1 //===-- ARMSelectionDAGInfo.h - ARM SelectionDAG Info -----------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines the ARM subclass for TargetSelectionDAGInfo.
12 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_LIB_TARGET_ARM_ARMSELECTIONDAGINFO_H
15 #define LLVM_LIB_TARGET_ARM_ARMSELECTIONDAGINFO_H
17 #include "MCTargetDesc/ARMAddressingModes.h"
18 #include "llvm/Target/TargetSelectionDAGInfo.h"
23 static inline ShiftOpc getShiftOpcForNode(unsigned 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;
36 } // end namespace ARM_AM
38 class ARMSelectionDAGInfo : public TargetSelectionDAGInfo {
41 SDValue EmitTargetCodeForMemcpy(SelectionDAG &DAG, SDLoc dl,
43 SDValue Dst, SDValue Src,
44 SDValue Size, unsigned Align,
45 bool isVolatile, bool AlwaysInline,
46 MachinePointerInfo DstPtrInfo,
47 MachinePointerInfo SrcPtrInfo) const override;
49 SDValue EmitTargetCodeForMemmove(SelectionDAG &DAG, SDLoc dl,
51 SDValue Dst, SDValue Src,
52 SDValue Size, unsigned Align, bool isVolatile,
53 MachinePointerInfo DstPtrInfo,
54 MachinePointerInfo SrcPtrInfo) const override;
56 // Adjust parameters for memset, see RTABI section 4.3.4
57 SDValue EmitTargetCodeForMemset(SelectionDAG &DAG, SDLoc dl,
59 SDValue Op1, SDValue Op2,
60 SDValue Op3, unsigned Align,
62 MachinePointerInfo DstPtrInfo) const override;
64 SDValue EmitSpecializedLibcall(SelectionDAG &DAG, SDLoc dl,
66 SDValue Dst, SDValue Src,
67 SDValue Size, unsigned Align,
68 RTLIB::Libcall LC) const;