+// Lower a patchpoint of the form:
+// [<def>], <id>, <numBytes>, <target>, <numArgs>
+void PPCAsmPrinter::LowerPATCHPOINT(MCStreamer &OutStreamer, StackMaps &SM,
+ const MachineInstr &MI) {
+ SM.recordPatchPoint(MI);
+ PatchPointOpers Opers(&MI);
+
+ int64_t CallTarget = Opers.getMetaOper(PatchPointOpers::TargetPos).getImm();
+ unsigned EncodedBytes = 0;
+ if (CallTarget) {
+ assert((CallTarget & 0xFFFFFFFFFFFF) == CallTarget &&
+ "High 16 bits of call target should be zero.");
+ unsigned ScratchReg = MI.getOperand(Opers.getNextScratchIdx()).getReg();
+ EncodedBytes = 6*4;
+ // Materialize the jump address:
+ EmitToStreamer(OutStreamer, MCInstBuilder(PPC::LI8)
+ .addReg(ScratchReg)
+ .addImm((CallTarget >> 32) & 0xFFFF));
+ EmitToStreamer(OutStreamer, MCInstBuilder(PPC::RLDIC)
+ .addReg(ScratchReg)
+ .addReg(ScratchReg)
+ .addImm(32).addImm(16));
+ EmitToStreamer(OutStreamer, MCInstBuilder(PPC::ORIS8)
+ .addReg(ScratchReg)
+ .addReg(ScratchReg)
+ .addImm((CallTarget >> 16) & 0xFFFF));
+ EmitToStreamer(OutStreamer, MCInstBuilder(PPC::ORI8)
+ .addReg(ScratchReg)
+ .addReg(ScratchReg)
+ .addImm(CallTarget & 0xFFFF));
+
+ EmitToStreamer(OutStreamer, MCInstBuilder(PPC::MTCTR8).addReg(ScratchReg));
+ EmitToStreamer(OutStreamer, MCInstBuilder(PPC::BCTRL8));
+ }
+
+ // Emit padding.
+ unsigned NumBytes = Opers.getMetaOper(PatchPointOpers::NBytesPos).getImm();
+ assert(NumBytes >= EncodedBytes &&
+ "Patchpoint can't request size less than the length of a call.");
+ assert((NumBytes - EncodedBytes) % 4 == 0 &&
+ "Invalid number of NOP bytes requested!");
+ for (unsigned i = EncodedBytes; i < NumBytes; i += 4)
+ EmitToStreamer(OutStreamer, MCInstBuilder(PPC::NOP));
+}
+
+/// EmitTlsCall -- Given a GETtls[ld]ADDR[32] instruction, print a
+/// call to __tls_get_addr to the current output stream.
+void PPCAsmPrinter::EmitTlsCall(const MachineInstr *MI,
+ MCSymbolRefExpr::VariantKind VK) {
+ StringRef Name = "__tls_get_addr";
+ MCSymbol *TlsGetAddr = OutContext.getOrCreateSymbol(Name);
+ MCSymbolRefExpr::VariantKind Kind = MCSymbolRefExpr::VK_None;
+
+ assert(MI->getOperand(0).isReg() &&
+ ((Subtarget->isPPC64() && MI->getOperand(0).getReg() == PPC::X3) ||
+ (!Subtarget->isPPC64() && MI->getOperand(0).getReg() == PPC::R3)) &&
+ "GETtls[ld]ADDR[32] must define GPR3");
+ assert(MI->getOperand(1).isReg() &&
+ ((Subtarget->isPPC64() && MI->getOperand(1).getReg() == PPC::X3) ||
+ (!Subtarget->isPPC64() && MI->getOperand(1).getReg() == PPC::R3)) &&
+ "GETtls[ld]ADDR[32] must read GPR3");
+
+ if (!Subtarget->isPPC64() && !Subtarget->isDarwin() &&
+ TM.getRelocationModel() == Reloc::PIC_)
+ Kind = MCSymbolRefExpr::VK_PLT;
+ const MCSymbolRefExpr *TlsRef =
+ MCSymbolRefExpr::Create(TlsGetAddr, Kind, OutContext);
+ const MachineOperand &MO = MI->getOperand(2);
+ const GlobalValue *GValue = MO.getGlobal();
+ MCSymbol *MOSymbol = getSymbol(GValue);
+ const MCExpr *SymVar = MCSymbolRefExpr::Create(MOSymbol, VK, OutContext);
+ EmitToStreamer(*OutStreamer,
+ MCInstBuilder(Subtarget->isPPC64() ?
+ PPC::BL8_NOP_TLS : PPC::BL_TLS)
+ .addExpr(TlsRef)
+ .addExpr(SymVar));
+}