php-in-php: PowIntRuntime NestedJIT → JitVmHelperLink::ensureCompiled (#1492)

[PurHur]

Category

php-in-php · runtime-shrink (#1492, peer #22575 MathFrexp / #22519 MathModf / #22495 Lcg)

Problem

lib/JIT/Builtin/PowIntRuntime.php still hand-rolls NestedJitCompileScope::run + parseAndCompile + new JIT() for PowIntJitHelper.php. Peer math runtimes route helper compile through JitVmHelperLink::ensureCompiled for consistent user-script env clearing, insert-block restore, and helper-runtime cache.

php-src reference

• php/php-src Zend/zend_operators.c — pow_function integer fast path (semantics unchanged; compile-path only)

PHP implementation target

• lib/JIT/Builtin/PowIntRuntime.php — replace ensureJitHelperCompiled body with JitVmHelperLink::ensureCompiled + lookupCompiled; drop use PHPCompiler\JIT / NestedJitCompileScope
• test/unit/PowIntRuntimeShrinkTest.php — guard JitVmHelperLink::ensureCompiled, no hand-rolled NestedJitCompileScope::run / parseAndCompile / new JIT(

Repro

./script/docker-exec.sh -- bash -lc 'source script/php-env.sh && vendor/bin/phpunit test/unit/PowIntRuntimeShrinkTest.php'
make bootstrap-selfhost-vm-driver-execute-probe

Done when

• PowIntRuntime uses JitVmHelperLink::ensureCompiled only for helper compile
• Shrink unit test green
• make bootstrap-selfhost-vm-driver-execute-probe green
• PR body cites lines removed

Refs #1492, #9515, #22575, #22519, #22495

[PurHur]

claim: PHP Runtime → PHP — starting this run

Pillar 1 (pre-claim):

Gate	Status	Symptom
release-readiness --json	green	user_release_ready: yes; inventory OK 6532/6532; north-star5-fast + spine + vm-driver-probe ok
bootstrap-selfhost-link	in progress	Zend gen-0 fallback (stale committed driver #21855) — concurrent

Migrating PowIntRuntime NestedJIT hand-roll → JitVmHelperLink::ensureCompiled (peer #22575 Frexp).

[PurHur]

Merged #23098

• PowIntRuntime → JitVmHelperLink::ensureCompiled / lookupCompiled
• Net −26 lines in lib/JIT/Builtin/PowIntRuntime.php
• Verification: PowIntRuntimeShrinkTest + PowIntResultBuiltinTest OK (4 tests); make bootstrap-selfhost-vm-driver-execute-probe OK