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
17using 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.
27void NVPTXSubtarget::anchor() {}
28
29NVPTXSubtarget &NVPTXSubtarget::initializeSubtargetDependencies(StringRef CPU,
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
46NVPTXSubtarget::NVPTXSubtarget(const std::string &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      TSInfo(TM.getDataLayout()), FrameLowering() {}
52
53bool NVPTXSubtarget::hasImageHandles() const {
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}
62