1 //===---- MipsModuleISelDAGToDAG.h - Change Subtarget --------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file defines a pass used to change the subtarget for the 11 // Mips Instruction selector. 12 // 13 //===----------------------------------------------------------------------===// 14 15 #ifndef MIPSMODULEISELDAGTODAG_H 16 #define MIPSMODULEISELDAGTODAG_H 17 18 #include "Mips.h" 19 #include "MipsSubtarget.h" 20 #include "MipsTargetMachine.h" 21 #include "llvm/CodeGen/SelectionDAGISel.h" 22 23 24 //===----------------------------------------------------------------------===// 25 // Instruction Selector Implementation 26 //===----------------------------------------------------------------------===// 27 28 //===----------------------------------------------------------------------===// 29 // MipsModuleDAGToDAGISel - MIPS specific code to select MIPS machine 30 // instructions for SelectionDAG operations. 31 //===----------------------------------------------------------------------===// 32 namespace llvm { 33 34 class MipsModuleDAGToDAGISel : public MachineFunctionPass { 35 public: 36 37 static char ID; 38 39 explicit MipsModuleDAGToDAGISel(MipsTargetMachine &TM_) 40 : MachineFunctionPass(ID), 41 TM(TM_), Subtarget(TM.getSubtarget<MipsSubtarget>()) {} 42 43 // Pass Name 44 virtual const char *getPassName() const { 45 return "MIPS DAG->DAG Pattern Instruction Selection"; 46 } 47 48 virtual bool runOnMachineFunction(MachineFunction &MF); 49 50 virtual SDNode *Select(SDNode *N) { 51 llvm_unreachable("unexpected"); 52 } 53 54 protected: 55 /// Keep a pointer to the MipsSubtarget around so that we can make the right 56 /// decision when generating code for different targets. 57 const TargetMachine &TM; 58 const MipsSubtarget &Subtarget; 59 }; 60 61 /// createMipsISelDag - This pass converts a legalized DAG into a 62 /// MIPS-specific DAG, ready for instruction scheduling. 63 FunctionPass *createMipsModuleISelDag(MipsTargetMachine &TM); 64 } 65 66 #endif 67
