Mercurial > hg > truffle
annotate src/share/vm/c1/c1_ValueStack.hpp @ 1931:48bbaead8b6c
Adjustments after merge with OpenJDK repository.
author | Thomas Wuerthinger <wuerthinger@ssw.jku.at> |
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date | Tue, 30 Nov 2010 16:39:35 +0100 |
parents | 1375bc8922e4 |
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 class ValueStack: public CompilationResourceObj { | |
1819 | 26 public: |
27 enum Kind { | |
28 Parsing, // During abstract interpretation in GraphBuilder | |
29 CallerState, // Caller state when inlining | |
30 StateBefore, // Before before execution of instruction | |
31 StateAfter, // After execution of instruction | |
32 ExceptionState, // Exception handling of instruction | |
33 EmptyExceptionState, // Exception handling of instructions not covered by an xhandler | |
34 BlockBeginState // State of BlockBegin instruction with phi functions of this block | |
35 }; | |
36 | |
0 | 37 private: |
38 IRScope* _scope; // the enclosing scope | |
1819 | 39 ValueStack* _caller_state; |
40 int _bci; | |
41 Kind _kind; | |
42 | |
0 | 43 Values _locals; // the locals |
44 Values _stack; // the expression stack | |
45 Values _locks; // the monitor stack (holding the locked values) | |
46 | |
47 Value check(ValueTag tag, Value t) { | |
48 assert(tag == t->type()->tag() || tag == objectTag && t->type()->tag() == addressTag, "types must correspond"); | |
49 return t; | |
50 } | |
51 | |
52 Value check(ValueTag tag, Value t, Value h) { | |
1819 | 53 assert(h == NULL, "hi-word of doubleword value must be NULL"); |
0 | 54 return check(tag, t); |
55 } | |
56 | |
57 // helper routine | |
1584 | 58 static void apply(Values list, ValueVisitor* f); |
0 | 59 |
1819 | 60 // for simplified copying |
61 ValueStack(ValueStack* copy_from, Kind kind, int bci); | |
62 | |
0 | 63 public: |
64 // creation | |
1819 | 65 ValueStack(IRScope* scope, ValueStack* caller_state); |
0 | 66 |
1819 | 67 ValueStack* copy() { return new ValueStack(this, _kind, _bci); } |
68 ValueStack* copy(Kind new_kind, int new_bci) { return new ValueStack(this, new_kind, new_bci); } | |
69 ValueStack* copy_for_parsing() { return new ValueStack(this, Parsing, -99); } | |
70 | |
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71 void set_caller_state(ValueStack* s) { |
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72 assert(kind() == EmptyExceptionState || |
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73 (Compilation::current()->env()->jvmti_can_access_local_variables() && kind() == ExceptionState), |
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74 "only EmptyExceptionStates can be modified"); |
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75 _caller_state = s; |
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76 } |
1819 | 77 |
0 | 78 bool is_same(ValueStack* s); // returns true if this & s's types match (w/o checking locals) |
79 | |
80 // accessors | |
81 IRScope* scope() const { return _scope; } | |
1819 | 82 ValueStack* caller_state() const { return _caller_state; } |
83 int bci() const { return _bci; } | |
84 Kind kind() const { return _kind; } | |
85 | |
0 | 86 int locals_size() const { return _locals.length(); } |
87 int stack_size() const { return _stack.length(); } | |
88 int locks_size() const { return _locks.length(); } | |
89 bool stack_is_empty() const { return _stack.is_empty(); } | |
90 bool no_active_locks() const { return _locks.is_empty(); } | |
1819 | 91 int total_locks_size() const; |
0 | 92 |
93 // locals access | |
94 void clear_locals(); // sets all locals to NULL; | |
95 | |
96 void invalidate_local(int i) { | |
1819 | 97 assert(_locals.at(i)->type()->is_single_word() || |
98 _locals.at(i + 1) == NULL, "hi-word of doubleword value must be NULL"); | |
0 | 99 _locals.at_put(i, NULL); |
100 } | |
101 | |
1819 | 102 Value local_at(int i) const { |
0 | 103 Value x = _locals.at(i); |
1819 | 104 assert(x == NULL || x->type()->is_single_word() || |
105 _locals.at(i + 1) == NULL, "hi-word of doubleword value must be NULL"); | |
0 | 106 return x; |
107 } | |
108 | |
109 void store_local(int i, Value x) { | |
1819 | 110 // When overwriting local i, check if i - 1 was the start of a |
111 // double word local and kill it. | |
0 | 112 if (i > 0) { |
113 Value prev = _locals.at(i - 1); | |
114 if (prev != NULL && prev->type()->is_double_word()) { | |
115 _locals.at_put(i - 1, NULL); | |
116 } | |
117 } | |
1819 | 118 |
119 _locals.at_put(i, x); | |
120 if (x->type()->is_double_word()) { | |
121 // hi-word of doubleword value is always NULL | |
122 _locals.at_put(i + 1, NULL); | |
123 } | |
0 | 124 } |
125 | |
126 // stack access | |
127 Value stack_at(int i) const { | |
128 Value x = _stack.at(i); | |
129 assert(x->type()->is_single_word() || | |
1819 | 130 _stack.at(i + 1) == NULL, "hi-word of doubleword value must be NULL"); |
0 | 131 return x; |
132 } | |
133 | |
134 Value stack_at_inc(int& i) const { | |
135 Value x = stack_at(i); | |
136 i += x->type()->size(); | |
137 return x; | |
138 } | |
139 | |
140 // pinning support | |
141 void pin_stack_for_linear_scan(); | |
142 | |
143 // iteration | |
1584 | 144 void values_do(ValueVisitor* f); |
0 | 145 |
146 // untyped manipulation (for dup_x1, etc.) | |
147 void truncate_stack(int size) { _stack.trunc_to(size); } | |
148 void raw_push(Value t) { _stack.push(t); } | |
149 Value raw_pop() { return _stack.pop(); } | |
150 | |
151 // typed manipulation | |
152 void ipush(Value t) { _stack.push(check(intTag , t)); } | |
153 void fpush(Value t) { _stack.push(check(floatTag , t)); } | |
154 void apush(Value t) { _stack.push(check(objectTag , t)); } | |
155 void rpush(Value t) { _stack.push(check(addressTag, t)); } | |
156 void lpush(Value t) { _stack.push(check(longTag , t)); _stack.push(NULL); } | |
157 void dpush(Value t) { _stack.push(check(doubleTag , t)); _stack.push(NULL); } | |
158 | |
159 void push(ValueType* type, Value t) { | |
160 switch (type->tag()) { | |
161 case intTag : ipush(t); return; | |
162 case longTag : lpush(t); return; | |
163 case floatTag : fpush(t); return; | |
164 case doubleTag : dpush(t); return; | |
165 case objectTag : apush(t); return; | |
166 case addressTag: rpush(t); return; | |
167 } | |
168 ShouldNotReachHere(); | |
169 } | |
170 | |
171 Value ipop() { return check(intTag , _stack.pop()); } | |
172 Value fpop() { return check(floatTag , _stack.pop()); } | |
173 Value apop() { return check(objectTag , _stack.pop()); } | |
174 Value rpop() { return check(addressTag, _stack.pop()); } | |
175 Value lpop() { Value h = _stack.pop(); return check(longTag , _stack.pop(), h); } | |
176 Value dpop() { Value h = _stack.pop(); return check(doubleTag, _stack.pop(), h); } | |
177 | |
178 Value pop(ValueType* type) { | |
179 switch (type->tag()) { | |
180 case intTag : return ipop(); | |
181 case longTag : return lpop(); | |
182 case floatTag : return fpop(); | |
183 case doubleTag : return dpop(); | |
184 case objectTag : return apop(); | |
185 case addressTag: return rpop(); | |
186 } | |
187 ShouldNotReachHere(); | |
188 return NULL; | |
189 } | |
190 | |
191 Values* pop_arguments(int argument_size); | |
192 | |
193 // locks access | |
1819 | 194 int lock (Value obj); |
0 | 195 int unlock(); |
196 Value lock_at(int i) const { return _locks.at(i); } | |
197 | |
198 // SSA form IR support | |
199 void setup_phi_for_stack(BlockBegin* b, int index); | |
200 void setup_phi_for_local(BlockBegin* b, int index); | |
201 | |
202 // debugging | |
203 void print() PRODUCT_RETURN; | |
204 void verify() PRODUCT_RETURN; | |
205 }; | |
206 | |
207 | |
208 | |
209 // Macro definitions for simple iteration of stack and local values of a ValueStack | |
210 // The macros can be used like a for-loop. All variables (state, index and value) | |
211 // must be defined before the loop. | |
212 // When states are nested because of inlining, the stack of the innermost state | |
213 // cumulates also the stack of the nested states. In contrast, the locals of all | |
214 // states must be iterated each. | |
215 // Use the following code pattern to iterate all stack values and all nested local values: | |
216 // | |
217 // ValueStack* state = ... // state that is iterated | |
218 // int index; // current loop index (overwritten in loop) | |
219 // Value value; // value at current loop index (overwritten in loop) | |
220 // | |
221 // for_each_stack_value(state, index, value { | |
222 // do something with value and index | |
223 // } | |
224 // | |
225 // for_each_state(state) { | |
226 // for_each_local_value(state, index, value) { | |
227 // do something with value and index | |
228 // } | |
229 // } | |
230 // as an invariant, state is NULL now | |
231 | |
232 | |
233 // construct a unique variable name with the line number where the macro is used | |
234 #define temp_var3(x) temp__ ## x | |
235 #define temp_var2(x) temp_var3(x) | |
236 #define temp_var temp_var2(__LINE__) | |
237 | |
238 #define for_each_state(state) \ | |
239 for (; state != NULL; state = state->caller_state()) | |
240 | |
241 #define for_each_local_value(state, index, value) \ | |
242 int temp_var = state->locals_size(); \ | |
243 for (index = 0; \ | |
244 index < temp_var && (value = state->local_at(index), true); \ | |
245 index += (value == NULL || value->type()->is_illegal() ? 1 : value->type()->size())) \ | |
246 if (value != NULL) | |
247 | |
248 | |
249 #define for_each_stack_value(state, index, value) \ | |
250 int temp_var = state->stack_size(); \ | |
251 for (index = 0; \ | |
252 index < temp_var && (value = state->stack_at(index), true); \ | |
253 index += value->type()->size()) | |
254 | |
255 | |
256 #define for_each_lock_value(state, index, value) \ | |
257 int temp_var = state->locks_size(); \ | |
258 for (index = 0; \ | |
259 index < temp_var && (value = state->lock_at(index), true); \ | |
260 index++) \ | |
261 if (value != NULL) | |
262 | |
263 | |
264 // Macro definition for simple iteration of all state values of a ValueStack | |
265 // Because the code cannot be executed in a single loop, the code must be passed | |
266 // as a macro parameter. | |
267 // Use the following code pattern to iterate all stack values and all nested local values: | |
268 // | |
269 // ValueStack* state = ... // state that is iterated | |
270 // for_each_state_value(state, value, | |
271 // do something with value (note that this is a macro parameter) | |
272 // ); | |
273 | |
274 #define for_each_state_value(v_state, v_value, v_code) \ | |
275 { \ | |
276 int cur_index; \ | |
277 ValueStack* cur_state = v_state; \ | |
1819 | 278 Value v_value; \ |
279 for_each_state(cur_state) { \ | |
280 { \ | |
281 for_each_local_value(cur_state, cur_index, v_value) { \ | |
282 v_code; \ | |
283 } \ | |
0 | 284 } \ |
1819 | 285 { \ |
286 for_each_stack_value(cur_state, cur_index, v_value) { \ | |
287 v_code; \ | |
288 } \ | |
289 } \ | |
0 | 290 } \ |
291 } | |
292 | |
293 | |
294 // Macro definition for simple iteration of all phif functions of a block, i.e all | |
295 // phi functions of the ValueStack where the block matches. | |
296 // Use the following code pattern to iterate all phi functions of a block: | |
297 // | |
298 // BlockBegin* block = ... // block that is iterated | |
299 // for_each_phi_function(block, phi, | |
300 // do something with the phi function phi (note that this is a macro parameter) | |
301 // ); | |
302 | |
303 #define for_each_phi_fun(v_block, v_phi, v_code) \ | |
304 { \ | |
305 int cur_index; \ | |
306 ValueStack* cur_state = v_block->state(); \ | |
307 Value value; \ | |
308 { \ | |
309 for_each_stack_value(cur_state, cur_index, value) { \ | |
310 Phi* v_phi = value->as_Phi(); \ | |
311 if (v_phi != NULL && v_phi->block() == v_block) { \ | |
312 v_code; \ | |
313 } \ | |
314 } \ | |
315 } \ | |
316 { \ | |
317 for_each_local_value(cur_state, cur_index, value) { \ | |
318 Phi* v_phi = value->as_Phi(); \ | |
319 if (v_phi != NULL && v_phi->block() == v_block) { \ | |
320 v_code; \ | |
321 } \ | |
322 } \ | |
323 } \ | |
324 } |