1 //===- lib/MC/MCObjectWriter.cpp - MCObjectWriter implementation ----------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "llvm/MC/MCAssembler.h"
11 #include "llvm/MC/MCExpr.h"
12 #include "llvm/MC/MCObjectWriter.h"
13 #include "llvm/MC/MCSymbol.h"
17 MCObjectWriter::~MCObjectWriter() {
21 MCObjectWriter::IsSymbolRefDifferenceFullyResolved(const MCAssembler &Asm,
22 const MCSymbolRefExpr *A,
23 const MCSymbolRefExpr *B,
25 // Modified symbol references cannot be resolved.
26 if (A->getKind() != MCSymbolRefExpr::VK_None ||
27 B->getKind() != MCSymbolRefExpr::VK_None)
30 const MCSymbol &SA = A->getSymbol();
31 const MCSymbol &SB = B->getSymbol();
32 if (SA.AliasedSymbol().isUndefined() || SB.AliasedSymbol().isUndefined())
35 const MCSymbolData &DataA = Asm.getSymbolData(SA);
36 const MCSymbolData &DataB = Asm.getSymbolData(SB);
37 if(!DataA.getFragment() || !DataB.getFragment())
40 return IsSymbolRefDifferenceFullyResolvedImpl(Asm, DataA,
47 MCObjectWriter::IsSymbolRefDifferenceFullyResolvedImpl(const MCAssembler &Asm,
48 const MCSymbolData &DataA,
52 const MCSection &SecA = DataA.getSymbol().AliasedSymbol().getSection();
53 const MCSection &SecB = FB.getParent()->getSection();
54 // On ELF and COFF A - B is absolute if A and B are in the same section.
55 return &SecA == &SecB;