1 //===-- HexagonTargetTransformInfo.cpp - Hexagon specific TTI pass --------===// 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 /// \file 9 /// This file implements a TargetTransformInfo analysis pass specific to the 10 /// Hexagon target machine. It uses the target's detailed information to provide 11 /// more precise answers to certain TTI queries, while letting the target 12 /// independent and default TTI implementations handle the rest. 13 /// 14 //===----------------------------------------------------------------------===// 15 16 #ifndef LLVM_LIB_TARGET_HEXAGON_HEXAGONTARGETTRANSFORMINFO_H 17 #define LLVM_LIB_TARGET_HEXAGON_HEXAGONTARGETTRANSFORMINFO_H 18 19 #include "Hexagon.h" 20 #include "HexagonTargetMachine.h" 21 #include "llvm/Analysis/TargetTransformInfo.h" 22 #include "llvm/CodeGen/BasicTTIImpl.h" 23 #include "llvm/Target/TargetLowering.h" 24 25 namespace llvm { 26 27 class HexagonTTIImpl : public BasicTTIImplBase<HexagonTTIImpl> { 28 typedef BasicTTIImplBase<HexagonTTIImpl> BaseT; 29 typedef TargetTransformInfo TTI; 30 friend BaseT; 31 32 const HexagonSubtarget *ST; 33 const HexagonTargetLowering *TLI; 34 35 const HexagonSubtarget *getST() const { return ST; } 36 const HexagonTargetLowering *getTLI() const { return TLI; } 37 38 public: 39 explicit HexagonTTIImpl(const HexagonTargetMachine *TM, const Function &F) 40 : BaseT(TM, F.getParent()->getDataLayout()), ST(TM->getSubtargetImpl(F)), 41 TLI(ST->getTargetLowering()) {} 42 43 // Provide value semantics. MSVC requires that we spell all of these out. 44 HexagonTTIImpl(const HexagonTTIImpl &Arg) 45 : BaseT(static_cast<const BaseT &>(Arg)), ST(Arg.ST), TLI(Arg.TLI) {} 46 HexagonTTIImpl(HexagonTTIImpl &&Arg) 47 : BaseT(std::move(static_cast<BaseT &>(Arg))), ST(std::move(Arg.ST)), 48 TLI(std::move(Arg.TLI)) {} 49 50 /// \name Scalar TTI Implementations 51 /// @{ 52 53 TTI::PopcntSupportKind getPopcntSupport(unsigned IntTyWidthInBit) const; 54 55 // The Hexagon target can unroll loops with run-time trip counts. 56 void getUnrollingPreferences(Loop *L, TTI::UnrollingPreferences &UP); 57 58 /// @} 59 60 /// \name Vector TTI Implementations 61 /// @{ 62 63 unsigned getNumberOfRegisters(bool vector) const; 64 65 /// @} 66 }; 67 68 } // end namespace llvm 69 70 #endif 71
