2002-12-28 20:32:54 +00:00
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//===- X86RegisterInfo.h - X86 Register Information Impl --------*- C++ -*-===//
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2005-04-21 23:38:14 +00:00
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//
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2003-10-21 15:17:13 +00:00
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by the LLVM research group and is distributed under
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// the University of Illinois Open Source License. See LICENSE.TXT for details.
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2005-04-21 23:38:14 +00:00
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//
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2003-10-21 15:17:13 +00:00
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//===----------------------------------------------------------------------===//
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2002-10-25 22:55:53 +00:00
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//
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// This file contains the X86 implementation of the MRegisterInfo class.
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//
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//===----------------------------------------------------------------------===//
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#ifndef X86REGISTERINFO_H
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#define X86REGISTERINFO_H
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#include "llvm/Target/MRegisterInfo.h"
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2003-08-03 15:48:14 +00:00
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#include "X86GenRegisterInfo.h.inc"
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2002-12-25 05:06:43 +00:00
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2003-11-11 22:41:34 +00:00
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namespace llvm {
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class Type;
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class TargetInstrInfo;
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class X86TargetMachine;
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2006-11-05 19:31:28 +00:00
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class X86RegisterInfo : public X86GenRegisterInfo {
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public:
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X86TargetMachine &TM;
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const TargetInstrInfo &TII;
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2006-09-08 06:48:29 +00:00
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private:
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/// Is64Bit - Is the target 64-bits.
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bool Is64Bit;
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/// SlotSize - Stack slot size in bytes.
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unsigned SlotSize;
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/// StackPtr - X86 physical register used as stack ptr.
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unsigned StackPtr;
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/// FramePtr - X86 physical register used as frame ptr.
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unsigned FramePtr;
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public:
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X86RegisterInfo(X86TargetMachine &tm, const TargetInstrInfo &tii);
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2002-12-28 20:32:54 +00:00
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/// Code Generation virtual methods...
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2004-08-15 22:15:11 +00:00
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void storeRegToStackSlot(MachineBasicBlock &MBB,
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MachineBasicBlock::iterator MI,
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2005-09-30 01:29:42 +00:00
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unsigned SrcReg, int FrameIndex,
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const TargetRegisterClass *RC) const;
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void loadRegFromStackSlot(MachineBasicBlock &MBB,
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MachineBasicBlock::iterator MI,
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unsigned DestReg, int FrameIndex,
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const TargetRegisterClass *RC) const;
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2004-08-15 22:15:11 +00:00
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void copyRegToReg(MachineBasicBlock &MBB,
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MachineBasicBlock::iterator MI,
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unsigned DestReg, unsigned SrcReg,
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const TargetRegisterClass *RC) const;
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2004-02-17 05:54:57 +00:00
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/// foldMemoryOperand - If this target supports it, fold a load or store of
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/// the specified stack slot into the specified machine instruction for the
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/// specified operand. If this is possible, the target should perform the
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/// folding and return true, otherwise it should return false. If it folds
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/// the instruction, it is likely that the MachineInstruction the iterator
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/// references has been changed.
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MachineInstr* foldMemoryOperand(MachineInstr* MI,
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unsigned OpNum,
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int FrameIndex) const;
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2007-01-02 21:33:40 +00:00
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/// getCalleeSavedRegs - Return a null-terminated list of all of the
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/// callee-save registers on this target.
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const unsigned *getCalleeSavedRegs() const;
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2007-01-02 21:33:40 +00:00
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/// getCalleeSavedRegClasses - Return a null-terminated list of the preferred
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/// register classes to spill each callee-saved register with. The order and
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/// length of this list match the getCalleeSavedRegs() list.
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const TargetRegisterClass* const* getCalleeSavedRegClasses() const;
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2004-02-17 04:33:18 +00:00
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2007-02-19 21:49:54 +00:00
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/// getReservedRegs - Returns a bitset indexed by physical register number
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/// indicating if a register is a special register that has particular uses and
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/// should be considered unavailable at all times, e.g. SP, RA. This is used by
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/// register scavenger to determine what registers are free.
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BitVector getReservedRegs(const MachineFunction &MF) const;
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2007-01-23 00:57:47 +00:00
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bool hasFP(const MachineFunction &MF) const;
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2004-02-14 19:49:54 +00:00
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void eliminateCallFramePseudoInstr(MachineFunction &MF,
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MachineBasicBlock &MBB,
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MachineBasicBlock::iterator MI) const;
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2002-12-13 09:54:12 +00:00
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2004-08-14 22:05:10 +00:00
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void eliminateFrameIndex(MachineBasicBlock::iterator MI) const;
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2002-11-20 18:59:43 +00:00
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2004-02-14 19:49:54 +00:00
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void processFunctionBeforeFrameFinalized(MachineFunction &MF) const;
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2002-12-03 23:11:21 +00:00
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2004-02-14 19:49:54 +00:00
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void emitPrologue(MachineFunction &MF) const;
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void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
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2006-03-23 18:12:57 +00:00
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2006-03-28 13:48:33 +00:00
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// Debug information queries.
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2006-04-07 16:34:46 +00:00
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unsigned getRARegister() const;
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2006-03-28 13:48:33 +00:00
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unsigned getFrameRegister(MachineFunction &MF) const;
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2007-01-24 19:15:24 +00:00
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void getInitialFrameState(std::vector<MachineMove> &Moves) const;
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2007-02-21 22:54:50 +00:00
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// Exception handling queries.
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unsigned getEHExceptionRegister() const;
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unsigned getEHHandlerRegister() const;
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2002-10-25 22:55:53 +00:00
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};
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2006-05-05 05:40:20 +00:00
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// getX86SubSuperRegister - X86 utility function. It returns the sub or super
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// register of a specific X86 register.
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// e.g. getX86SubSuperRegister(X86::EAX, MVT::i16) return X86:AX
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unsigned getX86SubSuperRegister(unsigned, MVT::ValueType, bool High=false);
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2003-11-11 22:41:34 +00:00
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} // End llvm namespace
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2002-10-25 22:55:53 +00:00
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#endif
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