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