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Implement support for X86II::MO_GOT_ABSOLUTE_ADDRESS. We get very
different formatting from the old asmprinter, but it should be semantically the same. We used to get: popl %eax addl $_GLOBAL_OFFSET_TABLE_ + [.-.Lllvm$6.$piclabel], %eax ... Now we get: popl %eax .Lpicbaseref6: addl $(_GLOBAL_OFFSET_TABLE_ + (.Lpicbaseref6 - .Lllvm$6.$piclabel)), %eax ... git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80905 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -160,7 +160,10 @@ GetConstantPoolIndexSymbol(const MachineOperand &MO) {
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MCOperand X86ATTAsmPrinter::LowerSymbolOperand(const MachineOperand &MO,
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MCSymbol *Sym) {
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MCSymbol *NegatedSymbol = 0;
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// FIXME: We would like an efficient form for this, so we don't have to do a
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// lot of extra uniquing.
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const MCExpr *Expr = MCSymbolRefExpr::Create(Sym, OutContext);
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switch (MO.getTargetFlags()) {
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default: llvm_unreachable("Unknown target flag on GV operand");
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case X86II::MO_NO_FLAG: // No flag.
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@ -183,24 +186,32 @@ MCOperand X86ATTAsmPrinter::LowerSymbolOperand(const MachineOperand &MO,
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case X86II::MO_DARWIN_NONLAZY_PIC_BASE:
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case X86II::MO_DARWIN_HIDDEN_NONLAZY_PIC_BASE:
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// Subtract the pic base.
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NegatedSymbol = GetPICBaseSymbol();
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Expr = MCBinaryExpr::CreateSub(Expr,
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MCSymbolRefExpr::Create(GetPICBaseSymbol(),
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OutContext),
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OutContext);
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break;
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case X86II::MO_GOT_ABSOLUTE_ADDRESS:
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assert(0 && "Reloc mode unimp!");
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//O << " + [.-";
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//PrintPICBaseSymbol();
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//O << ']';
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case X86II::MO_GOT_ABSOLUTE_ADDRESS: {
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// For this, we want to print something like:
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// MYSYMBOL + (. - PICBASE)
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// However, we can't generate a ".", so just emit a new label here and refer
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// to it. We know that this operand flag occurs at most once per function.
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SmallString<64> Name;
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raw_svector_ostream(Name) << MAI->getPrivateGlobalPrefix() << "picbaseref"
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<< getFunctionNumber();
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MCSymbol *DotSym = OutContext.GetOrCreateSymbol(Name.str());
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OutStreamer.EmitLabel(DotSym);
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const MCExpr *DotExpr = MCSymbolRefExpr::Create(DotSym, OutContext);
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const MCExpr *PICBase = MCSymbolRefExpr::Create(GetPICBaseSymbol(),
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OutContext);
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DotExpr = MCBinaryExpr::CreateSub(DotExpr, PICBase, OutContext);
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Expr = MCBinaryExpr::CreateAdd(Expr, DotExpr, OutContext);
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break;
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}
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}
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// FIXME: We would like an efficient form for this, so we don't have to do a
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// lot of extra uniquing.
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const MCExpr *Expr = MCSymbolRefExpr::Create(Sym, OutContext);
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if (NegatedSymbol)
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Expr = MCBinaryExpr::CreateSub(Expr, MCSymbolRefExpr::Create(NegatedSymbol,
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OutContext),
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OutContext);
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if (!MO.isSymbol() && MO.getOffset())
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if (MO.getOffset())
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Expr = MCBinaryExpr::CreateAdd(Expr, MCConstantExpr::Create(MO.getOffset(),
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OutContext),
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OutContext);
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