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, CodeGenOptLevel 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
50class Mips16DAGToDAGISelLegacy : public MipsDAGToDAGISelLegacy {
51public:
52 explicit Mips16DAGToDAGISelLegacy(MipsTargetMachine &TM, CodeGenOptLevel OL);
53};
54
55FunctionPass *createMips16ISelDag(MipsTargetMachine &TM,
56 CodeGenOptLevel OptLevel);
57}
58
59#endif
60