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#define GET_SUBTARGETINFO_ENUM
16#define GET_SUBTARGETINFO_TARGET_DESC
17#define GET_SUBTARGETINFO_CTOR
18#include "NVPTXGenSubtargetInfo.inc"
19
20using namespace llvm;
21
22
23// Pin the vtable to this file.
24void NVPTXSubtarget::anchor() {}
25
26NVPTXSubtarget::NVPTXSubtarget(const std::string &TT, const std::string &CPU,
27                               const std::string &FS, bool is64Bit)
28    : NVPTXGenSubtargetInfo(TT, CPU, FS), Is64Bit(is64Bit), PTXVersion(0),
29      SmVersion(20) {
30
31  Triple T(TT);
32
33  if (T.getOS() == Triple::NVCL)
34    drvInterface = NVPTX::NVCL;
35  else
36    drvInterface = NVPTX::CUDA;
37
38  // Provide the default CPU if none
39  std::string defCPU = "sm_20";
40
41  ParseSubtargetFeatures((CPU.empty() ? defCPU : CPU), FS);
42
43  // Get the TargetName from the FS if available
44  if (FS.empty() && CPU.empty())
45    TargetName = defCPU;
46  else if (!CPU.empty())
47    TargetName = CPU;
48  else
49    llvm_unreachable("we are not using FeatureStr");
50
51  // We default to PTX 3.1, but we cannot just default to it in the initializer
52  // since the attribute parser checks if the given option is >= the default.
53  // So if we set ptx31 as the default, the ptx30 attribute would never match.
54  // Instead, we use 0 as the default and manually set 31 if the default is
55  // used.
56  if (PTXVersion == 0) {
57    PTXVersion = 31;
58  }
59}
60