llvm-project/llvm/lib/Target/Mips/MipsSEInstrInfo.h

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//===-- MipsSEInstrInfo.h - Mips32/64 Instruction Information ---*- 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 contains the Mips32/64 implementation of the TargetInstrInfo class.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_TARGET_MIPS_MIPSSEINSTRINFO_H
#define LLVM_LIB_TARGET_MIPS_MIPSSEINSTRINFO_H
#include "MipsInstrInfo.h"
#include "MipsSERegisterInfo.h"
namespace llvm {
class MipsSEInstrInfo : public MipsInstrInfo {
const MipsSERegisterInfo RI;
public:
explicit MipsSEInstrInfo(const MipsSubtarget &STI);
const MipsRegisterInfo &getRegisterInfo() const override;
/// isLoadFromStackSlot - If the specified machine instruction is a direct
/// load from a stack slot, return the virtual or physical register number of
/// the destination along with the FrameIndex of the loaded stack slot. If
/// not, return 0. This predicate must return 0 if the instruction has
/// any side effects other than loading from the stack slot.
unsigned isLoadFromStackSlot(const MachineInstr &MI,
int &FrameIndex) const override;
/// isStoreToStackSlot - If the specified machine instruction is a direct
/// store to a stack slot, return the virtual or physical register number of
/// the source reg along with the FrameIndex of the loaded stack slot. If
/// not, return 0. This predicate must return 0 if the instruction has
/// any side effects other than storing to the stack slot.
unsigned isStoreToStackSlot(const MachineInstr &MI,
int &FrameIndex) const override;
void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI,
const DebugLoc &DL, unsigned DestReg, unsigned SrcReg,
bool KillSrc) const override;
void storeRegToStack(MachineBasicBlock &MBB,
MachineBasicBlock::iterator MI,
unsigned SrcReg, bool isKill, int FrameIndex,
const TargetRegisterClass *RC,
const TargetRegisterInfo *TRI,
int64_t Offset) const override;
void loadRegFromStack(MachineBasicBlock &MBB,
MachineBasicBlock::iterator MI,
unsigned DestReg, int FrameIndex,
const TargetRegisterClass *RC,
const TargetRegisterInfo *TRI,
int64_t Offset) const override;
bool expandPostRAPseudo(MachineInstr &MI) const override;
unsigned getOppositeBranchOpc(unsigned Opc) const override;
/// Adjust SP by Amount bytes.
void adjustStackPtr(unsigned SP, int64_t Amount, MachineBasicBlock &MBB,
MachineBasicBlock::iterator I) const override;
/// Emit a series of instructions to load an immediate. If NewImm is a
/// non-NULL parameter, the last instruction is not emitted, but instead
/// its immediate operand is returned in NewImm.
unsigned loadImmediate(int64_t Imm, MachineBasicBlock &MBB,
MachineBasicBlock::iterator II, const DebugLoc &DL,
unsigned *NewImm) const;
protected:
/// If the specific machine instruction is a instruction that moves/copies
/// value from one register to another register return true along with
/// @Source machine operand and @Destination machine operand.
bool isCopyInstrImpl(const MachineInstr &MI, const MachineOperand *&Source,
const MachineOperand *&Destination) const override;
private:
unsigned getAnalyzableBrOpc(unsigned Opc) const override;
[mips][mips64r6] Use JALR for returns instead of JR (which is not available on MIPS32r6/MIPS64r6) Summary: RET, and RET_MM have been replaced by a pseudo named PseudoReturn. In addition a version with a 64-bit GPR named PseudoReturn64 has been added. Instruction selection for a return matches RetRA, which is expanded post register allocation to PseudoReturn/PseudoReturn64. During MipsAsmPrinter, this PseudoReturn/PseudoReturn64 are emitted as: - (JALR64 $zero, $rs) on MIPS64r6 - (JALR $zero, $rs) on MIPS32r6 - (JR_MM $rs) on microMIPS - (JR $rs) otherwise On MIPS32r6/MIPS64r6, 'jr $rs' is an alias for 'jalr $zero, $rs'. To aid development and review (specifically, to ensure all cases of jr are updated), these aliases are temporarily named 'r6.jr' instead of 'jr'. A follow up patch will change them back to the correct mnemonic. Added (JALR $zero, $rs) to MipsNaClELFStreamer's definition of an indirect jump, and removed it from its definition of a call. Note: I haven't accounted for MIPS64 in MipsNaClELFStreamer since it's doesn't appear to account for any MIPS64-specifics. The return instruction created as part of eh_return expansion is now expanded using expandRetRA() so we use the right return instruction on MIPS32r6/MIPS64r6 ('jalr $zero, $rs'). Also, fixed a misuse of isABI_N64() to detect 64-bit wide registers in expandEhReturn(). Reviewers: jkolek, vmedic, mseaborn, zoran.jovanovic, dsanders Reviewed By: dsanders Subscribers: llvm-commits Differential Revision: http://reviews.llvm.org/D4268 llvm-svn: 212604
2014-07-09 18:16:07 +08:00
void expandRetRA(MachineBasicBlock &MBB, MachineBasicBlock::iterator I) const;
void expandERet(MachineBasicBlock &MBB, MachineBasicBlock::iterator I) const;
std::pair<bool, bool> compareOpndSize(unsigned Opc,
const MachineFunction &MF) const;
void expandPseudoMFHiLo(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
unsigned NewOpc) const;
void expandPseudoMTLoHi(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
unsigned LoOpc, unsigned HiOpc,
bool HasExplicitDef) const;
/// Expand pseudo Int-to-FP conversion instructions.
///
/// For example, the following pseudo instruction
/// PseudoCVT_D32_W D2, A5
/// gets expanded into these two instructions:
/// MTC1 F4, A5
/// CVT_D32_W D2, F4
///
/// We do this expansion post-RA to avoid inserting a floating point copy
/// instruction between MTC1 and CVT_D32_W.
void expandCvtFPInt(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
unsigned CvtOpc, unsigned MovOpc, bool IsI64) const;
void expandExtractElementF64(MachineBasicBlock &MBB,
MachineBasicBlock::iterator I, bool isMicroMips,
bool FP64) const;
void expandBuildPairF64(MachineBasicBlock &MBB,
MachineBasicBlock::iterator I, bool isMicroMips,
bool FP64) const;
void expandEhReturn(MachineBasicBlock &MBB,
MachineBasicBlock::iterator I) const;
};
}
#endif