bool selectIntrinsicRound(MachineInstr &I, MachineRegisterInfo &MRI) const;
bool selectJumpTable(MachineInstr &I, MachineRegisterInfo &MRI) const;
bool selectBrJT(MachineInstr &I, MachineRegisterInfo &MRI) const;
+ bool selectTLSGlobalValue(MachineInstr &I, MachineRegisterInfo &MRI) const;
unsigned emitConstantPoolEntry(Constant *CPVal, MachineFunction &MF) const;
MachineInstr *emitLoadFromConstantPool(Constant *CPVal,
case TargetOpcode::G_GLOBAL_VALUE: {
auto GV = I.getOperand(1).getGlobal();
- if (GV->isThreadLocal()) {
- // FIXME: we don't support TLS yet.
- return false;
- }
+ if (GV->isThreadLocal())
+ return selectTLSGlobalValue(I, MRI);
+
unsigned OpFlags = STI.ClassifyGlobalReference(GV, TM);
if (OpFlags & AArch64II::MO_GOT) {
I.setDesc(TII.get(AArch64::LOADgot));
return constrainSelectedInstRegOperands(*MovMI, TII, TRI, RBI);
}
+bool AArch64InstructionSelector::selectTLSGlobalValue(
+ MachineInstr &I, MachineRegisterInfo &MRI) const {
+ if (!STI.isTargetMachO())
+ return false;
+ MachineFunction &MF = *I.getParent()->getParent();
+ MF.getFrameInfo().setAdjustsStack(true);
+
+ const GlobalValue &GV = *I.getOperand(1).getGlobal();
+ MachineIRBuilder MIB(I);
+
+ MIB.buildInstr(AArch64::LOADgot, {AArch64::X0}, {})
+ .addGlobalAddress(&GV, 0, AArch64II::MO_TLS);
+
+ Register DestReg = MRI.createVirtualRegister(&AArch64::GPR64commonRegClass);
+ MIB.buildInstr(AArch64::LDRXui, {DestReg}, {Register(AArch64::X0)}).addImm(0);
+
+ // TLS calls preserve all registers except those that absolutely must be
+ // trashed: X0 (it takes an argument), LR (it's a call) and NZCV (let's not be
+ // silly).
+ MIB.buildInstr(AArch64::BLR, {}, {DestReg})
+ .addDef(AArch64::X0, RegState::Implicit)
+ .addRegMask(TRI.getTLSCallPreservedMask());
+
+ MIB.buildCopy(I.getOperand(0).getReg(), Register(AArch64::X0));
+ RBI.constrainGenericRegister(I.getOperand(0).getReg(), AArch64::GPR64RegClass,
+ MRI);
+ I.eraseFromParent();
+ return true;
+}
+
bool AArch64InstructionSelector::selectIntrinsicTrunc(
MachineInstr &I, MachineRegisterInfo &MRI) const {
const LLT SrcTy = MRI.getType(I.getOperand(0).getReg());