| Issue |
147049
|
| Summary |
[DAG] foldABSToABD - add value tracking pattern matching
|
| Labels |
llvm:SelectionDAG
|
| Assignees |
|
| Reporter |
RKSimon
|
This is currently limited to (ABS (SUB (EXTEND a), (EXTEND b))) style patterns, but we can also fold to ABDS/ABDU is there are sufficient signbits / known zero signbits.
ABDU alive2: https://alive2.llvm.org/ce/z/Aqx5p2
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