| File: | jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp |
| Warning: | line 132, column 15 Value stored to 'block' during its initialization is never read |
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| 1 | /* |
| 2 | * Copyright (c) 2012, 2021, Oracle and/or its affiliates. All rights reserved. |
| 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 | * |
| 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| 20 | * or visit www.oracle.com if you need additional information or have any |
| 21 | * questions. |
| 22 | * |
| 23 | */ |
| 24 | |
| 25 | #include "precompiled.hpp" |
| 26 | #include "c1/c1_ValueStack.hpp" |
| 27 | #include "c1/c1_RangeCheckElimination.hpp" |
| 28 | #include "c1/c1_IR.hpp" |
| 29 | #include "c1/c1_Canonicalizer.hpp" |
| 30 | #include "c1/c1_ValueMap.hpp" |
| 31 | #include "ci/ciMethodData.hpp" |
| 32 | #include "runtime/deoptimization.hpp" |
| 33 | #ifdef ASSERT1 |
| 34 | #include "utilities/bitMap.inline.hpp" |
| 35 | #endif |
| 36 | |
| 37 | // Macros for the Trace and the Assertion flag |
| 38 | #ifdef ASSERT1 |
| 39 | #define TRACE_RANGE_CHECK_ELIMINATION(code)if (TraceRangeCheckElimination) { code; } if (TraceRangeCheckElimination) { code; } |
| 40 | #define ASSERT_RANGE_CHECK_ELIMINATION(code)if (AssertRangeCheckElimination) { code; } if (AssertRangeCheckElimination) { code; } |
| 41 | #define TRACE_OR_ASSERT_RANGE_CHECK_ELIMINATION(code)if (TraceRangeCheckElimination || AssertRangeCheckElimination ) { code; } if (TraceRangeCheckElimination || AssertRangeCheckElimination) { code; } |
| 42 | #else |
| 43 | #define TRACE_RANGE_CHECK_ELIMINATION(code)if (TraceRangeCheckElimination) { code; } |
| 44 | #define ASSERT_RANGE_CHECK_ELIMINATION(code)if (AssertRangeCheckElimination) { code; } |
| 45 | #define TRACE_OR_ASSERT_RANGE_CHECK_ELIMINATION(code)if (TraceRangeCheckElimination || AssertRangeCheckElimination ) { code; } |
| 46 | #endif |
| 47 | |
| 48 | // Entry point for the optimization |
| 49 | void RangeCheckElimination::eliminate(IR *ir) { |
| 50 | bool do_elimination = ir->compilation()->has_access_indexed(); |
| 51 | ASSERT_RANGE_CHECK_ELIMINATION(do_elimination = true)if (AssertRangeCheckElimination) { do_elimination = true; }; |
| 52 | if (do_elimination) { |
| 53 | RangeCheckEliminator rce(ir); |
| 54 | } |
| 55 | } |
| 56 | |
| 57 | // Constructor |
| 58 | RangeCheckEliminator::RangeCheckEliminator(IR *ir) : |
| 59 | _bounds(Instruction::number_of_instructions(), Instruction::number_of_instructions(), NULL__null), |
| 60 | _access_indexed_info(Instruction::number_of_instructions(), Instruction::number_of_instructions(), NULL__null) |
| 61 | { |
| 62 | _visitor.set_range_check_eliminator(this); |
| 63 | _ir = ir; |
| 64 | _number_of_instructions = Instruction::number_of_instructions(); |
| 65 | _optimistic = ir->compilation()->is_optimistic(); |
| 66 | |
| 67 | TRACE_RANGE_CHECK_ELIMINATION(if (TraceRangeCheckElimination) { tty->cr(); tty->print_cr ("Range check elimination"); ir->method()->print_name(tty ); tty->cr();; } |
| 68 | tty->cr();if (TraceRangeCheckElimination) { tty->cr(); tty->print_cr ("Range check elimination"); ir->method()->print_name(tty ); tty->cr();; } |
| 69 | tty->print_cr("Range check elimination");if (TraceRangeCheckElimination) { tty->cr(); tty->print_cr ("Range check elimination"); ir->method()->print_name(tty ); tty->cr();; } |
| 70 | ir->method()->print_name(tty);if (TraceRangeCheckElimination) { tty->cr(); tty->print_cr ("Range check elimination"); ir->method()->print_name(tty ); tty->cr();; } |
| 71 | tty->cr();if (TraceRangeCheckElimination) { tty->cr(); tty->print_cr ("Range check elimination"); ir->method()->print_name(tty ); tty->cr();; } |
| 72 | )if (TraceRangeCheckElimination) { tty->cr(); tty->print_cr ("Range check elimination"); ir->method()->print_name(tty ); tty->cr();; }; |
| 73 | |
| 74 | TRACE_RANGE_CHECK_ELIMINATION(if (TraceRangeCheckElimination) { tty->print_cr("optimistic=%d" , (int)_optimistic);; } |
| 75 | tty->print_cr("optimistic=%d", (int)_optimistic);if (TraceRangeCheckElimination) { tty->print_cr("optimistic=%d" , (int)_optimistic);; } |
| 76 | )if (TraceRangeCheckElimination) { tty->print_cr("optimistic=%d" , (int)_optimistic);; }; |
| 77 | |
| 78 | #ifdef ASSERT1 |
| 79 | // Verifies several conditions that must be true on the IR-input. Only used for debugging purposes. |
| 80 | TRACE_RANGE_CHECK_ELIMINATION(if (TraceRangeCheckElimination) { tty->print_cr("Verification of IR . . ." );; } |
| 81 | tty->print_cr("Verification of IR . . .");if (TraceRangeCheckElimination) { tty->print_cr("Verification of IR . . ." );; } |
| 82 | )if (TraceRangeCheckElimination) { tty->print_cr("Verification of IR . . ." );; }; |
| 83 | Verification verification(ir); |
| 84 | #endif |
| 85 | |
| 86 | // Set process block flags |
| 87 | // Optimization so a blocks is only processed if it contains an access indexed instruction or if |
| 88 | // one of its children in the dominator tree contains an access indexed instruction. |
| 89 | set_process_block_flags(ir->start()); |
| 90 | |
| 91 | // Pass over instructions in the dominator tree |
| 92 | TRACE_RANGE_CHECK_ELIMINATION(if (TraceRangeCheckElimination) { tty->print_cr("Starting pass over dominator tree . . ." ); } |
| 93 | tty->print_cr("Starting pass over dominator tree . . .")if (TraceRangeCheckElimination) { tty->print_cr("Starting pass over dominator tree . . ." ); } |
| 94 | )if (TraceRangeCheckElimination) { tty->print_cr("Starting pass over dominator tree . . ." ); }; |
| 95 | calc_bounds(ir->start(), NULL__null); |
| 96 | |
| 97 | TRACE_RANGE_CHECK_ELIMINATION(if (TraceRangeCheckElimination) { tty->print_cr("Finished!" ); } |
| 98 | tty->print_cr("Finished!")if (TraceRangeCheckElimination) { tty->print_cr("Finished!" ); } |
| 99 | )if (TraceRangeCheckElimination) { tty->print_cr("Finished!" ); }; |
| 100 | } |
| 101 | |
| 102 | // Instruction specific work for some instructions |
| 103 | // Constant |
| 104 | void RangeCheckEliminator::Visitor::do_Constant(Constant *c) { |
| 105 | IntConstant *ic = c->type()->as_IntConstant(); |
| 106 | if (ic != NULL__null) { |
| 107 | int value = ic->value(); |
| 108 | _bound = new Bound(value, NULL__null, value, NULL__null); |
| 109 | } |
| 110 | } |
| 111 | |
| 112 | // LogicOp |
| 113 | void RangeCheckEliminator::Visitor::do_LogicOp(LogicOp *lo) { |
| 114 | if (lo->type()->as_IntType() && lo->op() == Bytecodes::_iand && (lo->x()->as_Constant() || lo->y()->as_Constant())) { |
| 115 | int constant = 0; |
| 116 | Constant *c = lo->x()->as_Constant(); |
| 117 | if (c != NULL__null) { |
| 118 | constant = c->type()->as_IntConstant()->value(); |
| 119 | } else { |
| 120 | constant = lo->y()->as_Constant()->type()->as_IntConstant()->value(); |
| 121 | } |
| 122 | if (constant >= 0) { |
| 123 | _bound = new Bound(0, NULL__null, constant, NULL__null); |
| 124 | } |
| 125 | } |
| 126 | } |
| 127 | |
| 128 | // Phi |
| 129 | void RangeCheckEliminator::Visitor::do_Phi(Phi *phi) { |
| 130 | if (!phi->type()->as_IntType() && !phi->type()->as_ObjectType()) return; |
| 131 | |
| 132 | BlockBegin *block = phi->block(); |
Value stored to 'block' during its initialization is never read | |
| 133 | int op_count = phi->operand_count(); |
| 134 | bool has_upper = true; |
| 135 | bool has_lower = true; |
| 136 | assert(phi, "Phi must not be null")do { if (!(phi)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 136, "assert(" "phi" ") failed", "Phi must not be null"); :: breakpoint(); } } while (0); |
| 137 | Bound *bound = NULL__null; |
| 138 | |
| 139 | // TODO: support more difficult phis |
| 140 | for (int i=0; i<op_count; i++) { |
| 141 | Value v = phi->operand_at(i); |
| 142 | |
| 143 | if (v == phi) continue; |
| 144 | |
| 145 | // Check if instruction is connected with phi itself |
| 146 | Op2 *op2 = v->as_Op2(); |
| 147 | if (op2 != NULL__null) { |
| 148 | Value x = op2->x(); |
| 149 | Value y = op2->y(); |
| 150 | if ((x == phi || y == phi)) { |
| 151 | Value other = x; |
| 152 | if (other == phi) { |
| 153 | other = y; |
| 154 | } |
| 155 | ArithmeticOp *ao = v->as_ArithmeticOp(); |
| 156 | if (ao != NULL__null && ao->op() == Bytecodes::_iadd) { |
| 157 | assert(ao->op() == Bytecodes::_iadd, "Has to be add!")do { if (!(ao->op() == Bytecodes::_iadd)) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 157, "assert(" "ao->op() == Bytecodes::_iadd" ") failed" , "Has to be add!"); ::breakpoint(); } } while (0); |
| 158 | if (ao->type()->as_IntType()) { |
| 159 | Constant *c = other->as_Constant(); |
| 160 | if (c != NULL__null) { |
| 161 | assert(c->type()->as_IntConstant(), "Constant has to be of type integer")do { if (!(c->type()->as_IntConstant())) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 161, "assert(" "c->type()->as_IntConstant()" ") failed" , "Constant has to be of type integer"); ::breakpoint(); } } while (0); |
| 162 | int value = c->type()->as_IntConstant()->value(); |
| 163 | if (value == 1) { |
| 164 | has_upper = false; |
| 165 | } else if (value > 1) { |
| 166 | // Overflow not guaranteed |
| 167 | has_upper = false; |
| 168 | has_lower = false; |
| 169 | } else if (value < 0) { |
| 170 | has_lower = false; |
| 171 | } |
| 172 | continue; |
| 173 | } |
| 174 | } |
| 175 | } |
| 176 | } |
| 177 | } |
| 178 | |
| 179 | // No connection -> new bound |
| 180 | Bound *v_bound = _rce->get_bound(v); |
| 181 | Bound *cur_bound; |
| 182 | int cur_constant = 0; |
| 183 | Value cur_value = v; |
| 184 | |
| 185 | if (v->type()->as_IntConstant()) { |
| 186 | cur_constant = v->type()->as_IntConstant()->value(); |
| 187 | cur_value = NULL__null; |
| 188 | } |
| 189 | if (!v_bound->has_upper() || !v_bound->has_lower()) { |
| 190 | cur_bound = new Bound(cur_constant, cur_value, cur_constant, cur_value); |
| 191 | } else { |
| 192 | cur_bound = v_bound; |
| 193 | } |
| 194 | if (cur_bound) { |
| 195 | if (!bound) { |
| 196 | bound = cur_bound->copy(); |
| 197 | } else { |
| 198 | bound->or_op(cur_bound); |
| 199 | } |
| 200 | } else { |
| 201 | // No bound! |
| 202 | bound = NULL__null; |
| 203 | break; |
| 204 | } |
| 205 | } |
| 206 | |
| 207 | if (bound) { |
| 208 | if (!has_upper) { |
| 209 | bound->remove_upper(); |
| 210 | } |
| 211 | if (!has_lower) { |
| 212 | bound->remove_lower(); |
| 213 | } |
| 214 | _bound = bound; |
| 215 | } else { |
| 216 | _bound = new Bound(); |
| 217 | } |
| 218 | } |
| 219 | |
| 220 | |
| 221 | // ArithmeticOp |
| 222 | void RangeCheckEliminator::Visitor::do_ArithmeticOp(ArithmeticOp *ao) { |
| 223 | Value x = ao->x(); |
| 224 | Value y = ao->y(); |
| 225 | |
| 226 | if (ao->op() == Bytecodes::_irem) { |
| 227 | Bound* x_bound = _rce->get_bound(x); |
| 228 | Bound* y_bound = _rce->get_bound(y); |
| 229 | if (x_bound->lower() >= 0 && x_bound->lower_instr() == NULL__null && y->as_ArrayLength() != NULL__null) { |
| 230 | _bound = new Bound(0, NULL__null, -1, y); |
| 231 | } else if (y->type()->as_IntConstant() && y->type()->as_IntConstant()->value() != 0) { |
| 232 | // The binary % operator is said to yield the remainder of its operands from an implied division; the |
| 233 | // left-hand operand is the dividend and the right-hand operand is the divisor. |
| 234 | // |
| 235 | // % operator follows from this rule that the result of the remainder operation can be negative only |
| 236 | // if the dividend is negative, and can be positive only if the dividend is positive. Moreover, the |
| 237 | // magnitude of the result is always less than the magnitude of the divisor(See JLS 15.17.3). |
| 238 | // |
| 239 | // So if y is a constant integer and not equal to 0, then we can deduce the bound of remainder operation: |
| 240 | // x % -y ==> [0, y - 1] Apply RCE |
| 241 | // x % y ==> [0, y - 1] Apply RCE |
| 242 | // -x % y ==> [-y + 1, 0] |
| 243 | // -x % -y ==> [-y + 1, 0] |
| 244 | if (x_bound->has_lower() && x_bound->lower() >= 0) { |
| 245 | _bound = new Bound(0, NULL__null, y->type()->as_IntConstant()->value() - 1, NULL__null); |
| 246 | } else { |
| 247 | _bound = new Bound(); |
| 248 | } |
| 249 | } else { |
| 250 | _bound = new Bound(); |
| 251 | } |
| 252 | } else if (!x->as_Constant() || !y->as_Constant()) { |
| 253 | assert(!x->as_Constant() || !y->as_Constant(), "One of the operands must be non-constant!")do { if (!(!x->as_Constant() || !y->as_Constant())) { ( *g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 253, "assert(" "!x->as_Constant() || !y->as_Constant()" ") failed", "One of the operands must be non-constant!"); :: breakpoint(); } } while (0); |
| 254 | if (((x->as_Constant() || y->as_Constant()) && (ao->op() == Bytecodes::_iadd)) || (y->as_Constant() && ao->op() == Bytecodes::_isub)) { |
| 255 | assert(ao->op() == Bytecodes::_iadd || ao->op() == Bytecodes::_isub, "Operand must be iadd or isub")do { if (!(ao->op() == Bytecodes::_iadd || ao->op() == Bytecodes ::_isub)) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 255, "assert(" "ao->op() == Bytecodes::_iadd || ao->op() == Bytecodes::_isub" ") failed", "Operand must be iadd or isub"); ::breakpoint(); } } while (0); |
| 256 | |
| 257 | if (y->as_Constant()) { |
| 258 | Value tmp = x; |
| 259 | x = y; |
| 260 | y = tmp; |
| 261 | } |
| 262 | assert(x->as_Constant()->type()->as_IntConstant(), "Constant must be int constant!")do { if (!(x->as_Constant()->type()->as_IntConstant( ))) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 262, "assert(" "x->as_Constant()->type()->as_IntConstant()" ") failed", "Constant must be int constant!"); ::breakpoint( ); } } while (0); |
| 263 | |
| 264 | // Constant now in x |
| 265 | int const_value = x->as_Constant()->type()->as_IntConstant()->value(); |
| 266 | if (ao->op() == Bytecodes::_iadd || const_value != min_jint) { |
| 267 | if (ao->op() == Bytecodes::_isub) { |
| 268 | const_value = -const_value; |
| 269 | } |
| 270 | |
| 271 | Bound * bound = _rce->get_bound(y); |
| 272 | if (bound->has_upper() && bound->has_lower()) { |
| 273 | int new_lower = bound->lower() + const_value; |
| 274 | jlong new_lowerl = ((jlong)bound->lower()) + const_value; |
| 275 | int new_upper = bound->upper() + const_value; |
| 276 | jlong new_upperl = ((jlong)bound->upper()) + const_value; |
| 277 | |
| 278 | if (((jlong)new_lower) == new_lowerl && ((jlong)new_upper == new_upperl)) { |
| 279 | Bound *newBound = new Bound(new_lower, bound->lower_instr(), new_upper, bound->upper_instr()); |
| 280 | _bound = newBound; |
| 281 | } else { |
| 282 | // overflow |
| 283 | _bound = new Bound(); |
| 284 | } |
| 285 | } else { |
| 286 | _bound = new Bound(); |
| 287 | } |
| 288 | } else { |
| 289 | _bound = new Bound(); |
| 290 | } |
| 291 | } else { |
| 292 | Bound *bound = _rce->get_bound(x); |
| 293 | if (ao->op() == Bytecodes::_isub) { |
| 294 | if (bound->lower_instr() == y) { |
| 295 | _bound = new Bound(Instruction::geq, NULL__null, bound->lower()); |
| 296 | } else { |
| 297 | _bound = new Bound(); |
| 298 | } |
| 299 | } else { |
| 300 | _bound = new Bound(); |
| 301 | } |
| 302 | } |
| 303 | } |
| 304 | } |
| 305 | |
| 306 | // IfOp |
| 307 | void RangeCheckEliminator::Visitor::do_IfOp(IfOp *ifOp) |
| 308 | { |
| 309 | if (ifOp->tval()->type()->as_IntConstant() && ifOp->fval()->type()->as_IntConstant()) { |
| 310 | int min = ifOp->tval()->type()->as_IntConstant()->value(); |
| 311 | int max = ifOp->fval()->type()->as_IntConstant()->value(); |
| 312 | if (min > max) { |
| 313 | // min ^= max ^= min ^= max; |
| 314 | int tmp = min; |
| 315 | min = max; |
| 316 | max = tmp; |
| 317 | } |
| 318 | _bound = new Bound(min, NULL__null, max, NULL__null); |
| 319 | } |
| 320 | } |
| 321 | |
| 322 | // Get bound. Returns the current bound on Value v. Normally this is the topmost element on the bound stack. |
| 323 | RangeCheckEliminator::Bound *RangeCheckEliminator::get_bound(Value v) { |
| 324 | // Wrong type or NULL -> No bound |
| 325 | if (!v || (!v->type()->as_IntType() && !v->type()->as_ObjectType())) return NULL__null; |
| 326 | |
| 327 | if (!_bounds.at(v->id())) { |
| 328 | // First (default) bound is calculated |
| 329 | // Create BoundStack |
| 330 | _bounds.at_put(v->id(), new BoundStack()); |
| 331 | _visitor.clear_bound(); |
| 332 | Value visit_value = v; |
| 333 | visit_value->visit(&_visitor); |
| 334 | Bound *bound = _visitor.bound(); |
| 335 | if (bound) { |
| 336 | _bounds.at(v->id())->push(bound); |
| 337 | } |
| 338 | if (_bounds.at(v->id())->length() == 0) { |
| 339 | assert(!(v->as_Constant() && v->type()->as_IntConstant()), "constants not handled here")do { if (!(!(v->as_Constant() && v->type()-> as_IntConstant()))) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 339, "assert(" "!(v->as_Constant() && v->type()->as_IntConstant())" ") failed", "constants not handled here"); ::breakpoint(); } } while (0); |
| 340 | _bounds.at(v->id())->push(new Bound()); |
| 341 | } |
| 342 | } else if (_bounds.at(v->id())->length() == 0) { |
| 343 | // To avoid endless loops, bound is currently in calculation -> nothing known about it |
| 344 | return new Bound(); |
| 345 | } |
| 346 | |
| 347 | // Return bound |
| 348 | return _bounds.at(v->id())->top(); |
| 349 | } |
| 350 | |
| 351 | // Update bound |
| 352 | void RangeCheckEliminator::update_bound(IntegerStack &pushed, Value v, Instruction::Condition cond, Value value, int constant) { |
| 353 | if (cond == Instruction::gtr) { |
| 354 | cond = Instruction::geq; |
| 355 | constant++; |
| 356 | } else if (cond == Instruction::lss) { |
| 357 | cond = Instruction::leq; |
| 358 | constant--; |
| 359 | } |
| 360 | Bound *bound = new Bound(cond, value, constant); |
| 361 | update_bound(pushed, v, bound); |
| 362 | } |
| 363 | |
| 364 | // Checks for loop invariance. Returns true if the instruction is outside of the loop which is identified by loop_header. |
| 365 | bool RangeCheckEliminator::loop_invariant(BlockBegin *loop_header, Instruction *instruction) { |
| 366 | assert(loop_header, "Loop header must not be null!")do { if (!(loop_header)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 366, "assert(" "loop_header" ") failed", "Loop header must not be null!" ); ::breakpoint(); } } while (0); |
| 367 | if (!instruction) return true; |
| 368 | return instruction->dominator_depth() < loop_header->dominator_depth(); |
| 369 | } |
| 370 | |
| 371 | // Update bound. Pushes a new bound onto the stack. Tries to do a conjunction with the current bound. |
| 372 | void RangeCheckEliminator::update_bound(IntegerStack &pushed, Value v, Bound *bound) { |
| 373 | if (v->as_Constant()) { |
| 374 | // No bound update for constants |
| 375 | return; |
| 376 | } |
| 377 | if (!_bounds.at(v->id())) { |
| 378 | get_bound(v); |
| 379 | assert(_bounds.at(v->id()), "Now Stack must exist")do { if (!(_bounds.at(v->id()))) { (*g_assert_poison) = 'X' ;; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 379, "assert(" "_bounds.at(v->id())" ") failed", "Now Stack must exist" ); ::breakpoint(); } } while (0); |
| 380 | } |
| 381 | Bound *top = NULL__null; |
| 382 | if (_bounds.at(v->id())->length() > 0) { |
| 383 | top = _bounds.at(v->id())->top(); |
| 384 | } |
| 385 | if (top) { |
| 386 | bound->and_op(top); |
| 387 | } |
| 388 | _bounds.at(v->id())->push(bound); |
| 389 | pushed.append(v->id()); |
| 390 | } |
| 391 | |
| 392 | // Add instruction + idx for in block motion |
| 393 | void RangeCheckEliminator::add_access_indexed_info(InstructionList &indices, int idx, Value instruction, AccessIndexed *ai) { |
| 394 | int id = instruction->id(); |
| 395 | AccessIndexedInfo *aii = _access_indexed_info.at(id); |
| 396 | if (aii == NULL__null) { |
| 397 | aii = new AccessIndexedInfo(); |
| 398 | _access_indexed_info.at_put(id, aii); |
| 399 | indices.append(instruction); |
| 400 | aii->_min = idx; |
| 401 | aii->_max = idx; |
| 402 | aii->_list = new AccessIndexedList(); |
| 403 | } else if (idx >= aii->_min && idx <= aii->_max) { |
| 404 | remove_range_check(ai); |
| 405 | return; |
| 406 | } |
| 407 | aii->_min = MIN2(aii->_min, idx); |
| 408 | aii->_max = MAX2(aii->_max, idx); |
| 409 | aii->_list->append(ai); |
| 410 | } |
| 411 | |
| 412 | // In block motion. Tries to reorder checks in order to reduce some of them. |
| 413 | // Example: |
| 414 | // a[i] = 0; |
| 415 | // a[i+2] = 0; |
| 416 | // a[i+1] = 0; |
| 417 | // In this example the check for a[i+1] would be considered as unnecessary during the first iteration. |
| 418 | // After this i is only checked once for i >= 0 and i+2 < a.length before the first array access. If this |
| 419 | // check fails, deoptimization is called. |
| 420 | void RangeCheckEliminator::in_block_motion(BlockBegin *block, AccessIndexedList &accessIndexed, InstructionList &arrays) { |
| 421 | InstructionList indices; |
| 422 | |
| 423 | // Now iterate over all arrays |
| 424 | for (int i=0; i<arrays.length(); i++) { |
| 425 | int max_constant = -1; |
| 426 | AccessIndexedList list_constant; |
| 427 | Value array = arrays.at(i); |
| 428 | |
| 429 | // For all AccessIndexed-instructions in this block concerning the current array. |
| 430 | for(int j=0; j<accessIndexed.length(); j++) { |
| 431 | AccessIndexed *ai = accessIndexed.at(j); |
| 432 | if (ai->array() != array || !ai->check_flag(Instruction::NeedsRangeCheckFlag)) continue; |
| 433 | |
| 434 | Value index = ai->index(); |
| 435 | Constant *c = index->as_Constant(); |
| 436 | if (c != NULL__null) { |
| 437 | int constant_value = c->type()->as_IntConstant()->value(); |
| 438 | if (constant_value >= 0) { |
| 439 | if (constant_value <= max_constant) { |
| 440 | // No range check needed for this |
| 441 | remove_range_check(ai); |
| 442 | } else { |
| 443 | max_constant = constant_value; |
| 444 | list_constant.append(ai); |
| 445 | } |
| 446 | } |
| 447 | } else { |
| 448 | int last_integer = 0; |
| 449 | Instruction *last_instruction = index; |
| 450 | int base = 0; |
| 451 | ArithmeticOp *ao = index->as_ArithmeticOp(); |
| 452 | |
| 453 | while (ao != NULL__null && (ao->x()->as_Constant() || ao->y()->as_Constant()) && (ao->op() == Bytecodes::_iadd || ao->op() == Bytecodes::_isub)) { |
| 454 | c = ao->y()->as_Constant(); |
| 455 | Instruction *other = ao->x(); |
| 456 | if (!c && ao->op() == Bytecodes::_iadd) { |
| 457 | c = ao->x()->as_Constant(); |
| 458 | other = ao->y(); |
| 459 | } |
| 460 | |
| 461 | if (c) { |
| 462 | int value = c->type()->as_IntConstant()->value(); |
| 463 | if (value != min_jint) { |
| 464 | if (ao->op() == Bytecodes::_isub) { |
| 465 | value = -value; |
| 466 | } |
| 467 | base += value; |
| 468 | last_integer = base; |
| 469 | last_instruction = other; |
| 470 | } |
| 471 | index = other; |
| 472 | } else { |
| 473 | break; |
| 474 | } |
| 475 | ao = index->as_ArithmeticOp(); |
| 476 | } |
| 477 | add_access_indexed_info(indices, last_integer, last_instruction, ai); |
| 478 | } |
| 479 | } |
| 480 | |
| 481 | // Iterate over all different indices |
| 482 | if (_optimistic) { |
| 483 | for (int i = 0; i < indices.length(); i++) { |
| 484 | Instruction *index_instruction = indices.at(i); |
| 485 | AccessIndexedInfo *info = _access_indexed_info.at(index_instruction->id()); |
| 486 | assert(info != NULL, "Info must not be null")do { if (!(info != __null)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 486, "assert(" "info != __null" ") failed", "Info must not be null" ); ::breakpoint(); } } while (0); |
| 487 | |
| 488 | // if idx < 0, max > 0, max + idx may fall between 0 and |
| 489 | // length-1 and if min < 0, min + idx may overflow and be >= |
| 490 | // 0. The predicate wouldn't trigger but some accesses could |
| 491 | // be with a negative index. This test guarantees that for the |
| 492 | // min and max value that are kept the predicate can't let |
| 493 | // some incorrect accesses happen. |
| 494 | bool range_cond = (info->_max < 0 || info->_max + min_jint <= info->_min); |
| 495 | |
| 496 | // Generate code only if more than 2 range checks can be eliminated because of that. |
| 497 | // 2 because at least 2 comparisons are done |
| 498 | if (info->_list->length() > 2 && range_cond) { |
| 499 | AccessIndexed *first = info->_list->at(0); |
| 500 | Instruction *insert_position = first->prev(); |
| 501 | assert(insert_position->next() == first, "prev was calculated")do { if (!(insert_position->next() == first)) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 501, "assert(" "insert_position->next() == first" ") failed" , "prev was calculated"); ::breakpoint(); } } while (0); |
| 502 | ValueStack *state = first->state_before(); |
| 503 | |
| 504 | // Load min Constant |
| 505 | Constant *min_constant = NULL__null; |
| 506 | if (info->_min != 0) { |
| 507 | min_constant = new Constant(new IntConstant(info->_min)); |
| 508 | NOT_PRODUCT(min_constant->set_printable_bci(first->printable_bci()))min_constant->set_printable_bci(first->printable_bci()); |
| 509 | insert_position = insert_position->insert_after(min_constant); |
| 510 | } |
| 511 | |
| 512 | // Load max Constant |
| 513 | Constant *max_constant = NULL__null; |
| 514 | if (info->_max != 0) { |
| 515 | max_constant = new Constant(new IntConstant(info->_max)); |
| 516 | NOT_PRODUCT(max_constant->set_printable_bci(first->printable_bci()))max_constant->set_printable_bci(first->printable_bci()); |
| 517 | insert_position = insert_position->insert_after(max_constant); |
| 518 | } |
| 519 | |
| 520 | // Load array length |
| 521 | Value length_instr = first->length(); |
| 522 | if (!length_instr) { |
| 523 | ArrayLength *length = new ArrayLength(array, first->state_before()->copy()); |
| 524 | length->set_exception_state(length->state_before()); |
| 525 | length->set_flag(Instruction::DeoptimizeOnException, true); |
| 526 | insert_position = insert_position->insert_after_same_bci(length); |
| 527 | length_instr = length; |
| 528 | } |
| 529 | |
| 530 | // Calculate lower bound |
| 531 | Instruction *lower_compare = index_instruction; |
| 532 | if (min_constant) { |
| 533 | ArithmeticOp *ao = new ArithmeticOp(Bytecodes::_iadd, min_constant, lower_compare, NULL__null); |
| 534 | insert_position = insert_position->insert_after_same_bci(ao); |
| 535 | lower_compare = ao; |
| 536 | } |
| 537 | |
| 538 | // Calculate upper bound |
| 539 | Instruction *upper_compare = index_instruction; |
| 540 | if (max_constant) { |
| 541 | ArithmeticOp *ao = new ArithmeticOp(Bytecodes::_iadd, max_constant, upper_compare, NULL__null); |
| 542 | insert_position = insert_position->insert_after_same_bci(ao); |
| 543 | upper_compare = ao; |
| 544 | } |
| 545 | |
| 546 | // Trick with unsigned compare is done |
| 547 | int bci = NOT_PRODUCT(first->printable_bci())first->printable_bci() PRODUCT_ONLY(-1); |
| 548 | insert_position = predicate(upper_compare, Instruction::aeq, length_instr, state, insert_position, bci); |
| 549 | insert_position = predicate_cmp_with_const(lower_compare, Instruction::leq, -1, state, insert_position); |
| 550 | for (int j = 0; j<info->_list->length(); j++) { |
| 551 | AccessIndexed *ai = info->_list->at(j); |
| 552 | remove_range_check(ai); |
| 553 | } |
| 554 | } |
| 555 | } |
| 556 | |
| 557 | if (list_constant.length() > 1) { |
| 558 | AccessIndexed *first = list_constant.at(0); |
| 559 | Instruction *insert_position = first->prev(); |
| 560 | ValueStack *state = first->state_before(); |
| 561 | // Load max Constant |
| 562 | Constant *constant = new Constant(new IntConstant(max_constant)); |
| 563 | NOT_PRODUCT(constant->set_printable_bci(first->printable_bci()))constant->set_printable_bci(first->printable_bci()); |
| 564 | insert_position = insert_position->insert_after(constant); |
| 565 | Instruction *compare_instr = constant; |
| 566 | Value length_instr = first->length(); |
| 567 | if (!length_instr) { |
| 568 | ArrayLength *length = new ArrayLength(array, state->copy()); |
| 569 | length->set_exception_state(length->state_before()); |
| 570 | length->set_flag(Instruction::DeoptimizeOnException, true); |
| 571 | insert_position = insert_position->insert_after_same_bci(length); |
| 572 | length_instr = length; |
| 573 | } |
| 574 | // Compare for greater or equal to array length |
| 575 | insert_position = predicate(compare_instr, Instruction::geq, length_instr, state, insert_position); |
| 576 | for (int j = 0; j<list_constant.length(); j++) { |
| 577 | AccessIndexed *ai = list_constant.at(j); |
| 578 | remove_range_check(ai); |
| 579 | } |
| 580 | } |
| 581 | } |
| 582 | |
| 583 | // Clear data structures for next array |
| 584 | for (int i = 0; i < indices.length(); i++) { |
| 585 | Instruction *index_instruction = indices.at(i); |
| 586 | _access_indexed_info.at_put(index_instruction->id(), NULL__null); |
| 587 | } |
| 588 | indices.clear(); |
| 589 | } |
| 590 | } |
| 591 | |
| 592 | bool RangeCheckEliminator::set_process_block_flags(BlockBegin *block) { |
| 593 | Instruction *cur = block; |
| 594 | bool process = false; |
| 595 | |
| 596 | while (cur) { |
| 597 | process |= (cur->as_AccessIndexed() != NULL__null); |
| 598 | cur = cur->next(); |
| 599 | } |
| 600 | |
| 601 | BlockList *dominates = block->dominates(); |
| 602 | for (int i=0; i<dominates->length(); i++) { |
| 603 | BlockBegin *next = dominates->at(i); |
| 604 | process |= set_process_block_flags(next); |
| 605 | } |
| 606 | |
| 607 | if (!process) { |
| 608 | block->set(BlockBegin::donot_eliminate_range_checks); |
| 609 | } |
| 610 | return process; |
| 611 | } |
| 612 | |
| 613 | bool RangeCheckEliminator::is_ok_for_deoptimization(Instruction *insert_position, Instruction *array_instr, Instruction *length_instr, Instruction *lower_instr, int lower, Instruction *upper_instr, int upper) { |
| 614 | bool upper_check = true; |
| 615 | assert(lower_instr || lower >= 0, "If no lower_instr present, lower must be greater 0")do { if (!(lower_instr || lower >= 0)) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 615, "assert(" "lower_instr || lower >= 0" ") failed", "If no lower_instr present, lower must be greater 0" ); ::breakpoint(); } } while (0); |
| 616 | assert(!lower_instr || lower_instr->dominator_depth() <= insert_position->dominator_depth(), "Dominator depth must be smaller")do { if (!(!lower_instr || lower_instr->dominator_depth() <= insert_position->dominator_depth())) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 616, "assert(" "!lower_instr || lower_instr->dominator_depth() <= insert_position->dominator_depth()" ") failed", "Dominator depth must be smaller"); ::breakpoint (); } } while (0); |
| 617 | assert(!upper_instr || upper_instr->dominator_depth() <= insert_position->dominator_depth(), "Dominator depth must be smaller")do { if (!(!upper_instr || upper_instr->dominator_depth() <= insert_position->dominator_depth())) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 617, "assert(" "!upper_instr || upper_instr->dominator_depth() <= insert_position->dominator_depth()" ") failed", "Dominator depth must be smaller"); ::breakpoint (); } } while (0); |
| 618 | assert(array_instr, "Array instruction must exist")do { if (!(array_instr)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 618, "assert(" "array_instr" ") failed", "Array instruction must exist" ); ::breakpoint(); } } while (0); |
| 619 | assert(array_instr->dominator_depth() <= insert_position->dominator_depth(), "Dominator depth must be smaller")do { if (!(array_instr->dominator_depth() <= insert_position ->dominator_depth())) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 619, "assert(" "array_instr->dominator_depth() <= insert_position->dominator_depth()" ") failed", "Dominator depth must be smaller"); ::breakpoint (); } } while (0); |
| 620 | assert(!length_instr || length_instr->dominator_depth() <= insert_position->dominator_depth(), "Dominator depth must be smaller")do { if (!(!length_instr || length_instr->dominator_depth( ) <= insert_position->dominator_depth())) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 620, "assert(" "!length_instr || length_instr->dominator_depth() <= insert_position->dominator_depth()" ") failed", "Dominator depth must be smaller"); ::breakpoint (); } } while (0); |
| 621 | |
| 622 | if (upper_instr && upper_instr->as_ArrayLength() && upper_instr->as_ArrayLength()->array() == array_instr) { |
| 623 | // static check |
| 624 | if (upper >= 0) return false; // would always trigger a deopt: |
| 625 | // array_length + x >= array_length, x >= 0 is always true |
| 626 | upper_check = false; |
| 627 | } |
| 628 | if (lower_instr && lower_instr->as_ArrayLength() && lower_instr->as_ArrayLength()->array() == array_instr) { |
| 629 | if (lower > 0) return false; |
| 630 | } |
| 631 | // No upper check required -> skip |
| 632 | if (upper_check && upper_instr && upper_instr->type()->as_ObjectType() && upper_instr == array_instr) { |
| 633 | // upper_instr is object means that the upper bound is the length |
| 634 | // of the upper_instr. |
| 635 | return false; |
| 636 | } |
| 637 | return true; |
| 638 | } |
| 639 | |
| 640 | Instruction* RangeCheckEliminator::insert_after(Instruction* insert_position, Instruction* instr, int bci) { |
| 641 | if (bci != -1) { |
| 642 | NOT_PRODUCT(instr->set_printable_bci(bci))instr->set_printable_bci(bci); |
| 643 | return insert_position->insert_after(instr); |
| 644 | } else { |
| 645 | return insert_position->insert_after_same_bci(instr); |
| 646 | } |
| 647 | } |
| 648 | |
| 649 | Instruction* RangeCheckEliminator::predicate(Instruction* left, Instruction::Condition cond, Instruction* right, ValueStack* state, Instruction *insert_position, int bci) { |
| 650 | RangeCheckPredicate *deoptimize = new RangeCheckPredicate(left, cond, true, right, state->copy()); |
| 651 | return insert_after(insert_position, deoptimize, bci); |
| 652 | } |
| 653 | |
| 654 | Instruction* RangeCheckEliminator::predicate_cmp_with_const(Instruction* instr, Instruction::Condition cond, int constant, ValueStack* state, Instruction *insert_position, int bci) { |
| 655 | Constant *const_instr = new Constant(new IntConstant(constant)); |
| 656 | insert_position = insert_after(insert_position, const_instr, bci); |
| 657 | return predicate(instr, cond, const_instr, state, insert_position); |
| 658 | } |
| 659 | |
| 660 | Instruction* RangeCheckEliminator::predicate_add(Instruction* left, int left_const, Instruction::Condition cond, Instruction* right, ValueStack* state, Instruction *insert_position, int bci) { |
| 661 | Constant *constant = new Constant(new IntConstant(left_const)); |
| 662 | insert_position = insert_after(insert_position, constant, bci); |
| 663 | ArithmeticOp *ao = new ArithmeticOp(Bytecodes::_iadd, constant, left, NULL__null); |
| 664 | insert_position = insert_position->insert_after_same_bci(ao); |
| 665 | return predicate(ao, cond, right, state, insert_position); |
| 666 | } |
| 667 | |
| 668 | Instruction* RangeCheckEliminator::predicate_add_cmp_with_const(Instruction* left, int left_const, Instruction::Condition cond, int constant, ValueStack* state, Instruction *insert_position, int bci) { |
| 669 | Constant *const_instr = new Constant(new IntConstant(constant)); |
| 670 | insert_position = insert_after(insert_position, const_instr, bci); |
| 671 | return predicate_add(left, left_const, cond, const_instr, state, insert_position); |
| 672 | } |
| 673 | |
| 674 | // Insert deoptimization |
| 675 | void RangeCheckEliminator::insert_deoptimization(ValueStack *state, Instruction *insert_position, Instruction *array_instr, Instruction *length_instr, Instruction *lower_instr, int lower, Instruction *upper_instr, int upper, AccessIndexed *ai) { |
| 676 | assert(is_ok_for_deoptimization(insert_position, array_instr, length_instr, lower_instr, lower, upper_instr, upper), "should have been tested before")do { if (!(is_ok_for_deoptimization(insert_position, array_instr , length_instr, lower_instr, lower, upper_instr, upper))) { ( *g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 676, "assert(" "is_ok_for_deoptimization(insert_position, array_instr, length_instr, lower_instr, lower, upper_instr, upper)" ") failed", "should have been tested before"); ::breakpoint( ); } } while (0); |
| 677 | bool upper_check = !(upper_instr && upper_instr->as_ArrayLength() && upper_instr->as_ArrayLength()->array() == array_instr); |
| 678 | |
| 679 | int bci = NOT_PRODUCT(ai->printable_bci())ai->printable_bci() PRODUCT_ONLY(-1); |
| 680 | if (lower_instr) { |
| 681 | assert(!lower_instr->type()->as_ObjectType(), "Must not be object type")do { if (!(!lower_instr->type()->as_ObjectType())) { (* g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 681, "assert(" "!lower_instr->type()->as_ObjectType()" ") failed", "Must not be object type"); ::breakpoint(); } } while (0); |
| 682 | if (lower == 0) { |
| 683 | // Compare for less than 0 |
| 684 | insert_position = predicate_cmp_with_const(lower_instr, Instruction::lss, 0, state, insert_position, bci); |
| 685 | } else if (lower > 0) { |
| 686 | // Compare for smaller 0 |
| 687 | insert_position = predicate_add_cmp_with_const(lower_instr, lower, Instruction::lss, 0, state, insert_position, bci); |
| 688 | } else { |
| 689 | assert(lower < 0, "")do { if (!(lower < 0)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 689, "assert(" "lower < 0" ") failed", ""); ::breakpoint (); } } while (0); |
| 690 | // Add 1 |
| 691 | lower++; |
| 692 | lower = -lower; |
| 693 | // Compare for smaller or equal 0 |
| 694 | insert_position = predicate_cmp_with_const(lower_instr, Instruction::leq, lower, state, insert_position, bci); |
| 695 | } |
| 696 | } |
| 697 | |
| 698 | // No upper check required -> skip |
| 699 | if (!upper_check) return; |
| 700 | |
| 701 | // We need to know length of array |
| 702 | if (!length_instr) { |
| 703 | // Load length if necessary |
| 704 | ArrayLength *length = new ArrayLength(array_instr, state->copy()); |
| 705 | NOT_PRODUCT(length->set_printable_bci(ai->printable_bci()))length->set_printable_bci(ai->printable_bci()); |
| 706 | length->set_exception_state(length->state_before()); |
| 707 | length->set_flag(Instruction::DeoptimizeOnException, true); |
| 708 | insert_position = insert_position->insert_after(length); |
| 709 | length_instr = length; |
| 710 | } |
| 711 | |
| 712 | if (!upper_instr) { |
| 713 | // Compare for geq array.length |
| 714 | insert_position = predicate_cmp_with_const(length_instr, Instruction::leq, upper, state, insert_position, bci); |
| 715 | } else { |
| 716 | if (upper_instr->type()->as_ObjectType()) { |
| 717 | assert(state, "must not be null")do { if (!(state)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 717, "assert(" "state" ") failed", "must not be null"); ::breakpoint (); } } while (0); |
| 718 | assert(upper_instr != array_instr, "should be")do { if (!(upper_instr != array_instr)) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 718, "assert(" "upper_instr != array_instr" ") failed", "should be" ); ::breakpoint(); } } while (0); |
| 719 | ArrayLength *length = new ArrayLength(upper_instr, state->copy()); |
| 720 | NOT_PRODUCT(length->set_printable_bci(ai->printable_bci()))length->set_printable_bci(ai->printable_bci()); |
| 721 | length->set_flag(Instruction::DeoptimizeOnException, true); |
| 722 | length->set_exception_state(length->state_before()); |
| 723 | insert_position = insert_position->insert_after(length); |
| 724 | upper_instr = length; |
| 725 | } |
| 726 | assert(upper_instr->type()->as_IntType(), "Must not be object type!")do { if (!(upper_instr->type()->as_IntType())) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 726, "assert(" "upper_instr->type()->as_IntType()" ") failed" , "Must not be object type!"); ::breakpoint(); } } while (0); |
| 727 | |
| 728 | if (upper == 0) { |
| 729 | // Compare for geq array.length |
| 730 | insert_position = predicate(upper_instr, Instruction::geq, length_instr, state, insert_position, bci); |
| 731 | } else if (upper < 0) { |
| 732 | // Compare for geq array.length |
| 733 | insert_position = predicate_add(upper_instr, upper, Instruction::geq, length_instr, state, insert_position, bci); |
| 734 | } else { |
| 735 | assert(upper > 0, "")do { if (!(upper > 0)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 735, "assert(" "upper > 0" ") failed", ""); ::breakpoint (); } } while (0); |
| 736 | upper = -upper; |
| 737 | // Compare for geq array.length |
| 738 | insert_position = predicate_add(length_instr, upper, Instruction::leq, upper_instr, state, insert_position, bci); |
| 739 | } |
| 740 | } |
| 741 | } |
| 742 | |
| 743 | // Add if condition |
| 744 | void RangeCheckEliminator::add_if_condition(IntegerStack &pushed, Value x, Value y, Instruction::Condition condition) { |
| 745 | if (y->as_Constant()) return; |
| 746 | |
| 747 | int const_value = 0; |
| 748 | Value instr_value = x; |
| 749 | Constant *c = x->as_Constant(); |
| 750 | ArithmeticOp *ao = x->as_ArithmeticOp(); |
| 751 | |
| 752 | if (c != NULL__null) { |
| 753 | const_value = c->type()->as_IntConstant()->value(); |
| 754 | instr_value = NULL__null; |
| 755 | } else if (ao != NULL__null && (!ao->x()->as_Constant() || !ao->y()->as_Constant()) && ((ao->op() == Bytecodes::_isub && ao->y()->as_Constant()) || ao->op() == Bytecodes::_iadd)) { |
| 756 | assert(!ao->x()->as_Constant() || !ao->y()->as_Constant(), "At least one operator must be non-constant!")do { if (!(!ao->x()->as_Constant() || !ao->y()->as_Constant ())) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 756, "assert(" "!ao->x()->as_Constant() || !ao->y()->as_Constant()" ") failed", "At least one operator must be non-constant!"); :: breakpoint(); } } while (0); |
| 757 | assert(ao->op() == Bytecodes::_isub || ao->op() == Bytecodes::_iadd, "Operation has to be add or sub!")do { if (!(ao->op() == Bytecodes::_isub || ao->op() == Bytecodes ::_iadd)) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 757, "assert(" "ao->op() == Bytecodes::_isub || ao->op() == Bytecodes::_iadd" ") failed", "Operation has to be add or sub!"); ::breakpoint (); } } while (0); |
| 758 | c = ao->x()->as_Constant(); |
| 759 | if (c != NULL__null) { |
| 760 | const_value = c->type()->as_IntConstant()->value(); |
| 761 | instr_value = ao->y(); |
| 762 | } else { |
| 763 | c = ao->y()->as_Constant(); |
| 764 | if (c != NULL__null) { |
| 765 | const_value = c->type()->as_IntConstant()->value(); |
| 766 | instr_value = ao->x(); |
| 767 | } |
| 768 | } |
| 769 | if (ao->op() == Bytecodes::_isub) { |
| 770 | assert(ao->y()->as_Constant(), "1 - x not supported, only x - 1 is valid!")do { if (!(ao->y()->as_Constant())) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 770, "assert(" "ao->y()->as_Constant()" ") failed", "1 - x not supported, only x - 1 is valid!" ); ::breakpoint(); } } while (0); |
| 771 | if (const_value > min_jint) { |
| 772 | const_value = -const_value; |
| 773 | } else { |
| 774 | const_value = 0; |
| 775 | instr_value = x; |
| 776 | } |
| 777 | } |
| 778 | } |
| 779 | |
| 780 | update_bound(pushed, y, condition, instr_value, const_value); |
| 781 | } |
| 782 | |
| 783 | // Process If |
| 784 | void RangeCheckEliminator::process_if(IntegerStack &pushed, BlockBegin *block, If *cond) { |
| 785 | // Only if we are direct true / false successor and NOT both ! (even this may occur) |
| 786 | if ((cond->tsux() == block || cond->fsux() == block) && cond->tsux() != cond->fsux()) { |
| 787 | Instruction::Condition condition = cond->cond(); |
| 788 | if (cond->fsux() == block) { |
| 789 | condition = Instruction::negate(condition); |
| 790 | } |
| 791 | Value x = cond->x(); |
| 792 | Value y = cond->y(); |
| 793 | if (x->type()->as_IntType() && y->type()->as_IntType()) { |
| 794 | add_if_condition(pushed, y, x, condition); |
| 795 | add_if_condition(pushed, x, y, Instruction::mirror(condition)); |
| 796 | } |
| 797 | } |
| 798 | } |
| 799 | |
| 800 | // Process access indexed |
| 801 | void RangeCheckEliminator::process_access_indexed(BlockBegin *loop_header, BlockBegin *block, AccessIndexed *ai) { |
| 802 | TRACE_RANGE_CHECK_ELIMINATION(if (TraceRangeCheckElimination) { tty->fill_to(block->dominator_depth ()*2); } |
| 803 | tty->fill_to(block->dominator_depth()*2)if (TraceRangeCheckElimination) { tty->fill_to(block->dominator_depth ()*2); } |
| 804 | )if (TraceRangeCheckElimination) { tty->fill_to(block->dominator_depth ()*2); }; |
| 805 | TRACE_RANGE_CHECK_ELIMINATION(if (TraceRangeCheckElimination) { tty->print_cr("Access indexed: index=%d length=%d" , ai->index()->id(), (ai->length() != __null ? ai-> length()->id() :-1 )); } |
| 806 | tty->print_cr("Access indexed: index=%d length=%d", ai->index()->id(), (ai->length() != NULL ? ai->length()->id() :-1 ))if (TraceRangeCheckElimination) { tty->print_cr("Access indexed: index=%d length=%d" , ai->index()->id(), (ai->length() != __null ? ai-> length()->id() :-1 )); } |
| 807 | )if (TraceRangeCheckElimination) { tty->print_cr("Access indexed: index=%d length=%d" , ai->index()->id(), (ai->length() != __null ? ai-> length()->id() :-1 )); }; |
| 808 | |
| 809 | if (ai->check_flag(Instruction::NeedsRangeCheckFlag)) { |
| 810 | Bound *index_bound = get_bound(ai->index()); |
| 811 | if (!index_bound->has_lower() || !index_bound->has_upper()) { |
| 812 | TRACE_RANGE_CHECK_ELIMINATION(if (TraceRangeCheckElimination) { tty->fill_to(block->dominator_depth ()*2); tty->print_cr("Index instruction %d has no lower and/or no upper bound!" , ai->index()->id()); } |
| 813 | tty->fill_to(block->dominator_depth()*2);if (TraceRangeCheckElimination) { tty->fill_to(block->dominator_depth ()*2); tty->print_cr("Index instruction %d has no lower and/or no upper bound!" , ai->index()->id()); } |
| 814 | tty->print_cr("Index instruction %d has no lower and/or no upper bound!", ai->index()->id())if (TraceRangeCheckElimination) { tty->fill_to(block->dominator_depth ()*2); tty->print_cr("Index instruction %d has no lower and/or no upper bound!" , ai->index()->id()); } |
| 815 | )if (TraceRangeCheckElimination) { tty->fill_to(block->dominator_depth ()*2); tty->print_cr("Index instruction %d has no lower and/or no upper bound!" , ai->index()->id()); }; |
| 816 | return; |
| 817 | } |
| 818 | |
| 819 | Bound *array_bound; |
| 820 | if (ai->length()) { |
| 821 | array_bound = get_bound(ai->length()); |
| 822 | } else { |
| 823 | array_bound = get_bound(ai->array()); |
| 824 | } |
| 825 | |
| 826 | TRACE_RANGE_CHECK_ELIMINATION(if (TraceRangeCheckElimination) { tty->fill_to(block->dominator_depth ()*2); tty->print("Index bound: "); index_bound->print( ); tty->print(", Array bound: "); array_bound->print(); tty->cr();; } |
| 827 | tty->fill_to(block->dominator_depth()*2);if (TraceRangeCheckElimination) { tty->fill_to(block->dominator_depth ()*2); tty->print("Index bound: "); index_bound->print( ); tty->print(", Array bound: "); array_bound->print(); tty->cr();; } |
| 828 | tty->print("Index bound: ");if (TraceRangeCheckElimination) { tty->fill_to(block->dominator_depth ()*2); tty->print("Index bound: "); index_bound->print( ); tty->print(", Array bound: "); array_bound->print(); tty->cr();; } |
| 829 | index_bound->print();if (TraceRangeCheckElimination) { tty->fill_to(block->dominator_depth ()*2); tty->print("Index bound: "); index_bound->print( ); tty->print(", Array bound: "); array_bound->print(); tty->cr();; } |
| 830 | tty->print(", Array bound: ");if (TraceRangeCheckElimination) { tty->fill_to(block->dominator_depth ()*2); tty->print("Index bound: "); index_bound->print( ); tty->print(", Array bound: "); array_bound->print(); tty->cr();; } |
| 831 | array_bound->print();if (TraceRangeCheckElimination) { tty->fill_to(block->dominator_depth ()*2); tty->print("Index bound: "); index_bound->print( ); tty->print(", Array bound: "); array_bound->print(); tty->cr();; } |
| 832 | tty->cr();if (TraceRangeCheckElimination) { tty->fill_to(block->dominator_depth ()*2); tty->print("Index bound: "); index_bound->print( ); tty->print(", Array bound: "); array_bound->print(); tty->cr();; } |
| 833 | )if (TraceRangeCheckElimination) { tty->fill_to(block->dominator_depth ()*2); tty->print("Index bound: "); index_bound->print( ); tty->print(", Array bound: "); array_bound->print(); tty->cr();; }; |
| 834 | |
| 835 | if (in_array_bound(index_bound, ai->array()) || |
| 836 | (index_bound && array_bound && index_bound->is_smaller(array_bound) && !index_bound->lower_instr() && index_bound->lower() >= 0)) { |
| 837 | TRACE_RANGE_CHECK_ELIMINATION(if (TraceRangeCheckElimination) { tty->fill_to(block->dominator_depth ()*2); tty->print_cr("Bounds check for instruction %d in block B%d can be fully eliminated!" , ai->id(), ai->block()->block_id()); } |
| 838 | tty->fill_to(block->dominator_depth()*2);if (TraceRangeCheckElimination) { tty->fill_to(block->dominator_depth ()*2); tty->print_cr("Bounds check for instruction %d in block B%d can be fully eliminated!" , ai->id(), ai->block()->block_id()); } |
| 839 | tty->print_cr("Bounds check for instruction %d in block B%d can be fully eliminated!", ai->id(), ai->block()->block_id())if (TraceRangeCheckElimination) { tty->fill_to(block->dominator_depth ()*2); tty->print_cr("Bounds check for instruction %d in block B%d can be fully eliminated!" , ai->id(), ai->block()->block_id()); } |
| 840 | )if (TraceRangeCheckElimination) { tty->fill_to(block->dominator_depth ()*2); tty->print_cr("Bounds check for instruction %d in block B%d can be fully eliminated!" , ai->id(), ai->block()->block_id()); }; |
| 841 | |
| 842 | remove_range_check(ai); |
| 843 | } else if (_optimistic && loop_header) { |
| 844 | assert(ai->array(), "Array must not be null!")do { if (!(ai->array())) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 844, "assert(" "ai->array()" ") failed", "Array must not be null!" ); ::breakpoint(); } } while (0); |
| 845 | assert(ai->index(), "Index must not be null!")do { if (!(ai->index())) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 845, "assert(" "ai->index()" ") failed", "Index must not be null!" ); ::breakpoint(); } } while (0); |
| 846 | |
| 847 | // Array instruction |
| 848 | Instruction *array_instr = ai->array(); |
| 849 | if (!loop_invariant(loop_header, array_instr)) { |
| 850 | TRACE_RANGE_CHECK_ELIMINATION(if (TraceRangeCheckElimination) { tty->fill_to(block->dominator_depth ()*2); tty->print_cr("Array %d is not loop invariant to header B%d" , ai->array()->id(), loop_header->block_id()); } |
| 851 | tty->fill_to(block->dominator_depth()*2);if (TraceRangeCheckElimination) { tty->fill_to(block->dominator_depth ()*2); tty->print_cr("Array %d is not loop invariant to header B%d" , ai->array()->id(), loop_header->block_id()); } |
| 852 | tty->print_cr("Array %d is not loop invariant to header B%d", ai->array()->id(), loop_header->block_id())if (TraceRangeCheckElimination) { tty->fill_to(block->dominator_depth ()*2); tty->print_cr("Array %d is not loop invariant to header B%d" , ai->array()->id(), loop_header->block_id()); } |
| 853 | )if (TraceRangeCheckElimination) { tty->fill_to(block->dominator_depth ()*2); tty->print_cr("Array %d is not loop invariant to header B%d" , ai->array()->id(), loop_header->block_id()); }; |
| 854 | return; |
| 855 | } |
| 856 | |
| 857 | // Lower instruction |
| 858 | Value index_instr = ai->index(); |
| 859 | Value lower_instr = index_bound->lower_instr(); |
| 860 | if (!loop_invariant(loop_header, lower_instr)) { |
| 861 | TRACE_RANGE_CHECK_ELIMINATION(if (TraceRangeCheckElimination) { tty->fill_to(block->dominator_depth ()*2); tty->print_cr("Lower instruction %d not loop invariant!" , lower_instr->id()); } |
| 862 | tty->fill_to(block->dominator_depth()*2);if (TraceRangeCheckElimination) { tty->fill_to(block->dominator_depth ()*2); tty->print_cr("Lower instruction %d not loop invariant!" , lower_instr->id()); } |
| 863 | tty->print_cr("Lower instruction %d not loop invariant!", lower_instr->id())if (TraceRangeCheckElimination) { tty->fill_to(block->dominator_depth ()*2); tty->print_cr("Lower instruction %d not loop invariant!" , lower_instr->id()); } |
| 864 | )if (TraceRangeCheckElimination) { tty->fill_to(block->dominator_depth ()*2); tty->print_cr("Lower instruction %d not loop invariant!" , lower_instr->id()); }; |
| 865 | return; |
| 866 | } |
| 867 | if (!lower_instr && index_bound->lower() < 0) { |
| 868 | TRACE_RANGE_CHECK_ELIMINATION(if (TraceRangeCheckElimination) { tty->fill_to(block->dominator_depth ()*2); tty->print_cr("Lower bound smaller than 0 (%d)!", index_bound ->lower()); } |
| 869 | tty->fill_to(block->dominator_depth()*2);if (TraceRangeCheckElimination) { tty->fill_to(block->dominator_depth ()*2); tty->print_cr("Lower bound smaller than 0 (%d)!", index_bound ->lower()); } |
| 870 | tty->print_cr("Lower bound smaller than 0 (%d)!", index_bound->lower())if (TraceRangeCheckElimination) { tty->fill_to(block->dominator_depth ()*2); tty->print_cr("Lower bound smaller than 0 (%d)!", index_bound ->lower()); } |
| 871 | )if (TraceRangeCheckElimination) { tty->fill_to(block->dominator_depth ()*2); tty->print_cr("Lower bound smaller than 0 (%d)!", index_bound ->lower()); }; |
| 872 | return; |
| 873 | } |
| 874 | |
| 875 | // Upper instruction |
| 876 | Value upper_instr = index_bound->upper_instr(); |
| 877 | if (!loop_invariant(loop_header, upper_instr)) { |
| 878 | TRACE_RANGE_CHECK_ELIMINATION(if (TraceRangeCheckElimination) { tty->fill_to(block->dominator_depth ()*2); tty->print_cr("Upper instruction %d not loop invariant!" , upper_instr->id()); } |
| 879 | tty->fill_to(block->dominator_depth()*2);if (TraceRangeCheckElimination) { tty->fill_to(block->dominator_depth ()*2); tty->print_cr("Upper instruction %d not loop invariant!" , upper_instr->id()); } |
| 880 | tty->print_cr("Upper instruction %d not loop invariant!", upper_instr->id())if (TraceRangeCheckElimination) { tty->fill_to(block->dominator_depth ()*2); tty->print_cr("Upper instruction %d not loop invariant!" , upper_instr->id()); } |
| 881 | )if (TraceRangeCheckElimination) { tty->fill_to(block->dominator_depth ()*2); tty->print_cr("Upper instruction %d not loop invariant!" , upper_instr->id()); }; |
| 882 | return; |
| 883 | } |
| 884 | |
| 885 | // Length instruction |
| 886 | Value length_instr = ai->length(); |
| 887 | if (!loop_invariant(loop_header, length_instr)) { |
| 888 | // Generate length instruction yourself! |
| 889 | length_instr = NULL__null; |
| 890 | } |
| 891 | |
| 892 | TRACE_RANGE_CHECK_ELIMINATION(if (TraceRangeCheckElimination) { tty->fill_to(block->dominator_depth ()*2); tty->print_cr("LOOP INVARIANT access indexed %d found in block B%d!" , ai->id(), ai->block()->block_id()); } |
| 893 | tty->fill_to(block->dominator_depth()*2);if (TraceRangeCheckElimination) { tty->fill_to(block->dominator_depth ()*2); tty->print_cr("LOOP INVARIANT access indexed %d found in block B%d!" , ai->id(), ai->block()->block_id()); } |
| 894 | tty->print_cr("LOOP INVARIANT access indexed %d found in block B%d!", ai->id(), ai->block()->block_id())if (TraceRangeCheckElimination) { tty->fill_to(block->dominator_depth ()*2); tty->print_cr("LOOP INVARIANT access indexed %d found in block B%d!" , ai->id(), ai->block()->block_id()); } |
| 895 | )if (TraceRangeCheckElimination) { tty->fill_to(block->dominator_depth ()*2); tty->print_cr("LOOP INVARIANT access indexed %d found in block B%d!" , ai->id(), ai->block()->block_id()); }; |
| 896 | |
| 897 | BlockBegin *pred_block = loop_header->dominator(); |
| 898 | assert(pred_block != NULL, "Every loop header has a dominator!")do { if (!(pred_block != __null)) { (*g_assert_poison) = 'X'; ; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 898, "assert(" "pred_block != __null" ") failed", "Every loop header has a dominator!" ); ::breakpoint(); } } while (0); |
| 899 | BlockEnd *pred_block_end = pred_block->end(); |
| 900 | Instruction *insert_position = pred_block_end->prev(); |
| 901 | ValueStack *state = pred_block_end->state_before(); |
| 902 | if (pred_block_end->as_Goto() && state == NULL__null) state = pred_block_end->state(); |
| 903 | assert(state, "State must not be null")do { if (!(state)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 903, "assert(" "state" ") failed", "State must not be null" ); ::breakpoint(); } } while (0); |
| 904 | |
| 905 | // Add deoptimization to dominator of loop header |
| 906 | TRACE_RANGE_CHECK_ELIMINATION(if (TraceRangeCheckElimination) { tty->fill_to(block->dominator_depth ()*2); tty->print_cr("Inserting deopt at bci %d in block B%d!" , state->bci(), insert_position->block()->block_id() ); } |
| 907 | tty->fill_to(block->dominator_depth()*2);if (TraceRangeCheckElimination) { tty->fill_to(block->dominator_depth ()*2); tty->print_cr("Inserting deopt at bci %d in block B%d!" , state->bci(), insert_position->block()->block_id() ); } |
| 908 | tty->print_cr("Inserting deopt at bci %d in block B%d!", state->bci(), insert_position->block()->block_id())if (TraceRangeCheckElimination) { tty->fill_to(block->dominator_depth ()*2); tty->print_cr("Inserting deopt at bci %d in block B%d!" , state->bci(), insert_position->block()->block_id() ); } |
| 909 | )if (TraceRangeCheckElimination) { tty->fill_to(block->dominator_depth ()*2); tty->print_cr("Inserting deopt at bci %d in block B%d!" , state->bci(), insert_position->block()->block_id() ); }; |
| 910 | |
| 911 | if (!is_ok_for_deoptimization(insert_position, array_instr, length_instr, lower_instr, index_bound->lower(), upper_instr, index_bound->upper())) { |
| 912 | TRACE_RANGE_CHECK_ELIMINATION(if (TraceRangeCheckElimination) { tty->fill_to(block->dominator_depth ()*2); tty->print_cr("Could not eliminate because of static analysis!" ); } |
| 913 | tty->fill_to(block->dominator_depth()*2);if (TraceRangeCheckElimination) { tty->fill_to(block->dominator_depth ()*2); tty->print_cr("Could not eliminate because of static analysis!" ); } |
| 914 | tty->print_cr("Could not eliminate because of static analysis!")if (TraceRangeCheckElimination) { tty->fill_to(block->dominator_depth ()*2); tty->print_cr("Could not eliminate because of static analysis!" ); } |
| 915 | )if (TraceRangeCheckElimination) { tty->fill_to(block->dominator_depth ()*2); tty->print_cr("Could not eliminate because of static analysis!" ); }; |
| 916 | return; |
| 917 | } |
| 918 | |
| 919 | insert_deoptimization(state, insert_position, array_instr, length_instr, lower_instr, index_bound->lower(), upper_instr, index_bound->upper(), ai); |
| 920 | |
| 921 | // Finally remove the range check! |
| 922 | remove_range_check(ai); |
| 923 | } |
| 924 | } |
| 925 | } |
| 926 | |
| 927 | void RangeCheckEliminator::remove_range_check(AccessIndexed *ai) { |
| 928 | ai->set_flag(Instruction::NeedsRangeCheckFlag, false); |
| 929 | // no range check, no need for the length instruction anymore |
| 930 | ai->clear_length(); |
| 931 | |
| 932 | TRACE_RANGE_CHECK_ELIMINATION(if (TraceRangeCheckElimination) { tty->fill_to(ai->dominator_depth ()*2); tty->print_cr("Range check for instruction %d eliminated!" , ai->id());; } |
| 933 | tty->fill_to(ai->dominator_depth()*2);if (TraceRangeCheckElimination) { tty->fill_to(ai->dominator_depth ()*2); tty->print_cr("Range check for instruction %d eliminated!" , ai->id());; } |
| 934 | tty->print_cr("Range check for instruction %d eliminated!", ai->id());if (TraceRangeCheckElimination) { tty->fill_to(ai->dominator_depth ()*2); tty->print_cr("Range check for instruction %d eliminated!" , ai->id());; } |
| 935 | )if (TraceRangeCheckElimination) { tty->fill_to(ai->dominator_depth ()*2); tty->print_cr("Range check for instruction %d eliminated!" , ai->id());; }; |
| 936 | |
| 937 | ASSERT_RANGE_CHECK_ELIMINATION(if (AssertRangeCheckElimination) { Value array_length = ai-> length(); if (!array_length) { array_length = ai->array(); do { if (!(array_length->type()->as_ObjectType())) { ( *g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 941, "assert(" "array_length->type()->as_ObjectType()" ") failed", "Has to be object type!"); ::breakpoint(); } } while (0); } int cur_constant = -1; Value cur_value = array_length ; if (cur_value->type()->as_IntConstant()) { cur_constant += cur_value->type()->as_IntConstant()->value(); cur_value = __null; } Bound *new_index_bound = new Bound(0, __null, cur_constant , cur_value); add_assertions(new_index_bound, ai->index(), ai);; } |
| 938 | Value array_length = ai->length();if (AssertRangeCheckElimination) { Value array_length = ai-> length(); if (!array_length) { array_length = ai->array(); do { if (!(array_length->type()->as_ObjectType())) { ( *g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 941, "assert(" "array_length->type()->as_ObjectType()" ") failed", "Has to be object type!"); ::breakpoint(); } } while (0); } int cur_constant = -1; Value cur_value = array_length ; if (cur_value->type()->as_IntConstant()) { cur_constant += cur_value->type()->as_IntConstant()->value(); cur_value = __null; } Bound *new_index_bound = new Bound(0, __null, cur_constant , cur_value); add_assertions(new_index_bound, ai->index(), ai);; } |
| 939 | if (!array_length) {if (AssertRangeCheckElimination) { Value array_length = ai-> length(); if (!array_length) { array_length = ai->array(); do { if (!(array_length->type()->as_ObjectType())) { ( *g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 941, "assert(" "array_length->type()->as_ObjectType()" ") failed", "Has to be object type!"); ::breakpoint(); } } while (0); } int cur_constant = -1; Value cur_value = array_length ; if (cur_value->type()->as_IntConstant()) { cur_constant += cur_value->type()->as_IntConstant()->value(); cur_value = __null; } Bound *new_index_bound = new Bound(0, __null, cur_constant , cur_value); add_assertions(new_index_bound, ai->index(), ai);; } |
| 940 | array_length = ai->array();if (AssertRangeCheckElimination) { Value array_length = ai-> length(); if (!array_length) { array_length = ai->array(); do { if (!(array_length->type()->as_ObjectType())) { ( *g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 941, "assert(" "array_length->type()->as_ObjectType()" ") failed", "Has to be object type!"); ::breakpoint(); } } while (0); } int cur_constant = -1; Value cur_value = array_length ; if (cur_value->type()->as_IntConstant()) { cur_constant += cur_value->type()->as_IntConstant()->value(); cur_value = __null; } Bound *new_index_bound = new Bound(0, __null, cur_constant , cur_value); add_assertions(new_index_bound, ai->index(), ai);; } |
| 941 | assert(array_length->type()->as_ObjectType(), "Has to be object type!");if (AssertRangeCheckElimination) { Value array_length = ai-> length(); if (!array_length) { array_length = ai->array(); do { if (!(array_length->type()->as_ObjectType())) { ( *g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 941, "assert(" "array_length->type()->as_ObjectType()" ") failed", "Has to be object type!"); ::breakpoint(); } } while (0); } int cur_constant = -1; Value cur_value = array_length ; if (cur_value->type()->as_IntConstant()) { cur_constant += cur_value->type()->as_IntConstant()->value(); cur_value = __null; } Bound *new_index_bound = new Bound(0, __null, cur_constant , cur_value); add_assertions(new_index_bound, ai->index(), ai);; } |
| 942 | }if (AssertRangeCheckElimination) { Value array_length = ai-> length(); if (!array_length) { array_length = ai->array(); do { if (!(array_length->type()->as_ObjectType())) { ( *g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 941, "assert(" "array_length->type()->as_ObjectType()" ") failed", "Has to be object type!"); ::breakpoint(); } } while (0); } int cur_constant = -1; Value cur_value = array_length ; if (cur_value->type()->as_IntConstant()) { cur_constant += cur_value->type()->as_IntConstant()->value(); cur_value = __null; } Bound *new_index_bound = new Bound(0, __null, cur_constant , cur_value); add_assertions(new_index_bound, ai->index(), ai);; } |
| 943 | int cur_constant = -1;if (AssertRangeCheckElimination) { Value array_length = ai-> length(); if (!array_length) { array_length = ai->array(); do { if (!(array_length->type()->as_ObjectType())) { ( *g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 941, "assert(" "array_length->type()->as_ObjectType()" ") failed", "Has to be object type!"); ::breakpoint(); } } while (0); } int cur_constant = -1; Value cur_value = array_length ; if (cur_value->type()->as_IntConstant()) { cur_constant += cur_value->type()->as_IntConstant()->value(); cur_value = __null; } Bound *new_index_bound = new Bound(0, __null, cur_constant , cur_value); add_assertions(new_index_bound, ai->index(), ai);; } |
| 944 | Value cur_value = array_length;if (AssertRangeCheckElimination) { Value array_length = ai-> length(); if (!array_length) { array_length = ai->array(); do { if (!(array_length->type()->as_ObjectType())) { ( *g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 941, "assert(" "array_length->type()->as_ObjectType()" ") failed", "Has to be object type!"); ::breakpoint(); } } while (0); } int cur_constant = -1; Value cur_value = array_length ; if (cur_value->type()->as_IntConstant()) { cur_constant += cur_value->type()->as_IntConstant()->value(); cur_value = __null; } Bound *new_index_bound = new Bound(0, __null, cur_constant , cur_value); add_assertions(new_index_bound, ai->index(), ai);; } |
| 945 | if (cur_value->type()->as_IntConstant()) {if (AssertRangeCheckElimination) { Value array_length = ai-> length(); if (!array_length) { array_length = ai->array(); do { if (!(array_length->type()->as_ObjectType())) { ( *g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 941, "assert(" "array_length->type()->as_ObjectType()" ") failed", "Has to be object type!"); ::breakpoint(); } } while (0); } int cur_constant = -1; Value cur_value = array_length ; if (cur_value->type()->as_IntConstant()) { cur_constant += cur_value->type()->as_IntConstant()->value(); cur_value = __null; } Bound *new_index_bound = new Bound(0, __null, cur_constant , cur_value); add_assertions(new_index_bound, ai->index(), ai);; } |
| 946 | cur_constant += cur_value->type()->as_IntConstant()->value();if (AssertRangeCheckElimination) { Value array_length = ai-> length(); if (!array_length) { array_length = ai->array(); do { if (!(array_length->type()->as_ObjectType())) { ( *g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 941, "assert(" "array_length->type()->as_ObjectType()" ") failed", "Has to be object type!"); ::breakpoint(); } } while (0); } int cur_constant = -1; Value cur_value = array_length ; if (cur_value->type()->as_IntConstant()) { cur_constant += cur_value->type()->as_IntConstant()->value(); cur_value = __null; } Bound *new_index_bound = new Bound(0, __null, cur_constant , cur_value); add_assertions(new_index_bound, ai->index(), ai);; } |
| 947 | cur_value = NULL;if (AssertRangeCheckElimination) { Value array_length = ai-> length(); if (!array_length) { array_length = ai->array(); do { if (!(array_length->type()->as_ObjectType())) { ( *g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 941, "assert(" "array_length->type()->as_ObjectType()" ") failed", "Has to be object type!"); ::breakpoint(); } } while (0); } int cur_constant = -1; Value cur_value = array_length ; if (cur_value->type()->as_IntConstant()) { cur_constant += cur_value->type()->as_IntConstant()->value(); cur_value = __null; } Bound *new_index_bound = new Bound(0, __null, cur_constant , cur_value); add_assertions(new_index_bound, ai->index(), ai);; } |
| 948 | }if (AssertRangeCheckElimination) { Value array_length = ai-> length(); if (!array_length) { array_length = ai->array(); do { if (!(array_length->type()->as_ObjectType())) { ( *g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 941, "assert(" "array_length->type()->as_ObjectType()" ") failed", "Has to be object type!"); ::breakpoint(); } } while (0); } int cur_constant = -1; Value cur_value = array_length ; if (cur_value->type()->as_IntConstant()) { cur_constant += cur_value->type()->as_IntConstant()->value(); cur_value = __null; } Bound *new_index_bound = new Bound(0, __null, cur_constant , cur_value); add_assertions(new_index_bound, ai->index(), ai);; } |
| 949 | Bound *new_index_bound = new Bound(0, NULL, cur_constant, cur_value);if (AssertRangeCheckElimination) { Value array_length = ai-> length(); if (!array_length) { array_length = ai->array(); do { if (!(array_length->type()->as_ObjectType())) { ( *g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 941, "assert(" "array_length->type()->as_ObjectType()" ") failed", "Has to be object type!"); ::breakpoint(); } } while (0); } int cur_constant = -1; Value cur_value = array_length ; if (cur_value->type()->as_IntConstant()) { cur_constant += cur_value->type()->as_IntConstant()->value(); cur_value = __null; } Bound *new_index_bound = new Bound(0, __null, cur_constant , cur_value); add_assertions(new_index_bound, ai->index(), ai);; } |
| 950 | add_assertions(new_index_bound, ai->index(), ai);if (AssertRangeCheckElimination) { Value array_length = ai-> length(); if (!array_length) { array_length = ai->array(); do { if (!(array_length->type()->as_ObjectType())) { ( *g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 941, "assert(" "array_length->type()->as_ObjectType()" ") failed", "Has to be object type!"); ::breakpoint(); } } while (0); } int cur_constant = -1; Value cur_value = array_length ; if (cur_value->type()->as_IntConstant()) { cur_constant += cur_value->type()->as_IntConstant()->value(); cur_value = __null; } Bound *new_index_bound = new Bound(0, __null, cur_constant , cur_value); add_assertions(new_index_bound, ai->index(), ai);; } |
| 951 | )if (AssertRangeCheckElimination) { Value array_length = ai-> length(); if (!array_length) { array_length = ai->array(); do { if (!(array_length->type()->as_ObjectType())) { ( *g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 941, "assert(" "array_length->type()->as_ObjectType()" ") failed", "Has to be object type!"); ::breakpoint(); } } while (0); } int cur_constant = -1; Value cur_value = array_length ; if (cur_value->type()->as_IntConstant()) { cur_constant += cur_value->type()->as_IntConstant()->value(); cur_value = __null; } Bound *new_index_bound = new Bound(0, __null, cur_constant , cur_value); add_assertions(new_index_bound, ai->index(), ai);; }; |
| 952 | } |
| 953 | |
| 954 | // Calculate bounds for instruction in this block and children blocks in the dominator tree |
| 955 | void RangeCheckEliminator::calc_bounds(BlockBegin *block, BlockBegin *loop_header) { |
| 956 | // Ensures a valid loop_header |
| 957 | assert(!loop_header || loop_header->is_set(BlockBegin::linear_scan_loop_header_flag), "Loop header has to be real !")do { if (!(!loop_header || loop_header->is_set(BlockBegin:: linear_scan_loop_header_flag))) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 957, "assert(" "!loop_header || loop_header->is_set(BlockBegin::linear_scan_loop_header_flag)" ") failed", "Loop header has to be real !"); ::breakpoint(); } } while (0); |
| 958 | |
| 959 | // Tracing output |
| 960 | TRACE_RANGE_CHECK_ELIMINATION(if (TraceRangeCheckElimination) { tty->fill_to(block->dominator_depth ()*2); tty->print_cr("Block B%d", block->block_id());; } |
| 961 | tty->fill_to(block->dominator_depth()*2);if (TraceRangeCheckElimination) { tty->fill_to(block->dominator_depth ()*2); tty->print_cr("Block B%d", block->block_id());; } |
| 962 | tty->print_cr("Block B%d", block->block_id());if (TraceRangeCheckElimination) { tty->fill_to(block->dominator_depth ()*2); tty->print_cr("Block B%d", block->block_id());; } |
| 963 | )if (TraceRangeCheckElimination) { tty->fill_to(block->dominator_depth ()*2); tty->print_cr("Block B%d", block->block_id());; }; |
| 964 | |
| 965 | // Pushed stack for conditions |
| 966 | IntegerStack pushed; |
| 967 | // Process If |
| 968 | BlockBegin *parent = block->dominator(); |
| 969 | if (parent != NULL__null) { |
| 970 | If *cond = parent->end()->as_If(); |
| 971 | if (cond != NULL__null) { |
| 972 | process_if(pushed, block, cond); |
| 973 | } |
| 974 | } |
| 975 | |
| 976 | // Interate over current block |
| 977 | InstructionList arrays; |
| 978 | AccessIndexedList accessIndexed; |
| 979 | Instruction *cur = block; |
| 980 | |
| 981 | while (cur) { |
| 982 | // Ensure cur wasn't inserted during the elimination |
| 983 | if (cur->id() < this->_bounds.length()) { |
| 984 | // Process only if it is an access indexed instruction |
| 985 | AccessIndexed *ai = cur->as_AccessIndexed(); |
| 986 | if (ai != NULL__null) { |
| 987 | process_access_indexed(loop_header, block, ai); |
| 988 | accessIndexed.append(ai); |
| 989 | if (!arrays.contains(ai->array())) { |
| 990 | arrays.append(ai->array()); |
| 991 | } |
| 992 | Bound *b = get_bound(ai->index()); |
| 993 | if (!b->lower_instr()) { |
| 994 | // Lower bound is constant |
| 995 | update_bound(pushed, ai->index(), Instruction::geq, NULL__null, 0); |
| 996 | } |
| 997 | if (!b->has_upper()) { |
| 998 | if (ai->length() && ai->length()->type()->as_IntConstant()) { |
| 999 | int value = ai->length()->type()->as_IntConstant()->value(); |
| 1000 | update_bound(pushed, ai->index(), Instruction::lss, NULL__null, value); |
| 1001 | } else { |
| 1002 | // Has no upper bound |
| 1003 | Instruction *instr = ai->length(); |
| 1004 | if (instr == NULL__null) instr = ai->array(); |
| 1005 | update_bound(pushed, ai->index(), Instruction::lss, instr, 0); |
| 1006 | } |
| 1007 | } |
| 1008 | } |
| 1009 | } |
| 1010 | cur = cur->next(); |
| 1011 | } |
| 1012 | |
| 1013 | // Output current condition stack |
| 1014 | TRACE_RANGE_CHECK_ELIMINATION(dump_condition_stack(block))if (TraceRangeCheckElimination) { dump_condition_stack(block) ; }; |
| 1015 | |
| 1016 | // Do in block motion of range checks |
| 1017 | in_block_motion(block, accessIndexed, arrays); |
| 1018 | |
| 1019 | // Call all dominated blocks |
| 1020 | for (int i=0; i<block->dominates()->length(); i++) { |
| 1021 | BlockBegin *next = block->dominates()->at(i); |
| 1022 | if (!next->is_set(BlockBegin::donot_eliminate_range_checks)) { |
| 1023 | // if current block is a loop header and: |
| 1024 | // - next block belongs to the same loop |
| 1025 | // or |
| 1026 | // - next block belongs to an inner loop |
| 1027 | // then current block is the loop header for next block |
| 1028 | if (block->is_set(BlockBegin::linear_scan_loop_header_flag) && (block->loop_index() == next->loop_index() || next->loop_depth() > block->loop_depth())) { |
| 1029 | calc_bounds(next, block); |
| 1030 | } else { |
| 1031 | calc_bounds(next, loop_header); |
| 1032 | } |
| 1033 | } |
| 1034 | } |
| 1035 | |
| 1036 | // Reset stack |
| 1037 | for (int i=0; i<pushed.length(); i++) { |
| 1038 | _bounds.at(pushed.at(i))->pop(); |
| 1039 | } |
| 1040 | } |
| 1041 | |
| 1042 | #ifndef PRODUCT |
| 1043 | // Dump condition stack |
| 1044 | void RangeCheckEliminator::dump_condition_stack(BlockBegin *block) { |
| 1045 | for (int i=0; i<_ir->linear_scan_order()->length(); i++) { |
| 1046 | BlockBegin *cur_block = _ir->linear_scan_order()->at(i); |
| 1047 | Instruction *instr = cur_block; |
| 1048 | for_each_phi_fun(cur_block, phi,{ int cur_index; ValueStack* cur_state = cur_block->state( ); Value value; { int temp__1060 = cur_state->stack_size() ; for (cur_index = 0; cur_index < temp__1060 && (value = cur_state->stack_at(cur_index), true); cur_index += value ->type()->size()) { Phi* phi = value->as_Phi(); if ( phi != __null && phi->block() == cur_block) { BoundStack *bound_stack = _bounds.at(phi->id()); if (bound_stack && bound_stack->length() > 0) { Bound *bound = bound_stack ->top(); if ((bound->has_lower() || bound->has_upper ()) && (bound->lower_instr() != phi || bound->upper_instr () != phi || bound->lower() != 0 || bound->upper() != 0 )) { if (TraceRangeCheckElimination) { tty->fill_to(2*block ->dominator_depth()); tty->print("i%d", phi->id()); tty ->print(": "); bound->print(); tty->cr();; }; } }; } } } { int temp__1060 = cur_state->locals_size(); for (cur_index = 0; cur_index < temp__1060 && (value = cur_state ->local_at(cur_index), true); cur_index += (value == __null || value->type()->is_illegal() ? 1 : value->type()-> size())) if (value != __null) { Phi* phi = value->as_Phi() ; if (phi != __null && phi->block() == cur_block) { BoundStack *bound_stack = _bounds.at(phi->id()); if (bound_stack && bound_stack->length() > 0) { Bound *bound = bound_stack->top(); if ((bound->has_lower() || bound-> has_upper()) && (bound->lower_instr() != phi || bound ->upper_instr() != phi || bound->lower() != 0 || bound-> upper() != 0)) { if (TraceRangeCheckElimination) { tty->fill_to (2*block->dominator_depth()); tty->print("i%d", phi-> id()); tty->print(": "); bound->print(); tty->cr();; }; } }; } } } } |
| 1049 | BoundStack *bound_stack = _bounds.at(phi->id());{ int cur_index; ValueStack* cur_state = cur_block->state( ); Value value; { int temp__1060 = cur_state->stack_size() ; for (cur_index = 0; cur_index < temp__1060 && (value = cur_state->stack_at(cur_index), true); cur_index += value ->type()->size()) { Phi* phi = value->as_Phi(); if ( phi != __null && phi->block() == cur_block) { BoundStack *bound_stack = _bounds.at(phi->id()); if (bound_stack && bound_stack->length() > 0) { Bound *bound = bound_stack ->top(); if ((bound->has_lower() || bound->has_upper ()) && (bound->lower_instr() != phi || bound->upper_instr () != phi || bound->lower() != 0 || bound->upper() != 0 )) { if (TraceRangeCheckElimination) { tty->fill_to(2*block ->dominator_depth()); tty->print("i%d", phi->id()); tty ->print(": "); bound->print(); tty->cr();; }; } }; } } } { int temp__1060 = cur_state->locals_size(); for (cur_index = 0; cur_index < temp__1060 && (value = cur_state ->local_at(cur_index), true); cur_index += (value == __null || value->type()->is_illegal() ? 1 : value->type()-> size())) if (value != __null) { Phi* phi = value->as_Phi() ; if (phi != __null && phi->block() == cur_block) { BoundStack *bound_stack = _bounds.at(phi->id()); if (bound_stack && bound_stack->length() > 0) { Bound *bound = bound_stack->top(); if ((bound->has_lower() || bound-> has_upper()) && (bound->lower_instr() != phi || bound ->upper_instr() != phi || bound->lower() != 0 || bound-> upper() != 0)) { if (TraceRangeCheckElimination) { tty->fill_to (2*block->dominator_depth()); tty->print("i%d", phi-> id()); tty->print(": "); bound->print(); tty->cr();; }; } }; } } } } |
| 1050 | if (bound_stack && bound_stack->length() > 0) {{ int cur_index; ValueStack* cur_state = cur_block->state( ); Value value; { int temp__1060 = cur_state->stack_size() ; for (cur_index = 0; cur_index < temp__1060 && (value = cur_state->stack_at(cur_index), true); cur_index += value ->type()->size()) { Phi* phi = value->as_Phi(); if ( phi != __null && phi->block() == cur_block) { BoundStack *bound_stack = _bounds.at(phi->id()); if (bound_stack && bound_stack->length() > 0) { Bound *bound = bound_stack ->top(); if ((bound->has_lower() || bound->has_upper ()) && (bound->lower_instr() != phi || bound->upper_instr () != phi || bound->lower() != 0 || bound->upper() != 0 )) { if (TraceRangeCheckElimination) { tty->fill_to(2*block ->dominator_depth()); tty->print("i%d", phi->id()); tty ->print(": "); bound->print(); tty->cr();; }; } }; } } } { int temp__1060 = cur_state->locals_size(); for (cur_index = 0; cur_index < temp__1060 && (value = cur_state ->local_at(cur_index), true); cur_index += (value == __null || value->type()->is_illegal() ? 1 : value->type()-> size())) if (value != __null) { Phi* phi = value->as_Phi() ; if (phi != __null && phi->block() == cur_block) { BoundStack *bound_stack = _bounds.at(phi->id()); if (bound_stack && bound_stack->length() > 0) { Bound *bound = bound_stack->top(); if ((bound->has_lower() || bound-> has_upper()) && (bound->lower_instr() != phi || bound ->upper_instr() != phi || bound->lower() != 0 || bound-> upper() != 0)) { if (TraceRangeCheckElimination) { tty->fill_to (2*block->dominator_depth()); tty->print("i%d", phi-> id()); tty->print(": "); bound->print(); tty->cr();; }; } }; } } } } |
| 1051 | Bound *bound = bound_stack->top();{ int cur_index; ValueStack* cur_state = cur_block->state( ); Value value; { int temp__1060 = cur_state->stack_size() ; for (cur_index = 0; cur_index < temp__1060 && (value = cur_state->stack_at(cur_index), true); cur_index += value ->type()->size()) { Phi* phi = value->as_Phi(); if ( phi != __null && phi->block() == cur_block) { BoundStack *bound_stack = _bounds.at(phi->id()); if (bound_stack && bound_stack->length() > 0) { Bound *bound = bound_stack ->top(); if ((bound->has_lower() || bound->has_upper ()) && (bound->lower_instr() != phi || bound->upper_instr () != phi || bound->lower() != 0 || bound->upper() != 0 )) { if (TraceRangeCheckElimination) { tty->fill_to(2*block ->dominator_depth()); tty->print("i%d", phi->id()); tty ->print(": "); bound->print(); tty->cr();; }; } }; } } } { int temp__1060 = cur_state->locals_size(); for (cur_index = 0; cur_index < temp__1060 && (value = cur_state ->local_at(cur_index), true); cur_index += (value == __null || value->type()->is_illegal() ? 1 : value->type()-> size())) if (value != __null) { Phi* phi = value->as_Phi() ; if (phi != __null && phi->block() == cur_block) { BoundStack *bound_stack = _bounds.at(phi->id()); if (bound_stack && bound_stack->length() > 0) { Bound *bound = bound_stack->top(); if ((bound->has_lower() || bound-> has_upper()) && (bound->lower_instr() != phi || bound ->upper_instr() != phi || bound->lower() != 0 || bound-> upper() != 0)) { if (TraceRangeCheckElimination) { tty->fill_to (2*block->dominator_depth()); tty->print("i%d", phi-> id()); tty->print(": "); bound->print(); tty->cr();; }; } }; } } } } |
| 1052 | if ((bound->has_lower() || bound->has_upper()) && (bound->lower_instr() != phi || bound->upper_instr() != phi || bound->lower() != 0 || bound->upper() != 0)) {{ int cur_index; ValueStack* cur_state = cur_block->state( ); Value value; { int temp__1060 = cur_state->stack_size() ; for (cur_index = 0; cur_index < temp__1060 && (value = cur_state->stack_at(cur_index), true); cur_index += value ->type()->size()) { Phi* phi = value->as_Phi(); if ( phi != __null && phi->block() == cur_block) { BoundStack *bound_stack = _bounds.at(phi->id()); if (bound_stack && bound_stack->length() > 0) { Bound *bound = bound_stack ->top(); if ((bound->has_lower() || bound->has_upper ()) && (bound->lower_instr() != phi || bound->upper_instr () != phi || bound->lower() != 0 || bound->upper() != 0 )) { if (TraceRangeCheckElimination) { tty->fill_to(2*block ->dominator_depth()); tty->print("i%d", phi->id()); tty ->print(": "); bound->print(); tty->cr();; }; } }; } } } { int temp__1060 = cur_state->locals_size(); for (cur_index = 0; cur_index < temp__1060 && (value = cur_state ->local_at(cur_index), true); cur_index += (value == __null || value->type()->is_illegal() ? 1 : value->type()-> size())) if (value != __null) { Phi* phi = value->as_Phi() ; if (phi != __null && phi->block() == cur_block) { BoundStack *bound_stack = _bounds.at(phi->id()); if (bound_stack && bound_stack->length() > 0) { Bound *bound = bound_stack->top(); if ((bound->has_lower() || bound-> has_upper()) && (bound->lower_instr() != phi || bound ->upper_instr() != phi || bound->lower() != 0 || bound-> upper() != 0)) { if (TraceRangeCheckElimination) { tty->fill_to (2*block->dominator_depth()); tty->print("i%d", phi-> id()); tty->print(": "); bound->print(); tty->cr();; }; } }; } } } } |
| 1053 | TRACE_RANGE_CHECK_ELIMINATION(tty->fill_to(2*block->dominator_depth());{ int cur_index; ValueStack* cur_state = cur_block->state( ); Value value; { int temp__1060 = cur_state->stack_size() ; for (cur_index = 0; cur_index < temp__1060 && (value = cur_state->stack_at(cur_index), true); cur_index += value ->type()->size()) { Phi* phi = value->as_Phi(); if ( phi != __null && phi->block() == cur_block) { BoundStack *bound_stack = _bounds.at(phi->id()); if (bound_stack && bound_stack->length() > 0) { Bound *bound = bound_stack ->top(); if ((bound->has_lower() || bound->has_upper ()) && (bound->lower_instr() != phi || bound->upper_instr () != phi || bound->lower() != 0 || bound->upper() != 0 )) { if (TraceRangeCheckElimination) { tty->fill_to(2*block ->dominator_depth()); tty->print("i%d", phi->id()); tty ->print(": "); bound->print(); tty->cr();; }; } }; } } } { int temp__1060 = cur_state->locals_size(); for (cur_index = 0; cur_index < temp__1060 && (value = cur_state ->local_at(cur_index), true); cur_index += (value == __null || value->type()->is_illegal() ? 1 : value->type()-> size())) if (value != __null) { Phi* phi = value->as_Phi() ; if (phi != __null && phi->block() == cur_block) { BoundStack *bound_stack = _bounds.at(phi->id()); if (bound_stack && bound_stack->length() > 0) { Bound *bound = bound_stack->top(); if ((bound->has_lower() || bound-> has_upper()) && (bound->lower_instr() != phi || bound ->upper_instr() != phi || bound->lower() != 0 || bound-> upper() != 0)) { if (TraceRangeCheckElimination) { tty->fill_to (2*block->dominator_depth()); tty->print("i%d", phi-> id()); tty->print(": "); bound->print(); tty->cr();; }; } }; } } } } |
| 1054 | tty->print("i%d", phi->id());{ int cur_index; ValueStack* cur_state = cur_block->state( ); Value value; { int temp__1060 = cur_state->stack_size() ; for (cur_index = 0; cur_index < temp__1060 && (value = cur_state->stack_at(cur_index), true); cur_index += value ->type()->size()) { Phi* phi = value->as_Phi(); if ( phi != __null && phi->block() == cur_block) { BoundStack *bound_stack = _bounds.at(phi->id()); if (bound_stack && bound_stack->length() > 0) { Bound *bound = bound_stack ->top(); if ((bound->has_lower() || bound->has_upper ()) && (bound->lower_instr() != phi || bound->upper_instr () != phi || bound->lower() != 0 || bound->upper() != 0 )) { if (TraceRangeCheckElimination) { tty->fill_to(2*block ->dominator_depth()); tty->print("i%d", phi->id()); tty ->print(": "); bound->print(); tty->cr();; }; } }; } } } { int temp__1060 = cur_state->locals_size(); for (cur_index = 0; cur_index < temp__1060 && (value = cur_state ->local_at(cur_index), true); cur_index += (value == __null || value->type()->is_illegal() ? 1 : value->type()-> size())) if (value != __null) { Phi* phi = value->as_Phi() ; if (phi != __null && phi->block() == cur_block) { BoundStack *bound_stack = _bounds.at(phi->id()); if (bound_stack && bound_stack->length() > 0) { Bound *bound = bound_stack->top(); if ((bound->has_lower() || bound-> has_upper()) && (bound->lower_instr() != phi || bound ->upper_instr() != phi || bound->lower() != 0 || bound-> upper() != 0)) { if (TraceRangeCheckElimination) { tty->fill_to (2*block->dominator_depth()); tty->print("i%d", phi-> id()); tty->print(": "); bound->print(); tty->cr();; }; } }; } } } } |
| 1055 | tty->print(": ");{ int cur_index; ValueStack* cur_state = cur_block->state( ); Value value; { int temp__1060 = cur_state->stack_size() ; for (cur_index = 0; cur_index < temp__1060 && (value = cur_state->stack_at(cur_index), true); cur_index += value ->type()->size()) { Phi* phi = value->as_Phi(); if ( phi != __null && phi->block() == cur_block) { BoundStack *bound_stack = _bounds.at(phi->id()); if (bound_stack && bound_stack->length() > 0) { Bound *bound = bound_stack ->top(); if ((bound->has_lower() || bound->has_upper ()) && (bound->lower_instr() != phi || bound->upper_instr () != phi || bound->lower() != 0 || bound->upper() != 0 )) { if (TraceRangeCheckElimination) { tty->fill_to(2*block ->dominator_depth()); tty->print("i%d", phi->id()); tty ->print(": "); bound->print(); tty->cr();; }; } }; } } } { int temp__1060 = cur_state->locals_size(); for (cur_index = 0; cur_index < temp__1060 && (value = cur_state ->local_at(cur_index), true); cur_index += (value == __null || value->type()->is_illegal() ? 1 : value->type()-> size())) if (value != __null) { Phi* phi = value->as_Phi() ; if (phi != __null && phi->block() == cur_block) { BoundStack *bound_stack = _bounds.at(phi->id()); if (bound_stack && bound_stack->length() > 0) { Bound *bound = bound_stack->top(); if ((bound->has_lower() || bound-> has_upper()) && (bound->lower_instr() != phi || bound ->upper_instr() != phi || bound->lower() != 0 || bound-> upper() != 0)) { if (TraceRangeCheckElimination) { tty->fill_to (2*block->dominator_depth()); tty->print("i%d", phi-> id()); tty->print(": "); bound->print(); tty->cr();; }; } }; } } } } |
| 1056 | bound->print();{ int cur_index; ValueStack* cur_state = cur_block->state( ); Value value; { int temp__1060 = cur_state->stack_size() ; for (cur_index = 0; cur_index < temp__1060 && (value = cur_state->stack_at(cur_index), true); cur_index += value ->type()->size()) { Phi* phi = value->as_Phi(); if ( phi != __null && phi->block() == cur_block) { BoundStack *bound_stack = _bounds.at(phi->id()); if (bound_stack && bound_stack->length() > 0) { Bound *bound = bound_stack ->top(); if ((bound->has_lower() || bound->has_upper ()) && (bound->lower_instr() != phi || bound->upper_instr () != phi || bound->lower() != 0 || bound->upper() != 0 )) { if (TraceRangeCheckElimination) { tty->fill_to(2*block ->dominator_depth()); tty->print("i%d", phi->id()); tty ->print(": "); bound->print(); tty->cr();; }; } }; } } } { int temp__1060 = cur_state->locals_size(); for (cur_index = 0; cur_index < temp__1060 && (value = cur_state ->local_at(cur_index), true); cur_index += (value == __null || value->type()->is_illegal() ? 1 : value->type()-> size())) if (value != __null) { Phi* phi = value->as_Phi() ; if (phi != __null && phi->block() == cur_block) { BoundStack *bound_stack = _bounds.at(phi->id()); if (bound_stack && bound_stack->length() > 0) { Bound *bound = bound_stack->top(); if ((bound->has_lower() || bound-> has_upper()) && (bound->lower_instr() != phi || bound ->upper_instr() != phi || bound->lower() != 0 || bound-> upper() != 0)) { if (TraceRangeCheckElimination) { tty->fill_to (2*block->dominator_depth()); tty->print("i%d", phi-> id()); tty->print(": "); bound->print(); tty->cr();; }; } }; } } } } |
| 1057 | tty->cr();{ int cur_index; ValueStack* cur_state = cur_block->state( ); Value value; { int temp__1060 = cur_state->stack_size() ; for (cur_index = 0; cur_index < temp__1060 && (value = cur_state->stack_at(cur_index), true); cur_index += value ->type()->size()) { Phi* phi = value->as_Phi(); if ( phi != __null && phi->block() == cur_block) { BoundStack *bound_stack = _bounds.at(phi->id()); if (bound_stack && bound_stack->length() > 0) { Bound *bound = bound_stack ->top(); if ((bound->has_lower() || bound->has_upper ()) && (bound->lower_instr() != phi || bound->upper_instr () != phi || bound->lower() != 0 || bound->upper() != 0 )) { if (TraceRangeCheckElimination) { tty->fill_to(2*block ->dominator_depth()); tty->print("i%d", phi->id()); tty ->print(": "); bound->print(); tty->cr();; }; } }; } } } { int temp__1060 = cur_state->locals_size(); for (cur_index = 0; cur_index < temp__1060 && (value = cur_state ->local_at(cur_index), true); cur_index += (value == __null || value->type()->is_illegal() ? 1 : value->type()-> size())) if (value != __null) { Phi* phi = value->as_Phi() ; if (phi != __null && phi->block() == cur_block) { BoundStack *bound_stack = _bounds.at(phi->id()); if (bound_stack && bound_stack->length() > 0) { Bound *bound = bound_stack->top(); if ((bound->has_lower() || bound-> has_upper()) && (bound->lower_instr() != phi || bound ->upper_instr() != phi || bound->lower() != 0 || bound-> upper() != 0)) { if (TraceRangeCheckElimination) { tty->fill_to (2*block->dominator_depth()); tty->print("i%d", phi-> id()); tty->print(": "); bound->print(); tty->cr();; }; } }; } } } } |
| 1058 | );{ int cur_index; ValueStack* cur_state = cur_block->state( ); Value value; { int temp__1060 = cur_state->stack_size() ; for (cur_index = 0; cur_index < temp__1060 && (value = cur_state->stack_at(cur_index), true); cur_index += value ->type()->size()) { Phi* phi = value->as_Phi(); if ( phi != __null && phi->block() == cur_block) { BoundStack *bound_stack = _bounds.at(phi->id()); if (bound_stack && bound_stack->length() > 0) { Bound *bound = bound_stack ->top(); if ((bound->has_lower() || bound->has_upper ()) && (bound->lower_instr() != phi || bound->upper_instr () != phi || bound->lower() != 0 || bound->upper() != 0 )) { if (TraceRangeCheckElimination) { tty->fill_to(2*block ->dominator_depth()); tty->print("i%d", phi->id()); tty ->print(": "); bound->print(); tty->cr();; }; } }; } } } { int temp__1060 = cur_state->locals_size(); for (cur_index = 0; cur_index < temp__1060 && (value = cur_state ->local_at(cur_index), true); cur_index += (value == __null || value->type()->is_illegal() ? 1 : value->type()-> size())) if (value != __null) { Phi* phi = value->as_Phi() ; if (phi != __null && phi->block() == cur_block) { BoundStack *bound_stack = _bounds.at(phi->id()); if (bound_stack && bound_stack->length() > 0) { Bound *bound = bound_stack->top(); if ((bound->has_lower() || bound-> has_upper()) && (bound->lower_instr() != phi || bound ->upper_instr() != phi || bound->lower() != 0 || bound-> upper() != 0)) { if (TraceRangeCheckElimination) { tty->fill_to (2*block->dominator_depth()); tty->print("i%d", phi-> id()); tty->print(": "); bound->print(); tty->cr();; }; } }; } } } } |
| 1059 | }{ int cur_index; ValueStack* cur_state = cur_block->state( ); Value value; { int temp__1060 = cur_state->stack_size() ; for (cur_index = 0; cur_index < temp__1060 && (value = cur_state->stack_at(cur_index), true); cur_index += value ->type()->size()) { Phi* phi = value->as_Phi(); if ( phi != __null && phi->block() == cur_block) { BoundStack *bound_stack = _bounds.at(phi->id()); if (bound_stack && bound_stack->length() > 0) { Bound *bound = bound_stack ->top(); if ((bound->has_lower() || bound->has_upper ()) && (bound->lower_instr() != phi || bound->upper_instr () != phi || bound->lower() != 0 || bound->upper() != 0 )) { if (TraceRangeCheckElimination) { tty->fill_to(2*block ->dominator_depth()); tty->print("i%d", phi->id()); tty ->print(": "); bound->print(); tty->cr();; }; } }; } } } { int temp__1060 = cur_state->locals_size(); for (cur_index = 0; cur_index < temp__1060 && (value = cur_state ->local_at(cur_index), true); cur_index += (value == __null || value->type()->is_illegal() ? 1 : value->type()-> size())) if (value != __null) { Phi* phi = value->as_Phi() ; if (phi != __null && phi->block() == cur_block) { BoundStack *bound_stack = _bounds.at(phi->id()); if (bound_stack && bound_stack->length() > 0) { Bound *bound = bound_stack->top(); if ((bound->has_lower() || bound-> has_upper()) && (bound->lower_instr() != phi || bound ->upper_instr() != phi || bound->lower() != 0 || bound-> upper() != 0)) { if (TraceRangeCheckElimination) { tty->fill_to (2*block->dominator_depth()); tty->print("i%d", phi-> id()); tty->print(": "); bound->print(); tty->cr();; }; } }; } } } } |
| 1060 | }){ int cur_index; ValueStack* cur_state = cur_block->state( ); Value value; { int temp__1060 = cur_state->stack_size() ; for (cur_index = 0; cur_index < temp__1060 && (value = cur_state->stack_at(cur_index), true); cur_index += value ->type()->size()) { Phi* phi = value->as_Phi(); if ( phi != __null && phi->block() == cur_block) { BoundStack *bound_stack = _bounds.at(phi->id()); if (bound_stack && bound_stack->length() > 0) { Bound *bound = bound_stack ->top(); if ((bound->has_lower() || bound->has_upper ()) && (bound->lower_instr() != phi || bound->upper_instr () != phi || bound->lower() != 0 || bound->upper() != 0 )) { if (TraceRangeCheckElimination) { tty->fill_to(2*block ->dominator_depth()); tty->print("i%d", phi->id()); tty ->print(": "); bound->print(); tty->cr();; }; } }; } } } { int temp__1060 = cur_state->locals_size(); for (cur_index = 0; cur_index < temp__1060 && (value = cur_state ->local_at(cur_index), true); cur_index += (value == __null || value->type()->is_illegal() ? 1 : value->type()-> size())) if (value != __null) { Phi* phi = value->as_Phi() ; if (phi != __null && phi->block() == cur_block) { BoundStack *bound_stack = _bounds.at(phi->id()); if (bound_stack && bound_stack->length() > 0) { Bound *bound = bound_stack->top(); if ((bound->has_lower() || bound-> has_upper()) && (bound->lower_instr() != phi || bound ->upper_instr() != phi || bound->lower() != 0 || bound-> upper() != 0)) { if (TraceRangeCheckElimination) { tty->fill_to (2*block->dominator_depth()); tty->print("i%d", phi-> id()); tty->print(": "); bound->print(); tty->cr();; }; } }; } } } }; |
| 1061 | |
| 1062 | while (!instr->as_BlockEnd()) { |
| 1063 | if (instr->id() < _bounds.length()) { |
| 1064 | BoundStack *bound_stack = _bounds.at(instr->id()); |
| 1065 | if (bound_stack && bound_stack->length() > 0) { |
| 1066 | Bound *bound = bound_stack->top(); |
| 1067 | if ((bound->has_lower() || bound->has_upper()) && (bound->lower_instr() != instr || bound->upper_instr() != instr || bound->lower() != 0 || bound->upper() != 0)) { |
| 1068 | TRACE_RANGE_CHECK_ELIMINATION(tty->fill_to(2*block->dominator_depth());if (TraceRangeCheckElimination) { tty->fill_to(2*block-> dominator_depth()); tty->print("i%d", instr->id()); tty ->print(": "); bound->print(); tty->cr();; } |
| 1069 | tty->print("i%d", instr->id());if (TraceRangeCheckElimination) { tty->fill_to(2*block-> dominator_depth()); tty->print("i%d", instr->id()); tty ->print(": "); bound->print(); tty->cr();; } |
| 1070 | tty->print(": ");if (TraceRangeCheckElimination) { tty->fill_to(2*block-> dominator_depth()); tty->print("i%d", instr->id()); tty ->print(": "); bound->print(); tty->cr();; } |
| 1071 | bound->print();if (TraceRangeCheckElimination) { tty->fill_to(2*block-> dominator_depth()); tty->print("i%d", instr->id()); tty ->print(": "); bound->print(); tty->cr();; } |
| 1072 | tty->cr();if (TraceRangeCheckElimination) { tty->fill_to(2*block-> dominator_depth()); tty->print("i%d", instr->id()); tty ->print(": "); bound->print(); tty->cr();; } |
| 1073 | )if (TraceRangeCheckElimination) { tty->fill_to(2*block-> dominator_depth()); tty->print("i%d", instr->id()); tty ->print(": "); bound->print(); tty->cr();; }; |
| 1074 | } |
| 1075 | } |
| 1076 | } |
| 1077 | instr = instr->next(); |
| 1078 | } |
| 1079 | } |
| 1080 | } |
| 1081 | #endif |
| 1082 | |
| 1083 | #ifdef ASSERT1 |
| 1084 | // Verification or the IR |
| 1085 | RangeCheckEliminator::Verification::Verification(IR *ir) : _used(BlockBegin::number_of_blocks(), BlockBegin::number_of_blocks(), false) { |
| 1086 | this->_ir = ir; |
| 1087 | ir->iterate_linear_scan_order(this); |
| 1088 | } |
| 1089 | |
| 1090 | // Verify this block |
| 1091 | void RangeCheckEliminator::Verification::block_do(BlockBegin *block) { |
| 1092 | If *cond = block->end()->as_If(); |
| 1093 | // Watch out: tsux and fsux can be the same! |
| 1094 | if (block->number_of_sux() > 1) { |
| 1095 | for (int i=0; i<block->number_of_sux(); i++) { |
| 1096 | BlockBegin *sux = block->sux_at(i); |
| 1097 | BlockBegin *pred = NULL__null; |
| 1098 | for (int j=0; j<sux->number_of_preds(); j++) { |
| 1099 | BlockBegin *cur = sux->pred_at(j); |
| 1100 | assert(cur != NULL, "Predecessor must not be null")do { if (!(cur != __null)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 1100, "assert(" "cur != __null" ") failed", "Predecessor must not be null" ); ::breakpoint(); } } while (0); |
| 1101 | if (!pred) { |
| 1102 | pred = cur; |
| 1103 | } |
| 1104 | assert(cur == pred, "Block must not have more than one predecessor if its predecessor has more than one successor")do { if (!(cur == pred)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 1104, "assert(" "cur == pred" ") failed", "Block must not have more than one predecessor if its predecessor has more than one successor" ); ::breakpoint(); } } while (0); |
| 1105 | } |
| 1106 | assert(sux->number_of_preds() >= 1, "Block must have at least one predecessor")do { if (!(sux->number_of_preds() >= 1)) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 1106, "assert(" "sux->number_of_preds() >= 1" ") failed" , "Block must have at least one predecessor"); ::breakpoint() ; } } while (0); |
| 1107 | assert(sux->pred_at(0) == block, "Wrong successor")do { if (!(sux->pred_at(0) == block)) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 1107, "assert(" "sux->pred_at(0) == block" ") failed", "Wrong successor" ); ::breakpoint(); } } while (0); |
| 1108 | } |
| 1109 | } |
| 1110 | |
| 1111 | BlockBegin *dominator = block->dominator(); |
| 1112 | if (dominator) { |
| 1113 | assert(block != _ir->start(), "Start block must not have a dominator!")do { if (!(block != _ir->start())) { (*g_assert_poison) = 'X' ;; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 1113, "assert(" "block != _ir->start()" ") failed", "Start block must not have a dominator!" ); ::breakpoint(); } } while (0); |
| 1114 | assert(can_reach(dominator, block), "Dominator can't reach his block !")do { if (!(can_reach(dominator, block))) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 1114, "assert(" "can_reach(dominator, block)" ") failed", "Dominator can't reach his block !" ); ::breakpoint(); } } while (0); |
| 1115 | assert(can_reach(_ir->start(), dominator), "Dominator is unreachable !")do { if (!(can_reach(_ir->start(), dominator))) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 1115, "assert(" "can_reach(_ir->start(), dominator)" ") failed" , "Dominator is unreachable !"); ::breakpoint(); } } while (0 ); |
| 1116 | assert(!can_reach(_ir->start(), block, dominator), "Wrong dominator ! Block can be reached anyway !")do { if (!(!can_reach(_ir->start(), block, dominator))) { ( *g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 1116, "assert(" "!can_reach(_ir->start(), block, dominator)" ") failed", "Wrong dominator ! Block can be reached anyway !" ); ::breakpoint(); } } while (0); |
| 1117 | BlockList *all_blocks = _ir->linear_scan_order(); |
| 1118 | for (int i=0; i<all_blocks->length(); i++) { |
| 1119 | BlockBegin *cur = all_blocks->at(i); |
| 1120 | if (cur != dominator && cur != block) { |
| 1121 | assert(can_reach(dominator, block, cur), "There has to be another dominator!")do { if (!(can_reach(dominator, block, cur))) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 1121, "assert(" "can_reach(dominator, block, cur)" ") failed" , "There has to be another dominator!"); ::breakpoint(); } } while (0); |
| 1122 | } |
| 1123 | } |
| 1124 | } else { |
| 1125 | assert(block == _ir->start(), "Only start block must not have a dominator")do { if (!(block == _ir->start())) { (*g_assert_poison) = 'X' ;; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 1125, "assert(" "block == _ir->start()" ") failed", "Only start block must not have a dominator" ); ::breakpoint(); } } while (0); |
| 1126 | } |
| 1127 | |
| 1128 | if (block->is_set(BlockBegin::linear_scan_loop_header_flag)) { |
| 1129 | int loop_index = block->loop_index(); |
| 1130 | BlockList *all_blocks = _ir->linear_scan_order(); |
| 1131 | assert(block->number_of_preds() >= 1, "Block must have at least one predecessor")do { if (!(block->number_of_preds() >= 1)) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 1131, "assert(" "block->number_of_preds() >= 1" ") failed" , "Block must have at least one predecessor"); ::breakpoint() ; } } while (0); |
| 1132 | assert(!block->is_set(BlockBegin::exception_entry_flag), "Loop header must not be exception handler!")do { if (!(!block->is_set(BlockBegin::exception_entry_flag ))) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 1132, "assert(" "!block->is_set(BlockBegin::exception_entry_flag)" ") failed", "Loop header must not be exception handler!"); :: breakpoint(); } } while (0); |
| 1133 | |
| 1134 | bool loop_through_xhandler = false; |
| 1135 | for (int i=0; i<block->number_of_sux(); i++) { |
| 1136 | BlockBegin *sux = block->sux_at(i); |
| 1137 | if (!loop_through_xhandler) { |
| 1138 | if (sux->loop_depth() == block->loop_depth() && sux->loop_index() != block->loop_index()) { |
| 1139 | loop_through_xhandler = is_backbranch_from_xhandler(block); |
| 1140 | assert(loop_through_xhandler, "Loop indices have to be the same if same depths but no backbranch from xhandler")do { if (!(loop_through_xhandler)) { (*g_assert_poison) = 'X' ;; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 1140, "assert(" "loop_through_xhandler" ") failed", "Loop indices have to be the same if same depths but no backbranch from xhandler" ); ::breakpoint(); } } while (0); |
| 1141 | } |
| 1142 | } |
| 1143 | assert(sux->loop_depth() == block->loop_depth() || sux->loop_index() != block->loop_index(), "Loop index has to be different")do { if (!(sux->loop_depth() == block->loop_depth() || sux ->loop_index() != block->loop_index())) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 1143, "assert(" "sux->loop_depth() == block->loop_depth() || sux->loop_index() != block->loop_index()" ") failed", "Loop index has to be different"); ::breakpoint( ); } } while (0); |
| 1144 | } |
| 1145 | |
| 1146 | for (int i=0; i<all_blocks->length(); i++) { |
| 1147 | BlockBegin *cur = all_blocks->at(i); |
| 1148 | if (cur->loop_index() == loop_index && cur != block) { |
| 1149 | assert(dominates(block->dominator(), cur), "Dominator of loop header must dominate all loop blocks")do { if (!(dominates(block->dominator(), cur))) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 1149, "assert(" "dominates(block->dominator(), cur)" ") failed" , "Dominator of loop header must dominate all loop blocks"); :: breakpoint(); } } while (0); |
| 1150 | } |
| 1151 | } |
| 1152 | } |
| 1153 | |
| 1154 | Instruction *cur = block; |
| 1155 | while (cur) { |
| 1156 | assert(cur->block() == block, "Block begin has to be set correctly!")do { if (!(cur->block() == block)) { (*g_assert_poison) = 'X' ;; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 1156, "assert(" "cur->block() == block" ") failed", "Block begin has to be set correctly!" ); ::breakpoint(); } } while (0); |
| 1157 | cur = cur->next(); |
| 1158 | } |
| 1159 | } |
| 1160 | |
| 1161 | // Called when a successor of a block has the same loop depth but a different loop index. This can happen if a backbranch comes from |
| 1162 | // an exception handler of a loop head block, for example, when a loop is only executed once on the non-exceptional path but is |
| 1163 | // repeated in case of an exception. In this case, the edge block->sux is not critical and was not split before. |
| 1164 | // Check if there is such a backbranch from an xhandler of 'block'. |
| 1165 | bool RangeCheckEliminator::Verification::is_backbranch_from_xhandler(BlockBegin* block) { |
| 1166 | for (int i = 0; i < block->number_of_exception_handlers(); i++) { |
| 1167 | BlockBegin *xhandler = block->exception_handler_at(i); |
| 1168 | for (int j = 0; j < block->number_of_preds(); j++) { |
| 1169 | if (dominates(xhandler, block->pred_at(j)) || xhandler == block->pred_at(j)) { |
| 1170 | return true; |
| 1171 | } |
| 1172 | } |
| 1173 | } |
| 1174 | |
| 1175 | // In case of nested xhandlers, we need to walk through the loop (and all blocks belonging to exception handlers) |
| 1176 | // to find an xhandler of 'block'. |
| 1177 | if (block->number_of_exception_handlers() > 0) { |
| 1178 | for (int i = 0; i < block->number_of_preds(); i++) { |
| 1179 | BlockBegin* pred = block->pred_at(i); |
| 1180 | if (pred->loop_index() == block->loop_index()) { |
| 1181 | // Only check blocks that belong to the loop |
| 1182 | // Do a BFS to find an xhandler block of 'block' starting from 'pred' |
| 1183 | ResourceMark rm; |
| 1184 | ResourceBitMap visited(BlockBegin::number_of_blocks()); |
| 1185 | BlockBeginList list; |
| 1186 | list.push(pred); |
| 1187 | while (!list.is_empty()) { |
| 1188 | BlockBegin* next = list.pop(); |
| 1189 | if (!visited.at(next->block_id())) { |
| 1190 | visited.set_bit(next->block_id()); |
| 1191 | for (int j = 0; j < block->number_of_exception_handlers(); j++) { |
| 1192 | if (next == block->exception_handler_at(j)) { |
| 1193 | return true; |
| 1194 | } |
| 1195 | } |
| 1196 | for (int j = 0; j < next->number_of_preds(); j++) { |
| 1197 | if (next->pred_at(j) != block) { |
| 1198 | list.push(next->pred_at(j)); |
| 1199 | } |
| 1200 | } |
| 1201 | } |
| 1202 | } |
| 1203 | } |
| 1204 | } |
| 1205 | } |
| 1206 | return false; |
| 1207 | } |
| 1208 | |
| 1209 | // Loop header must dominate all loop blocks |
| 1210 | bool RangeCheckEliminator::Verification::dominates(BlockBegin *dominator, BlockBegin *block) { |
| 1211 | BlockBegin *cur = block->dominator(); |
| 1212 | while (cur && cur != dominator) { |
| 1213 | cur = cur->dominator(); |
| 1214 | } |
| 1215 | return cur == dominator; |
| 1216 | } |
| 1217 | |
| 1218 | // Try to reach Block end beginning in Block start and not using Block dont_use |
| 1219 | bool RangeCheckEliminator::Verification::can_reach(BlockBegin *start, BlockBegin *end, BlockBegin *dont_use /* = NULL */) { |
| 1220 | if (start == end) return start != dont_use; |
| 1221 | // Simple BSF from start to end |
| 1222 | // BlockBeginList _current; |
| 1223 | for (int i=0; i < _used.length(); i++) { |
| 1224 | _used.at_put(i, false); |
| 1225 | } |
| 1226 | _current.trunc_to(0); |
| 1227 | _successors.trunc_to(0); |
| 1228 | if (start != dont_use) { |
| 1229 | _current.push(start); |
| 1230 | _used.at_put(start->block_id(), true); |
| 1231 | } |
| 1232 | |
| 1233 | // BlockBeginList _successors; |
| 1234 | while (_current.length() > 0) { |
| 1235 | BlockBegin *cur = _current.pop(); |
| 1236 | // Add exception handlers to list |
| 1237 | for (int i=0; i<cur->number_of_exception_handlers(); i++) { |
| 1238 | BlockBegin *xhandler = cur->exception_handler_at(i); |
| 1239 | _successors.push(xhandler); |
| 1240 | // Add exception handlers of _successors to list |
| 1241 | for (int j=0; j<xhandler->number_of_exception_handlers(); j++) { |
| 1242 | BlockBegin *sux_xhandler = xhandler->exception_handler_at(j); |
| 1243 | _successors.push(sux_xhandler); |
| 1244 | } |
| 1245 | } |
| 1246 | // Add normal _successors to list |
| 1247 | for (int i=0; i<cur->number_of_sux(); i++) { |
| 1248 | BlockBegin *sux = cur->sux_at(i); |
| 1249 | _successors.push(sux); |
| 1250 | // Add exception handlers of _successors to list |
| 1251 | for (int j=0; j<sux->number_of_exception_handlers(); j++) { |
| 1252 | BlockBegin *xhandler = sux->exception_handler_at(j); |
| 1253 | _successors.push(xhandler); |
| 1254 | } |
| 1255 | } |
| 1256 | for (int i=0; i<_successors.length(); i++) { |
| 1257 | BlockBegin *sux = _successors.at(i); |
| 1258 | assert(sux != NULL, "Successor must not be NULL!")do { if (!(sux != __null)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 1258, "assert(" "sux != __null" ") failed", "Successor must not be NULL!" ); ::breakpoint(); } } while (0); |
| 1259 | if (sux == end) { |
| 1260 | return true; |
| 1261 | } |
| 1262 | if (sux != dont_use && !_used.at(sux->block_id())) { |
| 1263 | _used.at_put(sux->block_id(), true); |
| 1264 | _current.push(sux); |
| 1265 | } |
| 1266 | } |
| 1267 | _successors.trunc_to(0); |
| 1268 | } |
| 1269 | |
| 1270 | return false; |
| 1271 | } |
| 1272 | #endif // ASSERT |
| 1273 | |
| 1274 | // Bound |
| 1275 | RangeCheckEliminator::Bound::~Bound() { |
| 1276 | } |
| 1277 | |
| 1278 | // Bound constructor |
| 1279 | RangeCheckEliminator::Bound::Bound() { |
| 1280 | this->_lower = min_jint; |
| 1281 | this->_upper = max_jint; |
| 1282 | this->_lower_instr = NULL__null; |
| 1283 | this->_upper_instr = NULL__null; |
| 1284 | } |
| 1285 | |
| 1286 | // Bound constructor |
| 1287 | RangeCheckEliminator::Bound::Bound(int lower, Value lower_instr, int upper, Value upper_instr) { |
| 1288 | assert(!lower_instr || !lower_instr->as_Constant() || !lower_instr->type()->as_IntConstant(), "Must not be constant!")do { if (!(!lower_instr || !lower_instr->as_Constant() || ! lower_instr->type()->as_IntConstant())) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 1288, "assert(" "!lower_instr || !lower_instr->as_Constant() || !lower_instr->type()->as_IntConstant()" ") failed", "Must not be constant!"); ::breakpoint(); } } while (0); |
| 1289 | assert(!upper_instr || !upper_instr->as_Constant() || !upper_instr->type()->as_IntConstant(), "Must not be constant!")do { if (!(!upper_instr || !upper_instr->as_Constant() || ! upper_instr->type()->as_IntConstant())) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 1289, "assert(" "!upper_instr || !upper_instr->as_Constant() || !upper_instr->type()->as_IntConstant()" ") failed", "Must not be constant!"); ::breakpoint(); } } while (0); |
| 1290 | this->_lower = lower; |
| 1291 | this->_upper = upper; |
| 1292 | this->_lower_instr = lower_instr; |
| 1293 | this->_upper_instr = upper_instr; |
| 1294 | } |
| 1295 | |
| 1296 | // Bound constructor |
| 1297 | RangeCheckEliminator::Bound::Bound(Instruction::Condition cond, Value v, int constant) { |
| 1298 | assert(!v || (v->type() && (v->type()->as_IntType() || v->type()->as_ObjectType())), "Type must be array or integer!")do { if (!(!v || (v->type() && (v->type()->as_IntType () || v->type()->as_ObjectType())))) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 1298, "assert(" "!v || (v->type() && (v->type()->as_IntType() || v->type()->as_ObjectType()))" ") failed", "Type must be array or integer!"); ::breakpoint( ); } } while (0); |
| 1299 | assert(!v || !v->as_Constant() || !v->type()->as_IntConstant(), "Must not be constant!")do { if (!(!v || !v->as_Constant() || !v->type()->as_IntConstant ())) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 1299, "assert(" "!v || !v->as_Constant() || !v->type()->as_IntConstant()" ") failed", "Must not be constant!"); ::breakpoint(); } } while (0); |
| 1300 | |
| 1301 | if (cond == Instruction::eql) { |
| 1302 | _lower = constant; |
| 1303 | _lower_instr = v; |
| 1304 | _upper = constant; |
| 1305 | _upper_instr = v; |
| 1306 | } else if (cond == Instruction::neq) { |
| 1307 | _lower = min_jint; |
| 1308 | _upper = max_jint; |
| 1309 | _lower_instr = NULL__null; |
| 1310 | _upper_instr = NULL__null; |
| 1311 | if (v == NULL__null) { |
| 1312 | if (constant == min_jint) { |
| 1313 | _lower++; |
| 1314 | } |
| 1315 | if (constant == max_jint) { |
| 1316 | _upper--; |
| 1317 | } |
| 1318 | } |
| 1319 | } else if (cond == Instruction::geq) { |
| 1320 | _lower = constant; |
| 1321 | _lower_instr = v; |
| 1322 | _upper = max_jint; |
| 1323 | _upper_instr = NULL__null; |
| 1324 | } else if (cond == Instruction::leq) { |
| 1325 | _lower = min_jint; |
| 1326 | _lower_instr = NULL__null; |
| 1327 | _upper = constant; |
| 1328 | _upper_instr = v; |
| 1329 | } else { |
| 1330 | ShouldNotReachHere()do { (*g_assert_poison) = 'X';; report_should_not_reach_here( "/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 1330); ::breakpoint(); } while (0); |
| 1331 | } |
| 1332 | } |
| 1333 | |
| 1334 | // Set lower |
| 1335 | void RangeCheckEliminator::Bound::set_lower(int value, Value v) { |
| 1336 | assert(!v || !v->as_Constant() || !v->type()->as_IntConstant(), "Must not be constant!")do { if (!(!v || !v->as_Constant() || !v->type()->as_IntConstant ())) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 1336, "assert(" "!v || !v->as_Constant() || !v->type()->as_IntConstant()" ") failed", "Must not be constant!"); ::breakpoint(); } } while (0); |
| 1337 | this->_lower = value; |
| 1338 | this->_lower_instr = v; |
| 1339 | } |
| 1340 | |
| 1341 | // Set upper |
| 1342 | void RangeCheckEliminator::Bound::set_upper(int value, Value v) { |
| 1343 | assert(!v || !v->as_Constant() || !v->type()->as_IntConstant(), "Must not be constant!")do { if (!(!v || !v->as_Constant() || !v->type()->as_IntConstant ())) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 1343, "assert(" "!v || !v->as_Constant() || !v->type()->as_IntConstant()" ") failed", "Must not be constant!"); ::breakpoint(); } } while (0); |
| 1344 | this->_upper = value; |
| 1345 | this->_upper_instr = v; |
| 1346 | } |
| 1347 | |
| 1348 | // Add constant -> no overflow may occur |
| 1349 | void RangeCheckEliminator::Bound::add_constant(int value) { |
| 1350 | this->_lower += value; |
| 1351 | this->_upper += value; |
| 1352 | } |
| 1353 | |
| 1354 | // or |
| 1355 | void RangeCheckEliminator::Bound::or_op(Bound *b) { |
| 1356 | // Watch out, bound is not guaranteed not to overflow! |
| 1357 | // Update lower bound |
| 1358 | if (_lower_instr != b->_lower_instr || (_lower_instr && _lower != b->_lower)) { |
| 1359 | _lower_instr = NULL__null; |
| 1360 | _lower = min_jint; |
| 1361 | } else { |
| 1362 | _lower = MIN2(_lower, b->_lower); |
| 1363 | } |
| 1364 | // Update upper bound |
| 1365 | if (_upper_instr != b->_upper_instr || (_upper_instr && _upper != b->_upper)) { |
| 1366 | _upper_instr = NULL__null; |
| 1367 | _upper = max_jint; |
| 1368 | } else { |
| 1369 | _upper = MAX2(_upper, b->_upper); |
| 1370 | } |
| 1371 | } |
| 1372 | |
| 1373 | // and |
| 1374 | void RangeCheckEliminator::Bound::and_op(Bound *b) { |
| 1375 | // Update lower bound |
| 1376 | if (_lower_instr == b->_lower_instr) { |
| 1377 | _lower = MAX2(_lower, b->_lower); |
| 1378 | } |
| 1379 | if (b->has_lower()) { |
| 1380 | bool set = true; |
| 1381 | if (_lower_instr != NULL__null && b->_lower_instr != NULL__null) { |
| 1382 | set = (_lower_instr->dominator_depth() > b->_lower_instr->dominator_depth()); |
| 1383 | } |
| 1384 | if (set) { |
| 1385 | _lower = b->_lower; |
| 1386 | _lower_instr = b->_lower_instr; |
| 1387 | } |
| 1388 | } |
| 1389 | // Update upper bound |
| 1390 | if (_upper_instr == b->_upper_instr) { |
| 1391 | _upper = MIN2(_upper, b->_upper); |
| 1392 | } |
| 1393 | if (b->has_upper()) { |
| 1394 | bool set = true; |
| 1395 | if (_upper_instr != NULL__null && b->_upper_instr != NULL__null) { |
| 1396 | set = (_upper_instr->dominator_depth() > b->_upper_instr->dominator_depth()); |
| 1397 | } |
| 1398 | if (set) { |
| 1399 | _upper = b->_upper; |
| 1400 | _upper_instr = b->_upper_instr; |
| 1401 | } |
| 1402 | } |
| 1403 | } |
| 1404 | |
| 1405 | // has_upper |
| 1406 | bool RangeCheckEliminator::Bound::has_upper() { |
| 1407 | return _upper_instr != NULL__null || _upper < max_jint; |
| 1408 | } |
| 1409 | |
| 1410 | // is_smaller |
| 1411 | bool RangeCheckEliminator::Bound::is_smaller(Bound *b) { |
| 1412 | if (b->_lower_instr != _upper_instr) { |
| 1413 | return false; |
| 1414 | } |
| 1415 | return _upper < b->_lower; |
| 1416 | } |
| 1417 | |
| 1418 | // has_lower |
| 1419 | bool RangeCheckEliminator::Bound::has_lower() { |
| 1420 | return _lower_instr != NULL__null || _lower > min_jint; |
| 1421 | } |
| 1422 | |
| 1423 | // in_array_bound |
| 1424 | bool RangeCheckEliminator::in_array_bound(Bound *bound, Value array){ |
| 1425 | if (!bound) return false; |
| 1426 | assert(array != NULL, "Must not be null!")do { if (!(array != __null)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 1426, "assert(" "array != __null" ") failed", "Must not be null!" ); ::breakpoint(); } } while (0); |
| 1427 | assert(bound != NULL, "Must not be null!")do { if (!(bound != __null)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 1427, "assert(" "bound != __null" ") failed", "Must not be null!" ); ::breakpoint(); } } while (0); |
| 1428 | if (bound->lower() >=0 && bound->lower_instr() == NULL__null && bound->upper() < 0 && bound->upper_instr() != NULL__null) { |
| 1429 | ArrayLength *len = bound->upper_instr()->as_ArrayLength(); |
| 1430 | if (bound->upper_instr() == array || (len != NULL__null && len->array() == array)) { |
| 1431 | return true; |
| 1432 | } |
| 1433 | } |
| 1434 | return false; |
| 1435 | } |
| 1436 | |
| 1437 | // remove_lower |
| 1438 | void RangeCheckEliminator::Bound::remove_lower() { |
| 1439 | _lower = min_jint; |
| 1440 | _lower_instr = NULL__null; |
| 1441 | } |
| 1442 | |
| 1443 | // remove_upper |
| 1444 | void RangeCheckEliminator::Bound::remove_upper() { |
| 1445 | _upper = max_jint; |
| 1446 | _upper_instr = NULL__null; |
| 1447 | } |
| 1448 | |
| 1449 | // upper |
| 1450 | int RangeCheckEliminator::Bound::upper() { |
| 1451 | return _upper; |
| 1452 | } |
| 1453 | |
| 1454 | // lower |
| 1455 | int RangeCheckEliminator::Bound::lower() { |
| 1456 | return _lower; |
| 1457 | } |
| 1458 | |
| 1459 | // upper_instr |
| 1460 | Value RangeCheckEliminator::Bound::upper_instr() { |
| 1461 | return _upper_instr; |
| 1462 | } |
| 1463 | |
| 1464 | // lower_instr |
| 1465 | Value RangeCheckEliminator::Bound::lower_instr() { |
| 1466 | return _lower_instr; |
| 1467 | } |
| 1468 | |
| 1469 | |
| 1470 | void RangeCheckEliminator::Bound::print() { |
| 1471 | tty->print("%s", ""); |
| 1472 | if (this->_lower_instr || this->_lower != min_jint) { |
| 1473 | if (this->_lower_instr) { |
| 1474 | tty->print("i%d", this->_lower_instr->id()); |
| 1475 | if (this->_lower > 0) { |
| 1476 | tty->print("+%d", _lower); |
| 1477 | } |
| 1478 | if (this->_lower < 0) { |
| 1479 | tty->print("%d", _lower); |
| 1480 | } |
| 1481 | } else { |
| 1482 | tty->print("%d", _lower); |
| 1483 | } |
| 1484 | tty->print(" <= "); |
| 1485 | } |
| 1486 | tty->print("x"); |
| 1487 | if (this->_upper_instr || this->_upper != max_jint) { |
| 1488 | tty->print(" <= "); |
| 1489 | if (this->_upper_instr) { |
| 1490 | tty->print("i%d", this->_upper_instr->id()); |
| 1491 | if (this->_upper > 0) { |
| 1492 | tty->print("+%d", _upper); |
| 1493 | } |
| 1494 | if (this->_upper < 0) { |
| 1495 | tty->print("%d", _upper); |
| 1496 | } |
| 1497 | } else { |
| 1498 | tty->print("%d", _upper); |
| 1499 | } |
| 1500 | } |
| 1501 | } |
| 1502 | |
| 1503 | // Copy |
| 1504 | RangeCheckEliminator::Bound *RangeCheckEliminator::Bound::copy() { |
| 1505 | Bound *b = new Bound(); |
| 1506 | b->_lower = _lower; |
| 1507 | b->_lower_instr = _lower_instr; |
| 1508 | b->_upper = _upper; |
| 1509 | b->_upper_instr = _upper_instr; |
| 1510 | return b; |
| 1511 | } |
| 1512 | |
| 1513 | #ifdef ASSERT1 |
| 1514 | // Add assertion |
| 1515 | void RangeCheckEliminator::Bound::add_assertion(Instruction *instruction, Instruction *position, int i, Value instr, Instruction::Condition cond) { |
| 1516 | Instruction *result = position; |
| 1517 | Instruction *compare_with = NULL__null; |
| 1518 | ValueStack *state = position->state_before(); |
| 1519 | if (position->as_BlockEnd() && !position->as_Goto()) { |
| 1520 | state = position->as_BlockEnd()->state_before(); |
| 1521 | } |
| 1522 | Instruction *instruction_before = position->prev(); |
| 1523 | if (position->as_Return() && Compilation::current()->method()->is_synchronized() && instruction_before->as_MonitorExit()) { |
| 1524 | instruction_before = instruction_before->prev(); |
| 1525 | } |
| 1526 | result = instruction_before; |
| 1527 | // Load constant only if needed |
| 1528 | Constant *constant = NULL__null; |
| 1529 | if (i != 0 || !instr) { |
| 1530 | constant = new Constant(new IntConstant(i)); |
| 1531 | NOT_PRODUCT(constant->set_printable_bci(position->printable_bci()))constant->set_printable_bci(position->printable_bci()); |
| 1532 | result = result->insert_after(constant); |
| 1533 | compare_with = constant; |
| 1534 | } |
| 1535 | |
| 1536 | if (instr) { |
| 1537 | assert(instr->type()->as_ObjectType() || instr->type()->as_IntType(), "Type must be array or integer!")do { if (!(instr->type()->as_ObjectType() || instr-> type()->as_IntType())) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 1537, "assert(" "instr->type()->as_ObjectType() || instr->type()->as_IntType()" ") failed", "Type must be array or integer!"); ::breakpoint( ); } } while (0); |
| 1538 | compare_with = instr; |
| 1539 | // Load array length if necessary |
| 1540 | Instruction *op = instr; |
| 1541 | if (instr->type()->as_ObjectType()) { |
| 1542 | assert(state, "must not be null")do { if (!(state)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 1542, "assert(" "state" ") failed", "must not be null"); :: breakpoint(); } } while (0); |
| 1543 | ArrayLength *length = new ArrayLength(instr, state->copy()); |
| 1544 | NOT_PRODUCT(length->set_printable_bci(position->printable_bci()))length->set_printable_bci(position->printable_bci()); |
| 1545 | length->set_exception_state(length->state_before()); |
| 1546 | result = result->insert_after(length); |
| 1547 | op = length; |
| 1548 | compare_with = length; |
| 1549 | } |
| 1550 | // Add operation only if necessary |
| 1551 | if (constant) { |
| 1552 | ArithmeticOp *ao = new ArithmeticOp(Bytecodes::_iadd, constant, op, NULL__null); |
| 1553 | NOT_PRODUCT(ao->set_printable_bci(position->printable_bci()))ao->set_printable_bci(position->printable_bci()); |
| 1554 | result = result->insert_after(ao); |
| 1555 | compare_with = ao; |
| 1556 | // TODO: Check that add operation does not overflow! |
| 1557 | } |
| 1558 | } |
| 1559 | assert(compare_with != NULL, "You have to compare with something!")do { if (!(compare_with != __null)) { (*g_assert_poison) = 'X' ;; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 1559, "assert(" "compare_with != __null" ") failed", "You have to compare with something!" ); ::breakpoint(); } } while (0); |
| 1560 | assert(instruction != NULL, "Instruction must not be null!")do { if (!(instruction != __null)) { (*g_assert_poison) = 'X' ;; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 1560, "assert(" "instruction != __null" ") failed", "Instruction must not be null!" ); ::breakpoint(); } } while (0); |
| 1561 | |
| 1562 | if (instruction->type()->as_ObjectType()) { |
| 1563 | // Load array length if necessary |
| 1564 | Instruction *op = instruction; |
| 1565 | assert(state, "must not be null")do { if (!(state)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/c1/c1_RangeCheckElimination.cpp" , 1565, "assert(" "state" ") failed", "must not be null"); :: breakpoint(); } } while (0); |
| 1566 | ArrayLength *length = new ArrayLength(instruction, state->copy()); |
| 1567 | length->set_exception_state(length->state_before()); |
| 1568 | NOT_PRODUCT(length->set_printable_bci(position->printable_bci()))length->set_printable_bci(position->printable_bci()); |
| 1569 | result = result->insert_after(length); |
| 1570 | instruction = length; |
| 1571 | } |
| 1572 | |
| 1573 | Assert *assert = new Assert(instruction, cond, false, compare_with); |
| 1574 | NOT_PRODUCT(assert->set_printable_bci(position->printable_bci()))assert->set_printable_bci(position->printable_bci()); |
| 1575 | result->insert_after(assert); |
| 1576 | } |
| 1577 | |
| 1578 | // Add assertions |
| 1579 | void RangeCheckEliminator::add_assertions(Bound *bound, Instruction *instruction, Instruction *position) { |
| 1580 | // Add lower bound assertion |
| 1581 | if (bound->has_lower()) { |
| 1582 | bound->add_assertion(instruction, position, bound->lower(), bound->lower_instr(), Instruction::geq); |
| 1583 | } |
| 1584 | // Add upper bound assertion |
| 1585 | if (bound->has_upper()) { |
| 1586 | bound->add_assertion(instruction, position, bound->upper(), bound->upper_instr(), Instruction::leq); |
| 1587 | } |
| 1588 | } |
| 1589 | #endif |