+ // Get the offset of GA from the thread pointer, based on the TLS model.
+ SDValue Offset;
+ switch (model) {
+ case TLSModel::GeneralDynamic: {
+ // Load the GOT offset of the tls_index (module ID / per-symbol offset).
+ SystemZConstantPoolValue *CPV =
+ SystemZConstantPoolValue::Create(GV, SystemZCP::TLSGD);
+
+ Offset = DAG.getConstantPool(CPV, PtrVT, 8);
+ Offset = DAG.getLoad(PtrVT, DL, DAG.getEntryNode(),
+ Offset, MachinePointerInfo::getConstantPool(),
+ false, false, false, 0);
+
+ // Call __tls_get_offset to retrieve the offset.
+ Offset = lowerTLSGetOffset(Node, DAG, SystemZISD::TLS_GDCALL, Offset);
+ break;
+ }
+
+ case TLSModel::LocalDynamic: {
+ // Load the GOT offset of the module ID.
+ SystemZConstantPoolValue *CPV =
+ SystemZConstantPoolValue::Create(GV, SystemZCP::TLSLDM);
+
+ Offset = DAG.getConstantPool(CPV, PtrVT, 8);
+ Offset = DAG.getLoad(PtrVT, DL, DAG.getEntryNode(),
+ Offset, MachinePointerInfo::getConstantPool(),
+ false, false, false, 0);
+
+ // Call __tls_get_offset to retrieve the module base offset.
+ Offset = lowerTLSGetOffset(Node, DAG, SystemZISD::TLS_LDCALL, Offset);
+
+ // Note: The SystemZLDCleanupPass will remove redundant computations
+ // of the module base offset. Count total number of local-dynamic
+ // accesses to trigger execution of that pass.
+ SystemZMachineFunctionInfo* MFI =
+ DAG.getMachineFunction().getInfo<SystemZMachineFunctionInfo>();
+ MFI->incNumLocalDynamicTLSAccesses();
+
+ // Add the per-symbol offset.
+ CPV = SystemZConstantPoolValue::Create(GV, SystemZCP::DTPOFF);
+
+ SDValue DTPOffset = DAG.getConstantPool(CPV, PtrVT, 8);
+ DTPOffset = DAG.getLoad(PtrVT, DL, DAG.getEntryNode(),
+ DTPOffset, MachinePointerInfo::getConstantPool(),
+ false, false, false, 0);
+
+ Offset = DAG.getNode(ISD::ADD, DL, PtrVT, Offset, DTPOffset);
+ break;
+ }
+
+ case TLSModel::InitialExec: {
+ // Load the offset from the GOT.
+ Offset = DAG.getTargetGlobalAddress(GV, DL, PtrVT, 0,
+ SystemZII::MO_INDNTPOFF);
+ Offset = DAG.getNode(SystemZISD::PCREL_WRAPPER, DL, PtrVT, Offset);
+ Offset = DAG.getLoad(PtrVT, DL, DAG.getEntryNode(),
+ Offset, MachinePointerInfo::getGOT(),
+ false, false, false, 0);
+ break;
+ }