-//===- X86InstrInfo.h - X86 Instruction Information ------------*- C++ -*- ===//
+//===-- X86InstrInfo.h - X86 Instruction Information ------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
#ifndef X86INSTRUCTIONINFO_H
#define X86INSTRUCTIONINFO_H
-#include "llvm/Target/TargetInstrInfo.h"
#include "X86.h"
#include "X86RegisterInfo.h"
#include "llvm/ADT/DenseMap.h"
+#include "llvm/Target/TargetInstrInfo.h"
+
+#define GET_INSTRINFO_HEADER
+#include "X86GenInstrInfo.inc"
namespace llvm {
class X86RegisterInfo;
COND_INVALID
};
-
+
// Turn condition code into conditional branch opcode.
unsigned GetCondBranchFromCond(CondCode CC);
-
+
+ // Turn CMov opcode into condition code.
+ CondCode getCondFromCMovOpc(unsigned Opc);
+
/// GetOppositeBranchCondition - Return the inverse of the specified cond,
/// e.g. turning COND_E to COND_NE.
CondCode GetOppositeBranchCondition(X86::CondCode CC);
+} // end namespace X86;
-}
-
-/// X86II - This namespace holds all of the target specific flags that
-/// instruction info tracks.
-///
-namespace X86II {
- /// Target Operand Flag enum.
- enum TOF {
- //===------------------------------------------------------------------===//
- // X86 Specific MachineOperand flags.
-
- MO_NO_FLAG,
-
- /// MO_GOT_ABSOLUTE_ADDRESS - On a symbol operand, this represents a
- /// relocation of:
- /// SYMBOL_LABEL + [. - PICBASELABEL]
- MO_GOT_ABSOLUTE_ADDRESS,
-
- /// MO_PIC_BASE_OFFSET - On a symbol operand this indicates that the
- /// immediate should get the value of the symbol minus the PIC base label:
- /// SYMBOL_LABEL - PICBASELABEL
- MO_PIC_BASE_OFFSET,
-
- /// MO_GOT - On a symbol operand this indicates that the immediate is the
- /// offset to the GOT entry for the symbol name from the base of the GOT.
- ///
- /// See the X86-64 ELF ABI supplement for more details.
- /// SYMBOL_LABEL @GOT
- MO_GOT,
-
- /// MO_GOTOFF - On a symbol operand this indicates that the immediate is
- /// the offset to the location of the symbol name from the base of the GOT.
- ///
- /// See the X86-64 ELF ABI supplement for more details.
- /// SYMBOL_LABEL @GOTOFF
- MO_GOTOFF,
-
- /// MO_GOTPCREL - On a symbol operand this indicates that the immediate is
- /// offset to the GOT entry for the symbol name from the current code
- /// location.
- ///
- /// See the X86-64 ELF ABI supplement for more details.
- /// SYMBOL_LABEL @GOTPCREL
- MO_GOTPCREL,
-
- /// MO_PLT - On a symbol operand this indicates that the immediate is
- /// offset to the PLT entry of symbol name from the current code location.
- ///
- /// See the X86-64 ELF ABI supplement for more details.
- /// SYMBOL_LABEL @PLT
- MO_PLT,
-
- /// MO_TLSGD - On a symbol operand this indicates that the immediate is
- /// some TLS offset.
- ///
- /// See 'ELF Handling for Thread-Local Storage' for more details.
- /// SYMBOL_LABEL @TLSGD
- MO_TLSGD,
-
- /// MO_GOTTPOFF - On a symbol operand this indicates that the immediate is
- /// some TLS offset.
- ///
- /// See 'ELF Handling for Thread-Local Storage' for more details.
- /// SYMBOL_LABEL @GOTTPOFF
- MO_GOTTPOFF,
-
- /// MO_INDNTPOFF - On a symbol operand this indicates that the immediate is
- /// some TLS offset.
- ///
- /// See 'ELF Handling for Thread-Local Storage' for more details.
- /// SYMBOL_LABEL @INDNTPOFF
- MO_INDNTPOFF,
-
- /// MO_TPOFF - On a symbol operand this indicates that the immediate is
- /// some TLS offset.
- ///
- /// See 'ELF Handling for Thread-Local Storage' for more details.
- /// SYMBOL_LABEL @TPOFF
- MO_TPOFF,
-
- /// MO_NTPOFF - On a symbol operand this indicates that the immediate is
- /// some TLS offset.
- ///
- /// See 'ELF Handling for Thread-Local Storage' for more details.
- /// SYMBOL_LABEL @NTPOFF
- MO_NTPOFF,
-
- /// MO_DLLIMPORT - On a symbol operand "FOO", this indicates that the
- /// reference is actually to the "__imp_FOO" symbol. This is used for
- /// dllimport linkage on windows.
- MO_DLLIMPORT,
-
- /// MO_DARWIN_STUB - On a symbol operand "FOO", this indicates that the
- /// reference is actually to the "FOO$stub" symbol. This is used for calls
- /// and jumps to external functions on Tiger and before.
- MO_DARWIN_STUB,
-
- /// MO_DARWIN_NONLAZY - On a symbol operand "FOO", this indicates that the
- /// reference is actually to the "FOO$non_lazy_ptr" symbol, which is a
- /// non-PIC-base-relative reference to a non-hidden dyld lazy pointer stub.
- MO_DARWIN_NONLAZY,
-
- /// MO_DARWIN_NONLAZY_PIC_BASE - On a symbol operand "FOO", this indicates
- /// that the reference is actually to "FOO$non_lazy_ptr - PICBASE", which is
- /// a PIC-base-relative reference to a non-hidden dyld lazy pointer stub.
- MO_DARWIN_NONLAZY_PIC_BASE,
-
- /// MO_DARWIN_HIDDEN_NONLAZY_PIC_BASE - On a symbol operand "FOO", this
- /// indicates that the reference is actually to "FOO$non_lazy_ptr -PICBASE",
- /// which is a PIC-base-relative reference to a hidden dyld lazy pointer
- /// stub.
- MO_DARWIN_HIDDEN_NONLAZY_PIC_BASE,
-
- /// MO_TLVP - On a symbol operand this indicates that the immediate is
- /// some TLS offset.
- ///
- /// This is the TLS offset for the Darwin TLS mechanism.
- MO_TLVP,
-
- /// MO_TLVP_PIC_BASE - On a symbol operand this indicates that the immediate
- /// is some TLS offset from the picbase.
- ///
- /// This is the 32-bit TLS offset for Darwin TLS in PIC mode.
- MO_TLVP_PIC_BASE
- };
-}
/// isGlobalStubReference - Return true if the specified TargetFlag operand is
/// a reference to a stub for a global, not the global itself.
return false;
}
}
-
-/// X86II - This namespace holds all of the target specific flags that
-/// instruction info tracks.
-///
-namespace X86II {
- enum {
- //===------------------------------------------------------------------===//
- // Instruction encodings. These are the standard/most common forms for X86
- // instructions.
- //
-
- // PseudoFrm - This represents an instruction that is a pseudo instruction
- // or one that has not been implemented yet. It is illegal to code generate
- // it, but tolerated for intermediate implementation stages.
- Pseudo = 0,
-
- /// Raw - This form is for instructions that don't have any operands, so
- /// they are just a fixed opcode value, like 'leave'.
- RawFrm = 1,
-
- /// AddRegFrm - This form is used for instructions like 'push r32' that have
- /// their one register operand added to their opcode.
- AddRegFrm = 2,
-
- /// MRMDestReg - This form is used for instructions that use the Mod/RM byte
- /// to specify a destination, which in this case is a register.
- ///
- MRMDestReg = 3,
-
- /// MRMDestMem - This form is used for instructions that use the Mod/RM byte
- /// to specify a destination, which in this case is memory.
- ///
- MRMDestMem = 4,
-
- /// MRMSrcReg - This form is used for instructions that use the Mod/RM byte
- /// to specify a source, which in this case is a register.
- ///
- MRMSrcReg = 5,
-
- /// MRMSrcMem - This form is used for instructions that use the Mod/RM byte
- /// to specify a source, which in this case is memory.
- ///
- MRMSrcMem = 6,
-
- /// MRM[0-7][rm] - These forms are used to represent instructions that use
- /// a Mod/RM byte, and use the middle field to hold extended opcode
- /// information. In the intel manual these are represented as /0, /1, ...
- ///
-
- // First, instructions that operate on a register r/m operand...
- MRM0r = 16, MRM1r = 17, MRM2r = 18, MRM3r = 19, // Format /0 /1 /2 /3
- MRM4r = 20, MRM5r = 21, MRM6r = 22, MRM7r = 23, // Format /4 /5 /6 /7
-
- // Next, instructions that operate on a memory r/m operand...
- MRM0m = 24, MRM1m = 25, MRM2m = 26, MRM3m = 27, // Format /0 /1 /2 /3
- MRM4m = 28, MRM5m = 29, MRM6m = 30, MRM7m = 31, // Format /4 /5 /6 /7
-
- // MRMInitReg - This form is used for instructions whose source and
- // destinations are the same register.
- MRMInitReg = 32,
-
- //// MRM_C1 - A mod/rm byte of exactly 0xC1.
- MRM_C1 = 33,
- MRM_C2 = 34,
- MRM_C3 = 35,
- MRM_C4 = 36,
- MRM_C8 = 37,
- MRM_C9 = 38,
- MRM_E8 = 39,
- MRM_F0 = 40,
- MRM_F8 = 41,
- MRM_F9 = 42,
-
- FormMask = 63,
-
- //===------------------------------------------------------------------===//
- // Actual flags...
-
- // OpSize - Set if this instruction requires an operand size prefix (0x66),
- // which most often indicates that the instruction operates on 16 bit data
- // instead of 32 bit data.
- OpSize = 1 << 6,
-
- // AsSize - Set if this instruction requires an operand size prefix (0x67),
- // which most often indicates that the instruction address 16 bit address
- // instead of 32 bit address (or 32 bit address in 64 bit mode).
- AdSize = 1 << 7,
-
- //===------------------------------------------------------------------===//
- // Op0Mask - There are several prefix bytes that are used to form two byte
- // opcodes. These are currently 0x0F, 0xF3, and 0xD8-0xDF. This mask is
- // used to obtain the setting of this field. If no bits in this field is
- // set, there is no prefix byte for obtaining a multibyte opcode.
- //
- Op0Shift = 8,
- Op0Mask = 0xF << Op0Shift,
-
- // TB - TwoByte - Set if this instruction has a two byte opcode, which
- // starts with a 0x0F byte before the real opcode.
- TB = 1 << Op0Shift,
-
- // REP - The 0xF3 prefix byte indicating repetition of the following
- // instruction.
- REP = 2 << Op0Shift,
-
- // D8-DF - These escape opcodes are used by the floating point unit. These
- // values must remain sequential.
- D8 = 3 << Op0Shift, D9 = 4 << Op0Shift,
- DA = 5 << Op0Shift, DB = 6 << Op0Shift,
- DC = 7 << Op0Shift, DD = 8 << Op0Shift,
- DE = 9 << Op0Shift, DF = 10 << Op0Shift,
-
- // XS, XD - These prefix codes are for single and double precision scalar
- // floating point operations performed in the SSE registers.
- XD = 11 << Op0Shift, XS = 12 << Op0Shift,
-
- // T8, TA - Prefix after the 0x0F prefix.
- T8 = 13 << Op0Shift, TA = 14 << Op0Shift,
-
- // TF - Prefix before and after 0x0F
- TF = 15 << Op0Shift,
-
- //===------------------------------------------------------------------===//
- // REX_W - REX prefixes are instruction prefixes used in 64-bit mode.
- // They are used to specify GPRs and SSE registers, 64-bit operand size,
- // etc. We only cares about REX.W and REX.R bits and only the former is
- // statically determined.
- //
- REXShift = 12,
- REX_W = 1 << REXShift,
-
- //===------------------------------------------------------------------===//
- // This three-bit field describes the size of an immediate operand. Zero is
- // unused so that we can tell if we forgot to set a value.
- ImmShift = 13,
- ImmMask = 7 << ImmShift,
- Imm8 = 1 << ImmShift,
- Imm8PCRel = 2 << ImmShift,
- Imm16 = 3 << ImmShift,
- Imm16PCRel = 4 << ImmShift,
- Imm32 = 5 << ImmShift,
- Imm32PCRel = 6 << ImmShift,
- Imm64 = 7 << ImmShift,
-
- //===------------------------------------------------------------------===//
- // FP Instruction Classification... Zero is non-fp instruction.
-
- // FPTypeMask - Mask for all of the FP types...
- FPTypeShift = 16,
- FPTypeMask = 7 << FPTypeShift,
-
- // NotFP - The default, set for instructions that do not use FP registers.
- NotFP = 0 << FPTypeShift,
-
- // ZeroArgFP - 0 arg FP instruction which implicitly pushes ST(0), f.e. fld0
- ZeroArgFP = 1 << FPTypeShift,
-
- // OneArgFP - 1 arg FP instructions which implicitly read ST(0), such as fst
- OneArgFP = 2 << FPTypeShift,
-
- // OneArgFPRW - 1 arg FP instruction which implicitly read ST(0) and write a
- // result back to ST(0). For example, fcos, fsqrt, etc.
- //
- OneArgFPRW = 3 << FPTypeShift,
-
- // TwoArgFP - 2 arg FP instructions which implicitly read ST(0), and an
- // explicit argument, storing the result to either ST(0) or the implicit
- // argument. For example: fadd, fsub, fmul, etc...
- TwoArgFP = 4 << FPTypeShift,
-
- // CompareFP - 2 arg FP instructions which implicitly read ST(0) and an
- // explicit argument, but have no destination. Example: fucom, fucomi, ...
- CompareFP = 5 << FPTypeShift,
-
- // CondMovFP - "2 operand" floating point conditional move instructions.
- CondMovFP = 6 << FPTypeShift,
-
- // SpecialFP - Special instruction forms. Dispatch by opcode explicitly.
- SpecialFP = 7 << FPTypeShift,
-
- // Lock prefix
- LOCKShift = 19,
- LOCK = 1 << LOCKShift,
-
- // Segment override prefixes. Currently we just need ability to address
- // stuff in gs and fs segments.
- SegOvrShift = 20,
- SegOvrMask = 3 << SegOvrShift,
- FS = 1 << SegOvrShift,
- GS = 2 << SegOvrShift,
-
- // Execution domain for SSE instructions in bits 22, 23.
- // 0 in bits 22-23 means normal, non-SSE instruction.
- SSEDomainShift = 22,
-
- OpcodeShift = 24,
- OpcodeMask = 0xFF << OpcodeShift
-
- };
-
- // FIXME: The enum opcode space is over and more bits are needed. Anywhere
- // those enums below are used, TSFlags must be shifted right by 32 first.
- enum {
- //===------------------------------------------------------------------===//
- // VEX - A prefix used by AVX instructions
- VEX = 1,
-
- // VEX_W is has a opcode specific functionality, but is used in the same
- // way as REX_W is for regular SSE instructions.
- VEX_W = 1 << 1,
-
- // VEX_4V is used to specify an additional AVX/SSE register. Several 2
- // address instructions in SSE are represented as 3 address ones in AVX
- // and the additional register is encoded in VEX_VVVV prefix.
- VEX_4V = 1 << 2,
-
- // VEX_I8IMM specifies that the last register used in a AVX instruction,
- // must be encoded in the i8 immediate field. This usually happens in
- // instructions with 4 operands.
- VEX_I8IMM = 1 << 3
- };
-
- // getBaseOpcodeFor - This function returns the "base" X86 opcode for the
- // specified machine instruction.
- //
- static inline unsigned char getBaseOpcodeFor(uint64_t TSFlags) {
- return TSFlags >> X86II::OpcodeShift;
- }
-
- static inline bool hasImm(uint64_t TSFlags) {
- return (TSFlags & X86II::ImmMask) != 0;
- }
-
- /// getSizeOfImm - Decode the "size of immediate" field from the TSFlags field
- /// of the specified instruction.
- static inline unsigned getSizeOfImm(uint64_t TSFlags) {
- switch (TSFlags & X86II::ImmMask) {
- default: assert(0 && "Unknown immediate size");
- case X86II::Imm8:
- case X86II::Imm8PCRel: return 1;
- case X86II::Imm16:
- case X86II::Imm16PCRel: return 2;
- case X86II::Imm32:
- case X86II::Imm32PCRel: return 4;
- case X86II::Imm64: return 8;
- }
- }
-
- /// isImmPCRel - Return true if the immediate of the specified instruction's
- /// TSFlags indicates that it is pc relative.
- static inline unsigned isImmPCRel(uint64_t TSFlags) {
- switch (TSFlags & X86II::ImmMask) {
- default: assert(0 && "Unknown immediate size");
- case X86II::Imm8PCRel:
- case X86II::Imm16PCRel:
- case X86II::Imm32PCRel:
- return true;
- case X86II::Imm8:
- case X86II::Imm16:
- case X86II::Imm32:
- case X86II::Imm64:
- return false;
- }
- }
-}
-
-const int X86AddrNumOperands = 5;
inline static bool isScale(const MachineOperand &MO) {
return MO.isImm() &&
isLeaMem(MI, Op);
}
-class X86InstrInfo : public TargetInstrInfoImpl {
+class X86InstrInfo : public X86GenInstrInfo {
X86TargetMachine &TM;
const X86RegisterInfo RI;
-
- /// RegOp2MemOpTable2Addr, RegOp2MemOpTable0, RegOp2MemOpTable1,
- /// RegOp2MemOpTable2 - Load / store folding opcode maps.
+
+ /// RegOp2MemOpTable3Addr, RegOp2MemOpTable0, RegOp2MemOpTable1,
+ /// RegOp2MemOpTable2, RegOp2MemOpTable3 - Load / store folding opcode maps.
///
- DenseMap<unsigned*, std::pair<unsigned,unsigned> > RegOp2MemOpTable2Addr;
- DenseMap<unsigned*, std::pair<unsigned,unsigned> > RegOp2MemOpTable0;
- DenseMap<unsigned*, std::pair<unsigned,unsigned> > RegOp2MemOpTable1;
- DenseMap<unsigned*, std::pair<unsigned,unsigned> > RegOp2MemOpTable2;
-
+ typedef DenseMap<unsigned,
+ std::pair<unsigned, unsigned> > RegOp2MemOpTableType;
+ RegOp2MemOpTableType RegOp2MemOpTable2Addr;
+ RegOp2MemOpTableType RegOp2MemOpTable0;
+ RegOp2MemOpTableType RegOp2MemOpTable1;
+ RegOp2MemOpTableType RegOp2MemOpTable2;
+ RegOp2MemOpTableType RegOp2MemOpTable3;
+
/// MemOp2RegOpTable - Load / store unfolding opcode map.
///
- DenseMap<unsigned*, std::pair<unsigned, unsigned> > MemOp2RegOpTable;
+ typedef DenseMap<unsigned,
+ std::pair<unsigned, unsigned> > MemOp2RegOpTableType;
+ MemOp2RegOpTableType MemOp2RegOpTable;
+
+ static void AddTableEntry(RegOp2MemOpTableType &R2MTable,
+ MemOp2RegOpTableType &M2RTable,
+ unsigned RegOp, unsigned MemOp, unsigned Flags);
public:
explicit X86InstrInfo(X86TargetMachine &tm);
///
virtual const X86RegisterInfo &getRegisterInfo() const { return RI; }
- /// Return true if the instruction is a register to register move and return
- /// the source and dest operands and their sub-register indices by reference.
- virtual bool isMoveInstr(const MachineInstr &MI,
- unsigned &SrcReg, unsigned &DstReg,
- unsigned &SrcSubIdx, unsigned &DstSubIdx) const;
-
/// isCoalescableExtInstr - Return true if the instruction is a "coalescable"
/// extension instruction. That is, it's like a copy where it's legal for the
/// source to overlap the destination. e.g. X86::MOVSX64rr32. If this returns
unsigned isLoadFromStackSlotPostFE(const MachineInstr *MI,
int &FrameIndex) const;
- /// hasLoadFromStackSlot - If the specified machine instruction has
- /// a load from a stack slot, return true along with the FrameIndex
- /// of the loaded stack slot and the machine mem operand containing
- /// the reference. If not, return false. Unlike
- /// isLoadFromStackSlot, this returns true for any instructions that
- /// loads from the stack. This is a hint only and may not catch all
- /// cases.
- bool hasLoadFromStackSlot(const MachineInstr *MI,
- const MachineMemOperand *&MMO,
- int &FrameIndex) const;
-
unsigned isStoreToStackSlot(const MachineInstr *MI, int &FrameIndex) const;
/// isStoreToStackSlotPostFE - Check for post-frame ptr elimination
/// stack locations as well. This uses a heuristic so it isn't
unsigned isStoreToStackSlotPostFE(const MachineInstr *MI,
int &FrameIndex) const;
- /// hasStoreToStackSlot - If the specified machine instruction has a
- /// store to a stack slot, return true along with the FrameIndex of
- /// the loaded stack slot and the machine mem operand containing the
- /// reference. If not, return false. Unlike isStoreToStackSlot,
- /// this returns true for any instructions that loads from the
- /// stack. This is a hint only and may not catch all cases.
- bool hasStoreToStackSlot(const MachineInstr *MI,
- const MachineMemOperand *&MMO,
- int &FrameIndex) const;
-
bool isReallyTriviallyReMaterializable(const MachineInstr *MI,
AliasAnalysis *AA) const;
void reMaterialize(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI,
const MachineInstr *Orig,
const TargetRegisterInfo &TRI) const;
+ /// Given an operand within a MachineInstr, insert preceding code to put it
+ /// into the right format for a particular kind of LEA instruction. This may
+ /// involve using an appropriate super-register instead (with an implicit use
+ /// of the original) or creating a new virtual register and inserting COPY
+ /// instructions to get the data into the right class.
+ ///
+ /// Reference parameters are set to indicate how caller should add this
+ /// operand to the LEA instruction.
+ bool classifyLEAReg(MachineInstr *MI, const MachineOperand &Src,
+ unsigned LEAOpcode, bool AllowSP,
+ unsigned &NewSrc, bool &isKill,
+ bool &isUndef, MachineOperand &ImplicitOp) const;
+
/// convertToThreeAddress - This method must be implemented by targets that
/// set the M_CONVERTIBLE_TO_3_ADDR flag. When this flag is set, the target
/// may be able to convert a two-address instruction into a true
MachineBasicBlock *FBB,
const SmallVectorImpl<MachineOperand> &Cond,
DebugLoc DL) const;
- virtual bool copyRegToReg(MachineBasicBlock &MBB,
- MachineBasicBlock::iterator MI,
- unsigned DestReg, unsigned SrcReg,
- const TargetRegisterClass *DestRC,
- const TargetRegisterClass *SrcRC,
- DebugLoc DL) const;
+ virtual bool canInsertSelect(const MachineBasicBlock&,
+ const SmallVectorImpl<MachineOperand> &Cond,
+ unsigned, unsigned, int&, int&, int&) const;
+ virtual void insertSelect(MachineBasicBlock &MBB,
+ MachineBasicBlock::iterator MI, DebugLoc DL,
+ unsigned DstReg,
+ const SmallVectorImpl<MachineOperand> &Cond,
+ unsigned TrueReg, unsigned FalseReg) const;
virtual void copyPhysReg(MachineBasicBlock &MBB,
MachineBasicBlock::iterator MI, DebugLoc DL,
unsigned DestReg, unsigned SrcReg,
MachineInstr::mmo_iterator MMOBegin,
MachineInstr::mmo_iterator MMOEnd,
SmallVectorImpl<MachineInstr*> &NewMIs) const;
-
- virtual bool spillCalleeSavedRegisters(MachineBasicBlock &MBB,
- MachineBasicBlock::iterator MI,
- const std::vector<CalleeSavedInfo> &CSI,
- const TargetRegisterInfo *TRI) const;
-
- virtual bool restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
- MachineBasicBlock::iterator MI,
- const std::vector<CalleeSavedInfo> &CSI,
- const TargetRegisterInfo *TRI) const;
-
- virtual
- MachineInstr *emitFrameIndexDebugValue(MachineFunction &MF,
- int FrameIx, uint64_t Offset,
- const MDNode *MDPtr,
- DebugLoc DL) const;
+
+ virtual bool expandPostRAPseudo(MachineBasicBlock::iterator MI) const;
/// foldMemoryOperand - If this target supports it, fold a load or store of
/// the specified stack slot into the specified machine instruction for the
virtual unsigned getOpcodeAfterMemoryUnfold(unsigned Opc,
bool UnfoldLoad, bool UnfoldStore,
unsigned *LoadRegIndex = 0) const;
-
+
/// areLoadsFromSameBasePtr - This is used by the pre-regalloc scheduler
/// to determine if two loads are loading from the same base address. It
/// should only return true if the base pointers are the same and the
int64_t &Offset1, int64_t &Offset2) const;
/// shouldScheduleLoadsNear - This is a used by the pre-regalloc scheduler to
- /// determine (in conjuction with areLoadsFromSameBasePtr) if two loads should
+ /// determine (in conjunction with areLoadsFromSameBasePtr) if two loads should
/// be scheduled togther. On some targets if two loads are loading from
/// addresses in the same cache line, it's better if they are scheduled
/// together. This function takes two integers that represent the load offsets
int64_t Offset1, int64_t Offset2,
unsigned NumLoads) const;
+ virtual bool shouldScheduleAdjacent(MachineInstr* First,
+ MachineInstr *Second) const LLVM_OVERRIDE;
+
virtual void getNoopForMachoTarget(MCInst &NopInst) const;
virtual
/// instruction that defines the specified register class.
bool isSafeToMoveRegClassDefs(const TargetRegisterClass *RC) const;
- static bool isX86_64NonExtLowByteReg(unsigned reg) {
- return (reg == X86::SPL || reg == X86::BPL ||
- reg == X86::SIL || reg == X86::DIL);
- }
-
static bool isX86_64ExtendedReg(const MachineOperand &MO) {
if (!MO.isReg()) return false;
- return isX86_64ExtendedReg(MO.getReg());
+ return X86II::isX86_64ExtendedReg(MO.getReg());
}
- static unsigned determineREX(const MachineInstr &MI);
-
- /// isX86_64ExtendedReg - Is the MachineOperand a x86-64 extended (r8 or
- /// higher) register? e.g. r8, xmm8, xmm13, etc.
- static bool isX86_64ExtendedReg(unsigned RegNo);
-
- /// GetInstSize - Returns the size of the specified MachineInstr.
- ///
- virtual unsigned GetInstSizeInBytes(const MachineInstr *MI) const;
/// getGlobalBaseReg - Return a virtual register initialized with the
/// the global base register value. Output instructions required to
///
unsigned getGlobalBaseReg(MachineFunction *MF) const;
- /// GetSSEDomain - Return the SSE execution domain of MI as the first element,
- /// and a bitmask of possible arguments to SetSSEDomain ase the second.
- std::pair<uint16_t, uint16_t> GetSSEDomain(const MachineInstr *MI) const;
+ std::pair<uint16_t, uint16_t>
+ getExecutionDomain(const MachineInstr *MI) const;
+
+ void setExecutionDomain(MachineInstr *MI, unsigned Domain) const;
- /// SetSSEDomain - Set the SSEDomain of MI.
- void SetSSEDomain(MachineInstr *MI, unsigned Domain) const;
+ unsigned getPartialRegUpdateClearance(const MachineInstr *MI, unsigned OpNum,
+ const TargetRegisterInfo *TRI) const;
+ unsigned getUndefRegClearance(const MachineInstr *MI, unsigned &OpNum,
+ const TargetRegisterInfo *TRI) const;
+ void breakPartialRegDependency(MachineBasicBlock::iterator MI, unsigned OpNum,
+ const TargetRegisterInfo *TRI) const;
+
+ MachineInstr* foldMemoryOperandImpl(MachineFunction &MF,
+ MachineInstr* MI,
+ unsigned OpNum,
+ const SmallVectorImpl<MachineOperand> &MOs,
+ unsigned Size, unsigned Alignment) const;
+
+ bool isHighLatencyDef(int opc) const;
+
+ bool hasHighOperandLatency(const InstrItineraryData *ItinData,
+ const MachineRegisterInfo *MRI,
+ const MachineInstr *DefMI, unsigned DefIdx,
+ const MachineInstr *UseMI, unsigned UseIdx) const;
+
+ /// analyzeCompare - For a comparison instruction, return the source registers
+ /// in SrcReg and SrcReg2 if having two register operands, and the value it
+ /// compares against in CmpValue. Return true if the comparison instruction
+ /// can be analyzed.
+ virtual bool analyzeCompare(const MachineInstr *MI, unsigned &SrcReg,
+ unsigned &SrcReg2,
+ int &CmpMask, int &CmpValue) const;
+
+ /// optimizeCompareInstr - Check if there exists an earlier instruction that
+ /// operates on the same source operands and sets flags in the same way as
+ /// Compare; remove Compare if possible.
+ virtual bool optimizeCompareInstr(MachineInstr *CmpInstr, unsigned SrcReg,
+ unsigned SrcReg2, int CmpMask, int CmpValue,
+ const MachineRegisterInfo *MRI) const;
+
+ /// optimizeLoadInstr - Try to remove the load by folding it to a register
+ /// operand at the use. We fold the load instructions if and only if the
+ /// def and use are in the same BB. We only look at one load and see
+ /// whether it can be folded into MI. FoldAsLoadDefReg is the virtual register
+ /// defined by the load we are trying to fold. DefMI returns the machine
+ /// instruction that defines FoldAsLoadDefReg, and the function returns
+ /// the machine instruction generated due to folding.
+ virtual MachineInstr* optimizeLoadInstr(MachineInstr *MI,
+ const MachineRegisterInfo *MRI,
+ unsigned &FoldAsLoadDefReg,
+ MachineInstr *&DefMI) const;
private:
MachineInstr * convertToThreeAddressWithLEA(unsigned MIOpc,
MachineBasicBlock::iterator &MBBI,
LiveVariables *LV) const;
- MachineInstr* foldMemoryOperandImpl(MachineFunction &MF,
- MachineInstr* MI,
- unsigned OpNum,
- const SmallVectorImpl<MachineOperand> &MOs,
- unsigned Size, unsigned Alignment) const;
-
/// isFrameOperand - Return true and the FrameIndex if the specified
/// operand and follow operands form a reference to the stack frame.
bool isFrameOperand(const MachineInstr *MI, unsigned int Op,
projects / oota-llvm.git / blobdiff