llvm/llvm/lib/Transforms/Vectorize/VPlanUtils.h

//===- VPlanUtils.h - VPlan-related utilities -------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_TRANSFORMS_VECTORIZE_VPLANUTILS_H
#define LLVM_TRANSFORMS_VECTORIZE_VPLANUTILS_H

#include "VPlan.h"

namespace llvm::vputils {
/// Returns true if only the first lane of \p Def is used.
bool onlyFirstLaneUsed(const VPValue *Def);

/// Returns true if only the first part of \p Def is used.
bool onlyFirstPartUsed(const VPValue *Def);

/// Get or create a VPValue that corresponds to the expansion of \p Expr. If \p
/// Expr is a SCEVConstant or SCEVUnknown, return a VPValue wrapping the live-in
/// value. Otherwise return a VPExpandSCEVRecipe to expand \p Expr. If \p Plan's
/// pre-header already contains a recipe expanding \p Expr, return it. If not,
/// create a new one.
VPValue *getOrCreateVPValueForSCEVExpr(VPlan &Plan, const SCEV *Expr,
                                       ScalarEvolution &SE);

/// Returns true if \p VPV is uniform after vectorization.
inline bool isUniformAfterVectorization(const VPValue *VPV) { … }

/// Return true if \p V is a header mask in \p Plan.
bool isHeaderMask(const VPValue *V, VPlan &Plan);
} // end namespace llvm::vputils

#endif