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// Copyright 2015 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_COMPILER_JS_INLINING_HEURISTIC_H_
#define V8_COMPILER_JS_INLINING_HEURISTIC_H_
#include "src/compiler/js-inlining.h"
namespace v8 {
namespace internal {
namespace compiler {
class JSInliningHeuristic final : public AdvancedReducer {
public:
enum Mode { kGeneralInlining, kRestrictedInlining, kStressInlining };
JSInliningHeuristic(Editor* editor, Mode mode, Zone* local_zone,
CompilationInfo* info, JSGraph* jsgraph)
: AdvancedReducer(editor),
mode_(mode),
inliner_(editor, local_zone, info, jsgraph),
candidates_(local_zone),
seen_(local_zone),
info_(info) {}
Reduction Reduce(Node* node) final;
// Processes the list of candidates gathered while the reducer was running,
// and inlines call sites that the heuristic determines to be important.
void Finalize() final;
private:
struct Candidate {
Handle<JSFunction> function; // The call target being inlined.
Node* node; // The call site at which to inline.
int calls; // Number of times the call site was hit.
};
// Comparator for candidates.
struct CandidateCompare {
bool operator()(const Candidate& left, const Candidate& right) const;
};
// Candidates are kept in a sorted set of unique candidates.
typedef ZoneSet<Candidate, CandidateCompare> Candidates;
// Dumps candidates to console.
void PrintCandidates();
Mode const mode_;
JSInliner inliner_;
Candidates candidates_;
ZoneSet<NodeId> seen_;
CompilationInfo* info_;
int cumulative_count_ = 0;
};
} // namespace compiler
} // namespace internal
} // namespace v8
#endif // V8_COMPILER_JS_INLINING_HEURISTIC_H_
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