node* ctrl = NULL; |
fcf521c3fbc6
8007898: Incorrect optimization of Memory Barriers in Matcher::post_store_load_barrier()
kvn
parents:
11003
diff
changeset
|
2459 for (DUIterator_Fast imax, i = membar->fast_outs(imax); i < imax; i++) { |
fcf521c3fbc6
8007898: Incorrect optimization of Memory Barriers in Matcher::post_store_load_barrier()
kvn
parents:
11003
diff
changeset
|
2460 Node* p = membar->fast_out(i); |
fcf521c3fbc6
8007898: Incorrect optimization of Memory Barriers in Matcher::post_store_load_barrier()
kvn
parents:
11003
diff
changeset
|
2461 assert(p->is_Proj(), "only projections here"); |
fcf521c3fbc6
8007898: Incorrect optimization of Memory Barriers in Matcher::post_store_load_barrier()
kvn
parents:
11003
diff
changeset
|
2462 if ((p->as_Proj()->_con == TypeFunc::Control) && |
fcf521c3fbc6
8007898: Incorrect optimization of Memory Barriers in Matcher::post_store_load_barrier()
kvn
parents:
11003
diff
changeset
|
2463 !C->node_arena()->contains(p)) { // Unmatched old-space only |
fcf521c3fbc6
8007898: Incorrect optimization of Memory Barriers in Matcher::post_store_load_barrier()
kvn
parents:
11003
diff
changeset
|
2464 ctrl = p; |
0 | 2465 break; |
11164
fcf521c3fbc6
8007898: Incorrect optimization of Memory Barriers in Matcher::post_store_load_barrier()
kvn
parents:
11003
diff
changeset
|
2466 } |
0 | 2467 } |
11164
fcf521c3fbc6
8007898: Incorrect optimization of Memory Barriers in Matcher::post_store_load_barrier()
kvn
parents:
11003
diff
changeset
|
2468 assert((ctrl != NULL), "missing control projection"); |
0 | 2469 |
11164
fcf521c3fbc6
8007898: Incorrect optimization of Memory Barriers in Matcher::post_store_load_barrier()
kvn
parents:
11003
diff
changeset
|
2470 for (DUIterator_Fast jmax, j = ctrl->fast_outs(jmax); j < jmax; j++) { |
0 | 2471 Node *x = ctrl->fast_out(j); |
2472 int xop = x->Opcode(); | |
2473 | |
2474 // We don't need current barrier if we see another or a lock | |
2475 // before seeing volatile load. | |
2476 // | |
2477 // Op_Fastunlock previously appeared in the Op_* list below. | |
2478 // With the advent of 1-0 lock operations we're no longer guaranteed | |
2479 // that a monitor exit operation contains a serializing instruction. | |
2480 | |
2481 if (xop == Op_MemBarVolatile || | |
2482 xop == Op_CompareAndSwapL || | |
2483 xop == Op_CompareAndSwapP || | |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
63
diff
changeset
|
2484 xop == Op_CompareAndSwapN || |
11164
fcf521c3fbc6
8007898: Incorrect optimization of Memory Barriers in Matcher::post_store_load_barrier()
kvn
parents:
11003
diff
changeset
|
2485 xop == Op_CompareAndSwapI) { |
0 | 2486 return true; |
11164
fcf521c3fbc6
8007898: Incorrect optimization of Memory Barriers in Matcher::post_store_load_barrier()
kvn
parents:
11003
diff
changeset
|
2487 } |
fcf521c3fbc6
8007898: Incorrect optimization of Memory Barriers in Matcher::post_store_load_barrier()
kvn
parents:
11003
diff
changeset
|
2488 |
fcf521c3fbc6
8007898: Incorrect optimization of Memory Barriers in Matcher::post_store_load_barrier()
kvn
parents:
11003
diff
changeset
|
2489 // Op_FastLock previously appeared in the Op_* list above. |
fcf521c3fbc6
8007898: Incorrect optimization of Memory Barriers in Matcher::post_store_load_barrier()
kvn
parents:
11003
diff
changeset
|
2490 // With biased locking we're no longer guaranteed that a monitor |
fcf521c3fbc6
8007898: Incorrect optimization of Memory Barriers in Matcher::post_store_load_barrier()
kvn
parents:
11003
diff
changeset
|
2491 // enter operation contains a serializing instruction. |
fcf521c3fbc6
8007898: Incorrect optimization of Memory Barriers in Matcher::post_store_load_barrier()
kvn
parents:
11003
diff
changeset
|
2492 if ((xop == Op_FastLock) && !UseBiasedLocking) { |
fcf521c3fbc6
8007898: Incorrect optimization of Memory Barriers in Matcher::post_store_load_barrier()
kvn
parents:
11003
diff
changeset
|
2493 return true; |
fcf521c3fbc6
8007898: Incorrect optimization of Memory Barriers in Matcher::post_store_load_barrier()
kvn
parents:
11003
diff
changeset
|
2494 } |
0 | 2495 |
2496 if (x->is_MemBar()) { | |
2497 // We must retain this membar if there is an upcoming volatile | |
11164
fcf521c3fbc6
8007898: Incorrect optimization of Memory Barriers in Matcher::post_store_load_barrier()
kvn
parents:
11003
diff
changeset
|
2498 // load, which will be followed by acquire membar. |
14439
50fdb38839eb
8028515: PPPC64 (part 113.2): opto: Introduce LoadFence/StoreFence.
goetz
parents:
14435
diff
changeset
|
2499 if (xop == Op_MemBarAcquire || xop == Op_LoadFence) { |
0 | 2500 return false; |
11164
fcf521c3fbc6
8007898: Incorrect optimization of Memory Barriers in Matcher::post_store_load_barrier()
kvn
parents:
11003
diff
changeset
|
2501 } else { |
fcf521c3fbc6
8007898: Incorrect optimization of Memory Barriers in Matcher::post_store_load_barrier()
kvn
parents:
11003
diff
changeset
|
2502 // For other kinds of barriers, check by pretending we |
fcf521c3fbc6
8007898: Incorrect optimization of Memory Barriers in Matcher::post_store_load_barrier()
kvn
parents:
11003
diff
changeset
|
2503 // are them, and seeing if we can be removed. |
fcf521c3fbc6
8007898: Incorrect optimization of Memory Barriers in Matcher::post_store_load_barrier()
kvn
parents:
11003
diff
changeset
|
2504 return post_store_load_barrier(x->as_MemBar()); |
fcf521c3fbc6
8007898: Incorrect optimization of Memory Barriers in Matcher::post_store_load_barrier()
kvn
parents:
11003
diff
changeset
|
2505 } |
0 | 2506 } |
2507 | |
11164
fcf521c3fbc6
8007898: Incorrect optimization of Memory Barriers in Matcher::post_store_load_barrier()
kvn
parents:
11003
diff
changeset
|
2508 // probably not necessary to check for these |
fcf521c3fbc6
8007898: Incorrect optimization of Memory Barriers in Matcher::post_store_load_barrier()
kvn
parents:
11003
diff
changeset
|
2509 if (x->is_Call() || x->is_SafePoint() || x->is_block_proj()) { |
fcf521c3fbc6
8007898: Incorrect optimization of Memory Barriers in Matcher::post_store_load_barrier()
kvn
parents:
11003
diff
changeset
|
2510 return false; |
0 | 2511 } |
2512 } | |
2513 return false; | |
2514 } | |
2515 | |
14440
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2516 // Check whether node n is a branch to an uncommon trap that we could |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2517 // optimize as test with very high branch costs in case of going to |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2518 // the uncommon trap. The code must be able to be recompiled to use |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2519 // a cheaper test. |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2520 bool Matcher::branches_to_uncommon_trap(const Node *n) { |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2521 // Don't do it for natives, adapters, or runtime stubs |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2522 Compile *C = Compile::current(); |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2523 if (!C->is_method_compilation()) return false; |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2524 |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2525 assert(n->is_If(), "You should only call this on if nodes."); |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2526 IfNode *ifn = n->as_If(); |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2527 |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2528 Node *ifFalse = NULL; |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2529 for (DUIterator_Fast imax, i = ifn->fast_outs(imax); i < imax; i++) { |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2530 if (ifn->fast_out(i)->is_IfFalse()) { |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2531 ifFalse = ifn->fast_out(i); |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2532 break; |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2533 } |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2534 } |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2535 assert(ifFalse, "An If should have an ifFalse. Graph is broken."); |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2536 |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2537 Node *reg = ifFalse; |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2538 int cnt = 4; // We must protect against cycles. Limit to 4 iterations. |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2539 // Alternatively use visited set? Seems too expensive. |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2540 while (reg != NULL && cnt > 0) { |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2541 CallNode *call = NULL; |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2542 RegionNode *nxt_reg = NULL; |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2543 for (DUIterator_Fast imax, i = reg->fast_outs(imax); i < imax; i++) { |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2544 Node *o = reg->fast_out(i); |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2545 if (o->is_Call()) { |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2546 call = o->as_Call(); |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2547 } |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2548 if (o->is_Region()) { |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2549 nxt_reg = o->as_Region(); |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2550 } |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2551 } |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2552 |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2553 if (call && |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2554 call->entry_point() == SharedRuntime::uncommon_trap_blob()->entry_point()) { |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2555 const Type* trtype = call->in(TypeFunc::Parms)->bottom_type(); |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2556 if (trtype->isa_int() && trtype->is_int()->is_con()) { |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2557 jint tr_con = trtype->is_int()->get_con(); |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2558 Deoptimization::DeoptReason reason = Deoptimization::trap_request_reason(tr_con); |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2559 Deoptimization::DeoptAction action = Deoptimization::trap_request_action(tr_con); |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2560 assert((int)reason < (int)BitsPerInt, "recode bit map"); |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2561 |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2562 if (is_set_nth_bit(C->allowed_deopt_reasons(), (int)reason) |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2563 && action != Deoptimization::Action_none) { |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2564 // This uncommon trap is sure to recompile, eventually. |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2565 // When that happens, C->too_many_traps will prevent |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2566 // this transformation from happening again. |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2567 return true; |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2568 } |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2569 } |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2570 } |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2571 |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2572 reg = nxt_reg; |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2573 cnt--; |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2574 } |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2575 |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2576 return false; |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2577 } |
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
goetz
parents:
14439
diff
changeset
|
2578 |
0 | 2579 //============================================================================= |
2580 //---------------------------State--------------------------------------------- | |
2581 State::State(void) { | |
2582 #ifdef ASSERT | |
2583 _id = 0; | |
2584 _kids[0] = _kids[1] = (State*)(intptr_t) CONST64(0xcafebabecafebabe); | |
2585 _leaf = (Node*)(intptr_t) CONST64(0xbaadf00dbaadf00d); | |
2586 //memset(_cost, -1, sizeof(_cost)); | |
2587 //memset(_rule, -1, sizeof(_rule)); | |
2588 #endif | |
2589 memset(_valid, 0, sizeof(_valid)); | |
2590 } | |
2591 | |
2592 #ifdef ASSERT | |
2593 State::~State() { | |
2594 _id = 99; | |
2595 _kids[0] = _kids[1] = (State*)(intptr_t) CONST64(0xcafebabecafebabe); | |
2596 _leaf = (Node*)(intptr_t) CONST64(0xbaadf00dbaadf00d); | |
2597 memset(_cost, -3, sizeof(_cost)); | |
2598 memset(_rule, -3, sizeof(_rule)); | |
2599 } | |
2600 #endif | |
2601 | |
2602 #ifndef PRODUCT | |
2603 //---------------------------dump---------------------------------------------- | |
2604 void State::dump() { | |
2605 tty->print("\n"); | |
2606 dump(0); | |
2607 } | |
2608 | |
2609 void State::dump(int depth) { | |
2610 for( int j = 0; j < depth; j++ ) | |
2611 tty->print(" "); | |
2612 tty->print("--N: "); | |
2613 _leaf->dump(); | |
2614 uint i; | |
2615 for( i = 0; i < _LAST_MACH_OPER; i++ ) | |
2616 // Check for valid entry | |
2617 if( valid(i) ) { | |
2618 for( int j = 0; j < depth; j++ ) | |
2619 tty->print(" "); | |
2620 assert(_cost[i] != max_juint, "cost must be a valid value"); | |
2621 assert(_rule[i] < _last_Mach_Node, "rule[i] must be valid rule"); | |
2622 tty->print_cr("%s %d %s", | |
2623 ruleName[i], _cost[i], ruleName[_rule[i]] ); | |
2624 } | |
2625 tty->print_cr(""); | |
2626 | |
2627 for( i=0; i<2; i++ ) | |
2628 if( _kids[i] ) | |
2629 _kids[i]->dump(depth+1); | |
2630 } | |
2631 #endif |