[PurHur]

Summary

• Remove thin-AOT hard-throw in DateTime{,Immutable}::add/sub when the interval has year/month components (P1M, etc.).
• For thin user-script AOT, apply compile-time-known DateInterval state via UTC civil LLVM (JitGetdate) — same shape as modify('+1 month') — avoiding NestedJIT DateMutationJitHelper (which needs __nativearray__boundscheck).
• Non-thin AOT still uses DateMutationRuntime / __phpc_date_apply_interval.

php-src: ext/date/php_date.c — date_add / DateTime::add

Verification

./script/aot-smoke.sh
# aot-smoke: 8 passed, 0 failed

./script/phpunit.sh --filter Issue33781DateTimeRuntimeIntervalAotTest
# OK (1 test, 4 assertions)

./script/docker-exec.sh -- bash -lc 'PHP_COMPILER_HELPER_RUNTIME_O=0 php bin/compile.php -o /tmp/di.bin test/repro/issue_33781_datetime_runtime_interval_aot.php && /tmp/di.bin'
# 2020-02-15
# 2020-01-16

Not run: full ./script/ci-local.sh

Closes #33781

Made with Cursor

[PurHur]

Duplicate of merged #33786 — master repro green @ bafd740.