Stream: git-wasmtime

Topic: wasmtime / PR #14328 Disable using `memset` on tables


view this post on Zulip Wasmtime GitHub notifications bot (Sep 14 2026 at 14:54):

alexcrichton opened PR #14328 from alexcrichton:disable-memset-on-tables to bytecodealliance:main:

While the preexisting predicate worked for funcref tables it didn't work for tables of GC reference types which require barriers under some collectors. After trying a few different shapes of this I've opted to just disable the optimization entirely since I don't think we have much relying on it and it seems best to start correct and optimize from there.

I've additionally opted for a unit test rather than the *.wast test from #14325 which, while it works, takes a moment to churn through so much memory locally. To keep the test suite running relatively fast a smaller Drop-based test was chosen.

Closes #14325

<!--
Please make sure you include the following information:

Our development process is documented in the Wasmtime book:
https://docs.wasmtime.dev/contributing-development-process.html

Please review the Bytecode Alliance's AI tool usage policy at
https://github.com/bytecodealliance/governance/blob/main/AI_TOOL_POLICY.md

Please ensure all communication follows the code of conduct:
https://github.com/bytecodealliance/wasmtime/blob/main/CODE_OF_CONDUCT.md
-->

view this post on Zulip Wasmtime GitHub notifications bot (Sep 14 2026 at 14:54):

alexcrichton requested cfallin for a review on PR #14328.

view this post on Zulip Wasmtime GitHub notifications bot (Sep 14 2026 at 14:54):

alexcrichton requested wasmtime-compiler-reviewers for a review on PR #14328.

view this post on Zulip Wasmtime GitHub notifications bot (Sep 14 2026 at 14:54):

alexcrichton requested wasmtime-core-reviewers for a review on PR #14328.

view this post on Zulip Wasmtime GitHub notifications bot (Sep 14 2026 at 15:07):

:thumbs_up: cfallin submitted PR review.

view this post on Zulip Wasmtime GitHub notifications bot (Sep 14 2026 at 15:07):

cfallin added PR #14328 Disable using memset on tables to the merge queue.

view this post on Zulip Wasmtime GitHub notifications bot (Sep 14 2026 at 15:33):

:check: cfallin merged PR #14328.

view this post on Zulip Wasmtime GitHub notifications bot (Sep 14 2026 at 15:33):

cfallin removed PR #14328 Disable using memset on tables from the merge queue.


Last updated: Sep 20 2026 at 18:08 UTC