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bdc1c0106b
Works on this dependency chain: ArrayRef.h -> Hashing.h -> --CUT-- Host.h -> StringMap.h / StringRef.h ArrayRef is very popular, but Host.h is rarely needed. Move the IsBigEndianHost constant to SwapByteOrder.h. Clients of that header are more likely to need it. llvm-svn: 375316
71 lines
2.6 KiB
C++
71 lines
2.6 KiB
C++
//===- llvm/Support/Host.h - Host machine characteristics --------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// Methods for querying the nature of the host machine.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_SUPPORT_HOST_H
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#define LLVM_SUPPORT_HOST_H
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#include "llvm/ADT/StringMap.h"
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#include <string>
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namespace llvm {
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namespace sys {
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/// getDefaultTargetTriple() - Return the default target triple the compiler
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/// has been configured to produce code for.
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///
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/// The target triple is a string in the format of:
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/// CPU_TYPE-VENDOR-OPERATING_SYSTEM
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/// or
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/// CPU_TYPE-VENDOR-KERNEL-OPERATING_SYSTEM
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std::string getDefaultTargetTriple();
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/// getProcessTriple() - Return an appropriate target triple for generating
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/// code to be loaded into the current process, e.g. when using the JIT.
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std::string getProcessTriple();
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/// getHostCPUName - Get the LLVM name for the host CPU. The particular format
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/// of the name is target dependent, and suitable for passing as -mcpu to the
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/// target which matches the host.
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///
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/// \return - The host CPU name, or empty if the CPU could not be determined.
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StringRef getHostCPUName();
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/// getHostCPUFeatures - Get the LLVM names for the host CPU features.
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/// The particular format of the names are target dependent, and suitable for
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/// passing as -mattr to the target which matches the host.
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///
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/// \param Features - A string mapping feature names to either
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/// true (if enabled) or false (if disabled). This routine makes no guarantees
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/// about exactly which features may appear in this map, except that they are
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/// all valid LLVM feature names.
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///
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/// \return - True on success.
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bool getHostCPUFeatures(StringMap<bool> &Features);
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/// Get the number of physical cores (as opposed to logical cores returned
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/// from thread::hardware_concurrency(), which includes hyperthreads).
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/// Returns -1 if unknown for the current host system.
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int getHostNumPhysicalCores();
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namespace detail {
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/// Helper functions to extract HostCPUName from /proc/cpuinfo on linux.
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StringRef getHostCPUNameForPowerPC(StringRef ProcCpuinfoContent);
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StringRef getHostCPUNameForARM(StringRef ProcCpuinfoContent);
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StringRef getHostCPUNameForS390x(StringRef ProcCpuinfoContent);
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StringRef getHostCPUNameForBPF();
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}
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}
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}
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#endif
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