Commits on Oct 3, 2024

1. Refactor LOAD_GLOBAL specializations to avoid reloading {globals, b… …

   …uiltins} keys
   
   Each of the `LOAD_GLOBAL` specializations is implemented roughly as:
   
   1. Load keys version.
   2. Load cached keys version.
   3. Deopt if (1) and (2) don't match.
   4. Load keys.
   5. Load cached index into keys.
   6. Load object from (4) at offset from (5).
   
   This is not thread-safe in free-threaded builds; the keys object may be replaced
   in between steps (3) and (4).
   
   This change refactors the specializations to avoid reloading the keys object and
   instead pass the keys object from guards to be consumed by downstream uops.

   

   mpage committed Oct 3, 2024
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