| Issue |
125675
|
| Summary |
[VectorCombine] foldInsExtFNeg -support mismatching extract/insert indices
|
| Labels |
missed-optimization,
llvm:transforms
|
| Assignees |
|
| Reporter |
RKSimon
|
foldInsExtFNeg is currently limited to `insert(dst, fneg(extract(src,idx)), idx)` patterns with the same extract/insert index.
We should be able to handle cases where the (legal) indices are different with suitable shuffle masks + costs.
CC @ParkHanbum who's handled similar cases in the past
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