ISLE: port extend/reduce opcodes on x64. #3849
Merged
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
github-actions
bot
added
cranelift
Subscribe to Label Action
This issue or pull request has been labeled: "cranelift", "cranelift:area:aarch64", "cranelift:area:machinst", "cranelift:area:x64", "isle"
Thus the following users have been cc'd because of the following labels:
To subscribe or unsubscribe from this label, edit the |
cfallin
force-pushed
the
isle-extends
branch
2 times, most recently
from
55eb07d to
eb1b71e
Compare
This was referenced Feb 26, 2022
cfallin
force-pushed
the
isle-extends
branch
from
eb1b71e to
7414437
Compare
cfallin
added a commit
that referenced
this pull request
Mar 9, 2022
In #3849, I moved uextend over to ISLE in the x64 backend. Unfortunately, the lowering patterns had a bug in the i32-to-i64 special case (when we know the generating instruction zeroes the upper 32 bits): it wasn't actually special casing for an i32 source! This meant that e.g. zero extends of the results of i8 adds did not work properly. This PR fixes the bug and updates the runtest for extends significantly to cover the narrow-value cases. No security impact to Wasm as Wasm does not use narrow integer types. Thanks @bjorn3 for reporting!
cfallin
added a commit
to cfallin/wasmtime
that referenced
this pull request
Mar 9, 2022
In bytecodealliance#3849, I moved uextend over to ISLE in the x64 backend. Unfortunately, the lowering patterns had a bug in the i32-to-i64 special case (when we know the generating instruction zeroes the upper 32 bits): it wasn't actually special casing for an i32 source! This meant that e.g. zero extends of the results of i8 adds did not work properly. This PR fixes the bug and updates the runtest for extends significantly to cover the narrow-value cases. No security impact to Wasm as Wasm does not use narrow integer types. Thanks @bjorn3 for reporting!
cfallin
added a commit
that referenced
this pull request
Mar 9, 2022
* Fix uextend on x64 for non-i32-source cases. (#3906) In #3849, I moved uextend over to ISLE in the x64 backend. Unfortunately, the lowering patterns had a bug in the i32-to-i64 special case (when we know the generating instruction zeroes the upper 32 bits): it wasn't actually special casing for an i32 source! This meant that e.g. zero extends of the results of i8 adds did not work properly. This PR fixes the bug and updates the runtest for extends significantly to cover the narrow-value cases. No security impact to Wasm as Wasm does not use narrow integer types. Thanks @bjorn3 for reporting! * Updated RELEASES for 0.35.1 patch release.
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Builds on #3848; second commit is new.