AMDGPUTargetTransformInfo.h revision 286684 
1//===-- AMDGPUTargetTransformInfo.h - AMDGPU specific TTI -------*- C++ -*-===//
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/// \file
10/// This file a TargetTransformInfo::Concept conforming object specific to the
11/// AMDGPU target machine. It uses the target's detailed information to
12/// provide more precise answers to certain TTI queries, while letting the
13/// target independent and default TTI implementations handle the rest.
14///
15//===----------------------------------------------------------------------===//
16
17#ifndef LLVM_LIB_TARGET_R600_AMDGPUTARGETTRANSFORMINFO_H
18#define LLVM_LIB_TARGET_R600_AMDGPUTARGETTRANSFORMINFO_H
19
20#include "AMDGPU.h"
21#include "AMDGPUTargetMachine.h"
22#include "llvm/Analysis/TargetTransformInfo.h"
23#include "llvm/CodeGen/BasicTTIImpl.h"
24#include "llvm/Target/TargetLowering.h"
25
26namespace llvm {
27
28class AMDGPUTTIImpl : public BasicTTIImplBase<AMDGPUTTIImpl> {
29  typedef BasicTTIImplBase<AMDGPUTTIImpl> BaseT;
30  typedef TargetTransformInfo TTI;
31  friend BaseT;
32
33  const AMDGPUSubtarget *ST;
34  const AMDGPUTargetLowering *TLI;
35
36  const AMDGPUSubtarget *getST() const { return ST; }
37  const AMDGPUTargetLowering *getTLI() const { return TLI; }
38
39public:
40  explicit AMDGPUTTIImpl(const AMDGPUTargetMachine *TM, const DataLayout &DL)
41      : BaseT(TM, DL), ST(TM->getSubtargetImpl()),
42        TLI(ST->getTargetLowering()) {}
43
44  // Provide value semantics. MSVC requires that we spell all of these out.
45  AMDGPUTTIImpl(const AMDGPUTTIImpl &Arg)
46      : BaseT(static_cast<const BaseT &>(Arg)), ST(Arg.ST), TLI(Arg.TLI) {}
47  AMDGPUTTIImpl(AMDGPUTTIImpl &&Arg)
48      : BaseT(std::move(static_cast<BaseT &>(Arg))), ST(std::move(Arg.ST)),
49        TLI(std::move(Arg.TLI)) {}
50
51  bool hasBranchDivergence() { return true; }
52
53  void getUnrollingPreferences(Loop *L, TTI::UnrollingPreferences &UP);
54
55  TTI::PopcntSupportKind getPopcntSupport(unsigned TyWidth) {
56    assert(isPowerOf2_32(TyWidth) && "Ty width must be power of 2");
57    return ST->hasBCNT(TyWidth) ? TTI::PSK_FastHardware : TTI::PSK_Software;
58  }
59
60  unsigned getNumberOfRegisters(bool Vector);
61  unsigned getRegisterBitWidth(bool Vector);
62  unsigned getMaxInterleaveFactor(unsigned VF);
63};
64
65} // end namespace llvm
66
67#endif
68