forked from OSchip/llvm-project
82 lines
2.4 KiB
C++
82 lines
2.4 KiB
C++
//==- HexagonTargetTransformInfo.cpp - Hexagon specific TTI pass -*- C++ -*-==//
|
|
//
|
|
// 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 "HexagonSubtarget.h"
|
|
#include "HexagonTargetMachine.h"
|
|
#include "llvm/ADT/ArrayRef.h"
|
|
#include "llvm/Analysis/TargetTransformInfo.h"
|
|
#include "llvm/CodeGen/BasicTTIImpl.h"
|
|
#include "llvm/IR/Function.h"
|
|
|
|
namespace llvm {
|
|
|
|
class Loop;
|
|
class ScalarEvolution;
|
|
class User;
|
|
class Value;
|
|
|
|
class HexagonTTIImpl : public BasicTTIImplBase<HexagonTTIImpl> {
|
|
using BaseT = BasicTTIImplBase<HexagonTTIImpl>;
|
|
using TTI = TargetTransformInfo;
|
|
|
|
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 // LLVM_LIB_TARGET_HEXAGON_HEXAGONTARGETTRANSFORMINFO_H
|