-static void LowerSTATEPOINT(MCStreamer &OS, StackMaps &SM,
- const MachineInstr &MI, bool Is64Bit,
- const TargetMachine& TM,
- const MCSubtargetInfo& STI,
- X86MCInstLower &MCInstLowering) {
- assert(Is64Bit && "Statepoint currently only supports X86-64");
-
- // Lower call target and choose correct opcode
- const MachineOperand &call_target = StatepointOpers(&MI).getCallTarget();
- MCOperand call_target_mcop;
- unsigned call_opcode;
- switch (call_target.getType()) {
- case MachineOperand::MO_GlobalAddress:
- case MachineOperand::MO_ExternalSymbol:
- call_target_mcop = MCInstLowering.LowerSymbolOperand(
- call_target,
- MCInstLowering.GetSymbolFromOperand(call_target));
- call_opcode = X86::CALL64pcrel32;
- // Currently, we only support relative addressing with statepoints.
- // Otherwise, we'll need a scratch register to hold the target
- // address. You'll fail asserts during load & relocation if this
- // symbol is to far away. (TODO: support non-relative addressing)
- break;
- case MachineOperand::MO_Immediate:
- call_target_mcop = MCOperand::CreateImm(call_target.getImm());
- call_opcode = X86::CALL64pcrel32;
- // Currently, we only support relative addressing with statepoints.
- // Otherwise, we'll need a scratch register to hold the target
- // immediate. You'll fail asserts during load & relocation if this
- // address is to far away. (TODO: support non-relative addressing)
- break;
- case MachineOperand::MO_Register:
- call_target_mcop = MCOperand::CreateReg(call_target.getReg());
- call_opcode = X86::CALL64r;
- break;
- default:
- llvm_unreachable("Unsupported operand type in statepoint call target");
- break;
- }