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add some rough support for making mcinst lowering work without an

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asmprinter or mangler around.  This is option #B for killing off 
X86InstrInfo::GetInstSizeInBytes.  Option #A (killing 
"needsexactsize") was sent for consideration to llvmdev.

llvm-svn: 109056
This commit is contained in:
Chris Lattner 2010-07-21 23:03:35 +00:00
parent e380b82a47
commit 418c190d93
1 changed files with 23 additions and 5 deletions
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28
lib/Target/X86/X86MCInstLower.cpp
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@ -320,20 +320,38 @@ void X86MCInstLower::Lower(const MachineInstr *MI, MCInst &OutMI) const {
MO.getMBB()->getSymbol(), Ctx));
break;
case MachineOperand::MO_GlobalAddress:
MCOp = LowerSymbolOperand(MO, GetSymbolFromOperand(MO));
// If we don't have an asmprinter, we're converting to MCInst to get
// instruction sizes, which doesn't need precise value information for
// symbols, just lower to a 0 immediate.
if (AsmPrinter != 0)
MCOp = LowerSymbolOperand(MO, GetSymbolFromOperand(MO));
else
MCOp = MCOperand::CreateImm(0);
break;
case MachineOperand::MO_ExternalSymbol:
MCOp = LowerSymbolOperand(MO, GetSymbolFromOperand(MO));
if (AsmPrinter != 0)
MCOp = LowerSymbolOperand(MO, GetSymbolFromOperand(MO));
else
MCOp = MCOperand::CreateImm(0);
break;
case MachineOperand::MO_JumpTableIndex:
MCOp = LowerSymbolOperand(MO, AsmPrinter->GetJTISymbol(MO.getIndex()));
if (AsmPrinter != 0)
MCOp = LowerSymbolOperand(MO, AsmPrinter->GetJTISymbol(MO.getIndex()));
else
MCOp = MCOperand::CreateImm(0);
break;
case MachineOperand::MO_ConstantPoolIndex:
MCOp = LowerSymbolOperand(MO, AsmPrinter->GetCPISymbol(MO.getIndex()));
if (AsmPrinter != 0)
MCOp = LowerSymbolOperand(MO, AsmPrinter->GetCPISymbol(MO.getIndex()));
else
MCOp = MCOperand::CreateImm(0);
break;
case MachineOperand::MO_BlockAddress:
MCOp = LowerSymbolOperand(MO,
if (AsmPrinter != 0)
MCOp = LowerSymbolOperand(MO,
AsmPrinter->GetBlockAddressSymbol(MO.getBlockAddress()));
else
MCOp = MCOperand::CreateImm(0);
break;
}