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 20 using namespace llvm; 21 22 23 // Pin the vtable to this file. 24 void NVPTXSubtarget::anchor() {} 25 26 NVPTXSubtarget::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