Mainly this is done for array literals.
This new optimization creates a statically initialized global variable which is the allocated object.
The alloc_ref instruction is replaced by a global_value instruction.
This optimization can give significant performance improvements for large array literals.
This reverts commit 1b3d29a163, reversing
changes made to b32424953e.
We're seeing a handful of issues from turning on inlining of generics,
so I'm reverting to unblock the bots.
