//
//===----------------------------------------------------------------------===//
-#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/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
-#include "llvm/Target/TargetAsmBackend.h"
using namespace llvm;
+#define DEBUG_TYPE "mcexpr"
+
namespace {
namespace stats {
STATISTIC(MCExprEvaluate, "Number of MCExpr evaluations");
// Parenthesize names that start with $ so that they don't look like
// absolute names.
bool UseParens = Sym.getName()[0] == '$';
-
- if (SRE.getKind() == MCSymbolRefExpr::VK_PPC_HA16 ||
- SRE.getKind() == MCSymbolRefExpr::VK_PPC_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)
- OS << MCSymbolRefExpr::getVariantKindName(SRE.getKind());
- else if (SRE.getKind() != MCSymbolRefExpr::VK_None &&
- SRE.getKind() != MCSymbolRefExpr::VK_PPC_HA16 &&
- SRE.getKind() != MCSymbolRefExpr::VK_PPC_LO16)
- OS << '@' << MCSymbolRefExpr::getVariantKindName(SRE.getKind());
+ if (SRE.getKind() != MCSymbolRefExpr::VK_None) {
+ if (SRE.getMCAsmInfo().useParensForSymbolVariant())
+ OS << '(' << MCSymbolRefExpr::getVariantKindName(SRE.getKind()) << ')';
+ else
+ OS << '@' << MCSymbolRefExpr::getVariantKindName(SRE.getKind());
+ }
return;
}
case MCExpr::Unary: {
const MCUnaryExpr &UE = cast<MCUnaryExpr>(*this);
switch (UE.getOpcode()) {
- default: assert(0 && "Invalid opcode!");
case MCUnaryExpr::LNot: OS << '!'; break;
case MCUnaryExpr::Minus: OS << '-'; break;
case MCUnaryExpr::Not: OS << '~'; break;
}
switch (BE.getOpcode()) {
- default: assert(0 && "Invalid opcode!");
case MCBinaryExpr::Add:
// Print "X-42" instead of "X+-42".
if (const MCConstantExpr *RHSC = dyn_cast<MCConstantExpr>(BE.getRHS())) {
}
}
- assert(0 && "Invalid expression kind!");
+ llvm_unreachable("Invalid expression kind!");
}
+#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
void MCExpr::dump() const {
print(dbgs());
dbgs() << '\n';
}
+#endif
/* *** */
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,
StringRef MCSymbolRefExpr::getVariantKindName(VariantKind Kind) {
switch (Kind) {
- default:
case VK_Invalid: return "<<invalid>>";
case VK_None: return "<<none>>";
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_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_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_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_HA16: return "ha16";
- case VK_PPC_LO16: return "lo16";
+ 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_Mips_GPREL: return "GPREL";
+ case VK_Mips_GOT_CALL: return "GOT_CALL";
+ case VK_Mips_GOT16: return "GOT16";
+ case VK_Mips_GOT: return "GOT";
+ case VK_Mips_ABS_HI: return "ABS_HI";
+ case VK_Mips_ABS_LO: return "ABS_LO";
+ case VK_Mips_TLSGD: return "TLSGD";
+ case VK_Mips_TLSLDM: return "TLSLDM";
+ case VK_Mips_DTPREL_HI: return "DTPREL_HI";
+ case VK_Mips_DTPREL_LO: return "DTPREL_LO";
+ case VK_Mips_GOTTPREL: return "GOTTPREL";
+ case VK_Mips_TPREL_HI: return "TPREL_HI";
+ case VK_Mips_TPREL_LO: return "TPREL_LO";
+ case VK_Mips_GPOFF_HI: return "GPOFF_HI";
+ case VK_Mips_GPOFF_LO: return "GPOFF_LO";
+ 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";
}
+ llvm_unreachable("Invalid variant kind");
}
MCSymbolRefExpr::VariantKind
.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("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("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("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("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 MCTargetExpr::Anchor() {}
+void MCTargetExpr::anchor() {}
/* *** */
bool MCExpr::EvaluateAsAbsolute(int64_t &Res) const {
- return EvaluateAsAbsolute(Res, 0, 0, 0);
+ return EvaluateAsAbsolute(Res, nullptr, nullptr, nullptr);
}
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 MCAssembler &Asm) const {
- return EvaluateAsAbsolute(Res, &Asm, 0, 0);
+ return EvaluateAsAbsolute(Res, &Asm, nullptr, nullptr);
+}
+
+int64_t MCExpr::evaluateKnownAbsolute(const MCAsmLayout &Layout) const {
+ int64_t Res;
+ bool Abs =
+ evaluateAsAbsolute(Res, &Layout.getAssembler(), &Layout, nullptr, true);
+ (void)Abs;
+ assert(Abs && "Not actually absolute");
+ return Res;
}
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);
+ bool IsRelocatable = EvaluateAsRelocatableImpl(
+ Value, Asm, Layout, nullptr, Addrs, InSet, /*ForceVarExpansion*/ false);
// Record the current value.
Res = Value.getConstant();
if (!Asm->getWriter().IsSymbolRefDifferenceFullyResolved(*Asm, A, B, InSet))
return;
- MCSymbolData &AD = Asm->getSymbolData(SA);
- MCSymbolData &BD = Asm->getSymbolData(SB);
+ const MCSymbolData &AD = Asm->getSymbolData(SA);
+ const MCSymbolData &BD = Asm->getSymbolData(SB);
if (AD.getFragment() == BD.getFragment()) {
Addend += (AD.getOffset() - BD.getOffset());
+ // 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;
return;
}
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.
// (LHS_A - RHS_B),
// (RHS_A - LHS_B),
// (RHS_A - RHS_B).
- // Since we are attempting to be as aggresive as possible about folding, we
+ // Since we are attempting to be as aggressive as possible about folding, we
// attempt to evaluate each possible alternative.
AttemptToFoldSymbolOffsetDifference(Asm, Layout, Addrs, InSet, LHS_A, LHS_B,
Result_Cst);
}
bool MCExpr::EvaluateAsRelocatable(MCValue &Res,
- const MCAsmLayout &Layout) const {
- return EvaluateAsRelocatableImpl(Res, &Layout.getAssembler(), &Layout,
- 0, false);
+ const MCAsmLayout *Layout,
+ const MCFixup *Fixup) const {
+ MCAssembler *Assembler = Layout ? &Layout->getAssembler() : nullptr;
+ return EvaluateAsRelocatableImpl(Res, Assembler, Layout, Fixup, nullptr,
+ false, /*ForceVarExpansion*/ false);
+}
+
+bool MCExpr::EvaluateAsValue(MCValue &Res, const MCAsmLayout *Layout,
+ const MCFixup *Fixup) const {
+ MCAssembler *Assembler = Layout ? &Layout->getAssembler() : nullptr;
+ return EvaluateAsRelocatableImpl(Res, Assembler, Layout, Fixup, nullptr,
+ false, /*ForceVarExpansion*/ true);
}
-bool MCExpr::EvaluateAsRelocatableImpl(MCValue &Res,
- const MCAssembler *Asm,
+bool MCExpr::EvaluateAsRelocatableImpl(MCValue &Res, const MCAssembler *Asm,
const MCAsmLayout *Layout,
- const SectionAddrMap *Addrs,
- bool InSet) const {
+ const MCFixup *Fixup,
+ const SectionAddrMap *Addrs, bool InSet,
+ bool ForceVarExpansion) 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) {
- 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.getVariableValue()->EvaluateAsRelocatableImpl(
+ Res, Asm, Layout, Fixup, Addrs, true, ForceVarExpansion)) {
+ 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;
+ }
+ }
}
- Res = MCValue::get(SRE, 0, 0);
+ Res = MCValue::get(SRE, nullptr, 0);
return true;
}
MCValue Value;
if (!AUE->getSubExpr()->EvaluateAsRelocatableImpl(Value, Asm, Layout,
- Addrs, InSet))
+ Fixup, Addrs, InSet,
+ ForceVarExpansion))
return false;
switch (AUE->getOpcode()) {
MCValue LHSValue, RHSValue;
if (!ABE->getLHS()->EvaluateAsRelocatableImpl(LHSValue, Asm, Layout,
- Addrs, InSet) ||
+ Fixup, Addrs, InSet,
+ ForceVarExpansion) ||
!ABE->getRHS()->EvaluateAsRelocatableImpl(RHSValue, Asm, Layout,
- Addrs, InSet))
+ Fixup, Addrs, InSet,
+ ForceVarExpansion))
return false;
// We only support a few operations on non-constant expressions, handle
}
}
- assert(0 && "Invalid assembly expression kind!");
- return false;
+ llvm_unreachable("Invalid assembly expression kind!");
+}
+
+const MCSection *MCExpr::FindAssociatedSection() const {
+ switch (getKind()) {
+ case Target:
+ // We never look through target specific expressions.
+ return cast<MCTargetExpr>(this)->FindAssociatedSection();
+
+ case Constant:
+ return MCSymbol::AbsolutePseudoSection;
+
+ case SymbolRef: {
+ const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(this);
+ const MCSymbol &Sym = SRE->getSymbol();
+
+ if (Sym.isDefined())
+ return &Sym.getSection();
+
+ return nullptr;
+ }
+
+ case Unary:
+ 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();
+
+ // If either section is absolute, return the other.
+ if (LHS_S == MCSymbol::AbsolutePseudoSection)
+ return RHS_S;
+ if (RHS_S == MCSymbol::AbsolutePseudoSection)
+ return LHS_S;
+
+ // Otherwise, return the first non-null section.
+ return LHS_S ? LHS_S : RHS_S;
+ }
+ }
+
+ llvm_unreachable("Invalid assembly expression kind!");
}
projects / oota-llvm.git / blobdiff