llvm/bolt/include/bolt/Passes/ShrinkWrapping.h

//===- bolt/Passes/ShrinkWrapping.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
//
//===----------------------------------------------------------------------===//

#ifndef BOLT_PASSES_SHRINKWRAPPING_H
#define BOLT_PASSES_SHRINKWRAPPING_H

#include "bolt/Passes/FrameAnalysis.h"
#include "llvm/MC/MCRegisterInfo.h"
#include <atomic>

namespace llvm {
namespace bolt {
class DataflowInfoManager;

/// Encapsulates logic required to analyze a binary function and detect which
/// registers are being saved as callee-saved, where are these saves and where
/// are the points where their original value are being restored.
class CalleeSavedAnalysis { … };

/// Identifies in a given binary function all stack regions being used and allow
/// us to edit the layout, removing or inserting new regions. When the layout is
/// modified, all affected stack-accessing instructions are updated.
class StackLayoutModifier { … };

/// Implements a pass to optimize callee-saved register spills. These spills
/// typically happen at function prologue/epilogue. When these are hot basic
/// blocks, this pass will try to move these spills to cold blocks whenever
/// possible.
class ShrinkWrapping { … };

} // end namespace bolt
} // end namespace llvm

#endif