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Remove unnecessary uses of AliasedSymbol.

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As pr19627 points out, every use of AliasedSymbol is likely a bug.

The main use was to avoid the oddity of a variable showing up as undefined. That
was fixed in r233995, which made these calls nops.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@234169 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola 2015-04-06 16:10:05 +00:00
parent 1f1fecb823
commit e17e7a2400
3 changed files with 7 additions and 8 deletions
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7
lib/MC/MCAssembler.cpp
View File

@ -497,8 +497,7 @@ bool MCAssembler::evaluateFixup(const MCAsmLayout &Layout,
} else {
const MCSymbolRefExpr *A = Target.getSymA();
const MCSymbol &SA = A->getSymbol();
if (A->getKind() != MCSymbolRefExpr::VK_None ||
SA.AliasedSymbol().isUndefined()) {
if (A->getKind() != MCSymbolRefExpr::VK_None || SA.isUndefined()) {
IsResolved = false;
} else {
const MCSymbolData &DataA = getSymbolData(SA);
@ -513,12 +512,12 @@ bool MCAssembler::evaluateFixup(const MCAsmLayout &Layout,
Value = Target.getConstant();
if (const MCSymbolRefExpr *A = Target.getSymA()) {
const MCSymbol &Sym = A->getSymbol().AliasedSymbol();
const MCSymbol &Sym = A->getSymbol();
if (Sym.isDefined())
Value += Layout.getSymbolOffset(&getSymbolData(Sym));
}
if (const MCSymbolRefExpr *B = Target.getSymB()) {
const MCSymbol &Sym = B->getSymbol().AliasedSymbol();
const MCSymbol &Sym = B->getSymbol();
if (Sym.isDefined())
Value -= Layout.getSymbolOffset(&getSymbolData(Sym));
}

4
lib/MC/MCObjectWriter.cpp
View File

@ -27,7 +27,7 @@ bool MCObjectWriter::IsSymbolRefDifferenceFullyResolved(
const MCSymbol &SA = A->getSymbol();
const MCSymbol &SB = B->getSymbol();
if (SA.AliasedSymbol().isUndefined() || SB.AliasedSymbol().isUndefined())
if (SA.isUndefined() || SB.isUndefined())
return false;
const MCSymbolData &DataA = Asm.getSymbolData(SA);
@ -43,7 +43,7 @@ bool MCObjectWriter::IsSymbolRefDifferenceFullyResolvedImpl(
const MCAssembler &Asm, const MCSymbolData &DataA,
const MCSymbolData *DataB, const MCFragment &FB, bool InSet,
bool IsPCRel) const {
const MCSection &SecA = DataA.getSymbol().AliasedSymbol().getSection();
const MCSection &SecA = DataA.getSymbol().getSection();
const MCSection &SecB = FB.getParent()->getSection();
// On ELF and COFF A - B is absolute if A and B are in the same section.
return &SecA == &SecB;

4
lib/Target/ARM/MCTargetDesc/ARMAsmBackend.cpp
View File

@ -589,7 +589,7 @@ void ARMAsmBackend::processFixupValue(const MCAssembler &Asm,
(unsigned)Fixup.getKind() != ARM::fixup_t2_adr_pcrel_12 &&
(unsigned)Fixup.getKind() != ARM::fixup_arm_thumb_cp) {
if (A) {
const MCSymbol &Sym = A->getSymbol().AliasedSymbol();
const MCSymbol &Sym = A->getSymbol();
if (Asm.isThumbFunc(&Sym))
Value |= 1;
}
@ -598,7 +598,7 @@ void ARMAsmBackend::processFixupValue(const MCAssembler &Asm,
// the basic blocks of the same function. Thus, we would like to resolve
// the offset when the destination has the same MCFragment.
if (A && (unsigned)Fixup.getKind() == ARM::fixup_arm_thumb_bl) {
const MCSymbol &Sym = A->getSymbol().AliasedSymbol();
const MCSymbol &Sym = A->getSymbol();
const MCSymbolData &SymData = Asm.getSymbolData(Sym);
IsResolved = (SymData.getFragment() == DF);
}