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 /// 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 
27 namespace llvm {
28 
29 class 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 
getST()37   const WebAssemblySubtarget *getST() const { return ST; }
getTLI()38   const WebAssemblyTargetLowering *getTLI() const { return TLI; }
39 
40 public:
WebAssemblyTTIImpl(const WebAssemblyTargetMachine * TM,const Function & F)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