else
OS << Sym;
- if (SRE.getKind() != MCSymbolRefExpr::VK_None) {
- if (SRE.getMCAsmInfo().useParensForSymbolVariant())
- OS << '(' << MCSymbolRefExpr::getVariantKindName(SRE.getKind()) << ')';
- else
- OS << '@' << MCSymbolRefExpr::getVariantKindName(SRE.getKind());
- }
+ if (SRE.getKind() != MCSymbolRefExpr::VK_None)
+ SRE.printVariantKind(OS);
return;
}
/* *** */
+MCSymbolRefExpr::MCSymbolRefExpr(const MCSymbol *Symbol, VariantKind Kind,
+ const MCAsmInfo *MAI)
+ : MCExpr(MCExpr::SymbolRef), Kind(Kind),
+ UseParensForSymbolVariant(MAI->useParensForSymbolVariant()),
+ HasSubsectionsViaSymbols(MAI->hasSubsectionsViaSymbols()),
+ Symbol(Symbol) {
+ assert(Symbol);
+}
+
const MCSymbolRefExpr *MCSymbolRefExpr::Create(const MCSymbol *Sym,
VariantKind Kind,
MCContext &Ctx) {
case VK_GOTPAGE: return "GOTPAGE";
case VK_GOTPAGEOFF: return "GOTPAGEOFF";
case VK_SECREL: return "SECREL32";
+ case VK_SIZE: return "SIZE";
case VK_WEAKREF: return "WEAKREF";
case VK_ARM_NONE: return "none";
case VK_ARM_TARGET1: return "target1";
case VK_ARM_TARGET2: return "target2";
case VK_ARM_PREL31: return "prel31";
+ case VK_ARM_SBREL: return "sbrel";
case VK_ARM_TLSLDO: return "tlsldo";
case VK_ARM_TLSCALL: return "tlscall";
case VK_ARM_TLSDESC: return "tlsdesc";
case VK_PPC_GOT_TLSLD_HI: return "got@tlsld@h";
case VK_PPC_GOT_TLSLD_HA: return "got@tlsld@ha";
case VK_PPC_TLSLD: return "tlsld";
+ case VK_PPC_LOCAL: return "local";
case VK_Mips_GPREL: return "GPREL";
case VK_Mips_GOT_CALL: return "GOT_CALL";
case VK_Mips_GOT16: return "GOT16";
case VK_Mips_CALL_LO16: return "CALL_LO16";
case VK_Mips_PCREL_HI16: return "PCREL_HI16";
case VK_Mips_PCREL_LO16: return "PCREL_LO16";
- case VK_COFF_IMGREL32: return "IMGREL32";
+ case VK_COFF_IMGREL32: return "IMGREL";
}
llvm_unreachable("Invalid variant kind");
}
MCSymbolRefExpr::VariantKind
MCSymbolRefExpr::getVariantKindForName(StringRef Name) {
- return StringSwitch<VariantKind>(Name)
- .Case("GOT", VK_GOT)
+ return StringSwitch<VariantKind>(Name.lower())
.Case("got", VK_GOT)
- .Case("GOTOFF", VK_GOTOFF)
.Case("gotoff", VK_GOTOFF)
- .Case("GOTPCREL", VK_GOTPCREL)
.Case("gotpcrel", VK_GOTPCREL)
- .Case("GOT_PREL", VK_GOTPCREL)
.Case("got_prel", VK_GOTPCREL)
- .Case("GOTTPOFF", VK_GOTTPOFF)
.Case("gottpoff", VK_GOTTPOFF)
- .Case("INDNTPOFF", VK_INDNTPOFF)
.Case("indntpoff", VK_INDNTPOFF)
- .Case("NTPOFF", VK_NTPOFF)
.Case("ntpoff", VK_NTPOFF)
- .Case("GOTNTPOFF", VK_GOTNTPOFF)
.Case("gotntpoff", VK_GOTNTPOFF)
- .Case("PLT", VK_PLT)
.Case("plt", VK_PLT)
- .Case("TLSGD", VK_TLSGD)
.Case("tlsgd", VK_TLSGD)
- .Case("TLSLD", VK_TLSLD)
.Case("tlsld", VK_TLSLD)
- .Case("TLSLDM", VK_TLSLDM)
.Case("tlsldm", VK_TLSLDM)
- .Case("TPOFF", VK_TPOFF)
.Case("tpoff", VK_TPOFF)
- .Case("DTPOFF", VK_DTPOFF)
.Case("dtpoff", VK_DTPOFF)
- .Case("TLVP", VK_TLVP)
.Case("tlvp", VK_TLVP)
- .Case("TLVPPAGE", VK_TLVPPAGE)
.Case("tlvppage", VK_TLVPPAGE)
- .Case("TLVPPAGEOFF", VK_TLVPPAGEOFF)
.Case("tlvppageoff", VK_TLVPPAGEOFF)
- .Case("PAGE", VK_PAGE)
.Case("page", VK_PAGE)
- .Case("PAGEOFF", VK_PAGEOFF)
.Case("pageoff", VK_PAGEOFF)
- .Case("GOTPAGE", VK_GOTPAGE)
.Case("gotpage", VK_GOTPAGE)
- .Case("GOTPAGEOFF", VK_GOTPAGEOFF)
.Case("gotpageoff", VK_GOTPAGEOFF)
- .Case("IMGREL", VK_COFF_IMGREL32)
.Case("imgrel", VK_COFF_IMGREL32)
- .Case("SECREL32", VK_SECREL)
.Case("secrel32", VK_SECREL)
- .Case("L", VK_PPC_LO)
+ .Case("size", VK_SIZE)
.Case("l", VK_PPC_LO)
- .Case("H", VK_PPC_HI)
.Case("h", VK_PPC_HI)
- .Case("HA", VK_PPC_HA)
.Case("ha", VK_PPC_HA)
- .Case("HIGHER", VK_PPC_HIGHER)
.Case("higher", VK_PPC_HIGHER)
- .Case("HIGHERA", VK_PPC_HIGHERA)
.Case("highera", VK_PPC_HIGHERA)
- .Case("HIGHEST", VK_PPC_HIGHEST)
.Case("highest", VK_PPC_HIGHEST)
- .Case("HIGHESTA", VK_PPC_HIGHESTA)
.Case("highesta", VK_PPC_HIGHESTA)
- .Case("GOT@L", VK_PPC_GOT_LO)
.Case("got@l", VK_PPC_GOT_LO)
- .Case("GOT@H", VK_PPC_GOT_HI)
.Case("got@h", VK_PPC_GOT_HI)
- .Case("GOT@HA", VK_PPC_GOT_HA)
.Case("got@ha", VK_PPC_GOT_HA)
- .Case("TOCBASE", VK_PPC_TOCBASE)
+ .Case("local", VK_PPC_LOCAL)
.Case("tocbase", VK_PPC_TOCBASE)
- .Case("TOC", VK_PPC_TOC)
.Case("toc", VK_PPC_TOC)
- .Case("TOC@L", VK_PPC_TOC_LO)
.Case("toc@l", VK_PPC_TOC_LO)
- .Case("TOC@H", VK_PPC_TOC_HI)
.Case("toc@h", VK_PPC_TOC_HI)
- .Case("TOC@HA", VK_PPC_TOC_HA)
.Case("toc@ha", VK_PPC_TOC_HA)
- .Case("TLS", VK_PPC_TLS)
.Case("tls", VK_PPC_TLS)
- .Case("DTPMOD", VK_PPC_DTPMOD)
.Case("dtpmod", VK_PPC_DTPMOD)
- .Case("TPREL", VK_PPC_TPREL)
.Case("tprel", VK_PPC_TPREL)
- .Case("TPREL@L", VK_PPC_TPREL_LO)
.Case("tprel@l", VK_PPC_TPREL_LO)
- .Case("TPREL@H", VK_PPC_TPREL_HI)
.Case("tprel@h", VK_PPC_TPREL_HI)
- .Case("TPREL@HA", VK_PPC_TPREL_HA)
.Case("tprel@ha", VK_PPC_TPREL_HA)
- .Case("TPREL@HIGHER", VK_PPC_TPREL_HIGHER)
.Case("tprel@higher", VK_PPC_TPREL_HIGHER)
- .Case("TPREL@HIGHERA", VK_PPC_TPREL_HIGHERA)
.Case("tprel@highera", VK_PPC_TPREL_HIGHERA)
- .Case("TPREL@HIGHEST", VK_PPC_TPREL_HIGHEST)
.Case("tprel@highest", VK_PPC_TPREL_HIGHEST)
- .Case("TPREL@HIGHESTA", VK_PPC_TPREL_HIGHESTA)
.Case("tprel@highesta", VK_PPC_TPREL_HIGHESTA)
- .Case("DTPREL", VK_PPC_DTPREL)
.Case("dtprel", VK_PPC_DTPREL)
- .Case("DTPREL@L", VK_PPC_DTPREL_LO)
.Case("dtprel@l", VK_PPC_DTPREL_LO)
- .Case("DTPREL@H", VK_PPC_DTPREL_HI)
.Case("dtprel@h", VK_PPC_DTPREL_HI)
- .Case("DTPREL@HA", VK_PPC_DTPREL_HA)
.Case("dtprel@ha", VK_PPC_DTPREL_HA)
- .Case("DTPREL@HIGHER", VK_PPC_DTPREL_HIGHER)
.Case("dtprel@higher", VK_PPC_DTPREL_HIGHER)
- .Case("DTPREL@HIGHERA", VK_PPC_DTPREL_HIGHERA)
.Case("dtprel@highera", VK_PPC_DTPREL_HIGHERA)
- .Case("DTPREL@HIGHEST", VK_PPC_DTPREL_HIGHEST)
.Case("dtprel@highest", VK_PPC_DTPREL_HIGHEST)
- .Case("DTPREL@HIGHESTA", VK_PPC_DTPREL_HIGHESTA)
.Case("dtprel@highesta", VK_PPC_DTPREL_HIGHESTA)
- .Case("GOT@TPREL", VK_PPC_GOT_TPREL)
.Case("got@tprel", VK_PPC_GOT_TPREL)
- .Case("GOT@TPREL@L", VK_PPC_GOT_TPREL_LO)
.Case("got@tprel@l", VK_PPC_GOT_TPREL_LO)
- .Case("GOT@TPREL@H", VK_PPC_GOT_TPREL_HI)
.Case("got@tprel@h", VK_PPC_GOT_TPREL_HI)
- .Case("GOT@TPREL@HA", VK_PPC_GOT_TPREL_HA)
.Case("got@tprel@ha", VK_PPC_GOT_TPREL_HA)
- .Case("GOT@DTPREL", VK_PPC_GOT_DTPREL)
.Case("got@dtprel", VK_PPC_GOT_DTPREL)
- .Case("GOT@DTPREL@L", VK_PPC_GOT_DTPREL_LO)
.Case("got@dtprel@l", VK_PPC_GOT_DTPREL_LO)
- .Case("GOT@DTPREL@H", VK_PPC_GOT_DTPREL_HI)
.Case("got@dtprel@h", VK_PPC_GOT_DTPREL_HI)
- .Case("GOT@DTPREL@HA", VK_PPC_GOT_DTPREL_HA)
.Case("got@dtprel@ha", VK_PPC_GOT_DTPREL_HA)
- .Case("GOT@TLSGD", VK_PPC_GOT_TLSGD)
.Case("got@tlsgd", VK_PPC_GOT_TLSGD)
- .Case("GOT@TLSGD@L", VK_PPC_GOT_TLSGD_LO)
.Case("got@tlsgd@l", VK_PPC_GOT_TLSGD_LO)
- .Case("GOT@TLSGD@H", VK_PPC_GOT_TLSGD_HI)
.Case("got@tlsgd@h", VK_PPC_GOT_TLSGD_HI)
- .Case("GOT@TLSGD@HA", VK_PPC_GOT_TLSGD_HA)
.Case("got@tlsgd@ha", VK_PPC_GOT_TLSGD_HA)
- .Case("GOT@TLSLD", VK_PPC_GOT_TLSLD)
.Case("got@tlsld", VK_PPC_GOT_TLSLD)
- .Case("GOT@TLSLD@L", VK_PPC_GOT_TLSLD_LO)
.Case("got@tlsld@l", VK_PPC_GOT_TLSLD_LO)
- .Case("GOT@TLSLD@H", VK_PPC_GOT_TLSLD_HI)
.Case("got@tlsld@h", VK_PPC_GOT_TLSLD_HI)
- .Case("GOT@TLSLD@HA", VK_PPC_GOT_TLSLD_HA)
.Case("got@tlsld@ha", VK_PPC_GOT_TLSLD_HA)
- .Case("NONE", VK_ARM_NONE)
.Case("none", VK_ARM_NONE)
- .Case("TARGET1", VK_ARM_TARGET1)
.Case("target1", VK_ARM_TARGET1)
- .Case("TARGET2", VK_ARM_TARGET2)
.Case("target2", VK_ARM_TARGET2)
- .Case("PREL31", VK_ARM_PREL31)
.Case("prel31", VK_ARM_PREL31)
- .Case("TLSLDO", VK_ARM_TLSLDO)
+ .Case("sbrel", VK_ARM_SBREL)
.Case("tlsldo", VK_ARM_TLSLDO)
- .Case("TLSCALL", VK_ARM_TLSCALL)
.Case("tlscall", VK_ARM_TLSCALL)
- .Case("TLSDESC", VK_ARM_TLSDESC)
.Case("tlsdesc", VK_ARM_TLSDESC)
.Default(VK_Invalid);
}
+void MCSymbolRefExpr::printVariantKind(raw_ostream &OS) const {
+ if (UseParensForSymbolVariant)
+ OS << '(' << MCSymbolRefExpr::getVariantKindName(getKind()) << ')';
+ else
+ OS << '@' << MCSymbolRefExpr::getVariantKindName(getKind());
+}
+
/* *** */
void MCTargetExpr::anchor() {}
return EvaluateAsAbsolute(Res, &Asm, nullptr, nullptr);
}
+bool MCExpr::evaluateKnownAbsolute(int64_t &Res,
+ const MCAsmLayout &Layout) const {
+ return evaluateAsAbsolute(Res, &Layout.getAssembler(), &Layout, nullptr,
+ true);
+}
+
bool MCExpr::EvaluateAsAbsolute(int64_t &Res, const MCAssembler *Asm,
const MCAsmLayout *Layout,
const SectionAddrMap *Addrs) const {
+ // FIXME: The use if InSet = Addrs is a hack. Setting InSet causes us
+ // absolutize differences across sections and that is what the MachO writer
+ // uses Addrs for.
+ return evaluateAsAbsolute(Res, Asm, Layout, Addrs, Addrs);
+}
+
+bool MCExpr::evaluateAsAbsolute(int64_t &Res, const MCAssembler *Asm,
+ const MCAsmLayout *Layout,
+ const SectionAddrMap *Addrs, bool InSet) const {
MCValue Value;
// Fast path constants.
return true;
}
- // FIXME: The use if InSet = Addrs is a hack. Setting InSet causes us
- // absolutize differences across sections and that is what the MachO writer
- // uses Addrs for.
bool IsRelocatable =
- EvaluateAsRelocatableImpl(Value, Asm, Layout, Addrs, /*InSet*/ Addrs,
- /*ForceVarExpansion*/ false);
+ EvaluateAsRelocatableImpl(Value, Asm, Layout, nullptr, Addrs, InSet);
// Record the current value.
Res = Value.getConstant();
}
/// \brief Helper method for \see EvaluateSymbolAdd().
-static void AttemptToFoldSymbolOffsetDifference(const MCAssembler *Asm,
- const MCAsmLayout *Layout,
- const SectionAddrMap *Addrs,
- bool InSet,
- const MCSymbolRefExpr *&A,
- const MCSymbolRefExpr *&B,
- int64_t &Addend) {
+static void AttemptToFoldSymbolOffsetDifference(
+ const MCAssembler *Asm, const MCAsmLayout *Layout,
+ const SectionAddrMap *Addrs, bool InSet, const MCSymbolRefExpr *&A,
+ const MCSymbolRefExpr *&B, int64_t &Addend) {
if (!A || !B)
return;
/// They might look redundant, but this function can be used before layout
/// is done (see the object streamer for example) and having the Asm argument
/// lets us avoid relaxations early.
-static bool EvaluateSymbolicAdd(const MCAssembler *Asm,
- const MCAsmLayout *Layout,
- const SectionAddrMap *Addrs,
- bool InSet,
- const MCValue &LHS,const MCSymbolRefExpr *RHS_A,
- const MCSymbolRefExpr *RHS_B, int64_t RHS_Cst,
- MCValue &Res) {
+static bool
+EvaluateSymbolicAdd(const MCAssembler *Asm, const MCAsmLayout *Layout,
+ const SectionAddrMap *Addrs, bool InSet, const MCValue &LHS,
+ const MCSymbolRefExpr *RHS_A, const MCSymbolRefExpr *RHS_B,
+ int64_t RHS_Cst, MCValue &Res) {
// FIXME: This routine (and other evaluation parts) are *incredibly* sloppy
// about dealing with modifiers. This will ultimately bite us, one day.
const MCSymbolRefExpr *LHS_A = LHS.getSymA();
}
bool MCExpr::EvaluateAsRelocatable(MCValue &Res,
- const MCAsmLayout *Layout) const {
+ const MCAsmLayout *Layout,
+ const MCFixup *Fixup) const {
MCAssembler *Assembler = Layout ? &Layout->getAssembler() : nullptr;
- return EvaluateAsRelocatableImpl(Res, Assembler, Layout, nullptr, false,
- /*ForceVarExpansion*/ false);
+ return EvaluateAsRelocatableImpl(Res, Assembler, Layout, Fixup, nullptr,
+ false);
}
-bool MCExpr::EvaluateAsValue(MCValue &Res, const MCAsmLayout *Layout) const {
- MCAssembler *Assembler = Layout ? &Layout->getAssembler() : nullptr;
- return EvaluateAsRelocatableImpl(Res, Assembler, Layout, nullptr, false,
- /*ForceVarExpansion*/ true);
+bool MCExpr::evaluateAsValue(MCValue &Res, const MCAsmLayout &Layout) const {
+ MCAssembler *Assembler = &Layout.getAssembler();
+ return EvaluateAsRelocatableImpl(Res, Assembler, &Layout, nullptr, nullptr,
+ true);
+}
+
+static bool canExpand(const MCSymbol &Sym, const MCAssembler *Asm, bool InSet) {
+ if (InSet)
+ return true;
+ if (!Asm)
+ return false;
+ const MCSymbolData &SD = Asm->getSymbolData(Sym);
+ return !Asm->getWriter().isWeak(SD);
}
bool MCExpr::EvaluateAsRelocatableImpl(MCValue &Res, const MCAssembler *Asm,
const MCAsmLayout *Layout,
- const SectionAddrMap *Addrs, bool InSet,
- bool ForceVarExpansion) const {
+ const MCFixup *Fixup,
+ const SectionAddrMap *Addrs,
+ bool InSet) const {
++stats::MCExprEvaluate;
switch (getKind()) {
case Target:
- return cast<MCTargetExpr>(this)->EvaluateAsRelocatableImpl(Res, Layout);
+ return cast<MCTargetExpr>(this)->EvaluateAsRelocatableImpl(Res, Layout,
+ Fixup);
case Constant:
Res = MCValue::get(cast<MCConstantExpr>(this)->getValue());
case SymbolRef: {
const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(this);
const MCSymbol &Sym = SRE->getSymbol();
- const MCAsmInfo &MCAsmInfo = SRE->getMCAsmInfo();
// Evaluate recursively if this is a variable.
- if (Sym.isVariable() && SRE->getKind() == MCSymbolRefExpr::VK_None) {
+ if (Sym.isVariable() && SRE->getKind() == MCSymbolRefExpr::VK_None &&
+ canExpand(Sym, Asm, InSet)) {
+ bool IsMachO = SRE->hasSubsectionsViaSymbols();
if (Sym.getVariableValue()->EvaluateAsRelocatableImpl(
- Res, Asm, Layout, Addrs, true, ForceVarExpansion)) {
+ Res, Asm, Layout, Fixup, Addrs, InSet || IsMachO)) {
+ if (!IsMachO)
+ return true;
+
const MCSymbolRefExpr *A = Res.getSymA();
const MCSymbolRefExpr *B = Res.getSymB();
-
- if (MCAsmInfo.hasSubsectionsViaSymbols()) {
- // FIXME: This is small hack. Given
- // a = b + 4
- // .long a
- // the OS X assembler will completely drop the 4. We should probably
- // include it in the relocation or produce an error if that is not
- // possible.
- if (!A && !B)
- return true;
- } else {
- if (ForceVarExpansion)
- return true;
- bool IsSymbol = A && A->getSymbol().isDefined();
- if (!IsSymbol)
- return true;
- }
+ // FIXME: This is small hack. Given
+ // a = b + 4
+ // .long a
+ // the OS X assembler will completely drop the 4. We should probably
+ // include it in the relocation or produce an error if that is not
+ // possible.
+ if (!A && !B)
+ return true;
}
}
const MCUnaryExpr *AUE = cast<MCUnaryExpr>(this);
MCValue Value;
- if (!AUE->getSubExpr()->EvaluateAsRelocatableImpl(Value, Asm, Layout, Addrs,
- InSet, ForceVarExpansion))
+ if (!AUE->getSubExpr()->EvaluateAsRelocatableImpl(Value, Asm, Layout, Fixup,
+ Addrs, InSet))
return false;
switch (AUE->getOpcode()) {
const MCBinaryExpr *ABE = cast<MCBinaryExpr>(this);
MCValue LHSValue, RHSValue;
- if (!ABE->getLHS()->EvaluateAsRelocatableImpl(LHSValue, Asm, Layout, Addrs,
- InSet, ForceVarExpansion) ||
- !ABE->getRHS()->EvaluateAsRelocatableImpl(RHSValue, Asm, Layout, Addrs,
- InSet, ForceVarExpansion))
+ if (!ABE->getLHS()->EvaluateAsRelocatableImpl(LHSValue, Asm, Layout, Fixup,
+ Addrs, InSet) ||
+ !ABE->getRHS()->EvaluateAsRelocatableImpl(RHSValue, Asm, Layout, Fixup,
+ Addrs, InSet))
return false;
// We only support a few operations on non-constant expressions, handle
// Negate RHS and add.
return EvaluateSymbolicAdd(Asm, Layout, Addrs, InSet, LHSValue,
RHSValue.getSymB(), RHSValue.getSymA(),
- -RHSValue.getConstant(),
- Res);
+ -RHSValue.getConstant(), Res);
case MCBinaryExpr::Add:
return EvaluateSymbolicAdd(Asm, Layout, Addrs, InSet, LHSValue,
RHSValue.getSymA(), RHSValue.getSymB(),
- RHSValue.getConstant(),
- Res);
+ RHSValue.getConstant(), Res);
}
}
if (RHS_S == MCSymbol::AbsolutePseudoSection)
return LHS_S;
+ // Not always correct, but probably the best we can do without more context.
+ if (BE->getOpcode() == MCBinaryExpr::Sub)
+ return MCSymbol::AbsolutePseudoSection;
+
// Otherwise, return the first non-null section.
return LHS_S ? LHS_S : RHS_S;
}
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