1 //===-- MSP430InstrInfo.h - MSP430 Instruction Information ------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This file contains the MSP430 implementation of the TargetInstrInfo class.
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #ifndef LLVM_LIB_TARGET_MSP430_MSP430INSTRINFO_H
14 #define LLVM_LIB_TARGET_MSP430_MSP430INSTRINFO_H
15 
16 #include "MSP430RegisterInfo.h"
17 #include "llvm/CodeGen/TargetInstrInfo.h"
18 
19 #define GET_INSTRINFO_HEADER
20 #include "MSP430GenInstrInfo.inc"
21 
22 namespace llvm {
23 
24 class MSP430Subtarget;
25 
26 class MSP430InstrInfo : public MSP430GenInstrInfo {
27   const MSP430RegisterInfo RI;
28   virtual void anchor();
29 public:
30   explicit MSP430InstrInfo(MSP430Subtarget &STI);
31 
32   /// getRegisterInfo - TargetInstrInfo is a superset of MRegister info.  As
33   /// such, whenever a client has an instance of instruction info, it should
34   /// always be able to get register info as well (through this method).
35   ///
36   const MSP430RegisterInfo &getRegisterInfo() const { return RI; }
37 
38   void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
39                    const DebugLoc &DL, MCRegister DestReg, MCRegister SrcReg,
40                    bool KillSrc) const override;
41 
42   void storeRegToStackSlot(MachineBasicBlock &MBB,
43                            MachineBasicBlock::iterator MI, Register SrcReg,
44                            bool isKill, int FrameIndex,
45                            const TargetRegisterClass *RC,
46                            const TargetRegisterInfo *TRI,
47                            Register VReg) const override;
48   void loadRegFromStackSlot(MachineBasicBlock &MBB,
49                             MachineBasicBlock::iterator MI, Register DestReg,
50                             int FrameIdx, const TargetRegisterClass *RC,
51                             const TargetRegisterInfo *TRI,
52                             Register VReg) const override;
53 
54   unsigned getInstSizeInBytes(const MachineInstr &MI) const override;
55 
56   // Branch folding goodness
57   bool
58   reverseBranchCondition(SmallVectorImpl<MachineOperand> &Cond) const override;
59   bool analyzeBranch(MachineBasicBlock &MBB, MachineBasicBlock *&TBB,
60                      MachineBasicBlock *&FBB,
61                      SmallVectorImpl<MachineOperand> &Cond,
62                      bool AllowModify) const override;
63 
64   unsigned removeBranch(MachineBasicBlock &MBB,
65                         int *BytesRemoved = nullptr) const override;
66   unsigned insertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB,
67                         MachineBasicBlock *FBB, ArrayRef<MachineOperand> Cond,
68                         const DebugLoc &DL,
69                         int *BytesAdded = nullptr) const override;
70 
71   int64_t getFramePoppedByCallee(const MachineInstr &I) const {
72     assert(isFrameInstr(I) && "Not a frame instruction");
73     assert(I.getOperand(1).getImm() >= 0 && "Size must not be negative");
74     return I.getOperand(1).getImm();
75   }
76 };
77 
78 }
79 
80 #endif
81