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| 14 | pmbaty | 1 | //===- llvm/TargetParser/Host.h - Host machine detection -------*- C++ -*-===// |
| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | // |
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| 9 | // Methods for querying the nature of the host machine. |
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| 10 | // |
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| 11 | //===----------------------------------------------------------------------===// |
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| 12 | |||
| 13 | #ifndef LLVM_TARGETPARSER_HOST_H |
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| 14 | #define LLVM_TARGETPARSER_HOST_H |
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| 15 | |||
| 16 | #include <string> |
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| 17 | |||
| 18 | namespace llvm { |
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| 19 | class MallocAllocator; |
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| 20 | class StringRef; |
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| 21 | template <typename ValueTy, typename AllocatorTy> class StringMap; |
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| 22 | class raw_ostream; |
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| 23 | |||
| 24 | namespace sys { |
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| 25 | |||
| 26 | /// getDefaultTargetTriple() - Return the default target triple the compiler |
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| 27 | /// has been configured to produce code for. |
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| 28 | /// |
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| 29 | /// The target triple is a string in the format of: |
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| 30 | /// CPU_TYPE-VENDOR-OPERATING_SYSTEM |
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| 31 | /// or |
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| 32 | /// CPU_TYPE-VENDOR-KERNEL-OPERATING_SYSTEM |
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| 33 | std::string getDefaultTargetTriple(); |
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| 34 | |||
| 35 | /// getProcessTriple() - Return an appropriate target triple for generating |
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| 36 | /// code to be loaded into the current process, e.g. when using the JIT. |
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| 37 | std::string getProcessTriple(); |
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| 38 | |||
| 39 | /// getHostCPUName - Get the LLVM name for the host CPU. The particular format |
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| 40 | /// of the name is target dependent, and suitable for passing as -mcpu to the |
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| 41 | /// target which matches the host. |
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| 42 | /// |
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| 43 | /// \return - The host CPU name, or empty if the CPU could not be determined. |
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| 44 | StringRef getHostCPUName(); |
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| 45 | |||
| 46 | /// getHostCPUFeatures - Get the LLVM names for the host CPU features. |
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| 47 | /// The particular format of the names are target dependent, and suitable for |
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| 48 | /// passing as -mattr to the target which matches the host. |
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| 49 | /// |
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| 50 | /// \param Features - A string mapping feature names to either |
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| 51 | /// true (if enabled) or false (if disabled). This routine makes no guarantees |
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| 52 | /// about exactly which features may appear in this map, except that they are |
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| 53 | /// all valid LLVM feature names. |
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| 54 | /// |
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| 55 | /// \return - True on success. |
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| 56 | bool getHostCPUFeatures(StringMap<bool, MallocAllocator> &Features); |
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| 57 | |||
| 58 | /// This is a function compatible with cl::AddExtraVersionPrinter, which adds |
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| 59 | /// info about the current target triple and detected CPU. |
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| 60 | void printDefaultTargetAndDetectedCPU(raw_ostream &OS); |
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| 61 | |||
| 62 | namespace detail { |
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| 63 | /// Helper functions to extract HostCPUName from /proc/cpuinfo on linux. |
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| 64 | StringRef getHostCPUNameForPowerPC(StringRef ProcCpuinfoContent); |
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| 65 | StringRef getHostCPUNameForARM(StringRef ProcCpuinfoContent); |
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| 66 | StringRef getHostCPUNameForS390x(StringRef ProcCpuinfoContent); |
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| 67 | StringRef getHostCPUNameForRISCV(StringRef ProcCpuinfoContent); |
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| 68 | StringRef getHostCPUNameForSPARC(StringRef ProcCpuinfoContent); |
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| 69 | StringRef getHostCPUNameForBPF(); |
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| 70 | |||
| 71 | /// Helper functions to extract CPU details from CPUID on x86. |
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| 72 | namespace x86 { |
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| 73 | enum class VendorSignatures { |
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| 74 | UNKNOWN, |
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| 75 | GENUINE_INTEL, |
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| 76 | AUTHENTIC_AMD, |
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| 77 | }; |
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| 78 | |||
| 79 | /// Returns the host CPU's vendor. |
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| 80 | /// MaxLeaf: if a non-nullptr pointer is specified, the EAX value will be |
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| 81 | /// assigned to its pointee. |
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| 82 | VendorSignatures getVendorSignature(unsigned *MaxLeaf = nullptr); |
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| 83 | } // namespace x86 |
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| 84 | } |
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| 85 | } |
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| 86 | } |
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| 87 | |||
| 88 | #endif |