MipsModuleISelDAGToDAG.cpp revision 288943 
1//===----------------------------------------------------------------------===//
2// Instruction Selector Subtarget Control
3//===----------------------------------------------------------------------===//
4
5//===----------------------------------------------------------------------===//
6// This file defines a pass used to change the subtarget for the
7// Mips Instruction selector.
8//
9//===----------------------------------------------------------------------===//
10
11#include "Mips.h"
12#include "MipsTargetMachine.h"
13#include "llvm/Support/Debug.h"
14#include "llvm/Support/raw_ostream.h"
15
16using namespace llvm;
17
18#define DEBUG_TYPE "mips-isel"
19
20namespace {
21  class MipsModuleDAGToDAGISel : public MachineFunctionPass {
22  public:
23    static char ID;
24
25    explicit MipsModuleDAGToDAGISel(MipsTargetMachine &TM_)
26      : MachineFunctionPass(ID), TM(TM_) {}
27
28    // Pass Name
29    const char *getPassName() const override {
30      return "MIPS DAG->DAG Pattern Instruction Selection";
31    }
32
33    bool runOnMachineFunction(MachineFunction &MF) override;
34
35  protected:
36    MipsTargetMachine &TM;
37  };
38
39  char MipsModuleDAGToDAGISel::ID = 0;
40}
41
42bool MipsModuleDAGToDAGISel::runOnMachineFunction(MachineFunction &MF) {
43  DEBUG(errs() << "In MipsModuleDAGToDAGISel::runMachineFunction\n");
44  TM.resetSubtarget(&MF);
45  return false;
46}
47
48llvm::FunctionPass *llvm::createMipsModuleISelDagPass(MipsTargetMachine &TM) {
49  return new MipsModuleDAGToDAGISel(TM);
50}
51