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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: Created 4 years, 1 month 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-branch-analysis.h" 8 #include "src/compiler/bytecode-branch-analysis.h"
9 #include "src/compiler/bytecode-loop-analysis.h" 9 #include "src/compiler/bytecode-loop-analysis.h"
10 #include "src/compiler/js-graph.h" 10 #include "src/compiler/js-graph.h"
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198 198
199 // Builds loop exit nodes for every exited loop between the current bytecode 199 // Builds loop exit nodes for every exited loop between the current bytecode
200 // offset and {target_offset}. 200 // offset and {target_offset}.
201 void BuildLoopExitsForBranch(int target_offset); 201 void BuildLoopExitsForBranch(int target_offset);
202 void BuildLoopExitsForFunctionExit(); 202 void BuildLoopExitsForFunctionExit();
203 void BuildLoopExitsUntilLoop(int loop_offset); 203 void BuildLoopExitsUntilLoop(int loop_offset);
204 204
205 // Simulates entry and exit of exception handlers. 205 // Simulates entry and exit of exception handlers.
206 void EnterAndExitExceptionHandlers(int current_offset); 206 void EnterAndExitExceptionHandlers(int current_offset);
207 207
208 // Update [source_positions_]'s current position to that of the bytecode at
209 // [offset], if any.
Jarin 2016/10/31 14:59:39 Nit: above we seem to be using "{offset}" to refer
210 void UpdateCurrentSourcePosition(SourcePositionTableIterator* it, int offset);
211
208 // Growth increment for the temporary buffer used to construct input lists to 212 // Growth increment for the temporary buffer used to construct input lists to
209 // new nodes. 213 // new nodes.
210 static const int kInputBufferSizeIncrement = 64; 214 static const int kInputBufferSizeIncrement = 64;
211 215
212 // An abstract representation for an exception handler that is being 216 // An abstract representation for an exception handler that is being
213 // entered and exited while the graph builder is iterating over the 217 // entered and exited while the graph builder is iterating over the
214 // underlying bytecode. The exception handlers within the bytecode are 218 // underlying bytecode. The exception handlers within the bytecode are
215 // well scoped, hence will form a stack during iteration. 219 // well scoped, hence will form a stack during iteration.
216 struct ExceptionHandler { 220 struct ExceptionHandler {
217 int start_offset_; // Start offset of the handled area in the bytecode. 221 int start_offset_; // Start offset of the handled area in the bytecode.
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278 float const invocation_frequency_; 282 float const invocation_frequency_;
279 Handle<BytecodeArray> bytecode_array_; 283 Handle<BytecodeArray> bytecode_array_;
280 Handle<HandlerTable> exception_handler_table_; 284 Handle<HandlerTable> exception_handler_table_;
281 Handle<TypeFeedbackVector> feedback_vector_; 285 Handle<TypeFeedbackVector> feedback_vector_;
282 const FrameStateFunctionInfo* frame_state_function_info_; 286 const FrameStateFunctionInfo* frame_state_function_info_;
283 const interpreter::BytecodeArrayIterator* bytecode_iterator_; 287 const interpreter::BytecodeArrayIterator* bytecode_iterator_;
284 const BytecodeBranchAnalysis* branch_analysis_; 288 const BytecodeBranchAnalysis* branch_analysis_;
285 const BytecodeLoopAnalysis* loop_analysis_; 289 const BytecodeLoopAnalysis* loop_analysis_;
286 Environment* environment_; 290 Environment* environment_;
287 BailoutId osr_ast_id_; 291 BailoutId osr_ast_id_;
292 int osr_loop_offset_;
288 293
289 // Merge environments are snapshots of the environment at points where the 294 // Merge environments are snapshots of the environment at points where the
290 // control flow merges. This models a forward data flow propagation of all 295 // control flow merges. This models a forward data flow propagation of all
291 // values from all predecessors of the merge in question. 296 // values from all predecessors of the merge in question.
292 ZoneMap<int, Environment*> merge_environments_; 297 ZoneMap<int, Environment*> merge_environments_;
293 298
294 // Exception handlers currently entered by the iteration. 299 // Exception handlers currently entered by the iteration.
295 ZoneStack<ExceptionHandler> exception_handlers_; 300 ZoneStack<ExceptionHandler> exception_handlers_;
296 int current_exception_handler_; 301 int current_exception_handler_;
297 302
298 // Temporary storage for building node input lists. 303 // Temporary storage for building node input lists.
299 int input_buffer_size_; 304 int input_buffer_size_;
300 Node** input_buffer_; 305 Node** input_buffer_;
301 306
302 // Nodes representing values in the activation record. 307 // Nodes representing values in the activation record.
303 SetOncePointer<Node> function_context_; 308 SetOncePointer<Node> function_context_;
304 SetOncePointer<Node> function_closure_; 309 SetOncePointer<Node> function_closure_;
305 SetOncePointer<Node> new_target_; 310 SetOncePointer<Node> new_target_;
306 311
307 // Control nodes that exit the function body. 312 // Control nodes that exit the function body.
308 ZoneVector<Node*> exit_controls_; 313 ZoneVector<Node*> exit_controls_;
309 314
310 bool const is_liveness_analysis_enabled_; 315 bool const is_liveness_analysis_enabled_;
311 316
312 StateValuesCache state_values_cache_; 317 StateValuesCache state_values_cache_;
313 318
314 // Analyzer of register liveness. 319 // Analyzer of register liveness.
315 LivenessAnalyzer liveness_analyzer_; 320 LivenessAnalyzer liveness_analyzer_;
316 321
317 // The Turbofan source position table, to be populated. 322 // The source position table, to be populated.
318 SourcePositionTable* source_positions_; 323 SourcePositionTable* source_positions_;
319 324
320 // Update [source_positions_]'s current position to that of the bytecode at
321 // [offset], if any.
322 void UpdateCurrentSourcePosition(SourcePositionTableIterator* it, int offset);
323
324 static int const kBinaryOperationHintIndex = 1; 325 static int const kBinaryOperationHintIndex = 1;
325 static int const kCountOperationHintIndex = 0; 326 static int const kCountOperationHintIndex = 0;
326 static int const kBinaryOperationSmiHintIndex = 2; 327 static int const kBinaryOperationSmiHintIndex = 2;
327 328
328 DISALLOW_COPY_AND_ASSIGN(BytecodeGraphBuilder); 329 DISALLOW_COPY_AND_ASSIGN(BytecodeGraphBuilder);
329 }; 330 };
330 331
331 } // namespace compiler 332 } // namespace compiler
332 } // namespace internal 333 } // namespace internal
333 } // namespace v8 334 } // namespace v8
334 335
335 #endif // V8_COMPILER_BYTECODE_GRAPH_BUILDER_H_ 336 #endif // V8_COMPILER_BYTECODE_GRAPH_BUILDER_H_
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