================
@@ -1026,6 +1036,70 @@ void SystemZAsmPrinter::LowerPATCHABLE_RET(const
MachineInstr &MI,
recordSled(BeginOfSled, MI, SledKind::FUNCTION_EXIT, 2);
}
+void SystemZAsmPrinter::lowerLOAD_TLS_BLOCK_ADDR(const MachineInstr &MI,
+ SystemZMCInstLower &Lower) {
+ Register AddrReg = MI.getOperand(0).getReg();
+ const MachineRegisterInfo &MRI = MI.getParent()->getParent()->getRegInfo();
+
+ // EAR can only load the low subregister so use a shift for %a0 to produce
+ // the GR containing %a0 and %a1.
+ const Register Reg32 =
+ MRI.getTargetRegisterInfo()->getSubReg(AddrReg, SystemZ::subreg_l32);
+
+ // ear <reg>, %a0
+ EmitToStreamer(*OutStreamer,
+
MCInstBuilder(SystemZ::EAR).addReg(Reg32).addReg(SystemZ::A0));
+
+ // sllg <reg>, <reg>, 32
+ EmitToStreamer(*OutStreamer, MCInstBuilder(SystemZ::SLLG)
+ .addReg(AddrReg)
+ .addReg(AddrReg)
+ .addReg(0)
+ .addImm(32));
+
+ // ear <reg>, %a1
+ EmitToStreamer(*OutStreamer,
+
MCInstBuilder(SystemZ::EAR).addReg(Reg32).addReg(SystemZ::A1));
+ return;
+}
+
+void SystemZAsmPrinter::lowerLOAD_GLOBAL_STACKGUARD_ADDR(
+ const MachineInstr &MI, SystemZMCInstLower &Lower) {
+ Register AddrReg = MI.getOperand(0).getReg();
+ const MachineFunction &MF = *(MI.getParent()->getParent());
+ const Module *M = MF.getFunction().getParent();
+ const TargetLowering *TLI = MF.getSubtarget().getTargetLowering();
+
+ // Obtain the global value (assert if stack guard variable can't be found).
+ const GlobalVariable *GV = cast<GlobalVariable>(
+ TLI->getSDagStackGuard(*M, TLI->getLibcallLoweringInfo()));
+
+ // If configured, emit the `__stack_protector_loc` entry
+ if (M->hasStackProtectorGuardRecord()) {
+ MCSymbol *Sym = OutContext.createTempSymbol();
+ OutStreamer->pushSection();
+ OutStreamer->switchSection(OutContext.getELFSection(
+ "__stack_protector_loc", ELF::SHT_PROGBITS, ELF::SHF_ALLOC));
+ OutStreamer->emitSymbolValue(Sym, getDataLayout().getPointerSize());
+ OutStreamer->popSection();
+ OutStreamer->emitLabel(Sym);
+ }
+ // Emit the address load.
+ if (M->getPICLevel() == PICLevel::NotPIC) {
+ EmitToStreamer(*OutStreamer, MCInstBuilder(SystemZ::LARL)
+ .addReg(AddrReg)
+ .addExpr(MCSymbolRefExpr::create(
+ getSymbol(GV), OutContext)));
+ } else {
+ EmitToStreamer(*OutStreamer,
+ MCInstBuilder(SystemZ::LGRL)
+ .addReg(AddrReg)
+ .addExpr(MCSymbolRefExpr::create(
+ getSymbol(GV), SystemZ::S_GOTENT, OutContext)));
+ }
+ return;
----------------
uweigand wrote:
Or here.
https://github.com/llvm/llvm-project/pull/169317
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