path: root/lib/Target/Hexagon/HexagonISelDAGToDAG.cpp

//===-- HexagonISelDAGToDAG.cpp - A dag to dag inst selector for Hexagon --===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines an instruction selector for the Hexagon target.
//
//===----------------------------------------------------------------------===//

#define DEBUG_TYPE "hexagon-isel"
#include "HexagonISelLowering.h"
#include "HexagonTargetMachine.h"
#include "llvm/Intrinsics.h"
#include "llvm/CodeGen/SelectionDAGISel.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/Debug.h"

using namespace llvm;


//===----------------------------------------------------------------------===//
// Instruction Selector Implementation
//===----------------------------------------------------------------------===//

//===--------------------------------------------------------------------===//
/// HexagonDAGToDAGISel - Hexagon specific code to select Hexagon machine
/// instructions for SelectionDAG operations.
///
namespace {
class HexagonDAGToDAGISel : public SelectionDAGISel {
  /// Subtarget - Keep a pointer to the Hexagon Subtarget around so that we can
  /// make the right decision when generating code for different targets.
  const HexagonSubtarget &Subtarget;

  // Keep a reference to HexagonTargetMachine.
  HexagonTargetMachine& TM;
  const HexagonInstrInfo *TII;