| File: | jdk/src/hotspot/share/opto/matcher.cpp |
| Warning: | line 1046, column 7 Value stored to 'mat' is never read |
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| 1 | /* |
| 2 | * Copyright (c) 1997, 2021, Oracle and/or its affiliates. All rights reserved. |
| 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 | * |
| 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| 20 | * or visit www.oracle.com if you need additional information or have any |
| 21 | * questions. |
| 22 | * |
| 23 | */ |
| 24 | |
| 25 | #include "precompiled.hpp" |
| 26 | #include "gc/shared/barrierSet.hpp" |
| 27 | #include "gc/shared/c2/barrierSetC2.hpp" |
| 28 | #include "memory/allocation.inline.hpp" |
| 29 | #include "memory/resourceArea.hpp" |
| 30 | #include "oops/compressedOops.hpp" |
| 31 | #include "opto/ad.hpp" |
| 32 | #include "opto/addnode.hpp" |
| 33 | #include "opto/callnode.hpp" |
| 34 | #include "opto/idealGraphPrinter.hpp" |
| 35 | #include "opto/matcher.hpp" |
| 36 | #include "opto/memnode.hpp" |
| 37 | #include "opto/movenode.hpp" |
| 38 | #include "opto/opcodes.hpp" |
| 39 | #include "opto/regmask.hpp" |
| 40 | #include "opto/rootnode.hpp" |
| 41 | #include "opto/runtime.hpp" |
| 42 | #include "opto/type.hpp" |
| 43 | #include "opto/vectornode.hpp" |
| 44 | #include "runtime/os.hpp" |
| 45 | #include "runtime/sharedRuntime.hpp" |
| 46 | #include "utilities/align.hpp" |
| 47 | |
| 48 | OptoReg::Name OptoReg::c_frame_pointer; |
| 49 | |
| 50 | const RegMask *Matcher::idealreg2regmask[_last_machine_leaf]; |
| 51 | RegMask Matcher::mreg2regmask[_last_Mach_Reg]; |
| 52 | RegMask Matcher::caller_save_regmask; |
| 53 | RegMask Matcher::caller_save_regmask_exclude_soe; |
| 54 | RegMask Matcher::mh_caller_save_regmask; |
| 55 | RegMask Matcher::mh_caller_save_regmask_exclude_soe; |
| 56 | RegMask Matcher::STACK_ONLY_mask; |
| 57 | RegMask Matcher::c_frame_ptr_mask; |
| 58 | const uint Matcher::_begin_rematerialize = _BEGIN_REMATERIALIZE; |
| 59 | const uint Matcher::_end_rematerialize = _END_REMATERIALIZE; |
| 60 | |
| 61 | //---------------------------Matcher------------------------------------------- |
| 62 | Matcher::Matcher() |
| 63 | : PhaseTransform( Phase::Ins_Select ), |
| 64 | _states_arena(Chunk::medium_size, mtCompiler), |
| 65 | _visited(&_states_arena), |
| 66 | _shared(&_states_arena), |
| 67 | _dontcare(&_states_arena), |
| 68 | _reduceOp(reduceOp), _leftOp(leftOp), _rightOp(rightOp), |
| 69 | _swallowed(swallowed), |
| 70 | _begin_inst_chain_rule(_BEGIN_INST_CHAIN_RULE), |
| 71 | _end_inst_chain_rule(_END_INST_CHAIN_RULE), |
| 72 | _must_clone(must_clone), |
| 73 | _shared_nodes(C->comp_arena()), |
| 74 | #ifndef PRODUCT |
| 75 | _old2new_map(C->comp_arena()), |
| 76 | _new2old_map(C->comp_arena()), |
| 77 | _reused(C->comp_arena()), |
| 78 | #endif // !PRODUCT |
| 79 | _allocation_started(false), |
| 80 | _ruleName(ruleName), |
| 81 | _register_save_policy(register_save_policy), |
| 82 | _c_reg_save_policy(c_reg_save_policy), |
| 83 | _register_save_type(register_save_type) { |
| 84 | C->set_matcher(this); |
| 85 | |
| 86 | idealreg2spillmask [Op_RegI] = NULL__null; |
| 87 | idealreg2spillmask [Op_RegN] = NULL__null; |
| 88 | idealreg2spillmask [Op_RegL] = NULL__null; |
| 89 | idealreg2spillmask [Op_RegF] = NULL__null; |
| 90 | idealreg2spillmask [Op_RegD] = NULL__null; |
| 91 | idealreg2spillmask [Op_RegP] = NULL__null; |
| 92 | idealreg2spillmask [Op_VecA] = NULL__null; |
| 93 | idealreg2spillmask [Op_VecS] = NULL__null; |
| 94 | idealreg2spillmask [Op_VecD] = NULL__null; |
| 95 | idealreg2spillmask [Op_VecX] = NULL__null; |
| 96 | idealreg2spillmask [Op_VecY] = NULL__null; |
| 97 | idealreg2spillmask [Op_VecZ] = NULL__null; |
| 98 | idealreg2spillmask [Op_RegFlags] = NULL__null; |
| 99 | idealreg2spillmask [Op_RegVectMask] = NULL__null; |
| 100 | |
| 101 | idealreg2debugmask [Op_RegI] = NULL__null; |
| 102 | idealreg2debugmask [Op_RegN] = NULL__null; |
| 103 | idealreg2debugmask [Op_RegL] = NULL__null; |
| 104 | idealreg2debugmask [Op_RegF] = NULL__null; |
| 105 | idealreg2debugmask [Op_RegD] = NULL__null; |
| 106 | idealreg2debugmask [Op_RegP] = NULL__null; |
| 107 | idealreg2debugmask [Op_VecA] = NULL__null; |
| 108 | idealreg2debugmask [Op_VecS] = NULL__null; |
| 109 | idealreg2debugmask [Op_VecD] = NULL__null; |
| 110 | idealreg2debugmask [Op_VecX] = NULL__null; |
| 111 | idealreg2debugmask [Op_VecY] = NULL__null; |
| 112 | idealreg2debugmask [Op_VecZ] = NULL__null; |
| 113 | idealreg2debugmask [Op_RegFlags] = NULL__null; |
| 114 | idealreg2debugmask [Op_RegVectMask] = NULL__null; |
| 115 | |
| 116 | idealreg2mhdebugmask[Op_RegI] = NULL__null; |
| 117 | idealreg2mhdebugmask[Op_RegN] = NULL__null; |
| 118 | idealreg2mhdebugmask[Op_RegL] = NULL__null; |
| 119 | idealreg2mhdebugmask[Op_RegF] = NULL__null; |
| 120 | idealreg2mhdebugmask[Op_RegD] = NULL__null; |
| 121 | idealreg2mhdebugmask[Op_RegP] = NULL__null; |
| 122 | idealreg2mhdebugmask[Op_VecA] = NULL__null; |
| 123 | idealreg2mhdebugmask[Op_VecS] = NULL__null; |
| 124 | idealreg2mhdebugmask[Op_VecD] = NULL__null; |
| 125 | idealreg2mhdebugmask[Op_VecX] = NULL__null; |
| 126 | idealreg2mhdebugmask[Op_VecY] = NULL__null; |
| 127 | idealreg2mhdebugmask[Op_VecZ] = NULL__null; |
| 128 | idealreg2mhdebugmask[Op_RegFlags] = NULL__null; |
| 129 | idealreg2mhdebugmask[Op_RegVectMask] = NULL__null; |
| 130 | |
| 131 | debug_only(_mem_node = NULL;)_mem_node = __null; // Ideal memory node consumed by mach node |
| 132 | } |
| 133 | |
| 134 | //------------------------------warp_incoming_stk_arg------------------------ |
| 135 | // This warps a VMReg into an OptoReg::Name |
| 136 | OptoReg::Name Matcher::warp_incoming_stk_arg( VMReg reg ) { |
| 137 | OptoReg::Name warped; |
| 138 | if( reg->is_stack() ) { // Stack slot argument? |
| 139 | warped = OptoReg::add(_old_SP, reg->reg2stack() ); |
| 140 | warped = OptoReg::add(warped, C->out_preserve_stack_slots()); |
| 141 | if( warped >= _in_arg_limit ) |
| 142 | _in_arg_limit = OptoReg::add(warped, 1); // Bump max stack slot seen |
| 143 | if (!RegMask::can_represent_arg(warped)) { |
| 144 | // the compiler cannot represent this method's calling sequence |
| 145 | C->record_method_not_compilable("unsupported incoming calling sequence"); |
| 146 | return OptoReg::Bad; |
| 147 | } |
| 148 | return warped; |
| 149 | } |
| 150 | return OptoReg::as_OptoReg(reg); |
| 151 | } |
| 152 | |
| 153 | //---------------------------compute_old_SP------------------------------------ |
| 154 | OptoReg::Name Compile::compute_old_SP() { |
| 155 | int fixed = fixed_slots(); |
| 156 | int preserve = in_preserve_stack_slots(); |
| 157 | return OptoReg::stack2reg(align_up(fixed + preserve, (int)Matcher::stack_alignment_in_slots())); |
| 158 | } |
| 159 | |
| 160 | |
| 161 | |
| 162 | #ifdef ASSERT1 |
| 163 | void Matcher::verify_new_nodes_only(Node* xroot) { |
| 164 | // Make sure that the new graph only references new nodes |
| 165 | ResourceMark rm; |
| 166 | Unique_Node_List worklist; |
| 167 | VectorSet visited; |
| 168 | worklist.push(xroot); |
| 169 | while (worklist.size() > 0) { |
| 170 | Node* n = worklist.pop(); |
| 171 | visited.set(n->_idx); |
| 172 | assert(C->node_arena()->contains(n), "dead node")do { if (!(C->node_arena()->contains(n))) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 172, "assert(" "C->node_arena()->contains(n)" ") failed" , "dead node"); ::breakpoint(); } } while (0); |
| 173 | for (uint j = 0; j < n->req(); j++) { |
| 174 | Node* in = n->in(j); |
| 175 | if (in != NULL__null) { |
| 176 | assert(C->node_arena()->contains(in), "dead node")do { if (!(C->node_arena()->contains(in))) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 176, "assert(" "C->node_arena()->contains(in)" ") failed" , "dead node"); ::breakpoint(); } } while (0); |
| 177 | if (!visited.test(in->_idx)) { |
| 178 | worklist.push(in); |
| 179 | } |
| 180 | } |
| 181 | } |
| 182 | } |
| 183 | } |
| 184 | #endif |
| 185 | |
| 186 | |
| 187 | //---------------------------match--------------------------------------------- |
| 188 | void Matcher::match( ) { |
| 189 | if( MaxLabelRootDepth < 100 ) { // Too small? |
| 190 | assert(false, "invalid MaxLabelRootDepth, increase it to 100 minimum")do { if (!(false)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 190, "assert(" "false" ") failed", "invalid MaxLabelRootDepth, increase it to 100 minimum" ); ::breakpoint(); } } while (0); |
| 191 | MaxLabelRootDepth = 100; |
| 192 | } |
| 193 | // One-time initialization of some register masks. |
| 194 | init_spill_mask( C->root()->in(1) ); |
| 195 | _return_addr_mask = return_addr(); |
| 196 | #ifdef _LP641 |
| 197 | // Pointers take 2 slots in 64-bit land |
| 198 | _return_addr_mask.Insert(OptoReg::add(return_addr(),1)); |
| 199 | #endif |
| 200 | |
| 201 | // Map a Java-signature return type into return register-value |
| 202 | // machine registers for 0, 1 and 2 returned values. |
| 203 | const TypeTuple *range = C->tf()->range(); |
| 204 | if( range->cnt() > TypeFunc::Parms ) { // If not a void function |
| 205 | // Get ideal-register return type |
| 206 | uint ireg = range->field_at(TypeFunc::Parms)->ideal_reg(); |
| 207 | // Get machine return register |
| 208 | uint sop = C->start()->Opcode(); |
| 209 | OptoRegPair regs = return_value(ireg); |
| 210 | |
| 211 | // And mask for same |
| 212 | _return_value_mask = RegMask(regs.first()); |
| 213 | if( OptoReg::is_valid(regs.second()) ) |
| 214 | _return_value_mask.Insert(regs.second()); |
| 215 | } |
| 216 | |
| 217 | // --------------- |
| 218 | // Frame Layout |
| 219 | |
| 220 | // Need the method signature to determine the incoming argument types, |
| 221 | // because the types determine which registers the incoming arguments are |
| 222 | // in, and this affects the matched code. |
| 223 | const TypeTuple *domain = C->tf()->domain(); |
| 224 | uint argcnt = domain->cnt() - TypeFunc::Parms; |
| 225 | BasicType *sig_bt = NEW_RESOURCE_ARRAY( BasicType, argcnt )(BasicType*) resource_allocate_bytes((argcnt) * sizeof(BasicType )); |
| 226 | VMRegPair *vm_parm_regs = NEW_RESOURCE_ARRAY( VMRegPair, argcnt )(VMRegPair*) resource_allocate_bytes((argcnt) * sizeof(VMRegPair )); |
| 227 | _parm_regs = NEW_RESOURCE_ARRAY( OptoRegPair, argcnt )(OptoRegPair*) resource_allocate_bytes((argcnt) * sizeof(OptoRegPair )); |
| 228 | _calling_convention_mask = NEW_RESOURCE_ARRAY( RegMask, argcnt )(RegMask*) resource_allocate_bytes((argcnt) * sizeof(RegMask) ); |
| 229 | uint i; |
| 230 | for( i = 0; i<argcnt; i++ ) { |
| 231 | sig_bt[i] = domain->field_at(i+TypeFunc::Parms)->basic_type(); |
| 232 | } |
| 233 | |
| 234 | // Pass array of ideal registers and length to USER code (from the AD file) |
| 235 | // that will convert this to an array of register numbers. |
| 236 | const StartNode *start = C->start(); |
| 237 | start->calling_convention( sig_bt, vm_parm_regs, argcnt ); |
| 238 | #ifdef ASSERT1 |
| 239 | // Sanity check users' calling convention. Real handy while trying to |
| 240 | // get the initial port correct. |
| 241 | { for (uint i = 0; i<argcnt; i++) { |
| 242 | if( !vm_parm_regs[i].first()->is_valid() && !vm_parm_regs[i].second()->is_valid() ) { |
| 243 | assert(domain->field_at(i+TypeFunc::Parms)==Type::HALF, "only allowed on halve" )do { if (!(domain->field_at(i+TypeFunc::Parms)==Type::HALF )) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 243, "assert(" "domain->field_at(i+TypeFunc::Parms)==Type::HALF" ") failed", "only allowed on halve"); ::breakpoint(); } } while (0); |
| 244 | _parm_regs[i].set_bad(); |
| 245 | continue; |
| 246 | } |
| 247 | VMReg parm_reg = vm_parm_regs[i].first(); |
| 248 | assert(parm_reg->is_valid(), "invalid arg?")do { if (!(parm_reg->is_valid())) { (*g_assert_poison) = 'X' ;; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 248, "assert(" "parm_reg->is_valid()" ") failed", "invalid arg?" ); ::breakpoint(); } } while (0); |
| 249 | if (parm_reg->is_reg()) { |
| 250 | OptoReg::Name opto_parm_reg = OptoReg::as_OptoReg(parm_reg); |
| 251 | assert(can_be_java_arg(opto_parm_reg) ||do { if (!(can_be_java_arg(opto_parm_reg) || C->stub_function () == ((address)((address_word)(OptoRuntime::rethrow_C))) || opto_parm_reg == inline_cache_reg())) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 254, "assert(" "can_be_java_arg(opto_parm_reg) || C->stub_function() == ((address)((address_word)(OptoRuntime::rethrow_C))) || opto_parm_reg == inline_cache_reg()" ") failed", "parameters in register must be preserved by runtime stubs" ); ::breakpoint(); } } while (0) |
| 252 | C->stub_function() == CAST_FROM_FN_PTR(address, OptoRuntime::rethrow_C) ||do { if (!(can_be_java_arg(opto_parm_reg) || C->stub_function () == ((address)((address_word)(OptoRuntime::rethrow_C))) || opto_parm_reg == inline_cache_reg())) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 254, "assert(" "can_be_java_arg(opto_parm_reg) || C->stub_function() == ((address)((address_word)(OptoRuntime::rethrow_C))) || opto_parm_reg == inline_cache_reg()" ") failed", "parameters in register must be preserved by runtime stubs" ); ::breakpoint(); } } while (0) |
| 253 | opto_parm_reg == inline_cache_reg(),do { if (!(can_be_java_arg(opto_parm_reg) || C->stub_function () == ((address)((address_word)(OptoRuntime::rethrow_C))) || opto_parm_reg == inline_cache_reg())) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 254, "assert(" "can_be_java_arg(opto_parm_reg) || C->stub_function() == ((address)((address_word)(OptoRuntime::rethrow_C))) || opto_parm_reg == inline_cache_reg()" ") failed", "parameters in register must be preserved by runtime stubs" ); ::breakpoint(); } } while (0) |
| 254 | "parameters in register must be preserved by runtime stubs")do { if (!(can_be_java_arg(opto_parm_reg) || C->stub_function () == ((address)((address_word)(OptoRuntime::rethrow_C))) || opto_parm_reg == inline_cache_reg())) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 254, "assert(" "can_be_java_arg(opto_parm_reg) || C->stub_function() == ((address)((address_word)(OptoRuntime::rethrow_C))) || opto_parm_reg == inline_cache_reg()" ") failed", "parameters in register must be preserved by runtime stubs" ); ::breakpoint(); } } while (0); |
| 255 | } |
| 256 | for (uint j = 0; j < i; j++) { |
| 257 | assert(parm_reg != vm_parm_regs[j].first(),do { if (!(parm_reg != vm_parm_regs[j].first())) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 258, "assert(" "parm_reg != vm_parm_regs[j].first()" ") failed" , "calling conv. must produce distinct regs"); ::breakpoint() ; } } while (0) |
| 258 | "calling conv. must produce distinct regs")do { if (!(parm_reg != vm_parm_regs[j].first())) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 258, "assert(" "parm_reg != vm_parm_regs[j].first()" ") failed" , "calling conv. must produce distinct regs"); ::breakpoint() ; } } while (0); |
| 259 | } |
| 260 | } |
| 261 | } |
| 262 | #endif |
| 263 | |
| 264 | // Do some initial frame layout. |
| 265 | |
| 266 | // Compute the old incoming SP (may be called FP) as |
| 267 | // OptoReg::stack0() + locks + in_preserve_stack_slots + pad2. |
| 268 | _old_SP = C->compute_old_SP(); |
| 269 | assert( is_even(_old_SP), "must be even" )do { if (!(is_even(_old_SP))) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 269, "assert(" "is_even(_old_SP)" ") failed", "must be even" ); ::breakpoint(); } } while (0); |
| 270 | |
| 271 | // Compute highest incoming stack argument as |
| 272 | // _old_SP + out_preserve_stack_slots + incoming argument size. |
| 273 | _in_arg_limit = OptoReg::add(_old_SP, C->out_preserve_stack_slots()); |
| 274 | assert( is_even(_in_arg_limit), "out_preserve must be even" )do { if (!(is_even(_in_arg_limit))) { (*g_assert_poison) = 'X' ;; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 274, "assert(" "is_even(_in_arg_limit)" ") failed", "out_preserve must be even" ); ::breakpoint(); } } while (0); |
| 275 | for( i = 0; i < argcnt; i++ ) { |
| 276 | // Permit args to have no register |
| 277 | _calling_convention_mask[i].Clear(); |
| 278 | if( !vm_parm_regs[i].first()->is_valid() && !vm_parm_regs[i].second()->is_valid() ) { |
| 279 | continue; |
| 280 | } |
| 281 | // calling_convention returns stack arguments as a count of |
| 282 | // slots beyond OptoReg::stack0()/VMRegImpl::stack0. We need to convert this to |
| 283 | // the allocators point of view, taking into account all the |
| 284 | // preserve area, locks & pad2. |
| 285 | |
| 286 | OptoReg::Name reg1 = warp_incoming_stk_arg(vm_parm_regs[i].first()); |
| 287 | if( OptoReg::is_valid(reg1)) |
| 288 | _calling_convention_mask[i].Insert(reg1); |
| 289 | |
| 290 | OptoReg::Name reg2 = warp_incoming_stk_arg(vm_parm_regs[i].second()); |
| 291 | if( OptoReg::is_valid(reg2)) |
| 292 | _calling_convention_mask[i].Insert(reg2); |
| 293 | |
| 294 | // Saved biased stack-slot register number |
| 295 | _parm_regs[i].set_pair(reg2, reg1); |
| 296 | } |
| 297 | |
| 298 | // Finally, make sure the incoming arguments take up an even number of |
| 299 | // words, in case the arguments or locals need to contain doubleword stack |
| 300 | // slots. The rest of the system assumes that stack slot pairs (in |
| 301 | // particular, in the spill area) which look aligned will in fact be |
| 302 | // aligned relative to the stack pointer in the target machine. Double |
| 303 | // stack slots will always be allocated aligned. |
| 304 | _new_SP = OptoReg::Name(align_up(_in_arg_limit, (int)RegMask::SlotsPerLong)); |
| 305 | |
| 306 | // Compute highest outgoing stack argument as |
| 307 | // _new_SP + out_preserve_stack_slots + max(outgoing argument size). |
| 308 | _out_arg_limit = OptoReg::add(_new_SP, C->out_preserve_stack_slots()); |
| 309 | assert( is_even(_out_arg_limit), "out_preserve must be even" )do { if (!(is_even(_out_arg_limit))) { (*g_assert_poison) = 'X' ;; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 309, "assert(" "is_even(_out_arg_limit)" ") failed", "out_preserve must be even" ); ::breakpoint(); } } while (0); |
| 310 | |
| 311 | if (!RegMask::can_represent_arg(OptoReg::add(_out_arg_limit,-1))) { |
| 312 | // the compiler cannot represent this method's calling sequence |
| 313 | C->record_method_not_compilable("must be able to represent all call arguments in reg mask"); |
| 314 | } |
| 315 | |
| 316 | if (C->failing()) return; // bailed out on incoming arg failure |
| 317 | |
| 318 | // --------------- |
| 319 | // Collect roots of matcher trees. Every node for which |
| 320 | // _shared[_idx] is cleared is guaranteed to not be shared, and thus |
| 321 | // can be a valid interior of some tree. |
| 322 | find_shared( C->root() ); |
| 323 | find_shared( C->top() ); |
| 324 | |
| 325 | C->print_method(PHASE_BEFORE_MATCHING); |
| 326 | |
| 327 | // Create new ideal node ConP #NULL even if it does exist in old space |
| 328 | // to avoid false sharing if the corresponding mach node is not used. |
| 329 | // The corresponding mach node is only used in rare cases for derived |
| 330 | // pointers. |
| 331 | Node* new_ideal_null = ConNode::make(TypePtr::NULL_PTR); |
| 332 | |
| 333 | // Swap out to old-space; emptying new-space |
| 334 | Arena *old = C->node_arena()->move_contents(C->old_arena()); |
| 335 | |
| 336 | // Save debug and profile information for nodes in old space: |
| 337 | _old_node_note_array = C->node_note_array(); |
| 338 | if (_old_node_note_array != NULL__null) { |
| 339 | C->set_node_note_array(new(C->comp_arena()) GrowableArray<Node_Notes*> |
| 340 | (C->comp_arena(), _old_node_note_array->length(), |
| 341 | 0, NULL__null)); |
| 342 | } |
| 343 | |
| 344 | // Pre-size the new_node table to avoid the need for range checks. |
| 345 | grow_new_node_array(C->unique()); |
| 346 | |
| 347 | // Reset node counter so MachNodes start with _idx at 0 |
| 348 | int live_nodes = C->live_nodes(); |
| 349 | C->set_unique(0); |
| 350 | C->reset_dead_node_list(); |
| 351 | |
| 352 | // Recursively match trees from old space into new space. |
| 353 | // Correct leaves of new-space Nodes; they point to old-space. |
| 354 | _visited.clear(); |
| 355 | C->set_cached_top_node(xform( C->top(), live_nodes )); |
| 356 | if (!C->failing()) { |
| 357 | Node* xroot = xform( C->root(), 1 ); |
| 358 | if (xroot == NULL__null) { |
| 359 | Matcher::soft_match_failure(); // recursive matching process failed |
| 360 | C->record_method_not_compilable("instruction match failed"); |
| 361 | } else { |
| 362 | // During matching shared constants were attached to C->root() |
| 363 | // because xroot wasn't available yet, so transfer the uses to |
| 364 | // the xroot. |
| 365 | for( DUIterator_Fast jmax, j = C->root()->fast_outs(jmax); j < jmax; j++ ) { |
| 366 | Node* n = C->root()->fast_out(j); |
| 367 | if (C->node_arena()->contains(n)) { |
| 368 | assert(n->in(0) == C->root(), "should be control user")do { if (!(n->in(0) == C->root())) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 368, "assert(" "n->in(0) == C->root()" ") failed", "should be control user" ); ::breakpoint(); } } while (0); |
| 369 | n->set_req(0, xroot); |
| 370 | --j; |
| 371 | --jmax; |
| 372 | } |
| 373 | } |
| 374 | |
| 375 | // Generate new mach node for ConP #NULL |
| 376 | assert(new_ideal_null != NULL, "sanity")do { if (!(new_ideal_null != __null)) { (*g_assert_poison) = 'X' ;; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 376, "assert(" "new_ideal_null != __null" ") failed", "sanity" ); ::breakpoint(); } } while (0); |
| 377 | _mach_null = match_tree(new_ideal_null); |
| 378 | // Don't set control, it will confuse GCM since there are no uses. |
| 379 | // The control will be set when this node is used first time |
| 380 | // in find_base_for_derived(). |
| 381 | assert(_mach_null != NULL, "")do { if (!(_mach_null != __null)) { (*g_assert_poison) = 'X'; ; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 381, "assert(" "_mach_null != __null" ") failed", ""); ::breakpoint (); } } while (0); |
| 382 | |
| 383 | C->set_root(xroot->is_Root() ? xroot->as_Root() : NULL__null); |
| 384 | |
| 385 | #ifdef ASSERT1 |
| 386 | verify_new_nodes_only(xroot); |
| 387 | #endif |
| 388 | } |
| 389 | } |
| 390 | if (C->top() == NULL__null || C->root() == NULL__null) { |
| 391 | C->record_method_not_compilable("graph lost"); // %%% cannot happen? |
| 392 | } |
| 393 | if (C->failing()) { |
| 394 | // delete old; |
| 395 | old->destruct_contents(); |
| 396 | return; |
| 397 | } |
| 398 | assert( C->top(), "" )do { if (!(C->top())) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 398, "assert(" "C->top()" ") failed", ""); ::breakpoint( ); } } while (0); |
| 399 | assert( C->root(), "" )do { if (!(C->root())) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 399, "assert(" "C->root()" ") failed", ""); ::breakpoint (); } } while (0); |
| 400 | validate_null_checks(); |
| 401 | |
| 402 | // Now smoke old-space |
| 403 | NOT_DEBUG( old->destruct_contents() ); |
| 404 | |
| 405 | // ------------------------ |
| 406 | // Set up save-on-entry registers. |
| 407 | Fixup_Save_On_Entry( ); |
| 408 | |
| 409 | { // Cleanup mach IR after selection phase is over. |
| 410 | Compile::TracePhase tp("postselect_cleanup", &timers[_t_postselect_cleanup]); |
| 411 | do_postselect_cleanup(); |
| 412 | if (C->failing()) return; |
| 413 | assert(verify_after_postselect_cleanup(), "")do { if (!(verify_after_postselect_cleanup())) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 413, "assert(" "verify_after_postselect_cleanup()" ") failed" , ""); ::breakpoint(); } } while (0); |
| 414 | } |
| 415 | } |
| 416 | |
| 417 | //------------------------------Fixup_Save_On_Entry---------------------------- |
| 418 | // The stated purpose of this routine is to take care of save-on-entry |
| 419 | // registers. However, the overall goal of the Match phase is to convert into |
| 420 | // machine-specific instructions which have RegMasks to guide allocation. |
| 421 | // So what this procedure really does is put a valid RegMask on each input |
| 422 | // to the machine-specific variations of all Return, TailCall and Halt |
| 423 | // instructions. It also adds edgs to define the save-on-entry values (and of |
| 424 | // course gives them a mask). |
| 425 | |
| 426 | static RegMask *init_input_masks( uint size, RegMask &ret_adr, RegMask &fp ) { |
| 427 | RegMask *rms = NEW_RESOURCE_ARRAY( RegMask, size )(RegMask*) resource_allocate_bytes((size) * sizeof(RegMask)); |
| 428 | // Do all the pre-defined register masks |
| 429 | rms[TypeFunc::Control ] = RegMask::Empty; |
| 430 | rms[TypeFunc::I_O ] = RegMask::Empty; |
| 431 | rms[TypeFunc::Memory ] = RegMask::Empty; |
| 432 | rms[TypeFunc::ReturnAdr] = ret_adr; |
| 433 | rms[TypeFunc::FramePtr ] = fp; |
| 434 | return rms; |
| 435 | } |
| 436 | |
| 437 | const int Matcher::scalable_predicate_reg_slots() { |
| 438 | assert(Matcher::has_predicated_vectors() && Matcher::supports_scalable_vector(),do { if (!(Matcher::has_predicated_vectors() && Matcher ::supports_scalable_vector())) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 439, "assert(" "Matcher::has_predicated_vectors() && Matcher::supports_scalable_vector()" ") failed", "scalable predicate vector should be supported") ; ::breakpoint(); } } while (0) |
| 439 | "scalable predicate vector should be supported")do { if (!(Matcher::has_predicated_vectors() && Matcher ::supports_scalable_vector())) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 439, "assert(" "Matcher::has_predicated_vectors() && Matcher::supports_scalable_vector()" ") failed", "scalable predicate vector should be supported") ; ::breakpoint(); } } while (0); |
| 440 | int vector_reg_bit_size = Matcher::scalable_vector_reg_size(T_BYTE) << LogBitsPerByte; |
| 441 | // We assume each predicate register is one-eighth of the size of |
| 442 | // scalable vector register, one mask bit per vector byte. |
| 443 | int predicate_reg_bit_size = vector_reg_bit_size >> 3; |
| 444 | // Compute number of slots which is required when scalable predicate |
| 445 | // register is spilled. E.g. if scalable vector register is 640 bits, |
| 446 | // predicate register is 80 bits, which is 2.5 * slots. |
| 447 | // We will round up the slot number to power of 2, which is required |
| 448 | // by find_first_set(). |
| 449 | int slots = predicate_reg_bit_size & (BitsPerInt - 1) |
| 450 | ? (predicate_reg_bit_size >> LogBitsPerInt) + 1 |
| 451 | : predicate_reg_bit_size >> LogBitsPerInt; |
| 452 | return round_up_power_of_2(slots); |
| 453 | } |
| 454 | |
| 455 | #define NOF_STACK_MASKS(3*13) (3*13) |
| 456 | |
| 457 | // Create the initial stack mask used by values spilling to the stack. |
| 458 | // Disallow any debug info in outgoing argument areas by setting the |
| 459 | // initial mask accordingly. |
| 460 | void Matcher::init_first_stack_mask() { |
| 461 | |
| 462 | // Allocate storage for spill masks as masks for the appropriate load type. |
| 463 | RegMask *rms = (RegMask*)C->comp_arena()->AmallocWords(sizeof(RegMask) * NOF_STACK_MASKS(3*13)); |
| 464 | |
| 465 | // Initialize empty placeholder masks into the newly allocated arena |
| 466 | for (int i = 0; i < NOF_STACK_MASKS(3*13); i++) { |
| 467 | new (rms + i) RegMask(); |
| 468 | } |
| 469 | |
| 470 | idealreg2spillmask [Op_RegN] = &rms[0]; |
| 471 | idealreg2spillmask [Op_RegI] = &rms[1]; |
| 472 | idealreg2spillmask [Op_RegL] = &rms[2]; |
| 473 | idealreg2spillmask [Op_RegF] = &rms[3]; |
| 474 | idealreg2spillmask [Op_RegD] = &rms[4]; |
| 475 | idealreg2spillmask [Op_RegP] = &rms[5]; |
| 476 | |
| 477 | idealreg2debugmask [Op_RegN] = &rms[6]; |
| 478 | idealreg2debugmask [Op_RegI] = &rms[7]; |
| 479 | idealreg2debugmask [Op_RegL] = &rms[8]; |
| 480 | idealreg2debugmask [Op_RegF] = &rms[9]; |
| 481 | idealreg2debugmask [Op_RegD] = &rms[10]; |
| 482 | idealreg2debugmask [Op_RegP] = &rms[11]; |
| 483 | |
| 484 | idealreg2mhdebugmask[Op_RegN] = &rms[12]; |
| 485 | idealreg2mhdebugmask[Op_RegI] = &rms[13]; |
| 486 | idealreg2mhdebugmask[Op_RegL] = &rms[14]; |
| 487 | idealreg2mhdebugmask[Op_RegF] = &rms[15]; |
| 488 | idealreg2mhdebugmask[Op_RegD] = &rms[16]; |
| 489 | idealreg2mhdebugmask[Op_RegP] = &rms[17]; |
| 490 | |
| 491 | idealreg2spillmask [Op_VecA] = &rms[18]; |
| 492 | idealreg2spillmask [Op_VecS] = &rms[19]; |
| 493 | idealreg2spillmask [Op_VecD] = &rms[20]; |
| 494 | idealreg2spillmask [Op_VecX] = &rms[21]; |
| 495 | idealreg2spillmask [Op_VecY] = &rms[22]; |
| 496 | idealreg2spillmask [Op_VecZ] = &rms[23]; |
| 497 | |
| 498 | idealreg2debugmask [Op_VecA] = &rms[24]; |
| 499 | idealreg2debugmask [Op_VecS] = &rms[25]; |
| 500 | idealreg2debugmask [Op_VecD] = &rms[26]; |
| 501 | idealreg2debugmask [Op_VecX] = &rms[27]; |
| 502 | idealreg2debugmask [Op_VecY] = &rms[28]; |
| 503 | idealreg2debugmask [Op_VecZ] = &rms[29]; |
| 504 | |
| 505 | idealreg2mhdebugmask[Op_VecA] = &rms[30]; |
| 506 | idealreg2mhdebugmask[Op_VecS] = &rms[31]; |
| 507 | idealreg2mhdebugmask[Op_VecD] = &rms[32]; |
| 508 | idealreg2mhdebugmask[Op_VecX] = &rms[33]; |
| 509 | idealreg2mhdebugmask[Op_VecY] = &rms[34]; |
| 510 | idealreg2mhdebugmask[Op_VecZ] = &rms[35]; |
| 511 | |
| 512 | idealreg2spillmask [Op_RegVectMask] = &rms[36]; |
| 513 | idealreg2debugmask [Op_RegVectMask] = &rms[37]; |
| 514 | idealreg2mhdebugmask[Op_RegVectMask] = &rms[38]; |
| 515 | |
| 516 | OptoReg::Name i; |
| 517 | |
| 518 | // At first, start with the empty mask |
| 519 | C->FIRST_STACK_mask().Clear(); |
| 520 | |
| 521 | // Add in the incoming argument area |
| 522 | OptoReg::Name init_in = OptoReg::add(_old_SP, C->out_preserve_stack_slots()); |
| 523 | for (i = init_in; i < _in_arg_limit; i = OptoReg::add(i,1)) { |
| 524 | C->FIRST_STACK_mask().Insert(i); |
| 525 | } |
| 526 | // Add in all bits past the outgoing argument area |
| 527 | guarantee(RegMask::can_represent_arg(OptoReg::add(_out_arg_limit,-1)),do { if (!(RegMask::can_represent_arg(OptoReg::add(_out_arg_limit ,-1)))) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 528, "guarantee(" "RegMask::can_represent_arg(OptoReg::add(_out_arg_limit,-1))" ") failed", "must be able to represent all call arguments in reg mask" ); ::breakpoint(); } } while (0) |
| 528 | "must be able to represent all call arguments in reg mask")do { if (!(RegMask::can_represent_arg(OptoReg::add(_out_arg_limit ,-1)))) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 528, "guarantee(" "RegMask::can_represent_arg(OptoReg::add(_out_arg_limit,-1))" ") failed", "must be able to represent all call arguments in reg mask" ); ::breakpoint(); } } while (0); |
| 529 | OptoReg::Name init = _out_arg_limit; |
| 530 | for (i = init; RegMask::can_represent(i); i = OptoReg::add(i,1)) { |
| 531 | C->FIRST_STACK_mask().Insert(i); |
| 532 | } |
| 533 | // Finally, set the "infinite stack" bit. |
| 534 | C->FIRST_STACK_mask().set_AllStack(); |
| 535 | |
| 536 | // Make spill masks. Registers for their class, plus FIRST_STACK_mask. |
| 537 | RegMask aligned_stack_mask = C->FIRST_STACK_mask(); |
| 538 | // Keep spill masks aligned. |
| 539 | aligned_stack_mask.clear_to_pairs(); |
| 540 | assert(aligned_stack_mask.is_AllStack(), "should be infinite stack")do { if (!(aligned_stack_mask.is_AllStack())) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 540, "assert(" "aligned_stack_mask.is_AllStack()" ") failed" , "should be infinite stack"); ::breakpoint(); } } while (0); |
| 541 | RegMask scalable_stack_mask = aligned_stack_mask; |
| 542 | |
| 543 | *idealreg2spillmask[Op_RegP] = *idealreg2regmask[Op_RegP]; |
| 544 | #ifdef _LP641 |
| 545 | *idealreg2spillmask[Op_RegN] = *idealreg2regmask[Op_RegN]; |
| 546 | idealreg2spillmask[Op_RegN]->OR(C->FIRST_STACK_mask()); |
| 547 | idealreg2spillmask[Op_RegP]->OR(aligned_stack_mask); |
| 548 | #else |
| 549 | idealreg2spillmask[Op_RegP]->OR(C->FIRST_STACK_mask()); |
| 550 | #endif |
| 551 | *idealreg2spillmask[Op_RegI] = *idealreg2regmask[Op_RegI]; |
| 552 | idealreg2spillmask[Op_RegI]->OR(C->FIRST_STACK_mask()); |
| 553 | *idealreg2spillmask[Op_RegL] = *idealreg2regmask[Op_RegL]; |
| 554 | idealreg2spillmask[Op_RegL]->OR(aligned_stack_mask); |
| 555 | *idealreg2spillmask[Op_RegF] = *idealreg2regmask[Op_RegF]; |
| 556 | idealreg2spillmask[Op_RegF]->OR(C->FIRST_STACK_mask()); |
| 557 | *idealreg2spillmask[Op_RegD] = *idealreg2regmask[Op_RegD]; |
| 558 | idealreg2spillmask[Op_RegD]->OR(aligned_stack_mask); |
| 559 | |
| 560 | if (Matcher::has_predicated_vectors()) { |
| 561 | *idealreg2spillmask[Op_RegVectMask] = *idealreg2regmask[Op_RegVectMask]; |
| 562 | idealreg2spillmask[Op_RegVectMask]->OR(aligned_stack_mask); |
| 563 | } else { |
| 564 | *idealreg2spillmask[Op_RegVectMask] = RegMask::Empty; |
| 565 | } |
| 566 | |
| 567 | if (Matcher::vector_size_supported(T_BYTE,4)) { |
| 568 | *idealreg2spillmask[Op_VecS] = *idealreg2regmask[Op_VecS]; |
| 569 | idealreg2spillmask[Op_VecS]->OR(C->FIRST_STACK_mask()); |
| 570 | } else { |
| 571 | *idealreg2spillmask[Op_VecS] = RegMask::Empty; |
| 572 | } |
| 573 | |
| 574 | if (Matcher::vector_size_supported(T_FLOAT,2)) { |
| 575 | // For VecD we need dual alignment and 8 bytes (2 slots) for spills. |
| 576 | // RA guarantees such alignment since it is needed for Double and Long values. |
| 577 | *idealreg2spillmask[Op_VecD] = *idealreg2regmask[Op_VecD]; |
| 578 | idealreg2spillmask[Op_VecD]->OR(aligned_stack_mask); |
| 579 | } else { |
| 580 | *idealreg2spillmask[Op_VecD] = RegMask::Empty; |
| 581 | } |
| 582 | |
| 583 | if (Matcher::vector_size_supported(T_FLOAT,4)) { |
| 584 | // For VecX we need quadro alignment and 16 bytes (4 slots) for spills. |
| 585 | // |
| 586 | // RA can use input arguments stack slots for spills but until RA |
| 587 | // we don't know frame size and offset of input arg stack slots. |
| 588 | // |
| 589 | // Exclude last input arg stack slots to avoid spilling vectors there |
| 590 | // otherwise vector spills could stomp over stack slots in caller frame. |
| 591 | OptoReg::Name in = OptoReg::add(_in_arg_limit, -1); |
| 592 | for (int k = 1; (in >= init_in) && (k < RegMask::SlotsPerVecX); k++) { |
| 593 | aligned_stack_mask.Remove(in); |
| 594 | in = OptoReg::add(in, -1); |
| 595 | } |
| 596 | aligned_stack_mask.clear_to_sets(RegMask::SlotsPerVecX); |
| 597 | assert(aligned_stack_mask.is_AllStack(), "should be infinite stack")do { if (!(aligned_stack_mask.is_AllStack())) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 597, "assert(" "aligned_stack_mask.is_AllStack()" ") failed" , "should be infinite stack"); ::breakpoint(); } } while (0); |
| 598 | *idealreg2spillmask[Op_VecX] = *idealreg2regmask[Op_VecX]; |
| 599 | idealreg2spillmask[Op_VecX]->OR(aligned_stack_mask); |
| 600 | } else { |
| 601 | *idealreg2spillmask[Op_VecX] = RegMask::Empty; |
| 602 | } |
| 603 | |
| 604 | if (Matcher::vector_size_supported(T_FLOAT,8)) { |
| 605 | // For VecY we need octo alignment and 32 bytes (8 slots) for spills. |
| 606 | OptoReg::Name in = OptoReg::add(_in_arg_limit, -1); |
| 607 | for (int k = 1; (in >= init_in) && (k < RegMask::SlotsPerVecY); k++) { |
| 608 | aligned_stack_mask.Remove(in); |
| 609 | in = OptoReg::add(in, -1); |
| 610 | } |
| 611 | aligned_stack_mask.clear_to_sets(RegMask::SlotsPerVecY); |
| 612 | assert(aligned_stack_mask.is_AllStack(), "should be infinite stack")do { if (!(aligned_stack_mask.is_AllStack())) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 612, "assert(" "aligned_stack_mask.is_AllStack()" ") failed" , "should be infinite stack"); ::breakpoint(); } } while (0); |
| 613 | *idealreg2spillmask[Op_VecY] = *idealreg2regmask[Op_VecY]; |
| 614 | idealreg2spillmask[Op_VecY]->OR(aligned_stack_mask); |
| 615 | } else { |
| 616 | *idealreg2spillmask[Op_VecY] = RegMask::Empty; |
| 617 | } |
| 618 | |
| 619 | if (Matcher::vector_size_supported(T_FLOAT,16)) { |
| 620 | // For VecZ we need enough alignment and 64 bytes (16 slots) for spills. |
| 621 | OptoReg::Name in = OptoReg::add(_in_arg_limit, -1); |
| 622 | for (int k = 1; (in >= init_in) && (k < RegMask::SlotsPerVecZ); k++) { |
| 623 | aligned_stack_mask.Remove(in); |
| 624 | in = OptoReg::add(in, -1); |
| 625 | } |
| 626 | aligned_stack_mask.clear_to_sets(RegMask::SlotsPerVecZ); |
| 627 | assert(aligned_stack_mask.is_AllStack(), "should be infinite stack")do { if (!(aligned_stack_mask.is_AllStack())) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 627, "assert(" "aligned_stack_mask.is_AllStack()" ") failed" , "should be infinite stack"); ::breakpoint(); } } while (0); |
| 628 | *idealreg2spillmask[Op_VecZ] = *idealreg2regmask[Op_VecZ]; |
| 629 | idealreg2spillmask[Op_VecZ]->OR(aligned_stack_mask); |
| 630 | } else { |
| 631 | *idealreg2spillmask[Op_VecZ] = RegMask::Empty; |
| 632 | } |
| 633 | |
| 634 | if (Matcher::supports_scalable_vector()) { |
| 635 | int k = 1; |
| 636 | OptoReg::Name in = OptoReg::add(_in_arg_limit, -1); |
| 637 | if (Matcher::has_predicated_vectors()) { |
| 638 | // Exclude last input arg stack slots to avoid spilling vector register there, |
| 639 | // otherwise RegVectMask spills could stomp over stack slots in caller frame. |
| 640 | for (; (in >= init_in) && (k < scalable_predicate_reg_slots()); k++) { |
| 641 | scalable_stack_mask.Remove(in); |
| 642 | in = OptoReg::add(in, -1); |
| 643 | } |
| 644 | |
| 645 | // For RegVectMask |
| 646 | scalable_stack_mask.clear_to_sets(scalable_predicate_reg_slots()); |
| 647 | assert(scalable_stack_mask.is_AllStack(), "should be infinite stack")do { if (!(scalable_stack_mask.is_AllStack())) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 647, "assert(" "scalable_stack_mask.is_AllStack()" ") failed" , "should be infinite stack"); ::breakpoint(); } } while (0); |
| 648 | *idealreg2spillmask[Op_RegVectMask] = *idealreg2regmask[Op_RegVectMask]; |
| 649 | idealreg2spillmask[Op_RegVectMask]->OR(scalable_stack_mask); |
| 650 | } |
| 651 | |
| 652 | // Exclude last input arg stack slots to avoid spilling vector register there, |
| 653 | // otherwise vector spills could stomp over stack slots in caller frame. |
| 654 | for (; (in >= init_in) && (k < scalable_vector_reg_size(T_FLOAT)); k++) { |
| 655 | scalable_stack_mask.Remove(in); |
| 656 | in = OptoReg::add(in, -1); |
| 657 | } |
| 658 | |
| 659 | // For VecA |
| 660 | scalable_stack_mask.clear_to_sets(RegMask::SlotsPerVecA); |
| 661 | assert(scalable_stack_mask.is_AllStack(), "should be infinite stack")do { if (!(scalable_stack_mask.is_AllStack())) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 661, "assert(" "scalable_stack_mask.is_AllStack()" ") failed" , "should be infinite stack"); ::breakpoint(); } } while (0); |
| 662 | *idealreg2spillmask[Op_VecA] = *idealreg2regmask[Op_VecA]; |
| 663 | idealreg2spillmask[Op_VecA]->OR(scalable_stack_mask); |
| 664 | } else { |
| 665 | *idealreg2spillmask[Op_VecA] = RegMask::Empty; |
| 666 | } |
| 667 | |
| 668 | if (UseFPUForSpilling) { |
| 669 | // This mask logic assumes that the spill operations are |
| 670 | // symmetric and that the registers involved are the same size. |
| 671 | // On sparc for instance we may have to use 64 bit moves will |
| 672 | // kill 2 registers when used with F0-F31. |
| 673 | idealreg2spillmask[Op_RegI]->OR(*idealreg2regmask[Op_RegF]); |
| 674 | idealreg2spillmask[Op_RegF]->OR(*idealreg2regmask[Op_RegI]); |
| 675 | #ifdef _LP641 |
| 676 | idealreg2spillmask[Op_RegN]->OR(*idealreg2regmask[Op_RegF]); |
| 677 | idealreg2spillmask[Op_RegL]->OR(*idealreg2regmask[Op_RegD]); |
| 678 | idealreg2spillmask[Op_RegD]->OR(*idealreg2regmask[Op_RegL]); |
| 679 | idealreg2spillmask[Op_RegP]->OR(*idealreg2regmask[Op_RegD]); |
| 680 | #else |
| 681 | idealreg2spillmask[Op_RegP]->OR(*idealreg2regmask[Op_RegF]); |
| 682 | #ifdef ARM |
| 683 | // ARM has support for moving 64bit values between a pair of |
| 684 | // integer registers and a double register |
| 685 | idealreg2spillmask[Op_RegL]->OR(*idealreg2regmask[Op_RegD]); |
| 686 | idealreg2spillmask[Op_RegD]->OR(*idealreg2regmask[Op_RegL]); |
| 687 | #endif |
| 688 | #endif |
| 689 | } |
| 690 | |
| 691 | // Make up debug masks. Any spill slot plus callee-save (SOE) registers. |
| 692 | // Caller-save (SOC, AS) registers are assumed to be trashable by the various |
| 693 | // inline-cache fixup routines. |
| 694 | *idealreg2debugmask [Op_RegN] = *idealreg2spillmask[Op_RegN]; |
| 695 | *idealreg2debugmask [Op_RegI] = *idealreg2spillmask[Op_RegI]; |
| 696 | *idealreg2debugmask [Op_RegL] = *idealreg2spillmask[Op_RegL]; |
| 697 | *idealreg2debugmask [Op_RegF] = *idealreg2spillmask[Op_RegF]; |
| 698 | *idealreg2debugmask [Op_RegD] = *idealreg2spillmask[Op_RegD]; |
| 699 | *idealreg2debugmask [Op_RegP] = *idealreg2spillmask[Op_RegP]; |
| 700 | *idealreg2debugmask [Op_RegVectMask] = *idealreg2spillmask[Op_RegVectMask]; |
| 701 | |
| 702 | *idealreg2debugmask [Op_VecA] = *idealreg2spillmask[Op_VecA]; |
| 703 | *idealreg2debugmask [Op_VecS] = *idealreg2spillmask[Op_VecS]; |
| 704 | *idealreg2debugmask [Op_VecD] = *idealreg2spillmask[Op_VecD]; |
| 705 | *idealreg2debugmask [Op_VecX] = *idealreg2spillmask[Op_VecX]; |
| 706 | *idealreg2debugmask [Op_VecY] = *idealreg2spillmask[Op_VecY]; |
| 707 | *idealreg2debugmask [Op_VecZ] = *idealreg2spillmask[Op_VecZ]; |
| 708 | |
| 709 | *idealreg2mhdebugmask[Op_RegN] = *idealreg2spillmask[Op_RegN]; |
| 710 | *idealreg2mhdebugmask[Op_RegI] = *idealreg2spillmask[Op_RegI]; |
| 711 | *idealreg2mhdebugmask[Op_RegL] = *idealreg2spillmask[Op_RegL]; |
| 712 | *idealreg2mhdebugmask[Op_RegF] = *idealreg2spillmask[Op_RegF]; |
| 713 | *idealreg2mhdebugmask[Op_RegD] = *idealreg2spillmask[Op_RegD]; |
| 714 | *idealreg2mhdebugmask[Op_RegP] = *idealreg2spillmask[Op_RegP]; |
| 715 | *idealreg2mhdebugmask[Op_RegVectMask] = *idealreg2spillmask[Op_RegVectMask]; |
| 716 | |
| 717 | *idealreg2mhdebugmask[Op_VecA] = *idealreg2spillmask[Op_VecA]; |
| 718 | *idealreg2mhdebugmask[Op_VecS] = *idealreg2spillmask[Op_VecS]; |
| 719 | *idealreg2mhdebugmask[Op_VecD] = *idealreg2spillmask[Op_VecD]; |
| 720 | *idealreg2mhdebugmask[Op_VecX] = *idealreg2spillmask[Op_VecX]; |
| 721 | *idealreg2mhdebugmask[Op_VecY] = *idealreg2spillmask[Op_VecY]; |
| 722 | *idealreg2mhdebugmask[Op_VecZ] = *idealreg2spillmask[Op_VecZ]; |
| 723 | |
| 724 | // Prevent stub compilations from attempting to reference |
| 725 | // callee-saved (SOE) registers from debug info |
| 726 | bool exclude_soe = !Compile::current()->is_method_compilation(); |
| 727 | RegMask* caller_save_mask = exclude_soe ? &caller_save_regmask_exclude_soe : &caller_save_regmask; |
| 728 | RegMask* mh_caller_save_mask = exclude_soe ? &mh_caller_save_regmask_exclude_soe : &mh_caller_save_regmask; |
| 729 | |
| 730 | idealreg2debugmask[Op_RegN]->SUBTRACT(*caller_save_mask); |
| 731 | idealreg2debugmask[Op_RegI]->SUBTRACT(*caller_save_mask); |
| 732 | idealreg2debugmask[Op_RegL]->SUBTRACT(*caller_save_mask); |
| 733 | idealreg2debugmask[Op_RegF]->SUBTRACT(*caller_save_mask); |
| 734 | idealreg2debugmask[Op_RegD]->SUBTRACT(*caller_save_mask); |
| 735 | idealreg2debugmask[Op_RegP]->SUBTRACT(*caller_save_mask); |
| 736 | idealreg2debugmask[Op_RegVectMask]->SUBTRACT(*caller_save_mask); |
| 737 | |
| 738 | idealreg2debugmask[Op_VecA]->SUBTRACT(*caller_save_mask); |
| 739 | idealreg2debugmask[Op_VecS]->SUBTRACT(*caller_save_mask); |
| 740 | idealreg2debugmask[Op_VecD]->SUBTRACT(*caller_save_mask); |
| 741 | idealreg2debugmask[Op_VecX]->SUBTRACT(*caller_save_mask); |
| 742 | idealreg2debugmask[Op_VecY]->SUBTRACT(*caller_save_mask); |
| 743 | idealreg2debugmask[Op_VecZ]->SUBTRACT(*caller_save_mask); |
| 744 | |
| 745 | idealreg2mhdebugmask[Op_RegN]->SUBTRACT(*mh_caller_save_mask); |
| 746 | idealreg2mhdebugmask[Op_RegI]->SUBTRACT(*mh_caller_save_mask); |
| 747 | idealreg2mhdebugmask[Op_RegL]->SUBTRACT(*mh_caller_save_mask); |
| 748 | idealreg2mhdebugmask[Op_RegF]->SUBTRACT(*mh_caller_save_mask); |
| 749 | idealreg2mhdebugmask[Op_RegD]->SUBTRACT(*mh_caller_save_mask); |
| 750 | idealreg2mhdebugmask[Op_RegP]->SUBTRACT(*mh_caller_save_mask); |
| 751 | idealreg2mhdebugmask[Op_RegVectMask]->SUBTRACT(*mh_caller_save_mask); |
| 752 | |
| 753 | idealreg2mhdebugmask[Op_VecA]->SUBTRACT(*mh_caller_save_mask); |
| 754 | idealreg2mhdebugmask[Op_VecS]->SUBTRACT(*mh_caller_save_mask); |
| 755 | idealreg2mhdebugmask[Op_VecD]->SUBTRACT(*mh_caller_save_mask); |
| 756 | idealreg2mhdebugmask[Op_VecX]->SUBTRACT(*mh_caller_save_mask); |
| 757 | idealreg2mhdebugmask[Op_VecY]->SUBTRACT(*mh_caller_save_mask); |
| 758 | idealreg2mhdebugmask[Op_VecZ]->SUBTRACT(*mh_caller_save_mask); |
| 759 | } |
| 760 | |
| 761 | //---------------------------is_save_on_entry---------------------------------- |
| 762 | bool Matcher::is_save_on_entry(int reg) { |
| 763 | return |
| 764 | _register_save_policy[reg] == 'E' || |
| 765 | _register_save_policy[reg] == 'A'; // Save-on-entry register? |
| 766 | } |
| 767 | |
| 768 | //---------------------------Fixup_Save_On_Entry------------------------------- |
| 769 | void Matcher::Fixup_Save_On_Entry( ) { |
| 770 | init_first_stack_mask(); |
| 771 | |
| 772 | Node *root = C->root(); // Short name for root |
| 773 | // Count number of save-on-entry registers. |
| 774 | uint soe_cnt = number_of_saved_registers(); |
| 775 | uint i; |
| 776 | |
| 777 | // Find the procedure Start Node |
| 778 | StartNode *start = C->start(); |
| 779 | assert( start, "Expect a start node" )do { if (!(start)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 779, "assert(" "start" ") failed", "Expect a start node"); :: breakpoint(); } } while (0); |
| 780 | |
| 781 | // Input RegMask array shared by all Returns. |
| 782 | // The type for doubles and longs has a count of 2, but |
| 783 | // there is only 1 returned value |
| 784 | uint ret_edge_cnt = TypeFunc::Parms + ((C->tf()->range()->cnt() == TypeFunc::Parms) ? 0 : 1); |
| 785 | RegMask *ret_rms = init_input_masks( ret_edge_cnt + soe_cnt, _return_addr_mask, c_frame_ptr_mask ); |
| 786 | // Returns have 0 or 1 returned values depending on call signature. |
| 787 | // Return register is specified by return_value in the AD file. |
| 788 | if (ret_edge_cnt > TypeFunc::Parms) |
| 789 | ret_rms[TypeFunc::Parms+0] = _return_value_mask; |
| 790 | |
| 791 | // Input RegMask array shared by all Rethrows. |
| 792 | uint reth_edge_cnt = TypeFunc::Parms+1; |
| 793 | RegMask *reth_rms = init_input_masks( reth_edge_cnt + soe_cnt, _return_addr_mask, c_frame_ptr_mask ); |
| 794 | // Rethrow takes exception oop only, but in the argument 0 slot. |
| 795 | OptoReg::Name reg = find_receiver(); |
| 796 | if (reg >= 0) { |
| 797 | reth_rms[TypeFunc::Parms] = mreg2regmask[reg]; |
| 798 | #ifdef _LP641 |
| 799 | // Need two slots for ptrs in 64-bit land |
| 800 | reth_rms[TypeFunc::Parms].Insert(OptoReg::add(OptoReg::Name(reg), 1)); |
| 801 | #endif |
| 802 | } |
| 803 | |
| 804 | // Input RegMask array shared by all TailCalls |
| 805 | uint tail_call_edge_cnt = TypeFunc::Parms+2; |
| 806 | RegMask *tail_call_rms = init_input_masks( tail_call_edge_cnt + soe_cnt, _return_addr_mask, c_frame_ptr_mask ); |
| 807 | |
| 808 | // Input RegMask array shared by all TailJumps |
| 809 | uint tail_jump_edge_cnt = TypeFunc::Parms+2; |
| 810 | RegMask *tail_jump_rms = init_input_masks( tail_jump_edge_cnt + soe_cnt, _return_addr_mask, c_frame_ptr_mask ); |
| 811 | |
| 812 | // TailCalls have 2 returned values (target & moop), whose masks come |
| 813 | // from the usual MachNode/MachOper mechanism. Find a sample |
| 814 | // TailCall to extract these masks and put the correct masks into |
| 815 | // the tail_call_rms array. |
| 816 | for( i=1; i < root->req(); i++ ) { |
| 817 | MachReturnNode *m = root->in(i)->as_MachReturn(); |
| 818 | if( m->ideal_Opcode() == Op_TailCall ) { |
| 819 | tail_call_rms[TypeFunc::Parms+0] = m->MachNode::in_RegMask(TypeFunc::Parms+0); |
| 820 | tail_call_rms[TypeFunc::Parms+1] = m->MachNode::in_RegMask(TypeFunc::Parms+1); |
| 821 | break; |
| 822 | } |
| 823 | } |
| 824 | |
| 825 | // TailJumps have 2 returned values (target & ex_oop), whose masks come |
| 826 | // from the usual MachNode/MachOper mechanism. Find a sample |
| 827 | // TailJump to extract these masks and put the correct masks into |
| 828 | // the tail_jump_rms array. |
| 829 | for( i=1; i < root->req(); i++ ) { |
| 830 | MachReturnNode *m = root->in(i)->as_MachReturn(); |
| 831 | if( m->ideal_Opcode() == Op_TailJump ) { |
| 832 | tail_jump_rms[TypeFunc::Parms+0] = m->MachNode::in_RegMask(TypeFunc::Parms+0); |
| 833 | tail_jump_rms[TypeFunc::Parms+1] = m->MachNode::in_RegMask(TypeFunc::Parms+1); |
| 834 | break; |
| 835 | } |
| 836 | } |
| 837 | |
| 838 | // Input RegMask array shared by all Halts |
| 839 | uint halt_edge_cnt = TypeFunc::Parms; |
| 840 | RegMask *halt_rms = init_input_masks( halt_edge_cnt + soe_cnt, _return_addr_mask, c_frame_ptr_mask ); |
| 841 | |
| 842 | // Capture the return input masks into each exit flavor |
| 843 | for( i=1; i < root->req(); i++ ) { |
| 844 | MachReturnNode *exit = root->in(i)->as_MachReturn(); |
| 845 | switch( exit->ideal_Opcode() ) { |
| 846 | case Op_Return : exit->_in_rms = ret_rms; break; |
| 847 | case Op_Rethrow : exit->_in_rms = reth_rms; break; |
| 848 | case Op_TailCall : exit->_in_rms = tail_call_rms; break; |
| 849 | case Op_TailJump : exit->_in_rms = tail_jump_rms; break; |
| 850 | case Op_Halt : exit->_in_rms = halt_rms; break; |
| 851 | default : ShouldNotReachHere()do { (*g_assert_poison) = 'X';; report_should_not_reach_here( "/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 851); ::breakpoint(); } while (0); |
| 852 | } |
| 853 | } |
| 854 | |
| 855 | // Next unused projection number from Start. |
| 856 | int proj_cnt = C->tf()->domain()->cnt(); |
| 857 | |
| 858 | // Do all the save-on-entry registers. Make projections from Start for |
| 859 | // them, and give them a use at the exit points. To the allocator, they |
| 860 | // look like incoming register arguments. |
| 861 | for( i = 0; i < _last_Mach_Reg; i++ ) { |
| 862 | if( is_save_on_entry(i) ) { |
| 863 | |
| 864 | // Add the save-on-entry to the mask array |
| 865 | ret_rms [ ret_edge_cnt] = mreg2regmask[i]; |
| 866 | reth_rms [ reth_edge_cnt] = mreg2regmask[i]; |
| 867 | tail_call_rms[tail_call_edge_cnt] = mreg2regmask[i]; |
| 868 | tail_jump_rms[tail_jump_edge_cnt] = mreg2regmask[i]; |
| 869 | // Halts need the SOE registers, but only in the stack as debug info. |
| 870 | // A just-prior uncommon-trap or deoptimization will use the SOE regs. |
| 871 | halt_rms [ halt_edge_cnt] = *idealreg2spillmask[_register_save_type[i]]; |
| 872 | |
| 873 | Node *mproj; |
| 874 | |
| 875 | // Is this a RegF low half of a RegD? Double up 2 adjacent RegF's |
| 876 | // into a single RegD. |
| 877 | if( (i&1) == 0 && |
| 878 | _register_save_type[i ] == Op_RegF && |
| 879 | _register_save_type[i+1] == Op_RegF && |
| 880 | is_save_on_entry(i+1) ) { |
| 881 | // Add other bit for double |
| 882 | ret_rms [ ret_edge_cnt].Insert(OptoReg::Name(i+1)); |
| 883 | reth_rms [ reth_edge_cnt].Insert(OptoReg::Name(i+1)); |
| 884 | tail_call_rms[tail_call_edge_cnt].Insert(OptoReg::Name(i+1)); |
| 885 | tail_jump_rms[tail_jump_edge_cnt].Insert(OptoReg::Name(i+1)); |
| 886 | halt_rms [ halt_edge_cnt].Insert(OptoReg::Name(i+1)); |
| 887 | mproj = new MachProjNode( start, proj_cnt, ret_rms[ret_edge_cnt], Op_RegD ); |
| 888 | proj_cnt += 2; // Skip 2 for doubles |
| 889 | } |
| 890 | else if( (i&1) == 1 && // Else check for high half of double |
| 891 | _register_save_type[i-1] == Op_RegF && |
| 892 | _register_save_type[i ] == Op_RegF && |
| 893 | is_save_on_entry(i-1) ) { |
| 894 | ret_rms [ ret_edge_cnt] = RegMask::Empty; |
| 895 | reth_rms [ reth_edge_cnt] = RegMask::Empty; |
| 896 | tail_call_rms[tail_call_edge_cnt] = RegMask::Empty; |
| 897 | tail_jump_rms[tail_jump_edge_cnt] = RegMask::Empty; |
| 898 | halt_rms [ halt_edge_cnt] = RegMask::Empty; |
| 899 | mproj = C->top(); |
| 900 | } |
| 901 | // Is this a RegI low half of a RegL? Double up 2 adjacent RegI's |
| 902 | // into a single RegL. |
| 903 | else if( (i&1) == 0 && |
| 904 | _register_save_type[i ] == Op_RegI && |
| 905 | _register_save_type[i+1] == Op_RegI && |
| 906 | is_save_on_entry(i+1) ) { |
| 907 | // Add other bit for long |
| 908 | ret_rms [ ret_edge_cnt].Insert(OptoReg::Name(i+1)); |
| 909 | reth_rms [ reth_edge_cnt].Insert(OptoReg::Name(i+1)); |
| 910 | tail_call_rms[tail_call_edge_cnt].Insert(OptoReg::Name(i+1)); |
| 911 | tail_jump_rms[tail_jump_edge_cnt].Insert(OptoReg::Name(i+1)); |
| 912 | halt_rms [ halt_edge_cnt].Insert(OptoReg::Name(i+1)); |
| 913 | mproj = new MachProjNode( start, proj_cnt, ret_rms[ret_edge_cnt], Op_RegL ); |
| 914 | proj_cnt += 2; // Skip 2 for longs |
| 915 | } |
| 916 | else if( (i&1) == 1 && // Else check for high half of long |
| 917 | _register_save_type[i-1] == Op_RegI && |
| 918 | _register_save_type[i ] == Op_RegI && |
| 919 | is_save_on_entry(i-1) ) { |
| 920 | ret_rms [ ret_edge_cnt] = RegMask::Empty; |
| 921 | reth_rms [ reth_edge_cnt] = RegMask::Empty; |
| 922 | tail_call_rms[tail_call_edge_cnt] = RegMask::Empty; |
| 923 | tail_jump_rms[tail_jump_edge_cnt] = RegMask::Empty; |
| 924 | halt_rms [ halt_edge_cnt] = RegMask::Empty; |
| 925 | mproj = C->top(); |
| 926 | } else { |
| 927 | // Make a projection for it off the Start |
| 928 | mproj = new MachProjNode( start, proj_cnt++, ret_rms[ret_edge_cnt], _register_save_type[i] ); |
| 929 | } |
| 930 | |
| 931 | ret_edge_cnt ++; |
| 932 | reth_edge_cnt ++; |
| 933 | tail_call_edge_cnt ++; |
| 934 | tail_jump_edge_cnt ++; |
| 935 | halt_edge_cnt ++; |
| 936 | |
| 937 | // Add a use of the SOE register to all exit paths |
| 938 | for( uint j=1; j < root->req(); j++ ) |
| 939 | root->in(j)->add_req(mproj); |
| 940 | } // End of if a save-on-entry register |
| 941 | } // End of for all machine registers |
| 942 | } |
| 943 | |
| 944 | //------------------------------init_spill_mask-------------------------------- |
| 945 | void Matcher::init_spill_mask( Node *ret ) { |
| 946 | if( idealreg2regmask[Op_RegI] ) return; // One time only init |
| 947 | |
| 948 | OptoReg::c_frame_pointer = c_frame_pointer(); |
| 949 | c_frame_ptr_mask = c_frame_pointer(); |
| 950 | #ifdef _LP641 |
| 951 | // pointers are twice as big |
| 952 | c_frame_ptr_mask.Insert(OptoReg::add(c_frame_pointer(),1)); |
| 953 | #endif |
| 954 | |
| 955 | // Start at OptoReg::stack0() |
| 956 | STACK_ONLY_mask.Clear(); |
| 957 | OptoReg::Name init = OptoReg::stack2reg(0); |
| 958 | // STACK_ONLY_mask is all stack bits |
| 959 | OptoReg::Name i; |
| 960 | for (i = init; RegMask::can_represent(i); i = OptoReg::add(i,1)) |
| 961 | STACK_ONLY_mask.Insert(i); |
| 962 | // Also set the "infinite stack" bit. |
| 963 | STACK_ONLY_mask.set_AllStack(); |
| 964 | |
| 965 | for (i = OptoReg::Name(0); i < OptoReg::Name(_last_Mach_Reg); i = OptoReg::add(i, 1)) { |
| 966 | // Copy the register names over into the shared world. |
| 967 | // SharedInfo::regName[i] = regName[i]; |
| 968 | // Handy RegMasks per machine register |
| 969 | mreg2regmask[i].Insert(i); |
| 970 | |
| 971 | // Set up regmasks used to exclude save-on-call (and always-save) registers from debug masks. |
| 972 | if (_register_save_policy[i] == 'C' || |
| 973 | _register_save_policy[i] == 'A') { |
| 974 | caller_save_regmask.Insert(i); |
| 975 | mh_caller_save_regmask.Insert(i); |
| 976 | } |
| 977 | // Exclude save-on-entry registers from debug masks for stub compilations. |
| 978 | if (_register_save_policy[i] == 'C' || |
| 979 | _register_save_policy[i] == 'A' || |
| 980 | _register_save_policy[i] == 'E') { |
| 981 | caller_save_regmask_exclude_soe.Insert(i); |
| 982 | mh_caller_save_regmask_exclude_soe.Insert(i); |
| 983 | } |
| 984 | } |
| 985 | |
| 986 | // Also exclude the register we use to save the SP for MethodHandle |
| 987 | // invokes to from the corresponding MH debug masks |
| 988 | const RegMask sp_save_mask = method_handle_invoke_SP_save_mask(); |
| 989 | mh_caller_save_regmask.OR(sp_save_mask); |
| 990 | mh_caller_save_regmask_exclude_soe.OR(sp_save_mask); |
| 991 | |
| 992 | // Grab the Frame Pointer |
| 993 | Node *fp = ret->in(TypeFunc::FramePtr); |
| 994 | // Share frame pointer while making spill ops |
| 995 | set_shared(fp); |
| 996 | |
| 997 | // Get the ADLC notion of the right regmask, for each basic type. |
| 998 | #ifdef _LP641 |
| 999 | idealreg2regmask[Op_RegN] = regmask_for_ideal_register(Op_RegN, ret); |
| 1000 | #endif |
| 1001 | idealreg2regmask[Op_RegI] = regmask_for_ideal_register(Op_RegI, ret); |
| 1002 | idealreg2regmask[Op_RegP] = regmask_for_ideal_register(Op_RegP, ret); |
| 1003 | idealreg2regmask[Op_RegF] = regmask_for_ideal_register(Op_RegF, ret); |
| 1004 | idealreg2regmask[Op_RegD] = regmask_for_ideal_register(Op_RegD, ret); |
| 1005 | idealreg2regmask[Op_RegL] = regmask_for_ideal_register(Op_RegL, ret); |
| 1006 | idealreg2regmask[Op_VecA] = regmask_for_ideal_register(Op_VecA, ret); |
| 1007 | idealreg2regmask[Op_VecS] = regmask_for_ideal_register(Op_VecS, ret); |
| 1008 | idealreg2regmask[Op_VecD] = regmask_for_ideal_register(Op_VecD, ret); |
| 1009 | idealreg2regmask[Op_VecX] = regmask_for_ideal_register(Op_VecX, ret); |
| 1010 | idealreg2regmask[Op_VecY] = regmask_for_ideal_register(Op_VecY, ret); |
| 1011 | idealreg2regmask[Op_VecZ] = regmask_for_ideal_register(Op_VecZ, ret); |
| 1012 | idealreg2regmask[Op_RegVectMask] = regmask_for_ideal_register(Op_RegVectMask, ret); |
| 1013 | } |
| 1014 | |
| 1015 | #ifdef ASSERT1 |
| 1016 | static void match_alias_type(Compile* C, Node* n, Node* m) { |
| 1017 | if (!VerifyAliases) return; // do not go looking for trouble by default |
| 1018 | const TypePtr* nat = n->adr_type(); |
| 1019 | const TypePtr* mat = m->adr_type(); |
| 1020 | int nidx = C->get_alias_index(nat); |
| 1021 | int midx = C->get_alias_index(mat); |
| 1022 | // Detune the assert for cases like (AndI 0xFF (LoadB p)). |
| 1023 | if (nidx == Compile::AliasIdxTop && midx >= Compile::AliasIdxRaw) { |
| 1024 | for (uint i = 1; i < n->req(); i++) { |
| 1025 | Node* n1 = n->in(i); |
| 1026 | const TypePtr* n1at = n1->adr_type(); |
| 1027 | if (n1at != NULL__null) { |
| 1028 | nat = n1at; |
| 1029 | nidx = C->get_alias_index(n1at); |
| 1030 | } |
| 1031 | } |
| 1032 | } |
| 1033 | // %%% Kludgery. Instead, fix ideal adr_type methods for all these cases: |
| 1034 | if (nidx == Compile::AliasIdxTop && midx == Compile::AliasIdxRaw) { |
| 1035 | switch (n->Opcode()) { |
| 1036 | case Op_PrefetchAllocation: |
| 1037 | nidx = Compile::AliasIdxRaw; |
| 1038 | nat = TypeRawPtr::BOTTOM; |
| 1039 | break; |
| 1040 | } |
| 1041 | } |
| 1042 | if (nidx == Compile::AliasIdxRaw && midx == Compile::AliasIdxTop) { |
| 1043 | switch (n->Opcode()) { |
| 1044 | case Op_ClearArray: |
| 1045 | midx = Compile::AliasIdxRaw; |
| 1046 | mat = TypeRawPtr::BOTTOM; |
Value stored to 'mat' is never read | |
| 1047 | break; |
| 1048 | } |
| 1049 | } |
| 1050 | if (nidx == Compile::AliasIdxTop && midx == Compile::AliasIdxBot) { |
| 1051 | switch (n->Opcode()) { |
| 1052 | case Op_Return: |
| 1053 | case Op_Rethrow: |
| 1054 | case Op_Halt: |
| 1055 | case Op_TailCall: |
| 1056 | case Op_TailJump: |
| 1057 | nidx = Compile::AliasIdxBot; |
| 1058 | nat = TypePtr::BOTTOM; |
| 1059 | break; |
| 1060 | } |
| 1061 | } |
| 1062 | if (nidx == Compile::AliasIdxBot && midx == Compile::AliasIdxTop) { |
| 1063 | switch (n->Opcode()) { |
| 1064 | case Op_StrComp: |
| 1065 | case Op_StrEquals: |
| 1066 | case Op_StrIndexOf: |
| 1067 | case Op_StrIndexOfChar: |
| 1068 | case Op_AryEq: |
| 1069 | case Op_HasNegatives: |
| 1070 | case Op_MemBarVolatile: |
| 1071 | case Op_MemBarCPUOrder: // %%% these ideals should have narrower adr_type? |
| 1072 | case Op_StrInflatedCopy: |
| 1073 | case Op_StrCompressedCopy: |
| 1074 | case Op_OnSpinWait: |
| 1075 | case Op_EncodeISOArray: |
| 1076 | nidx = Compile::AliasIdxTop; |
| 1077 | nat = NULL__null; |
| 1078 | break; |
| 1079 | } |
| 1080 | } |
| 1081 | if (nidx != midx) { |
| 1082 | if (PrintOpto || (PrintMiscellaneous && (WizardMode || Verbose))) { |
| 1083 | tty->print_cr("==== Matcher alias shift %d => %d", nidx, midx); |
| 1084 | n->dump(); |
| 1085 | m->dump(); |
| 1086 | } |
| 1087 | assert(C->subsume_loads() && C->must_alias(nat, midx),do { if (!(C->subsume_loads() && C->must_alias( nat, midx))) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 1088, "assert(" "C->subsume_loads() && C->must_alias(nat, midx)" ") failed", "must not lose alias info when matching"); ::breakpoint (); } } while (0) |
| 1088 | "must not lose alias info when matching")do { if (!(C->subsume_loads() && C->must_alias( nat, midx))) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 1088, "assert(" "C->subsume_loads() && C->must_alias(nat, midx)" ") failed", "must not lose alias info when matching"); ::breakpoint (); } } while (0); |
| 1089 | } |
| 1090 | } |
| 1091 | #endif |
| 1092 | |
| 1093 | //------------------------------xform------------------------------------------ |
| 1094 | // Given a Node in old-space, Match him (Label/Reduce) to produce a machine |
| 1095 | // Node in new-space. Given a new-space Node, recursively walk his children. |
| 1096 | Node *Matcher::transform( Node *n ) { ShouldNotCallThis()do { (*g_assert_poison) = 'X';; report_should_not_call("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 1096); ::breakpoint(); } while (0); return n; } |
| 1097 | Node *Matcher::xform( Node *n, int max_stack ) { |
| 1098 | // Use one stack to keep both: child's node/state and parent's node/index |
| 1099 | MStack mstack(max_stack * 2 * 2); // usually: C->live_nodes() * 2 * 2 |
| 1100 | mstack.push(n, Visit, NULL__null, -1); // set NULL as parent to indicate root |
| 1101 | while (mstack.is_nonempty()) { |
| 1102 | C->check_node_count(NodeLimitFudgeFactor, "too many nodes matching instructions"); |
| 1103 | if (C->failing()) return NULL__null; |
| 1104 | n = mstack.node(); // Leave node on stack |
| 1105 | Node_State nstate = mstack.state(); |
| 1106 | if (nstate == Visit) { |
| 1107 | mstack.set_state(Post_Visit); |
| 1108 | Node *oldn = n; |
| 1109 | // Old-space or new-space check |
| 1110 | if (!C->node_arena()->contains(n)) { |
| 1111 | // Old space! |
| 1112 | Node* m; |
| 1113 | if (has_new_node(n)) { // Not yet Label/Reduced |
| 1114 | m = new_node(n); |
| 1115 | } else { |
| 1116 | if (!is_dontcare(n)) { // Matcher can match this guy |
| 1117 | // Calls match special. They match alone with no children. |
| 1118 | // Their children, the incoming arguments, match normally. |
| 1119 | m = n->is_SafePoint() ? match_sfpt(n->as_SafePoint()):match_tree(n); |
| 1120 | if (C->failing()) return NULL__null; |
| 1121 | if (m == NULL__null) { Matcher::soft_match_failure(); return NULL__null; } |
| 1122 | if (n->is_MemBar()) { |
| 1123 | m->as_MachMemBar()->set_adr_type(n->adr_type()); |
| 1124 | } |
| 1125 | } else { // Nothing the matcher cares about |
| 1126 | if (n->is_Proj() && n->in(0) != NULL__null && n->in(0)->is_Multi()) { // Projections? |
| 1127 | // Convert to machine-dependent projection |
| 1128 | m = n->in(0)->as_Multi()->match( n->as_Proj(), this ); |
| 1129 | NOT_PRODUCT(record_new2old(m, n);)record_new2old(m, n); |
| 1130 | if (m->in(0) != NULL__null) // m might be top |
| 1131 | collect_null_checks(m, n); |
| 1132 | } else { // Else just a regular 'ol guy |
| 1133 | m = n->clone(); // So just clone into new-space |
| 1134 | NOT_PRODUCT(record_new2old(m, n);)record_new2old(m, n); |
| 1135 | // Def-Use edges will be added incrementally as Uses |
| 1136 | // of this node are matched. |
| 1137 | assert(m->outcnt() == 0, "no Uses of this clone yet")do { if (!(m->outcnt() == 0)) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 1137, "assert(" "m->outcnt() == 0" ") failed", "no Uses of this clone yet" ); ::breakpoint(); } } while (0); |
| 1138 | } |
| 1139 | } |
| 1140 | |
| 1141 | set_new_node(n, m); // Map old to new |
| 1142 | if (_old_node_note_array != NULL__null) { |
| 1143 | Node_Notes* nn = C->locate_node_notes(_old_node_note_array, |
| 1144 | n->_idx); |
| 1145 | C->set_node_notes_at(m->_idx, nn); |
| 1146 | } |
| 1147 | debug_only(match_alias_type(C, n, m))match_alias_type(C, n, m); |
| 1148 | } |
| 1149 | n = m; // n is now a new-space node |
| 1150 | mstack.set_node(n); |
| 1151 | } |
| 1152 | |
| 1153 | // New space! |
| 1154 | if (_visited.test_set(n->_idx)) continue; // while(mstack.is_nonempty()) |
| 1155 | |
| 1156 | int i; |
| 1157 | // Put precedence edges on stack first (match them last). |
| 1158 | for (i = oldn->req(); (uint)i < oldn->len(); i++) { |
| 1159 | Node *m = oldn->in(i); |
| 1160 | if (m == NULL__null) break; |
| 1161 | // set -1 to call add_prec() instead of set_req() during Step1 |
| 1162 | mstack.push(m, Visit, n, -1); |
| 1163 | } |
| 1164 | |
| 1165 | // Handle precedence edges for interior nodes |
| 1166 | for (i = n->len()-1; (uint)i >= n->req(); i--) { |
| 1167 | Node *m = n->in(i); |
| 1168 | if (m == NULL__null || C->node_arena()->contains(m)) continue; |
| 1169 | n->rm_prec(i); |
| 1170 | // set -1 to call add_prec() instead of set_req() during Step1 |
| 1171 | mstack.push(m, Visit, n, -1); |
| 1172 | } |
| 1173 | |
| 1174 | // For constant debug info, I'd rather have unmatched constants. |
| 1175 | int cnt = n->req(); |
| 1176 | JVMState* jvms = n->jvms(); |
| 1177 | int debug_cnt = jvms ? jvms->debug_start() : cnt; |
| 1178 | |
| 1179 | // Now do only debug info. Clone constants rather than matching. |
| 1180 | // Constants are represented directly in the debug info without |
| 1181 | // the need for executable machine instructions. |
| 1182 | // Monitor boxes are also represented directly. |
| 1183 | for (i = cnt - 1; i >= debug_cnt; --i) { // For all debug inputs do |
| 1184 | Node *m = n->in(i); // Get input |
| 1185 | int op = m->Opcode(); |
| 1186 | assert((op == Op_BoxLock) == jvms->is_monitor_use(i), "boxes only at monitor sites")do { if (!((op == Op_BoxLock) == jvms->is_monitor_use(i))) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 1186, "assert(" "(op == Op_BoxLock) == jvms->is_monitor_use(i)" ") failed", "boxes only at monitor sites"); ::breakpoint(); } } while (0); |
| 1187 | if( op == Op_ConI || op == Op_ConP || op == Op_ConN || op == Op_ConNKlass || |
| 1188 | op == Op_ConF || op == Op_ConD || op == Op_ConL |
| 1189 | // || op == Op_BoxLock // %%%% enable this and remove (+++) in chaitin.cpp |
| 1190 | ) { |
| 1191 | m = m->clone(); |
| 1192 | NOT_PRODUCT(record_new2old(m, n))record_new2old(m, n); |
| 1193 | mstack.push(m, Post_Visit, n, i); // Don't need to visit |
| 1194 | mstack.push(m->in(0), Visit, m, 0); |
| 1195 | } else { |
| 1196 | mstack.push(m, Visit, n, i); |
| 1197 | } |
| 1198 | } |
| 1199 | |
| 1200 | // And now walk his children, and convert his inputs to new-space. |
| 1201 | for( ; i >= 0; --i ) { // For all normal inputs do |
| 1202 | Node *m = n->in(i); // Get input |
| 1203 | if(m != NULL__null) |
| 1204 | mstack.push(m, Visit, n, i); |
| 1205 | } |
| 1206 | |
| 1207 | } |
| 1208 | else if (nstate == Post_Visit) { |
| 1209 | // Set xformed input |
| 1210 | Node *p = mstack.parent(); |
| 1211 | if (p != NULL__null) { // root doesn't have parent |
| 1212 | int i = (int)mstack.index(); |
| 1213 | if (i >= 0) |
| 1214 | p->set_req(i, n); // required input |
| 1215 | else if (i == -1) |
| 1216 | p->add_prec(n); // precedence input |
| 1217 | else |
| 1218 | ShouldNotReachHere()do { (*g_assert_poison) = 'X';; report_should_not_reach_here( "/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 1218); ::breakpoint(); } while (0); |
| 1219 | } |
| 1220 | mstack.pop(); // remove processed node from stack |
| 1221 | } |
| 1222 | else { |
| 1223 | ShouldNotReachHere()do { (*g_assert_poison) = 'X';; report_should_not_reach_here( "/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 1223); ::breakpoint(); } while (0); |
| 1224 | } |
| 1225 | } // while (mstack.is_nonempty()) |
| 1226 | return n; // Return new-space Node |
| 1227 | } |
| 1228 | |
| 1229 | //------------------------------warp_outgoing_stk_arg------------------------ |
| 1230 | OptoReg::Name Matcher::warp_outgoing_stk_arg( VMReg reg, OptoReg::Name begin_out_arg_area, OptoReg::Name &out_arg_limit_per_call ) { |
| 1231 | // Convert outgoing argument location to a pre-biased stack offset |
| 1232 | if (reg->is_stack()) { |
| 1233 | OptoReg::Name warped = reg->reg2stack(); |
| 1234 | // Adjust the stack slot offset to be the register number used |
| 1235 | // by the allocator. |
| 1236 | warped = OptoReg::add(begin_out_arg_area, warped); |
| 1237 | // Keep track of the largest numbered stack slot used for an arg. |
| 1238 | // Largest used slot per call-site indicates the amount of stack |
| 1239 | // that is killed by the call. |
| 1240 | if( warped >= out_arg_limit_per_call ) |
| 1241 | out_arg_limit_per_call = OptoReg::add(warped,1); |
| 1242 | if (!RegMask::can_represent_arg(warped)) { |
| 1243 | C->record_method_not_compilable("unsupported calling sequence"); |
| 1244 | return OptoReg::Bad; |
| 1245 | } |
| 1246 | return warped; |
| 1247 | } |
| 1248 | return OptoReg::as_OptoReg(reg); |
| 1249 | } |
| 1250 | |
| 1251 | |
| 1252 | //------------------------------match_sfpt------------------------------------- |
| 1253 | // Helper function to match call instructions. Calls match special. |
| 1254 | // They match alone with no children. Their children, the incoming |
| 1255 | // arguments, match normally. |
| 1256 | MachNode *Matcher::match_sfpt( SafePointNode *sfpt ) { |
| 1257 | MachSafePointNode *msfpt = NULL__null; |
| 1258 | MachCallNode *mcall = NULL__null; |
| 1259 | uint cnt; |
| 1260 | // Split out case for SafePoint vs Call |
| 1261 | CallNode *call; |
| 1262 | const TypeTuple *domain; |
| 1263 | ciMethod* method = NULL__null; |
| 1264 | bool is_method_handle_invoke = false; // for special kill effects |
| 1265 | if( sfpt->is_Call() ) { |
| 1266 | call = sfpt->as_Call(); |
| 1267 | domain = call->tf()->domain(); |
| 1268 | cnt = domain->cnt(); |
| 1269 | |
| 1270 | // Match just the call, nothing else |
| 1271 | MachNode *m = match_tree(call); |
| 1272 | if (C->failing()) return NULL__null; |
| 1273 | if( m == NULL__null ) { Matcher::soft_match_failure(); return NULL__null; } |
| 1274 | |
| 1275 | // Copy data from the Ideal SafePoint to the machine version |
| 1276 | mcall = m->as_MachCall(); |
| 1277 | |
| 1278 | mcall->set_tf( call->tf()); |
| 1279 | mcall->set_entry_point( call->entry_point()); |
| 1280 | mcall->set_cnt( call->cnt()); |
| 1281 | mcall->set_guaranteed_safepoint(call->guaranteed_safepoint()); |
| 1282 | |
| 1283 | if( mcall->is_MachCallJava() ) { |
| 1284 | MachCallJavaNode *mcall_java = mcall->as_MachCallJava(); |
| 1285 | const CallJavaNode *call_java = call->as_CallJava(); |
| 1286 | assert(call_java->validate_symbolic_info(), "inconsistent info")do { if (!(call_java->validate_symbolic_info())) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 1286, "assert(" "call_java->validate_symbolic_info()" ") failed" , "inconsistent info"); ::breakpoint(); } } while (0); |
| 1287 | method = call_java->method(); |
| 1288 | mcall_java->_method = method; |
| 1289 | mcall_java->_optimized_virtual = call_java->is_optimized_virtual(); |
| 1290 | is_method_handle_invoke = call_java->is_method_handle_invoke(); |
| 1291 | mcall_java->_method_handle_invoke = is_method_handle_invoke; |
| 1292 | mcall_java->_override_symbolic_info = call_java->override_symbolic_info(); |
| 1293 | mcall_java->_arg_escape = call_java->arg_escape(); |
| 1294 | if (is_method_handle_invoke) { |
| 1295 | C->set_has_method_handle_invokes(true); |
| 1296 | } |
| 1297 | if( mcall_java->is_MachCallStaticJava() ) |
| 1298 | mcall_java->as_MachCallStaticJava()->_name = |
| 1299 | call_java->as_CallStaticJava()->_name; |
| 1300 | if( mcall_java->is_MachCallDynamicJava() ) |
| 1301 | mcall_java->as_MachCallDynamicJava()->_vtable_index = |
| 1302 | call_java->as_CallDynamicJava()->_vtable_index; |
| 1303 | } |
| 1304 | else if( mcall->is_MachCallRuntime() ) { |
| 1305 | MachCallRuntimeNode* mach_call_rt = mcall->as_MachCallRuntime(); |
| 1306 | mach_call_rt->_name = call->as_CallRuntime()->_name; |
| 1307 | mach_call_rt->_leaf_no_fp = call->is_CallLeafNoFP(); |
| 1308 | } |
| 1309 | else if( mcall->is_MachCallNative() ) { |
| 1310 | MachCallNativeNode* mach_call_native = mcall->as_MachCallNative(); |
| 1311 | CallNativeNode* call_native = call->as_CallNative(); |
| 1312 | mach_call_native->_name = call_native->_name; |
| 1313 | mach_call_native->_arg_regs = call_native->_arg_regs; |
| 1314 | mach_call_native->_ret_regs = call_native->_ret_regs; |
| 1315 | } |
| 1316 | msfpt = mcall; |
| 1317 | } |
| 1318 | // This is a non-call safepoint |
| 1319 | else { |
| 1320 | call = NULL__null; |
| 1321 | domain = NULL__null; |
| 1322 | MachNode *mn = match_tree(sfpt); |
| 1323 | if (C->failing()) return NULL__null; |
| 1324 | msfpt = mn->as_MachSafePoint(); |
| 1325 | cnt = TypeFunc::Parms; |
| 1326 | } |
| 1327 | msfpt->_has_ea_local_in_scope = sfpt->has_ea_local_in_scope(); |
| 1328 | |
| 1329 | // Advertise the correct memory effects (for anti-dependence computation). |
| 1330 | msfpt->set_adr_type(sfpt->adr_type()); |
| 1331 | |
| 1332 | // Allocate a private array of RegMasks. These RegMasks are not shared. |
| 1333 | msfpt->_in_rms = NEW_RESOURCE_ARRAY( RegMask, cnt )(RegMask*) resource_allocate_bytes((cnt) * sizeof(RegMask)); |
| 1334 | // Empty them all. |
| 1335 | for (uint i = 0; i < cnt; i++) ::new (&(msfpt->_in_rms[i])) RegMask(); |
| 1336 | |
| 1337 | // Do all the pre-defined non-Empty register masks |
| 1338 | msfpt->_in_rms[TypeFunc::ReturnAdr] = _return_addr_mask; |
| 1339 | msfpt->_in_rms[TypeFunc::FramePtr ] = c_frame_ptr_mask; |
| 1340 | |
| 1341 | // Place first outgoing argument can possibly be put. |
| 1342 | OptoReg::Name begin_out_arg_area = OptoReg::add(_new_SP, C->out_preserve_stack_slots()); |
| 1343 | assert( is_even(begin_out_arg_area), "" )do { if (!(is_even(begin_out_arg_area))) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 1343, "assert(" "is_even(begin_out_arg_area)" ") failed", "" ); ::breakpoint(); } } while (0); |
| 1344 | // Compute max outgoing register number per call site. |
| 1345 | OptoReg::Name out_arg_limit_per_call = begin_out_arg_area; |
| 1346 | // Calls to C may hammer extra stack slots above and beyond any arguments. |
| 1347 | // These are usually backing store for register arguments for varargs. |
| 1348 | if( call != NULL__null && call->is_CallRuntime() ) |
| 1349 | out_arg_limit_per_call = OptoReg::add(out_arg_limit_per_call,C->varargs_C_out_slots_killed()); |
| 1350 | if( call != NULL__null && call->is_CallNative() ) |
| 1351 | out_arg_limit_per_call = OptoReg::add(out_arg_limit_per_call, call->as_CallNative()->_shadow_space_bytes); |
| 1352 | |
| 1353 | |
| 1354 | // Do the normal argument list (parameters) register masks |
| 1355 | int argcnt = cnt - TypeFunc::Parms; |
| 1356 | if( argcnt > 0 ) { // Skip it all if we have no args |
| 1357 | BasicType *sig_bt = NEW_RESOURCE_ARRAY( BasicType, argcnt )(BasicType*) resource_allocate_bytes((argcnt) * sizeof(BasicType )); |
| 1358 | VMRegPair *parm_regs = NEW_RESOURCE_ARRAY( VMRegPair, argcnt )(VMRegPair*) resource_allocate_bytes((argcnt) * sizeof(VMRegPair )); |
| 1359 | int i; |
| 1360 | for( i = 0; i < argcnt; i++ ) { |
| 1361 | sig_bt[i] = domain->field_at(i+TypeFunc::Parms)->basic_type(); |
| 1362 | } |
| 1363 | // V-call to pick proper calling convention |
| 1364 | call->calling_convention( sig_bt, parm_regs, argcnt ); |
| 1365 | |
| 1366 | #ifdef ASSERT1 |
| 1367 | // Sanity check users' calling convention. Really handy during |
| 1368 | // the initial porting effort. Fairly expensive otherwise. |
| 1369 | { for (int i = 0; i<argcnt; i++) { |
| 1370 | if( !parm_regs[i].first()->is_valid() && |
| 1371 | !parm_regs[i].second()->is_valid() ) continue; |
| 1372 | VMReg reg1 = parm_regs[i].first(); |
| 1373 | VMReg reg2 = parm_regs[i].second(); |
| 1374 | for (int j = 0; j < i; j++) { |
| 1375 | if( !parm_regs[j].first()->is_valid() && |
| 1376 | !parm_regs[j].second()->is_valid() ) continue; |
| 1377 | VMReg reg3 = parm_regs[j].first(); |
| 1378 | VMReg reg4 = parm_regs[j].second(); |
| 1379 | if( !reg1->is_valid() ) { |
| 1380 | assert( !reg2->is_valid(), "valid halvsies" )do { if (!(!reg2->is_valid())) { (*g_assert_poison) = 'X'; ; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 1380, "assert(" "!reg2->is_valid()" ") failed", "valid halvsies" ); ::breakpoint(); } } while (0); |
| 1381 | } else if( !reg3->is_valid() ) { |
| 1382 | assert( !reg4->is_valid(), "valid halvsies" )do { if (!(!reg4->is_valid())) { (*g_assert_poison) = 'X'; ; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 1382, "assert(" "!reg4->is_valid()" ") failed", "valid halvsies" ); ::breakpoint(); } } while (0); |
| 1383 | } else { |
| 1384 | assert( reg1 != reg2, "calling conv. must produce distinct regs")do { if (!(reg1 != reg2)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 1384, "assert(" "reg1 != reg2" ") failed", "calling conv. must produce distinct regs" ); ::breakpoint(); } } while (0); |
| 1385 | assert( reg1 != reg3, "calling conv. must produce distinct regs")do { if (!(reg1 != reg3)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 1385, "assert(" "reg1 != reg3" ") failed", "calling conv. must produce distinct regs" ); ::breakpoint(); } } while (0); |
| 1386 | assert( reg1 != reg4, "calling conv. must produce distinct regs")do { if (!(reg1 != reg4)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 1386, "assert(" "reg1 != reg4" ") failed", "calling conv. must produce distinct regs" ); ::breakpoint(); } } while (0); |
| 1387 | assert( reg2 != reg3, "calling conv. must produce distinct regs")do { if (!(reg2 != reg3)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 1387, "assert(" "reg2 != reg3" ") failed", "calling conv. must produce distinct regs" ); ::breakpoint(); } } while (0); |
| 1388 | assert( reg2 != reg4 || !reg2->is_valid(), "calling conv. must produce distinct regs")do { if (!(reg2 != reg4 || !reg2->is_valid())) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 1388, "assert(" "reg2 != reg4 || !reg2->is_valid()" ") failed" , "calling conv. must produce distinct regs"); ::breakpoint() ; } } while (0); |
| 1389 | assert( reg3 != reg4, "calling conv. must produce distinct regs")do { if (!(reg3 != reg4)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 1389, "assert(" "reg3 != reg4" ") failed", "calling conv. must produce distinct regs" ); ::breakpoint(); } } while (0); |
| 1390 | } |
| 1391 | } |
| 1392 | } |
| 1393 | } |
| 1394 | #endif |
| 1395 | |
| 1396 | // Visit each argument. Compute its outgoing register mask. |
| 1397 | // Return results now can have 2 bits returned. |
| 1398 | // Compute max over all outgoing arguments both per call-site |
| 1399 | // and over the entire method. |
| 1400 | for( i = 0; i < argcnt; i++ ) { |
| 1401 | // Address of incoming argument mask to fill in |
| 1402 | RegMask *rm = &mcall->_in_rms[i+TypeFunc::Parms]; |
| 1403 | VMReg first = parm_regs[i].first(); |
| 1404 | VMReg second = parm_regs[i].second(); |
| 1405 | if(!first->is_valid() && |
| 1406 | !second->is_valid()) { |
| 1407 | continue; // Avoid Halves |
| 1408 | } |
| 1409 | // Handle case where arguments are in vector registers. |
| 1410 | if(call->in(TypeFunc::Parms + i)->bottom_type()->isa_vect()) { |
| 1411 | OptoReg::Name reg_fst = OptoReg::as_OptoReg(first); |
| 1412 | OptoReg::Name reg_snd = OptoReg::as_OptoReg(second); |
| 1413 | assert (reg_fst <= reg_snd, "fst=%d snd=%d", reg_fst, reg_snd)do { if (!(reg_fst <= reg_snd)) { (*g_assert_poison) = 'X' ;; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 1413, "assert(" "reg_fst <= reg_snd" ") failed", "fst=%d snd=%d" , reg_fst, reg_snd); ::breakpoint(); } } while (0); |
| 1414 | for (OptoReg::Name r = reg_fst; r <= reg_snd; r++) { |
| 1415 | rm->Insert(r); |
| 1416 | } |
| 1417 | } |
| 1418 | // Grab first register, adjust stack slots and insert in mask. |
| 1419 | OptoReg::Name reg1 = warp_outgoing_stk_arg(first, begin_out_arg_area, out_arg_limit_per_call ); |
| 1420 | if (OptoReg::is_valid(reg1)) |
| 1421 | rm->Insert( reg1 ); |
| 1422 | // Grab second register (if any), adjust stack slots and insert in mask. |
| 1423 | OptoReg::Name reg2 = warp_outgoing_stk_arg(second, begin_out_arg_area, out_arg_limit_per_call ); |
| 1424 | if (OptoReg::is_valid(reg2)) |
| 1425 | rm->Insert( reg2 ); |
| 1426 | } // End of for all arguments |
| 1427 | } |
| 1428 | |
| 1429 | // Compute the max stack slot killed by any call. These will not be |
| 1430 | // available for debug info, and will be used to adjust FIRST_STACK_mask |
| 1431 | // after all call sites have been visited. |
| 1432 | if( _out_arg_limit < out_arg_limit_per_call) |
| 1433 | _out_arg_limit = out_arg_limit_per_call; |
| 1434 | |
| 1435 | if (mcall) { |
| 1436 | // Kill the outgoing argument area, including any non-argument holes and |
| 1437 | // any legacy C-killed slots. Use Fat-Projections to do the killing. |
| 1438 | // Since the max-per-method covers the max-per-call-site and debug info |
| 1439 | // is excluded on the max-per-method basis, debug info cannot land in |
| 1440 | // this killed area. |
| 1441 | uint r_cnt = mcall->tf()->range()->cnt(); |
| 1442 | MachProjNode *proj = new MachProjNode( mcall, r_cnt+10000, RegMask::Empty, MachProjNode::fat_proj ); |
| 1443 | if (!RegMask::can_represent_arg(OptoReg::Name(out_arg_limit_per_call-1))) { |
| 1444 | C->record_method_not_compilable("unsupported outgoing calling sequence"); |
| 1445 | } else { |
| 1446 | for (int i = begin_out_arg_area; i < out_arg_limit_per_call; i++) |
| 1447 | proj->_rout.Insert(OptoReg::Name(i)); |
| 1448 | } |
| 1449 | if (proj->_rout.is_NotEmpty()) { |
| 1450 | push_projection(proj); |
| 1451 | } |
| 1452 | } |
| 1453 | // Transfer the safepoint information from the call to the mcall |
| 1454 | // Move the JVMState list |
| 1455 | msfpt->set_jvms(sfpt->jvms()); |
| 1456 | for (JVMState* jvms = msfpt->jvms(); jvms; jvms = jvms->caller()) { |
| 1457 | jvms->set_map(sfpt); |
| 1458 | } |
| 1459 | |
| 1460 | // Debug inputs begin just after the last incoming parameter |
| 1461 | assert((mcall == NULL) || (mcall->jvms() == NULL) ||do { if (!((mcall == __null) || (mcall->jvms() == __null) || (mcall->jvms()->debug_start() + mcall->_jvmadj == mcall ->tf()->domain()->cnt()))) { (*g_assert_poison) = 'X' ;; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 1462, "assert(" "(mcall == __null) || (mcall->jvms() == __null) || (mcall->jvms()->debug_start() + mcall->_jvmadj == mcall->tf()->domain()->cnt())" ") failed", ""); ::breakpoint(); } } while (0) |
| 1462 | (mcall->jvms()->debug_start() + mcall->_jvmadj == mcall->tf()->domain()->cnt()), "")do { if (!((mcall == __null) || (mcall->jvms() == __null) || (mcall->jvms()->debug_start() + mcall->_jvmadj == mcall ->tf()->domain()->cnt()))) { (*g_assert_poison) = 'X' ;; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 1462, "assert(" "(mcall == __null) || (mcall->jvms() == __null) || (mcall->jvms()->debug_start() + mcall->_jvmadj == mcall->tf()->domain()->cnt())" ") failed", ""); ::breakpoint(); } } while (0); |
| 1463 | |
| 1464 | // Add additional edges. |
| 1465 | if (msfpt->mach_constant_base_node_input() != (uint)-1 && !msfpt->is_MachCallLeaf()) { |
| 1466 | // For these calls we can not add MachConstantBase in expand(), as the |
| 1467 | // ins are not complete then. |
| 1468 | msfpt->ins_req(msfpt->mach_constant_base_node_input(), C->mach_constant_base_node()); |
| 1469 | if (msfpt->jvms() && |
| 1470 | msfpt->mach_constant_base_node_input() <= msfpt->jvms()->debug_start() + msfpt->_jvmadj) { |
| 1471 | // We added an edge before jvms, so we must adapt the position of the ins. |
| 1472 | msfpt->jvms()->adapt_position(+1); |
| 1473 | } |
| 1474 | } |
| 1475 | |
| 1476 | // Registers killed by the call are set in the local scheduling pass |
| 1477 | // of Global Code Motion. |
| 1478 | return msfpt; |
| 1479 | } |
| 1480 | |
| 1481 | //---------------------------match_tree---------------------------------------- |
| 1482 | // Match a Ideal Node DAG - turn it into a tree; Label & Reduce. Used as part |
| 1483 | // of the whole-sale conversion from Ideal to Mach Nodes. Also used for |
| 1484 | // making GotoNodes while building the CFG and in init_spill_mask() to identify |
| 1485 | // a Load's result RegMask for memoization in idealreg2regmask[] |
| 1486 | MachNode *Matcher::match_tree( const Node *n ) { |
| 1487 | assert( n->Opcode() != Op_Phi, "cannot match" )do { if (!(n->Opcode() != Op_Phi)) { (*g_assert_poison) = 'X' ;; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 1487, "assert(" "n->Opcode() != Op_Phi" ") failed", "cannot match" ); ::breakpoint(); } } while (0); |
| 1488 | assert( !n->is_block_start(), "cannot match" )do { if (!(!n->is_block_start())) { (*g_assert_poison) = 'X' ;; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 1488, "assert(" "!n->is_block_start()" ") failed", "cannot match" ); ::breakpoint(); } } while (0); |
| 1489 | // Set the mark for all locally allocated State objects. |
| 1490 | // When this call returns, the _states_arena arena will be reset |
| 1491 | // freeing all State objects. |
| 1492 | ResourceMark rm( &_states_arena ); |
| 1493 | |
| 1494 | LabelRootDepth = 0; |
| 1495 | |
| 1496 | // StoreNodes require their Memory input to match any LoadNodes |
| 1497 | Node *mem = n->is_Store() ? n->in(MemNode::Memory) : (Node*)1 ; |
| 1498 | #ifdef ASSERT1 |
| 1499 | Node* save_mem_node = _mem_node; |
| 1500 | _mem_node = n->is_Store() ? (Node*)n : NULL__null; |
| 1501 | #endif |
| 1502 | // State object for root node of match tree |
| 1503 | // Allocate it on _states_arena - stack allocation can cause stack overflow. |
| 1504 | State *s = new (&_states_arena) State; |
| 1505 | s->_kids[0] = NULL__null; |
| 1506 | s->_kids[1] = NULL__null; |
| 1507 | s->_leaf = (Node*)n; |
| 1508 | // Label the input tree, allocating labels from top-level arena |
| 1509 | Node* root_mem = mem; |
| 1510 | Label_Root(n, s, n->in(0), root_mem); |
| 1511 | if (C->failing()) return NULL__null; |
| 1512 | |
| 1513 | // The minimum cost match for the whole tree is found at the root State |
| 1514 | uint mincost = max_juint; |
| 1515 | uint cost = max_juint; |
| 1516 | uint i; |
| 1517 | for (i = 0; i < NUM_OPERANDS139; i++) { |
| 1518 | if (s->valid(i) && // valid entry and |
| 1519 | s->cost(i) < cost && // low cost and |
| 1520 | s->rule(i) >= NUM_OPERANDS139) {// not an operand |
| 1521 | mincost = i; |
| 1522 | cost = s->cost(i); |
| 1523 | } |
| 1524 | } |
| 1525 | if (mincost == max_juint) { |
| 1526 | #ifndef PRODUCT |
| 1527 | tty->print("No matching rule for:"); |
| 1528 | s->dump(); |
| 1529 | #endif |
| 1530 | Matcher::soft_match_failure(); |
| 1531 | return NULL__null; |
| 1532 | } |
| 1533 | // Reduce input tree based upon the state labels to machine Nodes |
| 1534 | MachNode *m = ReduceInst(s, s->rule(mincost), mem); |
| 1535 | // New-to-old mapping is done in ReduceInst, to cover complex instructions. |
| 1536 | NOT_PRODUCT(_old2new_map.map(n->_idx, m);)_old2new_map.map(n->_idx, m); |
| 1537 | |
| 1538 | // Add any Matcher-ignored edges |
| 1539 | uint cnt = n->req(); |
| 1540 | uint start = 1; |
| 1541 | if( mem != (Node*)1 ) start = MemNode::Memory+1; |
| 1542 | if( n->is_AddP() ) { |
| 1543 | assert( mem == (Node*)1, "" )do { if (!(mem == (Node*)1)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 1543, "assert(" "mem == (Node*)1" ") failed", ""); ::breakpoint (); } } while (0); |
| 1544 | start = AddPNode::Base+1; |
| 1545 | } |
| 1546 | for( i = start; i < cnt; i++ ) { |
| 1547 | if( !n->match_edge(i) ) { |
| 1548 | if( i < m->req() ) |
| 1549 | m->ins_req( i, n->in(i) ); |
| 1550 | else |
| 1551 | m->add_req( n->in(i) ); |
| 1552 | } |
| 1553 | } |
| 1554 | |
| 1555 | debug_only( _mem_node = save_mem_node; )_mem_node = save_mem_node; |
| 1556 | return m; |
| 1557 | } |
| 1558 | |
| 1559 | |
| 1560 | //------------------------------match_into_reg--------------------------------- |
| 1561 | // Choose to either match this Node in a register or part of the current |
| 1562 | // match tree. Return true for requiring a register and false for matching |
| 1563 | // as part of the current match tree. |
| 1564 | static bool match_into_reg( const Node *n, Node *m, Node *control, int i, bool shared ) { |
| 1565 | |
| 1566 | const Type *t = m->bottom_type(); |
| 1567 | |
| 1568 | if (t->singleton()) { |
| 1569 | // Never force constants into registers. Allow them to match as |
| 1570 | // constants or registers. Copies of the same value will share |
| 1571 | // the same register. See find_shared_node. |
| 1572 | return false; |
| 1573 | } else { // Not a constant |
| 1574 | // Stop recursion if they have different Controls. |
| 1575 | Node* m_control = m->in(0); |
| 1576 | // Control of load's memory can post-dominates load's control. |
| 1577 | // So use it since load can't float above its memory. |
| 1578 | Node* mem_control = (m->is_Load()) ? m->in(MemNode::Memory)->in(0) : NULL__null; |
| 1579 | if (control && m_control && control != m_control && control != mem_control) { |
| 1580 | |
| 1581 | // Actually, we can live with the most conservative control we |
| 1582 | // find, if it post-dominates the others. This allows us to |
| 1583 | // pick up load/op/store trees where the load can float a little |
| 1584 | // above the store. |
| 1585 | Node *x = control; |
| 1586 | const uint max_scan = 6; // Arbitrary scan cutoff |
| 1587 | uint j; |
| 1588 | for (j=0; j<max_scan; j++) { |
| 1589 | if (x->is_Region()) // Bail out at merge points |
| 1590 | return true; |
| 1591 | x = x->in(0); |
| 1592 | if (x == m_control) // Does 'control' post-dominate |
| 1593 | break; // m->in(0)? If so, we can use it |
| 1594 | if (x == mem_control) // Does 'control' post-dominate |
| 1595 | break; // mem_control? If so, we can use it |
| 1596 | } |
| 1597 | if (j == max_scan) // No post-domination before scan end? |
| 1598 | return true; // Then break the match tree up |
| 1599 | } |
| 1600 | if ((m->is_DecodeN() && Matcher::narrow_oop_use_complex_address()) || |
| 1601 | (m->is_DecodeNKlass() && Matcher::narrow_klass_use_complex_address())) { |
| 1602 | // These are commonly used in address expressions and can |
| 1603 | // efficiently fold into them on X64 in some cases. |
| 1604 | return false; |
| 1605 | } |
| 1606 | } |
| 1607 | |
| 1608 | // Not forceable cloning. If shared, put it into a register. |
| 1609 | return shared; |
| 1610 | } |
| 1611 | |
| 1612 | |
| 1613 | //------------------------------Instruction Selection-------------------------- |
| 1614 | // Label method walks a "tree" of nodes, using the ADLC generated DFA to match |
| 1615 | // ideal nodes to machine instructions. Trees are delimited by shared Nodes, |
| 1616 | // things the Matcher does not match (e.g., Memory), and things with different |
| 1617 | // Controls (hence forced into different blocks). We pass in the Control |
| 1618 | // selected for this entire State tree. |
| 1619 | |
| 1620 | // The Matcher works on Trees, but an Intel add-to-memory requires a DAG: the |
| 1621 | // Store and the Load must have identical Memories (as well as identical |
| 1622 | // pointers). Since the Matcher does not have anything for Memory (and |
| 1623 | // does not handle DAGs), I have to match the Memory input myself. If the |
| 1624 | // Tree root is a Store or if there are multiple Loads in the tree, I require |
| 1625 | // all Loads to have the identical memory. |
| 1626 | Node* Matcher::Label_Root(const Node* n, State* svec, Node* control, Node*& mem) { |
| 1627 | // Since Label_Root is a recursive function, its possible that we might run |
| 1628 | // out of stack space. See bugs 6272980 & 6227033 for more info. |
| 1629 | LabelRootDepth++; |
| 1630 | if (LabelRootDepth > MaxLabelRootDepth) { |
| 1631 | C->record_method_not_compilable("Out of stack space, increase MaxLabelRootDepth"); |
| 1632 | return NULL__null; |
| 1633 | } |
| 1634 | uint care = 0; // Edges matcher cares about |
| 1635 | uint cnt = n->req(); |
| 1636 | uint i = 0; |
| 1637 | |
| 1638 | // Examine children for memory state |
| 1639 | // Can only subsume a child into your match-tree if that child's memory state |
| 1640 | // is not modified along the path to another input. |
| 1641 | // It is unsafe even if the other inputs are separate roots. |
| 1642 | Node *input_mem = NULL__null; |
| 1643 | for( i = 1; i < cnt; i++ ) { |
| 1644 | if( !n->match_edge(i) ) continue; |
| 1645 | Node *m = n->in(i); // Get ith input |
| 1646 | assert( m, "expect non-null children" )do { if (!(m)) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 1646, "assert(" "m" ") failed", "expect non-null children") ; ::breakpoint(); } } while (0); |
| 1647 | if( m->is_Load() ) { |
| 1648 | if( input_mem == NULL__null ) { |
| 1649 | input_mem = m->in(MemNode::Memory); |
| 1650 | if (mem == (Node*)1) { |
| 1651 | // Save this memory to bail out if there's another memory access |
| 1652 | // to a different memory location in the same tree. |
| 1653 | mem = input_mem; |
| 1654 | } |
| 1655 | } else if( input_mem != m->in(MemNode::Memory) ) { |
| 1656 | input_mem = NodeSentinel(Node*)-1; |
| 1657 | } |
| 1658 | } |
| 1659 | } |
| 1660 | |
| 1661 | for( i = 1; i < cnt; i++ ){// For my children |
| 1662 | if( !n->match_edge(i) ) continue; |
| 1663 | Node *m = n->in(i); // Get ith input |
| 1664 | // Allocate states out of a private arena |
| 1665 | State *s = new (&_states_arena) State; |
| 1666 | svec->_kids[care++] = s; |
| 1667 | assert( care <= 2, "binary only for now" )do { if (!(care <= 2)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 1667, "assert(" "care <= 2" ") failed", "binary only for now" ); ::breakpoint(); } } while (0); |
| 1668 | |
| 1669 | // Recursively label the State tree. |
| 1670 | s->_kids[0] = NULL__null; |
| 1671 | s->_kids[1] = NULL__null; |
| 1672 | s->_leaf = m; |
| 1673 | |
| 1674 | // Check for leaves of the State Tree; things that cannot be a part of |
| 1675 | // the current tree. If it finds any, that value is matched as a |
| 1676 | // register operand. If not, then the normal matching is used. |
| 1677 | if( match_into_reg(n, m, control, i, is_shared(m)) || |
| 1678 | // Stop recursion if this is a LoadNode and there is another memory access |
| 1679 | // to a different memory location in the same tree (for example, a StoreNode |
| 1680 | // at the root of this tree or another LoadNode in one of the children). |
| 1681 | ((mem!=(Node*)1) && m->is_Load() && m->in(MemNode::Memory) != mem) || |
| 1682 | // Can NOT include the match of a subtree when its memory state |
| 1683 | // is used by any of the other subtrees |
| 1684 | (input_mem == NodeSentinel(Node*)-1) ) { |
| 1685 | // Print when we exclude matching due to different memory states at input-loads |
| 1686 | if (PrintOpto && (Verbose && WizardMode) && (input_mem == NodeSentinel(Node*)-1) |
| 1687 | && !((mem!=(Node*)1) && m->is_Load() && m->in(MemNode::Memory) != mem)) { |
| 1688 | tty->print_cr("invalid input_mem"); |
| 1689 | } |
| 1690 | // Switch to a register-only opcode; this value must be in a register |
| 1691 | // and cannot be subsumed as part of a larger instruction. |
| 1692 | s->DFA( m->ideal_reg(), m ); |
| 1693 | |
| 1694 | } else { |
| 1695 | // If match tree has no control and we do, adopt it for entire tree |
| 1696 | if( control == NULL__null && m->in(0) != NULL__null && m->req() > 1 ) |
| 1697 | control = m->in(0); // Pick up control |
| 1698 | // Else match as a normal part of the match tree. |
| 1699 | control = Label_Root(m, s, control, mem); |
| 1700 | if (C->failing()) return NULL__null; |
| 1701 | } |
| 1702 | } |
| 1703 | |
| 1704 | // Call DFA to match this node, and return |
| 1705 | svec->DFA( n->Opcode(), n ); |
| 1706 | |
| 1707 | #ifdef ASSERT1 |
| 1708 | uint x; |
| 1709 | for( x = 0; x < _LAST_MACH_OPER; x++ ) |
| 1710 | if( svec->valid(x) ) |
| 1711 | break; |
| 1712 | |
| 1713 | if (x >= _LAST_MACH_OPER) { |
| 1714 | n->dump(); |
| 1715 | svec->dump(); |
| 1716 | assert( false, "bad AD file" )do { if (!(false)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 1716, "assert(" "false" ") failed", "bad AD file"); ::breakpoint (); } } while (0); |
| 1717 | } |
| 1718 | #endif |
| 1719 | return control; |
| 1720 | } |
| 1721 | |
| 1722 | |
| 1723 | // Con nodes reduced using the same rule can share their MachNode |
| 1724 | // which reduces the number of copies of a constant in the final |
| 1725 | // program. The register allocator is free to split uses later to |
| 1726 | // split live ranges. |
| 1727 | MachNode* Matcher::find_shared_node(Node* leaf, uint rule) { |
| 1728 | if (!leaf->is_Con() && !leaf->is_DecodeNarrowPtr()) return NULL__null; |
| 1729 | |
| 1730 | // See if this Con has already been reduced using this rule. |
| 1731 | if (_shared_nodes.Size() <= leaf->_idx) return NULL__null; |
| 1732 | MachNode* last = (MachNode*)_shared_nodes.at(leaf->_idx); |
| 1733 | if (last != NULL__null && rule == last->rule()) { |
| 1734 | // Don't expect control change for DecodeN |
| 1735 | if (leaf->is_DecodeNarrowPtr()) |
| 1736 | return last; |
| 1737 | // Get the new space root. |
| 1738 | Node* xroot = new_node(C->root()); |
| 1739 | if (xroot == NULL__null) { |
| 1740 | // This shouldn't happen give the order of matching. |
| 1741 | return NULL__null; |
| 1742 | } |
| 1743 | |
| 1744 | // Shared constants need to have their control be root so they |
| 1745 | // can be scheduled properly. |
| 1746 | Node* control = last->in(0); |
| 1747 | if (control != xroot) { |
| 1748 | if (control == NULL__null || control == C->root()) { |
| 1749 | last->set_req(0, xroot); |
| 1750 | } else { |
| 1751 | assert(false, "unexpected control")do { if (!(false)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 1751, "assert(" "false" ") failed", "unexpected control"); :: breakpoint(); } } while (0); |
| 1752 | return NULL__null; |
| 1753 | } |
| 1754 | } |
| 1755 | return last; |
| 1756 | } |
| 1757 | return NULL__null; |
| 1758 | } |
| 1759 | |
| 1760 | |
| 1761 | //------------------------------ReduceInst------------------------------------- |
| 1762 | // Reduce a State tree (with given Control) into a tree of MachNodes. |
| 1763 | // This routine (and it's cohort ReduceOper) convert Ideal Nodes into |
| 1764 | // complicated machine Nodes. Each MachNode covers some tree of Ideal Nodes. |
| 1765 | // Each MachNode has a number of complicated MachOper operands; each |
| 1766 | // MachOper also covers a further tree of Ideal Nodes. |
| 1767 | |
| 1768 | // The root of the Ideal match tree is always an instruction, so we enter |
| 1769 | // the recursion here. After building the MachNode, we need to recurse |
| 1770 | // the tree checking for these cases: |
| 1771 | // (1) Child is an instruction - |
| 1772 | // Build the instruction (recursively), add it as an edge. |
| 1773 | // Build a simple operand (register) to hold the result of the instruction. |
| 1774 | // (2) Child is an interior part of an instruction - |
| 1775 | // Skip over it (do nothing) |
| 1776 | // (3) Child is the start of a operand - |
| 1777 | // Build the operand, place it inside the instruction |
| 1778 | // Call ReduceOper. |
| 1779 | MachNode *Matcher::ReduceInst( State *s, int rule, Node *&mem ) { |
| 1780 | assert( rule >= NUM_OPERANDS, "called with operand rule" )do { if (!(rule >= 139)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 1780, "assert(" "rule >= 139" ") failed", "called with operand rule" ); ::breakpoint(); } } while (0); |
| 1781 | |
| 1782 | MachNode* shared_node = find_shared_node(s->_leaf, rule); |
| 1783 | if (shared_node != NULL__null) { |
| 1784 | return shared_node; |
| 1785 | } |
| 1786 | |
| 1787 | // Build the object to represent this state & prepare for recursive calls |
| 1788 | MachNode *mach = s->MachNodeGenerator(rule); |
| 1789 | guarantee(mach != NULL, "Missing MachNode")do { if (!(mach != __null)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 1789, "guarantee(" "mach != NULL" ") failed", "Missing MachNode" ); ::breakpoint(); } } while (0); |
| 1790 | mach->_opnds[0] = s->MachOperGenerator(_reduceOp[rule]); |
| 1791 | assert( mach->_opnds[0] != NULL, "Missing result operand" )do { if (!(mach->_opnds[0] != __null)) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 1791, "assert(" "mach->_opnds[0] != __null" ") failed", "Missing result operand" ); ::breakpoint(); } } while (0); |
| 1792 | Node *leaf = s->_leaf; |
| 1793 | NOT_PRODUCT(record_new2old(mach, leaf);)record_new2old(mach, leaf); |
| 1794 | // Check for instruction or instruction chain rule |
| 1795 | if( rule >= _END_INST_CHAIN_RULE || rule < _BEGIN_INST_CHAIN_RULE ) { |
| 1796 | assert(C->node_arena()->contains(s->_leaf) || !has_new_node(s->_leaf),do { if (!(C->node_arena()->contains(s->_leaf) || !has_new_node (s->_leaf))) { (*g_assert_poison) = 'X';; report_vm_error( "/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 1797, "assert(" "C->node_arena()->contains(s->_leaf) || !has_new_node(s->_leaf)" ") failed", "duplicating node that's already been matched"); ::breakpoint(); } } while (0) |
| 1797 | "duplicating node that's already been matched")do { if (!(C->node_arena()->contains(s->_leaf) || !has_new_node (s->_leaf))) { (*g_assert_poison) = 'X';; report_vm_error( "/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 1797, "assert(" "C->node_arena()->contains(s->_leaf) || !has_new_node(s->_leaf)" ") failed", "duplicating node that's already been matched"); ::breakpoint(); } } while (0); |
| 1798 | // Instruction |
| 1799 | mach->add_req( leaf->in(0) ); // Set initial control |
| 1800 | // Reduce interior of complex instruction |
| 1801 | ReduceInst_Interior( s, rule, mem, mach, 1 ); |
| 1802 | } else { |
| 1803 | // Instruction chain rules are data-dependent on their inputs |
| 1804 | mach->add_req(0); // Set initial control to none |
| 1805 | ReduceInst_Chain_Rule( s, rule, mem, mach ); |
| 1806 | } |
| 1807 | |
| 1808 | // If a Memory was used, insert a Memory edge |
| 1809 | if( mem != (Node*)1 ) { |
| 1810 | mach->ins_req(MemNode::Memory,mem); |
| 1811 | #ifdef ASSERT1 |
| 1812 | // Verify adr type after matching memory operation |
| 1813 | const MachOper* oper = mach->memory_operand(); |
| 1814 | if (oper != NULL__null && oper != (MachOper*)-1) { |
| 1815 | // It has a unique memory operand. Find corresponding ideal mem node. |
| 1816 | Node* m = NULL__null; |
| 1817 | if (leaf->is_Mem()) { |
| 1818 | m = leaf; |
| 1819 | } else { |
| 1820 | m = _mem_node; |
| 1821 | assert(m != NULL && m->is_Mem(), "expecting memory node")do { if (!(m != __null && m->is_Mem())) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 1821, "assert(" "m != __null && m->is_Mem()" ") failed" , "expecting memory node"); ::breakpoint(); } } while (0); |
| 1822 | } |
| 1823 | const Type* mach_at = mach->adr_type(); |
| 1824 | // DecodeN node consumed by an address may have different type |
| 1825 | // than its input. Don't compare types for such case. |
| 1826 | if (m->adr_type() != mach_at && |
| 1827 | (m->in(MemNode::Address)->is_DecodeNarrowPtr() || |
| 1828 | (m->in(MemNode::Address)->is_AddP() && |
| 1829 | m->in(MemNode::Address)->in(AddPNode::Address)->is_DecodeNarrowPtr()) || |
| 1830 | (m->in(MemNode::Address)->is_AddP() && |
| 1831 | m->in(MemNode::Address)->in(AddPNode::Address)->is_AddP() && |
| 1832 | m->in(MemNode::Address)->in(AddPNode::Address)->in(AddPNode::Address)->is_DecodeNarrowPtr()))) { |
| 1833 | mach_at = m->adr_type(); |
| 1834 | } |
| 1835 | if (m->adr_type() != mach_at) { |
| 1836 | m->dump(); |
| 1837 | tty->print_cr("mach:"); |
| 1838 | mach->dump(1); |
| 1839 | } |
| 1840 | assert(m->adr_type() == mach_at, "matcher should not change adr type")do { if (!(m->adr_type() == mach_at)) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 1840, "assert(" "m->adr_type() == mach_at" ") failed", "matcher should not change adr type" ); ::breakpoint(); } } while (0); |
| 1841 | } |
| 1842 | #endif |
| 1843 | } |
| 1844 | |
| 1845 | // If the _leaf is an AddP, insert the base edge |
| 1846 | if (leaf->is_AddP()) { |
| 1847 | mach->ins_req(AddPNode::Base,leaf->in(AddPNode::Base)); |
| 1848 | } |
| 1849 | |
| 1850 | uint number_of_projections_prior = number_of_projections(); |
| 1851 | |
| 1852 | // Perform any 1-to-many expansions required |
| 1853 | MachNode *ex = mach->Expand(s, _projection_list, mem); |
| 1854 | if (ex != mach) { |
| 1855 | assert(ex->ideal_reg() == mach->ideal_reg(), "ideal types should match")do { if (!(ex->ideal_reg() == mach->ideal_reg())) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 1855, "assert(" "ex->ideal_reg() == mach->ideal_reg()" ") failed", "ideal types should match"); ::breakpoint(); } } while (0); |
| 1856 | if( ex->in(1)->is_Con() ) |
| 1857 | ex->in(1)->set_req(0, C->root()); |
| 1858 | // Remove old node from the graph |
| 1859 | for( uint i=0; i<mach->req(); i++ ) { |
| 1860 | mach->set_req(i,NULL__null); |
| 1861 | } |
| 1862 | NOT_PRODUCT(record_new2old(ex, s->_leaf);)record_new2old(ex, s->_leaf); |
| 1863 | } |
| 1864 | |
| 1865 | // PhaseChaitin::fixup_spills will sometimes generate spill code |
| 1866 | // via the matcher. By the time, nodes have been wired into the CFG, |
| 1867 | // and any further nodes generated by expand rules will be left hanging |
| 1868 | // in space, and will not get emitted as output code. Catch this. |
| 1869 | // Also, catch any new register allocation constraints ("projections") |
| 1870 | // generated belatedly during spill code generation. |
| 1871 | if (_allocation_started) { |
| 1872 | guarantee(ex == mach, "no expand rules during spill generation")do { if (!(ex == mach)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 1872, "guarantee(" "ex == mach" ") failed", "no expand rules during spill generation" ); ::breakpoint(); } } while (0); |
| 1873 | guarantee(number_of_projections_prior == number_of_projections(), "no allocation during spill generation")do { if (!(number_of_projections_prior == number_of_projections ())) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 1873, "guarantee(" "number_of_projections_prior == number_of_projections()" ") failed", "no allocation during spill generation"); ::breakpoint (); } } while (0); |
| 1874 | } |
| 1875 | |
| 1876 | if (leaf->is_Con() || leaf->is_DecodeNarrowPtr()) { |
| 1877 | // Record the con for sharing |
| 1878 | _shared_nodes.map(leaf->_idx, ex); |
| 1879 | } |
| 1880 | |
| 1881 | // Have mach nodes inherit GC barrier data |
| 1882 | if (leaf->is_LoadStore()) { |
| 1883 | mach->set_barrier_data(leaf->as_LoadStore()->barrier_data()); |
| 1884 | } else if (leaf->is_Mem()) { |
| 1885 | mach->set_barrier_data(leaf->as_Mem()->barrier_data()); |
| 1886 | } |
| 1887 | |
| 1888 | return ex; |
| 1889 | } |
| 1890 | |
| 1891 | void Matcher::handle_precedence_edges(Node* n, MachNode *mach) { |
| 1892 | for (uint i = n->req(); i < n->len(); i++) { |
| 1893 | if (n->in(i) != NULL__null) { |
| 1894 | mach->add_prec(n->in(i)); |
| 1895 | } |
| 1896 | } |
| 1897 | } |
| 1898 | |
| 1899 | void Matcher::ReduceInst_Chain_Rule(State* s, int rule, Node* &mem, MachNode* mach) { |
| 1900 | // 'op' is what I am expecting to receive |
| 1901 | int op = _leftOp[rule]; |
| 1902 | // Operand type to catch childs result |
| 1903 | // This is what my child will give me. |
| 1904 | unsigned int opnd_class_instance = s->rule(op); |
| 1905 | // Choose between operand class or not. |
| 1906 | // This is what I will receive. |
| 1907 | int catch_op = (FIRST_OPERAND_CLASS138 <= op && op < NUM_OPERANDS139) ? opnd_class_instance : op; |
| 1908 | // New rule for child. Chase operand classes to get the actual rule. |
| 1909 | unsigned int newrule = s->rule(catch_op); |
| 1910 | |
| 1911 | if (newrule < NUM_OPERANDS139) { |
| 1912 | // Chain from operand or operand class, may be output of shared node |
| 1913 | assert(opnd_class_instance < NUM_OPERANDS, "Bad AD file: Instruction chain rule must chain from operand")do { if (!(opnd_class_instance < 139)) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 1913, "assert(" "opnd_class_instance < 139" ") failed", "Bad AD file: Instruction chain rule must chain from operand" ); ::breakpoint(); } } while (0); |
| 1914 | // Insert operand into array of operands for this instruction |
| 1915 | mach->_opnds[1] = s->MachOperGenerator(opnd_class_instance); |
| 1916 | |
| 1917 | ReduceOper(s, newrule, mem, mach); |
| 1918 | } else { |
| 1919 | // Chain from the result of an instruction |
| 1920 | assert(newrule >= _LAST_MACH_OPER, "Do NOT chain from internal operand")do { if (!(newrule >= _LAST_MACH_OPER)) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 1920, "assert(" "newrule >= _LAST_MACH_OPER" ") failed", "Do NOT chain from internal operand"); ::breakpoint(); } } while (0); |
| 1921 | mach->_opnds[1] = s->MachOperGenerator(_reduceOp[catch_op]); |
| 1922 | Node *mem1 = (Node*)1; |
| 1923 | debug_only(Node *save_mem_node = _mem_node;)Node *save_mem_node = _mem_node; |
| 1924 | mach->add_req( ReduceInst(s, newrule, mem1) ); |
| 1925 | debug_only(_mem_node = save_mem_node;)_mem_node = save_mem_node; |
| 1926 | } |
| 1927 | return; |
| 1928 | } |
| 1929 | |
| 1930 | |
| 1931 | uint Matcher::ReduceInst_Interior( State *s, int rule, Node *&mem, MachNode *mach, uint num_opnds ) { |
| 1932 | handle_precedence_edges(s->_leaf, mach); |
| 1933 | |
| 1934 | if( s->_leaf->is_Load() ) { |
| 1935 | Node *mem2 = s->_leaf->in(MemNode::Memory); |
| 1936 | assert( mem == (Node*)1 || mem == mem2, "multiple Memories being matched at once?" )do { if (!(mem == (Node*)1 || mem == mem2)) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 1936, "assert(" "mem == (Node*)1 || mem == mem2" ") failed" , "multiple Memories being matched at once?"); ::breakpoint() ; } } while (0); |
| 1937 | debug_only( if( mem == (Node*)1 ) _mem_node = s->_leaf;)if( mem == (Node*)1 ) _mem_node = s->_leaf; |
| 1938 | mem = mem2; |
| 1939 | } |
| 1940 | if( s->_leaf->in(0) != NULL__null && s->_leaf->req() > 1) { |
| 1941 | if( mach->in(0) == NULL__null ) |
| 1942 | mach->set_req(0, s->_leaf->in(0)); |
| 1943 | } |
| 1944 | |
| 1945 | // Now recursively walk the state tree & add operand list. |
| 1946 | for( uint i=0; i<2; i++ ) { // binary tree |
| 1947 | State *newstate = s->_kids[i]; |
| 1948 | if( newstate == NULL__null ) break; // Might only have 1 child |
| 1949 | // 'op' is what I am expecting to receive |
| 1950 | int op; |
| 1951 | if( i == 0 ) { |
| 1952 | op = _leftOp[rule]; |
| 1953 | } else { |
| 1954 | op = _rightOp[rule]; |
| 1955 | } |
| 1956 | // Operand type to catch childs result |
| 1957 | // This is what my child will give me. |
| 1958 | int opnd_class_instance = newstate->rule(op); |
| 1959 | // Choose between operand class or not. |
| 1960 | // This is what I will receive. |
| 1961 | int catch_op = (op >= FIRST_OPERAND_CLASS138 && op < NUM_OPERANDS139) ? opnd_class_instance : op; |
| 1962 | // New rule for child. Chase operand classes to get the actual rule. |
| 1963 | int newrule = newstate->rule(catch_op); |
| 1964 | |
| 1965 | if (newrule < NUM_OPERANDS139) { // Operand/operandClass or internalOp/instruction? |
| 1966 | // Operand/operandClass |
| 1967 | // Insert operand into array of operands for this instruction |
| 1968 | mach->_opnds[num_opnds++] = newstate->MachOperGenerator(opnd_class_instance); |
| 1969 | ReduceOper(newstate, newrule, mem, mach); |
| 1970 | |
| 1971 | } else { // Child is internal operand or new instruction |
| 1972 | if (newrule < _LAST_MACH_OPER) { // internal operand or instruction? |
| 1973 | // internal operand --> call ReduceInst_Interior |
| 1974 | // Interior of complex instruction. Do nothing but recurse. |
| 1975 | num_opnds = ReduceInst_Interior(newstate, newrule, mem, mach, num_opnds); |
| 1976 | } else { |
| 1977 | // instruction --> call build operand( ) to catch result |
| 1978 | // --> ReduceInst( newrule ) |
| 1979 | mach->_opnds[num_opnds++] = s->MachOperGenerator(_reduceOp[catch_op]); |
| 1980 | Node *mem1 = (Node*)1; |
| 1981 | debug_only(Node *save_mem_node = _mem_node;)Node *save_mem_node = _mem_node; |
| 1982 | mach->add_req( ReduceInst( newstate, newrule, mem1 ) ); |
| 1983 | debug_only(_mem_node = save_mem_node;)_mem_node = save_mem_node; |
| 1984 | } |
| 1985 | } |
| 1986 | assert( mach->_opnds[num_opnds-1], "" )do { if (!(mach->_opnds[num_opnds-1])) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 1986, "assert(" "mach->_opnds[num_opnds-1]" ") failed", "" ); ::breakpoint(); } } while (0); |
| 1987 | } |
| 1988 | return num_opnds; |
| 1989 | } |
| 1990 | |
| 1991 | // This routine walks the interior of possible complex operands. |
| 1992 | // At each point we check our children in the match tree: |
| 1993 | // (1) No children - |
| 1994 | // We are a leaf; add _leaf field as an input to the MachNode |
| 1995 | // (2) Child is an internal operand - |
| 1996 | // Skip over it ( do nothing ) |
| 1997 | // (3) Child is an instruction - |
| 1998 | // Call ReduceInst recursively and |
| 1999 | // and instruction as an input to the MachNode |
| 2000 | void Matcher::ReduceOper( State *s, int rule, Node *&mem, MachNode *mach ) { |
| 2001 | assert( rule < _LAST_MACH_OPER, "called with operand rule" )do { if (!(rule < _LAST_MACH_OPER)) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 2001, "assert(" "rule < _LAST_MACH_OPER" ") failed", "called with operand rule" ); ::breakpoint(); } } while (0); |
| 2002 | State *kid = s->_kids[0]; |
| 2003 | assert( kid == NULL || s->_leaf->in(0) == NULL, "internal operands have no control" )do { if (!(kid == __null || s->_leaf->in(0) == __null)) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 2003, "assert(" "kid == __null || s->_leaf->in(0) == __null" ") failed", "internal operands have no control"); ::breakpoint (); } } while (0); |
| 2004 | |
| 2005 | // Leaf? And not subsumed? |
| 2006 | if( kid == NULL__null && !_swallowed[rule] ) { |
| 2007 | mach->add_req( s->_leaf ); // Add leaf pointer |
| 2008 | return; // Bail out |
| 2009 | } |
| 2010 | |
| 2011 | if( s->_leaf->is_Load() ) { |
| 2012 | assert( mem == (Node*)1, "multiple Memories being matched at once?" )do { if (!(mem == (Node*)1)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 2012, "assert(" "mem == (Node*)1" ") failed", "multiple Memories being matched at once?" ); ::breakpoint(); } } while (0); |
| 2013 | mem = s->_leaf->in(MemNode::Memory); |
| 2014 | debug_only(_mem_node = s->_leaf;)_mem_node = s->_leaf; |
| 2015 | } |
| 2016 | |
| 2017 | handle_precedence_edges(s->_leaf, mach); |
| 2018 | |
| 2019 | if( s->_leaf->in(0) && s->_leaf->req() > 1) { |
| 2020 | if( !mach->in(0) ) |
| 2021 | mach->set_req(0,s->_leaf->in(0)); |
| 2022 | else { |
| 2023 | assert( s->_leaf->in(0) == mach->in(0), "same instruction, differing controls?" )do { if (!(s->_leaf->in(0) == mach->in(0))) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 2023, "assert(" "s->_leaf->in(0) == mach->in(0)" ") failed" , "same instruction, differing controls?"); ::breakpoint(); } } while (0); |
| 2024 | } |
| 2025 | } |
| 2026 | |
| 2027 | for (uint i = 0; kid != NULL__null && i < 2; kid = s->_kids[1], i++) { // binary tree |
| 2028 | int newrule; |
| 2029 | if( i == 0) { |
| 2030 | newrule = kid->rule(_leftOp[rule]); |
| 2031 | } else { |
| 2032 | newrule = kid->rule(_rightOp[rule]); |
| 2033 | } |
| 2034 | |
| 2035 | if (newrule < _LAST_MACH_OPER) { // Operand or instruction? |
| 2036 | // Internal operand; recurse but do nothing else |
| 2037 | ReduceOper(kid, newrule, mem, mach); |
| 2038 | |
| 2039 | } else { // Child is a new instruction |
| 2040 | // Reduce the instruction, and add a direct pointer from this |
| 2041 | // machine instruction to the newly reduced one. |
| 2042 | Node *mem1 = (Node*)1; |
| 2043 | debug_only(Node *save_mem_node = _mem_node;)Node *save_mem_node = _mem_node; |
| 2044 | mach->add_req( ReduceInst( kid, newrule, mem1 ) ); |
| 2045 | debug_only(_mem_node = save_mem_node;)_mem_node = save_mem_node; |
| 2046 | } |
| 2047 | } |
| 2048 | } |
| 2049 | |
| 2050 | |
| 2051 | // ------------------------------------------------------------------------- |
| 2052 | // Java-Java calling convention |
| 2053 | // (what you use when Java calls Java) |
| 2054 | |
| 2055 | //------------------------------find_receiver---------------------------------- |
| 2056 | // For a given signature, return the OptoReg for parameter 0. |
| 2057 | OptoReg::Name Matcher::find_receiver() { |
| 2058 | VMRegPair regs; |
| 2059 | BasicType sig_bt = T_OBJECT; |
| 2060 | SharedRuntime::java_calling_convention(&sig_bt, ®s, 1); |
| 2061 | // Return argument 0 register. In the LP64 build pointers |
| 2062 | // take 2 registers, but the VM wants only the 'main' name. |
| 2063 | return OptoReg::as_OptoReg(regs.first()); |
| 2064 | } |
| 2065 | |
| 2066 | bool Matcher::is_vshift_con_pattern(Node* n, Node* m) { |
| 2067 | if (n != NULL__null && m != NULL__null) { |
| 2068 | return VectorNode::is_vector_shift(n) && |
| 2069 | VectorNode::is_vector_shift_count(m) && m->in(1)->is_Con(); |
| 2070 | } |
| 2071 | return false; |
| 2072 | } |
| 2073 | |
| 2074 | bool Matcher::clone_node(Node* n, Node* m, Matcher::MStack& mstack) { |
| 2075 | // Must clone all producers of flags, or we will not match correctly. |
| 2076 | // Suppose a compare setting int-flags is shared (e.g., a switch-tree) |
| 2077 | // then it will match into an ideal Op_RegFlags. Alas, the fp-flags |
| 2078 | // are also there, so we may match a float-branch to int-flags and |
| 2079 | // expect the allocator to haul the flags from the int-side to the |
| 2080 | // fp-side. No can do. |
| 2081 | if (_must_clone[m->Opcode()]) { |
| 2082 | mstack.push(m, Visit); |
| 2083 | return true; |
| 2084 | } |
| 2085 | return pd_clone_node(n, m, mstack); |
| 2086 | } |
| 2087 | |
| 2088 | bool Matcher::clone_base_plus_offset_address(AddPNode* m, Matcher::MStack& mstack, VectorSet& address_visited) { |
| 2089 | Node *off = m->in(AddPNode::Offset); |
| 2090 | if (off->is_Con()) { |
| 2091 | address_visited.test_set(m->_idx); // Flag as address_visited |
| 2092 | mstack.push(m->in(AddPNode::Address), Pre_Visit); |
| 2093 | // Clone X+offset as it also folds into most addressing expressions |
| 2094 | mstack.push(off, Visit); |
| 2095 | mstack.push(m->in(AddPNode::Base), Pre_Visit); |
| 2096 | return true; |
| 2097 | } |
| 2098 | return false; |
| 2099 | } |
| 2100 | |
| 2101 | // A method-klass-holder may be passed in the inline_cache_reg |
| 2102 | // and then expanded into the inline_cache_reg and a method_ptr register |
| 2103 | // defined in ad_<arch>.cpp |
| 2104 | |
| 2105 | //------------------------------find_shared------------------------------------ |
| 2106 | // Set bits if Node is shared or otherwise a root |
| 2107 | void Matcher::find_shared(Node* n) { |
| 2108 | // Allocate stack of size C->live_nodes() * 2 to avoid frequent realloc |
| 2109 | MStack mstack(C->live_nodes() * 2); |
| 2110 | // Mark nodes as address_visited if they are inputs to an address expression |
| 2111 | VectorSet address_visited; |
| 2112 | mstack.push(n, Visit); // Don't need to pre-visit root node |
| 2113 | while (mstack.is_nonempty()) { |
| 2114 | n = mstack.node(); // Leave node on stack |
| 2115 | Node_State nstate = mstack.state(); |
| 2116 | uint nop = n->Opcode(); |
| 2117 | if (nstate == Pre_Visit) { |
| 2118 | if (address_visited.test(n->_idx)) { // Visited in address already? |
| 2119 | // Flag as visited and shared now. |
| 2120 | set_visited(n); |
| 2121 | } |
| 2122 | if (is_visited(n)) { // Visited already? |
| 2123 | // Node is shared and has no reason to clone. Flag it as shared. |
| 2124 | // This causes it to match into a register for the sharing. |
| 2125 | set_shared(n); // Flag as shared and |
| 2126 | if (n->is_DecodeNarrowPtr()) { |
| 2127 | // Oop field/array element loads must be shared but since |
| 2128 | // they are shared through a DecodeN they may appear to have |
| 2129 | // a single use so force sharing here. |
| 2130 | set_shared(n->in(1)); |
| 2131 | } |
| 2132 | mstack.pop(); // remove node from stack |
| 2133 | continue; |
| 2134 | } |
| 2135 | nstate = Visit; // Not already visited; so visit now |
| 2136 | } |
| 2137 | if (nstate == Visit) { |
| 2138 | mstack.set_state(Post_Visit); |
| 2139 | set_visited(n); // Flag as visited now |
| 2140 | bool mem_op = false; |
| 2141 | int mem_addr_idx = MemNode::Address; |
| 2142 | if (find_shared_visit(mstack, n, nop, mem_op, mem_addr_idx)) { |
| 2143 | continue; |
| 2144 | } |
| 2145 | for (int i = n->req() - 1; i >= 0; --i) { // For my children |
| 2146 | Node* m = n->in(i); // Get ith input |
| 2147 | if (m == NULL__null) { |
| 2148 | continue; // Ignore NULLs |
| 2149 | } |
| 2150 | if (clone_node(n, m, mstack)) { |
| 2151 | continue; |
| 2152 | } |
| 2153 | |
| 2154 | // Clone addressing expressions as they are "free" in memory access instructions |
| 2155 | if (mem_op && i == mem_addr_idx && m->is_AddP() && |
| 2156 | // When there are other uses besides address expressions |
| 2157 | // put it on stack and mark as shared. |
| 2158 | !is_visited(m)) { |
| 2159 | // Some inputs for address expression are not put on stack |
| 2160 | // to avoid marking them as shared and forcing them into register |
| 2161 | // if they are used only in address expressions. |
| 2162 | // But they should be marked as shared if there are other uses |
| 2163 | // besides address expressions. |
| 2164 | |
| 2165 | if (pd_clone_address_expressions(m->as_AddP(), mstack, address_visited)) { |
| 2166 | continue; |
| 2167 | } |
| 2168 | } // if( mem_op && |
| 2169 | mstack.push(m, Pre_Visit); |
| 2170 | } // for(int i = ...) |
| 2171 | } |
| 2172 | else if (nstate == Alt_Post_Visit) { |
| 2173 | mstack.pop(); // Remove node from stack |
| 2174 | // We cannot remove the Cmp input from the Bool here, as the Bool may be |
| 2175 | // shared and all users of the Bool need to move the Cmp in parallel. |
| 2176 | // This leaves both the Bool and the If pointing at the Cmp. To |
| 2177 | // prevent the Matcher from trying to Match the Cmp along both paths |
| 2178 | // BoolNode::match_edge always returns a zero. |
| 2179 | |
| 2180 | // We reorder the Op_If in a pre-order manner, so we can visit without |
| 2181 | // accidentally sharing the Cmp (the Bool and the If make 2 users). |
| 2182 | n->add_req( n->in(1)->in(1) ); // Add the Cmp next to the Bool |
| 2183 | } |
| 2184 | else if (nstate == Post_Visit) { |
| 2185 | mstack.pop(); // Remove node from stack |
| 2186 | |
| 2187 | // Now hack a few special opcodes |
| 2188 | uint opcode = n->Opcode(); |
| 2189 | bool gc_handled = BarrierSet::barrier_set()->barrier_set_c2()->matcher_find_shared_post_visit(this, n, opcode); |
| 2190 | if (!gc_handled) { |
| 2191 | find_shared_post_visit(n, opcode); |
| 2192 | } |
| 2193 | } |
| 2194 | else { |
| 2195 | ShouldNotReachHere()do { (*g_assert_poison) = 'X';; report_should_not_reach_here( "/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 2195); ::breakpoint(); } while (0); |
| 2196 | } |
| 2197 | } // end of while (mstack.is_nonempty()) |
| 2198 | } |
| 2199 | |
| 2200 | bool Matcher::find_shared_visit(MStack& mstack, Node* n, uint opcode, bool& mem_op, int& mem_addr_idx) { |
| 2201 | switch(opcode) { // Handle some opcodes special |
| 2202 | case Op_Phi: // Treat Phis as shared roots |
| 2203 | case Op_Parm: |
| 2204 | case Op_Proj: // All handled specially during matching |
| 2205 | case Op_SafePointScalarObject: |
| 2206 | set_shared(n); |
| 2207 | set_dontcare(n); |
| 2208 | break; |
| 2209 | case Op_If: |
| 2210 | case Op_CountedLoopEnd: |
| 2211 | mstack.set_state(Alt_Post_Visit); // Alternative way |
| 2212 | // Convert (If (Bool (CmpX A B))) into (If (Bool) (CmpX A B)). Helps |
| 2213 | // with matching cmp/branch in 1 instruction. The Matcher needs the |
| 2214 | // Bool and CmpX side-by-side, because it can only get at constants |
| 2215 | // that are at the leaves of Match trees, and the Bool's condition acts |
| 2216 | // as a constant here. |
| 2217 | mstack.push(n->in(1), Visit); // Clone the Bool |
| 2218 | mstack.push(n->in(0), Pre_Visit); // Visit control input |
| 2219 | return true; // while (mstack.is_nonempty()) |
| 2220 | case Op_ConvI2D: // These forms efficiently match with a prior |
| 2221 | case Op_ConvI2F: // Load but not a following Store |
| 2222 | if( n->in(1)->is_Load() && // Prior load |
| 2223 | n->outcnt() == 1 && // Not already shared |
| 2224 | n->unique_out()->is_Store() ) // Following store |
| 2225 | set_shared(n); // Force it to be a root |
| 2226 | break; |
| 2227 | case Op_ReverseBytesI: |
| 2228 | case Op_ReverseBytesL: |
| 2229 | if( n->in(1)->is_Load() && // Prior load |
| 2230 | n->outcnt() == 1 ) // Not already shared |
| 2231 | set_shared(n); // Force it to be a root |
| 2232 | break; |
| 2233 | case Op_BoxLock: // Cant match until we get stack-regs in ADLC |
| 2234 | case Op_IfFalse: |
| 2235 | case Op_IfTrue: |
| 2236 | case Op_MachProj: |
| 2237 | case Op_MergeMem: |
| 2238 | case Op_Catch: |
| 2239 | case Op_CatchProj: |
| 2240 | case Op_CProj: |
| 2241 | case Op_JumpProj: |
| 2242 | case Op_JProj: |
| 2243 | case Op_NeverBranch: |
| 2244 | set_dontcare(n); |
| 2245 | break; |
| 2246 | case Op_Jump: |
| 2247 | mstack.push(n->in(1), Pre_Visit); // Switch Value (could be shared) |
| 2248 | mstack.push(n->in(0), Pre_Visit); // Visit Control input |
| 2249 | return true; // while (mstack.is_nonempty()) |
| 2250 | case Op_StrComp: |
| 2251 | case Op_StrEquals: |
| 2252 | case Op_StrIndexOf: |
| 2253 | case Op_StrIndexOfChar: |
| 2254 | case Op_AryEq: |
| 2255 | case Op_HasNegatives: |
| 2256 | case Op_StrInflatedCopy: |
| 2257 | case Op_StrCompressedCopy: |
| 2258 | case Op_EncodeISOArray: |
| 2259 | case Op_FmaD: |
| 2260 | case Op_FmaF: |
| 2261 | case Op_FmaVD: |
| 2262 | case Op_FmaVF: |
| 2263 | case Op_MacroLogicV: |
| 2264 | case Op_LoadVectorMasked: |
| 2265 | case Op_VectorCmpMasked: |
| 2266 | case Op_VectorLoadMask: |
| 2267 | set_shared(n); // Force result into register (it will be anyways) |
| 2268 | break; |
| 2269 | case Op_ConP: { // Convert pointers above the centerline to NUL |
| 2270 | TypeNode *tn = n->as_Type(); // Constants derive from type nodes |
| 2271 | const TypePtr* tp = tn->type()->is_ptr(); |
| 2272 | if (tp->_ptr == TypePtr::AnyNull) { |
| 2273 | tn->set_type(TypePtr::NULL_PTR); |
| 2274 | } |
| 2275 | break; |
| 2276 | } |
| 2277 | case Op_ConN: { // Convert narrow pointers above the centerline to NUL |
| 2278 | TypeNode *tn = n->as_Type(); // Constants derive from type nodes |
| 2279 | const TypePtr* tp = tn->type()->make_ptr(); |
| 2280 | if (tp && tp->_ptr == TypePtr::AnyNull) { |
| 2281 | tn->set_type(TypeNarrowOop::NULL_PTR); |
| 2282 | } |
| 2283 | break; |
| 2284 | } |
| 2285 | case Op_Binary: // These are introduced in the Post_Visit state. |
| 2286 | ShouldNotReachHere()do { (*g_assert_poison) = 'X';; report_should_not_reach_here( "/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 2286); ::breakpoint(); } while (0); |
| 2287 | break; |
| 2288 | case Op_ClearArray: |
| 2289 | case Op_SafePoint: |
| 2290 | mem_op = true; |
| 2291 | break; |
| 2292 | default: |
| 2293 | if( n->is_Store() ) { |
| 2294 | // Do match stores, despite no ideal reg |
| 2295 | mem_op = true; |
| 2296 | break; |
| 2297 | } |
| 2298 | if( n->is_Mem() ) { // Loads and LoadStores |
| 2299 | mem_op = true; |
| 2300 | // Loads must be root of match tree due to prior load conflict |
| 2301 | if( C->subsume_loads() == false ) |
| 2302 | set_shared(n); |
| 2303 | } |
| 2304 | // Fall into default case |
| 2305 | if( !n->ideal_reg() ) |
| 2306 | set_dontcare(n); // Unmatchable Nodes |
| 2307 | } // end_switch |
| 2308 | return false; |
| 2309 | } |
| 2310 | |
| 2311 | void Matcher::find_shared_post_visit(Node* n, uint opcode) { |
| 2312 | if (n->is_predicated_vector()) { |
| 2313 | // Restructure into binary trees for Matching. |
| 2314 | if (n->req() == 4) { |
| 2315 | n->set_req(1, new BinaryNode(n->in(1), n->in(2))); |
| 2316 | n->set_req(2, n->in(3)); |
| 2317 | n->del_req(3); |
| 2318 | } else if (n->req() == 5) { |
| 2319 | n->set_req(1, new BinaryNode(n->in(1), n->in(2))); |
| 2320 | n->set_req(2, new BinaryNode(n->in(3), n->in(4))); |
| 2321 | n->del_req(4); |
| 2322 | n->del_req(3); |
| 2323 | } |
| 2324 | return; |
| 2325 | } |
| 2326 | |
| 2327 | switch(opcode) { // Handle some opcodes special |
| 2328 | case Op_StorePConditional: |
| 2329 | case Op_StoreIConditional: |
| 2330 | case Op_StoreLConditional: |
| 2331 | case Op_CompareAndExchangeB: |
| 2332 | case Op_CompareAndExchangeS: |
| 2333 | case Op_CompareAndExchangeI: |
| 2334 | case Op_CompareAndExchangeL: |
| 2335 | case Op_CompareAndExchangeP: |
| 2336 | case Op_CompareAndExchangeN: |
| 2337 | case Op_WeakCompareAndSwapB: |
| 2338 | case Op_WeakCompareAndSwapS: |
| 2339 | case Op_WeakCompareAndSwapI: |
| 2340 | case Op_WeakCompareAndSwapL: |
| 2341 | case Op_WeakCompareAndSwapP: |
| 2342 | case Op_WeakCompareAndSwapN: |
| 2343 | case Op_CompareAndSwapB: |
| 2344 | case Op_CompareAndSwapS: |
| 2345 | case Op_CompareAndSwapI: |
| 2346 | case Op_CompareAndSwapL: |
| 2347 | case Op_CompareAndSwapP: |
| 2348 | case Op_CompareAndSwapN: { // Convert trinary to binary-tree |
| 2349 | Node* newval = n->in(MemNode::ValueIn); |
| 2350 | Node* oldval = n->in(LoadStoreConditionalNode::ExpectedIn); |
| 2351 | Node* pair = new BinaryNode(oldval, newval); |
| 2352 | n->set_req(MemNode::ValueIn, pair); |
| 2353 | n->del_req(LoadStoreConditionalNode::ExpectedIn); |
| 2354 | break; |
| 2355 | } |
| 2356 | case Op_CMoveD: // Convert trinary to binary-tree |
| 2357 | case Op_CMoveF: |
| 2358 | case Op_CMoveI: |
| 2359 | case Op_CMoveL: |
| 2360 | case Op_CMoveN: |
| 2361 | case Op_CMoveP: |
| 2362 | case Op_CMoveVF: |
| 2363 | case Op_CMoveVD: { |
| 2364 | // Restructure into a binary tree for Matching. It's possible that |
| 2365 | // we could move this code up next to the graph reshaping for IfNodes |
| 2366 | // or vice-versa, but I do not want to debug this for Ladybird. |
| 2367 | // 10/2/2000 CNC. |
| 2368 | Node* pair1 = new BinaryNode(n->in(1), n->in(1)->in(1)); |
| 2369 | n->set_req(1, pair1); |
| 2370 | Node* pair2 = new BinaryNode(n->in(2), n->in(3)); |
| 2371 | n->set_req(2, pair2); |
| 2372 | n->del_req(3); |
| 2373 | break; |
| 2374 | } |
| 2375 | case Op_VectorCmpMasked: { |
| 2376 | Node* pair1 = new BinaryNode(n->in(2), n->in(3)); |
| 2377 | n->set_req(2, pair1); |
| 2378 | n->del_req(3); |
| 2379 | break; |
| 2380 | } |
| 2381 | case Op_MacroLogicV: { |
| 2382 | Node* pair1 = new BinaryNode(n->in(1), n->in(2)); |
| 2383 | Node* pair2 = new BinaryNode(n->in(3), n->in(4)); |
| 2384 | n->set_req(1, pair1); |
| 2385 | n->set_req(2, pair2); |
| 2386 | n->del_req(4); |
| 2387 | n->del_req(3); |
| 2388 | break; |
| 2389 | } |
| 2390 | case Op_StoreVectorMasked: { |
| 2391 | Node* pair = new BinaryNode(n->in(3), n->in(4)); |
| 2392 | n->set_req(3, pair); |
| 2393 | n->del_req(4); |
| 2394 | break; |
| 2395 | } |
| 2396 | case Op_LoopLimit: { |
| 2397 | Node* pair1 = new BinaryNode(n->in(1), n->in(2)); |
| 2398 | n->set_req(1, pair1); |
| 2399 | n->set_req(2, n->in(3)); |
| 2400 | n->del_req(3); |
| 2401 | break; |
| 2402 | } |
| 2403 | case Op_StrEquals: |
| 2404 | case Op_StrIndexOfChar: { |
| 2405 | Node* pair1 = new BinaryNode(n->in(2), n->in(3)); |
| 2406 | n->set_req(2, pair1); |
| 2407 | n->set_req(3, n->in(4)); |
| 2408 | n->del_req(4); |
| 2409 | break; |
| 2410 | } |
| 2411 | case Op_StrComp: |
| 2412 | case Op_StrIndexOf: { |
| 2413 | Node* pair1 = new BinaryNode(n->in(2), n->in(3)); |
| 2414 | n->set_req(2, pair1); |
| 2415 | Node* pair2 = new BinaryNode(n->in(4),n->in(5)); |
| 2416 | n->set_req(3, pair2); |
| 2417 | n->del_req(5); |
| 2418 | n->del_req(4); |
| 2419 | break; |
| 2420 | } |
| 2421 | case Op_StrCompressedCopy: |
| 2422 | case Op_StrInflatedCopy: |
| 2423 | case Op_EncodeISOArray: { |
| 2424 | // Restructure into a binary tree for Matching. |
| 2425 | Node* pair = new BinaryNode(n->in(3), n->in(4)); |
| 2426 | n->set_req(3, pair); |
| 2427 | n->del_req(4); |
| 2428 | break; |
| 2429 | } |
| 2430 | case Op_FmaD: |
| 2431 | case Op_FmaF: |
| 2432 | case Op_FmaVD: |
| 2433 | case Op_FmaVF: { |
| 2434 | // Restructure into a binary tree for Matching. |
| 2435 | Node* pair = new BinaryNode(n->in(1), n->in(2)); |
| 2436 | n->set_req(2, pair); |
| 2437 | n->set_req(1, n->in(3)); |
| 2438 | n->del_req(3); |
| 2439 | break; |
| 2440 | } |
| 2441 | case Op_MulAddS2I: { |
| 2442 | Node* pair1 = new BinaryNode(n->in(1), n->in(2)); |
| 2443 | Node* pair2 = new BinaryNode(n->in(3), n->in(4)); |
| 2444 | n->set_req(1, pair1); |
| 2445 | n->set_req(2, pair2); |
| 2446 | n->del_req(4); |
| 2447 | n->del_req(3); |
| 2448 | break; |
| 2449 | } |
| 2450 | case Op_CopySignD: |
| 2451 | case Op_SignumF: |
| 2452 | case Op_SignumD: { |
| 2453 | Node* pair = new BinaryNode(n->in(2), n->in(3)); |
| 2454 | n->set_req(2, pair); |
| 2455 | n->del_req(3); |
| 2456 | break; |
| 2457 | } |
| 2458 | case Op_VectorBlend: |
| 2459 | case Op_VectorInsert: { |
| 2460 | Node* pair = new BinaryNode(n->in(1), n->in(2)); |
| 2461 | n->set_req(1, pair); |
| 2462 | n->set_req(2, n->in(3)); |
| 2463 | n->del_req(3); |
| 2464 | break; |
| 2465 | } |
| 2466 | case Op_LoadVectorGatherMasked: |
| 2467 | case Op_StoreVectorScatter: { |
| 2468 | Node* pair = new BinaryNode(n->in(MemNode::ValueIn), n->in(MemNode::ValueIn+1)); |
| 2469 | n->set_req(MemNode::ValueIn, pair); |
| 2470 | n->del_req(MemNode::ValueIn+1); |
| 2471 | break; |
| 2472 | } |
| 2473 | case Op_StoreVectorScatterMasked: { |
| 2474 | Node* pair = new BinaryNode(n->in(MemNode::ValueIn+1), n->in(MemNode::ValueIn+2)); |
| 2475 | n->set_req(MemNode::ValueIn+1, pair); |
| 2476 | n->del_req(MemNode::ValueIn+2); |
| 2477 | pair = new BinaryNode(n->in(MemNode::ValueIn), n->in(MemNode::ValueIn+1)); |
| 2478 | n->set_req(MemNode::ValueIn, pair); |
| 2479 | n->del_req(MemNode::ValueIn+1); |
| 2480 | break; |
| 2481 | } |
| 2482 | case Op_VectorMaskCmp: { |
| 2483 | n->set_req(1, new BinaryNode(n->in(1), n->in(2))); |
| 2484 | n->set_req(2, n->in(3)); |
| 2485 | n->del_req(3); |
| 2486 | break; |
| 2487 | } |
| 2488 | default: |
| 2489 | break; |
| 2490 | } |
| 2491 | } |
| 2492 | |
| 2493 | #ifndef PRODUCT |
| 2494 | void Matcher::record_new2old(Node* newn, Node* old) { |
| 2495 | _new2old_map.map(newn->_idx, old); |
| 2496 | if (!_reused.test_set(old->_igv_idx)) { |
| 2497 | // Reuse the Ideal-level IGV identifier so that the node can be tracked |
| 2498 | // across matching. If there are multiple machine nodes expanded from the |
| 2499 | // same Ideal node, only one will reuse its IGV identifier. |
| 2500 | newn->_igv_idx = old->_igv_idx; |
| 2501 | } |
| 2502 | } |
| 2503 | |
| 2504 | // machine-independent root to machine-dependent root |
| 2505 | void Matcher::dump_old2new_map() { |
| 2506 | _old2new_map.dump(); |
| 2507 | } |
| 2508 | #endif // !PRODUCT |
| 2509 | |
| 2510 | //---------------------------collect_null_checks------------------------------- |
| 2511 | // Find null checks in the ideal graph; write a machine-specific node for |
| 2512 | // it. Used by later implicit-null-check handling. Actually collects |
| 2513 | // either an IfTrue or IfFalse for the common NOT-null path, AND the ideal |
| 2514 | // value being tested. |
| 2515 | void Matcher::collect_null_checks( Node *proj, Node *orig_proj ) { |
| 2516 | Node *iff = proj->in(0); |
| 2517 | if( iff->Opcode() == Op_If ) { |
| 2518 | // During matching If's have Bool & Cmp side-by-side |
| 2519 | BoolNode *b = iff->in(1)->as_Bool(); |
| 2520 | Node *cmp = iff->in(2); |
| 2521 | int opc = cmp->Opcode(); |
| 2522 | if (opc != Op_CmpP && opc != Op_CmpN) return; |
| 2523 | |
| 2524 | const Type* ct = cmp->in(2)->bottom_type(); |
| 2525 | if (ct == TypePtr::NULL_PTR || |
| 2526 | (opc == Op_CmpN && ct == TypeNarrowOop::NULL_PTR)) { |
| 2527 | |
| 2528 | bool push_it = false; |
| 2529 | if( proj->Opcode() == Op_IfTrue ) { |
| 2530 | #ifndef PRODUCT |
| 2531 | extern int all_null_checks_found; |
| 2532 | all_null_checks_found++; |
| 2533 | #endif |
| 2534 | if( b->_test._test == BoolTest::ne ) { |
| 2535 | push_it = true; |
| 2536 | } |
| 2537 | } else { |
| 2538 | assert( proj->Opcode() == Op_IfFalse, "" )do { if (!(proj->Opcode() == Op_IfFalse)) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 2538, "assert(" "proj->Opcode() == Op_IfFalse" ") failed" , ""); ::breakpoint(); } } while (0); |
| 2539 | if( b->_test._test == BoolTest::eq ) { |
| 2540 | push_it = true; |
| 2541 | } |
| 2542 | } |
| 2543 | if( push_it ) { |
| 2544 | _null_check_tests.push(proj); |
| 2545 | Node* val = cmp->in(1); |
| 2546 | #ifdef _LP641 |
| 2547 | if (val->bottom_type()->isa_narrowoop() && |
| 2548 | !Matcher::narrow_oop_use_complex_address()) { |
| 2549 | // |
| 2550 | // Look for DecodeN node which should be pinned to orig_proj. |
| 2551 | // On platforms (Sparc) which can not handle 2 adds |
| 2552 | // in addressing mode we have to keep a DecodeN node and |
| 2553 | // use it to do implicit NULL check in address. |
| 2554 | // |
| 2555 | // DecodeN node was pinned to non-null path (orig_proj) during |
| 2556 | // CastPP transformation in final_graph_reshaping_impl(). |
| 2557 | // |
| 2558 | uint cnt = orig_proj->outcnt(); |
| 2559 | for (uint i = 0; i < orig_proj->outcnt(); i++) { |
| 2560 | Node* d = orig_proj->raw_out(i); |
| 2561 | if (d->is_DecodeN() && d->in(1) == val) { |
| 2562 | val = d; |
| 2563 | val->set_req(0, NULL__null); // Unpin now. |
| 2564 | // Mark this as special case to distinguish from |
| 2565 | // a regular case: CmpP(DecodeN, NULL). |
| 2566 | val = (Node*)(((intptr_t)val) | 1); |
| 2567 | break; |
| 2568 | } |
| 2569 | } |
| 2570 | } |
| 2571 | #endif |
| 2572 | _null_check_tests.push(val); |
| 2573 | } |
| 2574 | } |
| 2575 | } |
| 2576 | } |
| 2577 | |
| 2578 | //---------------------------validate_null_checks------------------------------ |
| 2579 | // Its possible that the value being NULL checked is not the root of a match |
| 2580 | // tree. If so, I cannot use the value in an implicit null check. |
| 2581 | void Matcher::validate_null_checks( ) { |
| 2582 | uint cnt = _null_check_tests.size(); |
| 2583 | for( uint i=0; i < cnt; i+=2 ) { |
| 2584 | Node *test = _null_check_tests[i]; |
| 2585 | Node *val = _null_check_tests[i+1]; |
| 2586 | bool is_decoden = ((intptr_t)val) & 1; |
| 2587 | val = (Node*)(((intptr_t)val) & ~1); |
| 2588 | if (has_new_node(val)) { |
| 2589 | Node* new_val = new_node(val); |
| 2590 | if (is_decoden) { |
| 2591 | assert(val->is_DecodeNarrowPtr() && val->in(0) == NULL, "sanity")do { if (!(val->is_DecodeNarrowPtr() && val->in (0) == __null)) { (*g_assert_poison) = 'X';; report_vm_error( "/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 2591, "assert(" "val->is_DecodeNarrowPtr() && val->in(0) == __null" ") failed", "sanity"); ::breakpoint(); } } while (0); |
| 2592 | // Note: new_val may have a control edge if |
| 2593 | // the original ideal node DecodeN was matched before |
| 2594 | // it was unpinned in Matcher::collect_null_checks(). |
| 2595 | // Unpin the mach node and mark it. |
| 2596 | new_val->set_req(0, NULL__null); |
| 2597 | new_val = (Node*)(((intptr_t)new_val) | 1); |
| 2598 | } |
| 2599 | // Is a match-tree root, so replace with the matched value |
| 2600 | _null_check_tests.map(i+1, new_val); |
| 2601 | } else { |
| 2602 | // Yank from candidate list |
| 2603 | _null_check_tests.map(i+1,_null_check_tests[--cnt]); |
| 2604 | _null_check_tests.map(i,_null_check_tests[--cnt]); |
| 2605 | _null_check_tests.pop(); |
| 2606 | _null_check_tests.pop(); |
| 2607 | i-=2; |
| 2608 | } |
| 2609 | } |
| 2610 | } |
| 2611 | |
| 2612 | bool Matcher::gen_narrow_oop_implicit_null_checks() { |
| 2613 | // Advice matcher to perform null checks on the narrow oop side. |
| 2614 | // Implicit checks are not possible on the uncompressed oop side anyway |
| 2615 | // (at least not for read accesses). |
| 2616 | // Performs significantly better (especially on Power 6). |
| 2617 | if (!os::zero_page_read_protected()) { |
| 2618 | return true; |
| 2619 | } |
| 2620 | return CompressedOops::use_implicit_null_checks() && |
| 2621 | (narrow_oop_use_complex_address() || |
| 2622 | CompressedOops::base() != NULL__null); |
| 2623 | } |
| 2624 | |
| 2625 | // Compute RegMask for an ideal register. |
| 2626 | const RegMask* Matcher::regmask_for_ideal_register(uint ideal_reg, Node* ret) { |
| 2627 | const Type* t = Type::mreg2type[ideal_reg]; |
| 2628 | if (t == NULL__null) { |
| 2629 | assert(ideal_reg >= Op_VecA && ideal_reg <= Op_VecZ, "not a vector: %d", ideal_reg)do { if (!(ideal_reg >= Op_VecA && ideal_reg <= Op_VecZ)) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 2629, "assert(" "ideal_reg >= Op_VecA && ideal_reg <= Op_VecZ" ") failed", "not a vector: %d", ideal_reg); ::breakpoint(); } } while (0); |
| 2630 | return NULL__null; // not supported |
| 2631 | } |
| 2632 | Node* fp = ret->in(TypeFunc::FramePtr); |
| 2633 | Node* mem = ret->in(TypeFunc::Memory); |
| 2634 | const TypePtr* atp = TypePtr::BOTTOM; |
| 2635 | MemNode::MemOrd mo = MemNode::unordered; |
| 2636 | |
| 2637 | Node* spill; |
| 2638 | switch (ideal_reg) { |
| 2639 | case Op_RegN: spill = new LoadNNode(NULL__null, mem, fp, atp, t->is_narrowoop(), mo); break; |
| 2640 | case Op_RegI: spill = new LoadINode(NULL__null, mem, fp, atp, t->is_int(), mo); break; |
| 2641 | case Op_RegP: spill = new LoadPNode(NULL__null, mem, fp, atp, t->is_ptr(), mo); break; |
| 2642 | case Op_RegF: spill = new LoadFNode(NULL__null, mem, fp, atp, t, mo); break; |
| 2643 | case Op_RegD: spill = new LoadDNode(NULL__null, mem, fp, atp, t, mo); break; |
| 2644 | case Op_RegL: spill = new LoadLNode(NULL__null, mem, fp, atp, t->is_long(), mo); break; |
| 2645 | |
| 2646 | case Op_VecA: // fall-through |
| 2647 | case Op_VecS: // fall-through |
| 2648 | case Op_VecD: // fall-through |
| 2649 | case Op_VecX: // fall-through |
| 2650 | case Op_VecY: // fall-through |
| 2651 | case Op_VecZ: spill = new LoadVectorNode(NULL__null, mem, fp, atp, t->is_vect()); break; |
| 2652 | case Op_RegVectMask: return Matcher::predicate_reg_mask(); |
| 2653 | |
| 2654 | default: ShouldNotReachHere()do { (*g_assert_poison) = 'X';; report_should_not_reach_here( "/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 2654); ::breakpoint(); } while (0); |
| 2655 | } |
| 2656 | MachNode* mspill = match_tree(spill); |
| 2657 | assert(mspill != NULL, "matching failed: %d", ideal_reg)do { if (!(mspill != __null)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 2657, "assert(" "mspill != __null" ") failed", "matching failed: %d" , ideal_reg); ::breakpoint(); } } while (0); |
| 2658 | // Handle generic vector operand case |
| 2659 | if (Matcher::supports_generic_vector_operands && t->isa_vect()) { |
| 2660 | specialize_mach_node(mspill); |
| 2661 | } |
| 2662 | return &mspill->out_RegMask(); |
| 2663 | } |
| 2664 | |
| 2665 | // Process Mach IR right after selection phase is over. |
| 2666 | void Matcher::do_postselect_cleanup() { |
| 2667 | if (supports_generic_vector_operands) { |
| 2668 | specialize_generic_vector_operands(); |
| 2669 | if (C->failing()) return; |
| 2670 | } |
| 2671 | } |
| 2672 | |
| 2673 | //---------------------------------------------------------------------- |
| 2674 | // Generic machine operands elision. |
| 2675 | //---------------------------------------------------------------------- |
| 2676 | |
| 2677 | // Compute concrete vector operand for a generic TEMP vector mach node based on its user info. |
| 2678 | void Matcher::specialize_temp_node(MachTempNode* tmp, MachNode* use, uint idx) { |
| 2679 | assert(use->in(idx) == tmp, "not a user")do { if (!(use->in(idx) == tmp)) { (*g_assert_poison) = 'X' ;; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 2679, "assert(" "use->in(idx) == tmp" ") failed", "not a user" ); ::breakpoint(); } } while (0); |
| 2680 | assert(!Matcher::is_generic_vector(use->_opnds[0]), "use not processed yet")do { if (!(!Matcher::is_generic_vector(use->_opnds[0]))) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 2680, "assert(" "!Matcher::is_generic_vector(use->_opnds[0])" ") failed", "use not processed yet"); ::breakpoint(); } } while (0); |
| 2681 | |
| 2682 | if ((uint)idx == use->two_adr()) { // DEF_TEMP case |
| 2683 | tmp->_opnds[0] = use->_opnds[0]->clone(); |
| 2684 | } else { |
| 2685 | uint ideal_vreg = vector_ideal_reg(C->max_vector_size()); |
| 2686 | tmp->_opnds[0] = Matcher::pd_specialize_generic_vector_operand(tmp->_opnds[0], ideal_vreg, true /*is_temp*/); |
| 2687 | } |
| 2688 | } |
| 2689 | |
| 2690 | // Compute concrete vector operand for a generic DEF/USE vector operand (of mach node m at index idx). |
| 2691 | MachOper* Matcher::specialize_vector_operand(MachNode* m, uint opnd_idx) { |
| 2692 | assert(Matcher::is_generic_vector(m->_opnds[opnd_idx]), "repeated updates")do { if (!(Matcher::is_generic_vector(m->_opnds[opnd_idx]) )) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 2692, "assert(" "Matcher::is_generic_vector(m->_opnds[opnd_idx])" ") failed", "repeated updates"); ::breakpoint(); } } while ( 0); |
| 2693 | Node* def = NULL__null; |
| 2694 | if (opnd_idx == 0) { // DEF |
| 2695 | def = m; // use mach node itself to compute vector operand type |
| 2696 | } else { |
| 2697 | int base_idx = m->operand_index(opnd_idx); |
| 2698 | def = m->in(base_idx); |
| 2699 | if (def->is_Mach()) { |
| 2700 | if (def->is_MachTemp() && Matcher::is_generic_vector(def->as_Mach()->_opnds[0])) { |
| 2701 | specialize_temp_node(def->as_MachTemp(), m, base_idx); // MachTemp node use site |
| 2702 | } else if (is_reg2reg_move(def->as_Mach())) { |
| 2703 | def = def->in(1); // skip over generic reg-to-reg moves |
| 2704 | } |
| 2705 | } |
| 2706 | } |
| 2707 | assert(def->bottom_type()->isa_vect(), "not a vector")do { if (!(def->bottom_type()->isa_vect())) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 2707, "assert(" "def->bottom_type()->isa_vect()" ") failed" , "not a vector"); ::breakpoint(); } } while (0); |
| 2708 | uint ideal_vreg = def->bottom_type()->ideal_reg(); |
| 2709 | return Matcher::pd_specialize_generic_vector_operand(m->_opnds[opnd_idx], ideal_vreg, false /*is_temp*/); |
| 2710 | } |
| 2711 | |
| 2712 | void Matcher::specialize_mach_node(MachNode* m) { |
| 2713 | assert(!m->is_MachTemp(), "processed along with its user")do { if (!(!m->is_MachTemp())) { (*g_assert_poison) = 'X'; ; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 2713, "assert(" "!m->is_MachTemp()" ") failed", "processed along with its user" ); ::breakpoint(); } } while (0); |
| 2714 | // For generic use operands pull specific register class operands from |
| 2715 | // its def instruction's output operand (def operand). |
| 2716 | for (uint i = 0; i < m->num_opnds(); i++) { |
| 2717 | if (Matcher::is_generic_vector(m->_opnds[i])) { |
| 2718 | m->_opnds[i] = specialize_vector_operand(m, i); |
| 2719 | } |
| 2720 | } |
| 2721 | } |
| 2722 | |
| 2723 | // Replace generic vector operands with concrete vector operands and eliminate generic reg-to-reg moves from the graph. |
| 2724 | void Matcher::specialize_generic_vector_operands() { |
| 2725 | assert(supports_generic_vector_operands, "sanity")do { if (!(supports_generic_vector_operands)) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 2725, "assert(" "supports_generic_vector_operands" ") failed" , "sanity"); ::breakpoint(); } } while (0); |
| 2726 | ResourceMark rm; |
| 2727 | |
| 2728 | // Replace generic vector operands (vec/legVec) with concrete ones (vec[SDXYZ]/legVec[SDXYZ]) |
| 2729 | // and remove reg-to-reg vector moves (MoveVec2Leg and MoveLeg2Vec). |
| 2730 | Unique_Node_List live_nodes; |
| 2731 | C->identify_useful_nodes(live_nodes); |
| 2732 | |
| 2733 | while (live_nodes.size() > 0) { |
| 2734 | MachNode* m = live_nodes.pop()->isa_Mach(); |
| 2735 | if (m != NULL__null) { |
| 2736 | if (Matcher::is_reg2reg_move(m)) { |
| 2737 | // Register allocator properly handles vec <=> leg moves using register masks. |
| 2738 | int opnd_idx = m->operand_index(1); |
| 2739 | Node* def = m->in(opnd_idx); |
| 2740 | m->subsume_by(def, C); |
| 2741 | } else if (m->is_MachTemp()) { |
| 2742 | // process MachTemp nodes at use site (see Matcher::specialize_vector_operand) |
| 2743 | } else { |
| 2744 | specialize_mach_node(m); |
| 2745 | } |
| 2746 | } |
| 2747 | } |
| 2748 | } |
| 2749 | |
| 2750 | uint Matcher::vector_length(const Node* n) { |
| 2751 | const TypeVect* vt = n->bottom_type()->is_vect(); |
| 2752 | return vt->length(); |
| 2753 | } |
| 2754 | |
| 2755 | uint Matcher::vector_length(const MachNode* use, const MachOper* opnd) { |
| 2756 | int def_idx = use->operand_index(opnd); |
| 2757 | Node* def = use->in(def_idx); |
| 2758 | return def->bottom_type()->is_vect()->length(); |
| 2759 | } |
| 2760 | |
| 2761 | uint Matcher::vector_length_in_bytes(const Node* n) { |
| 2762 | const TypeVect* vt = n->bottom_type()->is_vect(); |
| 2763 | return vt->length_in_bytes(); |
| 2764 | } |
| 2765 | |
| 2766 | uint Matcher::vector_length_in_bytes(const MachNode* use, const MachOper* opnd) { |
| 2767 | uint def_idx = use->operand_index(opnd); |
| 2768 | Node* def = use->in(def_idx); |
| 2769 | return def->bottom_type()->is_vect()->length_in_bytes(); |
| 2770 | } |
| 2771 | |
| 2772 | BasicType Matcher::vector_element_basic_type(const Node* n) { |
| 2773 | const TypeVect* vt = n->bottom_type()->is_vect(); |
| 2774 | return vt->element_basic_type(); |
| 2775 | } |
| 2776 | |
| 2777 | BasicType Matcher::vector_element_basic_type(const MachNode* use, const MachOper* opnd) { |
| 2778 | int def_idx = use->operand_index(opnd); |
| 2779 | Node* def = use->in(def_idx); |
| 2780 | return def->bottom_type()->is_vect()->element_basic_type(); |
| 2781 | } |
| 2782 | |
| 2783 | #ifdef ASSERT1 |
| 2784 | bool Matcher::verify_after_postselect_cleanup() { |
| 2785 | assert(!C->failing(), "sanity")do { if (!(!C->failing())) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 2785, "assert(" "!C->failing()" ") failed", "sanity"); :: breakpoint(); } } while (0); |
| 2786 | if (supports_generic_vector_operands) { |
| 2787 | Unique_Node_List useful; |
| 2788 | C->identify_useful_nodes(useful); |
| 2789 | for (uint i = 0; i < useful.size(); i++) { |
| 2790 | MachNode* m = useful.at(i)->isa_Mach(); |
| 2791 | if (m != NULL__null) { |
| 2792 | assert(!Matcher::is_reg2reg_move(m), "no MoveVec nodes allowed")do { if (!(!Matcher::is_reg2reg_move(m))) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 2792, "assert(" "!Matcher::is_reg2reg_move(m)" ") failed", "no MoveVec nodes allowed" ); ::breakpoint(); } } while (0); |
| 2793 | for (uint j = 0; j < m->num_opnds(); j++) { |
| 2794 | assert(!Matcher::is_generic_vector(m->_opnds[j]), "no generic vector operands allowed")do { if (!(!Matcher::is_generic_vector(m->_opnds[j]))) { ( *g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 2794, "assert(" "!Matcher::is_generic_vector(m->_opnds[j])" ") failed", "no generic vector operands allowed"); ::breakpoint (); } } while (0); |
| 2795 | } |
| 2796 | } |
| 2797 | } |
| 2798 | } |
| 2799 | return true; |
| 2800 | } |
| 2801 | #endif // ASSERT |
| 2802 | |
| 2803 | // Used by the DFA in dfa_xxx.cpp. Check for a following barrier or |
| 2804 | // atomic instruction acting as a store_load barrier without any |
| 2805 | // intervening volatile load, and thus we don't need a barrier here. |
| 2806 | // We retain the Node to act as a compiler ordering barrier. |
| 2807 | bool Matcher::post_store_load_barrier(const Node* vmb) { |
| 2808 | Compile* C = Compile::current(); |
| 2809 | assert(vmb->is_MemBar(), "")do { if (!(vmb->is_MemBar())) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 2809, "assert(" "vmb->is_MemBar()" ") failed", ""); ::breakpoint (); } } while (0); |
| 2810 | assert(vmb->Opcode() != Op_MemBarAcquire && vmb->Opcode() != Op_LoadFence, "")do { if (!(vmb->Opcode() != Op_MemBarAcquire && vmb ->Opcode() != Op_LoadFence)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 2810, "assert(" "vmb->Opcode() != Op_MemBarAcquire && vmb->Opcode() != Op_LoadFence" ") failed", ""); ::breakpoint(); } } while (0); |
| 2811 | const MemBarNode* membar = vmb->as_MemBar(); |
| 2812 | |
| 2813 | // Get the Ideal Proj node, ctrl, that can be used to iterate forward |
| 2814 | Node* ctrl = NULL__null; |
| 2815 | for (DUIterator_Fast imax, i = membar->fast_outs(imax); i < imax; i++) { |
| 2816 | Node* p = membar->fast_out(i); |
| 2817 | assert(p->is_Proj(), "only projections here")do { if (!(p->is_Proj())) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 2817, "assert(" "p->is_Proj()" ") failed", "only projections here" ); ::breakpoint(); } } while (0); |
| 2818 | if ((p->as_Proj()->_con == TypeFunc::Control) && |
| 2819 | !C->node_arena()->contains(p)) { // Unmatched old-space only |
| 2820 | ctrl = p; |
| 2821 | break; |
| 2822 | } |
| 2823 | } |
| 2824 | assert((ctrl != NULL), "missing control projection")do { if (!((ctrl != __null))) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 2824, "assert(" "(ctrl != __null)" ") failed", "missing control projection" ); ::breakpoint(); } } while (0); |
| 2825 | |
| 2826 | for (DUIterator_Fast jmax, j = ctrl->fast_outs(jmax); j < jmax; j++) { |
| 2827 | Node *x = ctrl->fast_out(j); |
| 2828 | int xop = x->Opcode(); |
| 2829 | |
| 2830 | // We don't need current barrier if we see another or a lock |
| 2831 | // before seeing volatile load. |
| 2832 | // |
| 2833 | // Op_Fastunlock previously appeared in the Op_* list below. |
| 2834 | // With the advent of 1-0 lock operations we're no longer guaranteed |
| 2835 | // that a monitor exit operation contains a serializing instruction. |
| 2836 | |
| 2837 | if (xop == Op_MemBarVolatile || |
| 2838 | xop == Op_CompareAndExchangeB || |
| 2839 | xop == Op_CompareAndExchangeS || |
| 2840 | xop == Op_CompareAndExchangeI || |
| 2841 | xop == Op_CompareAndExchangeL || |
| 2842 | xop == Op_CompareAndExchangeP || |
| 2843 | xop == Op_CompareAndExchangeN || |
| 2844 | xop == Op_WeakCompareAndSwapB || |
| 2845 | xop == Op_WeakCompareAndSwapS || |
| 2846 | xop == Op_WeakCompareAndSwapL || |
| 2847 | xop == Op_WeakCompareAndSwapP || |
| 2848 | xop == Op_WeakCompareAndSwapN || |
| 2849 | xop == Op_WeakCompareAndSwapI || |
| 2850 | xop == Op_CompareAndSwapB || |
| 2851 | xop == Op_CompareAndSwapS || |
| 2852 | xop == Op_CompareAndSwapL || |
| 2853 | xop == Op_CompareAndSwapP || |
| 2854 | xop == Op_CompareAndSwapN || |
| 2855 | xop == Op_CompareAndSwapI || |
| 2856 | BarrierSet::barrier_set()->barrier_set_c2()->matcher_is_store_load_barrier(x, xop)) { |
| 2857 | return true; |
| 2858 | } |
| 2859 | |
| 2860 | // Op_FastLock previously appeared in the Op_* list above. |
| 2861 | if (xop == Op_FastLock) { |
| 2862 | return true; |
| 2863 | } |
| 2864 | |
| 2865 | if (x->is_MemBar()) { |
| 2866 | // We must retain this membar if there is an upcoming volatile |
| 2867 | // load, which will be followed by acquire membar. |
| 2868 | if (xop == Op_MemBarAcquire || xop == Op_LoadFence) { |
| 2869 | return false; |
| 2870 | } else { |
| 2871 | // For other kinds of barriers, check by pretending we |
| 2872 | // are them, and seeing if we can be removed. |
| 2873 | return post_store_load_barrier(x->as_MemBar()); |
| 2874 | } |
| 2875 | } |
| 2876 | |
| 2877 | // probably not necessary to check for these |
| 2878 | if (x->is_Call() || x->is_SafePoint() || x->is_block_proj()) { |
| 2879 | return false; |
| 2880 | } |
| 2881 | } |
| 2882 | return false; |
| 2883 | } |
| 2884 | |
| 2885 | // Check whether node n is a branch to an uncommon trap that we could |
| 2886 | // optimize as test with very high branch costs in case of going to |
| 2887 | // the uncommon trap. The code must be able to be recompiled to use |
| 2888 | // a cheaper test. |
| 2889 | bool Matcher::branches_to_uncommon_trap(const Node *n) { |
| 2890 | // Don't do it for natives, adapters, or runtime stubs |
| 2891 | Compile *C = Compile::current(); |
| 2892 | if (!C->is_method_compilation()) return false; |
| 2893 | |
| 2894 | assert(n->is_If(), "You should only call this on if nodes.")do { if (!(n->is_If())) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 2894, "assert(" "n->is_If()" ") failed", "You should only call this on if nodes." ); ::breakpoint(); } } while (0); |
| 2895 | IfNode *ifn = n->as_If(); |
| 2896 | |
| 2897 | Node *ifFalse = NULL__null; |
| 2898 | for (DUIterator_Fast imax, i = ifn->fast_outs(imax); i < imax; i++) { |
| 2899 | if (ifn->fast_out(i)->is_IfFalse()) { |
| 2900 | ifFalse = ifn->fast_out(i); |
| 2901 | break; |
| 2902 | } |
| 2903 | } |
| 2904 | assert(ifFalse, "An If should have an ifFalse. Graph is broken.")do { if (!(ifFalse)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 2904, "assert(" "ifFalse" ") failed", "An If should have an ifFalse. Graph is broken." ); ::breakpoint(); } } while (0); |
| 2905 | |
| 2906 | Node *reg = ifFalse; |
| 2907 | int cnt = 4; // We must protect against cycles. Limit to 4 iterations. |
| 2908 | // Alternatively use visited set? Seems too expensive. |
| 2909 | while (reg != NULL__null && cnt > 0) { |
| 2910 | CallNode *call = NULL__null; |
| 2911 | RegionNode *nxt_reg = NULL__null; |
| 2912 | for (DUIterator_Fast imax, i = reg->fast_outs(imax); i < imax; i++) { |
| 2913 | Node *o = reg->fast_out(i); |
| 2914 | if (o->is_Call()) { |
| 2915 | call = o->as_Call(); |
| 2916 | } |
| 2917 | if (o->is_Region()) { |
| 2918 | nxt_reg = o->as_Region(); |
| 2919 | } |
| 2920 | } |
| 2921 | |
| 2922 | if (call && |
| 2923 | call->entry_point() == SharedRuntime::uncommon_trap_blob()->entry_point()) { |
| 2924 | const Type* trtype = call->in(TypeFunc::Parms)->bottom_type(); |
| 2925 | if (trtype->isa_int() && trtype->is_int()->is_con()) { |
| 2926 | jint tr_con = trtype->is_int()->get_con(); |
| 2927 | Deoptimization::DeoptReason reason = Deoptimization::trap_request_reason(tr_con); |
| 2928 | Deoptimization::DeoptAction action = Deoptimization::trap_request_action(tr_con); |
| 2929 | assert((int)reason < (int)BitsPerInt, "recode bit map")do { if (!((int)reason < (int)BitsPerInt)) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 2929, "assert(" "(int)reason < (int)BitsPerInt" ") failed" , "recode bit map"); ::breakpoint(); } } while (0); |
| 2930 | |
| 2931 | if (is_set_nth_bit(C->allowed_deopt_reasons(), (int)reason) |
| 2932 | && action != Deoptimization::Action_none) { |
| 2933 | // This uncommon trap is sure to recompile, eventually. |
| 2934 | // When that happens, C->too_many_traps will prevent |
| 2935 | // this transformation from happening again. |
| 2936 | return true; |
| 2937 | } |
| 2938 | } |
| 2939 | } |
| 2940 | |
| 2941 | reg = nxt_reg; |
| 2942 | cnt--; |
| 2943 | } |
| 2944 | |
| 2945 | return false; |
| 2946 | } |
| 2947 | |
| 2948 | //============================================================================= |
| 2949 | //---------------------------State--------------------------------------------- |
| 2950 | State::State(void) : _rule() { |
| 2951 | #ifdef ASSERT1 |
| 2952 | _id = 0; |
| 2953 | _kids[0] = _kids[1] = (State*)(intptr_t) CONST64(0xcafebabecafebabe)(0xcafebabecafebabeLL); |
| 2954 | _leaf = (Node*)(intptr_t) CONST64(0xbaadf00dbaadf00d)(0xbaadf00dbaadf00dLL); |
| 2955 | #endif |
| 2956 | } |
| 2957 | |
| 2958 | #ifdef ASSERT1 |
| 2959 | State::~State() { |
| 2960 | _id = 99; |
| 2961 | _kids[0] = _kids[1] = (State*)(intptr_t) CONST64(0xcafebabecafebabe)(0xcafebabecafebabeLL); |
| 2962 | _leaf = (Node*)(intptr_t) CONST64(0xbaadf00dbaadf00d)(0xbaadf00dbaadf00dLL); |
| 2963 | memset(_cost, -3, sizeof(_cost)); |
| 2964 | memset(_rule, -3, sizeof(_rule)); |
| 2965 | } |
| 2966 | #endif |
| 2967 | |
| 2968 | #ifndef PRODUCT |
| 2969 | //---------------------------dump---------------------------------------------- |
| 2970 | void State::dump() { |
| 2971 | tty->print("\n"); |
| 2972 | dump(0); |
| 2973 | } |
| 2974 | |
| 2975 | void State::dump(int depth) { |
| 2976 | for (int j = 0; j < depth; j++) { |
| 2977 | tty->print(" "); |
| 2978 | } |
| 2979 | tty->print("--N: "); |
| 2980 | _leaf->dump(); |
| 2981 | uint i; |
| 2982 | for (i = 0; i < _LAST_MACH_OPER; i++) { |
| 2983 | // Check for valid entry |
| 2984 | if (valid(i)) { |
| 2985 | for (int j = 0; j < depth; j++) { |
| 2986 | tty->print(" "); |
| 2987 | } |
| 2988 | assert(cost(i) != max_juint, "cost must be a valid value")do { if (!(cost(i) != max_juint)) { (*g_assert_poison) = 'X'; ; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 2988, "assert(" "cost(i) != max_juint" ") failed", "cost must be a valid value" ); ::breakpoint(); } } while (0); |
| 2989 | assert(rule(i) < _last_Mach_Node, "rule[i] must be valid rule")do { if (!(rule(i) < _last_Mach_Node)) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/matcher.cpp" , 2989, "assert(" "rule(i) < _last_Mach_Node" ") failed", "rule[i] must be valid rule" ); ::breakpoint(); } } while (0); |
| 2990 | tty->print_cr("%s %d %s", |
| 2991 | ruleName[i], cost(i), ruleName[rule(i)] ); |
| 2992 | } |
| 2993 | } |
| 2994 | tty->cr(); |
| 2995 | |
| 2996 | for (i = 0; i < 2; i++) { |
| 2997 | if (_kids[i]) { |
| 2998 | _kids[i]->dump(depth + 1); |
| 2999 | } |
| 3000 | } |
| 3001 | } |
| 3002 | #endif |