+ /// EmitCompactUnwind - Emit the unwind information in a compact way. If
+ /// we're successful, return 'true'. Otherwise, return 'false' and it will
+ /// emit the normal CIE and FDE.
+ bool EmitCompactUnwind(MCStreamer &streamer,
+ const MCDwarfFrameInfo &frame);
+
+ const MCSymbol &EmitCIE(MCStreamer &streamer,
+ const MCSymbol *personality,
+ unsigned personalityEncoding,
+ const MCSymbol *lsda,
+ unsigned lsdaEncoding);
+ MCSymbol *EmitFDE(MCStreamer &streamer,
+ const MCSymbol &cieStart,
+ const MCDwarfFrameInfo &frame);
+ void EmitCFIInstructions(MCStreamer &streamer,
+ const std::vector<MCCFIInstruction> &Instrs,
+ MCSymbol *BaseLabel);
+ void EmitCFIInstruction(MCStreamer &Streamer,
+ const MCCFIInstruction &Instr);
+ };
+
+} // end anonymous namespace
+
+static void EmitEncodingByte(MCStreamer &Streamer, unsigned Encoding,
+ StringRef Prefix) {
+ if (Streamer.isVerboseAsm()) {
+ const char *EncStr = 0;
+ switch (Encoding) {
+ default: EncStr = "<unknown encoding>";
+ case dwarf::DW_EH_PE_absptr: EncStr = "absptr";
+ case dwarf::DW_EH_PE_omit: EncStr = "omit";
+ case dwarf::DW_EH_PE_pcrel: EncStr = "pcrel";
+ case dwarf::DW_EH_PE_udata4: EncStr = "udata4";
+ case dwarf::DW_EH_PE_udata8: EncStr = "udata8";
+ case dwarf::DW_EH_PE_sdata4: EncStr = "sdata4";
+ case dwarf::DW_EH_PE_sdata8: EncStr = "sdata8";
+ case dwarf::DW_EH_PE_pcrel |dwarf::DW_EH_PE_udata4: EncStr = "pcrel udata4";
+ case dwarf::DW_EH_PE_pcrel |dwarf::DW_EH_PE_sdata4: EncStr = "pcrel sdata4";
+ case dwarf::DW_EH_PE_pcrel |dwarf::DW_EH_PE_udata8: EncStr = "pcrel udata8";
+ case dwarf::DW_EH_PE_pcrel |dwarf::DW_EH_PE_sdata8: EncStr = "pcrel sdata8";
+ case dwarf::DW_EH_PE_indirect |dwarf::DW_EH_PE_pcrel|dwarf::DW_EH_PE_udata4:
+ EncStr = "indirect pcrel udata4";
+ case dwarf::DW_EH_PE_indirect |dwarf::DW_EH_PE_pcrel|dwarf::DW_EH_PE_sdata4:
+ EncStr = "indirect pcrel sdata4";
+ case dwarf::DW_EH_PE_indirect |dwarf::DW_EH_PE_pcrel|dwarf::DW_EH_PE_udata8:
+ EncStr = "indirect pcrel udata8";
+ case dwarf::DW_EH_PE_indirect |dwarf::DW_EH_PE_pcrel|dwarf::DW_EH_PE_sdata8:
+ EncStr = "indirect pcrel sdata8";
+ }
+
+ Streamer.AddComment(Twine(Prefix) + " = " + EncStr);
+ }
+
+ Streamer.EmitIntValue(Encoding, 1);
+}
+
+void FrameEmitterImpl::EmitCFIInstruction(MCStreamer &Streamer,
+ const MCCFIInstruction &Instr) {
+ int dataAlignmentFactor = getDataAlignmentFactor(Streamer);
+ bool VerboseAsm = Streamer.isVerboseAsm();
+
+ switch (Instr.getOperation()) {
+ case MCCFIInstruction::Move:
+ case MCCFIInstruction::RelMove: {
+ const MachineLocation &Dst = Instr.getDestination();
+ const MachineLocation &Src = Instr.getSource();
+ const bool IsRelative = Instr.getOperation() == MCCFIInstruction::RelMove;
+