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Title: Align bytecode CFG cleanup with CPython by youknowone · Pull Request #7781 · RustPython/RustPython · GitHub

Open Graph Title: Align bytecode CFG cleanup with CPython by youknowone · Pull Request #7781 · RustPython/RustPython

X Title: Align bytecode CFG cleanup with CPython by youknowone · Pull Request #7781 · RustPython/RustPython

Description: Summary by CodeRabbit New Features Added a preprocessing pass that rewrites certain percent-format string expressions into f-string-style interpolations. Bug Fixes Improved control-flow, exception/cleanup sequencing, line-anchor/NOP preservation, constant-folding behavior, and boolean short-circuit/threading edge cases. Tests Added extensive CPython-style tests covering short-circuiting, loop backedge/continue cases, cleanup sequencing, parameter init, and bytecode layout. Chores Refactored scope/symbol analysis, layout-aware optimizations, jump-threading logic, and updated spell-check dictionary entries.

Open Graph Description: Summary by CodeRabbit New Features Added a preprocessing pass that rewrites certain percent-format string expressions into f-string-style interpolations. Bug Fixes Improved control-flow, exc...

X Description: Summary by CodeRabbit New Features Added a preprocessing pass that rewrites certain percent-format string expressions into f-string-style interpolations. Bug Fixes Improved control-flow, exc...

Opengraph URL: https://github.com/RustPython/RustPython/pull/7781

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og:image:altSummary by CodeRabbit New Features Added a preprocessing pass that rewrites certain percent-format string expressions into f-string-style interpolations. Bug Fixes Improved control-flow, exc...
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Show all changes 76 commits https://github.com/RustPython/RustPython/pull/7781/files
c09c475 Align CFG cleanup bytecode with CPython youknowone Apr 28, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/c09c47596a84110bd8c3d5ecedefdd20bae6ee86
fe64200 remove test youknowone Apr 30, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/fe642009a57152bc4119bfd1868ed7ea81a5d234
94e2ae3 Align bytecode CFG cleanup with CPython youknowone May 5, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/94e2ae3abdafd596ecb07527dbae66a3db2fa09c
a743ffc fix youknowone May 5, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/a743ffc2c0aeb2dbc473ff782d0c7935cbd17466
c998628 Align named-except borrow deopts with CPython youknowone May 5, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/c998628e74d94b3d7806286860eda4111f4e21b7
68610b9 Remove duplicated Lib test codegen cases youknowone May 5, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/68610b9d61d2da1eba2c09d9f3715e141f763db0
c82c43f Cache CFG layout predecessors during NOP cleanup youknowone May 6, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/c82c43f870e2393e0735aa9f5ca7f42bf1ecd429
cd9a711 Address bytecode parity review feedback youknowone May 7, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/cd9a71146d85f771f35edd2c50553bed457ea2ae
15a88df Align nested with cleanup bytecode youknowone May 7, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/15a88dfb09a058d8a6d123e538164ce4d92cae4f
4bd27be Align conditional raise loop backedge ordering youknowone May 7, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/4bd27bea96b20c590bd291e07b79a8bfd0c08b8a
9b257b1 Align percent format optimization with CPython preprocess youknowone May 7, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/9b257b16bd89d21134b56755da16fdc5f74b3f83
8fbe367 Preserve shared finally reraises in CFG cleanup youknowone May 7, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/8fbe367eb5ed99431e7312483b6bbbde831a1ce7
3ccda96 Align CFG cleanup with CPython finally layout youknowone May 7, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/3ccda96213cf296744def175227865f96ece0ea4
2aa954f Align loop CFG anchors with CPython youknowone May 7, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/2aa954fb90b52e05c74f0839386f498fabfd19c4
742ff9b Preserve loop false-path CFG bodies youknowone May 7, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/742ff9bff2545a66365db99da5a8a0bb1da1c026
6cfa6f2 Align protected store-subscript CFG bytecode youknowone May 7, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/6cfa6f2570509e0b2ca0cd596ba48f58d9aa94d6
cc59c46 Align borrow deopts with CPython CFG youknowone May 7, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/cc59c4678dad8948b209a9e023d29aebb93a1934
891e972 Align delete-loop CFG with CPython youknowone May 7, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/891e972860a340c1e3217077184f12d5cae2a7ad
19b7427 Align CFG inlining with CPython jumps youknowone May 7, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/19b74273372d7353aeb9ab6eee560c971d98abc9
d734c06 Align protected CFG jump threading youknowone May 7, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/d734c060117238a1d1692e1f150cf5db84a455b9
0e2b226 Narrow handler resume borrow deopt youknowone May 7, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/0e2b2264c1ce2dd30387a4131ce0c9f1cb441dff
3bb0430 Preserve branch-local implicit continue targets youknowone May 7, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/3bb04305e8254dfc1368eae626db386cd6ba5fc4
55ec30d Avoid duplicating boolop continue backedges youknowone May 7, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/55ec30d2df46749763377140c8662a61cf265e1e
95c4492 Preserve same-line assert message borrows youknowone May 7, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/95c4492a8e03e4c999cec979ab17d55fde02b412
8ce6677 Handle nested handler update tail borrows youknowone May 7, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/8ce66775fb9a8c48e6ab85586110595a09c7c003
d37b510 Align terminal handler borrow deopts with CPython CFG youknowone May 7, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/d37b510f90a1eb238f5b97f2401a26f1ba7af2c2
ac086bf Refine borrow deopts for reraise handler continuations youknowone May 7, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/ac086bf2f19e4a62ffa60dee4df534ca9df8a237
644d3e3 Refine try-else terminal handler borrow deopts youknowone May 7, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/644d3e35e5a2ef87e6a11567c3b6fcfd2416a273
7adc9f4 Refine protected tail borrow parity youknowone May 7, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/7adc9f419750aaa7623bed27e8b8a0d93ec627ba
33ec4a6 Refine exception borrow deopt parity youknowone May 7, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/33ec4a630d5d9e683e112da2b9f1b6ff81849317
de00801 Align while loop CFG layout with CPython youknowone May 7, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/de00801a54a9acce7d6ea60ec05295d56a146528
309b936 Align loop backedge CFG with CPython youknowone May 7, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/309b93618e3dcd1f4b2e45aebf71d43e46525c2b
f3b8ba1 Handle multi-block scope-exit CFG segments youknowone May 7, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/f3b8ba1c4d30b585c036ffd023c7c24f5e9b7c33
aa2ca06 Preserve CPython-normalized call-body CFG youknowone May 7, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/aa2ca06d249e61fc16c71635c0671e2a45accf5d
cea61f2 Preserve CPython empty if-end return anchor youknowone May 7, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/cea61f2ce0fb648bdd28f68ec5551818ebeb5baa
8be2a54 Match CPython borrow CFG boundaries youknowone May 7, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/8be2a54f16fef8ea175eaee062ca2a9f039e3757
f155436 Match CPython tuple unpack constant folding youknowone May 7, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/f155436a49eeca7e34f3f3b2ca916063b4f1f5e5
85c3367 Match CPython implicit continue CFG layout youknowone May 7, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/85c336742c9052dfbb3a66116563dfd2c2d9eacd
bb7be66 Keep implicit continue CFG targets in layout youknowone May 7, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/bb7be661034bb81029004f3a3fa5799d055d7d1c
058bc6d Align try-except end label location with CPython youknowone May 7, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/058bc6d0a80a3dbad607ec9722d686ee692187f1
e4eb97c Remove folded operand NOPs before line propagation youknowone May 8, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/e4eb97c249d6a0abf81ffe5f913a82f97e86faa6
b022111 Align no-location return exit handling youknowone May 8, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/b0221119672d3016cd6ae57f5fad2a499dc4bb9d
5e4c096 Align nested protected import bytecode youknowone May 8, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/5e4c096a9fb33b0e1eb9a49c0ede40c79c323da4
f7d8240 Align conditional loop backedge layout youknowone May 8, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/f7d82408be0d4824d928665f67b03250df3ff735
5001df7 Align protected loop exit duplication youknowone May 8, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/5001df7781ee85eaed7ef14a7afd8c9e33ca04ca
6b604df Preserve protected jump-back duplicates youknowone May 8, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/6b604df853ce9b70b3db01997eb0fa182f955f6b
83f109e Align loop call-body backedge layout youknowone May 8, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/83f109e053cc9cb0287fe15f116ddc6c8abad642
3e11e1f Align future annotation setup ordering youknowone May 8, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/3e11e1fb31131a10a211a08ceca265315d0cb80e
88ec625 Align named-except cleanup and borrow parity youknowone May 8, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/88ec62547b5ca70893a57bc5fba58c7588bdd6ae
e24a9b7 Align redundant jump removal with CPython youknowone May 8, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/e24a9b770c948ca10c11d7bb8b70b02a9a3a1c8d
7f1376b Preserve finally cleanup jump NOPs youknowone May 8, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/7f1376be70efadf4b22d093fe47260c38b91c095
6f95452 Align finally cleanup CFG with CPython youknowone May 8, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/6f95452390bfa9b0d30890926174f4437160856f
1d078e3 Fix finally cleanup CFG regression youknowone May 8, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/1d078e383573266e742f39dd84299a6e518d776b
85c70ca Align async cleanup CFG marker handling youknowone May 8, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/85c70caa524c19ebbe1c96a49395cf4cc1c9e6a1
606e816 Preserve CPython continue CFG layout before conditional bodies youknowone May 8, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/606e81615bb9bdc8a777040f36c819d5ae2f369c
b340ca8 Refine protected CFG bytecode parity youknowone May 8, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/b340ca8c529bf454fdbb45fa4a78a586c32472e1
330c44c Align protected CFG cleanup layout youknowone May 8, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/330c44c0aed104091007aea99a369967eaac2688
9c737eb Align CFG cleanup and peephole parity youknowone May 8, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/9c737eb9d325d39f6f87e043238aead9b1a128f4
d35c13d Align nested loop conditional CFG layout youknowone May 8, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/d35c13d6cccf347cc57c0360dda5924f95cc7292
bba340b Align named expression comprehension scope youknowone May 8, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/bba340b6ab57e4534c686c2e143faa023c8f94f9
ea757cf Align CFG cleanup with CPython line markers youknowone May 8, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/ea757cf5e47ca240f602c8db20f437d4e27dead3
555e8fc Align CFG line marker cleanup with CPython youknowone May 8, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/555e8fca93bab4d9fbdcaa162395896bef4a799b
8abe32a Align loop CFG fallthrough with CPython youknowone May 8, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/8abe32a9a890a87cbb5b3e62e1891e9ccaee9640
05d96e4 Align conditional CFG fallthrough cases with CPython youknowone May 8, 2026 https://github.com/RustPython/RustPython/pull/7781/commits/05d96e4dd98c95f956dd488c394ddf28e3d9522d
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