//===- llvm/Support/Host.h - Host machine characteristics --------*- C++ -*-===// // // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. // See https://llvm.org/LICENSE.txt for license information. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception // //===----------------------------------------------------------------------===// // // Methods for querying the nature of the host machine. // //===----------------------------------------------------------------------===// #ifndef LLVM_SUPPORT_HOST_H #define LLVM_SUPPORT_HOST_H #include "llvm/ADT/StringMap.h" #include namespace llvm { namespace sys { /// getDefaultTargetTriple() - Return the default target triple the compiler /// has been configured to produce code for. /// /// The target triple is a string in the format of: /// CPU_TYPE-VENDOR-OPERATING_SYSTEM /// or /// CPU_TYPE-VENDOR-KERNEL-OPERATING_SYSTEM std::string getDefaultTargetTriple(); /// getProcessTriple() - Return an appropriate target triple for generating /// code to be loaded into the current process, e.g. when using the JIT. std::string getProcessTriple(); /// getHostCPUName - Get the LLVM name for the host CPU. The particular format /// of the name is target dependent, and suitable for passing as -mcpu to the /// target which matches the host. /// /// \return - The host CPU name, or empty if the CPU could not be determined. StringRef getHostCPUName(); /// getHostCPUFeatures - Get the LLVM names for the host CPU features. /// The particular format of the names are target dependent, and suitable for /// passing as -mattr to the target which matches the host. /// /// \param Features - A string mapping feature names to either /// true (if enabled) or false (if disabled). This routine makes no guarantees /// about exactly which features may appear in this map, except that they are /// all valid LLVM feature names. /// /// \return - True on success. bool getHostCPUFeatures(StringMap &Features); /// Get the number of physical cores (as opposed to logical cores returned /// from thread::hardware_concurrency(), which includes hyperthreads). /// Returns -1 if unknown for the current host system. int getHostNumPhysicalCores(); namespace detail { /// Helper functions to extract HostCPUName from /proc/cpuinfo on linux. StringRef getHostCPUNameForPowerPC(StringRef ProcCpuinfoContent); StringRef getHostCPUNameForARM(StringRef ProcCpuinfoContent); StringRef getHostCPUNameForS390x(StringRef ProcCpuinfoContent); StringRef getHostCPUNameForBPF(); } } } #endif