llvm/llvm/include/llvm/CodeGen/GlobalISel/GISelKnownBits.h

//===- llvm/CodeGen/GlobalISel/GISelKnownBits.h ---------------*- 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
//
//===----------------------------------------------------------------------===//
/// \file
/// Provides analysis for querying information about KnownBits during GISel
/// passes.
///
//===----------------------------------------------------------------------===//

#ifndef LLVM_CODEGEN_GLOBALISEL_GISELKNOWNBITS_H
#define LLVM_CODEGEN_GLOBALISEL_GISELKNOWNBITS_H

#include "llvm/ADT/DenseMap.h"
#include "llvm/CodeGen/GlobalISel/GISelChangeObserver.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/Register.h"
#include "llvm/InitializePasses.h"
#include "llvm/Support/KnownBits.h"

namespace llvm {

class TargetLowering;
class DataLayout;

class GISelKnownBits : public GISelChangeObserver { … };

/// To use KnownBitsInfo analysis in a pass,
/// KnownBitsInfo &Info = getAnalysis<GISelKnownBitsInfoAnalysis>().get(MF);
/// Add to observer if the Info is caching.
/// WrapperObserver.addObserver(Info);

/// Eventually add other features such as caching/ser/deserializing
/// to MIR etc. Those implementations can derive from GISelKnownBits
/// and override computeKnownBitsImpl.
class GISelKnownBitsAnalysis : public MachineFunctionPass { … };
} // namespace llvm

#endif // LLVM_CODEGEN_GLOBALISEL_GISELKNOWNBITS_H