stdlib/SILGen: Emit SIL for Swift runtime availability queries #84943
Conversation
This file contains hidden or 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
tshortli
requested review from
a team,
AnthonyLatsis,
hborla,
jckarter,
rjmccall,
slavapestov and
xedin
as code owners
Contributor
Author
|
@swift-ci please test |
tshortli
commented
Oct 16, 2025
| #else | ||
| @available(SwiftStdlib 5.7, *) | ||
| public static var current: Self { .v6_3_0 } | ||
| public static var current: Self { |
Contributor
Author
There was a problem hiding this comment.
This duplication is a workaround for the fact that the parser doesn't seem to support wrapping @_noLocks in conditional compilation guards when the attribute is attached to an accessor.
tshortli
force-pushed
the
silgen-swift-runtime-availability
branch
from
1d8a4f4 to
62a255f
Compare
When emitting SIL for `if #available(Swift ..., *)` queries, call the new `_isSwiftRuntimeVersionAtLeast()` function in the stdlib to check the condition. To support back deployment, the implementation of `_isSwiftRuntimeVersionAtLeast()` is `@_alwaysEmitIntoClient` and performs its comparison against the result of `_SwiftStdlibVersion.current`, which is pre-existing ABI that the stdlib exposes for querying the Swift runtime version. Resolves rdar://162726037.
tshortli
force-pushed
the
silgen-swift-runtime-availability
branch
from
62a255f to
085f8ec
Compare
Contributor
Author
|
@swift-ci please test |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
1 participant
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Outdated suggestions cannot be applied.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.
When emitting SIL for
if #available(Swift ..., *)queries, call the new_isSwiftRuntimeVersionAtLeast()function in the stdlib to check the condition. To support back deployment, the implementation of_isSwiftRuntimeVersionAtLeast()is@_alwaysEmitIntoClientand performs its comparison against the result of_SwiftStdlibVersion.current, which is pre-existing ABI that the stdlib exposes for querying the Swift runtime version.Resolves rdar://162726037.