Stream: git-wasmtime

Topic: wasmtime / PR #5511 cranelift-wasm: Better track reachabi...

Wasmtime GitHub notifications bot (Jan 03 2023 at 21:35):

fitzgen opened PR #5511 from issues-5455-and-5456 to main:

We can sometimes statically determine that a given load will unconditionally trap. When this happens, we emit an unconditional trap, and we need to stop adding new instructions to the block. This commit introduces a Reachability<T> type that is like Option<T> but specifically for communicating reachability and is marked must_use to receivers to handle transitions from reachable to unreachable states.

Additionally, adds handling of reachable -> unreachable state transitions to some SIMD op translations that weren't checking for it.

Fixes #5455
Fixes #5456

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Wasmtime GitHub notifications bot (Jan 03 2023 at 21:35):

fitzgen requested alexcrichton for a review on PR #5511.

Wasmtime GitHub notifications bot (Jan 03 2023 at 21:36):

fitzgen edited PR #5511 from issues-5455-and-5456 to main:

We can sometimes statically determine that a given load will unconditionally trap. When this happens, we emit an unconditional trap, and we need to stop adding new instructions to the block. This commit introduces a Reachability<T> type that is like Option<T> but specifically for communicating reachability and is marked must_use to force receivers to handle transitions from reachable to unreachable states.

Additionally, adds handling of reachable -> unreachable state transitions to some SIMD op translations that weren't checking for it.

Fixes #5455
Fixes #5456

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• [ ] A short description of what this does, why it is needed; if the
  description becomes long, the matter should probably be discussed in an issue
  first.

• [ ] This PR contains test cases, if meaningful.

• [ ] A reviewer from the core maintainer team has been assigned for this PR.
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Wasmtime GitHub notifications bot (Jan 03 2023 at 21:38):

alexcrichton submitted PR review.

Wasmtime GitHub notifications bot (Jan 03 2023 at 21:39):

fitzgen has enabled auto merge for PR #5511.

Wasmtime GitHub notifications bot (Jan 03 2023 at 22:04):

fitzgen merged PR #5511.

Last updated: Dec 23 2024 at 13:07 UTC