TargetELFWriterInfo.cpp

//===-- lib/Target/TargetELFWriterInfo.cpp - ELF Writer Info --0-*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements the TargetELFWriterInfo class.
//
//===----------------------------------------------------------------------===//

#include "llvm/Function.h"
#include "llvm/Target/TargetELFWriterInfo.h"
#include "llvm/Target/TargetData.h"
#include "llvm/Target/TargetMachine.h"
using namespace llvm;

TargetELFWriterInfo::TargetELFWriterInfo(TargetMachine &tm) : TM(tm) {
  is64Bit = TM.getTargetData()->getPointerSizeInBits() == 64;
  isLittleEndian = TM.getTargetData()->isLittleEndian();
}

TargetELFWriterInfo::~TargetELFWriterInfo() {}

/// getFunctionAlignment - Returns the alignment for function 'F', targets
/// with different alignment constraints should overload this method
unsigned TargetELFWriterInfo::getFunctionAlignment(const Function *F) const {
  const TargetData *TD = TM.getTargetData();
  unsigned FnAlign = F->getAlignment();
  unsigned TDAlign = TD->getPointerABIAlignment();
  unsigned Align = std::max(FnAlign, TDAlign);
  assert(!(Align & (Align-1)) && "Alignment is not a power of two!");
  return Align;
}