WebAssemblyTargetTransformInfo.h revision 321369 
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  /// \name Scalar TTI Implementations
46  /// @{
47
48  // TODO: Implement more Scalar TTI for WebAssembly
49
50  TTI::PopcntSupportKind getPopcntSupport(unsigned TyWidth) const;
51
52  /// @}
53
54  /// \name Vector TTI Implementations
55  /// @{
56
57  unsigned getNumberOfRegisters(bool Vector);
58  unsigned getRegisterBitWidth(bool Vector) const;
59  unsigned getArithmeticInstrCost(
60      unsigned Opcode, Type *Ty,
61      TTI::OperandValueKind Opd1Info = TTI::OK_AnyValue,
62      TTI::OperandValueKind Opd2Info = TTI::OK_AnyValue,
63      TTI::OperandValueProperties Opd1PropInfo = TTI::OP_None,
64      TTI::OperandValueProperties Opd2PropInfo = TTI::OP_None,
65      ArrayRef<const Value *> Args = ArrayRef<const Value *>());
66  unsigned getVectorInstrCost(unsigned Opcode, Type *Val, unsigned Index);
67
68  /// @}
69};
70
71} // end namespace llvm
72
73#endif
74