Mercurial > hg > graal-compiler
annotate src/share/vm/c1/c1_ValueStack.cpp @ 1819:f02a8bbe6ed4
6986046: C1 valuestack cleanup
Summary: fixes an historical oddity in C1 with inlining where all of the expression stacks are kept in the topmost ValueStack instead of being in their respective ValueStacks.
Reviewed-by: never
Contributed-by: Christian Wimmer <cwimmer@uci.edu>
| author | roland |
|---|---|
| date | Tue, 29 Dec 2009 19:08:54 +0100 |
| parents | b812ff5abc73 |
| children | f95d63e2154a |
| rev | line source |
|---|---|
| 0 | 1 /* |
|
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2 * Copyright (c) 1999, 2006, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 25 #include "incls/_precompiled.incl" | |
| 26 #include "incls/_c1_ValueStack.cpp.incl" | |
| 27 | |
| 28 | |
| 29 // Implementation of ValueStack | |
| 30 | |
| 1819 | 31 ValueStack::ValueStack(IRScope* scope, ValueStack* caller_state) |
| 0 | 32 : _scope(scope) |
| 1819 | 33 , _caller_state(caller_state) |
| 34 , _bci(-99) | |
| 35 , _kind(Parsing) | |
| 36 , _locals(scope->method()->max_locals(), NULL) | |
| 37 , _stack(scope->method()->max_stack()) | |
| 38 , _locks() | |
| 0 | 39 { |
| 1819 | 40 verify(); |
| 0 | 41 } |
| 42 | |
| 43 | |
| 1819 | 44 ValueStack::ValueStack(ValueStack* copy_from, Kind kind, int bci) |
| 45 : _scope(copy_from->scope()) | |
| 46 , _caller_state(copy_from->caller_state()) | |
| 47 , _bci(bci) | |
| 48 , _kind(kind) | |
| 49 , _locals() | |
| 50 , _stack() | |
| 51 , _locks(copy_from->locks_size()) | |
| 52 { | |
| 53 assert(kind != EmptyExceptionState || !Compilation::current()->env()->jvmti_can_access_local_variables(), "need locals"); | |
| 54 if (kind != EmptyExceptionState) { | |
| 55 // only allocate space if we need to copy the locals-array | |
| 56 _locals = Values(copy_from->locals_size()); | |
| 57 _locals.appendAll(©_from->_locals); | |
| 0 | 58 } |
| 1819 | 59 |
| 60 if (kind != ExceptionState && kind != EmptyExceptionState) { | |
| 61 if (kind == Parsing) { | |
| 62 // stack will be modified, so reserve enough space to avoid resizing | |
| 63 _stack = Values(scope()->method()->max_stack()); | |
| 64 } else { | |
| 65 // stack will not be modified, so do not waste space | |
| 66 _stack = Values(copy_from->stack_size()); | |
| 0 | 67 } |
| 1819 | 68 _stack.appendAll(©_from->_stack); |
| 0 | 69 } |
| 70 | |
| 1819 | 71 _locks.appendAll(©_from->_locks); |
| 72 | |
| 73 verify(); | |
| 0 | 74 } |
| 75 | |
| 76 | |
| 1819 | 77 bool ValueStack::is_same(ValueStack* s) { |
| 78 if (scope() != s->scope()) return false; | |
| 79 if (caller_state() != s->caller_state()) return false; | |
| 80 | |
| 81 if (locals_size() != s->locals_size()) return false; | |
| 82 if (stack_size() != s->stack_size()) return false; | |
| 83 if (locks_size() != s->locks_size()) return false; | |
| 84 | |
| 0 | 85 // compare each stack element with the corresponding stack element of s |
| 86 int index; | |
| 87 Value value; | |
| 88 for_each_stack_value(this, index, value) { | |
| 89 if (value->type()->tag() != s->stack_at(index)->type()->tag()) return false; | |
| 90 } | |
| 91 for_each_lock_value(this, index, value) { | |
| 92 if (value != s->lock_at(index)) return false; | |
| 93 } | |
| 94 return true; | |
| 95 } | |
| 96 | |
| 97 void ValueStack::clear_locals() { | |
| 98 for (int i = _locals.length() - 1; i >= 0; i--) { | |
| 99 _locals.at_put(i, NULL); | |
| 100 } | |
| 101 } | |
| 102 | |
| 103 | |
| 104 void ValueStack::pin_stack_for_linear_scan() { | |
| 105 for_each_state_value(this, v, | |
| 106 if (v->as_Constant() == NULL && v->as_Local() == NULL) { | |
| 107 v->pin(Instruction::PinStackForStateSplit); | |
| 108 } | |
| 109 ); | |
| 110 } | |
| 111 | |
| 112 | |
| 113 // apply function to all values of a list; factored out from values_do(f) | |
| 1584 | 114 void ValueStack::apply(Values list, ValueVisitor* f) { |
| 0 | 115 for (int i = 0; i < list.length(); i++) { |
| 116 Value* va = list.adr_at(i); | |
| 117 Value v0 = *va; | |
| 1819 | 118 if (v0 != NULL && !v0->type()->is_illegal()) { |
| 119 f->visit(va); | |
| 0 | 120 #ifdef ASSERT |
| 1819 | 121 Value v1 = *va; |
| 122 assert(v1->type()->is_illegal() || v0->type()->tag() == v1->type()->tag(), "types must match"); | |
| 123 assert(!v1->type()->is_double_word() || list.at(i + 1) == NULL, "hi-word of doubleword value must be NULL"); | |
| 0 | 124 #endif |
| 1819 | 125 if (v0->type()->is_double_word()) i++; |
| 0 | 126 } |
| 127 } | |
| 128 } | |
| 129 | |
| 130 | |
| 1584 | 131 void ValueStack::values_do(ValueVisitor* f) { |
| 0 | 132 ValueStack* state = this; |
| 133 for_each_state(state) { | |
| 134 apply(state->_locals, f); | |
| 1819 | 135 apply(state->_stack, f); |
| 136 apply(state->_locks, f); | |
| 0 | 137 } |
| 138 } | |
| 139 | |
| 140 | |
| 141 Values* ValueStack::pop_arguments(int argument_size) { | |
| 142 assert(stack_size() >= argument_size, "stack too small or too many arguments"); | |
| 143 int base = stack_size() - argument_size; | |
| 144 Values* args = new Values(argument_size); | |
| 145 for (int i = base; i < stack_size();) args->push(stack_at_inc(i)); | |
| 146 truncate_stack(base); | |
| 147 return args; | |
| 148 } | |
| 149 | |
| 150 | |
| 1819 | 151 int ValueStack::total_locks_size() const { |
| 152 int num_locks = 0; | |
| 153 const ValueStack* state = this; | |
| 154 for_each_state(state) { | |
| 155 num_locks += state->locks_size(); | |
| 156 } | |
| 157 return num_locks; | |
| 158 } | |
| 159 | |
| 160 int ValueStack::lock(Value obj) { | |
| 0 | 161 _locks.push(obj); |
| 1819 | 162 int num_locks = total_locks_size(); |
| 163 scope()->set_min_number_of_locks(num_locks); | |
| 164 return num_locks - 1; | |
| 0 | 165 } |
| 166 | |
| 167 | |
| 168 int ValueStack::unlock() { | |
| 169 _locks.pop(); | |
| 1819 | 170 return total_locks_size(); |
| 0 | 171 } |
| 172 | |
| 173 | |
| 174 void ValueStack::setup_phi_for_stack(BlockBegin* b, int index) { | |
| 175 assert(stack_at(index)->as_Phi() == NULL || stack_at(index)->as_Phi()->block() != b, "phi function already created"); | |
| 176 | |
| 177 ValueType* t = stack_at(index)->type(); | |
| 178 Value phi = new Phi(t, b, -index - 1); | |
| 179 _stack[index] = phi; | |
| 180 | |
| 1819 | 181 assert(!t->is_double_word() || _stack.at(index + 1) == NULL, "hi-word of doubleword value must be NULL"); |
| 0 | 182 } |
| 183 | |
| 184 void ValueStack::setup_phi_for_local(BlockBegin* b, int index) { | |
| 185 assert(local_at(index)->as_Phi() == NULL || local_at(index)->as_Phi()->block() != b, "phi function already created"); | |
| 186 | |
| 187 ValueType* t = local_at(index)->type(); | |
| 188 Value phi = new Phi(t, b, index); | |
| 189 store_local(index, phi); | |
| 190 } | |
| 191 | |
| 192 #ifndef PRODUCT | |
| 1819 | 193 |
| 0 | 194 void ValueStack::print() { |
| 1819 | 195 scope()->method()->print_name(); |
| 0 | 196 if (stack_is_empty()) { |
| 197 tty->print_cr("empty stack"); | |
| 198 } else { | |
| 199 InstructionPrinter ip; | |
| 200 for (int i = 0; i < stack_size();) { | |
| 201 Value t = stack_at_inc(i); | |
| 202 tty->print("%2d ", i); | |
| 1819 | 203 tty->print("%c%d ", t->type()->tchar(), t->id()); |
| 0 | 204 ip.print_instr(t); |
| 205 tty->cr(); | |
| 206 } | |
| 207 } | |
| 208 if (!no_active_locks()) { | |
| 209 InstructionPrinter ip; | |
| 1819 | 210 for (int i = 0; i < locks_size(); i++) { |
| 0 | 211 Value t = lock_at(i); |
| 212 tty->print("lock %2d ", i); | |
| 213 if (t == NULL) { | |
| 214 tty->print("this"); | |
| 215 } else { | |
| 1819 | 216 tty->print("%c%d ", t->type()->tchar(), t->id()); |
| 0 | 217 ip.print_instr(t); |
| 218 } | |
| 219 tty->cr(); | |
| 220 } | |
| 221 } | |
| 222 if (locals_size() > 0) { | |
| 223 InstructionPrinter ip; | |
| 224 for (int i = 0; i < locals_size();) { | |
| 225 Value l = _locals[i]; | |
| 226 tty->print("local %d ", i); | |
| 227 if (l == NULL) { | |
| 228 tty->print("null"); | |
| 229 i ++; | |
| 230 } else { | |
| 1819 | 231 tty->print("%c%d ", l->type()->tchar(), l->id()); |
| 0 | 232 ip.print_instr(l); |
| 233 if (l->type()->is_illegal() || l->type()->is_single_word()) i ++; else i += 2; | |
| 234 } | |
| 235 tty->cr(); | |
| 236 } | |
| 237 } | |
| 1819 | 238 |
| 239 if (caller_state() != NULL) { | |
| 240 caller_state()->print(); | |
| 241 } | |
| 0 | 242 } |
| 243 | |
| 244 | |
| 245 void ValueStack::verify() { | |
| 1819 | 246 assert(scope() != NULL, "scope must exist"); |
| 247 if (caller_state() != NULL) { | |
| 248 assert(caller_state()->scope() == scope()->caller(), "invalid caller scope"); | |
| 249 caller_state()->verify(); | |
| 250 } | |
| 251 | |
| 252 if (kind() == Parsing) { | |
| 253 assert(bci() == -99, "bci not defined during parsing"); | |
| 254 } else { | |
| 255 assert(bci() >= -1, "bci out of range"); | |
| 256 assert(bci() < scope()->method()->code_size(), "bci out of range"); | |
| 257 assert(bci() == SynchronizationEntryBCI || Bytecodes::is_defined(scope()->method()->java_code_at_bci(bci())), "make sure bci points at a real bytecode"); | |
| 258 assert(scope()->method()->liveness_at_bci(bci()).is_valid(), "liveness at bci must be valid"); | |
| 259 } | |
| 260 | |
| 261 int i; | |
| 262 for (i = 0; i < stack_size(); i++) { | |
| 263 Value v = _stack.at(i); | |
| 264 if (v == NULL) { | |
| 265 assert(_stack.at(i - 1)->type()->is_double_word(), "only hi-words are NULL on stack"); | |
| 266 } else if (v->type()->is_double_word()) { | |
| 267 assert(_stack.at(i + 1) == NULL, "hi-word must be NULL"); | |
| 268 } | |
| 269 } | |
| 270 | |
| 271 for (i = 0; i < locals_size(); i++) { | |
| 272 Value v = _locals.at(i); | |
| 273 if (v != NULL && v->type()->is_double_word()) { | |
| 274 assert(_locals.at(i + 1) == NULL, "hi-word must be NULL"); | |
| 275 } | |
| 276 } | |
| 277 | |
| 278 for_each_state_value(this, v, | |
| 279 assert(v != NULL, "just test if state-iteration succeeds"); | |
| 280 ); | |
| 0 | 281 } |
| 282 #endif // PRODUCT |