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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
...

llvm-svn: 80905
This commit is contained in:
Chris Lattner 2009-09-03 07:30:56 +00:00
parent 1b38952c99
commit c7b00730ad
1 changed files with 26 additions and 15 deletions
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41
llvm/lib/Target/X86/AsmPrinter/X86MCInstLower.cpp
View File

@ -160,7 +160,10 @@ GetConstantPoolIndexSymbol(const MachineOperand &MO) {
MCOperand X86ATTAsmPrinter::LowerSymbolOperand(const MachineOperand &MO,
MCSymbol *Sym) {
MCSymbol *NegatedSymbol = 0;
// FIXME: We would like an efficient form for this, so we don't have to do a
// lot of extra uniquing.
const MCExpr *Expr = MCSymbolRefExpr::Create(Sym, OutContext);
switch (MO.getTargetFlags()) {
default: llvm_unreachable("Unknown target flag on GV operand");
case X86II::MO_NO_FLAG: // No flag.
@ -183,24 +186,32 @@ MCOperand X86ATTAsmPrinter::LowerSymbolOperand(const MachineOperand &MO,
case X86II::MO_DARWIN_NONLAZY_PIC_BASE:
case X86II::MO_DARWIN_HIDDEN_NONLAZY_PIC_BASE:
// Subtract the pic base.
NegatedSymbol = GetPICBaseSymbol();
Expr = MCBinaryExpr::CreateSub(Expr,
MCSymbolRefExpr::Create(GetPICBaseSymbol(),
OutContext),
OutContext);
break;
case X86II::MO_GOT_ABSOLUTE_ADDRESS:
assert(0 && "Reloc mode unimp!");
//O << " + [.-";
//PrintPICBaseSymbol();
//O << ']';
case X86II::MO_GOT_ABSOLUTE_ADDRESS: {
// For this, we want to print something like:
// MYSYMBOL + (. - PICBASE)
// However, we can't generate a ".", so just emit a new label here and refer
// to it. We know that this operand flag occurs at most once per function.
SmallString<64> Name;
raw_svector_ostream(Name) << MAI->getPrivateGlobalPrefix() << "picbaseref"
<< getFunctionNumber();
MCSymbol *DotSym = OutContext.GetOrCreateSymbol(Name.str());
OutStreamer.EmitLabel(DotSym);
const MCExpr *DotExpr = MCSymbolRefExpr::Create(DotSym, OutContext);
const MCExpr *PICBase = MCSymbolRefExpr::Create(GetPICBaseSymbol(),
OutContext);
DotExpr = MCBinaryExpr::CreateSub(DotExpr, PICBase, OutContext);
Expr = MCBinaryExpr::CreateAdd(Expr, DotExpr, OutContext);
break;
}
}
// FIXME: We would like an efficient form for this, so we don't have to do a
// lot of extra uniquing.
const MCExpr *Expr = MCSymbolRefExpr::Create(Sym, OutContext);
if (NegatedSymbol)
Expr = MCBinaryExpr::CreateSub(Expr, MCSymbolRefExpr::Create(NegatedSymbol,
OutContext),
OutContext);
if (!MO.isSymbol() && MO.getOffset())
if (MO.getOffset())
Expr = MCBinaryExpr::CreateAdd(Expr, MCConstantExpr::Create(MO.getOffset(),
OutContext),
OutContext);