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//===---- MipsModuleISelDAGToDAG.h - Change Subtarget --------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines a pass used to change the subtarget for the
// Mips Instruction selector.
//
//===----------------------------------------------------------------------===//
#ifndef MIPSMODULEISELDAGTODAG_H
#define MIPSMODULEISELDAGTODAG_H
#include "Mips.h"
#include "MipsSubtarget.h"
#include "MipsTargetMachine.h"
#include "llvm/CodeGen/SelectionDAGISel.h"
//===----------------------------------------------------------------------===//
// Instruction Selector Implementation
//===----------------------------------------------------------------------===//
//===----------------------------------------------------------------------===//
// MipsModuleDAGToDAGISel - MIPS specific code to select MIPS machine
// instructions for SelectionDAG operations.
//===----------------------------------------------------------------------===//
namespace llvm {
class MipsModuleDAGToDAGISel : public MachineFunctionPass {
public:
static char ID;
explicit MipsModuleDAGToDAGISel(MipsTargetMachine &TM_)
: MachineFunctionPass(ID),
TM(TM_), Subtarget(TM.getSubtarget<MipsSubtarget>()) {}
// Pass Name
virtual const char *getPassName() const {
return "MIPS DAG->DAG Pattern Instruction Selection";
}
virtual bool runOnMachineFunction(MachineFunction &MF);
virtual SDNode *Select(SDNode *N) {
llvm_unreachable("unexpected");
}
protected:
/// Keep a pointer to the MipsSubtarget around so that we can make the right
/// decision when generating code for different targets.
const TargetMachine &TM;
const MipsSubtarget &Subtarget;
};
/// createMipsISelDag - This pass converts a legalized DAG into a
/// MIPS-specific DAG, ready for instruction scheduling.
FunctionPass *createMipsModuleISelDag(MipsTargetMachine &TM);
}
#endif
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