//
//===----------------------------------------------------------------------===//
-#include "ARMMCInstLower.h"
-//#include "llvm/CodeGen/MachineModuleInfoImpls.h"
-#include "llvm/CodeGen/AsmPrinter.h"
+#include "ARM.h"
+#include "ARMAsmPrinter.h"
+#include "MCTargetDesc/ARMBaseInfo.h"
+#include "MCTargetDesc/ARMMCExpr.h"
#include "llvm/CodeGen/MachineBasicBlock.h"
-#include "llvm/MC/MCAsmInfo.h"
-#include "llvm/MC/MCContext.h"
+#include "llvm/IR/Constants.h"
+#include "llvm/IR/Mangler.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCInst.h"
-//#include "llvm/MC/MCStreamer.h"
-#include "llvm/Target/Mangler.h"
-#include "llvm/Support/raw_ostream.h"
-#include "llvm/ADT/SmallString.h"
using namespace llvm;
-#if 0
-const ARMSubtarget &ARMMCInstLower::getSubtarget() const {
- return AsmPrinter.getSubtarget();
-}
-
-MachineModuleInfoMachO &ARMMCInstLower::getMachOMMI() const {
- assert(getSubtarget().isTargetDarwin() &&"Can only get MachO info on darwin");
- return AsmPrinter.MMI->getObjFileInfo<MachineModuleInfoMachO>();
-}
-#endif
-
-MCSymbol *ARMMCInstLower::
-GetGlobalAddressSymbol(const MachineOperand &MO) const {
- // FIXME: HANDLE PLT references how??
- switch (MO.getTargetFlags()) {
- default: assert(0 && "Unknown target flag on GV operand");
- case 0: break;
+MCOperand ARMAsmPrinter::GetSymbolRef(const MachineOperand &MO,
+ const MCSymbol *Symbol) {
+ const MCExpr *Expr;
+ unsigned Option = MO.getTargetFlags() & ARMII::MO_OPTION_MASK;
+ switch (Option) {
+ default: {
+ Expr = MCSymbolRefExpr::create(Symbol, MCSymbolRefExpr::VK_None,
+ OutContext);
+ switch (Option) {
+ default: llvm_unreachable("Unknown target flag on symbol operand");
+ case ARMII::MO_NO_FLAG:
+ break;
+ case ARMII::MO_LO16:
+ Expr = MCSymbolRefExpr::create(Symbol, MCSymbolRefExpr::VK_None,
+ OutContext);
+ Expr = ARMMCExpr::createLower16(Expr, OutContext);
+ break;
+ case ARMII::MO_HI16:
+ Expr = MCSymbolRefExpr::create(Symbol, MCSymbolRefExpr::VK_None,
+ OutContext);
+ Expr = ARMMCExpr::createUpper16(Expr, OutContext);
+ break;
+ }
+ break;
}
- return Printer.Mang->getSymbol(MO.getGlobal());
-}
-
-MCSymbol *ARMMCInstLower::
-GetExternalSymbolSymbol(const MachineOperand &MO) const {
- // FIXME: HANDLE PLT references how??
- switch (MO.getTargetFlags()) {
- default: assert(0 && "Unknown target flag on GV operand");
- case 0: break;
+ case ARMII::MO_PLT:
+ Expr = MCSymbolRefExpr::create(Symbol, MCSymbolRefExpr::VK_PLT,
+ OutContext);
+ break;
}
- return Printer.GetExternalSymbolSymbol(MO.getSymbolName());
-}
-
-
-
-MCSymbol *ARMMCInstLower::
-GetJumpTableSymbol(const MachineOperand &MO) const {
- SmallString<256> Name;
- raw_svector_ostream(Name) << Printer.MAI->getPrivateGlobalPrefix() << "JTI"
- << Printer.getFunctionNumber() << '_' << MO.getIndex();
-
-#if 0
- switch (MO.getTargetFlags()) {
- default: llvm_unreachable("Unknown target flag on GV operand");
- }
-#endif
+ if (!MO.isJTI() && MO.getOffset())
+ Expr = MCBinaryExpr::createAdd(Expr,
+ MCConstantExpr::create(MO.getOffset(),
+ OutContext),
+ OutContext);
+ return MCOperand::createExpr(Expr);
- // Create a symbol for the name.
- return Ctx.GetOrCreateSymbol(Name.str());
}
-MCSymbol *ARMMCInstLower::
-GetConstantPoolIndexSymbol(const MachineOperand &MO) const {
- SmallString<256> Name;
- raw_svector_ostream(Name) << Printer.MAI->getPrivateGlobalPrefix() << "CPI"
- << Printer.getFunctionNumber() << '_' << MO.getIndex();
-
-#if 0
- switch (MO.getTargetFlags()) {
- default: llvm_unreachable("Unknown target flag on GV operand");
+bool ARMAsmPrinter::lowerOperand(const MachineOperand &MO,
+ MCOperand &MCOp) {
+ switch (MO.getType()) {
+ default: llvm_unreachable("unknown operand type");
+ case MachineOperand::MO_Register:
+ // Ignore all non-CPSR implicit register operands.
+ if (MO.isImplicit() && MO.getReg() != ARM::CPSR)
+ return false;
+ assert(!MO.getSubReg() && "Subregs should be eliminated!");
+ MCOp = MCOperand::createReg(MO.getReg());
+ break;
+ case MachineOperand::MO_Immediate:
+ MCOp = MCOperand::createImm(MO.getImm());
+ break;
+ case MachineOperand::MO_MachineBasicBlock:
+ MCOp = MCOperand::createExpr(MCSymbolRefExpr::create(
+ MO.getMBB()->getSymbol(), OutContext));
+ break;
+ case MachineOperand::MO_GlobalAddress: {
+ MCOp = GetSymbolRef(MO,
+ GetARMGVSymbol(MO.getGlobal(), MO.getTargetFlags()));
+ break;
}
-#endif
-
- // Create a symbol for the name.
- return Ctx.GetOrCreateSymbol(Name.str());
-}
-
-MCOperand ARMMCInstLower::
-LowerSymbolOperand(const MachineOperand &MO, MCSymbol *Sym) const {
- // 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, Ctx);
-
-#if 0
- switch (MO.getTargetFlags()) {
- default: llvm_unreachable("Unknown target flag on GV operand");
+ case MachineOperand::MO_ExternalSymbol:
+ MCOp = GetSymbolRef(MO,
+ GetExternalSymbolSymbol(MO.getSymbolName()));
+ break;
+ case MachineOperand::MO_JumpTableIndex:
+ MCOp = GetSymbolRef(MO, GetJTISymbol(MO.getIndex()));
+ break;
+ case MachineOperand::MO_ConstantPoolIndex:
+ MCOp = GetSymbolRef(MO, GetCPISymbol(MO.getIndex()));
+ break;
+ case MachineOperand::MO_BlockAddress:
+ MCOp = GetSymbolRef(MO, GetBlockAddressSymbol(MO.getBlockAddress()));
+ break;
+ case MachineOperand::MO_FPImmediate: {
+ APFloat Val = MO.getFPImm()->getValueAPF();
+ bool ignored;
+ Val.convert(APFloat::IEEEdouble, APFloat::rmTowardZero, &ignored);
+ MCOp = MCOperand::createFPImm(Val.convertToDouble());
+ break;
}
-#endif
-
- if (!MO.isJTI() && MO.getOffset())
- Expr = MCBinaryExpr::CreateAdd(Expr,
- MCConstantExpr::Create(MO.getOffset(), Ctx),
- Ctx);
- return MCOperand::CreateExpr(Expr);
+ case MachineOperand::MO_RegisterMask:
+ // Ignore call clobbers.
+ return false;
+ }
+ return true;
}
-
-void ARMMCInstLower::Lower(const MachineInstr *MI, MCInst &OutMI) const {
+void llvm::LowerARMMachineInstrToMCInst(const MachineInstr *MI, MCInst &OutMI,
+ ARMAsmPrinter &AP) {
OutMI.setOpcode(MI->getOpcode());
+ // In the MC layer, we keep modified immediates in their encoded form
+ bool EncodeImms = false;
+ switch (MI->getOpcode()) {
+ default: break;
+ case ARM::MOVi:
+ case ARM::MVNi:
+ case ARM::CMPri:
+ case ARM::CMNri:
+ case ARM::TSTri:
+ case ARM::TEQri:
+ case ARM::MSRi:
+ case ARM::ADCri:
+ case ARM::ADDri:
+ case ARM::ADDSri:
+ case ARM::SBCri:
+ case ARM::SUBri:
+ case ARM::SUBSri:
+ case ARM::ANDri:
+ case ARM::ORRri:
+ case ARM::EORri:
+ case ARM::BICri:
+ case ARM::RSBri:
+ case ARM::RSBSri:
+ case ARM::RSCri:
+ EncodeImms = true;
+ break;
+ }
+
for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
const MachineOperand &MO = MI->getOperand(i);
MCOperand MCOp;
- switch (MO.getType()) {
- default:
- MI->dump();
- assert(0 && "unknown operand type");
- case MachineOperand::MO_Register:
- // Ignore all implicit register operands.
- if (MO.isImplicit()) continue;
- assert(!MO.getSubReg() && "Subregs should be eliminated!");
- MCOp = MCOperand::CreateReg(MO.getReg());
- break;
- case MachineOperand::MO_Immediate:
- MCOp = MCOperand::CreateImm(MO.getImm());
- break;
- case MachineOperand::MO_MachineBasicBlock:
- MCOp = MCOperand::CreateExpr(MCSymbolRefExpr::Create(
- MO.getMBB()->getSymbol(), Ctx));
- break;
- case MachineOperand::MO_GlobalAddress:
- MCOp = LowerSymbolOperand(MO, GetGlobalAddressSymbol(MO));
- break;
- case MachineOperand::MO_ExternalSymbol:
- MCOp = LowerSymbolOperand(MO, GetExternalSymbolSymbol(MO));
- break;
- case MachineOperand::MO_JumpTableIndex:
- MCOp = LowerSymbolOperand(MO, GetJumpTableSymbol(MO));
- break;
- case MachineOperand::MO_ConstantPoolIndex:
- MCOp = LowerSymbolOperand(MO, GetConstantPoolIndexSymbol(MO));
- break;
- case MachineOperand::MO_BlockAddress:
- MCOp = LowerSymbolOperand(MO, Printer.GetBlockAddressSymbol(
- MO.getBlockAddress()));
- break;
+ if (AP.lowerOperand(MO, MCOp)) {
+ if (MCOp.isImm() && EncodeImms) {
+ int32_t Enc = ARM_AM::getSOImmVal(MCOp.getImm());
+ if (Enc != -1)
+ MCOp.setImm(Enc);
+ }
+ OutMI.addOperand(MCOp);
}
-
- OutMI.addOperand(MCOp);
}
-
}
projects / oota-llvm.git / blobdiff