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//===--- PhiStorageOptimizer.h - Phi storage optimizer --------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2021 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
///
/// This file defines PhiStorageOptimizer, a utility for use with the
/// mandatory AddressLowering pass.
///
//===----------------------------------------------------------------------===//
#include "AddressLowering.h"
#include "swift/SIL/SILArgument.h"
#include "swift/SIL/SILBasicBlock.h"
#include "swift/SIL/SILValue.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/ADT/SmallVector.h"
namespace swift {
class DominanceInfo;
class CoalescedPhi {
friend class PhiStorageOptimizer;
SmallVector<Operand *, 4> coalescedOperands;
CoalescedPhi(const CoalescedPhi &) = delete;
CoalescedPhi &operator=(const CoalescedPhi &) = delete;
public:
CoalescedPhi() = default;
CoalescedPhi(CoalescedPhi &&) = default;
CoalescedPhi &operator=(CoalescedPhi &&) = default;
void coalesce(PhiValue phi, const ValueStorageMap &valueStorageMap,
DominanceInfo *domInfo);
bool empty() const { return coalescedOperands.empty(); }
ArrayRef<Operand *> getCoalescedOperands() const { return coalescedOperands; }
SILInstruction::OperandValueRange getCoalescedValues() const {
return SILInstruction::getOperandValues(getCoalescedOperands());
}
};
} // namespace swift
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