contrib/llvm/lib/Target/Mips/MipsSEISelLowering.h

   1 //===- MipsSEISelLowering.h - MipsSE DAG Lowering Interface -----*- 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 // Subclass of MipsTargetLowering specialized for mips32/64.
  10 //
  11 //===----------------------------------------------------------------------===//
  12
  13 #ifndef LLVM_LIB_TARGET_MIPS_MIPSSEISELLOWERING_H
  14 #define LLVM_LIB_TARGET_MIPS_MIPSSEISELLOWERING_H
  15
  16 #include "MipsISelLowering.h"
  17 #include "llvm/CodeGen/SelectionDAGNodes.h"
  18 #include "llvm/Support/MachineValueType.h"
  19
  20 namespace llvm {
  21
  22 class MachineBasicBlock;
  23 class MachineInstr;
  24 class MipsSubtarget;
  25 class MipsTargetMachine;
  26 class SelectionDAG;
  27 class TargetRegisterClass;
  28
  29   class MipsSETargetLowering : public MipsTargetLowering  {
  30   public:
  31     explicit MipsSETargetLowering(const MipsTargetMachine &TM,
  32                                   const MipsSubtarget &STI);
  33
  34     /// Enable MSA support for the given integer type and Register
  35     /// class.
  36     void addMSAIntType(MVT::SimpleValueType Ty, const TargetRegisterClass *RC);
  37
  38     /// Enable MSA support for the given floating-point type and
  39     /// Register class.
  40     void addMSAFloatType(MVT::SimpleValueType Ty,
  41                          const TargetRegisterClass *RC);
  42
  43     bool allowsMisalignedMemoryAccesses(
  44         EVT VT, unsigned AS = 0, unsigned Align = 1,
  45         MachineMemOperand::Flags Flags = MachineMemOperand::MONone,
  46         bool *Fast = nullptr) const override;
  47
  48     SDValue LowerOperation(SDValue Op, SelectionDAG &DAG) const override;
  49
  50     SDValue PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const override;
  51
  52     MachineBasicBlock *
  53     EmitInstrWithCustomInserter(MachineInstr &MI,
  54                                 MachineBasicBlock *MBB) const override;
  55
  56     bool isShuffleMaskLegal(ArrayRef<int> Mask, EVT VT) const override {
  57       return false;
  58     }
  59
  60     const TargetRegisterClass *getRepRegClassFor(MVT VT) const override;
  61
  62   private:
  63     bool isEligibleForTailCallOptimization(
  64         const CCState &CCInfo, unsigned NextStackOffset,
  65         const MipsFunctionInfo &FI) const override;
  66
  67     void
  68     getOpndList(SmallVectorImpl<SDValue> &Ops,
  69                 std::deque<std::pair<unsigned, SDValue>> &RegsToPass,
  70                 bool IsPICCall, bool GlobalOrExternal, bool InternalLinkage,
  71                 bool IsCallReloc, CallLoweringInfo &CLI, SDValue Callee,
  72                 SDValue Chain) const override;
  73
  74     SDValue lowerLOAD(SDValue Op, SelectionDAG &DAG) const;
  75     SDValue lowerSTORE(SDValue Op, SelectionDAG &DAG) const;
  76     SDValue lowerBITCAST(SDValue Op, SelectionDAG &DAG) const;
  77
  78     SDValue lowerMulDiv(SDValue Op, unsigned NewOpc, bool HasLo, bool HasHi,
  79                         SelectionDAG &DAG) const;
  80
  81     SDValue lowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG) const;
  82     SDValue lowerINTRINSIC_W_CHAIN(SDValue Op, SelectionDAG &DAG) const;
  83     SDValue lowerINTRINSIC_VOID(SDValue Op, SelectionDAG &DAG) const;
  84     SDValue lowerEXTRACT_VECTOR_ELT(SDValue Op, SelectionDAG &DAG) const;
  85     SDValue lowerBUILD_VECTOR(SDValue Op, SelectionDAG &DAG) const;
  86     /// Lower VECTOR_SHUFFLE into one of a number of instructions
  87     /// depending on the indices in the shuffle.
  88     SDValue lowerVECTOR_SHUFFLE(SDValue Op, SelectionDAG &DAG) const;
  89     SDValue lowerSELECT(SDValue Op, SelectionDAG &DAG) const;
  90
  91     MachineBasicBlock *emitBPOSGE32(MachineInstr &MI,
  92                                     MachineBasicBlock *BB) const;
  93     MachineBasicBlock *emitMSACBranchPseudo(MachineInstr &MI,
  94                                             MachineBasicBlock *BB,
  95                                             unsigned BranchOp) const;
  96     /// Emit the COPY_FW pseudo instruction
  97     MachineBasicBlock *emitCOPY_FW(MachineInstr &MI,
  98                                    MachineBasicBlock *BB) const;
  99     /// Emit the COPY_FD pseudo instruction
 100     MachineBasicBlock *emitCOPY_FD(MachineInstr &MI,
 101                                    MachineBasicBlock *BB) const;
 102     /// Emit the INSERT_FW pseudo instruction
 103     MachineBasicBlock *emitINSERT_FW(MachineInstr &MI,
 104                                      MachineBasicBlock *BB) const;
 105     /// Emit the INSERT_FD pseudo instruction
 106     MachineBasicBlock *emitINSERT_FD(MachineInstr &MI,
 107                                      MachineBasicBlock *BB) const;
 108     /// Emit the INSERT_([BHWD]|F[WD])_VIDX pseudo instruction
 109     MachineBasicBlock *emitINSERT_DF_VIDX(MachineInstr &MI,
 110                                           MachineBasicBlock *BB,
 111                                           unsigned EltSizeInBytes,
 112                                           bool IsFP) const;
 113     /// Emit the FILL_FW pseudo instruction
 114     MachineBasicBlock *emitFILL_FW(MachineInstr &MI,
 115                                    MachineBasicBlock *BB) const;
 116     /// Emit the FILL_FD pseudo instruction
 117     MachineBasicBlock *emitFILL_FD(MachineInstr &MI,
 118                                    MachineBasicBlock *BB) const;
 119     /// Emit the FEXP2_W_1 pseudo instructions.
 120     MachineBasicBlock *emitFEXP2_W_1(MachineInstr &MI,
 121                                      MachineBasicBlock *BB) const;
 122     /// Emit the FEXP2_D_1 pseudo instructions.
 123     MachineBasicBlock *emitFEXP2_D_1(MachineInstr &MI,
 124                                      MachineBasicBlock *BB) const;
 125     /// Emit the FILL_FW pseudo instruction
 126     MachineBasicBlock *emitLD_F16_PSEUDO(MachineInstr &MI,
 127                                    MachineBasicBlock *BB) const;
 128     /// Emit the FILL_FD pseudo instruction
 129     MachineBasicBlock *emitST_F16_PSEUDO(MachineInstr &MI,
 130                                    MachineBasicBlock *BB) const;
 131     /// Emit the FEXP2_W_1 pseudo instructions.
 132     MachineBasicBlock *emitFPEXTEND_PSEUDO(MachineInstr &MI,
 133                                            MachineBasicBlock *BB,
 134                                            bool IsFGR64) const;
 135     /// Emit the FEXP2_D_1 pseudo instructions.
 136     MachineBasicBlock *emitFPROUND_PSEUDO(MachineInstr &MI,
 137                                           MachineBasicBlock *BBi,
 138                                           bool IsFGR64) const;
 139   };
 140
 141 } // end namespace llvm
 142
 143 #endif // LLVM_LIB_TARGET_MIPS_MIPSSEISELLOWERING_H