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9 Commits

Author SHA1 Message Date
Andrew Trick
e84bcf520f Add computeBorrowLiveRange 
Compute the live range for the borrow scopes of a guaranteed value. This returns a separate instruction range for
each of the value's borrow introducers. Unioning those ranges would be incorrect. We typically want their
intersection.
 2024-03-05 17:08:13 -08:00
Andrew Trick
ef940c5297 Redesign gatherBorrowIntroducers to return BeginBorrowValues. 
This avoids a lot of confusion because the callers expect this type. Fixing it just required some redundancy and
bridging in the EnclosigValues implementation.
 2024-03-05 17:08:13 -08:00
Andrew Trick
15fef6868c BorrowUtils: add a comment 2024-02-12 09:57:14 -08:00
Andrew Trick
37171e698a Handle mark_dependence [nonescaping] like a borrowing instruction. 2024-01-22 23:57:03 -08:00
Andrew Trick
8341b73b8c Update OwnershipLiveness comments for code review. 2024-01-17 09:07:02 -08:00
Andrew Trick
196ae17405 Add a reborrow cache to EnclosingValues. 
Along with motivating unit tests.
 2024-01-17 08:37:14 -08:00
Andrew Trick
c10c545cbe OwnershipUtils review feedback: code formatting. 2024-01-17 08:37:14 -08:00
Andrew Trick
d445754e6f OwnershipUtils review feedback: Comments and examples. 2024-01-17 08:37:14 -08:00
Andrew Trick
1646a667c1 Add BorrowUtils: OSSA infrastructure for borrow scopes. 
Key APIs necessary for using OSSA.

- BorrowingInstruction

- BeginBorrowValue

- scopeEndingOperands

- BorrowIntroducers

- EnclosingValues

- innerAdjacentPhis

These need to be complete to be correct.
 2024-01-17 08:37:14 -08:00