1 //===---- Mips16ISelDAGToDAG.h - A Dag to Dag Inst Selector for Mips ------===//
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
7 //===----------------------------------------------------------------------===//
9 // Subclass of MipsDAGToDAGISel specialized for mips16.
11 //===----------------------------------------------------------------------===//
13 #ifndef LLVM_LIB_TARGET_MIPS_MIPS16ISELDAGTODAG_H
14 #define LLVM_LIB_TARGET_MIPS_MIPS16ISELDAGTODAG_H
16 #include "MipsISelDAGToDAG.h"
20 class Mips16DAGToDAGISel : public MipsDAGToDAGISel {
22 explicit Mips16DAGToDAGISel(MipsTargetMachine &TM, CodeGenOpt::Level OL)
23 : MipsDAGToDAGISel(TM, OL) {}
26 std::pair<SDNode *, SDNode *> selectMULT(SDNode *N, unsigned Opc,
27 const SDLoc &DL, EVT Ty, bool HasLo,
30 bool runOnMachineFunction(MachineFunction &MF) override;
32 bool selectAddr(bool SPAllowed, SDValue Addr, SDValue &Base,
34 bool selectAddr16(SDValue Addr, SDValue &Base,
35 SDValue &Offset) override;
36 bool selectAddr16SP(SDValue Addr, SDValue &Base,
37 SDValue &Offset) override;
39 bool trySelect(SDNode *Node) override;
41 void processFunctionAfterISel(MachineFunction &MF) override;
43 // Insert instructions to initialize the global base register in the
44 // first MBB of the function.
45 void initGlobalBaseReg(MachineFunction &MF);
47 void initMips16SPAliasReg(MachineFunction &MF);
50 FunctionPass *createMips16ISelDag(MipsTargetMachine &TM,
51 CodeGenOpt::Level OptLevel);