MipsModuleISelDAGToDAG.h revision dce4a407a24b04eebc6a376f8e62b41aaa7b071f 
1//===---- MipsModuleISelDAGToDAG.h -  Change Subtarget             --------===//
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 a pass used to change the subtarget for the
11// Mips Instruction selector.
12//
13//===----------------------------------------------------------------------===//
14
15#ifndef MIPSMODULEISELDAGTODAG_H
16#define MIPSMODULEISELDAGTODAG_H
17
18#include "Mips.h"
19#include "MipsSubtarget.h"
20#include "MipsTargetMachine.h"
21#include "llvm/CodeGen/SelectionDAGISel.h"
22
23
24//===----------------------------------------------------------------------===//
25// Instruction Selector Implementation
26//===----------------------------------------------------------------------===//
27
28//===----------------------------------------------------------------------===//
29// MipsModuleDAGToDAGISel - MIPS specific code to select MIPS machine
30// instructions for SelectionDAG operations.
31//===----------------------------------------------------------------------===//
32namespace llvm {
33
34class MipsModuleDAGToDAGISel : public MachineFunctionPass {
35public:
36
37  static char ID;
38
39  explicit MipsModuleDAGToDAGISel(MipsTargetMachine &TM_)
40    : MachineFunctionPass(ID),
41      TM(TM_), Subtarget(TM.getSubtarget<MipsSubtarget>()) {}
42
43  // Pass Name
44  const char *getPassName() const override {
45    return "MIPS DAG->DAG Pattern Instruction Selection";
46  }
47
48  bool runOnMachineFunction(MachineFunction &MF) override;
49
50protected:
51  /// Keep a pointer to the MipsSubtarget around so that we can make the right
52  /// decision when generating code for different targets.
53  const TargetMachine &TM;
54  const MipsSubtarget &Subtarget;
55};
56
57/// createMipsISelDag - This pass converts a legalized DAG into a
58/// MIPS-specific DAG, ready for instruction scheduling.
59FunctionPass *createMipsModuleISelDag(MipsTargetMachine &TM);
60}
61
62#endif
63