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

[PurHur]

Category

php-in-php · runtime-shrink (#1492, peer #22495 Lcg / #22468 StreamSocketPairRuntime)

Problem

lib/JIT/Builtin/MathModf.php still hand-rolls NestedJitCompileScope::run + parseAndCompile + new JIT() for ModfJitHelper.php. Peer 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 ext/standard/math.c — PHP_FUNCTION(modf) (semantics unchanged; compile-path only)

PHP implementation target

• lib/JIT/Builtin/MathModf.php — replace ensureJitHelperCompiled body with JitVmHelperLink::ensureCompiled + lookupCompiled; drop use PHPCompiler\JIT / NestedJitCompileScope
• test/unit/ModfRuntimeShrinkTest.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/ModfRuntimeShrinkTest.php'
make bootstrap-selfhost-vm-driver-execute-probe

Done when

• MathModf 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, #15200, #22495, #22468

[PurHur]

claim: PHP Runtime → PHP — starting this run

Pillar 1 probe (this workspace):

Gate	Status
bootstrap-inventory --check	green OK 6432/6432
release-readiness --json	green user_release_ready: yes
north-star5-fast / spine / vm-driver-probe	green

Migrating MathModf NestedJIT → JitVmHelperLink::ensureCompiled (peer #22495).

[PurHur]

Merged #22520

Verification:

• ModfRuntimeShrinkTest — OK (3 tests, 18 assertions)
• make bootstrap-selfhost-vm-driver-execute-probe — OK

C/PHP shrink: MathModf.php −26 net lines (hand-rolled NestedJIT compile deleted; shared JitVmHelperLink::ensureCompiled).