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https://github.com/c64scene-ar/llvm-6502.git
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e72f2027e9
instead of srcvalue/offset pairs. This corrects SV info for mem operations whose size is > 32-bits. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@114401 91177308-0d34-0410-b5e6-96231b3b80d8
102 lines
4.2 KiB
C++
102 lines
4.2 KiB
C++
//==-- llvm/Target/TargetSelectionDAGInfo.h - SelectionDAG Info --*- C++ -*-==//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file declares the TargetSelectionDAGInfo class, which targets can
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// subclass to parameterize the SelectionDAG lowering and instruction
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// selection process.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_TARGET_TARGETSELECTIONDAGINFO_H
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#define LLVM_TARGET_TARGETSELECTIONDAGINFO_H
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#include "llvm/CodeGen/SelectionDAGNodes.h"
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namespace llvm {
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class TargetData;
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class TargetMachine;
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//===----------------------------------------------------------------------===//
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/// TargetSelectionDAGInfo - Targets can subclass this to parameterize the
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/// SelectionDAG lowering and instruction selection process.
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///
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class TargetSelectionDAGInfo {
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TargetSelectionDAGInfo(const TargetSelectionDAGInfo &); // DO NOT IMPLEMENT
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void operator=(const TargetSelectionDAGInfo &); // DO NOT IMPLEMENT
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const TargetData *TD;
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protected:
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const TargetData *getTargetData() const { return TD; }
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public:
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explicit TargetSelectionDAGInfo(const TargetMachine &TM);
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virtual ~TargetSelectionDAGInfo();
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/// EmitTargetCodeForMemcpy - Emit target-specific code that performs a
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/// memcpy. This can be used by targets to provide code sequences for cases
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/// that don't fit the target's parameters for simple loads/stores and can be
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/// more efficient than using a library call. This function can return a null
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/// SDValue if the target declines to use custom code and a different
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/// lowering strategy should be used.
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///
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/// If AlwaysInline is true, the size is constant and the target should not
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/// emit any calls and is strongly encouraged to attempt to emit inline code
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/// even if it is beyond the usual threshold because this intrinsic is being
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/// expanded in a place where calls are not feasible (e.g. within the prologue
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/// for another call). If the target chooses to decline an AlwaysInline
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/// request here, legalize will resort to using simple loads and stores.
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virtual SDValue
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EmitTargetCodeForMemcpy(SelectionDAG &DAG, DebugLoc dl,
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SDValue Chain,
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SDValue Op1, SDValue Op2,
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SDValue Op3, unsigned Align, bool isVolatile,
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bool AlwaysInline,
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MachinePointerInfo DstPtrInfo,
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MachinePointerInfo SrcPtrInfo) const {
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return SDValue();
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}
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/// EmitTargetCodeForMemmove - Emit target-specific code that performs a
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/// memmove. This can be used by targets to provide code sequences for cases
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/// that don't fit the target's parameters for simple loads/stores and can be
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/// more efficient than using a library call. This function can return a null
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/// SDValue if the target declines to use custom code and a different
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/// lowering strategy should be used.
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virtual SDValue
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EmitTargetCodeForMemmove(SelectionDAG &DAG, DebugLoc dl,
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SDValue Chain,
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SDValue Op1, SDValue Op2,
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SDValue Op3, unsigned Align, bool isVolatile,
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MachinePointerInfo DstPtrInfo,
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MachinePointerInfo SrcPtrInfo) const {
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return SDValue();
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}
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/// EmitTargetCodeForMemset - Emit target-specific code that performs a
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/// memset. This can be used by targets to provide code sequences for cases
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/// that don't fit the target's parameters for simple stores and can be more
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/// efficient than using a library call. This function can return a null
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/// SDValue if the target declines to use custom code and a different
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/// lowering strategy should be used.
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virtual SDValue
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EmitTargetCodeForMemset(SelectionDAG &DAG, DebugLoc dl,
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SDValue Chain,
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SDValue Op1, SDValue Op2,
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SDValue Op3, unsigned Align, bool isVolatile,
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MachinePointerInfo DstPtrInfo) const {
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return SDValue();
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}
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};
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} // end llvm namespace
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#endif
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