Mercurial > hg > graal-jvmci-8
annotate src/share/vm/opto/connode.cpp @ 24164:f98ea2d742a2
fixed missing exception propagation (JDK-8185790)
| author | Doug Simon <doug.simon@oracle.com> |
|---|---|
| date | Tue, 08 Aug 2017 10:06:50 +0200 |
| parents | 9b69cec6d01b |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "memory/allocation.inline.hpp" | |
| 27 #include "opto/addnode.hpp" | |
| 28 #include "opto/compile.hpp" | |
| 29 #include "opto/connode.hpp" | |
| 30 #include "opto/machnode.hpp" | |
| 31 #include "opto/matcher.hpp" | |
| 32 #include "opto/memnode.hpp" | |
| 33 #include "opto/phaseX.hpp" | |
| 34 #include "opto/subnode.hpp" | |
| 35 #include "runtime/sharedRuntime.hpp" | |
| 0 | 36 |
| 1972 | 37 // Optimization - Graph Style |
| 0 | 38 |
| 39 //============================================================================= | |
| 40 //------------------------------hash------------------------------------------- | |
| 41 uint ConNode::hash() const { | |
| 42 return (uintptr_t)in(TypeFunc::Control) + _type->hash(); | |
| 43 } | |
| 44 | |
| 45 //------------------------------make------------------------------------------- | |
| 46 ConNode *ConNode::make( Compile* C, const Type *t ) { | |
| 47 switch( t->basic_type() ) { | |
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48 case T_INT: return new (C) ConINode( t->is_int() ); |
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49 case T_LONG: return new (C) ConLNode( t->is_long() ); |
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50 case T_FLOAT: return new (C) ConFNode( t->is_float_constant() ); |
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51 case T_DOUBLE: return new (C) ConDNode( t->is_double_constant() ); |
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52 case T_VOID: return new (C) ConNode ( Type::TOP ); |
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53 case T_OBJECT: return new (C) ConPNode( t->is_ptr() ); |
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54 case T_ARRAY: return new (C) ConPNode( t->is_aryptr() ); |
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55 case T_ADDRESS: return new (C) ConPNode( t->is_ptr() ); |
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56 case T_NARROWOOP: return new (C) ConNNode( t->is_narrowoop() ); |
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57 case T_NARROWKLASS: return new (C) ConNKlassNode( t->is_narrowklass() ); |
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58 case T_METADATA: return new (C) ConPNode( t->is_ptr() ); |
| 0 | 59 // Expected cases: TypePtr::NULL_PTR, any is_rawptr() |
| 60 // Also seen: AnyPtr(TopPTR *+top); from command line: | |
| 61 // r -XX:+PrintOpto -XX:CIStart=285 -XX:+CompileTheWorld -XX:CompileTheWorldStartAt=660 | |
| 62 // %%%% Stop using TypePtr::NULL_PTR to represent nulls: use either TypeRawPtr::NULL_PTR | |
| 63 // or else TypeOopPtr::NULL_PTR. Then set Type::_basic_type[AnyPtr] = T_ILLEGAL | |
| 64 } | |
| 65 ShouldNotReachHere(); | |
| 66 return NULL; | |
| 67 } | |
| 68 | |
| 69 //============================================================================= | |
| 70 /* | |
| 71 The major change is for CMoveP and StrComp. They have related but slightly | |
| 72 different problems. They both take in TWO oops which are both null-checked | |
| 73 independently before the using Node. After CCP removes the CastPP's they need | |
| 74 to pick up the guarding test edge - in this case TWO control edges. I tried | |
| 75 various solutions, all have problems: | |
| 76 | |
| 77 (1) Do nothing. This leads to a bug where we hoist a Load from a CMoveP or a | |
| 78 StrComp above a guarding null check. I've seen both cases in normal -Xcomp | |
| 79 testing. | |
| 80 | |
| 81 (2) Plug the control edge from 1 of the 2 oops in. Apparent problem here is | |
| 82 to figure out which test post-dominates. The real problem is that it doesn't | |
| 83 matter which one you pick. After you pick up, the dominating-test elider in | |
| 84 IGVN can remove the test and allow you to hoist up to the dominating test on | |
| 605 | 85 the chosen oop bypassing the test on the not-chosen oop. Seen in testing. |
| 0 | 86 Oops. |
| 87 | |
| 88 (3) Leave the CastPP's in. This makes the graph more accurate in some sense; | |
| 89 we get to keep around the knowledge that an oop is not-null after some test. | |
| 90 Alas, the CastPP's interfere with GVN (some values are the regular oop, some | |
| 91 are the CastPP of the oop, all merge at Phi's which cannot collapse, etc). | |
| 92 This cost us 10% on SpecJVM, even when I removed some of the more trivial | |
| 93 cases in the optimizer. Removing more useless Phi's started allowing Loads to | |
| 94 illegally float above null checks. I gave up on this approach. | |
| 95 | |
| 96 (4) Add BOTH control edges to both tests. Alas, too much code knows that | |
| 97 control edges are in slot-zero ONLY. Many quick asserts fail; no way to do | |
| 98 this one. Note that I really want to allow the CMoveP to float and add both | |
| 99 control edges to the dependent Load op - meaning I can select early but I | |
| 100 cannot Load until I pass both tests. | |
| 101 | |
| 102 (5) Do not hoist CMoveP and StrComp. To this end I added the v-call | |
| 103 depends_only_on_test(). No obvious performance loss on Spec, but we are | |
| 104 clearly conservative on CMoveP (also so on StrComp but that's unlikely to | |
| 105 matter ever). | |
| 106 | |
| 107 */ | |
| 108 | |
| 109 | |
| 110 //------------------------------Ideal------------------------------------------ | |
| 111 // Return a node which is more "ideal" than the current node. | |
| 112 // Move constants to the right. | |
| 113 Node *CMoveNode::Ideal(PhaseGVN *phase, bool can_reshape) { | |
| 114 if( in(0) && remove_dead_region(phase, can_reshape) ) return this; | |
| 305 | 115 // Don't bother trying to transform a dead node |
| 116 if( in(0) && in(0)->is_top() ) return NULL; | |
| 0 | 117 assert( !phase->eqv(in(Condition), this) && |
| 118 !phase->eqv(in(IfFalse), this) && | |
| 119 !phase->eqv(in(IfTrue), this), "dead loop in CMoveNode::Ideal" ); | |
| 120 if( phase->type(in(Condition)) == Type::TOP ) | |
| 121 return NULL; // return NULL when Condition is dead | |
| 122 | |
| 123 if( in(IfFalse)->is_Con() && !in(IfTrue)->is_Con() ) { | |
| 124 if( in(Condition)->is_Bool() ) { | |
| 125 BoolNode* b = in(Condition)->as_Bool(); | |
| 126 BoolNode* b2 = b->negate(phase); | |
| 127 return make( phase->C, in(Control), phase->transform(b2), in(IfTrue), in(IfFalse), _type ); | |
| 128 } | |
| 129 } | |
| 130 return NULL; | |
| 131 } | |
| 132 | |
| 133 //------------------------------is_cmove_id------------------------------------ | |
| 134 // Helper function to check for CMOVE identity. Shared with PhiNode::Identity | |
| 135 Node *CMoveNode::is_cmove_id( PhaseTransform *phase, Node *cmp, Node *t, Node *f, BoolNode *b ) { | |
| 136 // Check for Cmp'ing and CMove'ing same values | |
| 137 if( (phase->eqv(cmp->in(1),f) && | |
| 138 phase->eqv(cmp->in(2),t)) || | |
| 139 // Swapped Cmp is OK | |
| 140 (phase->eqv(cmp->in(2),f) && | |
| 141 phase->eqv(cmp->in(1),t)) ) { | |
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142 // Give up this identity check for floating points because it may choose incorrect |
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143 // value around 0.0 and -0.0 |
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144 if ( cmp->Opcode()==Op_CmpF || cmp->Opcode()==Op_CmpD ) |
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145 return NULL; |
| 0 | 146 // Check for "(t==f)?t:f;" and replace with "f" |
| 147 if( b->_test._test == BoolTest::eq ) | |
| 148 return f; | |
| 149 // Allow the inverted case as well | |
| 150 // Check for "(t!=f)?t:f;" and replace with "t" | |
| 151 if( b->_test._test == BoolTest::ne ) | |
| 152 return t; | |
| 153 } | |
| 154 return NULL; | |
| 155 } | |
| 156 | |
| 157 //------------------------------Identity--------------------------------------- | |
| 158 // Conditional-move is an identity if both inputs are the same, or the test | |
| 159 // true or false. | |
| 160 Node *CMoveNode::Identity( PhaseTransform *phase ) { | |
| 161 if( phase->eqv(in(IfFalse),in(IfTrue)) ) // C-moving identical inputs? | |
| 162 return in(IfFalse); // Then it doesn't matter | |
| 163 if( phase->type(in(Condition)) == TypeInt::ZERO ) | |
| 164 return in(IfFalse); // Always pick left(false) input | |
| 165 if( phase->type(in(Condition)) == TypeInt::ONE ) | |
| 166 return in(IfTrue); // Always pick right(true) input | |
| 167 | |
| 168 // Check for CMove'ing a constant after comparing against the constant. | |
| 169 // Happens all the time now, since if we compare equality vs a constant in | |
| 170 // the parser, we "know" the variable is constant on one path and we force | |
| 171 // it. Thus code like "if( x==0 ) {/*EMPTY*/}" ends up inserting a | |
| 172 // conditional move: "x = (x==0)?0:x;". Yucko. This fix is slightly more | |
| 173 // general in that we don't need constants. | |
| 174 if( in(Condition)->is_Bool() ) { | |
| 175 BoolNode *b = in(Condition)->as_Bool(); | |
| 176 Node *cmp = b->in(1); | |
| 177 if( cmp->is_Cmp() ) { | |
| 178 Node *id = is_cmove_id( phase, cmp, in(IfTrue), in(IfFalse), b ); | |
| 179 if( id ) return id; | |
| 180 } | |
| 181 } | |
| 182 | |
| 183 return this; | |
| 184 } | |
| 185 | |
| 186 //------------------------------Value------------------------------------------ | |
| 187 // Result is the meet of inputs | |
| 188 const Type *CMoveNode::Value( PhaseTransform *phase ) const { | |
| 189 if( phase->type(in(Condition)) == Type::TOP ) | |
| 190 return Type::TOP; | |
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191 return phase->type(in(IfFalse))->meet_speculative(phase->type(in(IfTrue))); |
| 0 | 192 } |
| 193 | |
| 194 //------------------------------make------------------------------------------- | |
| 195 // Make a correctly-flavored CMove. Since _type is directly determined | |
| 196 // from the inputs we do not need to specify it here. | |
| 197 CMoveNode *CMoveNode::make( Compile *C, Node *c, Node *bol, Node *left, Node *right, const Type *t ) { | |
| 198 switch( t->basic_type() ) { | |
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199 case T_INT: return new (C) CMoveINode( bol, left, right, t->is_int() ); |
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200 case T_FLOAT: return new (C) CMoveFNode( bol, left, right, t ); |
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201 case T_DOUBLE: return new (C) CMoveDNode( bol, left, right, t ); |
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202 case T_LONG: return new (C) CMoveLNode( bol, left, right, t->is_long() ); |
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203 case T_OBJECT: return new (C) CMovePNode( c, bol, left, right, t->is_oopptr() ); |
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204 case T_ADDRESS: return new (C) CMovePNode( c, bol, left, right, t->is_ptr() ); |
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205 case T_NARROWOOP: return new (C) CMoveNNode( c, bol, left, right, t ); |
| 0 | 206 default: |
| 207 ShouldNotReachHere(); | |
| 208 return NULL; | |
| 209 } | |
| 210 } | |
| 211 | |
| 212 //============================================================================= | |
| 213 //------------------------------Ideal------------------------------------------ | |
| 214 // Return a node which is more "ideal" than the current node. | |
| 215 // Check for conversions to boolean | |
| 216 Node *CMoveINode::Ideal(PhaseGVN *phase, bool can_reshape) { | |
| 217 // Try generic ideal's first | |
| 218 Node *x = CMoveNode::Ideal(phase, can_reshape); | |
| 219 if( x ) return x; | |
| 220 | |
| 221 // If zero is on the left (false-case, no-move-case) it must mean another | |
| 222 // constant is on the right (otherwise the shared CMove::Ideal code would | |
| 223 // have moved the constant to the right). This situation is bad for Intel | |
| 224 // and a don't-care for Sparc. It's bad for Intel because the zero has to | |
| 225 // be manifested in a register with a XOR which kills flags, which are live | |
| 226 // on input to the CMoveI, leading to a situation which causes excessive | |
| 227 // spilling on Intel. For Sparc, if the zero in on the left the Sparc will | |
| 228 // zero a register via G0 and conditionally-move the other constant. If the | |
| 229 // zero is on the right, the Sparc will load the first constant with a | |
| 230 // 13-bit set-lo and conditionally move G0. See bug 4677505. | |
| 231 if( phase->type(in(IfFalse)) == TypeInt::ZERO && !(phase->type(in(IfTrue)) == TypeInt::ZERO) ) { | |
| 232 if( in(Condition)->is_Bool() ) { | |
| 233 BoolNode* b = in(Condition)->as_Bool(); | |
| 234 BoolNode* b2 = b->negate(phase); | |
| 235 return make( phase->C, in(Control), phase->transform(b2), in(IfTrue), in(IfFalse), _type ); | |
| 236 } | |
| 237 } | |
| 238 | |
| 239 // Now check for booleans | |
| 240 int flip = 0; | |
| 241 | |
| 242 // Check for picking from zero/one | |
| 243 if( phase->type(in(IfFalse)) == TypeInt::ZERO && phase->type(in(IfTrue)) == TypeInt::ONE ) { | |
| 244 flip = 1 - flip; | |
| 245 } else if( phase->type(in(IfFalse)) == TypeInt::ONE && phase->type(in(IfTrue)) == TypeInt::ZERO ) { | |
| 246 } else return NULL; | |
| 247 | |
| 248 // Check for eq/ne test | |
| 249 if( !in(1)->is_Bool() ) return NULL; | |
| 250 BoolNode *bol = in(1)->as_Bool(); | |
| 251 if( bol->_test._test == BoolTest::eq ) { | |
| 252 } else if( bol->_test._test == BoolTest::ne ) { | |
| 253 flip = 1-flip; | |
| 254 } else return NULL; | |
| 255 | |
| 256 // Check for vs 0 or 1 | |
| 257 if( !bol->in(1)->is_Cmp() ) return NULL; | |
| 258 const CmpNode *cmp = bol->in(1)->as_Cmp(); | |
| 259 if( phase->type(cmp->in(2)) == TypeInt::ZERO ) { | |
| 260 } else if( phase->type(cmp->in(2)) == TypeInt::ONE ) { | |
| 261 // Allow cmp-vs-1 if the other input is bounded by 0-1 | |
| 262 if( phase->type(cmp->in(1)) != TypeInt::BOOL ) | |
| 263 return NULL; | |
| 264 flip = 1 - flip; | |
| 265 } else return NULL; | |
| 266 | |
| 267 // Convert to a bool (flipped) | |
| 268 // Build int->bool conversion | |
| 269 #ifndef PRODUCT | |
| 270 if( PrintOpto ) tty->print_cr("CMOV to I2B"); | |
| 271 #endif | |
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272 Node *n = new (phase->C) Conv2BNode( cmp->in(1) ); |
| 0 | 273 if( flip ) |
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274 n = new (phase->C) XorINode( phase->transform(n), phase->intcon(1) ); |
| 0 | 275 |
| 276 return n; | |
| 277 } | |
| 278 | |
| 279 //============================================================================= | |
| 280 //------------------------------Ideal------------------------------------------ | |
| 281 // Return a node which is more "ideal" than the current node. | |
| 282 // Check for absolute value | |
| 283 Node *CMoveFNode::Ideal(PhaseGVN *phase, bool can_reshape) { | |
| 284 // Try generic ideal's first | |
| 285 Node *x = CMoveNode::Ideal(phase, can_reshape); | |
| 286 if( x ) return x; | |
| 287 | |
| 288 int cmp_zero_idx = 0; // Index of compare input where to look for zero | |
| 289 int phi_x_idx = 0; // Index of phi input where to find naked x | |
| 290 | |
| 291 // Find the Bool | |
| 292 if( !in(1)->is_Bool() ) return NULL; | |
| 293 BoolNode *bol = in(1)->as_Bool(); | |
| 294 // Check bool sense | |
| 295 switch( bol->_test._test ) { | |
| 296 case BoolTest::lt: cmp_zero_idx = 1; phi_x_idx = IfTrue; break; | |
| 297 case BoolTest::le: cmp_zero_idx = 2; phi_x_idx = IfFalse; break; | |
| 298 case BoolTest::gt: cmp_zero_idx = 2; phi_x_idx = IfTrue; break; | |
| 299 case BoolTest::ge: cmp_zero_idx = 1; phi_x_idx = IfFalse; break; | |
| 300 default: return NULL; break; | |
| 301 } | |
| 302 | |
| 303 // Find zero input of CmpF; the other input is being abs'd | |
| 304 Node *cmpf = bol->in(1); | |
| 305 if( cmpf->Opcode() != Op_CmpF ) return NULL; | |
| 306 Node *X = NULL; | |
| 307 bool flip = false; | |
| 308 if( phase->type(cmpf->in(cmp_zero_idx)) == TypeF::ZERO ) { | |
| 309 X = cmpf->in(3 - cmp_zero_idx); | |
| 310 } else if (phase->type(cmpf->in(3 - cmp_zero_idx)) == TypeF::ZERO) { | |
| 311 // The test is inverted, we should invert the result... | |
| 312 X = cmpf->in(cmp_zero_idx); | |
| 313 flip = true; | |
| 314 } else { | |
| 315 return NULL; | |
| 316 } | |
| 317 | |
| 318 // If X is found on the appropriate phi input, find the subtract on the other | |
| 319 if( X != in(phi_x_idx) ) return NULL; | |
| 320 int phi_sub_idx = phi_x_idx == IfTrue ? IfFalse : IfTrue; | |
| 321 Node *sub = in(phi_sub_idx); | |
| 322 | |
| 323 // Allow only SubF(0,X) and fail out for all others; NegF is not OK | |
| 324 if( sub->Opcode() != Op_SubF || | |
| 325 sub->in(2) != X || | |
| 326 phase->type(sub->in(1)) != TypeF::ZERO ) return NULL; | |
| 327 | |
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328 Node *abs = new (phase->C) AbsFNode( X ); |
| 0 | 329 if( flip ) |
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330 abs = new (phase->C) SubFNode(sub->in(1), phase->transform(abs)); |
| 0 | 331 |
| 332 return abs; | |
| 333 } | |
| 334 | |
| 335 //============================================================================= | |
| 336 //------------------------------Ideal------------------------------------------ | |
| 337 // Return a node which is more "ideal" than the current node. | |
| 338 // Check for absolute value | |
| 339 Node *CMoveDNode::Ideal(PhaseGVN *phase, bool can_reshape) { | |
| 340 // Try generic ideal's first | |
| 341 Node *x = CMoveNode::Ideal(phase, can_reshape); | |
| 342 if( x ) return x; | |
| 343 | |
| 344 int cmp_zero_idx = 0; // Index of compare input where to look for zero | |
| 345 int phi_x_idx = 0; // Index of phi input where to find naked x | |
| 346 | |
| 347 // Find the Bool | |
| 348 if( !in(1)->is_Bool() ) return NULL; | |
| 349 BoolNode *bol = in(1)->as_Bool(); | |
| 350 // Check bool sense | |
| 351 switch( bol->_test._test ) { | |
| 352 case BoolTest::lt: cmp_zero_idx = 1; phi_x_idx = IfTrue; break; | |
| 353 case BoolTest::le: cmp_zero_idx = 2; phi_x_idx = IfFalse; break; | |
| 354 case BoolTest::gt: cmp_zero_idx = 2; phi_x_idx = IfTrue; break; | |
| 355 case BoolTest::ge: cmp_zero_idx = 1; phi_x_idx = IfFalse; break; | |
| 356 default: return NULL; break; | |
| 357 } | |
| 358 | |
| 359 // Find zero input of CmpD; the other input is being abs'd | |
| 360 Node *cmpd = bol->in(1); | |
| 361 if( cmpd->Opcode() != Op_CmpD ) return NULL; | |
| 362 Node *X = NULL; | |
| 363 bool flip = false; | |
| 364 if( phase->type(cmpd->in(cmp_zero_idx)) == TypeD::ZERO ) { | |
| 365 X = cmpd->in(3 - cmp_zero_idx); | |
| 366 } else if (phase->type(cmpd->in(3 - cmp_zero_idx)) == TypeD::ZERO) { | |
| 367 // The test is inverted, we should invert the result... | |
| 368 X = cmpd->in(cmp_zero_idx); | |
| 369 flip = true; | |
| 370 } else { | |
| 371 return NULL; | |
| 372 } | |
| 373 | |
| 374 // If X is found on the appropriate phi input, find the subtract on the other | |
| 375 if( X != in(phi_x_idx) ) return NULL; | |
| 376 int phi_sub_idx = phi_x_idx == IfTrue ? IfFalse : IfTrue; | |
| 377 Node *sub = in(phi_sub_idx); | |
| 378 | |
| 379 // Allow only SubD(0,X) and fail out for all others; NegD is not OK | |
| 380 if( sub->Opcode() != Op_SubD || | |
| 381 sub->in(2) != X || | |
| 382 phase->type(sub->in(1)) != TypeD::ZERO ) return NULL; | |
| 383 | |
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384 Node *abs = new (phase->C) AbsDNode( X ); |
| 0 | 385 if( flip ) |
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386 abs = new (phase->C) SubDNode(sub->in(1), phase->transform(abs)); |
| 0 | 387 |
| 388 return abs; | |
| 389 } | |
| 390 | |
| 391 | |
| 392 //============================================================================= | |
| 393 // If input is already higher or equal to cast type, then this is an identity. | |
| 394 Node *ConstraintCastNode::Identity( PhaseTransform *phase ) { | |
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395 return phase->type(in(1))->higher_equal_speculative(_type) ? in(1) : this; |
| 0 | 396 } |
| 397 | |
| 398 //------------------------------Value------------------------------------------ | |
| 399 // Take 'join' of input and cast-up type | |
| 400 const Type *ConstraintCastNode::Value( PhaseTransform *phase ) const { | |
| 401 if( in(0) && phase->type(in(0)) == Type::TOP ) return Type::TOP; | |
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402 const Type* ft = phase->type(in(1))->filter_speculative(_type); |
| 0 | 403 |
| 404 #ifdef ASSERT | |
| 405 // Previous versions of this function had some special case logic, | |
| 406 // which is no longer necessary. Make sure of the required effects. | |
| 407 switch (Opcode()) { | |
| 408 case Op_CastII: | |
| 409 { | |
| 410 const Type* t1 = phase->type(in(1)); | |
| 411 if( t1 == Type::TOP ) assert(ft == Type::TOP, "special case #1"); | |
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412 const Type* rt = t1->join_speculative(_type); |
| 0 | 413 if (rt->empty()) assert(ft == Type::TOP, "special case #2"); |
| 414 break; | |
| 415 } | |
| 416 case Op_CastPP: | |
| 417 if (phase->type(in(1)) == TypePtr::NULL_PTR && | |
| 418 _type->isa_ptr() && _type->is_ptr()->_ptr == TypePtr::NotNull) | |
| 419 assert(ft == Type::TOP, "special case #3"); | |
| 420 break; | |
| 421 } | |
| 422 #endif //ASSERT | |
| 423 | |
| 424 return ft; | |
| 425 } | |
| 426 | |
| 427 //------------------------------Ideal------------------------------------------ | |
| 428 // Return a node which is more "ideal" than the current node. Strip out | |
| 429 // control copies | |
| 430 Node *ConstraintCastNode::Ideal(PhaseGVN *phase, bool can_reshape){ | |
| 431 return (in(0) && remove_dead_region(phase, can_reshape)) ? this : NULL; | |
| 432 } | |
| 433 | |
| 434 //------------------------------Ideal_DU_postCCP------------------------------- | |
| 435 // Throw away cast after constant propagation | |
| 436 Node *ConstraintCastNode::Ideal_DU_postCCP( PhaseCCP *ccp ) { | |
| 437 const Type *t = ccp->type(in(1)); | |
| 438 ccp->hash_delete(this); | |
| 439 set_type(t); // Turn into ID function | |
| 440 ccp->hash_insert(this); | |
| 441 return this; | |
| 442 } | |
| 443 | |
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444 uint CastIINode::size_of() const { |
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445 return sizeof(*this); |
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446 } |
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447 |
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448 uint CastIINode::cmp(const Node &n) const { |
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449 return TypeNode::cmp(n) && |
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450 ((CastIINode&)n)._carry_dependency == _carry_dependency && |
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451 ((CastIINode&)n)._range_check_dependency == _range_check_dependency; |
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452 } |
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453 |
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454 Node *CastIINode::Identity(PhaseTransform *phase) { |
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455 if (_carry_dependency) { |
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456 return this; |
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457 } |
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458 return ConstraintCastNode::Identity(phase); |
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459 } |
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460 |
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461 const Type *CastIINode::Value(PhaseTransform *phase) const { |
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462 const Type *res = ConstraintCastNode::Value(phase); |
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463 |
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464 // Try to improve the type of the CastII if we recognize a CmpI/If |
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465 // pattern. |
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466 if (_carry_dependency) { |
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467 if (in(0) != NULL && in(0)->in(0) != NULL && in(0)->in(0)->is_If()) { |
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468 assert(in(0)->is_IfFalse() || in(0)->is_IfTrue(), "should be If proj"); |
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469 Node* proj = in(0); |
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470 if (proj->in(0)->in(1)->is_Bool()) { |
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471 Node* b = proj->in(0)->in(1); |
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472 if (b->in(1)->Opcode() == Op_CmpI) { |
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473 Node* cmp = b->in(1); |
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474 if (cmp->in(1) == in(1) && phase->type(cmp->in(2))->isa_int()) { |
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475 const TypeInt* in2_t = phase->type(cmp->in(2))->is_int(); |
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476 const Type* t = TypeInt::INT; |
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477 BoolTest test = b->as_Bool()->_test; |
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478 if (proj->is_IfFalse()) { |
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479 test = test.negate(); |
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480 } |
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481 BoolTest::mask m = test._test; |
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482 jlong lo_long = min_jint; |
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483 jlong hi_long = max_jint; |
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484 if (m == BoolTest::le || m == BoolTest::lt) { |
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485 hi_long = in2_t->_hi; |
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486 if (m == BoolTest::lt) { |
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487 hi_long -= 1; |
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488 } |
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489 } else if (m == BoolTest::ge || m == BoolTest::gt) { |
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490 lo_long = in2_t->_lo; |
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491 if (m == BoolTest::gt) { |
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492 lo_long += 1; |
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493 } |
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494 } else if (m == BoolTest::eq) { |
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495 lo_long = in2_t->_lo; |
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496 hi_long = in2_t->_hi; |
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497 } else if (m == BoolTest::ne) { |
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498 // can't do any better |
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499 } else { |
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500 stringStream ss; |
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501 test.dump_on(&ss); |
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502 fatal(err_msg_res("unexpected comparison %s", ss.as_string())); |
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503 } |
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504 int lo_int = (int)lo_long; |
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505 int hi_int = (int)hi_long; |
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506 |
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507 if (lo_long != (jlong)lo_int) { |
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508 lo_int = min_jint; |
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509 } |
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510 if (hi_long != (jlong)hi_int) { |
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511 hi_int = max_jint; |
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512 } |
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513 |
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514 t = TypeInt::make(lo_int, hi_int, Type::WidenMax); |
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515 |
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516 res = res->filter_speculative(t); |
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517 |
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518 return res; |
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519 } |
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520 } |
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521 } |
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522 } |
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523 } |
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524 return res; |
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525 } |
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526 |
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527 Node *CastIINode::Ideal_DU_postCCP(PhaseCCP *ccp) { |
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528 if (_carry_dependency || _range_check_dependency) { |
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529 return NULL; |
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530 } |
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531 return ConstraintCastNode::Ideal_DU_postCCP(ccp); |
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532 } |
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533 |
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534 #ifndef PRODUCT |
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535 void CastIINode::dump_spec(outputStream *st) const { |
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536 TypeNode::dump_spec(st); |
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537 if (_carry_dependency) { |
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538 st->print(" carry dependency"); |
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539 } |
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540 if (_range_check_dependency) { |
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541 st->print(" range check dependency"); |
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542 } |
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543 } |
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544 #endif |
| 0 | 545 |
| 546 //============================================================================= | |
| 547 | |
| 548 //------------------------------Ideal_DU_postCCP------------------------------- | |
| 549 // If not converting int->oop, throw away cast after constant propagation | |
| 550 Node *CastPPNode::Ideal_DU_postCCP( PhaseCCP *ccp ) { | |
| 551 const Type *t = ccp->type(in(1)); | |
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552 if (!t->isa_oop_ptr() || ((in(1)->is_DecodeN()) && Matcher::gen_narrow_oop_implicit_null_checks())) { |
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553 return NULL; // do not transform raw pointers or narrow oops |
| 0 | 554 } |
| 555 return ConstraintCastNode::Ideal_DU_postCCP(ccp); | |
| 556 } | |
| 557 | |
| 558 | |
| 559 | |
| 560 //============================================================================= | |
| 561 //------------------------------Identity--------------------------------------- | |
| 562 // If input is already higher or equal to cast type, then this is an identity. | |
| 563 Node *CheckCastPPNode::Identity( PhaseTransform *phase ) { | |
| 564 // Toned down to rescue meeting at a Phi 3 different oops all implementing | |
| 565 // the same interface. CompileTheWorld starting at 502, kd12rc1.zip. | |
| 566 return (phase->type(in(1)) == phase->type(this)) ? in(1) : this; | |
| 567 } | |
| 568 | |
| 569 //------------------------------Value------------------------------------------ | |
| 570 // Take 'join' of input and cast-up type, unless working with an Interface | |
| 571 const Type *CheckCastPPNode::Value( PhaseTransform *phase ) const { | |
| 572 if( in(0) && phase->type(in(0)) == Type::TOP ) return Type::TOP; | |
| 573 | |
| 574 const Type *inn = phase->type(in(1)); | |
| 575 if( inn == Type::TOP ) return Type::TOP; // No information yet | |
| 576 | |
| 577 const TypePtr *in_type = inn->isa_ptr(); | |
| 578 const TypePtr *my_type = _type->isa_ptr(); | |
| 579 const Type *result = _type; | |
| 580 if( in_type != NULL && my_type != NULL ) { | |
| 581 TypePtr::PTR in_ptr = in_type->ptr(); | |
| 582 if( in_ptr == TypePtr::Null ) { | |
| 583 result = in_type; | |
| 584 } else if( in_ptr == TypePtr::Constant ) { | |
| 585 // Casting a constant oop to an interface? | |
| 586 // (i.e., a String to a Comparable?) | |
| 587 // Then return the interface. | |
| 588 const TypeOopPtr *jptr = my_type->isa_oopptr(); | |
| 589 assert( jptr, "" ); | |
| 590 result = (jptr->klass()->is_interface() || !in_type->higher_equal(_type)) | |
| 591 ? my_type->cast_to_ptr_type( TypePtr::NotNull ) | |
| 592 : in_type; | |
| 593 } else { | |
| 594 result = my_type->cast_to_ptr_type( my_type->join_ptr(in_ptr) ); | |
| 595 } | |
| 596 } | |
| 597 return result; | |
| 598 | |
| 599 // JOIN NOT DONE HERE BECAUSE OF INTERFACE ISSUES. | |
| 600 // FIX THIS (DO THE JOIN) WHEN UNION TYPES APPEAR! | |
| 601 | |
| 602 // | |
| 603 // Remove this code after overnight run indicates no performance | |
| 604 // loss from not performing JOIN at CheckCastPPNode | |
| 605 // | |
| 606 // const TypeInstPtr *in_oop = in->isa_instptr(); | |
| 607 // const TypeInstPtr *my_oop = _type->isa_instptr(); | |
| 608 // // If either input is an 'interface', return destination type | |
| 609 // assert (in_oop == NULL || in_oop->klass() != NULL, ""); | |
| 610 // assert (my_oop == NULL || my_oop->klass() != NULL, ""); | |
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611 // if( (in_oop && in_oop->klass()->is_interface()) |
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612 // ||(my_oop && my_oop->klass()->is_interface()) ) { |
| 0 | 613 // TypePtr::PTR in_ptr = in->isa_ptr() ? in->is_ptr()->_ptr : TypePtr::BotPTR; |
| 614 // // Preserve cast away nullness for interfaces | |
| 615 // if( in_ptr == TypePtr::NotNull && my_oop && my_oop->_ptr == TypePtr::BotPTR ) { | |
| 616 // return my_oop->cast_to_ptr_type(TypePtr::NotNull); | |
| 617 // } | |
| 618 // return _type; | |
| 619 // } | |
| 620 // | |
| 621 // // Neither the input nor the destination type is an interface, | |
| 622 // | |
| 623 // // history: JOIN used to cause weird corner case bugs | |
| 624 // // return (in == TypeOopPtr::NULL_PTR) ? in : _type; | |
| 625 // // JOIN picks up NotNull in common instance-of/check-cast idioms, both oops. | |
| 626 // // JOIN does not preserve NotNull in other cases, e.g. RawPtr vs InstPtr | |
| 627 // const Type *join = in->join(_type); | |
| 628 // // Check if join preserved NotNull'ness for pointers | |
| 629 // if( join->isa_ptr() && _type->isa_ptr() ) { | |
| 630 // TypePtr::PTR join_ptr = join->is_ptr()->_ptr; | |
| 631 // TypePtr::PTR type_ptr = _type->is_ptr()->_ptr; | |
| 632 // // If there isn't any NotNull'ness to preserve | |
| 633 // // OR if join preserved NotNull'ness then return it | |
| 634 // if( type_ptr == TypePtr::BotPTR || type_ptr == TypePtr::Null || | |
| 635 // join_ptr == TypePtr::NotNull || join_ptr == TypePtr::Constant ) { | |
| 636 // return join; | |
| 637 // } | |
| 638 // // ELSE return same old type as before | |
| 639 // return _type; | |
| 640 // } | |
| 641 // // Not joining two pointers | |
| 642 // return join; | |
| 643 } | |
| 644 | |
| 645 //------------------------------Ideal------------------------------------------ | |
| 646 // Return a node which is more "ideal" than the current node. Strip out | |
| 647 // control copies | |
| 648 Node *CheckCastPPNode::Ideal(PhaseGVN *phase, bool can_reshape){ | |
| 649 return (in(0) && remove_dead_region(phase, can_reshape)) ? this : NULL; | |
| 650 } | |
| 651 | |
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652 |
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653 Node* DecodeNNode::Identity(PhaseTransform* phase) { |
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654 const Type *t = phase->type( in(1) ); |
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655 if( t == Type::TOP ) return in(1); |
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656 |
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657 if (in(1)->is_EncodeP()) { |
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658 // (DecodeN (EncodeP p)) -> p |
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659 return in(1)->in(1); |
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660 } |
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661 return this; |
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662 } |
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663 |
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664 const Type *DecodeNNode::Value( PhaseTransform *phase ) const { |
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665 const Type *t = phase->type( in(1) ); |
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666 if (t == Type::TOP) return Type::TOP; |
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667 if (t == TypeNarrowOop::NULL_PTR) return TypePtr::NULL_PTR; |
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668 |
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669 assert(t->isa_narrowoop(), "only narrowoop here"); |
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670 return t->make_ptr(); |
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671 } |
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672 |
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673 Node* EncodePNode::Identity(PhaseTransform* phase) { |
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674 const Type *t = phase->type( in(1) ); |
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675 if( t == Type::TOP ) return in(1); |
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676 |
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677 if (in(1)->is_DecodeN()) { |
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678 // (EncodeP (DecodeN p)) -> p |
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679 return in(1)->in(1); |
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680 } |
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681 return this; |
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682 } |
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683 |
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684 const Type *EncodePNode::Value( PhaseTransform *phase ) const { |
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685 const Type *t = phase->type( in(1) ); |
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686 if (t == Type::TOP) return Type::TOP; |
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687 if (t == TypePtr::NULL_PTR) return TypeNarrowOop::NULL_PTR; |
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688 |
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689 assert(t->isa_oop_ptr(), "only oopptr here"); |
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690 return t->make_narrowoop(); |
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691 } |
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692 |
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693 |
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694 Node *EncodeNarrowPtrNode::Ideal_DU_postCCP( PhaseCCP *ccp ) { |
| 163 | 695 return MemNode::Ideal_common_DU_postCCP(ccp, this, in(1)); |
| 696 } | |
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697 |
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698 Node* DecodeNKlassNode::Identity(PhaseTransform* phase) { |
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699 const Type *t = phase->type( in(1) ); |
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700 if( t == Type::TOP ) return in(1); |
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701 |
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702 if (in(1)->is_EncodePKlass()) { |
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703 // (DecodeNKlass (EncodePKlass p)) -> p |
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704 return in(1)->in(1); |
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705 } |
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706 return this; |
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707 } |
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708 |
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709 const Type *DecodeNKlassNode::Value( PhaseTransform *phase ) const { |
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710 const Type *t = phase->type( in(1) ); |
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711 if (t == Type::TOP) return Type::TOP; |
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712 assert(t != TypeNarrowKlass::NULL_PTR, "null klass?"); |
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713 |
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714 assert(t->isa_narrowklass(), "only narrow klass ptr here"); |
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715 return t->make_ptr(); |
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716 } |
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717 |
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718 Node* EncodePKlassNode::Identity(PhaseTransform* phase) { |
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719 const Type *t = phase->type( in(1) ); |
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720 if( t == Type::TOP ) return in(1); |
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721 |
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722 if (in(1)->is_DecodeNKlass()) { |
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723 // (EncodePKlass (DecodeNKlass p)) -> p |
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724 return in(1)->in(1); |
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725 } |
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726 return this; |
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727 } |
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728 |
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729 const Type *EncodePKlassNode::Value( PhaseTransform *phase ) const { |
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730 const Type *t = phase->type( in(1) ); |
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731 if (t == Type::TOP) return Type::TOP; |
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732 assert (t != TypePtr::NULL_PTR, "null klass?"); |
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733 |
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734 assert(UseCompressedClassPointers && t->isa_klassptr(), "only klass ptr here"); |
|
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735 return t->make_narrowklass(); |
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736 } |
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737 |
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738 |
| 0 | 739 //============================================================================= |
| 740 //------------------------------Identity--------------------------------------- | |
| 741 Node *Conv2BNode::Identity( PhaseTransform *phase ) { | |
| 742 const Type *t = phase->type( in(1) ); | |
| 743 if( t == Type::TOP ) return in(1); | |
| 744 if( t == TypeInt::ZERO ) return in(1); | |
| 745 if( t == TypeInt::ONE ) return in(1); | |
| 746 if( t == TypeInt::BOOL ) return in(1); | |
| 747 return this; | |
| 748 } | |
| 749 | |
| 750 //------------------------------Value------------------------------------------ | |
| 751 const Type *Conv2BNode::Value( PhaseTransform *phase ) const { | |
| 752 const Type *t = phase->type( in(1) ); | |
| 753 if( t == Type::TOP ) return Type::TOP; | |
| 754 if( t == TypeInt::ZERO ) return TypeInt::ZERO; | |
| 755 if( t == TypePtr::NULL_PTR ) return TypeInt::ZERO; | |
| 756 const TypePtr *tp = t->isa_ptr(); | |
| 757 if( tp != NULL ) { | |
| 758 if( tp->ptr() == TypePtr::AnyNull ) return Type::TOP; | |
| 759 if( tp->ptr() == TypePtr::Constant) return TypeInt::ONE; | |
| 760 if (tp->ptr() == TypePtr::NotNull) return TypeInt::ONE; | |
| 761 return TypeInt::BOOL; | |
| 762 } | |
| 763 if (t->base() != Type::Int) return TypeInt::BOOL; | |
| 764 const TypeInt *ti = t->is_int(); | |
| 765 if( ti->_hi < 0 || ti->_lo > 0 ) return TypeInt::ONE; | |
| 766 return TypeInt::BOOL; | |
| 767 } | |
| 768 | |
| 769 | |
| 770 // The conversions operations are all Alpha sorted. Please keep it that way! | |
| 771 //============================================================================= | |
| 772 //------------------------------Value------------------------------------------ | |
| 773 const Type *ConvD2FNode::Value( PhaseTransform *phase ) const { | |
| 774 const Type *t = phase->type( in(1) ); | |
| 775 if( t == Type::TOP ) return Type::TOP; | |
| 776 if( t == Type::DOUBLE ) return Type::FLOAT; | |
| 777 const TypeD *td = t->is_double_constant(); | |
| 778 return TypeF::make( (float)td->getd() ); | |
| 779 } | |
| 780 | |
| 781 //------------------------------Identity--------------------------------------- | |
| 782 // Float's can be converted to doubles with no loss of bits. Hence | |
| 783 // converting a float to a double and back to a float is a NOP. | |
| 784 Node *ConvD2FNode::Identity(PhaseTransform *phase) { | |
| 785 return (in(1)->Opcode() == Op_ConvF2D) ? in(1)->in(1) : this; | |
| 786 } | |
| 787 | |
| 788 //============================================================================= | |
| 789 //------------------------------Value------------------------------------------ | |
| 790 const Type *ConvD2INode::Value( PhaseTransform *phase ) const { | |
| 791 const Type *t = phase->type( in(1) ); | |
| 792 if( t == Type::TOP ) return Type::TOP; | |
| 793 if( t == Type::DOUBLE ) return TypeInt::INT; | |
| 794 const TypeD *td = t->is_double_constant(); | |
| 795 return TypeInt::make( SharedRuntime::d2i( td->getd() ) ); | |
| 796 } | |
| 797 | |
| 798 //------------------------------Ideal------------------------------------------ | |
| 799 // If converting to an int type, skip any rounding nodes | |
| 800 Node *ConvD2INode::Ideal(PhaseGVN *phase, bool can_reshape) { | |
| 801 if( in(1)->Opcode() == Op_RoundDouble ) | |
| 802 set_req(1,in(1)->in(1)); | |
| 803 return NULL; | |
| 804 } | |
| 805 | |
| 806 //------------------------------Identity--------------------------------------- | |
| 807 // Int's can be converted to doubles with no loss of bits. Hence | |
| 808 // converting an integer to a double and back to an integer is a NOP. | |
| 809 Node *ConvD2INode::Identity(PhaseTransform *phase) { | |
| 810 return (in(1)->Opcode() == Op_ConvI2D) ? in(1)->in(1) : this; | |
| 811 } | |
| 812 | |
| 813 //============================================================================= | |
| 814 //------------------------------Value------------------------------------------ | |
| 815 const Type *ConvD2LNode::Value( PhaseTransform *phase ) const { | |
| 816 const Type *t = phase->type( in(1) ); | |
| 817 if( t == Type::TOP ) return Type::TOP; | |
| 818 if( t == Type::DOUBLE ) return TypeLong::LONG; | |
| 819 const TypeD *td = t->is_double_constant(); | |
| 820 return TypeLong::make( SharedRuntime::d2l( td->getd() ) ); | |
| 821 } | |
| 822 | |
| 823 //------------------------------Identity--------------------------------------- | |
| 824 Node *ConvD2LNode::Identity(PhaseTransform *phase) { | |
| 825 // Remove ConvD2L->ConvL2D->ConvD2L sequences. | |
| 826 if( in(1) ->Opcode() == Op_ConvL2D && | |
| 827 in(1)->in(1)->Opcode() == Op_ConvD2L ) | |
| 828 return in(1)->in(1); | |
| 829 return this; | |
| 830 } | |
| 831 | |
| 832 //------------------------------Ideal------------------------------------------ | |
| 833 // If converting to an int type, skip any rounding nodes | |
| 834 Node *ConvD2LNode::Ideal(PhaseGVN *phase, bool can_reshape) { | |
| 835 if( in(1)->Opcode() == Op_RoundDouble ) | |
| 836 set_req(1,in(1)->in(1)); | |
| 837 return NULL; | |
| 838 } | |
| 839 | |
| 840 //============================================================================= | |
| 841 //------------------------------Value------------------------------------------ | |
| 842 const Type *ConvF2DNode::Value( PhaseTransform *phase ) const { | |
| 843 const Type *t = phase->type( in(1) ); | |
| 844 if( t == Type::TOP ) return Type::TOP; | |
| 845 if( t == Type::FLOAT ) return Type::DOUBLE; | |
| 846 const TypeF *tf = t->is_float_constant(); | |
| 847 return TypeD::make( (double)tf->getf() ); | |
| 848 } | |
| 849 | |
| 850 //============================================================================= | |
| 851 //------------------------------Value------------------------------------------ | |
| 852 const Type *ConvF2INode::Value( PhaseTransform *phase ) const { | |
| 853 const Type *t = phase->type( in(1) ); | |
| 854 if( t == Type::TOP ) return Type::TOP; | |
| 855 if( t == Type::FLOAT ) return TypeInt::INT; | |
| 856 const TypeF *tf = t->is_float_constant(); | |
| 857 return TypeInt::make( SharedRuntime::f2i( tf->getf() ) ); | |
| 858 } | |
| 859 | |
| 860 //------------------------------Identity--------------------------------------- | |
| 861 Node *ConvF2INode::Identity(PhaseTransform *phase) { | |
| 862 // Remove ConvF2I->ConvI2F->ConvF2I sequences. | |
| 863 if( in(1) ->Opcode() == Op_ConvI2F && | |
| 864 in(1)->in(1)->Opcode() == Op_ConvF2I ) | |
| 865 return in(1)->in(1); | |
| 866 return this; | |
| 867 } | |
| 868 | |
| 869 //------------------------------Ideal------------------------------------------ | |
| 870 // If converting to an int type, skip any rounding nodes | |
| 871 Node *ConvF2INode::Ideal(PhaseGVN *phase, bool can_reshape) { | |
| 872 if( in(1)->Opcode() == Op_RoundFloat ) | |
| 873 set_req(1,in(1)->in(1)); | |
| 874 return NULL; | |
| 875 } | |
| 876 | |
| 877 //============================================================================= | |
| 878 //------------------------------Value------------------------------------------ | |
| 879 const Type *ConvF2LNode::Value( PhaseTransform *phase ) const { | |
| 880 const Type *t = phase->type( in(1) ); | |
| 881 if( t == Type::TOP ) return Type::TOP; | |
| 882 if( t == Type::FLOAT ) return TypeLong::LONG; | |
| 883 const TypeF *tf = t->is_float_constant(); | |
| 884 return TypeLong::make( SharedRuntime::f2l( tf->getf() ) ); | |
| 885 } | |
| 886 | |
| 887 //------------------------------Identity--------------------------------------- | |
| 888 Node *ConvF2LNode::Identity(PhaseTransform *phase) { | |
| 889 // Remove ConvF2L->ConvL2F->ConvF2L sequences. | |
| 890 if( in(1) ->Opcode() == Op_ConvL2F && | |
| 891 in(1)->in(1)->Opcode() == Op_ConvF2L ) | |
| 892 return in(1)->in(1); | |
| 893 return this; | |
| 894 } | |
| 895 | |
| 896 //------------------------------Ideal------------------------------------------ | |
| 897 // If converting to an int type, skip any rounding nodes | |
| 898 Node *ConvF2LNode::Ideal(PhaseGVN *phase, bool can_reshape) { | |
| 899 if( in(1)->Opcode() == Op_RoundFloat ) | |
| 900 set_req(1,in(1)->in(1)); | |
| 901 return NULL; | |
| 902 } | |
| 903 | |
| 904 //============================================================================= | |
| 905 //------------------------------Value------------------------------------------ | |
| 906 const Type *ConvI2DNode::Value( PhaseTransform *phase ) const { | |
| 907 const Type *t = phase->type( in(1) ); | |
| 908 if( t == Type::TOP ) return Type::TOP; | |
| 909 const TypeInt *ti = t->is_int(); | |
| 910 if( ti->is_con() ) return TypeD::make( (double)ti->get_con() ); | |
| 911 return bottom_type(); | |
| 912 } | |
| 913 | |
| 914 //============================================================================= | |
| 915 //------------------------------Value------------------------------------------ | |
| 916 const Type *ConvI2FNode::Value( PhaseTransform *phase ) const { | |
| 917 const Type *t = phase->type( in(1) ); | |
| 918 if( t == Type::TOP ) return Type::TOP; | |
| 919 const TypeInt *ti = t->is_int(); | |
| 920 if( ti->is_con() ) return TypeF::make( (float)ti->get_con() ); | |
| 921 return bottom_type(); | |
| 922 } | |
| 923 | |
| 924 //------------------------------Identity--------------------------------------- | |
| 925 Node *ConvI2FNode::Identity(PhaseTransform *phase) { | |
| 926 // Remove ConvI2F->ConvF2I->ConvI2F sequences. | |
| 927 if( in(1) ->Opcode() == Op_ConvF2I && | |
| 928 in(1)->in(1)->Opcode() == Op_ConvI2F ) | |
| 929 return in(1)->in(1); | |
| 930 return this; | |
| 931 } | |
| 932 | |
| 933 //============================================================================= | |
| 934 //------------------------------Value------------------------------------------ | |
| 935 const Type *ConvI2LNode::Value( PhaseTransform *phase ) const { | |
| 936 const Type *t = phase->type( in(1) ); | |
| 937 if( t == Type::TOP ) return Type::TOP; | |
| 938 const TypeInt *ti = t->is_int(); | |
| 939 const Type* tl = TypeLong::make(ti->_lo, ti->_hi, ti->_widen); | |
| 940 // Join my declared type against my incoming type. | |
| 941 tl = tl->filter(_type); | |
| 942 return tl; | |
| 943 } | |
| 944 | |
| 945 #ifdef _LP64 | |
| 946 static inline bool long_ranges_overlap(jlong lo1, jlong hi1, | |
| 947 jlong lo2, jlong hi2) { | |
| 948 // Two ranges overlap iff one range's low point falls in the other range. | |
| 949 return (lo2 <= lo1 && lo1 <= hi2) || (lo1 <= lo2 && lo2 <= hi1); | |
| 950 } | |
| 951 #endif | |
| 952 | |
| 953 //------------------------------Ideal------------------------------------------ | |
| 954 Node *ConvI2LNode::Ideal(PhaseGVN *phase, bool can_reshape) { | |
| 955 const TypeLong* this_type = this->type()->is_long(); | |
| 956 Node* this_changed = NULL; | |
| 957 | |
| 958 // If _major_progress, then more loop optimizations follow. Do NOT | |
| 959 // remove this node's type assertion until no more loop ops can happen. | |
| 960 // The progress bit is set in the major loop optimizations THEN comes the | |
| 961 // call to IterGVN and any chance of hitting this code. Cf. Opaque1Node. | |
| 962 if (can_reshape && !phase->C->major_progress()) { | |
| 963 const TypeInt* in_type = phase->type(in(1))->isa_int(); | |
| 964 if (in_type != NULL && this_type != NULL && | |
| 965 (in_type->_lo != this_type->_lo || | |
| 966 in_type->_hi != this_type->_hi)) { | |
| 967 // Although this WORSENS the type, it increases GVN opportunities, | |
| 968 // because I2L nodes with the same input will common up, regardless | |
| 969 // of slightly differing type assertions. Such slight differences | |
| 970 // arise routinely as a result of loop unrolling, so this is a | |
| 971 // post-unrolling graph cleanup. Choose a type which depends only | |
| 972 // on my input. (Exception: Keep a range assertion of >=0 or <0.) | |
| 973 jlong lo1 = this_type->_lo; | |
| 974 jlong hi1 = this_type->_hi; | |
| 975 int w1 = this_type->_widen; | |
| 976 if (lo1 != (jint)lo1 || | |
| 977 hi1 != (jint)hi1 || | |
| 978 lo1 > hi1) { | |
| 979 // Overflow leads to wraparound, wraparound leads to range saturation. | |
| 980 lo1 = min_jint; hi1 = max_jint; | |
| 981 } else if (lo1 >= 0) { | |
| 982 // Keep a range assertion of >=0. | |
| 983 lo1 = 0; hi1 = max_jint; | |
| 984 } else if (hi1 < 0) { | |
| 985 // Keep a range assertion of <0. | |
| 986 lo1 = min_jint; hi1 = -1; | |
| 987 } else { | |
| 988 lo1 = min_jint; hi1 = max_jint; | |
| 989 } | |
| 990 const TypeLong* wtype = TypeLong::make(MAX2((jlong)in_type->_lo, lo1), | |
| 991 MIN2((jlong)in_type->_hi, hi1), | |
| 992 MAX2((int)in_type->_widen, w1)); | |
| 993 if (wtype != type()) { | |
| 994 set_type(wtype); | |
| 995 // Note: this_type still has old type value, for the logic below. | |
| 996 this_changed = this; | |
| 997 } | |
| 998 } | |
| 999 } | |
| 1000 | |
| 1001 #ifdef _LP64 | |
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1002 // Convert ConvI2L(AddI(x, y)) to AddL(ConvI2L(x), ConvI2L(y)) or |
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1003 // ConvI2L(CastII(AddI(x, y))) to AddL(ConvI2L(CastII(x)), ConvI2L(CastII(y))), |
| 0 | 1004 // but only if x and y have subranges that cannot cause 32-bit overflow, |
| 1005 // under the assumption that x+y is in my own subrange this->type(). | |
| 1006 | |
| 1007 // This assumption is based on a constraint (i.e., type assertion) | |
| 1008 // established in Parse::array_addressing or perhaps elsewhere. | |
| 1009 // This constraint has been adjoined to the "natural" type of | |
| 1010 // the incoming argument in(0). We know (because of runtime | |
| 1011 // checks) - that the result value I2L(x+y) is in the joined range. | |
| 1012 // Hence we can restrict the incoming terms (x, y) to values such | |
| 1013 // that their sum also lands in that range. | |
| 1014 | |
| 1015 // This optimization is useful only on 64-bit systems, where we hope | |
| 1016 // the addition will end up subsumed in an addressing mode. | |
| 1017 // It is necessary to do this when optimizing an unrolled array | |
| 1018 // copy loop such as x[i++] = y[i++]. | |
| 1019 | |
| 1020 // On 32-bit systems, it's better to perform as much 32-bit math as | |
| 1021 // possible before the I2L conversion, because 32-bit math is cheaper. | |
| 1022 // There's no common reason to "leak" a constant offset through the I2L. | |
| 1023 // Addressing arithmetic will not absorb it as part of a 64-bit AddL. | |
| 1024 | |
| 1025 Node* z = in(1); | |
| 1026 int op = z->Opcode(); | |
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1027 Node* ctrl = NULL; |
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1028 if (op == Op_CastII && z->as_CastII()->has_range_check()) { |
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1029 // Skip CastII node but save control dependency |
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1030 ctrl = z->in(0); |
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1031 z = z->in(1); |
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1032 op = z->Opcode(); |
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1033 } |
| 0 | 1034 if (op == Op_AddI || op == Op_SubI) { |
| 1035 Node* x = z->in(1); | |
| 1036 Node* y = z->in(2); | |
| 1037 assert (x != z && y != z, "dead loop in ConvI2LNode::Ideal"); | |
| 1038 if (phase->type(x) == Type::TOP) return this_changed; | |
| 1039 if (phase->type(y) == Type::TOP) return this_changed; | |
| 1040 const TypeInt* tx = phase->type(x)->is_int(); | |
| 1041 const TypeInt* ty = phase->type(y)->is_int(); | |
| 1042 const TypeLong* tz = this_type; | |
| 1043 jlong xlo = tx->_lo; | |
| 1044 jlong xhi = tx->_hi; | |
| 1045 jlong ylo = ty->_lo; | |
| 1046 jlong yhi = ty->_hi; | |
| 1047 jlong zlo = tz->_lo; | |
| 1048 jlong zhi = tz->_hi; | |
| 1049 jlong vbit = CONST64(1) << BitsPerInt; | |
| 1050 int widen = MAX2(tx->_widen, ty->_widen); | |
| 1051 if (op == Op_SubI) { | |
| 1052 jlong ylo0 = ylo; | |
| 1053 ylo = -yhi; | |
| 1054 yhi = -ylo0; | |
| 1055 } | |
| 1056 // See if x+y can cause positive overflow into z+2**32 | |
| 1057 if (long_ranges_overlap(xlo+ylo, xhi+yhi, zlo+vbit, zhi+vbit)) { | |
| 1058 return this_changed; | |
| 1059 } | |
| 1060 // See if x+y can cause negative overflow into z-2**32 | |
| 1061 if (long_ranges_overlap(xlo+ylo, xhi+yhi, zlo-vbit, zhi-vbit)) { | |
| 1062 return this_changed; | |
| 1063 } | |
| 1064 // Now it's always safe to assume x+y does not overflow. | |
| 1065 // This is true even if some pairs x,y might cause overflow, as long | |
| 1066 // as that overflow value cannot fall into [zlo,zhi]. | |
| 1067 | |
| 1068 // Confident that the arithmetic is "as if infinite precision", | |
| 1069 // we can now use z's range to put constraints on those of x and y. | |
| 1070 // The "natural" range of x [xlo,xhi] can perhaps be narrowed to a | |
| 1071 // more "restricted" range by intersecting [xlo,xhi] with the | |
| 1072 // range obtained by subtracting y's range from the asserted range | |
| 1073 // of the I2L conversion. Here's the interval arithmetic algebra: | |
| 1074 // x == z-y == [zlo,zhi]-[ylo,yhi] == [zlo,zhi]+[-yhi,-ylo] | |
| 1075 // => x in [zlo-yhi, zhi-ylo] | |
| 1076 // => x in [zlo-yhi, zhi-ylo] INTERSECT [xlo,xhi] | |
| 1077 // => x in [xlo MAX zlo-yhi, xhi MIN zhi-ylo] | |
| 1078 jlong rxlo = MAX2(xlo, zlo - yhi); | |
| 1079 jlong rxhi = MIN2(xhi, zhi - ylo); | |
| 1080 // And similarly, x changing place with y: | |
| 1081 jlong rylo = MAX2(ylo, zlo - xhi); | |
| 1082 jlong ryhi = MIN2(yhi, zhi - xlo); | |
| 1083 if (rxlo > rxhi || rylo > ryhi) { | |
| 1084 return this_changed; // x or y is dying; don't mess w/ it | |
| 1085 } | |
| 1086 if (op == Op_SubI) { | |
| 1087 jlong rylo0 = rylo; | |
| 1088 rylo = -ryhi; | |
| 1089 ryhi = -rylo0; | |
| 1090 } | |
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1091 assert(rxlo == (int)rxlo && rxhi == (int)rxhi, "x should not overflow"); |
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1092 assert(rylo == (int)rylo && ryhi == (int)ryhi, "y should not overflow"); |
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1093 Node* cx = phase->C->constrained_convI2L(phase, x, TypeInt::make(rxlo, rxhi, widen), ctrl); |
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1094 Node* cy = phase->C->constrained_convI2L(phase, y, TypeInt::make(rylo, ryhi, widen), ctrl); |
| 0 | 1095 switch (op) { |
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1096 case Op_AddI: return new (phase->C) AddLNode(cx, cy); |
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1097 case Op_SubI: return new (phase->C) SubLNode(cx, cy); |
| 0 | 1098 default: ShouldNotReachHere(); |
| 1099 } | |
| 1100 } | |
| 1101 #endif //_LP64 | |
| 1102 | |
| 1103 return this_changed; | |
| 1104 } | |
| 1105 | |
| 1106 //============================================================================= | |
| 1107 //------------------------------Value------------------------------------------ | |
| 1108 const Type *ConvL2DNode::Value( PhaseTransform *phase ) const { | |
| 1109 const Type *t = phase->type( in(1) ); | |
| 1110 if( t == Type::TOP ) return Type::TOP; | |
| 1111 const TypeLong *tl = t->is_long(); | |
| 1112 if( tl->is_con() ) return TypeD::make( (double)tl->get_con() ); | |
| 1113 return bottom_type(); | |
| 1114 } | |
| 1115 | |
| 1116 //============================================================================= | |
| 1117 //------------------------------Value------------------------------------------ | |
| 1118 const Type *ConvL2FNode::Value( PhaseTransform *phase ) const { | |
| 1119 const Type *t = phase->type( in(1) ); | |
| 1120 if( t == Type::TOP ) return Type::TOP; | |
| 1121 const TypeLong *tl = t->is_long(); | |
| 1122 if( tl->is_con() ) return TypeF::make( (float)tl->get_con() ); | |
| 1123 return bottom_type(); | |
| 1124 } | |
| 1125 | |
| 1126 //============================================================================= | |
| 1127 //----------------------------Identity----------------------------------------- | |
| 1128 Node *ConvL2INode::Identity( PhaseTransform *phase ) { | |
| 1129 // Convert L2I(I2L(x)) => x | |
| 1130 if (in(1)->Opcode() == Op_ConvI2L) return in(1)->in(1); | |
| 1131 return this; | |
| 1132 } | |
| 1133 | |
| 1134 //------------------------------Value------------------------------------------ | |
| 1135 const Type *ConvL2INode::Value( PhaseTransform *phase ) const { | |
| 1136 const Type *t = phase->type( in(1) ); | |
| 1137 if( t == Type::TOP ) return Type::TOP; | |
| 1138 const TypeLong *tl = t->is_long(); | |
| 1139 if (tl->is_con()) | |
| 1140 // Easy case. | |
| 1141 return TypeInt::make((jint)tl->get_con()); | |
| 1142 return bottom_type(); | |
| 1143 } | |
| 1144 | |
| 1145 //------------------------------Ideal------------------------------------------ | |
| 1146 // Return a node which is more "ideal" than the current node. | |
| 1147 // Blow off prior masking to int | |
| 1148 Node *ConvL2INode::Ideal(PhaseGVN *phase, bool can_reshape) { | |
| 1149 Node *andl = in(1); | |
| 1150 uint andl_op = andl->Opcode(); | |
| 1151 if( andl_op == Op_AndL ) { | |
| 1152 // Blow off prior masking to int | |
| 1153 if( phase->type(andl->in(2)) == TypeLong::make( 0xFFFFFFFF ) ) { | |
| 1154 set_req(1,andl->in(1)); | |
| 1155 return this; | |
| 1156 } | |
| 1157 } | |
| 1158 | |
| 1159 // Swap with a prior add: convL2I(addL(x,y)) ==> addI(convL2I(x),convL2I(y)) | |
| 1160 // This replaces an 'AddL' with an 'AddI'. | |
| 1161 if( andl_op == Op_AddL ) { | |
| 1162 // Don't do this for nodes which have more than one user since | |
| 1163 // we'll end up computing the long add anyway. | |
| 1164 if (andl->outcnt() > 1) return NULL; | |
| 1165 | |
| 1166 Node* x = andl->in(1); | |
| 1167 Node* y = andl->in(2); | |
| 1168 assert( x != andl && y != andl, "dead loop in ConvL2INode::Ideal" ); | |
| 1169 if (phase->type(x) == Type::TOP) return NULL; | |
| 1170 if (phase->type(y) == Type::TOP) return NULL; | |
|
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1171 Node *add1 = phase->transform(new (phase->C) ConvL2INode(x)); |
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1172 Node *add2 = phase->transform(new (phase->C) ConvL2INode(y)); |
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1173 return new (phase->C) AddINode(add1,add2); |
| 0 | 1174 } |
| 1175 | |
| 36 | 1176 // Disable optimization: LoadL->ConvL2I ==> LoadI. |
| 1177 // It causes problems (sizes of Load and Store nodes do not match) | |
| 1178 // in objects initialization code and Escape Analysis. | |
| 0 | 1179 return NULL; |
| 1180 } | |
| 1181 | |
| 1182 //============================================================================= | |
| 1183 //------------------------------Value------------------------------------------ | |
| 1184 const Type *CastX2PNode::Value( PhaseTransform *phase ) const { | |
| 1185 const Type* t = phase->type(in(1)); | |
| 5901 | 1186 if (t == Type::TOP) return Type::TOP; |
| 0 | 1187 if (t->base() == Type_X && t->singleton()) { |
| 1188 uintptr_t bits = (uintptr_t) t->is_intptr_t()->get_con(); | |
| 1189 if (bits == 0) return TypePtr::NULL_PTR; | |
| 1190 return TypeRawPtr::make((address) bits); | |
| 1191 } | |
| 1192 return CastX2PNode::bottom_type(); | |
| 1193 } | |
| 1194 | |
| 1195 //------------------------------Idealize--------------------------------------- | |
| 1196 static inline bool fits_in_int(const Type* t, bool but_not_min_int = false) { | |
| 1197 if (t == Type::TOP) return false; | |
| 1198 const TypeX* tl = t->is_intptr_t(); | |
| 1199 jint lo = min_jint; | |
| 1200 jint hi = max_jint; | |
| 1201 if (but_not_min_int) ++lo; // caller wants to negate the value w/o overflow | |
| 1202 return (tl->_lo >= lo) && (tl->_hi <= hi); | |
| 1203 } | |
| 1204 | |
| 1205 static inline Node* addP_of_X2P(PhaseGVN *phase, | |
| 1206 Node* base, | |
| 1207 Node* dispX, | |
| 1208 bool negate = false) { | |
| 1209 if (negate) { | |
|
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1210 dispX = new (phase->C) SubXNode(phase->MakeConX(0), phase->transform(dispX)); |
| 0 | 1211 } |
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1212 return new (phase->C) AddPNode(phase->C->top(), |
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1213 phase->transform(new (phase->C) CastX2PNode(base)), |
| 0 | 1214 phase->transform(dispX)); |
| 1215 } | |
| 1216 | |
| 1217 Node *CastX2PNode::Ideal(PhaseGVN *phase, bool can_reshape) { | |
| 1218 // convert CastX2P(AddX(x, y)) to AddP(CastX2P(x), y) if y fits in an int | |
| 1219 int op = in(1)->Opcode(); | |
| 1220 Node* x; | |
| 1221 Node* y; | |
| 1222 switch (op) { | |
| 1223 case Op_SubX: | |
| 1224 x = in(1)->in(1); | |
|
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1225 // Avoid ideal transformations ping-pong between this and AddP for raw pointers. |
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1226 if (phase->find_intptr_t_con(x, -1) == 0) |
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1227 break; |
| 0 | 1228 y = in(1)->in(2); |
| 1229 if (fits_in_int(phase->type(y), true)) { | |
| 1230 return addP_of_X2P(phase, x, y, true); | |
| 1231 } | |
| 1232 break; | |
| 1233 case Op_AddX: | |
| 1234 x = in(1)->in(1); | |
| 1235 y = in(1)->in(2); | |
| 1236 if (fits_in_int(phase->type(y))) { | |
| 1237 return addP_of_X2P(phase, x, y); | |
| 1238 } | |
| 1239 if (fits_in_int(phase->type(x))) { | |
| 1240 return addP_of_X2P(phase, y, x); | |
| 1241 } | |
| 1242 break; | |
| 1243 } | |
| 1244 return NULL; | |
| 1245 } | |
| 1246 | |
| 1247 //------------------------------Identity--------------------------------------- | |
| 1248 Node *CastX2PNode::Identity( PhaseTransform *phase ) { | |
| 1249 if (in(1)->Opcode() == Op_CastP2X) return in(1)->in(1); | |
| 1250 return this; | |
| 1251 } | |
| 1252 | |
| 1253 //============================================================================= | |
| 1254 //------------------------------Value------------------------------------------ | |
| 1255 const Type *CastP2XNode::Value( PhaseTransform *phase ) const { | |
| 1256 const Type* t = phase->type(in(1)); | |
| 5901 | 1257 if (t == Type::TOP) return Type::TOP; |
| 0 | 1258 if (t->base() == Type::RawPtr && t->singleton()) { |
| 1259 uintptr_t bits = (uintptr_t) t->is_rawptr()->get_con(); | |
| 1260 return TypeX::make(bits); | |
| 1261 } | |
| 1262 return CastP2XNode::bottom_type(); | |
| 1263 } | |
| 1264 | |
| 1265 Node *CastP2XNode::Ideal(PhaseGVN *phase, bool can_reshape) { | |
| 1266 return (in(0) && remove_dead_region(phase, can_reshape)) ? this : NULL; | |
| 1267 } | |
| 1268 | |
| 1269 //------------------------------Identity--------------------------------------- | |
| 1270 Node *CastP2XNode::Identity( PhaseTransform *phase ) { | |
| 1271 if (in(1)->Opcode() == Op_CastX2P) return in(1)->in(1); | |
| 1272 return this; | |
| 1273 } | |
| 1274 | |
| 1275 | |
| 1276 //============================================================================= | |
| 1277 //------------------------------Identity--------------------------------------- | |
| 1278 // Remove redundant roundings | |
| 1279 Node *RoundFloatNode::Identity( PhaseTransform *phase ) { | |
| 1280 assert(Matcher::strict_fp_requires_explicit_rounding, "should only generate for Intel"); | |
| 1281 // Do not round constants | |
| 1282 if (phase->type(in(1))->base() == Type::FloatCon) return in(1); | |
| 1283 int op = in(1)->Opcode(); | |
| 1284 // Redundant rounding | |
| 1285 if( op == Op_RoundFloat ) return in(1); | |
| 1286 // Already rounded | |
| 1287 if( op == Op_Parm ) return in(1); | |
| 1288 if( op == Op_LoadF ) return in(1); | |
| 1289 return this; | |
| 1290 } | |
| 1291 | |
| 1292 //------------------------------Value------------------------------------------ | |
| 1293 const Type *RoundFloatNode::Value( PhaseTransform *phase ) const { | |
| 1294 return phase->type( in(1) ); | |
| 1295 } | |
| 1296 | |
| 1297 //============================================================================= | |
| 1298 //------------------------------Identity--------------------------------------- | |
| 1299 // Remove redundant roundings. Incoming arguments are already rounded. | |
| 1300 Node *RoundDoubleNode::Identity( PhaseTransform *phase ) { | |
| 1301 assert(Matcher::strict_fp_requires_explicit_rounding, "should only generate for Intel"); | |
| 1302 // Do not round constants | |
| 1303 if (phase->type(in(1))->base() == Type::DoubleCon) return in(1); | |
| 1304 int op = in(1)->Opcode(); | |
| 1305 // Redundant rounding | |
| 1306 if( op == Op_RoundDouble ) return in(1); | |
| 1307 // Already rounded | |
| 1308 if( op == Op_Parm ) return in(1); | |
| 1309 if( op == Op_LoadD ) return in(1); | |
| 1310 if( op == Op_ConvF2D ) return in(1); | |
| 1311 if( op == Op_ConvI2D ) return in(1); | |
| 1312 return this; | |
| 1313 } | |
| 1314 | |
| 1315 //------------------------------Value------------------------------------------ | |
| 1316 const Type *RoundDoubleNode::Value( PhaseTransform *phase ) const { | |
| 1317 return phase->type( in(1) ); | |
| 1318 } | |
| 1319 | |
| 1320 | |
| 1321 //============================================================================= | |
| 1322 // Do not allow value-numbering | |
| 1323 uint Opaque1Node::hash() const { return NO_HASH; } | |
| 1324 uint Opaque1Node::cmp( const Node &n ) const { | |
| 1325 return (&n == this); // Always fail except on self | |
| 1326 } | |
| 1327 | |
| 1328 //------------------------------Identity--------------------------------------- | |
| 1329 // If _major_progress, then more loop optimizations follow. Do NOT remove | |
| 1330 // the opaque Node until no more loop ops can happen. Note the timing of | |
| 1331 // _major_progress; it's set in the major loop optimizations THEN comes the | |
| 1332 // call to IterGVN and any chance of hitting this code. Hence there's no | |
| 1333 // phase-ordering problem with stripping Opaque1 in IGVN followed by some | |
| 1334 // more loop optimizations that require it. | |
| 1335 Node *Opaque1Node::Identity( PhaseTransform *phase ) { | |
| 1336 return phase->C->major_progress() ? this : in(1); | |
| 1337 } | |
| 1338 | |
| 1339 //============================================================================= | |
| 1340 // A node to prevent unwanted optimizations. Allows constant folding. Stops | |
| 1341 // value-numbering, most Ideal calls or Identity functions. This Node is | |
| 1342 // specifically designed to prevent the pre-increment value of a loop trip | |
| 1343 // counter from being live out of the bottom of the loop (hence causing the | |
| 1344 // pre- and post-increment values both being live and thus requiring an extra | |
| 1345 // temp register and an extra move). If we "accidentally" optimize through | |
| 1346 // this kind of a Node, we'll get slightly pessimal, but correct, code. Thus | |
| 1347 // it's OK to be slightly sloppy on optimizations here. | |
| 1348 | |
| 1349 // Do not allow value-numbering | |
| 1350 uint Opaque2Node::hash() const { return NO_HASH; } | |
| 1351 uint Opaque2Node::cmp( const Node &n ) const { | |
| 1352 return (&n == this); // Always fail except on self | |
| 1353 } | |
| 1354 | |
|
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1355 //============================================================================= |
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1356 |
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1357 uint ProfileBooleanNode::hash() const { return NO_HASH; } |
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1358 uint ProfileBooleanNode::cmp( const Node &n ) const { |
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1359 return (&n == this); |
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1360 } |
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1361 |
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1362 Node *ProfileBooleanNode::Ideal(PhaseGVN *phase, bool can_reshape) { |
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1363 if (can_reshape && _delay_removal) { |
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1364 _delay_removal = false; |
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1365 return this; |
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1366 } else { |
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1367 return NULL; |
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1368 } |
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1369 } |
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1370 |
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1371 Node *ProfileBooleanNode::Identity( PhaseTransform *phase ) { |
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1372 if (_delay_removal) { |
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1373 return this; |
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1374 } else { |
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1375 assert(_consumed, "profile should be consumed before elimination"); |
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1376 return in(1); |
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1377 } |
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1378 } |
| 0 | 1379 |
| 1380 //------------------------------Value------------------------------------------ | |
| 1381 const Type *MoveL2DNode::Value( PhaseTransform *phase ) const { | |
| 1382 const Type *t = phase->type( in(1) ); | |
| 1383 if( t == Type::TOP ) return Type::TOP; | |
| 1384 const TypeLong *tl = t->is_long(); | |
| 1385 if( !tl->is_con() ) return bottom_type(); | |
| 1386 JavaValue v; | |
| 1387 v.set_jlong(tl->get_con()); | |
| 1388 return TypeD::make( v.get_jdouble() ); | |
| 1389 } | |
| 1390 | |
| 1391 //------------------------------Value------------------------------------------ | |
| 1392 const Type *MoveI2FNode::Value( PhaseTransform *phase ) const { | |
| 1393 const Type *t = phase->type( in(1) ); | |
| 1394 if( t == Type::TOP ) return Type::TOP; | |
| 1395 const TypeInt *ti = t->is_int(); | |
| 1396 if( !ti->is_con() ) return bottom_type(); | |
| 1397 JavaValue v; | |
| 1398 v.set_jint(ti->get_con()); | |
| 1399 return TypeF::make( v.get_jfloat() ); | |
| 1400 } | |
| 1401 | |
| 1402 //------------------------------Value------------------------------------------ | |
| 1403 const Type *MoveF2INode::Value( PhaseTransform *phase ) const { | |
| 1404 const Type *t = phase->type( in(1) ); | |
| 1405 if( t == Type::TOP ) return Type::TOP; | |
| 1406 if( t == Type::FLOAT ) return TypeInt::INT; | |
| 1407 const TypeF *tf = t->is_float_constant(); | |
| 1408 JavaValue v; | |
| 1409 v.set_jfloat(tf->getf()); | |
| 1410 return TypeInt::make( v.get_jint() ); | |
| 1411 } | |
| 1412 | |
| 1413 //------------------------------Value------------------------------------------ | |
| 1414 const Type *MoveD2LNode::Value( PhaseTransform *phase ) const { | |
| 1415 const Type *t = phase->type( in(1) ); | |
| 1416 if( t == Type::TOP ) return Type::TOP; | |
| 1417 if( t == Type::DOUBLE ) return TypeLong::LONG; | |
| 1418 const TypeD *td = t->is_double_constant(); | |
| 1419 JavaValue v; | |
| 1420 v.set_jdouble(td->getd()); | |
| 1421 return TypeLong::make( v.get_jlong() ); | |
| 1422 } | |
|
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1423 |
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1424 //------------------------------Value------------------------------------------ |
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1425 const Type* CountLeadingZerosINode::Value(PhaseTransform* phase) const { |
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1426 const Type* t = phase->type(in(1)); |
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1427 if (t == Type::TOP) return Type::TOP; |
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1428 const TypeInt* ti = t->isa_int(); |
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1429 if (ti && ti->is_con()) { |
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1430 jint i = ti->get_con(); |
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1431 // HD, Figure 5-6 |
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1432 if (i == 0) |
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1433 return TypeInt::make(BitsPerInt); |
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1434 int n = 1; |
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1435 unsigned int x = i; |
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1436 if (x >> 16 == 0) { n += 16; x <<= 16; } |
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1437 if (x >> 24 == 0) { n += 8; x <<= 8; } |
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1438 if (x >> 28 == 0) { n += 4; x <<= 4; } |
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1439 if (x >> 30 == 0) { n += 2; x <<= 2; } |
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1440 n -= x >> 31; |
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1441 return TypeInt::make(n); |
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1442 } |
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1443 return TypeInt::INT; |
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1444 } |
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1445 |
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1446 //------------------------------Value------------------------------------------ |
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1447 const Type* CountLeadingZerosLNode::Value(PhaseTransform* phase) const { |
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1448 const Type* t = phase->type(in(1)); |
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1449 if (t == Type::TOP) return Type::TOP; |
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1450 const TypeLong* tl = t->isa_long(); |
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1451 if (tl && tl->is_con()) { |
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1452 jlong l = tl->get_con(); |
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1453 // HD, Figure 5-6 |
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1454 if (l == 0) |
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1455 return TypeInt::make(BitsPerLong); |
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1456 int n = 1; |
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1457 unsigned int x = (((julong) l) >> 32); |
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1458 if (x == 0) { n += 32; x = (int) l; } |
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1459 if (x >> 16 == 0) { n += 16; x <<= 16; } |
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1460 if (x >> 24 == 0) { n += 8; x <<= 8; } |
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1461 if (x >> 28 == 0) { n += 4; x <<= 4; } |
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1462 if (x >> 30 == 0) { n += 2; x <<= 2; } |
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1463 n -= x >> 31; |
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1464 return TypeInt::make(n); |
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1465 } |
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1466 return TypeInt::INT; |
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1467 } |
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1468 |
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1469 //------------------------------Value------------------------------------------ |
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1470 const Type* CountTrailingZerosINode::Value(PhaseTransform* phase) const { |
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1471 const Type* t = phase->type(in(1)); |
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1472 if (t == Type::TOP) return Type::TOP; |
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1473 const TypeInt* ti = t->isa_int(); |
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1474 if (ti && ti->is_con()) { |
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1475 jint i = ti->get_con(); |
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1476 // HD, Figure 5-14 |
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1477 int y; |
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1478 if (i == 0) |
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1479 return TypeInt::make(BitsPerInt); |
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1480 int n = 31; |
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1481 y = i << 16; if (y != 0) { n = n - 16; i = y; } |
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1482 y = i << 8; if (y != 0) { n = n - 8; i = y; } |
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1483 y = i << 4; if (y != 0) { n = n - 4; i = y; } |
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1484 y = i << 2; if (y != 0) { n = n - 2; i = y; } |
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1485 y = i << 1; if (y != 0) { n = n - 1; } |
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1486 return TypeInt::make(n); |
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1487 } |
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1488 return TypeInt::INT; |
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1489 } |
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1490 |
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1491 //------------------------------Value------------------------------------------ |
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1492 const Type* CountTrailingZerosLNode::Value(PhaseTransform* phase) const { |
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1493 const Type* t = phase->type(in(1)); |
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1494 if (t == Type::TOP) return Type::TOP; |
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1495 const TypeLong* tl = t->isa_long(); |
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1496 if (tl && tl->is_con()) { |
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1497 jlong l = tl->get_con(); |
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1498 // HD, Figure 5-14 |
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1499 int x, y; |
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1500 if (l == 0) |
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1501 return TypeInt::make(BitsPerLong); |
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1502 int n = 63; |
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1503 y = (int) l; if (y != 0) { n = n - 32; x = y; } else x = (((julong) l) >> 32); |
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1504 y = x << 16; if (y != 0) { n = n - 16; x = y; } |
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1505 y = x << 8; if (y != 0) { n = n - 8; x = y; } |
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1506 y = x << 4; if (y != 0) { n = n - 4; x = y; } |
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1507 y = x << 2; if (y != 0) { n = n - 2; x = y; } |
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1508 y = x << 1; if (y != 0) { n = n - 1; } |
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1509 return TypeInt::make(n); |
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1510 } |
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1511 return TypeInt::INT; |
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1512 } |