llvm/llvm/lib/Transforms/Utils/RelLookupTableConverter.cpp

//===- RelLookupTableConverterPass - Rel Table Conv -----------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// This file implements relative lookup table converter that converts
// lookup tables to relative lookup tables to make them PIC-friendly.
//
//===----------------------------------------------------------------------===//

#include "llvm/Transforms/Utils/RelLookupTableConverter.h"
#include "llvm/Analysis/ConstantFolding.h"
#include "llvm/Analysis/TargetTransformInfo.h"
#include "llvm/IR/BasicBlock.h"
#include "llvm/IR/IRBuilder.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/Module.h"

usingnamespacellvm;

static bool shouldConvertToRelLookupTable(Module &M, GlobalVariable &GV) { … }

static GlobalVariable *createRelLookupTable(Function &Func,
                                            GlobalVariable &LookupTable) { … }

static void convertToRelLookupTable(GlobalVariable &LookupTable) { … }

// Convert lookup tables to relative lookup tables in the module.
static bool convertToRelativeLookupTables(
    Module &M, function_ref<TargetTransformInfo &(Function &)> GetTTI) { … }

PreservedAnalyses RelLookupTableConverterPass::run(Module &M,
                                                   ModuleAnalysisManager &AM) { … }