php-in-php: delete SuperglobalRefreshStandaloneLlvm + StringMultipartStandaloneLlvm — route standalone AOT through PHP bridge (#9907 completion)

[PurHur]

Summary

Standalone AOT still quarantines ~1.9k-line SuperglobalRefreshStandaloneLlvm.php and ~1.4k-line StringMultipartStandaloneLlvm.php as opt-out fallbacks when PHP_COMPILER_SUPERGLOBAL_REFRESH_PHP=0. Embed and default standalone already use SuperglobalRefreshRuntime + SuperglobalRefreshJitHelper PHP (#9907).

php-src reference

• main/php_variables.c — superglobal registration
• main/rfc1867.c — multipart POST parsing

PHP SSOT (already exists)

• lib/JIT/Builtin/SuperglobalRefreshRuntime.php — standalone PHP bridge
• lib/Web/SuperglobalRefreshJitHelper.php — table builders
• lib/Web/MultipartParser.php + MultipartParserJitHelper.php — multipart via Superglobals refresh

Done when

• Delete SuperglobalRefreshStandaloneLlvm.php and StringMultipartStandaloneLlvm.php
• Remove LLVM fallback from SuperglobalRefreshRuntime; always compile PHP bridge for standalone
• Delete thin router StringMultipart.php; remove Context standalone hook
• Update shrink/standalone tests; spine sync if needed
• vendor/bin/phpunit --filter 'SuperglobalRefresh|Multipart' green
• make bootstrap-selfhost-vm-driver-execute-probe green

C/LLVM shrink

~3270 lines removed from lib/JIT/Builtin/*StandaloneLlvm.php.

Refs #1492, #9907, #9394, #5330

[PurHur]

claim: PHP Runtime → PHP — batch (issues #13031 SuperglobalRefreshStandaloneLlvm + StringMultipartStandaloneLlvm delete)

[PurHur]

Merged via #13032.

LLVM shrink: deleted SuperglobalRefreshStandaloneLlvm.php (~1904 LOC), StringMultipartStandaloneLlvm.php (~1367 LOC), StringMultipart.php router — ~3463 net lines removed.

Verification:

• vendor/bin/phpunit test/unit/SuperglobalRefreshRuntimeShrinkTest.php test/unit/MultipartRuntimeShrinkTest.php — OK
• vendor/bin/phpunit test/unit/JIT/SuperglobalsRefreshRuntimeStandaloneTest.php — OK
• make bootstrap-selfhost-vm-driver-execute-probe — OK
• php script/check-selfhost-spine-coverage-sync.php — OK (3422 files)

[PurHur]

claim: PHP Runtime → PHP — batch (issues #12811, #13031)

[PurHur]

Merged via #13657 — deleted SuperglobalRefreshStandaloneLlvm + StringMultipartStandaloneLlvm + StringMultipart router (~3270 LOC). Standalone AOT uses SuperglobalRefreshJitHelper PHP only. Verification: SuperglobalRefreshRuntimeShrinkTest + MultipartRuntimeShrinkTest + bootstrap-selfhost-vm-driver-execute-probe green.

[PurHur]

claim: PHP Runtime → PHP — completing StringMultipartStandaloneLlvm deletion (#13031 done-when); continuing from PR #15679 branch.

[PurHur]

Merged via #18115.

Shrink: deleted lib/JIT/Builtin/StringMultipartStandaloneLlvm.php (1367 LOC LLVM); user-script multipart now routes through MultipartNativeJitHelper PHP + MultipartRuntime JitVmHelperLink bridge.

Verification:

vendor/bin/phpunit test/unit/SuperglobalRefreshRuntimeShrinkTest.php test/unit/MultipartRuntimeShrinkTest.php → OK (6 tests)
make bootstrap-selfhost-vm-driver-execute-probe → OK

[PurHur]

claim: PHP Runtime → PHP — completing StringMultipartStandaloneLlvm deletion (#13031 follow-up)