namespace llvm {
class CalleeSavedInfo;
class MachineFunction;
- class MachineBasicBlock;
- class MachineMove;
class RegScavenger;
/// Information about stack frame layout on the target. It holds the direction
virtual void emitEpilogue(MachineFunction &MF,
MachineBasicBlock &MBB) const = 0;
+ /// Adjust the prologue to have the function use segmented stacks. This works
+ /// by adding a check even before the "normal" function prologue.
+ virtual void adjustForSegmentedStacks(MachineFunction &MF) const { }
+
/// spillCalleeSavedRegisters - Issues instruction(s) to spill all callee
/// saved registers and returns true if it isn't possible / profitable to do
/// so by issuing a series of store instructions via
return hasReservedCallFrame(MF) || hasFP(MF);
}
- /// getInitialFrameState - Returns a list of machine moves that are assumed
- /// on entry to all functions. Note that LabelID is ignored (assumed to be
- /// the beginning of the function.)
- virtual void getInitialFrameState(std::vector<MachineMove> &Moves) const;
-
/// getFrameIndexOffset - Returns the displacement from the frame register to
/// the stack frame of the specified index.
virtual int getFrameIndexOffset(const MachineFunction &MF, int FI) const;