A unit's record holds its IR in the compact encoding, the entries it added
to the helper, lifted-function and other appendable lowerer tables, and the
reachability, generic demand, statement and flag events it made. A unit has
no record when it grew a table no record carries, changed a field, replaced
an entry it did not add, or emitted a diagnostic. Every lowerer collection
and scalar field is classified, and a test fails on one that is not.
SCRIPTC_LOWER_JOURNAL=serial records every unit and replaces its results
with the ones its record carries. scripts/recorded-lowering.mjs
(pnpm test:recorded-lowering) compares corpus programs' LLVM text with and
without the mode. SCRIPTC_LOWER_JOURNAL_DUMP=<dir> also turns the mode on
and appends each unit's record to <dir>/records.jsonl. Without either,
lowering is unchanged.
Chris Tate
f65c5518bf