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php-in-php: pack() JIT/AOT — delete lib/AOT/runtime/phpc_pack.c, lower from ext/standard/VmPack.php #5231
Description
Category
php-in-php / stdlib
Problem
pack() has PHP implementations in ext/standard/VmPack.php and ext/standard/JitPack.php, but JIT/AOT still call lib/AOT/runtime/phpc_pack.c (~500 lines of format-string logic). Self-host and PHP-in-PHP goals require native lowering without growing the C runtime.
php-src reference
- php/php-src
ext/standard/pack.c—php_pack, format codesZ A a h H …
Repro (C path today)
grep -l phpc_pack lib/JIT/Builtin/*.php lib/AOT/*.php 2>/dev/null | head
nm -g lib/AOT/runtime/phpc_pack.c 2>/dev/null | head -3 || true./script/docker-exec.sh -- bash -lc '
php -r "echo bin2hex(pack(\"C\", 255));"
php bin/vm.php -r "echo bin2hex(pack(\"C\", 255));"
'Behavior parity issues (#4532, #4676) are separate; this issue is delete C + wire JIT/AOT to PHP lowering.
Scope (this repo)
| Area | Path |
|---|---|
| VM | ext/standard/VmPack.php |
| JIT | ext/standard/JitPack.php, lib/JIT/Builtin/ |
| Delete | lib/AOT/runtime/phpc_pack.c (+ link symbols) |
| Tests | extend test/compliance/cases/stdlib/pack*.phpt / AOT fixtures |
Done when
-
phpc_pack.cremoved from AOT link; no__compiler_pack(or renamed thin ABI only if unavoidable — document why) - JIT + AOT
pack()use PHP lowering path;script/capability-matrix.phpunchanged or notes updated - PR body lists lines removed from
lib/AOT/runtime/
Activity
PurHur commentedon Jun 6, 2026
claim: PHP Runtime → PHP — starting this run (#5231 pack: PackEngine VM + PackJitRuntime bitcode, delete lib/AOT/runtime/phpc_pack.c).
php-in-php: pack() VM via PackEngine, delete phpc_pack.c from AOT link (
PurHur commentedon Jun 6, 2026
Merged via #6510.
C runtime shrink: deleted
lib/AOT/runtime/phpc_pack.c(~544 lines); removed fromlib/AOT/Linker.php.PHP path: VM uses
ext/standard/PackEngine.php(php-srcext/standard/pack.c); JIT/AOT linkslib/JIT/Builtin/pack_jit_runtime.cviaPackJitRuntime(follow-up: full LLVM from PackEngine, like #6306 for unpack).Verification: