1//==- WebAssemblyTargetTransformInfo.h - WebAssembly-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///
10/// \file
11/// \brief This file a TargetTransformInfo::Concept conforming object specific
12/// to the WebAssembly target machine.
13///
14/// It uses the target's detailed information to provide more precise answers to
15/// certain TTI queries, while letting the target independent and default TTI
16/// implementations handle the rest.
17///
18//===----------------------------------------------------------------------===//
19
20#ifndef LLVM_LIB_TARGET_WEBASSEMBLY_WEBASSEMBLYTARGETTRANSFORMINFO_H
21#define LLVM_LIB_TARGET_WEBASSEMBLY_WEBASSEMBLYTARGETTRANSFORMINFO_H
22
23#include "WebAssemblyTargetMachine.h"
24#include "llvm/CodeGen/BasicTTIImpl.h"
25#include <algorithm>
26
27namespace llvm {
28
29class WebAssemblyTTIImpl final : public BasicTTIImplBase<WebAssemblyTTIImpl> {
30  typedef BasicTTIImplBase<WebAssemblyTTIImpl> BaseT;
31  typedef TargetTransformInfo TTI;
32  friend BaseT;
33
34  const WebAssemblySubtarget *ST;
35  const WebAssemblyTargetLowering *TLI;
36
37  const WebAssemblySubtarget *getST() const { return ST; }
38  const WebAssemblyTargetLowering *getTLI() const { return TLI; }
39
40public:
41  WebAssemblyTTIImpl(const WebAssemblyTargetMachine *TM, const Function &F)
42      : BaseT(TM, F.getParent()->getDataLayout()), ST(TM->getSubtargetImpl(F)),
43        TLI(ST->getTargetLowering()) {}
44
45  // Provide value semantics. MSVC requires that we spell all of these out.
46  WebAssemblyTTIImpl(const WebAssemblyTTIImpl &Arg)
47      : BaseT(static_cast<const BaseT &>(Arg)), ST(Arg.ST), TLI(Arg.TLI) {}
48  WebAssemblyTTIImpl(WebAssemblyTTIImpl &&Arg)
49      : BaseT(std::move(static_cast<BaseT &>(Arg))), ST(std::move(Arg.ST)),
50        TLI(std::move(Arg.TLI)) {}
51
52  /// \name Scalar TTI Implementations
53  /// @{
54
55  // TODO: Implement more Scalar TTI for WebAssembly
56
57  TTI::PopcntSupportKind getPopcntSupport(unsigned TyWidth) const;
58
59  /// @}
60
61  /// \name Vector TTI Implementations
62  /// @{
63
64  // TODO: Implement Vector TTI for WebAssembly
65
66  /// @}
67};
68
69} // end namespace llvm
70
71#endif
72