1 //===-- TargetMachine.cpp -------------------------------------------------===// 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 // This file implements the LLVM-C part of TargetMachine.h 10 // 11 //===----------------------------------------------------------------------===// 12 13 #include "llvm-c/Core.h" 14 #include "llvm-c/Target.h" 15 #include "llvm-c/TargetMachine.h" 16 #include "llvm/Analysis/TargetTransformInfo.h" 17 #include "llvm/IR/DataLayout.h" 18 #include "llvm/IR/LegacyPassManager.h" 19 #include "llvm/IR/Module.h" 20 #include "llvm/MC/SubtargetFeature.h" 21 #include "llvm/MC/TargetRegistry.h" 22 #include "llvm/Support/FileSystem.h" 23 #include "llvm/Support/FormattedStream.h" 24 #include "llvm/Support/Host.h" 25 #include "llvm/Support/raw_ostream.h" 26 #include "llvm/Target/CodeGenCWrappers.h" 27 #include "llvm/Target/TargetMachine.h" 28 #include <cassert> 29 #include <cstdlib> 30 #include <cstring> 31 32 using namespace llvm; 33 34 static TargetMachine *unwrap(LLVMTargetMachineRef P) { 35 return reinterpret_cast<TargetMachine *>(P); 36 } 37 static Target *unwrap(LLVMTargetRef P) { 38 return reinterpret_cast<Target*>(P); 39 } 40 static LLVMTargetMachineRef wrap(const TargetMachine *P) { 41 return reinterpret_cast<LLVMTargetMachineRef>(const_cast<TargetMachine *>(P)); 42 } 43 static LLVMTargetRef wrap(const Target * P) { 44 return reinterpret_cast<LLVMTargetRef>(const_cast<Target*>(P)); 45 } 46 47 LLVMTargetRef LLVMGetFirstTarget() { 48 if (TargetRegistry::targets().begin() == TargetRegistry::targets().end()) { 49 return nullptr; 50 } 51 52 const Target *target = &*TargetRegistry::targets().begin(); 53 return wrap(target); 54 } 55 LLVMTargetRef LLVMGetNextTarget(LLVMTargetRef T) { 56 return wrap(unwrap(T)->getNext()); 57 } 58 59 LLVMTargetRef LLVMGetTargetFromName(const char *Name) { 60 StringRef NameRef = Name; 61 auto I = find_if(TargetRegistry::targets(), 62 [&](const Target &T) { return T.getName() == NameRef; }); 63 return I != TargetRegistry::targets().end() ? wrap(&*I) : nullptr; 64 } 65 66 LLVMBool LLVMGetTargetFromTriple(const char* TripleStr, LLVMTargetRef *T, 67 char **ErrorMessage) { 68 std::string Error; 69 70 *T = wrap(TargetRegistry::lookupTarget(TripleStr, Error)); 71 72 if (!*T) { 73 if (ErrorMessage) 74 *ErrorMessage = strdup(Error.c_str()); 75 76 return 1; 77 } 78 79 return 0; 80 } 81 82 const char * LLVMGetTargetName(LLVMTargetRef T) { 83 return unwrap(T)->getName(); 84 } 85 86 const char * LLVMGetTargetDescription(LLVMTargetRef T) { 87 return unwrap(T)->getShortDescription(); 88 } 89 90 LLVMBool LLVMTargetHasJIT(LLVMTargetRef T) { 91 return unwrap(T)->hasJIT(); 92 } 93 94 LLVMBool LLVMTargetHasTargetMachine(LLVMTargetRef T) { 95 return unwrap(T)->hasTargetMachine(); 96 } 97 98 LLVMBool LLVMTargetHasAsmBackend(LLVMTargetRef T) { 99 return unwrap(T)->hasMCAsmBackend(); 100 } 101 102 LLVMTargetMachineRef LLVMCreateTargetMachine(LLVMTargetRef T, 103 const char *Triple, const char *CPU, const char *Features, 104 LLVMCodeGenOptLevel Level, LLVMRelocMode Reloc, 105 LLVMCodeModel CodeModel) { 106 Optional<Reloc::Model> RM; 107 switch (Reloc){ 108 case LLVMRelocStatic: 109 RM = Reloc::Static; 110 break; 111 case LLVMRelocPIC: 112 RM = Reloc::PIC_; 113 break; 114 case LLVMRelocDynamicNoPic: 115 RM = Reloc::DynamicNoPIC; 116 break; 117 case LLVMRelocROPI: 118 RM = Reloc::ROPI; 119 break; 120 case LLVMRelocRWPI: 121 RM = Reloc::RWPI; 122 break; 123 case LLVMRelocROPI_RWPI: 124 RM = Reloc::ROPI_RWPI; 125 break; 126 default: 127 break; 128 } 129 130 bool JIT; 131 Optional<CodeModel::Model> CM = unwrap(CodeModel, JIT); 132 133 CodeGenOpt::Level OL; 134 switch (Level) { 135 case LLVMCodeGenLevelNone: 136 OL = CodeGenOpt::None; 137 break; 138 case LLVMCodeGenLevelLess: 139 OL = CodeGenOpt::Less; 140 break; 141 case LLVMCodeGenLevelAggressive: 142 OL = CodeGenOpt::Aggressive; 143 break; 144 default: 145 OL = CodeGenOpt::Default; 146 break; 147 } 148 149 TargetOptions opt; 150 return wrap(unwrap(T)->createTargetMachine(Triple, CPU, Features, opt, RM, CM, 151 OL, JIT)); 152 } 153 154 void LLVMDisposeTargetMachine(LLVMTargetMachineRef T) { delete unwrap(T); } 155 156 LLVMTargetRef LLVMGetTargetMachineTarget(LLVMTargetMachineRef T) { 157 const Target* target = &(unwrap(T)->getTarget()); 158 return wrap(target); 159 } 160 161 char* LLVMGetTargetMachineTriple(LLVMTargetMachineRef T) { 162 std::string StringRep = unwrap(T)->getTargetTriple().str(); 163 return strdup(StringRep.c_str()); 164 } 165 166 char* LLVMGetTargetMachineCPU(LLVMTargetMachineRef T) { 167 std::string StringRep = std::string(unwrap(T)->getTargetCPU()); 168 return strdup(StringRep.c_str()); 169 } 170 171 char* LLVMGetTargetMachineFeatureString(LLVMTargetMachineRef T) { 172 std::string StringRep = std::string(unwrap(T)->getTargetFeatureString()); 173 return strdup(StringRep.c_str()); 174 } 175 176 void LLVMSetTargetMachineAsmVerbosity(LLVMTargetMachineRef T, 177 LLVMBool VerboseAsm) { 178 unwrap(T)->Options.MCOptions.AsmVerbose = VerboseAsm; 179 } 180 181 LLVMTargetDataRef LLVMCreateTargetDataLayout(LLVMTargetMachineRef T) { 182 return wrap(new DataLayout(unwrap(T)->createDataLayout())); 183 } 184 185 static LLVMBool LLVMTargetMachineEmit(LLVMTargetMachineRef T, LLVMModuleRef M, 186 raw_pwrite_stream &OS, 187 LLVMCodeGenFileType codegen, 188 char **ErrorMessage) { 189 TargetMachine* TM = unwrap(T); 190 Module* Mod = unwrap(M); 191 192 legacy::PassManager pass; 193 194 std::string error; 195 196 Mod->setDataLayout(TM->createDataLayout()); 197 198 CodeGenFileType ft; 199 switch (codegen) { 200 case LLVMAssemblyFile: 201 ft = CGFT_AssemblyFile; 202 break; 203 default: 204 ft = CGFT_ObjectFile; 205 break; 206 } 207 if (TM->addPassesToEmitFile(pass, OS, nullptr, ft)) { 208 error = "TargetMachine can't emit a file of this type"; 209 *ErrorMessage = strdup(error.c_str()); 210 return true; 211 } 212 213 pass.run(*Mod); 214 215 OS.flush(); 216 return false; 217 } 218 219 LLVMBool LLVMTargetMachineEmitToFile(LLVMTargetMachineRef T, LLVMModuleRef M, 220 char* Filename, LLVMCodeGenFileType codegen, char** ErrorMessage) { 221 std::error_code EC; 222 raw_fd_ostream dest(Filename, EC, sys::fs::OF_None); 223 if (EC) { 224 *ErrorMessage = strdup(EC.message().c_str()); 225 return true; 226 } 227 bool Result = LLVMTargetMachineEmit(T, M, dest, codegen, ErrorMessage); 228 dest.flush(); 229 return Result; 230 } 231 232 LLVMBool LLVMTargetMachineEmitToMemoryBuffer(LLVMTargetMachineRef T, 233 LLVMModuleRef M, LLVMCodeGenFileType codegen, char** ErrorMessage, 234 LLVMMemoryBufferRef *OutMemBuf) { 235 SmallString<0> CodeString; 236 raw_svector_ostream OStream(CodeString); 237 bool Result = LLVMTargetMachineEmit(T, M, OStream, codegen, ErrorMessage); 238 239 StringRef Data = OStream.str(); 240 *OutMemBuf = 241 LLVMCreateMemoryBufferWithMemoryRangeCopy(Data.data(), Data.size(), ""); 242 return Result; 243 } 244 245 char *LLVMGetDefaultTargetTriple(void) { 246 return strdup(sys::getDefaultTargetTriple().c_str()); 247 } 248 249 char *LLVMNormalizeTargetTriple(const char* triple) { 250 return strdup(Triple::normalize(StringRef(triple)).c_str()); 251 } 252 253 char *LLVMGetHostCPUName(void) { 254 return strdup(sys::getHostCPUName().data()); 255 } 256 257 char *LLVMGetHostCPUFeatures(void) { 258 SubtargetFeatures Features; 259 StringMap<bool> HostFeatures; 260 261 if (sys::getHostCPUFeatures(HostFeatures)) 262 for (auto &F : HostFeatures) 263 Features.AddFeature(F.first(), F.second); 264 265 return strdup(Features.getString().c_str()); 266 } 267 268 void LLVMAddAnalysisPasses(LLVMTargetMachineRef T, LLVMPassManagerRef PM) { 269 unwrap(PM)->add( 270 createTargetTransformInfoWrapperPass(unwrap(T)->getTargetIRAnalysis())); 271 } 272