void AsmPrinter::emitCFIInstruction(const MCCFIInstruction &Inst) const {
switch (Inst.getOperation()) {
default:
llvm_unreachable("Unexpected instruction");
case MCCFIInstruction::OpDefCfaOffset:
OutStreamer->EmitCFIDefCfaOffset(Inst.getOffset());
break;
case MCCFIInstruction::OpAdjustCfaOffset:
OutStreamer->EmitCFIAdjustCfaOffset(Inst.getOffset());
break;
case MCCFIInstruction::OpDefCfa:
OutStreamer->EmitCFIDefCfa(Inst.getRegister(), Inst.getOffset());
break;
case MCCFIInstruction::OpDefCfaRegister:
OutStreamer->EmitCFIDefCfaRegister(Inst.getRegister());
break;
case MCCFIInstruction::OpOffset:
OutStreamer->EmitCFIOffset(Inst.getRegister(), Inst.getOffset());
break;
case MCCFIInstruction::OpRegister:
OutStreamer->EmitCFIRegister(Inst.getRegister(), Inst.getRegister2());
break;
case MCCFIInstruction::OpWindowSave:
OutStreamer->EmitCFIWindowSave();
break;
case MCCFIInstruction::OpSameValue:
OutStreamer->EmitCFISameValue(Inst.getRegister());
break;
case MCCFIInstruction::OpGnuArgsSize:
OutStreamer->EmitCFIGnuArgsSize(Inst.getOffset());
break;
case MCCFIInstruction::OpEscape:
OutStreamer->EmitCFIEscape(Inst.getValues());
break;
}
}
static void printCFI(raw_ostream &OS, const MCCFIInstruction &CFI,
const TargetRegisterInfo *TRI) {
switch (CFI.getOperation()) {
case MCCFIInstruction::OpSameValue:
OS << "same_value ";
if (MCSymbol *Label = CFI.getLabel())
MachineOperand::printSymbol(OS, *Label);
printCFIRegister(CFI.getRegister(), OS, TRI);
break;
case MCCFIInstruction::OpRememberState:
OS << "remember_state ";
if (MCSymbol *Label = CFI.getLabel())
MachineOperand::printSymbol(OS, *Label);
break;
case MCCFIInstruction::OpRestoreState:
OS << "restore_state ";
if (MCSymbol *Label = CFI.getLabel())
MachineOperand::printSymbol(OS, *Label);
break;
case MCCFIInstruction::OpOffset:
OS << "offset ";
if (MCSymbol *Label = CFI.getLabel())
MachineOperand::printSymbol(OS, *Label);
printCFIRegister(CFI.getRegister(), OS, TRI);
OS << ", " << CFI.getOffset();
break;
case MCCFIInstruction::OpDefCfaRegister:
OS << "def_cfa_register ";
if (MCSymbol *Label = CFI.getLabel())
MachineOperand::printSymbol(OS, *Label);
printCFIRegister(CFI.getRegister(), OS, TRI);
break;
case MCCFIInstruction::OpDefCfaOffset:
OS << "def_cfa_offset ";
if (MCSymbol *Label = CFI.getLabel())
MachineOperand::printSymbol(OS, *Label);
OS << CFI.getOffset();
break;
case MCCFIInstruction::OpDefCfa:
OS << "def_cfa ";
if (MCSymbol *Label = CFI.getLabel())
MachineOperand::printSymbol(OS, *Label);
printCFIRegister(CFI.getRegister(), OS, TRI);
OS << ", " << CFI.getOffset();
break;
case MCCFIInstruction::OpRelOffset:
OS << "rel_offset ";
if (MCSymbol *Label = CFI.getLabel())
MachineOperand::printSymbol(OS, *Label);
printCFIRegister(CFI.getRegister(), OS, TRI);
OS << ", " << CFI.getOffset();
break;
case MCCFIInstruction::OpAdjustCfaOffset:
OS << "adjust_cfa_offset ";
if (MCSymbol *Label = CFI.getLabel())
MachineOperand::printSymbol(OS, *Label);
OS << CFI.getOffset();
break;
case MCCFIInstruction::OpRestore:
OS << "restore ";
if (MCSymbol *Label = CFI.getLabel())
MachineOperand::printSymbol(OS, *Label);
printCFIRegister(CFI.getRegister(), OS, TRI);
break;
case MCCFIInstruction::OpEscape: {
OS << "escape ";
if (MCSymbol *Label = CFI.getLabel())
MachineOperand::printSymbol(OS, *Label);
if (!CFI.getValues().empty()) {
size_t e = CFI.getValues().size() - 1;
for (size_t i = 0; i < e; ++i)
OS << format("0x%02x", uint8_t(CFI.getValues()[i])) << ", ";
OS << format("0x%02x", uint8_t(CFI.getValues()[e])) << ", ";
}
break;
}
case MCCFIInstruction::OpUndefined:
OS << "undefined ";
if (MCSymbol *Label = CFI.getLabel())
MachineOperand::printSymbol(OS, *Label);
printCFIRegister(CFI.getRegister(), OS, TRI);
break;
case MCCFIInstruction::OpRegister:
OS << "register ";
if (MCSymbol *Label = CFI.getLabel())
MachineOperand::printSymbol(OS, *Label);
printCFIRegister(CFI.getRegister(), OS, TRI);
OS << ", ";
printCFIRegister(CFI.getRegister2(), OS, TRI);
break;
case MCCFIInstruction::OpWindowSave:
OS << "window_save ";
if (MCSymbol *Label = CFI.getLabel())
MachineOperand::printSymbol(OS, *Label);
break;
case MCCFIInstruction::OpNegateRAState:
OS << "negate_ra_sign_state ";
if (MCSymbol *Label = CFI.getLabel())
MachineOperand::printSymbol(OS, *Label);
break;
default:
// TODO: Print the other CFI Operations.
OS << "<unserializable cfi directive>";
break;
}
}
void EmitCFIInstruction(MCStreamer &Streamer,
const MCCFIInstruction &Instr,
int &CFAOffset, int DataAlignmentFactor) {
// Same as MCDwarf::EmitCFIInstruction ()
// FIXME: Unify
int dataAlignmentFactor = DataAlignmentFactor;
bool VerboseAsm = Streamer.isVerboseAsm();
switch (Instr.getOperation()) {
case MCCFIInstruction::OpWindowSave: {
Streamer.EmitIntValue(dwarf::DW_CFA_GNU_window_save, 1);
return;
}
case MCCFIInstruction::OpUndefined: {
unsigned Reg = Instr.getRegister();
if (VerboseAsm) {
Streamer.AddComment("DW_CFA_undefined");
Streamer.AddComment(Twine("Reg ") + Twine(Reg));
}
Streamer.EmitIntValue(dwarf::DW_CFA_undefined, 1);
Streamer.EmitULEB128IntValue(Reg);
return;
}
case MCCFIInstruction::OpAdjustCfaOffset:
case MCCFIInstruction::OpDefCfaOffset: {
const bool IsRelative =
Instr.getOperation() == MCCFIInstruction::OpAdjustCfaOffset;
if (VerboseAsm)
Streamer.AddComment("DW_CFA_def_cfa_offset");
Streamer.EmitIntValue(dwarf::DW_CFA_def_cfa_offset, 1);
if (IsRelative)
CFAOffset += Instr.getOffset();
else
// The backends pass in a negative value,
// then createDefCfaOffset () negates it
CFAOffset = Instr.getOffset();
if (VerboseAsm)
Streamer.AddComment(Twine("Offset " + Twine(CFAOffset)));
Streamer.EmitULEB128IntValue(CFAOffset);
return;
}
case MCCFIInstruction::OpDefCfa: {
if (VerboseAsm)
Streamer.AddComment("DW_CFA_def_cfa");
Streamer.EmitIntValue(dwarf::DW_CFA_def_cfa, 1);
if (VerboseAsm)
Streamer.AddComment(Twine("Reg ") + Twine(Instr.getRegister()));
Streamer.EmitULEB128IntValue(Instr.getRegister());
// Backends pass a negative value to createDefCfa () which
// negates it back
CFAOffset = Instr.getOffset();
if (VerboseAsm)
Streamer.AddComment(Twine("Offset " + Twine(CFAOffset)));
Streamer.EmitULEB128IntValue(CFAOffset);
return;
}
case MCCFIInstruction::OpDefCfaRegister: {
if (VerboseAsm)
Streamer.AddComment("DW_CFA_def_cfa_register");
Streamer.EmitIntValue(dwarf::DW_CFA_def_cfa_register, 1);
if (VerboseAsm)
Streamer.AddComment(Twine("Reg ") + Twine(Instr.getRegister()));
Streamer.EmitULEB128IntValue(Instr.getRegister());
return;
}
case MCCFIInstruction::OpOffset:
case MCCFIInstruction::OpRelOffset: {
const bool IsRelative =
Instr.getOperation() == MCCFIInstruction::OpRelOffset;
unsigned Reg = Instr.getRegister();
int Offset = Instr.getOffset();
if (IsRelative)
Offset -= CFAOffset;
Offset = Offset / dataAlignmentFactor;
if (Offset < 0) {
if (VerboseAsm) Streamer.AddComment("DW_CFA_offset_extended_sf");
Streamer.EmitIntValue(dwarf::DW_CFA_offset_extended_sf, 1);
if (VerboseAsm) Streamer.AddComment(Twine("Reg ") + Twine(Reg));
Streamer.EmitULEB128IntValue(Reg);
if (VerboseAsm) Streamer.AddComment(Twine("Offset ") + Twine(Offset));
Streamer.EmitSLEB128IntValue(Offset);
} else if (Reg < 64) {
if (VerboseAsm) Streamer.AddComment(Twine("DW_CFA_offset + Reg(") +
Twine(Reg) + ")");
Streamer.EmitIntValue(dwarf::DW_CFA_offset + Reg, 1);
if (VerboseAsm) Streamer.AddComment(Twine("Offset ") + Twine(Offset));
Streamer.EmitULEB128IntValue(Offset);
} else {
if (VerboseAsm) Streamer.AddComment("DW_CFA_offset_extended");
Streamer.EmitIntValue(dwarf::DW_CFA_offset_extended, 1);
if (VerboseAsm) Streamer.AddComment(Twine("Reg ") + Twine(Reg));
Streamer.EmitULEB128IntValue(Reg);
if (VerboseAsm) Streamer.AddComment(Twine("Offset ") + Twine(Offset));
Streamer.EmitULEB128IntValue(Offset);
}
return;
}
case MCCFIInstruction::OpRememberState:
if (VerboseAsm) Streamer.AddComment("DW_CFA_remember_state");
Streamer.EmitIntValue(dwarf::DW_CFA_remember_state, 1);
return;
case MCCFIInstruction::OpRestoreState:
if (VerboseAsm) Streamer.AddComment("DW_CFA_restore_state");
Streamer.EmitIntValue(dwarf::DW_CFA_restore_state, 1);
return;
case MCCFIInstruction::OpSameValue: {
unsigned Reg = Instr.getRegister();
if (VerboseAsm) Streamer.AddComment("DW_CFA_same_value");
Streamer.EmitIntValue(dwarf::DW_CFA_same_value, 1);
if (VerboseAsm) Streamer.AddComment(Twine("Reg ") + Twine(Reg));
Streamer.EmitULEB128IntValue(Reg);
return;
}
case MCCFIInstruction::OpRestore: {
unsigned Reg = Instr.getRegister();
if (VerboseAsm) {
Streamer.AddComment("DW_CFA_restore");
Streamer.AddComment(Twine("Reg ") + Twine(Reg));
}
Streamer.EmitIntValue(dwarf::DW_CFA_restore | Reg, 1);
return;
}
case MCCFIInstruction::OpEscape:
if (VerboseAsm) Streamer.AddComment("Escape bytes");
Streamer.EmitBytes(Instr.getValues());
return;
case MCCFIInstruction::OpRegister:
llvm_unreachable("Unhandled case in switch");
return;
}
llvm_unreachable("Unhandled case in switch");
}