1 //===--- Types.cpp - Driver input & temporary type information ------------===//
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 #include "clang/Driver/Types.h"
10 #include "clang/Driver/Driver.h"
11 #include "clang/Driver/DriverDiagnostic.h"
12 #include "clang/Driver/Options.h"
13 #include "llvm/ADT/STLExtras.h"
14 #include "llvm/ADT/SmallVector.h"
15 #include "llvm/ADT/StringSwitch.h"
16 #include "llvm/Option/Arg.h"
17 #include <cassert>
18 #include <cstring>
19 
20 using namespace clang::driver;
21 using namespace clang::driver::types;
22 
23 struct TypeInfo {
24   const char *Name;
25   const char *TempSuffix;
26   ID PreprocessedType;
27   const llvm::SmallVector<phases::ID, phases::MaxNumberOfPhases> Phases;
28 };
29 
30 static const TypeInfo TypeInfos[] = {
31 #define TYPE(NAME, ID, PP_TYPE, TEMP_SUFFIX, ...) \
32   { NAME, TEMP_SUFFIX, TY_##PP_TYPE, { __VA_ARGS__ }, },
33 #include "clang/Driver/Types.def"
34 #undef TYPE
35 };
36 static const unsigned numTypes = llvm::array_lengthof(TypeInfos);
37 
38 static const TypeInfo &getInfo(unsigned id) {
39   assert(id > 0 && id - 1 < numTypes && "Invalid Type ID.");
40   return TypeInfos[id - 1];
41 }
42 
43 const char *types::getTypeName(ID Id) {
44   return getInfo(Id).Name;
45 }
46 
47 types::ID types::getPreprocessedType(ID Id) {
48   ID PPT = getInfo(Id).PreprocessedType;
49   assert((llvm::is_contained(getInfo(Id).Phases, phases::Preprocess) !=
50           (PPT == TY_INVALID)) &&
51          "Unexpected Preprocess Type.");
52   return PPT;
53 }
54 
55 static bool isPrepeocessedModuleType(ID Id) {
56   return Id == TY_CXXModule || Id == TY_PP_CXXModule;
57 }
58 
59 types::ID types::getPrecompiledType(ID Id) {
60   if (isPrepeocessedModuleType(Id))
61     return TY_ModuleFile;
62   if (onlyPrecompileType(Id))
63     return TY_PCH;
64   return TY_INVALID;
65 }
66 
67 const char *types::getTypeTempSuffix(ID Id, bool CLMode) {
68   if (CLMode) {
69     switch (Id) {
70     case TY_Object:
71     case TY_LTO_BC:
72       return "obj";
73     case TY_Image:
74       return "exe";
75     case TY_PP_Asm:
76       return "asm";
77     default:
78       break;
79     }
80   }
81   return getInfo(Id).TempSuffix;
82 }
83 
84 bool types::onlyAssembleType(ID Id) {
85   return llvm::is_contained(getInfo(Id).Phases, phases::Assemble) &&
86          !llvm::is_contained(getInfo(Id).Phases, phases::Compile) &&
87          !llvm::is_contained(getInfo(Id).Phases, phases::Backend);
88 }
89 
90 bool types::onlyPrecompileType(ID Id) {
91   return llvm::is_contained(getInfo(Id).Phases, phases::Precompile) &&
92          !isPrepeocessedModuleType(Id);
93 }
94 
95 bool types::canTypeBeUserSpecified(ID Id) {
96   static const clang::driver::types::ID kStaticLangageTypes[] = {
97       TY_CUDA_DEVICE,   TY_HIP_DEVICE,    TY_PP_CHeader,
98       TY_PP_ObjCHeader, TY_PP_CXXHeader,  TY_PP_ObjCXXHeader,
99       TY_PP_CXXModule,  TY_LTO_IR,        TY_LTO_BC,
100       TY_Plist,         TY_RewrittenObjC, TY_RewrittenLegacyObjC,
101       TY_Remap,         TY_PCH,           TY_Object,
102       TY_Image,         TY_dSYM,          TY_Dependencies,
103       TY_CUDA_FATBIN,   TY_HIP_FATBIN};
104   return !llvm::is_contained(kStaticLangageTypes, Id);
105 }
106 
107 bool types::appendSuffixForType(ID Id) {
108   return Id == TY_PCH || Id == TY_dSYM || Id == TY_CUDA_FATBIN ||
109          Id == TY_HIP_FATBIN;
110 }
111 
112 bool types::canLipoType(ID Id) {
113   return (Id == TY_Nothing ||
114           Id == TY_Image ||
115           Id == TY_Object ||
116           Id == TY_LTO_BC);
117 }
118 
119 bool types::isAcceptedByClang(ID Id) {
120   switch (Id) {
121   default:
122     return false;
123 
124   case TY_Asm:
125   case TY_C: case TY_PP_C:
126   case TY_CL:
127   case TY_CUDA: case TY_PP_CUDA:
128   case TY_CUDA_DEVICE:
129   case TY_HIP:
130   case TY_PP_HIP:
131   case TY_HIP_DEVICE:
132   case TY_ObjC: case TY_PP_ObjC: case TY_PP_ObjC_Alias:
133   case TY_CXX: case TY_PP_CXX:
134   case TY_ObjCXX: case TY_PP_ObjCXX: case TY_PP_ObjCXX_Alias:
135   case TY_CHeader: case TY_PP_CHeader:
136   case TY_CLHeader:
137   case TY_ObjCHeader: case TY_PP_ObjCHeader:
138   case TY_CXXHeader: case TY_PP_CXXHeader:
139   case TY_ObjCXXHeader: case TY_PP_ObjCXXHeader:
140   case TY_CXXModule: case TY_PP_CXXModule:
141   case TY_AST: case TY_ModuleFile:
142   case TY_LLVM_IR: case TY_LLVM_BC:
143     return true;
144   }
145 }
146 
147 bool types::isObjC(ID Id) {
148   switch (Id) {
149   default:
150     return false;
151 
152   case TY_ObjC: case TY_PP_ObjC: case TY_PP_ObjC_Alias:
153   case TY_ObjCXX: case TY_PP_ObjCXX:
154   case TY_ObjCHeader: case TY_PP_ObjCHeader:
155   case TY_ObjCXXHeader: case TY_PP_ObjCXXHeader: case TY_PP_ObjCXX_Alias:
156     return true;
157   }
158 }
159 
160 bool types::isCXX(ID Id) {
161   switch (Id) {
162   default:
163     return false;
164 
165   case TY_CXX: case TY_PP_CXX:
166   case TY_ObjCXX: case TY_PP_ObjCXX: case TY_PP_ObjCXX_Alias:
167   case TY_CXXHeader: case TY_PP_CXXHeader:
168   case TY_ObjCXXHeader: case TY_PP_ObjCXXHeader:
169   case TY_CXXModule: case TY_PP_CXXModule:
170   case TY_CUDA: case TY_PP_CUDA: case TY_CUDA_DEVICE:
171   case TY_HIP:
172   case TY_PP_HIP:
173   case TY_HIP_DEVICE:
174     return true;
175   }
176 }
177 
178 bool types::isLLVMIR(ID Id) {
179   switch (Id) {
180   default:
181     return false;
182 
183   case TY_LLVM_IR:
184   case TY_LLVM_BC:
185   case TY_LTO_IR:
186   case TY_LTO_BC:
187     return true;
188   }
189 }
190 
191 bool types::isCuda(ID Id) {
192   switch (Id) {
193   default:
194     return false;
195 
196   case TY_CUDA:
197   case TY_PP_CUDA:
198   case TY_CUDA_DEVICE:
199     return true;
200   }
201 }
202 
203 bool types::isHIP(ID Id) {
204   switch (Id) {
205   default:
206     return false;
207 
208   case TY_HIP:
209   case TY_PP_HIP:
210   case TY_HIP_DEVICE:
211     return true;
212   }
213 }
214 
215 bool types::isSrcFile(ID Id) {
216   return Id != TY_Object && getPreprocessedType(Id) != TY_INVALID;
217 }
218 
219 types::ID types::lookupTypeForExtension(llvm::StringRef Ext) {
220   return llvm::StringSwitch<types::ID>(Ext)
221            .Case("c", TY_C)
222            .Case("C", TY_CXX)
223            .Case("F", TY_Fortran)
224            .Case("f", TY_PP_Fortran)
225            .Case("h", TY_CHeader)
226            .Case("H", TY_CXXHeader)
227            .Case("i", TY_PP_C)
228            .Case("m", TY_ObjC)
229            .Case("M", TY_ObjCXX)
230            .Case("o", TY_Object)
231            .Case("S", TY_Asm)
232            .Case("s", TY_PP_Asm)
233            .Case("bc", TY_LLVM_BC)
234            .Case("cc", TY_CXX)
235            .Case("CC", TY_CXX)
236            .Case("cl", TY_CL)
237            .Case("cp", TY_CXX)
238            .Case("cu", TY_CUDA)
239            .Case("hh", TY_CXXHeader)
240            .Case("ii", TY_PP_CXX)
241            .Case("ll", TY_LLVM_IR)
242            .Case("mi", TY_PP_ObjC)
243            .Case("mm", TY_ObjCXX)
244            .Case("rs", TY_RenderScript)
245            .Case("adb", TY_Ada)
246            .Case("ads", TY_Ada)
247            .Case("asm", TY_PP_Asm)
248            .Case("ast", TY_AST)
249            .Case("ccm", TY_CXXModule)
250            .Case("cpp", TY_CXX)
251            .Case("CPP", TY_CXX)
252            .Case("c++", TY_CXX)
253            .Case("C++", TY_CXX)
254            .Case("cui", TY_PP_CUDA)
255            .Case("cxx", TY_CXX)
256            .Case("CXX", TY_CXX)
257            .Case("F90", TY_Fortran)
258            .Case("f90", TY_PP_Fortran)
259            .Case("F95", TY_Fortran)
260            .Case("f95", TY_PP_Fortran)
261            .Case("for", TY_PP_Fortran)
262            .Case("FOR", TY_PP_Fortran)
263            .Case("fpp", TY_Fortran)
264            .Case("FPP", TY_Fortran)
265            .Case("gch", TY_PCH)
266            .Case("hip", TY_HIP)
267            .Case("hpp", TY_CXXHeader)
268            .Case("iim", TY_PP_CXXModule)
269            .Case("lib", TY_Object)
270            .Case("mii", TY_PP_ObjCXX)
271            .Case("obj", TY_Object)
272            .Case("pch", TY_PCH)
273            .Case("pcm", TY_ModuleFile)
274            .Case("c++m", TY_CXXModule)
275            .Case("cppm", TY_CXXModule)
276            .Case("cxxm", TY_CXXModule)
277            .Default(TY_INVALID);
278 }
279 
280 types::ID types::lookupTypeForTypeSpecifier(const char *Name) {
281   for (unsigned i=0; i<numTypes; ++i) {
282     types::ID Id = (types::ID) (i + 1);
283     if (canTypeBeUserSpecified(Id) &&
284         strcmp(Name, getInfo(Id).Name) == 0)
285       return Id;
286   }
287 
288   return TY_INVALID;
289 }
290 
291 // FIXME: Why don't we just put this list in the defs file, eh.
292 // FIXME: The list is now in Types.def but for now this function will verify
293 //        the old behavior and a subsequent change will delete most of the body.
294 void types::getCompilationPhases(ID Id, llvm::SmallVectorImpl<phases::ID> &P) {
295   P = getInfo(Id).Phases;
296   assert(0 < P.size() && "Not enough phases in list");
297   assert(P.size() <= phases::MaxNumberOfPhases && "Too many phases in list");
298 }
299 
300 void types::getCompilationPhases(const clang::driver::Driver &Driver,
301                                  llvm::opt::DerivedArgList &DAL, ID Id,
302                                  llvm::SmallVectorImpl<phases::ID> &P) {
303   llvm::SmallVector<phases::ID, phases::MaxNumberOfPhases> PhaseList;
304   types::getCompilationPhases(Id, PhaseList);
305 
306   // Filter to compiler mode. When the compiler is run as a preprocessor then
307   // compilation is not an option.
308   // -S runs the compiler in Assembly listing mode.
309   if (Driver.CCCIsCPP() || DAL.getLastArg(options::OPT_E) ||
310       DAL.getLastArg(options::OPT__SLASH_EP) ||
311       DAL.getLastArg(options::OPT_M, options::OPT_MM) ||
312       DAL.getLastArg(options::OPT__SLASH_P))
313     llvm::copy_if(PhaseList, std::back_inserter(P),
314                   [](phases::ID Phase) { return Phase <= phases::Preprocess; });
315 
316   // --precompile only runs up to precompilation.
317   // This is a clang extension and is not compatible with GCC.
318   else if (DAL.getLastArg(options::OPT__precompile))
319     llvm::copy_if(PhaseList, std::back_inserter(P),
320                   [](phases::ID Phase) { return Phase <= phases::Precompile; });
321 
322   // -{fsyntax-only,-analyze,emit-ast} only run up to the compiler.
323   else if (DAL.getLastArg(options::OPT_fsyntax_only) ||
324            DAL.getLastArg(options::OPT_print_supported_cpus) ||
325            DAL.getLastArg(options::OPT_module_file_info) ||
326            DAL.getLastArg(options::OPT_verify_pch) ||
327            DAL.getLastArg(options::OPT_rewrite_objc) ||
328            DAL.getLastArg(options::OPT_rewrite_legacy_objc) ||
329            DAL.getLastArg(options::OPT__migrate) ||
330            DAL.getLastArg(options::OPT_emit_iterface_stubs) ||
331            DAL.getLastArg(options::OPT__analyze, options::OPT__analyze_auto) ||
332            DAL.getLastArg(options::OPT_emit_ast))
333     llvm::copy_if(PhaseList, std::back_inserter(P),
334                   [](phases::ID Phase) { return Phase <= phases::Compile; });
335 
336   else if (DAL.getLastArg(options::OPT_S) ||
337            DAL.getLastArg(options::OPT_emit_llvm))
338     llvm::copy_if(PhaseList, std::back_inserter(P),
339                   [](phases::ID Phase) { return Phase <= phases::Backend; });
340 
341   else if (DAL.getLastArg(options::OPT_c))
342     llvm::copy_if(PhaseList, std::back_inserter(P),
343                   [](phases::ID Phase) { return Phase <= phases::Assemble; });
344 
345   // Generally means, do every phase until Link.
346   else
347     P = PhaseList;
348 }
349 
350 ID types::lookupCXXTypeForCType(ID Id) {
351   switch (Id) {
352   default:
353     return Id;
354 
355   case types::TY_C:
356     return types::TY_CXX;
357   case types::TY_PP_C:
358     return types::TY_PP_CXX;
359   case types::TY_CHeader:
360     return types::TY_CXXHeader;
361   case types::TY_PP_CHeader:
362     return types::TY_PP_CXXHeader;
363   }
364 }
365 
366 ID types::lookupHeaderTypeForSourceType(ID Id) {
367   switch (Id) {
368   default:
369     return Id;
370 
371   // FIXME: Handle preprocessed input types.
372   case types::TY_C:
373     return types::TY_CHeader;
374   case types::TY_CXX:
375   case types::TY_CXXModule:
376     return types::TY_CXXHeader;
377   case types::TY_ObjC:
378     return types::TY_ObjCHeader;
379   case types::TY_ObjCXX:
380     return types::TY_ObjCXXHeader;
381   case types::TY_CL:
382     return types::TY_CLHeader;
383   }
384 }
385