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; }
+ TargetSelectionDAGInfo(const TargetSelectionDAGInfo &) = delete;
+ void operator=(const TargetSelectionDAGInfo &) = delete;
public:
- explicit TargetSelectionDAGInfo(const TargetMachine &TM);
+ explicit TargetSelectionDAGInfo() = default;
virtual ~TargetSelectionDAGInfo();
/// EmitTargetCodeForMemcpy - Emit target-specific code that performs a
/// 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
MachinePointerInfo Op2PtrInfo) const {
return std::make_pair(SDValue(), SDValue());
}
+
+ /// EmitTargetCodeForMemchr - Emit target-specific code that performs a
+ /// memchr, in cases where that is faster than a libcall. The first
+ /// returned SDValue is the result of the memchr and the second is
+ /// the chain. Both SDValues can be null if a normal libcall should
+ /// be used.
+ virtual std::pair<SDValue, SDValue>
+ EmitTargetCodeForMemchr(SelectionDAG &DAG, SDLoc dl, SDValue Chain,
+ SDValue Src, SDValue Char, SDValue Length,
+ MachinePointerInfo SrcPtrInfo) const {
+ return std::make_pair(SDValue(), SDValue());
+ }
+
+ /// EmitTargetCodeForStrcpy - Emit target-specific code that performs a
+ /// strcpy or stpcpy, in cases where that is faster than a libcall.
+ /// The first returned SDValue is the result of the copy (the start
+ /// of the destination string for strcpy, a pointer to the null terminator
+ /// for stpcpy) and the second is the chain. Both SDValues can be null
+ /// if a normal libcall should be used.
+ virtual std::pair<SDValue, SDValue>
+ EmitTargetCodeForStrcpy(SelectionDAG &DAG, SDLoc DL, SDValue Chain,
+ SDValue Dest, SDValue Src,
+ MachinePointerInfo DestPtrInfo,
+ MachinePointerInfo SrcPtrInfo,
+ bool isStpcpy) const {
+ return std::make_pair(SDValue(), SDValue());
+ }
+
+ /// EmitTargetCodeForStrcmp - Emit target-specific code that performs a
+ /// strcmp, in cases where that is faster than a libcall. The first
+ /// returned SDValue is the result of the strcmp and the second is
+ /// the chain. Both SDValues can be null if a normal libcall should
+ /// be used.
+ virtual std::pair<SDValue, SDValue>
+ EmitTargetCodeForStrcmp(SelectionDAG &DAG, SDLoc dl,
+ SDValue Chain,
+ SDValue Op1, SDValue Op2,
+ MachinePointerInfo Op1PtrInfo,
+ MachinePointerInfo Op2PtrInfo) const {
+ return std::make_pair(SDValue(), SDValue());
+ }
+
+ virtual std::pair<SDValue, SDValue>
+ EmitTargetCodeForStrlen(SelectionDAG &DAG, SDLoc DL, SDValue Chain,
+ SDValue Src, MachinePointerInfo SrcPtrInfo) const {
+ return std::make_pair(SDValue(), SDValue());
+ }
+
+ virtual std::pair<SDValue, SDValue>
+ EmitTargetCodeForStrnlen(SelectionDAG &DAG, SDLoc DL, SDValue Chain,
+ SDValue Src, SDValue MaxLength,
+ MachinePointerInfo SrcPtrInfo) const {
+ return std::make_pair(SDValue(), SDValue());
+ }
};
} // end llvm namespace