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

Issue 896653008: Move nested classes of AstGraphBuilder into cc file. (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@local_trycatch-2
Patch Set: Created 5 years, 10 months ago
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1 // Copyright 2014 the V8 project authors. All rights reserved. 1 // Copyright 2014 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_AST_GRAPH_BUILDER_H_ 5 #ifndef V8_COMPILER_AST_GRAPH_BUILDER_H_
6 #define V8_COMPILER_AST_GRAPH_BUILDER_H_ 6 #define V8_COMPILER_AST_GRAPH_BUILDER_H_
7 7
8 #include "src/v8.h" 8 #include "src/v8.h"
9 9
10 #include "src/ast.h" 10 #include "src/ast.h"
(...skipping 106 matching lines...) Expand 10 before | Expand all | Expand 10 after
117 ControlScope* execution_control() const { return execution_control_; } 117 ControlScope* execution_control() const { return execution_control_; }
118 ContextScope* execution_context() const { return execution_context_; } 118 ContextScope* execution_context() const { return execution_context_; }
119 CommonOperatorBuilder* common() const { return jsgraph_->common(); } 119 CommonOperatorBuilder* common() const { return jsgraph_->common(); }
120 CompilationInfo* info() const { return info_; } 120 CompilationInfo* info() const { return info_; }
121 StrictMode strict_mode() const; 121 StrictMode strict_mode() const;
122 JSGraph* jsgraph() { return jsgraph_; } 122 JSGraph* jsgraph() { return jsgraph_; }
123 Graph* graph() { return jsgraph_->graph(); } 123 Graph* graph() { return jsgraph_->graph(); }
124 Zone* graph_zone() { return graph()->zone(); } 124 Zone* graph_zone() { return graph()->zone(); }
125 JSOperatorBuilder* javascript() { return jsgraph_->javascript(); } 125 JSOperatorBuilder* javascript() { return jsgraph_->javascript(); }
126 ZoneVector<Handle<Object>>* globals() { return &globals_; } 126 ZoneVector<Handle<Object>>* globals() { return &globals_; }
127 inline Scope* current_scope() const; 127 Scope* current_scope() const;
128 Node* current_context() const { return current_context_; } 128 Node* current_context() const { return current_context_; }
129 Node* dead_control(); 129 Node* dead_control();
130 Node* exit_control() const { return exit_control_; } 130 Node* exit_control() const { return exit_control_; }
131 131
132 void set_environment(Environment* env) { environment_ = env; }
132 void set_ast_context(AstContext* ctx) { ast_context_ = ctx; } 133 void set_ast_context(AstContext* ctx) { ast_context_ = ctx; }
133 void set_execution_control(ControlScope* ctrl) { execution_control_ = ctrl; } 134 void set_execution_control(ControlScope* ctrl) { execution_control_ = ctrl; }
134 void set_execution_context(ContextScope* ctx) { execution_context_ = ctx; } 135 void set_execution_context(ContextScope* ctx) { execution_context_ = ctx; }
136 void set_current_context(Node* ctx) { current_context_ = ctx; }
135 void set_exit_control(Node* exit) { exit_control_ = exit; } 137 void set_exit_control(Node* exit) { exit_control_ = exit; }
136 void set_current_context(Node* ctx) { current_context_ = ctx; }
137 void set_environment(Environment* env) { environment_ = env; }
138 138
139 // Node creation helpers. 139 // Node creation helpers.
140 Node* NewNode(const Operator* op, bool incomplete = false) { 140 Node* NewNode(const Operator* op, bool incomplete = false) {
141 return MakeNode(op, 0, static_cast<Node**>(NULL), incomplete); 141 return MakeNode(op, 0, static_cast<Node**>(NULL), incomplete);
142 } 142 }
143 143
144 Node* NewNode(const Operator* op, Node* n1) { 144 Node* NewNode(const Operator* op, Node* n1) {
145 return MakeNode(op, 1, &n1, false); 145 return MakeNode(op, 1, &n1, false);
146 } 146 }
147 147
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450 Zone* zone() const { return builder_->local_zone(); } 450 Zone* zone() const { return builder_->local_zone(); }
451 Graph* graph() const { return builder_->graph(); } 451 Graph* graph() const { return builder_->graph(); }
452 AstGraphBuilder* builder() const { return builder_; } 452 AstGraphBuilder* builder() const { return builder_; }
453 CommonOperatorBuilder* common() { return builder_->common(); } 453 CommonOperatorBuilder* common() { return builder_->common(); }
454 NodeVector* values() { return &values_; } 454 NodeVector* values() { return &values_; }
455 455
456 // Prepare environment to be used as loop header. 456 // Prepare environment to be used as loop header.
457 void PrepareForLoop(BitVector* assigned, bool is_osr = false); 457 void PrepareForLoop(BitVector* assigned, bool is_osr = false);
458 }; 458 };
459 459
460
461 // Each expression in the AST is evaluated in a specific context. This context
462 // decides how the evaluation result is passed up the visitor.
463 class AstGraphBuilder::AstContext BASE_EMBEDDED {
464 public:
465 bool IsEffect() const { return kind_ == Expression::kEffect; }
466 bool IsValue() const { return kind_ == Expression::kValue; }
467 bool IsTest() const { return kind_ == Expression::kTest; }
468
469 // Determines how to combine the frame state with the value
470 // that is about to be plugged into this AstContext.
471 OutputFrameStateCombine GetStateCombine() {
472 return IsEffect() ? OutputFrameStateCombine::Ignore()
473 : OutputFrameStateCombine::Push();
474 }
475
476 // Plug a node into this expression context. Call this function in tail
477 // position in the Visit functions for expressions.
478 virtual void ProduceValue(Node* value) = 0;
479
480 // Unplugs a node from this expression context. Call this to retrieve the
481 // result of another Visit function that already plugged the context.
482 virtual Node* ConsumeValue() = 0;
483
484 // Shortcut for "context->ProduceValue(context->ConsumeValue())".
485 void ReplaceValue() { ProduceValue(ConsumeValue()); }
486
487 protected:
488 AstContext(AstGraphBuilder* owner, Expression::Context kind);
489 virtual ~AstContext();
490
491 AstGraphBuilder* owner() const { return owner_; }
492 Environment* environment() const { return owner_->environment(); }
493
494 // We want to be able to assert, in a context-specific way, that the stack
495 // height makes sense when the context is filled.
496 #ifdef DEBUG
497 int original_height_;
498 #endif
499
500 private:
501 Expression::Context kind_;
502 AstGraphBuilder* owner_;
503 AstContext* outer_;
504 };
505
506
507 // Context to evaluate expression for its side effects only.
508 class AstGraphBuilder::AstEffectContext FINAL : public AstContext {
509 public:
510 explicit AstEffectContext(AstGraphBuilder* owner)
511 : AstContext(owner, Expression::kEffect) {}
512 ~AstEffectContext() FINAL;
513 void ProduceValue(Node* value) FINAL;
514 Node* ConsumeValue() FINAL;
515 };
516
517
518 // Context to evaluate expression for its value (and side effects).
519 class AstGraphBuilder::AstValueContext FINAL : public AstContext {
520 public:
521 explicit AstValueContext(AstGraphBuilder* owner)
522 : AstContext(owner, Expression::kValue) {}
523 ~AstValueContext() FINAL;
524 void ProduceValue(Node* value) FINAL;
525 Node* ConsumeValue() FINAL;
526 };
527
528
529 // Context to evaluate expression for a condition value (and side effects).
530 class AstGraphBuilder::AstTestContext FINAL : public AstContext {
531 public:
532 explicit AstTestContext(AstGraphBuilder* owner)
533 : AstContext(owner, Expression::kTest) {}
534 ~AstTestContext() FINAL;
535 void ProduceValue(Node* value) FINAL;
536 Node* ConsumeValue() FINAL;
537 };
538
539
540 // Scoped class tracking context objects created by the visitor. Represents
541 // mutations of the context chain within the function body and allows to
542 // change the current {scope} and {context} during visitation.
543 class AstGraphBuilder::ContextScope BASE_EMBEDDED {
544 public:
545 ContextScope(AstGraphBuilder* owner, Scope* scope, Node* context)
546 : owner_(owner),
547 next_(owner->execution_context()),
548 outer_(owner->current_context()),
549 scope_(scope) {
550 owner_->set_execution_context(this); // Push.
551 owner_->set_current_context(context);
552 }
553
554 ~ContextScope() {
555 owner_->set_execution_context(next_); // Pop.
556 owner_->set_current_context(outer_);
557 }
558
559 // Current scope during visitation.
560 Scope* scope() const { return scope_; }
561
562 private:
563 AstGraphBuilder* owner_;
564 ContextScope* next_;
565 Node* outer_;
566 Scope* scope_;
567 };
568
569 Scope* AstGraphBuilder::current_scope() const {
570 return execution_context_->scope();
571 }
572
573 } // namespace compiler 460 } // namespace compiler
574 } // namespace internal 461 } // namespace internal
575 } // namespace v8 462 } // namespace v8
576 463
577 #endif // V8_COMPILER_AST_GRAPH_BUILDER_H_ 464 #endif // V8_COMPILER_AST_GRAPH_BUILDER_H_
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