// Copyright 2015 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef V8_COMPILER_FRAME_ELIDER_H_
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#define V8_COMPILER_FRAME_ELIDER_H_
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#include "src/compiler/instruction.h"
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namespace v8 {
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namespace internal {
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namespace compiler {
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// Determine which instruction blocks need a frame and where frames must be
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// constructed/deconstructed.
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class FrameElider {
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public:
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explicit FrameElider(InstructionSequence* code);
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void Run();
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private:
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void MarkBlocks();
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void PropagateMarks();
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void MarkDeConstruction();
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bool PropagateInOrder();
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bool PropagateReversed();
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bool PropagateIntoBlock(InstructionBlock* block);
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const InstructionBlocks& instruction_blocks() const;
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InstructionBlock* InstructionBlockAt(RpoNumber rpo_number) const;
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Instruction* InstructionAt(int index) const;
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InstructionSequence* const code_;
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};
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} // namespace compiler
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} // namespace internal
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} // namespace v8
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#endif // V8_COMPILER_FRAME_ELIDER_H_
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