- // 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;
+ DebugLoc DL = Op.getDebugLoc();
+ SDValue Result = DAG.getTargetGlobalAddress(GA->getGlobal(), DL,
+ getPointerTy(),
+ GA->getOffset(), OpFlag);
+ 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);