LLVM  4.0.0
NVPTXTargetTransformInfo.h
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1 //===-- NVPTXTargetTransformInfo.h - NVPTX specific TTI ---------*- C++ -*-===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 /// \file
10 /// This file a TargetTransformInfo::Concept conforming object specific to the
11 /// NVPTX target machine. It uses the target's detailed information to
12 /// provide more precise answers to certain TTI queries, while letting the
13 /// target independent and default TTI implementations handle the rest.
14 ///
15 //===----------------------------------------------------------------------===//
16 
17 #ifndef LLVM_LIB_TARGET_NVPTX_NVPTXTARGETTRANSFORMINFO_H
18 #define LLVM_LIB_TARGET_NVPTX_NVPTXTARGETTRANSFORMINFO_H
19 
20 #include "NVPTX.h"
21 #include "NVPTXTargetMachine.h"
25 
26 namespace llvm {
27 
28 class NVPTXTTIImpl : public BasicTTIImplBase<NVPTXTTIImpl> {
30  typedef TargetTransformInfo TTI;
31  friend BaseT;
32 
33  const NVPTXSubtarget *ST;
34  const NVPTXTargetLowering *TLI;
35 
36  const NVPTXSubtarget *getST() const { return ST; };
37  const NVPTXTargetLowering *getTLI() const { return TLI; };
38 
39 public:
40  explicit NVPTXTTIImpl(const NVPTXTargetMachine *TM, const Function &F)
41  : BaseT(TM, F.getParent()->getDataLayout()), ST(TM->getSubtargetImpl()),
42  TLI(ST->getTargetLowering()) {}
43 
44  bool hasBranchDivergence() { return true; }
45 
46  bool isSourceOfDivergence(const Value *V);
47 
48  // Increase the inlining cost threshold by a factor of 5, reflecting that
49  // calls are particularly expensive in NVPTX.
50  unsigned getInliningThresholdMultiplier() { return 5; }
51 
53  unsigned Opcode, Type *Ty,
59 
60  void getUnrollingPreferences(Loop *L, TTI::UnrollingPreferences &UP);
61 };
62 
63 } // end namespace llvm
64 
65 #endif
MachineLoop * L
NVPTXTTIImpl(const NVPTXTargetMachine *TM, const Function &F)
Base class which can be used to help build a TTI implementation.
Definition: BasicTTIImpl.h:40
#define F(x, y, z)
Definition: MD5.cpp:51
int 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, ArrayRef< const Value * > Args=ArrayRef< const Value * >())
void getUnrollingPreferences(Loop *L, TTI::UnrollingPreferences &UP)
ArrayRef - Represent a constant reference to an array (0 or more elements consecutively in memory)...
Definition: APInt.h:33
The instances of the Type class are immutable: once they are created, they are never changed...
Definition: Type.h:45
bool isSourceOfDivergence(const Value *V)
This file provides a helper that implements much of the TTI interface in terms of the target-independ...
OperandValueProperties
Additional properties of an operand's values.
unsigned getInliningThresholdMultiplier()
This pass provides access to the codegen interfaces that are needed for IR-level transformations.
const DataLayout & getDataLayout() const
NVPTXTargetMachine.
Represents a single loop in the control flow graph.
Definition: LoopInfo.h:368
LLVM Value Representation.
Definition: Value.h:71
static const Function * getParent(const Value *V)
OperandValueKind
Additional information about an operand's possible values.
This pass exposes codegen information to IR-level passes.
This file describes how to lower LLVM code to machine code.