llvm/llvm/lib/Target/Lanai/LanaiTargetObjectFile.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
//
//===----------------------------------------------------------------------===//

#include "LanaiTargetObjectFile.h"

#include "LanaiSubtarget.h"
#include "LanaiTargetMachine.h"
#include "llvm/BinaryFormat/ELF.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/DerivedTypes.h"
#include "llvm/IR/GlobalVariable.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCSectionELF.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Target/TargetMachine.h"

usingnamespacellvm;

static cl::opt<unsigned> SSThreshold(
    "lanai-ssection-threshold", cl::Hidden,
    cl::desc("Small data and bss section threshold size (default=0)"),
    cl::init(0));

void LanaiTargetObjectFile::Initialize(MCContext &Ctx,
                                       const TargetMachine &TM) { … }

// A address must be loaded from a small section if its size is less than the
// small section size threshold. Data in this section must be addressed using
// gp_rel operator.
static bool isInSmallSection(uint64_t Size) { … }

// Return true if this global address should be placed into small data/bss
// section.
bool LanaiTargetObjectFile::isGlobalInSmallSection(
    const GlobalObject *GO, const TargetMachine &TM) const { … }

// Return true if this global address should be placed into small data/bss
// section.
bool LanaiTargetObjectFile::isGlobalInSmallSection(const GlobalObject *GO,
                                                   const TargetMachine &TM,
                                                   SectionKind Kind) const { … }

// Return true if this global address should be placed into small data/bss
// section. This method does all the work, except for checking the section
// kind.
bool LanaiTargetObjectFile::isGlobalInSmallSectionImpl(
    const GlobalObject *GO, const TargetMachine &TM) const { … }

MCSection *LanaiTargetObjectFile::SelectSectionForGlobal(
    const GlobalObject *GO, SectionKind Kind, const TargetMachine &TM) const { … }

/// Return true if this constant should be placed into small data section.
bool LanaiTargetObjectFile::isConstantInSmallSection(const DataLayout &DL,
                                                     const Constant *CN) const { … }

MCSection *LanaiTargetObjectFile::getSectionForConstant(
    const DataLayout &DL, SectionKind Kind, const Constant *C,
    Align &Alignment) const { … }