-//===- X86RegisterInfo.h - X86 Register Information Impl --------*- C++ -*-===//
+//===-- X86RegisterInfo.h - X86 Register Information Impl -------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
#define X86REGISTERINFO_H
#include "llvm/Target/TargetRegisterInfo.h"
-#include "X86GenRegisterInfo.h.inc"
+
+#define GET_REGINFO_HEADER
+#include "X86GenRegisterInfo.inc"
namespace llvm {
class Type;
class TargetInstrInfo;
class X86TargetMachine;
-/// N86 namespace - Native X86 register numbers
-///
-namespace N86 {
- enum {
- EAX = 0, ECX = 1, EDX = 2, EBX = 3, ESP = 4, EBP = 5, ESI = 6, EDI = 7
- };
-}
-
-namespace X86 {
- /// SubregIndex - The index of various sized subregister classes. Note that
- /// these indices must be kept in sync with the class indices in the
- /// X86RegisterInfo.td file.
- enum SubregIndex {
- SUBREG_8BIT = 1, SUBREG_8BIT_HI = 2, SUBREG_16BIT = 3, SUBREG_32BIT = 4
- };
-}
-
-/// DWARFFlavour - Flavour of dwarf regnumbers
-///
-namespace DWARFFlavour {
- enum {
- X86_64 = 0, X86_32_DarwinEH = 1, X86_32_Generic = 2
- };
-}
-
class X86RegisterInfo : public X86GenRegisterInfo {
public:
X86TargetMachine &TM;
///
unsigned SlotSize;
- /// StackAlign - Default stack alignment.
- ///
- unsigned StackAlign;
-
/// StackPtr - X86 physical register used as stack ptr.
///
unsigned StackPtr;
///
unsigned FramePtr;
+ /// BasePtr - X86 physical register used as a base ptr in complex stack
+ /// frames. I.e., when we need a 3rd base, not just SP and FP, due to
+ /// variable size stack objects.
+ unsigned BasePtr;
+
public:
X86RegisterInfo(X86TargetMachine &tm, const TargetInstrInfo &tii);
/// register identifier.
static unsigned getX86RegNum(unsigned RegNo);
- unsigned getStackAlignment() const { return StackAlign; }
+ // FIXME: This should be tablegen'd like getDwarfRegNum is
+ int getSEHRegNum(unsigned i) const;
- /// getDwarfRegNum - allows modification of X86GenRegisterInfo::getDwarfRegNum
- /// (created by TableGen) for target dependencies.
- int getDwarfRegNum(unsigned RegNum, bool isEH) const;
+ /// getCompactUnwindRegNum - This function maps the register to the number for
+ /// compact unwind encoding. Return -1 if the register isn't valid.
+ int getCompactUnwindRegNum(unsigned RegNum, bool isEH) const;
/// Code Generation virtual methods...
- ///
+ ///
+ virtual bool trackLivenessAfterRegAlloc(const MachineFunction &MF) const;
/// getMatchingSuperRegClass - Return a subclass of the specified register
/// class A so that each register in it has a sub-register of the
getMatchingSuperRegClass(const TargetRegisterClass *A,
const TargetRegisterClass *B, unsigned Idx) const;
+ virtual const TargetRegisterClass *
+ getSubClassWithSubReg(const TargetRegisterClass *RC, unsigned Idx) const;
+
+ const TargetRegisterClass*
+ getLargestLegalSuperClass(const TargetRegisterClass *RC) const;
+
/// getPointerRegClass - Returns a TargetRegisterClass used for pointer
/// values.
- const TargetRegisterClass *getPointerRegClass() const;
+ const TargetRegisterClass *
+ getPointerRegClass(const MachineFunction &MF, unsigned Kind = 0) const;
/// getCrossCopyRegClass - Returns a legal register class to copy a register
/// in the specified class to or from. Returns NULL if it is possible to copy
const TargetRegisterClass *
getCrossCopyRegClass(const TargetRegisterClass *RC) const;
+ unsigned getRegPressureLimit(const TargetRegisterClass *RC,
+ MachineFunction &MF) const;
+
/// getCalleeSavedRegs - Return a null-terminated list of all of the
/// callee-save registers on this target.
- const unsigned *getCalleeSavedRegs(const MachineFunction* MF = 0) const;
-
- /// getCalleeSavedRegClasses - Return a null-terminated list of the preferred
- /// register classes to spill each callee-saved register with. The order and
- /// length of this list match the getCalleeSavedRegs() list.
- const TargetRegisterClass* const*
- getCalleeSavedRegClasses(const MachineFunction *MF = 0) const;
+ const uint16_t *getCalleeSavedRegs(const MachineFunction* MF = 0) const;
+ const uint32_t *getCallPreservedMask(CallingConv::ID) const;
/// getReservedRegs - Returns a bitset indexed by physical register number
/// indicating if a register is a special register that has particular uses and
/// register scavenger to determine what registers are free.
BitVector getReservedRegs(const MachineFunction &MF) const;
- bool hasFP(const MachineFunction &MF) const;
+ bool hasBasePointer(const MachineFunction &MF) const;
- bool needsStackRealignment(const MachineFunction &MF) const;
+ bool canRealignStack(const MachineFunction &MF) const;
- bool hasReservedCallFrame(MachineFunction &MF) const;
+ bool needsStackRealignment(const MachineFunction &MF) const;
- bool hasReservedSpillSlot(MachineFunction &MF, unsigned Reg,
+ bool hasReservedSpillSlot(const MachineFunction &MF, unsigned Reg,
int &FrameIdx) const;
void eliminateCallFramePseudoInstr(MachineFunction &MF,
void eliminateFrameIndex(MachineBasicBlock::iterator MI,
int SPAdj, RegScavenger *RS = NULL) const;
- void processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
- RegScavenger *RS = NULL) const;
-
- void emitCalleeSavedFrameMoves(MachineFunction &MF, unsigned LabelId,
- unsigned FramePtr) const;
- void emitPrologue(MachineFunction &MF) const;
- void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
-
// Debug information queries.
- unsigned getRARegister() const;
- unsigned getFrameRegister(MachineFunction &MF) const;
- int getFrameIndexOffset(MachineFunction &MF, int FI) const;
- void getInitialFrameState(std::vector<MachineMove> &Moves) const;
+ unsigned getFrameRegister(const MachineFunction &MF) const;
+ unsigned getStackRegister() const { return StackPtr; }
+ unsigned getBaseRegister() const { return BasePtr; }
+ // FIXME: Move to FrameInfok
+ unsigned getSlotSize() const { return SlotSize; }
// Exception handling queries.
unsigned getEHExceptionRegister() const;
// 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
-unsigned getX86SubSuperRegister(unsigned, MVT, bool High=false);
+// e.g. getX86SubSuperRegister(X86::EAX, EVT::i16) return X86:AX
+unsigned getX86SubSuperRegister(unsigned, EVT, bool High=false);
} // End llvm namespace
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