- // Generate a new alias...
- auto *PTy = cast<PointerType>(GEP->getType());
- GlobalAlias::create(PTy, Linkage, Name, GEP, &M);
+ // When the linkage is not internal we must emit an alias for the original
+ // variable name as it may be accessed from another object. On non-Mach-O
+ // we can also emit an alias for internal linkage as it's safe to do so.
+ // It's not safe on Mach-O as the alias (and thus the portion of the
+ // MergedGlobals variable) may be dead stripped at link time.
+ if (Linkage != GlobalValue::InternalLinkage ||
+ !TM->getTargetTriple().isOSBinFormatMachO()) {
+ GlobalAlias::create(Tys[idx], AddrSpace, Linkage, Name, GEP, &M);
+ }