268 lines
11 KiB
C++
268 lines
11 KiB
C++
//===-- SystemZInstrInfo.h - SystemZ instruction information ----*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file contains the SystemZ implementation of the TargetInstrInfo class.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZINSTRINFO_H
|
|
#define LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZINSTRINFO_H
|
|
|
|
#include "SystemZ.h"
|
|
#include "SystemZRegisterInfo.h"
|
|
#include "llvm/Target/TargetInstrInfo.h"
|
|
|
|
#define GET_INSTRINFO_HEADER
|
|
#include "SystemZGenInstrInfo.inc"
|
|
|
|
namespace llvm {
|
|
|
|
class SystemZTargetMachine;
|
|
|
|
namespace SystemZII {
|
|
enum {
|
|
// See comments in SystemZInstrFormats.td.
|
|
SimpleBDXLoad = (1 << 0),
|
|
SimpleBDXStore = (1 << 1),
|
|
Has20BitOffset = (1 << 2),
|
|
HasIndex = (1 << 3),
|
|
Is128Bit = (1 << 4),
|
|
AccessSizeMask = (31 << 5),
|
|
AccessSizeShift = 5,
|
|
CCValuesMask = (15 << 10),
|
|
CCValuesShift = 10,
|
|
CompareZeroCCMaskMask = (15 << 14),
|
|
CompareZeroCCMaskShift = 14,
|
|
CCMaskFirst = (1 << 18),
|
|
CCMaskLast = (1 << 19),
|
|
IsLogical = (1 << 20)
|
|
};
|
|
static inline unsigned getAccessSize(unsigned int Flags) {
|
|
return (Flags & AccessSizeMask) >> AccessSizeShift;
|
|
}
|
|
static inline unsigned getCCValues(unsigned int Flags) {
|
|
return (Flags & CCValuesMask) >> CCValuesShift;
|
|
}
|
|
static inline unsigned getCompareZeroCCMask(unsigned int Flags) {
|
|
return (Flags & CompareZeroCCMaskMask) >> CompareZeroCCMaskShift;
|
|
}
|
|
|
|
// SystemZ MachineOperand target flags.
|
|
enum {
|
|
// Masks out the bits for the access model.
|
|
MO_SYMBOL_MODIFIER = (3 << 0),
|
|
|
|
// @GOT (aka @GOTENT)
|
|
MO_GOT = (1 << 0),
|
|
|
|
// @INDNTPOFF
|
|
MO_INDNTPOFF = (2 << 0)
|
|
};
|
|
// Classifies a branch.
|
|
enum BranchType {
|
|
// An instruction that branches on the current value of CC.
|
|
BranchNormal,
|
|
|
|
// An instruction that peforms a 32-bit signed comparison and branches
|
|
// on the result.
|
|
BranchC,
|
|
|
|
// An instruction that peforms a 32-bit unsigned comparison and branches
|
|
// on the result.
|
|
BranchCL,
|
|
|
|
// An instruction that peforms a 64-bit signed comparison and branches
|
|
// on the result.
|
|
BranchCG,
|
|
|
|
// An instruction that peforms a 64-bit unsigned comparison and branches
|
|
// on the result.
|
|
BranchCLG,
|
|
|
|
// An instruction that decrements a 32-bit register and branches if
|
|
// the result is nonzero.
|
|
BranchCT,
|
|
|
|
// An instruction that decrements a 64-bit register and branches if
|
|
// the result is nonzero.
|
|
BranchCTG
|
|
};
|
|
// Information about a branch instruction.
|
|
struct Branch {
|
|
// The type of the branch.
|
|
BranchType Type;
|
|
|
|
// CCMASK_<N> is set if CC might be equal to N.
|
|
unsigned CCValid;
|
|
|
|
// CCMASK_<N> is set if the branch should be taken when CC == N.
|
|
unsigned CCMask;
|
|
|
|
// The target of the branch.
|
|
const MachineOperand *Target;
|
|
|
|
Branch(BranchType type, unsigned ccValid, unsigned ccMask,
|
|
const MachineOperand *target)
|
|
: Type(type), CCValid(ccValid), CCMask(ccMask), Target(target) {}
|
|
};
|
|
// Kinds of fused compares in compare-and-* instructions. Together with type
|
|
// of the converted compare, this identifies the compare-and-*
|
|
// instruction.
|
|
enum FusedCompareType {
|
|
// Relative branch - CRJ etc.
|
|
CompareAndBranch,
|
|
|
|
// Indirect branch, used for return - CRBReturn etc.
|
|
CompareAndReturn,
|
|
|
|
// Indirect branch, used for sibcall - CRBCall etc.
|
|
CompareAndSibcall,
|
|
|
|
// Trap
|
|
CompareAndTrap
|
|
};
|
|
} // end namespace SystemZII
|
|
|
|
class SystemZSubtarget;
|
|
class SystemZInstrInfo : public SystemZGenInstrInfo {
|
|
const SystemZRegisterInfo RI;
|
|
SystemZSubtarget &STI;
|
|
|
|
void splitMove(MachineBasicBlock::iterator MI, unsigned NewOpcode) const;
|
|
void splitAdjDynAlloc(MachineBasicBlock::iterator MI) const;
|
|
void expandRIPseudo(MachineInstr &MI, unsigned LowOpcode, unsigned HighOpcode,
|
|
bool ConvertHigh) const;
|
|
void expandRIEPseudo(MachineInstr &MI, unsigned LowOpcode,
|
|
unsigned LowOpcodeK, unsigned HighOpcode) const;
|
|
void expandRXYPseudo(MachineInstr &MI, unsigned LowOpcode,
|
|
unsigned HighOpcode) const;
|
|
void expandZExtPseudo(MachineInstr &MI, unsigned LowOpcode,
|
|
unsigned Size) const;
|
|
void expandLoadStackGuard(MachineInstr *MI) const;
|
|
void emitGRX32Move(MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI,
|
|
const DebugLoc &DL, unsigned DestReg, unsigned SrcReg,
|
|
unsigned LowLowOpcode, unsigned Size, bool KillSrc) const;
|
|
virtual void anchor();
|
|
|
|
public:
|
|
explicit SystemZInstrInfo(SystemZSubtarget &STI);
|
|
|
|
// Override TargetInstrInfo.
|
|
unsigned isLoadFromStackSlot(const MachineInstr &MI,
|
|
int &FrameIndex) const override;
|
|
unsigned isStoreToStackSlot(const MachineInstr &MI,
|
|
int &FrameIndex) const override;
|
|
bool isStackSlotCopy(const MachineInstr &MI, int &DestFrameIndex,
|
|
int &SrcFrameIndex) const override;
|
|
bool analyzeBranch(MachineBasicBlock &MBB, MachineBasicBlock *&TBB,
|
|
MachineBasicBlock *&FBB,
|
|
SmallVectorImpl<MachineOperand> &Cond,
|
|
bool AllowModify) const override;
|
|
unsigned RemoveBranch(MachineBasicBlock &MBB) const override;
|
|
unsigned InsertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB,
|
|
MachineBasicBlock *FBB, ArrayRef<MachineOperand> Cond,
|
|
const DebugLoc &DL) const override;
|
|
bool analyzeCompare(const MachineInstr &MI, unsigned &SrcReg,
|
|
unsigned &SrcReg2, int &Mask, int &Value) const override;
|
|
bool optimizeCompareInstr(MachineInstr &CmpInstr, unsigned SrcReg,
|
|
unsigned SrcReg2, int Mask, int Value,
|
|
const MachineRegisterInfo *MRI) const override;
|
|
bool isPredicable(MachineInstr &MI) const override;
|
|
bool isProfitableToIfCvt(MachineBasicBlock &MBB, unsigned NumCycles,
|
|
unsigned ExtraPredCycles,
|
|
BranchProbability Probability) const override;
|
|
bool isProfitableToIfCvt(MachineBasicBlock &TMBB,
|
|
unsigned NumCyclesT, unsigned ExtraPredCyclesT,
|
|
MachineBasicBlock &FMBB,
|
|
unsigned NumCyclesF, unsigned ExtraPredCyclesF,
|
|
BranchProbability Probability) const override;
|
|
bool isProfitableToDupForIfCvt(MachineBasicBlock &MBB, unsigned NumCycles,
|
|
BranchProbability Probability) const override;
|
|
bool PredicateInstruction(MachineInstr &MI,
|
|
ArrayRef<MachineOperand> Pred) const override;
|
|
void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI,
|
|
const DebugLoc &DL, unsigned DestReg, unsigned SrcReg,
|
|
bool KillSrc) const override;
|
|
void storeRegToStackSlot(MachineBasicBlock &MBB,
|
|
MachineBasicBlock::iterator MBBI,
|
|
unsigned SrcReg, bool isKill, int FrameIndex,
|
|
const TargetRegisterClass *RC,
|
|
const TargetRegisterInfo *TRI) const override;
|
|
void loadRegFromStackSlot(MachineBasicBlock &MBB,
|
|
MachineBasicBlock::iterator MBBI,
|
|
unsigned DestReg, int FrameIdx,
|
|
const TargetRegisterClass *RC,
|
|
const TargetRegisterInfo *TRI) const override;
|
|
MachineInstr *convertToThreeAddress(MachineFunction::iterator &MFI,
|
|
MachineInstr &MI,
|
|
LiveVariables *LV) const override;
|
|
MachineInstr *
|
|
foldMemoryOperandImpl(MachineFunction &MF, MachineInstr &MI,
|
|
ArrayRef<unsigned> Ops,
|
|
MachineBasicBlock::iterator InsertPt, int FrameIndex,
|
|
LiveIntervals *LIS = nullptr) const override;
|
|
MachineInstr *foldMemoryOperandImpl(
|
|
MachineFunction &MF, MachineInstr &MI, ArrayRef<unsigned> Ops,
|
|
MachineBasicBlock::iterator InsertPt, MachineInstr &LoadMI,
|
|
LiveIntervals *LIS = nullptr) const override;
|
|
bool expandPostRAPseudo(MachineInstr &MBBI) const override;
|
|
bool ReverseBranchCondition(SmallVectorImpl<MachineOperand> &Cond) const
|
|
override;
|
|
|
|
// Return the SystemZRegisterInfo, which this class owns.
|
|
const SystemZRegisterInfo &getRegisterInfo() const { return RI; }
|
|
|
|
// Return the size in bytes of MI.
|
|
unsigned getInstSizeInBytes(const MachineInstr &MI) const override;
|
|
|
|
// Return true if MI is a conditional or unconditional branch.
|
|
// When returning true, set Cond to the mask of condition-code
|
|
// values on which the instruction will branch, and set Target
|
|
// to the operand that contains the branch target. This target
|
|
// can be a register or a basic block.
|
|
SystemZII::Branch getBranchInfo(const MachineInstr &MI) const;
|
|
|
|
// Get the load and store opcodes for a given register class.
|
|
void getLoadStoreOpcodes(const TargetRegisterClass *RC,
|
|
unsigned &LoadOpcode, unsigned &StoreOpcode) const;
|
|
|
|
// Opcode is the opcode of an instruction that has an address operand,
|
|
// and the caller wants to perform that instruction's operation on an
|
|
// address that has displacement Offset. Return the opcode of a suitable
|
|
// instruction (which might be Opcode itself) or 0 if no such instruction
|
|
// exists.
|
|
unsigned getOpcodeForOffset(unsigned Opcode, int64_t Offset) const;
|
|
|
|
// If Opcode is a load instruction that has a LOAD AND TEST form,
|
|
// return the opcode for the testing form, otherwise return 0.
|
|
unsigned getLoadAndTest(unsigned Opcode) const;
|
|
|
|
// Return true if ROTATE AND ... SELECTED BITS can be used to select bits
|
|
// Mask of the R2 operand, given that only the low BitSize bits of Mask are
|
|
// significant. Set Start and End to the I3 and I4 operands if so.
|
|
bool isRxSBGMask(uint64_t Mask, unsigned BitSize,
|
|
unsigned &Start, unsigned &End) const;
|
|
|
|
// If Opcode is a COMPARE opcode for which an associated fused COMPARE AND *
|
|
// operation exists, return the opcode for the latter, otherwise return 0.
|
|
// MI, if nonnull, is the compare instruction.
|
|
unsigned getFusedCompare(unsigned Opcode,
|
|
SystemZII::FusedCompareType Type,
|
|
const MachineInstr *MI = nullptr) const;
|
|
|
|
// Emit code before MBBI in MI to move immediate value Value into
|
|
// physical register Reg.
|
|
void loadImmediate(MachineBasicBlock &MBB,
|
|
MachineBasicBlock::iterator MBBI,
|
|
unsigned Reg, uint64_t Value) const;
|
|
};
|
|
} // end namespace llvm
|
|
|
|
#endif
|