Mercurial > hg > graal-compiler
annotate src/share/vm/c1/c1_ValueStack.cpp @ 18027:9f169829d0e1
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author | asaha |
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date | Tue, 08 Jul 2014 13:25:13 -0700 |
parents | b9a9ed0f8eeb |
children | 96d2c94bbdd0 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1999, 2012, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "c1/c1_IR.hpp" | |
27 #include "c1/c1_InstructionPrinter.hpp" | |
28 #include "c1/c1_ValueStack.hpp" | |
0 | 29 |
30 | |
31 // Implementation of ValueStack | |
32 | |
1819 | 33 ValueStack::ValueStack(IRScope* scope, ValueStack* caller_state) |
0 | 34 : _scope(scope) |
1819 | 35 , _caller_state(caller_state) |
36 , _bci(-99) | |
37 , _kind(Parsing) | |
38 , _locals(scope->method()->max_locals(), NULL) | |
39 , _stack(scope->method()->max_stack()) | |
40 , _locks() | |
0 | 41 { |
1819 | 42 verify(); |
0 | 43 } |
44 | |
45 | |
1819 | 46 ValueStack::ValueStack(ValueStack* copy_from, Kind kind, int bci) |
47 : _scope(copy_from->scope()) | |
48 , _caller_state(copy_from->caller_state()) | |
49 , _bci(bci) | |
50 , _kind(kind) | |
51 , _locals() | |
52 , _stack() | |
53 , _locks(copy_from->locks_size()) | |
54 { | |
55 assert(kind != EmptyExceptionState || !Compilation::current()->env()->jvmti_can_access_local_variables(), "need locals"); | |
56 if (kind != EmptyExceptionState) { | |
57 // only allocate space if we need to copy the locals-array | |
58 _locals = Values(copy_from->locals_size()); | |
59 _locals.appendAll(©_from->_locals); | |
0 | 60 } |
1819 | 61 |
62 if (kind != ExceptionState && kind != EmptyExceptionState) { | |
63 if (kind == Parsing) { | |
64 // stack will be modified, so reserve enough space to avoid resizing | |
65 _stack = Values(scope()->method()->max_stack()); | |
66 } else { | |
67 // stack will not be modified, so do not waste space | |
68 _stack = Values(copy_from->stack_size()); | |
0 | 69 } |
1819 | 70 _stack.appendAll(©_from->_stack); |
0 | 71 } |
72 | |
1819 | 73 _locks.appendAll(©_from->_locks); |
74 | |
75 verify(); | |
0 | 76 } |
77 | |
78 | |
1819 | 79 bool ValueStack::is_same(ValueStack* s) { |
80 if (scope() != s->scope()) return false; | |
81 if (caller_state() != s->caller_state()) return false; | |
82 | |
83 if (locals_size() != s->locals_size()) return false; | |
84 if (stack_size() != s->stack_size()) return false; | |
85 if (locks_size() != s->locks_size()) return false; | |
86 | |
0 | 87 // compare each stack element with the corresponding stack element of s |
88 int index; | |
89 Value value; | |
90 for_each_stack_value(this, index, value) { | |
91 if (value->type()->tag() != s->stack_at(index)->type()->tag()) return false; | |
92 } | |
93 for_each_lock_value(this, index, value) { | |
94 if (value != s->lock_at(index)) return false; | |
95 } | |
96 return true; | |
97 } | |
98 | |
99 void ValueStack::clear_locals() { | |
100 for (int i = _locals.length() - 1; i >= 0; i--) { | |
101 _locals.at_put(i, NULL); | |
102 } | |
103 } | |
104 | |
105 | |
106 void ValueStack::pin_stack_for_linear_scan() { | |
107 for_each_state_value(this, v, | |
108 if (v->as_Constant() == NULL && v->as_Local() == NULL) { | |
109 v->pin(Instruction::PinStackForStateSplit); | |
110 } | |
111 ); | |
112 } | |
113 | |
114 | |
115 // apply function to all values of a list; factored out from values_do(f) | |
1584 | 116 void ValueStack::apply(Values list, ValueVisitor* f) { |
0 | 117 for (int i = 0; i < list.length(); i++) { |
118 Value* va = list.adr_at(i); | |
119 Value v0 = *va; | |
1819 | 120 if (v0 != NULL && !v0->type()->is_illegal()) { |
121 f->visit(va); | |
0 | 122 #ifdef ASSERT |
1819 | 123 Value v1 = *va; |
124 assert(v1->type()->is_illegal() || v0->type()->tag() == v1->type()->tag(), "types must match"); | |
125 assert(!v1->type()->is_double_word() || list.at(i + 1) == NULL, "hi-word of doubleword value must be NULL"); | |
0 | 126 #endif |
1819 | 127 if (v0->type()->is_double_word()) i++; |
0 | 128 } |
129 } | |
130 } | |
131 | |
132 | |
1584 | 133 void ValueStack::values_do(ValueVisitor* f) { |
0 | 134 ValueStack* state = this; |
135 for_each_state(state) { | |
136 apply(state->_locals, f); | |
1819 | 137 apply(state->_stack, f); |
138 apply(state->_locks, f); | |
0 | 139 } |
140 } | |
141 | |
142 | |
143 Values* ValueStack::pop_arguments(int argument_size) { | |
144 assert(stack_size() >= argument_size, "stack too small or too many arguments"); | |
145 int base = stack_size() - argument_size; | |
146 Values* args = new Values(argument_size); | |
147 for (int i = base; i < stack_size();) args->push(stack_at_inc(i)); | |
148 truncate_stack(base); | |
149 return args; | |
150 } | |
151 | |
152 | |
1819 | 153 int ValueStack::total_locks_size() const { |
154 int num_locks = 0; | |
155 const ValueStack* state = this; | |
156 for_each_state(state) { | |
157 num_locks += state->locks_size(); | |
158 } | |
159 return num_locks; | |
160 } | |
161 | |
162 int ValueStack::lock(Value obj) { | |
0 | 163 _locks.push(obj); |
1819 | 164 int num_locks = total_locks_size(); |
165 scope()->set_min_number_of_locks(num_locks); | |
166 return num_locks - 1; | |
0 | 167 } |
168 | |
169 | |
170 int ValueStack::unlock() { | |
171 _locks.pop(); | |
1819 | 172 return total_locks_size(); |
0 | 173 } |
174 | |
175 | |
176 void ValueStack::setup_phi_for_stack(BlockBegin* b, int index) { | |
177 assert(stack_at(index)->as_Phi() == NULL || stack_at(index)->as_Phi()->block() != b, "phi function already created"); | |
178 | |
179 ValueType* t = stack_at(index)->type(); | |
180 Value phi = new Phi(t, b, -index - 1); | |
181 _stack[index] = phi; | |
182 | |
1819 | 183 assert(!t->is_double_word() || _stack.at(index + 1) == NULL, "hi-word of doubleword value must be NULL"); |
0 | 184 } |
185 | |
186 void ValueStack::setup_phi_for_local(BlockBegin* b, int index) { | |
187 assert(local_at(index)->as_Phi() == NULL || local_at(index)->as_Phi()->block() != b, "phi function already created"); | |
188 | |
189 ValueType* t = local_at(index)->type(); | |
190 Value phi = new Phi(t, b, index); | |
191 store_local(index, phi); | |
192 } | |
193 | |
194 #ifndef PRODUCT | |
1819 | 195 |
0 | 196 void ValueStack::print() { |
1819 | 197 scope()->method()->print_name(); |
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198 tty->cr(); |
0 | 199 if (stack_is_empty()) { |
200 tty->print_cr("empty stack"); | |
201 } else { | |
202 InstructionPrinter ip; | |
203 for (int i = 0; i < stack_size();) { | |
204 Value t = stack_at_inc(i); | |
205 tty->print("%2d ", i); | |
1819 | 206 tty->print("%c%d ", t->type()->tchar(), t->id()); |
0 | 207 ip.print_instr(t); |
208 tty->cr(); | |
209 } | |
210 } | |
211 if (!no_active_locks()) { | |
212 InstructionPrinter ip; | |
1819 | 213 for (int i = 0; i < locks_size(); i++) { |
0 | 214 Value t = lock_at(i); |
215 tty->print("lock %2d ", i); | |
216 if (t == NULL) { | |
217 tty->print("this"); | |
218 } else { | |
1819 | 219 tty->print("%c%d ", t->type()->tchar(), t->id()); |
0 | 220 ip.print_instr(t); |
221 } | |
222 tty->cr(); | |
223 } | |
224 } | |
225 if (locals_size() > 0) { | |
226 InstructionPrinter ip; | |
227 for (int i = 0; i < locals_size();) { | |
228 Value l = _locals[i]; | |
229 tty->print("local %d ", i); | |
230 if (l == NULL) { | |
231 tty->print("null"); | |
232 i ++; | |
233 } else { | |
1819 | 234 tty->print("%c%d ", l->type()->tchar(), l->id()); |
0 | 235 ip.print_instr(l); |
236 if (l->type()->is_illegal() || l->type()->is_single_word()) i ++; else i += 2; | |
237 } | |
238 tty->cr(); | |
239 } | |
240 } | |
1819 | 241 |
242 if (caller_state() != NULL) { | |
243 caller_state()->print(); | |
244 } | |
0 | 245 } |
246 | |
247 | |
248 void ValueStack::verify() { | |
1819 | 249 assert(scope() != NULL, "scope must exist"); |
250 if (caller_state() != NULL) { | |
251 assert(caller_state()->scope() == scope()->caller(), "invalid caller scope"); | |
252 caller_state()->verify(); | |
253 } | |
254 | |
255 if (kind() == Parsing) { | |
256 assert(bci() == -99, "bci not defined during parsing"); | |
257 } else { | |
258 assert(bci() >= -1, "bci out of range"); | |
259 assert(bci() < scope()->method()->code_size(), "bci out of range"); | |
260 assert(bci() == SynchronizationEntryBCI || Bytecodes::is_defined(scope()->method()->java_code_at_bci(bci())), "make sure bci points at a real bytecode"); | |
261 assert(scope()->method()->liveness_at_bci(bci()).is_valid(), "liveness at bci must be valid"); | |
262 } | |
263 | |
264 int i; | |
265 for (i = 0; i < stack_size(); i++) { | |
266 Value v = _stack.at(i); | |
267 if (v == NULL) { | |
268 assert(_stack.at(i - 1)->type()->is_double_word(), "only hi-words are NULL on stack"); | |
269 } else if (v->type()->is_double_word()) { | |
270 assert(_stack.at(i + 1) == NULL, "hi-word must be NULL"); | |
271 } | |
272 } | |
273 | |
274 for (i = 0; i < locals_size(); i++) { | |
275 Value v = _locals.at(i); | |
276 if (v != NULL && v->type()->is_double_word()) { | |
277 assert(_locals.at(i + 1) == NULL, "hi-word must be NULL"); | |
278 } | |
279 } | |
280 | |
281 for_each_state_value(this, v, | |
282 assert(v != NULL, "just test if state-iteration succeeds"); | |
283 ); | |
0 | 284 } |
285 #endif // PRODUCT |