================
@@ -996,6 +1023,63 @@ void SystemZAsmPrinter::LowerPATCHABLE_RET(const
MachineInstr &MI,
recordSled(BeginOfSled, MI, SledKind::FUNCTION_EXIT, 2);
}
+void SystemZAsmPrinter::lowerLOAD_SGA(const MachineInstr &MI,
+ SystemZMCInstLower &Lower) {
+ Register AddrReg = MI.getOperand(0).getReg();
+ const MachineBasicBlock &MBB = *(MI.getParent());
+ const MachineFunction &MF = *(MBB.getParent());
+ const MachineRegisterInfo &MRI = MF.getRegInfo();
+ const Module *M = MF.getFunction().getParent();
+
+ if (MI.getOpcode() == SystemZ::LOAD_TSGA) {
+ // 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;
+ }
+ if (MI.getOpcode() == SystemZ::LOAD_GSGA) {
----------------
uweigand wrote:
As these two cases share no code at all, here two separate functions would be
preferable. However, we could inline the emitStackProtectorLocEntry code.
https://github.com/llvm/llvm-project/pull/169317
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