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Title: Harden CALL specialization guards and cache callables by youknowone · Pull Request #7360 · RustPython/RustPython · GitHub

Open Graph Title: Harden CALL specialization guards and cache callables by youknowone · Pull Request #7360 · RustPython/RustPython

X Title: Harden CALL specialization guards and cache callables by youknowone · Pull Request #7360 · RustPython/RustPython

Description: Summary Cache canonical len, isinstance, and list.append callables in VirtualMachine::callable_cache for identity-based CALL guards (replacing per-site pointer caches) Cache __init__ PyFunction in HeapTypeExt for CALL_ALLOC_AND_ENTER_INIT, invalidated on type.modified() Add objclass type check to CALL_METHOD_DESCRIPTOR_* runtime guards Add C-stack recursion guard on non-vectorcall CALL fastpaths Keep EXIT-style CALL specialized opcodes on guard miss instead of deoptimizing Skip CALL specialization when CO_OPTIMIZED flag is absent Fix drop_first_typed for #[pymethod(raw)] in call-flags inference Test plan CI passes on all platforms (Ubuntu, macOS, Windows) Specialization guards correctly reject mismatched callables Raw methods infer correct call convention flags 🤖 Generated with Claude Code Summary by CodeRabbit Refactor Enhanced call specialization, caching, and fast-paths to speed common function/method invocations, reduce deoptimization, and prefer vectorcall-like routes. Added per-type cached init/getitem specializations with invalidation on type changes. Introduced a per-VM callable cache propagated across threads. Added a pluggable allocation hook for object/type allocation and a tp_alloc slot. Bug Fixes Adjusted method argument handling to correct binding behavior in certain edge cases.

Open Graph Description: Summary Cache canonical len, isinstance, and list.append callables in VirtualMachine::callable_cache for identity-based CALL guards (replacing per-site pointer caches) Cache __init__ PyFunction in...

X Description: Summary Cache canonical len, isinstance, and list.append callables in VirtualMachine::callable_cache for identity-based CALL guards (replacing per-site pointer caches) Cache __init__ PyFunction in...

Opengraph URL: https://github.com/RustPython/RustPython/pull/7360

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Harden CALL specialization guards and cache callables https://github.com/RustPython/RustPython/pull/7360/files#top
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3347161 vm: align CALL/CALL_KW specialization core guards with CPython youknowone Mar 8, 2026 https://github.com/RustPython/RustPython/pull/7360/commits/3347161a3549f83816679d07df9677adc26cb616
be1fe71 vm: keep specialization hot on misses and add heaptype getitem parity youknowone Mar 8, 2026 https://github.com/RustPython/RustPython/pull/7360/commits/be1fe7107be97663b7070c3b07081354cc7ddda1
29f4284 vm: align call-alloc/getitem cache guards and call fastpath ordering youknowone Mar 8, 2026 https://github.com/RustPython/RustPython/pull/7360/commits/29f4284009c042ddd4ffa702f9fe28850db619b7
17f1fa4 vm: align BINARY_OP, STORE_SUBSCR, UNPACK_SEQUENCE specialization guards youknowone Mar 8, 2026 https://github.com/RustPython/RustPython/pull/7360/commits/17f1fa420d8a15932081df3186bbba52eeabfd8e
f6872fa vm: finalize unicode/subscr specialization parity and regressions youknowone Mar 8, 2026 https://github.com/RustPython/RustPython/pull/7360/commits/f6872fa405962cf24a37a1a4025a8cd98d70e3f5
e65cbc0 vm: finalize specialization GC safety, tests, and cleanup youknowone Mar 8, 2026 https://github.com/RustPython/RustPython/pull/7360/commits/e65cbc0d58146156651440658cf5b1205ac361c3
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