Marina Taylor 63cb3e55e7

[ObjCARC] Don't sink objc_retain past atomic writes (#184113) ...

The atomic may cause another thread to objc_release the pointer, so
consider these instructions as potentially decrementing refcounts.

This patch is a synthesis of several AI models' outputs, as well as work
by David Kilzer.

Co-authored-by: David Kilzer <ddkilzer@apple.com>
Assisted-by: claude

rdar://152185192

2026-03-30 14:47:31 +01:00

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allocas.ll

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apelim.ll

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basic.ll

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cfg-hazards.ll

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clang-arc-use-barrier.ll

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code-motion.ll

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comdat-ipo.ll

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contract-attached-call-no-marker.ll

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contract-attached-call-retain-to-claim.ll

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contract-catchswitch.ll

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contract-end-of-use-list.ll

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contract-marker-funclet.ll

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contract-marker.ll

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contract-replace-arg-use.ll

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contract-rv-attr.ll

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contract-storestrong-funclet.ll

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contract-storestrong-ivar.ll

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contract-storestrong.ll

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contract-testcases.ll

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contract.ll

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empty-block.ll

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ensure-that-exception-unwind-path-is-visited.ll

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escape.ll

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expand.ll

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funclet-catchpad.ll

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funclet-cleanuppad.ll

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gvn.ll

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inert-global.ll

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inlined-autorelease-return-value.ll

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intrinsic-use-isolated.ll

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intrinsic-use.ll

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invoke-2.ll

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invoke.ll

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move-and-form-retain-autorelease.ll

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move-and-merge-autorelease.ll

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nested.ll

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opt-catchswitch.ll

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opt-max-ptr-states.ll

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path-overflow.ll

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pointer-types.ll

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post-inlining.ll

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pr12270.ll

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pr138961-regression.ll

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provenance.ll

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related-check.ll

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retain-block-side-effects.ll

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retain-not-declared.ll

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rle-s2l.ll

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rv.ll

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sink-past-atomic.ll

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split-backedge.ll

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tail-call-invariant-enforcement.ll

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test_autorelease_pool.ll

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unsafe-claim-rv.ll

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weak-contract.ll

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weak-copies.ll

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weak-dce.ll

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weak.ll

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