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+//===- PIC16InstrInfo.h - PIC16 Instruction Information----------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the niversity of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains the PIC16 implementation of the TargetInstrInfo class.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef PIC16INSTRUCTIONINFO_H
+#define PIC16INSTRUCTIONINFO_H
+
+#include "PIC16.h"
+#include "PIC16RegisterInfo.h"
+#include "llvm/Target/TargetInstrInfo.h"
+
+namespace llvm {
+
+
+class PIC16InstrInfo : public TargetInstrInfoImpl
+{
+ PIC16TargetMachine &TM;
+ const PIC16RegisterInfo RI;
+public:
+ explicit PIC16InstrInfo(PIC16TargetMachine &TM);
+
+ /// getRegisterInfo - TargetInstrInfo is a superset of MRegister info. As
+ /// such, whenever a client has an instance of instruction info, it should
+ /// always be able to get register info as well (through this method).
+ ///
+ virtual const TargetRegisterInfo &getRegisterInfo() const { return RI; }
+
+
+ /// isLoadFromStackSlot - If the specified machine instruction is a direct
+ /// load from a stack slot, return the virtual or physical register number of
+ /// the destination along with the FrameIndex of the loaded stack slot. If
+ /// not, return 0. This predicate must return 0 if the instruction has
+ /// any side effects other than loading from the stack slot.
+ virtual unsigned isLoadFromStackSlot(MachineInstr *MI, int &FrameIndex) const;
+
+ /// isStoreToStackSlot - If the specified machine instruction is a direct
+ /// store to a stack slot, return the virtual or physical register number of
+ /// the source reg along with the FrameIndex of the loaded stack slot. If
+ /// not, return 0. This predicate must return 0 if the instruction has
+ /// any side effects other than storing to the stack slot.
+ virtual unsigned isStoreToStackSlot(MachineInstr *MI, int &FrameIndex) const;
+
+ /// Used for spilling a register
+ void storeRegToStackSlot(MachineBasicBlock &MBB,
+ MachineBasicBlock::iterator MI,
+ unsigned SrcReg, bool isKill, int FrameIndex,
+ const TargetRegisterClass *RC) const;
+
+
+ void loadRegFromStackSlot(MachineBasicBlock &MBB,
+ MachineBasicBlock::iterator MI,
+ unsigned DestReg, int FrameIndex,
+ const TargetRegisterClass *RC) const;
+
+ /// InsertBranch - Insert a branch into the end of the specified
+ /// MachineBasicBlock. This operands to this method are the same as those
+ /// returned by AnalyzeBranch. This is invoked in cases where AnalyzeBranch
+ /// returns success and when an unconditional branch (TBB is non-null, FBB is
+ /// null, Cond is empty) needs to be inserted. It returns the number of
+ /// instructions inserted.
+ virtual unsigned InsertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB,
+ MachineBasicBlock *FBB,
+ const std::vector<MachineOperand> &Cond) const ;
+
+};
+
+} // namespace llvm
+
+#endif