//
//===----------------------------------------------------------------------===//
-#define DEBUG_TYPE "mcexpr"
#include "llvm/MC/MCExpr.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/ADT/StringSwitch.h"
+#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCAsmLayout.h"
#include "llvm/MC/MCAssembler.h"
#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCObjectWriter.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/MC/MCValue.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
+#define DEBUG_TYPE "mcexpr"
+
namespace {
namespace stats {
STATISTIC(MCExprEvaluate, "Number of MCExpr evaluations");
}
}
-void MCExpr::print(raw_ostream &OS) const {
+void MCExpr::print(raw_ostream &OS, const MCAsmInfo *MAI) const {
switch (getKind()) {
case MCExpr::Target:
- return cast<MCTargetExpr>(this)->PrintImpl(OS);
+ return cast<MCTargetExpr>(this)->printImpl(OS, MAI);
case MCExpr::Constant:
OS << cast<MCConstantExpr>(*this).getValue();
return;
// Parenthesize names that start with $ so that they don't look like
// absolute names.
bool UseParens = Sym.getName()[0] == '$';
+ if (UseParens) {
+ OS << '(';
+ Sym.print(OS, MAI);
+ OS << ')';
+ } else
+ Sym.print(OS, MAI);
- if (SRE.getKind() == MCSymbolRefExpr::VK_PPC_DARWIN_HA16 ||
- SRE.getKind() == MCSymbolRefExpr::VK_PPC_DARWIN_LO16) {
- OS << MCSymbolRefExpr::getVariantKindName(SRE.getKind());
- UseParens = true;
- }
-
- if (UseParens)
- OS << '(' << Sym << ')';
- else
- OS << Sym;
-
- if (SRE.getKind() == MCSymbolRefExpr::VK_ARM_PLT ||
- SRE.getKind() == MCSymbolRefExpr::VK_ARM_TLSGD ||
- SRE.getKind() == MCSymbolRefExpr::VK_ARM_GOT ||
- SRE.getKind() == MCSymbolRefExpr::VK_ARM_GOTOFF ||
- SRE.getKind() == MCSymbolRefExpr::VK_ARM_TPOFF ||
- SRE.getKind() == MCSymbolRefExpr::VK_ARM_GOTTPOFF ||
- SRE.getKind() == MCSymbolRefExpr::VK_ARM_TARGET1)
- OS << MCSymbolRefExpr::getVariantKindName(SRE.getKind());
- else if (SRE.getKind() != MCSymbolRefExpr::VK_None &&
- SRE.getKind() != MCSymbolRefExpr::VK_PPC_DARWIN_HA16 &&
- SRE.getKind() != MCSymbolRefExpr::VK_PPC_DARWIN_LO16)
- OS << '@' << MCSymbolRefExpr::getVariantKindName(SRE.getKind());
+ if (SRE.getKind() != MCSymbolRefExpr::VK_None)
+ SRE.printVariantKind(OS);
return;
}
case MCUnaryExpr::Not: OS << '~'; break;
case MCUnaryExpr::Plus: OS << '+'; break;
}
- OS << *UE.getSubExpr();
+ UE.getSubExpr()->print(OS, MAI);
return;
}
// Only print parens around the LHS if it is non-trivial.
if (isa<MCConstantExpr>(BE.getLHS()) || isa<MCSymbolRefExpr>(BE.getLHS())) {
- OS << *BE.getLHS();
+ BE.getLHS()->print(OS, MAI);
} else {
- OS << '(' << *BE.getLHS() << ')';
+ OS << '(';
+ BE.getLHS()->print(OS, MAI);
+ OS << ')';
}
switch (BE.getOpcode()) {
OS << '+';
break;
+ case MCBinaryExpr::AShr: OS << ">>"; break;
case MCBinaryExpr::And: OS << '&'; break;
case MCBinaryExpr::Div: OS << '/'; break;
case MCBinaryExpr::EQ: OS << "=="; break;
case MCBinaryExpr::GTE: OS << ">="; break;
case MCBinaryExpr::LAnd: OS << "&&"; break;
case MCBinaryExpr::LOr: OS << "||"; break;
+ case MCBinaryExpr::LShr: OS << ">>"; break;
case MCBinaryExpr::LT: OS << '<'; break;
case MCBinaryExpr::LTE: OS << "<="; break;
case MCBinaryExpr::Mod: OS << '%'; break;
case MCBinaryExpr::NE: OS << "!="; break;
case MCBinaryExpr::Or: OS << '|'; break;
case MCBinaryExpr::Shl: OS << "<<"; break;
- case MCBinaryExpr::Shr: OS << ">>"; break;
case MCBinaryExpr::Sub: OS << '-'; break;
case MCBinaryExpr::Xor: OS << '^'; break;
}
// Only print parens around the LHS if it is non-trivial.
if (isa<MCConstantExpr>(BE.getRHS()) || isa<MCSymbolRefExpr>(BE.getRHS())) {
- OS << *BE.getRHS();
+ BE.getRHS()->print(OS, MAI);
} else {
- OS << '(' << *BE.getRHS() << ')';
+ OS << '(';
+ BE.getRHS()->print(OS, MAI);
+ OS << ')';
}
return;
}
llvm_unreachable("Invalid expression kind!");
}
+#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
void MCExpr::dump() const {
- print(dbgs());
+ dbgs() << *this;
dbgs() << '\n';
}
+#endif
/* *** */
-const MCBinaryExpr *MCBinaryExpr::Create(Opcode Opc, const MCExpr *LHS,
+const MCBinaryExpr *MCBinaryExpr::create(Opcode Opc, const MCExpr *LHS,
const MCExpr *RHS, MCContext &Ctx) {
return new (Ctx) MCBinaryExpr(Opc, LHS, RHS);
}
-const MCUnaryExpr *MCUnaryExpr::Create(Opcode Opc, const MCExpr *Expr,
+const MCUnaryExpr *MCUnaryExpr::create(Opcode Opc, const MCExpr *Expr,
MCContext &Ctx) {
return new (Ctx) MCUnaryExpr(Opc, Expr);
}
-const MCConstantExpr *MCConstantExpr::Create(int64_t Value, MCContext &Ctx) {
+const MCConstantExpr *MCConstantExpr::create(int64_t Value, MCContext &Ctx) {
return new (Ctx) MCConstantExpr(Value);
}
/* *** */
-const MCSymbolRefExpr *MCSymbolRefExpr::Create(const MCSymbol *Sym,
+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) {
- return new (Ctx) MCSymbolRefExpr(Sym, Kind);
+ return new (Ctx) MCSymbolRefExpr(Sym, Kind, Ctx.getAsmInfo());
}
-const MCSymbolRefExpr *MCSymbolRefExpr::Create(StringRef Name, VariantKind Kind,
+const MCSymbolRefExpr *MCSymbolRefExpr::create(StringRef Name, VariantKind Kind,
MCContext &Ctx) {
- return Create(Ctx.GetOrCreateSymbol(Name), Kind, Ctx);
+ return create(Ctx.getOrCreateSymbol(Name), Kind, Ctx);
}
StringRef MCSymbolRefExpr::getVariantKindName(VariantKind Kind) {
case VK_TPOFF: return "TPOFF";
case VK_DTPOFF: return "DTPOFF";
case VK_TLVP: return "TLVP";
- case VK_ARM_PLT: return "(PLT)";
- case VK_ARM_GOT: return "(GOT)";
- case VK_ARM_GOTOFF: return "(GOTOFF)";
- case VK_ARM_TPOFF: return "(tpoff)";
- case VK_ARM_GOTTPOFF: return "(gottpoff)";
- case VK_ARM_TLSGD: return "(tlsgd)";
- case VK_ARM_TARGET1: return "(target1)";
+ case VK_TLVPPAGE: return "TLVPPAGE";
+ case VK_TLVPPAGEOFF: return "TLVPPAGEOFF";
+ case VK_PAGE: return "PAGE";
+ case VK_PAGEOFF: return "PAGEOFF";
+ 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_ARM_TLSDESCSEQ: return "tlsdescseq";
+ case VK_PPC_LO: return "l";
+ case VK_PPC_HI: return "h";
+ case VK_PPC_HA: return "ha";
+ case VK_PPC_HIGHER: return "higher";
+ case VK_PPC_HIGHERA: return "highera";
+ case VK_PPC_HIGHEST: return "highest";
+ case VK_PPC_HIGHESTA: return "highesta";
+ case VK_PPC_GOT_LO: return "got@l";
+ case VK_PPC_GOT_HI: return "got@h";
+ case VK_PPC_GOT_HA: return "got@ha";
+ case VK_PPC_TOCBASE: return "tocbase";
case VK_PPC_TOC: return "toc";
- case VK_PPC_DARWIN_HA16: return "ha16";
- case VK_PPC_DARWIN_LO16: return "lo16";
- case VK_PPC_GAS_HA16: return "ha";
- case VK_PPC_GAS_LO16: return "l";
+ case VK_PPC_TOC_LO: return "toc@l";
+ case VK_PPC_TOC_HI: return "toc@h";
+ case VK_PPC_TOC_HA: return "toc@ha";
+ case VK_PPC_DTPMOD: return "dtpmod";
+ case VK_PPC_TPREL: return "tprel";
+ case VK_PPC_TPREL_LO: return "tprel@l";
+ case VK_PPC_TPREL_HI: return "tprel@h";
+ case VK_PPC_TPREL_HA: return "tprel@ha";
+ case VK_PPC_TPREL_HIGHER: return "tprel@higher";
+ case VK_PPC_TPREL_HIGHERA: return "tprel@highera";
+ case VK_PPC_TPREL_HIGHEST: return "tprel@highest";
+ case VK_PPC_TPREL_HIGHESTA: return "tprel@highesta";
+ case VK_PPC_DTPREL: return "dtprel";
+ case VK_PPC_DTPREL_LO: return "dtprel@l";
+ case VK_PPC_DTPREL_HI: return "dtprel@h";
+ case VK_PPC_DTPREL_HA: return "dtprel@ha";
+ case VK_PPC_DTPREL_HIGHER: return "dtprel@higher";
+ case VK_PPC_DTPREL_HIGHERA: return "dtprel@highera";
+ case VK_PPC_DTPREL_HIGHEST: return "dtprel@highest";
+ case VK_PPC_DTPREL_HIGHESTA: return "dtprel@highesta";
+ case VK_PPC_GOT_TPREL: return "got@tprel";
+ case VK_PPC_GOT_TPREL_LO: return "got@tprel@l";
+ case VK_PPC_GOT_TPREL_HI: return "got@tprel@h";
+ case VK_PPC_GOT_TPREL_HA: return "got@tprel@ha";
+ case VK_PPC_GOT_DTPREL: return "got@dtprel";
+ case VK_PPC_GOT_DTPREL_LO: return "got@dtprel@l";
+ case VK_PPC_GOT_DTPREL_HI: return "got@dtprel@h";
+ case VK_PPC_GOT_DTPREL_HA: return "got@dtprel@ha";
+ case VK_PPC_TLS: return "tls";
+ case VK_PPC_GOT_TLSGD: return "got@tlsgd";
+ case VK_PPC_GOT_TLSGD_LO: return "got@tlsgd@l";
+ case VK_PPC_GOT_TLSGD_HI: return "got@tlsgd@h";
+ case VK_PPC_GOT_TLSGD_HA: return "got@tlsgd@ha";
+ case VK_PPC_TLSGD: return "tlsgd";
+ case VK_PPC_GOT_TLSLD: return "got@tlsld";
+ case VK_PPC_GOT_TLSLD_LO: return "got@tlsld@l";
+ 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_GOT_DISP: return "GOT_DISP";
case VK_Mips_GOT_PAGE: return "GOT_PAGE";
case VK_Mips_GOT_OFST: return "GOT_OFST";
+ case VK_Mips_HIGHER: return "HIGHER";
+ case VK_Mips_HIGHEST: return "HIGHEST";
+ case VK_Mips_GOT_HI16: return "GOT_HI16";
+ case VK_Mips_GOT_LO16: return "GOT_LO16";
+ case VK_Mips_CALL_HI16: return "CALL_HI16";
+ 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 "IMGREL";
+ case VK_Hexagon_PCREL: return "PCREL";
+ case VK_Hexagon_LO16: return "LO16";
+ case VK_Hexagon_HI16: return "HI16";
+ case VK_Hexagon_GPREL: return "GPREL";
+ case VK_Hexagon_GD_GOT: return "GDGOT";
+ case VK_Hexagon_LD_GOT: return "LDGOT";
+ case VK_Hexagon_GD_PLT: return "GDPLT";
+ case VK_Hexagon_LD_PLT: return "LDPLT";
+ case VK_Hexagon_IE: return "IE";
+ case VK_Hexagon_IE_GOT: return "IEGOT";
+ case VK_TPREL: return "tprel";
+ case VK_DTPREL: return "dtprel";
}
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("GOTTPOFF", VK_GOTTPOFF)
+ .Case("got_prel", VK_GOTPCREL)
.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("tlvppageoff", VK_TLVPPAGEOFF)
+ .Case("page", VK_PAGE)
+ .Case("pageoff", VK_PAGEOFF)
+ .Case("gotpage", VK_GOTPAGE)
+ .Case("gotpageoff", VK_GOTPAGEOFF)
+ .Case("imgrel", VK_COFF_IMGREL32)
+ .Case("secrel32", VK_SECREL)
+ .Case("size", VK_SIZE)
+ .Case("l", VK_PPC_LO)
+ .Case("h", VK_PPC_HI)
+ .Case("ha", VK_PPC_HA)
+ .Case("higher", VK_PPC_HIGHER)
+ .Case("highera", VK_PPC_HIGHERA)
+ .Case("highest", VK_PPC_HIGHEST)
+ .Case("highesta", VK_PPC_HIGHESTA)
+ .Case("got@l", VK_PPC_GOT_LO)
+ .Case("got@h", VK_PPC_GOT_HI)
+ .Case("got@ha", VK_PPC_GOT_HA)
+ .Case("local", VK_PPC_LOCAL)
+ .Case("tocbase", VK_PPC_TOCBASE)
+ .Case("toc", VK_PPC_TOC)
+ .Case("toc@l", VK_PPC_TOC_LO)
+ .Case("toc@h", VK_PPC_TOC_HI)
+ .Case("toc@ha", VK_PPC_TOC_HA)
+ .Case("tls", VK_PPC_TLS)
+ .Case("dtpmod", VK_PPC_DTPMOD)
+ .Case("tprel", VK_PPC_TPREL)
+ .Case("tprel@l", VK_PPC_TPREL_LO)
+ .Case("tprel@h", VK_PPC_TPREL_HI)
+ .Case("tprel@ha", VK_PPC_TPREL_HA)
+ .Case("tprel@higher", VK_PPC_TPREL_HIGHER)
+ .Case("tprel@highera", VK_PPC_TPREL_HIGHERA)
+ .Case("tprel@highest", VK_PPC_TPREL_HIGHEST)
+ .Case("tprel@highesta", VK_PPC_TPREL_HIGHESTA)
+ .Case("dtprel", VK_PPC_DTPREL)
+ .Case("dtprel@l", VK_PPC_DTPREL_LO)
+ .Case("dtprel@h", VK_PPC_DTPREL_HI)
+ .Case("dtprel@ha", VK_PPC_DTPREL_HA)
+ .Case("dtprel@higher", VK_PPC_DTPREL_HIGHER)
+ .Case("dtprel@highera", VK_PPC_DTPREL_HIGHERA)
+ .Case("dtprel@highest", VK_PPC_DTPREL_HIGHEST)
+ .Case("dtprel@highesta", VK_PPC_DTPREL_HIGHESTA)
+ .Case("got@tprel", VK_PPC_GOT_TPREL)
+ .Case("got@tprel@l", VK_PPC_GOT_TPREL_LO)
+ .Case("got@tprel@h", VK_PPC_GOT_TPREL_HI)
+ .Case("got@tprel@ha", VK_PPC_GOT_TPREL_HA)
+ .Case("got@dtprel", VK_PPC_GOT_DTPREL)
+ .Case("got@dtprel@l", VK_PPC_GOT_DTPREL_LO)
+ .Case("got@dtprel@h", VK_PPC_GOT_DTPREL_HI)
+ .Case("got@dtprel@ha", VK_PPC_GOT_DTPREL_HA)
+ .Case("got@tlsgd", VK_PPC_GOT_TLSGD)
+ .Case("got@tlsgd@l", VK_PPC_GOT_TLSGD_LO)
+ .Case("got@tlsgd@h", VK_PPC_GOT_TLSGD_HI)
+ .Case("got@tlsgd@ha", VK_PPC_GOT_TLSGD_HA)
+ .Case("got@tlsld", VK_PPC_GOT_TLSLD)
+ .Case("got@tlsld@l", VK_PPC_GOT_TLSLD_LO)
+ .Case("got@tlsld@h", VK_PPC_GOT_TLSLD_HI)
+ .Case("got@tlsld@ha", VK_PPC_GOT_TLSLD_HA)
+ .Case("none", VK_ARM_NONE)
+ .Case("target1", VK_ARM_TARGET1)
+ .Case("target2", VK_ARM_TARGET2)
+ .Case("prel31", VK_ARM_PREL31)
+ .Case("sbrel", VK_ARM_SBREL)
+ .Case("tlsldo", VK_ARM_TLSLDO)
+ .Case("tlscall", VK_ARM_TLSCALL)
+ .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() {}
+void MCTargetExpr::anchor() {}
/* *** */
-bool MCExpr::EvaluateAsAbsolute(int64_t &Res) const {
- return EvaluateAsAbsolute(Res, 0, 0, 0);
+bool MCExpr::evaluateAsAbsolute(int64_t &Res) const {
+ return evaluateAsAbsolute(Res, nullptr, nullptr, nullptr);
}
-bool MCExpr::EvaluateAsAbsolute(int64_t &Res,
+bool MCExpr::evaluateAsAbsolute(int64_t &Res,
const MCAsmLayout &Layout) const {
- return EvaluateAsAbsolute(Res, &Layout.getAssembler(), &Layout, 0);
+ return evaluateAsAbsolute(Res, &Layout.getAssembler(), &Layout, nullptr);
}
-bool MCExpr::EvaluateAsAbsolute(int64_t &Res,
+bool MCExpr::evaluateAsAbsolute(int64_t &Res,
const MCAsmLayout &Layout,
const SectionAddrMap &Addrs) const {
- return EvaluateAsAbsolute(Res, &Layout.getAssembler(), &Layout, &Addrs);
+ return evaluateAsAbsolute(Res, &Layout.getAssembler(), &Layout, &Addrs);
}
-bool MCExpr::EvaluateAsAbsolute(int64_t &Res, const MCAssembler &Asm) const {
- return EvaluateAsAbsolute(Res, &Asm, 0, 0);
+bool MCExpr::evaluateAsAbsolute(int64_t &Res, const MCAssembler &Asm) const {
+ return evaluateAsAbsolute(Res, &Asm, nullptr, nullptr);
}
-bool MCExpr::EvaluateAsAbsolute(int64_t &Res, const MCAssembler *Asm,
+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);
+ 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;
if (SA.isUndefined() || SB.isUndefined())
return;
- if (!Asm->getWriter().IsSymbolRefDifferenceFullyResolved(*Asm, A, B, InSet))
+ if (!Asm->getWriter().isSymbolRefDifferenceFullyResolved(*Asm, A, B, InSet))
return;
- MCSymbolData &AD = Asm->getSymbolData(SA);
- MCSymbolData &BD = Asm->getSymbolData(SB);
-
- if (AD.getFragment() == BD.getFragment()) {
- Addend += (AD.getOffset() - BD.getOffset());
+ if (SA.getFragment() == SB.getFragment()) {
+ Addend += (SA.getOffset() - SB.getOffset());
// Pointers to Thumb symbols need to have their low-bit set to allow
// for interworking.
// Clear the symbol expr pointers to indicate we have folded these
// operands.
- A = B = 0;
+ A = B = nullptr;
return;
}
if (!Layout)
return;
- const MCSectionData &SecA = *AD.getFragment()->getParent();
- const MCSectionData &SecB = *BD.getFragment()->getParent();
+ const MCSection &SecA = *SA.getFragment()->getParent();
+ const MCSection &SecB = *SB.getFragment()->getParent();
if ((&SecA != &SecB) && !Addrs)
return;
// Eagerly evaluate.
- Addend += (Layout->getSymbolOffset(&Asm->getSymbolData(A->getSymbol())) -
- Layout->getSymbolOffset(&Asm->getSymbolData(B->getSymbol())));
+ Addend += Layout->getSymbolOffset(A->getSymbol()) -
+ Layout->getSymbolOffset(B->getSymbol());
if (Addrs && (&SecA != &SecB))
Addend += (Addrs->lookup(&SecA) - Addrs->lookup(&SecB));
+ // Pointers to Thumb symbols need to have their low-bit set to allow
+ // for interworking.
+ if (Asm->isThumbFunc(&SA))
+ Addend |= 1;
+
// Clear the symbol expr pointers to indicate we have folded these
// operands.
- A = B = 0;
+ A = B = nullptr;
}
/// \brief Evaluate the result of an add between (conceptually) two MCValues.
/// 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();
return true;
}
-bool MCExpr::EvaluateAsRelocatable(MCValue &Res,
- const MCAsmLayout &Layout) const {
- return EvaluateAsRelocatableImpl(Res, &Layout.getAssembler(), &Layout,
- 0, false);
+bool MCExpr::evaluateAsRelocatable(MCValue &Res,
+ const MCAsmLayout *Layout,
+ const MCFixup *Fixup) const {
+ MCAssembler *Assembler = Layout ? &Layout->getAssembler() : nullptr;
+ return evaluateAsRelocatableImpl(Res, Assembler, Layout, Fixup, nullptr,
+ false);
+}
+
+bool MCExpr::evaluateAsValue(MCValue &Res, const MCAsmLayout &Layout) const {
+ MCAssembler *Assembler = &Layout.getAssembler();
+ return evaluateAsRelocatableImpl(Res, Assembler, &Layout, nullptr, nullptr,
+ true);
}
-bool MCExpr::EvaluateAsRelocatableImpl(MCValue &Res,
- const MCAssembler *Asm,
+static bool canExpand(const MCSymbol &Sym, const MCAssembler *Asm, bool InSet) {
+ const MCExpr *Expr = Sym.getVariableValue();
+ const auto *Inner = dyn_cast<MCSymbolRefExpr>(Expr);
+ if (Inner) {
+ if (Inner->getKind() == MCSymbolRefExpr::VK_WEAKREF)
+ return false;
+ }
+
+ if (InSet)
+ return true;
+ if (!Asm)
+ return false;
+ return !Asm->getWriter().isWeak(Sym);
+}
+
+bool MCExpr::evaluateAsRelocatableImpl(MCValue &Res, const MCAssembler *Asm,
const MCAsmLayout *Layout,
+ 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());
const MCSymbol &Sym = SRE->getSymbol();
// Evaluate recursively if this is a variable.
- if (Sym.isVariable() && SRE->getKind() == MCSymbolRefExpr::VK_None) {
- bool Ret = Sym.getVariableValue()->EvaluateAsRelocatableImpl(Res, Asm,
- Layout,
- Addrs,
- true);
- // If we failed to simplify this to a constant, let the target
- // handle it.
- if (Ret && !Res.getSymA() && !Res.getSymB())
- return true;
+ if (Sym.isVariable() && SRE->getKind() == MCSymbolRefExpr::VK_None &&
+ canExpand(Sym, Asm, InSet)) {
+ bool IsMachO = SRE->hasSubsectionsViaSymbols();
+ if (Sym.getVariableValue()->evaluateAsRelocatableImpl(
+ Res, Asm, Layout, Fixup, Addrs, InSet || IsMachO)) {
+ if (!IsMachO)
+ return true;
+
+ const MCSymbolRefExpr *A = Res.getSymA();
+ const MCSymbolRefExpr *B = Res.getSymB();
+ // 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;
+ }
}
- Res = MCValue::get(SRE, 0, 0);
+ Res = MCValue::get(SRE, nullptr, 0);
return true;
}
const MCUnaryExpr *AUE = cast<MCUnaryExpr>(this);
MCValue Value;
- if (!AUE->getSubExpr()->EvaluateAsRelocatableImpl(Value, Asm, Layout,
+ if (!AUE->getSubExpr()->evaluateAsRelocatableImpl(Value, Asm, Layout, Fixup,
Addrs, InSet))
return false;
const MCBinaryExpr *ABE = cast<MCBinaryExpr>(this);
MCValue LHSValue, RHSValue;
- if (!ABE->getLHS()->EvaluateAsRelocatableImpl(LHSValue, Asm, Layout,
+ if (!ABE->getLHS()->evaluateAsRelocatableImpl(LHSValue, Asm, Layout, Fixup,
Addrs, InSet) ||
- !ABE->getRHS()->EvaluateAsRelocatableImpl(RHSValue, Asm, Layout,
+ !ABE->getRHS()->evaluateAsRelocatableImpl(RHSValue, Asm, Layout, Fixup,
Addrs, InSet))
return false;
// 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);
}
}
// FIXME: We need target hooks for the evaluation. It may be limited in
- // width, and gas defines the result of comparisons and right shifts
- // differently from Apple as.
+ // width, and gas defines the result of comparisons differently from
+ // Apple as.
int64_t LHS = LHSValue.getConstant(), RHS = RHSValue.getConstant();
int64_t Result = 0;
switch (ABE->getOpcode()) {
+ case MCBinaryExpr::AShr: Result = LHS >> RHS; break;
case MCBinaryExpr::Add: Result = LHS + RHS; break;
case MCBinaryExpr::And: Result = LHS & RHS; break;
- case MCBinaryExpr::Div: Result = LHS / RHS; break;
+ case MCBinaryExpr::Div:
+ // Handle division by zero. gas just emits a warning and keeps going,
+ // we try to be stricter.
+ // FIXME: Currently the caller of this function has no way to understand
+ // we're bailing out because of 'division by zero'. Therefore, it will
+ // emit a 'expected relocatable expression' error. It would be nice to
+ // change this code to emit a better diagnostic.
+ if (RHS == 0)
+ return false;
+ Result = LHS / RHS;
+ break;
case MCBinaryExpr::EQ: Result = LHS == RHS; break;
case MCBinaryExpr::GT: Result = LHS > RHS; break;
case MCBinaryExpr::GTE: Result = LHS >= RHS; break;
case MCBinaryExpr::LAnd: Result = LHS && RHS; break;
case MCBinaryExpr::LOr: Result = LHS || RHS; break;
+ case MCBinaryExpr::LShr: Result = uint64_t(LHS) >> uint64_t(RHS); break;
case MCBinaryExpr::LT: Result = LHS < RHS; break;
case MCBinaryExpr::LTE: Result = LHS <= RHS; break;
case MCBinaryExpr::Mod: Result = LHS % RHS; break;
case MCBinaryExpr::Mul: Result = LHS * RHS; break;
case MCBinaryExpr::NE: Result = LHS != RHS; break;
case MCBinaryExpr::Or: Result = LHS | RHS; break;
- case MCBinaryExpr::Shl: Result = LHS << RHS; break;
- case MCBinaryExpr::Shr: Result = LHS >> RHS; break;
+ case MCBinaryExpr::Shl: Result = uint64_t(LHS) << uint64_t(RHS); break;
case MCBinaryExpr::Sub: Result = LHS - RHS; break;
case MCBinaryExpr::Xor: Result = LHS ^ RHS; break;
}
llvm_unreachable("Invalid assembly expression kind!");
}
-const MCSection *MCExpr::FindAssociatedSection() const {
+MCSection *MCExpr::findAssociatedSection() const {
switch (getKind()) {
case Target:
// We never look through target specific expressions.
- return cast<MCTargetExpr>(this)->FindAssociatedSection();
+ return cast<MCTargetExpr>(this)->findAssociatedSection();
case Constant:
return MCSymbol::AbsolutePseudoSection;
if (Sym.isDefined())
return &Sym.getSection();
- return 0;
+ return nullptr;
}
case Unary:
- return cast<MCUnaryExpr>(this)->getSubExpr()->FindAssociatedSection();
+ return cast<MCUnaryExpr>(this)->getSubExpr()->findAssociatedSection();
case Binary: {
const MCBinaryExpr *BE = cast<MCBinaryExpr>(this);
- const MCSection *LHS_S = BE->getLHS()->FindAssociatedSection();
- const MCSection *RHS_S = BE->getRHS()->FindAssociatedSection();
+ MCSection *LHS_S = BE->getLHS()->findAssociatedSection();
+ MCSection *RHS_S = BE->getRHS()->findAssociatedSection();
// If either section is absolute, return the other.
if (LHS_S == MCSymbol::AbsolutePseudoSection)
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;
}
projects / oota-llvm.git / blobdiff