dc520ea4af
1. AIX has "millicode" routines, which are functions loaded at boot time into fixed addresses in kernel memory. This allows them to be customized for the processor. The __strcmp routine is a millicode implementation; we use millicode for the strcmp function instead of a library call to improve performance.
95 lines
3.8 KiB
C++
95 lines
3.8 KiB
C++
//===-- SystemZSelectionDAGInfo.h - SystemZ SelectionDAG Info ---*- C++ -*-===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file defines the SystemZ subclass for SelectionDAGTargetInfo.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZSELECTIONDAGINFO_H
|
|
#define LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZSELECTIONDAGINFO_H
|
|
|
|
#include "llvm/CodeGen/SelectionDAGTargetInfo.h"
|
|
|
|
#define GET_SDNODE_ENUM
|
|
#include "SystemZGenSDNodeInfo.inc"
|
|
|
|
namespace llvm {
|
|
namespace SystemZISD {
|
|
|
|
enum NodeType : unsigned {
|
|
// Set the condition code from a boolean value in operand 0.
|
|
// Operand 1 is a mask of all condition-code values that may result of this
|
|
// operation, operand 2 is a mask of condition-code values that may result
|
|
// if the boolean is true.
|
|
// Note that this operation is always optimized away, we will never
|
|
// generate any code for it.
|
|
GET_CCMASK = GENERATED_OPCODE_END,
|
|
};
|
|
|
|
// Return true if OPCODE is some kind of PC-relative address.
|
|
inline bool isPCREL(unsigned Opcode) {
|
|
return Opcode == PCREL_WRAPPER || Opcode == PCREL_OFFSET;
|
|
}
|
|
|
|
} // namespace SystemZISD
|
|
|
|
class SystemZSelectionDAGInfo : public SelectionDAGGenTargetInfo {
|
|
public:
|
|
SystemZSelectionDAGInfo();
|
|
|
|
const char *getTargetNodeName(unsigned Opcode) const override;
|
|
|
|
SDValue EmitTargetCodeForMemcpy(SelectionDAG &DAG, const SDLoc &DL,
|
|
SDValue Chain, SDValue Dst, SDValue Src,
|
|
SDValue Size, Align Alignment,
|
|
bool IsVolatile, bool AlwaysInline,
|
|
MachinePointerInfo DstPtrInfo,
|
|
MachinePointerInfo SrcPtrInfo) const override;
|
|
|
|
SDValue EmitTargetCodeForMemset(SelectionDAG &DAG, const SDLoc &DL,
|
|
SDValue Chain, SDValue Dst, SDValue Byte,
|
|
SDValue Size, Align Alignment,
|
|
bool IsVolatile, bool AlwaysInline,
|
|
MachinePointerInfo DstPtrInfo) const override;
|
|
|
|
std::pair<SDValue, SDValue>
|
|
EmitTargetCodeForMemcmp(SelectionDAG &DAG, const SDLoc &DL, SDValue Chain,
|
|
SDValue Src1, SDValue Src2, SDValue Size,
|
|
const CallInst *CI) const override;
|
|
|
|
std::pair<SDValue, SDValue>
|
|
EmitTargetCodeForMemchr(SelectionDAG &DAG, const SDLoc &DL, SDValue Chain,
|
|
SDValue Src, SDValue Char, SDValue Length,
|
|
MachinePointerInfo SrcPtrInfo) const override;
|
|
|
|
std::pair<SDValue, SDValue>
|
|
EmitTargetCodeForStrcpy(SelectionDAG &DAG, const SDLoc &DL, SDValue Chain,
|
|
SDValue Dest, SDValue Src,
|
|
MachinePointerInfo DestPtrInfo,
|
|
MachinePointerInfo SrcPtrInfo, bool isStpcpy,
|
|
const CallInst *CI) const override;
|
|
|
|
std::pair<SDValue, SDValue> EmitTargetCodeForStrcmp(
|
|
SelectionDAG &DAG, const SDLoc &DL, SDValue Chain, SDValue Src1,
|
|
SDValue Src2, MachinePointerInfo Op1PtrInfo,
|
|
MachinePointerInfo Op2PtrInfo, const CallInst *CI) const override;
|
|
|
|
std::pair<SDValue, SDValue>
|
|
EmitTargetCodeForStrlen(SelectionDAG &DAG, const SDLoc &DL, SDValue Chain,
|
|
SDValue Src, const CallInst *CI) const override;
|
|
|
|
std::pair<SDValue, SDValue>
|
|
EmitTargetCodeForStrnlen(SelectionDAG &DAG, const SDLoc &DL, SDValue Chain,
|
|
SDValue Src, SDValue MaxLength,
|
|
MachinePointerInfo SrcPtrInfo) const override;
|
|
};
|
|
|
|
} // end namespace llvm
|
|
|
|
#endif
|