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Side by Side Diff: src/compiler/bytecode-graph-builder.h

Issue 2465913002: [turbofan] Move OSR BailoutId translation into graph builder. (Closed)
Patch Set: Addressed comments. Created 4 years ago
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1 // Copyright 2015 the V8 project authors. All rights reserved. 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 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 #ifndef V8_COMPILER_BYTECODE_GRAPH_BUILDER_H_ 5 #ifndef V8_COMPILER_BYTECODE_GRAPH_BUILDER_H_
6 #define V8_COMPILER_BYTECODE_GRAPH_BUILDER_H_ 6 #define V8_COMPILER_BYTECODE_GRAPH_BUILDER_H_
7 7
8 #include "src/compiler/bytecode-analysis.h" 8 #include "src/compiler/bytecode-analysis.h"
9 #include "src/compiler/js-graph.h" 9 #include "src/compiler/js-graph.h"
10 #include "src/compiler/liveness-analyzer.h" 10 #include "src/compiler/liveness-analyzer.h"
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197 197
198 // Builds loop exit nodes for every exited loop between the current bytecode 198 // Builds loop exit nodes for every exited loop between the current bytecode
199 // offset and {target_offset}. 199 // offset and {target_offset}.
200 void BuildLoopExitsForBranch(int target_offset); 200 void BuildLoopExitsForBranch(int target_offset);
201 void BuildLoopExitsForFunctionExit(); 201 void BuildLoopExitsForFunctionExit();
202 void BuildLoopExitsUntilLoop(int loop_offset); 202 void BuildLoopExitsUntilLoop(int loop_offset);
203 203
204 // Simulates entry and exit of exception handlers. 204 // Simulates entry and exit of exception handlers.
205 void EnterAndExitExceptionHandlers(int current_offset); 205 void EnterAndExitExceptionHandlers(int current_offset);
206 206
207 // Update the current position of the {SourcePositionTable} to that of the
208 // bytecode at {offset}, if any.
209 void UpdateCurrentSourcePosition(SourcePositionTableIterator* it, int offset);
210
207 // Growth increment for the temporary buffer used to construct input lists to 211 // Growth increment for the temporary buffer used to construct input lists to
208 // new nodes. 212 // new nodes.
209 static const int kInputBufferSizeIncrement = 64; 213 static const int kInputBufferSizeIncrement = 64;
210 214
211 // An abstract representation for an exception handler that is being 215 // An abstract representation for an exception handler that is being
212 // entered and exited while the graph builder is iterating over the 216 // entered and exited while the graph builder is iterating over the
213 // underlying bytecode. The exception handlers within the bytecode are 217 // underlying bytecode. The exception handlers within the bytecode are
214 // well scoped, hence will form a stack during iteration. 218 // well scoped, hence will form a stack during iteration.
215 struct ExceptionHandler { 219 struct ExceptionHandler {
216 int start_offset_; // Start offset of the handled area in the bytecode. 220 int start_offset_; // Start offset of the handled area in the bytecode.
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268 JSGraph* jsgraph_; 272 JSGraph* jsgraph_;
269 float const invocation_frequency_; 273 float const invocation_frequency_;
270 Handle<BytecodeArray> bytecode_array_; 274 Handle<BytecodeArray> bytecode_array_;
271 Handle<HandlerTable> exception_handler_table_; 275 Handle<HandlerTable> exception_handler_table_;
272 Handle<TypeFeedbackVector> feedback_vector_; 276 Handle<TypeFeedbackVector> feedback_vector_;
273 const FrameStateFunctionInfo* frame_state_function_info_; 277 const FrameStateFunctionInfo* frame_state_function_info_;
274 const interpreter::BytecodeArrayIterator* bytecode_iterator_; 278 const interpreter::BytecodeArrayIterator* bytecode_iterator_;
275 const BytecodeAnalysis* bytecode_analysis_; 279 const BytecodeAnalysis* bytecode_analysis_;
276 Environment* environment_; 280 Environment* environment_;
277 BailoutId osr_ast_id_; 281 BailoutId osr_ast_id_;
282 int osr_loop_offset_;
278 283
279 // Merge environments are snapshots of the environment at points where the 284 // Merge environments are snapshots of the environment at points where the
280 // control flow merges. This models a forward data flow propagation of all 285 // control flow merges. This models a forward data flow propagation of all
281 // values from all predecessors of the merge in question. 286 // values from all predecessors of the merge in question.
282 ZoneMap<int, Environment*> merge_environments_; 287 ZoneMap<int, Environment*> merge_environments_;
283 288
284 // Exception handlers currently entered by the iteration. 289 // Exception handlers currently entered by the iteration.
285 ZoneStack<ExceptionHandler> exception_handlers_; 290 ZoneStack<ExceptionHandler> exception_handlers_;
286 int current_exception_handler_; 291 int current_exception_handler_;
287 292
288 // Temporary storage for building node input lists. 293 // Temporary storage for building node input lists.
289 int input_buffer_size_; 294 int input_buffer_size_;
290 Node** input_buffer_; 295 Node** input_buffer_;
291 296
292 // Nodes representing values in the activation record. 297 // Nodes representing values in the activation record.
293 SetOncePointer<Node> function_context_; 298 SetOncePointer<Node> function_context_;
294 SetOncePointer<Node> function_closure_; 299 SetOncePointer<Node> function_closure_;
295 SetOncePointer<Node> new_target_; 300 SetOncePointer<Node> new_target_;
296 301
297 // Control nodes that exit the function body. 302 // Control nodes that exit the function body.
298 ZoneVector<Node*> exit_controls_; 303 ZoneVector<Node*> exit_controls_;
299 304
300 bool const is_liveness_analysis_enabled_; 305 bool const is_liveness_analysis_enabled_;
301 306
302 StateValuesCache state_values_cache_; 307 StateValuesCache state_values_cache_;
303 308
304 // The Turbofan source position table, to be populated. 309 // The source position table, to be populated.
305 SourcePositionTable* source_positions_; 310 SourcePositionTable* source_positions_;
306 311
307 SourcePosition const start_position_; 312 SourcePosition const start_position_;
308 313
309 // Update [source_positions_]'s current position to that of the bytecode at
310 // [offset], if any.
311 void UpdateCurrentSourcePosition(SourcePositionTableIterator* it, int offset);
312
313 static int const kBinaryOperationHintIndex = 1; 314 static int const kBinaryOperationHintIndex = 1;
314 static int const kCountOperationHintIndex = 0; 315 static int const kCountOperationHintIndex = 0;
315 static int const kBinaryOperationSmiHintIndex = 2; 316 static int const kBinaryOperationSmiHintIndex = 2;
316 317
317 DISALLOW_COPY_AND_ASSIGN(BytecodeGraphBuilder); 318 DISALLOW_COPY_AND_ASSIGN(BytecodeGraphBuilder);
318 }; 319 };
319 320
320 } // namespace compiler 321 } // namespace compiler
321 } // namespace internal 322 } // namespace internal
322 } // namespace v8 323 } // namespace v8
323 324
324 #endif // V8_COMPILER_BYTECODE_GRAPH_BUILDER_H_ 325 #endif // V8_COMPILER_BYTECODE_GRAPH_BUILDER_H_
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