//! Return the array of callee-saved registers
virtual const unsigned* getCalleeSavedRegs(const MachineFunction *MF) const;
- //! Return the register class array of the callee-saved registers
- virtual const TargetRegisterClass* const *
- getCalleeSavedRegClasses(const MachineFunction *MF) const;
+ //! Allow for scavenging, so we can get scratch registers when needed.
+ virtual bool requiresRegisterScavenging(const MachineFunction &MF) const
+ { return true; }
//! Return the reserved registers
BitVector getReservedRegs(const MachineFunction &MF) const;
// New methods added:
//------------------------------------------------------------------------
- //! Return the array of argument passing registers
+ //! Get DWARF debugging register number
+ int getDwarfRegNum(unsigned RegNum, bool isEH) const;
+
+ //! Convert D-form load/store to X-form load/store
/*!
- \note The size of this array is returned by getArgRegsSize().
+ Converts a regiser displacement load/store into a register-indexed
+ load/store for large stack frames, when the stack frame exceeds the
+ range of a s10 displacement.
*/
- static const unsigned *getArgRegs();
-
- //! Return the size of the argument passing register array
- static unsigned getNumArgRegs();
+ int convertDFormToXForm(int dFormOpcode) const;
- //! Get DWARF debugging register number
- int getDwarfRegNum(unsigned RegNum, bool isEH) const;
+ //! Acquire an unused register in an emergency.
+ unsigned findScratchRegister(MachineBasicBlock::iterator II,
+ RegScavenger *RS,
+ const TargetRegisterClass *RC,
+ int SPAdj) const;
+
};
} // end namespace llvm