1 files changed, 70 insertions, 0 deletions
diff --git a/third_party/llvm-project/include/llvm/Support/Host.h b/third_party/llvm-project/include/llvm/Support/Host.h
new file mode 100644
index 000000000..44f543c36
--- /dev/null
+++ b/third_party/llvm-project/include/llvm/Support/Host.h
@@ -0,0 +1,70 @@
+//===- 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 <string>
+
+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<bool> &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