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87 lines
2.9 KiB
C++
87 lines
2.9 KiB
C++
//===-- NVPTXTargetTransformInfo.h - NVPTX specific TTI ---------*- 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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//===----------------------------------------------------------------------===//
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/// \file
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/// This file a TargetTransformInfo::Concept conforming object specific to the
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/// NVPTX target machine. It uses the target's detailed information to
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/// provide more precise answers to certain TTI queries, while letting the
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/// target independent and default TTI implementations handle the rest.
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///
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_TARGET_NVPTX_NVPTXTARGETTRANSFORMINFO_H
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#define LLVM_LIB_TARGET_NVPTX_NVPTXTARGETTRANSFORMINFO_H
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#include "NVPTX.h"
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#include "NVPTXTargetMachine.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/CodeGen/TargetLowering.h"
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namespace llvm {
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class NVPTXTTIImpl : public BasicTTIImplBase<NVPTXTTIImpl> {
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typedef BasicTTIImplBase<NVPTXTTIImpl> BaseT;
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typedef TargetTransformInfo TTI;
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friend BaseT;
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const NVPTXSubtarget *ST;
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const NVPTXTargetLowering *TLI;
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const NVPTXSubtarget *getST() const { return ST; };
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const NVPTXTargetLowering *getTLI() const { return TLI; };
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public:
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explicit NVPTXTTIImpl(const NVPTXTargetMachine *TM, const Function &F)
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: BaseT(TM, F.getParent()->getDataLayout()), ST(TM->getSubtargetImpl()),
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TLI(ST->getTargetLowering()) {}
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bool hasBranchDivergence() { return true; }
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bool isSourceOfDivergence(const Value *V);
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unsigned getFlatAddressSpace() const {
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return AddressSpace::ADDRESS_SPACE_GENERIC;
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}
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// Increase the inlining cost threshold by a factor of 5, reflecting that
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// calls are particularly expensive in NVPTX.
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unsigned getInliningThresholdMultiplier() { return 5; }
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int getArithmeticInstrCost(
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unsigned Opcode, Type *Ty,
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TTI::OperandValueKind Opd1Info = TTI::OK_AnyValue,
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TTI::OperandValueKind Opd2Info = TTI::OK_AnyValue,
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TTI::OperandValueProperties Opd1PropInfo = TTI::OP_None,
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TTI::OperandValueProperties Opd2PropInfo = TTI::OP_None,
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ArrayRef<const Value *> Args = ArrayRef<const Value *>());
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void getUnrollingPreferences(Loop *L, ScalarEvolution &SE,
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TTI::UnrollingPreferences &UP);
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bool hasVolatileVariant(Instruction *I, unsigned AddrSpace) {
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// Volatile loads/stores are only supported for shared and global address
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// spaces, or for generic AS that maps to them.
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if (!(AddrSpace == llvm::ADDRESS_SPACE_GENERIC ||
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AddrSpace == llvm::ADDRESS_SPACE_GLOBAL ||
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AddrSpace == llvm::ADDRESS_SPACE_SHARED))
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return false;
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switch(I->getOpcode()){
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default:
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return false;
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case Instruction::Load:
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case Instruction::Store:
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return true;
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}
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}
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};
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} // end namespace llvm
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#endif
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