php-in-php: JIT HttpResponseCode — route http_response_code() through VmHttpResponse PHP not LLVM globals (#1492)

[PurHur]

Category

php-in-php · php-src-strict

Problem

http_response_code() JIT/AOT lowering uses lib/JIT/Builtin/HttpResponseCode.php (~375 lines) with LLVM module globals (__phpc_http_response_status, __phpc_http_response_code_apply) and hand-rolled boxing. VM semantics already live in ext/standard/VmHttpResponse.php / http_response_code.php (PHP).

Duplicate LLVM state diverges from VM fixes (#9306 return-int regression, 0 no-op setter) and blocks shrinking the native bridge.

php-src reference

• php/php-src ext/standard/head.c — php_http_response_code
• VM port: ext/standard/VmHttpResponse.php

Repro (JIT divergence)

<?php
http_response_code(404);
var_dump(http_response_code());
var_dump(is_int(http_response_code()));

./script/docker-exec.sh -- bash -lc 'source script/php-env.sh
php repro.php
php bin/vm.php repro.php
php bin/jit.php repro.php
'

Mode	Expected
VM	int(404), is_int true
JIT	same as VM after migration

Scope (this repo)

Layer	Work
JIT	Replace HttpResponseCode::implement() LLVM globals with call into VmHttpResponse / shared PHP helper
Delete/shrink	lib/JIT/Builtin/HttpResponseCode.php LLVM bodies; keep thin trampoline if needed
AOT	same entry as JIT
Tests	extend test/compliance/cases/stdlib/http_response_code*.phpt for JIT

PHP-in-PHP: route through existing ext/standard PHP; delete LLVM global/status apply table.

Done when

• JIT + AOT repro matches VM/php-src on int returns and http_response_code(0) no-op
• HttpResponseCode.php LLVM lowered by >50% (lines or symbols deleted — note in PR)
• ./script/ci-fast.sh --filter http_response_code green

Related

• Regression: http_response_code() returns ResponseCode enum case not int — breaks status comparisons (ext/standard/head.c) #9306 int return regression · Stdlib: http_response_code() — enum case response_code must TypeError (ext/standard/head.c, php-src-strict) #6037 enum operand TypeError · Epic: Self-host critical path — compiler compiles itself (M3→M5) #1492

[PurHur]

claim: PHP Runtime → PHP — starting this run.

[PurHur]

Merged via #10854.

LLVM shrink: HttpResponseCode.php 392→37 lines; removed __phpc_http_response_status* LLVM globals. JIT/AOT status SSOT: ext/standard/HttpResponseJitHelper.php via HttpResponseRuntime bridges.

Verification: HttpResponseCodeRuntimeShrinkTest OK; http_response_code_jit compliance OK; php bin/jit.php test/repro/http_response_code_return_int.php → int(404); make bootstrap-selfhost-vm-driver-execute-probe OK.