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//===- NVPTXSubtarget.cpp - NVPTX Subtarget Information -------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements the NVPTX specific subclass of TargetSubtarget.
//
//===----------------------------------------------------------------------===//
#include "NVPTXSubtarget.h"
#define GET_SUBTARGETINFO_ENUM
#define GET_SUBTARGETINFO_TARGET_DESC
#define GET_SUBTARGETINFO_CTOR
#include "NVPTXGenSubtargetInfo.inc"
using namespace llvm;
// Select Driver Interface
#include "llvm/Support/CommandLine.h"
namespace {
cl::opt<NVPTX::DrvInterface> DriverInterface(
cl::desc("Choose driver interface:"),
cl::values(clEnumValN(NVPTX::NVCL, "drvnvcl", "Nvidia OpenCL driver"),
clEnumValN(NVPTX::CUDA, "drvcuda", "Nvidia CUDA driver"),
clEnumValN(NVPTX::TEST, "drvtest", "Plain Test"), clEnumValEnd),
cl::init(NVPTX::NVCL));
}
NVPTXSubtarget::NVPTXSubtarget(const std::string &TT, const std::string &CPU,
const std::string &FS, bool is64Bit)
: NVPTXGenSubtargetInfo(TT, CPU, FS), Is64Bit(is64Bit), PTXVersion(0),
SmVersion(20) {
drvInterface = DriverInterface;
// Provide the default CPU if none
std::string defCPU = "sm_20";
ParseSubtargetFeatures((CPU.empty() ? defCPU : CPU), FS);
// Get the TargetName from the FS if available
if (FS.empty() && CPU.empty())
TargetName = defCPU;
else if (!CPU.empty())
TargetName = CPU;
else
llvm_unreachable("we are not using FeatureStr");
// We default to PTX 3.1, but we cannot just default to it in the initializer
// since the attribute parser checks if the given option is >= the default.
// So if we set ptx31 as the default, the ptx30 attribute would never match.
// Instead, we use 0 as the default and manually set 31 if the default is
// used.
if (PTXVersion == 0) {
PTXVersion = 31;
}
}
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