1 //==- WebAssemblyTargetTransformInfo.h - WebAssembly-specific TTI -*- C++ -*-=//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 ///
9 /// \file
10 /// This file a TargetTransformInfo::Concept conforming object specific
11 /// to the WebAssembly target machine.
12 ///
13 /// It uses the target's detailed information to provide more precise answers to
14 /// certain TTI queries, while letting the target independent and default TTI
15 /// implementations handle the rest.
16 ///
17 //===----------------------------------------------------------------------===//
18 
19 #ifndef LLVM_LIB_TARGET_WEBASSEMBLY_WEBASSEMBLYTARGETTRANSFORMINFO_H
20 #define LLVM_LIB_TARGET_WEBASSEMBLY_WEBASSEMBLYTARGETTRANSFORMINFO_H
21 
22 #include "WebAssemblyTargetMachine.h"
23 #include "llvm/CodeGen/BasicTTIImpl.h"
24 #include <algorithm>
25 
26 namespace llvm {
27 
28 class WebAssemblyTTIImpl final : public BasicTTIImplBase<WebAssemblyTTIImpl> {
29   typedef BasicTTIImplBase<WebAssemblyTTIImpl> BaseT;
30   typedef TargetTransformInfo TTI;
31   friend BaseT;
32 
33   const WebAssemblySubtarget *ST;
34   const WebAssemblyTargetLowering *TLI;
35 
36   const WebAssemblySubtarget *getST() const { return ST; }
37   const WebAssemblyTargetLowering *getTLI() const { return TLI; }
38 
39 public:
40   WebAssemblyTTIImpl(const WebAssemblyTargetMachine *TM, const Function &F)
41       : BaseT(TM, F.getParent()->getDataLayout()), ST(TM->getSubtargetImpl(F)),
42         TLI(ST->getTargetLowering()) {}
43 
44   /// \name Scalar TTI Implementations
45   /// @{
46 
47   // TODO: Implement more Scalar TTI for WebAssembly
48 
49   TTI::PopcntSupportKind getPopcntSupport(unsigned TyWidth) const;
50 
51   /// @}
52 
53   /// \name Vector TTI Implementations
54   /// @{
55 
56   unsigned getNumberOfRegisters(unsigned ClassID) const;
57   unsigned getRegisterBitWidth(bool Vector) const;
58   unsigned getArithmeticInstrCost(
59       unsigned Opcode, Type *Ty,
60       TTI::OperandValueKind Opd1Info = TTI::OK_AnyValue,
61       TTI::OperandValueKind Opd2Info = TTI::OK_AnyValue,
62       TTI::OperandValueProperties Opd1PropInfo = TTI::OP_None,
63       TTI::OperandValueProperties Opd2PropInfo = TTI::OP_None,
64       ArrayRef<const Value *> Args = ArrayRef<const Value *>(),
65       const Instruction *CxtI = nullptr);
66   unsigned getVectorInstrCost(unsigned Opcode, Type *Val, unsigned Index);
67 
68   /// @}
69 };
70 
71 } // end namespace llvm
72 
73 #endif
74