| 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: &MF); |
| 52 | return false; |
| 53 | } |
| 54 | |
| 55 | llvm::FunctionPass *llvm::createMipsModuleISelDagPass() { |
| 56 | return new MipsModuleDAGToDAGISel(); |
| 57 | } |
| 58 |