Skip intermediate PtrAdds.
#1468
Closed
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
A common pattern we see is: ``` %7: ptr = ptr_add %0, 2 %8: ptr = ptr_add %7, 3 ``` This can be annoying because `%7` sometimes isn't really used other than as a vehicle for `%8`. This commit rewrites `%8` to: ``` %8: ptr = ptr_add %0, 5 ``` This can reduce the pressure on the register allocator a little bit. Has a small (0.5%), but measurable effect on big_loop.
github-merge-queue
bot
removed this pull request from the merge queue due to failed status checks
|
I think this one has failed for spurious reasons, but I may have had a cunning plan to extend it, so let's not merge it quite yet. |
|
Closing in favour of an upcoming PR. |
|
Did you mean to close this? |
|
Oops, yes! |
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Outdated suggestions cannot be applied.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.
A common pattern we see is:
This can be annoying because
%7sometimes isn't really used other than as a vehicle for%8. This commit rewrites%8to:This can reduce the pressure on the register allocator a little bit. Has a small (0.5%), but measurable effect on big_loop.