1 //===-- ARMSelectionDAGInfo.h - ARM SelectionDAG Info -----------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file defines the ARM subclass for TargetSelectionDAGInfo. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #ifndef ARMSELECTIONDAGINFO_H 15 #define ARMSELECTIONDAGINFO_H 16 17 #include "MCTargetDesc/ARMAddressingModes.h" 18 #include "llvm/Target/TargetSelectionDAGInfo.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 TargetSelectionDAGInfo { 39 /// Subtarget - Keep a pointer to the ARMSubtarget around so that we can 40 /// make the right decision when generating code for different targets. 41 const ARMSubtarget *Subtarget; 42 43 public: 44 explicit ARMSelectionDAGInfo(const TargetMachine &TM); 45 ~ARMSelectionDAGInfo(); 46 47 virtual 48 SDValue EmitTargetCodeForMemcpy(SelectionDAG &DAG, DebugLoc dl, 49 SDValue Chain, 50 SDValue Dst, SDValue Src, 51 SDValue Size, unsigned Align, 52 bool isVolatile, bool AlwaysInline, 53 MachinePointerInfo DstPtrInfo, 54 MachinePointerInfo SrcPtrInfo) const; 55 56 // Adjust parameters for memset, see RTABI section 4.3.4 57 virtual 58 SDValue EmitTargetCodeForMemset(SelectionDAG &DAG, DebugLoc dl, 59 SDValue Chain, 60 SDValue Op1, SDValue Op2, 61 SDValue Op3, unsigned Align, 62 bool isVolatile, 63 MachinePointerInfo DstPtrInfo) const; 64 }; 65 66 } 67 68 #endif 69
