| //===-- HexagonTargetTransformInfo.cpp - Hexagon specific TTI pass --------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| /// \file |
| /// This file implements a TargetTransformInfo analysis pass specific to the |
| /// Hexagon target machine. It uses the target's detailed information to provide |
| /// more precise answers to certain TTI queries, while letting the target |
| /// independent and default TTI implementations handle the rest. |
| /// |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_LIB_TARGET_HEXAGON_HEXAGONTARGETTRANSFORMINFO_H |
| #define LLVM_LIB_TARGET_HEXAGON_HEXAGONTARGETTRANSFORMINFO_H |
| |
| #include "Hexagon.h" |
| #include "HexagonTargetMachine.h" |
| #include "llvm/Analysis/TargetTransformInfo.h" |
| #include "llvm/CodeGen/BasicTTIImpl.h" |
| #include "llvm/Target/TargetLowering.h" |
| |
| namespace llvm { |
| |
| class HexagonTTIImpl : public BasicTTIImplBase<HexagonTTIImpl> { |
| typedef BasicTTIImplBase<HexagonTTIImpl> BaseT; |
| typedef TargetTransformInfo TTI; |
| friend BaseT; |
| |
| const HexagonSubtarget *ST; |
| const HexagonTargetLowering *TLI; |
| |
| const HexagonSubtarget *getST() const { return ST; } |
| const HexagonTargetLowering *getTLI() const { return TLI; } |
| |
| public: |
| explicit HexagonTTIImpl(const HexagonTargetMachine *TM, const Function &F) |
| : BaseT(TM, F.getParent()->getDataLayout()), ST(TM->getSubtargetImpl(F)), |
| TLI(ST->getTargetLowering()) {} |
| |
| /// \name Scalar TTI Implementations |
| /// @{ |
| |
| TTI::PopcntSupportKind getPopcntSupport(unsigned IntTyWidthInBit) const; |
| |
| // The Hexagon target can unroll loops with run-time trip counts. |
| void getUnrollingPreferences(Loop *L, ScalarEvolution &SE, |
| TTI::UnrollingPreferences &UP); |
| |
| // L1 cache prefetch. |
| unsigned getPrefetchDistance() const; |
| unsigned getCacheLineSize() const; |
| |
| /// @} |
| |
| /// \name Vector TTI Implementations |
| /// @{ |
| |
| unsigned getNumberOfRegisters(bool vector) const; |
| |
| /// @} |
| |
| int getUserCost(const User *U, ArrayRef<const Value *> Operands); |
| |
| // Hexagon specific decision to generate a lookup table. |
| bool shouldBuildLookupTables() const; |
| }; |
| |
| } // end namespace llvm |
| |
| #endif |