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to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
53 lines
1.8 KiB
C++
53 lines
1.8 KiB
C++
//===- lib/MC/MCObjectWriter.cpp - MCObjectWriter implementation ----------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/MC/MCObjectWriter.h"
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#include "llvm/MC/MCAssembler.h"
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#include "llvm/MC/MCExpr.h"
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#include "llvm/MC/MCFragment.h"
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#include "llvm/MC/MCSymbol.h"
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using namespace llvm;
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MCObjectWriter::~MCObjectWriter() = default;
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bool MCObjectWriter::isSymbolRefDifferenceFullyResolved(
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const MCAssembler &Asm, const MCSymbolRefExpr *A, const MCSymbolRefExpr *B,
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bool InSet) const {
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// Modified symbol references cannot be resolved.
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if (A->getKind() != MCSymbolRefExpr::VK_None ||
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B->getKind() != MCSymbolRefExpr::VK_None)
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return false;
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const MCSymbol &SA = A->getSymbol();
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const MCSymbol &SB = B->getSymbol();
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if (SA.isUndefined() || SB.isUndefined())
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return false;
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if (!SA.getFragment() || !SB.getFragment())
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return false;
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return isSymbolRefDifferenceFullyResolvedImpl(Asm, SA, SB, InSet);
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}
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bool MCObjectWriter::isSymbolRefDifferenceFullyResolvedImpl(
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const MCAssembler &Asm, const MCSymbol &A, const MCSymbol &B,
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bool InSet) const {
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return isSymbolRefDifferenceFullyResolvedImpl(Asm, A, *B.getFragment(), InSet,
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false);
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}
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bool MCObjectWriter::isSymbolRefDifferenceFullyResolvedImpl(
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const MCAssembler &Asm, const MCSymbol &SymA, const MCFragment &FB,
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bool InSet, bool IsPCRel) const {
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const MCSection &SecA = SymA.getSection();
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const MCSection &SecB = *FB.getParent();
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// On ELF and COFF A - B is absolute if A and B are in the same section.
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return &SecA == &SecB;
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}
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