56 // The optimal approach is to mix islands for distinations within two hops,  in isADRP()
65 // (2) new InputSection, which contains ...  in isADRP()
81 // * DenseMap<Symbol *, ThunkInfo> thunkMap: Maps the function symbol  in isADRP()
88 //   function: (a) thunk symbol, (b) input section containing stub code, and  in isADRP()
93 // * A thunk incarnation comprises (a) private-extern Defined symbol pointing  in isADRP()
109 //   thus, we place thunks at monotonically increasing addresses. Once a thunk  in isADRP()
116 DenseMap<Symbol *, ThunkInfo> lld::macho::thunkMap;  in isADRP()
120 // instructions, whereas CISC (i.e., x86) generally doesn't. RISC only needs  in isST1SinglePost()
124   if (!target->usesThunks())  in isST1SinglePost()
125     return false;  in isST1SinglePost()
132   for (InputSection *isec : inputs) {  in isST1SinglePost()
133     for (Reloc &r : isec->relocs) {  in isST1SinglePost()
136       auto *sym = r.referent.get<Symbol *>();  in isST1SinglePost()
142       // might need to create more for this referent at the time we are  in isST1SinglePost()
153 // Since __stubs is placed after __text, we must estimate the address
160   // Tally the non-stub functions which still have call sites  in isSTPPost()
166     maxPotentialThunks +=  in isSTPOffset()
167         !tp.first->isInStubs() && ti.callSitesUsed < ti.callSiteCount;  in isSTPOffset()
173     isecEnd = alignTo(isecEnd, isec->align) + isec->getSize();  in isSTPPre()
177   uint64_t stubsInRangeVA = isecEnd + maxPotentialThunks * target->thunkSize +  in isSTP()
184       ", tail = " + to_hexString(isecEnd - isecVA) +  in isLoadStoreUnscaled()
191   uint64_t isecFileOff = fileOff;
197     isecAddr += isec->getSize();
202     for (ConcatInputSection *isec : inputs)  in isLoadStoreImmediatePre()
203       finalizeOne(isec);  in isLoadStoreImmediatePre()
209   uint64_t branchRange = target->branchRange;  in isLoadStoreRegisterOff()
210   uint64_t stubsInRangeVA = TargetInfo::outOfRangeVA;
215   size_t thunkCount = 0;
219   // Kick-off by ensuring that the first input section has an address  in getRt()
222     if (finalIdx == callIdx)  in getRn()
223       finalizeOne(inputs[finalIdx++]);  in getRn()
231     if (isec->callSiteCount == 0)  in isBranch()
232       continue;  in isBranch()
238       // sits in the middle of a loop, this code executes only once.  in isV8SingleRegisterNonStructureLoadStore()
249                      [](Reloc &a, Reloc &b) { return a.offset > b.offset; }));  in isV8NonStructureLoad()
274       ++thunkInfo.thunkCallCount;  in hasWriteback()
275       ++thunkCallCount;
284       // ... otherwise, create a new thunk  in doesLoadStoreWriteToReg()