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 // Select Driver Interface 23 #include "llvm/Support/CommandLine.h" 24 namespace { 25 cl::opt<NVPTX::DrvInterface> 26 DriverInterface(cl::desc("Choose driver interface:"), 27 cl::values( 28 clEnumValN(NVPTX::NVCL, "drvnvcl", "Nvidia OpenCL driver"), 29 clEnumValN(NVPTX::CUDA, "drvcuda", "Nvidia CUDA driver"), 30 clEnumValN(NVPTX::TEST, "drvtest", "Plain Test"), 31 clEnumValEnd), 32 cl::init(NVPTX::NVCL)); 33 } 34 35 NVPTXSubtarget::NVPTXSubtarget(const std::string &TT, const std::string &CPU, 36 const std::string &FS, bool is64Bit) 37 : NVPTXGenSubtargetInfo(TT, CPU, FS), 38 Is64Bit(is64Bit), 39 PTXVersion(0), 40 SmVersion(10) { 41 42 drvInterface = DriverInterface; 43 44 // Provide the default CPU if none 45 std::string defCPU = "sm_10"; 46 47 ParseSubtargetFeatures((CPU.empty() ? defCPU : CPU), FS); 48 49 // Get the TargetName from the FS if available 50 if (FS.empty() && CPU.empty()) 51 TargetName = defCPU; 52 else if (!CPU.empty()) 53 TargetName = CPU; 54 else 55 llvm_unreachable("we are not using FeatureStr"); 56 57 // We default to PTX 3.1, but we cannot just default to it in the initializer 58 // since the attribute parser checks if the given option is >= the default. 59 // So if we set ptx31 as the default, the ptx30 attribute would never match. 60 // Instead, we use 0 as the default and manually set 31 if the default is 61 // used. 62 if (PTXVersion == 0) { 63 PTXVersion = 31; 64 } 65 } 66
