1 //===---- MipsISelDAGToDAG.h - A Dag to Dag Inst Selector for Mips --------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines an instruction selector for the MIPS target.
12 //===----------------------------------------------------------------------===//
14 #ifndef MIPSISELDAGTODAG_H
15 #define MIPSISELDAGTODAG_H
18 #include "MipsSubtarget.h"
19 #include "MipsTargetMachine.h"
20 #include "llvm/CodeGen/SelectionDAGISel.h"
22 //===----------------------------------------------------------------------===//
23 // Instruction Selector Implementation
24 //===----------------------------------------------------------------------===//
26 //===----------------------------------------------------------------------===//
27 // MipsDAGToDAGISel - MIPS specific code to select MIPS machine
28 // instructions for SelectionDAG operations.
29 //===----------------------------------------------------------------------===//
32 class MipsDAGToDAGISel : public SelectionDAGISel {
34 explicit MipsDAGToDAGISel(MipsTargetMachine &TM)
35 : SelectionDAGISel(TM), Subtarget(TM.getSubtarget<MipsSubtarget>()) {}
38 virtual const char *getPassName() const {
39 return "MIPS DAG->DAG Pattern Instruction Selection";
42 virtual bool runOnMachineFunction(MachineFunction &MF);
45 SDNode *getGlobalBaseReg();
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;
52 // Include the pieces autogenerated from the target description.
53 #include "MipsGenDAGISel.inc"
57 virtual bool selectAddrRegImm(SDValue Addr, SDValue &Base,
58 SDValue &Offset) const;
60 /// Fall back on this function if all else fails.
61 virtual bool selectAddrDefault(SDValue Addr, SDValue &Base,
62 SDValue &Offset) const;
64 /// Match integer address pattern.
65 virtual bool selectIntAddr(SDValue Addr, SDValue &Base,
66 SDValue &Offset) const;
68 virtual bool selectAddr16(SDNode *Parent, SDValue N, SDValue &Base,
69 SDValue &Offset, SDValue &Alias);
71 virtual SDNode *Select(SDNode *N);
73 virtual std::pair<bool, SDNode*> selectNode(SDNode *Node) = 0;
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));
80 virtual void processFunctionAfterISel(MachineFunction &MF) = 0;
82 virtual bool SelectInlineAsmMemoryOperand(const SDValue &Op,
84 std::vector<SDValue> &OutOps);
87 /// createMipsISelDag - This pass converts a legalized DAG into a
88 /// MIPS-specific DAG, ready for instruction scheduling.
89 FunctionPass *createMipsISelDag(MipsTargetMachine &TM);