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handle the upper16/lower16 target operand flags on symbol references for MC

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instruction lowering.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@114191 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jim Grosbach
2010-09-17 18:25:25 +00:00
parent 40cc3f8783
commit c686e33d12
5 changed files with 60 additions and 23 deletions
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40
lib/Target/ARM/ARMMCInstLower.cpp
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@@ -40,20 +40,39 @@ MachineModuleInfoMachO &ARMMCInstLower::getMachOMMI() const {
}
#endif
MCSymbol *ARMMCInstLower::
GetGlobalAddressSymbol(const MachineOperand &MO) const {
MCSymbol *ARMMCInstLower::GetGlobalAddressSymbol(const GlobalValue *GV) const {
return Printer.Mang->getSymbol(GV);
}
const MCSymbolRefExpr *ARMMCInstLower::
GetSymbolRef(const MachineOperand &MO) const {
assert(MO.isGlobal() && "Isn't a global address reference?");
// FIXME: HANDLE PLT references how??
const MCSymbolRefExpr *SymRef;
const MCSymbol *Symbol = GetGlobalAddressSymbol(MO.getGlobal());
switch (MO.getTargetFlags()) {
default: assert(0 && "Unknown target flag on GV operand");
case 0: break;
case 0:
SymRef = MCSymbolRefExpr::Create(Symbol, MCSymbolRefExpr::VK_None, Ctx);
break;
case ARMII::MO_LO16:
SymRef = MCSymbolRefExpr::Create(Symbol, MCSymbolRefExpr::VK_ARM_LO16, Ctx);
break;
case ARMII::MO_HI16:
SymRef = MCSymbolRefExpr::Create(Symbol, MCSymbolRefExpr::VK_ARM_HI16, Ctx);
break;
}
return Printer.Mang->getSymbol(MO.getGlobal());
return SymRef;
}
MCSymbol *ARMMCInstLower::
GetExternalSymbolSymbol(const MachineOperand &MO) const {
// FIXME: HANDLE PLT references how??
// FIXME: This probably needs to be merged with the above SymbolRef stuff
// to handle :lower16: and :upper16: (?)
switch (MO.getTargetFlags()) {
default: assert(0 && "Unknown target flag on GV operand");
case 0: break;
@@ -115,6 +134,17 @@ LowerSymbolOperand(const MachineOperand &MO, MCSymbol *Sym) const {
return MCOperand::CreateExpr(Expr);
}
MCOperand ARMMCInstLower::
LowerSymbolRefOperand(const MachineOperand &MO,
const MCSymbolRefExpr *Sym) const {
const MCExpr *Expr = Sym;
if (!MO.isJTI() && MO.getOffset())
Expr = MCBinaryExpr::CreateAdd(Expr,
MCConstantExpr::Create(MO.getOffset(), Ctx),
Ctx);
return MCOperand::CreateExpr(Expr);
}
void ARMMCInstLower::Lower(const MachineInstr *MI, MCInst &OutMI) const {
OutMI.setOpcode(MI->getOpcode());
@@ -141,7 +171,7 @@ void ARMMCInstLower::Lower(const MachineInstr *MI, MCInst &OutMI) const {
MO.getMBB()->getSymbol(), Ctx));
break;
case MachineOperand::MO_GlobalAddress:
MCOp = LowerSymbolOperand(MO, GetGlobalAddressSymbol(MO));
MCOp = LowerSymbolRefOperand(MO, GetSymbolRef(MO));
break;
case MachineOperand::MO_ExternalSymbol:
MCOp = LowerSymbolOperand(MO, GetExternalSymbolSymbol(MO));