aboutsummaryrefslogtreecommitdiffstats
path: root/contrib/libs/llvm14/lib/MC/MCObjectWriter.cpp
blob: a058bbe0ba0b8b475446d783a8a46997be8c61ec (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
//===- lib/MC/MCObjectWriter.cpp - MCObjectWriter implementation ----------===//
//
// 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 "llvm/MC/MCObjectWriter.h"
#include "llvm/MC/MCAssembler.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCFragment.h"
#include "llvm/MC/MCSymbol.h"

using namespace llvm;

MCObjectWriter::~MCObjectWriter() = default;

bool MCObjectWriter::isSymbolRefDifferenceFullyResolved(
    const MCAssembler &Asm, const MCSymbolRefExpr *A, const MCSymbolRefExpr *B,
    bool InSet) const {
  // Modified symbol references cannot be resolved.
  if (A->getKind() != MCSymbolRefExpr::VK_None ||
      B->getKind() != MCSymbolRefExpr::VK_None)
    return false;

  const MCSymbol &SA = A->getSymbol();
  const MCSymbol &SB = B->getSymbol();
  if (SA.isUndefined() || SB.isUndefined())
    return false;

  if (!SA.getFragment() || !SB.getFragment())
    return false;

  return isSymbolRefDifferenceFullyResolvedImpl(Asm, SA, SB, InSet);
}

bool MCObjectWriter::isSymbolRefDifferenceFullyResolvedImpl(
    const MCAssembler &Asm, const MCSymbol &A, const MCSymbol &B,
    bool InSet) const {
  return isSymbolRefDifferenceFullyResolvedImpl(Asm, A, *B.getFragment(), InSet,
                                                false);
}

bool MCObjectWriter::isSymbolRefDifferenceFullyResolvedImpl(
    const MCAssembler &Asm, const MCSymbol &SymA, const MCFragment &FB,
    bool InSet, bool IsPCRel) const {
  const MCSection &SecA = SymA.getSection();
  const MCSection &SecB = *FB.getParent();
  // On ELF and COFF  A - B is absolute if A and B are in the same section.
  return &SecA == &SecB;
}