+ OutStreamer->EmitLabel(PICBase);
+ return;
+ }
+ case PPC::UpdateGBR: {
+ // Transform %Rd = UpdateGBR(%Rt, %Ri)
+ // Into: lwz %Rt, .L0$poff - .L0$pb(%Ri)
+ // add %Rd, %Rt, %Ri
+ // Get the offset from the GOT Base Register to the GOT
+ LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, isDarwin);
+ MCSymbol *PICOffset =
+ MF->getInfo<PPCFunctionInfo>()->getPICOffsetSymbol();
+ TmpInst.setOpcode(PPC::LWZ);
+ const MCExpr *Exp =
+ MCSymbolRefExpr::create(PICOffset, MCSymbolRefExpr::VK_None, OutContext);
+ const MCExpr *PB =
+ MCSymbolRefExpr::create(MF->getPICBaseSymbol(),
+ MCSymbolRefExpr::VK_None,
+ OutContext);
+ const MCOperand TR = TmpInst.getOperand(1);
+ const MCOperand PICR = TmpInst.getOperand(0);
+
+ // Step 1: lwz %Rt, .L$poff - .L$pb(%Ri)
+ TmpInst.getOperand(1) =
+ MCOperand::createExpr(MCBinaryExpr::createSub(Exp, PB, OutContext));
+ TmpInst.getOperand(0) = TR;
+ TmpInst.getOperand(2) = PICR;
+ EmitToStreamer(*OutStreamer, TmpInst);
+
+ TmpInst.setOpcode(PPC::ADD4);
+ TmpInst.getOperand(0) = PICR;
+ TmpInst.getOperand(1) = TR;
+ TmpInst.getOperand(2) = PICR;
+ EmitToStreamer(*OutStreamer, TmpInst);
+ return;
+ }
+ case PPC::LWZtoc: {
+ // Transform %R3 = LWZtoc <ga:@min1>, %R2
+ LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, isDarwin);
+
+ // Change the opcode to LWZ, and the global address operand to be a
+ // reference to the GOT entry we will synthesize later.
+ TmpInst.setOpcode(PPC::LWZ);
+ const MachineOperand &MO = MI->getOperand(1);
+
+ // Map symbol -> label of TOC entry
+ assert(MO.isGlobal() || MO.isCPI() || MO.isJTI() || MO.isBlockAddress());
+ MCSymbol *MOSymbol = nullptr;
+ if (MO.isGlobal())
+ MOSymbol = getSymbol(MO.getGlobal());
+ else if (MO.isCPI())
+ MOSymbol = GetCPISymbol(MO.getIndex());
+ else if (MO.isJTI())
+ MOSymbol = GetJTISymbol(MO.getIndex());
+ else if (MO.isBlockAddress())
+ MOSymbol = GetBlockAddressSymbol(MO.getBlockAddress());
+
+ if (PL == PICLevel::Small) {
+ const MCExpr *Exp =
+ MCSymbolRefExpr::create(MOSymbol, MCSymbolRefExpr::VK_GOT,
+ OutContext);
+ TmpInst.getOperand(1) = MCOperand::createExpr(Exp);
+ } else {
+ MCSymbol *TOCEntry = lookUpOrCreateTOCEntry(MOSymbol);
+
+ const MCExpr *Exp =
+ MCSymbolRefExpr::create(TOCEntry, MCSymbolRefExpr::VK_None,
+ OutContext);
+ const MCExpr *PB =
+ MCSymbolRefExpr::create(OutContext.getOrCreateSymbol(Twine(".LTOC")),
+ OutContext);
+ Exp = MCBinaryExpr::createSub(Exp, PB, OutContext);
+ TmpInst.getOperand(1) = MCOperand::createExpr(Exp);
+ }
+ EmitToStreamer(*OutStreamer, TmpInst);