1//===---- Mips16ISelDAGToDAG.h - A Dag to Dag Inst Selector for Mips ------===//
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// Subclass of MipsDAGToDAGISel specialized for mips16.
10//
11//===----------------------------------------------------------------------===//
12
13#ifndef LLVM_LIB_TARGET_MIPS_MIPS16ISELDAGTODAG_H
14#define LLVM_LIB_TARGET_MIPS_MIPS16ISELDAGTODAG_H
15
16#include "MipsISelDAGToDAG.h"
17
18namespace llvm {
19
20class Mips16DAGToDAGISel : public MipsDAGToDAGISel {
21public:
22  explicit Mips16DAGToDAGISel(MipsTargetMachine &TM, CodeGenOpt::Level OL)
23      : MipsDAGToDAGISel(TM, OL) {}
24
25private:
26  std::pair<SDNode *, SDNode *> selectMULT(SDNode *N, unsigned Opc,
27                                           const SDLoc &DL, EVT Ty, bool HasLo,
28                                           bool HasHi);
29
30  bool runOnMachineFunction(MachineFunction &MF) override;
31
32  bool selectAddr(bool SPAllowed, SDValue Addr, SDValue &Base,
33                  SDValue &Offset);
34  bool selectAddr16(SDValue Addr, SDValue &Base,
35                    SDValue &Offset) override;
36  bool selectAddr16SP(SDValue Addr, SDValue &Base,
37                      SDValue &Offset) override;
38
39  bool trySelect(SDNode *Node) override;
40
41  void processFunctionAfterISel(MachineFunction &MF) override;
42
43  // Insert instructions to initialize the global base register in the
44  // first MBB of the function.
45  void initGlobalBaseReg(MachineFunction &MF);
46
47  void initMips16SPAliasReg(MachineFunction &MF);
48};
49
50FunctionPass *createMips16ISelDag(MipsTargetMachine &TM,
51                                  CodeGenOpt::Level OptLevel);
52}
53
54#endif
55