1//===- AlignFragment.cpp --------------------------------------------------===//
2//
3//                     The MCLinker Project
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9#include <mcld/Fragment/AlignFragment.h>
10
11#include <llvm/Support/MathExtras.h>
12#include <mcld/LD/SectionData.h>
13
14using namespace mcld;
15
16//===----------------------------------------------------------------------===//
17// AlignFragment
18//===----------------------------------------------------------------------===//
19AlignFragment::AlignFragment(unsigned int pAlignment,
20                             int64_t pValue,
21                             unsigned int pValueSize,
22                             unsigned int pMaxBytesToEmit,
23                             SectionData *pSD)
24  : Fragment(Fragment::Alignment, pSD), m_Alignment(pAlignment),
25    m_Value(pValue), m_ValueSize(pValueSize), m_MaxBytesToEmit(pMaxBytesToEmit),
26    m_bEmitNops(false) {
27}
28
29size_t AlignFragment::size() const
30{
31  assert(hasOffset() && "AlignFragment::size() should not be called before layout.");
32  uint64_t size = llvm::OffsetToAlignment(getOffset(), m_Alignment);
33  if (size > m_MaxBytesToEmit)
34    return 0;
35
36  return size;
37}
38
39