Rename TypeSet::clone to TypeSet::cloneIntoUninitialized to indicate that it freshly initializes the TemporaryTypeSet* provided to it.

Also removes existing code that, quite unnecessarily, partly initialized that argument.

1 files changed, 4 insertions, 1 deletions

diff --git a/js/src/vm/TypeInference.h b/js/src/vm/TypeInference.h
index 0e737bad7..0f1cd4936 100644
--- a/js/src/vm/TypeInference.h
+++ b/js/src/vm/TypeInference.h
@@ -498,7 +498,10 @@ class TypeSet
 
     // Clone a type set into an arbitrary allocator.
     TemporaryTypeSet* clone(LifoAlloc* alloc) const;
-    bool clone(LifoAlloc* alloc, TemporaryTypeSet* result) const;
+
+    // |*result| is not even partly initialized when this function is called:
+    // this function placement-new's its contents into existence.
+    bool cloneIntoUninitialized(LifoAlloc* alloc, TemporaryTypeSet* result) const;
 
     // Create a new TemporaryTypeSet where undefined and/or null has been filtered out.
     TemporaryTypeSet* filter(LifoAlloc* alloc, bool filterUndefined, bool filterNull) const;