)]}'
{
  "commit": "5769253eff21418f3fa4aae1c3fe74aae9669471",
  "tree": "efa905f8c5ddb38eaa49595942708b1945fb2730",
  "parents": [
    "d99b5ba1b633c8e2d05ee9b22ace14a37bc9626f"
  ],
  "author": {
    "name": "Protobuf Team Bot",
    "email": "protobuf-github-bot@google.com",
    "time": "Wed Nov 04 03:17:46 2026 -0800"
  },
  "committer": {
    "name": "Copybara-Service",
    "email": "copybara-worker@google.com",
    "time": "Wed Nov 04 04:07:54 2026 -0800"
  },
  "message": "Shrink `TcParseTableBase` from 56 bytes to 32 bytes by removing its three 8-byte pointer members (`class_data`, `post_loop_handler`, and `fallback`):\n\n1. **`class_data` (`-8 B`, `-1` relocation/msg)**: Every generated `\u003cMsg\u003e_globals_` struct embeds `TcParseTableBase` at a deterministic offset stored in `ClassData::default_instance()[1]` (`OffsetToParseTable()`), and reflection-created tables store `default_instance()` in `aux_entries[0]` (`kSelfVerifyFunc`). Compute `ClassData` and `default_instance` directly without storing a redundant pointer in `TcParseTableBase`.\n2. **`post_loop_handler` (`-8 B`, `-1` relocation/msg)**: `post_loop_handler` is null on ~94.5-98.1% of messages and is already gated by `has_post_loop_handler`. Pack `has_post_loop_handler : 2` (`0` \u003d none, `1` \u003d `TcParser::VerifyHasbits`, `2` \u003d `TcParser::ReflectionPostLoopHandler`, `3` \u003d custom handler stored in `aux_entries[1]` via `kPostLoopHandler`).\n3. **`fallback` (`-8 B`, `-1` relocation/msg)**: Store a 5-bit `fallback_idx` (`TcParseFunction` enum) in `TcParseTableBase` and index a `constexpr` function pointer table in `TcParseTableBase::fallback()`.\n\nNote on `TcParseTable` pure-integer tail arrays (`field_lookup_table`, `field_entries`, `field_names`): these are kept inside `TcParseTable` rather than moved to a separate `.rodata` symbol because C++ `constexpr` evaluation cannot initialize a 32-bit offset member with a cross-section pointer difference (`\u0026rodata_tail - \u0026header`), and replacing the offset with a pointer would add `+8 B` and `+1` dynamic relocation per message in `.data.rel.ro`/`pb_defaults`.\n\nPiperOrigin-RevId: 1013709112\n",
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