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/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 19 using namespace llvm; 20 21 #define DEBUG_TYPE "mips-isel" 22 23 namespace { 24 class MipsModuleDAGToDAGISel : public MachineFunctionPass { 25 public: 26 static char ID; 27 28 MipsModuleDAGToDAGISel() : MachineFunctionPass(ID) {} 29 30 // Pass Name 31 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 47 bool 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 55 llvm::FunctionPass *llvm::createMipsModuleISelDagPass() { 56 return new MipsModuleDAGToDAGISel(); 57 } 58