58 lines · cpp
1//===----------------------------------------------------------------------===//2// Instruction Selector Subtarget Control3//===----------------------------------------------------------------------===//4 5//===----------------------------------------------------------------------===//6// This file defines a pass used to change the subtarget for the7// Mips Instruction selector.8//9//===----------------------------------------------------------------------===//10 11#include "Mips.h"12#include "MipsTargetMachine.h"13#include "llvm/CodeGen/MachineFunctionPass.h"14#include "llvm/CodeGen/StackProtector.h"15#include "llvm/CodeGen/TargetPassConfig.h"16#include "llvm/Support/Debug.h"17#include "llvm/Support/raw_ostream.h"18 19using namespace llvm;20 21#define DEBUG_TYPE "mips-isel"22 23namespace {24 class MipsModuleDAGToDAGISel : public MachineFunctionPass {25 public:26 static char ID;27 28 MipsModuleDAGToDAGISel() : MachineFunctionPass(ID) {}29 30 // Pass Name31 StringRef getPassName() const override {32 return "MIPS DAG->DAG Pattern Instruction Selection";33 }34 35 void getAnalysisUsage(AnalysisUsage &AU) const override {36 AU.addRequired<TargetPassConfig>();37 AU.addPreserved<StackProtector>();38 MachineFunctionPass::getAnalysisUsage(AU);39 }40 41 bool runOnMachineFunction(MachineFunction &MF) override;42 };43 44 char MipsModuleDAGToDAGISel::ID = 0;45}46 47bool MipsModuleDAGToDAGISel::runOnMachineFunction(MachineFunction &MF) {48 LLVM_DEBUG(errs() << "In MipsModuleDAGToDAGISel::runMachineFunction\n");49 auto &TPC = getAnalysis<TargetPassConfig>();50 auto &TM = TPC.getTM<MipsTargetMachine>();51 TM.resetSubtarget(&MF);52 return false;53}54 55llvm::FunctionPass *llvm::createMipsModuleISelDagPass() {56 return new MipsModuleDAGToDAGISel();57}58