LLVM  3.7.0
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 // Pin the vtable to this file.
27 void NVPTXSubtarget::anchor() {}
28 
30  StringRef FS) {
31  // Provide the default CPU if we don't have one.
32  if (CPU.empty() && FS.size())
33  llvm_unreachable("we are not using FeatureStr");
34  TargetName = CPU.empty() ? "sm_20" : CPU;
35 
36  ParseSubtargetFeatures(TargetName, FS);
37 
38  // Set default to PTX 3.2 (CUDA 5.5)
39  if (PTXVersion == 0) {
40  PTXVersion = 32;
41  }
42 
43  return *this;
44 }
45 
46 NVPTXSubtarget::NVPTXSubtarget(const Triple &TT, const std::string &CPU,
47  const std::string &FS,
48  const NVPTXTargetMachine &TM)
49  : NVPTXGenSubtargetInfo(TT, CPU, FS), PTXVersion(0), SmVersion(20), TM(TM),
50  InstrInfo(), TLInfo(TM, initializeSubtargetDependencies(CPU, FS)),
51  FrameLowering() {}
52 
54  // Enable handles for Kepler+, where CUDA supports indirect surfaces and
55  // textures
56  if (TM.getDrvInterface() == NVPTX::CUDA)
57  return (SmVersion >= 30);
58 
59  // Disabled, otherwise
60  return false;
61 }
size_t size() const
size - Get the string size.
Definition: StringRef.h:113
void ParseSubtargetFeatures(StringRef CPU, StringRef FS)
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.
#define llvm_unreachable(msg)
Marks that the current location is not supposed to be reachable.
Definition: ErrorHandling.h:98
Triple - Helper class for working with autoconf configuration names.
Definition: Triple.h:44
NVPTXTargetMachine.
bool hasImageHandles() const
NVPTXSubtarget & initializeSubtargetDependencies(StringRef CPU, StringRef FS)
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:40
NVPTX::DrvInterface getDrvInterface() const
bool empty() const
empty - Check if the string is empty.
Definition: StringRef.h:110