/// Registers that this does not apply to simply should set this to null.
///
struct MRegisterDesc {
- const char *Name; // Assembly language name for the register
- const unsigned *AliasSet; // Register Alias Set, described above
- unsigned Flags; // Flags identifying register properties (below)
- unsigned TSFlags; // Target Specific Flags
+ const char *Name; // Assembly language name for the register
+ const unsigned *AliasSet; // Register Alias Set, described above
+ unsigned char SpillSize; // Size of this register in bytes
+ unsigned char SpillAlignment; // Alignment of stack slot for this reg
};
class TargetRegisterClass {
regclass_iterator RegClassBegin, RegClassEnd; // List of regclasses
- const TargetRegisterClass **PhysRegClasses; // Reg class for each register
int CallFrameSetupOpcode, CallFrameDestroyOpcode;
protected:
MRegisterInfo(const MRegisterDesc *D, unsigned NR,
return Reg >= FirstVirtualRegister;
}
+ /// getAllocatableSet - Returns a bitset indexed by register number
+ /// indicating if a register is allocatable or not.
+ std::vector<bool> getAllocatableSet(MachineFunction &MF) const;
+
const MRegisterDesc &operator[](unsigned RegNo) const {
assert(RegNo < NumRegs &&
"Attempting to access record for invalid register number!");
///
const MRegisterDesc &get(unsigned RegNo) const { return operator[](RegNo); }
- /// getRegClass - Return the register class for the specified physical
- /// register.
- ///
- const TargetRegisterClass *getRegClass(unsigned RegNo) const {
- assert(RegNo < NumRegs && "Register number out of range!");
- assert(PhysRegClasses[RegNo] && "Register is not in a class!");
- return PhysRegClasses[RegNo];
- }
-
/// getAliasSet - Return the set of registers aliased by the specified
/// register, or a null list of there are none. The list returned is zero
/// terminated.
return get(RegNo).Name;
}
+ /// getSpillSize - Return the size in bits required of a stack slot used to
+ /// spill register into.
+ unsigned getSpillSize(unsigned RegNo) const {
+ return get(RegNo).SpillSize;
+ }
+
+ /// getSpillAlignment - Return the alignment required by a stack slot used to
+ /// spill register into.
+ unsigned getSpillAlignment(unsigned RegNo) const {
+ return get(RegNo).SpillAlignment;
+ }
+
/// getNumRegs - Return the number of registers this target has
/// (useful for sizing arrays holding per register information)
unsigned getNumRegs() const {