LLVM  8.0.1
NVPTXSubtarget.cpp
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1 //===- NVPTXSubtarget.cpp - NVPTX Subtarget Information -------------------===//
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 //
10 // This file implements the NVPTX specific subclass of TargetSubtarget.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #include "NVPTXSubtarget.h"
15 #include "NVPTXTargetMachine.h"
16 
17 using namespace llvm;
18 
19 #define DEBUG_TYPE "nvptx-subtarget"
20 
21 #define GET_SUBTARGETINFO_ENUM
22 #define GET_SUBTARGETINFO_TARGET_DESC
23 #define GET_SUBTARGETINFO_CTOR
24 #include "NVPTXGenSubtargetInfo.inc"
25 
26 static cl::opt<bool>
27  NoF16Math("nvptx-no-f16-math", cl::ZeroOrMore, cl::Hidden,
28  cl::desc("NVPTX Specific: Disable generation of f16 math ops."),
29  cl::init(false));
30 
31 // Pin the vtable to this file.
32 void NVPTXSubtarget::anchor() {}
33 
35  StringRef FS) {
36  // Provide the default CPU if we don't have one.
37  TargetName = CPU.empty() ? "sm_20" : CPU;
38 
39  ParseSubtargetFeatures(TargetName, FS);
40 
41  // Set default to PTX 3.2 (CUDA 5.5)
42  if (PTXVersion == 0) {
43  PTXVersion = 32;
44  }
45 
46  return *this;
47 }
48 
49 NVPTXSubtarget::NVPTXSubtarget(const Triple &TT, const std::string &CPU,
50  const std::string &FS,
51  const NVPTXTargetMachine &TM)
52  : NVPTXGenSubtargetInfo(TT, CPU, FS), PTXVersion(0), SmVersion(20), TM(TM),
53  InstrInfo(), TLInfo(TM, initializeSubtargetDependencies(CPU, FS)),
54  FrameLowering() {}
55 
57  // Enable handles for Kepler+, where CUDA supports indirect surfaces and
58  // textures
59  if (TM.getDrvInterface() == NVPTX::CUDA)
60  return (SmVersion >= 30);
61 
62  // Disabled, otherwise
63  return false;
64 }
65 
67  return hasFP16Math() && NoF16Math == false;
68 }
This class represents lattice values for constants.
Definition: AllocatorList.h:24
void ParseSubtargetFeatures(StringRef CPU, StringRef FS)
bool hasImageHandles() const
NVPTXSubtarget(const Triple &TT, const std::string &CPU, const std::string &FS, const NVPTXTargetMachine &TM)
This constructor initializes the data members to match that of the specified module.
static cl::opt< bool > NoF16Math("nvptx-no-f16-math", cl::ZeroOrMore, cl::Hidden, cl::desc("NVPTX Specific: Disable generation of f16 math ops."), cl::init(false))
LLVM_NODISCARD LLVM_ATTRIBUTE_ALWAYS_INLINE bool empty() const
empty - Check if the string is empty.
Definition: StringRef.h:133
initializer< Ty > init(const Ty &Val)
Definition: CommandLine.h:423
bool hasFP16Math() const
NVPTX::DrvInterface getDrvInterface() const
Triple - Helper class for working with autoconf configuration names.
Definition: Triple.h:44
NVPTXTargetMachine.
bool allowFP16Math() const
NVPTXSubtarget & initializeSubtargetDependencies(StringRef CPU, StringRef FS)
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:49