MI.getOperand(FIOperandNum + 1).ChangeToImmediate(Offset / OffsetScale);
}
-void
-AArch64RegisterInfo::eliminateCallFramePseudoInstr(MachineFunction &MF,
- MachineBasicBlock &MBB,
- MachineBasicBlock::iterator MI) const {
- const TargetFrameLowering *TFI = MF.getTarget().getFrameLowering();
- DebugLoc dl = MI->getDebugLoc();
- int Opcode = MI->getOpcode();
- bool IsDestroy = Opcode == TII.getCallFrameDestroyOpcode();
- uint64_t CalleePopAmount = IsDestroy ? MI->getOperand(1).getImm() : 0;
-
- if (!TFI->hasReservedCallFrame(MF)) {
- unsigned Align = TFI->getStackAlignment();
-
- int64_t Amount = MI->getOperand(0).getImm();
- Amount = RoundUpToAlignment(Amount, Align);
- if (!IsDestroy) Amount = -Amount;
-
- // N.b. if CalleePopAmount is valid but zero (i.e. callee would pop, but it
- // doesn't have to pop anything), then the first operand will be zero too so
- // this adjustment is a no-op.
- if (CalleePopAmount == 0) {
- // FIXME: in-function stack adjustment for calls is limited to 12-bits
- // because there's no guaranteed temporary register available. Mostly call
- // frames will be allocated at the start of a function so this is OK, but
- // it is a limitation that needs dealing with.
- assert(Amount > -0xfff && Amount < 0xfff && "call frame too large");
- emitSPUpdate(MBB, MI, dl, TII, AArch64::NoRegister, Amount);
- }
- } else if (CalleePopAmount != 0) {
- // If the calling convention demands that the callee pops arguments from the
- // stack, we want to add it back if we have a reserved call frame.
- assert(CalleePopAmount < 0xfff && "call frame too large");
- emitSPUpdate(MBB, MI, dl, TII, AArch64::NoRegister, -CalleePopAmount);
- }
-
- MBB.erase(MI);
-}
-
unsigned
AArch64RegisterInfo::getFrameRegister(const MachineFunction &MF) const {
const TargetFrameLowering *TFI = MF.getTarget().getFrameLowering();