}
// hasFP - Return true if the specified function should have a dedicated frame
-// pointer register. This is true if the function has variable sized allocas or
-// if frame pointer elimination is disabled.
+// pointer register. This is true if the function has variable sized allocas,
+// if it needs dynamic stack realignment, if frame pointer elimination is
+// disabled, or if the frame address is taken.
bool MipsFrameLowering::hasFP(const MachineFunction &MF) const {
const MachineFrameInfo *MFI = MF.getFrameInfo();
+ const TargetRegisterInfo *TRI = STI.getRegisterInfo();
+
return MF.getTarget().Options.DisableFramePointerElim(MF) ||
- MFI->hasVarSizedObjects() || MFI->isFrameAddressTaken();
+ MFI->hasVarSizedObjects() || MFI->isFrameAddressTaken() ||
+ TRI->needsStackRealignment(MF);
+}
+
+bool MipsFrameLowering::hasBP(const MachineFunction &MF) const {
+ const MachineFrameInfo *MFI = MF.getFrameInfo();
+ const TargetRegisterInfo *TRI = STI.getRegisterInfo();
+
+ return MFI->hasVarSizedObjects() && TRI->needsStackRealignment(MF);
}
uint64_t MipsFrameLowering::estimateStackSize(const MachineFunction &MF) const {
const MachineFrameInfo *MFI = MF.getFrameInfo();
- const TargetRegisterInfo &TRI = *MF.getTarget().getRegisterInfo();
+ const TargetRegisterInfo &TRI = *STI.getRegisterInfo();
int64_t Offset = 0;
return RoundUpToAlignment(Offset, getStackAlignment());
}
+
+// Eliminate ADJCALLSTACKDOWN, ADJCALLSTACKUP pseudo instructions
+void MipsFrameLowering::
+eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB,
+ MachineBasicBlock::iterator I) const {
+ unsigned SP = STI.getABI().IsN64() ? Mips::SP_64 : Mips::SP;
+
+ if (!hasReservedCallFrame(MF)) {
+ int64_t Amount = I->getOperand(0).getImm();
+ if (I->getOpcode() == Mips::ADJCALLSTACKDOWN)
+ Amount = -Amount;
+
+ STI.getInstrInfo()->adjustStackPtr(SP, Amount, MBB, I);
+ }
+
+ MBB.erase(I);
+}