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.
anchor()27 void NVPTXSubtarget::anchor() {}
28
initializeSubtargetDependencies(StringRef CPU,StringRef FS)29 NVPTXSubtarget &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
NVPTXSubtarget(const Triple & TT,const std::string & CPU,const std::string & FS,const NVPTXTargetMachine & TM)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
hasImageHandles() const53 bool 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