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/Support/Debug.h"
14 #include "llvm/Support/raw_ostream.h"
15 
16 using namespace llvm;
17 
18 #define DEBUG_TYPE "mips-isel"
19 
20 namespace {
21   class MipsModuleDAGToDAGISel : public MachineFunctionPass {
22   public:
23     static char ID;
24 
MipsModuleDAGToDAGISel(MipsTargetMachine & TM_)25     explicit MipsModuleDAGToDAGISel(MipsTargetMachine &TM_)
26       : MachineFunctionPass(ID), TM(TM_) {}
27 
28     // Pass Name
getPassName() const29     const char *getPassName() const override {
30       return "MIPS DAG->DAG Pattern Instruction Selection";
31     }
32 
33     bool runOnMachineFunction(MachineFunction &MF) override;
34 
35   protected:
36     MipsTargetMachine &TM;
37   };
38 
39   char MipsModuleDAGToDAGISel::ID = 0;
40 }
41 
runOnMachineFunction(MachineFunction & MF)42 bool MipsModuleDAGToDAGISel::runOnMachineFunction(MachineFunction &MF) {
43   DEBUG(errs() << "In MipsModuleDAGToDAGISel::runMachineFunction\n");
44   TM.resetSubtarget(&MF);
45   return false;
46 }
47 
createMipsModuleISelDagPass(MipsTargetMachine & TM)48 llvm::FunctionPass *llvm::createMipsModuleISelDagPass(MipsTargetMachine &TM) {
49   return new MipsModuleDAGToDAGISel(TM);
50 }
51