llvm/bolt/lib/Passes/FrameOptimizer.cpp

//===- bolt/Passes/FrameOptimizer.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 the FrameOptimizerPass class.
//
//===----------------------------------------------------------------------===//

#include "bolt/Passes/FrameOptimizer.h"
#include "bolt/Core/BinaryFunctionCallGraph.h"
#include "bolt/Core/ParallelUtilities.h"
#include "bolt/Passes/DataflowInfoManager.h"
#include "bolt/Passes/ShrinkWrapping.h"
#include "bolt/Passes/StackAvailableExpressions.h"
#include "bolt/Passes/StackReachingUses.h"
#include "bolt/Utils/CommandLineOpts.h"
#include "llvm/Support/Timer.h"
#include <deque>

#define DEBUG_TYPE …

usingnamespacellvm;

namespace opts {
extern cl::opt<unsigned> Verbosity;
extern cl::opt<bool> TimeOpts;
extern cl::OptionCategory BoltOptCategory;

usingnamespacebolt;

cl::opt<FrameOptimizationType>
FrameOptimization("frame-opt",
  cl::init(FOP_NONE),
  cl::desc("optimize stack frame accesses"),
  cl::values(
    clEnumValN(FOP_NONE, "none", "do not perform frame optimization"),
    clEnumValN(FOP_HOT, "hot", "perform FOP on hot functions"),
    clEnumValN(FOP_ALL, "all", "perform FOP on all functions")),
  cl::ZeroOrMore,
  cl::cat(BoltOptCategory));

cl::opt<bool> RemoveStores(
    "frame-opt-rm-stores", cl::init(FOP_NONE),
    cl::desc("apply additional analysis to remove stores (experimental)"),
    cl::cat(BoltOptCategory));

} // namespace opts

namespace llvm {
namespace bolt {

void FrameOptimizerPass::removeUnnecessaryLoads(const RegAnalysis &RA,
                                                const FrameAnalysis &FA,
                                                BinaryFunction &BF) { … }

void FrameOptimizerPass::removeUnusedStores(const FrameAnalysis &FA,
                                            BinaryFunction &BF) { … }

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

Error FrameOptimizerPass::performShrinkWrapping(const RegAnalysis &RA,
                                                const FrameAnalysis &FA,
                                                BinaryContext &BC) { … }

} // namespace bolt
} // namespace llvm