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// Copyright 2022 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef V8_COMMON_NODEOBSERVER_TESTER_H_
#define V8_COMMON_NODEOBSERVER_TESTER_H_
#include "src/compiler/node-observer.h"
#include "src/compiler/simplified-operator.h"
#include "src/objects/type-hints.h"
namespace v8 {
namespace internal {
namespace compiler {
// Helpers to test TurboFan compilation using the %ObserveNode intrinsic.
struct ObserveNodeScope {
public:
ObserveNodeScope(Isolate* isolate, NodeObserver* node_observer)
: isolate_(isolate) {
DCHECK_NOT_NULL(isolate_);
DCHECK_NULL(isolate_->node_observer());
isolate_->set_node_observer(node_observer);
}
~ObserveNodeScope() {
DCHECK_NOT_NULL(isolate_->node_observer());
// Checks that the code wrapped by %ObserveNode() was actually compiled in
// the test.
CHECK(isolate_->node_observer()->has_observed_changes());
isolate_->set_node_observer(nullptr);
}
private:
Isolate* isolate_;
};
class CreationObserver : public NodeObserver {
public:
explicit CreationObserver(std::function<void(const Node*)> handler)
: handler_(handler) {
DCHECK(handler_);
}
Observation OnNodeCreated(const Node* node) override {
handler_(node);
return Observation::kStop;
}
private:
std::function<void(const Node*)> handler_;
};
class ModificationObserver : public NodeObserver {
public:
explicit ModificationObserver(
std::function<void(const Node*)> on_created_handler,
std::function<NodeObserver::Observation(
const Node*, const ObservableNodeState& old_state)>
on_changed_handler)
: on_created_handler_(on_created_handler),
on_changed_handler_(on_changed_handler) {
DCHECK(on_created_handler_);
DCHECK(on_changed_handler_);
}
Observation OnNodeCreated(const Node* node) override {
on_created_handler_(node);
return Observation::kContinue;
}
Observation OnNodeChanged(const char* reducer_name, const Node* node,
const ObservableNodeState& old_state) override {
return on_changed_handler_(node, old_state);
}
private:
std::function<void(const Node*)> on_created_handler_;
std::function<NodeObserver::Observation(const Node*,
const ObservableNodeState& old_state)>
on_changed_handler_;
};
} // namespace compiler
} // namespace internal
} // namespace v8
#endif // V8_COMMON_NODEOBSERVER_TESTER_H_
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