mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-13 04:30:23 +00:00
cac51be31f
The patch disabled unrolling in loop vectorization pass when VF==1 on x86 architecture, by setting MaxInterleaveFactor to 1. Unrolling in loop vectorization pass may introduce the cost of overflow check, memory boundary check and extra prologue/epilogue code when regular unroller will unroll the loop another time. Disable it when VF==1 remove the unnecessary cost on x86. The same can be done for other platforms after verifying interleaving/memory bound checking to be not perf critical on those platforms. Differential Revision: http://reviews.llvm.org/D9515 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@236613 91177308-0d34-0410-b5e6-96231b3b80d8
105 lines
3.7 KiB
C++
105 lines
3.7 KiB
C++
//===-- PPCTargetTransformInfo.h - PPC specific TTI -------------*- 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 a TargetTransformInfo::Concept conforming object specific to the
|
|
/// PPC 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_POWERPC_PPCTARGETTRANSFORMINFO_H
|
|
#define LLVM_LIB_TARGET_POWERPC_PPCTARGETTRANSFORMINFO_H
|
|
|
|
#include "PPC.h"
|
|
#include "PPCTargetMachine.h"
|
|
#include "llvm/Analysis/TargetTransformInfo.h"
|
|
#include "llvm/CodeGen/BasicTTIImpl.h"
|
|
#include "llvm/Target/TargetLowering.h"
|
|
|
|
namespace llvm {
|
|
|
|
class PPCTTIImpl : public BasicTTIImplBase<PPCTTIImpl> {
|
|
typedef BasicTTIImplBase<PPCTTIImpl> BaseT;
|
|
typedef TargetTransformInfo TTI;
|
|
friend BaseT;
|
|
|
|
const PPCSubtarget *ST;
|
|
const PPCTargetLowering *TLI;
|
|
|
|
const PPCSubtarget *getST() const { return ST; }
|
|
const PPCTargetLowering *getTLI() const { return TLI; }
|
|
|
|
public:
|
|
explicit PPCTTIImpl(const PPCTargetMachine *TM, Function &F)
|
|
: BaseT(TM), ST(TM->getSubtargetImpl(F)), TLI(ST->getTargetLowering()) {}
|
|
|
|
// Provide value semantics. MSVC requires that we spell all of these out.
|
|
PPCTTIImpl(const PPCTTIImpl &Arg)
|
|
: BaseT(static_cast<const BaseT &>(Arg)), ST(Arg.ST), TLI(Arg.TLI) {}
|
|
PPCTTIImpl(PPCTTIImpl &&Arg)
|
|
: BaseT(std::move(static_cast<BaseT &>(Arg))), ST(std::move(Arg.ST)),
|
|
TLI(std::move(Arg.TLI)) {}
|
|
PPCTTIImpl &operator=(const PPCTTIImpl &RHS) {
|
|
BaseT::operator=(static_cast<const BaseT &>(RHS));
|
|
ST = RHS.ST;
|
|
TLI = RHS.TLI;
|
|
return *this;
|
|
}
|
|
PPCTTIImpl &operator=(PPCTTIImpl &&RHS) {
|
|
BaseT::operator=(std::move(static_cast<BaseT &>(RHS)));
|
|
ST = std::move(RHS.ST);
|
|
TLI = std::move(RHS.TLI);
|
|
return *this;
|
|
}
|
|
|
|
/// \name Scalar TTI Implementations
|
|
/// @{
|
|
|
|
using BaseT::getIntImmCost;
|
|
unsigned getIntImmCost(const APInt &Imm, Type *Ty);
|
|
|
|
unsigned getIntImmCost(unsigned Opcode, unsigned Idx, const APInt &Imm,
|
|
Type *Ty);
|
|
unsigned getIntImmCost(Intrinsic::ID IID, unsigned Idx, const APInt &Imm,
|
|
Type *Ty);
|
|
|
|
TTI::PopcntSupportKind getPopcntSupport(unsigned TyWidth);
|
|
void getUnrollingPreferences(Loop *L, TTI::UnrollingPreferences &UP);
|
|
|
|
/// @}
|
|
|
|
/// \name Vector TTI Implementations
|
|
/// @{
|
|
|
|
bool enableAggressiveInterleaving(bool LoopHasReductions);
|
|
unsigned getNumberOfRegisters(bool Vector);
|
|
unsigned getRegisterBitWidth(bool Vector);
|
|
unsigned getMaxInterleaveFactor(unsigned VF);
|
|
unsigned getArithmeticInstrCost(
|
|
unsigned Opcode, Type *Ty,
|
|
TTI::OperandValueKind Opd1Info = TTI::OK_AnyValue,
|
|
TTI::OperandValueKind Opd2Info = TTI::OK_AnyValue,
|
|
TTI::OperandValueProperties Opd1PropInfo = TTI::OP_None,
|
|
TTI::OperandValueProperties Opd2PropInfo = TTI::OP_None);
|
|
unsigned getShuffleCost(TTI::ShuffleKind Kind, Type *Tp, int Index,
|
|
Type *SubTp);
|
|
unsigned getCastInstrCost(unsigned Opcode, Type *Dst, Type *Src);
|
|
unsigned getCmpSelInstrCost(unsigned Opcode, Type *ValTy, Type *CondTy);
|
|
unsigned getVectorInstrCost(unsigned Opcode, Type *Val, unsigned Index);
|
|
unsigned getMemoryOpCost(unsigned Opcode, Type *Src, unsigned Alignment,
|
|
unsigned AddressSpace);
|
|
|
|
/// @}
|
|
};
|
|
|
|
} // end namespace llvm
|
|
|
|
#endif
|