sqlite arc — interim static capacity bumps

Type: chore (capacity tuning) — Track A
Status: done
Owner: unassigned
Opened: 2026-06-27
Relation: interim/pragmatic counterpart to [[feature-dynamic-compiler-tables]] (the proper fix). Unblocks [[feature-c-desktop-lua-sqlite-path]] M5.

Decision (user, 2026-06-27)

Static arrays are fine for now, even at a real RAM cost — bump the fixed MAX_* caps as sqlite (the densest single TU) hits them. The dynamic-array rework is explicitly later ([[feature-dynamic-compiler-tables]]). This ticket just tracks the interim bumps so they are visible and re-pinnable as one unit.

Bumps so far

MAX_TOKENS 524288 → 2097152 (defs.inc). sqlite3.c (257k lines) overflowed 512K tokens at ~52% of the file. 2M gives headroom. Cost: the token tables (Tokens + TokPackRecords + CAttrFlags, ~32 B/entry dominant) grow ~4× in static bss — acceptable for a desktop compiler (demand-zero pages).

Expected next caps (watch as sqlite progresses)

MAX_AST (524288), MAX_IR (131072), MAX_SYMS (131072), MAX_UFIELD (262144), MAX_CTYPEDEF (8192), MAX_CPREP_MACROS/PARAMS/CHARS, MAX_CODE/MAX_DATA. Bump on the matching Error('too many …') / overflow.

Landmine — each bump needs a pin cycle

Raising any MAX_* changes the compiler's own bss → the self-host build is no longer byte-identical to the prior pinned binary. Each bump (or a batch) needs: make test (self-host fixedpoint byte-identical with the new size) → stabilize → pin → commit stable_linux_amd64/. Batch bumps where possible to avoid churn.

Acceptance

sqlite compiles without hitting a fixed-table ceiling (semantic bugs filed separately, e.g. [[bug-c-invalid-symbol-in-lea-sqlite]]).
The cap bumps are gated (make test + self-host byte-identical + cross) and pinned as a unit.
Superseded/closed when [[feature-dynamic-compiler-tables]] lands for the affected tables.

Log

2026-06-27 - Opened. MAX_TOKENS → 2M done (gating). User: static-now, dynamic-later. Track the remaining bumps here as the sqlite arc advances.
2026-07-19 (backlog sweep) RESOLVED. Superseded: close condition fired — Tokens/AST/IR/Syms/UField now dynamic (feature-dynamic-compiler-tables, e.g. 0f4b5882/0af554f2/e71df9df); sqlite green in corpus. Remaining small tables tracked there.
2026-07-19 — resolved, commit 0af554f2.