1 //===--- AMDGPU.h - AMDGPU ToolChain Implementations ----------*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #ifndef LLVM_CLANG_LIB_DRIVER_TOOLCHAINS_AMDGPU_H 10 #define LLVM_CLANG_LIB_DRIVER_TOOLCHAINS_AMDGPU_H 11 12 #include "Gnu.h" 13 #include "ROCm.h" 14 #include "clang/Basic/TargetID.h" 15 #include "clang/Driver/Options.h" 16 #include "clang/Driver/Tool.h" 17 #include "clang/Driver/ToolChain.h" 18 #include "llvm/ADT/SmallString.h" 19 #include "llvm/Support/TargetParser.h" 20 21 #include <map> 22 23 namespace clang { 24 namespace driver { 25 26 namespace tools { 27 namespace amdgpu { 28 29 class LLVM_LIBRARY_VISIBILITY Linker : public Tool { 30 public: 31 Linker(const ToolChain &TC) : Tool("amdgpu::Linker", "ld.lld", TC) {} 32 bool isLinkJob() const override { return true; } 33 bool hasIntegratedCPP() const override { return false; } 34 void ConstructJob(Compilation &C, const JobAction &JA, 35 const InputInfo &Output, const InputInfoList &Inputs, 36 const llvm::opt::ArgList &TCArgs, 37 const char *LinkingOutput) const override; 38 }; 39 40 void getAMDGPUTargetFeatures(const Driver &D, const llvm::Triple &Triple, 41 const llvm::opt::ArgList &Args, 42 std::vector<StringRef> &Features); 43 44 } // end namespace amdgpu 45 } // end namespace tools 46 47 namespace toolchains { 48 49 class LLVM_LIBRARY_VISIBILITY AMDGPUToolChain : public Generic_ELF { 50 protected: 51 const std::map<options::ID, const StringRef> OptionsDefault; 52 53 Tool *buildLinker() const override; 54 StringRef getOptionDefault(options::ID OptID) const { 55 auto opt = OptionsDefault.find(OptID); 56 assert(opt != OptionsDefault.end() && "No Default for Option"); 57 return opt->second; 58 } 59 60 public: 61 AMDGPUToolChain(const Driver &D, const llvm::Triple &Triple, 62 const llvm::opt::ArgList &Args); 63 unsigned GetDefaultDwarfVersion() const override { return 5; } 64 bool IsIntegratedAssemblerDefault() const override { return true; } 65 bool IsMathErrnoDefault() const override { return false; } 66 67 bool useIntegratedAs() const override { return true; } 68 bool isCrossCompiling() const override { return true; } 69 bool isPICDefault() const override { return false; } 70 bool isPIEDefault(const llvm::opt::ArgList &Args) const override { 71 return false; 72 } 73 bool isPICDefaultForced() const override { return false; } 74 bool SupportsProfiling() const override { return false; } 75 76 llvm::opt::DerivedArgList * 77 TranslateArgs(const llvm::opt::DerivedArgList &Args, StringRef BoundArch, 78 Action::OffloadKind DeviceOffloadKind) const override; 79 80 void addClangTargetOptions(const llvm::opt::ArgList &DriverArgs, 81 llvm::opt::ArgStringList &CC1Args, 82 Action::OffloadKind DeviceOffloadKind) const override; 83 84 /// Return whether denormals should be flushed, and treated as 0 by default 85 /// for the subtarget. 86 static bool getDefaultDenormsAreZeroForTarget(llvm::AMDGPU::GPUKind GPUKind); 87 88 llvm::DenormalMode getDefaultDenormalModeForType( 89 const llvm::opt::ArgList &DriverArgs, const JobAction &JA, 90 const llvm::fltSemantics *FPType = nullptr) const override; 91 92 static bool isWave64(const llvm::opt::ArgList &DriverArgs, 93 llvm::AMDGPU::GPUKind Kind); 94 /// Needed for using lto. 95 bool HasNativeLLVMSupport() const override { 96 return true; 97 } 98 99 /// Needed for translating LTO options. 100 const char *getDefaultLinker() const override { return "ld.lld"; } 101 102 /// Should skip argument. 103 bool shouldSkipArgument(const llvm::opt::Arg *Arg) const; 104 105 /// Uses amdgpu_arch tool to get arch of the system GPU. Will return error 106 /// if unable to find one. 107 llvm::Error getSystemGPUArch(const llvm::opt::ArgList &Args, 108 std::string &GPUArch) const; 109 110 protected: 111 /// Check and diagnose invalid target ID specified by -mcpu. 112 virtual void checkTargetID(const llvm::opt::ArgList &DriverArgs) const; 113 114 /// The struct type returned by getParsedTargetID. 115 struct ParsedTargetIDType { 116 Optional<std::string> OptionalTargetID; 117 Optional<std::string> OptionalGPUArch; 118 Optional<llvm::StringMap<bool>> OptionalFeatures; 119 }; 120 121 /// Get target ID, GPU arch, and target ID features if the target ID is 122 /// specified and valid. 123 ParsedTargetIDType 124 getParsedTargetID(const llvm::opt::ArgList &DriverArgs) const; 125 126 /// Get GPU arch from -mcpu without checking. 127 StringRef getGPUArch(const llvm::opt::ArgList &DriverArgs) const; 128 129 llvm::Error detectSystemGPUs(const llvm::opt::ArgList &Args, 130 SmallVector<std::string, 1> &GPUArchs) const; 131 }; 132 133 class LLVM_LIBRARY_VISIBILITY ROCMToolChain : public AMDGPUToolChain { 134 public: 135 ROCMToolChain(const Driver &D, const llvm::Triple &Triple, 136 const llvm::opt::ArgList &Args); 137 void 138 addClangTargetOptions(const llvm::opt::ArgList &DriverArgs, 139 llvm::opt::ArgStringList &CC1Args, 140 Action::OffloadKind DeviceOffloadKind) const override; 141 142 // Returns a list of device library names shared by different languages 143 llvm::SmallVector<std::string, 12> 144 getCommonDeviceLibNames(const llvm::opt::ArgList &DriverArgs, 145 const std::string &GPUArch) const; 146 }; 147 148 } // end namespace toolchains 149 } // end namespace driver 150 } // end namespace clang 151 152 #endif // LLVM_CLANG_LIB_DRIVER_TOOLCHAINS_AMDGPU_H 153