| //===-- PPCISelLowering.h - PPC32 DAG Lowering Interface --------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file defines the interfaces that PPC uses to lower LLVM code into a |
| // selection DAG. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_LIB_TARGET_POWERPC_PPCISELLOWERING_H |
| #define LLVM_LIB_TARGET_POWERPC_PPCISELLOWERING_H |
| |
| #include "PPC.h" |
| #include "PPCInstrInfo.h" |
| #include "PPCRegisterInfo.h" |
| #include "llvm/CodeGen/CallingConvLower.h" |
| #include "llvm/CodeGen/SelectionDAG.h" |
| #include "llvm/Target/TargetLowering.h" |
| |
| namespace llvm { |
| namespace PPCISD { |
| enum NodeType { |
| // Start the numbering where the builtin ops and target ops leave off. |
| FIRST_NUMBER = ISD::BUILTIN_OP_END, |
| |
| /// FSEL - Traditional three-operand fsel node. |
| /// |
| FSEL, |
| |
| /// FCFID - The FCFID instruction, taking an f64 operand and producing |
| /// and f64 value containing the FP representation of the integer that |
| /// was temporarily in the f64 operand. |
| FCFID, |
| |
| /// Newer FCFID[US] integer-to-floating-point conversion instructions for |
| /// unsigned integers and single-precision outputs. |
| FCFIDU, FCFIDS, FCFIDUS, |
| |
| /// FCTI[D,W]Z - The FCTIDZ and FCTIWZ instructions, taking an f32 or f64 |
| /// operand, producing an f64 value containing the integer representation |
| /// of that FP value. |
| FCTIDZ, FCTIWZ, |
| |
| /// Newer FCTI[D,W]UZ floating-point-to-integer conversion instructions for |
| /// unsigned integers. |
| FCTIDUZ, FCTIWUZ, |
| |
| /// Reciprocal estimate instructions (unary FP ops). |
| FRE, FRSQRTE, |
| |
| // VMADDFP, VNMSUBFP - The VMADDFP and VNMSUBFP instructions, taking |
| // three v4f32 operands and producing a v4f32 result. |
| VMADDFP, VNMSUBFP, |
| |
| /// VPERM - The PPC VPERM Instruction. |
| /// |
| VPERM, |
| |
| /// The CMPB instruction (takes two operands of i32 or i64). |
| CMPB, |
| |
| /// Hi/Lo - These represent the high and low 16-bit parts of a global |
| /// address respectively. These nodes have two operands, the first of |
| /// which must be a TargetGlobalAddress, and the second of which must be a |
| /// Constant. Selected naively, these turn into 'lis G+C' and 'li G+C', |
| /// though these are usually folded into other nodes. |
| Hi, Lo, |
| |
| TOC_ENTRY, |
| |
| /// The following two target-specific nodes are used for calls through |
| /// function pointers in the 64-bit SVR4 ABI. |
| |
| /// Like a regular LOAD but additionally taking/producing a flag. |
| LOAD, |
| |
| /// Like LOAD (taking/producing a flag), but using r2 as hard-coded |
| /// destination. |
| LOAD_TOC, |
| |
| /// OPRC, CHAIN = DYNALLOC(CHAIN, NEGSIZE, FRAME_INDEX) |
| /// This instruction is lowered in PPCRegisterInfo::eliminateFrameIndex to |
| /// compute an allocation on the stack. |
| DYNALLOC, |
| |
| /// GlobalBaseReg - On Darwin, this node represents the result of the mflr |
| /// at function entry, used for PIC code. |
| GlobalBaseReg, |
| |
| /// These nodes represent the 32-bit PPC shifts that operate on 6-bit |
| /// shift amounts. These nodes are generated by the multi-precision shift |
| /// code. |
| SRL, SRA, SHL, |
| |
| /// The combination of sra[wd]i and addze used to implemented signed |
| /// integer division by a power of 2. The first operand is the dividend, |
| /// and the second is the constant shift amount (representing the |
| /// divisor). |
| SRA_ADDZE, |
| |
| /// CALL - A direct function call. |
| /// CALL_NOP is a call with the special NOP which follows 64-bit |
| /// SVR4 calls. |
| CALL, CALL_NOP, |
| |
| /// CALL_TLS and CALL_NOP_TLS - Versions of CALL and CALL_NOP used |
| /// to access TLS variables. |
| CALL_TLS, CALL_NOP_TLS, |
| |
| /// CHAIN,FLAG = MTCTR(VAL, CHAIN[, INFLAG]) - Directly corresponds to a |
| /// MTCTR instruction. |
| MTCTR, |
| |
| /// CHAIN,FLAG = BCTRL(CHAIN, INFLAG) - Directly corresponds to a |
| /// BCTRL instruction. |
| BCTRL, |
| |
| /// CHAIN,FLAG = BCTRL(CHAIN, ADDR, INFLAG) - The combination of a bctrl |
| /// instruction and the TOC reload required on SVR4 PPC64. |
| BCTRL_LOAD_TOC, |
| |
| /// Return with a flag operand, matched by 'blr' |
| RET_FLAG, |
| |
| /// R32 = MFOCRF(CRREG, INFLAG) - Represents the MFOCRF instruction. |
| /// This copies the bits corresponding to the specified CRREG into the |
| /// resultant GPR. Bits corresponding to other CR regs are undefined. |
| MFOCRF, |
| |
| // FIXME: Remove these once the ANDI glue bug is fixed: |
| /// i1 = ANDIo_1_[EQ|GT]_BIT(i32 or i64 x) - Represents the result of the |
| /// eq or gt bit of CR0 after executing andi. x, 1. This is used to |
| /// implement truncation of i32 or i64 to i1. |
| ANDIo_1_EQ_BIT, ANDIo_1_GT_BIT, |
| |
| // READ_TIME_BASE - A read of the 64-bit time-base register on a 32-bit |
| // target (returns (Lo, Hi)). It takes a chain operand. |
| READ_TIME_BASE, |
| |
| // EH_SJLJ_SETJMP - SjLj exception handling setjmp. |
| EH_SJLJ_SETJMP, |
| |
| // EH_SJLJ_LONGJMP - SjLj exception handling longjmp. |
| EH_SJLJ_LONGJMP, |
| |
| /// RESVEC = VCMP(LHS, RHS, OPC) - Represents one of the altivec VCMP* |
| /// instructions. For lack of better number, we use the opcode number |
| /// encoding for the OPC field to identify the compare. For example, 838 |
| /// is VCMPGTSH. |
| VCMP, |
| |
| /// RESVEC, OUTFLAG = VCMPo(LHS, RHS, OPC) - Represents one of the |
| /// altivec VCMP*o instructions. For lack of better number, we use the |
| /// opcode number encoding for the OPC field to identify the compare. For |
| /// example, 838 is VCMPGTSH. |
| VCMPo, |
| |
| /// CHAIN = COND_BRANCH CHAIN, CRRC, OPC, DESTBB [, INFLAG] - This |
| /// corresponds to the COND_BRANCH pseudo instruction. CRRC is the |
| /// condition register to branch on, OPC is the branch opcode to use (e.g. |
| /// PPC::BLE), DESTBB is the destination block to branch to, and INFLAG is |
| /// an optional input flag argument. |
| COND_BRANCH, |
| |
| /// CHAIN = BDNZ CHAIN, DESTBB - These are used to create counter-based |
| /// loops. |
| BDNZ, BDZ, |
| |
| /// F8RC = FADDRTZ F8RC, F8RC - This is an FADD done with rounding |
| /// towards zero. Used only as part of the long double-to-int |
| /// conversion sequence. |
| FADDRTZ, |
| |
| /// F8RC = MFFS - This moves the FPSCR (not modeled) into the register. |
| MFFS, |
| |
| /// LARX = This corresponds to PPC l{w|d}arx instrcution: load and |
| /// reserve indexed. This is used to implement atomic operations. |
| LARX, |
| |
| /// STCX = This corresponds to PPC stcx. instrcution: store conditional |
| /// indexed. This is used to implement atomic operations. |
| STCX, |
| |
| /// TC_RETURN - A tail call return. |
| /// operand #0 chain |
| /// operand #1 callee (register or absolute) |
| /// operand #2 stack adjustment |
| /// operand #3 optional in flag |
| TC_RETURN, |
| |
| /// ch, gl = CR6[UN]SET ch, inglue - Toggle CR bit 6 for SVR4 vararg calls |
| CR6SET, |
| CR6UNSET, |
| |
| /// GPRC = address of _GLOBAL_OFFSET_TABLE_. Used by initial-exec TLS |
| /// on PPC32. |
| PPC32_GOT, |
| |
| /// GPRC = address of _GLOBAL_OFFSET_TABLE_. Used by general dynamic and |
| /// local dynamic TLS on PPC32. |
| PPC32_PICGOT, |
| |
| /// G8RC = ADDIS_GOT_TPREL_HA %X2, Symbol - Used by the initial-exec |
| /// TLS model, produces an ADDIS8 instruction that adds the GOT |
| /// base to sym\@got\@tprel\@ha. |
| ADDIS_GOT_TPREL_HA, |
| |
| /// G8RC = LD_GOT_TPREL_L Symbol, G8RReg - Used by the initial-exec |
| /// TLS model, produces a LD instruction with base register G8RReg |
| /// and offset sym\@got\@tprel\@l. This completes the addition that |
| /// finds the offset of "sym" relative to the thread pointer. |
| LD_GOT_TPREL_L, |
| |
| /// G8RC = ADD_TLS G8RReg, Symbol - Used by the initial-exec TLS |
| /// model, produces an ADD instruction that adds the contents of |
| /// G8RReg to the thread pointer. Symbol contains a relocation |
| /// sym\@tls which is to be replaced by the thread pointer and |
| /// identifies to the linker that the instruction is part of a |
| /// TLS sequence. |
| ADD_TLS, |
| |
| /// G8RC = ADDIS_TLSGD_HA %X2, Symbol - For the general-dynamic TLS |
| /// model, produces an ADDIS8 instruction that adds the GOT base |
| /// register to sym\@got\@tlsgd\@ha. |
| ADDIS_TLSGD_HA, |
| |
| /// G8RC = ADDI_TLSGD_L G8RReg, Symbol - For the general-dynamic TLS |
| /// model, produces an ADDI8 instruction that adds G8RReg to |
| /// sym\@got\@tlsgd\@l. |
| ADDI_TLSGD_L, |
| |
| /// G8RC = ADDIS_TLSLD_HA %X2, Symbol - For the local-dynamic TLS |
| /// model, produces an ADDIS8 instruction that adds the GOT base |
| /// register to sym\@got\@tlsld\@ha. |
| ADDIS_TLSLD_HA, |
| |
| /// G8RC = ADDI_TLSLD_L G8RReg, Symbol - For the local-dynamic TLS |
| /// model, produces an ADDI8 instruction that adds G8RReg to |
| /// sym\@got\@tlsld\@l. |
| ADDI_TLSLD_L, |
| |
| /// G8RC = ADDIS_DTPREL_HA %X3, Symbol, Chain - For the |
| /// local-dynamic TLS model, produces an ADDIS8 instruction |
| /// that adds X3 to sym\@dtprel\@ha. The Chain operand is needed |
| /// to tie this in place following a copy to %X3 from the result |
| /// of a GET_TLSLD_ADDR. |
| ADDIS_DTPREL_HA, |
| |
| /// G8RC = ADDI_DTPREL_L G8RReg, Symbol - For the local-dynamic TLS |
| /// model, produces an ADDI8 instruction that adds G8RReg to |
| /// sym\@got\@dtprel\@l. |
| ADDI_DTPREL_L, |
| |
| /// VRRC = VADD_SPLAT Elt, EltSize - Temporary node to be expanded |
| /// during instruction selection to optimize a BUILD_VECTOR into |
| /// operations on splats. This is necessary to avoid losing these |
| /// optimizations due to constant folding. |
| VADD_SPLAT, |
| |
| /// CHAIN = SC CHAIN, Imm128 - System call. The 7-bit unsigned |
| /// operand identifies the operating system entry point. |
| SC, |
| |
| /// VSRC, CHAIN = XXSWAPD CHAIN, VSRC - Occurs only for little |
| /// endian. Maps to an xxswapd instruction that corrects an lxvd2x |
| /// or stxvd2x instruction. The chain is necessary because the |
| /// sequence replaces a load and needs to provide the same number |
| /// of outputs. |
| XXSWAPD, |
| |
| /// CHAIN = STBRX CHAIN, GPRC, Ptr, Type - This is a |
| /// byte-swapping store instruction. It byte-swaps the low "Type" bits of |
| /// the GPRC input, then stores it through Ptr. Type can be either i16 or |
| /// i32. |
| STBRX = ISD::FIRST_TARGET_MEMORY_OPCODE, |
| |
| /// GPRC, CHAIN = LBRX CHAIN, Ptr, Type - This is a |
| /// byte-swapping load instruction. It loads "Type" bits, byte swaps it, |
| /// then puts it in the bottom bits of the GPRC. TYPE can be either i16 |
| /// or i32. |
| LBRX, |
| |
| /// STFIWX - The STFIWX instruction. The first operand is an input token |
| /// chain, then an f64 value to store, then an address to store it to. |
| STFIWX, |
| |
| /// GPRC, CHAIN = LFIWAX CHAIN, Ptr - This is a floating-point |
| /// load which sign-extends from a 32-bit integer value into the |
| /// destination 64-bit register. |
| LFIWAX, |
| |
| /// GPRC, CHAIN = LFIWZX CHAIN, Ptr - This is a floating-point |
| /// load which zero-extends from a 32-bit integer value into the |
| /// destination 64-bit register. |
| LFIWZX, |
| |
| /// G8RC = ADDIS_TOC_HA %X2, Symbol - For medium and large code model, |
| /// produces an ADDIS8 instruction that adds the TOC base register to |
| /// sym\@toc\@ha. |
| ADDIS_TOC_HA, |
| |
| /// G8RC = LD_TOC_L Symbol, G8RReg - For medium and large code model, |
| /// produces a LD instruction with base register G8RReg and offset |
| /// sym\@toc\@l. Preceded by an ADDIS_TOC_HA to form a full 32-bit offset. |
| LD_TOC_L, |
| |
| /// G8RC = ADDI_TOC_L G8RReg, Symbol - For medium code model, produces |
| /// an ADDI8 instruction that adds G8RReg to sym\@toc\@l. |
| /// Preceded by an ADDIS_TOC_HA to form a full 32-bit offset. |
| ADDI_TOC_L, |
| |
| /// VSRC, CHAIN = LXVD2X_LE CHAIN, Ptr - Occurs only for little endian. |
| /// Maps directly to an lxvd2x instruction that will be followed by |
| /// an xxswapd. |
| LXVD2X, |
| |
| /// CHAIN = STXVD2X CHAIN, VSRC, Ptr - Occurs only for little endian. |
| /// Maps directly to an stxvd2x instruction that will be preceded by |
| /// an xxswapd. |
| STXVD2X |
| }; |
| } |
| |
| /// Define some predicates that are used for node matching. |
| namespace PPC { |
| /// isVPKUHUMShuffleMask - Return true if this is the shuffle mask for a |
| /// VPKUHUM instruction. |
| bool isVPKUHUMShuffleMask(ShuffleVectorSDNode *N, unsigned ShuffleKind, |
| SelectionDAG &DAG); |
| |
| /// isVPKUWUMShuffleMask - Return true if this is the shuffle mask for a |
| /// VPKUWUM instruction. |
| bool isVPKUWUMShuffleMask(ShuffleVectorSDNode *N, unsigned ShuffleKind, |
| SelectionDAG &DAG); |
| |
| /// isVMRGLShuffleMask - Return true if this is a shuffle mask suitable for |
| /// a VRGL* instruction with the specified unit size (1,2 or 4 bytes). |
| bool isVMRGLShuffleMask(ShuffleVectorSDNode *N, unsigned UnitSize, |
| unsigned ShuffleKind, SelectionDAG &DAG); |
| |
| /// isVMRGHShuffleMask - Return true if this is a shuffle mask suitable for |
| /// a VRGH* instruction with the specified unit size (1,2 or 4 bytes). |
| bool isVMRGHShuffleMask(ShuffleVectorSDNode *N, unsigned UnitSize, |
| unsigned ShuffleKind, SelectionDAG &DAG); |
| |
| /// isVSLDOIShuffleMask - If this is a vsldoi shuffle mask, return the |
| /// shift amount, otherwise return -1. |
| int isVSLDOIShuffleMask(SDNode *N, unsigned ShuffleKind, |
| SelectionDAG &DAG); |
| |
| /// isSplatShuffleMask - Return true if the specified VECTOR_SHUFFLE operand |
| /// specifies a splat of a single element that is suitable for input to |
| /// VSPLTB/VSPLTH/VSPLTW. |
| bool isSplatShuffleMask(ShuffleVectorSDNode *N, unsigned EltSize); |
| |
| /// isAllNegativeZeroVector - Returns true if all elements of build_vector |
| /// are -0.0. |
| bool isAllNegativeZeroVector(SDNode *N); |
| |
| /// getVSPLTImmediate - Return the appropriate VSPLT* immediate to splat the |
| /// specified isSplatShuffleMask VECTOR_SHUFFLE mask. |
| unsigned getVSPLTImmediate(SDNode *N, unsigned EltSize, SelectionDAG &DAG); |
| |
| /// get_VSPLTI_elt - If this is a build_vector of constants which can be |
| /// formed by using a vspltis[bhw] instruction of the specified element |
| /// size, return the constant being splatted. The ByteSize field indicates |
| /// the number of bytes of each element [124] -> [bhw]. |
| SDValue get_VSPLTI_elt(SDNode *N, unsigned ByteSize, SelectionDAG &DAG); |
| } |
| |
| class PPCSubtarget; |
| class PPCTargetLowering : public TargetLowering { |
| const PPCSubtarget &Subtarget; |
| |
| public: |
| explicit PPCTargetLowering(const PPCTargetMachine &TM); |
| |
| /// getTargetNodeName() - This method returns the name of a target specific |
| /// DAG node. |
| const char *getTargetNodeName(unsigned Opcode) const override; |
| |
| MVT getScalarShiftAmountTy(EVT LHSTy) const override { return MVT::i32; } |
| |
| bool isCheapToSpeculateCttz() const override { |
| return true; |
| } |
| |
| bool isCheapToSpeculateCtlz() const override { |
| return true; |
| } |
| |
| /// getSetCCResultType - Return the ISD::SETCC ValueType |
| EVT getSetCCResultType(LLVMContext &Context, EVT VT) const override; |
| |
| /// Return true if target always beneficiates from combining into FMA for a |
| /// given value type. This must typically return false on targets where FMA |
| /// takes more cycles to execute than FADD. |
| bool enableAggressiveFMAFusion(EVT VT) const override; |
| |
| /// getPreIndexedAddressParts - returns true by value, base pointer and |
| /// offset pointer and addressing mode by reference if the node's address |
| /// can be legally represented as pre-indexed load / store address. |
| bool getPreIndexedAddressParts(SDNode *N, SDValue &Base, |
| SDValue &Offset, |
| ISD::MemIndexedMode &AM, |
| SelectionDAG &DAG) const override; |
| |
| /// SelectAddressRegReg - Given the specified addressed, check to see if it |
| /// can be represented as an indexed [r+r] operation. Returns false if it |
| /// can be more efficiently represented with [r+imm]. |
| bool SelectAddressRegReg(SDValue N, SDValue &Base, SDValue &Index, |
| SelectionDAG &DAG) const; |
| |
| /// SelectAddressRegImm - Returns true if the address N can be represented |
| /// by a base register plus a signed 16-bit displacement [r+imm], and if it |
| /// is not better represented as reg+reg. If Aligned is true, only accept |
| /// displacements suitable for STD and friends, i.e. multiples of 4. |
| bool SelectAddressRegImm(SDValue N, SDValue &Disp, SDValue &Base, |
| SelectionDAG &DAG, bool Aligned) const; |
| |
| /// SelectAddressRegRegOnly - Given the specified addressed, force it to be |
| /// represented as an indexed [r+r] operation. |
| bool SelectAddressRegRegOnly(SDValue N, SDValue &Base, SDValue &Index, |
| SelectionDAG &DAG) const; |
| |
| Sched::Preference getSchedulingPreference(SDNode *N) const override; |
| |
| /// LowerOperation - Provide custom lowering hooks for some operations. |
| /// |
| SDValue LowerOperation(SDValue Op, SelectionDAG &DAG) const override; |
| |
| /// ReplaceNodeResults - Replace the results of node with an illegal result |
| /// type with new values built out of custom code. |
| /// |
| void ReplaceNodeResults(SDNode *N, SmallVectorImpl<SDValue>&Results, |
| SelectionDAG &DAG) const override; |
| |
| SDValue expandVSXLoadForLE(SDNode *N, DAGCombinerInfo &DCI) const; |
| SDValue expandVSXStoreForLE(SDNode *N, DAGCombinerInfo &DCI) const; |
| |
| SDValue PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const override; |
| |
| SDValue BuildSDIVPow2(SDNode *N, const APInt &Divisor, SelectionDAG &DAG, |
| std::vector<SDNode *> *Created) const override; |
| |
| unsigned getRegisterByName(const char* RegName, EVT VT) const override; |
| |
| void computeKnownBitsForTargetNode(const SDValue Op, |
| APInt &KnownZero, |
| APInt &KnownOne, |
| const SelectionDAG &DAG, |
| unsigned Depth = 0) const override; |
| |
| unsigned getPrefLoopAlignment(MachineLoop *ML) const override; |
| |
| Instruction* emitLeadingFence(IRBuilder<> &Builder, AtomicOrdering Ord, |
| bool IsStore, bool IsLoad) const override; |
| Instruction* emitTrailingFence(IRBuilder<> &Builder, AtomicOrdering Ord, |
| bool IsStore, bool IsLoad) const override; |
| |
| MachineBasicBlock * |
| EmitInstrWithCustomInserter(MachineInstr *MI, |
| MachineBasicBlock *MBB) const override; |
| MachineBasicBlock *EmitAtomicBinary(MachineInstr *MI, |
| MachineBasicBlock *MBB, bool is64Bit, |
| unsigned BinOpcode) const; |
| MachineBasicBlock *EmitPartwordAtomicBinary(MachineInstr *MI, |
| MachineBasicBlock *MBB, |
| bool is8bit, unsigned Opcode) const; |
| |
| MachineBasicBlock *emitEHSjLjSetJmp(MachineInstr *MI, |
| MachineBasicBlock *MBB) const; |
| |
| MachineBasicBlock *emitEHSjLjLongJmp(MachineInstr *MI, |
| MachineBasicBlock *MBB) const; |
| |
| ConstraintType |
| getConstraintType(const std::string &Constraint) const override; |
| |
| /// Examine constraint string and operand type and determine a weight value. |
| /// The operand object must already have been set up with the operand type. |
| ConstraintWeight getSingleConstraintMatchWeight( |
| AsmOperandInfo &info, const char *constraint) const override; |
| |
| std::pair<unsigned, const TargetRegisterClass*> |
| getRegForInlineAsmConstraint(const std::string &Constraint, |
| MVT VT) const override; |
| |
| /// getByValTypeAlignment - Return the desired alignment for ByVal aggregate |
| /// function arguments in the caller parameter area. This is the actual |
| /// alignment, not its logarithm. |
| unsigned getByValTypeAlignment(Type *Ty) const override; |
| |
| /// LowerAsmOperandForConstraint - Lower the specified operand into the Ops |
| /// vector. If it is invalid, don't add anything to Ops. |
| void LowerAsmOperandForConstraint(SDValue Op, |
| std::string &Constraint, |
| std::vector<SDValue> &Ops, |
| SelectionDAG &DAG) const override; |
| |
| /// isLegalAddressingMode - Return true if the addressing mode represented |
| /// by AM is legal for this target, for a load/store of the specified type. |
| bool isLegalAddressingMode(const AddrMode &AM, Type *Ty) const override; |
| |
| /// isLegalICmpImmediate - Return true if the specified immediate is legal |
| /// icmp immediate, that is the target has icmp instructions which can |
| /// compare a register against the immediate without having to materialize |
| /// the immediate into a register. |
| bool isLegalICmpImmediate(int64_t Imm) const override; |
| |
| /// isLegalAddImmediate - Return true if the specified immediate is legal |
| /// add immediate, that is the target has add instructions which can |
| /// add a register and the immediate without having to materialize |
| /// the immediate into a register. |
| bool isLegalAddImmediate(int64_t Imm) const override; |
| |
| /// isTruncateFree - Return true if it's free to truncate a value of |
| /// type Ty1 to type Ty2. e.g. On PPC it's free to truncate a i64 value in |
| /// register X1 to i32 by referencing its sub-register R1. |
| bool isTruncateFree(Type *Ty1, Type *Ty2) const override; |
| bool isTruncateFree(EVT VT1, EVT VT2) const override; |
| |
| bool isZExtFree(SDValue Val, EVT VT2) const override; |
| |
| bool isFPExtFree(EVT VT) const override; |
| |
| /// \brief Returns true if it is beneficial to convert a load of a constant |
| /// to just the constant itself. |
| bool shouldConvertConstantLoadToIntImm(const APInt &Imm, |
| Type *Ty) const override; |
| |
| bool isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const override; |
| |
| bool getTgtMemIntrinsic(IntrinsicInfo &Info, |
| const CallInst &I, |
| unsigned Intrinsic) const override; |
| |
| /// getOptimalMemOpType - Returns the target specific optimal type for load |
| /// and store operations as a result of memset, memcpy, and memmove |
| /// lowering. If DstAlign is zero that means it's safe to destination |
| /// alignment can satisfy any constraint. Similarly if SrcAlign is zero it |
| /// means there isn't a need to check it against alignment requirement, |
| /// probably because the source does not need to be loaded. If 'IsMemset' is |
| /// true, that means it's expanding a memset. If 'ZeroMemset' is true, that |
| /// means it's a memset of zero. 'MemcpyStrSrc' indicates whether the memcpy |
| /// source is constant so it does not need to be loaded. |
| /// It returns EVT::Other if the type should be determined using generic |
| /// target-independent logic. |
| EVT |
| getOptimalMemOpType(uint64_t Size, unsigned DstAlign, unsigned SrcAlign, |
| bool IsMemset, bool ZeroMemset, bool MemcpyStrSrc, |
| MachineFunction &MF) const override; |
| |
| /// Is unaligned memory access allowed for the given type, and is it fast |
| /// relative to software emulation. |
| bool allowsMisalignedMemoryAccesses(EVT VT, |
| unsigned AddrSpace, |
| unsigned Align = 1, |
| bool *Fast = nullptr) const override; |
| |
| /// isFMAFasterThanFMulAndFAdd - Return true if an FMA operation is faster |
| /// than a pair of fmul and fadd instructions. fmuladd intrinsics will be |
| /// expanded to FMAs when this method returns true, otherwise fmuladd is |
| /// expanded to fmul + fadd. |
| bool isFMAFasterThanFMulAndFAdd(EVT VT) const override; |
| |
| const MCPhysReg *getScratchRegisters(CallingConv::ID CC) const override; |
| |
| // Should we expand the build vector with shuffles? |
| bool |
| shouldExpandBuildVectorWithShuffles(EVT VT, |
| unsigned DefinedValues) const override; |
| |
| /// createFastISel - This method returns a target-specific FastISel object, |
| /// or null if the target does not support "fast" instruction selection. |
| FastISel *createFastISel(FunctionLoweringInfo &FuncInfo, |
| const TargetLibraryInfo *LibInfo) const override; |
| |
| /// \brief Returns true if an argument of type Ty needs to be passed in a |
| /// contiguous block of registers in calling convention CallConv. |
| bool functionArgumentNeedsConsecutiveRegisters( |
| Type *Ty, CallingConv::ID CallConv, bool isVarArg) const override { |
| // We support any array type as "consecutive" block in the parameter |
| // save area. The element type defines the alignment requirement and |
| // whether the argument should go in GPRs, FPRs, or VRs if available. |
| // |
| // Note that clang uses this capability both to implement the ELFv2 |
| // homogeneous float/vector aggregate ABI, and to avoid having to use |
| // "byval" when passing aggregates that might fully fit in registers. |
| return Ty->isArrayTy(); |
| } |
| |
| private: |
| |
| struct ReuseLoadInfo { |
| SDValue Ptr; |
| SDValue Chain; |
| SDValue ResChain; |
| MachinePointerInfo MPI; |
| bool IsInvariant; |
| unsigned Alignment; |
| AAMDNodes AAInfo; |
| const MDNode *Ranges; |
| |
| ReuseLoadInfo() : IsInvariant(false), Alignment(0), Ranges(nullptr) {} |
| }; |
| |
| bool canReuseLoadAddress(SDValue Op, EVT MemVT, ReuseLoadInfo &RLI, |
| SelectionDAG &DAG, |
| ISD::LoadExtType ET = ISD::NON_EXTLOAD) const; |
| void spliceIntoChain(SDValue ResChain, SDValue NewResChain, |
| SelectionDAG &DAG) const; |
| |
| void LowerFP_TO_INTForReuse(SDValue Op, ReuseLoadInfo &RLI, |
| SelectionDAG &DAG, SDLoc dl) const; |
| |
| SDValue getFramePointerFrameIndex(SelectionDAG & DAG) const; |
| SDValue getReturnAddrFrameIndex(SelectionDAG & DAG) const; |
| |
| bool |
| IsEligibleForTailCallOptimization(SDValue Callee, |
| CallingConv::ID CalleeCC, |
| bool isVarArg, |
| const SmallVectorImpl<ISD::InputArg> &Ins, |
| SelectionDAG& DAG) const; |
| |
| SDValue EmitTailCallLoadFPAndRetAddr(SelectionDAG & DAG, |
| int SPDiff, |
| SDValue Chain, |
| SDValue &LROpOut, |
| SDValue &FPOpOut, |
| bool isDarwinABI, |
| SDLoc dl) const; |
| |
| SDValue LowerRETURNADDR(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerConstantPool(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerBlockAddress(SDValue Op, SelectionDAG &DAG) const; |
| std::pair<SDValue,SDValue> lowerTLSCall(SDValue Op, SDLoc dl, |
| SelectionDAG &DAG) const; |
| SDValue LowerGlobalTLSAddress(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerGlobalAddress(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerJumpTable(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerSETCC(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerINIT_TRAMPOLINE(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerADJUST_TRAMPOLINE(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerVASTART(SDValue Op, SelectionDAG &DAG, |
| const PPCSubtarget &Subtarget) const; |
| SDValue LowerVAARG(SDValue Op, SelectionDAG &DAG, |
| const PPCSubtarget &Subtarget) const; |
| SDValue LowerVACOPY(SDValue Op, SelectionDAG &DAG, |
| const PPCSubtarget &Subtarget) const; |
| SDValue LowerSTACKRESTORE(SDValue Op, SelectionDAG &DAG, |
| const PPCSubtarget &Subtarget) const; |
| SDValue LowerDYNAMIC_STACKALLOC(SDValue Op, SelectionDAG &DAG, |
| const PPCSubtarget &Subtarget) const; |
| SDValue LowerLOAD(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerSTORE(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerTRUNCATE(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerSELECT_CC(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerFP_TO_INT(SDValue Op, SelectionDAG &DAG, SDLoc dl) const; |
| SDValue LowerINT_TO_FP(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerFLT_ROUNDS_(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerSHL_PARTS(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerSRL_PARTS(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerSRA_PARTS(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerBUILD_VECTOR(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerVECTOR_SHUFFLE(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerSCALAR_TO_VECTOR(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerSIGN_EXTEND_INREG(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerMUL(SDValue Op, SelectionDAG &DAG) const; |
| |
| SDValue LowerCallResult(SDValue Chain, SDValue InFlag, |
| CallingConv::ID CallConv, bool isVarArg, |
| const SmallVectorImpl<ISD::InputArg> &Ins, |
| SDLoc dl, SelectionDAG &DAG, |
| SmallVectorImpl<SDValue> &InVals) const; |
| SDValue FinishCall(CallingConv::ID CallConv, SDLoc dl, bool isTailCall, |
| bool isVarArg, bool IsPatchPoint, |
| SelectionDAG &DAG, |
| SmallVector<std::pair<unsigned, SDValue>, 8> |
| &RegsToPass, |
| SDValue InFlag, SDValue Chain, |
| SDValue &Callee, |
| int SPDiff, unsigned NumBytes, |
| const SmallVectorImpl<ISD::InputArg> &Ins, |
| SmallVectorImpl<SDValue> &InVals) const; |
| |
| SDValue |
| LowerFormalArguments(SDValue Chain, |
| CallingConv::ID CallConv, bool isVarArg, |
| const SmallVectorImpl<ISD::InputArg> &Ins, |
| SDLoc dl, SelectionDAG &DAG, |
| SmallVectorImpl<SDValue> &InVals) const override; |
| |
| SDValue |
| LowerCall(TargetLowering::CallLoweringInfo &CLI, |
| SmallVectorImpl<SDValue> &InVals) const override; |
| |
| bool |
| CanLowerReturn(CallingConv::ID CallConv, MachineFunction &MF, |
| bool isVarArg, |
| const SmallVectorImpl<ISD::OutputArg> &Outs, |
| LLVMContext &Context) const override; |
| |
| SDValue |
| LowerReturn(SDValue Chain, |
| CallingConv::ID CallConv, bool isVarArg, |
| const SmallVectorImpl<ISD::OutputArg> &Outs, |
| const SmallVectorImpl<SDValue> &OutVals, |
| SDLoc dl, SelectionDAG &DAG) const override; |
| |
| SDValue |
| extendArgForPPC64(ISD::ArgFlagsTy Flags, EVT ObjectVT, SelectionDAG &DAG, |
| SDValue ArgVal, SDLoc dl) const; |
| |
| SDValue |
| LowerFormalArguments_Darwin(SDValue Chain, |
| CallingConv::ID CallConv, bool isVarArg, |
| const SmallVectorImpl<ISD::InputArg> &Ins, |
| SDLoc dl, SelectionDAG &DAG, |
| SmallVectorImpl<SDValue> &InVals) const; |
| SDValue |
| LowerFormalArguments_64SVR4(SDValue Chain, |
| CallingConv::ID CallConv, bool isVarArg, |
| const SmallVectorImpl<ISD::InputArg> &Ins, |
| SDLoc dl, SelectionDAG &DAG, |
| SmallVectorImpl<SDValue> &InVals) const; |
| SDValue |
| LowerFormalArguments_32SVR4(SDValue Chain, |
| CallingConv::ID CallConv, bool isVarArg, |
| const SmallVectorImpl<ISD::InputArg> &Ins, |
| SDLoc dl, SelectionDAG &DAG, |
| SmallVectorImpl<SDValue> &InVals) const; |
| |
| SDValue |
| createMemcpyOutsideCallSeq(SDValue Arg, SDValue PtrOff, |
| SDValue CallSeqStart, ISD::ArgFlagsTy Flags, |
| SelectionDAG &DAG, SDLoc dl) const; |
| |
| SDValue |
| LowerCall_Darwin(SDValue Chain, SDValue Callee, |
| CallingConv::ID CallConv, |
| bool isVarArg, bool isTailCall, bool IsPatchPoint, |
| const SmallVectorImpl<ISD::OutputArg> &Outs, |
| const SmallVectorImpl<SDValue> &OutVals, |
| const SmallVectorImpl<ISD::InputArg> &Ins, |
| SDLoc dl, SelectionDAG &DAG, |
| SmallVectorImpl<SDValue> &InVals) const; |
| SDValue |
| LowerCall_64SVR4(SDValue Chain, SDValue Callee, |
| CallingConv::ID CallConv, |
| bool isVarArg, bool isTailCall, bool IsPatchPoint, |
| const SmallVectorImpl<ISD::OutputArg> &Outs, |
| const SmallVectorImpl<SDValue> &OutVals, |
| const SmallVectorImpl<ISD::InputArg> &Ins, |
| SDLoc dl, SelectionDAG &DAG, |
| SmallVectorImpl<SDValue> &InVals) const; |
| SDValue |
| LowerCall_32SVR4(SDValue Chain, SDValue Callee, CallingConv::ID CallConv, |
| bool isVarArg, bool isTailCall, bool IsPatchPoint, |
| const SmallVectorImpl<ISD::OutputArg> &Outs, |
| const SmallVectorImpl<SDValue> &OutVals, |
| const SmallVectorImpl<ISD::InputArg> &Ins, |
| SDLoc dl, SelectionDAG &DAG, |
| SmallVectorImpl<SDValue> &InVals) const; |
| |
| SDValue lowerEH_SJLJ_SETJMP(SDValue Op, SelectionDAG &DAG) const; |
| SDValue lowerEH_SJLJ_LONGJMP(SDValue Op, SelectionDAG &DAG) const; |
| |
| SDValue DAGCombineExtBoolTrunc(SDNode *N, DAGCombinerInfo &DCI) const; |
| SDValue DAGCombineTruncBoolExt(SDNode *N, DAGCombinerInfo &DCI) const; |
| SDValue combineFPToIntToFP(SDNode *N, DAGCombinerInfo &DCI) const; |
| |
| SDValue getRsqrtEstimate(SDValue Operand, DAGCombinerInfo &DCI, |
| unsigned &RefinementSteps, |
| bool &UseOneConstNR) const override; |
| SDValue getRecipEstimate(SDValue Operand, DAGCombinerInfo &DCI, |
| unsigned &RefinementSteps) const override; |
| bool combineRepeatedFPDivisors(unsigned NumUsers) const override; |
| |
| CCAssignFn *useFastISelCCs(unsigned Flag) const; |
| }; |
| |
| namespace PPC { |
| FastISel *createFastISel(FunctionLoweringInfo &FuncInfo, |
| const TargetLibraryInfo *LibInfo); |
| } |
| |
| bool CC_PPC32_SVR4_Custom_Dummy(unsigned &ValNo, MVT &ValVT, MVT &LocVT, |
| CCValAssign::LocInfo &LocInfo, |
| ISD::ArgFlagsTy &ArgFlags, |
| CCState &State); |
| |
| bool CC_PPC32_SVR4_Custom_AlignArgRegs(unsigned &ValNo, MVT &ValVT, |
| MVT &LocVT, |
| CCValAssign::LocInfo &LocInfo, |
| ISD::ArgFlagsTy &ArgFlags, |
| CCState &State); |
| |
| bool CC_PPC32_SVR4_Custom_AlignFPArgRegs(unsigned &ValNo, MVT &ValVT, |
| MVT &LocVT, |
| CCValAssign::LocInfo &LocInfo, |
| ISD::ArgFlagsTy &ArgFlags, |
| CCState &State); |
| } |
| |
| #endif // LLVM_TARGET_POWERPC_PPC32ISELLOWERING_H |