1 //===-- ARMSelectionDAGInfo.h - ARM SelectionDAG Info -----------*- 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 // This file defines the ARM subclass for SelectionDAGTargetInfo. 10 // 11 //===----------------------------------------------------------------------===// 12 13 #ifndef LLVM_LIB_TARGET_ARM_ARMSELECTIONDAGINFO_H 14 #define LLVM_LIB_TARGET_ARM_ARMSELECTIONDAGINFO_H 15 16 #include "MCTargetDesc/ARMAddressingModes.h" 17 #include "llvm/CodeGen/RuntimeLibcallUtil.h" 18 #include "llvm/CodeGen/SelectionDAGTargetInfo.h" 19 20 namespace llvm { 21 22 namespace ARM_AM { 23 static inline ShiftOpc getShiftOpcForNode(unsigned Opcode) { 24 switch (Opcode) { 25 default: return ARM_AM::no_shift; 26 case ISD::SHL: return ARM_AM::lsl; 27 case ISD::SRL: return ARM_AM::lsr; 28 case ISD::SRA: return ARM_AM::asr; 29 case ISD::ROTR: return ARM_AM::ror; 30 //case ISD::ROTL: // Only if imm -> turn into ROTR. 31 // Can't handle RRX here, because it would require folding a flag into 32 // the addressing mode. :( This causes us to miss certain things. 33 //case ARMISD::RRX: return ARM_AM::rrx; 34 } 35 } 36 } // end namespace ARM_AM 37 38 class ARMSelectionDAGInfo : public SelectionDAGTargetInfo { 39 public: 40 bool isTargetMemoryOpcode(unsigned Opcode) const override; 41 42 SDValue EmitTargetCodeForMemcpy(SelectionDAG &DAG, const SDLoc &dl, 43 SDValue Chain, SDValue Dst, SDValue Src, 44 SDValue Size, Align Alignment, 45 bool isVolatile, bool AlwaysInline, 46 MachinePointerInfo DstPtrInfo, 47 MachinePointerInfo SrcPtrInfo) const override; 48 49 SDValue 50 EmitTargetCodeForMemmove(SelectionDAG &DAG, const SDLoc &dl, SDValue Chain, 51 SDValue Dst, SDValue Src, SDValue Size, 52 Align Alignment, bool isVolatile, 53 MachinePointerInfo DstPtrInfo, 54 MachinePointerInfo SrcPtrInfo) const override; 55 56 // Adjust parameters for memset, see RTABI section 4.3.4 57 SDValue EmitTargetCodeForMemset(SelectionDAG &DAG, const SDLoc &dl, 58 SDValue Chain, SDValue Op1, SDValue Op2, 59 SDValue Op3, Align Alignment, bool isVolatile, 60 bool AlwaysInline, 61 MachinePointerInfo DstPtrInfo) const override; 62 63 SDValue EmitSpecializedLibcall(SelectionDAG &DAG, const SDLoc &dl, 64 SDValue Chain, SDValue Dst, SDValue Src, 65 SDValue Size, unsigned Align, 66 RTLIB::Libcall LC) const; 67 }; 68 69 } 70 71 #endif 72