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