Some small deinit-barrier related optimizations #81159
Merged
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
eeckstein
requested review from
atrick,
meg-gupta and
nate-chandler
and removed request for
jckarter and
xymus
|
@swift-ci test |
|
@swift-ci benchmark |
meg-gupta
reviewed
Apr 29, 2025
There was a problem hiding this comment.
Is it valid to have isDeinitBarrier as false for such functions by default ?
There was a problem hiding this comment.
Yes, it should be valid. "Program termination point" functions are functions like fatalError and exit. They are not accessing objects (except strings).
There was a problem hiding this comment.
can you add that as a comment ?
|
@swift-ci test linux |
…fined in the same module This case was neglected. The fix can result in better side effect analysis, e.g. in the stdlib core module.
…, even if library evolution is turned on. This is possible because no copy of the function is emitted in the original module.
This API already existed in Swift, but not in the C++ SIL.
…he inlined function is not a deinit barrier. There is no need to do so. And this can enable other optimizations for non-lexical alloc-stacks.
eeckstein
force-pushed
the
deinit-barrier-optimizations
branch
from
b329a10 to
2fc32fb
Compare
|
@swift-ci smoke test |
|
@swift-ci smoke test macos |
|
@swift-ci smoke test windows |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
3 participants
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Outdated suggestions cannot be applied.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 contains a few small optimization improvements which help to reduce the optimization limitations of lexical lifetimes and deinit barriers.
alloc_stackif the inlined function is not a deinit barrier. There is no need to do so. And this can enable other optimizations for non-lexical alloc-stacks.@alwaysEmitIntoClientfunctions, even if library evolution is turned on. This is possible because no copy of the function is emitted in the original module.