Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1 | // Copyright 2015 the V8 project authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #include "src/compiler/representation-change.h" |
| 6 | |
| 7 | #include <sstream> |
| 8 | |
| 9 | #include "src/base/bits.h" |
| 10 | #include "src/code-factory.h" |
| 11 | #include "src/compiler/machine-operator.h" |
| 12 | |
| 13 | namespace v8 { |
| 14 | namespace internal { |
| 15 | namespace compiler { |
| 16 | |
| 17 | const char* Truncation::description() const { |
| 18 | switch (kind()) { |
| 19 | case TruncationKind::kNone: |
| 20 | return "no-value-use"; |
| 21 | case TruncationKind::kBool: |
| 22 | return "truncate-to-bool"; |
| 23 | case TruncationKind::kWord32: |
| 24 | return "truncate-to-word32"; |
| 25 | case TruncationKind::kWord64: |
| 26 | return "truncate-to-word64"; |
| 27 | case TruncationKind::kFloat32: |
| 28 | return "truncate-to-float32"; |
| 29 | case TruncationKind::kFloat64: |
| 30 | return "truncate-to-float64"; |
| 31 | case TruncationKind::kAny: |
| 32 | return "no-truncation"; |
| 33 | } |
| 34 | UNREACHABLE(); |
| 35 | return nullptr; |
| 36 | } |
| 37 | |
| 38 | |
| 39 | // Partial order for truncations: |
| 40 | // |
| 41 | // kWord64 kAny |
| 42 | // ^ ^ |
| 43 | // \ | |
| 44 | // \ kFloat64 <--+ |
| 45 | // \ ^ ^ | |
| 46 | // \ / | | |
| 47 | // kWord32 kFloat32 kBool |
| 48 | // ^ ^ ^ |
| 49 | // \ | / |
| 50 | // \ | / |
| 51 | // \ | / |
| 52 | // \ | / |
| 53 | // \ | / |
| 54 | // kNone |
| 55 | |
| 56 | // static |
| 57 | Truncation::TruncationKind Truncation::Generalize(TruncationKind rep1, |
| 58 | TruncationKind rep2) { |
| 59 | if (LessGeneral(rep1, rep2)) return rep2; |
| 60 | if (LessGeneral(rep2, rep1)) return rep1; |
| 61 | // Handle the generalization of float64-representable values. |
| 62 | if (LessGeneral(rep1, TruncationKind::kFloat64) && |
| 63 | LessGeneral(rep2, TruncationKind::kFloat64)) { |
| 64 | return TruncationKind::kFloat64; |
| 65 | } |
| 66 | // All other combinations are illegal. |
| 67 | FATAL("Tried to combine incompatible truncations"); |
| 68 | return TruncationKind::kNone; |
| 69 | } |
| 70 | |
| 71 | |
| 72 | // static |
| 73 | bool Truncation::LessGeneral(TruncationKind rep1, TruncationKind rep2) { |
| 74 | switch (rep1) { |
| 75 | case TruncationKind::kNone: |
| 76 | return true; |
| 77 | case TruncationKind::kBool: |
| 78 | return rep2 == TruncationKind::kBool || rep2 == TruncationKind::kAny; |
| 79 | case TruncationKind::kWord32: |
| 80 | return rep2 == TruncationKind::kWord32 || |
| 81 | rep2 == TruncationKind::kWord64 || |
| 82 | rep2 == TruncationKind::kFloat64 || rep2 == TruncationKind::kAny; |
| 83 | case TruncationKind::kWord64: |
| 84 | return rep2 == TruncationKind::kWord64; |
| 85 | case TruncationKind::kFloat32: |
| 86 | return rep2 == TruncationKind::kFloat32 || |
| 87 | rep2 == TruncationKind::kFloat64 || rep2 == TruncationKind::kAny; |
| 88 | case TruncationKind::kFloat64: |
| 89 | return rep2 == TruncationKind::kFloat64 || rep2 == TruncationKind::kAny; |
| 90 | case TruncationKind::kAny: |
| 91 | return rep2 == TruncationKind::kAny; |
| 92 | } |
| 93 | UNREACHABLE(); |
| 94 | return false; |
| 95 | } |
| 96 | |
| 97 | |
| 98 | namespace { |
| 99 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 100 | bool IsWord(MachineRepresentation rep) { |
| 101 | return rep == MachineRepresentation::kWord8 || |
| 102 | rep == MachineRepresentation::kWord16 || |
| 103 | rep == MachineRepresentation::kWord32; |
| 104 | } |
| 105 | |
| 106 | } // namespace |
| 107 | |
| 108 | |
| 109 | // Changes representation from {output_rep} to {use_rep}. The {truncation} |
| 110 | // parameter is only used for sanity checking - if the changer cannot figure |
| 111 | // out signedness for the word32->float64 conversion, then we check that the |
| 112 | // uses truncate to word32 (so they do not care about signedness). |
| 113 | Node* RepresentationChanger::GetRepresentationFor( |
| 114 | Node* node, MachineRepresentation output_rep, Type* output_type, |
| 115 | MachineRepresentation use_rep, Truncation truncation) { |
| 116 | if (output_rep == MachineRepresentation::kNone) { |
| 117 | // The output representation should be set. |
| 118 | return TypeError(node, output_rep, output_type, use_rep); |
| 119 | } |
| 120 | if (use_rep == output_rep) { |
| 121 | // Representations are the same. That's a no-op. |
| 122 | return node; |
| 123 | } |
| 124 | if (IsWord(use_rep) && IsWord(output_rep)) { |
| 125 | // Both are words less than or equal to 32-bits. |
| 126 | // Since loads of integers from memory implicitly sign or zero extend the |
| 127 | // value to the full machine word size and stores implicitly truncate, |
| 128 | // no representation change is necessary. |
| 129 | return node; |
| 130 | } |
| 131 | switch (use_rep) { |
| 132 | case MachineRepresentation::kTagged: |
| 133 | return GetTaggedRepresentationFor(node, output_rep, output_type); |
| 134 | case MachineRepresentation::kFloat32: |
| 135 | return GetFloat32RepresentationFor(node, output_rep, output_type, |
| 136 | truncation); |
| 137 | case MachineRepresentation::kFloat64: |
| 138 | return GetFloat64RepresentationFor(node, output_rep, output_type, |
| 139 | truncation); |
| 140 | case MachineRepresentation::kBit: |
| 141 | return GetBitRepresentationFor(node, output_rep, output_type); |
| 142 | case MachineRepresentation::kWord8: |
| 143 | case MachineRepresentation::kWord16: |
| 144 | case MachineRepresentation::kWord32: |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 145 | return GetWord32RepresentationFor(node, output_rep, output_type, |
| 146 | truncation); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 147 | case MachineRepresentation::kWord64: |
| 148 | return GetWord64RepresentationFor(node, output_rep, output_type); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 149 | case MachineRepresentation::kSimd128: // Fall through. |
| 150 | // TODO(bbudge) Handle conversions between tagged and untagged. |
| 151 | break; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 152 | case MachineRepresentation::kNone: |
| 153 | return node; |
| 154 | } |
| 155 | UNREACHABLE(); |
| 156 | return nullptr; |
| 157 | } |
| 158 | |
| 159 | |
| 160 | Node* RepresentationChanger::GetTaggedRepresentationFor( |
| 161 | Node* node, MachineRepresentation output_rep, Type* output_type) { |
| 162 | // Eagerly fold representation changes for constants. |
| 163 | switch (node->opcode()) { |
| 164 | case IrOpcode::kNumberConstant: |
| 165 | case IrOpcode::kHeapConstant: |
| 166 | return node; // No change necessary. |
| 167 | case IrOpcode::kInt32Constant: |
| 168 | if (output_type->Is(Type::Signed32())) { |
| 169 | int32_t value = OpParameter<int32_t>(node); |
| 170 | return jsgraph()->Constant(value); |
| 171 | } else if (output_type->Is(Type::Unsigned32())) { |
| 172 | uint32_t value = static_cast<uint32_t>(OpParameter<int32_t>(node)); |
| 173 | return jsgraph()->Constant(static_cast<double>(value)); |
| 174 | } else if (output_rep == MachineRepresentation::kBit) { |
| 175 | return OpParameter<int32_t>(node) == 0 ? jsgraph()->FalseConstant() |
| 176 | : jsgraph()->TrueConstant(); |
| 177 | } else { |
| 178 | return TypeError(node, output_rep, output_type, |
| 179 | MachineRepresentation::kTagged); |
| 180 | } |
| 181 | case IrOpcode::kFloat64Constant: |
| 182 | return jsgraph()->Constant(OpParameter<double>(node)); |
| 183 | case IrOpcode::kFloat32Constant: |
| 184 | return jsgraph()->Constant(OpParameter<float>(node)); |
| 185 | default: |
| 186 | break; |
| 187 | } |
| 188 | // Select the correct X -> Tagged operator. |
| 189 | const Operator* op; |
| 190 | if (output_rep == MachineRepresentation::kBit) { |
| 191 | op = simplified()->ChangeBitToBool(); |
| 192 | } else if (IsWord(output_rep)) { |
| 193 | if (output_type->Is(Type::Unsigned32())) { |
| 194 | op = simplified()->ChangeUint32ToTagged(); |
| 195 | } else if (output_type->Is(Type::Signed32())) { |
| 196 | op = simplified()->ChangeInt32ToTagged(); |
| 197 | } else { |
| 198 | return TypeError(node, output_rep, output_type, |
| 199 | MachineRepresentation::kTagged); |
| 200 | } |
| 201 | } else if (output_rep == |
| 202 | MachineRepresentation::kFloat32) { // float32 -> float64 -> tagged |
| 203 | node = InsertChangeFloat32ToFloat64(node); |
| 204 | op = simplified()->ChangeFloat64ToTagged(); |
| 205 | } else if (output_rep == MachineRepresentation::kFloat64) { |
| 206 | op = simplified()->ChangeFloat64ToTagged(); |
| 207 | } else { |
| 208 | return TypeError(node, output_rep, output_type, |
| 209 | MachineRepresentation::kTagged); |
| 210 | } |
| 211 | return jsgraph()->graph()->NewNode(op, node); |
| 212 | } |
| 213 | |
| 214 | |
| 215 | Node* RepresentationChanger::GetFloat32RepresentationFor( |
| 216 | Node* node, MachineRepresentation output_rep, Type* output_type, |
| 217 | Truncation truncation) { |
| 218 | // Eagerly fold representation changes for constants. |
| 219 | switch (node->opcode()) { |
| 220 | case IrOpcode::kFloat64Constant: |
| 221 | case IrOpcode::kNumberConstant: |
| 222 | return jsgraph()->Float32Constant( |
| 223 | DoubleToFloat32(OpParameter<double>(node))); |
| 224 | case IrOpcode::kInt32Constant: |
| 225 | if (output_type->Is(Type::Unsigned32())) { |
| 226 | uint32_t value = static_cast<uint32_t>(OpParameter<int32_t>(node)); |
| 227 | return jsgraph()->Float32Constant(static_cast<float>(value)); |
| 228 | } else { |
| 229 | int32_t value = OpParameter<int32_t>(node); |
| 230 | return jsgraph()->Float32Constant(static_cast<float>(value)); |
| 231 | } |
| 232 | case IrOpcode::kFloat32Constant: |
| 233 | return node; // No change necessary. |
| 234 | default: |
| 235 | break; |
| 236 | } |
| 237 | // Select the correct X -> Float32 operator. |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 238 | const Operator* op = nullptr; |
| 239 | if (IsWord(output_rep)) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 240 | if (output_type->Is(Type::Signed32())) { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 241 | // int32 -> float64 -> float32 |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 242 | op = machine()->ChangeInt32ToFloat64(); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 243 | node = jsgraph()->graph()->NewNode(op, node); |
| 244 | op = machine()->TruncateFloat64ToFloat32(); |
| 245 | } else if (output_type->Is(Type::Unsigned32()) || |
| 246 | truncation.TruncatesToWord32()) { |
| 247 | // Either the output is uint32 or the uses only care about the |
| 248 | // low 32 bits (so we can pick uint32 safely). |
| 249 | |
| 250 | // uint32 -> float64 -> float32 |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 251 | op = machine()->ChangeUint32ToFloat64(); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 252 | node = jsgraph()->graph()->NewNode(op, node); |
| 253 | op = machine()->TruncateFloat64ToFloat32(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 254 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 255 | } else if (output_rep == MachineRepresentation::kTagged) { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 256 | if (output_type->Is(Type::Number())) { |
| 257 | op = simplified() |
| 258 | ->ChangeTaggedToFloat64(); // tagged -> float64 -> float32 |
| 259 | node = jsgraph()->graph()->NewNode(op, node); |
| 260 | op = machine()->TruncateFloat64ToFloat32(); |
| 261 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 262 | } else if (output_rep == MachineRepresentation::kFloat64) { |
| 263 | op = machine()->TruncateFloat64ToFloat32(); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 264 | } |
| 265 | if (op == nullptr) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 266 | return TypeError(node, output_rep, output_type, |
| 267 | MachineRepresentation::kFloat32); |
| 268 | } |
| 269 | return jsgraph()->graph()->NewNode(op, node); |
| 270 | } |
| 271 | |
| 272 | |
| 273 | Node* RepresentationChanger::GetFloat64RepresentationFor( |
| 274 | Node* node, MachineRepresentation output_rep, Type* output_type, |
| 275 | Truncation truncation) { |
| 276 | // Eagerly fold representation changes for constants. |
| 277 | switch (node->opcode()) { |
| 278 | case IrOpcode::kNumberConstant: |
| 279 | return jsgraph()->Float64Constant(OpParameter<double>(node)); |
| 280 | case IrOpcode::kInt32Constant: |
| 281 | if (output_type->Is(Type::Signed32())) { |
| 282 | int32_t value = OpParameter<int32_t>(node); |
| 283 | return jsgraph()->Float64Constant(value); |
| 284 | } else { |
| 285 | DCHECK(output_type->Is(Type::Unsigned32())); |
| 286 | uint32_t value = static_cast<uint32_t>(OpParameter<int32_t>(node)); |
| 287 | return jsgraph()->Float64Constant(static_cast<double>(value)); |
| 288 | } |
| 289 | case IrOpcode::kFloat64Constant: |
| 290 | return node; // No change necessary. |
| 291 | case IrOpcode::kFloat32Constant: |
| 292 | return jsgraph()->Float64Constant(OpParameter<float>(node)); |
| 293 | default: |
| 294 | break; |
| 295 | } |
| 296 | // Select the correct X -> Float64 operator. |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 297 | const Operator* op = nullptr; |
| 298 | if (IsWord(output_rep)) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 299 | if (output_type->Is(Type::Signed32())) { |
| 300 | op = machine()->ChangeInt32ToFloat64(); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 301 | } else if (output_type->Is(Type::Unsigned32()) || |
| 302 | truncation.TruncatesToWord32()) { |
| 303 | // Either the output is uint32 or the uses only care about the |
| 304 | // low 32 bits (so we can pick uint32 safely). |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 305 | op = machine()->ChangeUint32ToFloat64(); |
| 306 | } |
| 307 | } else if (output_rep == MachineRepresentation::kTagged) { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 308 | if (output_type->Is(Type::Number())) { |
| 309 | op = simplified()->ChangeTaggedToFloat64(); |
| 310 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 311 | } else if (output_rep == MachineRepresentation::kFloat32) { |
| 312 | op = machine()->ChangeFloat32ToFloat64(); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 313 | } |
| 314 | if (op == nullptr) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 315 | return TypeError(node, output_rep, output_type, |
| 316 | MachineRepresentation::kFloat64); |
| 317 | } |
| 318 | return jsgraph()->graph()->NewNode(op, node); |
| 319 | } |
| 320 | |
| 321 | |
| 322 | Node* RepresentationChanger::MakeTruncatedInt32Constant(double value) { |
| 323 | return jsgraph()->Int32Constant(DoubleToInt32(value)); |
| 324 | } |
| 325 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 326 | Node* RepresentationChanger::GetWord32RepresentationFor( |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 327 | Node* node, MachineRepresentation output_rep, Type* output_type, |
| 328 | Truncation truncation) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 329 | // Eagerly fold representation changes for constants. |
| 330 | switch (node->opcode()) { |
| 331 | case IrOpcode::kInt32Constant: |
| 332 | return node; // No change necessary. |
| 333 | case IrOpcode::kFloat32Constant: |
| 334 | return MakeTruncatedInt32Constant(OpParameter<float>(node)); |
| 335 | case IrOpcode::kNumberConstant: |
| 336 | case IrOpcode::kFloat64Constant: |
| 337 | return MakeTruncatedInt32Constant(OpParameter<double>(node)); |
| 338 | default: |
| 339 | break; |
| 340 | } |
| 341 | // Select the correct X -> Word32 operator. |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 342 | const Operator* op = nullptr; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 343 | if (output_rep == MachineRepresentation::kBit) { |
| 344 | return node; // Sloppy comparison -> word32 |
| 345 | } else if (output_rep == MachineRepresentation::kFloat64) { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 346 | if (output_type->Is(Type::Unsigned32())) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 347 | op = machine()->ChangeFloat64ToUint32(); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 348 | } else if (output_type->Is(Type::Signed32())) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 349 | op = machine()->ChangeFloat64ToInt32(); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 350 | } else if (truncation.TruncatesToWord32()) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 351 | op = machine()->TruncateFloat64ToInt32(TruncationMode::kJavaScript); |
| 352 | } |
| 353 | } else if (output_rep == MachineRepresentation::kFloat32) { |
| 354 | node = InsertChangeFloat32ToFloat64(node); // float32 -> float64 -> int32 |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 355 | if (output_type->Is(Type::Unsigned32())) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 356 | op = machine()->ChangeFloat64ToUint32(); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 357 | } else if (output_type->Is(Type::Signed32())) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 358 | op = machine()->ChangeFloat64ToInt32(); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 359 | } else if (truncation.TruncatesToWord32()) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 360 | op = machine()->TruncateFloat64ToInt32(TruncationMode::kJavaScript); |
| 361 | } |
| 362 | } else if (output_rep == MachineRepresentation::kTagged) { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 363 | if (output_type->Is(Type::Unsigned32())) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 364 | op = simplified()->ChangeTaggedToUint32(); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 365 | } else if (output_type->Is(Type::Signed32())) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 366 | op = simplified()->ChangeTaggedToInt32(); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 367 | } else if (truncation.TruncatesToWord32()) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 368 | node = InsertChangeTaggedToFloat64(node); |
| 369 | op = machine()->TruncateFloat64ToInt32(TruncationMode::kJavaScript); |
| 370 | } |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 371 | } |
| 372 | if (op == nullptr) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 373 | return TypeError(node, output_rep, output_type, |
| 374 | MachineRepresentation::kWord32); |
| 375 | } |
| 376 | return jsgraph()->graph()->NewNode(op, node); |
| 377 | } |
| 378 | |
| 379 | |
| 380 | Node* RepresentationChanger::GetBitRepresentationFor( |
| 381 | Node* node, MachineRepresentation output_rep, Type* output_type) { |
| 382 | // Eagerly fold representation changes for constants. |
| 383 | switch (node->opcode()) { |
| 384 | case IrOpcode::kHeapConstant: { |
| 385 | Handle<HeapObject> value = OpParameter<Handle<HeapObject>>(node); |
| 386 | DCHECK(value.is_identical_to(factory()->true_value()) || |
| 387 | value.is_identical_to(factory()->false_value())); |
| 388 | return jsgraph()->Int32Constant( |
| 389 | value.is_identical_to(factory()->true_value()) ? 1 : 0); |
| 390 | } |
| 391 | default: |
| 392 | break; |
| 393 | } |
| 394 | // Select the correct X -> Bit operator. |
| 395 | const Operator* op; |
| 396 | if (output_rep == MachineRepresentation::kTagged) { |
| 397 | op = simplified()->ChangeBoolToBit(); |
| 398 | } else { |
| 399 | return TypeError(node, output_rep, output_type, |
| 400 | MachineRepresentation::kBit); |
| 401 | } |
| 402 | return jsgraph()->graph()->NewNode(op, node); |
| 403 | } |
| 404 | |
| 405 | |
| 406 | Node* RepresentationChanger::GetWord64RepresentationFor( |
| 407 | Node* node, MachineRepresentation output_rep, Type* output_type) { |
| 408 | if (output_rep == MachineRepresentation::kBit) { |
| 409 | return node; // Sloppy comparison -> word64 |
| 410 | } |
| 411 | // Can't really convert Word64 to anything else. Purported to be internal. |
| 412 | return TypeError(node, output_rep, output_type, |
| 413 | MachineRepresentation::kWord64); |
| 414 | } |
| 415 | |
| 416 | |
| 417 | const Operator* RepresentationChanger::Int32OperatorFor( |
| 418 | IrOpcode::Value opcode) { |
| 419 | switch (opcode) { |
| 420 | case IrOpcode::kNumberAdd: |
| 421 | return machine()->Int32Add(); |
| 422 | case IrOpcode::kNumberSubtract: |
| 423 | return machine()->Int32Sub(); |
| 424 | case IrOpcode::kNumberMultiply: |
| 425 | return machine()->Int32Mul(); |
| 426 | case IrOpcode::kNumberDivide: |
| 427 | return machine()->Int32Div(); |
| 428 | case IrOpcode::kNumberModulus: |
| 429 | return machine()->Int32Mod(); |
| 430 | case IrOpcode::kNumberBitwiseOr: |
| 431 | return machine()->Word32Or(); |
| 432 | case IrOpcode::kNumberBitwiseXor: |
| 433 | return machine()->Word32Xor(); |
| 434 | case IrOpcode::kNumberBitwiseAnd: |
| 435 | return machine()->Word32And(); |
| 436 | case IrOpcode::kNumberEqual: |
| 437 | return machine()->Word32Equal(); |
| 438 | case IrOpcode::kNumberLessThan: |
| 439 | return machine()->Int32LessThan(); |
| 440 | case IrOpcode::kNumberLessThanOrEqual: |
| 441 | return machine()->Int32LessThanOrEqual(); |
| 442 | default: |
| 443 | UNREACHABLE(); |
| 444 | return nullptr; |
| 445 | } |
| 446 | } |
| 447 | |
| 448 | |
| 449 | const Operator* RepresentationChanger::Uint32OperatorFor( |
| 450 | IrOpcode::Value opcode) { |
| 451 | switch (opcode) { |
| 452 | case IrOpcode::kNumberAdd: |
| 453 | return machine()->Int32Add(); |
| 454 | case IrOpcode::kNumberSubtract: |
| 455 | return machine()->Int32Sub(); |
| 456 | case IrOpcode::kNumberMultiply: |
| 457 | return machine()->Int32Mul(); |
| 458 | case IrOpcode::kNumberDivide: |
| 459 | return machine()->Uint32Div(); |
| 460 | case IrOpcode::kNumberModulus: |
| 461 | return machine()->Uint32Mod(); |
| 462 | case IrOpcode::kNumberEqual: |
| 463 | return machine()->Word32Equal(); |
| 464 | case IrOpcode::kNumberLessThan: |
| 465 | return machine()->Uint32LessThan(); |
| 466 | case IrOpcode::kNumberLessThanOrEqual: |
| 467 | return machine()->Uint32LessThanOrEqual(); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 468 | case IrOpcode::kNumberClz32: |
| 469 | return machine()->Word32Clz(); |
| 470 | case IrOpcode::kNumberImul: |
| 471 | return machine()->Int32Mul(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 472 | default: |
| 473 | UNREACHABLE(); |
| 474 | return nullptr; |
| 475 | } |
| 476 | } |
| 477 | |
| 478 | |
| 479 | const Operator* RepresentationChanger::Float64OperatorFor( |
| 480 | IrOpcode::Value opcode) { |
| 481 | switch (opcode) { |
| 482 | case IrOpcode::kNumberAdd: |
| 483 | return machine()->Float64Add(); |
| 484 | case IrOpcode::kNumberSubtract: |
| 485 | return machine()->Float64Sub(); |
| 486 | case IrOpcode::kNumberMultiply: |
| 487 | return machine()->Float64Mul(); |
| 488 | case IrOpcode::kNumberDivide: |
| 489 | return machine()->Float64Div(); |
| 490 | case IrOpcode::kNumberModulus: |
| 491 | return machine()->Float64Mod(); |
| 492 | case IrOpcode::kNumberEqual: |
| 493 | return machine()->Float64Equal(); |
| 494 | case IrOpcode::kNumberLessThan: |
| 495 | return machine()->Float64LessThan(); |
| 496 | case IrOpcode::kNumberLessThanOrEqual: |
| 497 | return machine()->Float64LessThanOrEqual(); |
| 498 | default: |
| 499 | UNREACHABLE(); |
| 500 | return nullptr; |
| 501 | } |
| 502 | } |
| 503 | |
| 504 | |
| 505 | Node* RepresentationChanger::TypeError(Node* node, |
| 506 | MachineRepresentation output_rep, |
| 507 | Type* output_type, |
| 508 | MachineRepresentation use) { |
| 509 | type_error_ = true; |
| 510 | if (!testing_type_errors_) { |
| 511 | std::ostringstream out_str; |
| 512 | out_str << output_rep << " ("; |
| 513 | output_type->PrintTo(out_str, Type::SEMANTIC_DIM); |
| 514 | out_str << ")"; |
| 515 | |
| 516 | std::ostringstream use_str; |
| 517 | use_str << use; |
| 518 | |
| 519 | V8_Fatal(__FILE__, __LINE__, |
| 520 | "RepresentationChangerError: node #%d:%s of " |
| 521 | "%s cannot be changed to %s", |
| 522 | node->id(), node->op()->mnemonic(), out_str.str().c_str(), |
| 523 | use_str.str().c_str()); |
| 524 | } |
| 525 | return node; |
| 526 | } |
| 527 | |
| 528 | |
| 529 | Node* RepresentationChanger::InsertChangeFloat32ToFloat64(Node* node) { |
| 530 | return jsgraph()->graph()->NewNode(machine()->ChangeFloat32ToFloat64(), node); |
| 531 | } |
| 532 | |
| 533 | |
| 534 | Node* RepresentationChanger::InsertChangeTaggedToFloat64(Node* node) { |
| 535 | return jsgraph()->graph()->NewNode(simplified()->ChangeTaggedToFloat64(), |
| 536 | node); |
| 537 | } |
| 538 | |
| 539 | } // namespace compiler |
| 540 | } // namespace internal |
| 541 | } // namespace v8 |