//
// The LLVM Compiler Infrastructure
//
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
-// This file contains the X86 implementation of the MRegisterInfo class.
+// This file contains the X86 implementation of the TargetRegisterInfo class.
//
//===----------------------------------------------------------------------===//
#ifndef X86REGISTERINFO_H
#define X86REGISTERINFO_H
-#include "llvm/Target/MRegisterInfo.h"
-
-class llvm::Type;
-
+#include "llvm/Target/TargetRegisterInfo.h"
#include "X86GenRegisterInfo.h.inc"
namespace llvm {
-
-struct X86RegisterInfo : public X86GenRegisterInfo {
- X86RegisterInfo();
+ 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
+ };
+}
+
+/// 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;
+ const TargetInstrInfo &TII;
+
+private:
+ /// Is64Bit - Is the target 64-bits.
+ ///
+ bool Is64Bit;
+
+ /// IsWin64 - Is the target on of win64 flavours
+ ///
+ bool IsWin64;
+
+ /// SlotSize - Stack slot size in bytes.
+ ///
+ unsigned SlotSize;
+
+ /// StackAlign - Default stack alignment.
+ ///
+ unsigned StackAlign;
+
+ /// StackPtr - X86 physical register used as stack ptr.
+ ///
+ unsigned StackPtr;
+
+ /// FramePtr - X86 physical register used as frame ptr.
+ ///
+ unsigned FramePtr;
+
+public:
+ X86RegisterInfo(X86TargetMachine &tm, const TargetInstrInfo &tii);
+
+ /// getX86RegNum - Returns the native X86 register number for the given LLVM
+ /// register identifier.
+ static unsigned getX86RegNum(unsigned RegNo);
+
+ unsigned getStackAlignment() const { return StackAlign; }
+
+ /// getDwarfRegNum - allows modification of X86GenRegisterInfo::getDwarfRegNum
+ /// (created by TableGen) for target dependencies.
+ int getDwarfRegNum(unsigned RegNum, bool isEH) const;
/// Code Generation virtual methods...
- void storeRegToStackSlot(MachineBasicBlock &MBB,
- MachineBasicBlock::iterator MI,
- unsigned SrcReg, int FrameIndex,
- const TargetRegisterClass *RC) const;
-
- void loadRegFromStackSlot(MachineBasicBlock &MBB,
- MachineBasicBlock::iterator MI,
- unsigned DestReg, int FrameIndex,
- const TargetRegisterClass *RC) const;
-
- void copyRegToReg(MachineBasicBlock &MBB,
- MachineBasicBlock::iterator MI,
- unsigned DestReg, unsigned SrcReg,
- const TargetRegisterClass *RC) const;
-
- /// foldMemoryOperand - If this target supports it, fold a load or store of
- /// the specified stack slot into the specified machine instruction for the
- /// specified operand. If this is possible, the target should perform the
- /// folding and return true, otherwise it should return false. If it folds
- /// the instruction, it is likely that the MachineInstruction the iterator
- /// references has been changed.
- virtual MachineInstr* foldMemoryOperand(MachineInstr* MI,
- unsigned OpNum,
- int FrameIndex) const;
+ ///
+
+ /// getMatchingSuperRegClass - Return a subclass of the specified register
+ /// class A so that each register in it has a sub-register of the
+ /// specified sub-register index which is in the specified register class B.
+ virtual const TargetRegisterClass *
+ getMatchingSuperRegClass(const TargetRegisterClass *A,
+ const TargetRegisterClass *B, unsigned Idx) const;
+
+ /// getPointerRegClass - Returns a TargetRegisterClass used for pointer
+ /// values.
+ const TargetRegisterClass *getPointerRegClass(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
+ /// between a two registers of the specified class.
+ const TargetRegisterClass *
+ getCrossCopyRegClass(const TargetRegisterClass *RC) 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;
+ /// getReservedRegs - Returns a bitset indexed by physical register number
+ /// indicating if a register is a special register that has particular uses and
+ /// should be considered unavailable at all times, e.g. SP, RA. This is used by
+ /// register scavenger to determine what registers are free.
+ BitVector getReservedRegs(const MachineFunction &MF) const;
+
+ bool canRealignStack(const MachineFunction &MF) const;
+
+ bool needsStackRealignment(const MachineFunction &MF) const;
+
+ bool hasReservedSpillSlot(const MachineFunction &MF, unsigned Reg,
+ int &FrameIdx) const;
void eliminateCallFramePseudoInstr(MachineFunction &MF,
MachineBasicBlock &MBB,
MachineBasicBlock::iterator MI) const;
- void eliminateFrameIndex(MachineBasicBlock::iterator MI) const;
-
- void processFunctionBeforeFrameFinalized(MachineFunction &MF) const;
-
- void emitPrologue(MachineFunction &MF) const;
- void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
+ void eliminateFrameIndex(MachineBasicBlock::iterator MI,
+ int SPAdj, RegScavenger *RS = NULL) const;
// Debug information queries.
- unsigned getFrameRegister(MachineFunction &MF) const;
+ unsigned getRARegister() const;
+ unsigned getFrameRegister(const MachineFunction &MF) const;
+ unsigned getStackRegister() const { return StackPtr; }
+ // FIXME: Move to FrameInfok
+ unsigned getSlotSize() const { return SlotSize; }
+
+ // Exception handling queries.
+ unsigned getEHExceptionRegister() const;
+ unsigned getEHHandlerRegister() const;
};
+// getX86SubSuperRegister - X86 utility function. It returns the sub or super
+// register of a specific X86 register.
+// e.g. getX86SubSuperRegister(X86::EAX, EVT::i16) return X86:AX
+unsigned getX86SubSuperRegister(unsigned, EVT, bool High=false);
+
} // End llvm namespace
#endif