1//===-- HexagonTargetTransformInfo.cpp - Hexagon specific TTI pass --------===//
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/// \file
9/// This file implements a TargetTransformInfo analysis pass specific to the
10/// Hexagon target machine. It uses the target's detailed information to provide
11/// more precise answers to certain TTI queries, while letting the target
12/// independent and default TTI implementations handle the rest.
13///
14//===----------------------------------------------------------------------===//
15
16#ifndef LLVM_LIB_TARGET_HEXAGON_HEXAGONTARGETTRANSFORMINFO_H
17#define LLVM_LIB_TARGET_HEXAGON_HEXAGONTARGETTRANSFORMINFO_H
18
19#include "Hexagon.h"
20#include "HexagonTargetMachine.h"
21#include "llvm/Analysis/TargetTransformInfo.h"
22#include "llvm/CodeGen/BasicTTIImpl.h"
23#include "llvm/Target/TargetLowering.h"
24
25namespace llvm {
26
27class HexagonTTIImpl : public BasicTTIImplBase<HexagonTTIImpl> {
28  typedef BasicTTIImplBase<HexagonTTIImpl> BaseT;
29  typedef TargetTransformInfo TTI;
30  friend BaseT;
31
32  const HexagonSubtarget *ST;
33  const HexagonTargetLowering *TLI;
34
35  const HexagonSubtarget *getST() const { return ST; }
36  const HexagonTargetLowering *getTLI() const { return TLI; }
37
38public:
39  explicit HexagonTTIImpl(const HexagonTargetMachine *TM, const Function &F)
40      : BaseT(TM, F.getParent()->getDataLayout()), ST(TM->getSubtargetImpl(F)),
41        TLI(ST->getTargetLowering()) {}
42
43  // Provide value semantics. MSVC requires that we spell all of these out.
44  HexagonTTIImpl(const HexagonTTIImpl &Arg)
45      : BaseT(static_cast<const BaseT &>(Arg)), ST(Arg.ST), TLI(Arg.TLI) {}
46  HexagonTTIImpl(HexagonTTIImpl &&Arg)
47      : BaseT(std::move(static_cast<BaseT &>(Arg))), ST(std::move(Arg.ST)),
48        TLI(std::move(Arg.TLI)) {}
49
50  /// \name Scalar TTI Implementations
51  /// @{
52
53  TTI::PopcntSupportKind getPopcntSupport(unsigned IntTyWidthInBit) const;
54
55  // The Hexagon target can unroll loops with run-time trip counts.
56  void getUnrollingPreferences(Loop *L, TTI::UnrollingPreferences &UP);
57
58  /// @}
59
60  /// \name Vector TTI Implementations
61  /// @{
62
63  unsigned getNumberOfRegisters(bool vector) const;
64
65  /// @}
66};
67
68} // end namespace llvm
69
70#endif
71