1 //=- LoongArchISelDAGToDAG.h - A dag to dag inst selector for LoongArch ---===// 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 defines an instruction selector for the LoongArch target. 10 // 11 //===----------------------------------------------------------------------===// 12 13 #ifndef LLVM_LIB_TARGET_LOONGARCH_LOONGARCHISELDAGTODAG_H 14 #define LLVM_LIB_TARGET_LOONGARCH_LOONGARCHISELDAGTODAG_H 15 16 #include "LoongArch.h" 17 #include "LoongArchTargetMachine.h" 18 #include "llvm/CodeGen/SelectionDAGISel.h" 19 20 // LoongArch-specific code to select LoongArch machine instructions for 21 // SelectionDAG operations. 22 namespace llvm { 23 class LoongArchDAGToDAGISel : public SelectionDAGISel { 24 const LoongArchSubtarget *Subtarget = nullptr; 25 26 public: 27 static char ID; 28 29 LoongArchDAGToDAGISel() = delete; 30 31 explicit LoongArchDAGToDAGISel(LoongArchTargetMachine &TM) 32 : SelectionDAGISel(ID, TM) {} 33 34 bool runOnMachineFunction(MachineFunction &MF) override { 35 Subtarget = &MF.getSubtarget<LoongArchSubtarget>(); 36 return SelectionDAGISel::runOnMachineFunction(MF); 37 } 38 39 void Select(SDNode *Node) override; 40 41 bool SelectInlineAsmMemoryOperand(const SDValue &Op, 42 InlineAsm::ConstraintCode ConstraintID, 43 std::vector<SDValue> &OutOps) override; 44 45 bool SelectBaseAddr(SDValue Addr, SDValue &Base); 46 bool SelectAddrConstant(SDValue Addr, SDValue &Base, SDValue &Offset); 47 bool selectNonFIBaseAddr(SDValue Addr, SDValue &Base); 48 49 bool selectShiftMask(SDValue N, unsigned ShiftWidth, SDValue &ShAmt); 50 bool selectShiftMaskGRLen(SDValue N, SDValue &ShAmt) { 51 return selectShiftMask(N, Subtarget->getGRLen(), ShAmt); 52 } 53 bool selectShiftMask32(SDValue N, SDValue &ShAmt) { 54 return selectShiftMask(N, 32, ShAmt); 55 } 56 57 bool selectSExti32(SDValue N, SDValue &Val); 58 bool selectZExti32(SDValue N, SDValue &Val); 59 60 bool selectVSplat(SDNode *N, APInt &Imm, unsigned MinSizeInBits) const; 61 62 template <unsigned ImmSize, bool IsSigned = false> 63 bool selectVSplatImm(SDValue N, SDValue &SplatVal); 64 65 bool selectVSplatUimmInvPow2(SDValue N, SDValue &SplatImm) const; 66 bool selectVSplatUimmPow2(SDValue N, SDValue &SplatImm) const; 67 68 // Include the pieces autogenerated from the target description. 69 #include "LoongArchGenDAGISel.inc" 70 }; 71 72 } // end namespace llvm 73 74 #endif // LLVM_LIB_TARGET_LOONGARCH_LOONGARCHISELDAGTODAG_H 75