+
+ virtual MachineBasicBlock *
+ EmitInstrWithCustomInserter(MachineInstr *MI, MachineBasicBlock *MBB) const;
+
+ struct LTStr {
+ bool operator()(const char *S1, const char *S2) const {
+ return strcmp(S1, S2) < 0;
+ }
+ };
+
+ protected:
+ SDValue getGlobalReg(SelectionDAG &DAG, EVT Ty) const;
+
+ // This method creates the following nodes, which are necessary for
+ // computing a local symbol's address:
+ //
+ // (add (load (wrapper $gp, %got(sym)), %lo(sym))
+ template<class NodeTy>
+ SDValue getAddrLocal(NodeTy *N, EVT Ty, SelectionDAG &DAG,
+ bool HasMips64) const {
+ SDLoc DL(N);
+ unsigned GOTFlag = HasMips64 ? MipsII::MO_GOT_PAGE : MipsII::MO_GOT;
+ SDValue GOT = DAG.getNode(MipsISD::Wrapper, DL, Ty, getGlobalReg(DAG, Ty),
+ getTargetNode(N, Ty, DAG, GOTFlag));
+ SDValue Load = DAG.getLoad(Ty, DL, DAG.getEntryNode(), GOT,
+ MachinePointerInfo::getGOT(), false, false,
+ false, 0);
+ unsigned LoFlag = HasMips64 ? MipsII::MO_GOT_OFST : MipsII::MO_ABS_LO;
+ SDValue Lo = DAG.getNode(MipsISD::Lo, DL, Ty,
+ getTargetNode(N, Ty, DAG, LoFlag));
+ return DAG.getNode(ISD::ADD, DL, Ty, Load, Lo);
+ }
+
+ // This method creates the following nodes, which are necessary for
+ // computing a global symbol's address:
+ //
+ // (load (wrapper $gp, %got(sym)))
+ template<class NodeTy>
+ SDValue getAddrGlobal(NodeTy *N, EVT Ty, SelectionDAG &DAG,
+ unsigned Flag, SDValue Chain,
+ const MachinePointerInfo &PtrInfo) const {
+ SDLoc DL(N);
+ SDValue Tgt = DAG.getNode(MipsISD::Wrapper, DL, Ty, getGlobalReg(DAG, Ty),
+ getTargetNode(N, Ty, DAG, Flag));
+ return DAG.getLoad(Ty, DL, Chain, Tgt, PtrInfo, false, false, false, 0);
+ }
+
+ // This method creates the following nodes, which are necessary for
+ // computing a global symbol's address in large-GOT mode:
+ //
+ // (load (wrapper (add %hi(sym), $gp), %lo(sym)))
+ template<class NodeTy>
+ SDValue getAddrGlobalLargeGOT(NodeTy *N, EVT Ty, SelectionDAG &DAG,
+ unsigned HiFlag, unsigned LoFlag,
+ SDValue Chain,
+ const MachinePointerInfo &PtrInfo) const {
+ SDLoc DL(N);
+ SDValue Hi = DAG.getNode(MipsISD::Hi, DL, Ty,
+ getTargetNode(N, Ty, DAG, HiFlag));
+ Hi = DAG.getNode(ISD::ADD, DL, Ty, Hi, getGlobalReg(DAG, Ty));
+ SDValue Wrapper = DAG.getNode(MipsISD::Wrapper, DL, Ty, Hi,
+ getTargetNode(N, Ty, DAG, LoFlag));
+ return DAG.getLoad(Ty, DL, Chain, Wrapper, PtrInfo, false, false, false,
+ 0);
+ }
+
+ // This method creates the following nodes, which are necessary for
+ // computing a symbol's address in non-PIC mode:
+ //
+ // (add %hi(sym), %lo(sym))
+ template<class NodeTy>
+ SDValue getAddrNonPIC(NodeTy *N, EVT Ty, SelectionDAG &DAG) const {
+ SDLoc DL(N);
+ SDValue Hi = getTargetNode(N, Ty, DAG, MipsII::MO_ABS_HI);
+ SDValue Lo = getTargetNode(N, Ty, DAG, MipsII::MO_ABS_LO);
+ return DAG.getNode(ISD::ADD, DL, Ty,
+ DAG.getNode(MipsISD::Hi, DL, Ty, Hi),
+ DAG.getNode(MipsISD::Lo, DL, Ty, Lo));
+ }
+
+ /// This function fills Ops, which is the list of operands that will later
+ /// be used when a function call node is created. It also generates
+ /// copyToReg nodes to set up argument registers.
+ virtual void
+ getOpndList(SmallVectorImpl<SDValue> &Ops,
+ std::deque< std::pair<unsigned, SDValue> > &RegsToPass,
+ bool IsPICCall, bool GlobalOrExternal, bool InternalLinkage,
+ CallLoweringInfo &CLI, SDValue Callee, SDValue Chain) const;
+
+ /// ByValArgInfo - Byval argument information.
+ struct ByValArgInfo {
+ unsigned FirstIdx; // Index of the first register used.
+ unsigned NumRegs; // Number of registers used for this argument.
+ unsigned Address; // Offset of the stack area used to pass this argument.
+
+ ByValArgInfo() : FirstIdx(0), NumRegs(0), Address(0) {}
+ };
+
+ /// MipsCC - This class provides methods used to analyze formal and call
+ /// arguments and inquire about calling convention information.
+ class MipsCC {
+ public:
+ enum SpecialCallingConvType {
+ Mips16RetHelperConv, NoSpecialCallingConv
+ };
+
+ MipsCC(CallingConv::ID CallConv, bool IsO32, bool IsFP64, CCState &Info,
+ SpecialCallingConvType SpecialCallingConv = NoSpecialCallingConv);
+
+
+ void analyzeCallOperands(const SmallVectorImpl<ISD::OutputArg> &Outs,
+ bool IsVarArg, bool IsSoftFloat,
+ const SDNode *CallNode,
+ std::vector<ArgListEntry> &FuncArgs);
+ void analyzeFormalArguments(const SmallVectorImpl<ISD::InputArg> &Ins,
+ bool IsSoftFloat,
+ Function::const_arg_iterator FuncArg);
+
+ void analyzeCallResult(const SmallVectorImpl<ISD::InputArg> &Ins,
+ bool IsSoftFloat, const SDNode *CallNode,
+ const Type *RetTy) const;
+
+ void analyzeReturn(const SmallVectorImpl<ISD::OutputArg> &Outs,
+ bool IsSoftFloat, const Type *RetTy) const;
+
+ const CCState &getCCInfo() const { return CCInfo; }
+
+ /// hasByValArg - Returns true if function has byval arguments.
+ bool hasByValArg() const { return !ByValArgs.empty(); }
+
+ /// regSize - Size (in number of bits) of integer registers.
+ unsigned regSize() const { return IsO32 ? 4 : 8; }
+
+ /// numIntArgRegs - Number of integer registers available for calls.
+ unsigned numIntArgRegs() const;
+
+ /// reservedArgArea - The size of the area the caller reserves for
+ /// register arguments. This is 16-byte if ABI is O32.
+ unsigned reservedArgArea() const;
+
+ /// Return pointer to array of integer argument registers.
+ const uint16_t *intArgRegs() const;
+
+ typedef SmallVectorImpl<ByValArgInfo>::const_iterator byval_iterator;
+ byval_iterator byval_begin() const { return ByValArgs.begin(); }
+ byval_iterator byval_end() const { return ByValArgs.end(); }
+
+ private:
+ void handleByValArg(unsigned ValNo, MVT ValVT, MVT LocVT,
+ CCValAssign::LocInfo LocInfo,
+ ISD::ArgFlagsTy ArgFlags);
+
+ /// useRegsForByval - Returns true if the calling convention allows the
+ /// use of registers to pass byval arguments.
+ bool useRegsForByval() const { return CallConv != CallingConv::Fast; }
+
+ /// Return the function that analyzes fixed argument list functions.
+ llvm::CCAssignFn *fixedArgFn() const;
+
+ /// Return the function that analyzes variable argument list functions.
+ llvm::CCAssignFn *varArgFn() const;
+
+ const uint16_t *shadowRegs() const;
+
+ void allocateRegs(ByValArgInfo &ByVal, unsigned ByValSize,
+ unsigned Align);
+
+ /// Return the type of the register which is used to pass an argument or
+ /// return a value. This function returns f64 if the argument is an i64
+ /// value which has been generated as a result of softening an f128 value.
+ /// Otherwise, it just returns VT.
+ MVT getRegVT(MVT VT, const Type *OrigTy, const SDNode *CallNode,
+ bool IsSoftFloat) const;
+
+ template<typename Ty>
+ void analyzeReturn(const SmallVectorImpl<Ty> &RetVals, bool IsSoftFloat,
+ const SDNode *CallNode, const Type *RetTy) const;
+
+ CCState &CCInfo;
+ CallingConv::ID CallConv;
+ bool IsO32, IsFP64;
+ SpecialCallingConvType SpecialCallingConv;
+ SmallVector<ByValArgInfo, 2> ByValArgs;
+ };
+ protected:
+ SDValue lowerLOAD(SDValue Op, SelectionDAG &DAG) const;
+ SDValue lowerSTORE(SDValue Op, SelectionDAG &DAG) const;
+