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php-in-php: chunk_split() JIT via ChunkSplitJitHelper PHP — drop inline LLVM in JitChunkSplit.php #14626
Description
Category
php-in-php · php-src-strict
Problem
chunk_split() VM uses VmString::chunkSplit() but JIT/AOT still lowers the split loop through ~110-line JitChunkSplit::split() LLVM in ext/standard/JitChunkSplit.php.
php-src reference
- ext/standard/string.c — PHP_FUNCTION(chunk_split)
Repro
./script/docker-exec.sh -- bash -lc 'source script/php-env.sh && php bin/jit.php -r "echo chunk_split(\"1234567890\", 3, \"-\");"'
./script/docker-exec.sh -- bash -lc 'source script/php-env.sh && php vendor/bin/phpunit --filter ChunkSplitRuntimeShrinkTest'Scope
| Path | Work |
|---|---|
ext/standard/ChunkSplitJitHelper.php |
JIT SSOT delegating to VmString |
lib/JIT/Builtin/StringChunkSplit.php |
Thin __compiler_chunk_split bridge |
ext/standard/chunk_split.php |
Route split through bridge |
| Shrink | Delete JitChunkSplit::split() LLVM (~110 LOC) |
Done when
- JIT/AOT chunk_split matches Zend on
test/compliance/cases/stdlib/chunk_split*.phpt JitChunkSplit::split()removed; PR notes LLVM lines removedmake bootstrap-selfhost-vm-driver-execute-probegreen
Refs north star #1492
Activity
PurHur commentedon Jul 1, 2026
claim: PHP Runtime → PHP — batch (issues #14626, #14627)
php-in-php: chunk_split() JIT via ChunkSplitJitHelper PHP (#14626)
php-in-php: chunk_split() JIT via ChunkSplitJitHelper PHP (#14626) (#…
PurHur commentedon Jul 1, 2026
Merged via PR #14628.
Verification: ChunkSplitRuntimeShrinkTest OK (3/3); JIT chunk_split core cases green; spine sync OK; bootstrap-selfhost-vm-driver-execute-probe OK.
Shrink: JitChunkSplit.php 359→247 (−112 LOC LLVM split loop).