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