php-in-php: drop Context ensureMinimalUserStandaloneBodies always-on SuperglobalNameRuntime — lazy at JitSuperglobalName call sites

[PurHur]

Category

Foundation · php-in-php · runtime-shrink · cold-build / #32122 class

Problem

Context::ensureMinimalUserStandaloneBodies() still eagerly NestedJIT/links SuperglobalNameRuntime on every thin AOT user-script init (hello-world / aot-smoke path), even when the script never calls __compiler_is_superglobal_name:

• SuperglobalNameRuntime::ensureLinked → NestedJIT SuperglobalNameJitHelper

Measured on master @ current tip: nm on AOT echo "hi" shows T __compiler_is_superglobal_name and hundreds of SuperglobalNameJitHelper string consts — waste NestedJIT during init. Same always-on NestedJIT vs Runtime ABI drift / cold-build surface class as closed #34807 (EnvLocal) / #34769 / #34642. Leftover Context NestedJIT vs Runtime ABI drift mints is_superglobal_name.1 (#31894 / #32122).

Call sites already StringSuperglobalName::ensureLinked before lookup (ext/standard/JitSuperglobalName.php, lib/JIT.php compileSuperglobalNameNative). Compile-time PHP paths use Web\Superglobals::isSuperglobalName — not the LLVM ABI.

Repro	Zend 8.2+	AOT thin hello-world
echo "hi"; (no is_superglobal)	hi	must not NestedJIT SuperglobalNameJitHelper during init
var_dump(__compiler_is_superglobal_name('_GET'));	int(1)	matches Zend via call-site ensureLinked

php-src reference

• php/php-src Zend/zend_compile.c — zend_is_auto_global_str
• Peer: #34807 EnvLocal lazy; #33235 Type always-on __compiler_is_superglobal_name shell drop

PHP implementation target

• lib/JIT/Context.php ensureMinimalUserStandaloneBodies — remove SuperglobalNameRuntime::ensureLinked
• Keep call-site StringSuperglobalName::ensureLinked / JitSuperglobalName
• Keep CliArgvRuntime::ensureStandaloneBodies in minimal (argv still needed before {main})
• Update peer shrink keep-lists + unit shrink test
• ./script/aot-smoke.sh 8/8

Repro

./script/aot-smoke.sh
./script/docker-exec.sh -- bash -lc 'echo '\''<?php echo "hi\n";'\'' > /tmp/hw.php && php bin/compile.php -o /tmp/hw.bin /tmp/hw.php && nm /tmp/hw.bin | grep -c SuperglobalNameJitHelper || true'

Done when

• ensureMinimalUserStandaloneBodies does not call SuperglobalNameRuntime::ensureLinked
• Thin hello-world AOT binary does not NestedJIT SuperglobalNameJitHelper (no __compiler_is_superglobal_name from eager init)
• AOT __compiler_is_superglobal_name('_GET') still matches Zend via call-site ensureLinked
• ./script/aot-smoke.sh still 8/8
• Shrink unit test + peer keep-list updates

[PurHur]

claim: php-runtime-migration — drop ensureMinimal SuperglobalNameRuntime always-on (NestedJIT SuperglobalNameJitHelper on hello-world; peer #34807)