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1 // Copyright 2016 the V8 project authors. All rights reserved. | 1 // Copyright 2016 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "src/interpreter/bytecode-peephole-optimizer.h" | 5 #include "src/interpreter/bytecode-peephole-optimizer.h" |
6 | 6 |
7 #include "src/objects-inl.h" | 7 #include "src/objects-inl.h" |
8 #include "src/objects.h" | 8 #include "src/objects.h" |
9 | 9 |
10 namespace v8 { | 10 namespace v8 { |
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131 BytecodeNode* const last, | 131 BytecodeNode* const last, |
132 BytecodeNode* const current) { | 132 BytecodeNode* const current) { |
133 DCHECK_EQ(last->bytecode(), Bytecode::kLdaZero); | 133 DCHECK_EQ(last->bytecode(), Bytecode::kLdaZero); |
134 current->set_bytecode(new_bytecode, 0, current->operand(0), | 134 current->set_bytecode(new_bytecode, 0, current->operand(0), |
135 current->operand(1)); | 135 current->operand(1)); |
136 if (last->source_info().is_valid()) { | 136 if (last->source_info().is_valid()) { |
137 current->set_source_info(last->source_info()); | 137 current->set_source_info(last->source_info()); |
138 } | 138 } |
139 } | 139 } |
140 | 140 |
141 void TransformEqualityWithNullOrUndefinedToTestUndetectable( | |
142 BytecodeNode* const last, BytecodeNode* const current) { | |
143 DCHECK((last->bytecode() == Bytecode::kLdaNull) || | |
144 (last->bytecode() == Bytecode::kLdaUndefined)); | |
rmcilroy
2016/12/05 19:08:09
Do you want to DCHECK that this current bytecode i
mythria
2016/12/06 10:13:27
Done.
| |
145 current->set_bytecode(Bytecode::kTestUndetectable, current->operand(0)); | |
146 if (last->source_info().is_valid()) { | |
147 current->set_source_info(last->source_info()); | |
148 } | |
149 } | |
150 | |
141 } // namespace | 151 } // namespace |
142 | 152 |
143 void BytecodePeepholeOptimizer::DefaultAction( | 153 void BytecodePeepholeOptimizer::DefaultAction( |
144 BytecodeNode* const node, const PeepholeActionAndData* action_data) { | 154 BytecodeNode* const node, const PeepholeActionAndData* action_data) { |
145 DCHECK(LastIsValid()); | 155 DCHECK(LastIsValid()); |
146 DCHECK(!Bytecodes::IsJump(node->bytecode())); | 156 DCHECK(!Bytecodes::IsJump(node->bytecode())); |
147 | 157 |
148 next_stage()->Write(last()); | 158 next_stage()->Write(last()); |
149 SetLast(node); | 159 SetLast(node); |
150 } | 160 } |
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244 if (!node->source_info().is_valid() || !last()->source_info().is_valid()) { | 254 if (!node->source_info().is_valid() || !last()->source_info().is_valid()) { |
245 // Fused last and current into current. | 255 // Fused last and current into current. |
246 TransformLdaZeroBinaryOpToBinaryOpWithZero(action_data->bytecode, last(), | 256 TransformLdaZeroBinaryOpToBinaryOpWithZero(action_data->bytecode, last(), |
247 node); | 257 node); |
248 SetLast(node); | 258 SetLast(node); |
249 } else { | 259 } else { |
250 DefaultAction(node); | 260 DefaultAction(node); |
251 } | 261 } |
252 } | 262 } |
253 | 263 |
264 void BytecodePeepholeOptimizer:: | |
265 TransformEqualityWithNullOrUndefinedToTestUndetectableAction( | |
266 BytecodeNode* const node, const PeepholeActionAndData* action_data) { | |
267 DCHECK(LastIsValid()); | |
268 DCHECK(!Bytecodes::IsJump(node->bytecode())); | |
269 // Fused last and current into current. | |
270 TransformEqualityWithNullOrUndefinedToTestUndetectable(last(), node); | |
271 SetLast(node); | |
272 } | |
273 | |
254 void BytecodePeepholeOptimizer::DefaultJumpAction( | 274 void BytecodePeepholeOptimizer::DefaultJumpAction( |
255 BytecodeNode* const node, const PeepholeActionAndData* action_data) { | 275 BytecodeNode* const node, const PeepholeActionAndData* action_data) { |
256 DCHECK(LastIsValid()); | 276 DCHECK(LastIsValid()); |
257 DCHECK(Bytecodes::IsJump(node->bytecode())); | 277 DCHECK(Bytecodes::IsJump(node->bytecode())); |
258 | 278 |
259 next_stage()->Write(last()); | 279 next_stage()->Write(last()); |
260 InvalidateLast(); | 280 InvalidateLast(); |
261 } | 281 } |
262 | 282 |
263 void BytecodePeepholeOptimizer::UpdateLastJumpAction( | 283 void BytecodePeepholeOptimizer::UpdateLastJumpAction( |
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306 #undef CASE | 326 #undef CASE |
307 default: | 327 default: |
308 UNREACHABLE(); | 328 UNREACHABLE(); |
309 break; | 329 break; |
310 } | 330 } |
311 } | 331 } |
312 | 332 |
313 } // namespace interpreter | 333 } // namespace interpreter |
314 } // namespace internal | 334 } // namespace internal |
315 } // namespace v8 | 335 } // namespace v8 |
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