const TargetRegisterClass *
getCrossCopyRegClass(const TargetRegisterClass *RC) const override;
+ /// getGPRsForTailCall - Returns a register class with registers that can be
+ /// used in forming tail calls.
+ const TargetRegisterClass *
+ getGPRsForTailCall(const MachineFunction &MF) const;
+
unsigned getRegPressureLimit(const TargetRegisterClass *RC,
MachineFunction &MF) const override;
getCalleeSavedRegs(const MachineFunction* MF) const override;
const uint32_t *getCallPreservedMask(const MachineFunction &MF,
CallingConv::ID) const override;
- const uint32_t *getNoPreservedMask() const;
+ const uint32_t *getNoPreservedMask() const override;
+
+ // Calls involved in thread-local variable lookup save more registers than
+ // normal calls, so they need a different mask to represent this.
+ const uint32_t *getDarwinTLSCallPreservedMask() const;
/// getReservedRegs - Returns a bitset indexed by physical register number
/// indicating if a register is a special register that has particular uses and
bool hasBasePointer(const MachineFunction &MF) const;
- bool canRealignStack(const MachineFunction &MF) const;
-
- bool needsStackRealignment(const MachineFunction &MF) const override;
+ bool canRealignStack(const MachineFunction &MF) const override;
bool hasReservedSpillSlot(const MachineFunction &MF, unsigned Reg,
int &FrameIdx) const override;
unsigned getSlotSize() const { return SlotSize; }
};
-// getX86SubSuperRegister - X86 utility function. It returns the sub or super
-// register of a specific X86 register.
-// e.g. getX86SubSuperRegister(X86::EAX, MVT::i16) return X86:AX
+/// Returns the sub or super register of a specific X86 register.
+/// e.g. getX86SubSuperRegister(X86::EAX, MVT::i16) returns X86::AX.
+/// Aborts on error.
unsigned getX86SubSuperRegister(unsigned, MVT::SimpleValueType, bool High=false);
+/// Returns the sub or super register of a specific X86 register.
+/// Like getX86SubSuperRegister() but returns 0 on error.
+unsigned getX86SubSuperRegisterOrZero(unsigned, MVT::SimpleValueType,
+ bool High = false);
+
//get512BitRegister - X86 utility - returns 512-bit super register
unsigned get512BitSuperRegister(unsigned Reg);