llvm-project

Author SHA1 Message Date

Author	SHA1	Message	Date
Noah Goldstein	4fd3401e76	[KnownBits] Improve implementation of `KnownBits::abs` `abs` preserves the lowest set bit, so if we know the lowest set bit, set it in the output. As well, implement the case where the operand is known negative. Reviewed By: foad, RKSimon Differential Revision: https://reviews.llvm.org/D150100	2023-05-23 13:52:39 -05:00
Noah Goldstein	261e5d0951	[ValueTracking] Add tests for knownbits of `abs`; NFC Reviewed By: RKSimon Differential Revision: https://reviews.llvm.org/D150099	2023-05-16 18:58:13 -05:00

Noah Goldstein

4fd3401e76

[KnownBits] Improve implementation of KnownBits::abs

`abs` preserves the lowest set bit, so if we know the lowest set bit,
set it in the output.

As well, implement the case where the operand is known negative.

Reviewed By: foad, RKSimon

Differential Revision: https://reviews.llvm.org/D150100

2023-05-23 13:52:39 -05:00

Noah Goldstein

261e5d0951

[ValueTracking] Add tests for knownbits of abs; NFC

Reviewed By: RKSimon

Differential Revision: https://reviews.llvm.org/D150099

2023-05-16 18:58:13 -05:00

2 Commits