llvm/bolt/lib/Passes/JTFootprintReduction.cpp

//===- bolt/Passes/JTFootprintReduction.cpp -------------------------------===//
//
// 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 JTFootprintReduction class.
//
//===----------------------------------------------------------------------===//

#include "bolt/Passes/JTFootprintReduction.h"
#include "bolt/Core/BinaryFunctionCallGraph.h"
#include "bolt/Passes/DataflowInfoManager.h"
#include "llvm/Support/CommandLine.h"

#define DEBUG_TYPE …

usingnamespacellvm;
usingnamespacebolt;

namespace opts {

extern cl::OptionCategory BoltOptCategory;

extern cl::opt<unsigned> Verbosity;

extern cl::opt<JumpTableSupportLevel> JumpTables;

static cl::opt<bool> JTFootprintOnlyPIC(
    "jt-footprint-optimize-for-icache",
    cl::desc("with jt-footprint-reduction, only process PIC jumptables and turn"
             " off other transformations that increase code size"),
    cl::init(false), cl::ZeroOrMore, cl::cat(BoltOptCategory));

} // namespace opts

namespace llvm {
namespace bolt {

void JTFootprintReduction::checkOpportunities(BinaryFunction &Function,
                                              DataflowInfoManager &Info) { … }

bool JTFootprintReduction::tryOptimizeNonPIC(
    BinaryContext &BC, BinaryBasicBlock &BB, BinaryBasicBlock::iterator Inst,
    uint64_t JTAddr, JumpTable *JumpTable, DataflowInfoManager &Info) { … }

bool JTFootprintReduction::tryOptimizePIC(BinaryContext &BC,
                                          BinaryBasicBlock &BB,
                                          BinaryBasicBlock::iterator Inst,
                                          uint64_t JTAddr, JumpTable *JumpTable,
                                          DataflowInfoManager &Info) { … }

void JTFootprintReduction::optimizeFunction(BinaryFunction &Function,
                                            DataflowInfoManager &Info) { … }

Error JTFootprintReduction::runOnFunctions(BinaryContext &BC) { … }

} // namespace bolt
} // namespace llvm