1 //===--- ROCm.h - ROCm installation detector --------------------*- 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_ROCM_H
10 #define LLVM_CLANG_LIB_DRIVER_TOOLCHAINS_ROCM_H
11 
12 #include "clang/Basic/Cuda.h"
13 #include "clang/Basic/LLVM.h"
14 #include "clang/Driver/Driver.h"
15 #include "clang/Driver/Options.h"
16 #include "llvm/ADT/SmallString.h"
17 #include "llvm/ADT/StringMap.h"
18 #include "llvm/ADT/Triple.h"
19 #include "llvm/Option/ArgList.h"
20 #include "llvm/Support/VersionTuple.h"
21 
22 namespace clang {
23 namespace driver {
24 
25 /// ABI version of device library.
26 struct DeviceLibABIVersion {
27   unsigned ABIVersion = 0;
28   DeviceLibABIVersion(unsigned V) : ABIVersion(V) {}
29   static DeviceLibABIVersion fromCodeObjectVersion(unsigned CodeObjectVersion) {
30     if (CodeObjectVersion < 4)
31       CodeObjectVersion = 4;
32     return DeviceLibABIVersion(CodeObjectVersion * 100);
33   }
34   /// Whether ABI version bc file is requested.
35   /// ABIVersion is code object version multiplied by 100. Code object v4
36   /// and below works with ROCm 5.0 and below which does not have
37   /// abi_version_*.bc. Code object v5 requires abi_version_500.bc.
38   bool requiresLibrary() { return ABIVersion >= 500; }
39   std::string toString() {
40     assert(ABIVersion % 100 == 0 && "Not supported");
41     return Twine(ABIVersion / 100).str();
42   }
43 };
44 
45 /// A class to find a viable ROCM installation
46 /// TODO: Generalize to handle libclc.
47 class RocmInstallationDetector {
48 private:
49   struct ConditionalLibrary {
50     SmallString<0> On;
51     SmallString<0> Off;
52 
53     bool isValid() const { return !On.empty() && !Off.empty(); }
54 
55     StringRef get(bool Enabled) const {
56       assert(isValid());
57       return Enabled ? On : Off;
58     }
59   };
60 
61   // Installation path candidate.
62   struct Candidate {
63     llvm::SmallString<0> Path;
64     bool StrictChecking;
65     // Release string for ROCm packages built with SPACK if not empty. The
66     // installation directories of ROCm packages built with SPACK follow the
67     // convention <package_name>-<rocm_release_string>-<hash>.
68     std::string SPACKReleaseStr;
69 
70     bool isSPACK() const { return !SPACKReleaseStr.empty(); }
71     Candidate(std::string Path, bool StrictChecking = false,
72               StringRef SPACKReleaseStr = {})
73         : Path(Path), StrictChecking(StrictChecking),
74           SPACKReleaseStr(SPACKReleaseStr.str()) {}
75   };
76 
77   const Driver &D;
78   bool HasHIPRuntime = false;
79   bool HasDeviceLibrary = false;
80 
81   // Default version if not detected or specified.
82   const unsigned DefaultVersionMajor = 3;
83   const unsigned DefaultVersionMinor = 5;
84   const char *DefaultVersionPatch = "0";
85 
86   // The version string in Major.Minor.Patch format.
87   std::string DetectedVersion;
88   // Version containing major and minor.
89   llvm::VersionTuple VersionMajorMinor;
90   // Version containing patch.
91   std::string VersionPatch;
92 
93   // ROCm path specified by --rocm-path.
94   StringRef RocmPathArg;
95   // ROCm device library paths specified by --rocm-device-lib-path.
96   std::vector<std::string> RocmDeviceLibPathArg;
97   // HIP runtime path specified by --hip-path.
98   StringRef HIPPathArg;
99   // HIP version specified by --hip-version.
100   StringRef HIPVersionArg;
101   // Wheter -nogpulib is specified.
102   bool NoBuiltinLibs = false;
103 
104   // Paths
105   SmallString<0> InstallPath;
106   SmallString<0> BinPath;
107   SmallString<0> LibPath;
108   SmallString<0> LibDevicePath;
109   SmallString<0> IncludePath;
110   llvm::StringMap<std::string> LibDeviceMap;
111 
112   // Libraries that are always linked.
113   SmallString<0> OCML;
114   SmallString<0> OCKL;
115 
116   // Libraries that are always linked depending on the language
117   SmallString<0> OpenCL;
118   SmallString<0> HIP;
119 
120   // Asan runtime library
121   SmallString<0> AsanRTL;
122 
123   // Libraries swapped based on compile flags.
124   ConditionalLibrary WavefrontSize64;
125   ConditionalLibrary FiniteOnly;
126   ConditionalLibrary UnsafeMath;
127   ConditionalLibrary DenormalsAreZero;
128   ConditionalLibrary CorrectlyRoundedSqrt;
129 
130   // Maps ABI version to library path. The version number is in the format of
131   // three digits as used in the ABI version library name.
132   std::map<unsigned, std::string> ABIVersionMap;
133 
134   // Cache ROCm installation search paths.
135   SmallVector<Candidate, 4> ROCmSearchDirs;
136   bool PrintROCmSearchDirs;
137   bool Verbose;
138 
139   bool allGenericLibsValid() const {
140     return !OCML.empty() && !OCKL.empty() && !OpenCL.empty() && !HIP.empty() &&
141            WavefrontSize64.isValid() && FiniteOnly.isValid() &&
142            UnsafeMath.isValid() && DenormalsAreZero.isValid() &&
143            CorrectlyRoundedSqrt.isValid();
144   }
145 
146   void scanLibDevicePath(llvm::StringRef Path);
147   bool parseHIPVersionFile(llvm::StringRef V);
148   const SmallVectorImpl<Candidate> &getInstallationPathCandidates();
149 
150   /// Find the path to a SPACK package under the ROCm candidate installation
151   /// directory if the candidate is a SPACK ROCm candidate. \returns empty
152   /// string if the candidate is not SPACK ROCm candidate or the requested
153   /// package is not found.
154   llvm::SmallString<0> findSPACKPackage(const Candidate &Cand,
155                                         StringRef PackageName);
156 
157 public:
158   RocmInstallationDetector(const Driver &D, const llvm::Triple &HostTriple,
159                            const llvm::opt::ArgList &Args,
160                            bool DetectHIPRuntime = true,
161                            bool DetectDeviceLib = false);
162 
163   /// Get file paths of default bitcode libraries common to AMDGPU based
164   /// toolchains.
165   llvm::SmallVector<std::string, 12>
166   getCommonBitcodeLibs(const llvm::opt::ArgList &DriverArgs,
167                        StringRef LibDeviceFile, bool Wave64, bool DAZ,
168                        bool FiniteOnly, bool UnsafeMathOpt,
169                        bool FastRelaxedMath, bool CorrectSqrt,
170                        DeviceLibABIVersion ABIVer, bool isOpenMP) const;
171   /// Check file paths of default bitcode libraries common to AMDGPU based
172   /// toolchains. \returns false if there are invalid or missing files.
173   bool checkCommonBitcodeLibs(StringRef GPUArch, StringRef LibDeviceFile,
174                               DeviceLibABIVersion ABIVer) const;
175 
176   /// Check whether we detected a valid HIP runtime.
177   bool hasHIPRuntime() const { return HasHIPRuntime; }
178 
179   /// Check whether we detected a valid ROCm device library.
180   bool hasDeviceLibrary() const { return HasDeviceLibrary; }
181 
182   /// Print information about the detected ROCm installation.
183   void print(raw_ostream &OS) const;
184 
185   /// Get the detected Rocm install's version.
186   // RocmVersion version() const { return Version; }
187 
188   /// Get the detected Rocm installation path.
189   StringRef getInstallPath() const { return InstallPath; }
190 
191   /// Get the detected path to Rocm's bin directory.
192   // StringRef getBinPath() const { return BinPath; }
193 
194   /// Get the detected Rocm Include path.
195   StringRef getIncludePath() const { return IncludePath; }
196 
197   /// Get the detected Rocm library path.
198   StringRef getLibPath() const { return LibPath; }
199 
200   /// Get the detected Rocm device library path.
201   StringRef getLibDevicePath() const { return LibDevicePath; }
202 
203   StringRef getOCMLPath() const {
204     assert(!OCML.empty());
205     return OCML;
206   }
207 
208   StringRef getOCKLPath() const {
209     assert(!OCKL.empty());
210     return OCKL;
211   }
212 
213   StringRef getOpenCLPath() const {
214     assert(!OpenCL.empty());
215     return OpenCL;
216   }
217 
218   StringRef getHIPPath() const {
219     assert(!HIP.empty());
220     return HIP;
221   }
222 
223   /// Returns empty string of Asan runtime library is not available.
224   StringRef getAsanRTLPath() const { return AsanRTL; }
225 
226   StringRef getWavefrontSize64Path(bool Enabled) const {
227     return WavefrontSize64.get(Enabled);
228   }
229 
230   StringRef getFiniteOnlyPath(bool Enabled) const {
231     return FiniteOnly.get(Enabled);
232   }
233 
234   StringRef getUnsafeMathPath(bool Enabled) const {
235     return UnsafeMath.get(Enabled);
236   }
237 
238   StringRef getDenormalsAreZeroPath(bool Enabled) const {
239     return DenormalsAreZero.get(Enabled);
240   }
241 
242   StringRef getCorrectlyRoundedSqrtPath(bool Enabled) const {
243     return CorrectlyRoundedSqrt.get(Enabled);
244   }
245 
246   StringRef getABIVersionPath(DeviceLibABIVersion ABIVer) const {
247     auto Loc = ABIVersionMap.find(ABIVer.ABIVersion);
248     if (Loc == ABIVersionMap.end())
249       return StringRef();
250     return Loc->second;
251   }
252 
253   /// Get libdevice file for given architecture
254   std::string getLibDeviceFile(StringRef Gpu) const {
255     return LibDeviceMap.lookup(Gpu);
256   }
257 
258   void AddHIPIncludeArgs(const llvm::opt::ArgList &DriverArgs,
259                          llvm::opt::ArgStringList &CC1Args) const;
260 
261   void detectDeviceLibrary();
262   void detectHIPRuntime();
263 
264   /// Get the values for --rocm-device-lib-path arguments
265   std::vector<std::string> getRocmDeviceLibPathArg() const {
266     return RocmDeviceLibPathArg;
267   }
268 
269   /// Get the value for --rocm-path argument
270   StringRef getRocmPathArg() const { return RocmPathArg; }
271 
272   /// Get the value for --hip-version argument
273   StringRef getHIPVersionArg() const { return HIPVersionArg; }
274 
275   std::string getHIPVersion() const { return DetectedVersion; }
276 };
277 
278 } // end namespace driver
279 } // end namespace clang
280 
281 #endif // LLVM_CLANG_LIB_DRIVER_TOOLCHAINS_ROCM_H
282