Mercurial > hg > graal-jvmci-8
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 |
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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 |