llvm/lib/Target/WebAssembly/WebAssemblyTargetTransformInfo.h

   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   void getUnrollingPreferences(Loop *L, ScalarEvolution &SE,
  52                                TTI::UnrollingPreferences &UP,
  53                                OptimizationRemarkEmitter *ORE) const;
  54
  55   /// @}
  56
  57   /// \name Vector TTI Implementations
  58   /// @{
  59
  60   unsigned getNumberOfRegisters(unsigned ClassID) const;
  61   TypeSize getRegisterBitWidth(TargetTransformInfo::RegisterKind K) const;
  62   InstructionCost getArithmeticInstrCost(
  63       unsigned Opcode, Type *Ty,
  64       TTI::TargetCostKind CostKind = TTI::TCK_SizeAndLatency,
  65       TTI::OperandValueKind Opd1Info = TTI::OK_AnyValue,
  66       TTI::OperandValueKind Opd2Info = TTI::OK_AnyValue,
  67       TTI::OperandValueProperties Opd1PropInfo = TTI::OP_None,
  68       TTI::OperandValueProperties Opd2PropInfo = TTI::OP_None,
  69       ArrayRef<const Value *> Args = ArrayRef<const Value *>(),
  70       const Instruction *CxtI = nullptr);
  71   InstructionCost getVectorInstrCost(unsigned Opcode, Type *Val,
  72                                      unsigned Index);
  73
  74   /// @}
  75
  76   bool areInlineCompatible(const Function *Caller,
  77                            const Function *Callee) const;
  78 };
  79
  80 } // end namespace llvm
  81
  82 #endif