diff options
Diffstat (limited to 'lib/Target/X86/X86ISelLowering.cpp')
| -rw-r--r-- | lib/Target/X86/X86ISelLowering.cpp | 122 |
1 files changed, 100 insertions, 22 deletions
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp index 1d5997801d..eef773e233 100644 --- a/lib/Target/X86/X86ISelLowering.cpp +++ b/lib/Target/X86/X86ISelLowering.cpp @@ -5381,33 +5381,80 @@ static SDValue LowerToTLSExecModel(GlobalAddressSDNode *GA, SelectionDAG &DAG, SDValue X86TargetLowering::LowerGlobalTLSAddress(SDValue Op, SelectionDAG &DAG) const { - // TODO: implement the "local dynamic" model - // TODO: implement the "initial exec"model for pic executables - assert(Subtarget->isTargetELF() && - "TLS not implemented for non-ELF targets"); + GlobalAddressSDNode *GA = cast<GlobalAddressSDNode>(Op); const GlobalValue *GV = GA->getGlobal(); - // If GV is an alias then use the aliasee for determining - // thread-localness. - if (const GlobalAlias *GA = dyn_cast<GlobalAlias>(GV)) - GV = GA->resolveAliasedGlobal(false); - - TLSModel::Model model = getTLSModel(GV, - getTargetMachine().getRelocationModel()); - - switch (model) { - case TLSModel::GeneralDynamic: - case TLSModel::LocalDynamic: // not implemented - if (Subtarget->is64Bit()) - return LowerToTLSGeneralDynamicModel64(GA, DAG, getPointerTy()); - return LowerToTLSGeneralDynamicModel32(GA, DAG, getPointerTy()); + if (Subtarget->isTargetELF()) { + // TODO: implement the "local dynamic" model + // TODO: implement the "initial exec"model for pic executables + + // If GV is an alias then use the aliasee for determining + // thread-localness. + if (const GlobalAlias *GA = dyn_cast<GlobalAlias>(GV)) + GV = GA->resolveAliasedGlobal(false); + + TLSModel::Model model + = getTLSModel(GV, getTargetMachine().getRelocationModel()); + + switch (model) { + case TLSModel::GeneralDynamic: + case TLSModel::LocalDynamic: // not implemented + if (Subtarget->is64Bit()) + return LowerToTLSGeneralDynamicModel64(GA, DAG, getPointerTy()); + return LowerToTLSGeneralDynamicModel32(GA, DAG, getPointerTy()); + + case TLSModel::InitialExec: + case TLSModel::LocalExec: + return LowerToTLSExecModel(GA, DAG, getPointerTy(), model, + Subtarget->is64Bit()); + } + } else if (Subtarget->isTargetDarwin()) { + // Darwin only has one model of TLS. Lower to that. + unsigned char OpFlag = 0; + unsigned WrapperKind = Subtarget->isPICStyleRIPRel() ? + X86ISD::WrapperRIP : X86ISD::Wrapper; + + // In PIC mode (unless we're in RIPRel PIC mode) we add an offset to the + // global base reg. + bool PIC32 = (getTargetMachine().getRelocationModel() == Reloc::PIC_) && + !Subtarget->is64Bit(); + if (PIC32) + OpFlag = X86II::MO_TLVP_PIC_BASE; + else + OpFlag = X86II::MO_TLVP; + + SDValue Result = DAG.getTargetGlobalAddress(GA->getGlobal(), + getPointerTy(), + GA->getOffset(), OpFlag); + + DebugLoc DL = Op.getDebugLoc(); + SDValue Offset = DAG.getNode(WrapperKind, DL, getPointerTy(), Result); + + // With PIC32, the address is actually $g + Offset. + if (PIC32) + Offset = DAG.getNode(ISD::ADD, DL, getPointerTy(), + DAG.getNode(X86ISD::GlobalBaseReg, + DebugLoc(), getPointerTy()), + Offset); + + // Lowering the machine isd will make sure everything is in the right + // location. + SDValue Args[] = { Offset }; + SDValue Chain = DAG.getNode(X86ISD::TLSCALL, DL, MVT::Other, Args, 1); + + // TLSCALL will be codegen'ed as call. Inform MFI that function has calls. + MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo(); + MFI->setAdjustsStack(true); - case TLSModel::InitialExec: - case TLSModel::LocalExec: - return LowerToTLSExecModel(GA, DAG, getPointerTy(), model, - Subtarget->is64Bit()); + // And our return value (tls address) is in the standard call return value + // location. + unsigned Reg = Subtarget->is64Bit() ? X86::RAX : X86::EAX; + return DAG.getCopyFromReg(Chain, DL, Reg, getPointerTy()); } + + assert(false && + "TLS not implemented for this target."); llvm_unreachable("Unreachable"); return SDValue(); @@ -7748,6 +7795,7 @@ const char *X86TargetLowering::getTargetNodeName(unsigned Opcode) const { case X86ISD::FRSQRT: return "X86ISD::FRSQRT"; case X86ISD::FRCP: return "X86ISD::FRCP"; case X86ISD::TLSADDR: return "X86ISD::TLSADDR"; + case X86ISD::TLSCALL: return "X86ISD::TLSCALL"; case X86ISD::SegmentBaseAddress: return "X86ISD::SegmentBaseAddress"; case X86ISD::EH_RETURN: return "X86ISD::EH_RETURN"; case X86ISD::TC_RETURN: return "X86ISD::TC_RETURN"; @@ -8478,12 +8526,42 @@ X86TargetLowering::EmitLoweredMingwAlloca(MachineInstr *MI, } MachineBasicBlock * +X86TargetLowering::EmitLoweredTLSCall(MachineInstr *MI, + MachineBasicBlock *BB) const { + // This is pretty easy. We're taking the value that we received from + // our load from the relocation, sticking it in either RDI (x86-64) + // or EAX and doing an indirect call. The return value will then + // be in the normal return register. + const TargetInstrInfo *TII = getTargetMachine().getInstrInfo(); + DebugLoc DL = MI->getDebugLoc(); + MachineFunction *F = BB->getParent(); + + if (Subtarget->is64Bit()) { + MachineInstrBuilder MIB = BuildMI(BB, DL, TII->get(X86::MOV64rr), X86::RDI) + .addReg(MI->getOperand(0).getReg()); + MIB = BuildMI(BB, DL, TII->get(X86::CALL64m)); + addDirectMem(MIB, X86::RDI).addReg(0); + } else { + MachineInstrBuilder MIB = BuildMI(BB, DL, TII->get(X86::MOV32rr), X86::EAX) + .addReg(MI->getOperand(0).getReg()); + MIB = BuildMI(BB, DL, TII->get(X86::CALL32m)); + addDirectMem(MIB, X86::EAX).addReg(0); + } + + F->DeleteMachineInstr(MI); // The pseudo instruction is gone now. + return BB; +} + +MachineBasicBlock * X86TargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI, MachineBasicBlock *BB) const { switch (MI->getOpcode()) { default: assert(false && "Unexpected instr type to insert"); case X86::MINGW_ALLOCA: return EmitLoweredMingwAlloca(MI, BB); + case X86::TLSCall_32: + case X86::TLSCall_64: + return EmitLoweredTLSCall(MI, BB); case X86::CMOV_GR8: case X86::CMOV_V1I64: case X86::CMOV_FR32: |