mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-30 21:29:28 +00:00
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165402 91177308-0d34-0410-b5e6-96231b3b80d8
102 lines
4.2 KiB
C++
102 lines
4.2 KiB
C++
//==-- llvm/Target/TargetSelectionDAGInfo.h - SelectionDAG Info --*- C++ -*-==//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file declares the TargetSelectionDAGInfo class, which targets can
|
|
// subclass to parameterize the SelectionDAG lowering and instruction
|
|
// selection process.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_TARGET_TARGETSELECTIONDAGINFO_H
|
|
#define LLVM_TARGET_TARGETSELECTIONDAGINFO_H
|
|
|
|
#include "llvm/CodeGen/SelectionDAGNodes.h"
|
|
|
|
namespace llvm {
|
|
|
|
class DataLayout;
|
|
class TargetMachine;
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
/// TargetSelectionDAGInfo - Targets can subclass this to parameterize the
|
|
/// SelectionDAG lowering and instruction selection process.
|
|
///
|
|
class TargetSelectionDAGInfo {
|
|
TargetSelectionDAGInfo(const TargetSelectionDAGInfo &) LLVM_DELETED_FUNCTION;
|
|
void operator=(const TargetSelectionDAGInfo &) LLVM_DELETED_FUNCTION;
|
|
|
|
const DataLayout *TD;
|
|
|
|
protected:
|
|
const DataLayout *getDataLayout() const { return TD; }
|
|
|
|
public:
|
|
explicit TargetSelectionDAGInfo(const TargetMachine &TM);
|
|
virtual ~TargetSelectionDAGInfo();
|
|
|
|
/// EmitTargetCodeForMemcpy - Emit target-specific code that performs a
|
|
/// memcpy. This can be used by targets to provide code sequences for cases
|
|
/// that don't fit the target's parameters for simple loads/stores and can be
|
|
/// more efficient than using a library call. This function can return a null
|
|
/// SDValue if the target declines to use custom code and a different
|
|
/// lowering strategy should be used.
|
|
///
|
|
/// If AlwaysInline is true, the size is constant and the target should not
|
|
/// emit any calls and is strongly encouraged to attempt to emit inline code
|
|
/// even if it is beyond the usual threshold because this intrinsic is being
|
|
/// expanded in a place where calls are not feasible (e.g. within the prologue
|
|
/// for another call). If the target chooses to decline an AlwaysInline
|
|
/// request here, legalize will resort to using simple loads and stores.
|
|
virtual SDValue
|
|
EmitTargetCodeForMemcpy(SelectionDAG &DAG, DebugLoc dl,
|
|
SDValue Chain,
|
|
SDValue Op1, SDValue Op2,
|
|
SDValue Op3, unsigned Align, bool isVolatile,
|
|
bool AlwaysInline,
|
|
MachinePointerInfo DstPtrInfo,
|
|
MachinePointerInfo SrcPtrInfo) const {
|
|
return SDValue();
|
|
}
|
|
|
|
/// EmitTargetCodeForMemmove - Emit target-specific code that performs a
|
|
/// memmove. This can be used by targets to provide code sequences for cases
|
|
/// that don't fit the target's parameters for simple loads/stores and can be
|
|
/// more efficient than using a library call. This function can return a null
|
|
/// SDValue if the target declines to use custom code and a different
|
|
/// lowering strategy should be used.
|
|
virtual SDValue
|
|
EmitTargetCodeForMemmove(SelectionDAG &DAG, DebugLoc dl,
|
|
SDValue Chain,
|
|
SDValue Op1, SDValue Op2,
|
|
SDValue Op3, unsigned Align, bool isVolatile,
|
|
MachinePointerInfo DstPtrInfo,
|
|
MachinePointerInfo SrcPtrInfo) const {
|
|
return SDValue();
|
|
}
|
|
|
|
/// EmitTargetCodeForMemset - Emit target-specific code that performs a
|
|
/// memset. This can be used by targets to provide code sequences for cases
|
|
/// that don't fit the target's parameters for simple stores and can be more
|
|
/// efficient than using a library call. This function can return a null
|
|
/// SDValue if the target declines to use custom code and a different
|
|
/// lowering strategy should be used.
|
|
virtual SDValue
|
|
EmitTargetCodeForMemset(SelectionDAG &DAG, DebugLoc dl,
|
|
SDValue Chain,
|
|
SDValue Op1, SDValue Op2,
|
|
SDValue Op3, unsigned Align, bool isVolatile,
|
|
MachinePointerInfo DstPtrInfo) const {
|
|
return SDValue();
|
|
}
|
|
};
|
|
|
|
} // end llvm namespace
|
|
|
|
#endif
|