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/CodeGen/TargetPassConfig.h"
14#include "llvm/CodeGen/StackProtector.h"
15#include "llvm/Support/Debug.h"
16#include "llvm/Support/raw_ostream.h"
17
18using namespace llvm;
19
20#define DEBUG_TYPE "mips-isel"
21
22namespace {
23  class MipsModuleDAGToDAGISel : public MachineFunctionPass {
24  public:
25    static char ID;
26
27    MipsModuleDAGToDAGISel() : MachineFunctionPass(ID) {}
28
29    // Pass Name
30    StringRef getPassName() const override {
31      return "MIPS DAG->DAG Pattern Instruction Selection";
32    }
33
34    void getAnalysisUsage(AnalysisUsage &AU) const override {
35      AU.addRequired<TargetPassConfig>();
36      AU.addPreserved<StackProtector>();
37      MachineFunctionPass::getAnalysisUsage(AU);
38    }
39
40    bool runOnMachineFunction(MachineFunction &MF) override;
41  };
42
43  char MipsModuleDAGToDAGISel::ID = 0;
44}
45
46bool MipsModuleDAGToDAGISel::runOnMachineFunction(MachineFunction &MF) {
47  LLVM_DEBUG(errs() << "In MipsModuleDAGToDAGISel::runMachineFunction\n");
48  auto &TPC = getAnalysis<TargetPassConfig>();
49  auto &TM = TPC.getTM<MipsTargetMachine>();
50  TM.resetSubtarget(&MF);
51  return false;
52}
53
54llvm::FunctionPass *llvm::createMipsModuleISelDagPass() {
55  return new MipsModuleDAGToDAGISel();
56}
57