}
//===--------------------------------------------------------------------===//
- // All basic block modifier functions below return the number of
- // instructions added to (negative if removed from) the basic block
- // passed as their first argument.
- //
- // FIXME: This is only needed because we use a std::vector instead
- // of an ilist to keep MachineBasicBlock instructions. Inserting an
- // instruction to a MachineBasicBlock invalidates all iterators to
- // the basic block. The return value can be used to update an index
- // to the machine basic block instruction vector and circumvent the
- // iterator elimination problem but this is really not needed if we
- // move to a better representation.
- //
-
- //===--------------------------------------------------------------------===//
// Interfaces used by the register allocator and stack frame
// manipulation passes to move data around between registers,
// immediates and memory. The return value is the number of
// instructions added to (negative if removed from) the basic block.
//
- virtual int storeRegToStackSlot(MachineBasicBlock &MBB,
- MachineBasicBlock::iterator MI,
- unsigned SrcReg, int FrameIndex) const = 0;
-
- virtual int loadRegFromStackSlot(MachineBasicBlock &MBB,
+ virtual void storeRegToStackSlot(MachineBasicBlock &MBB,
MachineBasicBlock::iterator MI,
- unsigned DestReg, int FrameIndex) const = 0;
+ unsigned SrcReg, int FrameIndex) const = 0;
+
+ virtual void loadRegFromStackSlot(MachineBasicBlock &MBB,
+ MachineBasicBlock::iterator MI,
+ unsigned DestReg, int FrameIndex) const = 0;
- virtual int copyRegToReg(MachineBasicBlock &MBB,
- MachineBasicBlock::iterator MI,
- unsigned DestReg, unsigned SrcReg,
- const TargetRegisterClass *RC) const = 0;
+ virtual void copyRegToReg(MachineBasicBlock &MBB,
+ MachineBasicBlock::iterator MI,
+ unsigned DestReg, unsigned SrcReg,
+ const TargetRegisterClass *RC) const = 0;
/// foldMemoryOperand - Attempt to fold a load or store of the
virtual MachineInstr* foldMemoryOperand(MachineInstr* MI,
unsigned OpNum,
int FrameIndex) const {
- return NULL;
+ return 0;
}
/// getCallFrameSetup/DestroyOpcode - These methods return the opcode of the