1 //===---- MipsISelDAGToDAG.h - A Dag to Dag Inst Selector for Mips --------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file defines an instruction selector for the MIPS target. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #ifndef MIPSISELDAGTODAG_H 15 #define MIPSISELDAGTODAG_H 16 17 #include "Mips.h" 18 #include "MipsSubtarget.h" 19 #include "MipsTargetMachine.h" 20 #include "llvm/CodeGen/SelectionDAGISel.h" 21 22 //===----------------------------------------------------------------------===// 23 // Instruction Selector Implementation 24 //===----------------------------------------------------------------------===// 25 26 //===----------------------------------------------------------------------===// 27 // MipsDAGToDAGISel - MIPS specific code to select MIPS machine 28 // instructions for SelectionDAG operations. 29 //===----------------------------------------------------------------------===// 30 namespace llvm { 31 32 class MipsDAGToDAGISel : public SelectionDAGISel { 33 public: 34 explicit MipsDAGToDAGISel(MipsTargetMachine &TM) 35 : SelectionDAGISel(TM), Subtarget(TM.getSubtarget<MipsSubtarget>()) {} 36 37 // Pass Name 38 virtual const char *getPassName() const { 39 return "MIPS DAG->DAG Pattern Instruction Selection"; 40 } 41 42 virtual bool runOnMachineFunction(MachineFunction &MF); 43 44 protected: 45 SDNode *getGlobalBaseReg(); 46 47 /// Keep a pointer to the MipsSubtarget around so that we can make the right 48 /// decision when generating code for different targets. 49 const MipsSubtarget &Subtarget; 50 51 private: 52 // Include the pieces autogenerated from the target description. 53 #include "MipsGenDAGISel.inc" 54 55 // Complex Pattern. 56 /// (reg + imm). 57 virtual bool selectAddrRegImm(SDValue Addr, SDValue &Base, 58 SDValue &Offset) const; 59 60 /// Fall back on this function if all else fails. 61 virtual bool selectAddrDefault(SDValue Addr, SDValue &Base, 62 SDValue &Offset) const; 63 64 /// Match integer address pattern. 65 virtual bool selectIntAddr(SDValue Addr, SDValue &Base, 66 SDValue &Offset) const; 67 68 virtual bool selectAddr16(SDNode *Parent, SDValue N, SDValue &Base, 69 SDValue &Offset, SDValue &Alias); 70 71 virtual SDNode *Select(SDNode *N); 72 73 virtual std::pair<bool, SDNode*> selectNode(SDNode *Node) = 0; 74 75 // getImm - Return a target constant with the specified value. 76 inline SDValue getImm(const SDNode *Node, uint64_t Imm) { 77 return CurDAG->getTargetConstant(Imm, Node->getValueType(0)); 78 } 79 80 virtual void processFunctionAfterISel(MachineFunction &MF) = 0; 81 82 virtual bool SelectInlineAsmMemoryOperand(const SDValue &Op, 83 char ConstraintCode, 84 std::vector<SDValue> &OutOps); 85 }; 86 87 /// createMipsISelDag - This pass converts a legalized DAG into a 88 /// MIPS-specific DAG, ready for instruction scheduling. 89 FunctionPass *createMipsISelDag(MipsTargetMachine &TM); 90 91 } 92 93 #endif 94
