Swift: Mangle function type lifetimes

Author: jketema

swift/extractor/mangler/SwiftMangler.cpp

@@ -225,6 +225,40 @@ SwiftMangledName SwiftMangler::visitAnyFunctionType(const swift::AnyFunctionType
       ret << "...";
     }
   }
+
+  if (type->hasLifetimeDependencies()) {
+    for (const auto& lifetime : type->getLifetimeDependencies()) {
+      auto addressable = lifetime.getAddressableIndices();
+      auto condAddressable = lifetime.getConditionallyAddressableIndices();
+      ret << "_lifetime";
+
+      auto addIndexes = [&](swift::IndexSubset* bitvector) {
+        for (unsigned i = 0; i < bitvector->getCapacity(); ++i) {
+          if (bitvector->contains(i)) {
+            if (addressable && addressable->contains(i)) {
+              ret << "_address";
+            } else if (condAddressable && condAddressable->contains(i)) {
+              ret << "_address_for_deps";
+            }
+            ret << "_" << i;
+          }
+        }
+      };
+
+      if (lifetime.hasInheritLifetimeParamIndices()) {
+        ret << "_copy";
+        addIndexes(lifetime.getInheritIndices());
+      }
+      if (lifetime.hasScopeLifetimeParamIndices()) {
+        ret << "_borrow";
+        addIndexes(lifetime.getScopeIndices());
+      }
+      if (lifetime.isImmortal()) {
+        ret << "_immortal";
+      }
+    }
+  }
+
   ret << "->" << fetch(type->getResult());
   if (type->isAsync()) {
     ret << "_async";