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 ARMSELECTIONDAGINFO_H
15 #define 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 {
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;
44 explicit ARMSelectionDAGInfo(const TargetMachine &TM);
45 ~ARMSelectionDAGInfo();
47 SDValue EmitTargetCodeForMemcpy(SelectionDAG &DAG, SDLoc dl,
49 SDValue Dst, SDValue Src,
50 SDValue Size, unsigned Align,
51 bool isVolatile, bool AlwaysInline,
52 MachinePointerInfo DstPtrInfo,
53 MachinePointerInfo SrcPtrInfo) const override;
55 // Adjust parameters for memset, see RTABI section 4.3.4
56 SDValue EmitTargetCodeForMemset(SelectionDAG &DAG, SDLoc dl,
58 SDValue Op1, SDValue Op2,
59 SDValue Op3, unsigned Align,
61 MachinePointerInfo DstPtrInfo) const override;