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 18 using namespace llvm; 19 20 #define DEBUG_TYPE "mips-isel" 21 22 namespace { 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 46 bool 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 54 llvm::FunctionPass *llvm::createMipsModuleISelDagPass() { 55 return new MipsModuleDAGToDAGISel(); 56 } 57
