YJIT: Merge csel and mov on arm64 #7747
Merged
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Outdated suggestions cannot be applied.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.
This PR merges
csel
andmov
on arm64 when themov
is just moving theInsnOut
ofcsel
to another register. The first commit does refactoring that is useful for this change, and the second commit does the optimization.I don't see a significant impact on benchmarks, but this should help the stack temp register allocation performance #7659.
Example
before
after